Capacitive sensor
First Claim
1. A capacitive sensor comprising:
- a first sensing electrode connected to a first reference capacitor in which is stored reference electric charge;
a second sensing electrode connected to a second reference capacitor in which is stored reference electric charge; and
a shield electrode to which is applied electric potential equal to that of the first sensing electrode and the second sensing electrode;
wherein the first sensing electrode positions adjacent to a detecting surface of the capacitive sensor, and the second sensing electrode positions opposite to the detecting surface in such a manner that the first and second sensing electrodes are spaced apart and facing to each other, wherein the shield electrode is configured to partly expose the first and second sensing electrodes on the side of the detecting surface, and wherein the shield electrode extends toward the detecting surface beyond the first sensing electrode.
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Accused Products
Abstract
A capacitive sensor includes: a first sensing electrode connected to a first reference capacitor in which is stored reference electric charge; a second sensing electrode connected to a second reference capacitor in which is stored reference electric charge; and a shield electrode to which is applied electric potential equal to that of the first sensing electrode and the second sensing electrode. The first sensing electrode positions adjacent to a detecting surface of the capacitive sensor, and the second sensing electrode positions opposite to the detecting surface in such a manner that the first and second sensing electrodes are spaced apart and facing to each other. The shield electrode is configured to partly expose the first and second sensing electrodes on the side of the detecting surface, and the shield electrode extends toward the detecting surface beyond the first sensing electrode.
40 Citations
12 Claims
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1. A capacitive sensor comprising:
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a first sensing electrode connected to a first reference capacitor in which is stored reference electric charge;
a second sensing electrode connected to a second reference capacitor in which is stored reference electric charge; and
a shield electrode to which is applied electric potential equal to that of the first sensing electrode and the second sensing electrode;
wherein the first sensing electrode positions adjacent to a detecting surface of the capacitive sensor, and the second sensing electrode positions opposite to the detecting surface in such a manner that the first and second sensing electrodes are spaced apart and facing to each other, wherein the shield electrode is configured to partly expose the first and second sensing electrodes on the side of the detecting surface, and wherein the shield electrode extends toward the detecting surface beyond the first sensing electrode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A capacitive sensor comprising:
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a pair of sensing electrodes which are spaced apart from each other;
a shield electrode which is remote from and surrounds the sensing electrodes;
a coating member which holds the sensing electrodes and the shield electrode and which is made of an insulating material;
wherein the coating member includes a mounting portion for attaching the capacitive sensor to a fixing member, and wherein the mounting portion is provided with a core member, and same electric potential is applied to the core member and the shield electrode. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification