CN1312645C - Piezoelectric conversion driving device - Google Patents
Piezoelectric conversion driving device Download PDFInfo
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- CN1312645C CN1312645C CNB021489831A CN02148983A CN1312645C CN 1312645 C CN1312645 C CN 1312645C CN B021489831 A CNB021489831 A CN B021489831A CN 02148983 A CN02148983 A CN 02148983A CN 1312645 C CN1312645 C CN 1312645C
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- piezoelectric
- driving device
- module
- unit
- type conversion
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 15
- -1 MOS metal-oxide Chemical class 0.000 claims description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 2
- 150000001450 anions Chemical class 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000003475 lamination Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The present invention relates to a piezoelectric conversion driving device which is applied to elements or products which are required to be driven by high voltage or low voltage. The device comprises a driving die set which is composed of a single pulse width modulation (PWM) control unit and a single driving unit. The driving die set can output driving signals with the same phase and the same frequency to drive a plurality of converting units, a plurality of piezoelectric units and a plurality of loads to act.
Description
Technical field
The present invention relates to a kind of piezoelectric type conversion driving device, refer to a kind of piezoelectric type conversion driving device that utilizes single pulse-width modulation (PWM) control module and a plurality of converting units of single drive unit drives, piezoelectric unit and load action especially.
Background technology
At present commercially available desk-top and notebook computer, the used required light source of LCDs (LCD) of PDA, Webpad, be to utilize a drive unit to drive, with high drive cold cathode fluorescent lamp (CCFL), allow light be projected to backlight, the user just can clearly see shown picture.
Be particularly useful for the LCD display of LCD TV or additional touch controlled thin film, need more high brightness compensation visual demand.The drive unit of general driving cold cathode fluorescent lamp as shown in Figure 1, this device is to utilize single pulse-width modulation (PWM) control module to drive single driver element, utilize single drive unit drives transformer and load (cold cathode fluorescent lamp) again, and cold cathode fluorescent lamp is to utilize high pressure to light a lamp, when tube current is high more, brighter display.
When backlight illumination and uniformity coefficient deficiency, often use many tubes, pulse-width modulation control module, driver element, transformer number that this moment, driving was lighted also increase, and cause the change of circuit board volume big, cause making to go up difficult, cost increase.
Summary of the invention
Fundamental purpose of the present invention is to solve the defective of above-mentioned prior art, avoids defective to exist.The present invention utilizes single pulse-width modulation (PWM) control module and a plurality of converting units of drive unit drives, piezoelectric unit and load action, to reduce the part number, to dwindle circuit board, makes in the making to be more prone to, and cost of manufacture also decreases relatively.
For realizing above-mentioned purpose, piezoelectric type conversion driving device of the present invention includes: one by single pulse-width modulation (PWM) the driving module that control module and single driver element constituted, and this drive signal that drives module output same-phase and same frequency drives a plurality of converting units, a plurality of piezoelectric unit and a plurality of load action.
Description of drawings
The existing conjunction with figs. of relevant technology contents of the present invention and structure is described in detail as follows.
Fig. 1 is the circuit diagram of existing cold cathode tube drive device.
Fig. 2 is a first embodiment of the present invention synoptic diagram.
Fig. 3 is a second embodiment of the present invention synoptic diagram.
Embodiment
Referring to Fig. 2, be first embodiment of the present invention synoptic diagram.As shown in the figure: piezoelectric type conversion driving device of the present invention, being used for need be with the element or the product of high pressure or low-voltage driving, this device includes: one drives module 1, a plurality of and aforementioned driving module 1 is connected and is subjected to synchronously driven converting unit 2, a plurality of and aforementioned a plurality of converting unit 2 is connected and is subjected to synchronously driven piezoelectric unit 3, and a plurality of and aforementioned piezoelectric unit 3 is connected and is subjected to synchronously driven load 4, producing a drive signal with same-phase and same frequency by aforementioned driving module exports, can drive a plurality of converting units 2 with this drive signal, a plurality of piezoelectric units 3 move simultaneously to drive a plurality of loads 4.Because the part number reduces, and has dwindled circuit board, make in the making to be more prone to, cost of manufacture also decreases relatively.
The above-mentioned driving module of carrying 1 is made of single pulse-width modulation (PWM) control module 11 and single driver element 12, aforesaid pulse-width modulation (PWM) control module 11 drives driver element 12 with the signal of exporting a same-phase and same frequency, this driver element 12 is made of a MOS metal-oxide semiconductor element, after same-phase that exported by aforementioned pulse-width modulation (PWM) control module 11 and the driving of same frequency signal, can produce drive signal output.
In these a plurality of converting units 2, each converting unit 2 is made of an inductance, in order to change the signal that above-mentioned driving module 1 is exported.
In these a plurality of piezoelectric units 3, each piezoelectric unit 3 is constituted by in veneer or stacked piezoelectric sheet or the transformer any, can boost and the output of step-down, connecting a voltage at arbitrary piezoelectric unit 3 simultaneously feedbacks to above-mentioned pulse-width modulation (PWM) control module 11, and arbitrary load 4 connections one electric current is feedback to pulse-width modulation (PWM) control module 11, to feedback an electric current, allow pulse-width modulation (PWM) but the electric current of control module 11 sensing loads 4 makes pulse-width modulation (PWM) control module 11 controllable load 4 average currents.
These a plurality of loads 4 are element or the product of need with high pressure or low-voltage driving, as any of cold cathode fluorescent lamp pipe, ozone generation device, anion generator etc.
When driving module 1 is started by external power source, the signal of this pulse-width modulation (PWM) control module 11 output one same-phases and same frequency drives driver element 12 actions, the drive signal that this moment, driver element 12 driving backs were produced is after a plurality of converting units 2 conversions, can drive a plurality of piezoelectric units 3, cause each piezoelectric unit 3 to drive each load 4 action; Simultaneously, load 4 is feedback to the electric current of pulse-width modulation (PWM) control module 11 sensing loads 4 because of being connected with an electric current, makes pulse-width modulation (PWM) control module 11 controllable load 4 average currents, and load 4 can on average be driven.
Referring to Fig. 3, be second embodiment of the present invention synoptic diagram.As shown in the figure: this embodiment and the above embodiments are roughly the same, different being in after single pulse-width modulation (PWM) the control module 11a that drives module 1a drives single driver element 12a, utilize the converting unit 2a of two-way and piezoelectric unit 3a to drive single load 4a.Simultaneously two piezoelectric unit 3a export the opposite voltage of a pair of phase place to load 4a, can obtain output current evenly, bigger power output and the preferable characteristic of impedance matching, available single pulse-width modulation (PWM) control module 11a can drive many group load 4a simultaneously.
Claims (7)
1. piezoelectric type conversion driving device is characterized in that this device includes:
One drives module (1), in order to export a drive signal;
A plurality of converting units (2) are connected with above-mentioned driving module (1), and are driven the drive signal that module (1) exported and drive;
A plurality of piezoelectric units (3) are connected with above-mentioned a plurality of converting units (2), and the signal that exported by converting unit (2) drives;
A plurality of loads (4) be connected with above-mentioned a plurality of piezoelectric units (3), and the signal that exported by piezoelectric unit (3) drive;
The described a plurality of converting units of wherein said driving module driven in synchronism, a plurality of piezoelectric unit and a plurality of load;
Wherein said driving module (1) is made of single pulse-width modulation (PWM) control module (11) and single driver element (12); And
Wherein said pulse-width modulation (PWM) control module (11) is in order to the signal of output same-phase and same frequency.
2. piezoelectric type conversion driving device according to claim 1 is characterized in that, this driver element (12) is made of a MOS metal-oxide semiconductor element.
3. piezoelectric type conversion driving device according to claim 1 is characterized in that, this piezoelectric unit (3) adopts any structural design of individual layer or lamination.
4. piezoelectric type conversion driving device according to claim 1 is characterized in that this converting unit (2) is made of inductance.
5. piezoelectric type conversion driving device according to claim 1 is characterized in that described load is any in cold cathode fluorescent lamp pipe, ozone generation device, the anion generator.
6. piezoelectric type conversion driving device according to claim 1 is characterized in that, drives single load (4) with converting unit (2) and the piezoelectric unit (3) that drives module (1) driving two-way.
7. piezoelectric type conversion driving device according to claim 6 is characterized in that, this two piezoelectric unit (3) is exported the opposite voltage of a pair of phase place to load (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021489831A CN1312645C (en) | 2002-11-14 | 2002-11-14 | Piezoelectric conversion driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021489831A CN1312645C (en) | 2002-11-14 | 2002-11-14 | Piezoelectric conversion driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1501338A CN1501338A (en) | 2004-06-02 |
| CN1312645C true CN1312645C (en) | 2007-04-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021489831A Expired - Fee Related CN1312645C (en) | 2002-11-14 | 2002-11-14 | Piezoelectric conversion driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1312645C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2175432Y (en) * | 1993-07-07 | 1994-08-24 | 李家荣 | Maximum power switch regulated power supply |
| US5438498A (en) * | 1993-12-21 | 1995-08-01 | Raytheon Company | Series resonant converter having a resonant snubber |
| CN1169610A (en) * | 1996-06-12 | 1998-01-07 | 株式会社明电舍 | Power inverter having three or more parallel driven PWM-type power inverting units |
| US6044003A (en) * | 1998-04-27 | 2000-03-28 | Murata Manufacturing Co., Ltd. | Piezoelectric transformer-inverter |
| WO2002056643A1 (en) * | 2001-01-09 | 2002-07-18 | O2 Micro International Limited | Sequential burst mode activation circuit |
-
2002
- 2002-11-14 CN CNB021489831A patent/CN1312645C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2175432Y (en) * | 1993-07-07 | 1994-08-24 | 李家荣 | Maximum power switch regulated power supply |
| US5438498A (en) * | 1993-12-21 | 1995-08-01 | Raytheon Company | Series resonant converter having a resonant snubber |
| CN1169610A (en) * | 1996-06-12 | 1998-01-07 | 株式会社明电舍 | Power inverter having three or more parallel driven PWM-type power inverting units |
| US6044003A (en) * | 1998-04-27 | 2000-03-28 | Murata Manufacturing Co., Ltd. | Piezoelectric transformer-inverter |
| WO2002056643A1 (en) * | 2001-01-09 | 2002-07-18 | O2 Micro International Limited | Sequential burst mode activation circuit |
Non-Patent Citations (1)
| Title |
|---|
| 相位调制PWM开关电源原理及实现 师宇杰、刘海成，信息工程学院学报，第16卷第3期 1997 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1501338A (en) | 2004-06-02 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070425 Termination date: 20111114 |