Patents by Inventor Graham John Woodgate

Graham John Woodgate 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: 10330283
    Abstract: An illumination apparatus comprises a plurality of LEDs aligned to an array of directional optical elements wherein the LEDs are substantially at the input aperture of respective optical elements. An electrode array is formed on the array of optical elements to provide at least a first electrical connection to the array of LED elements. Advantageously such an arrangement provides low cost and high efficiency from the directional LED array.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: June 25, 2019
    Assignee: Optovate Limited
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Publication number: 20170160554
    Abstract: Disclosed is an optical valve or light valve for providing large area collimated illumination from localized light sources, and system and method thereof for 2D, 3D, and/or autosteroscopic displays. An optical valve may include a stepped structure, in which the steps include separated extraction features which may be optically hidden to light propagating in a first direction. Light propagating in a second direction may be refracted, diffracted, or reflected by the features to provide illumination beams exiting from the top surface of the optical valve. Such controlled illumination may provide for efficient, multi-user autostereoscopic displays as well as improved 2D display functionality.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 8, 2017
    Inventors: Michael G. Robinson, Graham John Woodgate, Jonathan Harrold
  • Publication number: 20170102127
    Abstract: An illumination apparatus comprises a plurality of LEDs aligned to an array of directional optical elements wherein the LEDs are substantially at the input aperture of respective optical elements. An electrode array is formed on the array of optical elements to provide at least a first electrical connection to the array of LED elements. Advantageously such an arrangement provides low cost and high efficiency from the directional LED array.
    Type: Application
    Filed: December 16, 2016
    Publication date: April 13, 2017
    Applicant: Optovate Limited
    Inventors: Graham John WOODGATE, Jonathan HARROLD
  • Patent number: 9519153
    Abstract: Disclosed is an optical valve or light valve for providing large area collimated illumination from localized light sources, and system and method thereof for 2D, 3D, and/or autosteroscopic displays. An optical valve may include a stepped structure, in which the steps include separated extraction features which may be optically hidden to light propagating in a first direction. Light propagating in a second direction may be refracted, diffracted, or reflected by the features to provide illumination beams exiting from the top surface of the optical valve. Such controlled illumination may provide for efficient, multi-user autostereoscopic displays as well as improved 2D display functionality.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: December 13, 2016
    Assignee: RealD Inc.
    Inventors: Michael G. Robinson, Graham John Woodgate, Jonathan Harrold
  • Patent number: 9188731
    Abstract: Disclosed is a light guiding valve apparatus including at least one transparent stepped waveguide optical valve for providing large area collimated illumination from localized light sources, and at least one further illumination source. A stepped waveguide may be a stepped structure, where the steps include extraction features hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Such controlled illumination may provide for efficient, multi-user autostereoscopic displays as well as improved 2D display functionality. Light from a separate illumination source may pass through the transparent stepped waveguide optical valve to provide at least one further additional illumination function.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 17, 2015
    Assignee: RealD Inc.
    Inventors: Graham John Woodgate, Michael G. Robinson, Jonathan Harrold, Miller H. Schuck
  • Patent number: 9125253
    Abstract: An illumination system is provided. The illumination system comprises an array of light emitting elements, an array of directional optical elements and a light deflecting means arranged to provide a fan of light cones. A position detector senses the retroreflection from an observer's eyes and a control system reduces the intensity of light directed towards the retroreflection region. Such a system achieves glare reduction for a line-of-sight illumination apparatus.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: September 1, 2015
    Assignee: OPTOVATE LIMITED
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Patent number: 9091420
    Abstract: An illumination apparatus, a method of manufacture of the same and a heat sink apparatus for use in said illumination apparatus in which an array of optical elements directs light from an array of light emitting elements through a heat dissipating structure to achieve a thin and efficient light source that provides directional illumination with efficient dissipation of generated heat into the illuminated environment.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: July 28, 2015
    Assignee: OPTOVATE LIMITED
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Patent number: 9080752
    Abstract: A light emitting element array for an illumination apparatus, an illumination apparatus and method of manufacture of the same in which an array of light-emitting elements and an array of light directing optics are provided between first and second attached mothersheet substrates wherein the thermal resistance of at least one of the mothersheet substrates is reduced by means of thickness reduction so as to provide reduced LED junction temperature.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: July 14, 2015
    Assignee: OPTOVATE LIMITED
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Patent number: 8985810
    Abstract: An illumination apparatus and method of manufacture of the same in which an array of light-emitting elements is aligned to an array of optical elements to achieve a thin and efficient light source that can also be arranged to provide directional and/or programmable illumination.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: March 24, 2015
    Assignee: Optovate Limited
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Publication number: 20140306612
    Abstract: An illumination system is provided. The illumination system comprises an array of light emitting elements, an array of directional optical elements and a light deflecting means arranged to provide a fan of light cones. A position detector senses the retroreflection from an observer's eyes and a control system reduces the intensity of light directed towards the retroreflection region. Such a system achieves glare reduction for a line-of-sight illumination apparatus.
    Type: Application
    Filed: November 5, 2012
    Publication date: October 16, 2014
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Patent number: 8704987
    Abstract: A graded index birefringent component is described and shown with at least one liquid crystal layer having a plurality of lens segments, wherein the orientation of the liquid crystal molecules varies across each lens segment of the liquid crystal layer.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: April 22, 2014
    Assignee: AU Optronics Corporation
    Inventors: Jonathan Harrold, Graham John Woodgate, Chao-Yuan Chen
  • Patent number: 8692871
    Abstract: An autostereoscopic display apparatus includes a spatial light modulator in which alignment features such as bump features provide radially symmetric alignment of the molecules of the liquid crystal. A parallax element is arranged over the spatial light modulator to direct light from the pixels into different viewing windows. The apertures of the pixels are shaped such that, for each individual row of pixels, a notional line parallel to the geometric axes of the parallax elements has a total length of intersection with the pixels of the row, weighted for the intensity of light modulated by the alignment features, which is the same for all positions of the notional line. This improves angular intensity uniformity. The pixels may each include plural apertures, wherein the alignment features of the apertures of each individual pixel are offset from one another in a direction perpendicular to said geometric axes. This improves angular contrast uniformity.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: April 8, 2014
    Assignee: AU Optronics Corp.
    Inventors: Jonathan Harrold, Graham John Woodgate, Ren-Wei Liao
  • Publication number: 20140016314
    Abstract: A light emitting element array for an illumination apparatus, an illumination apparatus and method of manufacture of the same in which an array of light-emitting elements and an array of light directing optics are provided between first and second attached mothersheet substrates wherein the thermal resistance of at least one of the mothersheet substrates is reduced by means of thickness reduction so as to provide reduced LED junction temperature.
    Type: Application
    Filed: October 20, 2011
    Publication date: January 16, 2014
    Applicant: Optovate Limited
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Publication number: 20130308339
    Abstract: Disclosed is a light guiding valve apparatus including at least one transparent stepped waveguide optical valve for providing large area collimated illumination from localized light sources, and at least one further illumination source. A stepped waveguide may be a stepped structure, where the steps include extraction features hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Such controlled illumination may provide for efficient, multi-user autostereoscopic displays as well as improved 2D display functionality. Light from a separate illumination source may pass through the transparent stepped waveguide optical valve to provide at least one further additional illumination function.
    Type: Application
    Filed: March 15, 2013
    Publication date: November 21, 2013
    Inventors: Graham John Woodgate, Michael G. Robinson, Jonathan Harrold, Miller H. Schuck
  • Publication number: 20130271959
    Abstract: An illumination apparatus in which an array of light-emitting elements and an array of light directing optics are provided between first and second attached mothersheet substrates wherein the thickness of at least one mothersheet substrates is most between about 0.01 mm and about 1.1 mm thick so as to minimise LED junction temperature.
    Type: Application
    Filed: October 20, 2011
    Publication date: October 17, 2013
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Publication number: 20130258663
    Abstract: An illumination apparatus comprises a plurality of LEDs aligned to an array of directional optical elements wherein the LEDs are substantially at the input aperture of respective optical elements. An electrode array is formed on the array of optical elements to provide at least a first electrical connection to the array of LED elements. Advantageously such an arrangement provides low cost and high efficiency from the directional LED array.
    Type: Application
    Filed: October 20, 2011
    Publication date: October 3, 2013
    Applicant: OPTOVATE LIMITED
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Patent number: 8520155
    Abstract: Manufacture of a birefringent liquid crystal cell is performed as follows. A layer of isotropic material having an outer surface which is shaped with a surface relief structure and is provided with a liquid crystal alignment property is formed. A flexible sheet having an outer surface provided with a liquid crystal alignment property is formed. A curable birefringent liquid crystal material is applied to one or both of the layer of isotropic material and the flexible sheet. The flexible sheet is applied over the layer of isotropic material with the outer surfaces of the layer of isotropic material and the flexible sheet facing one another with the liquid crystal material therebetween, thereby to form a liquid crystal cell. The liquid crystal material is cured and the flexible sheet is removed from the liquid crystal cell.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: August 27, 2013
    Assignee: AU Optronics Corporation
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Publication number: 20130107525
    Abstract: An illumination apparatus, a method of manufacture of the same and a heat sink apparatus for use in said illumination apparatus in which an array of optical elements directs light from an array of light emitting elements through a heat dissipating structure to achieve a thin and efficient light source that provides directional illumination with efficient dissipation of generated heat into the illuminated environment.
    Type: Application
    Filed: March 29, 2011
    Publication date: May 2, 2013
    Applicant: OPTOVATE LIMITED
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Patent number: 8390914
    Abstract: A controllable light directional distributor for an illumination apparatus, and a method of manufacture of the same in which multiple elongate optical elements are arranged to provide controllable divergence angle from a light source with low divergence output angle.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: March 5, 2013
    Assignee: Optovate Limited
    Inventors: Graham John Woodgate, Jonathan Harrold
  • Patent number: 8345088
    Abstract: In an autostereoscopic display apparatus comprising a liquid crystal spatial light modulator having an array of pixels of different colors, each pixel comprising plural domains of different polar alignments, and a parallax element comprising an array of optical elements having geometric axes extending in parallel across the spatial light modulator in an inclined direction, the domains are shaped to improve the angular contrast uniformity. For each individual domain, a notional line parallel to the geometric axes of the optical elements of the parallax element has a total length of intersection with the individual domain, summed over adjacent pixels of the same color, is the same for all positions of the notional line. The total length of intersection for different domains is proportional to the area of the individual domains.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: January 1, 2013
    Assignee: AU Optronics Corporation
    Inventors: Jonathan Harrold, Graham John Woodgate