Projection type image display device
US7589904B2 · kind B2 · utility
2Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2007 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | May 29, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3141
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Both ends of a transparent cover which is formed of a curved member are fitted to a lens guard and a mirror guard, and a free-shaped surface mirror and a free-shaped surface lens are housed in a sealed space defined within a projection type image display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.