Grid drive circuit, liquid crystal display device and electronic device

A technology of gate drive circuit and liquid crystal display device, which is applied to static indicators, instruments, etc., and can solve problems such as image color shift and current drive capability reduction
CN101046940AInactive Publication Date: 2007-10-03TPO DISPLAY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TPO DISPLAY
Publication Date
2007-10-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a grid drive circuit. It includes first shift register for outputting first signal, second shift register for outputting second signal, NAND gate, first switch device, second switch device, control unit and inverter. The NAND gate has two input ends which are respectively coupled with first signal and second signal. The input end of the first switch device is coupled with output end of NAND gate, the output end of second switch device is coupled with output end of first switch device, its input end is coupled with high voltage level. The control unit can output control signal, and is coupled with first switch device and second switch device. The input end of said inverter is coupled with output end of second switch device, and the output end of said inverter can output grid drive signal.
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Description

technical field

[0001] The invention relates to a gate drive circuit, in particular to a gate drive circuit which can solve the problem of afterimage after shutdown. Background technique

[0002] After the LCD screen is turned off, if the driving circuit design of the LCD screen is not good, there may be image afterimages, which will have a negative impact on the LCD screen in the long run. FIG. 1 is a schematic diagram of a known liquid crystal panel used to solve the residual image after shutdown of the liquid crystal screen. In FIG. 1 , the TFT array 10 is controlled by a gate driving circuit 12 and a data driving circuit 11 , and in order to solve the problem of image sticking after power-off, the gate driving circuit 12 is coupled to a control circuit 15 to eliminate the problem of image sticking after power-off. In the control circuit 15, the voltage VDD output by the voltage converter 14 is used to charge the capacitor 106 when the LCD screen is turned on. When the L...

Claims

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