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 a first resulting signal received with at least one sensor electrode during a first half sensing period of a sensing period and a second resulting signal received with the at least one sensor electrode during a second half sensing period of the sensing period;
wherein;
the first half sensing period includes a first display blanking period and a first reset period;
the second half sensing period includes a second display blanking period and a second reset period;
the first reset period occurs between the first display blanking period and the second display blanking period and overlaps at least a first output display line period; and
the second reset period occurs between the second display blanking period and a third display blanking period and overlaps at least a second output display line period;
wherein the at least one sensor electrode comprises at least one display electrode of a plurality of display electrodes, and wherein the at least one display electrode is configured to be driven for display updating and capacitive sensing.
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Accused Products
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.
327 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 a first resulting signal received with at least one sensor electrode during a first half sensing period of a sensing period and a second resulting signal received with the at least one sensor electrode during a second half sensing period of the sensing period; wherein; the first half sensing period includes a first display blanking period and a first reset period; the second half sensing period includes a second display blanking period and a second reset period; the first reset period occurs between the first display blanking period and the second display blanking period and overlaps at least a first output display line period; and the second reset period occurs between the second display blanking period and a third display blanking period and overlaps at least a second output display line period; wherein the at least one sensor electrode comprises at least one display electrode of a plurality of display electrodes, and wherein the at least one display electrode is configured to be driven for display updating and capacitive sensing. - 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 first resulting signal received with a plurality of sensor electrodes during a first half sensing period of a sensing period, the first half sensing period includes a first display blanking period and a first reset period; updating a first one or more display lines after the first display blanking period; placing an analog front end in a reset mode during the first reset period overlapping with the updating of the first one or more display; acquiring sensor data using a second resulting signal received with the plurality of sensor electrodes during a second half sensing period of the sensing period, the second half sensing period includes a second display blanking period and a second reset period; updating a second one or more display lines after the first display blanking period; and placing the analog front end in the reset mode during the second reset period overlapping with the updating of the second one or more display lines, wherein the first reset period occurs between the first display blanking period and the second display blanking period, and the second reset period occurs between the second display blanking period and a third display blanking period, and wherein each of the plurality of sensor electrodes comprises at least one display electrode of a plurality of display electrodes, and wherein the at least one display electrode is configured to be driven for display updating and capacitive sensing. - 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 a first resulting signal received with one or more sensor electrodes during a first half sensing period of a sensing period, the first half sensing period includes a first display blanking period and a first reset period; enter a reset mode during the first reset period, the first reset period overlapping with a first display line update period following the first display blanking period; acquire sensor data using a second resulting signal received with the one or more sensor electrodes during a second half sensing period of the sensing period, the second half sensing period includes a second display blanking period and a second reset period, and following the first display update period; and enter the reset mode during the second reset period, the second reset period overlapping with a second display line update period following the second display blanking period, wherein the first reset period occurs between the first display blanking period and the second display blanking period, and the second reset period occurs between the second display blanking period and a third display blanking period. - View Dependent Claims (18, 19, 20)
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Specification