Patents by Inventor Emma Walton

Emma Walton 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: 9244286
    Abstract: A multiple depth display provided for displaying images at different depths comprises a single display device (61), for displaying all of the images. An optical system (62, 63, 64) is disposed in front of the display device (61). The optical system comprises first and second spaced-apart partial reflectors (62, 63) and polarization optics (64) for providing first and second light paths for first and second images or sequences of images displayed by the device (61). The first light path (65) comprises partial transmission through the first reflector (62), partial reflection from the second reflector (63), partial reflection from the first reflector (62), and partial transmission through the second reflector (65) towards a viewing region.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: January 26, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Allan Evans, Alistair Curd, Thomas Wynne-Powell, Adrian Jacobs, Nathan Smith, Emma Walton, Gregory Gay
  • Publication number: 20130057961
    Abstract: A multiple depth display provided for displaying images at different depths comprises a single display device (61), for displaying all of the images. An optical system (62, 63, 64) is disposed in front of the display device (61). The optical system comprises first and second spaced-apart partial reflectors (62, 63) and polarization optics (64) for providing first and second light paths for first and second images or sequences of images displayed by the device (61). The first light path (65) comprises partial transmission through the first reflector (62), partial reflection from the second reflector (63), partial reflection from the first reflector (62), and partial transmission through the second reflector (65) towards a viewing region.
    Type: Application
    Filed: September 7, 2012
    Publication date: March 7, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Allan EVANS, Alistair CURD, Thomas WYNNE-POWELL, Adrian JACOBS, Nathan SMITH, Emma WALTON, Gregory GAY
  • Publication number: 20090290079
    Abstract: A multiple depth display provided for displaying images at different depths comprises a single display device (61), for displaying all of the images. An optical system (62, 63, 64) is disposed in front of the display device (61). The optical system comprises first and second spaced-apart partial reflectors (62, 63) and polarization optics (64) for providing first and second light paths for first and second images or sequences of images displayed by the device (61). The first light path (65) comprises partial transmission through the first reflector (62), partial reflection from the second reflector (63), partial reflection from the first reflector (62), and partial transmission through the second reflector (65) towards a viewing region.
    Type: Application
    Filed: April 27, 2007
    Publication date: November 26, 2009
    Inventors: Allan Evans, Alistair Curd, Thomas Wynne-Powell, Adrian Jacobs, Nathan Smith, Emma Walton, Gregory Gay
  • Publication number: 20070133094
    Abstract: An optical film is provided for use in a light source or display to provide rapid cut-off of illumination with angle. The film comprises a light-transmissive substrate of a material having a refractive index greater than one and having first and second major surfaces. A surface relief is formed on at least one of the major surfaces and includes a mirror structure. The mirror structure comprises a groups of specularly reflective surfaces alternating in at least one direction with groups of transmissive surfaces. All of the reflective surfaces are non-parallel to the plane in which the surface relief extends and at least some of the reflective surfaces are non-perpendicular to that plane. Light propagating through the film in a first angular input range passes without reflection into a desired angular output range. Light propagating through the film and reflected by the reflective structure passes into the same or an overlapping or adjacent output angular range.
    Type: Application
    Filed: December 13, 2005
    Publication date: June 14, 2007
    Inventors: Emma Walton, Allan Evans, Thomas Wynne-Powell
  • Publication number: 20060126156
    Abstract: A display is provided for providing a restricted viewing mode, for example a private viewing mode where the display may be viewed from a limited region of space by a single viewer and not by other people outside the viewing region. The display comprises a source of polarised light and an output polariser. Between these are provided a controllable pixellated spatial polarisation modulating layer, for example of the liquid crystal type. Also, a polarisation modifying layer is provided between the polarisers and is spaced from the modulating layer. The modifying later comprises a plurality of sets of regions with the regions of each set having the same polarisation modifying effect and the regions of different sets having different polarisation modifying effects. The light path between the modulating layer and the modifying layer is polariser-free.
    Type: Application
    Filed: December 7, 2005
    Publication date: June 15, 2006
    Inventors: Allan Evans, Martin Tillin, Emma Walton
  • Publication number: 20050243265
    Abstract: A display is provided for switching between a narrow or private viewing mode and a wide or public viewing mode. The display comprises a display device which is controlled to provide display of a desired image or sequence of images. This is associated with a liquid crystal device having at least one liquid crystal layer whose molecules are switchable between a first state providing a first angular viewing range and a second state providing a second angular viewing range which is within and smaller than the first angular viewing range. With the molecules in the second state, the device at least partially blocks light propagating towards part of the first angular viewing range outside the second angular viewing range. The or each liquid crystal layer is in contact with at least one alignment surface, the or each of which comprises a uniform non-patterned alignment surface.
    Type: Application
    Filed: April 19, 2005
    Publication date: November 3, 2005
    Inventors: Robert Winlow, Zabbie Acosta, Martin Tillin, Paul Bonnett, Diana Kean, Grant Bourhill, Michel Sagardoyburu, Emma Walton, Koji Yabuta, Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 6621533
    Abstract: The present invention provides a polarization separation element comprising a first array of prisms having a wedge-shaped cross-section, and a second array of prisms also having a wedge-shaped cross section. One of the prism arrays is an array of birefringent prisms. The present invention also provides a polarization conversion system having a polarization separation element of the above type for directing light having a first polarization in a first direction and for directing light having a second polarization different from the first polarization in a second direction different from the first direction; and one or more polarization conversion elements for converting light having the first and second polarizations to light having a substantially common output polarization. The polarization conversion system of the invention is suitable for use in a projection display system.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: September 16, 2003
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Jason Kempton Slack, Marina Vladimirovna Khazova, Tamotsu Takatsuka, Keisuke Mitani, Kazuhiro Inoko, Graham John Woodgate, Masaharu Hara, Grant Bourhill, Emma Walton
  • Publication number: 20020093718
    Abstract: The present invention provides a polarization separation element comprising a first array of prisms having a wedge-shaped cross-section, and a second array of prisms also having a wedge-shaped cross section. One of the prism arrays is an array of birefringent prisms.
    Type: Application
    Filed: October 11, 2001
    Publication date: July 18, 2002
    Inventors: Jason Kempton Slack, Marina Vladimirovna Khazova, Tamotsu Takatsuka, Keisuke Mitani, Kazuhiro Inoko, Graham John Woodgate, Masaharu Hara, Grant Bourhill, Emma Walton