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:
Dec. 08, 2009
Filed:
Jul. 19, 2006
Hisaharu Oura, Kumamoto, JP;
Hisaharu Oura, Kumamoto, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
The present invention provides an image processing circuit capable of performing overdrive processing on all gray-scale while suppressing the degradation of the contrast of a liquid crystal display. According to the present invention, an image processing circuit for a liquid crystal display performing overdrive processing includes a data compression circuit for compressing the gray-scale of image data in the direction of medium gray-scale with a predetermined data compression ratio and outputting compressed data, an FRC processing circuit for performing pseudo-gray-scale processing on the compressed data and outputting pseudo-gray-scale image data having the same number of gray-scale as the number of gray-scale of the image data and an overdrive processing circuit for setting the voltage difference between the highest gray-scale and the lowest gray-scale of the pseudo-gray-scale image data to be greater than the voltage difference between the highest gray-scale and the lowest gray-scale of the compressed data, assigning a new voltage in the region of the gray-scale difference between the image data and the compressed data and utilizing the new voltage for overdriving processing.