Method of controlling stylus pen of touch panel

1. A method of controlling a stylus pen of a touch panel, the touch panel being configured with a gate low voltage having a default level for turning off a driving transistor of the touch panel in a display period or a sensing period, the method comprising:

outputting an uplink control signal to a sensing electrode of the touch panel for controlling the stylus pen in an uplink control period; and

configuring the gate low voltage to a first level in the uplink control period, wherein the first level is lower than the default level, and the first level is used to turn off the driving transistor; and

wherein the gate low voltage is used to generate a gate control signal to be output to a gate line of the touch panel in the uplink control period.

2. The method of claim 1 , further comprising performing at least one of the following steps in the uplink control period:

outputting the gate low voltage in the first level as a direct-current (DC) voltage to the gate line of the touch panel;

applying a load-free driving signal to the gate line when the gate low voltage is in the first level; and

controlling the gate line to be floating when the gate line is in the first level.