Patent ID: 8368298

Claim:
A display device comprising: a first substrate having a first surface and a second surface; a second substrate having a first surface and a second surface; a third substrate; a first organic light emitting element, a second organic light emitting element, and a third organic light emitting element over the first surface of the first substrate; and a fourth organic light emitting element over the first surface of the second substrate, wherein each of the first to fourth organic light emitting elements includes a first electrode, a second electrode, and a layer containing an organic compound sandwiched between the first electrode and the second electrode, wherein the first to third organic light emitting elements emit light toward both surfaces of the first substrate, wherein the fourth organic light emitting element emits light toward both surfaces of the second substrate, wherein the first surface of the first substrate faces the second surface of the second substrate, wherein the first surface of the second substrate faces the third substrate, wherein the first, second, and third substrates are light transmitting substrates, wherein a light emitting region of each of the first to third organic light emitting elements is overlapped with a light emitting region of the fourth organic light emitting element, wherein the first organic light emitting element emits red light, wherein the second organic light emitting element emits green light, wherein the third organic light emitting element emits blue light, and wherein the fourth organic light emitting element emits white light.