In the light-emission phase T3, the light-emission control signal EM at a low level controls the first switch transistor M1 and the sixth switch transistor M6 to be turned on. The first switch transistor M1 which is turned on provides the first terminal of the storage capacitor Cst with the reference voltage signal Vref at original V_ref(0), so that the voltage at the first terminal of the storage capacitor Cst is V_ref(0). Since the control electrode of the driver transistor M0 is floating, voltage at the second terminal of the storage capacitor Cst jumps to V_dd(1)+V_th?V_data+V_ref(0) due to the coupling of the storage capacitor Cst. At this time, the driver transistor M0 is turned on to drive the light-emitting element L to emit light. At this time, the high-voltage signal VDD received at the first electrode of the driver transistor M0 is detected as the high-voltage signal VDD at the voltage V_dd(2) received by the driver transistor M0 in the current frame, that is, at this time, the voltage at the first electrode of the driver transistor M0 is V_dd(2). Compensation voltage ΔV_dd corresponding to the pixel circuit is determined according to the high-voltage signal VDD at the voltage V_dd(2) in the current frame, and the pre-stored high-voltage signal VDD at the voltage V_dd(2) in the preceding frame, that is, ΔV_dd=V_dd(2)?V_dd(1). Upon determining that ΔV_dd lies out of the preset range, V_ref(0)+ΔV_dd is applied to the first electrode of the first switch transistor M1, so that the voltage at the first terminal of the storage capacitor Cst becomes V_ref(0)+ΔV_dd, and the voltage at the second terminal of the storage capacitor Cst jumps to V_dd(1)+V_th?V_data+V_ref(0)+ΔV_dd. Since voltage at the source of the driver transistor M0 is V_dd(2), voltage at the gate thereof is V_dd(1)+V_th?V_data+V_ref(0)+ΔV_dd. As per the current characteristic of the saturated driver transistor M0, current I_L flowing through the driver transistor M0 satisfies the equation of I_L=K[V_dd(1)+V_th?V_data+V_ref(0)+ΔV_dd?V_dd(2)?V_th]², and since ΔV_dd=V_dd(2)?V_dd(1), I_L=K[V_ref(0)?V_data]². Accordingly voltage compensation can be performed on the reference voltage signal applied to the pixel circuit to thereby avoid the problem that when two adjacent frames of images are different, there is different high-voltage signal VDD received at the first electrode of the driver transistor M0, thus resulting in crosstalk between the images while a finger of a user is touching on and sliding over the images, and deteriorating a display effect of the images.