Display apparatus including connecting electrode layer
摘要
說明書
During a data programming period, in case that the first scan signal Sn and the second scan signal Sn′ are supplied through the first scan line SL1 and the second scan line SL2, the switching transistor T2 and the compensation transistor T3 are turned on in response to the first scan signal Sn and the second scan signal Sn′. Here, the driving transistor T1 is diode-connected by the compensation transistor T3 that is turned on, and is biased in a forward direction. Then, a compensation voltage (Dm+Vth, where Vth has a negative value) that is obtained by subtracting a threshold voltage Vth of the driving transistor T1 from the data signal Dm supplied from the data line DL, is applied to the driving gate electrode of the driving transistor T1. The driving voltage ELVDD and the compensation voltage (Dm+Vth) are applied to opposite ends of the storage capacitor Cst, and the storage capacitor Cst stores an electric charge corresponding to a difference between voltages at opposite ends thereof.
During an emission period, the operation control transistor T5 and the emission control transistor T6 are turned on according to the emission control signal En supplied from the emission control line EL. The driving current is generated according to a difference between the voltage of the driving gate electrode of the driving transistor T1 and the driving voltage ELVDD, and the driving current is supplied to the organic light-emitting diode OLED via the emission control transistor T6.
As described above, some of the transistors T1 to T7 may include oxide semiconductor. For example, the compensation transistor T3 and the first initialization transistor T4 may include oxide semiconductor.
