Capacitive sensing using matrix electrodes driven by routing traces disposed in a source line layer

A processing system for a display device comprising a capacitive sensing device, the processing system comprising:

• a sensor module comprising sensor circuitry configured to be coupled to a plurality of sensor electrodes via a plurality of conductive routing traces, wherein each of the plurality of sensor electrodes comprises at least one of a plurality of common electrodes configured for display updating and absolute capacitive sensing, wherein the plurality of sensor electrodes is disposed in a first layer of a stack and the plurality of conductive routing traces is disposed in a second layer of the stack, and wherein each of the plurality of routing traces couples to only one of the plurality of sensor electrodes,
• wherein a plurality of source lines is disposed in the second layer of the stack, wherein the plurality of source lines is coupled to a plurality of sub-pixels corresponding to a display line of the display device, wherein a first subset of the plurality of sub-pixels in the display line is coupled to a first gate line and a second subset of the plurality of sub-pixels in the display line is coupled to a second gate line, wherein a first sensor electrode of the plurality of sensor electrodes is coupled to a first conductive routing trace of the plurality of conductive routing traces, wherein the first conductive routing trace is selectively coupled to a driver module and a receiver module of the processing system.

A matrix sensor comprising:

• a first layer comprising a plurality of sensor electrodes arranged in a matrix on a common surface in the first layer, wherein the plurality of sensor electrodes is arranged to perform absolute capacitive sensing;
• a second layer comprising a plurality of conductive routing traces and a plurality of source lines, wherein each of the plurality of conductive routing traces is coupled to a only one of the plurality of sensor electrodes on the first layer;
• and
• a third layer comprising display materials of a plurality of sub-pixels corresponding to a display line of a display device, wherein a first gate line of a plurality of gate lines is coupled to a first subset of the plurality of sub-pixels in the display line and a second gate line of the plurality of gate lines is coupled to a second subset of the plurality of sub-pixels in the display line, and wherein the plurality of sources lines is coupled to the plurality of sub-pixels, wherein a first sensor electrode of the plurality of sensor electrodes is coupled to a first conductive routing trace of the plurality of conductive routing traces, wherein the first conductive routing trace is selectively coupled to a driver module and a receiver module.