Projector
US8619202B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2011 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Apr 11, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133371
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projector includes: a lighting device that emits light of a plurality of different colors; a plurality of liquid crystal light valves that modulate the light of a plurality of colors; a color synthesizing optical system that synthesizes the color light modulated by the plurality of liquid crystal light valves; and a projection optical system that projects the light synthesized by the color synthesizing optical system to a projection target face. A cell thickness of one liquid crystal light valve modulating light of one color of the plurality of liquid crystal light valves is smaller than a cell thickness of the other liquid crystal light valves modulating the light of other colors, and an alignment state of liquid crystal at the time of applying the maximum gradation voltage is substantially the same in one liquid crystal light value and the other liquid crystal light valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.