Patents by Inventor Sung Chul Joo

Sung Chul Joo 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: 9691949
    Abstract: Submount based light emitter components and related methods are disclosed. In some aspects, light emitter components include a ceramic submount, at least a first pair of electrical traces disposed on a first side of the submount, at least a first pair of electrical contacts disposed on a second side of the submount, at least one light emitter chip disposed on the first side of the submount, and a non-ceramic reflector disposed about the at least one light emitter chip. The first pair of electrical contacts is configured to electrical communicate with the first pair of electrical traces. The at least one chip is configured to electrically communicate with the first pair of electrical traces. At least a portion of the reflector is configured to conceal a portion of each trace of the first pair of electrical traces.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: June 27, 2017
    Assignee: Cree, Inc.
    Inventors: Jesse Colin Reiherzer, Sung Chul Joo
  • Patent number: 9583681
    Abstract: Light emitter device packages, modules and methods are disclosed having a body and a cavity that can be formed from a single substrate of material. The material can be thermally conductive and/or metallic. A light emitter device package can have at least one isolating layer creating at least a first isolated portion of the body and/or first isolated portion of the cavity. The isolating layer can be formed from the same material as the single substrate which forms the package body and cavity, and can be a layer which is thermally and electrically isolated. A light emitter or light emitter device, such as an LED chip can be mounted upon a surface of the cavity and upon at least a portion of the isolating layer.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: February 28, 2017
    Assignee: Cree, Inc.
    Inventors: Sung Chul Joo, Christopher P. Hussell
  • Publication number: 20160254423
    Abstract: Light emitting diode components are disclosed that utilize a thin, substantially flat or undomed encapsulant in order to achieve the desired emission profile to increase luminance and/or center beam candle power. Some embodiments of the devices include encapsulants, which result in an apparent source image, which does not exceed 2× the source size. Different embodiments of the present invention can comprise different configurations of emitters within the component, such as monolithic chips. The LEDs can be wire bonded to a surface. This surface can be black, reflective or include a reflective coating. In some embodiments, conversion materials can be applied conformal to the LED.
    Type: Application
    Filed: February 27, 2015
    Publication date: September 1, 2016
    Inventors: Michael John Bergmann, Jesse Reiherzer, Joseph Gates Clark, Benjamin Jacobson, Sung Chul Joo
  • Patent number: 9246060
    Abstract: Light emitting devices, packages and related methods are disclosed with electrical leads with one or more indicators. A package can include a leadframe that can include at least a first lead and a second lead. The first lead can include a first end for electrical connection to at least one light emitting device and a second end extending toward a first side of the package. The second lead can include a first end for electrical connection to at least one light emitting device and a second end extending toward a second side of the package. One or both of the second end of the first lead or the second end of the second lead can comprise an indicator serving as an identifier.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: January 26, 2016
    Assignee: Cree, Inc.
    Inventors: Sung Chul Joo, Christopher P. Hussell
  • Publication number: 20160013164
    Abstract: Light emitter devices for light emitting diodes (LED chips) and related methods are disclosed. In one embodiment a light emitter device includes a substrate and a chip on board (COB) array of LED chips disposed over the substrate. A layer having wavelength conversion material provided therein is disposed over the array of LED chips for forming a light emitting surface from which light is emitted upon activation of the LED chips. In some aspects, the wavelength conversion material includes phosphoric or lumiphoric material that is settled and/or more densely concentrated within one or more predetermined portions of the layer. In some aspects, the devices and methods provided herein can comprise a lumen density of approximately 30 lm/mm2 or greater.
    Type: Application
    Filed: April 6, 2015
    Publication date: January 14, 2016
    Inventors: Florin A. Tudorica, Christopher P. Hussell, Amber C. Abare, Peter Scott Andrews, Sung Chul Joo
  • Publication number: 20150345714
    Abstract: Submount based light emitter components and related methods are disclosed. In some aspects, light emitter components include a reflective ceramic submount, at least one light emitter chip disposed over a first surface of the submount, a layer of optical conversion material disposed over portions of each of the at least one light emitter chip and the first surface of the submount, and a lens disposed over the layer of optical conversion material. The layer of optical conversion material and the lens define separate and discrete layers over the at least one light emitter chip and submount.
    Type: Application
    Filed: May 30, 2014
    Publication date: December 3, 2015
    Inventors: Jesse Colin Reiherzer, Erin R. F. Welch, Sung Chul Joo
  • Publication number: 20150349218
    Abstract: Submount based light emitter components and related methods are disclosed. In some aspects, light emitter components include a ceramic submount, at least a first pair of electrical traces disposed on a first side of the submount, at least a first pair of electrical contacts disposed on a second side of the submount, at least one light emitter chip disposed on the first side of the submount, and a non-ceramic reflector disposed about the at least one light emitter chip. The first pair of electrical contacts is configured to electrical communicate with the first pair of electrical traces. The at least one chip is configured to electrically communicate with the first pair of electrical traces. At least a portion of the reflector is configured to conceal a portion of each trace of the first pair of electrical traces.
    Type: Application
    Filed: May 30, 2014
    Publication date: December 3, 2015
    Inventors: Jesse Colin Reiherzer, Sung Chul Joo
  • Patent number: 9123874
    Abstract: Packages containing one or more light emitting devices, such as light emitting diodes (LEDs), are disclosed. In one embodiment, LED package can include a thermal element having improved solder reliability to improve heat dissipation capacity of the LED package. LED package can include a molded plastic body having one or more LEDs attached to one or more electrical elements. The LEDs can be connected to an upper surface of the thermal element. The thermal element can include a bottom surface which can extend further away in distance from a body of the LED package than a bottom surface of the electrical element. This configuration can result in an improved connection between the LED package and an external circuitry source, thereby increasing heat transfer ability of the LED package.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: September 1, 2015
    Assignee: Cree, Inc.
    Inventors: Christopher P. Hussell, Sung Chul Joo
  • Patent number: 9099616
    Abstract: Light emitter packages and devices having improved wire bonding and related methods are disclosed. In one embodiment a light emitter package can include at least one light emitting diode (LED) chip electrically connected to an electrical element via a wire bond. The wire bond can be provided at improved wire bonding parameters such as a temperature of approximately 150° C. or less, a bonding time of approximately 100 ms or less, a power of approximately 1700 mW or less, and a force of approximately 100 grams force (gf) or less, or combinations thereof.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: August 4, 2015
    Assignee: Cree, Inc.
    Inventors: Peter Scott Andrews, Sung Chul Joo
  • Patent number: 9000470
    Abstract: Light emitter devices for light emitting diodes (LED chips) and related methods are disclosed. In one embodiment a light emitter device includes a substrate and a chip on board (COB) array of LED chips disposed over the substrate. A layer having wavelength conversion material provided therein is disposed over the array of LED chips for forming a light emitting surface from which light is emitted upon activation of the LED chips. In some aspects, the wavelength conversion material includes phosphoric or lumiphoric material that is settled and/or more densely concentrated within one or more predetermined portions of the layer. In some aspects, the devices and methods provided herein can comprise a lumen density of approximately 30 lm/mm2 or greater.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: April 7, 2015
    Assignee: Cree, Inc.
    Inventors: Florin A. Tudorica, Christopher P. Hussell, Amber C. Abare, Peter Scott Andrews, Sung Chul Joo
  • Patent number: 8860043
    Abstract: Packages, systems and methods for light emitting devices are disclosed. An LED package in one aspect can be of various sizes and configurations and can include one or more LEDs of a size smaller than those typically provided. The LED package or packages can for example be used for backlighting or other lighting fixtures. Optimized materials and techniques can be used for the LED packages to provide energy efficiency and long lifetime.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: October 14, 2014
    Assignee: Cree, Inc.
    Inventors: David T. Emerson, Christopher P. Hussell, Sung Chul Joo
  • Publication number: 20140268728
    Abstract: Light emitter components, systems, and related methods having improved optical efficiency and a lower manufacturing cost are disclosed. In one aspect, a light emitter component can include a substrate having an elongated body and first and second ends. At least a first trace and a second trace can be provided on the substrate. In some aspects, the first trace can be disposed proximate the first end of the substrate and the second trace can be disposed proximate the second end of the substrate, with no other portion of the first trace or second trace being disposed between the first and second ends of the substrate. In some aspects, a string of LED chips can be provided on the substrate. The string of LED chips can be disposed between the first and second ends of the substrate. Angled traces, gaps and light emitter components can also be provided in some aspects.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: CREE, INC.
    Inventors: Christopher P. Hussell, Sung Chul Joo, Erin Welch, Peter Scott Andrews, Joseph G. Clark, John A. Edmond, Jesse C. Reiherzer
  • Publication number: 20140217433
    Abstract: Light emitter devices for light emitting diodes (LED chips) and related methods are disclosed. In one embodiment a light emitter device includes a substrate and a chip on board (COB) array of LED chips disposed over the substrate. A layer having wavelength conversion material provided therein is disposed over the array of LED chips for forming a light emitting surface from which light is emitted upon activation of the LED chips. In some aspects, the wavelength conversion material includes phosphoric or lumiphoric material that is settled and/or more densely concentrated within one or more predetermined portions of the layer. In some aspects, the devices and methods provided herein can comprise a lumen density of approximately 30 lm/mm2 or greater.
    Type: Application
    Filed: January 30, 2014
    Publication date: August 7, 2014
    Inventors: Florin A. Tudorica, Christopher P. Hussell, Amber C. Abare, Peter Scott Andrews, Sung Chul Joo
  • Publication number: 20140159088
    Abstract: Packages containing one or more light emitting devices, such as light emitting diodes (LEDs), are disclosed. In one embodiment, LED package can include a thermal element having improved solder reliability to improve heat dissipation capacity of the LED package. LED package can include a molded plastic body having one or more LEDs attached to one or more electrical elements. The LEDs can be connected to an upper surface of the thermal element. The thermal element can include a bottom surface which can extend further away in distance from a body of the LED package than a bottom surface of the electrical element. This configuration can result in an improved connection between the LED package and an external circuitry source, thereby increasing heat transfer ability of the LED package.
    Type: Application
    Filed: December 2, 2013
    Publication date: June 12, 2014
    Applicant: CREE, INC.
    Inventors: Christopher P. Hussell, Sung Chul Joo
  • Patent number: 8610140
    Abstract: Packages, systems, and devices for light emitting diodes (LEDs) and related methods are provided. The packages can include a lead frame with an electrically conductive chip carrier comprising an upper surface. An LED can be placed on the upper surface of the electrically conductive chip carrier. A casing can be disposed on the lead frame covering at least a portion of the lead frame. A reflector cavity can be in the casing surrounding the LED. The reflector cavity can have angled side wall portions and angled end wall portions with an angle at which the side wall portions are angled that is different from an angle at which the end wall portions are angled.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: December 17, 2013
    Assignee: Cree, Inc.
    Inventors: Sung Chul Joo, Christopher P. Hussell
  • Patent number: 8598602
    Abstract: Packages containing one or more light emitting devices, such as light emitting diodes (LEDs), are disclosed. In one embodiment, LED package can include a thermal element having improved solder reliability to improve heat dissipation capacity of the LED package. LED package can include a molded plastic body having one or more LEDs attached to one or more electrical elements. The LEDs can be connected to an upper surface of the thermal element. The thermal element can include a bottom surface which can extend further away in distance from a body of the LED package than a bottom surface of the electrical element. This configuration can result in an improved connection between the LED package and an external circuitry source, thereby increasing heat transfer ability of the LED package.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: December 3, 2013
    Assignee: Cree, Inc.
    Inventors: Christopher P. Hussell, Sung Chul Joo, Robert S. Pyles
  • Patent number: D704358
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: May 6, 2014
    Assignee: Cree, Inc.
    Inventors: Sung Chul Joo, Christopher P. Hussell
  • Patent number: D708156
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: July 1, 2014
    Assignee: Cree, Inc.
    Inventors: Sung Chul Joo, Christopher P. Hussell
  • Patent number: D777122
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: January 24, 2017
    Assignee: CREE, INC.
    Inventors: Michael John Bergmann, Jesse Reiherzer, Joseph Gates Clark, Benjamin Jacobson, Sung Chul Joo
  • Patent number: D783547
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: April 11, 2017
    Assignee: CREE, INC.
    Inventors: Michael John Bergmann, Jesse Reiherzer, Joseph Gates Clark, Benjamin Jacobson, Sung Chul Joo