Patents by Inventor David N. Randolph

David N. Randolph 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: 20230307586
    Abstract: Semiconductor packages and more particularly mounting arrangements for semiconductor packages and related methods are disclosed. Mounting arrangements include metal pads on substrates and selectively placed solder material on various portions of the metal pads. Semiconductor packages may be initially positioned on the solder material and on portions of the metal pads. During solder reflow, the solder material may spread along portions of the metal pads that were previously uncovered by the solder material and effectively move the semiconductor packages. Specific arrangements of metal pad and selective solder material patterns may be provided that control directions of such movements during reflow. Resulting mounting positions of semiconductor packages may be provided with spacings that are closer than limits of pick and place equipment used to initially position the semiconductor packages.
    Type: Application
    Filed: March 25, 2022
    Publication date: September 28, 2023
    Inventors: Timothy Ling, Ryan Mohn, David N. Randolph, David Peoples, Wooh Jae Kim
  • Patent number: 11002442
    Abstract: The present disclosure relates to a lighting fixture that is configured to transfer heat that is generated by a light source and any associated electronics toward the front of the lighting fixture. The lighting fixture includes a heat spreading cup that is formed from a material that efficiently conducts heat and a light source that is coupled inside the heat spreading cup. The heat spreading cup has a bottom panel, a rim, and at least one sidewall extending between the bottom panel and the rim. The light source is coupled inside the heat spreading cup to the bottom panel and configured to emit light in a forward direction through an opening formed by the rim. Heat generated by the light source during operation is transferred radially outward along the bottom panel and in a forward direction along the at least one sidewall toward the rim of the heat spreading cup.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: May 11, 2021
    Assignee: IDEAL Industries Lighting LLC
    Inventors: David N. Randolph, John R. Rowlette, Jr.
  • Patent number: 10734560
    Abstract: A device for an LED has a substrate and a circuit on the substrate configured to accept the LED. The circuit includes a first set of electrical traces terminating at a first set of solder pads for a first sized LED, a second set of electrical traces terminating at a second set of solder pads for a second sized LED different from the first sized LED, and peripheral electrical traces for electrically interconnecting electrical traces of the first set of electrical traces or between electrical traces of the second set of electrical traces. Connection components electrically interconnect the first set of electrical traces with each other or the electrical traces of the second set of electrical traces with each other, respectively, at corresponding solder pads. The device is configurable to provide a first voltage and a second voltage to the LED.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: August 4, 2020
    Assignee: Cree, Inc.
    Inventors: David N. Randolph, Ryan C. Mohn
  • Patent number: 10436971
    Abstract: In one aspect, light fixtures are described herein employing waveguide components for delivery of directional light to wall surfaces and/or surfaces outside the general down lighting distribution of the fixture. A light fixture comprises a light source component in an optic assembly, the light source component comprising a first light source providing a down lighting distribution and a second light source coupled to a waveguide component of the optic assembly providing one or more lateral lighting distributions from the light fixture. The waveguide component comprises at least one waveguide optic comprising a body and a light extraction face, the light extraction face forming one or more sidewall portions of the optic assembly.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: October 8, 2019
    Assignee: Ideal Industries Lighting, LLC
    Inventor: David N. Randolph
  • Publication number: 20190234606
    Abstract: The present disclosure relates to a lighting fixture that is configured to transfer heat that is generated by a light source and any associated electronics toward the front of the lighting fixture. The lighting fixture includes a heat spreading cup that is formed from a material that efficiently conducts heat and a light source that is coupled inside the heat spreading cup. The heat spreading cup has a bottom panel, a rim, and at least one sidewall extending between the bottom panel and the rim. The light source is coupled inside the heat spreading cup to the bottom panel and configured to emit light in a forward direction through an opening formed by the rim. Heat generated by the light source during operation is transferred radially outward along the bottom panel and in a forward direction along the at least one sidewall toward the rim of the heat spreading cup.
    Type: Application
    Filed: March 15, 2019
    Publication date: August 1, 2019
    Inventors: David N. Randolph, John R. Rowlette, JR.
  • Publication number: 20190165229
    Abstract: A device for an LED has a substrate and a circuit on the substrate configured to accept the LED. The circuit includes a first set of electrical traces terminating at a first set of solder pads for a first sized LED, a second set of electrical traces terminating at a second set of solder pads for a second sized LED different from the first sized LED, and peripheral electrical traces for electrically interconnecting electrical traces of the first set of electrical traces or between electrical traces of the second set of electrical traces. Connection components electrically interconnect the first set of electrical traces with each other or the electrical traces of the second set of electrical traces with each other, respectively, at corresponding solder pads. The device is configurable to provide a first voltage and a second voltage to the LED.
    Type: Application
    Filed: November 29, 2017
    Publication date: May 30, 2019
    Inventors: David N. Randolph, Ryan C. Mohn
  • Patent number: 10274183
    Abstract: The present disclosure relates to a lighting fixture that is configured to transfer heat that is generated by a light source and any associated electronics toward the front of the lighting fixture. The lighting fixture includes a heat spreading cup that is formed from a material that efficiently conducts heat and a light source that is coupled inside the heat spreading cup. The heat spreading cup has a bottom panel, a rim, and at least one sidewall extending between the bottom panel and the rim. The light source is coupled inside the heat spreading cup to the bottom panel and configured to emit light in a forward direction through an opening formed by the rim. Heat generated by the light source during operation is transferred radially outward along the bottom panel and in a forward direction along the at least one sidewall toward the rim of the heat spreading cup.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: April 30, 2019
    Assignee: Cree, Inc.
    Inventors: David N. Randolph, John R. Rowlette, Jr.
  • Publication number: 20180210135
    Abstract: In one aspect, light fixtures are described herein employing waveguide components for delivery of directional light to wall surfaces and/or surfaces outside the general down lighting distribution of the fixture. A light fixture comprises a light source component in an optic assembly, the light source component comprising a first light source providing a down lighting distribution and a second light source coupled to a waveguide component of the optic assembly providing one or more lateral lighting distributions from the light fixture. The waveguide component comprises at least one waveguide optic comprising a body and a light extraction face, the light extraction face forming one or more sidewall portions of the optic assembly.
    Type: Application
    Filed: January 23, 2017
    Publication date: July 26, 2018
    Inventor: David N. RANDOLPH
  • Patent number: 9877374
    Abstract: A system includes at least one light-emitting device configured to be mounted on a stationary structure, such as a lighting pole or parking structure. A control circuit is operatively coupled to the at least one light-emitting device and configured to detect an object in a vicinity of the at least one light-emitting device and to vary a characteristic of illumination produced by the at least one light-emitting device responsive to the detection of the object.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: January 23, 2018
    Assignee: Cree, Inc.
    Inventor: David N. Randolph
  • Patent number: 9441819
    Abstract: An LES is a surface from which light emanates from a lighting fixture. The present disclosure relates to a providing a lighting fixture that has an actual light emitting surface (A-LES), which is substantially smaller than the maximum potential LES (M-LES) for the lighting fixture. The M-LES is defined as the theoretical maximum LES for the mounting structure of the lighting fixture, and the A-LES is defined as the actual LES of the lighting fixture, as dictated by the lens or optical structures of the lighting fixture. The A-LES may provide an LES that is not only smaller, but also shaped differently, from the M-LES, to help control the light output of the lighting fixture based on the lighting application.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: September 13, 2016
    Assignee: Cree, Inc.
    Inventors: David N. Randolph, John R. Rowlette, Jr., Craig Thomas Curtis
  • Patent number: 9429296
    Abstract: An LES is a surface from which light emanates from a lighting fixture. The present disclosure relates to a providing a lighting fixture that has an actual light emitting surface (A-LES), which is substantially smaller than the maximum potential LES (M-LES) for the lighting fixture. The M-LES is defined as the theoretical maximum LES for the mounting structure of the lighting fixture, and the A-LES is defined as the actual LES of the lighting fixture, as dictated by the lens or optical structures of the lighting fixture. The A-LES may provide an LES that is not only smaller, but also shaped differently, from the M-LES, to help control the light output of the lighting fixture based on the lighting application.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: August 30, 2016
    Assignee: Cree, Inc.
    Inventors: David N. Randolph, John R. Rowlette, Jr., Craig Thomas Curtis
  • Publication number: 20160150614
    Abstract: A system includes at least one light-emitting device configured to be mounted on a stationary structure, such as a lighting pole or parking structure. A control circuit is operatively coupled to the at least one light-emitting device and configured to detect an object in a vicinity of the at least one light-emitting device and to vary a characteristic of illumination produced by the at least one light-emitting device responsive to the detection of the object.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 26, 2016
    Inventor: David N. Randolph
  • Patent number: 9022599
    Abstract: A lighting component having an optic is provided. The optic includes a body formed from a plurality of partial elliptical bodies. Each partial elliptical body is substantially elliptical about a source focal point and a common focal point. Each source focal point for the partial elliptical bodies is disparately located and each common focal point for the plurality of partial elliptical bodies is collocated. The body of the optic has a common outlet proximate the common focal point and a plurality of source inlets where each source inlet of the plurality of source inlets is proximate the source focal point for a corresponding one of the plurality of partial elliptical tubes.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 5, 2015
    Assignee: Cree, Inc.
    Inventor: David N. Randolph
  • Patent number: 9022616
    Abstract: The disclosure relates to a lighting fixture having a base, a solid-state light source, and a lens assembly. The optic has a body with a cavity and a proximal opening. The lens assembly is coupled to the base at the proximal opening. The solid-state light source is mounted to the base and is configured to direct light into the cavity via the proximal opening. At least a portion of an interior surface of the body includes a number of elongated prisms. At least a portion of the exterior surface of the body includes a number of diffusers.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 5, 2015
    Assignee: Cree, Inc.
    Inventor: David N. Randolph
  • Publication number: 20140268732
    Abstract: A lighting component having an optic is provided. The optic includes a body formed from a plurality of partial elliptical bodies. Each partial elliptical body is substantially elliptical about a source focal point and a common focal point. Each source focal point for the partial elliptical bodies is disparately located and each common focal point for the plurality of partial elliptical bodies is collocated. The body of the optic has a common outlet proximate the common focal point and a plurality of source inlets where each source inlet of the plurality of source inlets is proximate the source focal point for a corresponding one of the plurality of partial elliptical tubes.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: CREE, INC.
    Inventor: David N. Randolph
  • Publication number: 20140268791
    Abstract: Lighting fixtures for solid-state light sources are disclosed. In one embodiment, a lighting fixture has a housing and one or more solid-state lighting sources mounted within the housing. The housing has a body, a lens assembly, and a removable lens adapter. To provide ambient lighting, the one or more solid-state lighting sources are mounted within the housing to emit light through the lens assembly. With regard to the lens assembly, the removable lens adapter is removably attached to the body of the housing so as to mount the lens assembly on the body. Since the removable lens adapter can be removed, different lens assemblies and different removable lens adapters can be selected to be used with the lighting fixture. Thus, the removable lens adapter and lens assembly can be selected from among a variety of different design choices so that the lighting fixture is tailored to a particular application.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: CREE, INC.
    Inventor: David N. Randolph
  • Publication number: 20140268885
    Abstract: The disclosure relates to a lighting fixture having a base, a solid-state light source, and a lens assembly. The optic has a body with a cavity and a proximal opening. The lens assembly is coupled to the base at the proximal opening. The solid-state light source is mounted to the base and is configured to direct light into the cavity via the proximal opening. At least a portion of an interior surface of the body includes a number of elongated prisms. At least a portion of the exterior surface of the body includes a number of diffusers.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: CREE, INC.
    Inventor: David N. Randolph
  • Publication number: 20140063818
    Abstract: An LES is a surface from which light emanates from a lighting fixture. The present disclosure relates to a providing a lighting fixture that has an actual light emitting surface (A-LES), which is substantially smaller than the maximum potential LES (M-LES) for the lighting fixture. The M-LES is defined as the theoretical maximum LES for the mounting structure of the lighting fixture, and the A-LES is defined as the actual LES of the lighting fixture, as dictated by the lens or optical structures of the lighting fixture. The A-LES may provide an LES that is not only smaller, but also shaped differently, from the M-LES, to help control the light output of the lighting fixture based on the lighting application.
    Type: Application
    Filed: November 6, 2013
    Publication date: March 6, 2014
    Applicant: Cree, Inc.
    Inventors: David N. Randolph, John R. Rowlette, JR., Craig Thomas Curtis
  • Patent number: D710048
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: July 29, 2014
    Assignee: Cree, Inc.
    Inventors: David N. Randolph, John R. Rowlette, Jr.
  • Patent number: D718897
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 2, 2014
    Assignee: Cree, Inc.
    Inventor: David N. Randolph