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:
Apr. 17, 2001
Filed:
Sep. 09, 1998
Hyong-Gon Lee, Seoul, KR;
Abstract
Liquid crystal displays include power supply control circuits and methods that are responsive to a single DC input supply voltage, to generate operating voltages for the gate driver, the data driver and the timing converter of the liquid crystal display from the single DC input supply voltage. Preferably, the data driver supply voltage and the gate driver supply voltage are generated prior to generating the gray scale voltage and the gate ON and OFF voltages. Also preferably, the timing converter supply voltage is generated prior to generating the gray voltage and the gate ON and OFF voltages. Accordingly, a single external power supply voltage may be used to generate the requisite supply and operational voltages for the components of the liquid crystal display. Moreover, the sequence of energizing the various components of the liquid crystal display may be automatically controlled, so that improper operation and/or failure of the liquid crystal display can be reduced and preferably prevented.