公开(公告)号：US20150171373A1

公开(公告)日：2015-06-18

申请号：US14560702

申请日：2014-12-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAKU HIRASAWA ,  YASUHISA INADA ,  AKIRA HASHIYA ,  YOSHITAKA NAKAMURA

IPC: H01L51/52 ,  G02B5/02

CPC classification number: H01L51/5268 ,  G02B5/0252 ,  G02B5/1809 ,  G02B5/1866 ,  G02F1/133606 ,  H01L51/5275

Abstract: An optical sheet includes a light scattering layer that scatters at least a part of light incident thereon by diffraction and that includes first and second areas. Each first area is a projection. Each second area is a recess. Each of at least the projections or the recesses has a tapered shape. When a center wavelength of the light incident on the light scattering layer is λ and a refractive index of a layer that is in contact with the light scattering layer at a light emission side is n, spatial frequency components of a pattern formed by the first and second areas have a maximum peak at a spatial frequency in a range of 0.068/(λ×n) or more and 2.8/(λ×n) or less.

Abstract translation: 光学片包括光散射层，其散射通过衍射入射到其上的光的至少一部分，并且包括第一和第二区域。 每个第一个区域都是一个投影。 每个第二个区域都是一个凹槽。 至少突起或凹部中的每一个具有锥形形状。 当入射到光散射层上的光的中心波长为λ，并且在光出射侧与光散射层接触的层的折射率为n时，由第一和第 第二区域在0.068 /（λ×n）以上且2.8 /（λ×n）以下的范围内的空间频率具有最大峰值。