Electro-optical liquid crystal device with compensator having negative optical anisotropy
US5142393A · kind A · utility
52Cited by
3References
37Claims
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Key dates
| Filing date | Jan 19, 1990 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jan 19, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/15
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optical liquid crystal display device includes at least one of the optically anisotropic layers has three main refractive indices N1o, N2o and N3e. The axis corresponding to N3e is in the direction approximately parallel to the surfaces of the substrates of the liquid crystal cell and N3e is smaller than N1o and N2o. The device may include a homogenous or twisted liquid crystall cell with the cell and anisotropic layer sandwiched between two polarizers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.