Projector
US6910777B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 2003 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Dec 23, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide a compact projector in which a projection image is formed by using four kinds of color light so as to expand an expressible color gamut of the projection image and to achieve an excellent light utilization efficiency, a projector includes a light source, a color-separation optical system, a light-modulation optical system, and a color-synthesis optical system. The color-separation optical system produces four kinds of color light whose output directions are different from each other. The light-modulation optical system includes a first two-color-modulation electro-optical device to modulate any two of the four kinds of color light separated by the color-separation optical system and a second two-color-modulation electro-optical device to modulate the remaining two kinds of color light. Each two two-color-modulation electro-optical device includes a microlens array on a substrate close to the color-separation optical system and a plurality of sub-pixels corresponding to respective microlenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.