Pixel driving circuit and driving method therefor, and display panel and display apparatus

Abstract

A pixel driving circuit and a driving method therefor, and a display panel and a display apparatus. The pixel driving circuit comprises a write-in transistor, a driving transistor, a storage capacitor, a coupling capacitor and a light-emitting unit, wherein one electrode of the storage capacitor and a gate electrode of the driving transistor are both electrically connected to a first node; and one electrode of the coupling capacitor is electrically connected to a control voltage end, and the other electrode thereof is electrically connected to the first node, and the coupling capacitor is configured to adjust the voltage of the first node in a light emission phase, such that the voltage of the first node is converted from a first voltage into a second voltage.