Projection type image display apparatus
US5056912A · kind A · utility
56Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Jul 17, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/7441
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection type image display apparatus having a source of light, a transmissive display device having a number of picture elements, a light converging means for converging rays of light in correspondence to one or more of the picture elements, a projecting lens disposed backward of the display device so as to project the image represented by the display device on a screen, the projection lens having a larger numerical aperture than that of the converging means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.