Patent ID: 9728125
Date: 2017-08-08
CPC Classifications: G09G

Claim:
1. An AMOLED pixel circuit, comprising: a first thin film transistor, and a gate of the first thin film transistor is electrically coupled to a scan line, and a source is electrically coupled to a signal line, and a drain is electrically coupled to a source of a third thin film transistor and one end of a capacitor; the third thin film transistor, and a gate of the third thin film transistor is electrically coupled to a control line (Control), and the source is electrically coupled to the drain of the first thin film transistor, and a drain is electrically coupled to a gate of a second thin film transistor; the second thin film transistor, and the gate of the second thin film transistor is electrically coupled to the drain of the third thin film transistor, a source is electrically coupled to a power source line, and a drain is electrically coupled to an anode of an organic light emitting diode; the capacitor, and one end of the capacitor is electrically coupled to the drain of the first thin film transistor, and the other end is electrically coupled to the source of the second thin film transistor; the organic light emitting diode, and the anode of the organic light emitting diode is electrically coupled to the drain of the second thin film transistor, and a cathode is electrically coupled to a common ground electrode; a current measurement circuit, and one end of the current measurement circuit is electrically coupled to the power source line, and the other end is electrically coupled to a signal voltage drive circuit; and the signal voltage drive circuit, and one end of the signal voltage drive circuit is electrically coupled to the current measurement circuit, and the other end is electrically coupled to the signal line, wherein a drive current measurement and a signal voltage correction of the AMOLED pixel circuit are performed once before each frame or after each frame, or are performed once or more in each image display period, or are performed once as starting up, or are performed once for each regular duration; wherein the drive current measurement and the signal voltage correction of the AMOLED pixel circuit are performed row by row.