Display device and method for driving the same

A display device, comprising:

• an electro-optic element, being a current-driven type, which serves as a display light source;
• a driving transistor for supplying an output current from a current output terminal to the electro-optic element as a driving current for driving the electro-optic element, the output current being controlled by a voltage which is applied between a current control terminal and a reference potential terminal;
• a first switching transistor;
• a second switching transistor;
• and
• a first capacitor,
• the electro-optic element and the driving transistor being disposed in each of a plurality of pixels which are aligned in a matrix manner, and the driving current corresponding to display data supplied from a data wire to the pixel, wherein:
• the driving transistor, the first switching transistor, and the electro-optic element are serially connected, and
• the current control terminal of the driving transistor is connected to a first terminal of the first capacitor, and
• the second switching transistor is provided between the current control terminal and the current output terminal of the driving transistor, and
• the second switching transistor is put in an ON state and the first switching transistor is put in an ON state before a first period, and
• the second switching transistor is put in an ON state and the first switching transistor is put in an OFF state in the first period, and
• the output current of the driving transistor is adjusted in a second period by changing a potential of a second terminal of the first capacitor or a potential of the reference potential terminal of the driving transistor.

A method for driving a display device which includes:

• an electro-optic element, being a current-driven type, which serves as a display light source;
• a driving transistor for supplying an output current from a current output terminal to the electro-optic element as a driving current for driving the electro-optic element, the output current being controlled by a voltage which is applied between a current control terminal and a reference potential terminal;
• a first switching transistor;
• a second switching transistor;
• and
• a first capacitor,
• the electro-optic element and the driving transistor being disposed in each of a plurality of pixels which are aligned in a matrix manner, and the driving current corresponding to display data supplied from a data wire to the pixel, wherein:
• the driving transistor, the first switching transistor, and the electro-optic element are serially connected, and
• the current control terminal of the driving transistor is connected to a first terminal of the first capacitor, and
• the second switching transistor is provided between the current control terminal and the current output terminal of the driving transistor,
• said method comprising the steps of:
• putting the second switching transistor in an ON state and putting the first switching transistor in an OFF state in a first period which starts from or coincides with a time when a potential corresponding to display data of the pixel is supplied from the data wire to the current control terminal of the driving transistor and a corresponding charge is stored in the first capacitor;
• and
• adjusting the output current of the driving transistor by changing a potential of a second terminal of the first capacitor or a potential of the reference potential terminal of the driving transistor in a second period.