Liquid crystal light valve showing an improved display contrast
US4884875A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1988 |
| Grant date | Dec 5, 1989 |
| Priority date | — |
| Expiry date | Oct 6, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1362
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light-addressed liquid crystal light valve comprises a transparent insulating substrate having either one-dimensional or two-dimensional arrays of light switching elements thereon which can perform switching with an incident light, another opposing transparent substrate having transparent electrodes and a liquid crystal sandwiched therebetween. Each of the light switching elements comprises a voltage divider circuit and an inverter circuit. The voltage divider circuit comprises a photoconductor element and a resistor element. The inverter circuit receives as input the voltage divided by the voltage divider circuit, while the output voltage from the inverter circuit is applied to one pixel electrode for the liquid crystal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.