Detector for detecting pseudo-contour noise and display apparatus using the detector
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United States of America Patent
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Jul 2, 2002
Grant Date -
N/A
app pub date -
Aug 5, 1999
filing date -
Dec 10, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a detector to detect pseudo-contour noise that appears when gradation display is performed in the subfield method on the display apparatus such as a plasma display panel. The invention also provides a display apparatus which makes use of the detector. The detector detects the probability of pseudo-contour noise appearance as a noise quantity (MPD value), which comprises an MPD calculator to calculate the MPD value, an exclusion area detector to detect an area in which diffusion processing is not performed; and a subtractor to remove an exclusion area from an area for which the MPD value has been determined. The display apparatus comprises the detector and a noise diffussing device to reduce appearance of pseudo-contour noise based on the MPD value.
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