DEVICE AND METHOD FOR DETECTING A POSITION OF A POSITION INDICATOR
First Claim
1. A device for detecting a position of a position indicator, comprising:
- an electrical magnetic field source configured to generate a magnetic field when an electrical current flows through the electrical magnetic field source;
a sensor configured to detect the magnetic field and provide sensor signals based on the magnetic field detected, the sensor comprising at least two 3D sensors each of which is configured to detect three spatial direction components of the magnetic field and output a signal corresponding to the respective spatial direction component;
an evaluator configured to receive the sensor signals and determine the position of the position indicator based on the sensor signals when the magnetic field in the surroundings of the electrical magnetic field source is influenced by the position indicator;
wherein the evaluator is configured to differentially measure, for determining the position of the position indicator, the magnetic field using the sensor signals of the at least two 3D sensors.
1 Assignment
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Accused Products
Abstract
A device for detecting a position of a position indicator includes an electrical magnetic field source, a sensor and an evaluator. The electrical magnetic field source is configured to generate a magnetic field when an electrical current flows through the electrical magnetic field source. The sensor is configured to detect the magnetic field and provide sensor signals based on the magnetic field detected, the sensor having at least two sensors each of which is configured to detect a spatial direction component of the magnetic field and output a signal corresponding to the spatial direction component. The evaluator is configured to receive the sensor signals and determine the position of a position indicator based on the sensor signals when the magnetic field in the surroundings of the electrical magnetic field source is influenced by the position indicator.
7 Citations
24 Claims
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1. A device for detecting a position of a position indicator, comprising:
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an electrical magnetic field source configured to generate a magnetic field when an electrical current flows through the electrical magnetic field source; a sensor configured to detect the magnetic field and provide sensor signals based on the magnetic field detected, the sensor comprising at least two 3D sensors each of which is configured to detect three spatial direction components of the magnetic field and output a signal corresponding to the respective spatial direction component; an evaluator configured to receive the sensor signals and determine the position of the position indicator based on the sensor signals when the magnetic field in the surroundings of the electrical magnetic field source is influenced by the position indicator; wherein the evaluator is configured to differentially measure, for determining the position of the position indicator, the magnetic field using the sensor signals of the at least two 3D sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A device for detecting a position of a position indicator, comprising:
- an electrical magnetic field source generating a magnetic field when an electrical current flows through the electrical magnetic field source;
a sensor configured to detect a magnetic field and to provide sensor signals based on the magnetic field detected, the sensor comprising at least two Hall sensors for detecting three spatial direction components of the magnetic field influenced by the position indicator, the sensors being configured to output a signal corresponding to the respective spatial direction component; an evaluator configured to receive the sensor signals and determine the position of the position indicator based on the sensor signals when the magnetic field in a surroundings of the electrical magnetic field source is influenced by the position indicator. - View Dependent Claims (23)
- an electrical magnetic field source generating a magnetic field when an electrical current flows through the electrical magnetic field source;
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24. A method for detecting a position of a position indicator, comprising:
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generating a magnetic field by means of an electrical current; detecting three spatial direction components of the magnetic field and providing sensor signals corresponding to the respective spatial direction components based on the magnetic field detected; receiving the sensor signals and determining the position of the position indicator based on the sensor signals by differentially measuring the magnetic field using the sensor signals of the at least two 3D sensors.
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Specification