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. 02, 2011
Filed:
Oct. 29, 2008
Harald Sandner, Marzling, DE;
Christophe Vaucourt, Munich, DE;
Hans Schmeller, Woerth, DE;
Martin Rommel, Freising, DE;
Helmut Kiml, Tiefenbach, DE;
Harald Sandner, Marzling, DE;
Christophe Vaucourt, Munich, DE;
Hans Schmeller, Woerth, DE;
Martin Rommel, Freising, DE;
Helmut Kiml, Tiefenbach, DE;
Texas Instruments Deutschland GmbH, Freising, DE;
Abstract
A method for driving a light-emitting semiconductor is provided. A supply voltage is converted into a secondary output voltage for supplying the light-emitting semiconductor with an output voltage. A level for the supply voltage at the beginning of a high current phase of the light-emitting semiconductor is sensed. A threshold voltage level for the supply voltage level is determined based on the sensed level. The high current phase with the light-emitting semiconductor is stated. The sensed level is continuously compared with the threshold voltage level, and an output current through the light-emitting semiconductor is controlled such that the sensed level does not drop below the threshold voltage level.