Clamp signal generation-control circuit and a method therefor

Details Clamp signal generation-control circuit and a method therefor Clamp signal generation-control circuit and a method therefor

1994-03-07

1996-03-26

Groody, James J.

Television

Synchronization

348682, 348689, H04N 518

Patent

active

055024980

ABSTRACT:
A clamp signal generation-control circuit includes a clamp signal controller for discriminating the existence of a sync on green signal and a separate sync signal supplied from a video card to a monitor to output a control signal according to the discrimination, and a clamp signal generator for automatically changing a generated point of the clamp signal, and a method for controlling the circuit is also provided. The generated point of the clamp signal supplied to the monitor is controlled to automatically shift the clamping position of a video signal, thereby preventing malfunction caused by a nonprofessional user's manipulation, abnormal picture display or the generation of a segment phenomenon. The circuit is adoptable to monitors supplied with various kinds of sync signals.

REFERENCES:
patent: 4954880 (1990-09-01), Tanimizu

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