Position pointer
First Claim
1. A position pointer for use with a position detection sensor, comprising:
- a transmission signal production circuit configured to produce a position signal;
an elongate pointer body having a distal end and a proximal end;
a central electrode disposed near the distal end of the elongate pointer body, wherein the central electrode includes a tip that extends beyond the distal end of the elongate pointer body;
a peripheral electrode disposed near the distal end of the elongate pointer body and surrounding the central electrode, wherein the peripheral electrode includes a distal limit that is positioned proximally than the tip of the central electrode;
wherein the central electrode and the peripheral electrode are configured to communicably couple with the position detection sensor, which in operation detects the position signal produced by the transmission signal production circuit; and
a tubular conductor provided radially between the central electrode and the peripheral electrode and physically distanced both from the central electrode and from the peripheral electrode, wherein the tubular conductor includes a distal limit that is positioned between the tip of the central electrode and the distal limit of the peripheral electrode along an axial direction of the elongate pointer body to electrically isolate the central electrode from the peripheral electrode.
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Accused Products
Abstract
A position pointer is provided for use with a position detection sensor, capable of achieving power saving. The position pointer includes: a first electrode configured to receive an AC signal from a position detection sensor; a transmission signal production circuit configured to produce a position signal, based on which the position detection sensor detects a position of the position pointer; a second electrode different from the first electrode and configured to transmit the position signal to the position detection sensor; a signal detection circuit configured to detect whether or not the AC signal from the position detection sensor is received through the first electrode; and a transmission controlling circuit configured to control transmission of the position signal through the second electrode to the position detection sensor in response to an output from the signal detection circuit.
19 Citations
20 Claims
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1. A position pointer for use with a position detection sensor, comprising:
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a transmission signal production circuit configured to produce a position signal; an elongate pointer body having a distal end and a proximal end; a central electrode disposed near the distal end of the elongate pointer body, wherein the central electrode includes a tip that extends beyond the distal end of the elongate pointer body; a peripheral electrode disposed near the distal end of the elongate pointer body and surrounding the central electrode, wherein the peripheral electrode includes a distal limit that is positioned proximally than the tip of the central electrode; wherein the central electrode and the peripheral electrode are configured to communicably couple with the position detection sensor, which in operation detects the position signal produced by the transmission signal production circuit; and a tubular conductor provided radially between the central electrode and the peripheral electrode and physically distanced both from the central electrode and from the peripheral electrode, wherein the tubular conductor includes a distal limit that is positioned between the tip of the central electrode and the distal limit of the peripheral electrode along an axial direction of the elongate pointer body to electrically isolate the central electrode from the peripheral electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of manufacturing a position pointer for use with a position detection sensor, comprising:
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providing an elongate pointer body having a distal end and a proximal end; arranging a central electrode near the distal end of the elongate pointer body such that a tip of the central electrode extends beyond the distal end of the elongate pointer body; arranging a peripheral electrode near the distal end of the elongate pointer body such that the peripheral electrode surrounds the central electrode and that a distal limit of the peripheral electrode is positioned proximally than the tip of the central electrode; and positioning a tubular conductor radially between the central electrode and the peripheral electrode and physically distanced both from the central electrode and from the peripheral electrode, such that a distal limit of the tubular conductor is positioned between the tip of the central electrode and the distal limit of the peripheral electrode along an axial direction of the elongate pointer body to electrically isolate the central electrode from the peripheral electrode. - View Dependent Claims (17, 18, 19, 20)
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Specification