公开(公告)号：US20240103273A1

公开(公告)日：2024-03-28

申请号：US18262902

申请日：2022-02-04

Applicant: Apple Inc.

Inventor： Francesco Aieta ,  Byron R. Cocilovo ,  Jonathan B. Pfeiffer ,  Se Baek Oh

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

CPC classification number: G02B27/0172 ,  G02B5/32 ,  G02B6/0016 ,  G02B6/0036 ,  G02B27/0093 ,  G02B2027/0138

Abstract: A display may include a waveguide. An input coupler may couple image light into the waveguide and an output coupler may couple the image light out of the waveguide. A surface relief grating on the waveguide may couple infrared light into the waveguide and may couple the infrared light out of the waveguide. The surface relief grating may additionally or alternatively couple reflected infrared light into the waveguide and out of the waveguide and towards an infrared sensor. The surface relief grating may also form a cross-coupler for the image light. The infrared sensor may gather infrared sensor data based on the reflected infrared light. Control circuitry may perform gaze tracking operations based on the infrared sensor data. The input and output couplers may also be formed from surface relief gratings or may include other optical components.

公开(公告)号：US20230314796A1

公开(公告)日：2023-10-05

申请号：US18153901

申请日：2023-01-12

Applicant: Apple Inc.

Inventor： Friso Schlottau ,  Byron R. Cocilovo ,  Jonathan B. Pfeiffer

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

CPC classification number: G02B27/0081 ,  G02B6/0016 ,  G02B27/0172 ,  G02B2027/0174 ,  G02B2207/123

Abstract: The display may include a waveguide that directs light towards an eye box. The waveguide may include first and second media layers that are edge-coupled at an interface. The first media layer may include a louvered mirror cross-coupler that redirects the light towards the second media layer. The second media layer may include a volume hologram output coupler that couples the light out of the waveguide. Additional layers may be interposed between the first media layer and waveguide substrates. The additional layers may help confine the light within the first media layer as the light propagates such that all of the light enters the second media layer through the interface. This may configure the waveguide to occupy a minimal amount of space within the display while also providing the eye box with as bright and uniform an image as possible.

公开(公告)号：US20220066204A1

公开(公告)日：2022-03-03

申请号：US17423196

申请日：2020-05-26

Applicant: Apple Inc.

Inventor： Jonathan B. Pfeiffer ,  Francesco Aieta ,  Se Baek Oh ,  Friso Schlottau ,  Adam C. Urness

IPC: G02B27/00 ,  G02B5/18 ,  G02B5/32 ,  G02B27/01 ,  F21V8/00

Abstract: An electronic device may include a display that generates light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide, a non-diffractive input coupler, a cross coupler, and an output coupler. The cross coupler may expand the light in a first direction. The cross coupler may perform an even number of diffractions on the light and may couple the light back into the waveguide at an angle suitable for total internal reflection. The output coupler may expand the light in a second direction while coupling the light out of the waveguide. The cross coupler may include surface relief gratings or holographic gratings embedded within the waveguide or formed in a separate substrate. The optical system may direct the light towards the eye box without chromatic dispersion and while supporting an expanded field of view and optical bandwidth.