Capacitance type sensor and method for manufacturing same

Details Capacitance type sensor and method for manufacturing same Capacitance type sensor and method for manufacturing same

2005-10-25

2005-10-25

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S662000, C073S862043

Reexamination Certificate

active

06958614

ABSTRACT:
In a capacitance type sensor of the present invention, a capacitance element is constituted between a displacement electrode and a capacitance element electrode. A return-switch movable electrode is arranged above and spaced from the displacement electrode, to be placed in contact with the displaying electrode due to a displacement of a direction button. When the direction button is operated, the return-switch movable electrode is first displaced into contact with the displacement electrode. Then, the both make a displacement while keeping a contact state. When the displacement electrode is displaced to change the spacing to the capacitance element electrode, changed is the capacitance value of the capacitance element. Based on this change, a force is recognized. Herein, in the course of a transit from a state the displacement electrode and the return-switch electrode are not in contact to a state of their contact, the output signal varies necessarily beyond a threshold voltage.

REFERENCES:
patent: 6158291 (2000-12-01), Okada
patent: 6159761 (2000-12-01), Okada
patent: 6373265 (2002-04-01), Morimoto et al.
patent: 6530283 (2003-03-01), Okada et al.
patent: WO 02/073148 (2002-09-01), None

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