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. 24, 2007
Filed:
Sep. 16, 2004
Sachio Tsujino, Matsusaka, JP;
Hoh Riku, Matsusaka, JP;
Sachio Tsujino, Matsusaka, JP;
Hoh Riku, Matsusaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A level-shifter is combined with a bi-directional shift register. The level shifter turns a start signal of the bi-directional shift register to be an enable signal, and (i) activates a level shifting section by supplying a stationary current, during a period in which the enable signal is HIGH, while (ii) deactivates the level shifting section by cutting off the stationary current, during a period in which the enable signal EN is LOW. With this, it is possible to reduce unnecessary current consumption by a level shifter provided for a signal which does not frequently change, such as a shifting direction switching signal for which the bi-directional shift register is provided. At the same time, when such a signal changes, the change is followed with no time lag.