(1) a product in which energy levels of respective layers of an organic EL laminated structure are specified and light is emitted using tunnel injection (EP-A No. 0390551); (2) a display device using tunnel injection in the same manner as the (1), Example of which is a white light emitting display device (JP-A No. 3-230584); (3) a product including an emitting layer having a bi-layered structure (