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:
Jul. 17, 2012
Filed:
Aug. 18, 2008
Hiroyuki Ohkawa, Osaka, JP;
Shige Furuta, Osaka, JP;
Yasushi Sasaki, Osaka, JP;
Yuhichiroh Murakami, Osaka, JP;
Hiroyuki Ohkawa, Osaka, JP;
Shige Furuta, Osaka, JP;
Yasushi Sasaki, Osaka, JP;
Yuhichiroh Murakami, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
At least one embodiment of the present invention is directed to, even when external noise is applied to a shift register during all-on operation, preventing through-current from flowing in unit circuits and also to prevent increase in load on all-on control signal lines. When a high-level all-on control signal is provided to a unit circuit of a shift register, a transistor Tis brought into off-state, so that a transistor Tcannot output an on-voltage to a first output terminal. However, a transistor Tis brought into on-state, so that the first output terminal outputs an on-voltage to the exterior. On the other hand, a transistor Tis brought into on-state, so that a second output terminal outputs an off-voltage to a unit circuitin the next stage. At this time, the transistor Tis kept in off-state, so that no through-current flows to the transistors Tand T.