Light-emitting device with brightness enhancing layer
US7942537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2006 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Mar 31, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133611
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A brightness enhancing means (5), comprising a collimating means (6) having a receiving area (61), an output area (62) being larger than said receiving area (61), and sidewalls (63) at least partially extending between said receiving and output areas, is provided. At least a portion of the sidewalls (63) of said collimating means (6) comprises a first filter being arranged to reflect light of a first light property, which light is received via said receiving area (61) of said first collimating means (6), towards said output area (62) of said first collimating means (6), wherein said first filter is a dichroic filter or a polarization filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.