Picture display device including a waveform generator/and a comp

Details Picture display device including a waveform generator/and a comp Picture display device including a waveform generator/and a comp

1989-01-24

1991-04-16

Oberley, Alvin E.

Communications: electrical

Visual indication

Movable

340813, 358158, 358159, G09G 300

Patent

active

050086596

ABSTRACT:
A picture display device including a generator circuit for generating a periodical waveform for addressing picture elements on a picture display screen, this generator circuit including a time-determining network with a capacitor. To reduce the influence of tolerances, the picture display device is provided with a compensation circuit including a second generator for generating a second periodical waveform and a source for applying a compensation current to the first-mentioned capacitor in dependence upon the second waveform, the second waveform generator including a time-determining network with a second capacitor and both capacitors being integrated in one semiconductor body.

REFERENCES:
patent: 4672449 (1987-06-01), Kraus et al.
patent: 4713690 (1987-12-01), Watanabe et al.
patent: 4733197 (1988-03-01), Chow
patent: 4748505 (1988-05-01), Smeulers et al.
patent: 4791488 (1988-12-01), Fukazawa et al.
patent: 4871951 (1989-10-01), Teuling
patent: 4872055 (1989-10-01), Teuling et al.

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