Capacitive Keyboard Having Variable Make Points
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Abstract
Disclosed herein is an input device having variable make points. More specifically, the various embodiments described herein are directed to an input device having a key, a first button member and a second button member. A dielectric may be positioned between the first button member and the second button member. The key is also associated with a capacitive sensor that is configured to determine a change in capacitance as a distance between the first button member and the second button member changes.
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Citations
40 Claims
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1-20. -20. (canceled)
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21. An input device comprising:
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a ground layer; a first member positioned on the ground layer; a second member positioned between the ground layer and the first member; a dielectric material positioned between the first member and the second member such that a capacitance between the first member and the second member changes as the first member is moved towards the second member; and a routing layer positioned on a side of the ground layer opposite the second member, wherein a first capacitance between the first member and the second member is associated with a first make point of the input device and a second capacitance between the first member and the second member is associated with a second make point of the input device. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An electronic device comprising:
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a ground layer having a first side and a second side; a substrate layer positioned on the second side of the ground layer; a routing layer positioned toward a side of the substrate layer opposite the ground layer; a first input device comprising; a first member positioned on the first side of the ground layer; a second member positioned on the first side of the ground layer between the ground layer and the first member; and a first dielectric material positioned between the first member and the second member such that a first capacitance between the first member and the second member changes as the first member is moved towards the second member; and a second input device comprising; a third member positioned on the first side of the ground layer; a fourth member positioned on the first side of the ground layer between the ground layer and the third member; a second dielectric material positioned between the third member and the fourth member such that a second capacitance between the third member and the fourth member changes as the third member is moved towards the fourth member; wherein; a value of the first capacitance greater than a first threshold and less than a second threshold is associated with a first make point of the first input device and a value of the first capacitance greater than the second threshold is associated with a second make point of the first input device; and a value of the second capacitance greater than a third threshold and less than a fourth threshold is associated with a first make point of the first input device and a value of second capacitance greater than the fourth threshold is associated with a second make point of the second input device. - View Dependent Claims (34)
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35. A method of detecting a gesture input to an input device of an electronic device, the input device comprising a first key and a second key, the method comprising:
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detecting a change in a capacitance at the first key between a first portion of the first key and a second portion of the first key; deciding that an actuation member is in proximity to the first key when the change in the capacitance at the first key is above a first threshold; detecting a subsequent change in a capacitance at the second key between a first portion of the second key and a second portion of the second key; detecting that the actuation member has moved to be in proximity to the second key when the change in the capacitance at the second key is above a second threshold; and deciding that a gesture input has occurred. - View Dependent Claims (36, 37, 38, 39, 40)
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Specification