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:
Oct. 27, 2009
Filed:
Apr. 25, 2006
Hsu-pin Kao, Pingjhen, TW;
Yi-sheng Yu, Taoyuan, TW;
Yi-chia Shan, Jhongli, TW;
Tsan-hung Tsai, Sanchong, TW;
Hsu-Pin Kao, Pingjhen, TW;
Yi-Sheng Yu, Taoyuan, TW;
Yi-Chia Shan, Jhongli, TW;
Tsan-Hung Tsai, Sanchong, TW;
Marketech International Corp., Taipei, TW;
Abstract
The present invention discloses a method and an apparatus for applying a dynamic contrast expansion technique to plasma display panels through performing a gamma conversion for the inputted image to convert the relationship of the brightness and gray level of the inputted image into a linear relation, performing a subtraction for the gray level value of the image to maintain the image at its smallest color deviation, analyzing the image property histogram to compute the maximum gray level and the minimum gray level required for carrying out the image contrast expansion and obtaining an image contrast expansion gain, and adopting an average of several previously inputted image contrast expansion gains and a current image contrast expansion gain as the contrast expansion gain used in the actual contrast expansion gain formula, so as to compute a new outputted gray level value after the image contrast expansion is performed.