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公开(公告)号：US20240184117A1
公开(公告)日：2024-06-06
申请号：US18440812
申请日：2024-02-13
Applicant: Apple Inc.
Inventor： Scott M. DeLapp , Vikrant Bhakta , Di Hu , Guolin Peng , Darshan R Kasar , John Raff
CPC classification number: G02B27/0172 , G02B6/34 , G02B2027/0174
Abstract: A display system may include a waveguide, an input coupler with a first surface relief grating (SRG), and an output coupler with a second SRG. A display module may produce image light that is coupled into the waveguide by the first SRG. The first SRG may have an input vector non-parallel with respect to a normal axis of the waveguide. The display module may have an optical axis tilted with respect to the input vector by a non-zero angle. A prism may redirect the image light from the module to the first SRG in a direction parallel to the input vector. The module may include lens elements with an optical axis offset with respect to the center of the field of the image light. This may cause the lens elements to output the image light in a direction parallel to the input vector of the first SRG.
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公开(公告)号：US20240103280A1
公开(公告)日：2024-03-28
申请号：US18467459
申请日：2023-09-14
Applicant: Apple Inc.
Inventor： Barbara J. Kruse , Vikrant Bhakta , John Raff , Cameron A. Harder , Nawaf Al-Baghly
IPC: G02B27/01
CPC classification number: G02B27/0172 , G02B2027/0178
Abstract: A display may include a waveguide having an output coupler that couples image light out of the waveguide and towards a lens, which imparts a first power to the image light. A cover layer may have an outer surface with a three-dimensional curvature and an inner surface. A portion of the inner surface overlapping the output coupler may have a different three-dimensional curvature that forms an additional lens in the cover layer that transmits world light to the output coupler. The output coupler may transmit the world light to the lens, which transmits the world and image light to the eye box. The curvature of the portion of the inner surface may impart power to the world light that reverses the first power and/or a power imparted to the world light by the outer surface of the cover layer.
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公开(公告)号：US20240085706A1
公开(公告)日：2024-03-14
申请号：US18514710
申请日：2023-11-20
Applicant: Apple Inc.
Inventor： Vikrant Bhakta , David A. Kalinowski , Hyungryul Choi , Nathanael D. Parkhill , Stanley K. Melax , Byron R. Cocilovo
IPC: G02B27/01
CPC classification number: G02B27/0172 , G02B2027/011 , G02B2027/0125 , G02B2027/0147 , G02B2027/0163
Abstract: An electronic device may include a display module that produces light having an image, a lens that directs the light to a waveguide, and a waveguide that directs the light to an eye box. The lens may produce a foveated image in the light by applying a non-uniform magnification to the image in the light. The non-uniform magnification may vary as a function of angle within a field of view of the lens. This may allow the foveated image to have higher resolution within the central region than in the peripheral region. Performing foveation using the lens maximizes the resolution of images at the eye box without increasing the size of the display module. Control circuitry on the device may apply a pre-distortion to the image that is an inverse of distortion introduced by the lens in producing the foveated image.
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Patent Agency Ranking
公开(公告)号：US11852816B1
公开(公告)日：2023-12-26
申请号：US17373210
申请日：2021-07-12
Applicant: Apple Inc.
Inventor： Scott M. DeLapp , Guolin Peng , Hyungryul Choi , Vikrant Bhakta
CPC classification number: G02B27/0172 , G02B6/0016 , G02B6/0026 , G02B6/0031 , G02B6/34 , G02B2027/0147 , G02B2027/0174 , G02B2027/0178
Abstract: The display may include a display module and a waveguide. The module may produce first light of first wavelengths during first time periods and may produce second light of second wavelengths during second time periods interleaved with the first time periods. Diffractive gratings or a dichroic wedge may redirect the first light into the waveguide at a first angle and may redirect the second light into the waveguide at a second angle separated from the first angle by a separation angle. The separation angle may be equal to half the angle subtended by the projection of a pixel in the module. The first and second time periods may alternate faster than the response of the human eye. This may configure the first and second image light to collectively provide images at an eye box with an increased effective resolution without increasing the space or power consumed by the display module.
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公开(公告)号：US20230324689A1
公开(公告)日：2023-10-12
申请号：US18173579
申请日：2023-02-23
Applicant: Apple Inc.
Inventor： Dmitry S. Sizov , Xiaobin Xin , Hyungryul Choi , Vikrant Bhakta , Fang Ou , Lina He , Sergei Y. Yakovenko , Ranojoy Bose , Paul S. Drzaic
CPC classification number: G02B27/0172 , G02B6/0031 , G02B6/0073 , G02B2027/0112 , G02B2027/0174
Abstract: An electronic device may provide image light to an eye box. The display may include a light source panel that emits the image light. A waveguide may direct the image light towards the eye box. An input coupler may couple the image light into the waveguide and an output coupler may couple the image light out of the waveguide. A color filter may be optically interposed between the light source panel and the output coupler. The color filter may filter the image light using a steep cutoff characteristic. The color filter may allow the image light to exhibit a desired color point while also allowing the light source panel to use light emitters having peak emission wavelengths that maximize the efficiency of the light emitters and thus the power efficiency of the device.
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公开(公告)号：US11740466B1
公开(公告)日：2023-08-29
申请号：US17203368
申请日：2021-03-16
Applicant: Apple Inc.
Inventor： Vikrant Bhakta , Guolin Peng , Hyungryul Choi , Scott M. DeLapp
CPC classification number: G02B27/0172 , G06F3/013 , G02B2027/0187
Abstract: An electronic device may include a display module that generates light and an optical system that redirects the light towards an eye box. The system may include an input coupler that couples the light into the waveguide. The input coupler may include a prism on the waveguide and a scanning mirror. The scanning mirror may receive the light through the waveguide and the prism and may reflect the light into the waveguide through the prism while being rotated over a set of orientations. The scanning mirror may fill a relatively large field of view eye box with a corresponding image frame despite the limited field of view of the image light produced by the display module. The orientation of the scanning mirror may be adjusted based on gaze tracking data.
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公开(公告)号：US20220004005A1
公开(公告)日：2022-01-06
申请号：US17475850
申请日：2021-09-15
Applicant: Apple Inc.
Inventor： Vikrant Bhakta , Guolin Peng , Hyungryul Choi , Scott M. DeLapp
IPC: G02B27/01
Abstract: An electronic device may include an emissive display panel that emits light, a waveguide with an output coupler that directs the light towards an eye box, and an input coupler that couples the light into the waveguide. A lens directs the light towards the input coupler. Optical components optically coupled between the display panel and the lens may provide the image light with a field angle dependent pupil size upon coupling of the image light into the waveguide by the input coupler. This prevents light that would otherwise pass into the waveguide at angles unsuitable for total internal reflection from passing to the lens, thereby mitigating stray light in the system and optimizing contrast in the image light received at the eye box. The optical components may include an array of apertures, an array of microlenses, an array of tapered optical tunnels, or an array of optical fibers.
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公开(公告)号：US20210247610A1
公开(公告)日：2021-08-12
申请号：US17161469
申请日：2021-01-28
Applicant: Apple Inc.
Inventor： Vikrant Bhakta , Byron R. Cocilovo , Guolin Peng , Hyungryul Choi , Scott M. DeLapp , Se Baek Oh
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.
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