Liquid crystal display device
US4702560A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1985 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Oct 9, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3614
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display device comprising a liquid crystal module including liquid crystal display panel having a plurality of liquid crystal picture elements arranged in a matrix form, and driving circuits for applying driving signals to signal electrodes and to scanning electrodes of the liquid crystal display panel, respectively; a control circuit for controlling the operation of the liquid crystal module; a first circuit for dividing frequency of a timing signal given by the control circuit and producing a first signal of lower frequency; and a second circuit for inverting the first signal of lower frequency once per frame period and generating a second signal to reverse the polarity of voltages applied to liquid crystal display elements with its period .tau..sub.M" satisfying the inequality EQU 2.0.ltoreq..tau..sub.F (the frame period)/.tau..sub.M" .ltoreq.6.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.