Patents by Inventor Michael Ramsey

Michael Ramsey 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).

  • Publication number: 20210104209
    Abstract: A control system for a switchable privacy display apparatus comprises an ambient light sensor and a display luminance controller arranged to control the luminance of the display in response to measured illuminance. High image visibility is provided for public mode operation while in privacy mode visual security level above a perceived privacy threshold may be obtained by means of control of image luminance, in response to the output of the ambient light sensor.
    Type: Application
    Filed: October 1, 2020
    Publication date: April 8, 2021
    Inventors: Graham J. Woodgate, Jonathan Harrold, Michael G. Robinson, Robert A. Ramsey
  • Publication number: 20210090205
    Abstract: The address of the draw or dispatch packet responsible for creating an exception is tied to a shader/wavefront back to the draw command from which it originated. In various embodiments, a method of operating a graphics pipeline and exception handling includes receiving, at a command processor of a graphics processing unit (GPU), an exception signal indicating an occurrence of a pipeline exception at a shader stage of a graphics pipeline. The shader stage generates an exception signal in response to a pipeline exception and transmits the exception signal to the command processor. The command processor determines, based on the exception signal, an address of a command packet responsible for the occurrence of the pipeline exception.
    Type: Application
    Filed: September 24, 2019
    Publication date: March 25, 2021
    Inventors: Michael MANTOR, Alexander Fuad ASHKAR, Randy RAMSEY, Mangesh P. NIJASURE, Brian EMBERLING
  • Publication number: 20210069711
    Abstract: A fluidic device includes a plurality of reaction wells, typically in a dense array, with at least one bead retention segment in fluid communication with and spatially separated from at least one signal detection segment. A respective bead retention segment can be configured to hold a single bead, which can have a reagent attached thereto.
    Type: Application
    Filed: November 6, 2020
    Publication date: March 11, 2021
    Inventors: John Michael Ramsey, William Hampton Henley
  • Publication number: 20210064366
    Abstract: An apparatus such as a graphics processing unit (GPU) includes a plurality of processing elements configured to concurrently execute a plurality of first waves and accumulators associated with the plurality of processing elements. The accumulators are configured to store accumulated values representative of behavioral characteristics of the plurality of first waves that are concurrently executing on the plurality of processing elements. The apparatus also includes a dispatcher configured to dispatch second waves to the plurality of processing elements based on comparisons of values representative of behavioral characteristics of the second waves and the accumulated values stored in the accumulators. In some cases, the behavioral characteristics of the plurality of first waves comprise at least one of fetch bandwidths, usage of an arithmetic logic unit (ALU), and number of export operations.
    Type: Application
    Filed: August 30, 2019
    Publication date: March 4, 2021
    Inventors: Randy RAMSEY, William David ISENBERG, Michael MANTOR
  • Publication number: 20210060564
    Abstract: Embodiments of the invention provide fluidic devices such as, but not limited to, microfluidic chips, with one or more freeze thaw valves (FTVs) employing one or more ice-nucleating agents (INAs), that can reliably operate to freeze at relatively higher temperatures and/or at faster rates than conventional microfluidic devices with FTV systems.
    Type: Application
    Filed: November 6, 2020
    Publication date: March 4, 2021
    Inventors: John Michael Ramsey, William Hampton Henley, Joseph Carl Gaiteri
  • Patent number: 10937640
    Abstract: A miniature electrode apparatus is disclosed for trapping charged particles, the apparatus includes, along a longitudinal direction, a first end cap electrode, a central electrode having an aperture, and a second end cap electrode. The aperture is elongated in the lateral plane and extends through the central electrode along the longitudinal direction and the central electrode surrounds the aperture in a lateral plane perpendicular to the longitudinal direction to define a transverse cavity for trapping charged particles. Electric fields can be applied in a y-direction of the lateral plane across one or more planes perpendicular to the longitudinal axis to translocate and/or manipulate ion trajectories.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: March 2, 2021
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: John Michael Ramsey, Andrew Hampton, Kevin Schultze
  • Publication number: 20210041619
    Abstract: An imaging directional backlight apparatus includes a waveguide and light source array for providing large area directed illumination from localized light sources. The waveguide may include a stepped structure in which steps may include extraction features optically hidden to guided light, propagating in a forward direction. Returning light propagating in a backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Viewing windows are formed through imaging individual light sources and defines the relative positions of system elements and ray paths. Alignment of the waveguide to mechanical and optical components may be provided by surface relief features of the waveguide arranged in regions adjacent the input surface and intermediate the light emitting regions of the light sources.
    Type: Application
    Filed: June 30, 2020
    Publication date: February 11, 2021
    Inventors: Benjamin Ihas, Michael G. Robinson, Robert Ramsey
  • Publication number: 20210033898
    Abstract: A switchable privacy display apparatus comprises a spatial light modulator, a light control film, and a polar control retarder that comprises plural retarders arranged between a display polariser of the spatial light modulator and an additional polariser. The display achieves high image visibility to an off-axis user in a public mode of operation and high image security to an off-axis snooper in privacy mode of operation.
    Type: Application
    Filed: July 31, 2020
    Publication date: February 4, 2021
    Inventors: Graham J. Woodgate, Michael G. Robinson, Jonathan Harrold, Robert A. Ramsey, Ben Ihas
  • Publication number: 20210026170
    Abstract: A switchable directional display apparatus comprises a spatial light modulator and a backlight comprising a waveguide, two light sources arranged to provide illumination through the edge of the waveguide and a switchable liquid crystal retarder. The light sources and switchable liquid crystal retarder may be controlled to provide a first operating state with a narrow field of view and a second operating state with a wide field of view. Image visibility in wide angle mode of operation may be maximised while visual security level may be maximised in a narrow angle mode of operation, to provide an efficient privacy mode of operation.
    Type: Application
    Filed: September 14, 2018
    Publication date: January 28, 2021
    Inventors: Michael G. Robinson, Graham J. Woodgate, Robert A. Ramsey, Jonathan Harrold
  • Publication number: 20210018783
    Abstract: A privacy display comprises a spatial light modulator and a compensated switchable liquid crystal retarder arranged between first and second polarisers arranged in series with the spatial light modulator. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without loss, whereas off-axis light has reduced luminance. The visibility of the display to off-axis snoopers is reduced by means of luminance reduction over a wide polar field. In a wide angle mode of operation, the switchable liquid crystal retardance is adjusted so that off-axis luminance is substantially unmodified.
    Type: Application
    Filed: October 6, 2020
    Publication date: January 21, 2021
    Applicant: RealD Spark, LLC
    Inventors: Michael G. Robinson, Graham J. Woodgate, Robert A. Ramsey, Jonathan Harrold
  • Publication number: 20210018773
    Abstract: A switchable privacy display comprises an emissive SLM, a parallax barrier, a switchable LC retarder, and passive retarders arranged between parallel output polarisers. In privacy mode, on-axis light from the SLM is directed without loss, whereas the parallax barrier and retarder layers cooperate to increase the VSL to off-axis snoopers. The display may be rotated to achieve privacy operation in landscape and portrait orientations. In public mode, the LC retardance is adjusted so that off-axis luminance is increased so that the image visibility is increased for multiple users. The display may also switch between day-time and night-time operation, for example for use in an automotive environment. A low reflectivity emissive display for use in ambient illumination comprises a SLM with emissive pixels, an absorptive parallax barrier and a high spectral leakage optical isolator. Head-on light from the pixels is directed with increased transmission efficiency while ambient light is strongly absorbed.
    Type: Application
    Filed: July 2, 2020
    Publication date: January 21, 2021
    Inventors: Graham J. Woodgate, Michael G. Robinson, Jonathan Harrold, Robert A. Ramsey
  • Publication number: 20210018782
    Abstract: A privacy display comprises a spatial light modulator and a compensated switchable liquid crystal retarder arranged between first and second polarisers arranged in series with the spatial light modulator. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without loss, whereas off-axis light has reduced luminance. The visibility of the display to off-axis snoopers is reduced by means of luminance reduction over a wide polar field. In a wide angle mode of operation, the switchable liquid crystal retardance is adjusted so that off-axis luminance is substantially unmodified.
    Type: Application
    Filed: October 6, 2020
    Publication date: January 21, 2021
    Inventors: Michael G. Robinson, Graham J. Woodgate, Robert A. Ramsey, Jonathan Harrold
  • Patent number: 10870111
    Abstract: A fluidic device includes a plurality of reaction wells, typically in a dense array, with at least one bead retention segment in fluid communication with and spatially separated from at least one signal detection segment. A respective bead retention segment can be configured to hold a single bead, which can have a reagent attached thereto.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: December 22, 2020
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: John Michael Ramsey, William Hampton Henley
  • Patent number: 10867781
    Abstract: An electrospray ionization (ESI)-mass spectrometer analysis systems include an ESI device with at least one emitter configured to electrospray ions and a mass spectrometer in fluid communication with the at least one emitter of the ESI device. The mass spectrometer includes a mass analyzer held in a vacuum chamber. The vacuum chamber is configured to have a high (background/gas) pressure of about 50 mTorr or greater during operation. During operation, the ESI device is configured to either; (a) electrospray ions into a spatial region external to the vacuum chamber and at atmospheric pressure, the spatial extent being adjacent to an inlet device attached to the vacuum chamber, the inlet device intakes the electrosprayed ions external to the vacuum chamber with the mass analyzer and discharges the ions into the vacuum chamber with the mass analyzer; or (b) electrospray ions directly into the vacuum chamber with the mass analyzer.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: December 15, 2020
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: John Michael Ramsey, William McKay Gilliland, Jr.
  • Patent number: 10864520
    Abstract: Embodiments of the invention provide fluidic devices such as, but not limited to, microfluidic chips, with one or more freeze thaw valves (FTVs) employing one or more ice-nucleating agents (INAs), that can reliably operate to freeze at relatively higher temperatures and/or at faster rates than conventional microfluidic devices with FTV systems.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: December 15, 2020
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: John Michael Ramsey, William Hampton Henley, Joseph Carl Gaiteri
  • Patent number: 10861689
    Abstract: Methods, systems and devices that generate differential axial transport in a fluidic device having at least one fluidic sample separation flow channel and at least one ESI emitter in communication with the at least one sample separation flow channel. In response to the generated differential axial transport, the at least one target analyte contained in a sample reservoir in communication with the sample separation channel is selectively transported to the at least one ESI emitter while inhibiting transport of contaminant materials contained in the sample reservoir toward the at least one ESI emitter thereby preferentially directing analyte molecules out of the at least one ESI emitter. The methods, systems and devices are particularly suitable for use with a mass spectrometer.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: December 8, 2020
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: John Scott Mellors, John Michael Ramsey, Nicholas George Batz
  • Publication number: 20200342480
    Abstract: Embodiments of the present invention disclose a method, a computer program product, and a system for informing collectors the locations of houses participating in a collecting event and safely transferring prizes to the collectors. Embodiments of the present invention can be used to receive registration corresponding to each player of a plurality of players, determine a set of active players and a set of inactive players among the plurality of players, determine a transfer request of a prize between a collector and an active player among the set of active players, and execute a transfer based on the determined transfer request.
    Type: Application
    Filed: December 13, 2019
    Publication date: October 29, 2020
    Inventors: MICHAEL RAMSEY, MICHAEL SCOTT FROST
  • Publication number: 20200333645
    Abstract: A privacy display comprises a liquid crystal spatial light modulator, a switchable retarder and a passive compensation retarder arranged between a pair of polarisers. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without change of image contrast, whereas off-axis light has reduced contrast to reduce the visibility of the display to off-axis snoopers over a wide polar angular range. In a wide angle mode of operation, the retardance of the switchable retarder is adjusted so that off-axis contrast is substantially unmodified.
    Type: Application
    Filed: November 5, 2018
    Publication date: October 22, 2020
    Inventors: Michael G. Robinson, Graham J. Woodgate, Jonathan Harrold, Robert A Ramsey, Ben Ihas
  • Publication number: 20200315807
    Abstract: A stemless implant for shoulder arthroplasty includes a body having a proximal portion, distal portion, and an outer surface. A cylindrical extrusion is substantially perpendicular to and adjacent the proximal portion. At least a portion of the outer surface is configured to contact bone, the outer bone contacting surface comprising a concave taper. The stemless implant can be sized and shaped for insertion into a metaphysis of a humerus bone without penetrating a diaphysis of the humerus bone. The implant optionally comprises a medial fin, a lateral fin, an anterior fin, and a posterior fin. The medial fin and lateral fin may be thicker than the anterior fin. The fins may taper from the proximal portion to the distal portion.
    Type: Application
    Filed: June 22, 2020
    Publication date: October 8, 2020
    Inventors: Armodios M. Hatzidakis, Heinz R. Hoenecke, JR., Scott R. Jacobson, James D. Kelly, II, Drew Miller, Nathaniel E. Skinner, Charlie M. Jobin, Brent A. Ponce, Michael T. Freehill, Matthews Ramsey, Jean-Marie Berger, Edwards Rhettson Hobgood
  • Patent number: 10788710
    Abstract: A privacy display comprises a spatial light modulator and a compensated switchable liquid crystal retarder arranged between first and second polarisers arranged in series with the spatial light modulator. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without loss, whereas off-axis light has reduced luminance. The visibility of the display to off-axis snoopers is reduced by means of luminance reduction over a wide polar field. In a wide angle mode of operation, the switchable liquid crystal retardance is adjusted so that off-axis luminance is substantially unmodified.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: September 29, 2020
    Assignee: RealD Spark, LLC
    Inventors: Michael G. Robinson, Graham J. Woodgate, Robert A. Ramsey, Jonathan Harrold