ECB type liquid crystal display device having birefringent layer with equal refractive indexes in the thickness and plane directions
US5175638A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1992 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | May 21, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/01
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display device including (1) a liquid crystal cell in which a liquid crystal layer with a liquid crystal composition having a positive dielectric anisotropy is sandwiched between a pair of substrates each having at least one electrode, and the liquid crystal molecules in the liquid crystal layer are homogeneously aligned between the substrates, (2) a pair of polarizers disposed so as to sandwich the liquid crystal cell therebetween and (3) at least one birefringent layer sandwiched between the liquid crystal layer and the polarizer, in which the maximum refractive index direction within the plane of the birefringent layer is substantially perpendicular to the aligning direction of the liquid crystal molecules. The device is excellent particularly in highly multiplexing driving characteristic as a black and white light shutter or a color display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.