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1. WO2020112836 - METHODS AND SYSTEMS FOR HIGH EFFICIENCY EYEPIECE IN AUGMENTED REALITY DEVICES

Publication Number WO/2020/112836
Publication Date 04.06.2020
International Application No. PCT/US2019/063340
International Filing Date 26.11.2019
IPC
G02B 27/00 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/-G02B26/119
G02B 27/02 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/-G02B26/119
02Viewing or reading apparatus
G09G 5/00 2006.01
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
5Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
G09G 5/36 2006.01
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
5Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
36characterised by the display of individual graphic patterns using a bit-mapped memory
H04J 14/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
H04N 5/00 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
CPC
G02B 27/00
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
G02B 27/02
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
02Viewing or reading apparatus
G02F 1/01
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour 
H04J 14/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
H04N 9/31
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
9Details of colour television systems
12Picture reproducers
31Projection devices for colour picture display ; , e.g. using electronic spatial light modulators [ESLM]
Applicants
  • MAGIC LEAP, INC. [US]/[US]
Inventors
  • CHENG, Hui-Chuan
Agents
  • LARGENT, Craig C.
  • KAO, Dah-Bin
Priority Data
62/773,82130.11.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHODS AND SYSTEMS FOR HIGH EFFICIENCY EYEPIECE IN AUGMENTED REALITY DEVICES
(FR) PROCÉDÉS ET SYSTÈMES POUR OCULAIRE À EFFICACITÉ ÉLEVÉE DANS DES DISPOSITIFS DE RÉALITÉ AUGMENTÉE
Abstract
(EN)
A display system includes projection optics configured to project a beam of light in a first direction and an eyepiece unit including a first waveguide layer disposed in a first lateral plane and including an incident light surface and an opposing surface opposite the incident light surface and an incoupling diffractive optical element disposed on the incident light surface. The incoupling diffractive optical element is configured to incouple a first portion of the beam of light and to propagate the first portion of the beam of light by total internal reflection in a second direction and transmit a second portion of the beam of light along the first direction. The eyepiece also includes a retroreflector disposed adjacent the opposing surface. The retroreflector is configured to retroreflect the second portion of the beam of light along a reflected direction opposite to the first direction.
(FR)
L'invention concerne un système d'affichage comprenant une optique de projection configurée pour projeter un faisceau de lumière dans une première direction et une unité d'oculaire comprenant une première couche de guide d'ondes disposée dans un premier plan latéral et comprenant une surface de lumière incidente et une surface opposée à l'opposé de la surface de lumière incidente et un élément optique diffractif de couplage interne disposé sur la surface de lumière incidente. L'élément optique diffractif à couplage interne est configuré pour faire entrer une première partie du faisceau de lumière et pour propager la première partie du faisceau de lumière par réflexion interne totale dans une seconde direction et transmettre une seconde partie du faisceau de lumière le long de la première direction. L'oculaire comprend également un rétroréflecteur disposé adjacent à la surface opposée. Le rétroréflecteur est configuré pour rétroréfléchir la seconde partie du faisceau de lumière le long d'une direction réfléchie opposée à la première direction.
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