Thermal method for controlling the optical properties of a liquid crystal and devices for the application of said method
US4031529A · kind A · utility
27Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Dec 22, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a liquid crystal whose molecules have temperature-dependent dielectric anisotropy within a range such that the liquid crystal retains the same phase, the optical properties of a liquid crystal film are controlled by applying an electric field of predetermined frequency to the film and by bringing the temperature of the film to a value within the range mentioned. The dielectric anisotropy then assumes a predetermined value in respect of said frequency and the liquid crystal film assumes a predetermined optical state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.