Keyboard with reduced keying ambiguity
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United States of America Patent
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Jan 31, 2006
Issued Date -
N/A
app pub date -
Jul 11, 2003
filing date -
Jul 12, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
When an array of proximity sensors is used as a keyboard, it can provide an ambiguous output if a user's finger overlaps several keys or if liquid is spilled on the keyboard. This ambiguity is reduced by an iterative method that repeatedly measures a detected signal strength associated with each key, compares all the measured signal strengths to find a maximum, determines that the key having the maximum signal strength is the unique user-selected key and then suppresses or ignores signals from all other keys as long as the signal from the selected key remains above some nominal threshold value.
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