公开(公告)号：US20170371086A1

公开(公告)日：2017-12-28

申请号：US15260993

申请日：2016-09-09

Applicant: Apple Inc.

Inventor： Jun Qi ,  Rong Liu ,  Victor H. Yin ,  Shenglin Ye ,  Sudirukkuge Tharanga Jinasundera ,  Nathan K. Gupta

IPC: F21V8/00

CPC classification number: G02B6/0016 ,  G02B6/00 ,  G02B6/0065 ,  G02B6/0068 ,  G02B6/0073

Abstract: A display may have a backlight with a row of light-emitting diodes that emit light into an edge surface of a light guide layer. The light guide layer may have opposing planar surfaces. Light-scattering structures such as light-scattering holes that extend between the planar surfaces may be used to scatter rays of light by refraction and/or diffraction and can thereby homogenize light from the light-emitting diodes. The homogenized light may then be extracted from the light guide layer and may serve as backlight illumination for an array of pixels such as an array of liquid crystal display pixels. Light-scattering structures such as grooves, pits, bumps, and other structures for scattering light from the light-emitting diodes may be formed on the edge surface of the light guide layer to enhance light mixing.