In a pixel circuit composing a digital-driven organic EL display device,
an organic light emitting element which emits light by the supply of
electric current, and two driving transistors for controlling the supply
of electric current to the organic light emitting element are connected
in series. The driving transistor functions as an electric current
adjustment element which adjusts an electric current flowing through the
organic light emitting element. When the electric current flowing through
the organic light emitting element decreases by the degradation of the
organic light emitting element, decrease in temperature and the like, the
driving transistor acts for increasing the electric current.