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公开(公告)号：US20220291437A1
公开(公告)日：2022-09-15
申请号：US17667827
申请日：2022-02-09
发明人： Wai Sze Tiffany LAM , Yang YANG , Wanli CHI , Dominic MEISER
摘要： A waveguide display includes a first waveguide, a second waveguide, a spacer between the first waveguide and the second waveguide, and a light redirecting or absorbing structure on at least one surface of the first waveguide and/or at least one surface of the second waveguide. The first waveguide includes a first grating configured to couple a first portion of display light into the first waveguide and towards a second grating of the first waveguide. The second waveguide includes a third grating aligned with the first grating and configured to couple a second portion of the display light into the second waveguide and towards a fourth grating of the second waveguide. The light redirecting or absorbing structure is configured to absorb or redirect incident light from a first angular range towards an edge of the waveguide display, without altering incident light from other angular ranges.
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公开(公告)号：US20210055689A1
公开(公告)日：2021-02-25
申请号：US16550046
申请日：2019-08-23
摘要： Techniques disclosed herein relate to modifying refractive index modulation in a holographic optical element, such as a holographic grating. According to certain embodiments, a holographic optical element or apodized grating includes a polymer layer comprising a first region characterized by a first refractive index and a second region characterized by a second refractive index. The holographic optical element or apodized grating includes a plurality of nanoparticles dispersed in the polymer layer. The nanoparticles have a higher concentration in either the first region or the second region. In some embodiments, the nanoparticles may be configured to increase the refractive index modulation. In some embodiments, the nanoparticles may be configured to apodize the grating by decreasing the refractive index modulation proximate to sides of the grating. The refractive index may be modulated by applying a monomer reservoir buffer layer to the polymer layer, either before or after hologram fabrication.
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公开(公告)号：US20220137411A1
公开(公告)日：2022-05-05
申请号：US17478679
申请日：2021-09-17
发明人： Wai Sze Tiffany LAM , Yang YANG , Wanli CHI , Dominic MEISER
摘要： 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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公开(公告)号：US20200225479A1
公开(公告)日：2020-07-16
申请号：US16726667
申请日：2019-12-24
发明人： Wanli CHI , Hee Yoon LEE , Pasi SAARIKKO
摘要： A waveguide display includes a substrate transparent to visible light, a coupler configured to couple display light into the substrate such that the display light propagates within the substrate through total internal reflection, a first multiplexed volume Bragg grating (VBG) on the substrate, and a second multiplexed VBG on the substrate. The second multiplexed VBG overlaps with the first multiplexed VBG in at least a see-through region of the waveguide display. The first multiplexed VBG is configured to diffract the display light to two or more regions of the second multiplexed VBG, and the second multiplexed VBG is configured to diffract the display light to two or more regions of an eyebox of the waveguide display.
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公开(公告)号：US20220260836A1
公开(公告)日：2022-08-18
申请号：US17178016
申请日：2021-02-17
发明人： Wanli CHI , Yang YANG , Wai Sze Tiffany LAM , Dominic MEISER
摘要： 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：US20210011303A1
公开(公告)日：2021-01-14
申请号：US16505412
申请日：2019-07-08
发明人： Gregory Olegovic ANDREEV , Gang LI , Erik SHIPTON , Yingfei JIANG , Wanli CHI , Andrew John OUDERKIRK
摘要： Techniques disclosed herein relate to a near-eye display system. One example of an optical device of a near-eye display includes a substrate and holographic grating conformally coupled to a surface of the substrate. The substrate is transparent to visible light and infrared light and is configured to be placed in front of an eye of a user of the near-eye display. A refractive index modulation of the holographic grating is apodized in a surface-normal direction of the substrate to reduce optical artifacts in the visible light.
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公开(公告)号：US20200257065A1
公开(公告)日：2020-08-13
申请号：US16684009
申请日：2019-11-14
发明人： Wanli CHI , Hee Yoon LEE
摘要： An optical device (e.g., a pupil expander) includes a waveguide with a slanted facet. The optical device includes a reflector on the slanted facet and a prism, or a grating at the slanted facet. The prism or the grating compensates for the dispersion of an image light from a display, which reduces smearing of displayed images. The waveguide can be configured for pupil replication in one-dimension or two-dimensions.
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公开(公告)号：US20220269076A1
公开(公告)日：2022-08-25
申请号：US17184316
申请日：2021-02-24
发明人： Yang YANG , Wanli CHI , Wai Sze Tiffany LAM , Dominic MEISER
摘要： 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：US20220269075A1
公开(公告)日：2022-08-25
申请号：US17184312
申请日：2021-02-24
发明人： Yang YANG , Wanli CHI , Wai Sze Tiffany LAM , Dominic MEISER
摘要： A waveguide display includes a waveguide and a staircase structure coupled to the waveguide. The waveguide includes a first substrate, a second substrate, and a holographic material layer between the first substrate and the second substrate. The holographic material layer includes a first grating and a second grating. The staircase structure is positioned on top of at least a portion of the first grating but not on top of the second grating. The staircase structure includes an input grating that is on top of the first grating and is configured to couple display light into the waveguide. The first grating is configured to redirect the display light coupled into the waveguide by the input grating towards the second grating.
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10.发明申请公开(公告)号：US20220099980A1
公开(公告)日：2022-03-31
申请号：US17496550
申请日：2021-10-07
发明人： Wanli CHI , Dominic MEISER , Yang YANG , Wai Sze Tiffany LAM , Pasi SAARIKKO , Ningfeng HUANG
摘要： 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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