Innolux Corporation

Wei-Kuang Lien

Wen-Tsai Hsu

Chun-Fu Wu

Sheng-Feng Huang

Chien-Hsueh Chiang

A touch display device at least including a gate driver is provided. The gate driver at least includes a pull-up control circuit, a pull-down control circuit and a pull-up output circuit. The pull-up control circuit sets the voltage level of a first node to a first voltage level. The pull-down control circuit is configured to set the voltage level of the first node to a second voltage level and includes a first transistor receiving an operation voltage. The second voltage level is lower than the first voltage level. The pull-up output circuit generates a scan signal according to the voltage level of the first node. During a first display period and a second display period, the operation voltage is equal to a first gate voltage. During a touch-sensing period, the operation voltage is equal to a second gate voltage that is lower than the first gate voltage.

Touch display device and gate driver thereof

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.

Gate driving circuit for driving a pixel array having a trigger circuit for receiving a touch sensing signal

A gate driving circuit includes a plurality of shift registers arranged to output the gate driving signals in sequence. The shift registers are divided into groups arranged in sequence, wherein the driving signal from a first one of a N+1group of shift registers is next to the driving signal from a first one of a Ngroup of shift registers; and at least one first compensation circuit connected to the last one of the Ngroup of shift registers and the first one of the N+1group of shift registers, wherein the first compensation circuit provides a first control signal to enable the last one of the Ngroup of shift registers to perform signal holding, and provides a second control signal to enable the first one of the N+1group of shift registers to perform pre-charging, wherein N is an integer greater than zero.

Growing community of inventors

Miao-Li County, Taiwan

Wei-Kuang Lien