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US 11,143,526 B2Granted
Capacitive sensor
AssigneeAlps Alpine Co., Ltd.
InventorsSuguru Wada, Tomoki Yamada, Toru Takahashi
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Abstract
A capacitive sensor has first electrodes, a second electrode, and a third electrode, which are disposed at places where a manipulating body that is part of a human body such as a finger is detected. The capacitive sensor also has a capacitance detecting means and a deciding means. The deciding means identifies the number of manipulating bodies and directions (positions) according to the capacitances of the first electrodes, second electrode, and third electrode.
Claims13
A capacitive sensor comprising:
- a plurality of first electrodes that are placed on a common circumference, each of the plurality of first electrodes generating a capacitance according to a respective distance to a manipulating body;
- a capacitance detecting means that detects capacitances generated in the plurality of first electrodes;
- and
- a deciding means for deciding a direction in which the manipulating body is positioned according to a capacitance detected for each of the plurality of first electrodes under a condition that a sum of the capacitances detected for the plurality of first electrodes is equal to or larger than a first threshold.
1 more element
Dependencies are inferred from the claim text.