Liquid crystal display device with driving method to eliminate blur due to frequency dependence
US4701025A · kind A · utility
3Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1985 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Aug 19, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3614
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Between a liquid crystal module and a control circuit for controlling said liquid crystal module, there are provided that a counter circuit for counting down a timing signal given by said control circuit and an exclusive-OR circuit whose inputs are square wave pulses delivered from said counter circuit and square wave pulses given by said control circuit with a period of twice the frame period. The polarity of voltages applied to liquid crystal module is reversed by square wave pulses delivered from the exclusive-OR circuit with frequency higher than the frame frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.