Patents Assigned to Microvision, Inc.
  • Patent number: 11536952
    Abstract: A light detection and ranging system includes synchronously scanning transmit and receive mirrors that scan a pulsed fanned laser beam in two dimensions. Imaging optics image a receive aperture onto an arrayed receiver that includes a plurality of light sensitive devices. Scanning mirror assemblies include stationary permanent magnets and MEMS devices with attached mirrors and conductive coils.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: December 27, 2022
    Assignee: Microvision, Inc.
    Inventor: Ellis Matthew
  • Patent number: 11525896
    Abstract: A light detection and ranging system includes synchronously scanning transmit and receive mirrors that scan a pulsed fanned laser beam in two dimensions. Imaging optics image a receive aperture onto an arrayed receiver that includes a plurality of light sensitive devices. Scanning mirror assemblies include stationary coils and MEMS devices with attached mirrors and permanent magnets.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: December 13, 2022
    Assignee: Microvision, Inc.
    Inventor: Matthew Ellis
  • Publication number: 20220390569
    Abstract: The embodiments described herein provide systems and methods that can improve performance in scanning laser devices. Specifically, the systems and methods utilize a non-uniform variation in optical expansion coupled with variation in the energy level of laser light pulses to provide an improved effective range over a scanning area. In general, the improved effective range varies over the scan field, with relatively long effective range in some areas of the scan field and relatively short effective range in other areas of the scan field. This varying range over the scan field is facilitated by expansion optics that provide a non-uniform variation in optical expansion for laser light pulses relative to position along a first axis in the scan field and by a light source controller that varies the energy level of the laser light pulses according to position along the first axis of the scan field.
    Type: Application
    Filed: June 3, 2021
    Publication date: December 8, 2022
    Applicant: Microvision, Inc.
    Inventors: Henry J. Baron, Alga Lloyd Nothern, III, Christopher Brian Adkins, Jonathan A. Morarity
  • Patent number: 11513341
    Abstract: The embodiments described herein include scanners that can provide improved scanning laser devices. Specifically, the embodiments described herein provide scanners with a modular construction that includes one or more separately formed piezoelectric actuators coupled to a microelectromechanical system (MEMS) scan plate, flexure structures, and scanner frame. Such modular scanners can provide improved scanning laser devices, including scanning laser projectors and laser depth scanners, LIDAR systems, 3D motion sensing devices, gesture recognition devices, etc.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: November 29, 2022
    Assignee: Microvision, Inc.
    Inventor: Matthew Ellis
  • Patent number: 11480660
    Abstract: A light detection and ranging system includes multiple scanning mirror assemblies to increase a receive aperture. The multiple scanning mirror assemblies are controlled to mimic the operation of one large scanning mirror. The multiple scanning mirror assemblies may be arranged in one-dimensional arrays or two-dimensional arrays. Two arrays of scanning mirror assemblies provide for scanning in two dimensions.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: October 25, 2022
    Assignee: Microvision, Inc.
    Inventors: Matthew Ellis, Jonathan A. Morarity, Alga Lloyd Nothern, III
  • Publication number: 20220244358
    Abstract: The embodiments described herein provide systems and methods that can facilitate increased detector sensitivity and reliability in a scanning laser device. Specifically, the systems and methods utilize detectors with multiple sensors that are configured to receive reflections of laser light pulses from objects within a scan field. These multiple sensors are configured to receive these reflections through the same optical assembly used to scan the laser light pulses out to the scan field. Furthermore, the multiple sensors are configured to at least partially cancel the effects of back reflections from within the optical assembly itself. The cancellation of the effects of back reflections from within the optical assembly can improve the sensitivity of the detector, particularly for the detection of low energy reflections of laser pulses from within the scan field.
    Type: Application
    Filed: February 2, 2021
    Publication date: August 4, 2022
    Applicant: Microvision, Inc.
    Inventors: James Dean, Christopher Cannon, Alga Lloyd Nothern, III, Joel Sandgathe
  • Patent number: 11402476
    Abstract: A light detection and ranging system modulates laser light pulses with a channel signature to encode transmitted pulses with channel information. The modulated laser light pulses may be scanned into a field of view. Received reflections not modulated with the same channel signature are rejected. Multiple light pulses of different wavelengths may be similarly or differently modulated.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: August 2, 2022
    Assignee: Microvision, Inc.
    Inventors: Jonathan A. Morarity, Christopher Brian Adkins
  • Patent number: 11397317
    Abstract: A scanning laser projection system includes a virtual protective housing circuit to automatically reduce power levels of visible laser light pulses when necessary to render the laser projection system eye-safe. IR laser light pulses are scanned out in front of visible laser light pulses in a field of view, and emitted power of visible laser light pulses is modulated based on attributes of reflections of the IR laser light pulses.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: July 26, 2022
    Assignee: Microvision, Inc.
    Inventors: Jonathan Cross, Christopher Brian Adkins
  • Patent number: 11287644
    Abstract: A mechanically resonant system exhibits a resonant mode frequency response. A conductor is included on a resonant member within the mechanically resonant system. A current in the conductor causes a modification of the resonant mode frequency response when in the presence of a magnetic field. The modification of the resonant mode frequency response may include an offset in the natural frequency of the mechanically resonant system.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: March 29, 2022
    Assignee: Microvision, Inc.
    Inventors: Jonathan A. Morarity, Matthew Ellis, Christopher Brian Adkins
  • Patent number: 11163042
    Abstract: A scanning display system includes two detectors for rangefinding. Round trip times-of-flight are measured for reflections of laser pulses received at the detectors. A proportional correction factor is determined based at least in part on the geometry of the scanning display system. The proportional correction factor is applied to the measured times-of-flight to create estimates of more accurate times-of-flight.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: November 2, 2021
    Assignee: Microvision, Inc.
    Inventors: Bin Xue, P. Selvan Viswanathan, Robert James Jackson, George Thomas Valliath
  • Patent number: 11137498
    Abstract: A scanning rangefinding system includes a MEMS device with a scanning mirror that sweeps a beam in two dimensions. Actuating circuits receive angular extents and offset information and provide signal stimulus to the MEMS device to control the amount and direction of mirror deflection on two axes. The scan angle and offset information may be modified to create a repeating pattern of different fields of view.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: October 5, 2021
    Assignee: Microvision, Inc.
    Inventors: Jari Honkanen, P. Selvan Viswanathan, Robert James Jackson
  • Patent number: 11092679
    Abstract: Laser light pulses of at least two different wavelengths are reflected off a scanning mirror. A first time-of-flight distance measurement circuit receives reflected light pulses of a first wavelength and determines distances. A second time-of-flight distance measurement circuit receives reflected light pulses of a second wavelength and determines distances. The timing of transmission of laser light pulses of differing wavelengths are adjusted, and the data buffering of converted return pulses are adjusted, to compensate for laser light source misalignment.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: August 17, 2021
    Assignee: Microvision, Inc.
    Inventors: Henry J. Baron, Phillip R. Kent
  • Patent number: 11002855
    Abstract: A projection system emits light pulses in a field of view and measures properties of reflections. Properties may include time of flight and return amplitude. Foreground objects and background surfaces are distinguished, distances between foreground objects and background surfaces are determined based on reflections that are occluded by the foreground objects and other properties of the projection system.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: May 11, 2021
    Assignee: Microvision, Inc.
    Inventors: Patrick J. McVittie, P. Selvan Viswanathan, Jonathan A. Morarity
  • Patent number: 10935640
    Abstract: A scanning light detection and ranging (LIDAR) system includes a scanning apparatus that scans laser light pulses sinusoidally in a vertical direction, and quasi-statically through angular extents in a horizontal direction. Multiple light sensors, each with a substantially nonoverlapping field of view, are multiplexed during the scan of the laser light pulses. Multiple scanning LIDAR systems may be combined to increase the effective horizontal angular extents.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: March 2, 2021
    Assignee: Microvision, Inc.
    Inventor: Robert James Jackson
  • Patent number: 10871569
    Abstract: Laser light pulses of at least two different wavelengths are reflected off a scanning mirror. A first time-of-flight distance measurement circuit receives reflected light pulses of a first wavelength and determines distances. A second time-of-flight distance measurement circuit receives reflected light pulses of a second wavelength and determines distances. The laser light pulses of different wavelengths may be interleaved in time to increase resolution. The laser light pulses of different wavelengths may also be used for detecting safety violations and/or power control.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: December 22, 2020
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Bin Xue
  • Patent number: 10859704
    Abstract: Laser light pulses of at least two different wavelengths are reflected off a scanning mirror. A first time-of-flight distance measurement circuit receives reflected light pulses of a first wavelength and determines distances. A second time-of-flight distance measurement circuit receives reflected light pulses of a second wavelength and determines distances. The laser light pulses of different wavelengths may be interleaved in time to increase resolution. The laser light pulses of different wavelengths may also be used for detecting safety violations and/or power control.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: December 8, 2020
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Bin Xue
  • Patent number: 10845469
    Abstract: Devices and methods are described that provide for scanning surfaces and generating 3-dimensional point clouds that describe the depth of the measured surface at each point. In general, the devices and methods utilize. Specifically, the depth mapping devices and methods utilize multiple receiver channels, with each receiver channel configured to have a different effective sensing range. These multiple receiver channels together provide the depth mapping device with an increased overall effective sensing range. Thus, the depth mapping device can effectively map surfaces that are closer and/or farther than could be mapped using only one receiver channel.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: November 24, 2020
    Assignee: Microvision, Inc.
    Inventors: Jari Honkanen, Robert James Jackson
  • Patent number: 10831019
    Abstract: An angular velocity correcting optical device receives a sinusoidally swept input light beam and outputs a non-sinusoidally swept output beam. The output beam may have a constant angular velocity. The output beam may have a constant pitch on a target surface for a constant periodicity pulsed light beam. Optical surfaces may be freeform surfaces specified by polynomials.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: November 10, 2020
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Matthieu Saracco, Roger F. Johnson, Ian Blanch
  • Patent number: 10761188
    Abstract: A projection system emits light pulses in a field of view and measures properties of reflections. Properties may include time of flight and return amplitude. Foreground objects and background surfaces are distinguished, distances between foreground objects and background surfaces are determined based on reflections that are occluded by the foreground objects and other properties of the projection system.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: September 1, 2020
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Jonathan A. Morarity, Alga Lloyd Nothern, III, Bin Xue
  • Patent number: 10742942
    Abstract: Devices and methods are described herein to measure optical power in scanning laser projectors. In general, the devices and methods utilize a polarizing component and photodiode to measure optical power being generated by at least one laser light source. The polarizing component is configured to polarize at least a portion of the laser beam in a way that improves the accuracy and consistency of this optical power measurement. Specifically, the polarizing component filters at least a portion of the laser beam for one polarization state in a way that facilitates improved reliability in the amount of laser light directed into the photodiode.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: August 11, 2020
    Assignee: Microvision, Inc.
    Inventors: Matthieu Saracco, Alga Lloyd Nothern, III, Thomas Byeman