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公开(公告)号：US20230367073A1
公开(公告)日：2023-11-16
申请号：US18076236
申请日：2022-12-06
CPC分类号： G02B6/29395 , G02B6/0016
摘要： A waveguide for conveying image light in a display device is disclosed. The waveguide comprises a waveguide body, an input coupler configured to couple the image light into the waveguide body for propagating the image light within the waveguide body along a zigzag light path, and a plurality of slanted bulk mirrors disposed along the zigzag light path within the waveguide body and having a tunable reflectivity parameter for controlling a spatial distribution of image light portions out-coupled from the waveguide body by the plurality of slanted bulk mirrors. The waveguide may include a plurality of slanted polarization-selective bulk mirrors, and a liquid crystal layer configured to alter the polarization of the image light, the liquid crystal layer being disposed between a backplane electrode and a pixelated electrode configured to control the liquid crystal layer by application of a spatially-varying voltage profile.
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公开(公告)号：US11768330B2
公开(公告)日：2023-09-26
申请号：US17485064
申请日：2021-09-24
发明人： Miaomiao Xu , Brian Wheelwright , Ying Geng
CPC分类号： G02B6/29301 , G02B27/0101 , G02B27/0172 , G02B27/30 , G02B2027/0123
摘要： A device includes an array of light emitters configured to generate multiple light beams to form an image, the image having a field of view and a planar waveguide having an edge configured to receive multiple light beams from the array of light emitters, each light beam associated with a portion of the field of view. The device also includes a lens array comprising multiple lenses linearly extended to overlap an edge portion of the planar waveguide, the lenses optically coupling the light beams into the planar waveguide, and one or more output couplers in the planar waveguide configured to direct the light beams into an eyebox, wherein the eyebox forms an area that includes a pupil of a viewer of the image.
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公开(公告)号：US20240094552A1
公开(公告)日：2024-03-21
申请号：US18171944
申请日：2023-02-21
发明人： Miaomiao Xu , Wanli Chi , Alexander Sohn
CPC分类号： G02B27/106 , G02B6/2817 , G02B27/0172
摘要： A waveguide may include a substrate and an array of beam splitters embedded within the substrate, where each beam splitter within the array of beam splitters does not fully transect the substrate. Various other devices, systems, and methods of manufacture are also disclosed.
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公开(公告)号：US20230098034A1
公开(公告)日：2023-03-30
申请号：US17485064
申请日：2021-09-24
发明人： Miaomiao Xu , Brian Wheelwright , Ying Geng
摘要： A device includes an array of light emitters configured to generate multiple light beams to form an image, the image having a field of view and a planar waveguide having an edge configured to receive multiple light beams from the array of light emitters, each light beam associated with a portion of the field of view. The device also includes a lens array comprising multiple lenses linearly extended to overlap an edge portion of the planar waveguide, the lenses optically coupling the light beams into the planar waveguide, and one or more output couplers in the planar waveguide configured to direct the light beams into an eyebox, wherein the eyebox forms an area that includes a pupil of a viewer of the image.
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公开(公告)号：US12099190B2
公开(公告)日：2024-09-24
申请号：US17549394
申请日：2021-12-13
发明人： Sihui He , Maxwell Parsons , Fenglin Peng , Miaomiao Xu , Yang Yang , Yu Shi , Dianmin Lin
CPC分类号： G02B27/0172 , G02B5/1842 , G02B5/32 , G02B6/4206 , G02B6/4213 , G02B27/0081 , G02B6/0018 , G02B6/0036 , G02B2027/0174 , G02B2027/0178
摘要： A waveguide is provided. The waveguide includes a substrate having two outer surfaces for propagating a beam of light in the substrate by reflecting the beam from the two outer surfaces. The waveguide includes at least one polarization volume hologram (PVH) grating to couple light in and/or out of the waveguide. The PVH grating may be a multi-layer PVH grating with graded birefringence.
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公开(公告)号：US20240231093A1
公开(公告)日：2024-07-11
申请号：US18094807
申请日：2023-01-09
CPC分类号： G02B27/0172 , G02B6/0016 , G02B6/0036 , G02B6/005 , G02B2027/0174
摘要： A light field display is composed of a light source assembly (LSA), a collimating lens, an incoupling section, a spatial light modulator (SLM), and gratings. The LSA includes point light sources that emit light at different time periods. The collimating lens collimates light from the point light sources. The incoupling section incouples the collimated light to a waveguide. The SLM spatially modulates the collimated light. The gratings outcouple spatially modulated light from the waveguide, and for any given point light source of the point light sources, the given point light source has a respective corresponding grating of the gratings that outcouples from the waveguide light that originated from the given point light source. The spatially modulated light output in each time period forms a respective virtual emitter in an eyebox, and over the different time periods the virtual emitters in aggregate form at least one virtual object.
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公开(公告)号：US20240210611A1
公开(公告)日：2024-06-27
申请号：US18371780
申请日：2023-09-22
发明人： Miaomiao Xu , Ying Geng , Sheng Ye , Andrew John Ouderkirk , Liliana Ruiz Diaz , Zhaoyu Nie
CPC分类号： G02B6/0055 , G02B27/0172 , G02B2027/0178
摘要： A lightguide with partially reflective slanted polarization-selective bulk mirrors is disclosed. The lightguide may be used in a near-eye display with a polarized image source. The polarization-selective bulk mirrors reflect light of the polarized image source, and fully transmit light of the orthogonal polarization, causing the mirrors to be less conspicuous to an external viewer while preserving high efficiency of delivery of the image light to the viewer.
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8.发明授权公开(公告)号：US11960088B2
公开(公告)日：2024-04-16
申请号：US17709942
申请日：2022-03-31
发明人： Miaomiao Xu , Brian Wheelwright , Ying Geng
CPC分类号： G02B27/0172 , G06T19/006 , G02B2027/0187
摘要： A head-mounted display (HMD) for improved field of view (FOV) is provided. The head-mounted display (HMD) may include a display element to provide display light. The head-mounted display (HMD) may also include a lens element to provide display light to a user of the head-mounted display (HMD). The head-mounted display (HMD) may further include an optical element comprising at least one waveguide to provide improved central or peripheral field of view (FOV) for the user of head-mounted display (HMD). In some examples, the waveguide may be part of central optics and/or peripheral optics. The waveguide may have a planar waveguide profile or a curved waveguide profile. In some examples, the waveguide may be stacked or may include a graded index (GRIN) layer.
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