公开(公告)号：US11125929B2

公开(公告)日：2021-09-21

申请号：US16463078

申请日：2018-01-08

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Tao Liu ,  Brian W. Ostlie ,  Brent A. Hedding ,  Charlie C. Ho ,  Yongshang Lu ,  Jay M. Jennen ,  David C. Mercord ,  Johnnie L. Williams

IPC: F21V8/00

Abstract: A display system including a lightguide and first and second reflective layers disposed on opposite sides of the lightguide is provided. The lightguide has opposing first and second major surfaces and includes a light extraction pattern for extracting light that would otherwise be confined and propagate within the lightguide primarily by total internal reflection. Light extracted by the light extraction pattern exits the lightguide through at least one of the first and second major surfaces of the lightguide. Each of the first and second reflective layers has an average specular reflectance of at least 50% in a predetermined wavelength range. The light extraction pattern may be repeatedly imaged by the first and second reflective layers to produce three-dimensional stacked images of the light extraction pattern.