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:
Feb. 02, 2010
Filed:
Jul. 28, 2005
Seiji Sakai, Tokyo, JP;
Takuya Sakamoto, Kumamoto, JP;
Toshiyuki Yoneda, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Chiyoda-Ku, Tokyo, JP;
Abstract
A surface light source device includes light source driving means for driving light sources on a light emission block basis, a light exit area being sectioned into two or more light emission blocks, light quantity detecting means for detecting light quantities on the basis of output light beams that are led out from the two or more light emission blocks, and drive control means for adjusting emission light quantities of the light sources corresponding to the respective light emission blocks on the basis of light quantities that are detected during lighting periods when only one of the light emission blocks is lit up that are subjected to light quantity detection by the light quantity detecting means.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile