Backlights having selected output light flux distributions and display systems using same
US9541698B2 · kind B2 · utility
47Cited by
101References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2009 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | May 31, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0053
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight that includes a front reflector (120) and a back reflector (130) that form a hollow light recycling cavity including an output surface (104) is disclosed. At least a portion of the back reflector is non-parallel to the front reflector. The backlight also includes at least one semi-specular element disposed within the hollow light recycling cavity, and one or more light sources (140) disposed to emit light into the hollow light recycling cavity, where the one or more light sources are configured to emit light into the hollow light recycling cavity over a limited angular range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.