Patents by Inventor Peter John Roberts
Peter John Roberts 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).
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Patent number: 12199213Abstract: An image display device includes a drive circuit substrate, micro LED elements, and a wavelength conversion layer that converts excitation light emitted from the micro LED elements and that emits converted long-wavelength light to a side opposite to the drive circuit substrate, the micro LED elements and the wavelength conversion layer being sequentially stacked on the drive circuit substrate. The micro LED elements include a first multilayer film that reflects the long-wavelength light converted by the wavelength conversion layer.Type: GrantFiled: September 16, 2021Date of Patent: January 14, 2025Assignee: SHARP KABUSHIKI KAISHAInventors: Katsuji Iguchi, Koji Takahashi, Hidenori Kawanishi, Peter John Roberts, Nathan Cole
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Publication number: 20240345411Abstract: The display device of the present invention includes, in the following order toward a viewer: a display panel; a semi-transparent mirror; a lens; a Pancharatnam-Berry lens configured to cause one-handed circularly polarized light incident thereon that is left-handed circularly polarized light or right-handed circularly polarized light to converge while causing opposite-handed circularly polarized light incident thereon to diverge; and a circularly polarized light-selective reflector, a circularly polarized light-selective reflector side surface of the lens having a planar shape.Type: ApplicationFiled: March 15, 2024Publication date: October 17, 2024Inventors: MATTIA SIGNORETTO, David James Montgomery, Peter John Roberts, Naru Usukura, Manabu Daio
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Patent number: 11871610Abstract: A light-emitting structure includes a substrate, a sub-pixel stack over a surface of the substrate, and a bank including a first bank portion and a second bank portion. The sub-pixel stack has an emissive stack including an emissive layer between a first transport layer and a second transport layer, a first electrode layer coupled to the first transport layer, and a second electrode layer coupled to the second transport layer. The second bank portion is between the first bank portion and the sub-pixel stack, and the bank surrounding at least the emissive stack and the first electrode layer forms an interior space above the sub-pixel stack.Type: GrantFiled: May 13, 2021Date of Patent: January 9, 2024Assignee: SHARP KABUSHIKI KAISHAInventors: David James Montgomery, Peter John Roberts
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Patent number: 11762151Abstract: [Object] To provide a technology in flash LiDAR applicable to a wide incidence-angle range. [Solution] An optical radar device (100) includes a light emitting unit (110) that diffusively radiates a laser beam, an arrayed light receiving unit (120) that receives the laser beam emitted from the light emitting unit (110) and reflected off an object whose range is to be determined (10), the arrayed light receiving unit (120) including light receiving elements arrayed two-dimensionally, and a telecentric lens (140) disposed between the object whose range is to be determined and the light receiving element.Type: GrantFiled: November 1, 2019Date of Patent: September 19, 2023Assignee: SHARP KABUSHIKI KAISHAInventors: Koji Takahashi, Peter John Roberts
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Patent number: 11681142Abstract: [Object] To provide (i) a two-lens optical system, (ii) a beam combining module, (iii) a projector, and (iv) a method for assembling a two-lens optical system each of which allows for an improved lens positioning sensitivity [Means to Attain the Object] A two-lens optical system (100) includes a first lens (1) for use in collimation adjustment, the first lens being configured to move along only an optical axis of light emitted from a light source; and a second lens (2) for use in beam steering, the second lens being configured to move along only two axes perpendicular to the optical axis.Type: GrantFiled: May 14, 2018Date of Patent: June 20, 2023Assignee: SHARP KABUSHIKI KAISHAInventors: Peter John Roberts, Noriaki Fujii, Shin Itoh
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Patent number: 11626576Abstract: A light-emitting structure includes a substrate, a sub-pixel stack, a cover layer over the sub-pixel stack, and at least one interface between the substrate and the cover layer. The at least one interface has an interface roughness. The sub-pixel stack includes an emissive layer between a first transport layer and a second transport layer, a first electrode layer coupled to the first transport layer, and a second electrode layer coupled to the second transport layer. The sub-pixel stack is over the substrate and configured to emit light including a scattering component caused by the interface roughness and a cavity component separate from the scattering component. A ratio of a luminance of the scattering component to a luminance of the cavity component increases with a viewing angle relative to a display normal. An optical power of the scattering component is a fraction of an optical power of the cavity component.Type: GrantFiled: June 15, 2021Date of Patent: April 11, 2023Assignee: SHARP KABUSHIKI KAISHAInventors: Peter John Roberts, David James Montgomery
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Patent number: 11133434Abstract: An image display device includes a drive circuit substrate, micro LED elements, and a wavelength conversion layer that converts excitation light emitted from the micro LED elements and that emits converted long-wavelength light to a side opposite to the drive circuit substrate, the micro LED elements and the wavelength conversion layer being sequentially stacked on the drive circuit substrate. The micro LED elements include a first multilayer film that reflects the long-wavelength light converted by the wavelength conversion layer.Type: GrantFiled: March 1, 2019Date of Patent: September 28, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Katsuji Iguchi, Koji Takahashi, Hidenori Kawanishi, Peter John Roberts, Nathan Cole
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Patent number: 10754234Abstract: An embodiment of the present invention enables an improvement in image resolution. A projection device (1) includes: a light source (11); a MEMS mirror (14) which reflects and two-dimensionally scans the laser beam emitted from the light source; and a free-form lens (15) which changes focusing properties of the laser beam reflected by the scanning section such that, after propagation of the laser beam to a screen (20) onto which the image is to be projected, a shape of the laser beam when viewed on the screen has a first width that is shorter than a second width of the shape, the first width being along a horizontal direction corresponding to a primary scanning direction in which the MEMS mirror scans the laser beam, the second width being along a vertical direction.Type: GrantFiled: November 29, 2018Date of Patent: August 25, 2020Assignee: Sharp Kabushiki KaishaInventors: Peter John Roberts, Noriaki Fujii, Kengo Yamasawa
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Publication number: 20200174356Abstract: An embodiment of the present invention enables an improvement in image resolution. A projection device (1) includes: a light source (11); a MEMS mirror (14) which reflects and two-dimensionally scans the laser beam emitted from the light source; and a free-form lens (15) which changes focusing properties of the laser beam reflected by the scanning section such that, after propagation of the laser beam to a screen (20) onto which the image is to be projected, a shape of the laser beam when viewed on the screen has a first width that is shorter than a second width of the shape, the first width being along a horizontal direction corresponding to a primary scanning direction in which the MEMS mirror scans the laser beam, the second width being along a vertical direction.Type: ApplicationFiled: November 29, 2018Publication date: June 4, 2020Inventors: Peter John Roberts, Noriaki Fujii, Kengo Yamasawa
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Patent number: 10281640Abstract: An illumination system comprises a lightguide (12) having a plurality of light extraction features (LEFs); and a plurality of independently controllable light sources (11a, 11b, 11c). The LEFs have a preferred direction, with light that is incident on an LEF along the preferred direction of the LEF being extracted from the lightguide generally parallel to a reference plane, and light that is incident on an LEF not along the preferred direction of the LEF being extracted from the lightguide at an extraction angle to the reference plane, the extraction angle being related by a response function to an incidence angle between the light propagation direction and the preferred direction of LEF. The shape of the LEFs varies with distance from a reference point or respective reference point so that the response function becomes larger with increasing distance of the LEFs from the reference point.Type: GrantFiled: September 16, 2015Date of Patent: May 7, 2019Assignee: Sharp Kabushiki KaishaInventors: David James Montgomery, Peter John Roberts, Paul Antony Gass
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Publication number: 20170255020Abstract: A head mounted display device includes a switchable light source that is switched to emit light for generating at least one viewing zone, and a panel illumination unit illuminated by the light source. The panel illumination unit converges the light onto an image panel that selectively transmits light at different pixels to generate image content. An eye monitor measures information pertaining to an eye configuration of a user, and the image content is visible to the user when the eye is aligned with respect to the viewing zone. The panel illumination unit converges the light such that light emitted by the image panel converges into the viewing zone positioned based on the eye configuration information measured by the eye monitor, with limited divergence such that when the display device is worn by the user, the image panel is located at a distance from the user's eye closer than a distance where the eye can focus the pixels.Type: ApplicationFiled: March 4, 2016Publication date: September 7, 2017Inventors: Ka Ho Tam, David James Montgomery, Andrew Kay, Peter John Roberts, Marco Zanola
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Publication number: 20150176810Abstract: A lighting device includes a transparent optical cavity having an exit surface including a specularly reflective material arranged to reflect light into the cavity, the exit surface having a plurality of apertures formed therein, a base surface including a specularly reflective material arranged to reflect light into the cavity, and at least one light receiving surface arranged relative to the base surface and configured to receive light from a light source. The plurality of apertures are arranged to maximize at least one of uniformity, angular distribution, efficiency or luminous intensity of light exiting the exit surface, and a distribution of light received at the light receiving surface is altered by at least one of a combination of the exit surface and the base surface, or the light receiving surface.Type: ApplicationFiled: July 22, 2013Publication date: June 25, 2015Inventors: Sarah Anne Mitchell, David James Montgomery, Peter John Roberts, Jonathan Heffernan, James Rowland Suckling, Samir Rihani
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Patent number: 8514352Abstract: A phosphor-based multi-colored display is provided which includes a spatial light modulator comprising an addressable array of apertures each corresponding to a respective sub-pixel in the display; an array of phosphor regions each indexed to a corresponding aperture of the spatial light modulator; and a backlight which provides quasi-monochromatic light to phosphor within each of the phosphor regions. The phosphor within each of the phosphor regions, upon being excited by the quasi-monochromatic light of the backlight, emits light having a color different from a color of the quasi-monochromatic light, through the corresponding aperture of the spatial light modulator.Type: GrantFiled: December 10, 2010Date of Patent: August 20, 2013Assignee: Sharp Kabushiki KaishaInventors: David James Montgomery, Peter John Roberts, Lesley Ann Parry-Jones, Emma Jayne Walton
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Patent number: 8306379Abstract: A hollow core photonic crystal fiber (HCPCF) having a wavelength of operation, the HCPCF comprising: a core region having a first refractive index; a cladding region surrounding the core region and comprising a plurality of microcapillaries arranged in a transverse structure having a pitch, the pitch of the structure being at least five times larger than the wavelength of operation, the cladding region having a second refractive index higher than the first refractive index.Type: GrantFiled: September 24, 2008Date of Patent: November 6, 2012Assignee: GLOphotonics SASInventors: Abdel Fetah Benabid, Francois Yves Michel Denis Couny, Peter John Roberts
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Publication number: 20120147296Abstract: A phosphor-based multi-coloured display is provided which includes a spatial light modulator comprising an addressable array of apertures each corresponding to a respective sub-pixel in the display; an array of phosphor regions each indexed to a corresponding aperture of the spatial light modulator; and a backlight which provides quasi-monochromatic light to phosphor within each of the phosphor regions. The phosphor within each of the phosphor regions, upon being excited by the quasi-monochromatic light of the backlight, emits light having a colour different from a colour of the quasi-monochromatic light, through the corresponding aperture of the spatial light modulator.Type: ApplicationFiled: December 10, 2010Publication date: June 14, 2012Inventors: David James MONTGOMERY, Peter John Roberts, Lesley Ann Parry-Jones, Emma Jayne Walton
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Publication number: 20120133624Abstract: A display panel incorporates the functionality to determine the three dimensional position of a light reflecting or emitting object (400, 401, 410) in front of a display surface (100). An array of sensors (310) is disposed in the panel and provided with optical arrangements such as apertures in masks (321, 331) within the panel. These arrangements prevent light incident normally on the display surface (100) from reaching the sensors (310) but allow obliquely incident light (602, 604) to reach the sensors (310). The object position is determined by analyzing the sensor responses.Type: ApplicationFiled: May 28, 2010Publication date: May 31, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Jean Luc Laurent Castagner, David James Montgomery, James Rowland Suckling, Peter John Roberts
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Publication number: 20110267612Abstract: An optical fibre is provided having a fibre cladding around a longitudinally extending optical propagation core. The cladding has a reflection region of a varying refractive index in the longitudinal direction.Type: ApplicationFiled: July 3, 2009Publication date: November 3, 2011Applicant: University of BathInventors: Peter John Roberts, Abdel Fetah Benabid
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Publication number: 20100328658Abstract: A hollow core photonic crystal fibre (HCPCF) having a wavelength of operation, the HCPCF comprising: a core region having a first refractive index; a cladding region surrounding the core region and comprising a plurality of microcapillaries arranged in a transverse structure having a pitch, the pitch of the structure being at least five times larger than the wavelength of operation, the cladding region having a second refractive index higher than the first refractive index.Type: ApplicationFiled: September 24, 2008Publication date: December 30, 2010Applicant: University of BathInventors: Abdel Fetah Benabid, Francois Yves Michel Denis Couny, Peter John Roberts
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Patent number: 7532798Abstract: An elongate waveguide for guiding light including a core having an elongate region of relatively low refractive index; a microstructured region around the core comprising elongate regions of relatively low refractive index interspersed with elongate regions of relatively high refractive index; and a boundary at the interface between the core and the microstructured region, the boundary including, in the transverse cross-section, a region of relatively high refractive index, which is connected to the microstructured region at a plurality of nodes, and at least one relatively enlarged region around the boundary, the enlarged region having a major dimension and a minor dimension, wherein the length of the major dimension divided by the length of the minor dimension is more than 3.0.Type: GrantFiled: November 2, 2007Date of Patent: May 12, 2009Assignee: Crystal Fibre A/SInventors: David Philip Williams, Timothy Adam Birks, Philip St. John Russell, Peter John Roberts, Hendrik Sabert, Alexander Onischenko
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Publication number: 20080138023Abstract: An elongate waveguide for guiding light including a core having an elongate region of relatively low refractive index; a microstructured region around the core comprising elongate regions of relatively low refractive index interspersed with elongate regions of relatively high refractive index; and a boundary at the interface between the core and the microstructured region, the boundary including, in the transverse cross-section, a region of relatively high refractive index, which is connected to the microstructured region at a plurality of nodes, and at least one relatively enlarged region around the boundary, the enlarged region having a major dimension and a minor dimension, wherein the length of the major dimension divided by the length of the minor dimension is more than 3.0.Type: ApplicationFiled: November 2, 2007Publication date: June 12, 2008Applicant: CRYSTAL FIBRE A/SInventors: David Philip Williams, Timothy Adam Birks, Philip St. John Russell, Peter John Roberts, Hendrik Sabert, Alexander Onischenko