A pixel and organic light-emitting diode (OLED) display are disclosed. In one aspect, the pixel includes an organic light-emitting diode (OLED) configured to emit light based on a driving current. The OLED includes first and second electrodes. The pixel also includes a first transistor configured to generate the driving current. The first transistor includes a gate electrode, a first electrode, and a second electrode. The pixel further includes a capacitor transistor including a gate electrode configured to receive a gate turn-on voltage, a first electrode, a second electrode electrically connected to the first electrode of the first transistor. The capacitor transistor further includes a channel located between the first and second electrodes of the capacitor transistor. The channel of the capacitor transistor is configured to be activated by the gate turn-on voltage.