公开(公告)号：US20230341692A1

公开(公告)日：2023-10-26

申请号：US18319745

申请日：2023-05-18

Applicant: Magic Leap, Inc.

Inventor： Jeffrey Dean SCHMULEN ,  Neal Paul RICKS ,  Samarth BHARGAVA ,  Kevin MESSER ,  Victor Kai LIU ,  Matthew Grant DIXON ,  Xiaopei DENG ,  Marlon Edward MENEZES ,  Shuqiang YANG ,  Vikramjit SINGH ,  Kang LUO ,  Frank Y. XU

IPC: G02B27/01 ,  G02B27/42 ,  F21V8/00 ,  G02B27/10 ,  G02B6/26 ,  G06T19/00

CPC classification number: G02B27/0172 ,  G02B6/0026 ,  G02B6/26 ,  G02B27/1046 ,  G02B27/4233 ,  G06T19/006 ,  G02B6/10

Abstract: Display devices include waveguides with in-coupling optical elements that mitigate re-bounce of in-coupled light to improve overall in-coupling efficiency and/or uniformity. A waveguide receives light from a light source and/or projection optics and includes an in-coupling optical element that in-couples the received light to propagate by total internal reflection in a propagation direction within the waveguide. Once in-coupled into the waveguide the light may undergo re-bounce, in which the light reflects off a waveguide surface and, after the reflection, strikes the in-coupling optical element. Upon striking the in-coupling optical element, the light may be partially absorbed and/or out-coupled by the optical element, thereby effectively reducing the amount of in-coupled light propagating through the waveguide. The in-coupling optical element can be truncated or have reduced diffraction efficiency along the propagation direction to reduce the occurrence of light loss due to re-bounce of in-coupled light, resulting in less in-coupled light being prematurely out-coupled and/or absorbed during subsequent interactions with the in-coupling optical element.

公开(公告)号：US20250085553A1

公开(公告)日：2025-03-13

申请号：US18954311

申请日：2024-11-20

Applicant: Magic Leap, Inc.

Inventor： Jeffrey Dean SCHMULEN ,  Neal Paul RICKS ,  Samarth BHARGAVA ,  Kevin MESSER ,  Victor Kai LIU ,  Matthew Grant DIXON ,  Xiaopei DENG ,  Marlon Edward MENEZES ,  Shuqiang YANG ,  Vikramjit SINGH ,  Kang LUO ,  Frank Y. XU

IPC: G02B27/01 ,  F21V8/00 ,  G02B6/10 ,  G02B6/26 ,  G02B27/10 ,  G02B27/42 ,  G06T19/00

Abstract: Display devices include waveguides with in-coupling optical elements that mitigate re-bounce of in-coupled light to improve in-coupling efficiency and/or uniformity. A waveguide receives light from a light source and includes an in-coupling optical element that in-couples the received light to propagate by total internal reflection within the waveguide. The in-coupled light may undergo re-bounce, in which the light reflects off a waveguide surface and, after the reflection, strikes the in-coupling optical element. Upon striking the in-coupling optical element, the light may be partially absorbed and/or out-coupled by the optical element, thereby reducing the amount of in-coupled light propagating through the waveguide. The in-coupling optical element can be truncated or have reduced diffraction efficiency along the propagation direction to reduce the occurrence of light loss due to re-bounce of in-coupled light, resulting in less in-coupled light being prematurely out-coupled and/or absorbed during subsequent interactions with the in-coupling optical element.