CN102654983A - Liquid crystal display device drive method and circuit, and display device - Google Patents
Liquid crystal display device drive method and circuit, and display device Download PDFInfo
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- CN102654983A CN102654983A CN2011102802060A CN201110280206A CN102654983A CN 102654983 A CN102654983 A CN 102654983A CN 2011102802060 A CN2011102802060 A CN 2011102802060A CN 201110280206 A CN201110280206 A CN 201110280206A CN 102654983 A CN102654983 A CN 102654983A
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Abstract
The invention discloses a liquid crystal display device drive method and circuit and the display device. The liquid crystal display device drive method is designed for solving the problem of high energy consumption of the conventional drive method. The liquid crystal display device drive method is characterized by responding to a polarity inversion signal in a frame period and alternately connecting a common electrode substrate with a high level or a low level. The input terminal of the liquid crystal display device drive circuit is connected with the polarity inversion signal, and the output terminal of the liquid crystal display device drive circuit is connected with the common electrode substrate; the liquid crystal display device drive circuit responds to the polarity inversion signal, and the high level or the low level is output from the output terminal of the liquid crystal display device drive circuit; and the liquid crystal display device drive circuit comprises a power supply and a voltage conversion chip or comprises a power supply, a grounding terminal and a bothway switch. The liquid crystal display device drive method can be used for effectively reducing the voltage change range of a data line. The liquid crystal display device drive circuit is simple and rational in structure and has a good energy conservation effect. The liquid crystal display device comprises the drive circuit, has a good display effect and can reduce the cost and save energy resources.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator actuation techniques, particularly relate to a kind of liquid crystal display apparatus driving circuit, driving circuit and display device.
Background technology
The principle of work of liquid crystal indicator is: it is different to be mixed in liquid crystal molecule between the two battery lead plates anglec of rotation under different voltages with different, and then causes the light transmission amount different, realizes that each independent pixel controls different GTGs.The polar plate voltage up and down of accurate each pixel of control just can be realized the picture image that needs.
In two electrode substrates of common electrode (TFT), one of them is as common electrode voltage Vcom, and voltage swing is invariable; And another substrate connects data line, the different pieces of information signal Vpix (voltage swing) that the response data line provides, and voltage swing is controlled by it between substrate.For preventing that liquid crystal from producing catabiosis under the electric field of single direction, and avoid direct current residual etc., generally can use polarity inversion signal to make liquid crystal follow counter-rotating.
Because the existence of reversal of poles; Make the required voltage range that provides of data line increase one times; The constant 5V that is set in of common electrode voltage constant generally speaking for example; Realize controlling the voltage range that 256 GTGs need 5V, if do not need reversed polarity, data line only need provide the voltage range of 5～10V; Reversed polarity then needs the voltage range of 0～10V to come correspondence if desired.The increase of voltage range requires the driving of data line and be energy-conservation is very disadvantageous.
Summary of the invention
In order to overcome above-mentioned defective, the present invention provides a kind of liquid crystal display apparatus driving circuit, driving circuit and display device that does not increase voltage range.
For achieving the above object liquid crystal display apparatus driving circuit of the present invention: the response polarity inversion signal, common electrode substrate alternately connects high level or low level.
Particularly, polarity inversion signal is the cycle with the frame.
A kind of liquid crystal indicator driving circuit, input termination polarity inversion signal, output termination common electrode substrate; The response polarity inversion signal, output terminal output high level or low level.
Particularly, said liquid crystal indicator driving circuit comprises:
Power supply is for said liquid crystal indicator driving circuit provides burning voltage;
Voltage transitions chip, first input end connect said power supply, the said reverse signal of the second input termination, output termination driving circuit output terminal; Said voltage transitions die response polarity inversion signal is to output terminal output high level or low level.
Further, the output terminal of voltage transitions chip comprises high level output terminal and low level output terminal.
Particularly, said liquid crystal indicator driving circuit comprises:
Power supply provides burning voltage;
Earth terminal provides low-voltage;
Two-way switch alternately connects first switching point or second switch point behind the response polarity inversion signal;
Power supply, output terminal and the series connection of first switching point form first loop; Earth point, output terminal and the series connection of second switch point form second loop.
A kind of liquid crystal indicator comprises above-mentioned liquid crystal indicator driving circuit.
Liquid crystal display apparatus driving circuit of the present invention changes common electrode voltage Vcom into alternately occur high level and low level by fixed value, reduces the change in voltage scope of data line.
Liquid crystal indicator driving circuit of the present invention responds reverse signal and alternately exports high level and low level, and is simple and reasonable for structure, good energy-conserving effect.Liquid crystal indicator display effect of the present invention is good, reduces cost energy savings.
Description of drawings
Fig. 1 is existing common electrode voltage sequential synoptic diagram;
Fig. 2 is a preferred embodiment of the present invention common electrode voltage sequential synoptic diagram.
Embodiment
Below in conjunction with Figure of description and embodiment the present invention is done detailed description.
As shown in Figure 1, be existing common electrode voltage mode, voltage constant does not become 5V.Realize reversal of poles, promptly the liquid crystal voltage needs in-5～5V scope, and data line need provide 0～10V voltage.
As shown in Figure 2, liquid crystal display apparatus driving circuit of the present invention: during first frame, the response polarity inversion signal, common electrode substrate connects high level; During second frame, the response polarity inversion signal, common electrode substrate connects low level.Next, repeat first frame during odd-numbered frame, repeat second frame during even frame, high level and low level alternately occur.
When needing output cathode property voltage at the first frame liquid crystal two ends; Common electrode voltage is 0V at this moment; Data line only need provide voltage range between the liquid crystal that 0～5V voltage can realize 0～5V, and when the second frame liquid crystal two ends needed output negative pole property voltage, common electrode voltage was 5V; This moment, data line same only need provide 0～5V voltage, can realize-liquid crystal of 5～0V between voltage range.With respect to existing structure, the required voltage range drop by half that provides of data line, energy-saving effect is remarkable.
Corresponding above-mentioned driving method, liquid crystal indicator driving circuit of the present invention, input termination reverse signal, output termination common electrode substrate, the response polarity inversion signal, output terminal is alternately exported high level or low level.
Through the effect of polarity inversion signal, realized that driving circuit alternately exports high level and low level, the voltage of corresponding data line need not to do on a large scale and changes with it, has realized reducing the cost, the effect of energy savings.
Preferred embodiment one: driving circuit of the present invention is included as power supply and the voltage transitions chip that driving circuit provides burning voltage.The voltage transitions chip, first input end connects power supply, the second input termination polarity inversion signal, output termination driving circuit output terminal.Wherein, the output terminal of voltage transitions chip can be single-ended also can be both-end, promptly the voltage transitions chip output can comprise first voltage output end and second voltage output end.
Power supply provides 5V voltage, after the conversion of voltage transitions chip, produces two Vcom reference voltages, and 5V and 0V utilize original polarity inversion signal Mpol to control the output state of two reference voltages, obtain required common electrode voltage mode.
Preferred embodiment two: driving circuit of the present invention comprises that one provides the power supply, of burning voltage that the earth terminal and a two-way switch of low-voltage are provided.Two-way switch alternately connects first switching point or second switch point behind the response polarity inversion signal.
Wherein, power supply, output terminal and the series connection of first switching point form first loop; Earth point, output terminal and the series connection of second switch point form second loop.
The response polarity inversion signal, two-way switch alternately connects first switching point and second switch point, promptly is alternately closed first loop and second loop.Correspondingly, the output terminal output valve alternately is high level and low level.Reduced data line voltage effectively.
Liquid crystal indicator driving circuit structure of the present invention is simple, reasonable, good energy-conserving effect.
Liquid crystal indicator of the present invention comprises above-mentioned liquid crystal indicator driving circuit, and display effect is good, reduces cost energy savings.
More than; Be merely preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.
Claims (7)
1. liquid crystal display apparatus driving circuit is characterized in that: the response polarity inversion signal, common electrode substrate alternately connects high level or low level.
2. liquid crystal display apparatus driving circuit according to claim 1 is characterized in that: polarity inversion signal is the cycle with the frame.
3. a liquid crystal indicator driving circuit is characterized in that: input termination polarity inversion signal, output termination common electrode substrate; The response polarity inversion signal, output terminal output high level or low level.
4. liquid crystal indicator driving circuit according to claim 3 is characterized in that: comprising:
Power supply is for said driving circuit provides burning voltage;
Voltage transitions chip, first input end connect said power supply, and second input end connects said reverse signal, and output terminal connects the driving circuit output terminal; Said voltage transitions die response polarity inversion signal is to output terminal output high level or low level.
5. liquid crystal indicator driving circuit according to claim 4 is characterized in that: the output terminal of voltage transitions chip comprises high level output terminal and low level output terminal.
6. liquid crystal indicator driving circuit according to claim 3 is characterized in that, comprising:
Power supply provides burning voltage;
Earth terminal provides low-voltage;
Two-way switch alternately connects first switching point or second switch point behind the response polarity inversion signal;
Power supply, output terminal and the series connection of first switching point form first loop; Earth point, output terminal and the series connection of second switch point form second loop.
7. a liquid crystal indicator is characterized in that: comprise like the arbitrary described liquid crystal indicator driving circuit of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102802060A CN102654983A (en) | 2011-09-20 | 2011-09-20 | Liquid crystal display device drive method and circuit, and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102802060A CN102654983A (en) | 2011-09-20 | 2011-09-20 | Liquid crystal display device drive method and circuit, and display device |
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| CN102654983A true CN102654983A (en) | 2012-09-05 |
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| CN2011102802060A Pending CN102654983A (en) | 2011-09-20 | 2011-09-20 | Liquid crystal display device drive method and circuit, and display device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437175A (en) * | 2002-02-08 | 2003-08-20 | 夏普株式会社 | Display device and drive circuit and drive method thereof |
| CN1576979A (en) * | 2003-06-30 | 2005-02-09 | 株式会社瑞萨科技 | Liquid crystal drive device |
| CN101533628A (en) * | 2008-03-13 | 2009-09-16 | 株式会社日立显示器 | Liquid crystal display device |
| US7633478B2 (en) * | 2005-01-20 | 2009-12-15 | Seiko Epson Corporation | Power supply circuit, display driver, electro-optical device, electronic instrument, and method of controlling power supply circuit |
| CN101783121A (en) * | 2009-01-16 | 2010-07-21 | Nec液晶技术株式会社 | Liquid crystal display device, and driving method and integrated circuit used in same |
-
2011
- 2011-09-20 CN CN2011102802060A patent/CN102654983A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437175A (en) * | 2002-02-08 | 2003-08-20 | 夏普株式会社 | Display device and drive circuit and drive method thereof |
| CN1576979A (en) * | 2003-06-30 | 2005-02-09 | 株式会社瑞萨科技 | Liquid crystal drive device |
| US7633478B2 (en) * | 2005-01-20 | 2009-12-15 | Seiko Epson Corporation | Power supply circuit, display driver, electro-optical device, electronic instrument, and method of controlling power supply circuit |
| CN101533628A (en) * | 2008-03-13 | 2009-09-16 | 株式会社日立显示器 | Liquid crystal display device |
| CN101783121A (en) * | 2009-01-16 | 2010-07-21 | Nec液晶技术株式会社 | Liquid crystal display device, and driving method and integrated circuit used in same |
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Application publication date: 20120905 |