Capacitive button
AssigneeMitsubishi Electric Corporation
InventorsTakuya Inoue, Takeshi Yamazaki, Tae Orita, Takeshi Ono
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Abstract
A capacitive button capable of improving tolerance to electrostatic discharge is provided. The capacitive button includes: a pair of sensor electrodes which are provided side by side; a floating electrode which is arranged on a front side of the pair of sensor electrodes via an insulating layer; and a ground electrode which is arranged so as to surround the floating electrode, and is grounded without being electrically connected with the pair of sensor electrodes and the floating electrode. By providing the configuration, the tolerance to the electrostatic discharge of the capacitive button can be improved.
Claims10
A capacitive button comprising:
- a pair of sensor electrodes which are provided side by side;
- a floating electrode which is arranged on a front side of the pair of sensor electrodes via an insulating layer;
- and
- a ground electrode which is arranged so as to surround the floating electrode and is grounded without being electrically connected with the pair of sensor electrodes and the floating electrode,
- wherein capacitances of the pair of sensor electrodes are detected by a mutual capacitance system each as an excitation electrode and a detection electrode, and
- the capacitive button further comprising:
- a holding body which holds the pair of sensor electrodes and the floating electrode from a back side;
- and
- a tactile switch which is provided on the back side of the holding body, and is pressed when the holding body is moved from the front side to the back side.
A capacitive button comprising:
- a pair of sensor electrodes which are provided side by side;
- a floating electrode which is arranged on a front side of the pair of sensor electrodes via an insulating layer;
- and
- a ground electrode which is arranged so as to surround the floating electrode and is grounded without being electrically connected with the pair of sensor electrodes and the floating electrode,
- wherein capacitances of the pair of sensor electrodes are detected by a mutual capacitance system each as an excitation electrode and a detection electrode, and
- the capacitive button further comprising an antenna electrode which is provided side by side with the pair of sensor electrodes in a state of forming a gap with the floating electrode more on a back side than the floating electrode, and is grounded.
Dependencies are inferred from the claim text.