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. 11, 2015
Filed:
May. 15, 2012
Kazuhiro Matsubayashi, Yokohama, JP;
Kazuhiro Matsubayashi, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A target value of a contrast ratio of an image display apparatus is set, and the number of levels, among which the luminance of a backlight is changed over, and each level of luminance are decided according to the target value of the contrast ratio. The backlight is made to emit light at the individual levels of luminance of the backlight thus decided, and at the same time, the image display apparatus is made to display a predetermined color chart thereon, so that color measurement is thereby carried out, and calibration is carried out at each level of luminance of the backlight based on a color value thus measured. The calibration is carried out only on an appropriate number of levels of the luminance of the backlight required to achieve the target value of the contrast ratio.