Patent ID: 7750552

Claim:
A light-emitting device comprising: at least first, second and third light-emitting elements each including a cathode, a first layer containing a first organic compound, a second layer having a hole injecting property containing a metal oxide and a second organic compound, a light emitting layer in contact with said first layer, and an anode in contact with said second layer, wherein the first light-emitting element emits red light, the second light-emitting element emits green light and the third light-emitting element emits blue light; a first polarizing plate arranged on a front side of the first, second and third light -emitting elements; and a second polarizing plate arranged on a rear side of the first, second and third light-emitting elements, wherein each of the anode and the cathode of the first, second and third light-emitting elements is a light-transmitting conductive film, and wherein the second organic compound includes 4,4′-bis[N-(1-naphthyl)-N -phenyl-amino]-biphenyl.