Patent · US Expired

Light source element with lateral, angular light injection

US7688400B1 · kind B1 · utility

7Cited by

16References

33Claims

0Family size

Assignee

OSRAM GmbH · DE

Inventors

Franz Schellhorn · Regensburg, DE
Günter Kirchberger · Sinzing, DE
Gunter Waitl · Regensburg, DE
Herbert Brunner · Sinzing, DE
Bernhard Bachl · Regensburg, DE

Key dates

Filing date	Dec 29, 1999
Grant date	Mar 30, 2010
Priority date	—
Expiry date	Dec 29, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/133615
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A light source element is employed back-lighting of liquid crystal displays and that comprises an obliquely placed light exit face and/or light entry face. At its surfaces, the light waveguide is surrounded by reflectors into which suitable aperture regions are potentially formed. A plurality of light sources and/or a more direct view is provided and, thus, a corresponding increase of the luminance results. A method is also provided for the manufacture of a light source element with an integrated reflector.

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