System for improving two-color display operations
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United States of America Patent
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Jul 21, 1992
Issued Date -
N/A
app pub date -
Oct 30, 1989
filing date -
Aug 11, 1986
priority date (Note) -
Expired
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Abstract
A system is disclosed which reduces significantly the time for processing multi-bit two-color data for display. The system generates multi-bit two-color data by expanding single-bit monochromatic data, and provides three types of output data: a first expanded multi-bit color data, a second expanded multi-bit color data, and a third unchanged multi-bit data, the unchanged data being combinable with other data for producing data overlays. The system comprises a data expansion circuit for maintaining selected data unchanged and for expanding selected single-bit data to multi-bit two-color data, a memory for storing multi-bit data, and a data compression circuit for compressing selected multi-bit data to single-bit data.
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