Electro-optical display device
US4017156A · kind A · utility
22Cited by
2References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1975 |
| Grant date | Apr 12, 1977 |
| Priority date | — |
| Expiry date | Feb 24, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/34
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optical display device which has linear polarizer, a 1/4-spectrum plate, a twisted nematic electro-optical cell disposed between the polarizer and the 1/4-spectrum plate, and a power source for applying an electric field to the cell. This device is for control, electrically, of the rotational direction of circular polarization and for electro-optical display of colors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.