公开(公告)号：WO2020205101A1

公开(公告)日：2020-10-08

申请号：PCT/US2020/020064

申请日：2020-02-27

Applicant: APPLE INC.

Inventor： DELAPP, Scott, M. ,  BHAKTA, Vikrant ,  CHOI, Hyungryul

IPC: G02B27/01

Abstract: An electronic device may include a light source that emits light, A holographic angular filter may transmit a first portion of the light while diffracting a second portion of the light towards a light sink. A prism may receive the first portion and may direct the first portion towards a spatial light modulator. The spatial light modulator may reflect the first portion towards projection optics as image light. The projection optics may direct the image light towards an eye box. The first portion may be incident upon the prism at relatively low incident angles. The second portion may be incident upon the prism at relatively high incident angles. The holographic angular filter may mitigate propagation of stray light into the projection optics, thereby maximizing a contrast ratio of the image light at the eye box while occupying less volume within the device than other light baffling techniques.

公开(公告)号：WO2018164914A3

公开(公告)日：2018-09-13

申请号：PCT/US2018/020311

申请日：2018-02-28

Applicant: APPLE INC.

Inventor： CHOI, Hyungryul ,  HANSOTTE, Eric J. ,  PENG, Guolin

IPC: G02B6/34 ,  G02B27/01

Abstract: An electronic device such as a head-mounted display may have a display system that produces images. The display system may have one or more pixel arrays (26-1, 26-2) such as liquid-crystal-on-silicon pixel arrays. Images from the display system may be coupled into a waveguide (116) by an input coupler system (114X, 114Y) and may be coupled out of the waveguide in multiple image planes using an output coupler system (120X, 120Y). The input and output coupler systems may include single couplers, stacks of couplers, and tiled arrays of couplers. Multiplexing techniques such as wavelength multiplexing, polarization multiplexing, time-division multiplexing, multiplexing with image light having different ranges of angular orientations, and/or tunable lens techniques may be used to present images to a user in multiple image planes.

公开(公告)号：WO2018226367A1

公开(公告)日：2018-12-13

申请号：PCT/US2018/032445

申请日：2018-05-11

Applicant: APPLE INC.

Inventor： PENG, Guolin ,  CHOI, Hyungryul ,  DELAPP, Scott, M. ,  ANDERSON, Tyler, G.

IPC: G02B27/01 ,  F21V8/00

Abstract: An electronic device may have a pixel array. A light source may illuminate the pixel array to produce image light. The image light may pass through a multi-element lens and may be coupled into a waveguide using an input coupler such as a prism. An output coupler such as a diffraction grating may couple the image light out of the waveguide and towards a user. The user may view the image light and may observe real-world objects through the waveguide. The waveguide may have locally modified portions that define an aperture stop at a distance from an exit surface of the multi-element lens. The multi-element lens may have first and second achromatic doublets and first and second singlets between the first and second achromatic doublets. The lens elements of the multi-element lens may include lens elements with aspheric surfaces.

公开(公告)号：EP3593183A2

公开(公告)日：2020-01-15

申请号：EP18712313.8

申请日：2018-02-28

Applicant: Apple Inc.

Inventor： CHOI, Hyungryul ,  HANSOTTE, Eric J. ,  PENG, Guolin

IPC: G02B6/34 ,  G02B27/01

公开(公告)号：EP3420395A1

公开(公告)日：2019-01-02

申请号：EP17731027.3

申请日：2017-06-06

Applicant: Apple Inc.

Inventor： MYHRE, Graham B. ,  HANSOTTE, Eric J. ,  PENG, Guolin ,  CHOI, Hyungryul ,  OH, Se Baek ,  GELSINGER-AUSTIN, Paul

IPC: G02B27/01

公开(公告)号：WO2018231595A1

公开(公告)日：2018-12-20

申请号：PCT/US2018/036143

申请日：2018-06-05

Applicant: APPLE INC.

Inventor： CHOI, Hyungryul ,  HANSOTTE, Eric, J. ,  PENG, Guolin ,  GELSINGER-AUSTIN, Paul, J. ,  OH, Se, Baek

IPC: G02B27/01

Abstract: An electronic device may have a reflective display with a pixel array that generates images. The reflective display may be illuminated by an illumination system. Light from the illumination system may be reflected by the pixel array as image light. The image light may be provided to a viewer using a waveguide with diffractive input and output couplers. The illumination system may have a waveguide. The illumination system may also have a light source such as one or more light-emitting diodes. Light from the light source may be coupled into the waveguide of the illumination system by a diffractive coupler such as volume hologram that serves as an input coupler. Light from the light source may be routed to the display to illuminate the display using the waveguide in the illumination system and a diffractive coupler such as a volume hologram that serves as an output coupler.

公开(公告)号：WO2018164914A2

公开(公告)日：2018-09-13

申请号：PCT/US2018/020311

申请日：2018-02-28

Applicant: APPLE INC.

Inventor： CHOI, Hyungryul ,  HANSOTTE, Eric J. ,  PENG, Guolin

IPC: G02B6/34 ,  G02B27/01

Abstract: An electronic device such as a head-mounted display may have a display system that produces images. The display system may have one or more pixel arrays such as liquid- crystal-on-silicon pixel arrays. Images from the display system may be coupled into a waveguide by an input coupler system and may be coupled out of the waveguide in multiple image planes using an output coupler system. The input and output coupler systems may include single couplers, stacks of couplers, and tiled arrays of couplers. Multiplexing techniques such as wavelength multiplexing, polarization multiplexing, time-division multiplexing, multiplexing with image light having different ranges of angular orientations, and/or tunable lens techniques may be used to present images to a user in multiple image planes.

公开(公告)号：EP3938835A2

公开(公告)日：2022-01-19

申请号：EP20780864.3

申请日：2020-09-14

Applicant: Apple Inc.

Inventor： BHAKTA, Vikrant ,  PENG, Guolin ,  CHOI, Hyungryul ,  KEILBACH, Kevin A. ,  DELAPP, Scott M.

IPC: G02B27/01 ,  F21V8/00 ,  G02B6/34

公开(公告)号：WO2021158566A2

公开(公告)日：2021-08-12

申请号：PCT/US2021/016248

申请日：2021-02-02

Applicant: APPLE INC.

Inventor： BHAKTA, Vikrant ,  COCILOVO, Byron R. ,  PENG, Guolin ,  CHOI, Hyungryul ,  DELAPP, Scott M. ,  OH, Se Baek

IPC: G02B27/01 ,  G02B5/20 ,  G02B2027/012 ,  G02B2027/0174 ,  G02B27/0172 ,  G02B5/203 ,  G02B5/22 ,  G02B5/26 ,  G02B5/32 ,  G02B6/0016 ,  G02B6/0023 ,  G02B6/0026 ,  G02B6/0035

Abstract: An electronic device may include an emissive display panel that emits light. The light may propagate along an optical path extending to an eye box. A waveguide with an input, coupler and an output coupler may be interposed on the optical path. An angle-selective transmission filter (ASTF) may be interposed on the optical path and may filter the emitted light as a function of angle to remove high-angle light from the optical path before the light is provided to the output coupler. The ASTF may include diffractive grating structures such as thin-film holograms, volume holograms, or surface, relief gratings, louvered mirrors, multi-layer coatings, or a pinhole array. This ASTF may serve to minimize stray light within the display, thereby optimizing the contrast and the modulation transfer function (MTF) of the display.

公开(公告)号：WO2020005507A1

公开(公告)日：2020-01-02

申请号：PCT/US2019/036168

申请日：2019-06-07

Applicant: APPLE INC.

Inventor： BHAKTA, Vikrant ,  CHOI, Hyungryul ,  PENG, Guolin ,  DELAPP, Scott M.

IPC: G02B27/01 ,  G02B19/00 ,  G02B27/10 ,  G02B26/08

Abstract: An electronic device may have a spatial light modulator. Control circuitry in the electronic device may use the spatial light modulator to generate images. A light source may be used to produce illumination for the spatial light modulator. An optical system may direct the illumination onto the spatial light modulator and may direct corresponding reflected image light towards eye boxes for viewing by a user. Head-mounted support structures may be used to support the spatial light modulator, light source, and optical system. The light source may include light-emitting elements such as light-emitting diodes or lasers. Multiple light-emitting elements may be provided in the light source in a one-dimensional or two- dimensional array. During operation, the control circuitry can individually adjust the light- emitting elements.