Patent · US Active

Short detection circuit for an LED driver and short detection method

US9723685B2 · kind B2 · utility

1Cited by

0References

7Claims

0Family size

Assignee

OLEDWORKS GMBH · DE

Inventors

Christian Kalkschmidt · Aachen, DE
Etienne Nicolaas Kathalijntje Paulus Marie Eberson · Eindhoven, NL
Alexander Rudolf Albrecht Isphording · Aachen, DE
Harold Josef Gunther Radermacher · Stein, NL

Key dates

Filing date	Aug 13, 2014
Grant date	Aug 1, 2017
Priority date	—
Expiry date	Aug 13, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/30
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.