Two-layer liquid crystal display panel
US4436379A · kind A · utility
31Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1980 |
| Grant date | Mar 13, 1984 |
| Priority date | — |
| Expiry date | Nov 13, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/15
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A twisted nematic liquid crystal display cell has two layers each containing a liquid crystal material. It is selected that the respective values of .DELTA.n.d, where .DELTA.n is the double refractive index of a liquid crystal layer and d is the thickness of a liquid crystal layer, deviate from each other, in connection with the two liquid crystal layers by about 5% to about 30%, more preferably, about 10% to about 20%. This leads to the advantage that coloration of transmission light owing to interference by double refraction is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.