Patents by Inventor Ki Duck Park

Ki Duck Park 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: 10634952
    Abstract: A liquid crystal display device, includes a liquid crystal panel; and a backlight unit under the liquid crystal panel and having a light source. The light source includes a first luminous material having a first peak wavelength, a second luminous material having a second peak wavelength greater than the first peak wavelength, a third luminous material having a third peak wavelength greater than the second peak wavelength, and a light absorption material having an absorption maximum at a wavelength between the second peak wavelength and the third peak wavelength.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: April 28, 2020
    Assignee: LG Display Co., Ltd.
    Inventor: Ki-Duck Park
  • Patent number: 10466408
    Abstract: A liquid crystal display device containing a liquid crystal panel that includes a first substrate, a second substrate, and first and second polarizers at respective outer surfaces of the first and second substrates; and a backlight unit under the liquid crystal panel that includes a light source, wherein the light source includes a first luminous body having a first peak wavelength, a second luminous body having a second peak wavelength greater than the first peak wavelength, and a third luminous body having a third peak wavelength greater than the second peak wavelength, and wherein the first polarizer contains a light absorption layer having an absorption peak between the second peak wavelength and the third peak wavelength.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: November 5, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Ga-Ram Hong, Jin-Ho Kim, Sang-Min Lee, Ki-Duck Park, Joo-Bin Lee
  • Publication number: 20180239079
    Abstract: A liquid crystal display device, includes a liquid crystal panel; and a backlight unit under the liquid crystal panel and having a light source. The light source includes a first luminous material having a first peak wavelength, a second luminous material having a second peak wavelength greater than the first peak wavelength, a third luminous material having a third peak wavelength greater than the second peak wavelength, and a light absorption material having an absorption maximum at a wavelength between the second peak wavelength and the third peak wavelength.
    Type: Application
    Filed: February 17, 2017
    Publication date: August 23, 2018
    Applicant: LG Display Co., Ltd.
    Inventor: Ki-Duck PARK
  • Publication number: 20170059932
    Abstract: A liquid crystal display device containing a liquid crystal panel that includes a first substrate, a second substrate, and first and second polarizers at respective outer surfaces of the first and second substrates; and a backlight unit under the liquid crystal panel that includes a light source, wherein the light source includes a first luminous body having a first peak wavelength, a second luminous body having a second peak wavelength greater than the first peak wavelength, and a third luminous body having a third peak wavelength greater than the second peak wavelength, and wherein the first polarizer contains a light absorption layer having an absorption peak between the second peak wavelength and the third peak wavelength.
    Type: Application
    Filed: August 29, 2016
    Publication date: March 2, 2017
    Applicant: LG Display Co., Ltd.
    Inventors: Ga-Ram HONG, Jin-Ho KIM, Sang-Min LEE, Ki-Duck PARK, Joo-Bin LEE
  • Patent number: 9423649
    Abstract: A backlight unit includes first and second light sources; first and second light guide bars positioned between the first and second light sources and each having a branch shape; and a mold frame accommodating the first and second light sources and the first and second light guide bars.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: August 23, 2016
    Assignee: LG Display Co., Ltd.
    Inventor: Ki-Duck Park
  • Patent number: 9335458
    Abstract: A backlight unit and an LCD device using the same are provided. The backlight unit includes a light guide panel, a light source unit disposed at a rear-direction lower end of the light guide panel, an optical film disposed in a front direction of the light guide panel to face the light source unit and configured to reflect light emitted from the light source unit, and an optical sheet part disposed in the front direction of the light guide panel, and configured to change a travel direction of the light, which is output from the light guide panel, to a direction vertical to the light guide panel.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: May 10, 2016
    Assignee: LG Display Co., Ltd.
    Inventors: Ki Duck Park, Hoan Su Shim, Hyung Seok Bang
  • Patent number: 9297057
    Abstract: A cold rolled steel sheet, and a method of manufacturing the same, designed to have aging resistance and excellent formability suitable for use in automobile bodies, electronic appliances, and the like. The cold rolled steel sheet comprises in weight %: 0.003% or less of C, 0.003˜0.03% of S, 0.01˜0.1% of Al, 0.02% or less of N, 0.2% or less of P, at least one of 0.03˜0.2% of Mn and 0.005˜0.2% of Cu, and a balance of Fe and other unavoidable impurities. When the steel sheet comprises one of Mn and Cu, the composition of Mn, Cu, and S satisfies at least one relationship: 0.58*Mn/S?10 and 1?0.5*Cu/S?10, and when the steel sheet comprises both Mn and Cu, the composition of Mn, Cu, and S satisfies the relationship: Mn+Cu?0.3 and 2?0.5*(Mn+Cu)/S?20. Participates of MnS, CuS, and (Mn, Cu)S in the steel sheet have an average size of 0.2 ?m or less.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: March 29, 2016
    Assignee: POSCO
    Inventors: Jeong-Bong Yoon, Won-Ho Son, Ki-Bong Kang, Noi-Ha Cho, Ki-Duck Park
  • Publication number: 20150062482
    Abstract: A backlight unit and an LCD device using the same are provided. The backlight unit includes a light guide panel, a light source unit disposed at a rear-direction lower end of the light guide panel, an optical film disposed in a front direction of the light guide panel to face the light source unit and configured to reflect light emitted from the light source unit, and an optical sheet part disposed in the front direction of the light guide panel, and configured to change a travel direction of the light, which is output from the light guide panel, to a direction vertical to the light guide panel.
    Type: Application
    Filed: September 3, 2014
    Publication date: March 5, 2015
    Inventors: Ki Duck Park, Hoan Su Shim, Hyung Seok Bang
  • Publication number: 20140307198
    Abstract: A backlight unit includes first and second light sources; first and second light guide bars positioned between the first and second light sources and each having a branch shape; and a mold frame accommodating the first and second light sources and the first and second light guide bars.
    Type: Application
    Filed: April 8, 2014
    Publication date: October 16, 2014
    Applicant: LG Display Co., Ltd.
    Inventor: Ki-Duck PARK
  • Patent number: 8785038
    Abstract: A negative electrode active material and a secondary battery are provided. The negative electrode active material can be useful in maintaining excellent cell efficiency and lifespan while showing high-capacity properties, and the secondary battery may be manufactured using the negative electrode active material.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: July 22, 2014
    Assignee: Iljin Electric Co., Ltd.
    Inventors: Jae Woong Kim, Seung Chul Lee, Ki Duck Park, Chul Gyu Bae, Jong Goo Kang, Yoon Seong Cho
  • Publication number: 20130130101
    Abstract: A negative electrode active material and a secondary battery are provided. The negative electrode active material can be useful in maintaining excellent cell efficiency and lifespan while showing high-capacity properties, and the secondary battery may be manufactured using the negative electrode active material.
    Type: Application
    Filed: November 19, 2010
    Publication date: May 23, 2013
    Inventors: Jae Woong Kim, Seung Chul Lee, Ki Duck Park, Chul Gyu Bae, Jong Goo Kang, Yoon Seong Cho
  • Patent number: 8149352
    Abstract: A backlight unit which prevents an initial driving malfunction is disclosed. The backlight unit includes: a bottom cover opened upwardly; a reflective sheet disposed in the inner surface of the bottom cover; a plurality of lamps arranged in a fixed interval on the reflective sheet; a driver disposed on the rear surface of the bottom cover; an auxiliary light source loaded on the driver; a first hole formed in a region of the bottom cover opposite to the auxiliary light source; and a hole region, on the reflective sheet, including one of plural micro-penetration holes and plural slit holes and opposite the first hole on the reflective sheet.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: April 3, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Ki Duck Park, Hyun Woo Kim
  • Patent number: 7952280
    Abstract: Disclosed is an EEFL and LCD device using the same, the EEFL comprising: a glass tube coated with a fluorescent material therein and filled with discharge gas, main electrodes at both ends of the glass tube and sub-electrodes formed at an outer surface of the glass tube and being respectively spaced from the main electrodes, or comprising: a glass tube coated with a fluorescent material therein and filled with discharge gas, main electrodes at both ends of the glass tube, sub-electrodes at an outer surface of the glass tube and being respectively spaced from the main electrodes and electrode connection lines connecting each of the main electrodes and the sub-electrodes to each other.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: May 31, 2011
    Assignee: LG Display Co., Ltd.
    Inventor: Ki-Duck Park
  • Publication number: 20100103340
    Abstract: A backlight unit which prevents an initial driving malfunction is disclosed. The backlight unit includes: a bottom cover opened upwardly; a reflective sheet disposed in the inner surface of the bottom cover; a plurality of lamps arranged in a fixed interval on the reflective sheet; a driver disposed on the rear surface of the bottom cover; an auxiliary light source loaded on the driver; a first hole formed in a region of the bottom cover opposite to the auxiliary light source; and a hole region, on the reflective sheet, including one of plural micro-penetration holes and plural slit holes and opposite the first hole on the reflective sheet.
    Type: Application
    Filed: October 27, 2009
    Publication date: April 29, 2010
    Inventors: Ki Duck Park, Hyun Woo Kim
  • Publication number: 20090134770
    Abstract: Disclosed is an EEFL and LCD device using the same, the EEFL comprising: a glass tube coated with a fluorescent material therein and filled with discharge gas, main electrodes at both ends of the glass tube and sub-electrodes formed at an outer surface of the glass tube and being respectively spaced from the main electrodes, or comprising: a glass tube coated with a fluorescent material therein and filled with discharge gas, main electrodes at both ends of the glass tube, sub-electrodes at an outer surface of the glass tube and being respectively spaced from the main electrodes and electrode connection lines connecting each of the main electrodes and the sub-electrodes to each other.
    Type: Application
    Filed: October 20, 2008
    Publication date: May 28, 2009
    Inventor: Ki-Duck Park
  • Patent number: 7518572
    Abstract: A temperature of the plasma display panel is detected by a temperature sensor. An apparatus includes a display panel, a plate disposed adjacent to a rear surface of the panel, and a board disposed substantially parallel to the plate. A temperature sensor is formed on the board, and the temperature sensor is disposed between the plate and the board.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: April 14, 2009
    Assignee: LG Electronics Inc.
    Inventors: Junc Hee Kong, Ki Duck Park
  • Publication number: 20090020196
    Abstract: A cold rolled steel sheet, and a method of manufacturing the same, designed to have aging resistance and excellent formability suitable for use in automobile bodies, electronic appliances, and the like. The cold rolled steel sheet comprises in weight %: 0.003% or less of C, 0.003˜0.03% of S, 0.01˜0.1% of Al, 0.02% or less of N, 0.2% or less of P, at least one of 0.03˜0.2% of Mn and 0.005˜0.2% of Cu, and a balance of Fe and other unavoidable impurities. When the steel sheet comprises one of Mn and Cu, the composition of Mn, Cu, and S satisfies at least one relationship: 0.58*Mn/S?10 and 1?0.5*Cu/S?10, and when the steel sheet comprises both Mn and Cu, the composition of Mn, Cu, and S satisfies the relationship: Mn+Cu?0.3 and 2?0.5*(Mn+Cu)/S?20. Participates of MnS, CuS, and (Mn, Cu)S in the steel sheet have an average size of 0.2 ?m or less.
    Type: Application
    Filed: November 10, 2004
    Publication date: January 22, 2009
    Applicant: POSCO
    Inventors: Jeong-Bong Yoon, Won-Ho Son, Ki-Bong Kang, Noi-Ha Cho, Ki-Duck Park
  • Publication number: 20080292894
    Abstract: A chrome free composition for metal surface treatment and a surface-treated metal sheet can provide excellent characteristics of high conductivity, corrosion resistance, alkali resistance, and high temperature and humidity resistance. The composition includes a vinyl based binder resin, an acryl based binder resin, and a solvent. In the vinyl based binder resin, a corrosion-resistant inorganic material is combined, and an amount of the vinyl based binder resin is in a range of 10 weight % to 70 weight % with respect to a total solid content. In the acryl based binder resin, a corrosion-resistant inorganic material is combined, and an amount of the acryl based binder resin is in a range of 15 weight % to 75 weight % with respect to the total solid content. An amount of the corrosion resistance inorganic material is in a range of 3 weight % to 25 weight % with respect to a total solid content.
    Type: Application
    Filed: December 22, 2005
    Publication date: November 27, 2008
    Applicant: POSCO
    Inventors: Rho-Bum Park, Ki-Duck Park, Hong-Jong Yoo, Kook-Jin Han, Yeong-Sool Jin, Sang-Keol Noh
  • Publication number: 20080136746
    Abstract: A temperature of the plasma display panel is detected by a temperature sensor. An apparatus includes a display panel, a plate disposed adjacent to a rear surface of the panel, and a board disposed substantially parallel to the plate. A temperature sensor is formed on the board, and the temperature sensor is disposed between the plate and the board.
    Type: Application
    Filed: February 12, 2008
    Publication date: June 12, 2008
    Inventors: Jun Hee KONG, Ki Duck Park
  • Publication number: 20040233133
    Abstract: An apparatus of driving a plasma display panel capable of accurately detecting a temperature of the plasma display panel for a stable driving of the plasma display panel is disclosed.
    Type: Application
    Filed: May 21, 2004
    Publication date: November 25, 2004
    Applicant: LG Electronics Inc.
    Inventors: Junc Hee Kong, Ki Duck Park