MATRIX SENSOR FOR IMAGE TOUCH SENSING

摘要

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.

主权项

1. A display device having an integrated capacitive sensing device, the display device comprising:
a plurality of sensor electrodes, wherein each sensor electrode of the plurality of sensor electrodes comprises at least one common electrode configured to be driven for display updating and capacitive sensing, and wherein the plurality of sensor electrodes are disposed in a matrix array of discrete sensor electrode; a processing system coupled to the sensor electrodes, the processing system is configured to:
simultaneously acquire first resulting signals with each of the plurality of sensor electrodes during a first period;acquire second resulting signals with a first sensor electrode of the plurality of sensor electrodes and drive a second sensor electrode of the plurality of sensor electrodes with a shielding signal during a second period;acquire third resulting signals with the second sensor electrode during a third period, wherein the first, second and third periods are non-overlapping; anddetermine first positional information for an input object based on the second and third resulting signals.