公开(公告)号：US20150179981A1

公开(公告)日：2015-06-25

申请号：US14638567

申请日：2015-03-04

Applicant: ZEON CORPORATION

Inventor： Hiroyasu INOUE ,  Toshihiko HORI

IPC: H01L51/52

CPC classification number: H01L51/5268 ,  G02B5/045 ,  G02B6/0036 ,  G02F1/133603 ,  G02F2001/133607 ,  H01L51/5237 ,  H01L51/5271 ,  H01L51/5275

Abstract: A surface light source device is provided that has high light extraction efficiency and high mechanical strength and can suppress a change in color tone at different viewing angles. To that end, the surface light source device includes: an organic EL element including a luminescent layer; and a light-emitting surface structure layer that is disposed in contact with one of the surfaces of the organic EL element and defines a concave-convex structure on the surface on the device light-emitting surface side. The concave-convex structure includes a plurality of concave portions having oblique surfaces and flat portions disposed around the concave portions. The surface light source device further includes a diffusing member on which the light emitted from the luminescent layer is incident, the diffusing member allowing the incident light to pass therethrough or reflecting the incident light in a diffused manner.

Abstract translation: 提供具有高光提取效率和高机械强度的表面光源装置，并且可以抑制不同视角下的色调变化。 为此，表面光源装置包括：包含发光层的有机EL元件; 以及与所述有机EL元件的一个表面接触并且在所述器件发光面侧的表面上形成凹凸结构的发光面结构体层。 凹凸结构包括具有倾斜表面的多个凹部和设置在凹部周围的平坦部。 表面光源装置还包括漫射构件，从发光层发射的光入射到该漫射构件，漫射构件允许入射光穿过其中或以漫射方式反射入射光。