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:
May. 24, 2016
Filed:
Jun. 11, 2012
Makoto Onogi, Fujisawa, JP;
Makoto Onogi, Fujisawa, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Disclosed is a backlight apparatus comprising a plurality of light sources; and a control unit which drives the plurality of light sources at an identical driving frequency and which performs pulse-width modulation control for a turned-on period and a turned-off period of each of the light sources; wherein the control unit is capable of setting a duty ratio for each of the light sources and each of driving cycles; and the control unit sets the duty ratio for at least two of the light sources respectively so that a condition, in which one cycle period composed of one turned-on period and one turned-off period is N times the driving cycle, is fulfilled, and the duty ratio is 0 or 1 in at least one driving cycle of N pieces of the driving cycles for constructing the one cycle period if N is not less than 2.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile