Liquid crystal display with optical negative uni-axial compensation layer
US5796456A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Jul 12, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display has a plurality of pairs of top and bottom pixel electrodes, each of which has a plurality of sub-areas to which different voltages are applied, wherein at least any one of the top and bottom pixel electrodes has an optical compensation layer which has an optically negative uni-axial structure. The liquid crystal display may have a liquid crystal layer which has co-existing different domains differing in the twisted direction and the tilting up direction of the liquid crystal and at least an optical compensation layer having a bi-axial refractive anisotropy between the liquid crystal layer and the polarization plate, wherein the bi-axial refractive anisotropy of the optical compensation layer has three different refractive indexes n.sub.x, n.sub.y, n.sub.z which satisfy the relationship of n.sub.x >n.sub.y >n.sub.z where n.sub.x is the refractive index in a direction parallel to an X-axis parallel to a surface of the optical compensation layer, n.sub.y is the refractive index in a direction parallel to a Y-axis parallel to a surface of the optical compensation layer and perpendicular to the X-axis, and n.sub.z is the refractive index in a direction parallel…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.