In phase T1 (corresponding to a data writing phase), GATE1=1, GATE2=1, and S_{pre_}L=1. The first scan signal terminal GATE1 is applied with a high-level signal so as to control the first switching transistor TFT1 to turn on. The data signal terminal DATA is applied with a data signal so that the data signal is input to the gate of the driving transistor TFT3. 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 close to apply the reset voltage V_PRESL on the sensing signal line SL, so that the reset voltage V_PRESL is input to the anode of the organic light-emitting diode OLED. In the T1 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 reset or initialized. The voltage V_g of the first node, namely, point g, is equal to the data voltage V_DATA. The voltage V_s of the second node, namely point s, is equal to the reset voltage V_PRESL. The voltage between point g and point s V_gs=V_DATA?V_PRESL.