Liquid crystal display device having capacitance compensation

Details Liquid crystal display device having capacitance compensation Liquid crystal display device having capacitance compensation

1979-11-05

1981-11-03

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340784, 350331T, G06F 314

Patent

active

042988667

ABSTRACT:
A display apparatus having a liquid crystal display is provided with a measuring element for controlling the drive voltages depending on the temperature of the liquid crystal. The effect of manufacturing tolerances and ageing phenomena are compensated for by means of an auxiliary measuring element. The electric voltages across the measuring element and the auxiliary measuring element differ from one another, for the adjustment of mutually different operating points on the capacitance-voltage curve.

REFERENCES:
patent: 3410999 (1968-11-01), Fergason et al.
patent: 3705310 (1972-12-01), Wild
patent: 3907405 (1975-09-01), Fukai et al.
patent: 4045791 (1977-08-01), Fukai et al.
patent: 4128311 (1978-12-01), Smith et al.

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