Patent ID: 11934615
Assignee: LX SEMICON CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A touch driving system comprising:
a touch driving device driving a plurality of touch electrodes disposed in a panel, and
a touch power management circuit outputting a finger touch driving signal to the touch driving device in a finger touch driving period and to output a pen touch driving signal to the touch driving device in a pen touch driving period,
wherein the touch power management circuit includes a load free driving (LFD) signal generating circuit to output a load free driving signal in the finger touch driving period and the pen touch driving period,
wherein a first modulation voltage and a second modulation voltage are alternated in the finger touch driving signal,
a first power voltage and a second power voltage are alternated in the pen touch driving signal,
a gate low voltage and a third modulation voltage are alternated in the load free driving signal during the finger touch driving period, and
the gate low voltage and a third power voltage are alternated in the load free driving signal during the pen touch driving period.