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公开(公告)号：US10459222B2
公开(公告)日：2019-10-29
申请号：US15839064
申请日：2017-12-12
Applicant: NORTH INC.
Inventor： Stefan Alexander , Ken Wu , Vance R. Morrison
Abstract: Systems, devices, and methods for laser projectors with variable luminance that are well-suited for use in a wearable heads-up display (“WHUD”) are described. Such laser projectors include a laser light source(s) and a scan mirror(s) to generate an image in the field of view of a user, and a liquid crystal element between the light source(s) and the scan mirror(s) to adjust the luminance of the image. The liquid crystal element is on an optical path between the laser light source(s) and the scan mirror and is communicatively coupled to a controller that modulates an opacity of the liquid crystal element. The opacity of the liquid crystal element determines the luminance of the image and may be altered in response to different factors, such as ambient light. Particular applications of the laser projector systems, devices, and methods in a wearable heads-up display are described.
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公开(公告)号：US10197805B2
公开(公告)日：2019-02-05
申请号：US15145583
申请日：2016-05-03
Applicant: North Inc.
Inventor： Matthew Bailey , Stefan Alexander , Vance R. Morrison , Thomas Mahon , Lloyd Frederick Holland , Jaehong Choi
Abstract: Systems, devices, and methods for engineering the eyebox of a display using multiple heterogeneous exit pupils are described. The eyebox of a display includes at least two heterogeneous exit pupils that are different from one another in terms of size and/or shape. Heterogeneous exit pupils may overlap, one may encompass another, or they may be completely spatially-separated from one another. Such configurations enable specific eyebox and/or visual display configurations that can be advantageous in certain applications. An example in which a scanning laser-based wearable heads-up virtual retina display implements a holographic combiner that is engineered to provide multiple heterogeneous exit pupils is described.
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公开(公告)号：US10747000B2
公开(公告)日：2020-08-18
申请号：US15957449
申请日：2018-04-19
Applicant: NORTH INC.
Inventor： Stefan Alexander , Liang Yuan
Abstract: Systems, devices, and methods for holographic optical elements are described. A holographic optical element includes a first layer of holographic material and a second layer of holographic material. The first layer of holographic material includes a first hologram responsive to light in a first waveband and a second hologram responsive to light in a second waveband. The second layer of holographic material includes a third hologram responsive to light in a third waveband and may include a fourth hologram responsive to light in a fourth waveband. The first, second, third, and fourth wavebands are distinct and may comprise light of red, blue, green, and infrared wavelengths, respectively. Distribution of the three or four holograms on two layers of holographic material allows each hologram to have an index modulation of greater than 0.016, a diffraction efficiency of greater than 15%, and an angular bandwidth of greater than 12°.
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4.发明授权公开(公告)号：US10571617B2
公开(公告)日：2020-02-25
申请号：US15946565
申请日：2018-04-05
Applicant: North Inc.
Inventor： Stefan Alexander
Abstract: Systems, devices, and methods that implement waveguides in curved transparent combiners that are well-suited for use in wearable heads-up displays (WHUDs) are described. Waveguide structures with in-couplers and out-couplers are integrated with curved eyeglass lenses to provide transparent combiners that substantially match the shape, size, and geometry of conventional eyeglass lenses and can, in some implementations, embody prescription curvatures to serve as prescription eyeglass lenses. The waveguides and in-/out-couplers are planar or curved depending on the implementation.WHUDs that employ such curved transparent combiners are also described.
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5.发明授权公开(公告)号：US10509155B2
公开(公告)日：2019-12-17
申请号：US15946569
申请日：2018-04-05
Applicant: North Inc.
Inventor： Stefan Alexander
Abstract: Systems, devices, and methods that implement waveguides in curved transparent combiners that are well-suited for use in wearable heads-up displays (WHUDs) are described. Waveguide structures with in-couplers and out-couplers are integrated with curved eyeglass lenses to provide transparent combiners that substantially match the shape, size, and geometry of conventional eyeglass lenses and can, in some implementations, embody prescription curvatures to serve as prescription eyeglass lenses. The waveguides and in-/out-couplers are planar or curved depending on the implementation.WHUDs that employ such curved transparent combiners are also described.
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Patent Agency Ranking
公开(公告)号：US20190129676A1
公开(公告)日：2019-05-02
申请号：US16219426
申请日：2018-12-13
Applicant: NORTH INC.
Inventor： Stephen Lake , Stefan Alexander , Thomas Mahon
Abstract: Systems, devices, and methods for wearable computer systems are described. A wearable heads-up display (“WHUD”) is implemented as a peripheral to a wearable electronic band worn on a limb of the user. The majority (or all) of the application storage and processing is performed on the band instead of on the WHUD, and therefore the WHUD does not include all of the hardware infrastructure necessary for application storage and processing. This significantly reduces the bulk of the WHUD and enables more aesthetically pleasing WHUD designs. Graphics processing is also performed on the band instead of on the WHUD. In some implementations, rasterized display data is wirelessly transmitted from the band to the WHUD using an ultra-wideband wireless communication scheme. Gesture-based control of content displayed by the WHUD is enabled by sensors on-board the band itself or by a third wearable component in communication with the band.
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公开(公告)号：US10534182B2
公开(公告)日：2020-01-14
申请号：US16126564
申请日：2018-09-10
Applicant: NORTH INC.
Inventor： Stefan Alexander , Jake Chapeskie , Lloyd Frederick Holland , Thomas Mahon
Abstract: Systems, devices, and methods that integrate eye tracking capability into scanning laser projector (“SLP”)-based wearable heads-up displays are described. An infrared laser diode is added to an RGB SLP and an infrared photodetector is aligned to detect reflections of the infrared light from features of the eye. A holographic optical element (“HOE”) may be used to combine visible light, infrared light, and environmental light into the user's “field of view.” The HOE may be heterogeneous and multiplexed to apply positive optical power to the visible light and zero or negative optical power to the infrared light.
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公开(公告)号：US20190392163A1
公开(公告)日：2019-12-26
申请号：US16450152
申请日：2019-06-24
Applicant: North Inc.
Inventor： Stephen Lake , Matthew Bailey , Aaron Grant , Stefan Alexander
IPC: G06F21/62 , G06F3/01 , G06K9/00 , G09G5/12 , G06F3/14 , G06F21/60 , G06F21/31 , H04W12/00 , H04W12/08
Abstract: Systems, devices, and methods are disclosed for enabling private communication between head-mounted displays. A first user dons a first head-mounted display. The first head-mounted display authenticates that the first user is authorized to view information displayed by the first head-mounted display. In response to positive authentication, the first head-mounted display displays the information to the first user. The first user inputs a selection command via an input interface, such as, for example, gazing at particular information, to select some of the displayed information. The first head-mounted display generates a message based on the user selection, which may be encrypted by the first head-mounted display prior to transmission. The first head-mounted display transmits the message to a second head-mounted display, such that the second head-mounted display displays the message to an eye of a second user wearing the second head-mounted display.
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公开(公告)号：US10459223B2
公开(公告)日：2019-10-29
申请号：US15839075
申请日：2017-12-12
Applicant: NORTH INC.
Inventor： Stefan Alexander , Ken Wu , Vance R. Morrison
Abstract: Systems, devices, and methods for laser projectors with variable luminance that are well-suited for use in a wearable heads-up display (“WHUD”) are described. Such laser projectors include a laser light source(s) and a scan mirror(s) to generate an image in the field of view of a user, and a liquid crystal element between the light source(s) and the scan mirror(s) to adjust the luminance of the image. The liquid crystal element is on an optical path between the laser light source(s) and the scan mirror and is communicatively coupled to a controller that modulates an opacity of the liquid crystal element. The opacity of the liquid crystal element determines the luminance of the image and may be altered in response to different factors, such as ambient light. Particular applications of the laser projector systems, devices, and methods in a wearable heads-up display are described.
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公开(公告)号：US10527855B2
公开(公告)日：2020-01-07
申请号：US16127972
申请日：2018-09-11
Applicant: NORTH INC.
Inventor： Stefan Alexander , Douglas Raymond Dykaar , John Otto Vieth , Timothy Paul Bodiya
IPC: G02B27/01 , G06F3/01 , G02B27/00 , G02F1/29 , G02B6/28 , G02F1/13 , G02B5/32 , G02B26/08 , F21V8/00
Abstract: Systems, devices, and methods for optical waveguides that are well-suited for use in wearable heads-up displays (WHUDs) are described. An optical device comprises an optical waveguide including a volume of optically transparent material having a first longitudinal surface positioned opposite a second longitudinal surface across a width of the volume, a liquid crystal in-coupler, a controller to modulate a refractive index of the liquid crystal in-coupler, and an out-coupler. Light is in-coupled into the waveguide on a path that is dependent on the modulated refractive index of the liquid crystal in-coupler and is propagated along a length of the waveguide by total internal reflection between the longitudinal surfaces before being out-coupled by the out-coupler. In this way, light signals can be steered to create an image and/or to move an exit pupil of an image. WHUDs that employ such optical waveguides are also described.
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