Color graphic imager utilizing a liquid crystal display
US4944578A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1988 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | Jul 21, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S353/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display including a liquid crystal cell. The cell includes a liquid crystal material, a plurality of electrodes, and first and second polarizers. The first polarizer is located at a viewing side of the cell such that the vibration direction of light polarized thereby is non-parallel to the optic axis of the liquid crystal material as its front boundary layer. The second polarizer is located on a side of the cell remote from the first polarizer wherein the vibration direrction of light polarized thereby forms an angle with respect to the vibration direction of light polarized by the first polarizer. The liquid crystal is responsive to different magnitudes of the electric field for the display of perceived color differences. The display is interfaced with a computer via circuitry which converts color display information produced by the computer to drive signals for applying the electric field in the different magnitudes across selected ones of the electrodes in order to display the perceived color differences. The display is part of a panel for use with a projector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.