Method and device for driving in time division fashion field eff

Details Method and device for driving in time division fashion field eff Method and device for driving in time division fashion field eff

1974-05-20

1976-08-17

Trafton, David L.

Communications: electrical

Systems

With specific power supply

340324R, 350160LC, G08B 536

Patent

active

039757269

ABSTRACT:
In a method and device for driving in time division fashion a field effect mode liquid crystal display device for numeric display, having a plurality of sets of segment electrodes, each set being provided for one digit, and a plurality of separated digit electrodes disposed opposite to the plurality of segment electrode sets respectively, the corresponding segment electrodes of the respective digits being commonly connected, the amplitude of voltages applied to the display points in the half-selected and non-selected states are kept constant while the effective value of the voltage applied to the display points in the selected state is arbitrarily set by changing the duty ratio of selection time so that color in the display may be changed.

REFERENCES:
patent: 3711180 (1973-01-01), Klinger et al.
patent: 3758195 (1973-09-01), Hedman et al.
patent: 3835463 (1974-09-01), Tsukamoto et al.

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