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).

  • Patent number: 11186675
    Abstract: 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: Grant
    Filed: June 4, 2018
    Date of Patent: November 30, 2021
    Assignee: LSIS CO., LTD.
    Inventors: Sang-Eon Kim, Wook-Dong Cho, Heon-Seop Song, Tae-Yun Kang, Han-Gil Kim, Hyeon-Jeong Choi
  • Publication number: 20190169358
    Abstract: 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: Application
    Filed: June 4, 2018
    Publication date: June 6, 2019
    Inventors: Sang-Eon KIM, Wook-Dong CHO, Heon-Seop SONG, Tae-Yun KANG, Han-Gil KIM, Hyeon-Jeong CHOI
  • Patent number: 8968884
    Abstract: 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: Grant
    Filed: November 7, 2008
    Date of Patent: March 3, 2015
    Assignee: 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
  • Patent number: 8586968
    Abstract: 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: Grant
    Filed: March 14, 2007
    Date of Patent: November 19, 2013
    Assignee: 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
  • Patent number: 8410475
    Abstract: 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: Grant
    Filed: December 3, 2007
    Date of Patent: April 2, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Byung-Sun Jeon, Jeung-Gon Kim, Wook-Dong Cho, Chang-Hwan Kim, Hyun Nam
  • Patent number: 8198801
    Abstract: 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: Grant
    Filed: March 18, 2005
    Date of Patent: June 12, 2012
    Assignee: 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: 8071227
    Abstract: 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: Grant
    Filed: December 3, 2007
    Date of Patent: December 6, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Byung-Sun Jeon, Wook-Dong Cho, Jeung-Gon Kim, Sang-Young Jeon, Yeon-Hwan Kim
  • Patent number: 8026514
    Abstract: 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: Grant
    Filed: April 25, 2008
    Date of Patent: September 27, 2011
    Assignee: 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
  • Publication number: 20110127495
    Abstract: 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: Application
    Filed: November 7, 2008
    Publication date: June 2, 2011
    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
  • Patent number: 7892658
    Abstract: 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: Grant
    Filed: September 23, 2005
    Date of Patent: February 22, 2011
    Assignee: 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
  • Patent number: 7842404
    Abstract: 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: Grant
    Filed: September 23, 2005
    Date of Patent: November 30, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Dong Seob Jeong, Seok Hee Yoon, Jae Min Moon
  • Patent number: 7842405
    Abstract: 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: Grant
    Filed: September 23, 2005
    Date of Patent: November 30, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Jun Gi Jang, Seok Hee Yoon, Jae Min Moon
  • Patent number: 7838129
    Abstract: 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: Grant
    Filed: September 23, 2005
    Date of Patent: November 23, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Seok Hee Yoon, Jae Min Moon
  • Publication number: 20100289008
    Abstract: 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: Application
    Filed: March 14, 2007
    Publication date: November 18, 2010
    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
  • Patent number: 7824779
    Abstract: 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: Grant
    Filed: September 23, 2005
    Date of Patent: November 2, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Jun Gi Jang, Seok Hee Yoon, Jae Min Moon
  • Patent number: 7820306
    Abstract: 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: Grant
    Filed: September 23, 2005
    Date of Patent: October 26, 2010
    Assignee: 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
  • Patent number: 7816019
    Abstract: 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: Grant
    Filed: September 23, 2005
    Date of Patent: October 19, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Sang Young Jeon, Seok Hee Yoon, Jae Min Moon
  • Patent number: 7811682
    Abstract: 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: Grant
    Filed: September 24, 2005
    Date of Patent: October 12, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Seok Hee Yoon, Jae Min Moon
  • Patent number: 7799441
    Abstract: 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: Grant
    Filed: September 23, 2005
    Date of Patent: September 21, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Min Jeong Lee, Seok Hee Yoon, Jae Min Moon
  • Patent number: 7785720
    Abstract: 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: Grant
    Filed: September 23, 2005
    Date of Patent: August 31, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Wook Dong Cho, Ji Eun Kim, Byung Sun Jeon, Dong Seob Jeong, Seok Hee Yoon, Jae Min Moon