Bi-directional scan circuit

Details Bi-directional scan circuit Bi-directional scan circuit

1993-05-21

1994-09-20

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315371, 315391, 315396, G09G 104, H01J 2970

Patent

active

053492749

ABSTRACT:
In a dual direction horizontal bi-directional scan circuit, deterioration of the picture quality is prevented, while linearity is improved without supplying wasteful deflecting current, and pin distortion is corrected. The deflecting current in the going scan and in the returning scan are supplied to each deflecting coil by first and second resonance circuits, and capacitors substantially the same in capacitance are provided in the first and second resonance circuits to bias the deflecting voltage so that the terminal voltage and the power source voltage of the capacitors are synchronized to the vertical synchronizing signals to produce a parabolic modulation.

REFERENCES:
patent: 3144580 (1964-08-01), Bridges et al.
patent: 4206388 (1980-06-01), Ishigaki et al.
patent: 4242714 (1980-12-01), Yoshida et al.
patent: 4654940 (1987-01-01), Groeneweg et al.
patent: 4956585 (1990-09-01), Rilly
"Horizontal-Ablenkschaltung mit modulierter S-Korrektur", Neues aus der Technik, Dec. 15, 1989, No. 4, at 1, Col. 1 (Vogel Verlag, Wurzburg, Germany).

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