CURSOR VELOCITY BEING MADE PROPORTIONAL TO DISPLACEMENT IN A CAPACITANCE-SENSITIVE INPUT DEVICE
First Claim
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1. A key cap touchpad useful for cursor manipulation and comprised of:
- a key cap manufactured using a material that does not interfere with capacitance measurements of a touchpad;
a capacitance sensitive key cap touchpad coupled to an underside of the key cap, to thereby perform proximity sensing of objects on or near a surface of the key cap;
touchpad sensor circuitry coupled to the key cap touchpad; and
firmware associated with the touchpad for cursor manipulation, wherein a distance that a finger is moved away from a center of the key cap determines velocity of an associated display cursor.
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Abstract
A miniature touchpad disposed underneath a single key cap of a keyboard, wherein the touchpad is disposed within the key cap and provides sensing through the key cap to the key cap surface, wherein a user moves a finger across the key cap surface in order to manipulate a cursor on a display screen, wherein velocity of the cursor on the display screen and direction of movement are both relative to the distance and radial direction of the fingertip from the center of the key cap.
115 Citations
40 Claims
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1. A key cap touchpad useful for cursor manipulation and comprised of:
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a key cap manufactured using a material that does not interfere with capacitance measurements of a touchpad;
a capacitance sensitive key cap touchpad coupled to an underside of the key cap, to thereby perform proximity sensing of objects on or near a surface of the key cap;
touchpad sensor circuitry coupled to the key cap touchpad; and
firmware associated with the touchpad for cursor manipulation, wherein a distance that a finger is moved away from a center of the key cap determines velocity of an associated display cursor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for performing cursor manipulation using a single key cap, said method comprising the steps of:
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(1) providing a key cap, a capacitance sensitive key cap touchpad coupled to an underside of the key cap to thereby perform proximity sensing of objects on or near a surface of the key cap, touchpad sensor circuitry coupled to the capacitance sensitive touchpad, and firmware associated with the touchpad for cursor manipulation, wherein a distance that a finger is moved away from a center of the key cap determines velocity of an associated display cursor; and
(2) moving a finger across the key cap surface to thereby perform cursor manipulation. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification