Patent ID: 8624807

Claim:
A driving method of a light emitting device comprising a current supply line, a scan line electrically connected to a first selection circuit where a signal is input and to a second selection circuit, a light emitting element electrically connected to the current supply line, a first transistor driving the light emitting element and a second transistor controlling the first transistor, comprising the steps of: allowing the light emitting element to emit light by applying a forward bias voltage to the light emitting element during a first period; erasing data that has been written during the first period in a second period; applying a reverse bias voltage to the light emitting element during a third period after the second period; and applying a forward bias voltage to the light emitting element during a fourth period after the third period, wherein a gate electrode of the first transistor is kept in a non-floating state and the first transistor is kept in an off state at least at a time of starting the fourth period, wherein the second transistor is electrically connected to the scan line, wherein the signal has a first potential and a second potential lower than the first potential, and wherein a first time length in which the first potential is supplied is equal to a second time length in which the second potential is supplied.