Light guiding apparatus for an illumination system
US7014342B2 · kind B2 · utility
1Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2003 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | May 10, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/7458
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The light-guiding apparatus has a light tunnel and an ellipsoidal reflector. Light emitted from the light tunnel is reflected and focused on a DMD chip by the ellipsoidal reflector. The light tunnel and a long axis of the ellipsoidal reflector form an angle. The angle and an eccentricity of the ellipsoidal reflector are used to modify the light emitted from the light tunnel. Thus, the light is made to match an incident angle and an effective dimension of a digital micro-mirror device receiving the light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.