Patent ID: 9620740
Date: 2017-04-11
CPC Classifications: H01L,H05B,Y02E

Claim:
1. An organic electroluminescence element, comprising: a moisture-proof substrate being light transmissive; a light emitting stack including a first electrode being light transmissive, a light emitting layer for emitting at least two rays of light with different emission wavelengths, and a second electrode which are arranged in this order from the moisture-proof substrate; and a light outcoupler which is provided on a side of the moisture-proof substrate facing the first electrode and has an uneven structure made of material having a refractive index approximately equal to a refractive index of the moisture-proof substrate or lower than the refractive index of the moisture-proof substrate, the uneven structure including multiple protruded parts having approximately same heights arranged on a plane which is parallel to a surface of the moisture-proof substrate facing the first electrode, the plane being divided into sections having same areas and forming a matrix, the multiple protruded parts being irregularly allocated to the sections of the matrix, and with regard to arbitrary regions each consisting of a predetermined number of the sections of the matrix on the plane, when an area ratio is defined as a ratio of a total area of multiple protruded parts in an arbitrary region to an area of the arbitrary region, and for a given arbitrary region, the area ratio falls within a range of +/−10% deviation from an average of area ratios of all arbitrary regions.