Input device based on voltage gradients
First Claim
1. An input device comprising:
- a first drive electrode;
a first sense electrode disposed proximate to said first drive electrode; and
a processing system coupled with said first drive electrode and said first sense electrode, said processing system configured for;
electrically driving a first end of said first drive electrode and electrically driving a second end of said first drive electrode to cause a change in a voltage gradient along a length of said first drive electrode, wherein said change in said voltage gradient generates a first electrical signal on said first sense electrode;
acquiring a first measurement of said first electrical signal; and
determining positional information along said length of said first drive electrode based upon said first measurement, said positional information related to an input object.
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Accused Products
Abstract
An input device is disclosed, including a first drive electrode comprising a resistive material and a first sense electrode disposed proximate to the first drive electrode. The input device further includes a processing system which is coupled with the first drive electrode and the first sense electrode. In one embodiment, the processing system is configured for electrically driving a first end of the first drive electrode and electrically driving a second end of the first drive electrode to cause a change in a voltage gradient along a length of the first drive electrode. In such an embodiment, the change in the voltage gradient generates a first electrical signal in the first sense electrode. The processing system also acquires a first measurement of the first electrical signal and determines positional information along the length of the first drive electrode based upon the first measurement, wherein the positional information is related to an input object.
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Citations
27 Claims
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1. An input device comprising:
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a first drive electrode; a first sense electrode disposed proximate to said first drive electrode; and a processing system coupled with said first drive electrode and said first sense electrode, said processing system configured for; electrically driving a first end of said first drive electrode and electrically driving a second end of said first drive electrode to cause a change in a voltage gradient along a length of said first drive electrode, wherein said change in said voltage gradient generates a first electrical signal on said first sense electrode; acquiring a first measurement of said first electrical signal; and determining positional information along said length of said first drive electrode based upon said first measurement, said positional information related to an input object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of sensing, said method comprising:
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electrically driving a first end of a first drive electrode and electrically driving a second end of said first drive electrode to cause a change in a voltage gradient along a length of said first drive electrode, wherein said change in said voltage gradient generates a first electrical signal on a first sense electrode; acquiring a first measurement of said first electrical signal; and determining positional information along said length of said first drive electrode based upon said first measurement, said positional information related to an input object. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A processing system configured to:
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electrically drive a first end of a drive electrode and electrically drive a second end of said drive electrode to cause a change in a voltage gradient along a length of said drive electrode, wherein said change in said voltage gradient generates a first electrical signal on a sense electrode; acquire a first measurement of said first electrical signal; and determine positional information along said length of said drive electrode based upon said first measurement, said positional information related to an input object. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification