Light valve device
US6067062A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1991 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Aug 23, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light valve has a composite substrate comprised of an electrically insulating substrate and a semiconductor single crystal thin film formed over the electrically insulating substrate. A pixel array comprising semiconductor switch elements is formed in the semiconductor single crystal thin film. A peripheral circuit having circuit elements is formed in the semiconductor single crystal thin film so that a small-sized, high speed light valve is obtained. X- driver and Y-driver circuits are formed in the semiconductor single crystal thin film and controlled by a control circuit, such as a video signal processing circuit, which receives and processes video signals inputted directly from an external source. The peripheral circuit can be a DRAM sense amplifier for sensing charges stored in each pixel of the pixel array to detect defects in the pixel array. The peripheral circuit can be a photosensor circuit for detecting an intensity of incident light to monitor the performance of a light source of the light valve. The peripheral circuit can be a temperature sensor for detecting the temperature of a liquid crystal layer of the light valve, and may be comprised of Darlington connected NP…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.