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Gate driving circuit

A technology of gate drive circuit and gate terminal, which is applied in the direction of electrical digital data processing, instrumentation, input/output process of data processing, etc. It can solve the problem of shutting down, shift registers cannot receive correctly, and output signals cannot be correctly received, etc. question

Active Publication Date: 2017-01-25
INNOLUX CORP
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Problems solved by technology

However, in the driving mechanism of the touch panel, a period of time must be reserved as a touch sensing period to sense the user's touch on the touch panel.
During touch sensing, the gate circuit must suspend operation. As a result, the shift register may not be able to correctly receive the output signal of the upper-stage shift register and be activated, or it may not be able to correctly receive the next-stage shift register. register output signal is turned off while the

Method used

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[0038] figure 2 It is a schematic diagram of the display cycle of the embedded touch panel and the non-embedded touch panel. Based on the frame (FRAME) period of the scanning frequency (frame rate) of the liquid crystal display (frame rate) 1 / 60 second (screen update frequency: 60Hz), the embedded touch panel must use part of the time as the touch detection cycle to sense the user's touch situation. Because the drive mode of the multiple shift registers in the current gate drive circuit is triggered by the output signal of the shift register located in the previous stage (for example, the N-1th stage) of the touch detection cycle to trigger the stage after the touch detection cycle ( For example, it is the shift register of the Nth stage), and the output signal of the shift register of the next stage (for example, the Nth stage) of the touch detection cycle is sent back to the stage before the touch detection cycle (for example, it is the N-1st stage ) of the shift register...

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Abstract

The invention provides a gate driving circuit for an in-cell touch panel to improve the issue wherein the undesired falling time of a pre-stage shift register and the undesired rising time of a next-stage shift register during a touch sensing period, in which the undesired falling time and the undesired rising time are caused by the output signal of the shift register cannot be correctly transmitted to the pre-stage shift register and the next-stage shift register during the touch sensing period.

Description

technical field [0001] The invention relates to a shift register, in particular to a shift register in an embedded touch panel. Background technique [0002] Shift registers are widely used in data driving circuits and gate driving circuits to respectively control the timing of sampling data signals for each data line and generate scanning signals for each gate line. In the data driving circuit, the shift register is used to output a selection signal to each data line, so that image data can be sequentially written into each data line. On the other hand, in the gate driving circuit, the shift register is used to generate a scan signal to each gate line for sequentially writing the image signals supplied to each data line into each pixel. [0003] Generally, a gate driving circuit of a non-touch panel includes a plurality of shift registers, wherein each shift register receives an output signal from an upper-stage shift register as an activation signal of the shift register....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG06F3/041G09G3/3677
Inventor 吴峻甫许文财江建学连伟光
Owner INNOLUX CORP
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