Method of driving a display device and a display device suitable for such method
US4990905A · kind A · utility
12Cited by
12References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1988 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Nov 28, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3607
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The number of grey levels in LCD display devices is drastically increased by not selecting the picture elements during a part of the line period and by providing them with data signals of opposite polarity. The capacitive crosstalk thereby decreases considerably. This provides the possibility of introducing more grey levels by sub-division of the picture elements into a number of sub-sections providing an extra drive with extra column electrodes. Alternatively, omission of the extra drive enables a given redundancy which would otherwise be impossible due to loss of grey levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.