Patent ID: 8841833

Claim:
An organic electroluminescent (EL) display comprising: lower electrodes arranged on a substrate corresponding to a red organic EL element, a green organic EL element and a blue organic EL element, respectively; hole injection/transport layers corresponding to the red organic EL element, the green organic EL element and the blue organic EL element, respectively, over the lower electrodes using a coating method, each hole injection/transport layer having one or both of hole injection properties and hole transport properties; a red light-emitting layer over the hole injection/transport layer corresponding to the red organic EL element; a green light-emitting layer over the hole injection/transport layer corresponding to the green organic EL element; a blue light-emitting layer on surfaces of the red light-emitting layer, the green light-emitting layer and the hole injection/transport layer corresponding to the blue organic EL element; and an electron injection/transport layer and an upper electrode over a surface of the blue light-emitting layer, wherein, the hole injection/transport layers corresponding to the red organic EL element and the green organic EL element are made of a high-molecular material, and the hole transport layers corresponding to the blue organic EL element (i) include a layer having a hole injection properties and a layer having hole transport properties, and (ii) are made of a low-molecular material.