Selecting electrode drive circuit for a matrix liquid crystal di

Details Selecting electrode drive circuit for a matrix liquid crystal di Selecting electrode drive circuit for a matrix liquid crystal di

1987-08-27

1989-06-27

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307268, 307490, 350333, H03K 301, H03K 5156

Patent

active

048432520

ABSTRACT:
A selecting electrode drive circuit is capable of providing drive pulses of twice as high having an amplitude twice as large as the breakdown voltage of semiconductor devices used in the circuit. The drive pulses thus provided are applied to selecting electrodes of a matrix type display device and the driving circuit includes a pulse generator for generating a train of reference pulses, a power supply connected to the pulse generator for level-shifting the reference pulses by the crest value of the power supply and a switching circuit is powered by the power supply.

REFERENCES:
patent: 4000412 (1976-12-01), Rosenthal et al.
patent: 4123671 (1978-10-01), Aihara et al.
patent: 4145872 (1979-03-01), Portmann

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