Liquid crystal display driver
US4981339A · kind A · utility
6Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Sep 5, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display driver has a 1/4-duty binary-voltage driving system. This driving system generates at least four separate common signals and at least eleven separate segment signals. Although the duty cycle is 1/4. V.sub.on /V.sub.off ratio of the effective value is greater than 1.7. This is accomplished by using four common electrodes and seven segment electrode per each individual pattern generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.