| 摘要 |
PROBLEM TO BE SOLVED: To improve efficiency of a light emitting element by arranging a diffraction structure different from a conventional diffraction structure on a light extraction surface side of the light emitting element such as an organic electroluminescent element. SOLUTION: In this structure for extracting light, a slant structural body having a slant structure in which high-refractive-index regions 2 and low-refractive-index regions 3 are repeated at a certain cycle in a one-dimensional direction along a flat plate 1, and the high-refractive-index regions 2 and the low-refractive-index regions 3 are inclined at a certain slant angle with respect to the normal of the flat plate 1 is arranged on a light extraction surface side of a luminescent layer 11 of the light emitting element. COPYRIGHT: (C)2009,JPO&INPIT
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