Capacitive sensing using a matrix electrode pattern
First Claim
1. An input device comprising:
- a plurality of individual sensor electrodes disposed in a matrix format on a common plane of a first layer of a display panel; and
a processing system coupled to the plurality of sensor electrodes via a plurality of conductive routing traces in a second layer of the display panel, the processing system is configured to;
acquire a capacitive image frame with the plurality of sensor electrodes based on a pattern such that during a first time period of the pattern a first sensor electrode of the plurality of sensor electrodes is operated in a first mode and a second sensor electrode and a third sensor electrode of the plurality of sensor electrodes are operated in a second mode, and during a second time period of the pattern the first sensor electrode is operated in the second mode and the second sensor electrode is operated in the first mode, wherein the second sensor electrode is in a facing relationship with a first side of the first sensor electrode and the third sensor electrode is in a facing relationship with a second side of the first sensor electrode, and wherein the first and second sides are perpendicular,wherein, when operated according to the first mode, the first and second sensor electrodes are driven with a transmitter signal, and, when operated according to the second mode, the first, second, and third sensor electrodes receive respective resulting signals.
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Accused Products
Abstract
An electrode matrix that is used for capacitive sensing may be integrated into a display panel of an input device. In one embodiment, source drivers may be mounted on the display panel which drive the display signals and capacitive sensing signals into the display panel. In one embodiment, the capacitive sensing signals may be routed on traces or lines that are interleaved on the same layer as the source lines used for setting a voltage on the pixels in the display panel during display updating. Using the interleaved traces, the source drivers may drive the capacitive sensing signals in parallel to a plurality of the electrodes in the matrix in a predefined pattern that spans one or more sensing cycles.
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Citations
19 Claims
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1. An input device comprising:
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a plurality of individual sensor electrodes disposed in a matrix format on a common plane of a first layer of a display panel; and a processing system coupled to the plurality of sensor electrodes via a plurality of conductive routing traces in a second layer of the display panel, the processing system is configured to; acquire a capacitive image frame with the plurality of sensor electrodes based on a pattern such that during a first time period of the pattern a first sensor electrode of the plurality of sensor electrodes is operated in a first mode and a second sensor electrode and a third sensor electrode of the plurality of sensor electrodes are operated in a second mode, and during a second time period of the pattern the first sensor electrode is operated in the second mode and the second sensor electrode is operated in the first mode, wherein the second sensor electrode is in a facing relationship with a first side of the first sensor electrode and the third sensor electrode is in a facing relationship with a second side of the first sensor electrode, and wherein the first and second sides are perpendicular, wherein, when operated according to the first mode, the first and second sensor electrodes are driven with a transmitter signal, and, when operated according to the second mode, the first, second, and third sensor electrodes receive respective resulting signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An input device comprising:
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a plurality of individual sensor electrodes disposed in a matrix format on a common plane of a first layer of a display panel; and a processing system coupled to the plurality of sensor electrodes via a plurality of conductive routing traces in a second layer of the display panel, the processing system is configured to; acquire a capacitive image frame with the plurality of sensor electrodes based on a pattern such that during a first time period of the pattern first and second sensor electrodes of the plurality of sensor electrodes are operated in a first mode and third and fourth sensor electrodes of the plurality of sensor electrodes are operated in a second mode, and during a second time period of the pattern the first and second sensor electrodes are operated in the second mode and the third sensor electrode is operated in the first mode, wherein the third sensor electrode is in a facing relationship with a first side of the first sensor electrode and the fourth sensor electrode is in a facing relationship with a second side of the first sensor electrode, wherein the first and second sides are perpendicular, wherein, when operated according to the first mode, the first, second, and third sensor electrodes are driven with respective transmitter signals and, when operated according to the second mode, the first, second, third and fourth sensor electrodes receive respective resulting signals. - View Dependent Claims (10)
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11. An input device comprising:
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a plurality of individual sensor electrodes disposed in a matrix format on a common plane of a first layer of a display panel; and a processing system coupled to the plurality of sensor electrodes via a plurality of conductive routing traces in a second layer of the display panel, the processing system is configured to; acquire a capacitive image frame with the plurality of sensor electrodes based on a pattern such that during a first time period of the pattern a first sensor electrode of the plurality of sensor electrodes is operated in a first mode and a second sensor electrode and a third sensor electrode of the plurality of sensor electrodes are operated in a second mode, and during a second time period of the pattern the first sensor electrode and the third sensor electrode are operated in the second mode and the second sensor electrode is operated in the first mode, wherein, when operated according to the first mode, the first and second sensor electrodes are driven with a modulated signal to perform absolute capacitive sensing and, when operated according to the second mode, the first, second, and third sensor electrodes are driven with a guarding signal, wherein the first sensor electrode and the second sensor electrode operate in the first and second modes, respectively, during an overlapping time period, and wherein the second sensor electrode is in a facing relationship with a first side of the first sensor electrode and the third sensor electrode is in a facing relationship with a second side of the first sensor electrode, and wherein the first and second sides are perpendicular. - View Dependent Claims (12, 13, 14)
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15. A processing system comprising:
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a sensor module configured to couple to a plurality of individual sensor electrodes disposed in a matrix format on a first layer in a display panel, wherein the sensor electrodes are coupled to the sensor module via a plurality of conductive routing traces on a second layer in the display panel, the sensor module is configured to; acquire a capacitive image frame with the plurality of sensor electrodes based on a pattern such that during a first time period of the pattern a first sensor electrode of the plurality of sensor electrodes is operated in a first mode and a second sensor electrode and a third sensor electrode of the plurality of sensor electrodes are operated in a second mode, and during a second time period of the pattern the first sensor electrode is operated in the second mode and the second sensor electrode is operated in the first mode, wherein the second sensor electrode is in a facing relationship with a first side of the first sensor electrode and the third sensor electrode is in a facing relationship with a second side of the first sensor electrode, and wherein the first and second sides are perpendicular, wherein, when operated according to the first mode, the first and second sensor electrodes are driven with respective transmitter signals and, when operated according to the second mode, the first, second, and third sensor electrodes receive respective resulting signals. - View Dependent Claims (16, 17, 18, 19)
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Specification