Polar sensor patterns
First Claim
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1. A capacitance sensing apparatus comprising:
- a plurality of sensor elements extending in a radial direction from a shared center, said plurality of sensor elements comprising;
a first subset of sensor elements that extend spiral-like in a clockwise direction; and
a second subset of sensor elements that extend spiral-like in a counterclockwise direction.
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Abstract
Patterns of sensor elements that can be used in capacitance sensing devices are described. A plurality of sensor elements extends in a radial direction from a shared center. A first subset of the sensor elements extend like spirals in a clockwise direction, and a second subset of the sensor elements extend like spirals in a counterclockwise direction.
33 Citations
28 Claims
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1. A capacitance sensing apparatus comprising:
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a plurality of sensor elements extending in a radial direction from a shared center, said plurality of sensor elements comprising;
a first subset of sensor elements that extend spiral-like in a clockwise direction; and
a second subset of sensor elements that extend spiral-like in a counterclockwise direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of sensing an object, said method comprising:
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receiving output signals from one or more sensor elements, wherein said sensor elements extend from a central position to the edges of said sensing region, wherein said sensor elements comprise a first subset of sensor elements that extend spiral-like in a clockwise direction about said central position and a second subset of sensor elements that extend spiral-like in a counterclockwise direction about said central position; and
determining a position within said sensing region by comparing measures of said outputs signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A capacitance sensing apparatus comprising:
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a plurality of radiating sensor elements, said plurality of sensor elements comprising a first subset of sensor elements and a second subset of sensor elements;
wherein at least two sensor elements within said first subset have rotation symmetry but not reflection symmetry and wherein at least two sensor elements within said second subset have rotation symmetry but not reflection symmetry; and
wherein a sensor element of said first subset and a sensor element of said second subset have reflection symmetry but not rotation symmetry. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification