LIGHT EMITTING DEVICE

• Main Author: MATSUZAKI JUNPEI
• Format: Patent
• Language: English; Japanese
• Published: 12.01.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

PROBLEM TO BE SOLVED: To provide a light emitting device that scatters light in the light emission device and further reduces attenuation of light in the light emission device to thereby enhance the light extraction efficiency.SOLUTION: A light emitting device includes a light emitting element 1a, a light scattering layer 2a, and a light transmitting layer 3a. The light emitting device further comprises a refractive index adjusting layer 4a. The light emitting element 1a, the light scattering layer 2a, the refractive index adjusting layer 4a, and the light transmitting layer 3a are stacked in this order. The light scattering layer 2a is configured to scatter light reaching the light scattering layer 2a. The light transmitting layer 3a has optical transparency. The refractive index adjusting layer 4a has optical transparency and has a refractive index which is higher than the refractive index of the light scattering layer 2a and lower than the refractive index of the light transmitting layer 3a.SELECTED DRAWING: Figure 1 【課題】発光デバイス内で光を散乱させた上で、更に発光デバイス内での光の減衰を低減することで、光の取り出し効率が向上した発光デバイスを提供する。【解決手段】発光デバイスは、発光素子１ａと、光散乱層２ａと、光透過層３ａとを備える。発光デバイスは、屈折率調整層４ａを更に備える。発光素子１ａ、光散乱層２ａ、屈折率調整層４ａ、及び光透過層３ａが、この順番に積層している。光散乱層２ａは、光散乱層２ａに到達する光を散乱させるように構成されている。光透過層３ａは、光透過性を有する。屈折率調整層４ａは、光透過性を有し、且つ光散乱層２ａの屈折率よりも高いと共に光透過層３ａの屈折率よりも低い屈折率を有する。【選択図】図１