The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 2019
Filed:
Nov. 29, 2017
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen, CN;
Xiaowen Lv, Shenzhen, CN;
Yifang Chou, Shenzhen, CN;
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Shenzhen, Guangdong, CN;
Abstract
The invention provides a GOA circuit, comprising a plurality of cascaded GOA units. Each GOA unit comprises: a pull up control module, an output module, a pull down module and a pull down maintenance module; for N-th GOA unit: the 41TFT of pull down module having a gate receiving a scan signal from (N+4)-th GOA unit, a source connected to a circuit start signal, and a drain connected to the first node, and the circuit start signal having a low voltage level lower than or equal to 0V and higher than the low voltage signal; so that when the scan signal from (N+4)-th GOA unit changing from high voltage to low voltage, the gate-source voltage difference of the 41TFT being negative to effectively reduce the current leakage and prevent the current leakage from affecting the first node voltage, improve circuit stability, facilitate cost reduction and narrow border.