Bistable twisted nematic LCD without an initial twist angle of 180 degrees and not a multiple of 90 degrees
US6573971B1 · kind B1 · utility
2Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2000 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Feb 3, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133531
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A bistable twisted nematic LCD cell is presented. The cell includes front and rear polarizes, substrates and a liquid crystal layer between the substrates. Rubbing directions are arranged to give an initial twist angle of the liquid crystal, arranged such that the cell does not make a configuration with an initial twist angle of 180° and wherein an initial twist angle is not a multiple of 90°, and a twist angle is in the range of 30-80°, with a retardation in the range of 0.33-0.44 &mgr;m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.