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:
Aug. 07, 2012
Filed:
Jul. 03, 2008
Atsuhito Murai, Osaka, JP;
Ryuji Miyama, Osaka, JP;
Kozo Takahashi, Osaka, JP;
Kenji Maeda, Osaka, JP;
Atsuhito Murai, Osaka, JP;
Ryuji Miyama, Osaka, JP;
Kozo Takahashi, Osaka, JP;
Kenji Maeda, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A gradation conversion unitperforms, on an input image, gradation conversion in which a predetermined gain is applied to a gradation smaller than a boundary gradation CVth and a characteristic becomes a spline curve for a gradation larger than the boundary gradation. To determine a characteristic of the gradation conversion unit, an image analysis unitobtains the boundary gradation CVth and a maximum gradation CVmax based on the input image, and determines a linear gain shift coefficient LGs so that the brightness decreasing rate of the maximum gradation CVmax when brightness control of a backlightis performed becomes a limit value or less. In such a manner, power consumption of the backlight is reduced while suppressing deterioration in picture quality.