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公开(公告)号：US12282163B2
公开(公告)日：2025-04-22
申请号：US17566048
申请日：2021-12-30
Applicant: Goertek Inc.
Inventor： Lingshan Li
Abstract: An optical waveguide system and an electronic device are disclosed. The system comprises: a waveguide; an input coupler coupling a light into the waveguide; and an output coupler, wherein the input coupler includes a right portion and a left portion, wherein the right portion includes stacked first and second polarization volume gratings, the left portion includes stacked third and fourth polarization volume gratings. The first and fourth polarization volume gratings are polarization volume gratings optimized for a right-hand-side field of view of the light, and the third and second polarization volume gratings are polarization volume gratings optimized for a left-hand-side field of view of the light.
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2.发明公开公开(公告)号：US20230251429A1
公开(公告)日：2023-08-10
申请号：US17666731
申请日：2022-02-08
Applicant: Goertek Inc.
Inventor： Lingshan Li
CPC classification number: G02B6/34 , G02B5/3016 , G02B5/1866
Abstract: A polarization volume grating, an optical waveguide system and an electronic device are disclosed. Parameters of the polarization volume grating satisfy with those derived by performing a multivariable optimization algorithm on a merit function of ƒk(d1,ϕ1,d2,ϕ2, . . . , dm,ϕm,d)=[1−η1(θ,ψ)]2, wherein the parameters include d1,ϕ1,d2,ϕ2, . . . , dm,ϕm, where m=1, 2, 3, . . . , and d, m is the number of layers of the polarization volume grating, dm is a thickness of mth layer, ϕm is a twist angle in mth layer, and d is a period of the polarization volume grating, k represents a central wavelength on which the multivariable optimization algorithm is performed, θ represents a polar angle of an incident light, ψ represents an azimuth angle of the incident light, and η1(θ,ψ) represents a first-order diffraction efficiency of the polarization volume grating.
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3.发明公开公开(公告)号：US20230251500A1
公开(公告)日：2023-08-10
申请号：US17666717
申请日：2022-02-08
Applicant: Goertek Inc.
Inventor： Lingshan Li
CPC classification number: G02B27/44 , G02B27/4205 , G02B27/4266 , G02B27/0101 , G02B27/0172 , G02B5/1842 , G02B5/1814 , G06F17/11
Abstract: A method of conical anisotropic rigorous coupled wave analysis for grating and a computing device are disclosed. The method comprises: obtaining a target geometric phase δ′g for the anisotropic-material-based grating; obtaining a slow axis azimuth angle ϕc(x) of the anisotropic-material-based grating according to the target geometric phase δ′g; obtaining a permittivity tensor of the anisotropic-material-based grating, wherein the anisotropic-material-based grating has an ordinary index no and an extraordinary index ne, the anisotropic-material-based grating has a slow axis polar angle θc and slow axis azimuth angle ϕc(x), and the permittivity tensor is based on no, ne, θc and ϕc(x); applying the permittivity tensor into Maxwell equations; obtaining electromagnetic field for the anisotropic-material-based grating by using boundary conditions of at least two layers or sublayers of the anisotropic-material-based grating and Maxwell equations for each layer or sublayer, to obtain a diffraction efficiency for the anisotropic-material-based grating.
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Patent Agency Ranking
公开(公告)号：US20230213760A1
公开(公告)日：2023-07-06
申请号：US17566048
申请日：2021-12-30
Applicant: Goertek Inc.
Inventor： Lingshan Li
CPC classification number: G02B27/0172 , G02B6/0016 , G02B6/0036 , G02B2027/0123
Abstract: An optical waveguide system and an electronic device are disclosed. The system comprises: a waveguide; an input coupler coupling a light into the waveguide; and an output coupler, wherein the input coupler includes a right portion and a left portion, wherein the right portion includes stacked first and second polarization volume gratings, the left portion includes stacked third and fourth polarization volume gratings. The first and fourth polarization volume gratings are polarization volume gratings optimized for a right-hand-side field of view of the light, and the third and second polarization volume gratings are polarization volume gratings optimized for a lefthand-side field of view of the light.
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5.发明公开公开(公告)号：US20230350138A1
公开(公告)日：2023-11-02
申请号：US17733340
申请日：2022-04-29
Applicant: Goertek Inc.
Inventor： Lingshan Li
CPC classification number: G02B6/4213 , G02B6/0075
Abstract: An optical waveguide system with angle-multiplexing polarization volume gratings and an electronic device are disclosed. The system comprises: a waveguide; an input coupler coupling a combined image light for a combined image into the waveguide; and an output coupler coupling the combined image light out of the waveguide. The combined image light includes a first image light for a first image and a second image light for a second image, which are combined to from the combined image. The first image light and the second image light have different polarizations. The output coupler includes first and second output polarization volume gratings, which are optimized for different polarizations, respectively, wherein the first output polarization volume grating couples the first image light out of the waveguide, and the second output polarization volume grating couples the second image light out of the waveguide.
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公开(公告)号：US11719886B1
公开(公告)日：2023-08-08
申请号：US17666731
申请日：2022-02-08
Applicant: Goertek Inc.
Inventor： Lingshan Li
CPC classification number: G02B6/34 , G02B5/1866 , G02B5/3016
Abstract: A polarization volume grating, an optical waveguide system and an electronic device are disclosed. Parameters of the polarization volume grating satisfy with those derived by performing a multivariable optimization algorithm on a merit function of ƒk(d1,ϕ1,d2,ϕ2, . . . , dm,ϕm,d)=[1−n1(θ,ψ)]2, wherein the parameters include d1,ϕ1,d2,ϕ2, . . . , dm,ϕm, where m=1,2,3, . . . , and d, m is the number of layers of the polarization volume grating, dm is a thickness of mth layer, ϕm is a twist angle in mth layer, and d is a period of the polarization volume grating, k represents a central wavelength on which the multivariable optimization algorithm is performed, θ represents a polar angle of an incident light, ψ represents an azimuth angle of the incident light, and n1(θ,ψ) represents a first-order diffraction efficiency of the polarization. volume grating.
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公开(公告)号：US12197011B2
公开(公告)日：2025-01-14
申请号：US17666678
申请日：2022-02-08
Applicant: Goertek Inc.
Inventor： Lingshan Li
IPC: G02B6/27
Abstract: An optical waveguide system and an electronic device are disclosed. The optical waveguide system comprises: a waveguide; an input coupler, coupling a light including a first and a second color component into the waveguide; and an output coupler, including: a first polarization color filter, converting the first color component of a first polarization state into the first color component of a second polarization state without changing the second color component of the first polarization state; a first polarization volume grating, coupling the first color component out of the waveguide; a second polarization color filter, converting the second color component of the first polarization state into the second color component of the second polarization state without changing the first color component of the first polarization state; a second polarization volume grating, coupling the second color component out of the waveguide.
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公开(公告)号：US12140754B2
公开(公告)日：2024-11-12
申请号：US17566019
申请日：2021-12-30
Applicant: Goertek Inc.
Inventor： Lingshan Li
Abstract: An optical display system and an augmented reality electronic device are disclosed. The optical display system comprises: a waveguide; an input coupler, provided at the input end of the waveguide and couples an image light into it; and a two-dimensional grating, provided at the output end of waveguide. The waveguide delivers the image light to the two-dimensional grating, which performs pupil expansion on the image light and out-couples the expanded image light. The two-dimensional grating has rhombus lattices. Unit cells of the two-dimensional grating are un-symmetric along respective axes parallel with a propagation direction of the image light incident onto the two-dimensional grating, from a top view of the two-dimensional grating. The unit cells are oriented with the propagation direction of the image light and each of the unit cells has at least two vertexes at its end side.
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