In phase T4 (corresponding to the light-emitting phase), GATE1=0, GATE2=1 and S_{pre_}L=0. 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 low-level signal so as to control the reset switch S_{pre_}L to open. The V_gs stored in the energy storage capacitor Cst controls the driving transistor TFT3 to turn on, and then the first voltage terminal EVDD charges the parasitic capacitance of the sensing signal line SL through the driving transistor TFT3, that is, the point s is charged until the organic light-emitting diode OLED is lit. At this time, V_s is equal to the voltage V_OLED of the anode of the organic light-emitting diode OLED. Due to a storage function of the energy storage capacitor Cst, as the voltage at the point s rises, V_g rises by the same amplitude, and V_gs remains unchanged. Since the second switching transistor TFT2 is turned on, the (parasitic capacitance of) the sensing signal line SL is charged through the second switching transistor TFT2.