Patent · US Active

Illumination device

US7942565B2 · kind B2 · utility

29Cited by

11References

37Claims

0Family size

Assignee

OSRAM Opto Semiconductors GmbH · DE

Inventors

Gunnar Klick · Regensburg, DE
Hubert Ott · Bad Abbach, DE
Franz Schellhorn · Regensburg, DE
Mario Wanninger · Regensburg, DE
Georg Bogner · Lappersdorf, DE

Key dates

Filing date	May 19, 2006
Grant date	May 17, 2011
Priority date	—
Expiry date	Feb 28, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/0068
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An illumination device is specified which has a light source (1) suitable for coupling divergent electromagnetic radiation (6) into an optical waveguide (2), the electromagnetic radiation (6) being guided in the optical waveguide (2) on the basis of total reflection the optical waveguide (2) being suitable for changing a main radiating direction (17) of the electromagnetic radiation (6), and the optical waveguide (2) being formed in one piece. Light-emitting diodes are preferably used as the light source (1). The illumination device is particularly well suited to the backlighting of displays.

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