Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

1975-09-05

1977-12-13

Corbin, John K.

Communications: electrical

Land vehicle alarms or indicators

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

340324M, 340336, G02F 118, G08B 536, G09F 932

Patent

active

040626261

ABSTRACT:
A liquid crystal display device in which an electronic switch having a double threshold characteristic is combined with each of a plurality of liquid crystal cells, and an ac signal voltage and an ac bias voltage are applied to one and the other terminals respectively of the combined circuit of the liquid crystal cells and electronic switches. In the device, the electronic switches are turned on or off depending on the relation between the phase of the signal voltage and that of the bias voltage so that the liquid crystal cells can be excited for display by the voltage applied thereacross in response to the turn-on of the electronic switches.

REFERENCES:
patent: 3781865 (1973-12-01), Yamazaki
patent: 3902169 (1975-08-01), Washizuka
patent: 3922667 (1975-11-01), Ueda et al.

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