Pixel circuit, driving method thereof and display device

A pixel circuit comprising:

• a reset sub-circuit, a compensation sub-circuit, a data writing sub-circuit, a storage capacitor, a driving transistor, a light emitting control sub-circuit and a light emitting sub-circuit;
• wherein,
• the reset sub-circuit is respectively connected with a reset signal terminal, an initialization signal terminal, a reference signal terminal, a first node and a second node, the reset sub-circuit is configured to output an initialization signal from the initialization signal terminal to the first node and to output a reference signal from the reference signal terminal to the second node under the control of a reset signal from the reset signal terminal;
• the compensation sub-circuit is respectively connected with a driving signal terminal, the first node and a third node, the compensation sub-circuit is configured to write a threshold voltage of the driving transistor into the first node under the control of a driving signal from the driving signal terminal;
• the data writing sub-circuit is respectively connected with the driving signal terminal, a data signal terminal, the reference signal terminal, the second node and a second electrode of the driving transistor, for the data writing sub-circuit is configured to output a data signal from the data signal terminal to the second node and to output the reference signal to the second electrode of the driving transistor under the control of the driving signal;
• one end of the storage capacitor is connected with the first node and the other end thereof is connected with the second node for adjusting a potential of the first node according to a potential of the second node;
• a gate of the driving transistor is connected with the first node, a first electrode of the driving transistor is connected with the third node, and the second electrode of the driving transistor is connected with one end of the light emitting sub-circuit for outputting a drive current to the light emitting sub-circuit under the drive of the first node and the third node;
• the light emitting control sub-circuit is respectively connected with an enable signal terminal, a first power terminal, the reference signal terminal, the second node and the third node, for the light emitting control sub-circuit is configured to output the reference signal to the second node and to output a first power signal from the first power terminal to the third node under the control of an enable signal from the enable signal terminal;
• and
• one end of the light emitting sub-circuit is connected with the second electrode of the driving transistor and the other end thereof is connected with a second power terminal for emitting light under the drive of the drive current.