Method of control of a liquid-crystal display cell
US4066333A · kind A · utility
11Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1976 |
| Grant date | Jan 3, 1978 |
| Priority date | — |
| Expiry date | May 18, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display cell comprises a liquid-crystal film interposed between two groups of electrodes to which is applied a set of low-frequency voltages in order to produce an optical state "0" at desired points and a set of high-frequency voltages in order to produce an optical state "1" at other predetermined points. In the composite excitation applied to each zone, the low-frequency fraction of excitation exceeds the high-frequency fraction in the "0" display zones and the high-frequency fraction exceeds the low-frequency fraction in the "1" display zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.