TOUCH AND HOVER SENSING
First Claim
1. A capacitive sensing apparatus comprising:
- a sensor array comprising;
a first electrode at a first input location; and
a second electrode at a second input location adjacent to the first input location; and
a sensor control system configured to;
during a first scan of the sensor array;
transmit the first AC signal to the first electrode of the sensor array;
measure a self capacitance at the first input location; and
transmit the second AC signal to the second electrode of the sensor array without measuring a self capacitance at the second input location; and
during a second scan of the sensor array;
transmit the first AC signal to the first electrode of the sensor array without measuring the self capacitance at the first input location; and
measure the self capacitance at the second input location.
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Accused Products
Abstract
A capacitive sensing apparatus is disclosed. In some examples, the capacitive sensing apparatus includes a sensor control system configured to: during a first scan of the sensor array: transmit a first alternating current (AC) signal concurrently with a second alternating current (AC) signal to the sensor array, transmit the first AC signal to the first electrode of the sensor array, measure a self capacitance at the first input location, and transmit the second AC signal to the second electrode of the sensor array without measuring a self capacitance at the second input location, and during a second scan of the sensor array: transmit the first AC signal concurrently with the second AC signal to the sensor array, transmit the first AC signal to the first electrode of the sensor array without measuring the self capacitance at the first input location, and measure the self capacitance at the second input location.
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Citations
20 Claims
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1. A capacitive sensing apparatus comprising:
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a sensor array comprising; a first electrode at a first input location; and a second electrode at a second input location adjacent to the first input location; and a sensor control system configured to; during a first scan of the sensor array; transmit the first AC signal to the first electrode of the sensor array; measure a self capacitance at the first input location; and transmit the second AC signal to the second electrode of the sensor array without measuring a self capacitance at the second input location; and during a second scan of the sensor array; transmit the first AC signal to the first electrode of the sensor array without measuring the self capacitance at the first input location; and measure the self capacitance at the second input location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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during a first scan of a sensor array; transmitting a first alternating current (AC) signal concurrently with a second alternating current (AC) signal to the sensor array; transmitting the first AC signal to a first electrode of the sensor array at a first input location; measuring a self capacitance at the first input location; and transmitting the second AC signal to a second electrode of the sensor array at a second input location without measuring a self capacitance at the second input location, the second input location different from the first input location; and during a second scan of the sensor array; transmitting the first AC signal concurrently with the second AC signal to the sensor array; transmitting the first AC signal to the first electrode of the sensor array without measuring the self capacitance at the first input location; and measuring the self capacitance at the second input location. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A non-transitory computer-readable storage medium having stored therein instructions, which when executed by a processor cause the processor to perform a method comprising:
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during a first scan of a sensor array; transmitting a first alternating current (AC) signal concurrently with a second alternating current (AC) signal to the sensor array; transmitting the first AC signal to a first electrode of the sensor array at a first input location; measuring a self capacitance at the first input location; and transmitting the second AC signal to a second electrode of the sensor array at a second input location without measuring a self capacitance at the second input location, the second input location different from the first input location; and during a second scan of the sensor array; transmitting the first AC signal concurrently with the second AC signal to the sensor array; transmitting the first AC signal to the first electrode of the sensor array without measuring the self capacitance at the first input location; and measuring the self capacitance at the second input location. - View Dependent Claims (18, 19, 20)
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Specification