| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an instruction input device which can detect both the input operation in an XY plane direction and the input operation in the rotation operation direction to a semispheric input operation face with a simple configuration of only four kinds of electrodes. <P>SOLUTION: Four kinds of detection electrodes insulated mutually are formed around a Z-axis centering on a vertex P on the Z-axis with distances of 90 degrees on a surface of an insulator of a shape of spherical crown, and the shape is so formed that the surface areas of the detection electrodes become smaller when approaching to the vertex P on the Z-axis, respectively, and become smaller when separating from forming positions of 90 degrees distances in the circumferential direction. Input operation in the XY plane direction and input operation in the rotating operation direction of the detected body are detected, as a facing area of the detection electrode which faces the detected body differs by the input operation position in the circumferential direction and becomes smaller when approaching to a vertex P and stray capacitance of the detection electrode differs according to the facing area. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
