Method to control a matrix display screen and device for impleme

Details Method to control a matrix display screen and device for impleme Method to control a matrix display screen and device for impleme

1989-02-14

1991-07-16

Brier, Jeffery A.

Communications: electrical

Continuously variable indicating

With meter reading

340811, G09G 334

Patent

active

050328328

ABSTRACT:
Method for controlling a matrix display screen enabling its contrast to be adjusted as regards a liquid crystals screen and its luminosity as regards a fluorescent micropoints screen, said method consisting of periodically applying line conductors addressing signals V1 having for a certain period a value Vmax into an absolute value to be applied to column conductors of control signals. Addressing signals are applied to the line conductors, the durations of said signals having a value Vmax and are partially recovered for two consecutive lines.

REFERENCES:
patent: 4044346 (1977-08-01), Akahane et al.
patent: 4476466 (1984-10-01), Mitani et al.
patent: 4625204 (1986-11-01), Clerc
patent: 4626072 (1986-12-01), Clerc et al.
patent: 4724433 (1988-02-01), Inoue et al.
patent: 4841294 (1989-06-01), Clerc

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