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:
Feb. 03, 2009
Filed:
Dec. 07, 2004
Hidekazu Kojima, Kyoto, JP;
Hidekazu Kojima, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
In a drive unit for use with a matrix type display, a buffer circuit of the power supply circuit of the drive unit has an high-voltage first output circuit and a low-voltage second output circuit for generating the same output voltage under a normal operating condition, wherein the high-voltage output circuit has enhanced capability of providing output current to bring up the output voltage and the low-voltage output circuit has enhanced capability of providing output current to bring down the output voltage. A voltage detected at a node connected to the output end of the buffer circuit is compared with a bias voltage. Based on the comparison, the outputs of the first and second output circuits are switched over from one to the other as it is supplied to the display.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile