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:
Jan. 27, 2015
Filed:
Aug. 23, 2011
Haixiang He, Guangdong, CN;
Wanchun Jiang, Guangdong, CN;
Martin Brueckel, Heidenheim, DE;
HU Wang, Guangdong, CN;
Haixiang He, Guangdong, CN;
Wanchun Jiang, Guangdong, CN;
Martin Brueckel, Heidenheim, DE;
Hu Wang, Guangdong, CN;
OSRAM AG, Munich, DE;
Abstract
A light emitting unit driving circuit may include: an operating voltage supplying unit configured to supply a voltage input for the driving circuit; a driving unit coupled to the operating voltage supplying unit and configured to drive the light emitting unit to make the light emitting unit turn on or turn off; and a feedback control unit coupled between the driving unit and the light emitting unit, and configured to form a feedback loop together with the driving circuit and the light emitting unit to stabilize an operating current of the light emitting unit.