Gray scale expression method and gray scale display device
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United States of America Patent
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Nov 27, 2001
Grant Date -
N/A
app pub date -
Sep 24, 1997
filing date -
Sep 25, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In order to restrict a degradation of image quality due to fake contours of moving images, gray scale is displayed by dividing one field period into sub-fields and combining the sub-fields including a plurality of sub-fields weighted such that a light intensity of a certain one of the plurality of the sub-fields is smaller than two times a light intensity of a lower sub-field adjacent to the certain sub-field and larger than the light intensity of the lower sub-field. Further, a light intensity information code converter circuit responsive to binary numbers expressing weights of light intensities of the plurality of the sub-fields for outputting a light intensity information expressing weights in a range satisfying a condition that a light intensity of a certain one of the plurality of the sub-fields is smaller than two times a light intensity of a lower sub-field adjacent to the certain sub-field and larger than the light intensity of the lower sub-field.
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