Patent · US Expired

Method for defining the color group of an LED and LED module

US6900471B1 · kind B1 · utility

11Cited by

2References

9Claims

0Family size

Assignee

OSRAM Opto Semiconductors GmbH · DE

Inventors

Markus Wicke · Regensburg, DE
Christian Hacker · Regensburg, DE
Burkard Wiesmann · Regensburg, DE
Joachim Reill · Bad Kötzting, DE

Key dates

Filing date	Apr 14, 2003
Grant date	May 31, 2005
Priority date	—
Expiry date	Aug 28, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG01N2201/0627
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Method for defining the color group of an LED which emits mixed-color, in particular white, light. The CIE color space is divided by means of a network with two sets of intersecting network lines, one set being provided by a set of Judd straight lines and the other set by the line for the color loci of a Planckian radiator and also the associated lines of constant threshold value deviation, so that the network has a plurality of network cells bounded by network lines. The color locus of the LED is determined, and the network cell is determined in which the color locus of the LED is located. The LED is assigned to the color group of the network cell.

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