Liquid crystal display capable of displaying grey tone
US4861143A · kind A · utility
34Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1987 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Dec 2, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display of the chiral smectic type is caused to have grey scales, by applying a voltage of an intermediate level to the liquid crystal. Within each picture element of the display, there are a number of domains of the liquid crystal layer, some being transparent while the other being opaque rendering grey tone to the picture element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.