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:
May. 21, 2013
Filed:
Mar. 25, 2008
Tatsuya Uchikawa, Tokyo, JP;
Satoshi Hosokawa, Tokyo, JP;
Tatsuya Uchikawa, Tokyo, JP;
Satoshi Hosokawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Luminance levels of a backlightcorresponding to gradations of a display image are registered as reference luminance values to a table, signal levels of a drive signal to an LED drivercorresponding to reference luminance values are registered as luminance setting values to a table, and values to correct a drive level of a liquid-crystal panel corresponding to gradations of the display image are registered as gamma correction values to a table. According to the gradation of an image to be displayed, a signal level of the drive signal corresponding to the reference luminance value attained from the tableis obtained from the table, to thereby drive the LED driver; and an LCD driveris driven by a value obtained through correction by the gamma correction value obtained from the table, to thereby display an image.