OPERATION SWITCH USING ELECTROSTATIC CAPACITANCE SENSOR
First Claim
1. An operation switch comprising:
- an electrostatic capacitance sensor that generates a sensing signal in response to approach or contact of an object; and
a controller that determines whether or not the object is a human body in accordance with the sensing signal,wherein the controller determines that the object is not a human body, when the following conditions (A), (B1) and (C1) are satisfied;
(A) a magnitude of the sensing signal is larger than a first threshold at a first time point;
(B1) a rate of change in the magnitude of the sensing signal in a first period is larger than a first rate; and
(C1) the magnitude of the sensing signal does not fall below a second threshold in a second period subsequent to the first period.
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Accused Products
Abstract
An operation switch includes: an electrostatic capacitance sensor that generates a sensing signal in response to approach or contact of an object; and a controller that determines whether or not the object is a human body in accordance with the sensing signal. The controller determines that the object is not a human body, when (A) a magnitude of the sensing signal is larger than a first threshold at a first time point, (B) a rate of change in the magnitude of the sensing signal in a first period is larger than a first rate, and (C) the magnitude of the sensing signal does not fall below a second threshold in a second period subsequent to the first period.
9 Citations
13 Claims
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1. An operation switch comprising:
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an electrostatic capacitance sensor that generates a sensing signal in response to approach or contact of an object; and a controller that determines whether or not the object is a human body in accordance with the sensing signal, wherein the controller determines that the object is not a human body, when the following conditions (A), (B1) and (C1) are satisfied; (A) a magnitude of the sensing signal is larger than a first threshold at a first time point; (B1) a rate of change in the magnitude of the sensing signal in a first period is larger than a first rate; and (C1) the magnitude of the sensing signal does not fall below a second threshold in a second period subsequent to the first period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification