POSITION INDICATOR, VARIABLE CAPACITOR, POSITION INPUT DEVICE AND COMPUTER SYSTEM
First Claim
1. A position indicator comprising:
- a variable capacitor;
a resonant circuit configured with a position detecting coil and a capacitor connected with the variable capacitor; and
a rod passing through the position detecting coil,wherein the variable capacitor includes a dielectric having two mutually opposite surfaces, an electrode arranged on one surface of the dielectric and having a predetermined area, a hole penetrating the two mutually opposite surfaces of the dielectric, a conductive portion electrically connecting both ends of the hole to one another, and a conductive elastic member arranged near the other surface of the dielectric, andwherein one end of the rod is connected to the conductive elastic member, and the other end of the rod serves as a position-indicating point.
1 Assignment
0 Petitions
Accused Products
Abstract
A position indicator (100) has a variable capacitor 200, a resonant circuit (36) configured with a position indicating coil (13) and a resonant capacitor (15a), and a rod (11). The variable capacitor (200) has a flat disc-shaped dielectric (1) having two mutually opposite surfaces (1a, 1b), an electrode (2) provided on one surface (1a) of the dielectric (1), a hole (1c) extending between the two mutually opposite surfaces of the dielectric, a conductive portion electrically connecting both ends of the hole, and a conductive elastic member (3) provided near the other surface (1b) of the dielectric (1). The conductive elastic member (3) is arranged on one end of the rod (11). When a pen pressure in the direction of arrow “a” is applied to the other end of the rod (11), the conductive elastic member (3) is pressed against the dielectric (1) so as to be flattened, and the capacitance of the variable capacitor (200) changes in response to the change in the contact area between the conductive elastic member (3) and the dielectric (1).
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Citations
18 Claims
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1. A position indicator comprising:
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a variable capacitor; a resonant circuit configured with a position detecting coil and a capacitor connected with the variable capacitor; and a rod passing through the position detecting coil, wherein the variable capacitor includes a dielectric having two mutually opposite surfaces, an electrode arranged on one surface of the dielectric and having a predetermined area, a hole penetrating the two mutually opposite surfaces of the dielectric, a conductive portion electrically connecting both ends of the hole to one another, and a conductive elastic member arranged near the other surface of the dielectric, and wherein one end of the rod is connected to the conductive elastic member, and the other end of the rod serves as a position-indicating point. - View Dependent Claims (2, 3, 4, 5)
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6. A variable capacitor comprising:
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a dielectric having two mutually opposite surfaces; an electrode arranged on one surface of the dielectric and having a predetermined area; a hole penetrating the two mutually opposite surfaces of the dielectric; a conductive portion electrically connecting both ends of the hole to one another; and a conductive elastic member arranged near the other surface of the dielectric. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A position input device comprising:
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a position indicator; and a position detector, wherein the position indicator includes;
a variable capacitor;
a resonant circuit configured with a position detecting coil and a capacitor connected with the variable capacitor; and
a rod passing through the position detecting coil, where the variable capacitor has a dielectric having two mutually opposite surfaces, an electrode arranged on one surface of the dielectric and having a predetermined area, a hole penetrating the two mutually opposite surfaces of the dielectric, a conductive portion electrically connecting both ends of the hole to one another, and a conductive elastic member arranged near the other surface of the dielectric, and where one end of the rod is connected to the conductive elastic member, and the other end of the rod serves as a position-indicating point, andwherein the position detector detects, near the position-indicating point, a signal transmitted from the position detecting coil. - View Dependent Claims (13, 14, 15)
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16. A computer system including a central processing unit, the system comprising:
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a position indicator; and a position detector, wherein the position indicator includes;
a variable capacitor;
a resonant circuit configured with a position detecting coil and a capacitor connected with the variable capacitor; and
a rod passing through the position detecting coil, where the variable capacitor has a dielectric having two mutually opposite surfaces, an electrode arranged on one surface of the dielectric and having a predetermined area, a hole penetrating the two mutually opposite surfaces of the dielectric, a conductive portion electrically connecting both ends of the hole to one another, and a conductive elastic member arranged near the other surface of the dielectric, and where one end of the rod is connected to the conductive elastic member, and the other end of the rod serves as a position-indicating point,wherein the position detector detects, near the position-indicating point, a signal transmitted from the position detecting coil, and wherein the computer system converts a pen pressure detected by the variable capacitor into a data signal, using the central processing unit. - View Dependent Claims (17, 18)
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Specification