Touch sensor having improved edge response
First Claim
1. A sensor comprising:
- a planar sensing area including a sensor layout, the sensor layout comprising;
an interior portion, an edge portion, and edges;
interior sensing elements, the interior sensing elements being located in the interior portion; and
edge sensing elements, the edge sensing elements being located in the edge portion, wherein;
the interior sensing elements are arranged in the sensor layout such that at least half of the interior sensing elements do not extend beyond a predetermined distance from the edges; and
the edge sensing elements are arranged to extend beyond the predetermined distance and interlace with the interior sensing elements in the interior portion, wherein;
the interior sensing elements and the edge sensing elements each have widths that vary non-monotonically from a center of the interior and edge sensing elements along two substantially perpendicular directions on the sensor layout, and centroid; and
the sensor determines a two-dimensional location for a touch overlapping the sensing elements using a weighting that is proportional to an overlap area of the sensor elements and their centroids;
a controller; and
a connector, the connector coupling the planar sensing area to the controller.
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Accused Products
Abstract
A sensor is provided. The sensor includes a planar sensing area including a sensor layout. The sensor layout includes an interior portion, an edge portion, and edges. The sensor layout also includes interior sensing elements, the interior sensing elements being located in the interior portion, and edge sensing elements, the edge sensing elements being located in the edge portion. The interior sensing elements are arranged in the sensor layout such that the interior sensing elements generally do not extend beyond a predetermined distance from the edges. Moreover, the edge sensing elements are arranged to extend beyond the predetermined distance and interlace with the interior sensing elements in the interior portion. The sensor further includes a controller and a connector, the connector coupling the planar sensing area to the controller.
29 Citations
18 Claims
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1. A sensor comprising:
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a planar sensing area including a sensor layout, the sensor layout comprising; an interior portion, an edge portion, and edges; interior sensing elements, the interior sensing elements being located in the interior portion; and edge sensing elements, the edge sensing elements being located in the edge portion, wherein; the interior sensing elements are arranged in the sensor layout such that at least half of the interior sensing elements do not extend beyond a predetermined distance from the edges; and the edge sensing elements are arranged to extend beyond the predetermined distance and interlace with the interior sensing elements in the interior portion, wherein; the interior sensing elements and the edge sensing elements each have widths that vary non-monotonically from a center of the interior and edge sensing elements along two substantially perpendicular directions on the sensor layout, and centroid; and the sensor determines a two-dimensional location for a touch overlapping the sensing elements using a weighting that is proportional to an overlap area of the sensor elements and their centroids; a controller; and a connector, the connector coupling the planar sensing area to the controller. - View Dependent Claims (2, 3, 4)
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5. A capacitive touch sensor for determining a two-dimensional location of a user touch, comprising:
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a touch surface, the touch surface formed as a two-dimensional plane and including a sensor element layout, the sensor element layout comprising; an interior portion, an edge portion, and edges; interior sensing elements, the interior sensing elements being located in the interior portion; and edge sensing elements, the edge sensing elements being located at the edge portion, wherein; the interior sensing elements are arranged in the sensor layout such that at least half of the interior sensing elements do not extend beyond a predetermined distance from the edges; and the edge sensing elements are arranged to extend beyond the predetermined distance and interlace with the interior sensing elements in the interior portion, wherein; the interior sensing elements and the edge sensing elements each have widths that vary non-monotonically from a center of the interior and edge sensing elements along two substantially perpendicular directions on the sensor layout, and centroid; and the sensor determines a two-dimensional location for a touch overlapping the sensing elements using a weighting that is proportional to an overlap area of the sensor elements and their centroids; a controller; and a connector, the connector coupling the touch surface to the controller. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method of manufacturing a capacitive touch sensor having an improved response, the method comprising:
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dividing a touch area of the capacitive touch sensor into an interior area and an edge area, wherein the edge area comprises an area of the touch area that extends from edges of the touch area inwards by a predetermined distance, and the interior area is a remaining area of the touch area; arranging edge sensor elements in the edge area in a pattern that covers the edge area and extends into the interior area while maintaining an edge sensor element width that varies non-monotonically from a center of the edge sensing element along two substantially perpendicular directions; and arranging interior sensor elements in the interior area in a pattern of the touch surface that covers the interior area while maintaining an interior sensor element width that varies non-monotonically from a center of the interior sensing element along two substantially perpendicular directions such that at least half of the interior sensor elements do not extend into the edge area, the edge sensor elements interlacing with the interior sensor elements in the interior area such that a location of a touch overlapping the edge and interior sensor elements is determined using a weighting that is proportional to a touch overlap area of the edge and interior sensor elements and their centroids. - View Dependent Claims (12, 13, 14, 15)
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16. A capacitive touch sensor for determining a two-dimensional location of a user touch, comprising:
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a touch surface, the touch surface formed as a two-dimensional plane and including a sensor element layout having a plurality of sensor elements, the sensor element layout comprising an interior portion, an edge portion, and edges, wherein; the plurality of sensor elements have widths that vary non-monotonically from a center of the sensor elements along two substantially perpendicular directions on the sensor layout, and centroid, wherein the sensor determines a two-dimensional location for a touch overlapping the sensing elements using a weighting that is proportional to an overlap area of the sensor elements and their centroids; and the edge portion is covered by an enclosure such that sensor elements that overlap the interior portion and edge portion are partially covered by the enclosure; a controller; and a connector, the connector coupling the touch surface to the controller. - View Dependent Claims (17, 18)
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Specification