CONTACT SENSITIVE DEVICE
First Claim
Patent Images
1. A method of determining information relating to a contact on an active contact sensitive device comprising the steps of:
- providing a panel-form member capable of supporting bending wave vibration;
generating bending wave vibration in the member from one location on the member to probe for information relating to a contact;
contacting the member at a discrete location to produce a change in the generated bending wave vibration in the member;
measuring the changed bending wave vibration in the member at two locations on the member to determine a measured bending wave signal; and
processing the measured bending wave signal to calculate information relating to the contact including applying a correction to convert the measured bending wave signal to a propagation signal from a non-dispersive wave source.
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Abstract
Bending wave vibration is used to calculate information relating to a contact on a contact sensitive device. The contact sensitive device has a member capable of supporting bending waves, and a device attached to the member measures bending wave propagation in the member to determine a measured bending wave signal. The measured bending wave signal is processed to calculate information relating to the contact. The contact sensitive device may comprise a transparent touch sensitive plate mounted in front of a display device.
60 Citations
29 Claims
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1. A method of determining information relating to a contact on an active contact sensitive device comprising the steps of:
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providing a panel-form member capable of supporting bending wave vibration;
generating bending wave vibration in the member from one location on the member to probe for information relating to a contact;
contacting the member at a discrete location to produce a change in the generated bending wave vibration in the member;
measuring the changed bending wave vibration in the member at two locations on the member to determine a measured bending wave signal; and
processing the measured bending wave signal to calculate information relating to the contact including applying a correction to convert the measured bending wave signal to a propagation signal from a non-dispersive wave source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An active contact sensitive device comprising:
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a member capable of supporting bending wave vibration and forming an acoustic radiator when excited;
one or more exciters coupled to the member for exciting bending wave vibration in the member to probe for information relating to a contact made on a surface of the member, and to cause the member to produce an acoustic output;
at least one sensor coupled to the member for measuring bending wave vibration in the member; and
a processor operatively coupled to the at least one sensor for processing information relating to the contact from a change in bending wave vibration in the member produced by the contact and measured by the at least one sensor and for applying a correction to convert the measured bending wave signal to a propagation signal from a non-dispersive wave source. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An active contact sensitive device comprising:
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a member capable of supporting bending wave vibration, an emitting transducer coupled to the member for exciting bending wave vibration in the member to probe for information relating to the contact;
at least one sensor coupled to the member for measuring bending wave vibration in the member, and a processor operatively coupled to the at least one sensor for processing information relating to a contact made on a surface of the member from a change in bending wave vibration in the member created by the contact and measured by the at least one sensor and for applying a correction to convert the measured bending wave signal to a propagation signal from a non-dispersive wave source. - View Dependent Claims (21, 22)
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23. A method of determining information relating to a contact on a contact sensitive device comprising the steps of:
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providing a member capable of supporting bending wave vibration, generating bending wave vibration in the member to probe for information relating to a contact, contacting the member at a discrete location to produce a change in the generated bending wave vibration in the member, measuring the changed bending wave vibration in the member to determine a measured bending wave signal, and processing the measured bending wave signal to calculate information relating to the contact, including applying a correction to convert the measured bending wave signal to a propagation signal from a non-dispersive wave source.
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24. A method for use in a member capable of supporting bending wave vibration and forming an acoustic radiator when excited, the method comprising:
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exciting bending wave vibration using an emitting transducer coupled to the member;
measuring bending wave vibration in the member relating to a contact made on a surface of the member in at least one sensor coupled to the member; and
processing information relating to the contact measured by the at least one sensor and applying a correction to convert the measured bending wave signal to a propagation signal from a non-dispersive wave source to identify information relating to the contact. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification