Patent ID: 7592987

Claim:
A current-scaling active thin film transistor circuit structure for a pixel of a display device, comprising: a data line for providing a data current; a scanning line; a direct-current voltage source; a first storage capacitor; a second storage capacitor electrically connected to the first storage capacitor in series; and a plurality of transistors, comprising a first transistor, a second transistor, a third transistor, and a fourth transistor; wherein one terminal of the third transistor is electrically connected to the direct-current voltage source, the gate of the third transistor is electrically connected to one terminal of the second storage capacitor and the scanning line, one terminal of the fourth transistor is electrically connected to a light-emitting unit, the gate of the first transistor is electrically connected to the gate of the second transistor, and the gate of the first transistor and that of the second transistor are electrically connected to the scanning line.