Smectic liquid crystal cell with heat pulse and laser
US4477151A · kind A · utility
9Cited by
2References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1981 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Dec 28, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of operating a homeotropically aligned smectic liquid crystal cell in which the cell is turned from a clear to a scattering state by illumination with an intense flash of light after which a focused laser beam is scanned across the layer to leave clear tracks where homeotropic alignment has been restored thereby producing a display providing, in projection, bright lines on a dark background.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.