Liquid crystal display cell with improved plastic substrates
US4561724A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1983 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Nov 21, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133305
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display cell comprising a pair of facing plastic films, a pair of transparent electrodes, each said electrode being formed on the facing surfaces of the films, a liquid crystal enclosed between the films, and a pair of polarizing films, each being provided on the opposite surface of the plastic film, the plastic film comprising a polyester film having a density of 1.380.about.1.420 g/cm.sup.3 and three-way refractive indexes within the following range: EQU -0.03.ltoreq.(n.sub.1 +n.sub.3)/2-n.sub.2 .ltoreq.+0.05, and EQU 1.480.ltoreq.n.sub.3 >1.525 wherein PA1 n.sub.1 =refractive index in the principal oriented direction; PA1 n.sub.2 =refractive index in the direction intersecting perpendicularly to n.sub.1 and n.sub.3 ; and PA1 n.sub.3 =refractive index in the direction of film thickness. The liquid crystal display cell thus constructed according to the present invention offers excellent flexibility and a nice display with clarity and lightness. Additionally, the present cell is particularly suitable for thin electronic calculators and liquid crystal televisions with a large and/or curved display area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.