Patent · US Active

Method for producing a plurality of LED illumination devices and a plurality of LED chipsets for illumination devices, and LED illumination device

US9115852B2 · kind B2 · utility

1Cited by

1References

15Claims

0Family size

Assignees

OSRAM Opto Semiconductors GmbH · DE
OSRAM GmbH · DE

Inventors

Markus Hofmann · Bad Abbach, DE
Ralph Bertram · Herzogenrath, DE
Julius Muschaweck · Gauting, DE

Key dates

Filing date	Dec 18, 2009
Grant date	Aug 25, 2015
Priority date	—
Expiry date	Aug 10, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/01
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for producing a plurality of LED illumination devices which each emit light having an average value of a first photometric parameter including producing a plurality of LED chips which emit light of the same color; measuring values of the first photometric parameter of the LED chips; combining the LED chips to form groups of at least two LED chips which have different values of the first photometric parameter such that differences in the average values of all the LED illumination devices are imperceptible to the human eye; and equipping a respective LED illumination device with a group of LED chips.

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