Process for the control of an optical characteristic of a material by signals of increasing time periods
US4427979A · kind A · utility
44Cited by
4References
6Claims
0Family size
Inventors
Key dates
| Filing date | Oct 20, 1981 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Oct 20, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/127
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Process for the control of an optical characteristic of a material intercalated between two electrodes to which are applied excitation signals, wherein in order to bring about an excitation of the material a series of elementary signals is applied to the electrodes for increasing periods of time, each elementary signal either being equal to a constant or zero, all these elementary signals constituting a decomposition of the desired excitation into a given base. An application is in the field of optoelectronics and more particularly in the control of liquid crystal cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.