Patent ID: 9379359
Filing Date: 2016-06-28
CPC Classification: H01L

Claim Text:
1. An organic electroluminescence element, comprising: a substrate having a light transmissive property; a light diffusion layer on a surface of the substrate; a light transmissive electrode on a surface of the light diffusion layer; a light reflective electrode paired with the light transmissive electrode; and one or multiple light emitting layers between the light transmissive electrode and the light reflective electrode, the one or multiple light emitting layers including an m-th light emitting layer which is an m-th closest light emitting layer to the light reflective electrode, where m is an integer equal to or more than 1; λ Ø wherein n an average refractive index of a medium filling a space between the light reflective electrode and the m-th light emitting layer being represented by n a distance from the light reflective electrode to the m-th light emitting layer being represented by d at least a first multiple light emitting layer defined as the m-th light emitting layer when m=1 satisfying relations defined by a following expression (2): where l is an integer equal to or more than 0, and wherein: n an incident angle of light reaching the light diffusion layer from the one or more light emitting layers relative to the light diffusion layer is represented by an angle θ; and an absolute value of a color difference Δu‘v’ at the light diffusion layer which is defined as a difference between chromaticity expressed in u‘v’ coordinates of incident light reaching the light diffusion layer at the angle θ satisfying a condition represented by a following expression (3) and chromaticity expressed in u‘v’ coordinates of incident light reaching the light diffusion layer in a frontal direction is equal to or less than 0.1,