Patents by Inventor Douglas Tweet

Douglas Tweet 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: 10608134
    Abstract: A solar power method is provided using two-stage light concentration to drive concentrating photovoltaic conversion in conjunction with thermal collection. The method concentrates light rays received in a plurality of transverse planes towards a primary linear focus in an axial plane, which is orthogonal to the transverse planes. T band wavelengths of light are transmitted to the primary linear focus. R band wavelengths of light are reflected towards a secondary linear focus in the axial plane, which is parallel to the primary linear focus. The light received at the primary linear focus is translated into thermal energy. The light received at the secondary linear focus is focused by optical elements along a plurality of tertiary linear foci, which are orthogonal to the axial plane. The focused light in each tertiary primary focus is focused into a plurality of receiving areas, and translated into electrical energy.
    Type: Grant
    Filed: September 23, 2017
    Date of Patent: March 31, 2020
    Assignee: Norcon Technologies LLC
    Inventors: Brian Wheelwright, Wei Pan, Douglas Tweet
  • Patent number: 10505496
    Abstract: A method is provided for using asymmetrically focused photovoltaic conversion in a hybrid parabolic trough solar power system. Light rays received in a plurality of transverse planes are concentrated towards a primary linear focus in an axial plane, orthogonal to the transverse planes. T band wavelengths of light are transmitted to the primary linear focus, while R band wavelengths of light are reflected towards a secondary linear focus in the axial plane. The light received at the primary linear focus is translated into thermal energy. The light received at the secondary linear focus is asymmetrically focused along a plurality of tertiary linear foci, orthogonal to the axial plane. The focused light in each tertiary linear focus is concentrated into a plurality of receiving areas and translated into electrical energy. Asymmetrical optical elements are used having an optical input interfaces elongated along rotatable axes, orthogonal to the axial plane.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: December 10, 2019
    Assignee: DWP Energy Solutions, LLC
    Inventors: Brian Wheelwright, Wei Pan, Douglas Tweet
  • Publication number: 20180019704
    Abstract: A method is provided for using asymmetrically focused photovoltaic conversion in a hybrid parabolic trough solar power system. Light rays received in a plurality of transverse planes are concentrated towards a primary linear focus in an axial plane, orthogonal to the transverse planes. T band wavelengths of light are transmitted to the primary linear focus, while R band wavelengths of light are reflected towards a secondary linear focus in the axial plane. The light received at the primary linear focus is translated into thermal energy. The light received at the secondary linear focus is asymmetrically focused along a plurality of tertiary linear foci, orthogonal to the axial plane. The focused light in each tertiary linear focus is concentrated into a plurality of receiving areas and translated into electrical energy. Asymmetrical optical elements are used having an optical input interfaces elongated along rotatable axes, orthogonal to the axial plane.
    Type: Application
    Filed: September 27, 2017
    Publication date: January 18, 2018
    Inventors: Brian Wheelwright, Wei Pan, Douglas Tweet
  • Publication number: 20180019357
    Abstract: A solar power method is provided using two-stage light concentration to drive concentrating photovoltaic conversion in conjunction with thermal collection. The method concentrates light rays received in a plurality of transverse planes towards a primary linear focus in an axial plane, which is orthogonal to the transverse planes. T band wavelengths of light are transmitted to the primary linear focus. R band wavelengths of light are reflected towards a secondary linear focus in the axial plane, which is parallel to the primary linear focus. The light received at the primary linear focus is translated into thermal energy. The light received at the secondary linear focus is focused by optical elements along a plurality of tertiary linear foci, which are orthogonal to the axial plane. The focused light in each tertiary primary focus is focused into a plurality of receiving areas, and translated into electrical energy.
    Type: Application
    Filed: September 23, 2017
    Publication date: January 18, 2018
    Inventors: Brian Wheelwright, Wei Pan, Douglas Tweet
  • Patent number: 9787247
    Abstract: A method is provided for using asymmetrically focused photovoltaic conversion in a hybrid parabolic trough solar power system. Light rays received in a plurality of transverse planes are concentrated towards a primary linear focus in an axial plane, orthogonal to the transverse planes. T band wavelengths of light are transmitted to the primary linear focus, while R band wavelengths of light are reflected towards a secondary linear focus in the axial plane. The light received at the primary linear focus is translated into thermal energy. The light received at the secondary linear focus is asymmetrically focused along a plurality of tertiary linear foci, orthogonal to the axial plane. The focused light in each tertiary linear focus is concentrated into a plurality of receiving areas and translated into electrical energy. Asymmetrical optical elements are used having an optical input interfaces elongated along rotatable axes, orthogonal to the axial plane.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: October 10, 2017
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Brian Wheelwright, Wei Pan, Douglas Tweet
  • Patent number: 9773934
    Abstract: A solar power method is provided using two-stage light concentration to drive concentrating photovoltaic conversion in conjunction with thermal collection. The method concentrates light rays received in a plurality of transverse planes towards a primary linear focus in an axial plane, which is orthogonal to the transverse planes. T band wavelengths of light are transmitted to the primary linear focus. R band wavelengths of light are reflected towards a secondary linear focus in the axial plane, which is parallel to the primary linear focus. The light received at the primary linear focus is translated into thermal energy. The light received at the secondary linear focus is focused by optical elements along a plurality of tertiary linear foci, which are orthogonal to the axial plane. The focused light in each tertiary primary focus is focused into a plurality of receiving areas, and translated into electrical energy.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: September 26, 2017
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Brian Wheelwright, Wei Pan, Douglas Tweet
  • Patent number: 9348068
    Abstract: An energy-generating transparent (EGT) structure is provided, in addition to a method for generating energy from light incident to an EGT structure. The EGT structure is made up of a window pane with an interior surface adjacent a reflective structure. The method accepts light incident to an exterior surface of the window pane, and transmits light in the visible spectrum through the window pane and reflective structure. However, light in the near-infrared (NIR) spectrum is reflected back from the reflective structure into the window pane, so that reflected NIR, spectrum light is supplied to an edge of the window pane. For example, reflected NIR spectrum light is supplied to the window pane edge if the light has an angle greater than or equal to an angle TIR occurring between the window pane exterior surface and air. This reflected NIR spectrum light can be converted to electrical or thermal energy.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: May 24, 2016
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Akinori Hashimura, Douglas Tweet, Gary Hinch, Byron Cocilovo
  • Publication number: 20160099367
    Abstract: A solar power method is provided using two-stage light concentration to drive concentrating photovoltaic conversion in conjunction with thermal collection. The method concentrates light rays received in a plurality of transverse planes towards a primary linear focus in an axial plane, which is orthogonal to the transverse planes. T hand wavelengths of light are transmitted to the primary linear focus. R hand wavelengths of light are reflected towards a secondary linear focus in the axial plane, which is parallel to the primary linear focus. The light received at the primary linear focus is translated into thermal energy. The light received at the secondary linear focus is focused by optical elements along a plurality of tertiary linear foci, which are orthogonal to the axial plane. The focused light in each tertiary primary focus is focused into a plurality of receiving areas, and translated into electrical energy.
    Type: Application
    Filed: October 1, 2014
    Publication date: April 7, 2016
    Inventors: Brian Wheelwright, Wei Pan, Douglas Tweet
  • Publication number: 20160099674
    Abstract: A flat panel photovoltaic (PV) system is provided formed from a first sheet with rows of concentrated III-V photovoltaic (CPV) solar cells. An overlying second sheet is made up of rows of waveguides, where each waveguide is coupled to a corresponding CPV solar cell. A third sheet includes overlying one-piece linear lenses, each having a focal line coupled to the waveguides in a corresponding row. Optionally, a fourth sheet underlies the first sheet, which is a 1-sun solar panel including a plurality of silicon PV cells. In one variation adjacent rows of waveguides couple to the same row of CPV cells. In another variation, each waveguide in a row is optically coupled to waveguides in an adjacent row, which adjacent waveguides are then coupled to a corresponding row of CPV cells. A lens overlies each row of waveguides, with a focal line coupled to each waveguide in that row.
    Type: Application
    Filed: August 13, 2015
    Publication date: April 7, 2016
    Inventors: Wei Pan, Douglas Tweet, Brian Wheelwright, Gregory Stecker, David Evans, Hao-Chih Yuan
  • Publication number: 20160099675
    Abstract: A method is provided for using asymmetrically focused photovoltaic conversion in a hybrid parabolic trough solar power system. Light rays received in a plurality of transverse planes are concentrated towards a primary linear focus in an axial plane, orthogonal to the transverse planes. T band wavelengths of light are transmitted to the primary linear focus, while R band wavelengths of light are reflected towards a secondary linear focus in the axial plane. The light received at the primary linear focus is translated into thermal energy. The light received at the secondary linear focus is asymmetrically focused along a plurality of tertiary linear foci, orthogonal to the axial plane. The focused light in each tertiary linear focus is concentrated into a plurality of receiving areas and translated into electrical energy. Asymmetrical optical elements are used having an optical input interfaces elongated along rotatable axes, orthogonal to the axial plane.
    Type: Application
    Filed: December 19, 2014
    Publication date: April 7, 2016
    Inventors: Brian Wheelwright, Wei Pan, Douglas Tweet
  • Patent number: 9091812
    Abstract: An energy-efficient transparent solar film is presented. The solar film has a first film layer with metal nanostructures. The metal nanostructures have plasmon resonances in wavelength bands greater than, or both less than and greater than visible wavelengths, depending on size and shape. The metal nanostructures have no plasmon resonance at visible wavelengths. In another aspect, metal oxide nanocrystals are formed with the first film layer. The metal oxide nanocrystals have absorption in a band of wavelengths less than visible wavelengths, and absorption in a band of wavelengths greater than visible wavelengths. Also provided is a solar film window and fabricating method.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: July 28, 2015
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Akinori Hashimura, Douglas Tweet, Gary Hinch, Alexey Koposov
  • Patent number: 9063353
    Abstract: A plasmonic optical device is provided operating in near ultra violet (UV) and visible wavelengths of light. The optical device is made from a substrate and nanoparticles. The nanoparticles have a core with a negative real value relative permittivity of absolute value greater than 10 in a first range of wavelengths including near UV and visible wavelengths of light, and a shell with an imaginary relative permittivity of less than 5 in the first range of wavelengths. A dielectric overlies the substrate, and is embedded with the nanoparticles. If the substrate is reflective, a reflective optical filter is formed. If the substrate is transparent, the filter is transmissive. In one aspect, the dielectric is a tunable medium (e.g., liquid crystal) having an index of refraction responsive to an electric field. The tunable medium is interposed between a first electrode and a second electrode.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: June 23, 2015
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Akinori Hashimura, Douglas Tweet, Apostolos Voutsas
  • Publication number: 20130333693
    Abstract: An energy-generating transparent (EGT) structure is provided, in addition to a method for generating energy from light incident to an EGT structure. The EGT structure is made up of a window pane with an interior surface adjacent a reflective structure. The method accepts light incident to an exterior surface of the window pane, and transmits light in the visible spectrum through the window pane and reflective structure. However, light in the near-infrared (NIR) spectrum is reflected back from the reflective structure into the window pane, so that reflected NIR, spectrum light is supplied to an edge of the window pane. For example, reflected NIR spectrum light is supplied to the window pane edge if the light has an angle greater than or equal to an angle TIR occurring between the window pane exterior surface and air. This reflected NIR spectrum light can be converted to electrical or thermal energy.
    Type: Application
    Filed: July 31, 2013
    Publication date: December 19, 2013
    Applicant: Sharp Laboratories of America, Inc.
    Inventors: Akinori Hashimura, Douglas Tweet, Gary Hinch, Byron Cocilovo
  • Publication number: 20130258456
    Abstract: An energy-efficient transparent solar film is presented. The solar film has a first film layer with metal nanostructures. The metal nanostructures have plasmon resonances in wavelength bands greater than, or both less than and greater than visible wavelengths, depending on size and shape. The metal nanostructures have no plasmon resonance at visible wavelengths. In another aspect, metal oxide nanocrystals are formed with the first film layer. The metal oxide nanocrystals have absorption in a band of wavelengths less than visible wavelengths, and absorption in a band of wavelengths greater than visible wavelengths. Also provided is a solar film window and fabricating method.
    Type: Application
    Filed: April 29, 2013
    Publication date: October 3, 2013
    Inventors: Akinori Hashimura, Douglas Tweet, Gary Hinch, Alexey Koposov
  • Publication number: 20070295953
    Abstract: A floating body germanium (Ge) phototransistor and associated fabrication process are presented. The method includes: providing a silicon (Si) substrate; selectively forming an insulator layer overlying the Si substrate; forming an epitaxial Ge layer overlying the insulator layer using a liquid phase epitaxy (LPE) process; forming a channel region in the Ge layer; forming a gate dielectric, gate electrode, and gate spacers overlying the channel region; and, forming source/drain regions in the Ge layer. The LPE process involves encapsulating the Ge with materials having a melting temperature greater than a first temperature, and melting the Ge using a temperature lower than the first temperature. The LPE process includes: forming a dielectric layer overlying deposited Ge; melting the Ge; and, in response to cooling the Ge, laterally propagating an epitaxial growth front into the Ge from an underlying Si substrate surface.
    Type: Application
    Filed: August 10, 2007
    Publication date: December 27, 2007
    Inventors: Jong-Jan Lee, Cheng Hsu, Jer-Shen Maa, Douglas Tweet
  • Publication number: 20070298588
    Abstract: A method of fabricating a silicon-on-plastic layer via layer transfer includes depositing a layer of SiGe on a silicon substrate; depositing a layer of silicon; implanting splitting hydrogen ions into the silicon substrate; bonding a glass substrate to the silicon layer; splitting the wafer; removing the silicon layer and a portion of the SiGe layer; depositing a dielectric on the silicon side of the silicon-on-glass wafer; applying adhesive and bonding a plastic substrate to the silicon side of the silicon-on-glass wafer; removing the glass from the glass side of the bonded, silicon-on-glass wafer to form a silicon-on-plastic wafer; and completing a desired IC device on the silicon-on-plastic. Multi-level structure may be fabricated according to the method of the invention by repeating the last few steps of the method of the invention.
    Type: Application
    Filed: August 10, 2007
    Publication date: December 27, 2007
    Inventors: Jer-Shen Maa, Jong-Jan Lee, Douglas Tweet, Sheng Hsu
  • Publication number: 20070290288
    Abstract: A floating body germanium (Ge) phototransistor with a photo absorption threshold bias region, and an associated fabrication process are presented. The method includes: providing a p-doped Silicon (Si) substrate; selectively forming an insulator layer overlying a first surface of the Si substrate; forming an epitaxial Ge layer overlying the insulator layer; forming a channel region in the Ge layer; forming a gate dielectric, gate electrode, and gate spacers; forming source/drain (S/D) regions in the Ge layer; and, forming a photo absorption threshold bias region in the Ge layer, adjacent the channel region. In one aspect, the second S/D region has a length, longer than the first S/D length. The photo absorption threshold bias region underlies the second S/D region. Alternately, the second S/D region is separated from the channel by an offset, and the photo absorption threshold bias region is the offset in the Ge layer, after a light p-doping.
    Type: Application
    Filed: August 22, 2007
    Publication date: December 20, 2007
    Inventors: Sheng Hsu, Jong-Jan Lee, Jer-Shen Maa, Douglas Tweet
  • Publication number: 20070259467
    Abstract: A method of fabricating vertical sidewalls on silicon (110) substrates for use in Si/SiGe photodetectors includes preparing a silicon (110) layer wherein the silicon (110) plane is parallel to an underlying silicon wafer surface. Masking the silicon (110) layer with mask sidewalls parallel to a silicon (111) layer plane and etching the silicon (110) layer to remove an un-masked portion thereof, leaving a patterned silicon (110) layer having vertical silicon (111) sidewalls. Removing the mask; growing SiGe-containing layers on the patterned silicon (110) layer; and fabricating a photodetector.
    Type: Application
    Filed: May 2, 2006
    Publication date: November 8, 2007
    Inventors: Douglas Tweet, Jong-Jan Lee, Jer-Shen Maa, Sheng Hsu
  • Publication number: 20070259127
    Abstract: A method for densifying sol-gel films to form microlens structures includes preparing a sol-gel precursor, having at least one solvent therein. The sol-gel precursor is spin coated onto a wafer to form a sol-gel film thereon. The wafer and sol-gel film are hot plate baked at a temperature less than 200° C. to remove at least some of the solvent. The baked, wafer and spin-coated sol-gel film are treated with an oxygen plasma treatment to remove any remaining solvent and to densify the sol-gel film. The spin coating, hot plate baking and treating steps may be repeated as required. A microlens is formed from the densified sol-gel film.
    Type: Application
    Filed: May 2, 2006
    Publication date: November 8, 2007
    Inventors: Yoshi Ono, Bruce Ulrich, Wei-Wei Zhuang, Douglas Tweet
  • Publication number: 20070218578
    Abstract: A CMOS active pixel sensor includes a silicon-on-insulator substrate having a silicon substrate with an insulator layer formed thereon and a top silicon layer formed on the insulator layer. A stacked pixel sensor cell includes a bottom photodiode fabricated on the silicon substrate, for sensing light of a longest wavelength; a middle photodiode fabricated on the silicon substrate, for sensing light of a medium wavelength, which is stacked above the bottom photodiode; and a top photodiode fabricated on the top silicon layer, for sensing light of a shorter wavelength, which is stacked above the middle and bottom photodiodes. Pixel transistor sets are fabricated on the top silicon layer and are associated with each pixel sensor cell by electrical connections which extend between each of the photodiodes and respective pixel transistor(s). CMOS control circuitry is fabricated adjacent to an array of active pixel sensor cells and electrically connected thereto.
    Type: Application
    Filed: March 17, 2006
    Publication date: September 20, 2007
    Inventors: Jong-Jan Lee, Sheng Hsu, Douglas Tweet, Jer-Shen Maa