Method and apparatus for driving liquid crystal display unit
US5430460A · kind A · utility
24Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1994 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Oct 25, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0247
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for driving a liquid crystal display unit is arranged to apply positive-polarity signals to drains of thin film transistors of active matrix liquid crystal elements during an interval of a 1/n field and to apply negative-polarity signals to the drains during an interval of a next 1/n field. This method does not need to invert a common electrode voltage V.sub.com and a signal voltage V.sub.D at each scan period (1H). This contributes to easier design of a voltage-alternating circuit for V.sub.D or V.sub.com and reduces flicker resulting from the inversed voltage on an overall screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.