A display device comprising: a light emitting element; a power source line; a current source line; a plurality of scan lines; a first switch, a second switch a third switch and a fourth switch each one of the switches controlled independently by a scan line; a first transistor and a second transistor, wherein gate electrodes of the first and second transistors (211, 212) are connected to each other and wherein a first electrode of the first transistor is connected to the power source line and a second electrode of the first transistor is connected to the current source line through the third switch and wherein a first electrode of the second transistor is connected to the power source line through the second switch and to the light emitting element through the fourth switch and a second electrode of the second transistor is connected to the second electrode of the first transistor; a capacitor element with a first electrode connected to the gate electrodes of the first transistor and the second transistor and to the current source line through the first switch and with a second electrode connected to the power source line; means configured for converting a first current input through the first and second transistors to voltage in a current setting operation; and means configured for supplying electric charges held in the capacitor element as a second current to the light emitting element in a light emission operation; wherein the scan lines are configured to a) switch parallel connections of the first and second transistors in the current setting operation by turning off the fourth switch and turning on the first switch, the second switch and the third switch and b) switch series connections of the first and second transistors in the light emission operation by turning off the first switch, the second switch and the third switch and turning on the fourth switch. a light emitting element; a power source line; a current source line; a plurality of scan lines; a first switch, a second switch a third switch and a fourth switch each one of the switches controlled independently by a scan line; a first transistor and a second transistor, wherein gate electrodes of the first and second transistors (211, 212) are connected to each other and wherein a first electrode of the first transistor is connected to the power source line and a second electrode of the first transistor is connected to the current source line through the third switch and wherein a first electrode of the second transistor is connected to the power source line through the second switch and to the light emitting element through the fourth switch and a second electrode of the second transistor is connected to the second electrode of the first transistor; a capacitor element with a first electrode connected to the gate electrodes of the first transistor and the second transistor and to the current source line through the first switch and with a second electrode connected to the power source line; means configured for converting a first current input through the first and second transistors to voltage in a current setting operation; and means configured for supplying electric charges held in the capacitor element as a second current to the light emitting element in a light emission operation; wherein the scan lines are configured to a) switch parallel connections of the first and second transistors in the current setting operation by turning off the fourth switch and turning on the first switch, the second switch and the third switch and b) switch series connections of the first and second transistors in the light emission operation by turning off the first switch, the second switch and the third switch and turning on the fourth switch.