Patents by Inventor Chang Hoon Kwak

Chang Hoon Kwak 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: 20110309325
    Abstract: A light source module using quantum dots, a backlight unit employing the light source module, a display apparatus, and an illumination apparatus. The light source module includes a light emitting device package including a plurality of light emitting device chips, and a quantum dot sealing package disposed on the light emitting device package in a light emitting direction, and converts wavelengths of light emitted from the light emitting device chips to generate wavelength-converted light.
    Type: Application
    Filed: July 29, 2010
    Publication date: December 22, 2011
    Inventors: Il-woo Park, Chang-hoon Kwak, Hyo-jin Lee
  • Publication number: 20110303940
    Abstract: There is provided a light emitting device package using a quantum dot, an illumination apparatus and a display apparatus. The light emitting device package includes a light emitting device; a sealing part disposed in a path of light emitted from the light emitting device and having a lens shape; and a wavelength conversion part sealed within the sealing part and including a quantum dot. The light emitting device package uses the quantum dot as the wavelength conversion part to thereby achieve superior color reproducibility and light emission efficiency, and facilitates the control of color coordinates by adjusting the particle size and concentration of the quantum dot.
    Type: Application
    Filed: June 13, 2011
    Publication date: December 15, 2011
    Inventors: Hyo Jin LEE, Il Woo Park, Chang Hoon Kwak
  • Publication number: 20110266584
    Abstract: Provided is a white light emitting diode (LED) including a blue LED chip; and yellow, green, and red light emitting phosphors that are coated on the blue LED chip at a predetermined mixing ratio and converts light, emitted from the blue LED chip, into white light.
    Type: Application
    Filed: July 14, 2011
    Publication date: November 3, 2011
    Applicant: Samsung LED Co., Ltd.
    Inventors: Jong Rak SOHN, Chul Soo Yoon, Chang Hoon Kwak, Il Woo Park
  • Publication number: 20110260192
    Abstract: A light emitting diode (LED) package using a liquid crystal polymer, includes: a package main body formed by using a liquid crystal polymer; a lead frame formed on the package main body; an LED chip mounted on the lead frame; and a resin packaging unit encapsulating the LED chip, the resin packaging unit including phosphors. The LED package is highly reliable.
    Type: Application
    Filed: October 1, 2009
    Publication date: October 27, 2011
    Inventors: Chang Hoon Kwak, II Woo Park, Jong Rak Sohn, Hyo Jin Lee, Na Na Park, Seong Ah Joo
  • Publication number: 20110248299
    Abstract: The present invention relates to a light emitting diode package and a method of fabricating the same capable of uniformly distributing a fluorescent substance in a molding member by including a light emitting diode chip on a package substrate and the molding member having a molding resin, a fluorescent substance and nano particles, which is arranged on the package substrate, with covering the light emitting diode chip.
    Type: Application
    Filed: April 8, 2010
    Publication date: October 13, 2011
    Inventors: Na-Na PARK, Chang-Hoon KWAK, Il-Woo Park
  • Patent number: 8012792
    Abstract: The invention provides a high quality composite phosphor powder which ensures diversity in emission spectrum, color reproduction index, color temperature and color, a light emitting device using the same and a method for manufacturing the composite phosphor powder. The composite phosphor powder comprises composite particles. Each of the composite particles includes at least two types of phosphor particles and a light transmitting binder. The phosphor particles have different emission spectrums. In addition, the light transmitting binder is formed between the phosphor particles and binds them together.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: September 6, 2011
    Assignee: Samsung LED Co., Ltd.
    Inventors: Chulsoo Yoon, Joon Ho Yoon, Chang Hoon Kwak, Yun Seup Chung
  • Patent number: 7999456
    Abstract: Provided is a white light emitting diode (LED) including a blue LED chip; and yellow, green, and red light emitting phosphors that are coated on the blue LED chip at a predetermined mixing ratio and converts light, emitted from the blue LED chip, into white light.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: August 16, 2011
    Assignee: Samsung LED Co., Ltd.
    Inventors: Jong Rak Sohn, Chul Soo Yoon, Chang Hoon Kwak, Il Woo Park
  • Patent number: 7911127
    Abstract: The present invention relates to phosphor blend for wavelength conversion and a white light emitting device using the same. The phosphor blend of the invention comprises three phosphors, A5(PO4)3Cl:Eu2+, D2SiO4:Eu and MS:Eu at a composition where near ultraviolet radiation is converted into light positioned at a CIE coordinate (x, y), where 0.25?x?0.45 and 0.25?y?0.43, wherein A comprises at least one of Sr, Ca, Ba, and Mg, D comprises at least one of Ba, Sr, and Ca, and M comprises at least one of Sr and Ca. Furthermore, the present invention provides a new white light emitting device in combination of the phosphor blend and a near ultraviolet LED.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: March 22, 2011
    Assignee: Samsung LED Co., Ltd.
    Inventors: Jong Rak Sohn, Il Woo Park, Yun Seup Chung, Chang Hoon Kwak, Chul Soo Yoon, Joon Ho Yoon
  • Publication number: 20110031521
    Abstract: The invention provides a high quality composite phosphor powder which ensures diversity in emission spectrum, color reproduction index, color temperature and color, a light emitting device using the same and a method for manufacturing the composite phosphor powder. The composite phosphor powder comprises composite particles. Each of the composite particles includes at least two types of phosphor particles and a light transmitting binder. The phosphor particles have different emission spectrums. In addition, the light transmitting binder is formed between the phosphor particles and binds them together.
    Type: Application
    Filed: October 21, 2010
    Publication date: February 10, 2011
    Applicant: SAMSUNG LED CO., LTD.
    Inventors: Chulsoo YOON, Joon Ho Yoon, Chang Hoon Kwak, Yun Seup Chung
  • Patent number: 7832312
    Abstract: The invention provides a high quality composite phosphor powder which ensures diversity in emission spectrum, color reproduction index, color temperature and color, a light emitting device using the same and a method for manufacturing the composite phosphor powder. The composite phosphor powder comprises composite particles. Each of the composite particles includes at least two types of phosphor particles and a light transmitting binder. The phosphor particles have different emission spectrums. In addition, the light transmitting binder is formed between the phosphor particles and binds them together.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: November 16, 2010
    Assignee: Samsung LED Co., Ltd.
    Inventors: Chulsoo Yoon, Joon Ho Yoon, Chang Hoon Kwak, Yun Seup Chung
  • Publication number: 20100283382
    Abstract: A white light emitting device including: a blue light emitting diode (LED); a green silicate phosphor formed on the blue LED; and a red sulfide phosphor with a surface coated with a silicone oxide layer, the red sulfide phosphor formed on the blue LED.
    Type: Application
    Filed: January 17, 2008
    Publication date: November 11, 2010
    Inventors: Chang Hoon Kwak, Young Mok Lee, Il Woo Park, Jong Rak Sohn, Chul Soo Yoon
  • Patent number: 7804239
    Abstract: Provided is a white light emitting diode (LED) including a blue LED chip; and yellow, green, and red light emitting phosphors that are coated on the blue LED chip at a predetermined mixing ratio and converts light, emitted from the blue LED chip, into white light.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: September 28, 2010
    Assignee: Samsung LED Co., Ltd.
    Inventors: Jong Rak Sohn, Chul Soo Yoon, Chang Hoon Kwak, Il Woo Park
  • Publication number: 20100227424
    Abstract: The present invention relates to a light emitting diode package and a manufacturing method thereof. The light emitting diode package includes a substrate, an LED chip mounted on an upper part of a substrate, a molding material coated at the upper part of the substrate including an external surface of the LED chip, and an encapsulant coated at a lower part of the substrate and can improve luminous efficiency, minimize a package failure, and reduce a manufacture cost by facilitating the manufacturing process.
    Type: Application
    Filed: May 21, 2010
    Publication date: September 9, 2010
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Seong Ah JOO, Chang Hoon KWAK, Na Na PARK, Il Woo PARK
  • Publication number: 20100127290
    Abstract: The present invention relates to a light emitting diode package and a manufacturing method thereof. The light emitting diode package includes a substrate, an LED chip mounted on an upper part of a substrate, a molding material coated at the upper part of the substrate including an external surface of the LED chip, and an encapsulant coated at a lower part of the substrate and can improve luminous efficiency, minimize a package failure, and reduce a manufacture cost by facilitating the manufacturing process.
    Type: Application
    Filed: January 27, 2009
    Publication date: May 27, 2010
    Inventors: Seong Ah Joo, Chang Hoon Kwak, Na Na Park, II Woo Park
  • Publication number: 20080180948
    Abstract: A white light emitting device including: a blue LE chip having a dominant wavelength of 430 to 455 nm; a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue LED chip to emit green light, wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 chromaticity diagram, the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.
    Type: Application
    Filed: January 2, 2008
    Publication date: July 31, 2008
    Inventors: Chul Soo Yoon, Il Woo Park, Jong Rak Sohn, Chang Hoon Kwak
  • Publication number: 20080088226
    Abstract: Provided is a white light emitting diode (LED) including a blue LED chip; and yellow, green, and red light emitting phosphors that are coated on the blue LED chip at a predetermined mixing ratio and converts light, emitted from the blue LED chip, into white light.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 17, 2008
    Inventors: Jong Rak Sohn, Chul Soo Yoon, Chang Hoon Kwak, Woo Park