Display devices
US4088400A · kind A · utility
181Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1973 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Dec 21, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/07
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improvement in electro-optical display devices utilizing polarized light is disclosed, in which the linearly polarized light emerging from the display device is picked up by a diffuser and reaches the observer eyes after passing through a linear polarizer. The contrast is thus enhanced and the display can be used in presence of strong ambient lighting. The contrast can be still further improved by arranging at either side of the diffuser two suitably oriented quarter-wave plates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.