Liquid crystal display apparatus
US4803480A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1986 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | May 12, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3618
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to the present invention, in a liquid crystal display apparatus, there are provided second horizontal switching elements M.sub.Bl to M.sub.Bm, which are driven at the advanced phase relative to picture element switching signals .phi..sub.Hl to .phi..sub.Hm, at columns L.sub.l to L.sub.m to which a video signal is supplied, a signal, which is derived through said second horizontal switching elements M.sub.Bl to M.sub.Bm, is fed back through an inverting circuit (14) and the like to an input terminal (1), and there are provided third switching elements M.sub.Rl to M.sub.Rm which are turned on at every predetermined period. According to this apparatus, since a signal derived from a liquid crystal cell C is returned to the same liquid crystal cell C, the displacement of the picture and the like can be avoided, any special scanning and the like are not required and a prior art driving circuit and so on can be used as they are. Further, since the potential of the signal line is reset at every predetermined period, it is possible to prevent the quality of the picture from being deteriorated by a residual charge and the like and the excellent display of a still picture can be car…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.