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公开(公告)号：US11885967B2
公开(公告)日：2024-01-30
申请号：US17478679
申请日：2021-09-17
Applicant: Meta Platforms Technologies, LLC
Inventor： Wai Sze Tiffany Lam , Yang Yang , Wanli Chi , Dominic Meiser
CPC classification number: G02B27/0172 , G02B5/1833 , G02B5/1842 , G02B5/3083 , G02B6/005 , G02B6/0026 , G02B6/34 , G02B27/0081 , G02B27/0093 , G02B27/0944 , G02B27/286 , G02B2027/0118 , G02B2027/0123 , G02B2027/0174 , G02B2027/0178
Abstract: A waveguide display includes a substrate transparent to visible light, a first grating on the substrate and configured to couple display light into or out of the substrate, and a phase structure on the substrate and configured to change a polarization state of the display light after or before the display light reaches the first grating. The first grating is characterized by a polarization-dependent diffraction efficiency. The first grating includes, for example, a surface-relief grating or a volume Bragg grating.
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2.发明授权公开(公告)号：US11927758B1
公开(公告)日：2024-03-12
申请号：US17989159
申请日：2022-11-17
Applicant: Meta Platforms Technologies, LLC
Inventor： Wai Sze Tiffany Lam , Wanli Chi , Dominic Meiser , Yang Yang , Ningfeng Huang
CPC classification number: G02B27/0172 , G02B6/0035 , G02B2027/0112 , G02B2027/0125
Abstract: A display system includes a wearable eyewear arrangement with a projector for propagating display light associated with an image and a waveguide for propagating the display light to an eye box. The waveguide includes volume Bragg gratings (VBGs), which may be in groups of three or more gratings with same horizontal period allowing each color to be coupled out from the waveguide by the same type of grating, thus, at the same angle, reducing or eliminating image blurriness and ghost images while allowing a smaller size waveguide. A 100% reflective mirror or mirror array is used for broad spectrum reflection into the waveguide for light input. Selection of two or more wavelengths for each color at the projector provides spectral response matching to the waveguide allowing wider field of view (FOV) coverage for the entire wavelength spectrum.
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公开(公告)号：US11733521B2
公开(公告)日：2023-08-22
申请号：US17178016
申请日：2021-02-17
Applicant: Meta Platforms Technologies, LLC
Inventor： Wanli Chi , Yang Yang , Wai Sze Tiffany Lam , Dominic Meiser
CPC classification number: G02B27/0172 , G02B6/0208 , G02B2027/0123 , G02B2027/0174
Abstract: A waveguide display includes a plurality of grating layers, the plurality of grating layers characterized by two or more different base refractive indices and including a set of volume Bragg gratings (VBGs). Each VBG of the set of VBGs is configured to diffract display light in a different respective field-of-view (FOV) and wavelength range. The set of VBGs includes a plurality of groups of VBGs. VBGs in each respective group of the plurality of groups of VBGs are characterized by a same grating period and include at least one VBG in each grating layer of the plurality of grating layers.
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公开(公告)号：US11624926B1
公开(公告)日：2023-04-11
申请号：US17569381
申请日：2022-01-05
Applicant: Meta Platforms Technologies, LLC
Inventor： Wai Sze Tiffany Lam , Yang Yang , Dominic Meiser , Wanli Chi
Abstract: According to examples, a display system may include a disparity sensing detector, collection optics, and a first lens assembly. The first lens assembly may include a first projector to output a first display light associated with a first image and a first waveguide for propagating the first display light to the collection optics, in which the collection optics is to direct the first display light to the disparity sensing detector. The display system may also include a second lens assembly including a second projector to output a second display light associated with a second image and a second waveguide for propagating the second display light to the collection optics, in which the collection optics is to direct the second display light to the disparity sensing detector.
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公开(公告)号：US12282182B2
公开(公告)日：2025-04-22
申请号：US18063913
申请日：2022-12-09
Applicant: Meta Platforms Technologies, LLC
Inventor： Wai Sze Tiffany Lam , Wanli Chi , Yang Yang , Dominic Meiser
Abstract: A waveguide display system include a waveguide, an input coupler configured to couple display light into the waveguide, a first pupil expander, and a second pupil expander. The first pupil expander is configured to deflect, at a first plurality of locations along a first direction, the display light towards the second pupil expander. The second pupil expander is configured to deflect, at a second plurality of locations along a second direction different from the first direction, the display light from the first pupil expander towards an eyebox of the waveguide display system. At least one of the input coupler, the first pupil expander, or the second pupil expander includes transflective mirrors that are tilted within the waveguide such that the transflective mirrors are inconspicuous when viewed from an oblique angle.
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Patent Agency Ranking
公开(公告)号：US11774758B2
公开(公告)日：2023-10-03
申请号：US17184316
申请日：2021-02-24
Applicant: Meta Platforms Technologies, LLC
Inventor： Yang Yang , Wanli Chi , Wai Sze Tiffany Lam , Dominic Meiser
CPC classification number: G02B27/0172 , G02B6/0016 , G02B6/0036 , G02B27/102 , G02B2027/0112 , G02B2027/0123 , G02B2027/0174 , G06F3/012 , G06F3/013
Abstract: A waveguide display includes a waveguide, three input gratings configured to couple display light in different respective colors into the waveguide, one or more first middle gratings configured to receive and redirect the display light from the three input gratings, a second middle grating configured to diffract, at two or more regions of the second middle grating, the display light from the one or more first middle gratings, and an output grating configured to couple the display light from each of the two or more regions of the second middle grating out of the waveguide at two or more regions of the output grating.
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公开(公告)号：US20230213772A1
公开(公告)日：2023-07-06
申请号：US18120742
申请日：2023-03-13
Applicant: Meta Platforms Technologies, LLC
Inventor： Wai Sze Tiffany Lam , Yang Yang , Dominic Meiser , Wanli Chi
CPC classification number: G02B27/0172 , G02B27/0093 , G02B27/0101 , G02B2027/014 , G02B2027/0178
Abstract: According to examples, a display system may include a disparity sensing detector, collection optics, and a first lens assembly. The first lens assembly may include a first projector to output a first display light associated with a first image and a first waveguide for propagating the first display light to the collection optics, in which the collection optics is to direct the first display light to the disparity sensing detector. The display system may also include a second lens assembly including a second projector to output a second display light associated with a second image and a second waveguide for propagating the second display light to the collection optics, in which the collection optics is to direct the second display light to the disparity sensing detector.
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8.发明授权公开(公告)号：US11624917B2
公开(公告)日：2023-04-11
申请号：US16840119
申请日：2020-04-03
Applicant: Meta Platforms Technologies, LLC
Inventor： Wanli Chi , Dominic Meiser , Yang Yang , Wai Sze Tiffany Lam , Pasi Saarikko
Abstract: A waveguide display includes a waveguide and a grating coupler configured to couple display light into or out of the waveguide. The grating coupler includes at least a first grating layer and a second grating layer arranged in a stack. The first grating layer is characterized by a first thickness and includes a first transmission VBG configured to diffract display light of a first wavelength from a first field of view. The second grating layer is characterized by a second thickness greater than the first thickness and includes a second transmission VBG configured to diffract display light of the first wavelength from a second field of view greater than the first field of view.
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公开(公告)号：US12085717B2
公开(公告)日：2024-09-10
申请号：US17672418
申请日：2022-02-15
Applicant: Meta Platforms Technologies, LLC
Inventor： Wai Sze Tiffany Lam , Yang Yang , Dominic Meiser , Wanli Chi
CPC classification number: G02B27/0172 , G02B6/0038 , G02B6/0053 , G02B2027/0118 , G02B2027/0123 , G02B2027/0178
Abstract: According to examples, a display system may include a wearable eyewear arrangement that may include a lens assembly having a projector to propagate display light associated with an image. The lens assembly may also include a waveguide for propagating the display light to an eyebox. The waveguide may include a combination of a volume Bragg grating (VBG) component and a partial reflective component that are oriented in a pre-determined configuration to reflect or propagate the display light to maximize a coverage in field of view (FOV) at the eyebox, while minimizing at least one of a ghost image or an intercepting optical lines pattern.
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10.发明授权公开(公告)号：US11947117B2
公开(公告)日：2024-04-02
申请号：US17496550
申请日：2021-10-07
Applicant: Meta Platforms Technologies, LLC
Inventor： Wanli Chi , Dominic Meiser , Yang Yang , Wai Sze Tiffany Lam , Pasi Saarikko , Ningfeng Huang
CPC classification number: G02B27/0172 , G02B1/11 , G02B6/0016 , G02B6/0026 , G02B6/0038 , G02B6/005 , G02B27/0081 , G02B27/4205 , G02B27/44 , H04N9/3152 , G02B2027/0112 , G02B2027/0118 , G02B2027/012 , G02B2027/0123 , G02B2027/0138 , G02B2027/0174 , G02B2027/0178 , G02B2027/0187
Abstract: A waveguide display includes a waveguide transparent to visible light, a first volume Bragg grating (VBG) on the waveguide and characterized by a first refractive index modulation, and a second reflection VBG on the waveguide and including a plurality of regions characterized by different respective refractive index modulations. The first reflection VBG is configured to diffract display light in a first wavelength range and a first field of view (FOV) range such that the display light in the first wavelength range and the first FOV range propagates in the waveguide through total internal reflection to the plurality of regions of the second reflection VBG. The plurality of regions of the second reflection VBG are configured to diffract the display light in different respective wavelength ranges within the first wavelength range and the first FOV range.
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