Pixel circuit and driving method thereof, display device

A pixel circuit, comprising:

• a drive transistor;
• a first energy storage element;
• and a driving module;
• and having a reset voltage input terminal, a data voltage input terminal;
• a working voltage input terminal;
• and a plurality of control signal input terminals;
• wherein,
• a source of the drive transistor is connected with a first end of the first energy storage element;
• the driving module is connected with a first end of the first energy storage element, a second end of the first energy storage element, a gate of the drive transistor, the reset voltage input terminal, the data voltage input terminal and the working voltage input terminal, and connects the plurality of control signal input terminals;
• the driving module has a first node, when the first node and the second end of the first energy storage element are both floated, a voltage difference between the first node and the first end of the first energy storage element is kept constant;
• the driving module connects the working voltage input terminal with the first end of the first energy storage element when a first control signal input terminal is inputted with a signal having an effective level;
• connects the first node with the reset voltage input terminal when a second control signal input terminal is inputted with a signal having an effective level;
• connects the data voltage input terminal with the gate of the drive transistor and the second end of the first energy storage element when a third control signal input terminal is inputted with a signal having an effective level;
• and connects the first node with the gate of the drive transistor when a fourth control signal input terminal is inputted with a signal having an effective level.