Patent · US Active

Method and device for determining life expectancy information of an LED module

US9572225B2 · kind B2 · utility

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0References

12Claims

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Assignee

SITECO BELEUCHTUNGSTECHNIK GMBH · DE

Inventors

Bernhard Wuppinger · Surberg, DE
Markus Rhein · Heidelberg, DE
Julia Pölzl · Siegsdorf, DE

Key dates

Filing date	Apr 15, 2016
Grant date	Feb 14, 2017
Priority date	—
Expiry date	Apr 15, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH05B45/58
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Various embodiments may relate to a method for determining life expectancy information of an LED module with a plurality of LEDs. The method includes detecting of forward biases of the LED module at instants of time which lie less than 100 ms apart from each other, comparing a currently detected forward bias with one or more earlier detected forward biases, in order to detect a voltage jump which reaches a minimum initial inverse voltage within a predetermined jump duration, wherein the minimum initial inverse voltage is at least 60 mV and the predetermined jump duration is less than 100 ms long, and determining life expectancy information based on one or more detected voltage jumps.

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