In phase T3 (corresponding to a reset phase), GATE1=0, GATE2=1 and S_{pre_}L=1. The first scan signal terminal GATE1 is applied with a low-level signal so as to control the first switching transistor TFT1 to turn off. The second scan signal terminal GATE2 is applied with a high-level signal so as to control the second switching transistor TFT2 to turn on. At the same time, the reset switch S_{pre_}L is applied with a high-level signal so as to control the reset switch S_{pre_}L to close. The sensing signal line SL is applied with the reset voltage V_PRESL so that the reset voltage V_PRESL is input to the anode of the organic light-emitting diode OLED, and V_s=V_PRESL. As the voltage at the point s drops and V_g drops by the same amplitude, V_gs does not change and is stored in the energy storage capacitor Cst. In the T3 phase, the reset voltage V_PRESL is input to the anode of the organic light-emitting diode OLED, that is, the voltage of the anode of the OLED is re-initialized.