Matrix-addressed liquid crystal display device with compensation

Details Matrix-addressed liquid crystal display device with compensation Matrix-addressed liquid crystal display device with compensation

1986-03-27

1988-12-06

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340784, G02F 113

Patent

active

047892234

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.

REFERENCES:
patent: 3973252 (1976-08-01), Mitomo et al.
patent: 4386352 (1983-05-01), Nonomura et al.
patent: 4571585 (1986-02-01), Stein et al.
patent: 4591886 (1986-05-01), Umeda et al.
patent: 4634226 (1987-01-01), Isogai et al.
patent: 4710768 (1987-12-01), Takeda et al.

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