Liquid crystal display apparatus using liquid crystal having ferroelectric phase and method of driving liquid crystal display device using liquid crystal having ferroelectric phase
US5963187A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1996 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Mar 26, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3614
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a TFT liquid crystal display device using a DHF liquid crystal, the DHF liquid crystal is alienable to a first alignment state in which liquid crystal molecules are substantially aligned to a first direction, to a second alignment state in which the liquid crystal molecules are substantially aligned to a second direction and to an arbitrary intermediate alignment state between the first and second alignment states, in accordance with a voltage applied between the pixel electrodes and the opposing electrode. One of a pair of polarization plates has an optical axis set in substantially an intermediate direction between the first and second directions. The optical axis of the other polarization plate is set perpendicular to the optical axis of the former polarization plate. A pulse having a voltage whose absolute value corresponds to a display gradation and whose polarity changes frame by frame is applied to the DHF liquid crystal for each pixel in the selection period of that pixel. A single pulse is applied for a single image signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.