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Grid driving method, grid driving circuit and pixel structure

A gate drive circuit, gate drive technology, applied in the field of gate drive circuit and pixel structure, and gate drive method, can solve the problems of reducing the service life of TFT and increasing the power consumption of liquid crystal panel, so as to prolong the service life and relieve TFT gate bias problem, power saving effect

Active Publication Date: 2011-10-19
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a higher gate drive voltage is applied to the TFT of the pixel electrode of the negative polarity signal for a long time, the higher TFT gate bias will reduce the service life of the TFT, resulting in earlier, faster and larger TFT offset; and, also increases unnecessary LCD panel power consumption

Method used

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  • Grid driving method, grid driving circuit and pixel structure
  • Grid driving method, grid driving circuit and pixel structure
  • Grid driving method, grid driving circuit and pixel structure

Examples

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Effect test

Embodiment 1

[0046] The gate driving circuit provided in this embodiment includes a loading circuit, which is used for loading the first gate driving voltage on the gate of the pixel whose data driving voltage is a positive polarity signal, and loading the first gate driving voltage when the data driving voltage is a negative polarity signal. The gates of the pixels are loaded with a second gate driving voltage, wherein the first gate driving voltage is higher than the second gate driving voltage.

[0047] The gate drive circuit provided in this embodiment can be applied to the above four drive modes. By applying a second gate drive voltage with a lower voltage to the gate of a pixel whose data drive voltage is a negative polarity signal, the TFT The grid bias problem prolongs the service life of the TFT; compared with the prior art, the power consumed by loading the second grid driving voltage is small, which saves the power consumption of the liquid crystal panel.

Embodiment 2

[0049] figure 2 It is a schematic structural diagram of Embodiment 2 of the gate driving circuit of the present invention. Such as figure 2 As shown, this embodiment includes: a loading circuit 1 and a shift register 2 , wherein the shift register 2 is connected to the loading circuit 1 .

[0050] The loading circuit 1 is used for loading the first gate driving voltage on the gate of the pixel whose data driving voltage is a positive polarity signal, and loading the second gate driving voltage on the gate of the pixel whose data driving voltage is a negative polarity signal, The first gate driving voltage is higher than the second gate driving voltage, and the first gate driving voltage and the second gate driving voltage are obtained by the loading circuit 1 according to the third gate driving voltage output by the shift register 2 .

[0051] Specifically, the shift register 2 outputs the third gate driving voltage to the loading circuit 1, and the loading circuit 1 respe...

Embodiment 3

[0054] image 3 It is a schematic structural diagram of Embodiment 3 of the gate driving circuit of the present invention. image 3 Only the drive circuit for the pixel gates of the nth row is shown. Such as image 3 As shown, this embodiment specifically includes: a loading circuit 10 and a shift register 11, wherein the loading circuit 10 includes a first circuit 12 and a second circuit 13, wherein the first circuit 12 and the second circuit 13 are respectively connected to the shift register 11 .

[0055] The shift register 11 specifically includes TFT switching devices T1, T2, T3 and T4, wherein the gate and source of T1 are connected to the output signal of the n-1 row pixel gate drive circuit shift register; the source of T2 is connected to the The drain is connected, the gate of T2 is connected to the output signal of the shift register of the n+1 row pixel gate drive circuit, the drain of T2 is connected to the low-voltage signal Vss; the gate of T3 is connected to ...

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Abstract

The invention relates to a grid driving method, a grid driving circuit and a pixel structure. The grid driving method comprises the following steps of: loading first grid driving voltage on the grid of the pixel of which the data driving voltage is a positive-polarity signal, and loading second grid driving voltage on the grid of the pixel of which the data driving voltage is a negative-polarity signal, wherein the first grid driving voltage is higher than the second grid driving voltage. In the invention, different grid driving voltage is loaded on the grids of the pixels of the positive-polarity signal and the negative-polarity signal so as to meet charging requirements of the pixel electrodes of the positive-polarity signal and the negative-polarity signal; simultaneously, the lower second grid driving voltage is loaded on the grid of the pixel of the negative-polarity signal so as to effectively solve grid bias problem of a thin-film transistor (TFT) and prolong the service life of the TFT; compared with the prior art, the invention has the advantage that: the consumption power of loading the second grid driving voltage is low, so that the power consumption of a liquid crystalpanel is reduced.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a grid driving method, a grid driving circuit and a pixel structure. Background technique [0002] In the current traditional liquid crystal display, in order to prevent the aging phenomenon of the liquid crystal in the DC state for a long time, the data driving voltage provided by the data line to the pixel electrode is an AC signal. When the data driving voltage is higher than the common electrode voltage, the data driving voltage is called is a positive polarity signal, and when the data driving voltage is lower than the common electrode voltage, the data driving voltage is called a negative polarity signal. [0003] In a traditional liquid crystal display, no matter what kind of driving method is adopted, when the pixel of the thin film transistor (Thin Film Transistor, referred to as: TFT) is turned on, no matter whether the data driving voltage is a positive polarity sig...

Claims

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Application Information

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IPC IPC(8): G09G3/36
Inventor 马占洁
Owner BOE TECH GRP CO LTD
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