Pixel driving circuit and driving method thereof and display apparatus

Abstract

There are disclosed a pixel driving circuit and a driving method thereof and a display apparatus. The pixel driving circuit comprises: a main driving unit () connected to a data line; a main light-emitting device () connected to the main driving unit; an auxiliary driving unit () connected to the main driving unit (); and an auxiliary light-emitting device () connected to the auxiliary driving unit (). Herein, in an acquisition phase, the main driving unit () is configured to discharge through the main light-emitting device (), and the auxiliary driving unit () is configured to discharge through the main light-emitting device (). In a data storage phase, the main driving unit () is configured to store a data voltage; and in a light-emitting phase, the main driving unit () is configured to drive the main light-emitting device () to emit light, and the auxiliary driving unit () is configured to drive the auxiliary light-emitting device () to emit light. Since the auxiliary driving unit () can drive the auxiliary light-emitting device () to emit light in the light-emitting phase, brightness loss of the main light-emitting device () is remedied, so that brightness uniformity and brightness constancy of the display apparatus are raised.