Light pipe for a projector system
US6398368B2 · kind B2 · utility
7Cited by
9References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 17, 2001 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | May 17, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S385/901
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light pipe is designed for a projector system. The light pipe gathers the light from a light source and guides the gathered light to an image device in the projector system. The area of the exit pupil of the light pipe is smaller than the area of the entrance pupil, and the shape of the exit pupil is scaled from that of the entrance pupil. This improves the light gathering efficiency of the light pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.