Projection type liquid crystal displaying device
US4861142A · kind A · utility
32Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 1987 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | May 12, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3167
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Light emitted from a single light source is split into beams of bidirectional parallel light which are orthogonal to each other. Beams of the parallel light in each direction are reflected by a reflection optical system in such a direction that they become orthogonal to each other. A dichroic mirror is disposed at a point of intersection thereof and liquid crystal panels are provided between each individual reflection optical system and the dichroic mirror resulting in a low cost device which can be structurally miniaturized and which requires less process steps in fabrication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.