Patent ID: 8497823

Claim:
A semiconductor device comprising a plurality of pixels, each pixel including: a source signal line; a first gate signal line; a second gate signal line; a third gate signal line; a first electric power source line; a second electric power source line; a third electric power source line; an electric current supply line; a first transistor; a second transistor; a third transistor; a fourth transistor; a fifth transistor; a first capacitor; a second capacitor; and a light emitting element, wherein: a gate electrode of the first transistor is electrically connected to the first gate signal line; a first electrode of the first transistor is electrically connected to the source signal line; a second electrode of the first transistor is electrically connected to a first electrode of the first capacitor; a second electrode of the first capacitor is electrically connected to a gate electrode of the second transistor, a first electrode of the second transistor, and a gate electrode of the third transistor; a second electrode of the second transistor is electrically connected to the first electric power source line; a first electrode of the third transistor is electrically connected to the electric current supply line; a second electrode of the third transistor is electrically connected to a first electrode of the light emitting element; a gate electrode of the fourth transistor is electrically connected to the second gate signal line; a first electrode of the fourth transistor is electrically connected to the source signal line or the second electrode of the first transistor; a second electrode of the fourth transistor is electrically connected to the gate electrode of the second transistor, the first electrode of the second transistor, and the gate electrode of the third transistor; a first electrode of the second capacitor is electrically connected to the second electrode of the first transistor; a second electrode of the second capacitor is electrically connected to the second electrode of the third transistor; a gate electrode of the fifth transistor is electrically connected to the third gate signal line; a first electrode of the fifth transistor is electrically connected to the second electrode of the third transistor; the second electric power source line is electrically connected to a second electrode of the light emitting element; the third electric power source line is electrically connected to the second electrode of the fifth transistor; and an electric potential of the third electric power line is lower than an electric potential of the second electric power line.