公开(公告)号：US12147038B2

公开(公告)日：2024-11-19

申请号：US16539818

申请日：2019-08-13

Applicant: Apple Inc.

Inventor： Se Baek Oh ,  Bradley C. Steele ,  Byron R. Cocilovo ,  Francesco Aieta ,  Graham B. Myhre

IPC: G02B27/01 ,  G02B5/08 ,  G02B5/18 ,  G02B5/32 ,  G02B27/09

Abstract: An electronic device may include a display that produce images. The display may generate light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide that propagates the light in a first direction towards the output coupler. The output coupler may couple the light out of the waveguide towards the eye box while inverting a parity of the light about the first direction. The coupler may include a first element such as a set of partial mirrors or diffractive gratings that redirects a first portion of the light in a second direction. The coupler may include a second element that redirects a second portion of the light in a third direction opposite the second direction. The first element may redirect the second portion and the second element may redirect the first portion towards the eye box.

公开(公告)号：US20240310566A1

公开(公告)日：2024-09-19

申请号：US18597862

申请日：2024-03-06

Applicant: Apple Inc.

Inventor： Choon How Gan ,  Adam Backer ,  Ben-Li Sheu ,  Francesco Aieta ,  Ping Qu ,  Se Baek Oh ,  Zhenwen Ding

IPC: F21V8/00 ,  G02B27/01

CPC classification number: G02B6/0016 ,  G02B6/0018 ,  G02B6/0036 ,  G02B27/0172

Abstract: An electronic device may have a waveguide, an input coupler that couples light into the waveguide, and an optical coupler that couples the light out of the waveguide. A medium may be layered onto the waveguide. The input coupler may include a first surface relief grating (SRG) and the optical coupler may include a second SRG in the medium. The first SRG may be a non-binary staircase SRG having ridges with multiple steps. The second SRG may be a binary SRG having troughs that extend to the height of the lowest steps of the first SRG. A reflective layer may fill the first SRG. Forming the input coupler using a staircase SRG may serve to maximize the in-coupling efficiency of the input coupler, thereby maximizing the efficiency with which the light is provided to an eye box.

公开(公告)号：US20200096771A1

公开(公告)日：2020-03-26

申请号：US16539818

申请日：2019-08-13

Applicant: Apple Inc.

Inventor： Se Baek Oh ,  Bradley C. Steele ,  Byron R. Cocilovo ,  Francesco Aieta ,  Graham B. Myhre

IPC: G02B27/01 ,  G02B27/09 ,  G02B5/18 ,  G02B5/32 ,  G02B5/08

Abstract: An electronic device may include a display that produce images. The display may generate light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide that propagates the light in a first direction towards the output coupler. The output coupler may couple the light out of the waveguide towards the eye box while inverting a parity of the light about the first direction. The coupler may include a first element such as a set of partial mirrors or diffractive gratings that redirects a first portion of the light in a second direction. The coupler may include a second element that redirects a second portion of the light in a third direction opposite the second direction. The first element may redirect the second portion and the second element may redirect the first portion towards the eye box.

公开(公告)号：US20200089014A1

公开(公告)日：2020-03-19

申请号：US16546157

申请日：2019-08-20

Applicant: Apple Inc.

Inventor： Guolin Peng ,  Eric J. Hansotte ,  Francesco Aieta ,  Graham B. Myhre ,  Hyungryul Choi ,  Nan Zhu ,  Paul J. Gelsinger-Austin ,  Se Baek Oh ,  Scott M. DeLapp ,  Bradley C. Steele

IPC: G02B27/14 ,  G02B27/12 ,  G02B27/01

Abstract: An electronic device may have a display that emits image light, a waveguide, and an input coupler that couples the image light into the waveguide. Beam splitter structures may be embedded within the waveguide. The beam splitter structures may partially reflect the image light multiple times and may serve to generate replicated beams of light that are coupled out of the waveguide by an output coupler. The beam splitter structures may replicate the beams across two dimensions to provide an eye box with uniform-intensity light from the display across its area. The beam splitter structures may include stacked partially reflective beam splitter layers, sandwiched transparent substrate layers having different indices of refraction, a thick volume hologram interposed between substrate layers, or combinations of these or other structures. The reflectivity of the beam splitter structures may vary discretely or continuously across the lateral area of the waveguide.

公开(公告)号：US20190265486A1

公开(公告)日：2019-08-29

申请号：US16277875

申请日：2019-02-15

Applicant: Apple Inc.

Inventor： Eric J. Hansotte ,  Byron R. Cocilovo ,  Se Baek Oh ,  Seyedeh Mahsa Kamali ,  Francesco Aieta

IPC: G02B27/01 ,  G02B26/10 ,  F21V8/00

Abstract: An electronic device may have a light source such as a laser light source. The light source may emit light into a waveguide. A phase grating may diffract the light that is emitted into the waveguide to produce diffracted light. The diffracted light may be oriented parallel to a surface normal of an angled edge of the waveguide and parallel to a surface normal of a microelectromechanical systems mirror element in a two-dimensional scanning microelectromechanical systems mirror that is coupled to the edge of the waveguide. A wave plate may be interposed between the mirror and the edge of the waveguide to change the polarization state of light reflected from the mirror element relative to incoming diffracted light from the phase grating. The phase grating may be configured so that the reflected light is not diffracted by the phase grating.