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:
Feb. 23, 2021
Filed:
Sep. 14, 2018
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Guangdong, CN;
Wenying Li, Guangdong, CN;
Abstract
The GOA circuit includes multiple cascaded GOA units. An (n)th GOA unit includes pull-up control circuit, pull-up circuit, pull-down circuit, first pull-down holding circuit, and second pull down holding circuit. The pull-up control circuit receives an activation signal CT, and outputs a pull-up control signal Q(n). The pull-up circuit receives Q(n) and a first clock signal CK, and outputs an (n)th cascade signal ST(n) and an (n)th scan signal G(n). The pull-down circuit receives an (n+4)th cascade signal ST(n+4), a first DC low-voltage signal VSSG1, and a second DC low-voltage signal VSSQ2, and keeps Q(n) and G(n) at a turn-off state. The first pull-down holding circuit receives CK, ST(n), VSSG1, and VSSQ2, and keeps Q(n) and G(n) at the turn-off state. The second pull down holding circuit receives a second clock signal XCK, an (n−4)th cascade signal ST(n−4), and VSSG1, and keeps Q(n) and G(n) at the turn-off state.