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:
Mar. 04, 2014
Filed:
Oct. 28, 2009
Yoshio Fujimura, Ota, JP;
Hiroshi Iizuka, Honjou, JP;
Kazunari Kushiyama, Gunma-ken, JP;
Koudai Nakamura, Gunma-ken, JP;
Yuusuke Nishizaki, Gunma-ken, JP;
Kenpei En, Gunma-ken, JP;
Yoshio Fujimura, Ota, JP;
Hiroshi Iizuka, Honjou, JP;
Kazunari Kushiyama, Gunma-ken, JP;
Koudai Nakamura, Gunma-ken, JP;
Yuusuke Nishizaki, Gunma-ken, JP;
Kenpei En, Gunma-ken, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, Osaka, JP;
Sanyo Semiconductor Co., Ltd., Ora-Gun, Gunma, JP;
Abstract
A driver circuit is provided which comprises a series-connected unit having a light-emitting element and a current limiting inductor directly connected to the light-emitting element, a regenerative diode which is connected in parallel to the series-connected unit and which regenerates energy stored in the current limiting inductor, a transistor which controls a current flowing through the light-emitting element and the current limiting inductor, and a controller which controls an operation of the transistor, wherein the controller controls the transistor according to a voltage value of a power supply applied to the light-emitting element.