Patent ID: 8552939
Filing Date: 2013-10-08
Classification: G09G

Abstract:
1. A pixel circuit disposed at a part where a scanning line and a signal line intersect each other, said pixel circuit comprising at least: an electrooptic element; a drive transistor; a sampling transistor; a retaining capacitance; said drive transistor having a gate connected to an input node, a source connected to an output node, and a drain connected to a predetermined power supply potential; said electrooptic element having one terminal connected to said output node and another terminal connected to a predetermined potential; said sampling transistor being connected between said input node and said signal line; said retaining capacitance being connected to said input node; said sampling transistor operating when selected by said scanning line, sampling an input signal from said signal line, and retaining the input signal in said retaining capacitance; said drive transistor supplying a driving current to said electrooptic element according to a signal potential retained in said retaining capacitance; and a compensating circuit configured to compensate for a decrease in a magnitude of the driving current that is generated by the drive transistor for a given input signal, the decrease being caused by a secular change of said drive transistor; said compensating circuit including: