Illumination device and application thereof to the illumination of a transmissive screen
US6014192A · kind A · utility
62Cited by
16References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1997 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Jul 16, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13362
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination device comprises a light source coupled to a waveguide. the waveguide comprises a diffracting element capable of diffracting emergent light rays coming from the source, in a direction substantially perpendicular to the surface of the waveguide. A device of this kind is particularly well-suited to transmissive display screens of the liquid crystal display screen type. It can generate a highly collimated, polarized light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.