Patents by Inventor Karl Beeson

Karl Beeson 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: 10370328
    Abstract: Provided herein are compounds of the formula (I) as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of degenerative diseases and disorders.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: August 6, 2019
    Assignee: MUSC Foundation for Research Development
    Inventors: Craig C. Beeson, Christopher C. Lindsey, Baerbel Rohrer, Yuri Karl Peterson
  • Publication number: 20080042153
    Abstract: A wavelength conversion chip is formed by depositing a wavelength conversion material on a substrate to form a layer, removing the resulting wavelength conversion layer from the substrate and then segmenting the wavelength conversion layer into a plurality of wavelength conversion chips. The wavelength conversion material can be annealed by thermal annealing or radiation annealing to increase the wavelength conversion efficiency of the chips or to sinter the wavelength conversion material to form a ceramic material. Optical coatings, vias, light extraction elements, electrical connections or electrical bond pads can be fabricated on the wavelength conversion chips.
    Type: Application
    Filed: October 19, 2007
    Publication date: February 21, 2008
    Inventors: Karl Beeson, Scott Zimmerman, William Livesay
  • Publication number: 20070221867
    Abstract: A wavelength conversion chip is formed by depositing a wavelength conversion material layer on a substrate, segmenting the wavelength conversion layer into a plurality of wavelength conversion chips, and then removing the wavelength conversion chips from the substrate. The wavelength conversion of the chips can be increased by thermal annealing or radiation annealing of the wavelength conversion material. Optical coatings or light extraction elements can be fabricated on the wavelength conversion layer.
    Type: Application
    Filed: March 24, 2006
    Publication date: September 27, 2007
    Inventors: Karl Beeson, Scott Zimmerman, William Livesay
  • Publication number: 20070206164
    Abstract: A projection display system has at least one light-recycling illumination system and at least one imaging light modulator. The light-recycling illumination system includes a light source that is enclosed within a light-recycling cavity. The light source is a plurality of light-emitting diode that emits light, and a fraction of that light will exit the light-recycling cavity through an aperture. The light-recycling cavity recycles a portion of the light emitted by the light source back to the light source in order to enhance the luminance of the light exiting the aperture. The fraction of the light that exits the aperture is partially collimated and is directed to the imaging light modulator. The imaging light modulator spatially modulates the partially collimated light to form an image.
    Type: Application
    Filed: October 5, 2005
    Publication date: September 6, 2007
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20070085105
    Abstract: The invention is an illumination system that incorporates a light emitting diode and a side-emitting light-recycling lens. The side-emitting light-recycling lens recycles part of the light internally generated by a light emitting diode back to the light emitting diode as externally incident light. The light emitting diode reflects a portion of the recycled light, thereby increasing the effective brightness of the light emitting diode. The light reflected by the light emitting diode is directed though the side-emitting light-recycling lens and exits the illumination system, thereby increasing the output brightness and efficiency of the illumination system. The light emitting diode reflects externally incident light with a reflectivity greater than 40 percent.
    Type: Application
    Filed: October 18, 2005
    Publication date: April 19, 2007
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20070086211
    Abstract: The invention is a side-emitting illumination system that incorporates a light emitting diode. The side-emitting illumination system recycles a portion of the light internally generated by a light emitting diode back to the light emitting diode as externally incident light. The light emitting diode reflects the recycled light, thereby increasing the effective brightness of the light emitting diode. The light reflected by the light emitting diode is directed though the output aperture of the side-emitting illumination system, thereby increasing the output brightness and efficiency of the side-emitting illumination system. The light emitting diode reflects externally incident light with a reflectivity greater than 40 percent.
    Type: Application
    Filed: October 18, 2005
    Publication date: April 19, 2007
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20070018182
    Abstract: The invention is a light emitting diode that exhibits high reflectivity to externally incident light and high extraction efficiency for internally generated light. The light emitting diode includes a first reflecting electrode that reflects both externally incident light and internally generated light. A multi-layer semiconductor structure is in contact with the first reflecting layer and has an active region that emits the internally generated light in an emitting wavelength range. The multi-layer semiconductor structure has an absorption coefficient less than 50 cm?1. A second reflecting electrode underlies the multi-layer semiconductor structure and reflects both the externally incident light and the internally generated light. An array of light extracting elements extends at least part way through the multi-layer semiconductor structure and improves the extraction efficiency for the internally generated light.
    Type: Application
    Filed: July 20, 2005
    Publication date: January 25, 2007
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20070018184
    Abstract: The invention is a light emitting diode that exhibits high reflectivity to externally incident light and high extraction efficiency for internally generated light. The light emitting diode includes a first reflecting electrode that reflects both externally incident light and internally generated light. The first reflecting electrode can be a metal layer; or a transparent layer and a metal layer; or a transparent layer and a metal layer with a plurality of metal contacts extending from the reflecting metal layer through the transparent layer. A multi-layer semiconductor structure is in contact with the first reflecting layer and has an active region that emits the internally generated light in an emitting wavelength range. The multi-layer semiconductor structure has an absorption coefficient less than 50 cm?1. A second reflecting electrode underlies the multi-layer semiconductor structure and reflects both the externally incident light and the internally generated light.
    Type: Application
    Filed: March 24, 2006
    Publication date: January 25, 2007
    Inventors: Karl Beeson, Scott Zimmerman, William Livesay
  • Publication number: 20060284190
    Abstract: A light emitting diode includes a first doped semiconductor layer, an active region and a second doped semiconductor layer. The first reflective electrode of the light emitting diode is connected to the edge surfaces of the first doped semiconductor layer. The second reflective electrode includes an optically transparent layer and is connected to the second doped semiconductor layer. The second reflective electrode may include a plurality of electrically conductive contacts extending from a reflective conductive metallic layer through a transparent layer. A method is described for fabricating the light emitting diode.
    Type: Application
    Filed: June 16, 2006
    Publication date: December 21, 2006
    Inventors: Scott Zimmerman, Karl Beeson
  • Publication number: 20060214173
    Abstract: A light emitting diode includes a first doped semiconductor layer, an active region and a second doped semiconductor layer. The sectional area of the active region is less than the sectional area of the first doped semiconductor layer. One electrode of the light emitting diode is connected to the edge surfaces of the first doped semiconductor layer. The second electrode is connected to the second doped semiconductor layer. A method is described for fabricating the light emitting diode.
    Type: Application
    Filed: March 24, 2006
    Publication date: September 28, 2006
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20060203468
    Abstract: An illumination system has a light source and a wavelength conversion layer within a light-recycling envelope. The wavelength conversion layer is a solid phosphor layer. The light source is a light-emitting diode or a semiconductor laser. The light source will emit light of a first wavelength range that is transmitted through the wavelength conversion layer in order to convert a portion of the light of a first wavelength range into light of a second wavelength range. Light of both the first and second wavelength ranges will exit the light-recycling envelope through an aperture. The recycling of the light by the light-recycling envelope will enhance the output radiance and luminance of the light exiting the illumination system.
    Type: Application
    Filed: May 8, 2006
    Publication date: September 14, 2006
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20060071225
    Abstract: The invention is a light emitting diode that exhibits high reflectivity to incident light and high extraction efficiency for internally generated light. The light emitting diode includes a reflecting layer that reflects both the incident light and the internally generated light. A multi-layer semiconductor structure is deposited on the reflecting layer. The multi-layer semiconductor structure has an active layer that emits the internally generated light. An array of light extracting elements extends at least part way through the multi-layer semiconductor structure and improves the extraction efficiency for internally generated light. The light extracting elements can be an array of trenches, an array of holes, an array of ridges or an array of etched strips. The light emitting diode improves the efficiency of light recycling illumination systems.
    Type: Application
    Filed: September 28, 2004
    Publication date: April 6, 2006
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20060066192
    Abstract: This invention is an illumination system that incorporates a light emitting diode and a partially reflecting optical element. The light emitting diode emits internally generated light and reflects incident light with high reflectivity. The partially reflecting optical element transmits a first portion of the internally generated light and reflects a second portion of the internally generated light back to the light emitting diode, where the second portion is reflected by the light emitting diode. The partially reflecting optical element can be a non-absorbing reflecting polarizer or a wavelength conversion layer. Utilizing a partially reflecting optical element and light recycling can increase the effective brightness and the output efficiency of the illumination system.
    Type: Application
    Filed: September 28, 2004
    Publication date: March 30, 2006
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20060067078
    Abstract: This invention is an illumination system that incorporates a light emitting diode and a partially reflecting optical element. The light emitting diode emits internally generated light having a first angular range and reflects incident light with high reflectivity. The partially reflecting optical element transmits a first portion of the internally generated light with a second angular range, smaller than the first angular range, and reflects a second portion of the internally generated light back to the light emitting diode, where the second portion is reflected by the light emitting diode. The partially reflecting optical element can be a pyramid, an array of pyramids, a first and second orthogonal arrays of prisms or a bandpass filter. Utilizing a partially reflecting optical element and light recycling can increase the effective brightness and the output efficiency of the illumination system.
    Type: Application
    Filed: September 28, 2004
    Publication date: March 30, 2006
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20050280785
    Abstract: A projection display system has at least one light-recycling illumination system, a color scroller and an imaging light modulator. The light-recycling illumination system includes a light source that is enclosed within a light-recycling envelope. The light source is a light-emitting diode that emits light, and a fraction of that light will exit the light-recycling envelope through an aperture. The light-recycling envelope recycles a portion of the light emitted by the light source back to the light source in order to enhance the luminance of the light exiting the aperture. The fraction of the light that exits the aperture is partially collimated and is directed to a color scrolling means. The color scroller scans the partially collimated light across the face of the imaging light modulator. The imaging light modulator spatially modulates the scrolled beam of light to form an image.
    Type: Application
    Filed: June 16, 2004
    Publication date: December 22, 2005
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20050219476
    Abstract: A projection display system has at least one light-recycling illumination system and at least one imaging light modulator. The light-recycling illumination system includes a light source that is enclosed within a light-recycling envelope. The light source is a light-emitting diode that emits light, and a fraction of that light will exit the light-recycling envelope through an aperture. The light-recycling envelope recycles a portion of the light emitted by the light source back to the light source in order to enhance the luminance of the light exiting the aperture. The fraction of the light that exits the aperture is partially collimated and is directed to the imaging light modulator. The imaging light modulator spatially modulates the partially collimated light to form an image.
    Type: Application
    Filed: March 30, 2004
    Publication date: October 6, 2005
    Inventors: Karl Beeson, Scott Zimmerman
  • Publication number: 20040217702
    Abstract: A light emitting device (e.g., organic light emitting diode (OLED)) and a method for manufacturing the OLED are described herein. Basically, the OLED includes a substrate, a first conductive electrode, at least one organic layer, a second conductive electrode, an encapsulant substrate and a microstructure. The microstructure has internal refractive index variations or internal or surface physical variations that function to perturb the propagation of internal waveguide modes within the OLED and as a result allows more light to be emitted from the OLED. Several different embodiments of the microstructure that can be incorporated within an OLED are described herein.
    Type: Application
    Filed: August 8, 2003
    Publication date: November 4, 2004
    Inventors: Sean M. Garner, Venkata A. Bhagavatula, James S. Sutherland, MacRae Maxfield, Karl Beeson, Lawrence W. Shacklette, Peng Jiang, Han Zou
  • Patent number: 6542684
    Abstract: A single mode optical waveguide which is lithographically formed and employs polymeric materials having low propagation loss. The optical waveguide has a substrate, a polymeric, buffer layer having an index of refraction nb disposed on a surface of the substrate, a patterned, light-transmissive core layer having an index of refraction nc disposed directly on a surface of the cladding layer, and an overcladding layer having an index of refraction no on a top surface of the core, side walls of the core, and exposed portions of the buffer layer, with nb<no<nc and &Dgr;n=nc−no.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: April 1, 2003
    Assignee: Corning Incorporated
    Inventors: Louay Eldada, Deepti Pant, Karl Beeson, George Boudoughian
  • Publication number: 20030026569
    Abstract: A single mode optical waveguide which is lithographically formed and employs polymeric materials having low propagation loss. The optical waveguide has a substrate, a polymeric, buffer layer having an index of refraction nb disposed on a surface of the substrate, a patterned, light-transmissive core layer having an index of refraction nc disposed directly on a surface of the cladding layer, and an overcladding layer having an index of refraction no on a top surface of the core, side walls of the core, and exposed portions of the buffer layer, with nb<no<nc and &Dgr;n=nc−no.
    Type: Application
    Filed: May 1, 2001
    Publication date: February 6, 2003
    Inventors: Louay Eldada, Deepti Pant, Karl Beeson, George Boudoughian
  • Publication number: 20010019748
    Abstract: Optical diffusing structures can be fabricated from photopolymerizable material by directing light through a transparent or translucent substrate and then through the photopolymerizable material for a period of time sufficient to photopolymerize only a portion of the material. The resultant structure can be utilized as a diffuser, a viewing screen, and in other applications, and can be combined with other light-directing structures such as arrays of tapered optical waveguides.
    Type: Application
    Filed: March 15, 2001
    Publication date: September 6, 2001
    Inventors: Karl Beeson, Scott Zimmerman, Jose Diaz, Mac Maxfield