Patent ID: 7006062

Claim:
A driving circuit of a display, wherein the display comprises a plurality of pixels, and each pixel further comprises: a first transistor, having a first drain, a first gate and a first source, wherein the first gate is coupled to a scan line, and the first drain is coupled to a data signal electrode which outputs a data current; a second transistor, having a second drain, a second gate and a second source, wherein the second drain is coupled to the first source, and the second gate is coupled to the scan line and the first gate; a third transistor, having a third drain, a third gate and a third source, wherein the third drain is coupled to the first source and the second drain, and the third gate is coupled to the second source; a fourth transistor, having a fourth drain, a fourth gate and a fourth source, wherein the fourth drain is coupled to a power supply which has a voltage level VDD, the fourth gate is coupled to the second source and the third gate, and the fourth source is coupled to the third source; a capacitor, having a first terminal and a second terminal, wherein the first terminal is coupled to the second source, the third gate and the fourth gate, and the second terminal is coupled to the third and the fourth sources; and a light-emitting device, having a positive electrode and a negative electrode, wherein the positive electrode is coupled to the third source, the fourth source and the second terminal of the capacitor.