Image distortion correcting device and image distortion...

Television – Video display – Cathode-ray tube

Reexamination Certificate

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Details

C348S746000

Reexamination Certificate

active

06989872

ABSTRACT:
A write PLL circuit generates a write clock signal for writing a video signal into a line memory. A readout PLL circuit generates a read clock signal for reading out the video signal stored in the line memory. An inner pincushion distortion correction voltage generation circuit modulates a correction waveform in the horizontal scanning period of time by a correction waveform in the vertical scanning period of time, to generate an inner pincushion distortion correction waveform, and adds a DC correction pulse to the inner pincushion distortion correction waveform and outputs the inner pincushion distortion correction waveform as an inner pincushion distortion correction voltage. A capacitive coupling circuit superimposes the inner pincushion distortion correction voltage on an output voltage of a loop filter of the readout PLL circuit, and feeds the inner pincushion distortion correction voltage to a VCO as a control voltage.

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Partial English Language Translation for JP Appln. No. 7-162702.
English Language Abstract of JP 7-298086.
English Language Abstract of JP 11-122562.
English Language Abstract of JP 2000-138946.
English Language Abstract of JP 10-42163.

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