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. 01, 2017
Filed:
Aug. 13, 2014
Applicant:
Oledworks Gmbh, Aachen, DE;
Inventors:
Christian Kalkschmidt, Aachen, DE;
Etienne Nicolaas Kathalijntje Paulus Marie Eberson, Echt, NL;
Alexander Rudolf Albrecht Isphording, Aachen, DE;
Harold Josef Gunther Radermacher, Aachen, DE;
Assignee:
OLEDWORKS GMBH, Aachen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 37/03 (2006.01); H05B 33/08 (2006.01); G01R 31/02 (2006.01); G01R 31/44 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0887 (2013.01); G01R 31/025 (2013.01); G01R 31/44 (2013.01); H05B 33/089 (2013.01); H05B 33/0896 (2013.01);
Abstract
A short detection circuit is provided for detecting a short circuit condition of an LED. A voltage threshold is set which is dependent on the LED operating current, such that there are at least two different voltage thresholds at two different LED operating currents. This means false detections can be reduced and the LED current operating range can be increased over which the short detection functions.