Parallax induced pointing error avoidance method and means for systems using touch screen overlays
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United States of America Statutory Invention Reg
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-
Dec 5, 1989
Grant Date -
N/A
app pub date -
Nov 16, 1987
filing date -
Nov 16, 1987
priority date (Note) -
N/A
status (Latency Note)
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Abstract
In a system using a touch panel type of overlay on a cathode ray tube screen wherein multiple areas for user selection are presented on the tube screen, erroneous touch selection of displayed areas on the tube because of parallax-induced offset is avoided by assigning a guard band around each display area. The width of the band is designed to correlate to the amount of parallax error associated with the combined tube and overlay touch screen environment.
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