Patent · US Active

Light source unit and projector having such a light source unit

US9004701B2 · kind B2 · utility

10Cited by

1References

19Claims

0Family size

Assignee

OSRAM GmbH · DE

Inventors

Dirk Berben · Herdecke, DE
Mathias Bruemmer · Wusterwitz, DE
Ulrich Hartwig · Berlin, DE
Nico Morgenbrod · Berlin, DE
Matthias Morkel · Berlin, DE

Key dates

Filing date	Nov 24, 2010
Grant date	Apr 14, 2015
Priority date	—
Expiry date	Sep 2, 2031

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B2018/2253
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A light source unit may include a cooling device; a luminescent substance; an excitation radiation source having a laser source; and an optical element arranged between the radiation source and the substance; wherein the cooling device constitutes a heat sink, wherein the substance is linked thermally to the heat sink; and wherein the optical element is designed as an integrating optical element and is coupled between the radiation source and the substance in such a manner that a part of the radiation emitted by the radiation source, entering in an acceptance angle range of the integrating optical element, is subjected to an internal reflection in the optical element before it exits the optical element and strikes the substance, and that a part of the radiation emitted by the substance enters the optical element and exits the optical element as effective radiation.

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