Patents by Inventor Ji Uk Jang
Ji Uk Jang 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: 11973066Abstract: A light-emitting element includes a first end portion and a second end portion disposed in a length direction of the light-emitting element, a first electrode corresponding to the first end portion, a first semiconductor layer on the first electrode, an active layer on the first semiconductor layer, a second semiconductor layer on the active layer, and a second electrode on the second semiconductor layer and corresponding to the second end portion. The second electrode includes a first layer on the first semiconductor layer, and a second layer on the first layer. The first semiconductor layer includes a p-type semiconductor layer doped with a p-type dopant. The second semiconductor layer includes an n-type semiconductor layer doped with an n-type dopant. The first electrode is in ohmic contact with the first semiconductor layer. The second electrode is in ohmic contact with the second semiconductor layer.Type: GrantFiled: April 29, 2021Date of Patent: April 30, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hyung Rae Cha, Dong Uk Kim, Sung Ae Jang, Ji Hyun Ham
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Patent number: 11936219Abstract: The present invention relates to a battery protection circuit for accurately detecting and blocking overcurrent by overcharge and overdischarge by using a power management IC (PMIC) side sensing resistor provided in an external system and connected to a battery without a separate shunt resistor mounted in the battery, and an overcurrent blocking method using the same.Type: GrantFiled: January 16, 2020Date of Patent: March 19, 2024Assignee: LG ENERGY SOLUTION, LTD.Inventors: Won Jeon Jeong, Ji Uk Jang
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Patent number: 11923145Abstract: A multilayer capacitor includes a body including a multilayer structure in which a plurality of dielectric layers are stacked in a first direction and a plurality of internal electrodes stacked with the dielectric layer interposed therebetween and external electrodes formed outside the body and connected to the internal electrodes. The body includes an active portion and a side margin portion covering the active portion and opposing each other in a second direction, and 1<A2/M1?1.5 and A2<A1 in which A1 is an average grain size of the dielectric layers in a central region of the active portion, A2 is an average grain size of the dielectric layers at an active boundary part of the active portion adjacent to the side margin portion, and M1 is an average grain size of the dielectric layers in a central region of the side margin portion.Type: GrantFiled: September 2, 2021Date of Patent: March 5, 2024Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Je Hee Lee, Seung In Baik, Ji Su Hong, Eun Ha Jang, Hyoung Uk Kim, Jae Sung Park
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Patent number: 11884808Abstract: The present invention relates to a thermoplastic resin composition, which includes a first copolymer formed by polymerizing a monomer mixture of a (meth)acrylate-based monomer, a vinyl cyan-based monomer and a maleimide-based monomer, and having a refractive index of 1.5170 or less and a glass transition temperature of 115.0° C. or more; and a second copolymer formed by graft-copolymerizing an aromatic vinyl-based monomer and a vinyl cyan-based monomer onto an acrylic rubber polymer, and the thermoplastic resin composition according to the present invention has improved heat resistance, colorability and scratch resistance.Type: GrantFiled: November 28, 2019Date of Patent: January 30, 2024Assignee: LG CHEM, LTD.Inventors: Jung Tae Park, Dae Woo Lee, Jae Bum Seo, Gyu Sun Kim, Ji Uk Jang
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Publication number: 20240002568Abstract: The present disclosure relates to a method of preparing a polymer including preparing a first polymer mixture by polymerizing while continuously adding a monomer mixture comprising a (meth)acrylate-based monomer, a vinyl aromatic monomer, and a first vinyl cyanide-based monomer to a first reactor; and preparing a second polymer mixture by polymerizing while continuously adding a second vinyl cyanide-based monomer and the first polymer mixture to a second reactor, wherein a starting time of the continuous addition of the second vinyl cyanide-based monomer and the first polymer mixture is a time when a polymerization conversion rate is 40.0 to 55.0%, and a weight ratio of the first vinyl cyanide-based monomer and the second vinyl cyanide-based monomer is 10:90 to 35:65.Type: ApplicationFiled: August 17, 2022Publication date: January 4, 2024Applicant: LG CHEM, LTD.Inventors: Jae Bum SEO, Dae Woo LEE, Jung Tae PARK, Jung Rae LEE, Ji Uk JANG, Kyeong Soo SHIN
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Publication number: 20230250210Abstract: The present disclosure relates to a method of preparing a graft polymer, which includes: performing primary continuous polymerization by adding a diene-based rubber polymer and an aromatic vinyl-based monomer to a first reactor; and performing secondary continuous polymerization by adding the polymerization product discharged from the first reactor, a maleimide-based monomer, and a vinyl cyanide-based monomer to a second reactor.Type: ApplicationFiled: November 19, 2021Publication date: August 10, 2023Applicant: LG CHEM, LTD.Inventors: Ji Uk JANG, Dae Woo LEE, Jae Bum SEO, Jung Tae PARK, Jung Rae LEE
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Patent number: 11708443Abstract: Provided is a method of preparing a graft copolymer, which includes: preparing a liquid maleimide-based monomer; preparing a reaction solution including a diene-based rubber polymer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer; and adding the liquid maleimide-based monomer and the reaction solution to a reactor and carrying out polymerization. According to the preparation method of the present invention, the amount of the maleimide-based monomer involved in the polymerization can be increased, and the color characteristics, glass transition temperature, and softening temperature of the graft copolymer are improved.Type: GrantFiled: November 8, 2019Date of Patent: July 25, 2023Assignee: LG CHEM, LTD.Inventors: Ji Uk Jang, Dae Woo Lee, Jae Bum Seo, Jung Tae Park, Gyu Sun Kim
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Publication number: 20230208162Abstract: The present invention relates to a battery protection circuit and a method for protecting the battery protection circuit in which instead of connecting the charge/discharge FET on the current path between the battery and the external system, when an abnormal condition occurs in the battery, the 0V voltage of the battery cell is transmitted to the external system through the disconnection of the voltage sensing line to cut off the abnormal current of the battery in the external system.Type: ApplicationFiled: August 20, 2021Publication date: June 29, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventor: Ji Uk JANG
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Publication number: 20230025048Abstract: A battery cell, a battery pack and an electronic device with improved durability by reducing bend-induced damage, whereby a battery cell includes at least two battery units, each including a plurality of electrode leads, an electrode assembly, an electrolyte solution and an inner pouch in which the electrode assembly and the electrolyte solution are received, wherein at least one of the plurality of electrode leads of one battery unit is inserted into the other battery unit and electrically connected to the electrode assembly, and an outer pouch including at least two receiving portions in which the at least two battery units are received respectively, and a bending portion in which a part of the plurality of electrode leads is disposed and a part between the at least two receiving portions is bent.Type: ApplicationFiled: May 27, 2021Publication date: January 26, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventor: Ji-Uk JANG
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Publication number: 20220213247Abstract: Disclosed is a method for producing a diene-based graft copolymer resin, and a diene-based graft copolymer resin produced therefrom, the method including: adding, into a reactor, a polymerization solution containing a diene-based rubber polymer, an aromatic vinyl-based monomer, a vinyl cyan-based monomer, a polymerization initiator, and a reaction solvent, and polymerizing the polymerization solution to prepare a polymer; recovering a solution containing unreacted monomers and a reaction solvent from the polymerization solution, dispersing a releasing agent in the recovered solution, and then adding the solution into the front end of a volatilization tank; and removing the unreacted monomers and the reaction solvent from the volatilization tank.Type: ApplicationFiled: October 7, 2020Publication date: July 7, 2022Applicant: LG CHEM, LTD.Inventors: Ji Uk JANG, Dae Woo LEE, Jae Bum SEO, Jung Tae PARK, Gyu Sun KIM
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Patent number: 11332568Abstract: Provided are a method for preparing a graft copolymer and a graft copolymer prepared thereby, the method comprising: preparing a reaction solution comprising a copolymer comprising a unit derived from a diene-based monomer and a unit derived from an alkene-based monomer, an aromatic vinyl-based monomer, a vinyl cyan-based monomer, and a reaction solvent; and adding the reaction solution to perform primary bulk polymerization at 100 to 110° C., wherein the copolymer comprises the unit derived from a diene-based monomer in an amount of 5 to 10 wt %, and the graft copolymer has an average rubber particle size of 2 to 5?m.Type: GrantFiled: October 26, 2018Date of Patent: May 17, 2022Assignee: LG CHEM, LTD.Inventors: Jae Bum Seo, Dae Woo Lee, Jung Tae Park, Gyu Sun Kim, Ji Uk Jang
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Publication number: 20220135725Abstract: The present invention relates to a method for producing a diene-based graft copolymer resin, and a diene-based graft copolymer resin produced therefrom, the method including: mixing an aromatic vinyl-based monomer, a diene-based rubber polymer, and a polymerization initiator to prepare a first reactant; mixing a vinyl cyan-based monomer and an antioxidant to prepare a second reactant; adding and polymerizing the first reactant and the second reactant into a polymerization reactor to prepare a polymer; and removing unreacted monomers in a devolatilization tank.Type: ApplicationFiled: October 6, 2020Publication date: May 5, 2022Inventors: Jae Bum SEO, Dae Woo LEE, Jung Tae PARK, Gyu Sun KIM, Ji Uk JANG
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Patent number: 11180590Abstract: The present invention relates to a copolymer including 20 to 65 wt % of units derived from an alkyl styrene-based monomer; 10 to 40 wt % of units derived from a (meth)acrylate-based monomer; and 20 to 40 wt % of units derived from vinyl cyan-based monomer, based on the total weight of the copolymer, wherein the residual monomer content is 780 ppm or less, and a method for preparing the same.Type: GrantFiled: July 26, 2018Date of Patent: November 23, 2021Assignee: LG CHEM, LTD.Inventors: Jae Bum Seo, Dae Woo Lee, Jung Tae Park, Gyu Sun Kim, Ji Uk Jang
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Publication number: 20210218259Abstract: The present invention relates to a battery protection circuit for accurately detecting and blocking overcurrent by overcharge and overdischarge by using a power management IC (PMIC) side sensing resistor provided in an external system and connected to a battery without a separate shunt resistor mounted in the battery, and an overcurrent blocking method using the same.Type: ApplicationFiled: January 16, 2020Publication date: July 15, 2021Applicant: LG CHEM, LTD.Inventors: Won Jeon JEONG, Ji Uk JANG
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Publication number: 20210206958Abstract: The present invention relates to a thermoplastic resin composition, which includes a first copolymer formed by polymerizing a monomer mixture of a (meth)acrylate-based monomer, a vinyl cyan-based monomer and a maleimide-based monomer, and having a refractive index of 1.5170 or less and a glass transition temperature of 115.0° C. or more; and a second copolymer formed by graft-copolymerizing an aromatic vinyl-based monomer and a vinyl cyan-based monomer onto an acrylic rubber polymer, and the thermoplastic resin composition according to the present invention has improved heat resistance, colorability and scratch resistance.Type: ApplicationFiled: November 28, 2019Publication date: July 8, 2021Inventors: Jung Tae PARK, Dae Woo LEE, Jae Bum SEO, Gyu Sun KIM, Ji Uk JANG
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Publication number: 20210163652Abstract: Provided is a method of preparing a graft copolymer, which includes: preparing a liquid maleimide-based monomer; preparing a reaction solution including a diene-based rubber polymer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer; and adding the liquid maleimide-based monomer and the reaction solution to a reactor and carrying out polymerization. According to the preparation method of the present invention, the amount of the maleimide-based monomer involved in the polymerization can be increased, and the color characteristics, glass transition temperature, and softening temperature of the graft copolymer are improved.Type: ApplicationFiled: November 8, 2019Publication date: June 3, 2021Inventors: Ji Uk JANG, Dae Woo LEE, Jae Bum SEO, Jung Tae PARK, Gyu Sun KIM
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Publication number: 20200199280Abstract: Provided are a method for preparing a graft copolymer and a graft copolymer prepared thereby, the method comprising: preparing a reaction solution comprising a copolymer comprising a unit derived from a diene-based monomer and a unit derived from an alkene-based monomer, an aromatic vinyl-based monomer, a vinyl cyan-based monomer, and a reaction solvent; and adding the reaction solution to perform primary bulk polymerization at 100 to 110° C., wherein the copolymer comprises the unit derived from a diene-based monomer in an amount of 5 to 10 wt %, and the graft copolymer has an average rubber particle size of 2 to 5?m.Type: ApplicationFiled: October 26, 2018Publication date: June 25, 2020Inventors: Jae Bum SEO, Dae Woo LEE, Jung Tae PARK, Gyu Sun KIM, Ji Uk JANG
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Publication number: 20200040115Abstract: The present invention relates to a copolymer including 20 to 65 wt % of units derived from an alkyl styrene-based monomer; 10 to 40 wt % of units derived from a (meth)acrylate-based monomer; and 20 to 40 wt % of units derived from vinyl cyan-based monomer, based on the total weight of the copolymer, wherein the residual monomer content is 780 ppm or less, and a method for preparing the same.Type: ApplicationFiled: July 26, 2018Publication date: February 6, 2020Inventors: Jae Bum SEO, Dae Woo LEE, Jung Tae PARK, Gyu Sun KIM, Ji Uk JANG
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Patent number: 10536009Abstract: A dual cell protection IC and a battery module have a FET as an external type that are configured to protect a plurality of battery cells with one IC when an abnormal state caused during charge/discharge occurs.Type: GrantFiled: November 13, 2017Date of Patent: January 14, 2020Assignee: LG Chem, Ltd.Inventors: Hak Yong Shin, Ji Uk Jang
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Publication number: 20180152030Abstract: A dual cell protection IC and a battery module have a FET as an external type that are configured to protect a plurality of battery cells with one IC when an abnormal state caused during charge/discharge occurs.Type: ApplicationFiled: November 13, 2017Publication date: May 31, 2018Inventors: Hak Yong Shin, Ji Uk Jang