Patents by Inventor Cheon-Il Park
Cheon-Il 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: 11935479Abstract: According to some aspects of the disclosure, an organic light-emitting display device including a display panel including a driving thin film transistor (TFT), comprises a sensing unit configured to perform a sensing operation for external compensation of the display panel, and an analog-digital converter (ADC) configured to perform a conversion operation of converting an analog value held in the sensing unit into a digital value, wherein the sensing unit comprises a basic sensing unit configured to perform a sensing operation on the driving TFT, and a dummy sensing unit configured to perform a sensing operation on changes in a gain and an offset of the ADC, and the basic sensing unit and the dummy sensing unit are in a cascade connection to each other.Type: GrantFiled: July 21, 2023Date of Patent: March 19, 2024Assignee: DB GlobalChip Co., Ltd.Inventors: Cheon Wi Park, Jung Il Seo, Jae Hong Ko
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Patent number: 9887405Abstract: Disclosed is a method of preparing a crosslinked polyolefin separator including preparing a silane grafted polyolefin solution using a polyolefin having a weight average molecular weight higher than or equal to 200,000, a diluent, an alkoxy group containing vinylsilane, and an initiator, forming the silane grafted polyolefin solution in a sheet shape and stretching, extracting the diluent from the stretched sheet to produce a porous membrane, and crosslinking the porous membrane in the presence of water, and a crosslinked polyolefin separator.Type: GrantFiled: October 30, 2015Date of Patent: February 6, 2018Assignee: LG CHEM, LTD.Inventors: Cheon-Il Park, Won-Sik Bae, Bi-Oh Ryu, Kyoung-Min Kim, Heon-Sik Song
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Patent number: 9527946Abstract: The present description relates to an olefin block copolymer having excellences in elasticity and heat resistance and its preparation method. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. The olefin block copolymer has a density of 0.85 to 0.92 g/cm3, and density X (g/cm3) and TMA (Thermal Mechanical Analysis) value Y (° C.) satisfy a defined relationship.Type: GrantFiled: July 9, 2015Date of Patent: December 27, 2016Assignee: LG Chem, Ltd.Inventors: Kyung-Seop Noh, Nan-Young Lee, Won-Hee Kim, Sang-Eun An, Sang-Jin Jeon, Cheon-Il Park, Choong-Hoon Lee
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Publication number: 20160168304Abstract: The present description relates to an olefin block copolymer having excellences in elasticity and heat resistance and its preparation method. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. The olefin block copolymer has a density of 0.85 to 0.92 g/cm3, and density X (g/cm3) and TMA (Thermal Mechanical Analysis) value Y (° C.) satisfy a defined relationship.Type: ApplicationFiled: July 9, 2015Publication date: June 16, 2016Inventors: Kyung-Seop NOH, Nan-Young LEE, Won-Hee KIM, Sang-Eun AN, Sang-Jin JEON, Cheon-Il PARK, Choong-Hoon LEE
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Publication number: 20160126518Abstract: Disclosed is a method of preparing a crosslinked polyolefin separator including preparing a silane grafted polyolefin solution using a polyolefin having a weight average molecular weight higher than or equal to 200,000, a diluent, an alkoxy group containing vinylsilane, and an initiator, forming the silane grafted polyolefin solution in a sheet shape and stretching, extracting the diluent from the stretched sheet to produce a porous membrane, and crosslinking the porous membrane in the presence of water, and a crosslinked polyolefin separator.Type: ApplicationFiled: October 30, 2015Publication date: May 5, 2016Inventors: Cheon-Il PARK, Won-Sik Bae, Bi-Oh Ryu, Kyoung-Min Kim, Heon-Sik Song
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Patent number: 9315605Abstract: The present invention relates to a method of producing an elastomer. Specifically, the method of producing an elastomer according to the present invention comprises a step of polymerizing ethylene, propylene, and optionally, a diene monomer in the presence of a catalyst composition containing a transition metal compound. The method of producing an elastomer according to the present invention makes it possible to prepare a high molecular weight, ethylene-propylene or ethylene-propylene-diene, elastic copolymer at a high temperature.Type: GrantFiled: December 29, 2011Date of Patent: April 19, 2016Assignee: LG CHEM, LTD.Inventors: Eun-Jung Lee, Sung-Soo Park, Beom-Doo Seo, Cheon-Il Park, Choong-Hoon Lee, Jong-Joo Ha, Jung-A Lee
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Patent number: 9079992Abstract: The present description relates to an olefin block copolymer having excellences in elasticity and heat resistance and its preparation method. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. The olefin block copolymer has a density of 0.85 to 0.92 g/cm3, and density X (g/cm3) and TMA (Thermal Mechanical Analysis) value Y (° C.) satisfy a defined relationship.Type: GrantFiled: January 19, 2012Date of Patent: July 14, 2015Assignee: LG CHEM, LTD.Inventors: Kyung-Seop Noh, Nan-Young Lee, Won-Hee Kim, Sang-Eun An, Sang-Jin Jeon, Cheon-Il Park, Choong-Hoon Lee
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Publication number: 20140371414Abstract: The present invention relates to a method of producing an elastomer. Specifically, the method of producing an elastomer according to the present invention comprises a step of polymerizing ethylene, propylene, and optionally, a diene monomer in the presence of a catalyst composition containing a transition metal compound. The method of producing an elastomer according to the present invention makes it possible to prepare a high molecular weight, ethylene-propylene or ethylene-propylene-diene, elastic copolymer at a high temperature.Type: ApplicationFiled: August 28, 2014Publication date: December 18, 2014Inventors: Eun-Jung LEE, Sung-Soo PARK, Beom-Doo SEO, Cheon-Il PARK, Choong-Hoon LEE, Jong-Joo HA, Jung-A LEE
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Patent number: 8765023Abstract: The present invention relates to a composition for preparing a separator for an electrochemical device, a method preparing a separator for an electrochemical device, and an electrochemical device having a separator prepared therefrom, more particularly, a composition for preparing a separator for an electrochemical device, comprising a polyolefin, a first diluent, and a second diluent, wherein an interaction energy between the first diluent and the second diluent is in the range of 2 to 3.5 cal/cm3, a method preparing a separator for an electrochemical device using the composition, and an electrochemical device having a separator prepared therefrom. In accordance with the present invention, the pore size of a polyolefin separator can be suitably controlled into a size desired by a user, and the high-temperature stability and mechanical property of the separator can be remarkably improved, thereby enhancing the life time and stability of an electrochemical device having the same.Type: GrantFiled: June 28, 2013Date of Patent: July 1, 2014Assignee: LG Chem, Ltd.Inventors: Bong-Tae Kim, Heon-Sik Song, Cheon-Il Park
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Patent number: 8759461Abstract: The present invention relates to a novel post metallocene-type ligand compound, to a metal compound containing the ligand compound, to a catalytic composition containing the metal compound, and to a method for preparing same, as well as to a method for preparing olefin polymers using the catalytic composition. The present invention provides a catalyst for preparing special polyolefin-based polymers having excellent activity.Type: GrantFiled: July 23, 2010Date of Patent: June 24, 2014Assignee: LG Chem, Ltd.Inventors: Sang-Jin Jeon, Hoon Chae, Cheon-Il Park, Kyung-Seop Noh, Won-Hee Kim
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Patent number: 8735312Abstract: The present invention relates to a catalyst composition and a process for preparing an olefin polymer using the same. More specifically, the present invention relates to a novel catalyst composition comprising at least two types of catalysts and a process for preparing an olefin polymer having excellent heat resistance using the same. The present invention can provide an olefin polymer having excellent activity and high heat resistance, and also can control the values of density, heat resistance and melt index (MI) of the olefin polymer.Type: GrantFiled: April 25, 2011Date of Patent: May 27, 2014Assignee: LG Chem, Ltd.Inventors: Kyung-Seop Noh, Hoon Chae, Cheon-Il Park, Won-Hee Kim, Sang-Jin Jeon, Eun-Jung Lee, Choong-Hoon Lee, Jong-Joo Ha
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Publication number: 20140011093Abstract: The present invention relates to a composition for preparing a separator for an electrochemical device, a method preparing a separator for an electrochemical device, and an electrochemical device having a separator prepared therefrom, more particularly, a composition for preparing a separator for an electrochemical device, comprising a polyolefin, a first diluent, and a second diluent, wherein an interaction energy between the first diluent and the second diluent is in the range of 2 to 3.5 cal/cm3, a method preparing a separator for an electrochemical device using the composition, and an electrochemical device having a separator prepared therefrom. In accordance with the present invention, the pore size of a polyolefin separator can be suitably controlled into a size desired by a user, and the high-temperature stability and mechanical property of the separator can be remarkably improved, thereby enhancing the life time and stability of an electrochemical device having the same.Type: ApplicationFiled: June 28, 2013Publication date: January 9, 2014Applicant: LG CHEM, LTD.Inventors: Bong-Tae KIM, Heon-Sik SONG, Cheon-Il PARK
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Publication number: 20130072646Abstract: The present invention relates to a catalyst composition and a process for preparing an olefin polymer using the same. More specifically, the present invention relates to a novel catalyst composition comprising at least two types of catalysts and a process for preparing an olefin polymer having excellent heat resistance using the same. The present invention can provide an olefin polymer having excellent activity and high heat resistance, and also can control the values of density, heat resistance and melt index (MI) of the olefin polymer.Type: ApplicationFiled: April 25, 2011Publication date: March 21, 2013Applicant: LG Chem, Ltd.Inventors: Kyung-Seop Noh, Hoon Chae, Cheon-Il Park, Won-Hee Kim, Sang-Jin Jeon, Eun-Jung Lee, Choong-Hoon Lee, Jong-Joo Ha
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Publication number: 20120196994Abstract: The present invention relates to a novel post metallocene-type ligand compound, to a metal compound containing the ligand compound, to a catalytic composition containing the metal compound, and to a method for preparing same, as well as to a method for preparing olefin polymers using the catalytic composition.Type: ApplicationFiled: July 23, 2010Publication date: August 2, 2012Inventors: Sang-Jin Jeon, Hoon Chae, Cheon-Il Park, Kyung-Seop Noh, Won-Hee Kim
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Publication number: 20120108772Abstract: The present invention relates to a method of producing an elastomer. Specifically, the method of producing an elastomer according to the present invention comprises a step of polymerizing ethylene, propylene, and optionally, a diene monomer in the presence of a catalyst composition containing a transition metal compound. The method of producing an elastomer according to the present invention makes it possible to prepare a high molecular weight, ethylene-propylene or ethylene-propylene-diene, elastic copolymer at a high temperature.Type: ApplicationFiled: December 29, 2011Publication date: May 3, 2012Inventors: Eun-Jung Lee, Sung-Soo Park, Beom-Doo Seo, Cheon-Il Park, Choong-Hoon Lee, Jong-Joo Ha, Jung-A Lee
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Patent number: 7776979Abstract: The present invention relates to a prepolymerized catalyst for olefin polymerization, a process for polymerizing an olefin by using the catalyst and a polyolefin produced by the process, in which a Ziegler-Natta catalyst is prepolymerized sequentially using ?-olefin and vinyl saturated cyclic hydrocarbon, and then an olefin is polymerized using the prepolymerized Ziegler-Natta catalyst, thereby producing a polyolefin with high yield. Therefore, the polymerized polyolefin has high Isotactic index, bulk density, and crystallinity.Type: GrantFiled: January 18, 2008Date of Patent: August 17, 2010Assignee: LG Chem, Ltd.Inventors: Ro-Mi Lee, Churl-Young Park, Cheon-Il Park, Dong-Ryul Im, Jin-Woo Lee, Nan-Young Lee