CN105224129B

CN105224129B - A kind of pressure-sensing input unit

Info

Publication number: CN105224129B
Application number: CN201510639913.2A
Authority: CN
Inventors: 蒋承忠; 陈风; 牟方胜; 李裕文
Original assignee: TPK Touch Solutions Xiamen Inc
Current assignee: TPK Touch Solutions Xiamen Inc
Priority date: 2015-09-01
Filing date: 2015-09-30
Publication date: 2018-06-22
Anticipated expiration: 2035-09-30
Also published as: CN105224129A; TWM527573U; TW201710860A; TWI617954B

Abstract

The present invention provides a kind of pressure-sensing input unit, including a cover board；One supporting layer；One pressure-sensing input module, it is set between the cover board and the supporting layer, the pressure-sensing input module includes a substrate and is separately positioned on one first pressure sensitivity layer of the substrate upper and lower surface, one second pressure sensitivity layer, the first pressure sensitivity layer includes at least one first pressure sensitivity unit, the second pressure sensitivity layer includes at least one second pressure sensitivity unit, and the first pressure sensitivity unit is arranged in a one-to-one correspondence with the second pressure sensitivity unit and material identical；It is engaged with the first laminating layer between the cover board and the pressure-sensing input module, is engaged between the pressure-sensing input module and the supporting layer with the second laminating layer；The Young's modulus of wherein described substrate and first laminating layer, the second laminating layer Young's modulus than being more than 10.

Description

A kind of pressure-sensing input unit

【Technical field】

The present invention relates to pressure sensing arts more particularly to a kind of pressure-sensing input units.

【Background technology】

As touch-control input technology is constantly updated in recent years, plane touch panel has become the preferred production of input equipment Product.Coming in the recent period, a kind of pressure-sensing device for bringing completely new touch experience has caused one upsurge in touch input equipment field, The change in resistance size of pressure sensing cells after this pressure-sensing device can be pressed by detecting, and judge pressing dynamics Size can be applied individually to any the touch input equipment field for only needing detecting pressure size, can also be with conventional planar touch-control Panel with reference to and take into account two-dimensional coordinate and the three-dimensional detection for pressing dynamics.

But due to the limitation of pressure-sensing electrode material, inevitably by by environment temperature in existing material It influences, such as common pressing object -- the influence of the temperature of finger, generates the variation of certain resistance value, and brought by temperature change Change in resistance greatly affected pressure-sensing electrode to the detection of pressing dynamics size or even there is likely to be because temperature is produced Raw change in resistance is much larger than the change in resistance amount generated due to pressing dynamics size, and causes the detection of pressure change in resistance not smart It is accurate even to detect.

【Invention content】

A kind of pressure-sensing input unit with temperature compensation function is provided in the present invention.

In order to solve the above technical problems, the present invention provides technical solution：One pressure-sensing input unit, including：One cover board； One supporting layer；One pressure-sensing input module, is set between the cover board and the supporting layer, and the pressure-sensing inputs mould Block includes a substrate and is separately positioned on one first pressure sensitivity layer of the substrate upper and lower surface, one second pressure sensitivity layer, first pressure Feel layer include at least one first pressure sensitivity unit, the second pressure sensitivity layer include at least one second pressure sensitivity unit, described first Pressure sensitivity unit is arranged in a one-to-one correspondence with the second pressure sensitivity unit and material identical；The cover board inputs mould with the pressure-sensing It is engaged with the first laminating layer between block, is connected between the pressure-sensing input module and the supporting layer with the second laminating layer It closes；The Young's modulus of wherein described substrate and first laminating layer, the second laminating layer Young's modulus than being more than 10.

Preferably, first laminating layer, the second laminating layer Young's modulus be 100-3000MPa.

Preferably, first laminating layer, the second laminating layer thickness be 25-125 μm.

Preferably, the thickness of the substrate is 50-450 μm.

Preferably, the area of 131 pattern form of the first pressure sensitivity unit 121 and the second pressure sensitivity unit is 25mm²To 225mm²。

Preferably, the second pressure sensitivity unit of at least one first corresponding setting of pressure sensitivity unit forms Wheatstone bridge Two of which resistance, be used to detect a pressing dynamics size, while compensate the pressure-sensing input module due to temperature Caused resistance change.

Preferably, the pressure-sensing input module further comprises the first reference resistance and the second reference resistance, with institute The the second pressure sensitivity unit stated at least one first pressure sensitivity unit and be correspondingly arranged forms Wheatstone bridge.

Preferably, the mode for forming Wheatstone bridge is the first pressure sensitivity unit and the first reference resistance string Connection, the second pressure sensitivity unit being correspondingly arranged are connected with second reference resistance.

Preferably, it is described form Wheatstone bridge mode for the first pressure sensitivity unit with it is described be correspondingly arranged second Pressure sensitivity unit is connected, and first reference resistance is connected with second reference resistance.

Preferably, the first pressure sensitivity unit is set to the upper surface of base plate in array, then the pressure-sensing input Module can detect three dimensional signal simultaneously.

Preferably, the pressure-sensing input unit integrally has at least one neutral surface after the deformation that is pressed, in this Property face strain be 0.

Preferably, one of described at least one neutral surface is located in the substrate, i.e., described first pressure sensitivity unit Strain for negative strain, the strain of the second pressure sensitivity unit is normal strain.

Preferably, unique neutral surface of the neutral surface in substrate for the pressure-sensing input unit, and position In the mechanics median plane of the substrate.

Preferably, the one of arbitrary of at least one neutral surface is not located in the substrate, i.e., described first pressure sensitivity The strain and the strain of the second pressure sensitivity unit of unit are all negative strain or normal strain.

Preferably, the first pressure sensitivity unit and the second pressure sensitivity unit by a pressure drag material in the form of a conducting wire It bends.

Preferably, the pressure drag material include tin indium oxide, tin-antiomony oxide, indium zinc oxide, zinc oxide aluminum, gallium oxide zinc, In indium gallium zinc, nickel nano wire, Pt nanowires, nano silver wire, poly- 3,4- ethene dioxythiophenes, graphene or carbon nanotube It is one or more.

Preferably, the design of the first pressure sensitivity unit and/or the second pressure sensitivity unit is total for towards a direction Projected length is maximum, a direction of the direction for the first pressure sensitivity unit and/or the second pressure sensitivity unit, first pressure The total projection length of the pattern of sense unit and the second pressure sensitivity unit towards a direction is minimum, and the direction is b directions, wherein, institute It is vertical with the b directions to state a directions.

Preferably, the pattern form of the first pressure sensitivity unit and the second pressure sensitivity unit includes oval around linear, folding Threadiness, curve-like, isometric multi-stage series are linear, Length discrepancy multi-stage series are linear or a kind of or combination of Back Word molded line shape.

Preferably, the shape of the second pressure sensitivity unit being correspondingly arranged described in the first pressure sensitivity unit differs.

Preferably, a directions of the first pressure sensitivity unit and the maximum strain direction of the first pressure sensitivity unit region The angled а 1 of angle, the folder in a directions of the second pressure sensitivity unit and the maximum strain direction of the second pressure sensitivity unit region The angled а 2 in angle；When strain is a normal strain, a negative strain, the angular range of angle а 1 and angle a2 is 0 ° -45 °；Or work as When strain is all negative strain, angle a1 is 0 ° -45 °, and angle a2 is 45 ° -90 °；Or when strain is all normal strain, angle a1 is 45 ° -90 °, angle a2 is 0 ° -45 °.

Preferably, when strain is a normal strain, a negative strain, the angular range of angle а 1 and angle a2 is 0 ° -45 °； Or when strain is all negative strain, angle a1 is 0 °, and angle a2 is 90 °；Or when strain is all normal strain, angle a1 is 90 °, Angle a2 is 0 °.

Preferably, when strain is all negative strain, the pattern shape of the first pressure sensitivity unit and the second pressure sensitivity unit The relationship of shape is expressed as：

L_{Upper a}/L_{Upper b}>L_{Lower a}/L_{Lower b}

Wherein, L_{Upper a}It is expressed as the total projection length towards a directions of the first pressure sensitivity unit, L_{Upper b}It is expressed as the first pressure sensitivity unit The total projection length towards b directions, L_{Lower a}It is expressed as the total projection length towards a directions of the second pressure sensitivity unit, L_{Lower b}It is expressed as second The total projection length towards b directions of pressure sensitivity unit.

Preferably, when strain is all normal strain, the pattern shape of the first pressure sensitivity unit and the second pressure sensitivity unit The relationship of shape is expressed as：

L_{Upper a}/L_{Upper b}＜ L_{Lower a}/L_{Lower b}

Preferably, the first pressure sensitivity unit is formed with the second pressure sensitivity unit by a metal grill, the metal Grid is formed by lametta in the form of lattice.

Preferably, the metal grill is directive metal grill, and the lattice of the metal grill is towards one The total projection length of the lametta in direction is maximum, and the direction is the c directions of the lattice, and the lattice is towards a side To lametta total projection it is minimum, the direction is e directions, wherein, the c directions are vertical with the e directions.

Preferably, the lattice has a long axis direction, the c directions of the long axis direction and the lattice.

Preferably, the metal mesh of the lattice of the metal grill of the first pressure sensitivity unit and the second pressure sensitivity unit The lattice and its long axis direction of lattice differ.

Preferably, the maximum strain direction in the c directions and its region of the lattice of the first pressure sensitivity unit The angled d1 of angle, the folder in the c directions of the lattice of the second pressure sensitivity unit and the maximum strain direction of its region The angled d2 in angle；When strain is a normal strain, a negative strain when, the angular range of the angle d1 and the angle d2 for 0 °- 45°；Or when strain is all negative strain, angle d1 is 0 ° -45 °, and angle d2 is 45 ° -90 °；Or when strain is all normal strain, Angle d1 is 45 ° -90 °, and angle d2 is 0 ° -45 °.

Preferably, when strain is a normal strain, a negative strain, the angular range of the angle d1 and the angle d2 are 0°；Or when strain is all negative strain, angle d1 is 0 °, and angle d2 is 90 °；Or when strain is all normal strain, angle d1 is 90 °, angle d2 is 0 °.

Preferably, when strain is all negative strain, the metal grill of the first pressure sensitivity unit and formation second pressure Feel the lattice of the metal grill of unit, it is specific as follows：

L_c1/L_e1＜ L_c2/L_e2

Wherein, L_c1It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin metal in the c directions The total projection length of line, L_e1It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin gold in the e directions Belong to the total projection length of line, L_c2It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin of the c directions The total projection length of metal wire, L_e2It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the e directions The total projection length of lametta.

Preferably, when strain is all normal strain, the metal grill of the first pressure sensitivity unit and formation second pressure Feel the lattice of the metal grill of unit, it is specific as follows：

L_c1/L_e1>L_c2/L_e2

Preferably, the lattice includes at least one grid cell, and a plurality of grid cells arrange to form institute State lattice.

Preferably, the supporting layer is a display layer.

Compared with prior art, pressure-sensing input unit provided by the present invention at least has the following advantages：

The present invention provides a kind of pressure-sensing input unit with temperature compensation function, the pressure-sensing input units Pressing force value is detected using Wheatstone bridge, circuit structure is simple, and control accuracy is high, can also be by adjusting feeling of stress The substrate of input unit and the Young's modulus and its thickness of laminating layer are surveyed, increases the strain differential of the pressure sensitivity unit of substrate upper and lower surface It is different.

Further, by limiting the pattern form of pressure sensitivity unit in the pressure-sensing input unit, make pressure sensitivity unit Total projection length and the long axis direction and pressure sensitivity unit place with long axis direction (a directions) and short-axis direction (b directions) The angular relationship in the maximum strain direction in region further increases resistance change effect, further makes the first pressure sensitivity layer or the Two pressure sensitivity layers are more precisely sensitiveer to the response of pressure.

Pressure-sensing input unit provided by the invention additionally provides a kind of use metal grill and is made in touch device The technical solution of pressure sensitivity unit, and pressure is further improved according to the lattice diversity for the metal grill for forming pressure sensitivity unit The sensitivity of power inductor.

【Description of the drawings】

Figure 1A is the layer structure schematic diagram in first embodiment of the invention pressure-sensing input module.

Figure 1B is that pressure signal detects schematic diagram in Figure 1A.

Fig. 1 C are another pressure signal detecting schematic diagrams in Figure 1A.

Fig. 2A is the layer structure schematic diagram of second embodiment of the invention pressure-sensing input unit.

Fig. 2 B are the structure diagrams deformed after the depressed power of pressure-sensing input unit shown in Fig. 2A.

Fig. 2 C are the trend graphs of each ply strain amount after the depressed power of pressure-sensing input unit shown in Fig. 2 B.

Fig. 3 A are the strain differential and laminating layer of the first pressure sensitivity unit and the second pressure sensitivity unit in second embodiment of the invention The relation schematic diagram of Young's modulus.

Fig. 3 B are the strain differential and laminating layer of the first pressure sensitivity unit and the second pressure sensitivity unit in second embodiment of the invention Another relation schematic diagram of Young's modulus.

Fig. 3 C are the strain differential and laminating layer of the first pressure sensitivity unit and the second pressure sensitivity unit in second embodiment of the invention The relation schematic diagram of thickness.

Fig. 3 D are the thickness of the strain differential and substrate of the first pressure sensitivity unit and the second pressure sensitivity unit in second embodiment of the invention The relation schematic diagram of degree.

Fig. 4 is the planar structure schematic diagram of the first pressure sensitivity layer of fourth embodiment of the invention pressure-sensing input unit.

Fig. 5 A are the first pressure sensitivity layer of fourth embodiment of the invention pressure-sensing input unit and its plane of pressing area Schematic diagram.

Fig. 5 B-5E are the schematic illustration of strain of pressing area at A-D in Fig. 5 A.

Fig. 6 A are the planar structure schematic diagrams of single first pressure sensitivity unit in Fig. 4.

Fig. 6 B are a directions of the first pressure sensitivity unit in Fig. 6 A and the length in b directions and the schematic diagram of long axis direction.

Fig. 6 C-6G are the variant embodiment structure diagrams of single first pressure sensitivity unit in Fig. 4.

Fig. 7 A- Fig. 7 B are the lattice signals of direction-free metallic mesh material shown in fifth embodiment of the invention Figure.

Fig. 7 C- Fig. 7 F are the lattice signals of directive metallic mesh material shown in fifth embodiment of the invention Figure.

Fig. 8 A are the first pressure sensitivity layer in fifth embodiment of the invention pressure-sensing input unit, substrate, the second pressure sensitivity layer Cross-sectional view.

Fig. 8 B are strain-thickness relationship figures of structure shown in Fig. 8 A.

Fig. 8 C are that the first pressure sensitivity unit region is most on the first pressure sensitivity layer of pressure-sensing input unit shown in Fig. 8 A It should change direction greatly.

Fig. 8 D are the second pressure sensitivity lists with being correspondingly arranged on the second pressure sensitivity layer with the first pressure sensitivity unit shown in Fig. 8 A The maximum strain direction of first region.

【Specific embodiment】

In order to make the purpose of the present invention, technical solution and advantage are more clearly understood, below in conjunction with attached drawing and embodiment, The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, It is not intended to limit the present invention.

A is please referred to Fig.1, a pressure-sensing input module 10 is provided in first embodiment of the invention, including a substrate 11 And positioned at substrate, about 11 (in the present invention, upper-lower position word is only used for limiting the relative position in given view) surface respectively First pressure sensitivity layer 12 and the second pressure sensitivity layer 13.At least one first pressure sensitivity unit 121, the second pressure are provided on first pressure sensitivity layer 12 At least one second pressure sensitivity unit 131, at least one first pressure sensitivity unit 121 and at least one second pressure are provided on sense layer 13 Sense unit 131 is to be arranged in a one-to-one correspondence, wherein, the one-to-one correspondence in the present invention refers to each first pressure sensitivity unit 121 and each second The one-to-one correspondence on the quantity of lower surface and distributing position on the substrate 11 of pressure sensitivity unit 131, and each first pressure sensitivity unit 121 and The pattern form of each second pressure sensitivity unit 131 is then unrestricted.When substrate 11 is depressed, at the press points it is corresponding at least One the first pressure sensitivity unit 121 will be under pressure at least one second pressure sensitivity unit 131.

First pressure sensitivity unit 121 and the second pressure sensitivity unit 131 cause the strains such as deformation, deflection or shearing when being pressed Property reaction, change so as to cause at least one electrical property, particularly, when the first pressure sensitivity unit 121 and the second pressure sensitivity unit 131 are bent by a pressure drag material in the form of a conducting wire, and the first pressure sensitivity unit 121 of corresponding region is caused after pressing It changes with the conductor length of the second pressure sensitivity unit 131, and then influences the first pressure sensitivity unit 121 and the second pressure sensitivity unit 131 Resistance value.

In a preferable embodiment, the material identical of the first pressure sensitivity unit 121 and the second pressure sensitivity unit 131, the The area of 131 pattern form of one pressure sensitivity unit 121 and the second pressure sensitivity unit is 25mm²To 225mm², preferably 25mm²Extremely 100mm².It, can be by pressure sensitivity electricity for common force application object (capacitance pen or finger) and the size (0-10N) that normally exerts a force The deformation range that pole (such as the first pressure sensitivity unit 121 and the second pressure sensitivity unit 131) effectively detects, probably understands 25mm²To 225mm² In the range of, and the common force application object with temperature such as finger is after pressing, the range influenced is greatly to also above-mentioned In the range of, the range is more preferably to be less than 100mm².Thus the radial pressure-sensitive electrode 21 of at least one of present embodiment Size is 25mm²To 225mm², more preferably 25mm²To 100mm², with the power with normal adult's finger and temperature action range phase Matching.However in other embodiment, prior art person when can be different according to force application object and amount of force and stipulate Different induction ranges.

Substrate 11 may include but be not only restricted to：Rigid substrates, such as glass, strengthened glass, sapphire glass etc.；Can also be Flexible base board, such as PEEK (polyetheretherketone, polyether-ether-ketone), PI (Polyimide, polyimides), PET (polycarbonate, makrolon gather by (polyethylene terephthalate, polyethylene terephthalate), PC Carbonic ester), PES (polyethyleneglycol succinate, polyethylene glycol succinate), PMMA (polymethylmethacrylate, polymethyl methacrylate), PVC (Polyvinyl chloride, polyvinyl chloride), PP The materials such as (Polypropylene, polypropylene) and its compound of arbitrary the two.

Each first pressure sensitivity unit, 121 corresponding internal resistance in the pressure-sensing input module 10 that first embodiment of the invention provides For RF0, RF1, RF2RFn, when receiving pressing force, the internal resistance RF0 corresponding to each first pressure sensitivity unit 121, RF1, RF2RFn resistance value can change；Each second pressure sensitivity unit 131 is right in pressure-sensing input module 10 The internal resistance answered is RC0, RC1, RC2RCn, and respectively with RF0, RF1, RF2RFn are one by one 11 both sides of substrate are correspondingly arranged at, when receiving pressing force, internal resistance RC0, RC1 corresponding to each second pressure sensitivity unit 131, RC2RCn resistance values can also change.In the present invention, the both ends of 121 conducting wire of the first pressure sensitivity unit are electric respectively Property is connected to a signal processing center (not shown), and the both ends of 131 conducting wire of the second pressure sensitivity unit are respectively and electrically connected to identical Signal processing center (not shown), the signal processing center further comprise the first reference resistance Ra, the second reference resistance Rb and One multiplexer.By the control of multiplexer, sequentially make each first pressure sensitivity unit, 121 resistance RFn (wherein, n=0,1, 2 ... n), the second pressure sensitivity cell resistance 131RCn of setting of being corresponding to it (wherein, n=0,1,2 ... n) with resistance Ra, resistance Rb structures Into Wheatstone bridge.

As shown in Figure 1B and Fig. 1 C, the connection of resistance RF0, resistance RC0, the first reference resistance Ra, the second reference resistance Rb Mode can there are two types of.As shown in Figure 1B, one end of resistance RF0 is electrically connected at a power positive end VEX+, the other end and One reference resistance Ra connects；One end of resistance RC0 is electrically connected at same power positive end VEX+, the other end and the second reference Resistance Rb connects；First reference resistance Ra, the second reference resistance Rb other ends are electrically connected at power cathode end VEX- and (or connect Ground), a potentiometer is used to measure the potential difference signal U0 of resistance RF0, resistance RC0.Or as shown in Figure 1 C, one end of resistance RF0 A power positive end VEX+ is electrically connected at, the other end is connected with resistance RC0；One end of first reference resistance Ra is electrically connected at Same power positive end VEX+, the other end are connected with the second reference resistance Rb；Resistance RC0, the second reference resistance Rb it is another End is electrically connected at power cathode end VEX- (or ground connection) potentiometer and is used to measuring resistance RF0, the first reference resistance Ra Potential difference signal U0.

When no pressing force acts on, each Wheatstone bridge is in equilibrium state.When the depressed masterpiece used time, corresponding position The first pressure sensitivity of one or more unit 121 at place and 131 resistance value of the second pressure sensitivity unit being correspondingly arranged change, and Wheatstone bridge is put down Weighing apparatus is broken and causes output potential difference signal U0 that must change, and different pressure corresponds to the change of different resistance values, accordingly Also different potential difference signals can be generated, therefore, it is calculated and is handled by the potential difference signal U0 to Wheatstone bridge To obtain corresponding pressure value.

As shown in fig. 1b, resistance RF0, resistance RC0, resistance Ra and resistance Rb resistances form Wheatstone bridge, and relationship can It is expressed as：

As is shown in fig. 1C, resistance RF0, resistance RC0, resistance Ra and resistance Rb resistances form Wheatstone bridge, and relationship can It is expressed as：

In first embodiment of the invention in pressure-sensing input module 10, the relationship of resistance and temperature change can be by as follows The derivation of equation obtains：The calculation formula of the resistance R of object is：

R=ρ L/S (1)；

Wherein, ρ be expressed as composition the first pressure sensitivity unit 121, the second pressure sensitivity unit 131 material resistivity, L be this hair The length of first pressure sensitivity unit 121, the second pressure sensitivity unit 131 in bright, S is the first pressure sensitivity unit 121, the second pressure sensitivity unit 131 The cross-sectional area of current direction.

The first pressure sensitivity unit 121 is formed in the present invention, the electricalresistivityρ of material of the second pressure sensitivity unit 131 varies with temperature Formula be：

ρ_T=ρ (1+ α T) (2)；

Wherein, ρ be form the first pressure sensitivity unit 121, the second pressure sensitivity unit 131 material resistivity, α be resistance temperature Coefficient is spent, T is temperature.

With reference to above-mentioned formula (1) and formula (2)：

When environment temperature is T₀When (such as T=0) when, the resistance value of object is：

R_T0=ρ L/S (3)；

When environment temperature is T₁When, the resistance value of object is：

R_T1=ρ L/S (1+ α (T₁-T₀)) (4)；

The Δ R that material resistance value is affected by temperature can be derived by above-mentioned formula (1)-formula (4)_TIt is represented by such as following formula (5)：

ΔR_T=R_T1-R_T0

=ρ L/S (1+ α (T₁-T₀))-ρL/S

=α Δs T (ρ L/S)

=Δ T α R (5)；

Wherein, Δ T represents temperature variation.

In the pressure-sensing input module 10 that first embodiment of the invention is provided, in Wheatstone bridge RF0, RC0, Ra with The relationship expression of Rb is as above stated shown in formula (Q) and formula (P).

By taking formula (Q) as an example, when temperature change (temperature variation is expressed as Δ T), the first pressure sensitivity unit 121 and its position The resistance change of the second pressure sensitivity unit 131 being correspondingly arranged is respectively as shown in formula (6) and formula (7)：

Δ RF0=Δ T α × RF0 (6)；

Δ RC0=Δ T α × RC0 (7)；

By above-mentioned formula (1)-formula (8), it can be deduced that the second pressure sensitivity list that the first pressure sensitivity unit 121 is correspondingly arranged with its position The resistance variations of member 131 are represented as shown in formula (8)：

The first pressure sensitivity unit 121 is made of with the second pressure sensitivity unit 131 same material it can be seen from formula (9), identical Temperature variation, formula (8) can also from which further follow that formula (9)：

From above-mentioned formula (9) as can be seen that from the point of view of according to the characteristic of temperature conduction, identical material is in identical temperature variation Under the influence of Δ T, temperature coefficient α is identical, when the first pressure sensitivity unit 121 is identical with 131 use of the second pressure sensitivity unit Material, during resistance measurement, variation of the temperature to 131 resistance value of the first pressure sensitivity unit 121 and the second pressure sensitivity unit Amount Δ RF0 and Δ RC0 can cancel out each other by way of shown in formula (9), and therefore, temperature is to pressure-sensing input module 10 Influence is zero.

By taking formula (P) as an example, with formula (Q) temperature variation be Δ T when difference lies in：

Wherein, the specific derivation process of formula (10) is identical with formula (8) and formula (9), therefore, details are not described herein.

From the result of above-mentioned formula (9) and formula (10) it is found that Figure 1B makes temperature with the wheatstone bridge configuration shown in Fig. 1 C Degree is zero to the resistance value influences of the second pressure sensitivity unit 131 of the first pressure sensitivity unit 121 and corresponding setting, so as to fulfill complete Full temperature compensation.

In addition, from the point of view of according to the characteristic of power conduction, since the first pressure sensitivity unit 121 and the second pressure sensitivity unit 131 set up separately The upper and lower surface of substrate 11, since substrate 11 has certain thickness, its levels after depressed active force of substrate 11 Deformation difference is had, and then makes to be disposed thereon between the first pressure sensitivity unit 121 of lower surface and the second pressure sensitivity unit 131 and also can Generate deformation difference.Further, different pressing power, the levels of caused substrate 11 and the first pressure sensitivity unit 121 It is also differed with the deformation difference of the second pressure sensitivity unit 131.

When no pressing force acts on, the Wheatstone bridge shown in Figure 1B and Fig. 1 C is in equilibrium state.When by by When pressure acts on, one or more resistance values of the first pressure sensitivity unit 121 and/or the second pressure sensitivity unit 131 change, in this way, favour this Logical bridge balance is broken and causes output electric signal U0 that must change：The power such as pressed is larger, then the first pressure sensitivity list Member 121 and 131 resistance value of the second pressure sensitivity unit have larger variable quantity；On the contrary, if the power pressed is smaller, first presses The resistance value for feeling 121 and second pressure sensitivity unit 131 of unit has small change amount.The change of different resistance values corresponds to different pressures Force value, therefore, it is calculated and is handled by the output signal U 0 to Wheatstone bridge, you can to obtain corresponding pressure value.

In the present invention, when each first pressure sensitivity unit 121 and each second pressure sensitivity unit 131 are to be set to substrate 11 in array During upper and lower surface, pressure-sensing input module 10 can be not limited in the size of detection pressing strength, can be also used for synchronous inspection Survey the signal of pressing position (planar) and pressing strength (third dimension) this three dimensionality.After pressing, the first pressure sensitivity unit 121 And the second shape change inside pressure sensitivity unit 131 causes corresponding change in resistance, it can be according to calculating what change in resistance generated The size of position and variable quantity come judge press points position and pressing strength size, utilize the first pressure sensitivity list being correspondingly arranged up and down 121 and second pressure sensitivity unit 131 of member had not only carried out position detection (planar) but also had carried out the calculating of strength detection (third dimension), It is detected while so as to fulfill three dimensionality.

In order to form the pressure-sensing input unit that can be used for touch-control input, need to be carried in the first embodiment of the invention Other modules are added on the basis of the pressure-sensing input module 10 of confession.Further, since pressing force and its generated deformation are special Property, when pressure-sensing input module 10 is overlapped with other modules, for being bonded the laminating layer of each module and pressure-sensing It is sensitive to the sensing of pressure value size that the parameters such as thickness, the Young's modulus of input module 10 will influence pressure-sensing input module 10 Degree and accuracy.

Fig. 2A-Fig. 2 B are please referred to, second embodiment of the invention provides a kind of pressure-sensing input unit 20, includes successively One cover board 24, one first laminating layer 221, a pressure-sensing input module 21, one second laminating layer 222 and a supporting layer 25.Pressure Power sensing input module 21 is similar to the pressure-sensing input module 10 that first embodiment provides, and including a substrate 201 and sets The the first pressure sensitivity layer 202 and the second pressure sensitivity layer 203 in 201 upper and lower surface of substrate are put, is included on the first pressure sensitivity layer 202 at least one First pressure sensitivity unit 211 includes at least one second pressure sensitivity unit 212, related first pressure sensitivity unit on second pressure sensitivity layer 203 211 is identical with first embodiment of the invention with the concrete structure of the second pressure sensitivity unit 212, omits repeat no more herein.

The material of the cover board 24 can be hard cover board, such as glass, strengthened glass, sapphire glass；It can also be Soft cover board, such as PEEK (polyether etherketone polyether-ether-ketones), PI (Polyimide polyimides), PET (polyethyleneterephthalate polyethylene terephthalates), PC (makrolon makrolon), PES (poly- fourths Naphthalate, PMMA (polymethyl methacrylate polymethyl methacrylate) and its both arbitrary compound The materials such as object.

First laminating layer 221 and the second laminating layer 222 can select OCA (Optical transparent adhesive, Optical Clear ) or LOCA (Liquid optical clear adhesive, Liquid Optical Clear Adhesive) Adhesive.

In a further embodiment, supporting layer 25 may further be display layer, and display layer may include liquid crystal display (LCD) Element, Organic Light Emitting Diode (OLED) element, electroluminescent display (ELD) etc..Fig. 2 B are please referred to, when finger presses cover clamp When 24, power caused by finger pressing is from top to bottom successively transferred to supporting layer 25.During finger pressing, strain and composition The thickness of each layer, material are related in pressure-sensing input unit 20.In the present invention in one embodiment, pressure-sensing is defeated The thickness for entering device 20 is about 950 μm, after finger press pressure sensing input device 20, with the upper of pressure-sensing input unit 20 Surface is expressed as the zero of thickness, and the strain of pressure-sensing input unit 20 is measured from top to bottom, by pressure-sensing The thickness of input unit 20 and its corresponding dependent variable are compared, and draw the strain obtained as shown in FIG. 2 C (Elastic Strain)-thickness relationship figure.

Wherein, dependent variable-thickness relationship figure is closely related with the whole stepped construction of pressure-sensing input unit 20, In the present embodiment, pressure-sensing input unit 20 includes cover board 24, the first laminating layer 221, pressure-sensing input module 21, and the Two laminating layers 222 and supporting layer 25, the variation of the parameters such as any of the above-described layer of thickness, Young's modulus all can be to dependent variable-thickness The form of curve impacts in relational graph, and therefore, dependent variable-thickness relationship figure as shown in FIG. 2 C is merely represented in specific item The substantially trend graph of similar structures under part.

The pressure-sensing input unit 20 integrally has at least one neutral surface (not shown) after the deformation that is pressed, in Property face for object the plane that becomes zero of shape under stress effect, in should becoming zero for neutral surface, i.e. strain value is zero.In Fig. 2 C Shown in Z, the strain value of the correspondence layer thickness of pressure-sensing input unit 20 being directed toward at Z is corresponding feeling of stress at zero, Z Five neutral surfaces for surveying input unit 20 are located at cover board 24, the first laminating layer 221, pressure-sensing input module 21, second respectively In laminating layer 222 and supporting layer 25.Using neutral surface as interface in pressure-sensing input unit 20, strain value can be divided into normal strain And negative strain (herein and following normal strain, negative strain represent its deformed state to stretch, compressing respectively).

With reference to Fig. 2 B and Fig. 2 C it is found that when finger presses, corresponding 20 upper surface (cover board of pressure-sensing input unit 24 upper surface) strain be 1.7225e-5；

In cover board 24, strain gradually increases, and is changed by negative strain-zero strain-normal strain；

Strain value of the corresponding strain value in I places for 24 and first laminating layer of cover board, 221 composition surface, the strain on the composition surface Reach peak 1.6478e-5；

In the first laminating layer 221, strain is gradually reduced, and variation tendency is normal strain-zero strain-negative strain；

The corresponding strain value in II place is the first laminating layer 221 and the strain on the composition surface of pressure-sensing input module 21 Value, the strain on the composition surface strain for negative direction and close to zero；

In pressure-sensing input module 21, strain incrementally increases, and after reaching certain value (about 5e-5), and strain size is not Increase with the increase of thickness；

Strain value of the corresponding strain value in III place for the composition surface of 21 and second laminating layer 23 of pressure-sensing input module, Strain is about 5e-5 accordingly on the composition surface；

In the second laminating layer 222, strain is gradually reduced, and variation tendency is normal strain-zero strain-negative strain；

The corresponding strain value in IV place is the second laminating layer 222 and the strain value on the composition surface of supporting layer 25, the composition surface Corresponding strain is about -9.7e-6；

In supporting layer 25, strain is gradually increasing, and variation tendency is negative strain-zero strain-normal strain.

As it can be seen that in pressure-sensing input unit 20, the first laminating layer 22 with cover board 24 and with pressure-sensing input module 21 joint, the second laminating layer 23 and pressure-sensing input module 21 and the joint with supporting layer 25, the variation of strain become Gesture changes, and strain is made just to change by the negative variation of forward direction or by negative sense, it is seen then that the first laminating layer 22 and the second laminating layer 23 Setting, decline the strain of pressure-sensing input unit 20, the first laminating layer 22, the second laminating layer 23 and pressure-sensing input Module 21 engages, and the influence reduced to the strain of pressure-sensing input module 21 with the second laminating layer 23 of the first laminating layer 22 is smaller, The strain value that can make pressure-sensing input module 21 is bigger.

It is arranged in a one-to-one correspondence in several the first pressure sensitivity units 211 of 201 upper and lower surface of substrate and the second pressure sensitivity unit 212 Depressed power before and after strain difference it is bigger, then its corresponding resistance value difference is bigger, big to pressing dynamics so as to obtain Sluggishness preferably pressure-sensing input unit 20.

In practical application level, the aforementioned five-layer structure of pressure-sensing input unit 20, because of the first laminating layer 221, Two laminating layers 222 are engaged with the first pressure sensitivity unit 211 and the second pressure sensitivity elementary layer 212, the first pressure sensitivity unit 211 and the second pressure sensitivity Elementary layer 212 is arranged on the upper and lower surface of substrate 201, and the material of the first laminating layer 221, the second laminating layer 222 and substrate 201 Alternative at most, thus only mainly the material selection situation of this three is introduced in the present invention.

Fig. 3 A are please referred to, in the first deformation of the pressure-sensing input unit 20 that second embodiment of the invention is provided, base The Young's modulus E of plate 201₁For 73.3GPa, the thickness of substrate 201 is preferably 100 μm.(it includes the first laminating layer to laminating layer 22 221 and/or second laminating layer 222) thickness be 50 μm, the Young's modulus E of laminating layer 22₂Ranging from 100-3000MPa, base The Young's modulus E of plate 201₁Than the Young's modulus E of laminating layer₂It is more than big at least one order of magnitude, i.e. E₁/E₂>10；In this deformation In embodiment：

E₁/E₂>=24.4；

The Young's modulus of laminating layer 22 is very small compared to the Young's modulus of substrate 201, it is seen then that laminating layer 22 and substrate 201 different from those is larger, the first pressure sensitivity unit 211 and the strain size of the second pressure sensitivity unit 212 being arranged on substrate 201 It is easier to embody the variation of substrate 201, strain is in increase tendency, thus, it is possible to obtain the strain differential Δ ε of bigger.First pressure Strain differential Δ ε between sense 211 and second pressure sensitivity unit 212 of unit rises with the decline of the Young's modulus of laminating layer 22, Wherein, when the Young's modulus of laminating layer 22 is 100-1000MPa, strain differential Δ ε is with the drop of the Young's modulus of laminating layer 22 It is low and dramatically increase.

By repeatedly studying, it was therefore concluded that as follows：The Young's modulus of substrate 22 is for a fixed value and at least more than laminating layer During at least one order of magnitude of 22 Young's modulus, strain differential Δ ε and the Young's modulus of laminating layer 22 are negatively correlated.

In a further embodiment, E₁/E₂Value it is more excellent be more than or equal to 100.

Please refer to Fig. 3 B, the second deformation implementation side of the pressure-sensing input unit 20 that second embodiment of the invention is provided Formula, the Young's modulus difference lies in substrate 201 compared with above-mentioned first variant embodiment is only 6000MPa, works as fitting When the Young's modulus of layer 22 is 1000-3000MPa, the Young's modulus E of substrate 201₁With the Young's modulus E of laminating layer 22₂Ratio For 2-6, E₁/E₂Value is less than 10.The first pressure sensitivity unit 211 being arranged on substrate 201 should become larger with the second pressure sensitivity unit 212 It is small related with laminating layer 22 and substrate 201, due to the Young's modulus of laminating layer 22 differ with the Young's modulus of substrate 201 compared with It is small, when laminating layer 22 and the performance (such as elastic property) of substrate 201 are similar, the first pressure sensitivity unit 211 and the second pressure sensitivity unit 212 Between strain differential variation it is irregular, it is seen then that as the Young's modulus E of substrate 201₁For smaller value, and its Young with laminating layer 22 Modulus E₂Ratio when being less than 10, the Young's modulus of laminating layer 22 is not notable to the effect for increasing strain differential Δ ε.

Please refer to Fig. 3 C, the third deformation implementation side for the pressure-sensing input unit 20 that second embodiment of the invention is provided Formula, compared with above-mentioned first variant embodiment difference lies in the thickness range of laminating layer 22 be 25-125 μm when, first Pressure sensitivity unit 211 is inversely proportional with the strain differential Δ ε of the second pressure sensitivity unit 212 and the variation size of the thickness of laminating layer 22.Due to Laminating layer 22 can make the first pressure sensitivity unit 211 and the strain value of the second pressure sensitivity elementary layer 212 of corresponding setting become smaller, because This, laminating layer 22 is thinner, and the influence to the first pressure sensitivity unit 211 and the second pressure sensitivity unit 212 becomes smaller, so as to make strain differential Δ ε is bigger, but influence of the thickness change of laminating layer 22 to strain differential Δ ε is much smaller than the Young's modulus of laminating layer 22 to strain The influence of poor Δ ε.When 22 thickness range of laminating layer is less than 25 μm, since 22 thickness of laminating layer is excessively thin, will be unable to play will paste The effect of conjunction makes to engage between each layer structure in pressure-sensing input unit 20 not closely, and reduces pressure-sensing input unit 20 product quality；And when the thickness range of laminating layer 22 is more than 125 μm, since the thickness of laminating layer 22 is excessive so that pressure Power sensing input device 20 is in depressed active force, the second pressure sensitivity list of the first pressure sensitivity unit 211 and corresponding setting The strain value of first layer 212 becomes smaller, and since the two numerical value becomes smaller, the difference (i.e. strain differential Δ ε) of the two also can accordingly become smaller.

Please refer to Fig. 3 D, the 4th deformation implementation side of the pressure-sensing input unit 20 that second embodiment of the invention is provided Formula, compared with above-mentioned first variant embodiment difference lies in the thickness range of substrate 201 be 50-450 μm when, first pressure Sense unit 211 is directlyed proportional to the strain differential Δ ε of the second pressure sensitivity unit 212 to the variation size of the thickness of substrate 201.Due to substrate 201 thickness is bigger, is arranged on the first pressure sensitivity unit 211 of 201 upper and lower surface of substrate and the strain differential of the second pressure sensitivity unit 212 The strain value positive correlation of Δ ε and substrate 201, thickness is bigger, and the strain of substrate 201 is bigger, then strain differential Δ ε is also bigger.But It is the too thick temperature that can be influenced between the first pressure sensitivity unit 211 of 201 upper and lower surface of substrate and the second pressure sensitivity unit 212 of substrate 201 Compensation effect and the integral thickness of equipment are spent, therefore, when the thickness range of substrate 201 is 50-450 μm, strain differential Δ ε and base The thickness positive correlation of plate 201.

When the thickness of substrate 201 is less than 50 μm, since pressure-sensing input unit 20 is excessively thin so that be arranged on substrate Strain differential Δ ε values between the first pressure sensitivity unit 211 and the second pressure sensitivity unit 212 of 201 upper and lower major surfaces are smaller, can not be effective Sense the size of pressing dynamics；And when the thickness of substrate is more than 450 μm, it can not only make the entirety of pressure-sensing input unit 20 Thickness is excessive, can also so that the temperature variation between the first pressure sensitivity unit 211 and the second pressure sensitivity unit 212 is different, from And influence the effect of temperature-compensating.

Third embodiment of the invention provides a kind of pressure-sensing input unit (not shown), with above-mentioned second embodiment Difference lies in the present embodiment can by adjusting the thickness and its Young's modulus of each layer structure of pressure-sensing input unit, from And make one of integrally-built at least one neutral surface of pressure-sensing input unit, it is in the mechanics of the substrate Property face, wherein, neutral surface is the plane that becomes zero of pressure-sensing input module planted agent, in this way, being arranged in substrate (not shown) The strain of first pressure sensitivity unit (not shown) of main surface is negative strain, and is arranged on the second pressure sensitivity unit of substrate bottom major surface The strain of (not shown) is normal strain, therefore, under the effect of identical pressing force, the first pressure sensitivity unit and the second pressure sensitivity unit should Variation Δ ε will be greater than its strain and be all just or be all negative situation, have the first pressure sensitivity unit of increase and the second pressure sensitivity unit The advantages of strain differential Δ ε.

Further, preferred plan is by adjusting each layer thickness in the pressure-sensing input unit and Young mould Amount makes unique neutral surface that the neutral surface in substrate is the pressure-sensing input unit, and positioned at the substrate Mechanics neutral surface.The integrally-built mechanics symmetrical centre of i.e. described pressure-sensing input unit is located in the mechanics of the substrate Property face, in this way, can make in the case where identical pressing force acts on, the strain differential Δ ε of the first pressure sensitivity unit and the second pressure sensitivity unit is maximum Advantage.So as to effectively improve the pressure-sensing sensitivity of pressure-sensing input module.

Each first pressure sensitivity unit and the second pressure sensitivity unit (figure being arranged in a one-to-one correspondence with it in pressure-sensing input module Do not show) stress difference size other than related with the thickness and Young's modulus of the position and substrate of neutral surface, laminating layer, also There are the first pressure sensitivity unit and the second pressure sensitivity unit pattern shape and the arrangement mode related.

Referring to Fig. 4, fourth embodiment of the invention provides a kind of pressure-sensing input unit 40, with second embodiment Difference lies in the first pressure sensitivity unit 421 that array distribution is provided on the first pressure sensitivity layer 42, only × 9 row arrays are arranged with 5 in Fig. 4 The first pressure sensitivity unit 421 for illustrate, actual quantity is not restricted.Because pressure-sensing input unit 40 is rectangular (non-circular) is influenced by its shape so that different region in the plane of the first pressure sensitivity layer 42, in depressed active force Afterwards, in all directions deformation degree simultaneously differs, and has largest deformation degree along some direction, and has in another direction There is minimum deformation degree.Wherein, the size of deformation degree is related with the pattern form of pressure sensitivity unit.In addition, for adherence pressure The sensitivity of sensing, preferably design are to make the pattern of the first pressure sensitivity unit 421 (maximum along the direction of largest deformation degree Should change direction) on have maximum length.

Particularly, Fig. 5 A are please referred to, behind finger press pressure sensing input device 40, the first pressure sensitivity layer 42 is by power Effect, certain deformation can be generated.Due to common pressure-sensing input unit 40 for it is rectangular (it is non-circular, circle have rotation Turn invariance) without rotational invariance, it is influenced by its shape so that each point is depressed in 42 plane of the first pressure sensitivity layer Degree of strain after active force in all directions is not fully identical, may have maximum strain along a direction, and therewith Vertical other direction has minimum strain, and the degree of strain in other directions is therebetween.Wherein, it is defined on a certain region The direction of middle deformation degree maximum is the maximum strain direction in the region, and the direction of deformation degree minimum is in this region The minimum strain direction in the region, wherein maximum strain direction are mutually perpendicular to minimum strain direction.

In the pressure-sensing input unit 40 without rotational invariance, different zones in 42 plane of the first pressure sensitivity layer Maximum strain direction is also not necessarily identical, and concrete example is as follows：The stress area for choosing pressing respectively is located at the first pressure sensitivity respectively At the center of layer 42 (as shown in A in Fig. 5 A), diagonal angle (as shown in B in Fig. 5 A), long side midpoint be (in such as Fig. 5 A at C It is shown), short side midpoint (as shown in D in Fig. 5 A).

When the stress area of pressing is located at the center of the first pressure sensitivity layer 42, the maximum strain direction at the center is as schemed Direction S in 5B_InIt is shown, maximum strain direction S_InIt is parallel with the long side direction of the first pressure sensitivity layer 42；

When the stress area of pressing is located at the pair of horns of the first pressure sensitivity layer 42, the maximum strain direction of the diagonal angle is such as Direction S in Fig. 5 C_AngleIt is shown, maximum strain direction S_AngleIt is vertical with through the diagonal diagonally connecting；

When the stress area of pressing is located at the long side midpoint of the first pressure sensitivity layer 42, the maximum strain direction at this is such as Direction S in Fig. 5 D_{It is long}It is shown, maximum strain direction S_{It is long}It is vertical with the long side direction of the first pressure sensitivity layer 42；

When the stress area of pressing is located at the short side midpoint of the first pressure sensitivity layer 42, the maximum strain direction at this is as schemed Direction S in 5E_{It is short}It is shown, maximum strain direction S_{It is short}It is parallel with the long side direction of the first pressure sensitivity layer 42.

The stress area pressed in fourth embodiment of the invention only at the center shown in Fig. 5 B- Fig. 5 E, diagonal angle, length Side midpoint and short side midpoint carry out the explanation in maximum strain direction, and the stress area actually pressed is not restricted, In a further embodiment, multiple spot pressing operation simultaneously is can also be achieved, maximum strain direction can combine the present invention the 4th and implement Content obtains shown in example.

The explanation in the above-mentioned maximum strain direction about the first pressure sensitivity layer 42 is applied equally to the second pressure sensitivity layer, and (figure is not Show), according to the specific stepped construction of pressure-sensing input unit 40, during by identical pressing force, the first pressure sensitivity layer 42 and second The maximum strain direction in the corresponding region of pressure sensitivity layer is usually identical.

Whether length axis direction is had according to the first pressure sensitivity unit 421 and the second pressure sensitivity unit in the present invention, It is directive pressure sensitivity unit or direction-free pressure by the first pressure sensitivity unit 421 and the second pressure sensitivity dividing elements Feel unit, wherein, the directive pressure sensitivity unit is the pressure sensitivity unit with length axis direction, and described non-directional Pressure sensitivity unit be the pressure sensitivity unit without length axis direction.

Fig. 6 A-6B are please referred to, the first pressure sensitivity unit 421 is oval around threadiness in fourth embodiment of the invention, wherein, first The long axis direction of pressure sensitivity unit 421 for a directions (i.e. the first pressure sensitivity unit 421 along a directions total projection length La maximum), short axle Direction is b directions (i.e. the first pressure sensitivity unit 421 is minimum along the total projection length Lb in b directions), in one embodiment, a directions and b Direction is vertical.

With above-mentioned oval maximum towards the total projection length on a directions around the first linear pressure sensitivity unit 421, and towards b side Upward total projection length is minimum, in pressing, is more than in the dependent variable towards on a directions towards the dependent variable on b directions, in this way, Upper body in one direction can be concentrated by being conducive to strain caused by the pressing active force being applied on the first pressure sensitivity unit 421 It is existing, so as to make the deformation bigger of the first pressure sensitivity unit 421.It is concentrated due to the first pressure sensitivity unit 421 and shape occurs in a single direction Become, therefore the resistance value RFn of the first pressure sensitivity unit 421 can be made compared to the variation bigger that original state occurs, so as to more precisely Embody the size of pressing dynamics in ground.

Further, since the first pressure sensitivity unit 421 for ellipse around threadiness, in a unit area, the first pressure sensitivity unit 421 Pattern density compared to single strip threadiness pattern density bigger, therefore, when being pressed by finger, the first pressure sensitivity unit 421 deformation bigger, therefore the first pressure sensitivity unit 421 is to the sensitivity higher of pressure detection.

Fig. 6 C are please referred to, the first pressure sensitivity unit 421 has other variant embodiment：A wherein variant embodiment with Above-mentioned first variant embodiment difference lies in the first pressure sensitivity unit 421c be polyline shaped, the first pressure sensitivity unit 421c polyline shapeds Pattern total projection length towards a direction is maximum, and the direction is a directions, and the first pressure sensitivity unit 421c polyline shapeds pattern is towards a side To total projection length it is minimum, the direction is b directions, wherein, a directions are vertical with b directions.The a of first pressure sensitivity unit 421c Direction is the long axis direction of the first pressure sensitivity unit 421c, and the b directions of the first pressure sensitivity unit 421c are the first pressure sensitivity unit 421c's Short-axis direction.

First pressure sensitivity unit 421c is more than in the dependent variable towards on a directions towards on b directions after depressed active force Dependent variable, in this way, one can be concentrated on by being conducive to strain caused by the pressing force being applied on the first pressure sensitivity unit 421c It is embodied on a direction, so as to make the deformation bigger of the first pressure sensitivity unit 421c, so as to more accurately embody the size of pressing dynamics.

In the variant embodiment of above-mentioned pressure sensitivity unit, ellipse, because conducting wire major part section is circular arc, is being made around threadiness It is easier to make in journey, and less easy damaged, there is stronger practicability.

The shape of first pressure sensitivity unit 421 can also be other threadiness such as：Curve-like (the first pressure sensitivity unit in such as Fig. 6 D 421d), isometric multi-stage series linear (the first pressure sensitivity unit 421e in such as Fig. 6 E), Length discrepancy multi-stage series threadiness (such as Fig. 6 F In the first pressure sensitivity unit 421f) or Back Word molded line shape (the first pressure sensitivity unit 421g in such as Fig. 6 G) shape.Above-mentioned first The deformation of the pattern form of pressure sensitivity unit 421 can equally be well applied to the other embodiment in the present invention.It is above-mentioned to be directed to the first pressure sensitivity The various restrictions and its deformation of 421 pattern form of unit are suitable for the second pressure sensitivity unit (not shown).

In the present invention above-mentioned second to fourth embodiment, when the stepped construction of a complete pressure-sensing input unit And after the material of each layer determines, the strain value of each layer structure and pressure-sensing input unit are whole in pressure-sensing input unit What the thickness relationship of structure was also to determine, i.e. the quantity of the integrally-built neutral surface of pressure-sensing input unit and its specific position Put what is be equally to determine, such as the laminating layer and base by adjusting pressure-sensing input unit in second, third embodiment of the invention The Young's modulus and thickness of plate, so as to so that neutral surface is located at or is not located in substrate.

In the present invention, the material for forming the first pressure sensitivity unit and the second pressure sensitivity unit is pressure drag material, the pressure Resistance material is transparent conductive material, is included but is not limited to：Tin indium oxide (Indium Tin Oxide, ITO), tin-antiomony oxide (Antimony Doped Tin Oxide, ATO), indium zinc oxide (IndiumZinc Oxide, IZO), zinc oxide aluminum (Aluminum Zinc Oxide, AZO), gallium oxide zinc (Gallium Zinc Oxide, GZO), indium gallium zinc (Indium Gallium Zinc Oxide, IGZO) etc. the similar gold such as transparent metal oxide or nickel nano wire, Pt nanowires, nano silver wire Belong to the transparent conductive materials such as nano wire or poly- 3,4-rthylene dioxythiophene (PEDOT), graphene, metal grill or carbon nanotube In it is one or more.

Wherein, the lattice that metal grill is made of lametta, metal grill can be according to the shapes of lattice It is divided into direction-free metal grill and directive metal grill, direction-free metal grill refers to the net of metal grill The total projection length of lametta of the grid pattern in any two mutually perpendicular direction is identical；And directive metal grill Be then there is maximum lametta along a direction total projection length (optimal scheme be the directive lattice i.e. To have the total projection length of maximum lametta along a direction, and have along the direction vertical with the direction shortest thin The total projection length of metal wire).

Direction-free metal grill can include combining the lattice formed by a plurality of at least one grid cells, And the total projection length of the lametta in any two mutually perpendicular direction of the lattice is identical.

The lattice of metal grill as shown in Figure 7A includes a plurality of identical square net units, by pros The total projection length of lametta in any two mutually perpendicular direction of the lattice of shape grid cell composition is identical, because This, which is direction-free pattern.

The lattice of metal grill as shown in fig.7b includes two kinds of grid cells again, and one of which grid cell is Circle, another grid cell are quadrangle star, and in the present embodiment, the lattice is by roundness mess unit and quadrangle star Shape grid cell is arranged alternately, and appointing for the lattice formed is combined by roundness mess unit and quadrangle star grid cell The total projection length of lametta in two mutually perpendicular directions of anticipating is identical, therefore the lattice is also direction-free figure Case.

The lattice of directive metal grill is with long along total projection of a direction with maximum lametta Degree.Such as：

The lattice of metal grill as shown in fig. 7c is made of a plurality of identical hexagonal mesh units, the net Grid pattern has a long axis direction, has the total projection length of maximum lametta on the long axis direction of the lattice, then Metal grill with the lattice is directive metallic mesh material, and the length of the lattice of the metal grill Axis direction is the c directions of metal grill in Fig. 7 C.

Metal grill as shown in Figure 7 D is arranged by a plurality of identical network unit rules and is formed, and the diamond shape is most The angle of small apex angle is less than 90 °, which has a long axis direction, the then grid chart formed by the network unit There is the total projection length of maximum lametta, then the metal grill with the lattice is by side on the long axis direction of case The metallic mesh material of tropism, and the long axis direction of the lattice of the metal grill is metal mesh as shown in Figure 7 D The c directions of lattice.

The lattice of metal grill as shown in figure 7e is by a plurality of quadrilateral mesh units and hexagonal mesh list First laterally to be arranged alternately to be formed, which has a long axis direction, has maximum on the long axis direction of the lattice The total projection length of lametta, the metal grill with the lattice is directive metallic mesh material, and described The long axis direction of the lattice of metal grill is the c directions of the metal grill shown in Fig. 7 E.

As illustrated in fig. 7f, the lattice of the metal grill is formed by the grid cell of a plurality of irregular shapes, The lattice has a long axis direction, and the total projection on the long axis direction of the lattice with the lametta of maximum is long Degree, therefore, the metal grill with the lattice is the metallic mesh material by directionality, and the grid of the metal grill The long axis direction of pattern is the c directions of the metal grill shown in Fig. 7 F.

It please refers to Fig. 8 A, includes at least a substrate 51 in fifth embodiment of the invention pressure-sensing input unit 50, first Pressure sensitivity layer 52 is arranged on the upper surface of substrate 51, and the lower surface of substrate 51 is equipped with second with the 52 corresponding setting of the first pressure sensitivity layer Pressure sensitivity layer 53, wherein, the first pressure sensitivity layer 52,51 and second pressure sensitivity layer 53 of substrate integral thickness be T.First pressure sensitivity layer 52 and Two pressure sensitivity layers 53 respectively include at least one first pressure sensitivity unit 521 and at least one second pressure sensitivity unit 531, the first pressure sensitivity list 521 and second pressure sensitivity unit 531 of member is identical with above-mentioned fourth embodiment, and details are not described herein.

Please refer to Fig. 8 B, when each layer structure of complete pressure-sensing input unit residing for pressure-sensing input unit 50 with After material determines, during depressed active force, each layer structure of pressure-sensing input unit and its corresponding strain trend relationship It is just to determine, only chooses strain-thickness relationship line of pressure-sensing input unit 50 (abscissa of thickness T is n-m) herein, Wherein, corresponding first pressure sensitivity layer 52 is located at the thickness position in pressure-sensing input unit 50 at n, and the second pressure sensitivity is then corresponded at m Thickness position of the layer 53 in pressure-sensing input unit 50 is (because the first pressure sensitivity layer 52 and the second pressure sensitivity layer 53 are relative to substrate Thickness it is smaller, only represented herein with a point).

Fig. 8 C-8D represent the Strain Distribution of each pressure sensitivity unit position substantially on 50 substrate 51 of pressure-sensing input unit The maximum strain direction of arrow direction in direction, wherein Fig. 8 C substantially at this, and the arrow direction in Fig. 8 D substantially should The minimum strain direction at place.

It is fifth embodiment of the invention pressure-sensing input unit as shown in VI of strain-thickness relationship line in Fig. 8 B 50 the first variant embodiment：When a neutral surface of pressure-sensing input unit 50 is located in substrate 51, the first pressure sensitivity The strain of unit 521 is negative strain (being compressive state), and the strain of the second pressure sensitivity unit 531 (as stretches shape for normal strain State).In order to make the strain differential Δ ε biggers between the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531, preferably make the first pressure It is maximum to feel the dependent variable absolute value of unit 521 and the dependent variable absolute value of the second pressure sensitivity unit 531.

First pressure sensitivity unit 521 and the second pressure sensitivity unit 531 have a long axis direction according to its pattern form, in the long axis There is the longest total projection length of the pattern form of the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 on direction.

It, can be by adjusting in order to improve the dependent variable of the dependent variable of the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 The long axis direction maximum strain side with its region respectively of the long axis direction of one pressure sensitivity unit 521, the second pressure sensitivity unit 531 To parallel or only into the angle of a very little, so as to fulfill the strain between the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 The adjustment of poor Δ ε value sizes.In some preferably embodiment, the institute of the 521 corresponding setting of the first pressure sensitivity unit The shape for stating the second pressure sensitivity unit 531 differs.

Define the maximum strain direction of 521 region of long axis direction and the first pressure sensitivity unit of the first pressure sensitivity unit 521 The angled а 1 of angle.The long axis direction for the second pressure sensitivity unit 531 being correspondingly arranged with the first pressure sensitivity unit 521 and its location The angled а 2 of angle in the maximum strain direction in domain, wherein, the angle of angle а 1 and angle a2 without directionality, i.e., in the range of 0°-90°.In the present embodiment, angle a1 and angle а 2 are preferably 0 ° -45 °, can be also 0 ° -20 °, also may further be 0 ° - 10 °, it is optimal be 0 ° (i.e. the long axis direction of the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 respectively with the two region Maximum strain direction is arranged in parallel).

When the long axis direction of the first pressure sensitivity unit 521 is identical with the maximum strain direction of the first pressure sensitivity layer 52, can be made The dependent variable maximum absolute value of one pressure sensitivity unit 521；When the long axis direction of the second pressure sensitivity unit 531 and the second pressure sensitivity layer 53 most When should change direction identical greatly, the dependent variable maximum absolute value of the second pressure sensitivity unit 531 can be made.In the first pressure sensitivity unit 521 and The strain of two pressure sensitivity units 531 for one positive one it is negative under the premise of, the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 can be made Strain differential Δ ε obtains higher value.

In the present embodiment, the figure arrangement mode of the first pressure sensitivity layer 52 and the second pressure sensitivity layer 53 is substantially such as Fig. 8 C institutes Show.I.e. the arrow direction is also expressed as a directions of the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 simultaneously.

In other variant embodiment, when 50 overall structure of pressure-sensing input unit has only one neutrality Face, and positioned at substrate 51 mechanics median plane when, the dependent variable of the first pressure sensitivity unit and the dependent variable of the second pressure sensitivity unit are absolute Value reaches maximum value, then the strain differential Δ ε of the two is maximum.As strain-thickness relationship curve in Fig. 8 B V at and shown in VII： (i.e. strain stress ＇=0 and strain stress ＂=0 when there is no any one neutral surface to be located in substrate 51 in pressure-sensing input unit 50 Plane is not in substrate 51), and be located on or below substrate 51 with 51 hithermost neutral surface of substrate, it will determine the first pressure The strain of sense unit 521 and the strain of the second pressure sensitivity unit 531 are all negative strain or are all normal strain.

It is the second deformation implementation side of fifth embodiment of the invention pressure-sensing input unit 50 as shown in V in Fig. 8 B Formula：When the strain and the strain of the second pressure sensitivity unit 531 of the first pressure sensitivity unit 521 are all negative strain, in order to make the first pressure sensitivity list The 521 and second strain differential Δ ε biggers between pressure sensitivity unit 531 of member, need to make the dependent variable absolute value of the first pressure sensitivity unit compared with Greatly, the dependent variable absolute value for making the second pressure sensitivity unit is smaller, in this way, the strain differential Δ ε of the two is larger.

And in order to improve the dependent variable absolute value of the first pressure sensitivity unit 521, the long axis direction of the first pressure sensitivity unit 521 and its The angle a1 of the angle in the maximum strain direction of region is chosen as 0 ° -45 °, can also be 0 ° -20 °, also may further be 0 ° - It is 10 °, optimal to be 0 ° (i.e. the long axis direction of the first pressure sensitivity unit 521 is parallel with the maximum strain direction of its region respectively sets It puts)；In order to reduce the dependent variable absolute value of the second pressure sensitivity unit 531, long axis direction and its location of the second pressure sensitivity unit 531 The angle a2 of the angle in the maximum strain direction in domain then be preferably 45 ° -90 °, can also be 70 ° -90 °, also may further be 80 ° - 90 °, optimal is 90 ° (i.e. the long axis direction of the second pressure sensitivity unit 531 is vertically arranged with the maximum strain direction of its region).

As shown in Fig. 8 C-8D, in the second variant embodiment of the 5th embodiment, the figure row of the first pressure sensitivity layer 52 Substantially as shown in Figure 8 C, and the figure arrangement mode of the second pressure sensitivity layer 53 is substantially as in fig. 8d mode for cloth, i.e. Fig. 8 C, Fig. 8 D Arrow direction is also expressed as a directions of the first pressure sensitivity unit 521, the second pressure sensitivity unit 531 simultaneously.

Since under the effect of identical pressing force, pressure sensitivity unit is by identical stress, and the reality of pressure sensitivity unit should The size of change is related with the total projection length scale in its pattern form, material character and set pattern towards a, b direction.Cause This, can also be by adjusting first except through adjusting except the long axis direction of pressure sensitivity unit and the angle in maximum strain direction The pattern form of pressure sensitivity unit 521 and the second pressure sensitivity unit 531 of corresponding setting, it is specific as follows：

The pattern form of first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 is set as differing, and pattern form should Meet following relationship：

L_{Upper a}/L_{Upper b}>L_{Lower a}/L_{Lower b}

Wherein, L_{Upper a}It is expressed as the total projection length towards a directions of the first pressure sensitivity unit 521, L_{Upper b}It is expressed as the first pressure sensitivity list The total projection length towards b directions of member 521, L_{Lower a}It is expressed as the total projection length towards a directions of the second pressure sensitivity unit 531, L_{Lower b}Table It is shown as the total projection length towards b directions of the second pressure sensitivity unit 531.

By adjusting between the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 towards the total projection length in a directions with towards b The relationship of the ratio of the total projection length in direction, so as to make the strain facies of the first pressure sensitivity unit 521 compared with the second pressure sensitivity unit 531 It focuses more on a direction, so as to obtain the dependent variable of bigger.Then when the strain of the first pressure sensitivity unit 521 and the second pressure sensitivity list When the strain of member 531 is all negative strain, the strain differential Δ ε of bigger can be obtained.

It is the third variant embodiment of fifth embodiment of the invention pressure-sensing input unit 50 as shown in VII：When The strain and the strain of the second pressure sensitivity unit 531 of first pressure sensitivity unit 521 are all normal strain, in order to make the first pressure sensitivity unit 521 Strain differential Δ ε biggers between the second pressure sensitivity unit 531 need to make the dependent variable absolute value of the first pressure sensitivity unit 521 smaller, And make the dependent variable absolute value of the second pressure sensitivity unit 531 larger, in this way, the strain differential Δ ε of the two is larger.

This variant embodiment and above-mentioned second variant embodiment difference lies in：

The angle a1 of the long axis direction of (1) first pressure sensitivity unit 521 and the angle in the maximum strain direction of its region Preferably 45 ° -90 °, it can be also 70 ° -90 °, also may further be 80 ° -90 °, optimal is 90 ° of (i.e. first pressure sensitivity units 521 Long axis direction and the maximum strain direction of its region are vertically arranged)；And the long axis direction of the second pressure sensitivity unit 531 and its institute The maximum strain direction in region angle angle a2 then be preferably 0 ° -45 °, can also be 0 ° -20 °, also may further be 0 ° - It is 10 °, optimal to be 0 ° (i.e. the long axis direction of the second pressure sensitivity unit 531 is parallel with the maximum strain direction of its region respectively sets It puts).In the present embodiment, the figure arrangement mode of the first pressure sensitivity layer 52 as in fig. 8d, and the figure of the second pressure sensitivity layer 53 As shown in Figure 8 C, i.e. Fig. 8 C, Fig. 8 D arrow directions are also expressed as the first pressure sensitivity unit 521 and the second pressure sensitivity to arrangement mode simultaneously The a directions of unit 531.

The pattern form of (2) first pressure sensitivity units 521 and the second pressure sensitivity unit 531 is set as differing, and pattern form Following relationship should be met：

L_{Upper a}/L_{Upper b}＜ L_{Lower a}/L_{Lower b}

Other contents are identical with above-mentioned second variant embodiment, and details are not described herein.With reference to above two adjustment mode, When the strain and the strain of the second pressure sensitivity unit 531 of the first pressure sensitivity unit 521 are all normal strain, the strain of bigger can be obtained Poor Δ ε.

In the 5th embodiment, it is the first pressure sensitivity unit 521 and the material of the second pressure sensitivity unit 531 according to metal grill Material, then may be used the lattice of direction-free metal grill, can also use directive metal grill pattern, and When using directive metal grill pattern, the first pressure sensitivity unit 521 need to be made to use the c of the lattice of metal grill Direction is consistent with a directions of the first pressure sensitivity unit 521, and the second pressure sensitivity unit 531 uses the c of the lattice of metal grill Direction is consistent with a directions of the second pressure sensitivity unit.

One pressure-sensing input unit 60, Fig. 8 C and Fig. 8 D are provided in another variant embodiment in the 5th embodiment Can also further indicate that each pressure sensitivity unit position on 60 substrate of pressure-sensing input unit (non-label) substantially answer variation Arrow direction substantially the first pressure sensitivity unit 621 or 631 region of the second pressure sensitivity unit in cloth direction, wherein Fig. 8 C are most It should change direction greatly, and the minimum strain direction in the substantially described region of the arrow direction in Fig. 8 D.

The pressure-sensing input unit 60 and fifth embodiment of the invention difference lies in：First pressure sensitivity unit 621 with Second pressure sensitivity unit 631 itself does not have a directionality (such as square or other non-directional shapes), and the first pressure sensitivity unit 621 With the second pressure sensitivity unit 631 used in material to have directive metal grill.By adjusting the first pressure sensitivity unit of formation 621 and/or second pressure sensitivity unit 631 metal grill long axis direction, also can be to the first pressure sensitivity unit 621 and the second pressure sensitivity list The adjustment of strain differential Δ ε value sizes between member 631.

The first pressure sensitivity unit 621 is formed with the second pressure sensitivity unit 631 by a metal grill, the metal mesh Lattice are formed by lametta in the form of lattice.The lattice of the directive metal grill of tool has long axis side To and short-axis direction.The lattice of its directive metal grill of tool is to have maximum thin metal along a direction The total projection length of line, the direction are the long axis direction of the lattice and are expressed as c directions.The tool is directive The lattice of metal grill has the total projection length of minimum lametta along a direction, and the direction is the lattice Short-axis direction and be expressed as e directions.Wherein, the c directions are vertically arranged with the e directions.In pressing, towards c directions On dependent variable be more than towards the dependent variable on e directions.The c directions of the first pressure sensitivity unit 621 and the maximum of its region Answer the angled d1 of nyctitropic angle, the c directions of the first pressure sensitivity unit 631 and the maximum strain direction of its region The angled d2 of angle.Wherein, the first pressure sensitivity unit is correspondingly arranged with the second pressure sensitivity unit, angle d1 and angle d2's Angle does not have directionality, i.e., in the range of 0 ° -90 °.

The metal mesh of the lattice of the metal grill of the first pressure sensitivity unit 621 and the second pressure sensitivity unit 631 The lattice and its long axis direction of lattice differ.

Since neutral surface is located at the different location of the pressure-sensing device 60, present embodiment can also be further divided into as Under several situations：

(1) when neutral surface is located in substrate (not shown), the strain of the first pressure sensitivity unit 621 is negative strain, and second presses The strain for feeling unit 631 is normal strain.In order to make the strain differential Δ between the first pressure sensitivity unit 621 and the second pressure sensitivity unit 631 ε biggers, preferable embodiment are the strains of the dependent variable absolute value and the second pressure sensitivity unit 631 that make the first pressure sensitivity unit 621 It is maximum to measure absolute value, then needs that the angle d1 and angle d2 is made to be preferably 0 ° -45 °, can be also 0 ° -20 °, may be used also It it is further 0 ° -10 °, optimal is 0 °.And when angle d1 and angle d2 are 0 °, the first pressure sensitivity unit 621 and second can be made The dependent variable absolute value of pressure sensitivity unit 631 is maximum, i.e. the arrow direction of Fig. 8 C and Fig. 8 D difference stress areas also represents simultaneously In the stress area, to form the lattice of the metal grill of the first pressure sensitivity unit 621 and forming the second pressure sensitivity unit 631 Metal grill lattice c directions.When there is no any one neutral surface to be located at base in the pressure-sensing input unit 60 When in plate (not shown), it is located on or below substrate with the hithermost neutral surface of substrate, will determines the first pressure sensitivity unit 621 Strain and the strain of the second pressure sensitivity unit 631 are all negative strain or are all normal strain, can further comprise following deformation implementation side Formula：

(2) when the strain of the first pressure sensitivity unit 621 and the strain of the second pressure sensitivity unit 631 are all negative strain, in order to make Strain differential ε biggers between first pressure sensitivity unit 621 and the second pressure sensitivity unit 631 need the strain for making the first pressure sensitivity unit 621 It is larger to measure absolute value, it is therefore desirable to c1 directions and its institute of the lattice of the metal grill of the first pressure sensitivity unit 621 will be formed Angle d1 in the maximum strain direction in region is chosen as 0 ° -45 °, can be also 0 ° -20 °, also may further be 0 ° -10 °, optimal For 0 ° (being arranged in parallel)；And in order to reduce the absolute value of 631 dependent variable of the second pressure sensitivity unit, form the second pressure sensitivity unit 631 The angle d2 in maximum strain direction of c1 directions and its region of lattice of metal grill be preferably 45 ° -90 °, It can be also 70 ° -90 °, also may further be 80 ° -90 °, optimal is 90 °.I.e. such as stress areas different as shown in Fig. 8 C, Fig. 8 D Arrow direction is also denoted as being formed the lattice of the metal grill of the first pressure sensitivity unit 621 and forms the second pressure sensitivity unit The c directions of the lattice of 631 metal grill.

In another preferably variant embodiment, the gold of the first pressure sensitivity unit 621, the second pressure sensitivity unit 631 is formed Belonging to the shape of the lattice of grid can also further meet following relationship：

L_c1/L_e2>L_c2/L_e2

Wherein, L_c1It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin metal in the c directions The total projection length of line, L_d1It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin gold in the e directions Belong to the total projection length of line, L_c2It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin of the c directions The total projection length of metal wire, L_d2It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the e directions The total projection length of lametta.

(3) when the strain of the first pressure sensitivity unit and the strain of the second pressure sensitivity unit are all normal strain, in order to make the first pressure sensitivity Strain differential ε biggers between unit and the second pressure sensitivity unit, the dependent variable absolute value that need to make the first pressure sensitivity unit is smaller, and makes The dependent variable absolute value of two pressure sensitivity units is larger, in this way, the strain differential ε of the two is larger.

Above-mentioned variant embodiment (two) and above-mentioned variant embodiment (three) difference lies in：Form the first pressure sensitivity unit Metal grill lattice c directions and its region maximum strain direction angle angle d1 be preferably 45 °- 90 °, it can be also 70 ° -90 °, also may further be 80 ° -90 °, optimal is 90 ° (being vertically arranged)；And the second pressure sensitivity unit The angle d2 of long axis direction and the angle in the maximum strain direction of its region is preferably then 0 ° -45 °, can also be 0 ° -20 °, 0 ° -10 ° are also may further be, optimal is 0 ° (being arranged in parallel).The arrow of different stress areas i.e. as shown in Fig. 8 C, Fig. 8 D Direction is also denoted as being formed the lattice of the metal grill of the second pressure sensitivity unit 631 and forms the first pressure sensitivity unit 621 The c directions of the lattice of metal grill.

The pattern form of first pressure sensitivity unit and the second pressure sensitivity unit of corresponding setting differs, and pattern form should Meet following relationship：

L_c1/L_e1＜ L_c2/L_e2

Wherein, L_c1It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin metal in the c directions The total projection length of line, L_d1It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin gold in the e directions Belong to the total projection length of line, L_c2It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin of the c directions The total projection length of metal wire, L_d2It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the e directions The total projection length of lametta.Other contents are identical with above-mentioned variant embodiment (two), and details are not described herein.

In the above embodiment (two) and (three), in addition to adjustment the first pressure sensitivity of stroke unit 621 and the second pressure sensitivity unit 631 Metal grill long axis direction, further by adjusting the metal grill for forming the first pressure sensitivity unit 621 and the can also be formed Towards the total projection length in c directions and the lametta towards e directions between the lattice of the metal grill of two pressure sensitivity units 631 The ratio relation of total projection length, so as to make the strain facies of the first pressure sensitivity unit 621 in pattern-free direction compared with similary pattern-free The second pressure sensitivity unit 631 in direction is focused more under the influence of it has directive metallic mesh material on a direction, So as to obtain the dependent variable of bigger.

In some more preferably embodiment, the different zones positioned at the first pressure sensitivity layer are (in as shown in Figure 5 A At the heart, diagonal angle, long side midpoint, short side midpoint etc., area distribution is unrestricted herein) form the first pressure sensitivity unit And the material of the second pressure sensitivity unit set corresponding thereto can be to differ, the selection of specific material can be by different zones The factors such as pressure-sensing sensitivity are determined.Such as in a variant embodiment, (the A places in such as Fig. 5 A at center Showing) the first pressure sensitivity unit in region is using having a directive metallic mesh material, and in long side midpoint (C in such as Fig. 5 A Shown in) the first pressure sensitivity unit in region is then using nonmetallic grid material (non-directional), and in diagonal angle region (as schemed In 5A shown in B) the first pressure sensitivity unit then using direction-free metallic mesh material, so as to be inputted in the pressure-sensing The different stress areas of the substrate (not shown) of device 60 can obtain pressure-sensing effect not of the same race.

1st, the present invention provides a kind of pressure-sensing input unit 20 with temperature compensation function, including a feeling of stress Survey input module 21, the pressure-sensing input module 21 include be arranged on 201 upper and lower surface of substrate the first pressure sensitivity unit 202 and Second pressure sensitivity unit 203, the first pressure sensitivity unit 202 and the second pressure sensitivity unit 203 is correspondingly arranged and material identical, at least one first Pressure sensitivity unit 202 and the second pressure sensitivity unit 203 of corresponding setting, two reference resistances (resistance Ra and resistance with peripheral hardware Rb Wheatstone bridge) is formed.

Pressing force value is detected using Wheatstone bridge in the present invention, circuit structure is simple, and control accuracy is high.By In the material identical for forming the first pressure sensitivity unit 202 and the second pressure sensitivity unit 203, therefore, the first pressure sensitivity unit 202 and the second pressure Feel unit 203 since the variation of resistance value caused by temperature change meets (RF0+ Δ RF0)/(RC0+ Δ RC0)=RF0/ RC0, it is seen then that since the first pressure sensitivity unit 202 and the second pressure sensitivity unit 203 for same material and collectively form Wheatstone bridge, In the measurement process of resistance value, temperature can neglect the resistance value influences of the first pressure sensitivity unit 202 and the second pressure sensitivity unit 203 Slightly, therefore the resistance change caused by temperature can be fully compensated in pressure-sensing input module 21 provided by the present invention.

2nd, in pressure-sensing input unit 20 provided by the present invention, the Young's modulus of substrate 201 and laminating layer 22, thickness The neutral surface of pressure-sensing input unit 20 is influenced, when neutral surface is located in substrate 201, is arranged on substrate main table about 201 Strain differential between the first pressure sensitivity unit 211 and the second pressure sensitivity unit 212 in face can reach maximum value.Therefore, by substrate 201 Young's modulus be set greater than under the premise of at least one order of magnitude of Young's modulus of laminating layer 22：(1) by the poplar of laminating layer 22 The control of family name's modulus is conducive to increase above-mentioned strain differential Δ ε in the range of 100-3000MPa；(2) thickness of laminating layer 22 is limited When being scheduled in 25-125 μ ms, strain differential Δ ε will be with the reduction of 22 thickness of laminating layer and in increase tendency；(3) by substrate When 201 thickness limit is in 50-450 μ ms, strain differential Δ ε will be with the increase of 201 thickness of substrate and in increase tendency. Therefore, by adjusting the Young's modulus and its thickness of the substrate 201 of pressure-sensing input unit 20 and laminating layer 22, you can increase The strain difference of the pressure sensitivity unit of 201 upper and lower surface of substrate, so as to make pressure size detection more accurate, pressing dynamics detect more Add sensitive.

3rd, in pressure-sensing input unit 40 provided by the present invention, the first pressure sensitivity unit 421 is with the second pressure sensitivity unit With long axis direction and short-axis direction, and the bus length of long axis direction is more than the design of total line length of short-axis direction.At this Also further the pattern form of the first pressure sensitivity unit 421 and the second pressure sensitivity unit is included in invention it is oval around threadiness, polyline shaped, The shapes such as curve-like, isometric multi-stage series threadiness, Length discrepancy multi-stage series threadiness, Back Word molded line shape.When finger pressing (is pressed Pressure) when causing the first pressure sensitivity unit 421 or the second pressure sensitivity unit to generate deformation, the first pressure sensitivity unit 421 or the second pressure sensitivity unit Since the total projection length in long axis a directions is different from the total projection length in short axle b directions, the strain in a directions and b directions is not yet Together, it therefore can effectively increase resistance change effect, further make the response of the first pressure sensitivity layer or the second pressure sensitivity layer to pressure It is more precisely sensitiveer.

4th, in pressure-sensing input unit 60 provided by the present invention, in order to make the visible area of pressure-sensing input unit 60 Domain can also be placed in highly sensitive the first pressure sensitivity unit 621 and the second pressure sensitivity unit 631, in the present invention can be by display layer (branch Support layer) in the first pressure sensitivity unit 621 and the second pressure sensitivity unit 631 of corresponding setting be defined to be formed by metal grill, Metal grill has a variety of lattices, has the lametta along direction maximum by the lattice for making metal grill Total projection length, make the lattice have directionality, so as to obtain directive metallic mesh material.Described in adjustment First pressure sensitivity unit 621, the second pressure sensitivity unit 631 pattern form a directions (long axis direction of pattern form, towards certain One direction has maximum total projection length) the c directions (grid chart of the lattice of the corresponding metallic mesh material The long axis direction of case has the total projection length of maximum lametta towards a direction) relative to the first pressure sensitivity unit 621st, angle angle between the maximum strain direction of 631 region of the second pressure sensitivity unit, and with reference to first pressure sensitivity Unit 621 and the tune of the ratio of the pattern form of the second pressure sensitivity unit 631 and the grid cell of the lattice, size It is whole, so as to make the strain differential bigger of the first pressure sensitivity unit 621 and the second pressure sensitivity unit 631, obtain more preferably pressure-sensing Sensitivity.

5th, in pressure-sensing input unit 50 provided by the present invention, in order to reach answering for above-mentioned first pressure sensitivity unit 521 The difference become between the strain of the second pressure sensitivity unit 531 can reach higher value, so as to improve pressure-sensing input unit 50 Pressure detection sensitivity, except through adjustment the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 pattern form, may be used also With the arrangement mode by adjusting the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531, so as to increase or reduce the first pressure sensitivity list The dependent variable of 521 and second pressure sensitivity unit 531 of member.Wherein, when the strain of the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 For one it is positive one it is negative when, the angular range of angle а 1 and angle a2 are 0 ° -45 °, when strain is all negative strain, angle a1 for 0 ° - 45 °, and angle a2 is 45 ° -90 ° or when strain is all normal strain, angle a1 is 45 ° -90 °, and angle a2 is 0 ° -45 °. In addition, in order to make the strain differential Δ ε between the first pressure sensitivity unit 521 and the second pressure sensitivity unit 531 larger, it can also be by first The pattern form relationship of 521 and second pressure sensitivity unit 531 of pressure sensitivity unit is defined.The limitation of above-mentioned condition can all make first The strain variation value of 521 and second pressure sensitivity unit 531 of pressure sensitivity unit is maximum.First pressure sensitivity unit 521 is in depressed active force Later, it is more than in the dependent variable towards on a directions towards the dependent variable on b directions, in this way, being conducive to be applied to the first pressure sensitivity unit 521 and the second pressing force on pressure sensitivity unit 531 caused by strain can concentrate it is upper in one direction embody, when this strain When the direction of concentration is consistent with the maximum strain direction that the region is generated due to pressing active force, the first pressure sensitivity unit can be made 521 and second pressure sensitivity unit 531 strain differential Δ ε biggers, so as to more accurately embody pressing dynamics size, improve pressure The sensitivity of detecting.

6th, the pressure-sensing input unit 60 in the present invention, is sensed using resistive pressure, passes through pressure sensitivity unit (first Pressure sensitivity unit 621 and the second pressure sensitivity unit 631) internal shape change causes corresponding change in resistance, so as to be become according to resistance value Change generate position and variable quantity size come judge press points position and pressing strength size, using same pressure sensitivity unit both into Row position detection (planar) and the calculating for carrying out strength detection (third dimension) detect while realizing three dimensionality.

The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, it is all the present invention principle it Interior made any modification, equivalent replacement and improvement etc. should all be included in the protection scope of the present invention.

Claims

A 1. pressure-sensing input unit, which is characterized in that including：

One cover board；

One supporting layer；

One pressure-sensing input module, is set between the cover board and the supporting layer, the pressure-sensing input module packet It includes a substrate and is separately positioned on one first pressure sensitivity layer of the substrate upper and lower surface, one second pressure sensitivity layer, the first pressure sensitivity layer Including at least one first pressure sensitivity unit, the second pressure sensitivity layer includes at least one second pressure sensitivity unit, first pressure sensitivity Unit is arranged in a one-to-one correspondence with the second pressure sensitivity unit and material identical；

It is engaged between the cover board and the pressure-sensing input module with the first laminating layer, the pressure-sensing input module It is engaged between the supporting layer with the second laminating layer；Wherein

The Young's modulus of the substrate and first laminating layer, the second laminating layer Young's modulus than being more than 10.
2. pressure-sensing input unit as described in the appended claim 1, it is characterised in that：First laminating layer, the second laminating layer Young's modulus be 100-3000MPa.
3. pressure-sensing input unit as described in the appended claim 1, it is characterised in that：First laminating layer, the second laminating layer Thickness be 25-125 μm.
4. pressure-sensing input unit as described in the appended claim 1, it is characterised in that：The thickness of the substrate is 50-450 μm.
5. pressure-sensing input unit as described in the appended claim 1, it is characterised in that：First pressure sensitivity unit and the second pressure sensitivity unit The area of pattern form is 25mm²To 225mm²。
6. pressure-sensing input unit as described in the appended claim 1, it is characterised in that：At least one first pressure sensitivity unit and its The second pressure sensitivity unit being correspondingly arranged forms the two of which resistance of Wheatstone bridge, is used to detect a pressing dynamics size, Compensate pressure-sensing input module resistance change caused by temperature simultaneously.
7. pressure-sensing input unit as described in the appended claim 1, it is characterised in that：The pressure-sensing input module is further Including the first reference resistance and the second reference resistance, at least one first pressure sensitivity unit and the second pressure sensitivity being correspondingly arranged Unit forms Wheatstone bridge.
8. pressure-sensing input unit as recited in claim 7, it is characterised in that：It is described form Wheatstone bridge mode be The first pressure sensitivity unit is connected with first reference resistance, the second pressure sensitivity unit being correspondingly arranged and the described second ginseng Examine resistance series connection.
9. pressure-sensing input unit as recited in claim 7, it is characterised in that：It is described form Wheatstone bridge mode be The first pressure sensitivity unit is connected with the second pressure sensitivity unit being correspondingly arranged, first reference resistance and the described second ginseng Examine resistance series connection.
10. pressure-sensing input unit as described in the appended claim 1, it is characterised in that：The first pressure sensitivity unit is set in array The upper surface of base plate is placed in, then the pressure-sensing input module can detect three dimensional signal simultaneously.
11. pressure-sensing input unit as described in the appended claim 1, it is characterised in that：The pressure-sensing input unit by Integrally there is at least one neutral surface after pressing deformation, the strain of the neutral surface is 0.
12. pressure-sensing input unit as claimed in claim 11, it is characterised in that：At least one neutral surface is wherein One of be located in the substrate, i.e., the strain of described first pressure sensitivity unit is negative strain, and the strain of the second pressure sensitivity unit is Normal strain.
13. pressure-sensing input unit as claimed in claim 12, it is characterised in that：The neutral surface in the substrate is Unique neutral surface of the pressure-sensing input unit, and positioned at the mechanics median plane of the substrate.
14. pressure-sensing input unit as claimed in claim 11, it is characterised in that：At least one neutral surface it is arbitrary One of be not located in the substrate, i.e., the strain and the strain of the second pressure sensitivity unit of described first pressure sensitivity unit are all negative Strain or normal strain.
15. the pressure-sensing input unit as described in claim 13 or 14, it is characterised in that：The first pressure sensitivity unit and institute The second pressure sensitivity unit is stated to be bent in the form of a conducting wire by a pressure drag material.
16. pressure-sensing input unit as claimed in claim 15, it is characterised in that：The pressure drag material includes indium oxide Tin, tin-antiomony oxide, indium zinc oxide, zinc oxide aluminum, gallium oxide zinc, indium gallium zinc, nickel nano wire, Pt nanowires, nano silver wire, It is one or more in poly- 3,4- ethene dioxythiophenes, graphene or carbon nanotube.
17. pressure-sensing input unit as claimed in claim 14, it is characterised in that：The first pressure sensitivity unit and/or institute The design for stating the second pressure sensitivity unit is maximum for total projection length towards a direction, and the direction is the first pressure sensitivity unit And/or a directions of the second pressure sensitivity unit, the pattern of the first pressure sensitivity unit and the second pressure sensitivity unit is towards a direction Total projection length it is minimum, the direction is b directions, wherein, a directions are vertical with the b directions.
18. the pressure-sensing input unit as described in claim 17, it is characterised in that：The first pressure sensitivity unit and described the The pattern form of two pressure sensitivity units includes oval around threadiness, polyline shaped, curve-like, isometric multi-stage series threadiness, Length discrepancy multistage A kind of or combination of series connection threadiness or Back Word molded line shape.
19. pressure-sensing input unit as claimed in claim 18, it is characterised in that：It is corresponding described in the first pressure sensitivity unit The shape of second pressure sensitivity unit of setting differs.
20. pressure-sensing input unit as claimed in claim 19, it is characterised in that：The a directions of the first pressure sensitivity unit With the angled а 1 of angle in the maximum strain direction of the first pressure sensitivity unit region, a directions of the second pressure sensitivity unit with The angled а 2 of angle in the maximum strain direction of the second pressure sensitivity unit region；

When strain is a normal strain, a negative strain, the angular range of angle а 1 and angle a2 is 0 ° -45 °；Or

When strain is all negative strain, angle a1 is 0 ° -45 °, and angle a2 is 45 ° -90 °；Or

When strain is all normal strain, angle a1 is 45 ° -90 °, and angle a2 is 0 ° -45 °.
21. the pressure-sensing input unit as described in claim 20, it is characterised in that：

When strain is a normal strain, a negative strain, the angular range of angle а 1 and angle a2 is 0 ° -45 °；Or

When strain is all negative strain, angle a1 is 0 °, and angle a2 is 90 °；Or

When strain is all normal strain, angle a1 is 90 °, and angle a2 is 0 °.
22. pressure-sensing input unit as claimed in claim 19, it is characterised in that：It is described when strain is all negative strain The relationship of first pressure sensitivity unit and the pattern form of the second pressure sensitivity unit is expressed as：

L_{Upper a}/L_{Upper b}>L_{Lower a}/L_{Lower b}

Wherein, L_{Upper a}It is expressed as the total projection length towards a directions of the first pressure sensitivity unit, L_{Upper b}Be expressed as the first pressure sensitivity unit towards b The total projection length in direction, L_{Lower a}It is expressed as the total projection length towards a directions of the second pressure sensitivity unit, L_{Lower b}It is expressed as the second pressure sensitivity The total projection length towards b directions of unit.
23. pressure-sensing input unit as claimed in claim 19, it is characterised in that：It is described when strain is all normal strain The relationship of first pressure sensitivity unit and the pattern form of the second pressure sensitivity unit is expressed as：

L_{Upper a}/L_{Upper b}＜ L_{Lower a}/L_{Lower b}

Wherein, L_{Upper a}It is expressed as the total projection length towards a directions of the first pressure sensitivity unit, L_{Upper b}Be expressed as the first pressure sensitivity unit towards b The total projection length in direction, L_{Lower a}It is expressed as the total projection length towards a directions of the second pressure sensitivity unit, L_{Lower b}It is expressed as the second pressure sensitivity The total projection length towards b directions of unit.
24. the pressure-sensing input unit as described in any one of claim 11-14, it is characterised in that：The first pressure sensitivity list First to be formed with the second pressure sensitivity unit by a metal grill, the metal grill is by lametta in the form of lattice It is formed.
25. the pressure-sensing input unit as described in claim 24, it is characterised in that：The metal grill is directive Metal grill, the lattice of the metal grill is maximum for the total projection length of lametta towards a direction, and the direction is The c directions of the lattice, the total projection of the lametta of the lattice towards a direction is minimum, and the direction is e directions, Wherein, the c directions are vertical with the e directions.
26. pressure-sensing input unit as recited in claim 25, it is characterised in that：The lattice has a long axis side To the c directions of the long axis direction and the lattice.
27. the pressure-sensing input unit as described in claim 26, it is characterised in that：The metal mesh of the first pressure sensitivity unit The lattice of lattice and the lattice and its long axis direction of the metal grill of the second pressure sensitivity unit differ.
28. the pressure-sensing input unit as described in claim 27, it is characterised in that：The grid chart of the first pressure sensitivity unit The angled d1 of angle in the c directions of case and the maximum strain direction of its region, the lattice of the second pressure sensitivity unit C directions and its region maximum strain direction the angled d2 of angle；

When strain is a normal strain, a negative strain, the angular range of the angle d1 and angle d2 is 0 ° -45 °；Or

When strain is all negative strain, angle d1 is 0 ° -45 °, and angle d2 is 45 ° -90 °；Or when strain is all normal strain, angle It is 45 ° -90 ° to spend d1, and angle d2 is 0 ° -45 °.
29. pressure-sensing input unit as claimed in claim 28, it is characterised in that：

When strain is a normal strain, a negative strain, the angular range of the angle d1 and angle d2 is 0 °；

When strain is all negative strain, angle d1 is 0 °, and angle d2 is 90 °；

Or when strain is all normal strain, angle d1 is 90 °, and angle d2 is 0 °.
30. the pressure-sensing input unit as described in claim 27, it is characterised in that：It is described when strain is all negative strain The lattice of the metal grill of first pressure sensitivity unit and the metal grill of formation the second pressure sensitivity unit, it is specific as follows：

L_c1/L_e1＜ L_c2/L_e2

Wherein, L_c1It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the lametta in the c directions Total projection length, L_e1It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the lametta in the e directions Total projection length, L_c2It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin metal in the c directions The total projection length of line, L_e2It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin gold in the e directions Belong to the total projection length of line.
31. the pressure-sensing input unit as described in claim 27, it is characterised in that：It is described when strain is all normal strain The lattice of the metal grill of first pressure sensitivity unit and the metal grill of formation the second pressure sensitivity unit, it is specific as follows：

L_c1/L_e1>L_c2/L_e2

Wherein, L_c1It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the lametta in the c directions Total projection length, L_e1It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the lametta in the e directions Total projection length, L_c2It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin metal in the c directions The total projection length of line, L_e2It is expressed as being formed the lattice of the metal grill of the first pressure sensitivity unit towards the thin gold in the e directions Belong to the total projection length of line.
32. the pressure-sensing input unit as described in any one of claim 25-31, it is characterised in that：The lattice packet At least one grid cell is included, a plurality of grid cells arrange to form the lattice.
33. pressure-sensing input unit as described in the appended claim 1, it is characterised in that：The supporting layer is a display layer.