Active-matrix-type liquid crystal display device, data signal line driving circuit, and liquid crystal display device driving method
US6677925B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2000 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Jul 7, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3655
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an active-matrix LCD device, a coupling signal in accordance with a sum of outputs of data signal lines is detected by a detection-use bus line crossing each of the data signal lines. The coupling signal is superimposed via a coupling capacitor on an input signal that serves as a reference, and is inverted and amplified by a inverting-amplifying section, then it is outputted as a common electrode signal. With this, a waveform that corresponds to a sum of the outputs is coupled with the common electrode signal. As a result, the common electrode signal is caused to have an influence that corresponds to a fluctuation of a potential of the common electrode due to outputs of the data signal lines and that is reverse in phase, thereby enabling to prevent horizontal shadow due to the outputs of the data signal lines. Thus, it is possible to realize an active-matrix-type LCD device in which horizontal shadow can be prevented with low power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.