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 of 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 of 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.
336 Citations
19 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 of 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 of 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 electrodes 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, and 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 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 of 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 first and second display line update periods of the display frame and wherein the second non-display update period occurs between third and fourth display update periods of the display frame, wherein the first and second non-display update periods are at least as long as a display line 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)
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Specification