| 摘要 |
The present invention relates to an apparatus for compensating for a difference in luminance of an organic light-emitting display device which includes a plurality of pixel circuits (Px) disposed in intersection regions where a plurality of gate lines supplying scan signals (Scan) and a plurality of data lines supplying image signals (V_data) intersect each other. Each of the pixel circuits comprises: an OLED; a drive transistor (TR2) which is connected between the OLED and a first voltage source (V_DD) and controls current flowing through the OLED; a switching transistor (TR1) which is connected between a gate electrode of the drive transistor and the data line and whose conduction state is controlled in response to the scan signal; setting transistors (TR3 and TR4) which apply reference voltage to a gate electrode of the drive transistor; and a first capacitor (C1) which charges voltage between the gate electrode of the drive transistor (TR2) and a second electrode during activation of the setting transistors (TR3 and TR4) as a threshold voltage (V_th) of the drive transistor (TR2). |
