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:
Jun. 12, 2018
Filed:
Jan. 27, 2016
Wuhan China Star Optoelectronics Technology Co., Ltd., Wuhan, CN;
Shangcao Cao, Wuhan, CN;
WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Wuhan, Hubei, CN;
Abstract
The invention discloses a common circuit for GOA test and eliminating power-off residual images, including a first test end (), a test signal line (AT) connected to the first test end (), a second test end (), a feedback signal line (AT) connected to the second test end (), and the same number of test TFTs (T) as cascade GOA unit circuits. By connecting the gate of each test TFT (T) to test signal line (AT), the source to feedback signal line (AT) and the drain to the output end of corresponding GOA unit circuit and gate scan line, the invention can test the output signal of any stage GOA unit circuit to determine the location of a malfunctioning GOA unit circuit, and releasing the residual charges of the liquid crystal capacitor and storage capacitor at the display area of LCD panel when powering off to eliminate residual images.