An electroluminescent device including a lower substrate; a lower structure; and an upper encapsulation structure, in which the lower structure has a light transmitting region and a substantially opaque display region, the lower structure has an inorganic surface portion, the upper encapsulation structure has an inorganic lower surface in contact with the inorganic surface portion to form an inorganic-inorganic encapsulation contact region, and the electroluminescent device does not have a hole formed through both the lower substrate and the lower structure, a portion of the upper encapsulation structure, the portion being corresponding to the light transmitting region, is not removed, and the portion of the upper encapsulation structure is substantially surrounded by the inorganic-inorganic encapsulation contact region in a plan view.