METHOD OF REDUCING COMPUTATION OF PALM REJECTION BY PROJECTING TOUCH DATA
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United States of America Patent
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Issued Date -
Oct 10, 2013
app pub date -
Apr 6, 2012
filing date -
Apr 6, 2012
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Abandoned
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Abstract
A method of reducing computation of palm rejection by projecting touch data is disclosed, targeting the handheld devices. The method targets first at obtaining a difference array, followed by extracting maximum values of rows and columns of the difference array to obtain a row projection list and a column projection list respectively. By repeated implementing of mutual capacitance detection, ghost palm blocks can be wiped out from the multiple palm blocks. Once integrating with a local spatial boundary detection algorithm, the sensed signals of intended input located within a rectangular palm block yet beyond a real palm block are consequently detected. The computational algorithm of the palm rejection of this invention is successfully built into the touch panel controller due to its substantially reduced computation.
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