Patent ID: 8059066
Filing Date: 2011-11-15
Classification: G09G

Abstract:
1. A current-driven pixel circuit which controls a current for an organic electroluminescence element based on a current data signal, the pixel circuit comprising: a driver transistor which supplies a current corresponding to a gate voltage of the driver transistor to the organic electroluminescence element; and a capacitance transistor having a gate connected to a gate of the driver transistor and a drain or a source connected to a control line, a storage capacitor which stores the gate voltage of the driver transistor and which is connected to the gate of the capacitance transistor; wherein a voltage corresponding to a current data signal is set to the gate of the driver transistor while the capacitance transistor is at an OFF state and then a voltage on the control line is changed to switch the capacitance transistor on, so that the gate voltage of the driver transistor is shifted by charges accumulated in a capacitance generated in the capacitance transistor to reduce a current supplied to the organic electroluminescence element when the capacitance transistor is switched on.