Patents Assigned to NORTH INC.
  • Patent number: 10598952
    Abstract: Assembly (1) comprising a laser source (3) and a component for reducing speckle (7) comprising a beam splitter (9) that reflects a first portion (11) of the laser beam and transmits a second portion (13) and a first and second reflecting means (15, 17), the first reflective means (15) receiving the second portion (13) of the laser beam and the second reflective means (17) directing said second portion (13) back to the beam splitter (9), wherein the second portion (13) of the laser beam can be directed from the first (15) to the the second reflective means (17), wherein the first (15), the second (17) reflective means and the means for beam splitting (9) define an optical path for the second portion (13) of the laser beam, the length of which being equal to, or greater than, the coherence length of the laser beam.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: March 24, 2020
    Assignee: North Inc.
    Inventors: Christophe Le Gros, Lucio Kilcher
  • Patent number: 10598925
    Abstract: A projection device According to the present invention there is provided a projection device (30,50,100) comprising, a light source (31,61) which can provide light beams (32a,b,c 62a,b,c), wherein the light beams (32a,b,c 62a,b,c) can be used to define one or more pixels of a virtual image (48); a MEMS micro mirror (34) which is arranged to receive the light beams (32a,b,c 62a,b,c) provided by the light source (31,61), and wherein the MEMS micro mirror (34) can oscillate about at least one oscillation axis (7,17) to scan the light beams (32a,b,c 62a,b,c); a reflective element (38), which comprises a plurality of convex reflective projections (39), and wherein the reflective element (38) is arranged so that light beams (32a,b,c 62a,b,c) reflected by the MEMS micro mirror (34) are incident on said convex reflective projections (39), so that the light beams (32a,b,c 62a,b,c) are reflected by the convex reflective projections (39); a beam combiner (45,81), wherein the beam combiner is arranged to receive the ligh
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: March 24, 2020
    Assignee: North Inc.
    Inventors: Jonathan Masson, Lucio Kilcher
  • Patent number: 10579141
    Abstract: Systems, methods and articles that provide dynamic calibration of eye tracking systems for wearable heads-up displays (WHUDs). The eye tracking system may determine a user's gaze location on a display of the WHUD utilizing a calibration point model that includes a plurality of calibration points. During regular use of the WHUD by the user, the calibration point model may be dynamically updated based on the user's interaction with user interface (UI) elements presented on the display. The UI elements may be specifically designed (e.g., shaped, positioned, displaced) to provide in-use and on-going dynamic calibration of the eye tracking system, which in at least some implementations may be unnoticeable to the user.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: March 3, 2020
    Assignee: North Inc.
    Inventors: Idris S. Aleem, Mayank Bhargava, Dylan Jacobs
  • Patent number: 10571703
    Abstract: Systems, devices, and methods of manufacturing optical engines and laser projectors that are well-suited for use in wearable heads-up displays (WHUDs) are described. Generally, the optical engines of the present disclosure integrate a plurality of laser diodes (e.g., 3 laser diodes, 4 laser diodes) within a single, hermetically or partially hermetically sealed, encapsulated package. Photonic integrated circuits having grating couplers thereon may be used to wavelength multiplex beams of light emitted by the plurality of laser diodes into a coaxially superimposed aggregate beam. Such optical engines may have various advantages over existing designs including, for example, smaller volumes, better manufacturability, faster modulation speed, etc. WHUDs that employ such optical engines and laser projectors are also described.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: February 25, 2020
    Assignee: North Inc.
    Inventors: Jörg Pierer, Rony Jose James, Stefan Mohrdiek, Douglas R. Dykaar
  • Patent number: 10571617
    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.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: February 25, 2020
    Assignee: North Inc.
    Inventor: Stefan Alexander
  • Patent number: 10564418
    Abstract: Disclosed herein are devices and methods to provide multiple eyeboxes from multiple input pupils. In particular, a projection system can direct light from multiple input pupils to a holographic optical element. The light of each of the input pupils having light beams of different wavelengths. The holographic optical element reflects at least part of the light of the multiple input pupils to form an array of exit pupils.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: February 18, 2020
    Assignee: North Inc.
    Inventors: Eric Tremblay, Mickael Guillaumee, David Ziegler, Christophe Moser, Lucio Kilcher
  • Patent number: 10553007
    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: February 4, 2020
    Assignee: North inc.
    Inventors: Rachel Kreutzkamp, Ryan Alexander West, Brent Bisaillion, Steven M. Eggert
  • Patent number: 10540743
    Abstract: Techniques to pre-warp an image based on an image warping map comprising a number of cells where each cell corresponds to a polynomial approximation for a number of corresponding pixels to be warped are described. An image warping map can be generated by partitioning a per pixel warping map into cells and approximating the pixel movements of each cell with a polynomial function.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: January 21, 2020
    Assignee: North Inc.
    Inventors: Stanislaw Adaszewski, Patrick McGlew
  • Patent number: 10540589
    Abstract: A system for image quality assessment of non-aligned images includes a first deep path portion of a convolutional neural network having a set of parameters and a second deep path portion of the convolutional neural network sharing a set of parameters with the first deep path convolutional neural network. Weights are shared between the first and second deep path convolutional neural networks to support extraction of a same set of features in each neural network pathway. Non-aligned reference and distorted images are respectively provided to the first and second deep paths of the convolutional neural network for processing. A concatenation layer is connected to both the first and second deep paths convolutional neural network, and a fully connected layer is connected to the concatenation layer to receive input from both the first and second deep paths of the convolutional neural network, generating an image quality assessment as a linear regressor and outputting an image quality score.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: January 21, 2020
    Assignee: DEEP NORTH, INC.
    Inventors: Jinjun Wang, Yudong Liang
  • Patent number: 10539925
    Abstract: Various embodiments are generally directed to techniques for processing holographic recording media. Some embodiments are particularly directed to processing a raw holographic recording medium into an apodized holographic recording medium. For example, a raw holographic recording medium may include a plurality of photosensitive molecules uniformly distributed throughout that are able to record an interference pattern to create a hologram. However, when a photosensitive molecule is desensitized, such as by exposure to incoherent light, its photosensitivity is lost and the molecule may no longer be able to record an interference pattern of coherent light. Various embodiments described herein may include an apodized holographic recording medium that has been exposed to incoherent light in a manner to desensitize some photosensitive molecules therein such that the remaining photosensitive molecules have a non-uniform distribution.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: January 21, 2020
    Assignee: North Inc.
    Inventors: David Ziegler, Mickael Guillaumee, Christophe Moser
  • Patent number: 10539780
    Abstract: According to the present invention there is provided a method of controlling the position of a MEMS mirror in a MEMS device, wherein the MEMS device comprises, a MEMS mirror, a magnet which provides a magnetic field (B), an actuating means which operatively cooperates with the MEMS mirror so that it can apply a force to the MEMS mirror which can tilt the MEMS mirror about at least one rotational axis when the actuating means is provided with a drive signal, wherein the magnitude force applied by the actuating means to the MEMS mirror is dependent on the amplitude of the drive signal, and a detection coil which is mounted on the MEMS mirror, the method comprising the steps of, detecting a change in the resistance (R) of the detection coil so as to detect a change in temperature of the MEMS mirror; determining the drive signal amplitude required to maintain the MEMS mirror at a predefined angular position (?); providing the actuating means with a drive signal which has an amplitude which is equal to the determi
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: January 21, 2020
    Assignee: North Inc.
    Inventors: Martin Lemaire, Thierry Barras, Nicolas Abele
  • Patent number: 10534182
    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.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: January 14, 2020
    Assignee: North Inc.
    Inventors: Stefan Alexander, Jake Chapeskie, Lloyd Frederick Holland, Thomas Mahon
  • Patent number: 10527855
    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.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: January 7, 2020
    Assignee: North Inc.
    Inventors: Stefan Alexander, Douglas Raymond Dykaar, John Otto Vieth, Timothy Paul Bodiya
  • Patent number: 10527856
    Abstract: Systems, devices, and methods for optical engines and laser projectors that are well-suited for use in wearable heads-up displays (WHUDs) are described. Generally, the optical engines of the present disclosure integrate a plurality of laser diodes (e.g., 3 laser diodes, 4 laser diodes) within a single, hermetically or partially hermetically sealed, encapsulated package. The optical engines include an optical director element that includes a curved reflective surface (e.g., parabolic cylinder) that redirects laser light beams and collimates the same along the fast axes thereof. Such optical engines may have various advantages over existing designs including, for example, smaller volumes, better manufacturability, faster modulation speed, etc. WHUDs that employ such optical engines and laser projectors are also described.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: January 7, 2020
    Assignee: North Inc.
    Inventor: Douglas R. Dykaar
  • Patent number: 10516199
    Abstract: A wearable mobile device may include circuitry for transmissive communication, and a slotted cavity radiator in communication with the circuitry for transmissive communication to transmit or receive transmissive communication. In embodiments, the wearable mobile device may further include a pair of conductive faces between which the circuitry for transmissive communication is positioned and that bound a cavity of the slotted cavity radiator.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: December 24, 2019
    Assignee: North Inc.
    Inventors: Jose Rodrigo Camacho Perez, Aycan Erentok, Bryce D. Horine, Brian Girvin
  • Patent number: 10509155
    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.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: December 17, 2019
    Assignee: North Inc.
    Inventor: Stefan Alexander
  • Patent number: 10502870
    Abstract: An optical assembly, and in particular an optical assembly which uses a microlens array or a micromirror array to reduce speckle. It further concerns an optical component which comprises a micromirror array.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: December 10, 2019
    Assignee: North Inc.
    Inventors: Christophe Le Gros, Jonathan Masson, Lucio Kilcher
  • Patent number: 10505338
    Abstract: Systems, devices, and methods for narrow waveband laser diodes are described. The conventional coating on the output facet of a laser diode is replaced with a notch filter coating that is reflective of wavelengths within a narrow waveband around the nominal output wavelength of the laser diode and transmissive of other wavelengths. The notch filter coating ensures the laser diode will lase at the nominal wavelength and not lase for wavelengths outside of the narrow waveband. The notch-filtered laser diode provides a narrow waveband output that is matched to the playback wavelength of at least one hologram in a transparent combiner of a wearable heads-up display, and thereby reduces or eliminates display aberrations that can result from wavelength sensitivity of the playback properties of the hologram.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: December 10, 2019
    Assignee: North Inc.
    Inventor: Douglas R. Dykaar
  • Patent number: 10499023
    Abstract: The present disclosure provides a projection device and manufacturing method, comprising the steps of fixing the positions of a red light source, green light source and blue light source so that the light sources are immovable; providing a mirror which is configured to oscillate such that it can scan light it receives across a display screen; positioning an optical component, which is configured to deflect light, such that it can receive red, green and blue light beams outputted from the red, green and blue light sources respectively; adjusting the optical component such that the optical component compensates for variation between the light sources, in the direction in which the red, green and blue light beams are output from the red, green and blue light sources, so that each of the red, green and blue light beams are directed to the same point on the display screen.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: December 3, 2019
    Assignee: North Inc.
    Inventors: Lucio Kilcher, Nicolas Abele
  • Patent number: 10488662
    Abstract: Systems, articles, and methods that integrate photopolymer film with eyeglass lenses are described. One or more hologram(s) may be recorded into/onto the photopolymer film to enable the lens to be used as a transparent holographic combiner in a wearable heads-up display employing an image source, such as a microdisplay or a scanning laser projector. The methods of integrating photopolymer film with eyeglass lenses include: positioning photopolymer film in a lens mold and casting the lens around the photopolymer film; sandwiching photopolymer film in between two portions of a lens; applying photopolymer film to a concave surface of a lens; and/or affixing a planar carrier (with photopolymer film thereon) to two points across a length of a concave surface of a lens. Respective lenses manufactured/adapted by each of these processes are also described.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: November 26, 2019
    Assignee: North Inc.
    Inventors: Lloyd Frederick Holland, Matthew Bailey