MATRIX SENSOR FOR IMAGE TOUCH SENSING
First Claim
1. A processing system for an input device, the processing system comprising;
- a sensor module, comprising sensor circuitry configured to couple to a plurality of sensor electrodes, the sensor module is configured to drive a first sensor electrode of the plurality sensor electrodes to acquire first changes of absolute capacitance during a first non-display update period of a display frame and a second sensor electrode of the plurality of sensor electrodes to acquire second changes of absolute capacitance during a second non-display update period of the display frame, wherein the first non-display update period and the second non-display update period occur between different pairs of display line update periods of the display frame and are at least as long as a display line update period the display frame.
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Accused Products
Abstract
Embodiments described herein include an input device, 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, an input device includes a plurality of sensor electrodes arranged in a planar matrix array. Each sensor electrode is coupled to unique routing trace and has an identical geometric plan form that is symmetrical about a center of area of the sensor electrode. The geometric plan form of each sensor electrode includes core and a plurality of protrusions extending outward from the core. The protrusions are configured to overlap with protrusions extending outward from each adjacent sensor electrode of the matrix array.
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Citations
20 Claims
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1. A processing system for an input device, the processing system comprising;
a sensor module, comprising sensor circuitry configured to couple to a plurality of sensor electrodes, the sensor module is configured to drive a first sensor electrode of the plurality sensor electrodes to acquire first changes of absolute capacitance during a first non-display update period of a display frame and a second sensor electrode of the plurality of sensor electrodes to acquire second changes of absolute capacitance during a second non-display update period of the display frame, wherein the first non-display update period and the second non-display update period occur between different pairs of display line update periods of the display frame and are at least as long as a display line update period the display frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An input device comprising:
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a plurality of sensor electrodes, each sensor electrode of the plurality of sensor electrodes comprising at least one common electrode of a plurality of common electrodes of a display device, the plurality of sensor electrode disposed in a matrix array of discrete sensor electrodes; a processing system coupled to the plurality of sensor electrodes and configured to; drive a first sensor electrode of the plurality of sensor electrodes for capacitive sensing during a first non-display update period of a display frame, drive a second sensor electrode of the plurality of sensor electrodes for capacitive sensing during a second non-display update period of the display frame, wherein the display frame, wherein the display frame comprises a plurality of display line update periods and wherein the first non-display update period and the second non-display update period occur between different pairs of the plurality of display line update periods and wherein the first non-display update period and the second non-display update period are at least as long as one of the display line update periods. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method for capacitive sensing with a display device comprising an integrated capacitive sensing device, the method comprising:
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driving a first plurality sensor electrodes to acquire first changes of absolute capacitance during a first non-display update period of a display frame and a second plurality of sensor electrodes to acquire second changes of absolute capacitance during a second non-display update period of the display frame, wherein the first non-display update period occurs between a fist and second display line update period of the display frame and wherein the second non-display update period occurs between a third and fourth display update period of the display frame; and determining a capacitive image based on the first and second changes of absolute capacitance. - View Dependent Claims (18, 19, 20)
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Specification