Patents by Inventor Kyung Nam Kim

Kyung Nam Kim 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: 8388863
    Abstract: The present invention relates to a phosphor for UV and long-wavelength excitation and a preparation method thereof, more particularly to a phosphor for UV and long-wavelength excitation prepared from a phosphor precursor comprising strontium, barium, zinc, silica and rare-earth metal, wherein the proportion of barium and zinc is optimized to obtain a color coordinate in the range of x=0.50-0.64 and y=0.38-0.51, and a method for preparing the same by heat-treating the phosphor precursor under a mixed gas atmosphere of nitrogen and hydrogen with specific proportion. Since heat treatment is possible even at low temperature, a phosphor for UV and long-wavelength excitation having superior luminescence characteristics and thus offering superior efficiency when applied to diodes or liquid crystal displays can be obtained without having to use conventional flux materials to lower baking temperature and without using toxic substances.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: March 5, 2013
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Joung Kyu Park, Chang Hae Kim, Kyoung Jae Choi, Kyung Nam Kim, Jae Myung Kim
  • Publication number: 20130039032
    Abstract: The present invention provides a light emitting device which comprises blue and red light emitting diode (LED) chips and at least one phosphor for emitting green light by means of light emitted from the blue LED chip, and an LCD backlight including the light emitting device. According to the light emitting device of the present invention, uniform white light can be implemented and both high luminance and wider color reproduction range can also be obtained. Accordingly, an LCD backlight for uniform light distribution on an LCD as well as low power consumption and high durability can be manufactured using the light emitting device.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 14, 2013
    Applicant: SEOUL SEMICONDUCTOR CO., LTD.
    Inventors: Kyung Nam KIM, Sang Mi PARK, Tomizo MATSUOKA
  • Publication number: 20120314287
    Abstract: The present invention relates to a luminance-enhanced film used for displays. The present invention provides a luminance enhancement film including a multilayer thin film, which can ensure the reliability to external environmental changes, such as temperature change and the like, and a backlight unit including the luminance enhancement film.
    Type: Application
    Filed: December 29, 2011
    Publication date: December 13, 2012
    Applicant: KOLON INDUSTRIES, INC.
    Inventors: Jeong Yeol Moon, A Reum Han, Kyung Nam Kim, Deug Soo Ryu, Dae Shik Kim
  • Patent number: 8323529
    Abstract: The present invention relates to a thiogallate phosphor expressed as AB2S4. The thiogallate phosphor of the present invention is configured by replacing a position A where a divalent ion is required with a trivalent element having an ion size similar to that of the element at the position A and with a monovalent element having an ion size similar to that of the element at the position A. Preferably, the trivalent and monovalent elements are replaced by the same amount. Further, the present invention relates to a white light emitting diode and is to manufacture a white light emitting diode with excellent luminous efficiency.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: December 4, 2012
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Kyung Nam Kim, Sang Mi Park, Tomizo Matsuoka
  • Patent number: 8288785
    Abstract: An LED includes a light-emitting chip, a metal member, and a housing. The light-emitting chip generates light. The light-emitting chip is arranged on the metal member. The housing is combined with the metal member to fix the metal member. The housing has an opening portion exposing at least a portion of the light-emitting chip and the metal member. The metal member includes a base metal layer, a light-reflecting layer arranged on the base metal layer, and a protection layer arranged on the light-reflecting layer and including a metal.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: October 16, 2012
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Jae-Ho Cho, Sean-Jhin Yoon, Tae-Kwang Kim, Kyung-Nam Kim
  • Patent number: 8262936
    Abstract: A phosphor is formed with a glass coating layer on a surface of a phosphor grain to have improved moisture and/or thermal stability. A method for manufacturing the phosphor comprises preparing phosphor gains excitable by light, and forming a glass coating layer on a surface of each phosphor grain. The glass coating layer may be formed by mixing the phosphor grains with a glass composition; heat-treating a mixture of the phosphor grains and the glass composition to make the glass composition melt and surround the phosphor grains; and cooling and breaking the heat-treated mixture to provide phosphors, each comprising the phosphor grain having the glass coating layer formed on a surface of the phosphor grain.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: September 11, 2012
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Kyung Nam Kim, Tomizo Matsuoka, Mi Youn Chang
  • Patent number: 8187498
    Abstract: A phosphor is formed with a glass coating layer on a surface of a phosphor grain to have improved moisture and/or thermal stability. A method for manufacturing the phosphor comprises preparing phosphor gains excitable by light, and forming a glass coating layer on a surface of each phosphor grain. The glass coating layer may be formed by mixing the phosphor grains with a glass composition; heat-treating a mixture of the phosphor grains and the glass composition to make the glass composition melt and surround the phosphor grains; and cooling and breaking the heat-treated mixture to provide phosphors, each comprising the phosphor grain having the glass coating layer formed on a surface of the phosphor grain.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: May 29, 2012
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Kyung Nam Kim, Tomizo Matsuoka, Mi Youn Chang
  • Patent number: 8177999
    Abstract: The present invention provides a red phosphor, a method for manufacturing the red phosphor and a light emitting device using the red phosphor, in which the red phosphor is expressed as a chemical formula of (Ca,Sr)1-x-yEuxPbyS, wherein 0.0005?x?0.01 and 0.001?y?0.05. According to the present invention, the red phosphor has improved reliability and luminous efficiency and thus be used to obtain a light emitting device with more excellent color reproducibility and optical characteristic.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: May 15, 2012
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Kyung Nam Kim, Sang Mi Park, Tomizo Matsuoka
  • Patent number: 8164710
    Abstract: A backlight assembly includes a light guide plate and a light-emitting module. The light guide plate guides light. The light-emitting module is disposed to face an incidence surface of the light guide plate. The light-emitting module includes a printed circuit board (PCB) vertically disposed to face the incidence surface and a plurality of LEDs mounted on the PCB to emit light toward the incidence surface. Each of the LEDs includes a blue chip emitting blue light, a red fluorescent substance and a green fluorescent substance for converting the blue light into white light. Therefore, a thickness of the backlight assembly is reduced and an LED-mounting stability of the LED is improved.
    Type: Grant
    Filed: January 19, 2009
    Date of Patent: April 24, 2012
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Dae-Won Kim, Kyung-Nam Kim, Jae-Jin Lee
  • Publication number: 20120061717
    Abstract: The present invention relates to a light-emitting diode package having a plurality of inner leads, a plurality of outer leads extending from the inner leads, a slug electrically connected to at least one of the inner leads, the slug having a thermally conductive material, a light-emitting chip arranged on the slug, and a housing supporting the light-emitting diode package.
    Type: Application
    Filed: November 22, 2011
    Publication date: March 15, 2012
    Applicant: SEOUL SEMICONDUCTOR CO., LTD.
    Inventors: Jong Kook LEE, Byoung Ki PYO, Hyuck Jung CHOI, Kyung Nam KIM, Won CHO
  • Patent number: 8088302
    Abstract: The present invention relates to a white light emitting device in which a thiogallate based phosphor capable of emitting green light and an alkaline earth metal sulfide based phosphor capable of emitting red light are arranged on an upper surface of a light emitting diode for emitting ultraviolet rays or blue light such that the mixing of the lights can result in white light with high brightness, and thus, excellent white light with high color purity and color reproducibility after color filtration.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: January 3, 2012
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Kyung Nam Kim, Sang Mi Park, Tomizo Matsuoka
  • Patent number: 8017961
    Abstract: The present invention relates to a light emitting device comprising a light emitting diode for emitting blue light or ultraviolet rays, and at least one orthosilicate based phosphor for emitting light in a green to yellow region and an alkaline earth metal sulfide based phosphor for emitting light in a red region which are installed above the light emitting diode. According to the light emitting device of the present invention, white light with a continuous spectrum ranging from green to red can be implemented such that more excellent color rendering and color reproducibility can be obtained. Therefore, the light emitting device of the present invention can used in an liquid crystal display backlight unit as well as a general lighting source and flash light source.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: September 13, 2011
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Kyung Nam Kim, Sang Mi Park, Tomizo Matsuoka
  • Patent number: 7998365
    Abstract: The present invention relates to a thiogallate phosphor which is excited by ultraviolet or blue light to emit light with a relatively longer wavelength than that of the ultraviolet or blue light. The phosphor is expressed as a general formula of (A1-x-yEuxMIIIy)(B2-yMIIy)S4, wherein 0.005<x<0.9, 0<y<0.995 and x+y<1. Here, A is at least one element selected from the group consisting of Ba, Sr and Ca, B is at least one element selected from the group consisting of Al, Ga and In, MIII is at least one rare earth element selected from the group consisting of Sc, La, Gd and Lu, and MII is at least one element consisting of Mg, Zn and Be. Accordingly, the luminous efficiency can be increased relative to the thiogallate phosphor with a general formula of AB2S4:Eu.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: August 16, 2011
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Kyung Nam Kim, Sang Mi Park, Tomizo Matsuoka
  • Publication number: 20110042704
    Abstract: A method of coating phosphor powder with a composite oxide, and a light emitting device that employs the phosphor powder coated with the composite oxide are disclosed. The method includes mixing a silicon oxide precursor and a precursor of another oxide in water and alcohol to form a primary coating layer on a sulfide phosphor through a sol-gel reaction, heat treating the primary coating layer to form a composite oxide layer of the silicon oxide and the other oxide from the primary coating layer. The method improves moisture stability of the sulfide phosphor compared to a sulfide phosphor coated with a single silicon oxide film.
    Type: Application
    Filed: November 1, 2010
    Publication date: February 24, 2011
    Applicant: SEOUL SEMICONDUCTOR CO., LTD.
    Inventors: Kyung Nam KIM, Tomizo MATSUOKA, Sang Mi PARK, Hyung Keun LEE, Mi Youn Chang
  • Publication number: 20110012507
    Abstract: A phosphor is formed with a glass coating layer on a surface of a phosphor grain to have improved moisture and/or thermal stability. A method for manufacturing the phosphor comprises preparing phosphor gains excitable by light, and forming a glass coating layer on a surface of each phosphor grain. The glass coating layer may be formed by mixing the phosphor grains with a glass composition; heat-treating a mixture of the phosphor grains and the glass composition to make the glass composition melt and surround the phosphor grains; and cooling and breaking the heat-treated mixture to provide phosphors, each comprising the phosphor grain having the glass coating layer formed on a surface of the phosphor grain.
    Type: Application
    Filed: September 16, 2010
    Publication date: January 20, 2011
    Applicant: SEOUL SEMICONDUCTOR CO., LTD.
    Inventors: Kyung Nam KIM, Tomizo MATSUOKA, Mi Youn CHANG
  • Publication number: 20110001091
    Abstract: A phosphor is formed with a glass coating layer on a surface of a phosphor grain to have improved moisture and/or thermal stability. A method for manufacturing the phosphor comprises preparing phosphor gains excitable by light, and forming a glass coating layer on a surface of each phosphor grain. The glass coating layer may be formed by mixing the phosphor grains with a glass composition; heat-treating a mixture of the phosphor grains and the glass composition to make the glass composition melt and surround the phosphor grains; and cooling and breaking the heat-treated mixture to provide phosphors, each comprising the phosphor grain having the glass coating layer formed on a surface of the phosphor grain.
    Type: Application
    Filed: September 16, 2010
    Publication date: January 6, 2011
    Applicant: SEOUL SEMICONDUCTOR CO., LTD.
    Inventors: Kyung Nam KIM, Tomizo MATSUOKA, Mi Youn CHANG
  • Publication number: 20100315835
    Abstract: An LED includes a light-emitting chip, a metal member, and a housing. The light-emitting chip generates light. The light-emitting chip is arranged on the metal member. The housing is combined with the metal member to fix the metal member. The housing has an opening portion exposing at least a portion of the light-emitting chip and the metal member. The metal member includes a base metal layer, a light-reflecting layer arranged on the base metal layer, and a protection layer arranged on the light-reflecting layer and including a metal.
    Type: Application
    Filed: July 1, 2010
    Publication date: December 16, 2010
    Applicant: Seoul Semiconductor Co., Ltd.
    Inventors: Jae-Ho Cho, Sean-Jhin Yoon, Tae-Kwang Kim, Kyung-Nam Kim
  • Patent number: 7842961
    Abstract: The present invention relates to a phosphor and a luminous element using the same. The present invention provides a phosphor for absorbing a portion of light emitted from a light source and emitting light with a wavelength different from that of the absorbed light. The phosphor comprises a fluorescent material having an alkaline earth metal-germanium metal-sulfur structure that contains Ge and at least one element selected from the group consisting of Sr and Ca and is activated by Eu. The phosphor of the present invention increases a color rendering index (CRI) of a white luminous element for a general lighting apparatus, and a luminous element using the phosphor has an advantage in that it is suitable for a white luminous element backlight which can substitute for a cold cathode fluorescent lamp (CCFL) in medium and large-sized TVs and has higher color reproducibility and higher white uniformity.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: November 30, 2010
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Kyung Nam Kim, Sang Mi Park, Tomizo Matsuoka
  • Patent number: 7820074
    Abstract: A phosphor is formed with a glass coating layer on a surface of a phosphor grain to have improved moisture and/or thermal stability. A method for manufacturing the phosphor comprises preparing phosphor grains excitable by light, and forming a glass coating layer on a surface of each phosphor grain. The glass coating layer may be formed by mixing the phosphor grains with a glass composition; heat-treating a mixture of the phosphor grains and the glass composition to make the glass composition melt and surround the phosphor grains; and cooling and breaking the heat-treated mixture to provide phosphors, each comprising the phosphor grain having the glass coating layer formed on a surface of the phosphor grain.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: October 26, 2010
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Kyung Nam Kim, Tomizo Matsuoka, Mi Youn Chang
  • Publication number: 20100224830
    Abstract: The present invention relates to a phosphor for UV and long-wavelength excitation and a preparation method thereof, more particularly to a phosphor for UV and long-wavelength excitation prepared from a phosphor precursor comprising strontium, barium, zinc, silica and rare-earth metal, wherein the proportion of barium and zinc is optimized to obtain a color coordinate in the range of x=0.50-0.64 and y=0.38-0.51, and a method for preparing the same by heat-treating the phosphor precursor under a mixed gas atmosphere of nitrogen and hydrogen with specific proportion. Since heat treatment is possible even at low temperature, a phosphor for UV and long-wavelength excitation having superior luminescence characteristics and thus offering superior efficiency when applied to diodes or liquid crystal displays can be obtained without having to use conventional flux materials to lower baking temperature and without using toxic substances.
    Type: Application
    Filed: June 20, 2006
    Publication date: September 9, 2010
    Inventors: Joung Kyu Park, Chang Hae Kim, Kyoung Jae Choi, Kyung Nam Kim, Jae Myung Kim