Method of control for an analog display device of the non-continuous liquid crystal strip type
US4191955A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1977 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | Sep 16, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/134309
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid crystal film placed between plate electrodes and point electrodes can have a first optical state 1 if the electrical excitation applied between the plate and point electrodes is higher than a threshold value V.sub.s and a second optical state 0 of this excitation is lower than the threshold value. A set of P voltages is applied to the P point connections of the device and a second set of S voltages is applied simultaneously to the S sector connections. In a boundary sector, some points of the liquid crystal are thus in state 1 while other points are in state 0. In the case of each of the other sectors, the points of any one sector are all in one of the two states 1 or 0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.