CAPACITIVE SENSOR FOR A DIGITIZER SYSTEM
First Claim
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1. A pressure sensitive capacitive sensor for a digitizer system, the capacitive sensor comprising:
- an interaction surface over which a user interacts with the capacitive sensor;
at least one sensing layer operable to sense interaction by mutual capacitive sensing, the at least one sensing layer extending across the interaction surface, wherein the at least one sensing layer is patterned with row and column sensing strips arranged in a grid; and
an additional layer comprising resilient properties and operable to be locally compressed responsive to pressure locally applied on the interaction surface during user interaction with the capacitive sensor.
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Abstract
A pressure sensitive capacitive sensor for a digitizer system includes an interaction surface over which a user interacts with the capacitive sensor, at least one sensing layer operable to sense interaction by mutual capacitive sensing, the at least one sensing layer extending across the interaction surface, and an additional layer comprising resilient properties and operable to be locally compressed responsive to pressure locally applied on the interaction surface during user interaction with the capacitive sensor.
105 Citations
24 Claims
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1. A pressure sensitive capacitive sensor for a digitizer system, the capacitive sensor comprising:
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an interaction surface over which a user interacts with the capacitive sensor; at least one sensing layer operable to sense interaction by mutual capacitive sensing, the at least one sensing layer extending across the interaction surface, wherein the at least one sensing layer is patterned with row and column sensing strips arranged in a grid; and an additional layer comprising resilient properties and operable to be locally compressed responsive to pressure locally applied on the interaction surface during user interaction with the capacitive sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A pressure sensitive touch screen comprising:
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an interaction surface over which a user interacts with the touch screen; at least one sensing layer operable to sense interaction by mutual capacitive sensing, the at least one sensing layer extending across the interaction surface, wherein the at least one sensing layer is patterned with row and column sensing strips arranged in a grid; an additional layer comprising resilient properties and operable to be locally compressed responsive to pressure locally applied on the interaction surface; and a flat panel display. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method for sensing applied pressure with a capacitive sensor that includes a resilient layer, the method comprising:
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scan output from a capacitive sensor; identify an interaction point; detect pressure profile around the interaction point; and determine pressure applied at the interaction point responsive to a feature of the detected pressure profile. - View Dependent Claims (21, 22, 23, 24)
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Specification