Position indicator, variable capacitor and input device
First Claim
1. A position indicator comprising:
- a substantially elongated case;
a rod partially housed in the case and having a first end protruding outside the case and a second end extending inside the case; and
a variable capacitor housed inside the case and configured to change its capacitance when an external force is applied through the rod to the variable capacitor,wherein the variable capacitor includes;
at least one dielectric having a first surface and a second surface opposite the first surface;
an electrode provided in a defined shape to cover a first defined area on the first surface of the dielectric;
a conductive member attached to the second end of the rod such that it faces the second surface of the dielectric; and
a conductive portion having a defined width and a defined length to cover a second defined area on the second surface of the dielectric, the second defined area being less than half the first defined area and the conductive portion being electrically connectable to the conductive member,wherein the conductive member is configured to be elastically deformed when pressed against the second surface of the dielectric by the external force applied through the rod, such that the capacitance of the variable capacitor changes according to a change of the external force, andwherein no area of the electrode provided on the first surface of the dielectric overlaps with the conductive portion provided on the second surface of the dielectric in a direction in which they oppose each other.
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Accused Products
Abstract
A variable capacitor of a position indicator includes a dielectric, an electrode, a conductive member and a conductive portion. The dielectric has an upper surface and a lower surface opposite the upper surface. The electrode is provided on the upper surface of the dielectric. The conductive member is arranged so as to face the lower surface of the dielectric. The conductive portion is provided on the lower surface of the dielectric and is arranged so as to be electrically connectable to the conductive member. The conductive member is adapted to be elastically deformed when pressed against the lower surface by an external force, such that the capacitance of the variable capacitor changes according to a change of the external force.
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Citations
13 Claims
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1. A position indicator comprising:
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a substantially elongated case; a rod partially housed in the case and having a first end protruding outside the case and a second end extending inside the case; and a variable capacitor housed inside the case and configured to change its capacitance when an external force is applied through the rod to the variable capacitor, wherein the variable capacitor includes; at least one dielectric having a first surface and a second surface opposite the first surface; an electrode provided in a defined shape to cover a first defined area on the first surface of the dielectric; a conductive member attached to the second end of the rod such that it faces the second surface of the dielectric; and a conductive portion having a defined width and a defined length to cover a second defined area on the second surface of the dielectric, the second defined area being less than half the first defined area and the conductive portion being electrically connectable to the conductive member, wherein the conductive member is configured to be elastically deformed when pressed against the second surface of the dielectric by the external force applied through the rod, such that the capacitance of the variable capacitor changes according to a change of the external force, and wherein no area of the electrode provided on the first surface of the dielectric overlaps with the conductive portion provided on the second surface of the dielectric in a direction in which they oppose each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An input device comprising:
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a position indicator having a case;
a rod housed in the case, a first end of the rod protruding outside the case and a second end extending inside the case; and
a variable capacitor housed inside the case and configured to change its capacitance when an external force is applied through the rod to the variable capacitor; anda position detecting device configured to detect a position of the position indicator indicated by the first end of the rod and having an input surface on which the first end of the rod indicates said position, wherein the variable capacitor includes; at least one dielectric having a first surface and a second surface opposite the first surface; an electrode provided in a defined shape to cover a first defined area on the first surface of the dielectric; a conductive member attached to the second end of the rod such that it faces the second surface of the dielectric; and a conductive portion having a defined width and a defined length to cover a second defined area on the second surface of the dielectric, the second defined area being less than half the first defined area and the conductive portion being electrically connectable to the conductive member, wherein the conductive member is configured to be elastically deformed when pressed against the second surface of the dielectric by the external force applied through the rod, such that the capacitance of the variable capacitor changes according to a change of the external force, and wherein no area of the electrode provided on the first surface of the dielectric overlaps with the conductive portion provided on the second surface of the dielectric in a direction in which they oppose each other. - View Dependent Claims (13)
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Specification