Electro-optical display device using a liquid crystal cell
US4088992A · kind A · utility
10Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1976 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Apr 30, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/144
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optical display device and a method of manufacturing it are disclosed. The display device includes a liquid crystal cell arranged between two polarizers. A light source is positioned adjacent one polarizer on the side thereof remote from the liquid crystal cell, and an electronic control device is coupled to the liquid crystal cell. A diaphragm is arranged on one side of the liquid crystal cell in the form of an aperture for limiting the display field of the liquid crystal. The device limits viewing parallax and improves contrast for both day and night viewing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.