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:
Apr. 02, 2013
Filed:
Nov. 18, 2009
Applicants:
Je-hao Hsu, Hsin-Chu, TW;
Wen-pin Chen, Hsin-Chu, TW;
Chiu-mei Yu, Hsin-Chu, TW;
Lee-hsun Chang, Hsin-Chu, TW;
Inventors:
Je-Hao Hsu, Hsin-Chu, TW;
Wen-Pin Chen, Hsin-Chu, TW;
Chiu-Mei Yu, Hsin-Chu, TW;
Lee-Hsun Chang, Hsin-Chu, TW;
Assignee:
AU Optronics Corp., Science-Based Industrial Park, Hsin-Chu, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/36 (2006.01); G09G 3/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
A shift register of an LCD device operates based on two clock signals and maintains the gate voltage of an output transistor switch using two pull-down transistor switches. The gate voltages of the pull-down transistor switches are switched periodically between the high and low level of the clock signals. During the output period, the transistor switches have negative gate-source voltages so as to reduce leakage.