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. 13, 2007
Filed:
Mar. 03, 2003
Eiji Matsuda, Tenri, JP;
Seijirou Gyouten, Tenri, JP;
Hajime Washio, Sakurai, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In a shift register, which is for use in an image display apparatus of the TFT active matrix type in which a driver circuit is integrally provided on a display panel, and which is so arranged as to boost a start pulse SP to a start pulse SPO by using a level shifter, and to supply the start pulse SPO to a flip-flop Fof a shift register section, the start pulse SP having an amplitude lower than a driving voltage and being supplied thereto, the shift register is provided with an operation control circuit for inactivating the level shifter when the first stage flip-flop Foutputs an output signal Sand activates the level shifter when a last stage flip-flop Fn outputs an output signal Sn. Therefore, it is possible to reduce power consumption of the level shifter during a period in which the start pulse SPO is transmitted from a flip-flop Fto a flip-flop Fn−1.