A pixel circuit of a display apparatus includes a driving transistor including a gate electrode coupled with a gate node, a drain electrode coupled with a high level pixel power source, and a source electrode coupled with a source node; a light emitting device coupled with the source node and coupled with a low level pixel power source; a first transistor turned on based on a first scan signal; a second transistor turned on based on a second scan signal; a first capacitor coupled between the gate node and the source node; a second capacitor coupled with the source node at one electrode thereof; a third transistor turned on based on a third scan signal to couple the gate node with the other electrode of the second capacitor; and a fourth transistor turned on based on a fourth scan signal to apply a data voltage to the gate node.