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:
Jan. 06, 2009
Filed:
Oct. 19, 2005
Yasuyuki Doi, Nagaokakyo, JP;
Tetsuro Oomori, Hirakata, JP;
Kazuyoshi Nishi, Muko, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A source driverA arranged on a liquid crystal panel includes therein in-chip reference voltage wiresextending from one end to the other end of an LSI chip. The source driverA includes therein: branch reference voltage wiresbranching off from in-chip reference voltage wires; reference voltage production buffers; a control circuitfor controlling the reference voltage production buffers; a reference voltage production resistor sectionfor subdividing the reference voltage into values of n steps; voltage level selection circuitseach for selecting one of the subdivided voltages; and output buffers. Since the reference voltages are supplied to each source drivervia wiring for connecting the in-chip reference voltage wiresin series with one another, the wiring structure for supplying the reference voltages can be simplified.