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:
Jun. 22, 2004
Filed:
Mar. 31, 2000
Masaaki Nishino, Shizuoka, JP;
NEC Corporation, Tokyo, JP;
Abstract
A liquid crystal display apparatus comprises a PLL circuit, a phase adjuster, a picture-data-sampling circuit, a liquid crystal display driver, a video signal processor, and a liquid crystal display panel. The phase adjuster comprises a delay circuit, a comparator, a counter, and a controller. The PLL generates a dot clock which is delayed by the delay circuit by a delay time designated by the controller to be a sampling clock. The counter counts the number of sampling edges of the sampling clock from a negative edge of a horizontal synchronization signal to a positive edge of a binarized video signal supplied from the comparator. The controller observes the number of sampling edges while adjusting the delay to determine the worst sampling clock and sets the best sampling clock whose phase is at a straight angle to the phase of the worst sampling clock.