Display device including display element and transistor

A display device comprising:

• a first display element;
• a second display element;
• a first transistor;
• and
• a second transistor,
• wherein the first display element comprises a first light-emitting layer,
• wherein the first transistor comprises a first semiconductor film, a first gate electrode and a second gate electrode facing each other with the first semiconductor film provided between the first gate electrode and the second gate electrode, and a first source electrode and a first drain electrode over and in contact with the first semiconductor film,
• wherein the second gate electrode is electrically connected to one of the first source electrode and the first drain electrode,
• wherein the one of the first source electrode and the first drain electrode is electrically connected to the first display element,
• wherein the second display element comprises a second light-emitting layer,
• wherein the second transistor comprises a second semiconductor film, a third gate electrode and a fourth gate electrode facing each other with the second semiconductor film provided between the third gate electrode and the fourth gate electrode, and a second source electrode and a second drain electrode over and in contact with the second semiconductor film,
• wherein the fourth gate electrode is electrically connected to the third gate electrode, and
• wherein one of the second source electrode and the second drain electrode is electrically connected to the second display element.