Patents by Inventor David G. Pelka

David G. Pelka 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: 10145606
    Abstract: An illustrative refrigeration unit door includes a transparent window portion that receives light from a light source such that the light exhibits total internal reflection within the window portion. A series of uniformly-sized prisms with non-uniform spacing ejects light from one face of the transparent window portion at angles around 60 degrees and 30 degrees. Collimated light can be used to reduce the amount of light ejected from a second face of the transparent window that is opposite the first face.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: December 4, 2018
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventor: David G. Pelka
  • Publication number: 20170307906
    Abstract: A sunglass using a transparent, pixelated, liquid crystal (LC) two-dimensional array, or functionally equivalent technology, in possible combination with optical materials to selectively attenuate or block the Sun or its reflection from the field of view (FOV) of the person wearing the glasses is disclosed. An imaging camera located within the sunglasses detects the Sun, with software determining its position via centroiding algorithms. The Solar position is then translated, and, if necessary, rotated, scaled and skewed for the appropriate pixels in the left and right lens of the sunglass, where left eye and right eye “circles” are created to block or attenuate the Sun's image from the person wearing the glasses. Additionally, the sunglass lens will have protection against the Sun's ultra-violet (UV) rays. The internal power source may be either replaceable, or charged by solar or standard methods.
    Type: Application
    Filed: April 26, 2017
    Publication date: October 26, 2017
    Inventors: Alfred David Goldsmith, David G. Pelka
  • Patent number: 9714751
    Abstract: An illumination lens includes a light incident surface that defines a cavity and has a flat top and lateral flanks, the light incident surface configured to receive light from an underlying light emitting element. The illumination lens also includes a light exiting surface having a central indentation and a surrounding toroid. The flat top has an angular range of 0 to 25° with respect to a vertical optical axis and faces the central indentation.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: July 25, 2017
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: David G Pelka, William A Parkyn
  • Patent number: 9690041
    Abstract: A light-emitting diode (LED) backlight unit includes first and second curved bottom floor reflectors exhibiting mirror image symmetry along a center line extending in a latitudinal direction, first and second sides disposed along a longitudinal direction, the first and second bottom floor reflectors disposed therebetween, first and second back reflectors disposed on distal ends of the first and second bottom floor reflectors, respectively, away from the center line, and LEDs disposed in or adjacent to the first and second back reflectors. A curvature of the first and second bottom floor reflectors respectively reach a maximum near the center line.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: June 27, 2017
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: David G Pelka, Simon Magarill
  • Patent number: 9664356
    Abstract: An illumination lens includes a light incident surface that defines a cavity and has a flat top surface and lateral flanks, the light incident surface configured to receive light from an underlying light emitting element, a light exiting surface having a central indentation and surrounding toroid, and a bottom surface connecting the light incident surface and the light exiting surface. The lateral flank includes a first region extending from the top surface and a second region extended from the first region, the second region is a curved surface, of which the center of the curvature thereof lies on the illumination lens, an intersection of the second region and a horizontal optical axis forms a first point, and the first point is disposed lower than a second point where the bottom surface and the light exiting surface intersect.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: May 30, 2017
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: David G Pelka, William A Parkyn
  • Patent number: 9631790
    Abstract: An illumination tens includes a light incident surface that defines a cavity and has a flat top surface and lateral flanks, the light incident surface configured to receive light from an underlying light emitting element, a light exiting surface having a central indentation and surrounding toroid, and a bottom surface connecting the light incident surface and the light exiting surface. The lateral flank includes a first region extending from the top surface and a second region extended from the first region, the second region is a curved surface, of which the center of the curvature thereof lies on the illumination lens, an intersection of the second region and a horizontal optical axis forms a first point, and the first point is disposed lower than a second point where the bottom surface and the light exiting surface intersect.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: April 25, 2017
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: David G Pelka, William A Parkyn
  • Patent number: 9507204
    Abstract: A light-emitting diode (LED) backlight unit includes a housing, an LED array disposed on a bottom surface of the housing, an optical film stack disposed on the LED array, and a baffled micro-optical element (BMOE) disposed between the LED array and the optical film stack. The thickness of the backlight unit is 12 mm or less, a first portion of light emitted from each LED of the LED array is configured to directly contact the optical film stack and a second portion of light emitting from each LED of the LED array is configured to be reflected off of the BMOE and onto the optical film stack, and the first and second portions of light combine to create surface illuminance on the optical film stack having a uniformity greater than 70%.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: November 29, 2016
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: David G Pelka, Meg Tidd
  • Publication number: 20150338056
    Abstract: An illumination lens includes a light incident surface that defines a cavity and has a flat top surface and lateral flanks, the light incident surface configured to receive light from an underlying light emitting element, a light exiting surface having a central indentation and surrounding toroid, and a bottom surface connecting the light incident surface and the light exiting surface. The lateral flank includes a first region extending from the top surface and a second region extended from the first region, the second region is a curved surface, of which the center of the curvature thereof lies on the illumination lens, an intersection of the second region and a horizontal optical axis forms a first point, and the first point is disposed lower than a second point where the bottom surface and the light exiting surface intersect.
    Type: Application
    Filed: July 30, 2015
    Publication date: November 26, 2015
    Inventors: David G. PELKA, William A. PARKYN
  • Publication number: 20150204509
    Abstract: An illumination tens includes a light incident surface that defines a cavity and has a flat top surface and lateral flanks, the light incident surface configured to receive light from an underlying light emitting element, a light exiting surface having a central indentation and surrounding toroid, and a bottom surface connecting the light incident surface and the light exiting surface. The lateral flank includes a first region extending from the top surface and a second region extended from the first region, the second region is a curved surface, of which the center of the curvature thereof lies on the illumination lens, an intersection of the second region and a horizontal optical axis forms a first point, and the first point is disposed lower than a second point where the bottom surface and the light exiting surface intersect.
    Type: Application
    Filed: March 30, 2015
    Publication date: July 23, 2015
    Inventors: David G. PELKA, William A. Parkyn
  • Publication number: 20150176776
    Abstract: An illumination lens includes a light incident surface that defines a cavity and has a flat top and lateral flanks, the light incident surface configured to receive light from an underlying light emitting element. The illumination lens also includes a light exiting surface having a central indentation and a surrounding toroid. The flat top has an angular range of 0 to 25° with respect to a vertical optical axis and faces the central indentation.
    Type: Application
    Filed: March 5, 2015
    Publication date: June 25, 2015
    Inventors: David G PELKA, William A Parkyn
  • Publication number: 20150168641
    Abstract: A light-emitting diode (LED) backlight unit includes first and second curved bottom floor reflectors exhibiting mirror image symmetry along a center line extending in a latitudinal direction, first and second sides disposed along a longitudinal direction, the first and second bottom floor reflectors disposed therebetween, first and second back reflectors disposed on distal ends of the first and second bottom floor reflectors, respectively, away from the center line, and LEDs disposed in or adjacent to the first and second back reflectors. A curvature of the first and second bottom floor reflectors respectively reach a maximum near the center line.
    Type: Application
    Filed: December 16, 2014
    Publication date: June 18, 2015
    Inventors: David G. PELKA, Simon Magarill
  • Patent number: 8992053
    Abstract: Exemplary embodiments of the present invention relate to wide-angle illumination patterns for short-throw lighting. An illumination lens according to an exemplary embodiment includes a light incident surface that defines a cavity and has a flat top and lateral flanks, the light incident surface being configured to receive light from an underlying light emitting element. The illumination lens also includes a light exiting surface having a central indentation and a surrounding toroid, wherein the flat top faces the central indentation.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: March 31, 2015
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: David G Pelka, William A Parkyn
  • Publication number: 20150003044
    Abstract: A light-emitting diode (LED) backlight unit includes a housing, an LED array disposed on a bottom surface of the housing, an optical film stack disposed on the LED array, and a baffled micro-optical element (BMOE) disposed between the LED array and the optical film stack. The thickness of the backlight unit is 12 mm or less, a first portion of light emitted from each LED of the LED array is configured to directly contact the optical film stack and a second portion of light emitting from each LED of the LED array is configured to be reflected off of the BMOE and onto the optical film stack, and the first and second portions of light combine to create surface illuminance on the optical film stack having a uniformity greater than 70%.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Inventors: David G. PELKA, Meg Tidd
  • Publication number: 20130343036
    Abstract: An illustrative refrigeration unit door includes a transparent window portion that receives light from a light source such that the light exhibits total internal reflection within the window portion. A series of uniformly-sized prisms with non-uniform spacing ejects light from one face of the transparent window portion at angles around 60 degrees and 30 degrees. Collimated light can be used to reduce the amount of light ejected from a second face of the transparent window that is opposite the first face.
    Type: Application
    Filed: April 24, 2012
    Publication date: December 26, 2013
    Applicant: IntelLED Corporation
    Inventor: David G. Pelka
  • Patent number: 8608328
    Abstract: A light source is disclosed. The light source includes a primary excitation source configured to emit electromagnetic radiation at a first peak wavelength and a band of wavelengths around the first peak wavelength. A secondary emitter conversion element is optically coupled to the primary excitation source and is configured to absorb at least a portion the electromagnetic radiation at the first peak wavelength from the primary excitation source and emit electromagnetic radiation at a second peak wavelength and a band of wavelengths around the second peak wavelength. The second peak wavelength is longer than the first peak wavelength. A non-imaging optical coupler is optically coupled to the secondary emitter conversion element. An optical system includes the light source optically coupled to a transparent rod.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: December 17, 2013
    Assignee: Teledyne Technologies Incorporated
    Inventors: George W. Panagotacos, David G. Pelka
  • Publication number: 20130249375
    Abstract: Anti-icing solid state aircraft lamps are disclosed. The anti-icing solid state aircraft lamp includes at least one solid state light source, a substantially optically transparent cover optically coupled to the at least one solid state light source, and at least one defroster element coupled to the optically transparent cover.
    Type: Application
    Filed: March 21, 2012
    Publication date: September 26, 2013
    Inventors: George W. Panagotacos, David G. Pelka
  • Patent number: 8534901
    Abstract: A collimating waveguide, an optical backlight apparatus, and a method of producing a collimated beam of radiant electromagnetic energy are disclosed. A collimating waveguide comprises an input surface to receive radiant electromagnetic energy from a point source and an output surface to emit an output beam of substantially collimated radiant electromagnetic energy. A first collimating surface of the waveguide receives a beam of the radiant electromagnetic energy entering from the input surface traveling in a first direction and reflects the radiant electromagnetic energy into a substantially collimated beam of radiant electromagnetic energy traveling in a second direction, which is the reverse of the first direction. A second collimating surface of the waveguide receives the substantially collimated beam of radiant electromagnetic energy and to redirect the substantially collimated beam toward the output surface.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: September 17, 2013
    Assignee: Teledyne Reynolds, Inc.
    Inventors: George W. Panagotacos, David G. Pelka, Blair L Unger
  • Publication number: 20130229810
    Abstract: Exemplary embodiments of the present invention relate to wide-angle illumination patterns for short-throw lighting. An illumination lens according to an exemplary embodiment includes a light incident surface that defines a cavity and has a flat top and lateral flanks, the light incident surface being configured to receive light from an underlying light emitting element. The illumination lens also includes a light exiting surface having a central indentation and a surrounding toroid, wherein the flat top faces the central indentation.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 5, 2013
    Applicant: Seoul Semiconductor Co., Ltd.
    Inventors: David G Pelka, William A. Parkyn
  • Patent number: 8358081
    Abstract: A lamp assembly including one or more light emitting diode (LED) arrays and a controller circuit to output a current to the one or more LED arrays. Each LED array includes at least one LED and defines a spatial radiation pattern having a first central axis. The lamp assembly also includes a lens array to redirect light received from the one or more LED arrays, a base and a light-transmissive cover. For each one of the one or more LED arrays, the lens array includes a total internal reflection (TIR) lens defining a second central axis aligned with the first central axis of the corresponding LED array. The TIR lens is configured to distribute light received from the LED array from an output face of the TIR lens such that the distributed light defines optical paths that are convergent, divergent or collimated with respect to the second central axis. The base includes a first surface to receive the one or more LED arrays, the controller circuit and the lens array.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: January 22, 2013
    Assignee: Teledyne Technologies Incorporated
    Inventors: George W. Panagotacos, David G. Pelka
  • Publication number: 20120281389
    Abstract: A light source is disclosed. The light source includes a primary excitation source configured to emit electromagnetic radiation at a first peak wavelength and a band of wavelengths around the first peak wavelength. A secondary emitter conversion element is optically coupled to the primary excitation source and is configured to absorb at least a portion the electromagnetic radiation at the first peak wavelength from the primary excitation source and emit electromagnetic radiation at a second peak wavelength and a band of wavelengths around the second peak wavelength. The second peak wavelength is longer than the first peak wavelength. A non-imaging optical coupler is optically coupled to the secondary emitter conversion element. An optical system includes the light source optically coupled to a transparent rod.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 8, 2012
    Applicant: Teledyne Technologies Incorporated
    Inventors: George W. Panagotacos, David G. Pelka