ROW-BASED SENSING ON MATRIX PAD SENSORS
First Claim
1. An input device, comprising:
- a plurality of sensor electrodes arranged into a plurality of rows on a common surface of a substrate, wherein each of the rows comprises at least two of the sensor electrodes; and
a processing system, comprising;
a plurality of sensor modules selective coupled to the plurality of sensor electrodes, wherein the sensor modules are configured to, during a first time period, measure first capacitive sensing signals using a first row of the plurality of rows and, during a second time period, measure second capacitive sensing signals using a second row of the plurality of rows,wherein a frequency of the first capacitive sensing signals is different than a frequency of the second capacitive sensing signals, and wherein each of the rows is parallel with a side of the substrate used to electrically couple the sensor electrodes to the sensor modules.
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Accused Products
Abstract
This disclosure generally provides an input device that includes a matrix sensor that includes a plurality of sensor electrodes arranged in rows on a common surface or plane. The input device may include a plurality of sensor modules coupled to the sensor electrodes that measure capacitive sensing signals corresponding to the electrodes. Instead of measuring sensor electrodes that are in the same column, the embodiments herein simultaneously measure capacitive sensing signals on at least two sensor electrodes that are in the same row. In one example, the sensor electrodes in the row being measured are spaced the same distance from a side of a substrate coupling the electrodes to the sensor modules and may have approximately the same electrical time constant.
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Citations
20 Claims
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1. An input device, comprising:
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a plurality of sensor electrodes arranged into a plurality of rows on a common surface of a substrate, wherein each of the rows comprises at least two of the sensor electrodes; and a processing system, comprising; a plurality of sensor modules selective coupled to the plurality of sensor electrodes, wherein the sensor modules are configured to, during a first time period, measure first capacitive sensing signals using a first row of the plurality of rows and, during a second time period, measure second capacitive sensing signals using a second row of the plurality of rows, wherein a frequency of the first capacitive sensing signals is different than a frequency of the second capacitive sensing signals, and wherein each of the rows is parallel with a side of the substrate used to electrically couple the sensor electrodes to the sensor modules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. The input device of claim 1, further comprising:
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a first transmitter electrode corresponding to the first row; and a second transmitter electrode corresponding to the second row, wherein the processing system is configured to drive a first transmitting signal onto the first transmitter electrode during the first time period which results in the first capacitive sensing signals on the first row and drive a second transmitting signal onto the second row during the second time period which results in the second capacitive sensing signals on the second row. - View Dependent Claims (13, 14, 15)
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12-1. A processing system, comprising:
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selection logic configured to selectively couple to a plurality of sensor electrodes arranged in a plurality of rows on a common surface of a substrate; and a plurality of sensor modules selectively coupled to the plurality of sensor electrodes via the selection logic, wherein the sensor modules are configured to; during a first time period, measure first capacitive sensing signals using a first row of the plurality of rows; and during a second time period, measure second capacitive sensing signals using a second row of the plurality of rows, wherein a frequency of the first capacitive sensing signals is different than a frequency of the second capacitive sensing signals, and wherein each of the rows is parallel with a side of the substrate used to electrically couple the sensor electrodes to the sensor modules.
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16. A method comprising:
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measuring, during a first time period, first capacitive sensing signals using a first row of a plurality of rows of sensor electrodes disposed on a common surface of a substrate; and measuring, during a second time period, second capacitive sensing signals using a second row of the plurality of rows, wherein the first and second rows each comprises at least two sensor electrodes, wherein a frequency of the first capacitive sensing signals is different than a frequency of the second capacitive sensing signals, and wherein each of the plurality of rows is parallel with a side of the substrate used to electrically couple the sensor electrodes to a plurality of sensor modules. - View Dependent Claims (17, 18, 19, 20)
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Specification