Projection type display apparatus
US5798805A · kind A · utility
85Cited by
15References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1995 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Dec 20, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3152
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection type display apparatus has a light source optical system, a first filter (1), a first aperture (17), a condenser lens (13), a liquid crystal element (15) having a color filter for each pixel, a second aperture (18), a second filter (2), a projection optical system which form a schlieren optical system wherein first and second filters each composed of a spectral element for controlling each color of R, G and B are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.