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:
Nov. 22, 2011
Filed:
May. 23, 2006
Takeshi Masuda, Ikoma, JP;
Atsuyuki Tanaka, Tenri, JP;
Yukihiro Sumida, Yamatokoriyama, JP;
Tokihiko Shinomiya, Nara, JP;
Takeshi Masuda, Ikoma, JP;
Atsuyuki Tanaka, Tenri, JP;
Yukihiro Sumida, Yamatokoriyama, JP;
Tokihiko Shinomiya, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A control circuit changes the ratio of an illumination period to a non-illumination period in a frame period of a backlight according to a gradation level in the one frame period of an image displayed on a liquid crystal panel in such a manner that the higher the gradation level, the backlight illumination control circuit increases the ratio of the illumination period to the non-illumination period in the frame period of the backlight, and the lower the gradation level, the backlight illumination control circuit decreases the ratio of the illumination period to the non-illumination period in the frame period of the backlight and thereby controls illumination intensity toward the liquid crystal panel. A time center of illumination intensity in each one frame period of the backlight is controlled in order that the time center exists in a constant temporal position from the beginning of each frame period.