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. 27, 2014
Filed:
Jul. 22, 2011
Shigehiro Yanase, Matsumoto, JP;
Kenichi Shioiri, Matsumoto, JP;
Masahide Tsuda, Shiojiri, JP;
Osamu Saito, Matsumoto, JP;
Shigehiro Yanase, Matsumoto, JP;
Kenichi Shioiri, Matsumoto, JP;
Masahide Tsuda, Shiojiri, JP;
Osamu Saito, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A light source control device is for controlling a solid-state light source array having a plurality of solid-state light sources connected in series to each other, and includes a detector (a current detection resistor, voltage detection resistors, and operational amplifiers) adapted to detect at least one of a voltage applied to the solid-state light source array and a current supplied to the solid-state light source array, and a control circuit adapted to determine whether or not discontinuity of at least one of the voltage and the current is present using a detection result of the detector, and change control of one of the current and electrical power performed on the solid-state light source array if it is determined that the discontinuity is present.