Apparatus and method for reducing average scan rate to detect a conductive object on a sensing device
First Claim
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1. An apparatus, comprising:
- a plurality of capacitive sense elements;
a first capacitance sensor and a second capacitance sensor; and
a switch circuit configured to couple the plurality of capacitive sense elements to the first and second capacitance sensors in different modes,wherein the switch circuit is configured to couple the first capacitance sensor to a first group of two or more of the plurality of capacitive sense elements in a first mode,wherein the switch circuit is configured to couple the second capacitance sensor to a second group of two or more of the plurality of capacitive sense elements, andwherein the switch circuit is configured to couple at least one of the first or second capacitance sensors to individual ones of the two or more of the plurality of capacitive sense elements in one of the first or second groups in a second mode.
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Abstract
A switch circuit and method is described. In one embodiment, the switch circuit is configured to couple each of a plurality of plurality of capacitive sense elements and a plurality of capacitance sensors in different modes. In a first mode, the switch circuit is configured to couple each of the plurality of capacitance sensors to a group of two or more of the plurality of capacitive sense elements. In a second mode, the switch circuit is configured to couple the plurality of capacitance sensors to individual ones of the two or more of the plurality of capacitive sense elements in one of the groups.
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Citations
20 Claims
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1. An apparatus, comprising:
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a plurality of capacitive sense elements; a first capacitance sensor and a second capacitance sensor; and a switch circuit configured to couple the plurality of capacitive sense elements to the first and second capacitance sensors in different modes, wherein the switch circuit is configured to couple the first capacitance sensor to a first group of two or more of the plurality of capacitive sense elements in a first mode, wherein the switch circuit is configured to couple the second capacitance sensor to a second group of two or more of the plurality of capacitive sense elements, and wherein the switch circuit is configured to couple at least one of the first or second capacitance sensors to individual ones of the two or more of the plurality of capacitive sense elements in one of the first or second groups in a second mode. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus, comprising:
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a two-dimensional capacitive sense array comprising a plurality of rows of capacitive sense elements and a plurality of columns of capacitive sense elements; a first capacitance sensor; a second capacitance sensor; and a switch circuit configured to couple the first and second capacitance sensors to the two-dimensional capacitive sense array in different modes, wherein; in a first mode, the switch circuit is configured to couple the first capacitance sensor to a first group of two or more of the plurality of rows, and to couple the second capacitance sensor to a second group of two or more of the plurality of rows; in a second mode, the switch circuit is configured to couple the second capacitance sensor to a third group of two or more of the plurality of columns, and to couple the second capacitance sensor to a fourth group of two or more of the plurality of columns; in a third mode, the switch circuit is configured to couple at least one of the first capacitance sensor or the second capacitance sensor to individual ones of the two or more of the plurality of rows in one of the first or second groups of rows; and in a fourth mode, the switch circuit is configured to couple at least one of the first capacitance sensor or the second capacitance sensor to individual ones of the two or more of the plurality of columns in one of the third or fourth groups of columns. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A method, comprising
coupling a plurality of capacitance capacitive sense elements to a first capacitance sensor and a second capacitance sensor in different modes, wherein said coupling comprises: -
coupling, using a switch circuit, the first capacitance sensor to a first group of two or more of the plurality of capacitive sense elements in a first mode; coupling, using the switch circuit, the second capacitance sensor to a second group of two or more of the plurality of capacitive sense elements in the first mode; and coupling, using the switch circuit, at least one of the first capacitance sensor or the second capacitance sensor to individual ones of the two or more of the plurality of capacitive sense elements in one of the first group or second group in a second mode. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification