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:
Sep. 10, 2013
Filed:
Nov. 19, 2010
Motohisa Ito, Chiba, JP;
Motohisa Ito, Chiba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image display apparatus having a display screen configured of a plurality of pixels includes a measurement unit adapted to measure a distribution of light amount when the display screen carries out a display, a detection unit adapted to detect a display problem region in the display screen based on an imbalance in the display screen of the distribution of the measured light amount when a uniform image is displayed in the display screen, and a correction unit adapted to perform correction on an image signal that is to be displayed in the display screen so as to suppress the influence of the display problem region on the display. The correction unit includes an expected value calculation unit, a difference value calculation unit adapted to calculate a difference value between an expected value of a distribution of light amount and a measured value of a distribution of light amount when an image based on the image signal corrected by the correction unit is displayed in the display screen, and a correction amount calculation unit adapted to calculate a correction amount for the display problem region detected by the detection unit based on the difference value.