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:
May. 20, 2014
Filed:
Aug. 16, 2012
Hong-jae Shin, Seoul, KR;
Chung-ah Lee, Seoul, KR;
Hong-Jae Shin, Seoul, KR;
Chung-Ah Lee, Seoul, KR;
LG Display Co., Ltd., Seoul, KR;
Abstract
Disclosed is a gate shift register, which can perform a bi-directional shift operation with a reduced number of switching devices. The gate shift register includes a plurality of stages to receive a plurality of gate shift clocks and sequentially output a scan pulse. A kstage includes a scan direction controller including first and second forward TFTs and first and second reverse TFTs to convert a scan direction in response to carry signals of previous stages input through first and second input terminals and carry signals of next stages input through third and fourth input terminals, a node controller including first to eighteenth TFTs to control charging and discharge operations of Q, Q, QBand QBnodes, and an output unit including first and second pull-up TFTs and first to fourth pull-down TFTs to output two scan pulses based on voltage levels of the Q, Q, QBand QBnodes.