Liquid crystal display device with scanning electrode selection means
US5376944A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1991 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | May 17, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0205
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a liquid crystal display device, to improve the contrast, the frame frequency is raised by scanning the scanning electrodes of the liquid crystal display panel a plurality of times during one field interval of the video signal. The scanning electrodes are divided into two groups, which are scanned alternately. An image memory is provided to store video signals. In scanning the liquid crystal display panel, the video signal from the video signal supplying source and the video signal read from the image memory are alternately supplied to the liquid crystal display panel. The image memory stores only part of the video signal such as the video signal for every other horizontal scanning period or the signal consisting of the most significant bit only, not the entire video signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.