CAPACITIVE SENSING USING A MATRIX ELECTRODE PATTERN
First Claim
1. An input device comprising:
- a plurality of sensor electrodes disposed in a matrix on a surface 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 of the plurality of sensor electrodes is 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.
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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.
77 Citations
20 Claims
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1. An input device comprising:
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a plurality of sensor electrodes disposed in a matrix on a surface 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 of the plurality of sensor electrodes is 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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An input device comprising:
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a plurality of sensor electrodes disposed in a matrix on a surface 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 of the plurality of sensor electrodes is 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 first mode comprises driving a transmitter signal onto the first or second sensor electrodes and the second mode comprises receiving resulting signals with the first or second sensor electrodes, wherein the first sensor electrode and the second sensor electrode operate in the first and second modes, respectively, during an overlapping time period. - View Dependent Claims (8, 9, 10)
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11. An input device comprising:
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a plurality of sensor electrodes disposed in a matrix on a surface 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 of the plurality of sensor electrodes is 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 first mode comprises driving a modulated signal onto the first or second sensor electrodes and the second mode comprises driving the first or second sensor electrodes 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. - View Dependent Claims (12, 13, 14)
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15. A processing system comprising:
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a sensor module coupled to a plurality of sensor electrodes disposed in a matrix 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 of the plurality of sensor electrodes is 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. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification