Computer graphics processing and selective visual display system – Plural display systems – Diverse systems
Patent
1998-05-20
2000-05-02
Cuchlinski, Jr., William A.
Computer graphics processing and selective visual display system
Plural display systems
Diverse systems
345 87, 345 89, G09G 500
Patent
active
060578092
ABSTRACT:
The amount of time that a row of pixels in a flat-panel display is illuminated is modulated from frame-to-frame and from row-to-row. Pixels in rows that are on for a longer period of time appear brighter than pixels in rows that are on for shorter periods of time. Such line modulation is combined with frame-rate-cycling (FRC) to dramatically increase the number of gray scales that can be generated for any given number of frames in a FRC cycle, and with phase-offsetting to keep the frame period constant and to reduce flicker. An N-frame FRC cycle that previously generated N+1 gray scales now produces a full 2.sup.N gray scales. The total pixel-on time over the N frame cycle depends not just on how many frames the pixel is on, but on which frames the pixel is on. Since each row in each frame in the FRC cycle is on for a different amount of time, aliasing of the frames is greatly lessened or no longer occurs. A line modulation buffer and speeding up the pixel clock to the panel allow for greater modulation.
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Bassetti Chester F.
Singhal Dave M.
Auvinen Stuart T.
Cuchlinski Jr. William A.
Marc-Coleman Marthe Y.
NeoMagic Corp.
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