Display
US7671935B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2006 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Oct 14, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133524
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display comprises: a transmissive pixellated spatial light modulator (21); and a backlight (22). The backlight has a light-transmissive waveguide (26), with a first face of the waveguide being opposed to the spatial light modulator (21). The first face of the waveguide comprises a plurality of regions that are not totally internally reflective for at least one polarisation of light propagating within the waveguide, and the remainder of the first face of the waveguide is totally internally reflective for light propagating within the waveguide. Light is extracted from the waveguide at the regions where first face of the waveguide is not totally internally reflective. The pitch of the regions where first face of the waveguide is not totally internally reflective is substantially an integer multiple of the pitch of the pixels of the spatial light modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.