Touch sensor having a single sensor layer
First Claim
1. A touch sensor comprising:
- a dielectric surface layer;
a plurality of drive electrodes disposed on the dielectric surface layer and arranged radially about a center, the drive electrodes defining a perimeter about the center, wherein each drive electrode comprises;
an outer radial section extending radially along the perimeter;
a central section extending from the outer radial section towards the center; and
an inner radial section comprising a first section extending radially away from the central section in a first radial direction and a second section, shorter than the first section, extending radially away from the central section in a second radial direction; and
a sense electrode disposed on the dielectric surface layer and arranged between two of the drive electrodes, wherein a distance between the sense electrode and the outer radial section of each of the two of the drive electrodes is associated with a thickness of each section of the drive electrode.
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Accused Products
Abstract
In one aspect, a touch sensor includes a dielectric surface layer; drive electrodes disposed on the dielectric surface layer and arranged radially about a center, the drive electrodes defining a perimeter about the center, and a sense electrode disposed on the dielectric surface layer and arranged between two of the drive electrodes. Each drive electrode can include: an outer radial section extending radially along the perimeter; a central section extending from the outer radial section towards the center; and an inner radial section comprising a first section extending radially away from the central section in a first radial direction and a second section, shorter than the first section, extending radially away from the central section in a second radial direction.
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Citations
20 Claims
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1. A touch sensor comprising:
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a dielectric surface layer; a plurality of drive electrodes disposed on the dielectric surface layer and arranged radially about a center, the drive electrodes defining a perimeter about the center, wherein each drive electrode comprises; an outer radial section extending radially along the perimeter; a central section extending from the outer radial section towards the center; and an inner radial section comprising a first section extending radially away from the central section in a first radial direction and a second section, shorter than the first section, extending radially away from the central section in a second radial direction; and a sense electrode disposed on the dielectric surface layer and arranged between two of the drive electrodes, wherein a distance between the sense electrode and the outer radial section of each of the two of the drive electrodes is associated with a thickness of each section of the drive electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 12, 13, 14, 15, 16)
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9. A touch sensor comprising:
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a dielectric surface layer; a plurality of drive electrodes disposed on the dielectric surface layer and collectively arranged in a rectangular pattern, wherein each drive electrode comprises; a first horizontal section extending along a horizontal direction; a vertical section extending along a vertical direction; and a second horizontal section extending along the horizontal direction from the vertical section towards an adjacent drive electrode; and a third horizontal section, shorter than the second horizontal section, extending along the horizontal direction from the vertical section towards the adjacent drive electrode; and a sense electrode disposed on the dielectric surface layer and arranged between two of the drive electrodes, wherein a distance between the sense electrode and the first horizontal section of each of the two of the drive electrodes is associated with a thickness of each section of the drive electrode. - View Dependent Claims (10, 11)
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17. A method performed by a touch sensor controller, the method comprising:
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sequentially applying multiple pulses to each drive electrode of a plurality of drive electrodes arranged radially about a center of a touch sensor, the drive electrodes defining a perimeter about the center, wherein each drive electrode comprises; an outer radial section extending radially along the perimeter; a central section extending from the outer radial section towards the center; and an inner radial section comprising a long section extending radially away from the central section in a first direction and a short section, shorter than the long section, extending radially away from the central section in a second direction; for each drive electrode, measuring a response from a plurality of sense electrodes to the pulse applied to the drive electrode; and determining a location on a surface of the touch sensor based on the measured responses, wherein one of the plurality of sense electrodes is arranged between two of the drive electrodes, and a distance between the sense electrode and the outer radial section of each of the two of the drive electrodes is associated with a thickness of each section of the drive electrode. - View Dependent Claims (18, 19, 20)
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Specification