CAPACITIVE POSITION SENSOR
12 Assignments
0 Petitions
Accused Products
Abstract
A sensor for determining a position for an adjacent object in two dimensions is described. The sensor comprises a substrate with a sensitive area defined by a pattern of electrodes, wherein the pattern of electrodes includes a first group of drive elements interconnected to form a plurality of row electrodes extending along a first direction, a second group of drive elements interconnected to form a plurality of column electrodes extending along a second direction, and a group of sense elements interconnected to form a sense electrode extending along both the first and second directions. The sensor further comprises a controller comprising a drive unit for applying drive signals to the row and column electrodes, and a sense unit for measuring sense signals representing a degree of coupling of the drive signals applied to the row and column electrodes to the sense electrode. Thus a 2D position sensor requiring only a single sense channel is provided.
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Citations
38 Claims
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1-18. -18. (canceled)
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19. A sensor comprising:
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a substrate; a plurality of interconnected sense elements arranged in a first direction on a surface of the substrate; a first plurality of interconnected drive elements arranged on a surface of the substrate in the first direction, each respective one of the first plurality of interconnected drive elements being located adjacent to and between respective ones of the plurality of sense elements to form first sets of sense and drive elements alternating in the first direction; and a second plurality of interconnected drive elements arranged on a surface of the substrate in a second direction, each respective one of the second plurality of interconnected drive elements being located between respective ones of the plurality of sense elements to form first sets of sense and drive elements alternating in the second direction. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An electronic device, comprising:
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a housing; a touch-sensitive sensor disposed within the housing, the touch-sensitive sensor comprising; a substrate; a plurality of interconnected sense elements arranged in a first direction on a surface of the substrate; a first plurality of interconnected drive elements arranged on a surface of the substrate in the first direction, each respective one of the first plurality of interconnected drive elements being located adjacent to and between respective ones of the plurality of sense elements to form first sets of sense and drive elements alternating in the first direction; and a second plurality of interconnected drive elements arranged on a surface of the substrate in a second direction, each respective one of the second plurality of interconnected drive elements being located between respective ones of the plurality of sense elements to form first sets of sense and drive elements alternating in the second direction; and a controller in communication with the touch-sensitive sensor comprising a drive unit and sense unit, the drive unit configured to apply drive signals to the first and second pluralities of drive elements and a sense unit configured to sense signals representing a degree of coupling of the drive signals applied to the first and second plurality of drive elements to the sense electrodes. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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Specification