Light source for projection display
US5971545A · kind A · utility
85Cited by
10References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1997 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Jun 25, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3164
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A compact and energy efficient projection display can be made by starting with relatively pure red, green, and blue light sources. The output beams of the colored light sources are received by at least one spatial light modulator. The modulated output beams are collimated and combined. A projection lens receives the collimated and combined output beams and directs them towards a projection screen. All of the above may be contained in a housing to provide a compact and lightweight projection display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.