Patents Assigned to NORTH INC.
  • Patent number: 10451881
    Abstract: Systems, devices, and methods for preventing eyebox degradation in wearable heads-up displays (“WHUDs”) are described. A WHUD may provide an eyebox defined by multiple spatially-separated exit pupils, where the size of the eyebox is influenced by the spacing between the exit pupils. A larger eyebox is achieved with larger spacing between the exit pupils but a larger spacing between exit pupils is susceptible to the formation of gaps or blind spots in the eyebox (eyebox degradation) if bright environmental light causes the user's pupil to constrict to a size that is smaller than the spacing between the exit pupils. A material of variable chromism is included in the user's field of view to reduce the perceived brightness of environmental light and thereby prevent the user's pupil from constricting to a size smaller than the spacing between the exit pupils.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: October 22, 2019
    Assignee: North Inc.
    Inventor: Matthew Bailey
  • Patent number: 10444608
    Abstract: Laser safety systems, devices, and methods for use in laser projectors are described. A laser projector includes any number of laser diodes that each emit laser light, a laser diode power source, a current sensor to detect a magnitude of the electric current output by the power source, a photodetector to detect a power/intensity of the laser light, a beam splitter to direct a first portion of the light towards the photodetector and a second portion of the light towards an output on the projector, and first and second laser safety circuits responsive to signals from the photodetector and the current sensor, respectively. The laser safety circuits selectively electrically couples/uncouples the laser diodes from the power source depending on signals from the photodetector and/or the current sensor. Particular applications of the laser safety systems, devices, and methods in a wearable heads-up display are described.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: October 15, 2019
    Assignee: North Inc.
    Inventor: Kai Xu
  • Patent number: 10444609
    Abstract: Laser safety systems, devices, and methods for use in laser projectors are described. A laser projector includes any number of laser diodes that each emit laser light, a laser diode power source, a current sensor to detect a magnitude of the electric current output by the power source, a photodetector to detect a power/intensity of the laser light, a beam splitter to direct a first portion of the light towards the photodetector and a second portion of the light towards an output on the projector, and first and second laser safety circuits responsive to signals from the photodetector and the current sensor, respectively. The laser safety circuits selectively electrically couples/uncouples the laser diodes from the power source depending on signals from the photodetector and/or the current sensor. Particular applications of the laser safety systems, devices, and methods in a wearable heads-up display are described.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: October 15, 2019
    Assignee: North Inc.
    Inventor: Kai Xu
  • Patent number: 10444610
    Abstract: Laser safety systems, devices, and methods for use in laser projectors are described. A laser projector includes any number of laser diodes that each emit laser light, a laser diode power source, a current sensor to detect a magnitude of the electric current output by the power source, a photodetector to detect a power/intensity of the laser light, a beam splitter to direct a first portion of the light towards the photodetector and a second portion of the light towards an output on the projector, and first and second laser safety circuits responsive to signals from the photodetector and the current sensor, respectively. The laser safety circuits selectively electrically couples/uncouples the laser diodes from the power source depending on signals from the photodetector and/or the current sensor. Particular applications of the laser safety systems, devices, and methods in a wearable heads-up display are described.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: October 15, 2019
    Assignee: North Inc.
    Inventor: Kai Xu
  • Patent number: 10444516
    Abstract: Methods, apparatus, and articles of manufacture are disclosed. An example head-worn display apparatus includes a frame to support a lens and a housing having an image generator. The housing couples the image generator to the frame and is to project an image adjacent the lens. The apparatus includes a stem having a first end and a second end. The first end of the stem is to couple to the housing of the image generator and the second end of the stem to project from the image generator. The stem has a non-flexed use position and a flexed use position, where at least a portion of the stem between the first end and the second end is to move relative to the housing of the image generator when the stem moves between the non-flexed position and the flexed position while a position of the image generator remains in a fixed relationship relative to the frame.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: October 15, 2019
    Assignee: North Inc.
    Inventor: Mark J. Eastwood
  • Publication number: 20190313249
    Abstract: Systems, devices, and methods establish encrypted communications between wearable electronic devices. In response to a physical contact between a first wearable electronic device and a second wearable electronic device respective impact sensors of the first and second wearable electronic devices generate sensor signals. A first identity signal is transmitted from the first wearable device and received at the second wearable device. The second wearable device determines that at least a portion of the first identity signal corresponds to at least a portion of an expected identity signal and, if so, uses the at least a portion of the first identity signal and the at least a portion of the expected identity signal as encryption keys to provide encrypted communications. The first identity signal and/or the expected identity signal may be at least partially based upon or derived from the sensor signal(s) generated by the impact sensor(s).
    Type: Application
    Filed: April 10, 2019
    Publication date: October 10, 2019
    Applicant: North Inc.
    Inventors: Jason T. Griffin, Steven Henry Fyke
  • Patent number: 10437071
    Abstract: Disclosed herein are devices and methods to provide a display including a projection system and a removable lenses including a holographic optical element to receive light and reflect the light to an exit pupil. Each of the removable lenses may comprise a holographic optical element in a different position of the lens to change the position of the exit pupil. The projection system may project an image onto the holographic optical element to project the image to the exit pupil.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: October 8, 2019
    Assignee: North Inc.
    Inventors: Eric Tremblay, Mickael Guillaumee, David Ziegler, Christophe Moser, Philippe De Gol
  • Patent number: 10437073
    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.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: October 8, 2019
    Assignee: North Inc.
    Inventors: Lloyd Frederick Holland, Joshua Moore
  • Patent number: 10438391
    Abstract: Systems, devices, and methods that display visual symbols are described. A visual symbol has a color and a linewidth. Multiple instances of the symbol are concurrently and progressively drawn, one on top of the other, in the display area of a display device. Each respective instance has a respective intermediate color. The respective intermediate colors combine to produce the color of the symbol where the respective instances overlap in the display area. Each respective instance also has a respective linewidth and the respective linewidths converge to the linewidth of the symbol as each instance is progressively drawn. A backwards progression through the same sequence is employed to regressively undraw a symbol from the display area of the display device. Computer program products comprising processor-executable instructions for performing the methods are also described.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: October 8, 2019
    Assignee: North Inc
    Inventors: Rachel Kreutzkamp, Ryan Alexander West, Brent Bisaillion, Steven M. Eggert
  • Patent number: 10437325
    Abstract: Apparatuses, methods and storage medium associated with retinal see through display are disclosed herein. In embodiments, an apparatus may comprise a retinal see through display wearable by a user; a target luminance calculator to determine a required luminance level; and a display power controller to determine a power level for the retinal see through display, based at least in part on a pupil size of the user and the determined required luminance level. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: October 8, 2019
    Assignee: North Inc.
    Inventors: Christophe Le Gros, Gatien Cosendey
  • Patent number: 10437074
    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.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: October 8, 2019
    Assignee: North Inc.
    Inventors: Lloyd Frederick Holland, Joshua Moore
  • Patent number: 10440336
    Abstract: According to the present invention there is provided a method of reducing speckle in a primary light spot which is projected onto a surface by a projection device which comprises a laser, wherein a primary light spot is defined by two or more secondary light spots, the method comprising the steps of (a) consecutively providing the laser with “n” different input currents so that the laser consecutively outputs “n” different light beams, wherein each one of the “n” different light beams defines a secondary light spot on the surface, wherein “n” is an integer value greater than one; and (b) superposing the secondary light spots. There is further provided a corresponding method of projecting a pixel.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: October 8, 2019
    Assignee: North Inc.
    Inventors: Christophe Le Gros, Nicolas Abele
  • Patent number: 10437067
    Abstract: Systems, devices, and methods for preventing eyebox degradation in wearable heads-up displays (“WHUDs”) are described. A WHUD may provide an eyebox defined by multiple spatially-separated exit pupils, where the size of the eyebox is influenced by the spacing between the exit pupils. A larger eyebox is achieved with larger spacing between the exit pupils but a larger spacing between exit pupils is susceptible to the formation of gaps or blind spots in the eyebox (eyebox degradation) if bright environmental light causes the user's pupil to constrict to a size that is smaller than the spacing between the exit pupils. A material of variable chromism is included in the user's field of view to reduce the perceived brightness of environmental light and thereby prevent the user's pupil from constricting to a size smaller than the spacing between the exit pupils.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: October 8, 2019
    Assignee: North Inc.
    Inventor: Matthew Bailey
  • Patent number: 10429655
    Abstract: Systems, devices, and methods that integrate eye tracking capability into scanning laser projector (“SLP”)-based wearable heads-up displays are described. At least one narrow waveband laser diode is used in an SLP to define one or more portion(s) of a visible image. At least one corresponding narrow waveband photodetector is aligned to detect reflections of the portion(s) of the image from features of the eye. A holographic optical element (“HOE”) may be used to combine the image and environmental light into the user's “field of view.” Three narrow waveband photodetectors each responsive to a respective one of three narrow wavebands output by the RGB laser diodes of an RGB SLP are aligned to detect reflections of a projected RGB image from features of the eye.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: October 1, 2019
    Assignee: North Inc.
    Inventors: Stefan Alexander, Jake Chapeskie, Lloyd Frederick Holland, Thomas Mahon
  • Patent number: 10430980
    Abstract: Systems, devices, and methods that display visual symbols are described. A visual symbol has a color and a linewidth. Multiple instances of the symbol are concurrently and progressively drawn, one on top of the other, in the display area of a display device. Each respective instance has a respective intermediate color. The respective intermediate colors combine to produce the color of the symbol where the respective instances overlap in the display area. Each respective instance also has a respective linewidth and the respective linewidths converge to the linewidth of the symbol as each instance is progressively drawn. A backwards progression through the same sequence is employed to regressively undraw a symbol from the display area of the display device. Computer program products comprising processor-executable instructions for performing the methods are also described.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: October 1, 2019
    Assignee: North Inc.
    Inventors: Rachel Kreutzkamp, Ryan Alexander West, Brent Bisaillion, Steven M. Eggert
  • Patent number: 10419731
    Abstract: Disclosed herein are systems and techniques related to virtual image projection systems. In some examples, the system may include a scanning mirror arrangement for receiving a light beam and reflecting the light beam to a projection surface and a dynamic optical lens for focusing the light beam at a focal plane so that the light beam reflected from the projection surface is collimated or diverging enabling the projected image to be perceived as a virtual image.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: September 17, 2019
    Assignee: NORTH INC.
    Inventors: Lucio Kilcher, Nicolas Abele
  • Patent number: 10409057
    Abstract: Systems, devices, and methods that use elements of a scanning laser projector (“SLP”) to determine the gaze direction of a user of a wearable heads-up display (“WHUD”) 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 the eye. A scan mirror in the SLP sweeps through a range of orientations and the intensities of reflections of the infrared light are monitored by a processor to determine when a spectral reflection or “glint” is produced. The processor determines the orientation of the scan mirror that produced the glint and maps the scan mirror orientation to a region in the field of view of the eye of the user, such as a region in visible display content projected by the WHUD, to determine the gaze direction of the user.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: September 10, 2019
    Assignee: NORTH INC.
    Inventors: Idris S. Aleem, Mayank Bhargava
  • Patent number: 10409082
    Abstract: Disclosed herein are systems and techniques related to optical projection systems. In some examples, the system may include a scanning mirror arrangement for receiving a light beam and reflecting the light beam to a projection surface and a dynamic optical lens for focusing the light beam at points on a focal plane. Dynamic optical lens can be adjusted to focus the light beam on multiple points of the focal plane, where some of the points are disposed a different distance from the dynamic optical lens.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: September 10, 2019
    Assignee: NORTH INC.
    Inventors: Lucio Kilcher, Nicolas Abele
  • Patent number: 10409076
    Abstract: A head worn display (HWD) includes a projection system, which projection system in turn may include: a projection surface including a holographic optical element (HOE) centered at a first location; a projector to project light onto a projection area of the projection surface; and a controller to send a control signal to the projector to cause the projector to project an image onto a location shifted from the first location based on a misalignment of a user's line of sight with the first location.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: September 10, 2019
    Assignee: NORTH INC.
    Inventors: Eric Tremblay, Nicolas Abele, Alexandre Fotinos, Mickael Guillaumee, David Ziegler, Christophe Moser, Philippe De Gol
  • Patent number: 10401640
    Abstract: A micro-projection system for projecting light on a projection surface, comprising: at least one coherent light source (101); optical elements (102, 108, 109) in the optical path between said coherent light source and said projection surface; said optical elements including at least one reflective member (102) actuated by a drive signal for deviating light from said light source so as to scan a projected image onto said projecting surface; said optical elements including at least one vibrating element (102) actuated by a vibrating signal so as to reduce speckle onto said projecting surface. The corresponding method for reducing speckle is also provided.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: September 3, 2019
    Assignee: North Inc.
    Inventors: Lucio Kilcher, Nicolas Abele, Faouzi Khechana