公开(公告)号：US12066631B2

公开(公告)日：2024-08-20

申请号：US18096910

申请日：2023-01-13

Applicant: GOOGLE LLC

Inventor： Thomas Hoekman ,  Joseph Daniel Lowney ,  Alexander Y. Zhu

IPC: G02B27/44 ,  G02B27/01 ,  G02B27/28 ,  G02B5/20

CPC classification number: G02B27/0172 ,  G02B27/288 ,  G02B27/44 ,  G02B5/203 ,  G02B2027/0178

Abstract: Techniques are described in which a view control layer is optically coupled to a waveguide having one or more diffraction structures. The view control layer selectively prevents light rays from interfacing with at least one diffraction structure of the waveguide based on a respective angle of incidence at which the light rays encounter the view control layer. In various embodiments, the view control layer may include a light control film, a polarization stack, and/or a dielectric stack angular filter.

公开(公告)号：US20250155632A1

公开(公告)日：2025-05-15

申请号：US18505223

申请日：2023-11-09

Applicant: GOOGLE LLC

Inventor： Thomas Hoekman

IPC: F21V8/00 ,  G02B5/18

Abstract: Waveguide modification includes modifying waveguide combiners, output coupler, and pupil expander regions, which contain diffraction gratings, based on user and display characteristics during manufacturing. The diffraction grating is generally configured to combine received display light, representing an image for display, and directs the combined light to a location where the image can be comfortably viewed by the user. Because the desired location for the display can vary based on characteristics of the user, the diffraction grating is modified during manufacturing, such as by covering portions of the grating, to tailor the characteristics of the diffraction grating for a particular user or group of users.

公开(公告)号：US20250147311A1

公开(公告)日：2025-05-08

申请号：US18502760

申请日：2023-11-06

Applicant: GOOGLE LLC

Inventor： Thomas Hoekman

IPC: G02B27/01 ,  G02B6/34

Abstract: One or more diffractive gratings of a waveguide introduce a phase perturbation to offset a lateral color misalignment due to surface deformations such as non-parallelism of the major surfaces of the waveguide. In some embodiments, a pitch and/or angle of the diffractive grating is tuned to change the k-vector of the grating in the direction of a change in total thickness variation (TTV) across the waveguide.

公开(公告)号：US20240241374A1

公开(公告)日：2024-07-18

申请号：US18096910

申请日：2023-01-13

Applicant: GOOGLE LLC

Inventor： Thomas Hoekman ,  Joseph Daniel Lowney ,  Alexander Y. Zhu

IPC: G02B27/01 ,  G02B27/28 ,  G02B27/44

CPC classification number: G02B27/0172 ,  G02B27/288 ,  G02B27/44 ,  G02B5/203 ,  G02B2027/0178

Abstract: Techniques are described in which a view control layer is optically coupled to a waveguide having one or more diffraction structures. The view control layer selectively prevents light rays from interfacing with at least one diffraction structure of the waveguide based on a respective angle of incidence at which the light rays encounter the view control layer. In various embodiments, the view control layer may include a light control film, a polarization stack, and/or a dielectric stack angular filter.