Picture display apparatus with beam scan velocity modulation

Details Picture display apparatus with beam scan velocity modulation Picture display apparatus with beam scan velocity modulation

1994-09-29

1996-02-06

Groody, James J.

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

348707, H04N 568, H04N 332

Patent

active

054899486

ABSTRACT:
A television set includes a circuit for modulating the horizontal velocity of the beam scan as a function of the video content with the aid of an auxiliary line deflection coil. The beam scan velocity modulation circuit includes a video signal differentiator circuit followed by an amplifier provided at the output of a power stage of the current generator type, which has its output connected to one terminal of the auxiliary line deflection coil. A voltage amplifier is provided at the output of a power stage of the voltage generator type which has its input connected to the output of the differentiator circuit, and its voltage output connected to the other terminal of the auxiliary line deflection coil.

REFERENCES:
patent: 4170785 (1979-10-01), Yoshida
patent: 4185301 (1980-01-01), Mitsuda
patent: 5072300 (1991-12-01), Anderson

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