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).
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Patent number: 10634952Abstract: 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: GrantFiled: February 17, 2017Date of Patent: April 28, 2020Assignee: LG Display Co., Ltd.Inventor: Ki-Duck Park
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Patent number: 10466408Abstract: 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: GrantFiled: August 29, 2016Date of Patent: November 5, 2019Assignee: LG Display Co., Ltd.Inventors: Ga-Ram Hong, Jin-Ho Kim, Sang-Min Lee, Ki-Duck Park, Joo-Bin Lee
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Publication number: 20180239079Abstract: 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: ApplicationFiled: February 17, 2017Publication date: August 23, 2018Applicant: LG Display Co., Ltd.Inventor: Ki-Duck PARK
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Publication number: 20170059932Abstract: 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: ApplicationFiled: August 29, 2016Publication date: March 2, 2017Applicant: LG Display Co., Ltd.Inventors: Ga-Ram HONG, Jin-Ho KIM, Sang-Min LEE, Ki-Duck PARK, Joo-Bin LEE
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Patent number: 9423649Abstract: 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: GrantFiled: April 8, 2014Date of Patent: August 23, 2016Assignee: LG Display Co., Ltd.Inventor: Ki-Duck Park
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Patent number: 9335458Abstract: 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: GrantFiled: September 3, 2014Date of Patent: May 10, 2016Assignee: LG Display Co., Ltd.Inventors: Ki Duck Park, Hoan Su Shim, Hyung Seok Bang
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Patent number: 9297057Abstract: 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: GrantFiled: November 10, 2004Date of Patent: March 29, 2016Assignee: POSCOInventors: Jeong-Bong Yoon, Won-Ho Son, Ki-Bong Kang, Noi-Ha Cho, Ki-Duck Park
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Publication number: 20150062482Abstract: 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: ApplicationFiled: September 3, 2014Publication date: March 5, 2015Inventors: Ki Duck Park, Hoan Su Shim, Hyung Seok Bang
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Publication number: 20140307198Abstract: 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: ApplicationFiled: April 8, 2014Publication date: October 16, 2014Applicant: LG Display Co., Ltd.Inventor: Ki-Duck PARK
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Patent number: 8785038Abstract: 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: GrantFiled: November 19, 2010Date of Patent: July 22, 2014Assignee: Iljin Electric Co., Ltd.Inventors: Jae Woong Kim, Seung Chul Lee, Ki Duck Park, Chul Gyu Bae, Jong Goo Kang, Yoon Seong Cho
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Publication number: 20130130101Abstract: 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: ApplicationFiled: November 19, 2010Publication date: May 23, 2013Inventors: Jae Woong Kim, Seung Chul Lee, Ki Duck Park, Chul Gyu Bae, Jong Goo Kang, Yoon Seong Cho
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Patent number: 8149352Abstract: 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: GrantFiled: October 27, 2009Date of Patent: April 3, 2012Assignee: LG Display Co., Ltd.Inventors: Ki Duck Park, Hyun Woo Kim
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Patent number: 7952280Abstract: 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: GrantFiled: October 20, 2008Date of Patent: May 31, 2011Assignee: LG Display Co., Ltd.Inventor: Ki-Duck Park
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Publication number: 20100103340Abstract: 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: ApplicationFiled: October 27, 2009Publication date: April 29, 2010Inventors: Ki Duck Park, Hyun Woo Kim
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Publication number: 20090134770Abstract: 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: ApplicationFiled: October 20, 2008Publication date: May 28, 2009Inventor: Ki-Duck Park
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Patent number: 7518572Abstract: 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: GrantFiled: May 21, 2004Date of Patent: April 14, 2009Assignee: LG Electronics Inc.Inventors: Junc Hee Kong, Ki Duck Park
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Publication number: 20090020196Abstract: 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: ApplicationFiled: November 10, 2004Publication date: January 22, 2009Applicant: POSCOInventors: Jeong-Bong Yoon, Won-Ho Son, Ki-Bong Kang, Noi-Ha Cho, Ki-Duck Park
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Publication number: 20080292894Abstract: 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: ApplicationFiled: December 22, 2005Publication date: November 27, 2008Applicant: POSCOInventors: Rho-Bum Park, Ki-Duck Park, Hong-Jong Yoo, Kook-Jin Han, Yeong-Sool Jin, Sang-Keol Noh
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Publication number: 20080136746Abstract: 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: ApplicationFiled: February 12, 2008Publication date: June 12, 2008Inventors: Jun Hee KONG, Ki Duck Park
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Publication number: 20040233133Abstract: 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: ApplicationFiled: May 21, 2004Publication date: November 25, 2004Applicant: LG Electronics Inc.Inventors: Junc Hee Kong, Ki Duck Park