Projector apparatus having three liquid crystal panels
US5105265A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1989 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Jan 19, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3167
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
All of first to third liquid crystal panels have the same structure. A plurality of dichroic mirrors separate light from a light source into the three primary color (red, green, and blue) beams, and cause the red, green, and blue beams to be respectively incident on the first, second, and the third liquid crystal panels. A dichroic prism superposes the red, green, and blue beams which are respectively transmitted through the liquid crystal panels. A projection lens projects a full-color image beam formed by the dichroic prism. Correcting devices are respectively arranged to oppose the incident surfaces of the first to third liquid crystal panels, and cause the respective color beams separated by the dichroic mirrors to be incident as beams in which the intensities of light components oscillating in the same direction are high.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.