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1. (WO2017039825) DIFFRACTIVE BACKLIGHT DISPLAY AND SYSTEM

Pub. No.:    WO/2017/039825    International Application No.:    PCT/US2016/040904
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sun Jul 03 01:59:59 CEST 2016
IPC: G02B 27/01
G02B 6/12
G02F 1/1335
Applicants: LEIA INC.
Inventors: FATTAL, David A.
Title: DIFFRACTIVE BACKLIGHT DISPLAY AND SYSTEM
Abstract:
A diffractive backlight system includes a light source and a planar plate light guide. A surface of the plate light guide is configured with a diffraction grating that couples light out of the plate light guide and concentrates the light into a localized region of space. The diffractive backlight system may be used with at least one light-valve array to form a display that generates images for viewing in the localized region of space. The display may be incorporated in head-mounted displays in order to generate focused augmented or virtual reality images for wearers.