Projection type liquid crystal displaying device
US4936658A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1987 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Jul 7, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0018
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection type liquid crystal display device includes a light source and condenser lenses for emitting two groups of beams of light which orthogonally cross each other. A first device is disposed in the path of one of the groups of beams and comprises a liquid crystal panel and at least one polarization plate to transmit P-wave polarized light. A second device is disposed in a path of the other group of beams of light and comprises a liquid crystal panel and at least one polarization plate to transmit P-wave polarized light. A dichroic mirror disposed to receive light from the first and second devices synthesizes the P-wave polarized light by transmitting P-wave polarized light from the first device and for reflecting the P-wave polarized light from the second device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.