| 摘要 |
PROBLEM TO BE SOLVED: To improve light use efficiency of an organic EL display device. SOLUTION: A pixel electrode PXE is formed on a passivation film PAS, and a first bank BNKA is formed of a first insulating layer in the form of a projection. A slightly raised second-1 bank BNKB-1 is formed of a second insulating layer on the pixel electrode PXE in a B1 area and a B2 area of a pair of the first banks BNKA (an A1 area, an A2 area). Further, a second-2 bank BNKB-2 is formed of the second insulating layer on the second-1 bank BNKB-1. The cross-section of the second-2 bank BNKB-2 is in an inverted trapezoid shape, and the face on the side opposing to the first bank BNKA has an inverse taper on a substrate side. Between the pair of first banks BNKA, functional layers OLE1, OLE3, OLE5 constituting an organic EL light emitting element are formed on the pixel electrode PXE in a C1 area, a C2 area, a C3 area, and an OLE2 and an OLE4 are formed respectively on the second-2 bank BNKB-2 in the B1 area and B2 area. A counter electrode COUNT is formed to cover all these functional layers and to be common to a plurality of pixels. COPYRIGHT: (C)2008,JPO&INPIT
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