Gate driving circuit and driving method

Abstract

The invention discloses a gate driving circuit and a driving method. The gate driving circuit comprises a plurality of cascaded shift register circuits and touch noise reduction circuits arranged on the shift register circuits, wherein in the plurality of cascaded shift register circuits, at least one touch noise reduction circuit is arranged on every preset number of shift register units at intervals; the shift register circuit is configured to output a gate scanning signal to the display panel, the shift register circuit comprises an input circuit and an output circuit, and the output circuit is configured to input a clock control signal to the output end of the level in response to a signal of a pull-up node; and the touch noise reduction circuit is configured to input the clock signal to the output end of the level in response to a touch noise reduction signal. Therefore, the charging rate of the post-pit line of the product is consistent with that of the normal display line, the pit line problem is fundamentally solved, the risk that the reliability of the subsequent product is easy to cause badness is avoided, and the display quality of the product is ensured.

Description

technical field [0001] The present application generally relates to the field of display technology, and specifically relates to a gate drive circuit and a drive method. Background technique [0002] TDDI products (Touch and display Driver Integration), as a new generation of display touch technology, have first-class capacitive touch technology, thinner appearance and lower cost advantages. At present, they are widely used in mobile phones / TPCs, and will be introduced in the future Significant sizes gradually became popular. Now TDDI products tend to pursue higher resolution, higher refresh rate, and more sensitive touch effects, especially high-end products will also need to support active pens, which puts forward higher requirements for product charging rate design. [0003] At present, TDDI product Touch (touch) time adopts two kinds of long H and Long V. Long V mode is to do touch action in the blanking area of ​​one frame, which does not affect the display, but the t...

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Problems solved by technology

[0004] For Long H mode TDDI+GOA products, the key core of the above-mentioned product target requirements is the guarantee of product charging rate, especially the charging rate of the line after the touch pit is affected by the leakage in the pull-up and hold stage, and the corresponding output terminal waveform is distorted, resulting in the pixel line If the charging rate is insufficient, there will be gray scale differences with other display lines, which will cause poor equi-spaced horizontal lines (pit lines)

[0005] Studies have shown that the higher the resolution & refresh rate, the less the pixel charging time, and the better the touch effect, often requires more touch time, which is bound to further compress the charging time of each row in the display stage, but the longer the touch time Long, the longer the time of pulling the high level is maintained, the more leakage, the waveform attenuation and distortion of the output terminal, the insufficient charging time of the pixel, and the more prominent the defect

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