Method for driving pixel circuit

A method for driving a pixel circuit,

• wherein the pixel circuit comprises a switching thin film transistor, a driving thin film transistor, a controlling thin film transistor, a storage capacitor, and an organic light emitting diode,
• wherein, a gate of the switching thin film transistor is configured to input a scanning signal, a source thereof is configured to input a data signal, and a drain thereof is connected to a gate of the driving thin film transistor;
• wherein, a source of the driving thin film transistor is configured to input a first driving voltage, and a drain thereof is connected to a drain of the controlling thin film transistor and an anode of the organic light emitting diode;
• wherein, a gate of the controlling thin film transistor is configured to input a control signal, and a source thereof is configured to input an enable signal;
• and
• wherein, a first end of the storage capacitor is connected to the gate of the driving thin film transistor, and a second end thereof is connected to the drain of the driving thin film transistor;
• and
• wherein a cathode of the organic light emitting diode is connected to a second driving voltage;
• and
• wherein the method comprises steps of:
• applying a scanning signal, a data signal, a control signal, an enable signal, a first driving voltage, and a second driving voltage to the pixel circuit, and obtaining an actual threshold voltage and an actual current-to-voltage conversion factor of the driving thin film transistor, and actual luminous efficiency of the organic light emitting diode in sequence;
• and
• calculating a compensation data signal inputted to the source of the switching thin film transistor, based on the obtained actual threshold voltage and actual current-to-voltage conversion factor of the driving thin film transistor and actual luminous efficiency of the organic light emitting diode, so as to compensate a threshold voltage and a current-to-voltage conversion factor of the driving thin film transistor, and luminous efficiency of the organic light emitting diode.