Pixel driving circuit, display apparatus and terminal

A pixel driving circuit, comprising:

• a light-emitting device, an enabling unit, a first transistor, and a second transistor;
• wherein a first terminal of the light-emitting device connects with a first terminal of the enabling unit, and a second terminal of the light-emitting device is grounded, a power voltage (Vdd) accesses a second terminal of the enabling unit, a power voltage (Vdd) is applied to a second terminal of the enabling unit, a third terminal of the enabling unit connects with a source of the first transistor, a fourth terminal of the enabling unit receives a operating voltage (Vi), and a drain of the first transistor connects with a source of the second transistor, a gate of the first transistor receives a first enabling signal (EM[N+3]), and a gate of the second transistor receives a first scanning signal (Scan[N]), a drain of the second transistor is coupled with a grayscale data voltage (Vdata) signal, wherein the first enabling signal (EM[N+3]) and the first scanning signal (Scan[N]) are adapted for controlling the source of the first transistor to receive the grayscale data voltage (Vdata);
• and
• wherein saturated current passing through the light-emitting device is relevant to the voltage of the power and the grayscale data voltage, when the light-emitting device emits light.