The invention provides a display device, a driving method thereof, and an element substrate that a high image quality can be realized and a deterioration of a light emitting element can be improved. The first transferring assembly and the second transferring assembly are arranged side by side. The holder has a surface facing the heat generator. The active optical fiber is doped with an implant selected from the group of rare earth metals, erbium, ytterbium, and both ytterbium and erbium.