Patent · US Active

System and method for output flux measurement of light emitting diode

US8471565B2 · kind B2 · utility

2Cited by

4References

7Claims

0Family size

Assignee

NXP B.V. · NL

Inventors

Viet Nguyen Hoang · Leuven, BE
Pascal Bancken · Opwijk, BE
Radu Surdeanu · Roosbeek, BE

Key dates

Filing date	Sep 3, 2010
Grant date	Jun 25, 2013
Priority date	—
Expiry date	Aug 2, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/2642
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method of estimating the output light flux of a light emitting diode, comprises applying a drive current waveform to the LED over a period of time comprising a testing period. The forward voltage across the LED is monitored during the testing period, and the output light flux is estimated as a function of changes in the forward voltage.

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