Patent · US Active

Surface light guide and luminaire

US9182531B2 · kind B2 · utility

2Cited by

6References

9Claims

0Family size

Assignee

OSRAM GmbH · DE

Inventors

Peter Brick · Regensburg, DE
Julius Muschaweck · Gauting, DE

Key dates

Filing date	Mar 21, 2011
Grant date	Nov 10, 2015
Priority date	—
Expiry date	Jul 9, 2032

Classification

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

Abstract

In at least one embodiment of the surface light guide, the surface light guide includes at least one scattering element for scattering light. A decoupling coefficient is caused by the scattering element. The decoupling coefficient is set in a varying fashion along a main light-guiding direction. In a direction perpendicular to the main sides of the surface light guide, the opacity value is no more than 0.10, the transmission coefficient is at least 0.75 and the quotient of the minimum light density and maximum light density seen over a continuous emitting area of at least one of the main sides is at least 0.75.

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