Patents by Inventor Wook Dong Cho
Wook Dong Cho 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: 11186675Abstract: The disclosure describes an epoxy resin composition and a transformer including the same. The epoxy resin composition according to an embodiment of the present invention includes an epoxy resin having a glycol-based functional group in a main chain, a filler, a curing agent, and an imidazole-based catalyst, and the transformer according to an embodiment includes an insulated conductor wound in multiple layers in a vertical direction; a semi-conductive layer which is provided on the insulated conductor and disperses a concentrated electric field; and an insulator which is casted on the insulated conductor and the semi-conductive layer and forms an outer shape of the transformer, and the insulator consists of the epoxy resin composition including the epoxy resin having the glycol-based functional group in the main chain, the filler, the curing agent, and the imidazole-based catalyst.Type: GrantFiled: June 4, 2018Date of Patent: November 30, 2021Assignee: LSIS CO., LTD.Inventors: Sang-Eon Kim, Wook-Dong Cho, Heon-Seop Song, Tae-Yun Kang, Han-Gil Kim, Hyeon-Jeong Choi
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Publication number: 20190169358Abstract: The disclosure describes an epoxy resin composition and a transformer including the same. The epoxy resin composition according to an embodiment of the present invention includes an epoxy resin having a glycol-based functional group in a main chain, a filler, a curing agent, and an imidazole-based catalyst, and the transformer according to an embodiment includes an insulated conductor wound in multiple layers in a vertical direction; a semi-conductive layer which is provided on the insulated conductor and disperses a concentrated electric field; and an insulator which is casted on the insulated conductor and the semi-conductive layer and forms an outer shape of the transformer, and the insulator consists of the epoxy resin composition including the epoxy resin having the glycol-based functional group in the main chain, the filler, the curing agent, and the imidazole-based catalyst.Type: ApplicationFiled: June 4, 2018Publication date: June 6, 2019Inventors: Sang-Eon KIM, Wook-Dong CHO, Heon-Seop SONG, Tae-Yun KANG, Han-Gil KIM, Hyeon-Jeong CHOI
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Patent number: 8968884Abstract: The present invention provides a novel compound that is capable of largely improving life span, efficiency, electrochemical stability and thermal stability of the organic light emitting device, and an organic light emitting device in which said compound is included in an organic compound layer.Type: GrantFiled: November 7, 2008Date of Patent: March 3, 2015Assignee: LG Chem, Ltd.Inventors: Sung-Kil Hong, Wook-Dong Cho, Jae-Soon Bae, Ji-Eun Kim, Hyun Nam, Jun-Gi Jang, Byung-Sun Jeon, Mun-Kyu Joo, Hye-Young Jang
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Patent number: 8586968Abstract: The present invention provides an organic light emitting device comprising a first electrode, a second electrode, and at least two organic material layers interposed therebetween, including a light emitting layer, wherein the organic material layers comprise at least one layer of a hole injecting layer, a hole transporting layer and a hole injecting and transporting layer, and at least one of the hole injecting layer, the hole transporting layer and the hole injecting and transporting layer comprises a material with a HOMO energy level of ?4 eV or less, and a material with a LUMO energy level of ?4 eV or less, and a process for preparing the same.Type: GrantFiled: March 14, 2007Date of Patent: November 19, 2013Assignee: LG Chem, Ltd.Inventors: Jun-Gi Jang, Chang-Hwan Kim, Dong-Seob Jeong, Sang-Young Jeon, Kong-Kyeom Kim, Wook-Dong Cho, Ji-Eun Kim, Byung-Sun Jeon
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Patent number: 8410475Abstract: Disclosed are new compounds and an organic light emitting diode using the same. The organic light emitting diode using the new compound according to the present invention exhibits excellent characteristics in terms of actuating voltage, light efficiency, and lifespan.Type: GrantFiled: December 3, 2007Date of Patent: April 2, 2013Assignee: LG Chem, Ltd.Inventors: Byung-Sun Jeon, Jeung-Gon Kim, Wook-Dong Cho, Chang-Hwan Kim, Hyun Nam
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Materials for injecting or transporting holes and organic electroluminescence devices using the same
Patent number: 8198801Abstract: The present invention relates to a novel compound that can significantly improve the lifespan, efficiency and thermal stability of an organic light emitting device, and to an organic electroluminescence device or light emitting device comprising the compound in an organic compound layer is also disclosed.Type: GrantFiled: March 18, 2005Date of Patent: June 12, 2012Assignee: LG Chem, Ltd.Inventors: Ji Eun Kim, Jae Chol Lee, Kong Kyeom Kim, Jae Soon Bae, Jun Gi Jang, Sang Young Jeon, Min Soo Kang, Wook Dong Cho, Byung Sun Jeon, Yeon Hwan Kim -
Patent number: 8071227Abstract: Disclosed are new compounds and an organic light emitting diode using the same. The organic light emitting diode using the new compound according to the present invention exhibits excellent characteristics in terms of actuating voltage, light efficiency, and lifespan.Type: GrantFiled: December 3, 2007Date of Patent: December 6, 2011Assignee: LG Chem, Ltd.Inventors: Byung-Sun Jeon, Wook-Dong Cho, Jeung-Gon Kim, Sang-Young Jeon, Yeon-Hwan Kim
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Patent number: 8026514Abstract: The present invention relates to a new diamine derivative, and an organic electronic device using the same. The diamine derivative according to the present invention can serve as a hole injecting, hole transporting, electron injecting, electron transporting, or light emitting material in an organic electronic device including an organic light emitting device. Particularly, it can serve as a light emitting dopant as used alone, in particular, a blue light emitting dopant. The organic electronic device according to the present invention exhibits excellent characteristics in terms of efficiency, drive voltage, life time, and stability.Type: GrantFiled: April 25, 2008Date of Patent: September 27, 2011Assignee: LG Chem, Ltd.Inventors: Hye-Young Jang, Kong-Kyeom Kim, Jae-Chol Lee, Ji-Eun Kim, Seong-So Kim, Jin-Kyoon Park, Tae-Yoon Park, Eun-Ju Kim, Wook-Dong Cho, Byung-Sun Jeon, Jae-Soon Bae
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Publication number: 20110127495Abstract: The present invention provides a novel compound that is capable of largely improving life span, efficiency, electrochemical stability and thermal stability of the organic light emitting device, and an organic light emitting device in which said compound is included in an organic compound layer.Type: ApplicationFiled: November 7, 2008Publication date: June 2, 2011Inventors: Sung-Kil Hong, Wook-Dong Cho, Jae-Soon Bae, Ji-Eun Kim, Hyun Nam, Jun-Gi Jang, Byung-Sun Jeon, Mun-Kyu Joo, Hye-Young Jang
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Patent number: 7892658Abstract: Disclosed is an organic light emitting device. The organic light emitting device comprises a first electrode, organic material layer(s) comprising a light emitting layer, and a second electrode. The first electrode, the organic material layer(s), and the second electrode form layered structure and at least one layer of the organic material layer(s) include the compound of Formula 1 or the compound of Formula 1 into which a thermosetting or photo-crosslinkable functional group is introduced.Type: GrantFiled: September 23, 2005Date of Patent: February 22, 2011Assignee: LG Chem, Ltd.Inventors: Seok Hee Yoon, Jae Min Moon, In Ho Hwang, Min Jeong Lee, Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon
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Patent number: 7842404Abstract: Disclosed is an organic light emitting device. The organic light emitting device comprises a first electrode, organic material layer(s) comprising a light emitting layer, and a second electrode. The first electrode, the organic material layer(s), and the second electrode form layered structure and at least one layer of the organic material layer(s) include the compound of Formula 1 or the compound of Formula 1 into which a thermosetting or photo-crosslinkable functional group is introduced.Type: GrantFiled: September 23, 2005Date of Patent: November 30, 2010Assignee: LG Chem, Ltd.Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Dong Seob Jeong, Seok Hee Yoon, Jae Min Moon
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Patent number: 7842405Abstract: Disclosed is an organic light emitting device. The organic light emitting device comprises a first electrode, organic material layer(s) comprising a light emitting layer, and a second electrode. The first electrode, the organic material layer(s), and the second electrode form layered structure and at least one layer of the organic material layer(s) include the compound of Formula 1 or the compound of Formula 1 into which a thermosetting or photo-crosslinkable functional group is introduced.Type: GrantFiled: September 23, 2005Date of Patent: November 30, 2010Assignee: LG Chem, Ltd.Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Jun Gi Jang, Seok Hee Yoon, Jae Min Moon
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Patent number: 7838129Abstract: Disclosed is a novel compound which is capable of significantly improving a lifespan, efficiency, and electrochemical and thermal stabilities of an organic light emitting device, the production of the compound, and an organic light emitting device in which the compound is contained in an organic compound layer.Type: GrantFiled: September 23, 2005Date of Patent: November 23, 2010Assignee: LG Chem, Ltd.Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Seok Hee Yoon, Jae Min Moon
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Publication number: 20100289008Abstract: The present invention provides an organic light emitting device comprising a first electrode, a second electrode, and at least two organic material layers interposed therebetween, including a light emitting layer, wherein the organic material layers comprise at least one layer of a hole injecting layer, a hole transporting layer and a hole injecting and transporting layer, and at least one of the hole injecting layer, the hole transporting layer and the hole injecting and transporting layer comprises a material with a HOMO energy level of ˜4 eV or less, and a material with a LUMO energy level of ?4 eV or less, and a process for preparing the same.Type: ApplicationFiled: March 14, 2007Publication date: November 18, 2010Inventors: Jun-Gi Jang, Chang-Hwan Kim, Dong-Seob Jeong, Sang-Young Jeon, Kong-Kyeom Kim, Wook-Dong Cho, Ji-Eun Kim, Byung-Sun Jeon
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Patent number: 7824779Abstract: Disclosed is an organic light emitting device. The organic light emitting device comprises a first electrode, organic material layer(s) comprising a light emitting layer, and a second electrode. The first electrode, the organic material layer(s), and the second electrode form layered structure and at least one layer of the organic material layer(s) include the compound of Formula 1 or the compound of Formula 1 into which a thermosetting or photo-crosslinkable functional group is introduced.Type: GrantFiled: September 23, 2005Date of Patent: November 2, 2010Assignee: LG Chem, Ltd.Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Jun Gi Jang, Seok Hee Yoon, Jae Min Moon
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Patent number: 7820306Abstract: Disclosed is an organic light emitting device. The organic light emitting device comprises a first electrode, organic material layer(s) comprising a light emitting layer, and a second electrode. The first electrode, the organic material layer(s), and the second electrode form layered structure and at least one layer of the organic material layer(s) include the compound of Formula 1 or the compound of Formula 1 into which a thermosetting or photo-crosslinkable functional group is introduced.Type: GrantFiled: September 23, 2005Date of Patent: October 26, 2010Assignee: LG Chem, Ltd.Inventors: Seok Hee Yoon, Jae Min Moon, In Ho Hwang, Min Jeong Lee, Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon
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Patent number: 7816019Abstract: Disclosed is an organic light emitting device. The organic light emitting device comprises a first electrode, organic material layer(s) comprising a light emitting layer, and a second electrode. The first electrode, the organic material layer(s), and the second electrode form layered structure and at least one layer of the organic material layer(s) include the compound of Formula 1 or the compound of Formula 1 into which a thermosetting or photo-crosslinkable functional group is introduced.Type: GrantFiled: September 23, 2005Date of Patent: October 19, 2010Assignee: LG Chem, Ltd.Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Sang Young Jeon, Seok Hee Yoon, Jae Min Moon
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Patent number: 7811682Abstract: Disclosed is a novel compound which is capable of significantly improving a lifespan, efficiency, and electrochemical and thermal stabilities of an organic light emitting device, the production of the compound, and an organic light emitting device in which the compound is contained in an organic compound layer.Type: GrantFiled: September 24, 2005Date of Patent: October 12, 2010Assignee: LG Chem, Ltd.Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Seok Hee Yoon, Jae Min Moon
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Patent number: 7799441Abstract: Disclosed is an organic light emitting device. The organic light emitting device comprises a first electrode, organic material layer(s) comprising a light emitting layer, and a second electrode. The first electrode, the organic material layer(s), and the second electrode form layered structure and at least one layer of the organic material layer(s) include the compound of Formula 1 or the compound of Formula 1 into which a thermosetting or photo-crosslinkable functional group is introduced.Type: GrantFiled: September 23, 2005Date of Patent: September 21, 2010Assignee: LG Chem, Ltd.Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Min Jeong Lee, Seok Hee Yoon, Jae Min Moon
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Patent number: 7785720Abstract: Disclosed is an organic light emitting device. The organic light emitting device comprises a first electrode, organic material layer(s) comprising a light emitting layer, and a second electrode. The first electrode, the organic material layer(s), and the second electrode form layered structure and at least one layer of the organic material layer(s) include the compound of Formula 1 or the compound of Formula 1 into which a thermosetting or photo-crosslinkable functional group is introduced.Type: GrantFiled: September 23, 2005Date of Patent: August 31, 2010Assignee: LG Chem, Ltd.Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Dong Seob Jeong, Seok Hee Yoon, Jae Min Moon