Patents by Inventor Michael R Krames

Michael R Krames 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: 10557595
    Abstract: LED lamp systems having improved light quality are disclosed. The lamps emit more than 500 lm and more than 2% of the power in the spectral power distribution is emitted within a wavelength range from about 390 nm to about 430 nm.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: February 11, 2020
    Assignee: SORAA, INC.
    Inventors: Aurelien J. F. David, Troy A. Trottier, Michael R. Krames
  • Patent number: 10553754
    Abstract: A light emitting diode device has a bulk gallium and nitrogen containing substrate with an active region. The device has a lateral dimension and a thick vertical dimension such that the geometric aspect ratio forms a volumetric diode that delivers a nearly uniform current density across the range of the lateral dimension.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: February 4, 2020
    Assignee: SORAA, INC.
    Inventors: Thomas M. Katona, James W. Raring, Mark P. D'Evelyn, Michael R. Krames, Aurelien J. F. David
  • Publication number: 20190353839
    Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.
    Type: Application
    Filed: April 29, 2019
    Publication date: November 21, 2019
    Inventors: Michael R. Krames, Aurelien J. F. David, Emil Radkov, Willem Smitt
  • Publication number: 20190195441
    Abstract: LED lamp systems having improved light quality are disclosed. The lamps emit more than 500 lm and more than 2% of the power in the spectral power distribution is emitted within a wavelength range from about 390 nm to about 430 nm.
    Type: Application
    Filed: November 28, 2018
    Publication date: June 27, 2019
    Inventors: Aurelien J.F. David, Troy A. Trottier, Michael R. Krames
  • Patent number: 10324250
    Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: June 18, 2019
    Assignee: SORAA, INC.
    Inventors: Michael R. Krames, Aurelien J. F. David, Emil Radkov, Willem Smitt
  • Patent number: 10312422
    Abstract: Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: June 4, 2019
    Assignee: Lumileds LLC
    Inventors: Michael D. Camras, Michael R. Krames, Wayne L. Snyder, Frank M. Steranka, Robert C. Taber, John J. Uebbing, Douglas W. Pocius, Troy A. Trottier, Christopher H. Lowery, Gerd O. Mueller, Regina B. Mueller-Mach
  • Patent number: 10312404
    Abstract: In accordance with embodiments of the invention, at least partial strain relief in a light emitting layer of a III-nitride light emitting device is provided by configuring the surface on which at least one layer of the device grows such that the layer expands laterally and thus at least partially relaxes. This layer is referred to as the strain-relieved layer. In some embodiments, the light emitting layer itself is the strain-relieved layer, meaning that the light emitting layer is grown on a surface that allows the light emitting layer to expand laterally to relieve strain. In some embodiments, a layer grown before the light emitting layer is the strain-relieved layer. In a first group of embodiments, the strain-relieved layer is grown on a textured surface.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: June 4, 2019
    Assignee: LUMILEDS LLC
    Inventors: Sungsoo Yi, Nathan F. Gardner, Michael R. Krames, Linda T. Romano
  • Publication number: 20190160252
    Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.
    Type: Application
    Filed: October 23, 2018
    Publication date: May 30, 2019
    Inventors: MICHAEL R. KRAMES, AURELIEN J.F. DAVID
  • Patent number: 10290775
    Abstract: A semiconductor light emitting device comprising a light emitting layer disposed between an n-type region and a p-type region is combined with a ceramic layer which is disposed in a path of light emitted by the light emitting layer. The ceramic layer is composed of or includes a wavelength converting material such as a phosphor. Luminescent ceramic layers according to embodiments of the invention may be more robust and less sensitive to temperature than prior art phosphor layers. In addition, luminescent ceramics may exhibit less scattering and may therefore increase the conversion efficiency over prior art phosphor layers.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: May 14, 2019
    Assignee: Lumileds LLC
    Inventors: Gerd O. Mueller, Regina B. Mueller-Mach, Michael R. Krames, Peter J. Schmidt, Hans-Helmut Bechtel, Joerg Meyer, Jan de Graaf, Theo Arnold Kop
  • Publication number: 20190067517
    Abstract: A light emitting diode device has a bulk gallium and nitrogen containing substrate with an active region. The device has a lateral dimension and a thick vertical dimension such that the geometric aspect ratio forms a volumetric diode that delivers a nearly uniform current density across the range of the lateral dimension.
    Type: Application
    Filed: May 29, 2018
    Publication date: February 28, 2019
    Inventors: Thomas M. Katona, James W. Raring, Mark P. D'Evelyn, Michael R. Krames, Aurelien J.F. David
  • Patent number: 10168009
    Abstract: LED lamp systems having improved light quality are disclosed. The lamps emit more than 500 lm and more than 2% of the power in the spectral power distribution is emitted within a wavelength range from about 390 nm to about 430 nm.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: January 1, 2019
    Assignee: Soraa, Inc.
    Inventors: Aurelien J. F. David, Troy A. Trottier, Michael R. Krames
  • Patent number: 10147850
    Abstract: An optical device includes a light source with at least two radiation sources, and at least two layers of wavelength-modifying materials excited by the radiation sources that emit radiation in at least two predetermined wavelengths. Embodiments include a first plurality of n radiation sources configured to emit radiation at a first wavelength. The first plurality of radiation sources are in proximity to a second plurality of m of radiation sources configured to emit radiation at a second wavelength, the second wavelength being shorter than the first wavelength. The ratio between m and n is predetermined. The disclosed optical device also comprises at least two wavelength converting layers such that a first wavelength converting layer is configured to absorb a portion of radiation emitted by the second radiation sources, and a second wavelength converting layer configured to absorb a portion of radiation emitted by the second radiation sources.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: December 4, 2018
    Assignee: Soraa, Inc.
    Inventors: Michael R. Krames, Troy Trottier, Frank M. Steranka, William D. Houck, Arpan Chakraborty
  • Patent number: 10137277
    Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: November 27, 2018
    Assignee: Soraa, Inc.
    Inventors: Michael R. Krames, Aurielen J. F. David
  • Patent number: 10139056
    Abstract: LED lamp systems having improved light quality are disclosed. The lamps emit more than 500 lm and more than 2% of the power in the spectral power distribution is emitted within a wavelength range from about 390 nm to about 430 nm.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: November 27, 2018
    Assignee: Soraa, Inc.
    Inventors: Aurelien J. F. David, Troy A. Trottier, Michael R. Krames
  • Publication number: 20180320833
    Abstract: LED lamp systems having improved light quality are disclosed. The lamps emit more than 500 lm and more than 2% of the power in the spectral power distribution is emitted within a wavelength range from about 390 nm to about 430 nm.
    Type: Application
    Filed: July 10, 2018
    Publication date: November 8, 2018
    Inventors: Aurelien J.F. DAVID, Troy A. TROTTIER, Michael R. KRAMES
  • Publication number: 20180311464
    Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.
    Type: Application
    Filed: July 10, 2018
    Publication date: November 1, 2018
    Inventors: MICHAEL R. KRAMES, AURIELEN J.F. DAVID
  • Publication number: 20180269351
    Abstract: InGaN-based light-emitting devices fabricated on an InGaN template layer are disclosed.
    Type: Application
    Filed: May 22, 2018
    Publication date: September 20, 2018
    Inventors: Michael R. Krames, Mark P. D'Evelyn, Akinori Koukitu, Yoshinao Kumagai, Hisashi Murakami
  • Patent number: 10076633
    Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: September 18, 2018
    Assignee: Soraa, Inc.
    Inventors: Michael R. Krames, Aurelien J. F. David
  • Publication number: 20180175236
    Abstract: In accordance with embodiments of the invention, at least partial strain relief in a light emitting layer of a III-nitride light emitting device is provided by configuring the surface on which at least one layer of the device grows such that the layer expands laterally and thus at least partially relaxes. This layer is referred to as the strain-relieved layer. In some embodiments, the light emitting layer itself is the strain-relieved layer, meaning that the light emitting layer is grown on a surface that allows the light emitting layer to expand laterally to relieve strain. In some embodiments, a layer grown before the light emitting layer is the strain-relieved layer. In a first group of embodiments, the strain-relieved layer is grown on a textured surface.
    Type: Application
    Filed: February 15, 2018
    Publication date: June 21, 2018
    Inventors: Sungsoo Yi, Nathan F. Gardner, Michael R. Krames, Linda T. Romano
  • Publication number: 20180149802
    Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.
    Type: Application
    Filed: January 23, 2018
    Publication date: May 31, 2018
    Inventors: Michael R. Krames, Aurelien J. F. David, Emil Radkov, Willem Smitt