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. 14, 2009
Filed:
Sep. 25, 2003
Shinichi Satoh, Tokyo, JP;
Shinichi Satoh, Tokyo, JP;
Oki Semiconductor Co., Ltd., Tokyo, JP;
Abstract
A drive of a display panel, according to the invention, comprises first switching means SEGfor changing over between connection of the respective data lines SWsm to the side of respective variable current sources and connection thereof to a grounding side, second switching means SWcfor changing over a potential of the respective scanning lines between a power supply potential Vand a grounding potential, a drive control circuit for controlling the first switching means and second switching means correspondingly to input data, a comparison circuit provided in each of the data lines, for outputting a control signal by comparing a potential from a voltage regulator with a potential of the respective data lines, and a current control circuit for controlling a current of the variable current source provided in each of the data lines based on results of comparison executed by the respective comparison circuit.