Pixel driver circuit, display device and pixel driving method

A pixel driver circuit for driving a light-emitting element of a pixel structure, comprising:

• a driving transistor (T1) connected in series to the light-emitting element, a drain electrode of the driving transistor (T1) is connected to a first power source signal input end (VDD);
• a capacitor (C), a first end of the capacitor (C) is connected to a gate electrode of the driving transistor (T1), and a second end of the capacitor (C) is connected to a source electrode of the driving transistor (T1);
• and
• a charging circuit at least including a current source and configured to charge the capacitor (C) at a charging stage,
• wherein within at least a part of time period of the charging stage, an intensity of a charging current for charging the capacitor (C) is greater than an intensity of a target current, and after the charging stage, a voltage difference across the capacitor (C) is equal to a target voltage difference;
• the target voltage difference is a gate-to-source voltage difference of the driving transistor T1 when the light-emitting element emits light at a preset brightness value at a light-emitting stage;
• and
• the target current is a current flowing through the driving transistor T1 when the light-emitting element emits the light at the preset brightness value at the light-emitting stage.