Chipone Technology (beijing) Co., Ltd.

Tianhao Chen

Youqiao Xie

Ziming Fang

Junjie Wu

Disclosed is an circuit for preventing latch-up, comprising a first transistor, a second transistor of a type opposite to that of the first transistor, and a control circuit, wherein a control terminal of the first transistor receives a first control voltage and a first terminal of the first transistor receives a first supply voltage; a control terminal of the second transistor receives a second control voltage, and is connected to a second terminal of the first transistor; a first terminal of the second transistor is connected to the control terminal of the first transistor, and a second terminal of the second transistor receives a second supply voltage. The control circuit is coupled on a path formed by the first transistor and the second transistor between the first supply voltage and the second supply voltage for disconnecting the path when the first control voltage and/or the second control voltage is out of a predetermined range. The circuit for preventing latch-up provided by the present invention, by introducing the control circuit on the path formed by the first transistor and the second transistor between the first supply voltage and the second supply voltage, can disconnect the path when the first control voltage and/or the second control voltage is out of the predetermined range, so that a latch-up effect is prevented from occurring during power-on phase.

Circuit for preventing latch-up and integrated circuit

Disclosed is a driving circuit for driving a display panel, comprising: a timing controller for providing a start pulse signal and a selection signal; a driving module comprising a plurality of cascaded driver units and configured to control a part of the driver units to receive the start pulse signal according to the selection signal and generate a grayscale voltage according to the start pulse signal and the data signal. In the driving circuit according to the present disclosure, the driving module selects a part of the driver units to receive the start pulse signal according to the selection signal, so that the resolution of the display panel can be arbitrarily changed without exceeding an intrinsic physical resolution, thus reducing research and development cost and cumbersome processes for customization, and speeding up shipment.

Driving circuit, driving method and display device

This application discloses a touch display control apparatus and a touch display apparatus. The touch display control apparatus comprises: a touch control module for touch detection, wherein the touch control module comprises touch detection channels, and performs the touch detection according to touch sensing signals received through the touch detection channels; a display control module for display control, wherein the display control and touch detection are performed in time sharing manner; selection modules for selectively connecting the touch detection channels or a common voltage signal to a touch display panel, wherein nodes connecting the selection modules and the touch display panel are compensation nodes, the touch display control apparatus further comprises compensation modules respectively connected to the compensation nodes, each compensation module counteract an interference voltage coupled to a corresponding compensation node when the interference voltage exceeds a preset value, thereby avoiding a horizontal or vertical stripe in displayed images.

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Beijing, China

Tianhao Chen