GATE DRIVING CIRCUIT AND IN-CELL TOUCH DISPLAY DEVICE

摘要

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.

主权项

1. A gate driving circuit, for driving a pixel array, the gate driving circuit comprising:
a plurality of shift registers, the plurality of shift registers comprising a pre-stage shift register and an Nth shift register, a first clock signal provided to the Nth shift register and maintained at a the high logic level in a first time interval, a second clock signal provided to the pre-stage shift register and maintained at a high logic level in a second time interval, wherein a frame period of the gate driving circuit comprises a touch sensing period, and the touch sensing period corresponds to a period between the first time interval and the second time interval, the Nth shift register comprises:
a pull-up control circuit, receiving an output signal of the pre-stage shift register;a pull-up output circuit, coupled to the pull-up control circuit, the pull-up output circuit receiving the first clock signal and outputting a first output signal to serve as an output signal of the Nth shift register during a non-touch sensing period;a pull-down circuit, coupled to the pull-up output circuit and the pull-up control circuit, the pull-down circuit receiving an output signal of a next-stage shift register; anda trigger circuit, coupled to the pull-up output circuit and the pull-up control circuit, the trigger circuit receiving a touch sensing signal.