Drive circuit, active pen, and touch panel

An active pen, comprising a drive circuit and a pen tip electrode connected to the drive circuit, wherein the drive circuit is configured to provide a drive voltage to the pen tip electrode, the drive circuit comprising:

• a first voltage generation circuit, at least one energy storage element, and a switch circuit, wherein the first voltage generation circuit and the at least one energy storage element are connected to the load through the switch circuit, the first voltage generation circuit is configured to output a first power supply voltage, and
• the switch circuit is configured to control the first voltage generation circuit to charge the load in a first phase until a voltage of the load reaches the first power supply voltage, control the load to discharge to the at least one energy storage element sequentially in a second phase, control the load to discharge to ground in a third phase, and control the at least one energy storage element to charge the load sequentially in a fourth phase, so that the voltage of the load rises and falls stepwise between different phases.

A touch panel, comprising a drive circuit and a touch electrode connected to the drive circuit, wherein the drive circuit is configured to provide a drive voltage to the touch electrode, the drive circuit comprising:

• a first voltage generation circuit, at least one energy storage element, and a switch circuit, wherein the first voltage generation circuit and the at least one energy storage element are connected to the load through the switch circuit, the first voltage generation circuit is configured to output a first power supply voltage, and
• the switch circuit is configured to control the first voltage generation circuit to charge the load in a first phase until a voltage of the load reaches the first power supply voltage, control the load to discharge to the at least one energy storage element sequentially in a second phase, control the load to discharge to ground in a third phase, and control the at least one energy storage element to charge the load sequentially in a fourth phase, so that the voltage of the load rises and falls stepwise between different phases.