CCD imager video output defect compensation
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United States of America Patent
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-
Mar 29, 1988
Issued Date -
N/A
app pub date -
Dec 3, 1984
filing date -
Aug 14, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Erroneous data in the video pulse output string of a CCD imager, caused by defective cells in the imager, is detected by comparison with adjacent data in the string and corrected by replacement with adjacent data. CCD video output is delayed by one clock cycle, then compared to the real time video output while both signals are still on the chip. If the delayed pulse is the same or greater magnitude as the real time pulse, that pulse goes on as part of the video output. If the delayed pulse is less than the real time pulse by a defined amount or more, then the real time pulse is replaced in the output by a copy of the following real time data pulse.
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