Invention Grant
- Patent Title: GOA circuit for LTPS-TFT
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Application No.: US14913991Application Date: 2016-01-28
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Publication No.: US09916805B2Publication Date: 2018-03-13
- Inventor: Yafeng Li , Jinfang Wu
- Applicant: Wuhan China Star Optoelectronics Technology Co., Ltd.
- Applicant Address: CN Wuhan, Hubei
- Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
- Current Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
- Current Assignee Address: CN Wuhan, Hubei
- Agent Leong C. Lei
- Priority: CN201510954368 20151217
- International Application: PCT/CN2016/072428 WO 20160128
- International Announcement: WO2017/101200 WO 20170622
- Main IPC: G09G3/36
- IPC: G09G3/36 ; G09G3/20

Abstract:
The invention provides a GOA circuit for LTPS-TFT, by adding the twelfth and thirteenth TFTs (T12, T13) controlled by output ends (G(n−1), G(n+1)) of (n−1)-th and (n+1)-th GOA units, the drain of twelfth TFT T12 connected through the fourth node (W1(n)) to source of first TFT (T1), the drain of first TFT (T1) connected to output end of (n−1)-th GOA unit, the drain of thirteenth TFT (T13) connected through the fifth node W2(n) to source of third TFT (T3), the drain of third TFT (T3) connected to output end of (n+1)-th GOA unit; the first and third TFTs (T1, T3) controlled respectively by the forward and backward scan DC control signals (U2D, D2U) to reduce leakage of twelfth TFT (T12) in forward scanning and leakage of thirteenth TFT (T13) in backward scanning. As such, the leakage in key TFTs is reduced and GOA circuit stability is improved.
Public/Granted literature
- US20180033389A1 GOA CIRCUIT FOR LTPS-TFT Public/Granted day:2018-02-01
Information query
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