Capacitive position sensor
First Claim
1. A sensor comprising:
- 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, wherein the drive elements in a column or row are interconnected to each other by connection traces.
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Accused Products
Abstract
A sensor includes a substrate with a sensitive area defined by a pattern of electrodes. 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 may be coupled to a controller that includes 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.
139 Citations
23 Claims
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1. A sensor comprising:
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, wherein the drive elements in a column or row are interconnected to each other by connection traces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A sensor comprising:
a substrate having associated patterns of electrodes, wherein the patterns of electrodes include; a first group of discrete drive elements selectively interconnected to form a plurality of independently drivable rows electrodes extending along a first direction; a second group of discrete drive elements selectively interconnected to form a plurality of independently drivable column electrodes extending along a second direction; a group of sense elements interconnected to form a sense electrode extending along both the first and second directions; and wherein the drive and sense elements are formed as conductive geometric shapes selectively interconnected by conductive traces. - View Dependent Claims (23)
Specification