Polymer dispersed liquid crystal display with birefringence of the liquid crystal at least 0.23
US5206747A · kind A · utility
44Cited by
21References
50Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13725
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal apparatus (30) comprising a containment medium (56), a birefringent liquid crystal material (38) and a pleochroic dye (54) contained in the liquid crystal material The difference between the ordinary and extraordinary indices of refraction of the liquid crystal material is between about 0.23 and 0.30. The liquid crystal material is dispersed in plural volumes in the containment medium. A pleochroic dye may be present in the liquid crystal material in a concentration of about 0.5% to 3.0%. The apparatus has enhanced backscattering in the field-off state and enhanced light transmission in the field-on state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.