Liquid crystal display device comprising a retardation compensation layer having a maximum principal refractive index in the thickness direction
US5124824A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1989 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Dec 5, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1397
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is disclosed a liquid crystal display device including a liquid crystal display cell layer and a pair of polarizers arranged on the sides of respective outer surfaces of the display cell layer. The liquid crystal display device further includes a retardation compensation layer having an optical birefringence which is arranged on at least one side, in a direction of the thickness of the display cell layer and between the polarizers, which compensates a change in the retardation caused when light passes through the display cell layer so as to improve viewing angle characteristics. A direction of a maximum one of principal refractive indices of the retardation compensation layer is oriented in a direction substantially parallel to a direction of the normal perpendicular to the surfaces of transparent substrates of the display cell layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.