MATRIX SENSOR FOR IMAGE TOUCH SENSING
First Claim
1. A processing system for a capacitive sensing device, the processing system comprising:
- a sensor module comprising sensor circuitry coupled to a plurality of sensor electrodes and a field shaping electrode, the sensor module configured to;
drive and receive with each of the plurality of sensor electrodes to simultaneously acquire measurements of changes in absolute capacitance between each of the plurality of sensor electrodes and an input object;
selectively operate the field shaping electrode in a first mode and a second mode, wherein during at least one of the first mode and the second mode the field shaping electrode is configured to substantially isolate a first sensor electrode of the plurality of sensor electrodes from a second sensor electrode of the plurality of sensor; and
a determination module configured to determine positional information for the input object in a sensing region of the capacitive sensing device based on the measurements of changes in absolute capacitance,wherein selectively operating the field shaping electrode in the first mode and the second mode comprises operating the field shaping electrode in the second mode when the input object is determined to be in a second region of the sensing region and in the first mode when the input object is determined to be in a first region of the sensing region, wherein the first region of the sensing region is between the second region and an input surface of the sensing device.
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Accused Products
Abstract
Embodiments described herein include a display device having a capacitive sensing device, a processing system and a method for detecting presence of an input object using a capacitive sensing device. In one embodiment, the display device includes a plurality of sensor electrodes, a field shaping electrode, and a processing system. Each sensor electrode includes at least one common electrode. Dimensions of each sensor electrode correspond to dimension of pixel elements of the display device. The field shaping electrode is disposed between two of the plurality of sensor electrodes. Dimensions of the field shaping electrode correspond to the dimension of pixel elements of the display device. The field shaping electrode is laterally spaced apart from the two sensor electrodes a distance corresponding to dimensions of the pixel elements. The processing system is coupled to the sensor electrodes and the field shaping electrode. The processing system is configured to, in a first processing mode, drive a transmitter signal onto a first sensor electrode of the sensor electrodes and receiving a resulting signal with the first sensor electrode of the sensor electrodes comprising effects corresponding to the transmitter signal.
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Citations
25 Claims
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1. A processing system for a capacitive sensing device, the processing system comprising:
a sensor module comprising sensor circuitry coupled to a plurality of sensor electrodes and a field shaping electrode, the sensor module configured to; drive and receive with each of the plurality of sensor electrodes to simultaneously acquire measurements of changes in absolute capacitance between each of the plurality of sensor electrodes and an input object; selectively operate the field shaping electrode in a first mode and a second mode, wherein during at least one of the first mode and the second mode the field shaping electrode is configured to substantially isolate a first sensor electrode of the plurality of sensor electrodes from a second sensor electrode of the plurality of sensor; and a determination module configured to determine positional information for the input object in a sensing region of the capacitive sensing device based on the measurements of changes in absolute capacitance, wherein selectively operating the field shaping electrode in the first mode and the second mode comprises operating the field shaping electrode in the second mode when the input object is determined to be in a second region of the sensing region and in the first mode when the input object is determined to be in a first region of the sensing region, wherein the first region of the sensing region is between the second region and an input surface of the sensing device. - 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 sensor electrodes comprising a first sensor electrode and a second sensor electrode; a field shaping electrode; and a processing system coupled to the plurality of sensor electrodes and the field shaping electrode, the processing system configured to; drive and receive with each of the plurality of sensor electrodes to simultaneously acquire measurements of changes in absolute capacitance between each of the plurality of sensor electrodes and an input object; determine positional information for the input object in a sensing region of the capacitive sensing device based on the measurements of changes in absolute capacitance; and selectively operate the field shaping electrode in a first mode when the input object is determined to be in a first region of the sensing region based and in a second mode when the input object is determined to be in a second region of the sensing region, wherein the first region of the sensing region is between the second region and an input surface of the sensing device, wherein during at least one of the first mode and the second mode the field shaping electrode is configured to substantially isolate the first sensor electrode from the second sensor electrode. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for capacitive sensing, the method comprising:
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driving and receiving with each of a plurality of sensor electrodes to simultaneously acquire measurements of changes in absolute capacitance between each of the plurality of sensor electrodes and an input object; determining positional information for the input object in a sensing region of a capacitive sensing device based on the measurements of changes in absolute capacitance; and selectively operating a field shaping electrode in a first mode when the input object is determined to be in a first region of the sensing region based and in a second mode when the input object is determined to be in a second region of the sensing region, wherein the first region of the sensing region is between the second region and an input surface of the sensing device, wherein during at least one of the first mode and the second mode the field shaping electrode is configured to substantially isolate the first sensor electrode from the second sensor electrode. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification