CN101197110A - Liquid crystal display device and its driving method - Google Patents
Liquid crystal display device and its driving method Download PDFInfo
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- CN101197110A CN101197110A CNA2006101574507A CN200610157450A CN101197110A CN 101197110 A CN101197110 A CN 101197110A CN A2006101574507 A CNA2006101574507 A CN A2006101574507A CN 200610157450 A CN200610157450 A CN 200610157450A CN 101197110 A CN101197110 A CN 101197110A
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- lcd
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Abstract
The invention relates to a liquid crystal displayer, which comprises a liquid crystal display panel, at least one data driving chip, at least one scanning driving chip and a control circuit. The scanning driving chip is used for scanning the liquid crystal display panel. A region of the liquid crystal display panel scanned by the scanning driving chip correspondingly is defined as a displaying region. The data driving chip is used for outputting a plurality of gray-scale voltage to the displaying region during the period of the displaying region is scanned. The control circuit adjusts the gray-scale voltage before the gray-scale voltage is provided to the displaying region, so the total quatity of the adjusting quantity of the gray-scale voltage corresponding to different displaying regions and the reducing quantity in the transmitting process keep consistent. The invention further provides a driving method of the liquid crystal displayer.
Description
Technical field
The present invention relates to a kind of Liquid Crystal Display And Method For Driving.
Background technology
LCD has been widely used in electronic equipments such as TV, notebook computer, mobile phone, personal digital assistant because of having characteristics such as low radiation, thin thickness and power consumption be low.
Seeing also Fig. 1, is a kind of circuit diagram of prior art LCD.This LCD 100 comprises a display panels 110, a plurality of data driving chip 130 and a plurality of scanning drive chip 150.
This display panels 110 comprises one first substrate (figure does not show), and one second substrate (figure does not show) and is arranged on the liquid crystal layer (figure does not show) between this first substrate and this second substrate.This first substrate comprises many sweep traces that are parallel to each other 112, many be parallel to each other and with these sweep trace 112 vertically insulated crossing data lines 114, a plurality of thin film transistor (TFT) 116 and a plurality of pixel electrodes 118 that are positioned at this sweep trace 112 and these data line 114 infalls.This second substrate comprises the public electrode 119 that a plurality of and this pixel electrode 118 are relative.Liquid crystal molecule between one thin film transistor (TFT) 116, a pixel electrode 118, a public electrode 119 and this pixel electrode 118 and this public electrode 119 (not indicating) constitutes a pixel cell 120.
See also Fig. 2, Fig. 2 is the equivalent circuit diagram of this pixel cell 120.The grid 1162 of this thin film transistor (TFT) 116 is connected to this sweep trace 112, and source electrode 1163 is connected to this data line 114, and drain electrode 1164 is connected to this pixel electrode 118.Gray scale voltage on this data line 114 is sent to this pixel electrode 118 to realize the demonstration of this pixel cell 120 by this thin film transistor (TFT) 116.This thin film transistor (TFT) 116 is as the switch of gray scale voltage transmission.
This data line 114 itself has certain resistance R, and can produce a stray capacitance C between the source electrode 1163 of this thin film transistor (TFT) 116 and the drain electrode 1164
Sd, make this resistance R and this stray capacitance C
SdConstitute a RC delay circuit together.This RC delay circuit makes and to be provided to gray scale voltage on this data line 114 along data line 114 decay and reduce, and decrease is by the resistance R and the stray capacitance C of this data line 114 itself
SdDecision.
See also Fig. 3, Fig. 3 is the gray scale voltage oscillogram on one of this display panels 110 data line 114.Wherein, V
D1The gray scale voltage oscillogram at contiguous these data driving chip 130 places of expression, V
D2Expression is away from the gray scale voltage oscillogram at these data driving chip 130 places.The gray scale voltage at contiguous these data driving chip 130 places reduces less, gray scale voltage away from these data driving chip 130 places reduces more, thereby these data driving chip 130 places of vicinity that cause this display panels 110 are with inconsistent away from the picture brightness at these data driving chip 130 places, and then influence the picture display quality of this LCD 100.
Summary of the invention
For solving the problem of LCD picture inferior quality in the prior art, be necessary to provide a kind of picture display quality higher LCD.
In addition, also be necessary to provide the driving method of the higher LCD of a kind of picture display quality.
A kind of LCD comprises a display panels, at least one data driving chip, at least one scanning drive chip and a control circuit.This scanning drive chip is used for scanning this display panels, and a zone definitions of the display panels of the corresponding scanning of one scan chip for driving is a viewing area.This data driving chip is used for exporting a plurality of gray scale voltages to this viewing area during a viewing area is scanned.This control circuit is used for adjusting this gray scale voltage before this gray scale voltage is provided to this viewing area, and the adjustment amount of the pairing gray scale voltage in different viewing areas and the summation of the decrease in the transport process are consistent.
A kind of driving method of LCD, this LCD comprises that one has the display panels of n viewing area, at least one data driving chip and a control circuit, the 1st to the n viewing area gradually away from this data driving chip, this driving method comprises the steps:
A. provide a plurality of sweep signals to a viewing area, this data driving chip produces a plurality of gray scale voltages of this viewing area correspondence; With
B. this control circuit is adjusted this gray scale voltage, transmits this gray scale voltage to this viewing area.
Compared to prior art, this LCD has this control circuit, this control circuit is provided to the viewing area of this display panels after with this gray scale voltage adjustment, decay takes place and reduces in this gray scale voltage in transport process, make the viewing area that is sent to contiguous this data driving chip and be consistent away from the adjustment amount of the pairing gray scale voltage in viewing area of this data driving chip and the summation of decrease, and then overcome the inconsistent problem of panel luminance, promote the display quality of this LCD.
Description of drawings
Fig. 1 is a kind of circuit diagram of prior art LCD.
Fig. 2 is the equivalent circuit diagram of LCD one pixel cell shown in Figure 1.
Fig. 3 is the gray scale voltage decay oscillogram on LCD one data line shown in Figure 1.
Fig. 4 is the circuit diagram of LCD one better embodiment of the present invention.
Embodiment
Seeing also Fig. 4, is the circuit diagram of LCD one better embodiment of the present invention.This LCD 200 comprises a display panels 210, a plurality of data driving chip 230, a plurality of scanning drive chip 250 (the 1st scanning drive chip is to the n scanning drive chip) and a control circuit 260.
This display panels 210 comprises that one first substrate (figure does not show), one second substrate (figure does not show) and are arranged on the liquid crystal layer (figure does not show) between this first substrate and this second substrate.This first substrate comprises that many sweep traces that are parallel to each other 212, many are parallel to each other and the data line 214 that intersects vertically with these sweep trace 212 insulation respectively, a plurality of thin film transistor (TFT) 216 and a plurality of pixel electrode 218 that is positioned at this sweep trace 212 and these data line 214 infalls.The grid of this thin film transistor (TFT) 216 (not indicating) is connected to this sweep trace 212, and source electrode (not indicating) is connected to this data line 214, and drain electrode (not indicating) is connected to this pixel electrode 218.This second substrate comprises the public electrode 219 that a plurality of and this pixel electrode 218 are corresponding.
This scanning drive chip 250 comprises a plurality of output terminals (not indicating), is connected respectively to this sweep trace 212, is used for driving this sweep trace 212.Sweep trace 212 The corresponding area that one scan chip for driving 250 is connected in this display panels 210 are defined as a viewing area 240, then this display panels 210 comprises n viewing area 240, that is, the 1st viewing area 240 to n viewing area 240 gradually away from this data driving chip 230.
This control circuit 260 comprises a controller 290 and a plurality of field effect transistor 270.The grid of this field effect transistor 270 (not indicating) is connected to this controller 290, and drain electrode (not indicating) is connected to this data line 214.This data driving chip 230 comprises a plurality of output terminals (not indicating), and this output terminal is connected to the source electrode (not indicating) of this field effect transistor 270, that is, each output terminal is connected to a data line 214 by a field effect transistor 270.
This data driving chip 230 is used for exporting a plurality of gray scale voltages of each viewing area 240 correspondence.This field effect transistor 270 is used for reducing this gray scale voltage.This controller 260 receives a trigger pip, and controls the decrease of 270 pairs of gray scale voltages of these field effect transistors according to different viewing area 240.
This field effect transistor 270 is voltage controlled elements, and when the voltage of the grid of importing this field effect transistor 270 increased, its conducting degree is big, and was low by the voltage decrease of its source electrode, drain electrode.
The principle of work of this LCD 200 is as follows:
A. an external circuit (figure do not show), a flexible circuit board (figure do not show) for example, provide a trigger pip to the 1st scanning drive chip 250 and this controller 290, make this sweep trace 212 of a plurality of sweep signals to the of the 1st scanning drive chip 250 outputs 1 viewing area 240, simultaneously these controller 290 outputs the 1st control voltage V
1Grid to this field effect transistor 270, this moment, this data driving chip 230 was exported a plurality of gray scale voltages of the 1st viewing area 240 correspondences, source electrode, the drain electrode of this gray scale voltage by this field effect transistor 270 is provided to this data line 214, and source electrode, the drain electrode of the thin film transistor (TFT) 216 by the 1st viewing area 240 write corresponding pixel electrode 218 again.
B. the 1st scanning drive chip 250 quits work, it exports a trigger pip to the 2 scanning drive chip 250 and these controllers 290, this sweep trace 212 of a plurality of sweep signals to the of the 2nd scanning drive chip 250 outputs 2 viewing areas 240, these controller 290 outputs the 2nd control voltage V simultaneously
2(V
2＞V
1) to the grid of this field effect transistor 270, this moment, this data driving chip 230 was exported a plurality of gray scale voltages of the 2nd viewing area 240 correspondences, source electrode, the drain electrode of this gray scale voltage by this field effect transistor 270 is provided to this data line 214, and source electrode, the drain electrode of the thin film transistor (TFT) 216 by the 2nd viewing area 240 write corresponding pixel electrode 218 again.
……
C. n-1 scanning drive chip 250 quits work, it exports a trigger pip to n scanning drive chip 250 and this controller 290, the a plurality of sweep signals of these n scanning drive chip 250 outputs are to this sweep trace 216 of n viewing area 240, and this controller 290 output n control voltage V simultaneously
n(V
n＞V
N-1) to the grid of this field effect transistor 270, this moment, this data driving chip 230 was exported a plurality of gray scale voltages of these n viewing area 240 correspondences, source electrode, the drain electrode of this gray scale voltage by this field effect transistor 270 is provided to this data line 214, and source electrode, the drain electrode of the thin film transistor (TFT) 216 by this n viewing area 240 write corresponding pixel electrode 218 again.
To this n scanning drive chip 250 duration of work successively, these controller 290 corresponding outputs are the 1st to n control voltage V of increase successively at the 1st scanning drive chip 250
1..., V
nTo the grid of this field effect transistor 270, the conducting degree of this field effect transistor 270 is increased gradually, and its decrease to gray scale voltage reduce gradually.
In sum, this control circuit 260 reduced this gray scale voltage at data driving chip 230 output gray scale voltages before this viewing area 240, and decrease reduces with the increase of the distance of viewing area 240 gradually with this data driving chip 230, it is more that thereby the gray scale voltage that makes the viewing area 240 of contiguous this data driving chip 230 be provided is reduced by this field effect transistor 270, and the gray scale voltage that is provided away from the viewing area 240 of this data driving chip 230 reduces less.
In addition, owing to gray scale voltage can take place to reduce in the transmission course on this data line 214 once more, and the gray scale voltage of the viewing area 240 of contiguous this data driving chip 230 reduces less in transmission course, reduces more away from the gray scale voltage of the viewing area 240 of this data driving chip 230.Thereby the gray scale voltage of each viewing area 240 correspondence reduces to reach unanimity through twice, and then promotes the display quality of this LCD 200.
Claims (10)
1. LCD, it comprises a display panels, at least one scanning drive chip and at least one data driving chip, this scanning drive chip is used for scanning this display panels, one of the display panels of the corresponding scanning of one scan chip for driving zone definitions is a viewing area, this data driving chip is used for exporting a plurality of gray scale voltages to this viewing area during a viewing area is scanned, it is characterized in that: this LCD also comprises a control circuit, be used for before this gray scale voltage is provided to this viewing area, adjusting this gray scale voltage, the adjustment amount of the pairing gray scale voltage in different viewing areas and the summation of the decrease in the transport process are consistent.
2. LCD as claimed in claim 1 is characterized in that: this control circuit is to reduce this gray scale voltage to the adjustment of this gray scale voltage, and the decrease of gray scale voltage reduces with the increase of the distance of data driving chip and viewing area.
3. LCD as claimed in claim 2 is characterized in that: this control circuit comprises a controller and a plurality of adjustment unit, and this adjustment unit is used for reducing gray scale voltage, and this controller is used for controlling this adjustment unit.
4. LCD as claimed in claim 3, it is characterized in that: this liquid crystal line shows that panel comprises one first substrate, the liquid crystal layer of one second substrate and between this first substrate and this second substrate, this first substrate comprises the parallel and data line that intersect with this sweep trace insulation of many parallel scanning beams, many, this sweep trace is connected to this scanning drive chip, this adjustment unit is a field effect transistor, its grid is connected to this controller, source electrode is connected to this data driving chip, and drain electrode is connected to this data line.
5. LCD as claimed in claim 4, it is characterized in that: this controller receives the trigger pip that is provided to the one scan chip for driving, corresponding output one controls voltage to the grid of this field effect transistor, and this control voltage increases with the distance of this data driving chip and viewing area.
6. LCD as claimed in claim 5, it is characterized in that: this LCD comprises n scanning drive chip, this display panels correspondence comprises n viewing area, each scanning drive chip is started working after receiving a trigger pip, the trigger pip that is provided to the 1st scanning drive chip is provided by an external circuit, be provided to this m (m=2,3 ... n) trigger pip of scanning drive chip is provided by the m-1 scanning drive chip.
7. the driving method of a LCD, this LCD comprises that one has the display panels of n viewing area, at least one data driving chip and a control circuit, the 1st to the n viewing area gradually away from this data driving chip, this driving method comprises the steps:
A. provide a plurality of sweep signals to a viewing area, this data driving chip produces a plurality of gray scale voltages of this viewing area correspondence;
B. this control circuit is adjusted this gray scale voltage, transmits this gray scale voltage to this viewing area.
8. the driving method of LCD as claimed in claim 7, it is characterized in that: in step b, this control circuit is to reduce this gray scale voltage to the adjustment of this gray scale voltage, and the decrease of gray scale voltage reduces with the increase of the distance of data driving chip and viewing area.
9. the driving method of LCD as claimed in claim 8, it is characterized in that: this control circuit comprises a controller and a plurality of field effect transistor, among this step b, this field effect transistor reduces this gray scale voltage, and the voltage of this controller by the grid of this field effect transistor of control input is to control this decrease.
10. the driving method of LCD as claimed in claim 9, it is characterized in that: among this step b, this controller receives the trigger pip that is provided to this scanning drive chip, output one controls voltage to the grid of this field effect transistor, and this control voltage increases with the increase of the distance of data driving chip and viewing area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610157450A CN100592371C (en) | 2006-12-08 | 2006-12-08 | Liquid crystal display device and its driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610157450A CN100592371C (en) | 2006-12-08 | 2006-12-08 | Liquid crystal display device and its driving method |
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| Publication Number | Publication Date |
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| CN101197110A true CN101197110A (en) | 2008-06-11 |
| CN100592371C CN100592371C (en) | 2010-02-24 |
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| CN200610157450A Active CN100592371C (en) | 2006-12-08 | 2006-12-08 | Liquid crystal display device and its driving method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102800281A (en) * | 2012-08-14 | 2012-11-28 | 昆山工研院新型平板显示技术中心有限公司 | Drive method and drive device for optimizing power dissipation of AMOLED panel |
| CN102013238B (en) * | 2009-09-08 | 2013-09-25 | 群康科技(深圳)有限公司 | Driving method of liquid crystal display |
| WO2013181861A1 (en) * | 2012-06-05 | 2013-12-12 | 深圳市华星光电技术有限公司 | Display panel and driving method of flat-panel display device |
| CN106257578A (en) * | 2015-06-22 | 2016-12-28 | 矽创电子股份有限公司 | Driving module and relevant driving method for display device |
| CN109003591A (en) * | 2018-09-28 | 2018-12-14 | 惠科股份有限公司 | driving voltage control system and display device |
| CN109192161A (en) * | 2018-10-08 | 2019-01-11 | 惠科股份有限公司 | Display driving method and device, display device |
| CN113096574A (en) * | 2017-11-30 | 2021-07-09 | 武汉天马微电子有限公司 | Display panel, display panel driving method and display device |
-
2006
- 2006-12-08 CN CN200610157450A patent/CN100592371C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013238B (en) * | 2009-09-08 | 2013-09-25 | 群康科技(深圳)有限公司 | Driving method of liquid crystal display |
| WO2013181861A1 (en) * | 2012-06-05 | 2013-12-12 | 深圳市华星光电技术有限公司 | Display panel and driving method of flat-panel display device |
| CN102800281A (en) * | 2012-08-14 | 2012-11-28 | 昆山工研院新型平板显示技术中心有限公司 | Drive method and drive device for optimizing power dissipation of AMOLED panel |
| CN102800281B (en) * | 2012-08-14 | 2015-07-15 | 昆山工研院新型平板显示技术中心有限公司 | Drive method and drive device for optimizing power dissipation of AMOLED panel |
| CN106257578A (en) * | 2015-06-22 | 2016-12-28 | 矽创电子股份有限公司 | Driving module and relevant driving method for display device |
| US10102819B2 (en) | 2015-06-22 | 2018-10-16 | Sitronix Technology Corp. | Driving module for display device and related driving method |
| CN113096574A (en) * | 2017-11-30 | 2021-07-09 | 武汉天马微电子有限公司 | Display panel, display panel driving method and display device |
| CN113096574B (en) * | 2017-11-30 | 2022-09-13 | 武汉天马微电子有限公司 | Display panel, display panel driving method and display device |
| CN109003591A (en) * | 2018-09-28 | 2018-12-14 | 惠科股份有限公司 | driving voltage control system and display device |
| CN109192161A (en) * | 2018-10-08 | 2019-01-11 | 惠科股份有限公司 | Display driving method and device, display device |
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| Publication number | Publication date |
|---|---|
| CN100592371C (en) | 2010-02-24 |
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