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公开(公告)号：US20200310121A1
公开(公告)日：2020-10-01
申请号：US16488806
申请日：2018-02-28
Applicant: Apple Inc.
Inventor： Hyungryul Choi , Eric J. Hansotte , Guolin Peng
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.
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公开(公告)号：US20200004020A1
公开(公告)日：2020-01-02
申请号：US16409681
申请日：2019-05-10
Applicant: Apple Inc.
Inventor： Vikrant Bhakta , Hyungryul Choi , Guolin Peng , Scott M. DeLapp
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.
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公开(公告)号：US20240302664A1
公开(公告)日：2024-09-12
申请号：US18670007
申请日：2024-05-21
Applicant: Apple Inc.
Inventor： Graham B. Myhre , Eric J. Hansotte , Guolin Peng , Hyungryul Choi , Se Baek Oh , Paul Gelsinger-Austin
IPC: G02B27/01
CPC classification number: G02B27/0172 , G02B6/0023 , G02B6/0035 , G02B2027/0123 , G02B2027/0174 , G02B2027/0178
Abstract: An electronic device may include a display system for presenting images close to a user's eyes. The display system may include a display unit that directs light and an optical system that redirects the light from the display unit towards a user's eyes. The optical system may include an input coupler and an output coupler formed on a waveguide. The input coupler may redirect light from the display unit so that it propagates in the waveguide towards the output coupler. The output coupler may redirect the light from the input coupler so that it exits the waveguide towards the user's eyes. A light-redirecting element may be used to redirect edge light that would otherwise be outside of the user's field of view towards the user's eyes.
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公开(公告)号：US11994681B2
公开(公告)日：2024-05-28
申请号：US17477321
申请日：2021-09-16
Applicant: Apple Inc.
Inventor： Vikrant Bhakta , Guolin Peng , Hyungryul Choi , Kevin A. Keilbach , Scott M. DeLapp
CPC classification number: G02B27/0172 , G02B6/0016 , G02B6/003 , G02B2027/0123 , G02B2027/0147 , G02B2027/0163
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 on a waveguide and a lens that directs the light towards the input coupler. The input coupler may include a prism having a reflective surface that reflects the light into the waveguide. The reflective surface may be curved to provide the light with an optical power. The prism may be configured to expand a field of view of the light. A birefringent beam displacer may expand the effective pupil size of the light. The lens may include lens elements that converge the light at a location between the lens elements and the waveguide. A switchable panel may be placed at the location and toggled between first and second orientations to increase the effective resolution of the light.
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公开(公告)号：US11803056B2
公开(公告)日：2023-10-31
申请号：US16546157
申请日：2019-08-20
Applicant: Apple Inc.
Inventor： Guolin Peng , Eric J. Hansotte , Francesco Aieta , Graham B. Myhre , Hyungryul Choi , Nan Zhu , Paul J. Gelsinger-Austin , Se Baek Oh , Scott M. DeLapp , Bradley C. Steele
CPC classification number: G02B27/0172 , G02B27/12 , G02B27/14 , G02B2027/0174
Abstract: An electronic device may have a display that emits image light, a waveguide, and an input coupler that couples the image light into the waveguide. Beam splitter structures may be embedded within the waveguide. The beam splitter structures may partially reflect the image light multiple times and may serve to generate replicated beams of light that are coupled out of the waveguide by an output coupler. The beam splitter structures may replicate the beams across two dimensions to provide an eye box with uniform-intensity light from the display across its area. The beam splitter structures may include stacked partially reflective beam splitter layers, sandwiched transparent substrate layers having different indices of refraction, a thick volume hologram interposed between substrate layers, or combinations of these or other structures. The reflectivity of the beam splitter structures may vary discretely or continuously across the lateral area of the waveguide.
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Patent Agency Ranking
公开(公告)号：US20220011496A1
公开(公告)日：2022-01-13
申请号：US17482149
申请日：2021-09-22
Applicant: Apple Inc.
Inventor： Vikrant Bhakta , Scott M. DeLapp , Jonathan B. Pfeiffer , Hyungryul Choi , Guolin Peng
Abstract: An electronic device may include a waveguide with an input coupler and an output coupler. The input coupler may receive the image light from imaging optics. The input coupler may be an input coupling prism and the imaging optics may include lens elements. World light may be viewable at an eye box through the output coupler. Biasing, compensation, and/or prescription lenses may overlap the output coupler. The input coupling prism, the lens elements in the imaging optics, and/or one or more of the biasing, compensation, and prescription lenses may be formed from gradient index (GRIN) material. The GRIN material may have a gradient refractive index that varies in one or more gradient directions. Use of GRIN materials may minimize the volume required to form the device without sacrificing optical performance. In addition, the GRIN materials may compensate for dispersion and aberrations in the device.
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公开(公告)号：US20220004008A1
公开(公告)日：2022-01-06
申请号：US17477408
申请日：2021-09-16
Applicant: Apple Inc.
Inventor： Hyungryul Choi , Guolin Peng , Scott M. DeLapp , Vikrant Bhakta
IPC: G02B27/01
Abstract: An electronic device may have an optical combiner, a spatial light modulator, and illumination optics. The modulator may produce image light for the combiner by modulating illumination light from the illumination optics. Adjustable optical components in the illumination optics may be controlled to adjust the illumination optics between first and second states. In the first state, the adjustable optical components may provide the illumination light to the modulator with a uniform intensity across the lateral area of the modulator. In the second state, the adjustable optical components may focus the illumination light within a subset of the lateral area. The subset of the lateral area may correspond with a bright object in the image light. The control circuitry may control the illumination optics to ensure that the bright object remains visible at an eye box even when the device is located in bright ambient lighting conditions.
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公开(公告)号：US20220004007A1
公开(公告)日：2022-01-06
申请号：US17477321
申请日：2021-09-16
Applicant: Apple Inc.
Inventor： Vikrant Bhakta , Guolin Peng , Hyungryul Choi , Kevin A. Keilbach , Scott M. DeLapp
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 on a waveguide and a lens that directs the light towards the input coupler. The input coupler may include a prism having a reflective surface that reflects the light into the waveguide. The reflective surface may be curved to provide the light with an optical power. The prism may be configured to expand a field of view of the light. A birefringent beam displacer may expand the effective pupil size of the light. The lens may include lens elements that converge the light at a location between the lens elements and the waveguide. A switchable panel may be placed at the location and toggled between first and second orientations to increase the effective resolution of the light.
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公开(公告)号：US20240393591A1
公开(公告)日：2024-11-28
申请号：US18488865
申请日：2023-10-17
Applicant: Apple Inc.
Inventor： Scott M. DeLapp , Vikrant Bhakta , Hyungryul Choi , Guolin Peng , Di Hu
Abstract: A display device may include first and second display modules that provide image light to first and second waveguides. The waveguides may direct the image light to first and second eye boxes. Each display module may include optics mounted to a housing and mechanical alignment structures that mechanically adjust the position of an optical axis of the optics. The alignment structures may rotate the entire housing, may mechanically translate the optics, may adjust the position of a spatial light modulator within the module, and/or control circuitry may change a subset of pixels used by the modulator to compensate for optical misalignment between the first and second eye boxes. The device may include optical misalignment sensors that detect the optical misalignment. The control circuitry may compensate for the optical misalignment as detected by the optical misalignment sensors.
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公开(公告)号：US20240184116A1
公开(公告)日：2024-06-06
申请号：US18440534
申请日：2024-02-13
Applicant: Apple Inc.
Inventor： Di Hu , Guolin Peng , Vikrant Bhakta , Jose A Dominguez-Caballero , Hyungryul Choi
IPC: G02B27/01
CPC classification number: G02B27/0172 , G02B2027/0118
Abstract: An electronic device may have a display system with a module that produces image light and a waveguide that directs the image light towards an eye box. The module may include a light source, spatial light modulator, and collimating lens between the lens and modulator. The lens may direct illumination from the light source to the modulator, which modulates the illumination to produce the image light. The lens may have a geometry that illuminates the modulator with a non-uniform illumination pattern to mitigate subsequent brightness non-uniformity introduced by the waveguide. The light source may include one or more LEDs that are independently driven by control circuitry over one or more drive lines to help mitigate the non-uniformity introduced by the waveguide and/or to operate the display in a heads-up display mode.
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