Semispecular hollow backlight with gradient extraction
US8807774B2 · kind B2 · utility
4Cited by
29References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2013 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Sep 12, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13362
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A backlight that includes a front reflector and a back reflector that form a hollow light recycling cavity including an output surface is disclosed. The backlight also includes a semi-specular element, and a light extraction element disposed within the hollow cavity. The light extraction element has a gradient specularity. The backlight also includes one or more light sources disposed to inject light into the hollow light recycling cavity, where the one or more light sources are configured to inject light over a limited angular range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.