CN102867496B - Public electrode voltage compensation circuit, array substrate and display - Google Patents
Public electrode voltage compensation circuit, array substrate and display Download PDFInfo
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- CN102867496B CN102867496B CN201210358283.8A CN201210358283A CN102867496B CN 102867496 B CN102867496 B CN 102867496B CN 201210358283 A CN201210358283 A CN 201210358283A CN 102867496 B CN102867496 B CN 102867496B
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- 239000000758 substrate Substances 0.000 title abstract 4
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 8
- 238000004364 calculation method Methods 0.000 abstract description 3
- 230000001447 compensatory effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 8
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- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
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Abstract
The invention discloses a public electrode voltage compensation circuit, an array substrate and a display and relates to the technical field of liquid crystal displays. Automatic compensative regulation of public electrode voltage is achieved, manual regulation is not required, and accordingly man hour is reduced. The public electrode voltage compensation circuit comprises a deviation calculation unit and a voltage compensation unit. The deviation calculation unit is connected with a grid line, a data line and a pixel electrode and is used for calculating a deviation value of voltage of the data line minus voltage of the pixel electrode when the grid line outputs a closing signal. The voltage compensation unit is used for using preset public electrode voltage to minus the deviation value to acquire compensated public electrode voltage. The array substrate comprises the public electrode voltage compensation circuit, the grid line, the data line and the pixel electrode, wherein the grid line, the data line and the pixel electrode are connected to the public electrode voltage compensation circuit. The display comprises the array substrate.
Description
Technical field
The present invention relates to LCD Technology field, relate in particular to a kind of common electrode voltage compensation circuit, array base palte and display device.
Background technology
Liquid crystal display is to control the liquid crystal anglec of rotation by the voltage difference between public electrode and pixel electrode, pixel electrode voltage is that the AC signal being provided by data line provides, but, due to the impact of stray capacitance on array base palte, make actual pixel electrode voltage be less than data line voltage, as shown in Figure 1, the moment that is shutdown signal at grid voltage Vgate, produce the deviate Δ Vp between actual pixels electrode voltage Vpixel and data line voltage Vdata, make the absolute voltage difference between the AC signal maximal value of actual pixels electrode voltage and minimum value and default public electrode voltages Vcom ' different, cause the angle difference of liquid crystal rotation, thereby produce flicker, be that flicker is bad.
In the manufacture process of liquid crystal display, because technique exists fluctuation, cause the deviate Δ Vp difference on different panels, therefore need manually each panel to be regulated respectively to the generation of avoiding flicker bad, thereby cause the increase of production hour, had a strong impact on production capacity.
Summary of the invention
Embodiments of the invention provide a kind of common electrode voltage compensation circuit, array base palte and display device, realize and automatically public electrode voltages are compensated to adjusting, without manually regulating, thereby have reduced man-hour.
For solving the problems of the technologies described above, embodiments of the invention adopt following technical scheme:
A kind of common electrode voltage compensation circuit, comprising:
Be connected in the deviation computing unit of grid line, data line and pixel electrode, deduct for calculate described data line voltage in the time that described grid line is exported shutdown signal the deviate that described pixel electrode voltage obtains;
Voltage compensation unit, for deducting the public electrode voltages after described deviate is compensated by default public electrode voltages.
Described deviation computing unit comprises:
Be connected in the A/D converter of described data line and pixel electrode, for described data line voltage and described pixel electrode voltage are converted into digital signal by simulating signal;
Be connected in the subtracter of described A/D converter, subtract each other for the data line voltage and the pixel electrode voltage that are converted into after digital signal described in calculating the deviate obtaining;
Be connected in the trigger of described grid line, subtracter and A/D converter, for trigger described A/D converter and subtracter work in the time that described grid line is exported shutdown signal;
Described voltage compensation unit comprises public electrode voltages register, for deduct the public electrode voltages after described deviate is compensated by default public electrode voltages.
A kind of array base palte, comprising:
Above-mentioned common electrode voltage compensation circuit;
Be connected in grid line, data line and the pixel electrode of described common electrode voltage compensation circuit.
Described pixel electrode is the pixel electrode in the middle of the first row.
A kind of display device, comprises above-mentioned array base palte.
Common electrode voltage compensation circuit, array base palte and display device in the embodiment of the present invention, carry out the deviate of computational data line voltage and actual pixels electrode voltage by deviation computing unit, and public electrode voltages is compensated by voltage compensation unit according to this deviate, realize and automatically public electrode voltages is compensated to adjusting, compared with manually each panel being regulated respectively with prior art, without manually regulating, thereby reduce man-hour, improved production capacity.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the waveform schematic diagram that produces deviate Δ Vp;
Fig. 2 is the schematic diagram of a kind of common electrode voltage compensation circuit in the embodiment of the present invention;
Fig. 3 is the schematic diagram of another kind of common electrode voltage compensation circuit in the embodiment of the present invention;
Fig. 4 is the structural representation of a kind of array base palte in the embodiment of the present invention.
Description of reference numerals:
1-deviation computing unit; 11-A/D converter; 12-subtracter; 13-trigger; 2-voltage compensation unit; 21-public electrode voltages register; 3-common electrode voltage compensation circuit.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 2, the embodiment of the present invention provides a kind of common electrode voltage compensation circuit, comprising:
Be connected in the deviation computing unit 1 of grid line gate, data line data and pixel electrode pixel, deduct for computational data line voltage Vdata in the time that grid line gate exports shutdown signal the deviate Δ Vp that pixel electrode voltage Vpixel obtains;
Particularly, grid line gate, data line data and pixel electrode pixel are connected to grid, source electrode and the drain electrode of thin film transistor (TFT) TFT.
Voltage compensation unit 2, for deducting the public electrode voltages Vcom after deviate Δ Vp is compensated with default public electrode voltages Vcom '.
Illustrate the common electrode voltage compensation circuit in the present embodiment as an example of the Compensation Regulation method of public electrode voltages example below.
For example default public electrode voltages Vcom ' is 4v, data line voltage Vdata is the AC signal of 2～6v, the absolute voltage difference of now liquid crystal rotation should be | 4-2|=2v and | 6-4|=2v, but due to the impact of stray capacitance, produce the deviate Δ Vp between actual pixels electrode voltage Vpixel and data line voltage Vdata, Δ Vp is 1v, therefore actual pixels electrode voltage Vpixel is 1～5v, in the time of the AC signal minimum value of actual pixels electrode voltage and maximal value, the absolute voltage difference of actual liquid crystal rotation is respectively | 4-1|=3v and | 5-4|=1v, thereby it is bad to produce flicker.The compensation method of the present embodiment deducts by deviation computing unit computational data line voltage Vdata in the time that grid line gate exports shutdown signal the deviate Δ Vp that pixel electrode voltage Vpixel obtains, Δ Vp=Vdata-Vpixel=6-5=2-1=1v, voltage compensation unit is connected in public electrode, can obtain the default public electrode voltages Vcom of storage, use default public electrode voltages Vcom ' to deduct the public electrode voltages Vcom after deviate Δ Vp is compensated, Vcom=Vcom '-Δ Vp=4-1=3v by voltage compensation unit.After public electrode voltages Vcom after output compensation, the absolute voltage difference of actual liquid crystal rotation is | 3-1|=|5-3|=2v, thus avoid the bad generation of flicker.
It should be noted that, due to the capacitance difference of the electric capacity that determines deviate Δ Vp under different GTGs, be therefore preferably the Compensation Regulation of carrying out above-mentioned public electrode voltages under flicker pattern.
Common electrode voltage compensation circuit in the embodiment of the present invention, carry out the deviate of computational data line voltage and actual pixels electrode voltage by deviation computing unit, and public electrode voltages is compensated by voltage compensation unit according to this deviate, realize and automatically public electrode voltages is compensated to adjusting, compared with manually each panel being regulated respectively with prior art, without manually regulating, thereby reduce man-hour, improved production capacity.
As shown in Figure 3, particularly, deviation computing unit comprises:
Be connected in the A/D converter 11 of data line data and pixel electrode pixel, for data line voltage Vdata and pixel electrode voltage Vpixel are converted into digital signal by simulating signal;
Particularly, wire and data line data between pixel electrode pixel and A/D converter 11 are produced on same layer, and are connected in pixel electrode pixel by via hole.
Be connected in the subtracter 12 of A/D converter 11, subtract each other for calculating the data line voltage Vdata and the pixel electrode voltage Vpixel that are converted into after digital signal the deviate Δ Vp obtaining;
Be connected in the trigger 13 of grid line gate, subtracter 12 and A/D converter 11, for triggering A/D converter 11 when the grid line gate output shutdown signal and subtracter 12 is worked;
Open because TFT is generally high level, now 13, trigger is negative edge trigger.Particularly, as shown in Figure 1, because grid line gate output signal becomes low level from high level, above-mentioned TFT turn-offs while making and can produce above-mentioned deviate Δ Vp, therefore in the time of grid line gate output shutdown signal, triggers A/D converter 11 collection signals and subtracter 12 calculation deviation value Δ Vp.
Voltage compensation unit comprises public electrode voltages register 21, for deduct the public electrode voltages Vcom after deviate Δ Vp is compensated with default public electrode voltages Vcom '.In public electrode voltages register 21, store default public electrode voltages, and be connected in public electrode, therefore after the public electrode voltages Vcom after being compensated, may be output to public electrode, regulate with the output that realizes public electrode voltages Vcom value, thereby avoided the bad generation of flicker.
Above-mentioned A/D converter 11, subtracter 12, trigger 13 and public electrode voltages register 21 can be integrated in the drive IC of existing array base palte.
Common electrode voltage compensation circuit in the embodiment of the present invention, carry out the deviate of computational data line voltage and actual pixels electrode voltage by deviation computing unit, and public electrode voltages is compensated by voltage compensation unit according to this deviate, realize and automatically public electrode voltages is compensated to adjusting, compared with manually each panel being regulated respectively with prior art, without manually regulating, thereby reduce man-hour, improved production capacity.
Further, as shown in Figure 4, the embodiment of the present invention also provides a kind of array base palte, comprises by several row grid lines and ordered series of numbers data line and intersects the several pixel electrodes that define, and also comprises: above-mentioned common electrode voltage compensation circuit 3; Common electrode voltage compensation circuit 3 is connected in grid line gate, data line data and pixel electrode pixel wherein; Grid line gate and data line data are connected in pixel electrode pixel by thin film transistor (TFT) TFT.Grid line gate, data line data and pixel electrode pixel are connected to grid, source electrode and the drain electrode of thin film transistor (TFT) TFT.
Further, pixel electrode pixel is preferably the middle pixel electrode of the first row.Because of the wiring of part for this reason relatively loose, and be positioned at can viewing area edge, and common electrode voltage compensation circuit 3 be preferably be produced on can viewing area outside, and line between this pixel electrode is convenient.Connecting line between common electrode voltage compensation circuit 3 and grid line gate can be made at same layer with grid line, and the connecting line between common electrode voltage compensation circuit 3 and data line data and pixel electrode pixel can be made at same layer with data line.
The Compensation Regulation method of the structure of common electrode voltage compensation circuit and public electrode voltages is same as the previously described embodiments particularly, does not repeat them here.
Array base palte in the embodiment of the present invention, carry out the deviate of computational data line voltage and actual pixels electrode voltage by the deviation computing unit in common electrode voltage compensation circuit, and public electrode voltages is compensated by voltage compensation unit according to this deviate, realize and automatically public electrode voltages is compensated to adjusting, compared with manually each panel being regulated respectively with prior art, without manually regulating, thereby reduce man-hour, improved production capacity.
The embodiment of the present invention also provides a kind of display device, comprises above-mentioned array base palte.
Array base-plate structure is same as the previously described embodiments particularly, does not repeat them here.
Display device in the embodiment of the present invention, carry out the deviate of computational data line voltage and actual pixels electrode voltage by the deviation computing unit in common electrode voltage compensation circuit on array base palte, and public electrode voltages is compensated by voltage compensation unit according to this deviate, realize and automatically public electrode voltages is compensated to adjusting, compared with manually each panel being regulated respectively with prior art, without manually regulating, thereby reduce man-hour, improved production capacity.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential common hardware by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better embodiment.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium can read, as the floppy disk of computing machine, hard disk or CD etc., comprise that some instructions are in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (5)
1. a common electrode voltage compensation circuit, is characterized in that, comprising:
Be connected in the deviation computing unit of grid line, data line and pixel electrode, deduct for calculate described data line voltage in the time that described grid line is exported shutdown signal the deviate that described pixel electrode voltage obtains;
Voltage compensation unit, for deducting the public electrode voltages after described deviate is compensated by default public electrode voltages;
Described deviation computing unit comprises:
Be connected in the A/D converter of described data line and pixel electrode, for described data line voltage and described pixel electrode voltage are converted into digital signal by simulating signal;
Be connected in the subtracter of described A/D converter, subtract each other for the data line voltage and the pixel electrode voltage that are converted into after digital signal described in calculating the deviate obtaining;
Be connected in the trigger of described grid line, subtracter and A/D converter, for trigger described A/D converter and subtracter work in the time that described grid line is exported shutdown signal.
2. common electrode voltage compensation circuit according to claim 1, is characterized in that,
Described voltage compensation unit comprises public electrode voltages register, for deduct the public electrode voltages after described deviate is compensated by default public electrode voltages.
3. an array base palte, is characterized in that, comprising:
Common electrode voltage compensation circuit as claimed in claim 1 or 2;
Be connected in grid line, data line and the pixel electrode of described common electrode voltage compensation circuit.
4. array base palte according to claim 3, is characterized in that,
Described pixel electrode is the pixel electrode in the middle of the first row.
5. a display device, is characterized in that, comprises the array base palte as described in claim 3 or 4.
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| CN201210358283.8A CN102867496B (en) | 2012-09-24 | 2012-09-24 | Public electrode voltage compensation circuit, array substrate and display |
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| CN201210358283.8A CN102867496B (en) | 2012-09-24 | 2012-09-24 | Public electrode voltage compensation circuit, array substrate and display |
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| CN102867496B true CN102867496B (en) | 2014-07-30 |
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| CN105469767B (en) * | 2016-01-05 | 2017-11-07 | 京东方科技集团股份有限公司 | A kind of common electric voltage compensation circuit, compensation method, display panel and display device |
| CN105529008B (en) * | 2016-02-01 | 2018-03-30 | 深圳市华星光电技术有限公司 | The driving method of liquid crystal display panel |
| CN105913824B (en) * | 2016-06-30 | 2019-02-12 | 京东方科技集团股份有限公司 | Public electrode control method and circuit, display device |
| CN108269544B (en) * | 2018-01-31 | 2020-08-25 | 京东方科技集团股份有限公司 | Flicker drift optimization circuit, display panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1854823A (en) * | 2005-04-29 | 2006-11-01 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and method of driving the same |
| CN1987621A (en) * | 2005-12-23 | 2007-06-27 | 京东方科技集团股份有限公司 | Leaping voltage measuring for thin film transistor liquid crystal display screen and automatic regulator for public electrode voltage |
| CN101320170A (en) * | 2007-06-08 | 2008-12-10 | 群康科技(深圳)有限公司 | LCD device |
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| KR20070015695A (en) * | 2005-08-01 | 2007-02-06 | 삼성전자주식회사 | Liquid crystal display and driving method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1854823A (en) * | 2005-04-29 | 2006-11-01 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and method of driving the same |
| CN1987621A (en) * | 2005-12-23 | 2007-06-27 | 京东方科技集团股份有限公司 | Leaping voltage measuring for thin film transistor liquid crystal display screen and automatic regulator for public electrode voltage |
| CN101320170A (en) * | 2007-06-08 | 2008-12-10 | 群康科技(深圳)有限公司 | LCD device |
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