Pixel unit driving circuit having erasing transistor and matching transistor, method driving the same, pixel unit and display apparatus

A pixel unit driving circuit for driving an Organic Light Emitting Diode (OLED), comprising a driving thin film transistor, a matching thin film transistor, a signal-erasing thin film transistor, a charging control unit, a driving control unit and a storage capacitor, wherein:

• a gate of the driving thin film transistor is connected with a first end of the storage capacitor and is connected with a high level output terminal of a driving power supply via the charging control unit, a source thereof is connected with the high level output terminal of the driving power supply, and a drain thereof is connected with an anode of the OLED;
• a gate and a source of the matching thin film transistor are connected with a data line via the charging control unit, and a drain thereof is connected with a second end of the storage capacitor;
• a gate and a source of the signal-erasing thin film transistor are connected with the second end of the storage capacitor;
• a drain of the signal-erasing thin film transistor is connected with the gate and the source of the matching thin film transistor, and is connected with the data line via the charging control unit;
• the second end of the storage capacitor is connected with a low level output terminal of the driving power supply via the driving control unit;
• the driving control unit and a cathode of the OLED are both connected without intervention of any transistor to the low level output terminal of the driving power supply;
• and
• wherein during a period in which the OLED emits light, the driving control unit is configured to supply the second end of the storage capacitor with a voltage output from the low level output terminal of the driving power supply,
• wherein during a charging period, the charging control unit is configured to apply a voltage output from the high level output terminal of the driving power supply to the gate of the driving thin film transistor so as to turn off the driving thin film transistor.