Magnetic sensor for use with hand-held devices
First Claim
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1. A system for controlling a portable device using magnetic-field sensing, the system comprising:
- a magnetic field-sensing device that is structured and arranged to sense changes in a magnetic field that accompany movement of the portable device;
a data acquisition unit that receives data signals transmitted from the magnetic field-sensing device;
memory for storing data that includes a plurality of pre-determined correlations between magnetic field changes resulting from movement of the portable device that are each uniquely associated with a discrete control operation; and
a control unit that analyzes signals from the data acquisition unit;
identifies characteristics of changes in a magnetic field that accompany movement of the portable device;
compares the characteristics of changes in a magnetic field with the plurality of pre-determined correlations; and
automatically executes the discrete control operation associated with the pre-determined correlations when the characteristics of changes in the magnetic field match the pre-determined correlations.
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Abstract
The use of magnetic field sensing to perform sophisticated command control and data input into a portable device is disclosed. A magnetic field sensor is embedded or fixedly attached to a portable device to measure changes in the magnetic field strength and/or direction accompanying movement, motion or tilt of the device in one-, two- or three-dimensions when the portable device is used to air-write or make gestures.
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Citations
10 Claims
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1. A system for controlling a portable device using magnetic-field sensing, the system comprising:
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a magnetic field-sensing device that is structured and arranged to sense changes in a magnetic field that accompany movement of the portable device; a data acquisition unit that receives data signals transmitted from the magnetic field-sensing device; memory for storing data that includes a plurality of pre-determined correlations between magnetic field changes resulting from movement of the portable device that are each uniquely associated with a discrete control operation; and a control unit that analyzes signals from the data acquisition unit;
identifies characteristics of changes in a magnetic field that accompany movement of the portable device;
compares the characteristics of changes in a magnetic field with the plurality of pre-determined correlations; and
automatically executes the discrete control operation associated with the pre-determined correlations when the characteristics of changes in the magnetic field match the pre-determined correlations. - View Dependent Claims (2, 3)
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4. A system for inputting data into a portable device using magnetic-field sensing, the system comprising:
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a magnetic field-sensing device that is structured and arranged to sense changes in a magnetic field that accompany movement of the portable device; a data acquisition unit that receives data signals transmitted from the magnetic field-sensing device; memory for storing data that includes a plurality of pre-determined correlations between magnetic field changes resulting from movement of the portable device that are each uniquely associated with a discrete control operation; and a control unit that analyzes signals from the data acquisition unit;
identifies characteristics of changes in a magnetic field that accompany motion or movement of the portable device;
compares the characteristics of changes in a magnetic field with the plurality of pre-determined correlations; and
automatically executes the discrete control operation associated with the pre-determined correlations when the characteristics of changes in the magnetic field match the pre-determined correlations. - View Dependent Claims (5, 6)
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7. A method for controlling a portable device using changes in at least one of a magnetic field strength and a magnetic field direction that accompany movement of the portable device to perform control operations, the method comprising:
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installing or embedding a magnetic-field sensing device in the portable device; providing a plurality of pre-determined correlations between changes in magnetic field properties due to movements and discrete control operations; detecting changes in magnetic field properties due to movements of the portable device with the magnetic-field sensing device; comparing the changes in magnetic field properties due to movements with the plurality of pre-determined correlations; and initiating the discrete control operation that is associated with the corresponding correlation so detected. - View Dependent Claims (8)
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9. A method for inputting data into a portable device using movement of the portable device to perform control operations, the method comprising:
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installing or embedding a magnetic-field sensing device in the portable device; providing a plurality of pre-determined correlations between changes in magnetic field properties due to movements and discrete control operations; detecting changes in magnetic field properties due to movements of the portable device with the magnetic-field sensing device; comparing the changes in magnetic field properties due to movements with the plurality of pre-determined correlations; and initiating the discrete input operation that is associated with the corresponding correlation so detected. - View Dependent Claims (10)
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Specification