Position indicator
First Claim
1. A position indicator comprising:
- a housing having a first end part and a second end part;
a capacitor having a capacitance that changes in correspondence to a force applied to the first end part of the housing, the capacitor being configured by a semiconductor element that includes a first electrode and a second electrode disposed opposite to the first electrode at a predetermined distance from the first electrode to have a capacitance formed between the first electrode and the second electrode, the first electrode defining a first surface perpendicular to an axis of the capacitor that extends along the predetermined distance between the first and second electrodes, wherein the capacitance changes in correspondence to a change in a relationship between the first and second electrodes caused by the force applied to the first end part of the housing and transmitted to the first electrode;
a pressure transmitting member that has predetermined elasticity and transmits the force to the first electrode of the semiconductor element, the pressure transmitting member being shaped to abut on only a portion of the first surface of the first electrode that is less than an entire area of the first surface; and
a pressing member defining an axial direction and configured to transmit the force applied to the first end part of the housing to the pressure transmitting member along the axial direction;
wherein, the pressure transmitting member shaped to abut on only a portion of the first surface receives the force applied to the first end part of the housing along the axial direction of the pressing member and transmits said force to the first surface of the first electrode of the semiconductor element along the axis of the capacitor.
1 Assignment
0 Petitions
Accused Products
Abstract
A position indicator includes a capacitor having a capacitance that changes in correspondence to a force applied to one end part of a housing. The capacitor is configured by a pressure detecting chip that includes a first electrode and a second electrode disposed opposite to the first electrode with a predetermined distance defined therebetween to have capacitance Cv formed between the first electrode and the second electrode. The capacitance Cv changes when the force applied to the one end part of the housing is transmitted to the first electrode to thereby change a relationship (e.g., the distance) between the two electrodes. A pressure transmitting member having predetermined elasticity is disposed on the first electrode such that the force applied to the one end part of the housing is transmitted to the first electrode of the semiconductor element via the pressure transmitting member.
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Citations
38 Claims
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1. A position indicator comprising:
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a housing having a first end part and a second end part; a capacitor having a capacitance that changes in correspondence to a force applied to the first end part of the housing, the capacitor being configured by a semiconductor element that includes a first electrode and a second electrode disposed opposite to the first electrode at a predetermined distance from the first electrode to have a capacitance formed between the first electrode and the second electrode, the first electrode defining a first surface perpendicular to an axis of the capacitor that extends along the predetermined distance between the first and second electrodes, wherein the capacitance changes in correspondence to a change in a relationship between the first and second electrodes caused by the force applied to the first end part of the housing and transmitted to the first electrode; a pressure transmitting member that has predetermined elasticity and transmits the force to the first electrode of the semiconductor element, the pressure transmitting member being shaped to abut on only a portion of the first surface of the first electrode that is less than an entire area of the first surface; and a pressing member defining an axial direction and configured to transmit the force applied to the first end part of the housing to the pressure transmitting member along the axial direction; wherein, the pressure transmitting member shaped to abut on only a portion of the first surface receives the force applied to the first end part of the housing along the axial direction of the pressing member and transmits said force to the first surface of the first electrode of the semiconductor element along the axis of the capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 37, 38)
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24. A position indicator comprising:
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a housing having a first end part and a second end part; a capacitor having a capacitance that changes in correspondence to a force applied to the first end part of the housing, the capacitor being configured by a semiconductor element that includes a first electrode and a second electrode disposed opposite to the first electrode at a predetermined distance from the first electrode to have a capacitance formed between the first electrode and the second electrode, wherein the capacitance changes in correspondence to a change in a relationship between the first and second electrodes caused by the force applied to the first end part of the housing and transmitted to the first electrode; a pressure transmitting member that has predetermined elasticity and transmits the force to the first electrode of the semiconductor element; a pressing member that transmits the force applied to the first end part of the housing to the pressure transmitting member having the predetermined elasticity; a resonant circuit including an inductance element; and a control circuit that generates a control signal based on a capacitance change in the semiconductor element caused in correspondence to the force applied to the first end part of the housing, and that controls the resonant circuit; wherein the force applied to the first end part of the housing is transmitted to the pressure transmitting member having the predetermined elasticity by the pressing member and is applied to the first electrode of the semiconductor element via the pressure transmitting member. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A position indicator comprising:
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a housing having a first end part and a second end part; a capacitor having a capacitance that changes in correspondence to a force applied to the first end part of the housing, the capacitor being configured by a semiconductor element that includes a first electrode and a second electrode disposed opposite to the first electrode at a predetermined distance from the first electrode to have a capacitance formed between the first electrode and the second electrode, wherein the capacitance changes in correspondence to a change in a relationship between the first and second electrodes caused by the force applied to the first end part of the housing and transmitted to the first electrode; a pressure transmitting member that has predetermined elasticity and transmits the force to the first electrode of the semiconductor element; a pressing member that transmits the force applied to the first end part of the housing to the pressure transmitting member having the predetermined elasticity; a control circuit that generates a control signal based on a capacitance change in the semiconductor element caused in correspondence to the force applied to the first end part of the housing; and a package that houses both the control circuit and the semiconductor element; wherein the force applied to the first end part of the housing is transmitted to the pressure transmitting member having the predetermined elasticity by the pressing member and is applied to the first electrode of the semiconductor element via the pressure transmitting member. - View Dependent Claims (35, 36)
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Specification