Patent · US Active

Planar light guide and lighting device

US8936384B2 · kind B2 · utility

0Cited by

2References

12Claims

0Family size

Assignee

OSRAM Opto Semiconductors GmbH · DE

Inventors

Andreas Barth · Schnaittach, DE
Julius Muschaweck · Gauting, DE
Uli Hiller · Bad Abbach, DE
Michael Sailer · Wolfskofen, DE

Key dates

Filing date	Mar 21, 2011
Grant date	Jan 20, 2015
Priority date	—
Expiry date	Nov 9, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/0061
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A planar light guide includes a main body with a back face and a radiation outcoupling face opposite thereto, a main direction of light guidance parallel to the radiation outcoupling face, at least one plurality of identically shaped and identically oriented outcoupling structures formed on at least one of the main faces, and at least one structure main face per outcoupling structure, wherein an angle-dependent emission characteristic is provided asymmetrically in a first plane parallel to the main direction of light guidance and perpendicular to the radiation outcoupling face.

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