Circuit for modulating vertical positions of a picture in a wide

Details Circuit for modulating vertical positions of a picture in a wide Circuit for modulating vertical positions of a picture in a wide

1994-11-03

1996-04-02

Groody, James J.

Television

Video display

Cathode-ray tube

348811, 315403, 315371, 315397, H04N 322, H04N 326

Patent

active

055045391

ABSTRACT:
This invention relates to a circuit for solving a vertical interlace phenomenon generated by the instability of servo control when a mode of VCR operation is fast or still, comprising a vertical pulse delay 101 for delaying a vertical pulse inputted from a vertical and horizontal oscillator 100 for the time of a certain horizontal lines, a vertical driving part which transforms the vertical pulse delayed from the vertical pulse delay 101 into a vertical a tooth wave pulse, and amends the transformed vertical a tooth wave pulse according to the vertical position signal inputted to be made relayed as a feedback, a vertical deflection amplifying part for amplifying the amended a tooth wave pulse inputted from the vertical driving part 102, a vertical position detecting part 105 for detecting a vertical position of a picture from the signal inputted from the vertical deflection amplifying part 103 through a vertical deflection coil 104, a Micom 106 for controlling an operation of the vertical pulse delay 101 and the vertical driving part 102, and a feedback of the signal inputted from the vertical position detecting part 105 and a vertical position control part 107 for controlling a vertical position variableness of a picture by controlling a signal being made a feedback from the vertical position detecting part according to control signal of the Micom.

REFERENCES:
patent: 3705328 (1972-12-01), Torok
patent: 4314184 (1982-02-01), Ryan
patent: 4547708 (1985-10-01), Haferl
patent: 4686430 (1987-08-01), Jennings, Jr.
patent: 5010280 (1991-04-01), Ogino et al.
patent: 5260628 (1993-11-01), Kawaberi et al.

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