Light source
US7738177B2 · kind B2 · utility
1Cited by
8References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2007 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Oct 5, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/315
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light source for use in a projection system comprises a pair of lamps each effective to produce a substantially collimated beam. Part of the light emitted by each lamp is directed through the light originating part of the same, or another, lamp. A light combiner is arranged within the path of the light beams from each of the two lamps to provide a composite light beam of a cross section less than the sum of the cross section of the beams produced by each of the lamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.