Patents by Inventor Howard Walter Walker

Howard Walter Walker 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).

  • Luminescent solar concentrator
    Patent number: 9178096
    Abstract: A stacked luminescent solar concentrator includes two separate absorption/emission cells, each having a layer of luminophore-type material, wherein a top layer is a high band gap layer comprised of quantum dots in polymer, wherein the quantum dots are engineered so as to absorb a significant percentage of photons above bandgap. The bottom layer is a lower band gap layer comprised of quantum dots in polymer, wherein the quantum dots in the second layer are engineered so as to absorb photons not absorbed in the top layer, thus increasing total percentage of absorbed photons. Photovoltaic cells are located below the layers at the bottom of the cells or at the edges of the cells. The sides and lower surfaces of the cells may include reflective surfaces as discussed further herein. Reflection losses from the top surface thereof may be minimized using a broadband anti-reflective coating (AR) on the surface.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: November 3, 2015
    Assignee: Leidos, Inc.
    Inventors: John Paul Ziegler, Howard Walter Walker, Richard Holmes Griffey, Newell Convers Wyeth
  • Luminescent Solar Concentrator
    Publication number: 20150287864
    Abstract: A stacked luminescent solar concentrator includes two separate absorption/emission cells, each having a layer of luminophore-type material, wherein a top layer is a high band gap layer comprised of quantum dots in polymer, wherein the quantum dots are engineered so as to absorb a significant percentage of photons above bandgap. The bottom layer is a lower band gap layer comprised of quantum dots in polymer, wherein the quantum dots in the second layer are engineered so as to absorb photons not absorbed in the top layer, thus increasing total percentage of absorbed photons. Photovoltaic cells are located below the layers at the bottom of the cells or at the edges of the cells. The sides and lower surfaces of the cells may include reflective surfaces as discussed further herein. Reflection losses from the top surface thereof may be minimized using a broadband anti-reflective coating (AR) on the surface.
    Type: Application
    Filed: October 15, 2014
    Publication date: October 8, 2015
    Inventors: John Paul Ziegler, Howard Walter Walker, Richard Holmes Griffey, Newell Convers Wyeth
  • Luminescent solar concentrator
    Patent number: 8866001
    Abstract: A stacked luminescent solar concentrator includes two separate absorption/emission cells, each having a layer of luminophore-type material, wherein a top layer is a high band gap layer comprised of quantum dots in polymer, wherein the quantum dots are engineered so as to absorb a significant percentage of photons above bandgap. The bottom layer is a lower band gap layer comprised of quantum dots in polymer, wherein the quantum dots in the second layer are engineered so as to absorb photons not absorbed in the top layer, thus increasing total percentage of absorbed photons. Photovoltaic cells are located below the layers at the bottom of the cells or at the edges of the cells. The sides and lower surfaces of the cells may include reflective surfaces as discussed further herein. Reflection losses from the top surface thereof may be minimized using a broadband anti-reflective coating (AR) on the surface.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: October 21, 2014
    Assignee: Leidos, Inc.
    Inventors: John Paul Ziegler, Howard Walter Walker, Richard Holmes Griffey, Newell Convers Wyeth