Liquid crystal display mechanism

Details Liquid crystal display mechanism Liquid crystal display mechanism

1978-09-13

1980-12-30

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

340813, 350332, G02F 113

Patent

active

042426790

ABSTRACT:
A liquid crystal display driving circuit arrangement that is formed entirely of elements that can be monolithically integrated in a circuit chip and that adjusts the effective voltage of the drive signals applied to the liquid crystal display cells in response to variations in external conditions is provided. A sensing circuit is adapted to produce a signal representative of a change in an external condition and in response thereto produce a sensing signal representative thereof. A pulse control circuit is adapted to detect the condition signal and in response thereto produce a control signal representative of a variation in effective voltage to be applied to the display cells. A driving circuit is coupled to a liquid crystal display for applying drive signals produced by display control circuit having a variable effective voltage. The driving circuit is adapted to vary the effective voltage of the drive signals applied to the liquid crystal digital display cells by an amount determined by the control signal applied thereto.

REFERENCES:
patent: 3577137 (1971-05-01), Brennan
patent: 3776615 (1973-12-01), Tsukamoto et al.
patent: 3907405 (1975-09-01), Fukai et al.
patent: 4045791 (1977-08-01), Fukai et al.
patent: 4057325 (1977-11-01), Kondo

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