Patent ID: 8049418
Filing Date: 2011-11-01
Classification: H01L,Y10S

Abstract:
1. A light emitting device comprising: a substrate; a first EL element formed over the substrate for emitting a light of a first color, the first EL element including: a first pixel electrode; and a first EL layer comprising a first triplet compound; a second EL element formed over the substrate for emitting a light of a second color which is different from the first color, the second EL element including; a second pixel electrode; and a second EL layer comprising a second triplet compound; a third EL element formed over the substrate for emitting a light of a third color which is different from the first and second colors, the third EL element including: a third pixel electrode; and a third EL layer comprising a third triplet compound over the substrate and a bank over the substrate, the bank covering an edge portion of the first pixel electrode, wherein the first EL layer overlaps with the first pixel electrode with at least a part of the bank interposed therebetween, and wherein at least one of the first, second, and third EL layers comprises a plurality of hole transporting layers.