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:
Aug. 18, 2015
Filed:
Jan. 11, 2012
Applicants:
Kengo Kimura, Niiza, JP;
Kazushige Hirata, Niiza, JP;
Toshihiro Nakano, Niiza, JP;
Inventors:
Assignee:
Sanken Electric Co., Ltd., Niiza-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/00 (2006.01); H05B 39/00 (2006.01); H05B 41/14 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0815 (2013.01); Y02B 20/348 (2013.01);
Abstract
An LED driving apparatus converts AC input power into predetermined DC output power and supplies the DC output power to an LED load. The LED driving apparatus includes a switching element Qto be turned on and off, a ripple current reducerthat is connected in series with the LED load and reduces current ripples of the LED load, and a controller CNT that turns on and off the switching element according to a feedback voltage taken from a connection point of the LED load and ripple current reducer, thereby controlling the DC output power to a predetermined value.