Invention Application
- Patent Title: Capacitance type sensor and method for manufacturing same
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Application No.: US10959756Application Date: 2004-10-06
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Publication No.: US20050057266A1Publication Date: 2005-03-17
- Inventor: Hideo Morimoto
- Applicant: Hideo Morimoto
- Priority: JP2002-155251 20020529; JP2002-301709 20021016; JP2003-127980 20030506
- Main IPC: G01L1/14
- IPC: G01L1/14 ; G01L5/16 ; G01L5/22 ; G01L9/00 ; G06F1/32 ; G06F3/033 ; G06F3/044 ; H01H25/04 ; G01R27/26

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.
Public/Granted literature
- US07398587B2 Method for manufacturing a capacitance type sensor with a movable electrode Public/Granted day:2008-07-15
Information query