Liquid crystal projection display having laser intensity varied according to beam change-of-axis speed
US4810064A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1988 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Jul 22, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The liquid crystal is written with a laser beam. The laser beam generated by a laser source is applied through an optical control unit such as galvanometer mirrors to the liquid crystal. The intensity of the laser beam applied to the liquid crystal is controlled by a laser beam intensity varying unit. A writing control unit controls the mechanical displacement caused by the optical axis control unit and controls the laser beam intensity varying unit. The laser beam energy applied to the liquid crystal can be maintained constant, thus enabling a constant written line width even during acceleration and deceleration of the optical axis control unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.