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. 01, 2015
Filed:
Mar. 14, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Makoto Onogi, Fujisawa, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A lighting apparatus for an image display apparatus is provided with: a plurality of light sources corresponding to a plurality of areas of a screen; and a control unit configured to control a duty ratio of a turn-on period and a turn-off period of each light source according to an image signal to be inputted, by carrying out pulse width modulation control on the turn-on periods of time and the turn-off periods of time of the plurality of light sources. In cases where the duty ratio of each light source is controlled according to the image signal to be inputted, the control unit regulates turn-on start timing of each light source in such a manner that a variation in the number of light sources which are turned on at the same time to be suppressed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile