CN101968952A - Method for improving picture quality of GIP (Gate-in-Panel) liquid crystal display panel - Google Patents
Method for improving picture quality of GIP (Gate-in-Panel) liquid crystal display panel Download PDFInfo
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- CN101968952A CN101968952A CN 201010241114 CN201010241114A CN101968952A CN 101968952 A CN101968952 A CN 101968952A CN 201010241114 CN201010241114 CN 201010241114 CN 201010241114 A CN201010241114 A CN 201010241114A CN 101968952 A CN101968952 A CN 101968952A
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Abstract
The invention relates to a method for improving the picture quality of a GIP (Gate-in-Panel) liquid crystal display panel, which is characterized in that a changeover switch is additionally arranged between a TFT (Thin Film Transistor) power-on voltage VDD and a TFT power-off voltage Vss of a GIP unit on a printed circuit board, so that the voltage of VDD is switched to a conducting wire of Vss and is output to the GIP unit when the liquid crystal display panel is powered off, and each scan line outputs the TFT power-on voltage VDD, the Vss voltage is equal to the VDD voltage and is input to each SR (Scanning Radiometer) unit through an array substrate to neutralize the voltage of pixels. The voltage value supplied to the conducting wire of Vss is switched to VDD by controlling the switch unit between VDD and Vss, so that the voltages input to all scan lines during power-off are VDD to turn on all TFT, and the purpose of improving a residual image is achieved without changing the design of the array substrate.
Description
Technical field
The present invention relates to a kind of LCD Technology, especially a kind of liquid crystal display Driving technique, specifically a kind of method of improving GIP display panels image quality.
Background technology
At present, GIP(Gate In Panel) be that a scanning chip is integrated in the technology on the TFT-LCD panel, can reach and save the scanning chip, reduce the purpose of liquid crystal panel cost.The all corresponding shift register SR(Shift Register of each root sweep trace) unit; As shown in Figure 1.
For each shift register SR unit, its basic framework is as shown in Figure 2: comprise pull-up unit and drop-down unit, the effect of pull-up unit is that the output vdd voltage is to sweep trace G (n) when TFT TA opens, and the driven sweep line is to open the TFT on the sweep trace; The effect of drop-down unit be TFT TB when opening to G (n) output TFT shutoff voltage Vss, to turn-off the TFT on the sweep trace G (n).
The time of TA and TB is opened or closes in control module control, makes the output of sweep trace SR satisfy the sequential requirement of driven sweep line, and promptly VDD and Vss alternately input on the sweep trace G (n).
TFT open voltage VDD and pass voltage Vss are provided by the power supply chip on printed-wiring board (PWB) (the Print Circuit Board) PCB, and offer each SR unit of GIP module by the cabling on the array base palte.
In sum, for liquid crystal panel, after shutdown, the voltage in the pixel can only be by the semiconductor layer discharge of TFT, and the time that needs is long, so panel still shows image, and image retention promptly shuts down.When using the scanning chip, can the TFT in the panel all be opened, make the voltage of whole pixels carry out the polarity neutralization, reach the purpose of rapid discharge, thereby improve the phenomenon of image retention by the gated sweep chip.But be to use the GIP technology, can not pass through the SR that signal controlling is all, make it discharge, so image retention can be serious when using the scanning chip.In the prior art, power supply chip produces VDD and Vss is input to the GIP module by array base palte, and the GIP module comprises a plurality of SR unit, drives every sweep trace, as shown in Figure 3.
Summary of the invention
The objective of the invention is at existing shutdown Disabled picture to lead the problem of machine image quality reduction in the existing liquid crystal display pixel, invent and a kind ofly can in time eliminate shutdown Disabled picture, the method for raising image quality.
Technical scheme of the present invention is:
A kind of method of improving GIP display panels image quality, it is characterized in that TFT open voltage VDD by being provided to the GIP unit at printed circuit board (PCB) and TFT close between the voltage Vss increases change-over switch, make liquid crystal panel when shutdown, the voltage of VDD is switched on the cabling of Vss, be input to the GIP unit, make every sweep trace all export TFT open voltage VDD, make Vss voltage equal vdd voltage, and be input to each SR unit by array base palte, voltage to pixel carries out neutralization, thereby reach the purpose of eliminating the shutdown image retention, improve the demonstration image quality of GIP display panels.
Open voltage VDD and TFT that described change-over switch is overlapped on TFT close between the voltage Vss.
Beneficial effect of the present invention:
The present invention provides a switching signal in the liquid crystal panel shutdown, by the switch element between control VDD and the Vss, make the magnitude of voltage that provides to the Vss cabling switch to VDD, then can make the voltage that is input on all sweep traces in shutdown, be VDD, open all TFT, thereby reach the purpose of improving image retention.And do not need to change the design of array base palte.
The present invention has solved the problem of shutdown Disabled picture preferably, fundamentally improves and improved image quality.
Description of drawings
Fig. 1 is the synoptic diagram of GIP shift register cell related to the present invention.
Fig. 2 is the synoptic diagram of SR unit related to the present invention.
Fig. 3 is existing driving electrical schematic diagram.
Fig. 4 is that the present invention drives electrical schematic diagram.
Fig. 5 is the synoptic diagram of change-over switch of the present invention.
Equivalent electrical circuit when Fig. 6 is a liquid crystal panel operate as normal of the present invention.
Equivalent electrical circuit when Fig. 7 is liquid crystal panel of the present invention shutdown.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Shown in Fig. 4-7.
A kind of method of improving GIP display panels image quality, its TFT open voltage VDD by being provided to the GIP unit at printed circuit board (PCB) and TFT close between the voltage Vss and increase change-over switch, make liquid crystal panel when shutdown, the voltage of VDD is switched on the cabling of Vss, be input to the GIP unit, make every sweep trace all export TFT open voltage VDD, make Vss voltage equal vdd voltage, and be input to each SR unit by array base palte, voltage to pixel carries out neutralization, thereby reach the purpose of eliminating the shutdown image retention, improve the demonstration image quality of GIP display panels.
As shown in Figure 4, the present invention is adding a change-over switch unit between VDD and Vss on the basis of prior art (Fig. 3), and concrete switch element structure can adopt structure as shown in Figure 5.In the liquid crystal panel operate as normal, switch 1 closure provides Vss to be input to the GIP module by power supply chip, and switch 2 is in off-state always, and its equivalent electrical circuit as shown in Figure 6.In the time of the liquid crystal panel shutdown, switch 1 disconnects, and promptly the voltage of Vss is no longer provided by original circuit, and switch 2 closures make former Vss voltage equal vdd voltage, are input to the GIP unit simultaneously; Then be input to the VDD of sweep trace G (n) by the GIP units alternately and the magnitude of voltage of Vss all becomes VDD, this moment, the TFT of all sweep traces all was in open mode, reached the purpose of charging neutrality on the pixel, improved image retention.Its equivalent circuit diagram as shown in Figure 7.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (2)
1. method of improving GIP display panels image quality, it is characterized in that TFT open voltage VDD by being provided to the GIP unit at printed circuit board (PCB) and TFT close between the voltage Vss increases change-over switch, make liquid crystal panel when shutdown, the voltage of VDD is switched on the cabling of Vss, be input to the GIP unit, make every sweep trace all export TFT open voltage VDD, make Vss voltage equal vdd voltage, and be input to each SR unit by array base palte, voltage to pixel carries out neutralization, thereby reach the purpose of eliminating the shutdown image retention, improve the demonstration image quality of GIP display panels.
2. the method for improving GIP display panels image quality according to claim 1 is characterized in that described change-over switch is overlapped between the open voltage VDD and TFT pass voltage Vss of TFT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010241114 CN101968952A (en) | 2010-07-30 | 2010-07-30 | Method for improving picture quality of GIP (Gate-in-Panel) liquid crystal display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010241114 CN101968952A (en) | 2010-07-30 | 2010-07-30 | Method for improving picture quality of GIP (Gate-in-Panel) liquid crystal display panel |
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| CN101968952A true CN101968952A (en) | 2011-02-09 |
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| CN 201010241114 Pending CN101968952A (en) | 2010-07-30 | 2010-07-30 | Method for improving picture quality of GIP (Gate-in-Panel) liquid crystal display panel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543027A (en) * | 2012-02-10 | 2012-07-04 | 福建华映显示科技有限公司 | Circuit structure and display device thereof |
| CN106097994A (en) * | 2016-06-15 | 2016-11-09 | 苏州众显电子科技有限公司 | The method improving GIP display panels image quality |
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| CN101131487A (en) * | 2006-08-25 | 2008-02-27 | 群康科技(深圳)有限公司 | Power supply circuit and LCD using the same |
| US20080303775A1 (en) * | 2007-06-08 | 2008-12-11 | Innocom Technology(Shenzhen) Co., Ltd.; Innolux Display Corp. | Liquid crystal display having logic converter for controlling pixel units to discharge |
| CN101546529A (en) * | 2008-03-28 | 2009-09-30 | 群康科技(深圳)有限公司 | Liquid crystal display device |
| CN101710478A (en) * | 2009-11-25 | 2010-05-19 | 友达光电股份有限公司 | Shift register for overcoming shutdown ghosting image and method for eliminating shutdown ghosting image |
| CN101777320A (en) * | 2010-01-27 | 2010-07-14 | 友达光电（苏州）有限公司 | Ghost eliminating circuit, display and electronic device |
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2010
- 2010-07-30 CN CN 201010241114 patent/CN101968952A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101131487A (en) * | 2006-08-25 | 2008-02-27 | 群康科技(深圳)有限公司 | Power supply circuit and LCD using the same |
| US20080303775A1 (en) * | 2007-06-08 | 2008-12-11 | Innocom Technology(Shenzhen) Co., Ltd.; Innolux Display Corp. | Liquid crystal display having logic converter for controlling pixel units to discharge |
| CN101546529A (en) * | 2008-03-28 | 2009-09-30 | 群康科技(深圳)有限公司 | Liquid crystal display device |
| CN101710478A (en) * | 2009-11-25 | 2010-05-19 | 友达光电股份有限公司 | Shift register for overcoming shutdown ghosting image and method for eliminating shutdown ghosting image |
| CN101777320A (en) * | 2010-01-27 | 2010-07-14 | 友达光电（苏州）有限公司 | Ghost eliminating circuit, display and electronic device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543027A (en) * | 2012-02-10 | 2012-07-04 | 福建华映显示科技有限公司 | Circuit structure and display device thereof |
| CN102543027B (en) * | 2012-02-10 | 2015-08-26 | 福建华映显示科技有限公司 | Circuit structure and display device thereof |
| CN106097994A (en) * | 2016-06-15 | 2016-11-09 | 苏州众显电子科技有限公司 | The method improving GIP display panels image quality |
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Application publication date: 20110209 |