US 11,900,858 B2
Power management integrated circuit and display device including the same
Jung Min Choi, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX Semicon Co., Ltd., Daejeon (KR)
Filed on Dec. 29, 2022, as Appl. No. 18/091,066.
Claims priority of application No. 10-2021-0193824 (KR), filed on Dec. 31, 2021.
Prior Publication US 2023/0215340 A1, Jul. 6, 2023
Int. Cl. G09G 3/20 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G09G 3/2096 (2013.01) [G06F 3/0412 (2013.01); G06F 3/04166 (2019.05); G06F 3/044 (2013.01); G09G 2310/0289 (2013.01); G09G 2310/06 (2013.01); G09G 2330/021 (2013.01); G09G 2330/028 (2013.01); G09G 2354/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A power management integrated circuit comprising:
a multiplexer configured to receive a display voltage or a touch voltage transferred by a host, select one of the display voltage and the touch voltage, and output a multiplexer output voltage;
a buck circuit configured to receive the multiplexer output voltage, reduce a signal level of the multiplexer output voltage, and generate a driving voltage of a timing controller; and
a voltage modulation circuit configured to receive the multiplexer output voltage and generating a gate high voltage, a gate low voltage, a common voltage, and a touch/display driving voltage,
wherein the voltage modulation circuit is configured to modulate and output a waveform of at least one of the gate high voltage, the gate low voltage, the common voltage, and the touch/display driving voltage,
wherein the multiplexer is configured to receive the display voltage as an enable signal to determine an output timing of the multiplexer output voltage.