Driving power unit for driving liquid crystal display element an

Details Driving power unit for driving liquid crystal display element an Driving power unit for driving liquid crystal display element an

1995-06-29

1998-01-27

Burgess, Glenton B.

Television

Video display

Liquid crystal

345104, 368242, 349110, 349 84, 349 89, G02F 133

Patent

active

057126925

ABSTRACT:
A driving power unit for a liquid crystal display element, which charges an electrostatic charge on the surface of the liquid crystal display element having at least a conductive layer and a liquid crystal-dispersed polymer layer in which a liquid crystal is finely dispersed into a polymer matrix, has a blocking oscillator circuit for boosting a low voltage generated by a low-voltage DC power source, a rectifier diode for rectifying the voltage boosted by the blocking oscillator circuit, a smoothing capacitor for being charged by application of the rectified voltage and smoothing an output voltage, and a resistance interconnected between the smoothing capacitor and an output terminal to control an output current value to 5 mA or less. A liquid crystal light-modulating device has a driving power unit and a liquid crystal light-modulating panel including a pair of electrodes at least one of which is transparent or translucent, and a liquid crystal-dispersed polymer layer sandwiched between the electrodes.

REFERENCES:
patent: 3974636 (1976-08-01), Kamiya
patent: 5111316 (1992-05-01), Noble et al.
patent: 5115330 (1992-05-01), Noble et al.
patent: 5117297 (1992-05-01), Nobile et al.
patent: 5136404 (1992-08-01), Nobile et al.
patent: 5351143 (1994-09-01), Sato et al.

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