Matrix-addressed liquid crystal display device with compensation for potential shift of pixel electrodes
US4789223A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1986 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Mar 27, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0247
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A matrix-addressed liquid crystal display device is constructed of a pair of substrates facing each other with liquid crystal cells arranged in n rows and m columns on one of the substrates. Switches included in each cell comprise field effect transistors with n address lines forming a common connection for the gate electrodes of the field effect transistors in each row and m signal lines forming a common connection for the drain electrode or source electrode of the field effect transistors in each column. A common electrode is arranged on the other substrate and a liquid crystal layer interposed between the substrates. An address line drive circuit supplies a sequential scanning signal to the n address lines; and, a signal line drive circuit supplies a display signal to the m signal lines. An asymmetrical display signal is selected whereby the voltage applied cross the liquid crystal layer is controlled to be a pure AC signal with no DC component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.