Display device with a black-optimizing bistable nematic screen and method for the definition of said device
US7589816B2 · kind B2 · utility
0Cited by
2References
30Claims
0Family size
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Key dates
| Filing date | Nov 25, 2004 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Oct 14, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1391
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device nematic liquid crystal display device has two stable states corresponding to two liquid crystal molecule textures whose torsion differs by 150° to 180° in terms of absolute value. The device includes two polarizers (10, 40), one (10) of which is placed on the observer side, the other (40) being placed on the opposite side of the liquid crystal cell. The orientation of the two polarizers is offset by a value which is equal to the rotatory power of the cell+/−Π/2, the rotatory power corresponding to the most twisted texture effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.