Patents by Inventor Kai ZANG

Kai ZANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10802220
    Abstract: An integrated optical beam steering system is configured in three stages to provide beam steering for image light from an imager (e.g., laser, light emitting diode, or other light source) to downstream elements in a display system such as an exit pupil expander (EPE) in a mixed-reality computing device. The first stage includes a multi-level cascaded array of optical switches that are configurable to spatially route image light over a first dimension of a two-dimensional (2D) field of view (FOV) of the display system. The second waveguiding stage transfers the image light along preformed waveguides to a collimator in the third stage which is configured to collimate the image light along the first dimension of the FOV (e.g., horizontal). The waveguiding and collimating stages may be implemented using lightweight photonic crystal nanostructures.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: October 13, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Joshua Owen Miller, Kai Zang, Wyatt Owen Davis, Mohammadamin Eftekhar
  • Publication number: 20200310030
    Abstract: An integrated optical beam steering system is configured in three stages to provide beam steering for image light from an imager (e.g., laser, light emitting diode, or other light source) to downstream elements in a display system such as an exit pupil expander (EPE) in a mixed-reality computing device. The first stage includes a multi-level cascaded array of optical switches that are configurable to spatially route image light over a first dimension of a two-dimensional (2D) field of view (FOV) of the display system. The second waveguiding stage transfers the image light along preformed waveguides to a collimator in the third stage which is configured to collimate the image light along the first dimension of the FOV (e.g., horizontal). The waveguiding and collimating stages may be implemented using lightweight photonic crystal nanostructures.
    Type: Application
    Filed: June 19, 2019
    Publication date: October 1, 2020
    Inventors: Joshua Owen MILLER, Kai ZANG, Wyatt Owen DAVIS, Mohammadamin EFTEKHAR
  • Publication number: 20200227901
    Abstract: It comprises a receptacle subassembly, a lid subassembly telescopically interacting with the receptacle subassembly by partially penetrating into or by retracting from the receptacle subassembly and a magnetic unit attached to the receptacle subassembly and to the lid subassembly and intended to align and interlock the receptacle subassembly with the lid subassembly; the lid subassembly incorporating supplementarily an optionally detachable frame unit, intended to cover an unaesthetic transitional zone between a contour of the enclosure assembly and a wall opening wherein the enclosure assembly is installed.
    Type: Application
    Filed: April 18, 2018
    Publication date: July 16, 2020
    Applicant: PRIMEX MANUFACTURING LTD.
    Inventors: Hong Chen, Nathan Cheng, Christian Guckel, Donovan Hammersley, Balin Lee, Kai Zang
  • Patent number: 10635168
    Abstract: A light sensing circuit includes a photomultiplier in electrical communication with an array of capacitors or resistors. Each capacitor or resistor in the array having an associated switch and having a capacitance or resistance different from every other capacitor or resistor in the array. Each switch has an open state and a closed state, thus enabling each capacitor or resistor to be placed in electrical communication with the photomultiplier or be isolated from the photomultiplier. The switchable array may be in electrical communication with an analog to digital converter (ADC) or a transimpedance amplifier (TIA). The switchable array allows the ADC or TIA to be sensitive to low value signals and operate at a large dynamic range and operate at a fast rate.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: April 28, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Raymond Kirk Price, Kai Zang
  • Patent number: 10627899
    Abstract: Eye tracking system for use in a visible light display device incorporates and/or use one or more silicon photomultiplier (SiPM) sensor and an infrared module of a microelectromechanical (MEMs)-based scanner. The infrared module emits a beam of photons, where at least some of the photons are directed towards a user's eye while the eye tracking system is being used. The SiPM sensor(s) capture a reflection that emanates off of the user's eye.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: April 21, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Raymond Kirk Price, Kai Zang, Gregory Theodore Gibson
  • Publication number: 20200099194
    Abstract: Multi-section laser systems are configured with a gain/modulation section and a pre-bias section. Both sections are electrically connected to a diode laser resonator and both sections are independently controllable via laser driver circuitry. The multi-section laser can be used to provide pulsing optimizations that include reducing the turn-on delay of the laser while also ensuring that the resulting laser light's spectral linewidth satisfies a threshold linewidth requirement. During use, a pre-bias current is applied to the pre-bias section. This current causes some photons to be spontaneously emitted. During this time, a gain current is refrained from being applied to the gain section until the resonator is seeded with a spectrum of photons from the pre-bias section. Once the resonator is sufficiently seeded, the gain current is applied to the gain section, thereby producing a seeded pulse of laser light having a desired spectral linewidth.
    Type: Application
    Filed: September 25, 2018
    Publication date: March 26, 2020
    Inventors: Raymond Kirk Price, Christopher Francis Reidy, Kai Zang
  • Patent number: 10551914
    Abstract: Eye tracking system incorporates and/or uses one or more silicon photomultiplier (SiPM) sensor and an infrared module of a microelectromechanical (MEMs)-based scanner. The infrared module emits a beam of photons, where at least some of the photons are directed towards a user's eye while the eye tracking system is being used. The SiPM sensor(s) capture a reflection that emanates off of the user's eye.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: February 4, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Raymond Kirk Price, Kai Zang, Gregory Theodore Gibson
  • Publication number: 20190372306
    Abstract: Systems and methods are provided for controlling and/or modifying operation of a red, green, blue (RGB) laser assembly for creating images in mixed-reality environments. Initially, the lasers in the RGB laser assembly operate in a low power or non-emitting state. Then, the lasers emit laser light to illuminate a pixel or a group of pixels. This illumination occurs for a period of time spanning less than 15 nanoseconds. By causing the lasers to emit laser light only during this short period of time, the resulting laser light is structured with a reduced spatial coherence level. Once the time period elapses, then the lasers again return to the non-emitting state. This process repeats for each pixel such that the lasers generate pulsed emissions. By operating the lasers with a reduced spatial coherence, undesired visual artifacts can be reduced or eliminated within the target display area.
    Type: Application
    Filed: December 21, 2018
    Publication date: December 5, 2019
    Inventors: Christopher Francis Reidy, Shiva Shahin, Kai Zang, Raymond Kirk Price
  • Publication number: 20190305018
    Abstract: Optimizations are provided for a high dynamic range (HDR) sensor. This sensor is a spatially multiplexed image sensor that includes at least two sets of red, green, and blue (RGB) pixels. Each red pixel in the second set of RGB pixels is positioned proximately and sometimes, adjacently, to at least one red pixel in the first set of RGB pixels. Each green pixel in the second set of RGB pixels is positioned proximately to at least one green pixel in the first set of RGB pixels. Each blue pixel in the second set of RGB pixels is positioned proximately to at least one blue pixel in the first set of RGB pixel. This spatially multiplexed image sensor is able to generate a digital image with reduced motion blurring artifacts.
    Type: Application
    Filed: April 2, 2018
    Publication date: October 3, 2019
    Inventors: Raymond Kirk Price, Kai Zang, Michael Bleyer
  • Publication number: 20190250703
    Abstract: Eye tracking system incorporates and/or uses one or more silicon photomultiplier (SiPM) sensor and an infrared module of a microelectromechanical (MEMs)-based scanner. The infrared module emits a beam of photons, where at least some of the photons are directed towards a user's eye while the eye tracking system is being used. The SiPM sensor(s) capture a reflection that emanates off of the user's eye.
    Type: Application
    Filed: February 9, 2018
    Publication date: August 15, 2019
    Inventors: Raymond Kirk Price, Kai Zang, Gregory Theodore Gibson
  • Publication number: 20190250704
    Abstract: Eye tracking system for use in a visible light display device incorporates and/or use one or more silicon photomultiplier (SiPM) sensor and an infrared module of a microelectromechanical (MEMs)-based scanner. The infrared module emits a beam of photons, where at least some of the photons are directed towards a user's eye while the eye tracking system is being used. The SiPM sensor(s) capture a reflection that emanates off of the user's eye.
    Type: Application
    Filed: February 9, 2018
    Publication date: August 15, 2019
    Inventors: Raymond Kirk Price, Kai Zang, Gregory Theodore Gibson
  • Patent number: 10345519
    Abstract: An integrated optical beam steering system includes a photonic crystal nanostructure having a plurality of nanoelements, an input surface to receive light from an imager, and a concave output surface which maintains a desired field of view with suitable coupling efficiency. Parameters of the nanoelements are configured to give rise to a photonic bandgap for a predetermined range of wavelengths. Waveguides are disposed in the nanostructure which comprise negative space formed by the absence of nanoelements and are employed to generate a propagating band within the photonic bandgap. The respective waveguides have inputs disposed on the input surfaces of the nanostructure where light propagates in a respective waveguide in total internal reflection. The respective waveguides further have outputs that have paths with curved portions located in the nanostructure and the outputs are configured normal to the concave output surface.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: July 9, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Joshua Owen Miller, Kai Zang, Wyatt Owen Davis, Mohammadamin Eftekhar
  • Publication number: 20190140437
    Abstract: It comprises a receptacle subassembly, a lid subassembly telescopically interacting with the receptacle subassembly by partially penetrating into or by retracting from the receptacle subassembly and a magnetic unit attached to the receptacle subassembly and to the lid subassembly and intended to align and interlock the receptacle subassembly with the lid subassembly; the lid subassembly incorporating supplementarily an optionally detachable frame unit, intended to cover an unaesthetic transitional zone between a contour of the enclosure assembly and a wall opening wherein the enclosure assembly is installed.
    Type: Application
    Filed: April 18, 2018
    Publication date: May 9, 2019
    Applicant: PRIMEX MANUFACTURING LTD.
    Inventors: Hong Chen, Nathan Cheng, Christian Guckel, Donovan Hammersley, Balm Lee, Kai Zang
  • Publication number: 20190064922
    Abstract: A light sensing circuit includes a photomultiplier in electrical communication with an array of capacitors or resistors. Each capacitor or resistor in the array having an associated switch and having a capacitance or resistance different from every other capacitor or resistor in the array. Each switch has an open state and a closed state, thus enabling each capacitor or resistor to be placed in electrical communication with the photomultiplier or be isolated from the photomultiplier. The switchable array may be in electrical communication with an analog to digital converter (ADC) or a transimpedance amplifier (TIA). The switchable array allows the ADC or TIA to be sensitive to low value signals and operate at a large dynamic range and operate at a fast rate.
    Type: Application
    Filed: August 22, 2017
    Publication date: February 28, 2019
    Inventors: Raymond Kirk PRICE, Kai ZANG