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:
Mar. 08, 2022
Filed:
Feb. 25, 2020
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Guangdong, CN;
Longqiang Shi, Guangdong, CN;
Abstract
The present invention discloses an external compensation GOA circuit and a display panel. By adding a random detection signal output branch, a first output waveform of a scan signal line fulfilling normal driving is outputted in a normal time, and a second output waveform of the scan signal line fulfilling blanking time random detection is outputted in a blanking time, such that randomly detecting a threshold voltage of the drive transistor by using the blanking time of the scan signal can be achieved to further achieve external real time compensation of the threshold voltage shift, enhance uniformity of screen image display, and improve a lifespan of the display panel.