Patent ID: 8581297

Claim:
An organic EL display unit comprising: a lower electrode provided respectively for a red organic EL device, a green organic EL device, and a blue organic EL device on a substrate; a hole injection layer provided respectively for the red organic EL device, the green organic EL device, and the blue organic EL device on the lower electrode; a hole transport layer made of a polymer material provided respectively for the red organic EL device and the green organic EL device on the hole injection layer; a red light emitting layer made of a polymer material provided on the hole transport layer for the red organic EL device; a green light emitting layer made of a polymer material provided on the hole transport layer for the green organic EL device; a hole transport layer made of a low molecular material provided on the hole injection layer of the blue organic EL device; a blue light emitting layer made of a low molecular material provided on the whole area of the red light emitting layer, the green light emitting layer, and the hole transport layer for the blue organic EL device; and an electron transport layer, an electron injection layer, and an upper electrode sequentially provided on the whole area of the blue light emitting layer, wherein the hole transport layer for the blue organic EL device is formed by an evaporation method and the hole transport layers for the red and green organic EL devices are formed by a coating method or a printing method, and wherein the hole transport layer of the blue organic EL device is made of an organic material expressed by General formula 1 shown in Chemical formula 3: where A1 to A3 in the General formula 1 respectively and independently represent a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group.