Touch sensing system, electronic touch apparatus, and touch sensing method

An electronic touch apparatus, comprising:

• a touch sensing system, comprising:
• a touch interface;
• at least one sensing unit, coupled to the touch interface;
• a switching unit, switching the touch sensing system to a first sensing mode or a second sensing mode according to a control signal,
• wherein when the touch sensing system is in the first sensing mode, the sensing unit senses a first sensing signal and a second sensing signal of the touch interface, and when the touch sensing system is in the second sensing mode, the sensing unit senses the first sensing signal according to a driving signal;
• and
• a driving unit, directly connected to the switching unit and coupled a processing unit, and outputting the driving signal to the touch interface according to the control signal during the second sensing mode, wherein the at least one sensing unit and the driving unit are directly connected to different pins of the switching unit;
• and
• the processing unit, coupled to the sensing unit and the switching unit, generating the control signal, and determining at least one touch position on the touch interface according to at least one of the first sensing signal and the second sensing signal.

A touch sensing device, comprising:

• a driving unit;
• a first sensing unit, coupled to a touch interface;
• a second sensing unit;
• and
• a switching unit, coupled between the touch interface, the driving unit and the second sensing unit, wherein the switching unit controls the connection of the touch interface to the driving unit or the second sensing unit, and in response to a control signal, is switched to connect the touch interface to the second sensing unit in a first sensing mode and to connect the touch interface to the driving unit in a second sensing mode.