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. 08, 2008
Filed:
Sep. 03, 2004
Tomokazu Kojima, Osaka, JP;
Tsutomu Sakakibara, Shiga, JP;
Tooru Suyama, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A liquid crystal display device according to the present invention includes: a liquid crystal panel; a source driverfor controlling the gray-scale level by applying a voltage to the liquid crystal panel; a DC-DC power supplyfor driving the source driverby supplying current to the source driver; a controllerfor supplying a signal for controlling the gray-scale level to the source driver; and a variation calculatorfor calculating the amount of change in the signal from the controller. In the DC-DC power supply, current to be supplied to the source driverchanges in accordance with the amount of change in the signal calculated by the variation calculator