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1. (WO2018120321) GOA CIRCUIT, AND LIQUID CRYSTAL DISPLAY

Pub. No.:    WO/2018/120321    International Application No.:    PCT/CN2017/071243
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Tue Jan 17 00:59:59 CET 2017
IPC: G09G 3/36
Applicants: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
深圳市华星光电技术有限公司
Inventors: SHI, Longqiang
石龙强
Title: GOA CIRCUIT, AND LIQUID CRYSTAL DISPLAY
Abstract:
Disclosed is a GOA circuit, and liquid crystal display. The GOA circuit comprises: a pull-up circuit (11) comprising a first switch transistor (T1); a pull-down circuit (12) comprising a second switch transistor (T2); a scan output end (G(N)) coupled to between a second connection end of the first switch transistor (T1) and a first connection end of the second switch transistor (T2); and a clamp circuit (13) coupled to the first switch transistor (T1), a second connection end of the second switch transistor (T2), and control ends of the first switch transistor (T1) and second switch transistor (T2), wherein when the scan output end (G(N)) outputs a first voltage level, the voltage level of the control end of the second switch transistor (T2) is controlled to be lower than the voltage level of the second connection end of the second transistor (T2), and when the scan output end (G(N)) outputs a second voltage level, the voltage level of the control end of the first switch transistor (T1) is controlled to be lower than the voltage level of the second connection end of the first transistor (T1), the first voltage level being higher than the second voltage level. In this way, the present invention prevents a transistor from being incorrectly turned on or off because of a threshold drift, and accordingly prevents a circuit output error.