Flat-panel display controller with improved dithering and frame rate control
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United States of America Patent
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Mar 26, 2002
Grant Date -
Jan 17, 2002
app pub date -
Nov 1, 1999
filing date -
Feb 10, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A flat-panel display controller generates signals to cause display of images on TFT and STN type flat-panel displays. The display controller includes dither logic and frame rate control logic. The dither logic performs dynamic and distributed dithering on pixel data to generate smooth 16 gray-shade images on the display. The dynamic and distributed dithering capabilities are programmable. Dynamic dithering is programmable to specify, two-phase, four-phase or eight-phase mixes to generate signals for use by TFT and STN type flat-panel displays. The frame rate control logic is responsive to the dither logic and performs frame rate control on the dithered signals using stored values indicative of average pixel luminescence to generate 256 gray-shades.
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