Bi-directional scan circuit

Details Bi-directional scan circuit Bi-directional scan circuit

1993-06-18

1994-08-23

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2970, H01J 2976

Patent

active

053410726

ABSTRACT:
At a horizontal deflecting circuit of bi-directional deflection, timings of deflection of forward scan path and backward scan path are respectively controlled. The timing of deflection of forward path or backward path is controlled at the first timing control circuit 22 so that it is synchronized with the horizontal synchronizing signal HD and timing of deflection of backward path or forward path is controlled at the second timing control circuit 24 so that deflection cycles of forward path and backward path are equalized.
Further, timings of deflection of forward scan path and backward scan path are controlled respectively at first and second phase comparison circuits 22 and 24 so that the relation in phase between the image signal and the deflection takes a constant value on the basis of the horizontal synchronizing signal, to previously prevent occurrence of steady phase error.

REFERENCES:
patent: 4035841 (1977-07-01), Micek
patent: 4674449 (1987-06-01), Kraus et al.
patent: 4719394 (1988-01-01), Watanuki
patent: 4956585 (1990-09-01), Rilly
patent: 5051668 (1991-09-01), Kawaberi et al.

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