Patent ID: 7186468

Claim:
An organic electro-luminescent display device, comprising: a transparent electrode; a counter electrode spaced away from said transparent electrode; a light emitting layer comprising a phosphorescent compound and interposed between said transparent electrode and said counter electrode; and a hole transferring layer interposed between said transparent electrode and said light emitting layer, said hole transferring layer comprising triaryl amine compound represented by the following general formula (1): wherein Ar 1 , Ar 2 , Ar 3 and Ar 4 are individually substituted or unsubstituted aryl group or aromatic heterocyclic group with proviso that a situation where a combination of groups (Ar 1 , Ar 2 ) is identical with a combination of groups (Ar 3 , Ar 4 ) is excluded; A and B may be the same with or different from each other and are individually substituted or unsubstituted aryl group or aromatic heterocyclic group; k and m are respectively an integer; X is a heteroatom; j is an integer of 1 or more; n is an integer of 1 or more; R 1 , R 2 , R 3 and R 4 may be the same with or different from each other and are individually hydrogen atom, straight or branched substituted or unsubstituted alkyl group, alkoxy group or aryl group wherein the alkyl groups or alkoxy groups which are bonded to neighboring carbon atom may be connected together to form a closed ring.