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：WO2019067100A1

公开(公告)日：2019-04-04

申请号：PCT/US2018/046717

申请日：2018-08-14

Applicant: APPLE INC.

Inventor： DELAPP, Scott, M. ,  COCILOVO, Bryon, R. ,  OH, Se, Baek ,  STEELE, Bradley, C.

IPC: G02B5/32 ,  G03H1/02 ,  F21V8/00 ,  G02B27/01

Abstract: An electronic device 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 and may be coupled out of the waveguide using an output coupler. The input and output couplers may be formed from volume phase holographic gratings. An additional grating may be used to shift light that would otherwise pass above or below the user's field of view towards the viewer. Holographic gratings in the waveguide may have fringes with constant pitch and variable period. The period at a given portion of the grating may be Bragg-matched to maximize diffraction efficiency for light of a given incident angle.

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：EP3602172A1

公开(公告)日：2020-02-05

申请号：EP18730500.8

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