Liquid crystal display apparatus
US4106858A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1977 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | Apr 18, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13306
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An analog liquid crystal display apparatus comprising a liquid crystal film band inserted between a first conductive electrode and a second resistive electrode; a first voltage source is connected between said first and second electrodes; a second power supply is connected between the two ends of the resistive electrode; the liquid crystal presents a first optical state on a first part of the band and a second optical state on the remainder of the band. The liquid crystal is of the type having a critical relaxation frequency which is either a load relaxation frequency or a dielectric relaxation frequency, the first power supply supplying a voltage at a first frequency and the second power supply supplying a voltage at a second frequency, said two frequencies being on either side of said critical frequency; one of the voltage is then a display voltage and the other is a voltage which inhibits the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.