Optical display system including an achromatized ferroelectric light valve
US6233084A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1999 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Jul 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133637
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical display system includes a source of white uncollimated light, a color separator for separating the white light into spectral components, a reflective ferroelectric light valve for spatially modulating the spectral components, and a polarizing beam splitter for directing vertically polarized light towards a display lens. The system further includes a corrective film disposed in an optical path between the white light source and the light valve. The film, which may be made of a ferroelectric material or other birefringent material, ensures that retardance of the light valve is approximately 180 degrees or some other desired angle over a spectrum of interest. In this manner, the light valve is achromatized by the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.