Patent ID: 11900858
Assignee: LX SEMICON CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A power management integrated circuit comprising:
a multiplexer configured to receive a first input voltage in a first driving mode, receive a second input voltage in a second driving mode, select one of the first input voltage and the second input voltage, and output the selected input voltage as a multiplexer output voltage;
a buck circuit configured to lower a signal level of the multiplexer output voltage and transfer the multiplexer output voltage to a timing controller; and
a source readout voltage modulation circuit configured to change a signal waveform of the multiplexer output voltage and generate a modulated touch/display driving voltage and a common voltage,
wherein the source readout voltage modulation circuit is configured to provide the modulated touch/display driving voltage and the modulated common voltage to a source readout circuit so as to perform both a display driving and a touch driving in the first driving mode,
wherein an output port of the multiplexer is configured to transfer the multiplexer output voltage by forming a common node with the buck circuit and the source readout voltage modulation circuit disposed inside the power management integrated circuit.