CAPACITIVE SENSING USING A MATRIX ELECTRODE PATTERN

摘要

An electrode matrix that is used for capacitive sensing may be integrated into a display panel of an input device. In one embodiment, source drivers may be mounted on the display panel which drive the display signals and capacitive sensing signals into the display panel. In one embodiment, the capacitive sensing signals may be routed on wires or lines that are interleaved on the same layer as the source lines used for setting a voltage on the pixels in the display panel during display updating. Using the interleaved wires, the source drivers may drive the capacitive sensing signals in parallel to a plurality of the electrodes in the matrix in a predefined pattern that spans one or more touch cycles.

主权项

1. An input device comprising:
a display device configured to sense input objects; a plurality of sensor electrodes disposed in a first layer of a stack, wherein each of the plurality of sensor electrodes comprises at least on common electrode of the display device and are configured for display updating and capacitive sensing; a first plurality of sub-pixels corresponding to a display line of the display device; a plurality of gate lines, wherein a first gate line of the plurality of gate lines is coupled to a first subset of the first plurality of sub-pixels and a second gate line of the plurality of gate lines is coupled to a second subset of the first plurality of sub-pixels; a plurality of conductive routing traces disposed in a second layer of the stack and coupled the plurality of sensor electrodes in the first layer; a plurality of source lines disposed in the second layer of the stack, the source lines are coupled to the plurality of sub-pixels; and a processing system coupled to the plurality of conductive routing traces, the processing system is configured to perform capacitive sensing using the plurality of sensor electrodes.