EP0152961A2
Expired / Lapsed
EP
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Position detecting apparatus
Assignee: Wacom Co Ltd
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Filing: 1985-02-22
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Granted: —
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Expires: 2005-02-22
Abstract
Abstract Disclosed is a position detecting apparatus which has a position detecting section (10, 20) having elongated magnetic bodies (11 a-11 e, 21a-21e) and a plurality of exciting lines (12a-12i, 22a-22i) and a plurality of detecting lines (13a-13h, 23a-23h) which are arranged altematingly such as to cross the magnetic bodies orthogonally thereto. A driving power source (30) is adapted to apply A.C. voltage of a predetermined frequency to the exciting lines. A position appointing magnetism generator (50) applies a local magnetic bias to the magnetic bodies. The position appointed by the position appointing magnetism generator is detected through the detection of the voltages induced in the detecting lines. According to this arrangement, the position appointing magnetism generator can be handled easily because it is not connected to any stationary part of the apparatus, and the position can be detected at a high precision without being affected by external induction and noises and without producing noise which would affect nearby devices.
Inventors
- 👤 Yoshinori Taguchi
- 👤 Tsuguya Yamanami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 23:21
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/046
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A position detecting apparatus characterized by: a position detecting section (10,20;80) having elongated magnetic bodies (11a-11e, 21a-21e; 81a-81f) and a plurality of exciting lines (12a-12i, 22a-22i; 82a-82j) and a plurality of detecting lines (13a-13h,23a-23h;83a-83g) which are arranged alternatingly such as to cross said magnetic bodies orthogonally thereto; a driving power source (30) adapted to apply A.C. voltage of a predetermined frequency to said exciting lines; a position appointing magnetism generator (50) for applying a local magnetic bias to said magnetic bodies; and a detecting means (60) for detecting the position appointed by said position appointing magnetism generator by detecting the voltages induced in said detecting lines.
Claim 2
Dependent Claim
106 words
A position detecting apparatus characterized by: a position detecting section (10,20;80) having elongated magnetic bodies (11a-11e, 21a-21e; 81a-81f) and a plurality of exciting lines (12a-12i, 22a-22i; 82a-82j) and a plurality of detecting lines (13a-13h,23a-23h;83a-83g) which are arranged alternatingly such as to cross said magnetic bodies orthogonally thereto; a driving power source (30) adapted to apply A.C. voltage of a predetermined frequency to said exciting lines; a position appointing magnetism generator (50) for applying a local magnetic bias to said magnetic bodies; and a detecting means (60) for detecting the position appointed by said position appointing magnetism generator by detecting the voltages induced in said detecting lines.
Claim 3
Dependent Claim
170 words
A position detecting apparatus characterized by: an X-direction position detecting section (10,80) having a plurality of elongated magnetic bodies (11a-11e;81a-81f) arranged substantially in parallel, and a plurality of exciting lines (12a-12i; 82a-82j) and detecting lines (13a-13h;83a-83g) which are arranged alternatingly such as to orthogonally cross said elongated magnetic bodies; a Y-direction position detecting section (20) having a construction similar to that of said X-direction position detecting section and superposed thereto; a driving current source (30) adapted to apply A.C. currents of a predetermined frequency to the exciting lines in said X- and Y-direction position detecting sections; a position appointing magnetism generator (50) adapted for applying local magnetic bias to said magnetic bodies of said X- and Y-direction position detecting sections; X- and Y-direction signal selecting means (41,42) connected to said detecting lines of said X- and Y-direction position detecting sections; and a processing means (60) for computing the coordinate position appointed by said position appointing magnetism generator from the induced voltage derived from said X- and Y-direction signal selecting means.
Claim 4
Dependent Claim
170 words
A position detecting apparatus characterized by: an X-direction position detecting section (10,80) having a plurality of elongated magnetic bodies (11a-11e;81a-81f) arranged substantially in parallel, and a plurality of exciting lines (12a-12i; 82a-82j) and detecting lines (13a-13h;83a-83g) which are arranged alternatingly such as to orthogonally cross said elongated magnetic bodies; a Y-direction position detecting section (20) having a construction similar to that of said X-direction position detecting section and superposed thereto; a driving current source (30) adapted to apply A.C. currents of a predetermined frequency to the exciting lines in said X- and Y-direction position detecting sections; a position appointing magnetism generator (50) adapted for applying local magnetic bias to said magnetic bodies of said X- and Y-direction position detecting sections; X- and Y-direction signal selecting means (41,42) connected to said detecting lines of said X- and Y-direction position detecting sections; and a processing means (60) for computing the coordinate position appointed by said position appointing magnetism generator from the induced voltage derived from said X- and Y-direction signal selecting means.
Claim 5
Dependent Claim
64 words
A position detecting apparatus according to claim 2, characterized in that said exciting lines (82a-82j) of said X- and Y-direction position detecting sections are arranged such that the polarities of the magnetic fluxes formed by said exciting lines or the polarities of the elctric currents formed in said exciting lines are inverted for every other magnetic bodies or every two or more magnetic bodies.
Claim 6
Dependent Claim
66 words
A position detecting apparatus according to claim 2 or 3, characterized in that said detecting lines (83a-83g) of said X- and Y-direction position detecting sections are arranged such that the polarities of the magnetic fluxes formed by said detecting lines or the polarities of the elctric currents formed in said detecting lines are inverted for every other magnetic bodies or every two or more magnetic bodies.
Claim 7
Dependent Claim
76 words
A position detecting apparatus according to any one of claims 2 to 4, characterized in that either the X- and Y-direction exciting lines or the X- and Y-direction detecting lines or, alternatively, both of the X- and Y-direction exciting lines and X- and Y-direction detecting lines corresponding to X- and Y-direction magnetic bodies (81a,81f) disposed at both ends of respective parallel rows are arranged closely to said magnetic bodies as compared with other exciting and/or-detecting lines.
Claim 8
Dependent Claim
48 words
A position detecting apparatus according to any one of claims 2 to 5, characterized in that said exciting lines (82a,82b,82i,82j) are arranged more densely at both longitudinal ends of said magnetic bodies of said X- and Y-direction position detecting sections than at other portions of said magnetic bodies.
References Cited (Backward Citations)
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