Patents by Inventor Joon-Keun Lee
Joon-Keun Lee 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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Publication number: 20240121996Abstract: A display device is provided. The display device includes a substrate including a display area and a pad area, which is disposed on one side of the display area, a plurality of conductive layers disposed on the substrate, in the display area and the pad area, a passivation layer disposed on the conductive layers, and a plurality of light-emitting elements disposed on the passivation layer, in the display area, and spaced apart from one another, wherein at least one of the conductive layers includes a first metal layer, a second metal layer, which is disposed on the first metal layer, and a third metal layer, which is disposed on the second metal layer, the first metal layer includes vanadium (V), the second metal layer includes aluminum (Al) or an Al alloy, and the third metal layer includes V or titanium (Ti).Type: ApplicationFiled: July 31, 2023Publication date: April 11, 2024Inventors: Hyun Eok SHIN, Sang Gab KIM, Joon Yong PARK, Do Keun SONG, Su Kyoung YANG, Dong Min LEE
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Patent number: 11049631Abstract: A power cable includes a conductor, an inner semi-conductive layer covering the conductor, an insulating layer covering the inner semi-conductive layer and impregnated with insulating oil, an outer semi-conductive layer covering the insulating layer, a metal sheath layer covering the outer semi-conductive layer, and a cable protection layer covering the metal sheath layer. A minimum thickness t1 of a certain cross section of the metal sheath layer is less than or equal to 90% of a maximum thickness t2 thereof.Type: GrantFiled: March 30, 2017Date of Patent: June 29, 2021Assignee: LS CABLE & SYSTEM LTD.Inventors: Ji Sung Kim, Weon Bae Kim, Kyoung Ro Ko, Joon Keun Lee, Kum Hwan Cha, Jae Cheol Gwag, Tae Hyun Kim
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Patent number: 10672539Abstract: A power cable includes a conductor; an inner semi-conductive layer covering the conductor; an insulating layer covering the inner semi-conductive layer, the insulating layer being impregnated with an insulating oil; an outer semi-conductive layer covering the insulating layer; a metal sheath layer covering the outer semi-conductive layer; and a cable protection layer covering the metal sheath layer. The insulating layer is formed by cross-winding insulating paper and impregnating the insulating paper with the insulating oil. The inner semi-conductive layer and the outer semi-conductive layer are formed by cross-winding semi-conductive paper and impregnating the semi-conductive paper with the insulating oil. A thickness of the outer semi-conductive layer is 7.5 to 15% of a total thickness of the inner semi-conductive layer, the insulating layer, and the outer semi-conductive layer.Type: GrantFiled: March 30, 2017Date of Patent: June 2, 2020Assignee: LS CABLE & SYSTEM LTD.Inventors: Ji Sung Kim, Weon Bae Kim, Kyoung Ro Ko, Su Kil Lee, Joon Keun Lee, Soon Il Sohn, Kum Hwan Cha, Jae Cheol Gwag, Tae Hyun Kim
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Publication number: 20200051713Abstract: Provided is a power cable, particularly, an ultra-high voltage underground or submarine cable for long-distance direct-current transmission. More specifically, the present invention relates to a power cable, in which an insulating layer has high dielectric strength, an electric field applied to the insulating layer is effectively reduced, and particularly, a void is suppressed from occurring in the insulating layer due to contraction of insulating oil, caused by a decrease of temperature in the insulating layer under a low-temperature condition or when the supply of an electric current is stopped, thereby effectively suppressing partial discharge, dielectric breakdown, etc. due to an electric field concentrated in the void.Type: ApplicationFiled: March 30, 2017Publication date: February 13, 2020Inventors: Ji Sung KIM, Weon Bae KIM, Kyoung Ro KO, Joon Keun LEE, Kum Hwan Cha, Jae Cheol Gwag, Tae Hyun KIM
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Publication number: 20200013526Abstract: Provided is a power cable, particularly, an ultra-high voltage underground or submarine cable for long-distance direct-current transmission. More specifically, the present invention relates to a power cable, in which an insulating layer has high dielectric strength, an electric field applied to the insulating layer is effectively reduced, and particularly, a large void is suppressed from occurring in the insulating layer when the power cable is left at low temperatures for a long time until electric current is supplied thereto after installed in a low-temperature environment, thereby effectively preventing partial discharge, dielectric breakdown, etc. from occurring due to an electric field concentrated in the large void.Type: ApplicationFiled: March 30, 2017Publication date: January 9, 2020Inventors: Ji Sung KIM, Weon Bae KIM, Kyoung Ro KO, Su Kil LEE, Joon Keun LEE, Soon Il SOHN, Kum Hwan CHA, Jae Cheol GWAG, Tae Hyun KIM
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Patent number: 8776463Abstract: A vibration isolator of a wind turbine system installed between a wind tower and a concrete foundation includes a plurality of bearing units arranged along the periphery of a flange of the wind tower, each bearing unit having elastic material layers and rigid material layers stacked alternately.Type: GrantFiled: April 14, 2011Date of Patent: July 15, 2014Assignee: LS Cable & Systems Ltd.Inventors: Bong-Suk Kim, Man-Eok Hur, Joon-Keun Lee
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Publication number: 20130031859Abstract: A vibration isolator of a wind turbine system installed between a wind tower and a concrete foundation includes a plurality of bearing units arranged along the periphery of a flange of the wind tower, each bearing unit having elastic material layers and rigid material layers stacked alternately.Type: ApplicationFiled: April 14, 2011Publication date: February 7, 2013Applicant: LS Cable &Systems Ltd.Inventors: Bong-Suk Kim, Man-Eok Hur, Joon-Keun Lee
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Patent number: 8122732Abstract: Disclosed is a refrigerator having a noise reduction structure. According to the refrigerator, a branch pipe for reducing the intensive noise occurring from an impeller part is provided to a discharge pipe connected so that the refrigerant is discharged in a direction of a condenser from the impeller part. Therefore, the traveling sound wave of the noise traveling along the discharge pipe and the reverse sound wave traveling toward the branch pipe provided to the outer periphery of the discharge pipe meet each other, so that the both sound waves are cancelled to reduce the noise.Type: GrantFiled: September 7, 2007Date of Patent: February 28, 2012Assignee: LG Electronics Inc.Inventors: Joon Keun Lee, Jeong Ho Kim, Won Ki Park
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Patent number: 7823419Abstract: A furnace for drawing an optical fiber includes a body having an upper and lower openings for supplying a preform and discharging a drawn optical fiber, a heating unit installed in the body for receiving and melting the preform, an atmosphere blocking tube installed to the lower opening for discharging the drawn optical fiber and blocking the optical fiber from the atmosphere, an upper introduction port formed at an upper portion of the body for introducing an inert gas toward the preform and partially discharged outside through a gap between the preform and the upper opening, a central and lower introduction ports formed at central and lower portions for introducing an inert gas into the body, a first flow guiding means for guiding the inert gas introduced through the central introduction port upward and then flowed down along a surface of the preform, and a second flow guiding means for guiding the inert gas introduced through the lower introduction port upward and then discharged outside through the atmospType: GrantFiled: February 3, 2009Date of Patent: November 2, 2010Assignee: LS Cable Ltd.Inventors: Sang-Joon Bae, Young-Il Kwon, Joon-Keun Lee, Chul-Min Kim, Myung-Ho Jang
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Publication number: 20100175410Abstract: Disclosed is a refrigerator having a noise reduction structure. According to the refrigerator, a branch pipe for reducing the intensive noise occurring from an impeller part is provided to a discharge pipe connected so that the refrigerant is discharged in a direction of a condenser from the impeller part. Therefore, the traveling sound wave of the noise traveling along the discharge pipe and the reverse sound wave traveling toward the branch pipe provided to the outer periphery of the discharge pipe meet each other, so that the both sound waves are cancelled to reduce the noise.Type: ApplicationFiled: September 7, 2007Publication date: July 15, 2010Inventors: Joon Keun Lee, Jeong Ho Kim, Won Ki Park
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Publication number: 20090145169Abstract: A furnace for drawing an optical fiber includes a body having an upper and lower openings for supplying a preform and discharging a drawn optical fiber, a heating unit installed in the body for receiving and melting the preform, an atmosphere blocking tube installed to the lower opening for discharging the drawn optical fiber and blocking the optical fiber from the atmosphere, an upper introduction port formed at an upper portion of the body for introducing an inert gas toward the preform and partially discharged outside through a gap between the preform and the upper opening, a central and lower introduction ports formed at central and lower portions for introducing an inert gas into the body, a first flow guiding means for guiding the inert gas introduced through the central introduction port upward and then flowed down along a surface of the preform, and a second flow guiding means for guiding the inert gas introduced through the lower introduction port upward and then discharged outside through the atmospType: ApplicationFiled: February 3, 2009Publication date: June 11, 2009Applicant: LG CableInventors: Sang-Joon Bae, Young-II Kwon, Joon-Keun Lee, Chul-Min Kim, Myung-Ho Jang
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Patent number: 7513191Abstract: A piston head of a hydraulic injection molding machine is screwed with a tie rod inside a hydraulic cylinder of the hydraulic injection molding machine. The piston head has a second screw formed in an inner circumference of a hollow of the piston head and engaged with a first screw formed in an outer circumference of the tie rod. An insert groove having a predetermined shape is formed in the inner circumference of the piston head in front of the second screw.Type: GrantFiled: January 8, 2007Date of Patent: April 7, 2009Assignee: LS Mtron Ltd.Inventors: Jeong-Ho Kim, Joon-Keun Lee, Young-Ju Kang
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Patent number: 7263263Abstract: A method for monitoring a spin imparted on an optical fiber in order to reduce Polarization Mode Dispersion (PMD) includes the steps of imparting a spin on a high-temperature optical fiber which is drawn from a preform, photographing a dispersion pattern peculiar to the spun optical fiber with a camera from scattered light naturally generated by the spin imparted on the optical fiber, and displaying the photographed dispersion pattern. The method enables monitoring of rate and period of the spin imparted on the optical fiber on the basis of the displayed dispersion pattern.Type: GrantFiled: July 29, 2003Date of Patent: August 28, 2007Assignee: LG Cable, Ltd.Inventors: Chul-Min Kim, Myung-Ho Jang, Sang-Joon Bae, Young-Il Kwon, Won-Sang Yoo, Joon-Keun Lee
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Publication number: 20070175325Abstract: A piston head of a hydraulic injection molding machine is screwed with a tie rod inside a hydraulic cylinder of the hydraulic injection molding machine. The piston head has a second screw formed in an inner circumference of a hollow of the piston head and engaged with a first screw formed in an outer circumference of the tie rod. An insert groove having a predetermined shape is formed in the inner circumference of the piston head in front of the second screw.Type: ApplicationFiled: January 8, 2007Publication date: August 2, 2007Inventors: Jeong-Ho Kim, Joon-Keun Lee, Young-Ju Kang
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Publication number: 20050163434Abstract: A method of applying spin to a coated optical fiber to be rotated on its longitudinal axis so that the optical fiber has an ultra-low PMD (Polarization Mode Dispersion) includes the steps of: guiding the coated optical fiber so as not to be deviated from a certain range off a drawing axis at a lower end of an optical fiber coating point; giving torque to the optical fiber by contacting the coated optical fiber with a driving roller which vibrates on the center of an axis substantially parallel to a drawing direction at a lower end of the guiding point; and adjusting an amplitude (A) of the driving roller and a distance (l) between the guiding point and the vibrating point so as to control an angle (?) between the vibrating optical and the drawing axis. This makes it possible to control a spin rate (spins/m) of the optical fiber generated by rotation.Type: ApplicationFiled: October 31, 2002Publication date: July 28, 2005Inventors: Young-Il Kwon, Sang-Joon Bae, Joon-Keun Lee, Myung-Ho Jang, Bong-Hoon Lee
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Publication number: 20040050112Abstract: A furnace for drawing an optical fiber includes a body having an upper and lower openings for supplying a preform and discharging a drawn optical fiber, a heating unit installed in the body for receiving and melting the preform, an atmosphere blocking tube installed to the lower opening for discharging the drawn optical fiber and blocking the optical fiber from the atmosphere, an upper introduction port formed at an upper portion of the body for introducing an inert gas toward the preform and partially discharged outside through a gap between the preform and the upper opening, a central and lower introduction ports formed at central and lower portions for introducing an inert gas into the body, a first flow guiding means for guiding the inert gas introduced through the central introduction port upward and then flowed down along a surface of the preform, and a second flow guiding means for guiding the inert gas introduced through the lower introduction port upward and then discharged outside through the atmospType: ApplicationFiled: April 22, 2003Publication date: March 18, 2004Applicant: LG Cable Ltd.Inventors: Sang-Joon Bae, Young-Il Kwon, Joon-Keun Lee, Chul-Min Kim, Myung-Ho Jang
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Publication number: 20040050115Abstract: In an optical fiber drawing apparatus capable of drawing one piece of an optical fiber, the present invention provides an optical fiber drawing apparatus which is adapted to decrease a break of an optical fiber to be adjusted a curvature radius thereof by at least one or more moving rollers continuously installed after a fixing roller and to decrease a polarization mode dispersion (PMD) by a birefringence which is not desired in an optical fiber.Type: ApplicationFiled: September 8, 2003Publication date: March 18, 2004Applicant: LG Cable Ltd.Inventors: Joon Keun Lee, Weon Bae Kim, Chul Min Kim
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Publication number: 20040042747Abstract: Disclosed is a method for monitoring a spin imparted on an optical fiber in order to reduce Polarization Mode Dispersion(PMD).Type: ApplicationFiled: July 29, 2003Publication date: March 4, 2004Inventors: Chul-Min Kim, Myung-Ho Jang, Sang-Joon Bae, Young-Il Kwon, Won-Sang Yoo, Joon-Keun Lee