Patents by Inventor Steven D. Lester

Steven D. Lester 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).

  • Publication number: 20220069169
    Abstract: Aspects include Light Emitting Diodes that have a GaN-based light emitting region and a metallic electrode. The metallic electrode can be physically separated from the GaN-based light emitted region by a layer of porous dielectric, which provides a reflecting region between at least a portion of the metallic electrode and the GaN-based light emitting region.
    Type: Application
    Filed: September 9, 2021
    Publication date: March 3, 2022
    Inventors: Frank T. SHUM, William W. So, Steven D. Lester
  • Patent number: 11133440
    Abstract: Aspects include Light Emitting Diodes that have a GaN-based light emitting region and a metallic electrode. The metallic electrode can be physically separated from the GaN-based light emitted region by a layer of porous dielectric, which provides a reflecting region between at least a portion of the metallic electrode and the GaN-based light emitting region.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: September 28, 2021
    Assignee: BRIDGELUX, INC.
    Inventors: Frank T. Shum, William W. So, Steven D. Lester
  • Publication number: 20210280758
    Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of Segmented LEDs connected in parallel to a power bus and a controller. The power bus accepts a variable number of Segmented LEDs. The controller receives AC power and provides a power signal on the power bus. Each Segmented LED is characterized by a driving voltage that is greater than 3 times the driving voltage of a conventional LED fabricated in the same material system as the Segmented LED. The number of Segmented LEDs in the light source is chosen to compensate for variations in the light output of individual Segmented LEDs introduced by the manufacturing process. In another aspect of the invention, the number of Segmented LEDs connected to the power bus can be altered after the light source is assembled.
    Type: Application
    Filed: March 18, 2021
    Publication date: September 9, 2021
    Inventors: Ghulam HASNAIN, Syn-Yem HU, Steven D. LESTER
  • Patent number: 10966300
    Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of Segmented LEDs connected in parallel to a power bus and a controller. The power bus accepts a variable number of Segmented LEDs. The controller receives AC power and provides a power signal on the power bus. Each Segmented LED is characterized by a driving voltage that is greater than 3 times the driving voltage of a conventional LED fabricated in the same material system as the Segmented LED. The number of Segmented LEDs in the light source is chosen to compensate for variations in the light output of individual Segmented LEDs introduced by the manufacturing process. In another aspect of the invention, the number of Segmented LEDs connected to the power bus can be altered after the light source is assembled.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: March 30, 2021
    Assignee: BRIDGELUX, INC.
    Inventors: Ghulam Hasnain, Syn-Yem Hu, Steven D. Lester
  • Publication number: 20210020809
    Abstract: Aspects include Light Emitting Diodes that have a GaN-based light emitting region and a metallic electrode. The metallic electrode can be physically separated from the GaN-based light emitted region by a layer of porous dielectric, which provides a reflecting region between at least a portion of the metallic electrode and the GaN-based light emitting region.
    Type: Application
    Filed: August 6, 2020
    Publication date: January 21, 2021
    Inventors: Frank T. SHUM, William W. SO, Steven D. LESTER
  • Patent number: 10741726
    Abstract: Aspects include Light Emitting Diodes that have a GaN-based light emitting region and a metallic electrode. The metallic electrode can be physically separated from the GaN-based light emitted region by a layer of porous dielectric, which provides a reflecting region between at least a portion of the metallic electrode and the GaN-based light emitting region.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: August 11, 2020
    Assignee: BRIDGELUX INC.
    Inventors: Frank T. Shum, William W. So, Steven D. Lester
  • Publication number: 20200015335
    Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of Segmented LEDs connected in parallel to a power bus and a controller. The power bus accepts a variable number of Segmented LEDs. The controller receives AC power and provides a power signal on the power bus. Each Segmented LED is characterized by a driving voltage that is greater than 3 times the driving voltage of a conventional LED fabricated in the same material system as the Segmented LED. The number of Segmented LEDs in the light source is chosen to compensate for variations in the light output of individual Segmented LEDs introduced by the manufacturing process. In another aspect of the invention, the number of Segmented LEDs connected to the power bus can be altered after the light source is assembled.
    Type: Application
    Filed: June 21, 2019
    Publication date: January 9, 2020
    Inventors: Ghulam HASNAIN, Syn-Yem HU, Steven D. LESTER
  • Publication number: 20190305189
    Abstract: Aspects include Light Emitting Diodes that have a GaN-based light emitting region and a metallic electrode. The metallic electrode can be physically separated from the GaN-based light emitted region by a layer of porous dielectric, which provides a reflecting region between at least a portion of the metallic electrode and the GaN-based light emitting region.
    Type: Application
    Filed: January 28, 2019
    Publication date: October 3, 2019
    Inventors: Frank T. SHUM, William W. SO, Steven D. LESTER
  • Patent number: 10334674
    Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of Segmented LEDs connected in parallel to a power bus and a controller. The power bus accepts a variable number of Segmented LEDs. The controller receives AC power and provides a power signal on the power bus. Each Segmented LED is characterized by a driving voltage that is greater than 3 times the driving voltage of a conventional LED fabricated in the same material system as the Segmented LED. The number of Segmented LEDs in the light source is chosen to compensate for variations in the light output of individual Segmented LEDs introduced by the manufacturing process. In another aspect of the invention, the number of Segmented LEDs connected to the power bus can be altered after the light source is assembled.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: June 25, 2019
    Assignee: BRIDGELUX INC.
    Inventors: Ghulam Hasnain, Syn-Yem Hu, Steven D. Lester
  • Patent number: 10199543
    Abstract: Aspects include Light Emitting Diodes that have a GaN-based light emitting region and a metallic electrode. The metallic electrode can be physically separated from the GaN-based light emitted region by a layer of porous dielectric, which provides a reflecting region between at least a portion of the metallic electrode and the GaN-based light emitting region.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: February 5, 2019
    Assignee: BRIDGELUX, INC.
    Inventors: Frank T. Shum, William W. So, Steven D. Lester
  • Publication number: 20180295688
    Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of Segmented LEDs connected in parallel to a power bus and a controller. The power bus accepts a variable number of Segmented LEDs. The controller receives AC power and provides a power signal on the power bus. Each Segmented LED is characterized by a driving voltage that is greater than 3 times the driving voltage of a conventional LED fabricated in the same material system as the Segmented LED. The number of Segmented LEDs in the light source is chosen to compensate for variations in the light output of individual Segmented LEDs introduced by the manufacturing process. In another aspect of the invention, the number of Segmented LEDs connected to the power bus can be altered after the light source is assembled.
    Type: Application
    Filed: March 5, 2018
    Publication date: October 11, 2018
    Inventors: Ghulam HASNAIN, Syn-Yem HU, Steven D. LESTER
  • Patent number: 9913333
    Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of Segmented LEDs connected in parallel to a power bus and a controller. The power bus accepts a variable number of Segmented LEDs. The controller receives AC power and provides a power signal on the power bus. Each Segmented LED is characterized by a driving voltage that is greater than 3 times the driving voltage of a conventional LED fabricated in the same material system as the Segmented LED. The number of Segmented LEDs in the light source is chosen to compensate for variations in the light output of individual Segmented LEDs introduced by the manufacturing process. In another aspect of the invention, the number of Segmented LEDs connected to the power bus can be altered after the light source is assembled.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: March 6, 2018
    Assignee: BRIDGELUX INC.
    Inventors: Ghulam Hasnain, Syn-Yem Hu, Steven D. Lester
  • Publication number: 20170317239
    Abstract: Aspects include Light Emitting Diodes that have a GaN-based light emitting region and a metallic electrode. The metallic electrode can be physically separated from the GaN-based light emitted region by a layer of porous dielectric, which provides a reflecting region between at least a portion of the metallic electrode and the GaN-based light emitting region.
    Type: Application
    Filed: March 9, 2017
    Publication date: November 2, 2017
    Inventors: Frank T. SHUM, William W. SO, Steven D. LESTER
  • Publication number: 20170202065
    Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of Segmented LEDs connected in parallel to a power bus and a controller. The power bus accepts a variable number of Segmented LEDs. The controller receives AC power and provides a power signal on the power bus. Each Segmented LED is characterized by a driving voltage that is greater than 3 times the driving voltage of a conventional LED fabricated in the same material system as the Segmented LED. The number of Segmented LEDs in the light source is chosen to compensate for variations in the light output of individual Segmented LEDs introduced by the manufacturing process. In another aspect of the invention, the number of Segmented LEDs connected to the power bus can be altered after the light source is assembled.
    Type: Application
    Filed: March 20, 2017
    Publication date: July 13, 2017
    Inventors: Ghulam HASNAIN, Syn-Yem HU, Steven D. LESTER
  • Patent number: 9634062
    Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of Segmented LEDs connected in parallel to a power bus and a controller. The power bus accepts a variable number of Segmented LEDs. The controller receives AC power and provides a power signal on the power bus. Each Segmented LED is characterized by a driving voltage that is greater than 3 times the driving voltage of a conventional LED fabricated in the same material system as the Segmented LED. The number of Segmented LEDs in the light source is chosen to compensate for variations in the light output of individual Segmented LEDs introduced by the manufacturing process. In another aspect of the invention, the number of Segmented LEDs connected to the power bus can be altered after the light source is assembled.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: April 25, 2017
    Assignee: BRIDGELUX, INC.
    Inventors: Ghulam Hasnain, Syn-Yem Hu, Steven D. Lester
  • Patent number: 9627589
    Abstract: Aspects include Light Emitting Diodes that have a GaN-based light emitting region and a metallic electrode. The metallic electrode can be physically separated from the GaN-based light emitted region by a layer of porous dielectric, which provides a reflecting region between at least a portion of the metallic electrode and the GaN-based light emitting region.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: April 18, 2017
    Assignee: BRIDGELUX, INC.
    Inventors: Frank T. Shum, William W. So, Steven D. Lester
  • Patent number: 9472593
    Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of Segmented LEDs connected in parallel to a power bus and a controller. The power bus accepts a variable number of Segmented LEDs. The controller receives AC power and provides a power signal on the power bus. Each Segmented LED is characterized by a driving voltage that is greater than 3 times the driving voltage of a conventional LED fabricated in the same material system as the Segmented LED. The number of Segmented LEDs in the light source is chosen to compensate for variations in the light output of individual Segmented LEDs introduced by the manufacturing process. In another aspect of the invention, the number of Segmented LEDs connected to the power bus can be altered after the light source is assembled.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: October 18, 2016
    Inventors: Ghulam Hasnain, Syn-Yem Hu, Steven D. Lester
  • Publication number: 20160247975
    Abstract: Aspects include Light Emitting Diodes that have a GaN-based light emitting region and a metallic electrode. The metallic electrode can be physically separated from the GaN-based light emitted region by a layer of porous dielectric, which provides a reflecting region between at least a portion of the metallic electrode and the GaN-based light emitting region.
    Type: Application
    Filed: April 29, 2016
    Publication date: August 25, 2016
    Inventors: Frank T. SHUM, William W. SO, Steven D. LESTER
  • Patent number: 9391234
    Abstract: A light source and method for making the same are disclosed. The light source includes a conducting substrate, and a light emitting structure that is divided into segments. The light emitting structure includes a first layer of semiconductor material of a first conductivity type deposited on the substrate, an active layer overlying the first layer, and a second layer of semiconductor material of an opposite conductivity type from the first conductivity type overlying the active layer. A barrier divides the light emitting structure into first and second segments that are electrically isolated from one another. A serial connection electrode connects the first layer in the first segment to the second layer in the second segment. A power contact is electrically connected to the second layer in the first segment, and a second power contact electrically connected to the first layer in the second segment.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: July 12, 2016
    Assignee: Toshiba Corporation
    Inventors: Steven D. Lester, Chih-Wei Chuang
  • Patent number: 9356194
    Abstract: Aspects include Light Emitting Diodes that have a GaN-based light emitting region and a metallic electrode. The metallic electrode can be physically separated from the GaN-based light emitted region by a layer of porous dielectric, which provides a reflecting region between at least a portion of the metallic electrode and the GaN-based light emitting region.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: May 31, 2016
    Assignee: Bridgelux, Inc.
    Inventors: Frank T. Shum, William W. So, Steven D. Lester