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:
Sep. 21, 2004
Filed:
Jun. 20, 2001
Applicant:
Inventors:
Assignee:
Winbond Electronics Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 3/36 ;
U.S. Cl.
CPC ...
G09G 3/36 ;
Abstract
A voltage reference circuit and method for producing a voltage as a reference voltage for a liquid crystal display (LCD) panel. The voltage reference circuit with controllable temperature coefficients includes a logic operation unit and a voltage selection circuit. The logic operation unit receives a command corresponding to the temperature coefficient of an LCD panel and provides a selection signal according to the command. The selection signal is applied to the voltage selection circuit. Depending on the selection signal, the voltage selection circuit generates a selected voltage which is used to produce a reference voltage.