Patent ID: 8907367

Claim:
A light emission device comprising: an organic electroluminescent element including a first substrate, a functional layer, a first electrode, and a second electrode, the functional layer being disposed over a surface of the first substrate and including light-emitting layer; a wiring board including a second substrate, a first patterned conductor, and a second patterned conductor, the first patterned conductor and the second patterned conductor being disposed on a surface of the second substrate; a first connection part electrically connected to the first electrode and the first patterned conductor; and a second connection part electrically connected to the second electrode and the second patterned conductor, the first electrode and the second electrode including a first extended portion and a second extended portion which extend outside from sides of a light-emitting unit, respectively, the light-emitting unit being an overlap of the first electrode, the functional layer, and the second electrode, the first extended portion and the second extended portion overlapping the first patterned conductor and the second patterned conductor in a thickness direction, respectively, the organic electroluminescent element further including a first through hole and a second through hole, the first through hole penetrating the first extended portion and the first substrate, the second through hole penetrating the second extended portion and the first substrate, the first connection part including a first through-hole wire and a first protrusion electrode, the first through-hole wire having a hollow cylindrical shape and being inside the first through hole, the first protrusion electrode protruding from the first patterned conductor along the thickness direction to be inside the first through-hole wire so as to be electrically connected to the first through-hole wire, the second connection part including a second through-hole wire and a second protrusion electrode, the second through-hole wire having a hollow cylindrical shape and being inside the second through hole, and the second protrusion electrode protruding from the second patterned conductor along the thickness direction to be inside the second through-hole wire so as to be electrically connected to the second through-hole wire.