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. 14, 2010
Filed:
May. 11, 2007
Kazuhiro Arai, Daito, JP;
Yoshihiro Yokote, Hirakata, JP;
Ryuhei Amano, Hirakata, JP;
Masutaka Inoue, Hirakata, JP;
Kazuhiro Arai, Daito, JP;
Yoshihiro Yokote, Hirakata, JP;
Ryuhei Amano, Hirakata, JP;
Masutaka Inoue, Hirakata, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A light source controller includes a light source driver, a light amount sensor, a memory configured to store property information indicating a relationship between the drive current and the outgoing light amount for each level of the environmental temperature of the solid-state light source, and a controller configured to control the drive current supplied from the light source driver. The controller obtains the property information corresponding to the environmental temperature of the solid-state light source according to the relationship between the drive current and the outgoing light amount, and controls the drive current according to the obtained property information so as to bring the outgoing light amount close to a target light amount.