LCD projection system
US6827452B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2002 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Dec 31, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A LCD projection system includes a beam splitter that splits a polarized light beam into a light of two primary colors and a light of one primary color, a first polarization element adapted to polarize the light of two primary colors, a second polarization element adapted to polarize the light of one primary color, a dichroic element adapted to separate the two colors of the light of two primary colors, a modulator adapted to modulate the light of tow primary colors and the light of one primary color and to reflect modulated light for output, a retarder provided between the first polarization element and the polarization element, and a projection lens adapted to project modularized light from the modulator and the first polarization element onto a display screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.