CAPACITIVE TOUCH PANEL WITH HEIGHT DETERMINATION FUNCTION
First Claim
1. A capacitive touch sensor, comprising:
- a sensor substrate;
an array of electrode elements formed over the sensor substrate, each electrode element of the array including at least one ofa first electrode group comprising at least two drive electrodes and at least one sense electrode, ora second electrode group comprising at least two sense electrodes and at least one drive electrode,wherein the respective electrodes of the first or second electrode group are arranged to form multiple capacitances over different coupling distances; and
a controller operatively coupled to the array of electrode elements, the controller configured to determine a distance of an object relative to the surface of the touch sensor based on variations in the multiple capacitances.
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Abstract
A capacitive touch sensor includes a sensor substrate and an array of electrode elements formed over the sensor substrate. Each electrode element of the array includes at least one of a first electrode group comprising at least two drive electrodes and at least one sense electrode, or a second electrode group comprising at least two sense electrodes and at least one drive electrode. The respective electrodes of the first or second electrode group are arranged to form multiple capacitances over different coupling distances. A controller is operatively coupled to the array of electrode elements, the controller configured to determine a distance of an object relative to the surface of the touch sensor based on variations in the multiple capacitances.
58 Citations
28 Claims
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1. A capacitive touch sensor, comprising:
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a sensor substrate; an array of electrode elements formed over the sensor substrate, each electrode element of the array including at least one of a first electrode group comprising at least two drive electrodes and at least one sense electrode, or a second electrode group comprising at least two sense electrodes and at least one drive electrode, wherein the respective electrodes of the first or second electrode group are arranged to form multiple capacitances over different coupling distances; and a controller operatively coupled to the array of electrode elements, the controller configured to determine a distance of an object relative to the surface of the touch sensor based on variations in the multiple capacitances. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. The touch panel system according to claim 18, wherein the controller is configured to:
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provide a time varying voltage stimulus to the drive electrodes; and measure a charge that flows from the sense electrodes in response to the time varying voltage stimulus. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification