Liquid crystal element driving apparatus

Details Liquid crystal element driving apparatus Liquid crystal element driving apparatus

1984-11-09

1987-08-18

Miller, Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307311, 350332, 340784, G02F 113, G09G 336, G09G 318, H03K 326

Patent

active

046879560

ABSTRACT:
An apparatus for driving a liquid crystal element by an increased voltage and at a lowered frequency in conformity with temperature fall in the liquid crystal element so as to achieve complete driving of the element even in a low temperature range. In order to increase the driving voltage, the apparatus comprises a booster circuit for increasing a battery voltage, and a voltage divider circuit including an element-temperature sensor as a component thereof and serving to produce a control voltage by dividing the output voltage of the booster circuit. In such configuration, the booster circuit performs its operation in such a manner as to maintain constant the control voltage obtained from the voltage divider circuit.

REFERENCES:
patent: 3862798 (1975-01-01), Hopkins
patent: 4161653 (1979-07-01), Bedini et al.
patent: 4390874 (1984-06-01), Woodside et al.

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