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Detection of a conductive object during an initialization process of a touch-sensing device
专利权人:
MONTEREY RESEARCH, LLC
发明人:
Young Kristopher L
申请号:
US201414520536
公开号:
US9495038(B2)
申请日:
2014.10.22
申请国别(地区):
美国
年份:
2016
代理人:
Kunzler Law Group, PC
摘要:
A method and system for detecting a presence of a conductive object proximate to a capacitive sense element during an initialization process of a touch-sensing device. A capacitance sensing circuit measures a reference capacitance of a reference sense element. A sensing parameter of the capacitance sensing circuit is iteratively adjusted to obtain a target measurement output value for the reference sense element. With the sensing parameter set to the sensing parameter value, the capacitance measurement circuit measures a first capacitance of a first sense element. A first capacitance difference value is determined between the first capacitance and a first baseline capacitance value for the first sense element. A presence of a conductive object is detected proximate to the first sense element when the first capacitance difference value exceeds a threshold value.
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中国工程科技知识中心
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http://www.ckcest.cn/home/

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