Pixel circuit, method for driving the same, array substrate, display device

A pixel circuit comprising a first switching transistor, a storage capacitor, a driving transistor, a light emitting device and a threshold compensating circuit;

• wherein
• the threshold compensating circuit comprises a second switching transistor, a third switching transistor, a fourth switching transistor and a coupling capacitor;
• a gate of the first switching transistor is configured to receive a first scan signal, a second electrode of the first switching transistor is connected to a data signal input terminal, and a third electrode of the first switching transistor is connected to a first terminal of the storage capacitor, a first terminal of the coupling capacitor and a second electrode of the second switching transistor;
• a second terminal of the storage capacitor is configured to receive a power supply voltage and is connected to a second electrode of the driving transistor;
• a gate of the second switching transistor is configured to receive a second scan signal and is connected to a gate of the third switching transistor, and a third electrode of the second switching transistor is connected to a negative terminal of a power supply;
• a second electrode of the third switching transistor is connected to a gate of the driving transistor, and a third electrode of the third switching transistor is connected to a third electrode of the driving transistor and a second electrode of the fourth switching transistor;
• a gate of the fourth switching transistor is configured to receive a first control signal, and a third electrode of the fourth switching transistor is connected to the light emitting device;
• and
• a second terminal of the coupling capacitor is connected to the gate of the driving transistor.