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公开(公告)号：US10663732B2
公开(公告)日：2020-05-26
申请号：US15848265
申请日：2017-12-20
Applicant: North Inc.
Inventor： Lloyd Frederick Holland , Joshua Moore
Abstract: Systems, devices, and methods for beam combining are described. A monolithic beam combiner includes a solid volume of optically transparent material having a planar input surface, an output surface, a planar reflector physically coupled to the solid volume, and at least a first planar dichroic reflector within the solid volume. Multiple light sources input light into the solid volume through the planar input surface such that each light beam from a respective source is initially incident on one of the planar reflector and the at least a first planar dichroic reflector. The light is reflected by and transmitted through the reflectors and an aggregate beam is created. Because the reflectors are within an optically transparent material the beam combiner can be made more compact than a conventional beam combiner. This monolithic beam combiner is particularly well suited for use laser projectors and in wearable heads-up displays that employ laser projectors.
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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：US10437073B2
公开(公告)日：2019-10-08
申请号：US15852205
申请日：2017-12-22
Applicant: North Inc.
Inventor： Lloyd Frederick Holland , Joshua Moore
Abstract: Systems, devices, and methods for beam combining within laser projectors are described. A laser projector includes first, second, and third laser diodes to generate red, green, and blue laser light respectively, a controllable scan mirror, and a heterogeneous beam splitter system. The red, green, and blue laser light have distinct maximum powers. The heterogeneous beam splitter system splits at least one of the red, green, and blue laser light and combines respective first portions of all three into an aggregate beam. Second portions of laser light are excluded from the aggregate beam. At the maximum power of each laser light the aggregate beam is white as defined by a target white point. The heterogeneous beam splitter system directs the aggregate beam towards the controllable scan mirror which scans the beam onto a projection surface. Decreasing the power of the laser light post-generation provides a larger range of aggregate beam colors.
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Patent Agency Ranking
公开(公告)号：US20190265487A1
公开(公告)日：2019-08-29
申请号：US16282960
申请日：2019-02-22
Applicant: North Inc.
Inventor： Lloyd Frederick Holland , Joshua Moore , Stephen E. Orzel
Abstract: Systems, devices, and methods for wearable heads-up displays (WHUD) are described. A WHUD includes a front frame with two openings each with one recess which extends along at least a portion of the periphery of the openings, two arms including frame portions and temple portions, two lenses, a projector to generate light, and a holographic optical element (HOE) carried by a lens to redirect light to an eye of a user. Frame portions insert into the recesses and are held in place when the lenses are inserted into the recesses, wherein when the WHUD is assembled the projector and HOE are positioned correctly to create a display for the user. The assembled WHUD is inflexible where the front frame and arms are attached such that when worn the projector maintains a fixed position relative to the HOE and the display remains undistorted and visible to the user.
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公开(公告)号：US10365492B2
公开(公告)日：2019-07-30
申请号：US15848388
申请日：2017-12-20
Applicant: North Inc.
Inventor： Lloyd Frederick Holland , Joshua Moore
Abstract: Systems, devices, and methods for beam combining are described. A monolithic beam combiner includes a solid volume of optically transparent material having two orthogonally positioned planar input surfaces, an output surface, and at least two planar dichroic reflectors positioned within the solid volume. Multiple light sources input light into the solid volume through the two planar input surfaces such that each light beam from a respective source is initially incident on one of the planar dichroic reflectors. The light is reflected by and transmitted through the reflectors and an aggregate beam is created. Because the reflectors are within an optically transparent material the beam combiner can be made more compact than a conventional beam combiner. This monolithic beam combiner is particularly well suited for use laser projectors and in wearable heads-up displays that employ laser projectors.
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6.发明申请公开(公告)号：US20200082790A1
公开(公告)日：2020-03-12
申请号：US16568532
申请日：2019-09-12
Applicant: North Inc.
Inventor： Joshua Moore , Lloyd Frederick Holland , Jonathan Blake Huras , Charles Eiric Johnstone , Jiwon Yang , Victor Emile Isbrucker
Abstract: Systems, devices, and methods for detecting ambient light with wearable heads-up displays are described. An ambient light sensor can be positioned close to a user's eye area on a user-side of a wearable heads-up display. By positioning the ambient light sensor on a user-side of the wearable heads up display, the ambient light sensor can be in a position and/or orientation which receives ambient light in a similar manner a user's eye, and thus ambient light detection can be more accurate. Brightness of display light output by the wearable heads-up display can be adjusted in response to the detected brightness of ambient light.
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公开(公告)号：US10437074B2
公开(公告)日：2019-10-08
申请号：US15852282
申请日：2017-12-22
Applicant: North Inc.
Inventor： Lloyd Frederick Holland , Joshua Moore
Abstract: Systems, devices, and methods for beam combining within laser projectors are described. A laser projector includes first, second, and third laser diodes to generate red, green, and blue laser light respectively, a controllable scan mirror, and a heterogeneous beam splitter system. The red, green, and blue laser light have distinct maximum powers. The heterogeneous beam splitter system splits at least one of the red, green, and blue laser light and combines respective first portions of all three into an aggregate beam. Second portions of laser light are excluded from the aggregate beam. At the maximum power of each laser light the aggregate beam is white as defined by a target white point. The heterogeneous beam splitter system directs the aggregate beam towards the controllable scan mirror which scans the beam onto a projection surface. Decreasing the power of the laser light post-generation provides a larger range of aggregate beam colors.
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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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