HIGH NOISE IMMUNITY SENSING METHODS AND APPARATUS FOR A CAPACITIVE TOUCH DEVICE
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United States of America Patent
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Aug 7, 2015
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Apr 3, 2012
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Abstract
High noise immunity sensing methods and apparatus are provided for a capacitive touch device, which sense the capacitive touch device for self capacitance or mutual capacitance or both with different scan frequencies in a frame, to thereby suppress certain frequency noise interference. By combining time domain and space domain noise-eliminating approaches, probabilities of noise interference are reduced, without compromising other parameters.
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