Patents by Inventor Theodore Chung

Theodore Chung 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: 11939129
    Abstract: Methods and apparatus for vacuum forming a beverage carrier yoke are described. The yoke comprises a number (e.g., four or six) collars interconnected by a web, and each collar exhibits dimensions—including a nominal diameter and a substantially uniform thickness—selected to improve strength and increase comfort. The yoke is produced using a slurry comprising a moisture barrier and a fiber base.
    Type: Grant
    Filed: October 26, 2020
    Date of Patent: March 26, 2024
    Assignee: FOOTPRINT INTERNATIONAL, LLC
    Inventors: Yoke Dou Chung, Brandon Michael Moore, Yiyun Zhang, Michael Theodore Lembeck
  • Patent number: 11322650
    Abstract: A light-emitting device is disclosed. The light emitting device includes an electron blocking layer, a hole blocking layer, wherein at least a portion of the hole blocking layer is arranged to have a compressive strain, and an active layer disposed between the hole blocking layer and the electron blocking layer.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: May 3, 2022
    Assignee: Lumileds LLC
    Inventors: Lekhnath Bhusal, Theodore Chung, Parijat Deb
  • Publication number: 20210066545
    Abstract: A light-emitting device is disclosed. The light emitting device includes an electron blocking layer, wherein at least a portion of the electron blocking layer is arranged to have a tensile strain, a hole blocking layer, wherein at least a portion of the hole blocking layer is arranged to have a compressive strain, and an active layer disposed between the hole blocking layer and the electron blocking layer.
    Type: Application
    Filed: July 12, 2018
    Publication date: March 4, 2021
    Applicant: Lumileds LLC
    Inventors: Lekhnath BHUSAL, Theodore CHUNG, Parijat DEB
  • Patent number: 10522717
    Abstract: A light-emitting device is disclosed. The light emitting device includes an electron blocking layer, a hole blocking layer, wherein at least a portion of the hole blocking layer is arranged to have a compressive strain, and an active layer disposed between the hole blocking layer and the electron blocking layer. The active layer may include a first barrier layer arranged to have a tensile strain, a second barrier layer arranged to have a tensile strain, and a first well layer disposed between the first barrier layer and the second barrier layer. The active layer may also include a first unstrained barrier layer, a second unstrained barrier layer, and a second well layer disposed between the first unstrained barrier layer and the second unstrained barrier layer.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: December 31, 2019
    Assignee: Lumileds LLC
    Inventors: Lekhnath Bhusal, Theodore Chung, Parijat Deb
  • Publication number: 20190035977
    Abstract: A light-emitting device is disclosed. The light emitting device includes an electron blocking layer, a hole blocking layer, wherein at least a portion of the hole blocking layer is arranged to have a compressive strain, and an active layer disposed between the hole blocking layer and the electron blocking layer. The active layer may include a first barrier layer arranged to have a tensile strain, a second barrier layer arranged to have a tensile strain, and a first well layer disposed between the first barrier layer and the second barrier layer. The active layer may also include a first unstrained barrier layer, a second unstrained barrier layer, and a second well layer disposed between the first unstrained barrier layer and the second unstrained barrier layer.
    Type: Application
    Filed: September 25, 2018
    Publication date: January 31, 2019
    Applicant: Lumileds LLC
    Inventors: Lekhnath Bhusal, Theodore Chung, Parijat Deb
  • Patent number: 10141477
    Abstract: A light-emitting device is disclosed. The light emitting device includes an electron blocking layer, a hole blocking layer, wherein at least a portion of the hole blocking layer is arranged to have a compressive strain, and an active layer disposed between the hole blocking layer and the electron blocking layer.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: November 27, 2018
    Assignee: Lumileds LLC
    Inventors: Lekhnath Bhusal, Theodore Chung, Parijat Deb
  • Publication number: 20180033912
    Abstract: A device includes a semiconductor structure comprising a III-P light emitting layer disposed between an n-type region and a p-type region. The n-type region includes a superlattice. The superlattice includes a plurality of stacked layer pairs, each layer pair including a first layer and a second layer. The first layer has a smaller aluminum composition than the second layer.
    Type: Application
    Filed: July 26, 2017
    Publication date: February 1, 2018
    Inventors: Lekhnath Bhusal, Theodore Chung, Suk Choi, Erik C. Nelson, Parijat P. Deb
  • Patent number: 9054232
    Abstract: A method for fabricating an epitaxial structure includes providing a substrate (102, 202, 302, 402) and a heterojunction stack on a first side the substrate, and forming a GaN light emitting diode stack (134) on a second side of the substrate. The heterojunction stack includes an undoped gallium nitride (GaN) layer and a doped aluminum gallium nitride (AIGaN) layer on the undoped GaN layer. The GaN light emitting diode stack (134) includes an n-type GaN layer (136) over the substrate, a GaN/indium gallium nitride (InGaN) multiple quantum well (MQW) structure (138) over the n-type GaN layer, a p-type AIGaN layer (140) over the n-type GaN/InGaN MQW structure, and a p-type GaN layer (142) over the p-type AIGaN layer.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: June 9, 2015
    Assignee: Koninklijke Philips N.V.
    Inventor: Theodore Chung
  • Publication number: 20150014628
    Abstract: A method for fabricating an epitaxial structure includes providing a substrate (102, 202, 302, 402) and a heterojunction stack on a first side the substrate, and forming a GaN light emitting diode stack (134) on a second side of the substrate. The heterojunction stack includes an undoped gallium nitride (GaN) layer and a doped aluminum gallium nitride (AIGaN) layer on the undoped GaN layer. The GaN light emitting diode stack (134) includes an n-type GaN layer (136) over the substrate, a GaN/indium gallium nitride (InGaN) multiple quantum well (MQW) structure (138) over the n-type GaN layer, a p-type AIGaN layer (140) over the n-type GaN/InGaN MQW structure, and a p-type GaN layer (142) over the p-type AIGaN layer.
    Type: Application
    Filed: February 28, 2013
    Publication date: January 15, 2015
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventor: Theodore Chung
  • Patent number: 8816368
    Abstract: A device includes a semiconductor structure with at least one III-P light emitting layer disposed between an n-type region and a p-type region. The semiconductor structure further includes a GaAsxP1-x p-contact layer, wherein x<0.45. A first metal contact is in direct contact with the GaAsxP1-x p-contact layer. A second metal contact is electrically connected to the n-type region. The first and second metal contacts are formed on a same side of the semiconductor structure.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: August 26, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Theodore Chung, Anneli Munkholm
  • Publication number: 20110284891
    Abstract: A device includes a semiconductor structure with at least one III-P light emitting layer disposed between an n-type region and a p-type region. The semiconductor structure further includes a GaAsxP1-x p-contact layer, wherein x<0.45. A first metal contact is in direct contact with the GaAsxP1-x p-contact layer. A second metal contact is electrically connected to the n-type region. The first and second metal contacts are formed on a same side of the semiconductor structure.
    Type: Application
    Filed: August 8, 2011
    Publication date: November 24, 2011
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: THEODORE CHUNG, ANNELI MUNKHOLM
  • Patent number: 8017958
    Abstract: A device includes a semiconductor structure with at least one III-P light emitting layer disposed between an n-type region and a p-type region. The semiconductor structure further includes a GaAsxP1?x p-contact layer, wherein x<0.45. A first metal contact is in direct contact with the GaAsxP1?x p-contact layer. A second metal contact is electrically connected to the n-type region. The first and second metal contacts are formed on a same side of the semiconductor structure.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: September 13, 2011
    Assignees: Koninklijke Philips Electronics N.V., Philips Lumileds Lighting Co., LLC
    Inventors: Theodore Chung, Anneli Munkholm
  • Patent number: 7955270
    Abstract: An improved method and apparatus for respiratory audio-visual biofeedback are disclosed. A guide patterned after a breathing cycle comfortable to the patient serves as a target. The target is displayed as a bar moving vertically upward during inhale and vertically downward during exhale, between fixed end ex-hale and end in-hale limits. The patient's current respiratory position is also displayed as a bar, oriented parallel to the target bar so that the difference between the current position and the target position is easy for the patient to see.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: June 7, 2011
    Assignee: Stanford University
    Inventors: Paul Keall, Rohini George, Radhe Mohan, Keith Miller, Theodore Chung
  • Publication number: 20100327299
    Abstract: A device includes a semiconductor structure with at least one III-P light emitting layer disposed between an n-type region and a p-type region. The semiconductor structure further includes a GaAsxP1-x p-contact layer, wherein x<0.45. A first metal contact is in direct contact with the GaAsxP1-x p-contact layer. A second metal contact is electrically connected to the n-type region. The first and second metal contacts are formed on a same side of the semiconductor structure.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V., PHILIPS LUMILEDS LIGHTING COMPANY, LLC
    Inventors: Theodore Chung, Anneli Munkholm
  • Publication number: 20070093723
    Abstract: An improved method and apparatus for respiratory audio-visual biofeedback are disclosed. A guide patterned after a breathing cycle comfortable to the patient serves as a target. The target is displayed as a bar moving vertically upward during inhale and vertically downward during exhale, between fixed end ex-hale and end in-hale limits. The patient's current respiratory position is also displayed as a bar, oriented parallel to the target bar so that the difference between the current position and the target position is easy for the patient to see.
    Type: Application
    Filed: October 4, 2006
    Publication date: April 26, 2007
    Inventors: Paul Keall, Rohini George, Radhe Mohan, Keith Miller, Theodore Chung