Patents by Inventor John D. Perreault

John D. Perreault 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: 11973926
    Abstract: An autostereoscopic display system includes a transmissive display panel including a backlight having an array of backlight pixels, a selectively-selectively-transmissive display pixel matrix having a first side facing the backlight and an opposing second side, the selectively-transmissive display pixel matrix comprising an array of display pixels, a first lenticular array disposed between the backlight and the first side of the selectively-transmissive display pixel matrix, and a second lenticular array disposed facing the second side of the selectively-transmissive display pixel matrix. The backlight is configured to separately activate different subsets of the backlight pixels such that light emitted from an activated subset of backlight pixels and transmitted through the first lenticular array, the selectively-transmissive display pixel matrix, and the second lenticular array is emitted by the display panel as display light in a corresponding separate direction relative to the display panel.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: April 30, 2024
    Assignee: GOOGLE LLC
    Inventors: John D. Perreault, Andrew Huibers
  • Patent number: 11887550
    Abstract: A display system including a tracking subsystem configured to track one of a pose of a head of a viewer or a pose of an eye of the viewer. The display system further includes an image correction module configured to, for each pixel of at least a subset of pixels of an input image, determine a pixel view angle for the pixel based on the pose of the head or the pose of the eye, determine a corrected pixel value based on an input pixel value of the pixel in the input image and based on the pixel view angle; and provide the corrected pixel value for the pixel in an angle-corrected image corresponding to the input image. The display system further includes a display panel to display the angle-corrected image.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: January 30, 2024
    Assignee: GOOGLE LLC
    Inventors: Patrick Llull, John D. Perreault, Andrew Huibers
  • Publication number: 20220400245
    Abstract: An autostereoscopic display system includes a transmissive display panel including a backlight having an array of backlight pixels, a selectively-selectively-transmissive display pixel matrix having a first side facing the backlight and an opposing second side, the selectively-transmissive display pixel matrix comprising an array of display pixels, a first lenticular array disposed between the backlight and the first side of the selectively-transmissive display pixel matrix, and a second lenticular array disposed facing the second side of the selectively-transmissive display pixel matrix. The backlight is configured to separately activate different subsets of the backlight pixels such that light emitted from an activated subset of backlight pixels and transmitted through the first lenticular array, the selectively-transmissive display pixel matrix, and the second lenticular array is emitted by the display panel as display light in a corresponding separate direction relative to the display panel.
    Type: Application
    Filed: March 2, 2021
    Publication date: December 15, 2022
    Inventors: John D. Perreault, Andrew Huibers
  • Publication number: 20220337807
    Abstract: Techniques of crosstalk compensation include performing a crosstalk measurement operation on each of a plurality of cells of a display to produce a plurality of crosstalk measurement, and then in response to detecting an observer in a field of view (FOV) of the display, performing a crosstalk compensation operation on each of the plurality of cells to reduce crosstalk to below a perceptual threshold of the observer. Each cell produces luminance over a series of repeat zones, with each repeat zone being a left or right channel and the repeat zones alternating these channels. A computer may measure the crosstalk by analyzing the values of the luminance over phase within each repeat zone. In some implementations, each cell is associated with a lookup table of crosstalk values. When an observer is detected in the FOV of the display, the computer performs a crosstalk compensation operation using the measured luminance values.
    Type: Application
    Filed: April 15, 2021
    Publication date: October 20, 2022
    Inventor: John D. Perreault
  • Publication number: 20220319453
    Abstract: A display system including a tracking subsystem configured to track one of a pose of a head of a viewer or a pose of an eye of the viewer. The display system further includes an image correction module configured to, for each pixel of at least a subset of pixels of an input image, determine a pixel view angle for the pixel based on the pose of the head or the pose of the eye, determine a corrected pixel value based on an input pixel value of the pixel in the input image and based on the pixel view angle; and provide the corrected pixel value for the pixel in an angle-corrected image corresponding to the input image. The display system further includes a display panel to display the angle-corrected image.
    Type: Application
    Filed: December 12, 2019
    Publication date: October 6, 2022
    Inventors: Patrick Llull, John D. Perreault, Andrew Huibers
  • Patent number: 11435576
    Abstract: A near-eye display system includes a display panel to display a near-eye lightfield frame comprising an array of elemental images and an eye tracking component to track a pose of a user's eye. The system further includes a lenslet array and a rendering component to adjust the focal points of the array of elemental images in the integral lightfield frame based on the pose of the user's eye. A method of operation of the near-eye display system includes determining, using an eye tracking component of the near-eye display system, a first pose of a user's eye and determining a desired focal point for an array of elemental images forming an integral lightfield frame based on the first pose of the user's eye. The method further includes changing the focal length of light projecting out of a lenslet array based on the first pose of the user's eye.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: September 6, 2022
    Assignee: Google LLC
    Inventors: John D. Perreault, Patrick Llull
  • Patent number: 11428633
    Abstract: The present disclosure relates to systems and methods for cellular imaging and identification through the use of a light sheet flow cytometer. In one implementation, a light sheet flow cytometer may include a light source configured to emit light having one or more wavelengths, at least one optical element configured to form a light sheet from the emitted light, a microfluidic channel configured to hold a sample, and an imaging device. The imaging device may be adapted to forming 3-D images of the sample such that identification tags attached to the sample are visible.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: August 30, 2022
    Assignee: Verily Life Sciences LLC
    Inventors: Cheng-Hsun Wu, Brian M. Rabkin, Supriyo Sinha, John D. Perreault, Chinmay Belthangady, James Higbie, Seung Ah Lee
  • Patent number: 11314083
    Abstract: A near-eye display system includes a display panel to present image frames to the eyes of a user for viewing. The system also includes a beam steering assembly facing the display panel that is configurable to displace a light beam incident on the beam steering assembly, thereby laterally shifting light relative to an optical path of the light beam incident on the beam steering assembly. The beam steering assembly includes a birefringent plate configurable to replicate a light ray incident on the beam steering assembly such that the replicated light ray is laterally shifted relative to an optical path of the light ray incident on the beam steering assembly.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: April 26, 2022
    Assignee: Google LLC
    Inventors: John D. Perreault, Patrick Llull, Brion Koprowski
  • Patent number: 11181801
    Abstract: A near-eye display system includes a display panel to present image frames to the eyes of a user for viewing. The system also includes a beam steering assembly facing the display panel that is configurable to displace a light beam incident on the beam steering assembly, thereby laterally shifting light relative to an optical path of the light beam incident on the beam steering assembly. A method of operation of the near-eye display system includes configuring the beam steering assembly in a first configuration state so that the beam steering assembly displaces a light beam incident on the beam steering assembly, such that the displaced light beam is laterally shifted relative to an optical path of the light beam.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: November 23, 2021
    Assignee: Google LLC
    Inventors: John D. Perreault, Patrick Llull, Brion Koprowski
  • Patent number: 11067724
    Abstract: A near-eye display system includes a display panel to emit display light representative of a display image and a lens assembly disposed along an optical axis. The lens assembly includes a first phase mask plate having a first major surface facing the display and a second major surface opposite the first major surface, the second major surface implementing a first freeform Fresnel lens structure, and further includes a second phase mask plate adjacent and parallel to the first phase mask plate and having a third major surface facing the second major surface and an opposing fourth majors surface, the third major surface implementing a second freeform Fresnel lens structure. A pose of at least one of the first and second phase mask plates relative to the other is configured to be adjusted so as to adjust an optical power of the lens assembly.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: July 20, 2021
    Assignee: Google LLC
    Inventors: John D. Perreault, Oscar Martinez
  • Patent number: 11022806
    Abstract: A near-eye display system includes a transmissive display panel to display a near-eye light field frame comprising an array of elemental images. The transmissive display panel is configured to transmit light rays of the near-eye light field frame away from the user's eye and towards an array of curved beam splitters. The curved beam splitters collimate the transmitted light rays and reflect the collimated light rays back towards the transmissive display panel for passing to the user's eye.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: June 1, 2021
    Assignee: Google LLC
    Inventors: John D. Perreault, Patrick Llull
  • Publication number: 20210076025
    Abstract: A near-eye display system includes a display panel to display a near-eye lightfield frame comprising an array of elemental images and an eye tracking component to track a pose of a user's eye. The system further includes a lenslet array and a rendering component to adjust the focal points of the array of elemental images in the integral lightfield frame based on the pose of the user's eye. A method of operation of the near-eye display system includes determining, using an eye tracking component of the near-eye display system, a first pose of a user's eye and determining a desired focal point for an array of elemental images forming an integral lightfield frame based on the first pose of the user's eye. The method further includes changing the focal length of light projecting out of a lenslet array based on the first pose of the user's eye.
    Type: Application
    Filed: October 27, 2020
    Publication date: March 11, 2021
    Inventors: John D. Perreault, Patrick Llull
  • Publication number: 20200404249
    Abstract: A method includes capturing an image of a lenticular display, generating a lenticular distortion map of the lenticular display using the image, and compensating for a lenticular distortion of the lenticular display using the lenticular distortion map. The lenticular distortion map is a dual-component lenticular distortion map and the image is a fringe pattern. The method compensates for the lenticular distortion by adjusting a swizzle function based on the lenticular distortion map.
    Type: Application
    Filed: June 21, 2019
    Publication date: December 24, 2020
    Inventor: John D. Perreault
  • Patent number: 10869023
    Abstract: A method includes capturing an image of a lenticular display, generating a lenticular distortion map of the lenticular display using the image, and compensating for a lenticular distortion of the lenticular display using the lenticular distortion map. The lenticular distortion map is a dual-component lenticular distortion map and the image is a fringe pattern. The method compensates for the lenticular distortion by adjusting a swizzle function based on the lenticular distortion map.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: December 15, 2020
    Assignee: Google LLC
    Inventor: John D. Perreault
  • Patent number: 10855977
    Abstract: A near-eye display system includes a display panel to display a near-eye lightfield frame comprising an array of elemental images and an eye tracking component to track a pose of a user's eye. The system further includes a lenslet array and a rendering component to adjust the focal points of the array of elemental images in the integral lightfield frame based on the pose of the user's eye. A method of operation of the near-eye display system includes determining, using an eye tracking component of the near-eye display system, a first pose of a user's eye and determining a desired focal point for an array of elemental images forming an integral lightfield frame based on the first pose of the user's eye. The method further includes changing the focal length of light projecting out of a lenslet array based on the first pose of the user's eye.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: December 1, 2020
    Assignee: GOOGLE LLC
    Inventors: John D. Perreault, Patrick Llull
  • Patent number: 10827164
    Abstract: A head-mounted display (HMD) device includes one or more active shutters coupled to a synchronization module. The synchronization module includes a first photodiode configured to detect a synchronization signal for controlling operation of the one or more active shutters. The one or more active shutters are configured to alternate between an open state to pass light and a closed state to block light for reducing a duty cycle of a display screen of a mobile device positioned within the HMD device. The synchronization signal provides a timing to block light from the display screen for a display update duration corresponding to a subset of pixels of the display screen.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: November 3, 2020
    Assignee: Google LLC
    Inventors: John D. Perreault, Jonathan Huang, Patrick Llull, Adrian Wong, Justin Legakis
  • Patent number: 10764552
    Abstract: A near-eye display system includes display panel to display a near-eye lightfield frame comprising an array of elemental images and a lenslet array to present the integral lightfield frame to a user's eye. The system further includes a rendering component to generate an array of elemental images based at least in part on a sparse sampling of a source image to decrease an overlap of image data contained within each individual elemental of the array of elemental images. A method of operation of the near-eye display system includes generating an array of elemental images forming the integral lightfield frame based on a sparse sampling of the current viewpoint of the subject object to decrease an overlap of image data contained within each individual elemental image of the array.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: September 1, 2020
    Assignee: GOOGLE LLC
    Inventors: John D. Perreault, Patrick Llull
  • Publication number: 20200264438
    Abstract: A near-eye display system includes a transmissive display panel to display a near-eye light field frame comprising an array of elemental images. The transmissive display panel is configured to transmit light rays of the near-eye light field frame away from the user's eye and towards an array of curved beam splitters. The curved beam splitters collimate the transmitted light rays and reflect the collimated light rays back towards the transmissive display panel for passing to the user's eye.
    Type: Application
    Filed: May 4, 2020
    Publication date: August 20, 2020
    Inventors: John D. PERREAULT, Patrick LLULL
  • Publication number: 20200182793
    Abstract: The present disclosure relates to systems and methods for cellular imaging and identification through the use of a light sheet flow cytometer. In one implementation, a light sheet flow cytometer may include a light source configured to emit light having one or more wavelengths, at least one optical element configured to form a light sheet from the emitted light, a microfluidic channel configured to hold a sample, and an imaging device. The imaging device may be adapted to forming 3-D images of the sample such that identification tags attached to the sample are visible.
    Type: Application
    Filed: February 12, 2020
    Publication date: June 11, 2020
    Inventors: Cheng-Hsun Wu, Brian M. Rabkin, Supriyo Sinha, John D. Perreault, Chinmay Belthangady, James Higbie, Seung Ah Lee
  • Patent number: 10678049
    Abstract: A near-eye display system includes a display panel to display a lightfield image comprising an array of elemental images and a lenslet array facing the display panel, the lenslet array comprising lenslets with spatially-varying prescriptions, such as different diameters, different focal lengths, and different asphere terms. The lenslet array further may be formed with a planar or non-planar substrate. The system further may include a distortion map comprising a set of transform matrices, each transform matrix configured to pre-distort a corresponding elemental image of a lightfield image so as to compensate for distortion expected to be introduced by a corresponding lenslet of the lenslet array, as well as a rendering component configured to modify the array of elemental images of a rendered lightfield using the distortion map to generate a modified lightfield image, and provide the modified lightfield image for display at the display panel for viewing via the lenslet array.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: June 9, 2020
    Assignee: GOOGLE LLC
    Inventors: John D. Perreault, Patrick Llull