Patent ID: 8106893
Filing Date: 2012-01-31
Classification: H03K

Abstract:
1. A sensing apparatus comprising: a measurement section that measures capacitance of each of a plurality of first electric capacitors having unknown capacitance; a plurality of contact sections that are electrically connected to the plurality of first electric capacitors and that a human body disposed proximally contacts directly or indirectly through an insulator; a determination section that determines whether the human body has contacted the contact section either directly or indirectly based on a result of comparison between the capacitance of the plurality of first electric capacitors measured by the measurement section and a threshold value for each of the plurality of first electric capacitors; a storage section that cumulatively stores a result of measurement for each of the plurality of first electric capacitors, the result of measurement being the result of measurement by the measurement section; a reference capacitance calculation section that calculates reference capacitance for each of the plurality of first electric capacitors based on the result of measurement stored in the storage section; a difference calculation section that calculates an absolute difference value between the reference capacitance for each of the plurality of first electric capacitors and the result of measurement measured by the measurement section for each of the plurality of first electric capacitors; and an adjustment section that adjusts the threshold value for each of the plurality of first electric capacitors based on a sum of the absolute difference value of the other first electric capacitors in the plurality of first electric capacitors calculated by the difference calculation section.