SENSING AN ACTIVE DEVICE'S TRANSMISSION USING TIMING INTERLEAVED WITH DISPLAY UPDATES
First Claim
1. A processing system for a capacitive sensing device, comprising:
- a sensor module comprising sensor circuitry configured to acquire sensor data using one or more sensor electrodes of a plurality of sensor electrodes during one or more display blanking periods, wherein a first half sensing period occurs during a first display blanking period and a second half sensing period occurs during a second display blanking period, and wherein a display update period occurs between the first display blanking period and the second display blanking period, wherein each sensor electrode comprises at least one display electrode of a plurality of display electrodes, and wherein each display electrode is configured to be driven for display updating and capacitive sensing; and
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wherein the sensor module acquires sensor data using a first resulting signal from the first half sensing period and a second resulting signal from the second half sensing period.
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Abstract
Embodiments described herein include an input device with a plurality of sensor electrodes, where each sensor electrode includes at least one display electrode of a plurality of display electrodes, and where each display electrode is configured to be driven for display updating and capacitive sensing. The input device also includes a processing system configured to acquire sensor data using one or more sensor electrodes during one or more display blanking periods, where a first half sensing period occurs during a first display blanking period and a second half sensing period occurs during a second display blanking period. The processing system acquires sensor data using a first resulting signal from the first half sensing period and a second resulting signal from the second half sensing period.
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Citations
20 Claims
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1. A processing system for a capacitive sensing device, comprising:
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a sensor module comprising sensor circuitry configured to acquire sensor data using one or more sensor electrodes of a plurality of sensor electrodes during one or more display blanking periods, wherein a first half sensing period occurs during a first display blanking period and a second half sensing period occurs during a second display blanking period, and wherein a display update period occurs between the first display blanking period and the second display blanking period, wherein each sensor electrode comprises at least one display electrode of a plurality of display electrodes, and wherein each display electrode is configured to be driven for display updating and capacitive sensing; and
;wherein the sensor module acquires sensor data using a first resulting signal from the first half sensing period and a second resulting signal from the second half sensing period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating an input device, comprising:
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acquiring sensor data using a plurality of sensor electrodes during a first display blanking period, wherein an analog front end associated with the plurality of sensor electrodes is in a reset mode during the first display blanking period; updating one or more display lines after the first display blanking period, wherein the analog front end remains in the reset mode after the first display blanking period; acquiring sensor data using the plurality of sensor electrodes during a second display blanking period, wherein the analog front end remains in the reset mode during the second display blanking period; and integrating sensor data acquired during the first and second display blanking periods to detect a communication signal from an active device. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An input device, comprising:
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a plurality of sensor electrodes, wherein each sensor electrode comprises at least one display electrode of a display, and wherein each display electrode is configured to be driven for display updating and capacitive sensing; and a processing system configured to; acquire sensor data using one or more sensor electrodes during a first display blanking period while in a reset mode; remain in the reset mode during a display update period following the first display blanking period; acquire sensor data using one or more sensor electrodes during a second display blanking period following the display update period while remaining in the reset mode; and integrate the acquired sensor data during the first and second display blanking periods to detect a communication signal from an active device. - View Dependent Claims (18, 19, 20)
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Specification