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Gate driving circuit

A gate drive circuit and circuit technology, applied in electrical digital data processing, instruments, computing, etc., can solve problems such as reducing product reliability, increasing leakage current, affecting the quality of touch display, avoiding leakage, improving The effect of reliability

Pending Publication Date: 2019-11-08
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the touch detection action occurs, the scanning action of the gate drive signal may need to be stopped, and the electronic components in the gate drive circuit may be biased at a relatively high voltage value for a long time
The above-mentioned high-voltage bias state, accumulated for a long time, may cause the deterioration of electronic components (transistors), reduce the conduction voltage of the transistors, increase the possible leakage current, and affect the touch display quality of work, reducing the reliability of its products

Method used

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Embodiment Construction

[0041] Please refer to figure 1 , figure 1 A schematic diagram of a gate driving circuit according to an embodiment of the present invention is shown. The gate drive circuit includes a plurality of shift register circuits coupled in series, wherein the shift register circuit 100 of the Nth stage includes a direction selection circuit 110, a pull-up circuit 120, a pull-down circuit 130, an output stage circuit 150 and a leakage resistance circuit. Element 140. The direction selection circuit 110 is coupled to the first driving terminal DE1. The direction selection circuit 110 receives the front gate driving signal SR_T[N-1], the rear gate driving signal SR_T[N+1], the first scanning direction signal U2D_LH and the second scanning direction signal D2U_LH, and according to the front gate The pole drive signal SR_T[N-1] and the subsequent gate drive signal SR_T[N+1] are used to select the first scan direction signal U2D_LH or the second scan direction signal D2U_LH to generate ...

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Abstract

A gate driving circuit comprises serially coupled shift register circuits. The N-th shift register circuit comprises a direction selection circuit, a pull-up circuit, a pull-down circuit, an output level circuit, and a leakage preventing element. The direction selection circuit generates a first drive signal on a first drive end. The pull-up circuit pulls up the first drive signal according to a clock pulse signal or a reset signal. The pull-down circuit pulls down the first drive signal so as to pull down a second drive signal. The pull-down circuit is provided with a pull-down driver, whichpulls down the first drive signal. The output level circuit generates an N-th gate drive signal according to the first drive signal and the second drive signal. The leakage preventing element providesa gate closing signal to the pull-down driver according to the first drive signal.

Description

technical field [0001] The present invention relates to a gate driving circuit, and in particular to a gate driving circuit of a touch display device. Background technique [0002] With the advancement of electronic technology, electronic devices have become important tools in people's lives. In today's electronic devices, it is an important issue to provide a high-quality touch display interface. [0003] In a touch display, in order to perform a display operation on the panel, a gate driving circuit needs to be provided to generate a gate driving signal and perform a display scanning operation on the panel. When the touch detection operation occurs, the scanning operation of the gate driving signal may need to be stopped, and the electronic components in the gate driving circuit may be biased at a relatively high voltage for a long time. The above-mentioned high-voltage bias state, accumulated for a long time, may cause the deterioration of electronic components (transis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G06F3/041
CPCG09G3/20G06F3/0412G06F3/0416G09G2310/0286
Inventor 蔡尧钧庄铭宏
Owner AU OPTRONICS CORP