CN111554189A - Flexible display device - Google Patents
Flexible display device Download PDFInfo
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- CN111554189A CN111554189A CN202010410735.7A CN202010410735A CN111554189A CN 111554189 A CN111554189 A CN 111554189A CN 202010410735 A CN202010410735 A CN 202010410735A CN 111554189 A CN111554189 A CN 111554189A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present disclosure provides a flexible display device, comprising a flexible display module, a flexible battery module, and a bonding layer bonded between the flexible display module and the flexible battery module; the bonding layer is a composite film layer and comprises at least one bonding glue layer, at least one elastic energy absorption layer and at least one peelable glue layer, wherein the bonding glue layer is arranged in a stacked mode, the elastic energy absorption layer is used for generating elastic deformation to absorb energy, and the peelable glue layer is used for peeling under a preset external condition; one film layer of the first film layer closest to the flexible display module and the second film layer closest to the flexible battery module of the bonding layer is the bonding adhesive layer, and the other film layer of the bonding layer is the bonding adhesive layer or the peelable adhesive layer. The flexible display device provided by the embodiment of the disclosure can integrate the flexible display device and the flexible battery, and can solve the problems that the battery module is large in repair difficulty and damages a screen.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display device.
Background
With the technical maturity of the flexible OLED display being improved, a foldable, rollable and stretchable flexible display product appears, and display forms with higher degrees of freedom, such as curved surface display, spherical surface display, and the like, become a trend. The development of flexible batteries has also been rapidly developed, but in the related art, a module structure in which a flexible display device and a flexible battery are integrally thinned has not been provided. To flexible display device and flexible battery realize integrative frivolous module structure, the problem that faces is: the problem is that the difficulty of repair is increased, such as damage and replacement of a battery, and if the battery and the display module are designed to be light and thin integrally, a whole screen can be reported to be wasted, so that the problem that the repair is easy, in other words, the battery and the display module are easy to detach is a problem to be solved; the second problem is that the volume of the battery expands and contracts when the battery is charged and discharged, so that the display screen is prevented from being damaged by the volume change and the problem to be solved is solved.
Disclosure of Invention
The embodiment of the disclosure provides a flexible display device, which can integrate the flexible display device and a flexible battery and can solve the problems that a battery module is large in repair difficulty and damages a screen.
The technical scheme provided by the embodiment of the disclosure is as follows:
a flexible display device comprises a flexible display module, a flexible battery module and a bonding layer bonded between the flexible display module and the flexible battery module;
the bonding layer is a composite film layer and comprises at least one bonding glue layer, at least one elastic energy absorption layer and at least one peelable glue layer, wherein the bonding glue layer is arranged in a stacked mode, the elastic energy absorption layer is used for generating elastic deformation to absorb energy, and the peelable glue layer is used for peeling under a preset external condition;
and one film layer of the first film layer closest to the flexible display module and the second film layer closest to the flexible battery module of the bonding layer is the bonding adhesive layer, and the other film layer is the bonding adhesive layer or the peelable adhesive layer.
Illustratively, the predetermined external condition includes application of an external force, a temperature change, or light irradiation.
Illustratively, the material of the elastic energy absorbing layer is selected from any one of the following materials:
an elastic energy absorbing material;
the elastic energy-absorbing material and the insulating heat-conducting material are mixed.
Illustratively, the bonding layer comprises only one of the elastic energy absorbing layers;
or the binding layer comprises at least two elastic energy absorption layers, the elastic energy absorption layer is closest to one layer of the flexible display module in the at least two elastic energy absorption layers and is made of elastic energy absorption materials, and the elastic energy absorption layer is closest to one layer of the flexible battery module and is made of mixed materials of elastic energy absorption materials and insulating heat conduction materials.
Illustratively, the peelable glue layer is a single film layer structure;
or the peelable glue layers are composite film layers and at least comprise two glue layers and a medium layer bonded between the two glue layers, the medium layer can be peeled from at least one glue layer of the two glue layers under the preset external condition, and the material of the medium layer is at least one of cycloolefin polymer, polyethylene terephthalate and polyethylene.
For example, the flexible battery module comprises a first face opposite to the flexible display module, a second face opposite to the first face, and a side face located between the first face and the second face, wherein the second film layer of the bonding layer and at least one layer of the elastic energy absorbing layer wrap at least the first face and the side face.
Illustratively, the flexible battery module comprises at least one flexible chip and a flexible packaging layer for packaging the flexible chip, wherein the flexible chip comprises a first flexible electrode, a diaphragm and a second flexible electrode which are sequentially stacked.
Exemplarily, the flexible chip further includes a first current collector disposed on a side of the first flexible electrode away from the second flexible electrode, and a second current collector disposed on a side of the second flexible electrode away from the first flexible electrode.
For example, a plurality of first opening patterns are distributed on the first flexible electrode and the second flexible electrode, and the first opening patterns are hollow structures or elastic buffer materials are filled in the first opening patterns.
Illustratively, the flexible packaging layer is a closed packaging structure which is a whole-layer structure to close the first opening pattern; or the flexible packaging layer is of a hollow packaging structure and is provided with a second opening pattern, and the second opening pattern corresponds to the first opening pattern.
The beneficial effects brought by the embodiment of the disclosure are as follows:
according to the flexible display device provided by the embodiment of the disclosure, the flexible display module and the flexible battery module form an integrated light and thin structure through a bonding layer, the bonding layer is a composite film layer and comprises an elastic energy absorption layer, a peelable glue layer and a bonding glue layer, wherein the elastic energy absorption layer has certain elasticity and can absorb volume expansion and shrinkage changes of the flexible battery module in the charging and discharging processes and caused by various factors, and the flexible display module is prevented from being damaged by the expansion and shrinkage changes; the strippable glue layer is low in viscosity, meets the normal bonding effect and has the characteristic of easy stripping, and the characteristic of easy stripping of the strippable glue layer comprises that the strippable glue layer is easy to strip under the assistance of a preset external condition, so that the flexible display module and the flexible battery module integrated structure can be conveniently repaired and detached, and the flexible display module is not easy to damage.
Drawings
Fig. 1 shows a schematic structural diagram of a flexible display device provided in an embodiment of the present disclosure;
fig. 2 illustrates a schematic structural view of an exemplary embodiment of a bonding layer of a flexible display device provided by the present disclosure;
fig. 3 illustrates a schematic structural view of another exemplary embodiment of a bonding layer of a flexible display device provided by the present disclosure;
fig. 4 shows a schematic structural diagram of another exemplary embodiment of a flexible display device provided by the present disclosure;
fig. 5 is a schematic structural diagram illustrating an exemplary embodiment of a flexible battery module of a flexible display device provided in the present disclosure;
fig. 6 is a schematic structural diagram illustrating an exemplary embodiment of a flexible electrode in a flexible battery module of a flexible display device provided in the present disclosure;
fig. 7 is a schematic structural diagram illustrating another exemplary embodiment of a flexible electrode in a flexible battery module of a flexible display device provided in the present disclosure;
fig. 8 is a schematic structural diagram illustrating another exemplary embodiment of a flexible electrode in a flexible battery module of a flexible display device provided in the present disclosure;
fig. 9 is a schematic structural diagram illustrating another exemplary embodiment of a flexible electrode in a flexible battery module of a flexible display device provided in the present disclosure;
fig. 10 is a schematic structural diagram illustrating another exemplary embodiment of a flexible electrode in a flexible battery module of a flexible display device provided by the present disclosure;
fig. 11 shows a schematic structural diagram of another exemplary embodiment of a flexible display device provided by the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As shown in fig. 1, the flexible display device provided by the embodiment of the present disclosure includes a flexible display module 100, a flexible battery module 200, and a bonding layer 300 bonded between the flexible display module 100 and the flexible battery module 200; the bonding layer 300 is a composite film layer and comprises at least one bonding glue layer 310, at least one elastic energy absorbing layer 320 and at least one peelable glue layer 330, wherein the bonding glue layer 310, the elastic energy absorbing layer 320 and the peelable glue layer are stacked, and the elastic energy absorbing layer is used for generating elastic deformation to absorb energy, and the peelable glue layer 330 is used for being peeled off under a preset external condition; among a first film layer of the bonding layer 300 closest to the flexible display module 100 and a second film layer of the bonding layer closest to the flexible battery module 200, one film layer is the adhesive layer 310, and the other film layer is the adhesive layer 310 or the peelable adhesive layer 330.
According to the flexible display device provided by the embodiment of the disclosure, the flexible display module 100 and the flexible battery module 200 are combined into an integrated light and thin structure through the bonding layer 300, the bonding layer 300 is a composite film layer and comprises an elastic energy absorption layer 320, a peelable glue layer 330 and a bonding glue layer 310, wherein the elastic energy absorption layer 320 has certain elasticity and can absorb volume expansion and contraction changes caused by the flexible battery module 200 in the charging and discharging processes and various factors, and the flexible display module 100 is prevented from being damaged by the expansion and contraction changes; the strippable glue layer 330 has low viscosity, meets the normal bonding effect and has the characteristic of easy stripping, and the easy stripping characteristic of the strippable glue layer 330 comprises that the strippable glue layer 330 is easy to strip under the assistance of preset external conditions, so that the flexible display module 100 and the flexible battery module 200 can be conveniently repaired and detached in an integrated structure, and the flexible display module 100 is not easy to damage.
It should be noted that, in the flexible display device provided in the embodiment of the present disclosure, the bonding layer 300 is a composite film layer, the bonding layer 300 is used for a film layer bonded to the flexible display module 100, that is, the first film layer, and a film layer bonded to the flexible battery module 200, that is, the second film layer, the first film layer and the second film layer should be adhesive film layers, the adhesive layer and the peelable adhesive layer 330 in the bonding layer 300 both have adhesion, and at least one of the bonding layer 300 and the flexible display module 100 and the flexible battery module 200 between them should have relatively high adhesion to ensure firm adhesion, so at least one of the first film layer and the second film layer should be the adhesive layer, and the other film layer should be the adhesive layer or the peelable adhesive layer 330, so as to realize the purpose of bonding and fixing the flexible display module 100 and the flexible battery module 200.
For example, in one embodiment shown in fig. 1, the bonding layer 300 includes an adhesive layer, an elastic energy absorbing layer 320, and a peelable adhesive layer 330, which are sequentially stacked, wherein the adhesive layer is adhered to the flexible display module 100, and the peelable adhesive layer 330 is adhered to the flexible battery module 200;
or, in another embodiment, the bonding layer 300 includes a bonding adhesive layer, the elastic energy absorbing layer 320, and the peelable adhesive layer 330, which are sequentially stacked, wherein the bonding adhesive layer is bonded to the flexible battery module 200, and the peelable adhesive layer 330 is bonded to the flexible display module 100;
alternatively, in another embodiment shown in fig. 2, the bonding layer 300 includes an adhesive layer, an elastic energy absorbing layer 320, a peelable adhesive layer 330, an elastic energy absorbing layer 320, and an adhesive layer, which are sequentially stacked, wherein the bonding layer 300 and the flexible battery module 200, and the bonding layer 300 and the flexible display module 100 are bonded and fixed by the adhesive layers.
It should be understood that the bonding layer 300 is a composite film layer, and includes an adhesive layer 310, an elastic energy absorbing layer 320 and a peelable adhesive layer 330, there is at least one layer of the adhesive layer 310, the elastic energy absorbing layer 320 and the peelable adhesive layer 330, and the positional relationship of the film layers can be various, which is just an example, and in practical application, the number of the film layers and the positional relationship of the film layers can be selected according to practical requirements.
Further, in the flexible display device provided by the embodiment of the present disclosure, the peelable glue layer 330 has a low viscosity and an easy peeling property while satisfying a normal adhesion effect, and the easy peeling property of the peelable glue layer 330 includes that the peelable glue layer 330 is easily peeled off with the assistance of a predetermined external condition, for example, the predetermined external condition includes the application of an external force, a temperature change (e.g., a temperature increase), or light irradiation (e.g., UV irradiation).
In addition, in the flexible display device provided by the embodiment of the present disclosure, the flexible display module 100 may be a flexible stretchable, rollable or foldable display module, the flexible battery module 200 may have stretchability, rollable or foldable property, and the flexible stretchability of the bonding layer 300 is greater than or equal to that of the flexible display module 100 and the flexible battery module 200 so as not to affect the bendability, the foldable or stretchable property of the flexible display module 100 and the flexible battery module 200.
In the embodiment of the present disclosure, the material of the elastic energy absorbing layer 320 is selected from any one of the following materials: an elastic energy absorbing material; the elastic energy-absorbing material and the insulating heat-conducting material are mixed.
With the above scheme, in some embodiments, the elastic energy absorbing layer 320 may be made of an elastic energy absorbing material, which has good elasticity to absorb the volume expansion and contraction change of the flexible battery module 200 caused in the charging and discharging processes, preferably, the elastic energy absorbing layer 320 may at least absorb the spatial change of the expansion and contraction rate of the flexible battery module 200 by more than 5%, and the elastic energy absorbing material may be: one or more of foam cotton, foamed polymer material, rubber and the like.
In other embodiments, the elastic energy absorbing layer 320 can be made of a mixed material of an elastic energy absorbing material and an insulating heat conducting material, that is, an insulating heat conducting material (for example, insulating heat conducting particles) can be added into the elastic energy absorbing layer 320, so that the elastic energy absorbing layer has an insulating effect, has a good heat conducting characteristic, and can conduct heat dissipated in the charging and discharging processes of the flexible battery module 200 in time to reduce ambient temperature.
It should be noted that, in the mixed material of the elastic energy-absorbing material and the insulating heat-conducting material, the mixing ratio of the elastic energy-absorbing material and the insulating heat-conducting material is not limited herein, and should be reasonably adjusted according to actual needs, and the specific material selection of the elastic energy-absorbing material and the insulating heat-conducting material is not limited either.
In some embodiments, as shown in fig. 1, the bonding layer 300 includes only one layer of the resilient tender layer 320.
In other embodiments, as shown in fig. 2 and 3, the bonding layer 300 includes at least two elastic energy absorbing layers 320, and of the at least two elastic energy absorbing layers 320, one elastic energy absorbing layer 320 closest to the flexible display module 100 is made of an elastic energy absorbing material, and the other elastic energy absorbing layer 320 closest to the flexible battery module 200 is made of a mixed material of an elastic energy absorbing material and an insulating heat conductive material.
By adopting the above scheme, when the bonding layer 300 includes two or more elastic energy absorbing layers 320, the elastic energy absorbing layer 320 closest to the flexible display module 100 is not added with an insulating and heat conducting material, so as to insulate the conduction of heat to the flexible display module 100, and prevent the display effect from being affected by the overhigh temperature of the flexible display module 100; and the layer 320 closest to the flexible battery module 200 is added with an insulating and heat conducting material to play an insulating role, and has good heat conducting property, and the heat dissipated in the charging and discharging processes of the flexible battery module 200 is conducted in time, so that the ambient temperature is reduced.
In addition, in the embodiment of the disclosure, the peelable glue layer 330 has an easy-to-peel characteristic while satisfying a normal bonding effect, so as to facilitate repair and detachment between the flexible display module 100 and the flexible battery module 200, and the flexible display module 100 is not easily damaged, the material of the peelable glue layer 330 may be an acrylic glue, a silicone glue, or the like, and the peelable glue may be an easy-to-pull glue.
Further, in some embodiments, the peelable glue may be a single film layer structure (single glue layer).
In other embodiments, the peelable glue layer may also be a composite film layer, for example, the peelable glue layer 330 includes at least two glue layers and a dielectric layer adhered between the two glue layers, and the dielectric layer can be peeled off from at least one of the two glue layers under the predetermined external condition.
In the above embodiment, in order to facilitate the easy peeling of the peelable glue layer 330, a medium layer which is easy to peel is present between the composite glue layers of the peelable glue layer 330, the medium layer is easy to separate from the glue layer without generating glue residue under a predetermined external condition, for example, an external force, a temperature change, or light irradiation or other conditions, and has good flexibility and is not easy to break in the flexible display device, and the material of the medium layer is at least one of Cyclic Olefin Polymer (COP), polyethylene terephthalate (PET), and Polyethylene (PE).
In addition, in the embodiment of the disclosure, the bonding layer 300 may be in plane bonding with the flexible display module 100, or may be in curved surface bonding, for example, as shown in fig. 11, when the flexible display module 100 is a curved panel module, the bonding layer 300 may be in plane bonding or curved surface bonding with the flexible display module 100, and the flexible electrode film layer 200 may be a special-shaped battery module matching the shape of the curved panel module.
In addition, the bonding layer 300 and the flexible battery module 200 may be bonded in a planar manner, and in some embodiments, as shown in fig. 3, the flexible battery module 200 includes a first surface opposite to the flexible display module 100, a second surface opposite to the first surface, and a side surface 201 between the first surface and the second surface, wherein the second film layer of the bonding layer 300 and at least one of the elastic energy absorbing layers 320 are wrapped at least around the first surface and the side surface 201.
In the above-mentioned disclosed embodiment, since the volume of the flexible battery module 200 may change during the charging and discharging processes, in order to avoid the volume change from damaging or causing other adverse effects on other components, the bonding layer 300 and the flexible battery module 200 may not be limited to be bonded in a plane, but may also be covered on the side of the flexible battery module 200 in a half-wrapping manner, wherein the elastic energy absorbing layer 320 may absorb the volume expansion and contraction change of the side of the flexible battery module 200 during the charging and discharging processes and caused by various factors, so as to avoid the expansion and contraction change from damaging other components on the side of the flexible battery module 200.
In addition, for the flexible battery module 200, the flexible chip of the battery can be flexibly packaged through corresponding segment design, and the display states of the bendable function and other forms of the battery can be realized, for example, the flexible package lithium ion battery mainly comprises an internal battery cell, a transmission lithium ion electrolyte and a flexible packaging film, the internal battery cell comprises a positive plate, a negative plate and a diaphragm, and the positive plate and the negative plate comprise active component layers. The flexible electrode plate is manufactured, so that the flexibility degree of the battery can be further improved. High-concentration polyvinylidene fluoride (PVDF) can be used as a tackifier, lithium iron phosphate (LFP) and Lithium Titanate (LTO) can be used as anode and cathode active materials respectively, Carbon Nano Tubes (CNT) are matched as a conductive agent, special viscoelastic gel printable ink is prepared under a certain condition according to a certain proportion, an electrode plate with a specific pattern shape is prepared by a printing technology, and the flexible function of the battery is realized by matching flexible aluminum-plastic film packaging.
In an exemplary embodiment of the present disclosure, as shown in fig. 5, the flexible battery module 200 includes: at least one flexible chip 210 and a flexible packaging layer 220 for packaging the flexible chip 210, wherein the flexible chip 210 includes:
a first flexible electrode 211, a diaphragm 212, and a second flexible electrode 213 stacked in this order;
a first current collector 214 disposed on a side of the first flexible electrode 211 away from the second flexible electrode 213;
and a second current collector 215 disposed on a side of the second flexible electrode 213 away from the first flexible electrode 211.
In the above disclosed embodiment, the flexible battery module 200 includes the flexible chip 210 and the flexible encapsulation layer 220, the flexible arrangement includes flexible electrode sheets, i.e., the first flexible electrode 211 and the second flexible electrode 213, the first flexible electrode 211 may be a flexible positive electrode sheet, and the second flexible electrode 213 may be a flexible negative electrode sheet; the first flexible electrode 211 and the second flexible electrode 213, which are custom-patterned, may be printed using a screen printing process.
The flexible positive plate is made of PVDF (polyvinylidene fluoride), NMP (N-methyl pyrrolidone) solvent, carbon nano tube CNT and LFP nano particles according to a certain proportion; the flexible negative plate is prepared from PVDF, NMP solvent, carbon nano tube CNT and LTO nano particles according to a certain proportion; the flexible packaging layer 220 can be made of an aluminum-plastic composite film.
In addition, in order to realize or increase the stretchability of the flexible battery module 200, as shown in fig. 4 and 6, a plurality of first opening patterns 216 are distributed on the first flexible electrode 211 and the second flexible electrode 213, and the first opening patterns 216 are hollow structures or the first opening patterns 216 are filled with an elastic buffer material 217.
In the above disclosed embodiment, the first flexible electrode 211 and the second flexible electrode 213 used in the flexible battery module 200 can be made into the shape of the patterned first opening pattern 216 by a screen printing process, so as to improve the stretchability of the flexible electrodes; the flexible packaging material is an aluminum-plastic packaging composite film and can comprise polyethylene, aluminum foil and polyester materials.
In addition, the flexible encapsulation layer 220 may be a closed encapsulation structure, that is, the flexible encapsulation layer 220 is a whole layer structure and can close the first opening pattern 216; or, the flexible packaging layer 220 may also be a hollow packaging structure, that is, the flexible packaging layer 220 also has a second opening pattern, and the second opening pattern corresponds to the first opening pattern 216, so that the packaged complete battery module is formed by patterned compression packaging, and the patterned flexible electrode is matched with the patterned flexible packaging layer 220, so that the bendable, stretchable or foldable characteristics of the flexible battery module 200 can be greatly increased, and the stretchable deformation in each direction can be realized.
In addition, in some embodiments of the present disclosure, the first opening pattern 216 and the second opening pattern may have hollow structures therein, that is, the inner space of the first opening pattern 216 and the second opening pattern is air.
In other embodiments of the present disclosure, as shown in fig. 4, the first opening patterns 216 and the second opening patterns are filled with an elastic buffer material 217, and the elastic buffer material 217 plays a role of energy absorption and buffering, so that the stress generated when the flexible battery module 200 is bent can be repeatedly absorbed and dispersed by filling the elastic buffer material with elastic deformation, and dead folding generated when the flexible portion is bent can be avoided, thereby achieving the purpose of long bending fatigue life.
In some embodiments, the resilient cushioning material 215 is a low modulus material including one or more of rubber, foamed polymer material, and foamed inorganic material.
In addition, as shown in fig. 7 to 10, the shape of the first opening pattern 216 may be a regular octagon, a circle, an ellipse, a rectangle, or a prism, or other figures, which is not limited thereto.
It should be further noted that, in the embodiment of the present disclosure, the flexible battery module 200 may be implemented in a cyclic manner by stacking the flexible chips 210, that is, a plurality of flexible chips 210 may be included, and the plurality of flexible chips 210 are stacked, and the thickness of the flexible battery module 200 is determined by the number of stacked layers of the flexible chips 210.
The following points need to be explained:
(1) the drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to the common design.
(2) For purposes of clarity, the thickness of layers or regions in the figures used to describe embodiments of the present disclosure are exaggerated or reduced, i.e., the figures are not drawn on a true scale. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
(3) Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.
The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and the scope of the present disclosure should be determined by the scope of the claims.
Claims (10)
1. A flexible display device is characterized by comprising a flexible display module, a flexible battery module and a bonding layer bonded between the flexible display module and the flexible battery module;
the bonding layer is a composite film layer and comprises at least one bonding glue layer, at least one elastic energy absorption layer and at least one peelable glue layer, wherein the bonding glue layer is arranged in a stacked mode, the elastic energy absorption layer is used for generating elastic deformation to absorb energy, and the peelable glue layer is used for peeling under a preset external condition;
and one film layer of the first film layer closest to the flexible display module and the second film layer closest to the flexible battery module of the bonding layer is the bonding adhesive layer, and the other film layer is the bonding adhesive layer or the peelable adhesive layer.
2. Flexible display device according to claim 1,
the predetermined external condition includes application of an external force, a temperature change, or light irradiation.
3. Flexible display device according to claim 1,
the elastic energy absorbing layer is made of any one of the following materials:
an elastic energy absorbing material;
the elastic energy-absorbing material and the insulating heat-conducting material are mixed.
4. Flexible display device according to claim 3,
the bonding layer comprises only one layer of the elastic energy absorbing layer;
or the binding layer comprises at least two elastic energy absorption layers, the elastic energy absorption layer is closest to one layer of the flexible display module in the at least two elastic energy absorption layers and is made of elastic energy absorption materials, and the elastic energy absorption layer is closest to one layer of the flexible battery module and is made of mixed materials of elastic energy absorption materials and insulating heat conduction materials.
5. Flexible display device according to claim 1,
the peelable glue layer is of a single-film-layer structure;
or the peelable glue layers are composite film layers and at least comprise two glue layers and a medium layer bonded between the two glue layers, the medium layer can be peeled from at least one glue layer of the two glue layers under the preset external condition, and the material of the medium layer is at least one of cycloolefin polymer, polyethylene terephthalate and polyethylene.
6. Flexible display device according to claim 1,
the flexible battery module comprises a first face opposite to the flexible display module, a second face opposite to the first face, and a side face located between the first face and the second face, wherein the second film layer of the bonding layer and at least one layer of the elastic energy absorbing layer are at least wrapped on the first face and the side face.
7. Flexible display device according to claim 1,
the flexible battery module comprises at least one flexible chip and a flexible packaging layer for packaging the flexible chip, wherein the flexible chip comprises a first flexible electrode, a diaphragm and a second flexible electrode which are sequentially stacked.
8. Flexible display device according to claim 7,
the flexible chip further comprises a first current collector arranged on one side of the first flexible electrode, which is far away from the second flexible electrode, and a second current collector arranged on one side of the second flexible electrode, which is far away from the first flexible electrode.
9. Flexible display device according to claim 7,
a plurality of first opening patterns are distributed on the first flexible electrode and the second flexible electrode, and the first opening patterns are hollow structures or elastic buffer materials are filled in the first opening patterns.
10. Flexible display device according to claim 9,
the flexible packaging layer is a closed packaging structure which is a whole layer structure and is used for closing the first opening pattern; or the flexible packaging layer is of a hollow packaging structure and is provided with a second opening pattern, and the second opening pattern corresponds to the first opening pattern.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410735.7A CN111554189A (en) | 2020-05-15 | 2020-05-15 | Flexible display device |
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| CN202010410735.7A CN111554189A (en) | 2020-05-15 | 2020-05-15 | Flexible display device |
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| CN111554189A true CN111554189A (en) | 2020-08-18 |
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| CN202010410735.7A Pending CN111554189A (en) | 2020-05-15 | 2020-05-15 | Flexible display device |
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Application publication date: 20200818 |