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:
Aug. 14, 2012
Filed:
May. 25, 2005
Eui Yeol OH, Yongin-si, KR;
Hee Jung Hong, Seoul, KR;
Hee Jeong Park, Bucheon-si, KR;
LG Display Co., Ltd., Seoul, KR;
Abstract
A driving apparatus and method are presented to drive lamps that irradiate a liquid crystal display panel of a liquid crystal display device. A picture implementing period, during which a picture is implemented by the liquid crystal display device, and a shorter, scanning period before the picture implementing period are established. An output power supplied to the lamps to set a reference brightness is determined. A lamp driver changes a duty ratio and/or an amplitude of an AC signal supplied to the lamps to establish the reference brightness during the scanning period. The duty ratio/amplitude of the AC signal is adjusted dependent on the characteristics of the liquid crystal material in the liquid crystal display.