LCD projector illumination system having blue and red dichroic mirrors positioned such that blue mirror receives light before red mirror
US6111618A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1998 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Feb 23, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133526
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color liquid crystal display projector having a light source with a radiating element and a liquid crystal display (LCD). The LCD includes an array of multiple picture elements or pixels that each has separate color component elements. A microlens array is positioned adjacent to the liquid crystal display to direct light from the light source into the picture elements. Illumination imaging components cooperate with the microlens array to image the radiating element toward the separate color component elements of the liquid crystal display. Multiple differently inclined dichroic mirrors split the light into light beams of different color components that are imaged onto the appropriate color component elements of the liquid crystal display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.