Pixel circuit, driving method thereof and display device

A pixel circuit, comprising:

• a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a first storage capacitor, a second storage capacitor, and a light-emitting element,
• wherein a gate electrode of the first transistor is coupled to a first electrode of the third transistor, a first electrode of the first transistor is coupled to a second electrode of the fifth transistor, and a second electrode of the first transistor is coupled to a first voltage;
• a gate electrode of the second transistor is coupled to a first control line, a first electrode of the second transistor is coupled to a second electrode of the fourth transistor, and a second electrode of the second transistor is coupled to the second electrode of the fifth transistor;
• a gate electrode of the third transistor is coupled to the first control line, the first electrode of the third transistor is coupled to one end of the first storage capacitor, and a second electrode of the third transistor is coupled to a variable voltage;
• a gate electrode of the fourth transistor is coupled to a second control line, and a first electrode of the fourth transistor is coupled to a data line;
• a gate electrode of the fifth transistor is coupled to a light emission control line, and a first electrode of the fifth transistor is coupled to an anode of the light-emitting element;
• one end of the second storage capacitor is coupled to the other end of the first storage capacitor, and the other end of the second storage capacitor is coupled to the variable voltage;
• and
• a cathode of the light-emitting element is coupled to a second voltage.