| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminate capable of improving the efficiency of picking up light emitted by the light emitting material in a light emitting element. SOLUTION: The laminate consists of three layers: it has a transparent layer (middle layer) made of a refractive index gradient material whose refractive index decreases continuously in the direction of the thickness of the laminate, between a transparent layer (layer A) made of a material of a refractive index of equal to or more than 1.65 and a transparent layer (layer B) made of a material of a refractive index of equal to or less than 1.60. When the refractive index of the layer-A side of the middle layer is taken as n(A) and that of the layer-B side as n(B), n(A) is higher than n(B). The middle layer has fixed liquid-crystal molecules, and its continuous reduction of the refractive index is due to the orientation of the liquid-crystal molecules. A light emitting element having the laminate and the light emitting material is also provided. COPYRIGHT: (C)2008,JPO&INPIT
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