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. 16, 2017
Filed:
Feb. 13, 2014
Applicant:
Infineon Technologies Austria Ag, Villach, AT;
Inventors:
Xiaowu Gong, Singapore, SG;
Kok Kee Lim, Singapore, SG;
Assignee:
Infineon Technologies Austria AG, Villach, AT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 33/08 (2006.01); H05B 37/02 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0818 (2013.01); H05B 33/0815 (2013.01);
Abstract
Techniques are described for controlling an amount of current flowing through one or more light-emitting-diodes (LEDs), without sensing input and/or output voltage, so that the amount of current flowing through the one or more LEDs is approximately equal to a target current level. The techniques provide for coarse and fine tuning of the amount of time a transistor, through which the current flows, is turned on to control the amount of current flowing through the one or more LEDs.