Method and apparatus for producing perception of high quality grayscale shading on digitally commanded displays
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United States of America Patent
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Feb 9, 1993
Grant Date -
N/A
app pub date -
Apr 10, 1989
filing date -
Apr 10, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The perception of grayscale shading on a digitally commanded display is produced by commanding pixels of the display with brightness-setting signals of differing average duty cycles. Brightness-setting signals having one brightness level associated with them are phase shifted in relation to time and distributed to spaced apart pixel locations at which the one brightness level is to be produced. The energization of spatially adjacent pixels is scattered in time and pixels which are energized at the same time are selected to be spatially scattered so as to avoid the perception of visual disturbances such as flickering and surface streaming.
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