Patent ID: 10146388

Abstract:
A processing system for an integrated display and capacitive sensing device, where the display includes light-emitting diode (LED) pixels. The processing system includes isolated supply domains having inputs that receive an anode voltage and a cathode voltage, first outputs that supply modulated anode voltages, and second outputs that modulated cathode voltages, where the modulated anode voltages and the modulated cathode voltages are constant with respect to each other and modulated with respect to an external reference voltage. The processing system additionally includes a multiplexer circuit having inputs coupled the isolated supply domains, the anode voltage, and the cathode voltage, and having outputs coupled to the LED pixels. Further, the processing system includes control logic configured to control the multiplexer circuit to selectively supply the anode voltage and the cathode voltage, or the modulated anode voltages and the modulated cathode voltages, to the LED pixels.