Liquid crystal display device in which no sticking phenomenon occurs with high contrast
US5682217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1995 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Feb 17, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13743
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a liquid crystal display device in which a twisted nematic liquid crystal layer of positive dielectric anisotropy is sandwiched between two substrates fitted with electrodes and liquid crystal molecule orientation films, and in which the angle of intersection of the liquid crystal molecular alignment directions on the surfaces of the two substrates is .theta. (0.degree.<.theta.<90.degree.) and the cell twist angle is .phi. which is determined to give a uniform twist alignment to the liquid crystal layer by the tilt orientation on the two substrates, the liquid crystal molecule orientation films have a twist angle .omega. which is +.theta.+180.degree. or +.theta.-180.degree. when .phi. is +.theta., and which is -.theta.+180.degree. or -.theta.-180.degree. when .phi. is -.theta., in the state when a voltage applied to the liquid crystal layer is less than a threshold voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.