Touch driving integrated circuit and operation method thereof and touch device

An operation method of a touch driving integrated circuit for driving a touch panel, the operation method comprising:

• communicating with an active stylus by a touch interface circuit of the touch driving integrated circuit, wherein the touch interface circuit is coupled to the touch panel;
• determining a touch position of the active stylus by an operation circuit of the touch driving integrated circuit in response to a stylus tip or a stylus tail of the active stylus touching the touch panel, wherein the operation circuit is coupled to the touch interface circuit;
• and
• determining to perform an eraser operation or a writing operation by the operation circuit based on stylus gesture information, wherein the stylus gesture information comprises a relative tilt angle between a tilt angle of the active stylus and a tile angle of the touch panel.

A touch device comprising:

• a system processor;
• a touch panel;
• and
• a touch driving integrated circuit coupled to the system processor and the touch panel, wherein the touch driving integrated circuit is configured to drive the touch panel, communicate with an active stylus, and perform an eraser operation or a writing operation based on stylus gesture information, wherein the stylus gesture information comprises a relative tilt angle between a tilt angle of the active stylus and a tile angle of the touch panel.