Pleochroic color display device
US4396251A · kind A · utility
23Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1980 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Feb 28, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133514
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A pleochroic color display device is provided which comprises a layer of guest-host type liquid crystal sandwiched between two transparent electrodes for driving the liquid crystal, the guest-host liquid crystal containing a dichroic dye as guest material, and a color filter disposed in front or rear of the layer of the guest-host type liquid crystal. High contrast pleochroic color displays can be obtained by selecting a blackish dye as the dichroic dye. Dichroic displays other than white ones can be produced by the use of a single liquid crystal cell and a single color filter (with one color).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.