Vertical oscillation circuit for display device

Details Vertical oscillation circuit for display device Vertical oscillation circuit for display device

1998-03-20

1999-12-21

Westin, Edward P.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

331 20, 345213, 345 10, H04N 510, H01J 2956

Patent

active

060053577

ABSTRACT:
A vertical oscillation circuit includes a self raster discriminating circuit for selectively outputting a vertical sync signal and a vertical flyback signal; a vertical flyback pulse generator for determining the duty of the vertical flyback signal; a pulse level pull up for receiving the duty-determined pulse, thereby inverting its phase and shifting its level; a V-HOLD stage for receiving a vertical hold signal, and then outputting a pulse in accordance with a horizontal cycle; a vertical linearity stage for outputting a vertical linearity control signal; a vertical size control stage for outputting a vertical size control signal; a vertical oscillation stage for receiving a vertical hold control signal, vertical linearity control signal, and vertical size control signal respectively output from the V-HOLD stage, vertical linearity stage, and vertical size control stage, and generating a ramp pulse while controlled by the phase-inverted and potential level shifted pulse output from the pulse level pull up; and a vertical position control stage for controlling the DC level of the vertical oscillation ramp pulse to thereby change vertical position.

REFERENCES:
patent: 5021719 (1991-06-01), Arai et al.
patent: 5394171 (1995-02-01), Rabii
patent: 5493317 (1996-02-01), Kim
patent: 5654743 (1997-08-01), Hu et al.
patent: 5713040 (1998-01-01), Lee

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