Patents by Inventor Youn-Seok KAM
Youn-Seok KAM 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: 11005061Abstract: An organic light emitting display device includes a first electrode and a second electrode disposed on a substrate opposite to each other, a first stack including a hole injection layer, a first hole transport layer, a first light emitting layer, and a first electron transport layer sequentially stacked on the first electrode, a second stack including a second hole transport layer, a second light emitting layer, and a second electron transport layer sequentially stacked between the first stack and the second electrode, and a charge generation layer disposed between the first stack and the second stack and including an N-type charge generation layer and a P-type charge generation layer to control charge balance between the first and second stacks. The P-type charge generation layer is doped with 1% to 20% of a hole transport material based on a volume of the P-type charge generation layer.Type: GrantFiled: December 5, 2013Date of Patent: May 11, 2021Assignee: LG Display Co., Ltd.Inventors: Ki-Woog Song, Chang-Wook Han, Hong-Seok Choi, Sung-Hoon Pieh, Jeong-Dae Seo, Seok-Joon Oh, Youn-Seok Kam
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Patent number: 10431765Abstract: Disclosed are a tandem white organic light emitting diode with long lifespan and low driving voltage, and a display device including the same. The white organic light emitting diode includes a first light emitting part, a second light emitting part and a third light emitting part disposed between a first electrode and a second electrode. The first and third light emitting parts include a blue light emitting layer and the second light emitting part includes a red light emitting layer and a yellow-green light emitting layer. At least one layer of the red light emitting layer and the yellow-green light emitting layer includes a hole transport host based on a compound shown below: wherein each of R1, R2, and R3 are independently selected from hydrogen, heavy hydrogen, a C5-C7 aromatic cyclic and C1-C6 heterocyclic group.Type: GrantFiled: August 31, 2017Date of Patent: October 1, 2019Assignee: LG Display Co., Ltd.Inventors: Ji-Young Kim, Youn-Seok Kam, Ki-Woog Song, Tae-Shick Kim, Min-Gyu Lee, Tae-Seok Lim
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Patent number: 10347858Abstract: A white organic light emitting device includes a first emission part between a first electrode and a second electrode, and configured to include a first emission layer, the first electrode being a reflective electrode, a second emission part on the first emission part, and configured to include a second emission layer, and a third emission part on the second emission part, and configured to include a third emission layer.Type: GrantFiled: March 15, 2018Date of Patent: July 9, 2019Assignee: LG DISPLAY CO., LTD.Inventors: Ki-Woog Song, Sung Hoon Pieh, Youn Seok Kam, Tae Shick Kim, Se Ung Kim, Hyung June Kim
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Patent number: 10157966Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, a charge generation layer formed between the first and second electrodes, a first light emitting stack formed between the charge generation layer and the first electrode, and a second light emitting stack formed between the charge generation layer and the second electrode, wherein a hole injection layer of a light emitting stack to realize blue color of the first and second light emitting stacks is formed by doping a host formed of hexaazatriphenylene (HAT-CN) with 0.5% to less than 10% of a dopant formed of a hole transporting material based on a volume of the hole injection layer.Type: GrantFiled: June 28, 2016Date of Patent: December 18, 2018Assignee: LG Display Co., Ltd.Inventors: Youn-Seok Kam, Chang-Wook Han, Hong-Seok Choi, Sung-Hoon Pieh, Seok-Joon Oh, Ki-Woog Song
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Patent number: 10096791Abstract: An organic light emitting diode and an organic light emitting display apparatus using the organic light emitting diode are provided. The organic light emitting diode includes a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode to emit white light, and the organic layer is configured to emit white light in which an X-axis coordinate value in a color coordinate system is equal to or greater than 0.29, a Y-axis coordinate value in the color coordinate system is in a range of 0.32 to 0.45, and the Y-axis coordinate value in the color coordinate system is equal to or greater than the X-axis coordinate value in the color coordinate system.Type: GrantFiled: October 13, 2017Date of Patent: October 9, 2018Assignee: LG DISPLAY CO., LTD.Inventors: Youn Seok Kam, Chang Wook Han, Jae Man Lee, Se Ung Kim
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Publication number: 20180205029Abstract: A white organic light emitting device includes a first emission part between a first electrode and a second electrode, and configured to include a first emission layer, the first electrode being a reflective electrode, a second emission part on the first emission part, and configured to include a second emission layer, and a third emission part on the second emission part, and configured to include a third emission layer.Type: ApplicationFiled: March 15, 2018Publication date: July 19, 2018Applicant: LG DISPLAY CO., LTD.Inventors: Ki-Woog SONG, Sung Hoon PIEH, Youn Seok KAM, Tae Shick KIM, Se Ung KIM, Hyung June KIM
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Patent number: 9966551Abstract: Discussed is a white organic light emitting device for enhancing emission efficiency and panel efficiency. The white organic light emitting device can include a first emission part between a first electrode and a second electrode and configured to include a first emission layer (EML), a second emission part on the first emission part and configured to include a second EML, and a third emission part on the second emission part and configured to include a third EML. The first to third emission parts have an emission position of emitting layers (EPEL) structure in which the first to third emission parts have a maximum emission range in respective emission areas of the first to third EMLs.Type: GrantFiled: May 22, 2017Date of Patent: May 8, 2018Assignee: LG DISPLAY CO., LTD.Inventors: Ki-Woog Song, Sung Hoon Pieh, Youn Seok Kam, Tae Shick Kim, Se Ung Kim, Hyung June Kim
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Publication number: 20180062103Abstract: Disclosed are a tandem white organic light emitting diode with long lifespan and low driving voltage, and a display device including the same. The white organic light emitting diode includes a first light emitting part, a second light emitting part and a third light emitting part disposed between a first electrode and a second electrode. The first and third light emitting parts include a blue light emitting layer and the second light emitting part includes a red light emitting layer and a yellow-green light emitting layer. At least one layer of the red light emitting layer and the yellow-green light emitting layer includes a hole transport host based on a compound shown below: wherein each of R1, R2, and R3 are independently selected from hydrogen, heavy hydrogen, a C5-C7 aromatic cyclic and C1-C6 heterocyclic group.Type: ApplicationFiled: August 31, 2017Publication date: March 1, 2018Inventors: Ji-Young Kim, Youn-Seok Kam, Ki-Woog Song, Tae-Shick Kim, Min-Gyu Lee, Tae-Seok Lim
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Publication number: 20180053908Abstract: An organic light emitting diode and an organic light emitting display apparatus using the organic light emitting diode are provided. The organic light emitting diode includes a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode to emit white light, and the organic layer is configured to emit white light in which an X-axis coordinate value in a color coordinate system is equal to or greater than 0.29, a Y-axis coordinate value in the color coordinate system is in a range of 0.32 to 0.45, and the Y-axis coordinate value in the color coordinate system is equal to or greater than the X-axis coordinate value in the color coordinate system.Type: ApplicationFiled: October 13, 2017Publication date: February 22, 2018Inventors: Youn Seok KAM, Chang Wook HAN, Jae Man LEE, Se Ung KIM
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Patent number: 9825245Abstract: An organic light emitting diode and an organic light emitting display apparatus using the organic light emitting diode are provided. The organic light emitting diode includes a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode to emit white light, and the organic layer is configured to emit white light in which an X-axis coordinate value in a color coordinate system is equal to or greater than 0.29, a Y-axis coordinate value in the color coordinate system is in a range of 0.32 to 0.45, and the Y-axis coordinate value in the color coordinate system is equal to or greater than the X-axis coordinate value in the color coordinate system.Type: GrantFiled: October 16, 2015Date of Patent: November 21, 2017Assignee: LG DISPLAY CO., LTD.Inventors: Youn Seok Kam, Chang Wook Han, Jae Man Lee, Se Ung Kim
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Publication number: 20170263877Abstract: Discussed is a white organic light emitting device for enhancing emission efficiency and panel efficiency. The white organic light emitting device can include a first emission part between a first electrode and a second electrode and configured to include a first emission layer (EML), a second emission part on the first emission part and configured to include a second EML, and a third emission part on the second emission part and configured to include a third EML. The first to third emission parts have an emission position of emitting layers (EPEL) structure in which the first to third emission parts have a maximum emission range in respective emission areas of the first to third EMLs.Type: ApplicationFiled: May 22, 2017Publication date: September 14, 2017Applicant: LG Display Co., Ltd.Inventors: Ki-Woog SONG, Sung Hoon PIEH, Youn Seok KAM, Tae Shick KIM, Se Ung KIM, Hyung June KIM
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Patent number: 9685622Abstract: Discussed is a white organic light emitting device for enhancing emission efficiency and panel efficiency. The white organic light emitting device can include a first emission part between a first electrode and a second electrode and configured to include a first emission layer (EML), a second emission part on the first emission part and configured to include a second EML, and a third emission part on the second emission part and configured to include a third EML. The first to third emission parts have an emission position of emitting layers (EPEL) structure in which the first to third emission parts have a maximum emission range in respective emission areas of the first to third EMLs.Type: GrantFiled: March 30, 2015Date of Patent: June 20, 2017Assignee: LG Display Co., Ltd.Inventors: Ki-Woog Song, Sung Hoon Pieh, Youn Seok Kam, Tae Shick Kim, Se Ung Kim, Hyung June Kim
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Publication number: 20160307970Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, a charge generation layer formed between the first and second electrodes, a first light emitting stack formed between the charge generation layer and the first electrode, and a second light emitting stack formed between the charge generation layer and the second electrode, wherein a hole injection layer of a light emitting stack to realize blue color of the first and second light emitting stacks is formed by doping a host formed of hexaazatriphenylene (HAT-CN) with 0.5% to less than 10% of a dopant formed of a hole transporting material based on a volume of the hole injection layer.Type: ApplicationFiled: June 28, 2016Publication date: October 20, 2016Inventors: Youn-Seok KAM, Chang-Wook HAN, Hong-Seok CHOI, Sung-Hoon PIEH, Seok-Joon OH, Ki-Woog SONG
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Patent number: 9431626Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, a charge generation layer formed between the first and second electrodes, a first light emitting stack formed between the charge generation layer and the first electrode, and a second light emitting stack formed between the charge generation layer and the second electrode, wherein a hole injection layer of a light emitting stack to realize blue color of the first and second light emitting stacks is formed by doping a host formed of hexaazatriphenylene (HAT-CN) with 0.5% to less than 10% of a dopant formed of a hole transporting material based on a volume of the hole injection layer.Type: GrantFiled: December 19, 2013Date of Patent: August 30, 2016Assignee: LG Display Co., Ltd.Inventors: Youn-Seok Kam, Chang-Wook Han, Hong-Seok Choi, Sung-Hoon Pieh, Seok-Joon Oh, Ki-Woog Song
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Patent number: 9425422Abstract: Disclosed is an organic light emitting display device with an enhanced light emission efficiency at high current and an enhancement in panel efficiency through prevention of a roll-off phenomenon. The organic light emitting display device includes first and second electrodes formed on a substrate facing each other. A hole injection layer, a hole transport layer, at least first and second light emitting layers, and an electron transport layer are sequentially stacked between the first and second electrodes. The first light emitting layer includes different hosts while being doped with the same dopant in different dosages. The first light emitting layer includes a first host and a second host, and the second light emitting layer includes the first host and a third host different from the second host. The first and second light emitting layers are doped with the same phosphorescent yellow-phosphorescent green dopant in the same dosage.Type: GrantFiled: September 11, 2013Date of Patent: August 23, 2016Assignee: LG Display Co., Ltd.Inventors: Shin-Han Kim, Hwa-Kyung Kim, Hong-Seok Choi, Gwi-Jeong Cho, Youn-Seok Kam, Mi-Young Han, Hye-Min Oh, Tae-Shick Kim, Seong-Su Jeon, Chi-Yul Song
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Publication number: 20160149151Abstract: An organic light emitting diode and an organic light emitting display apparatus using the organic light emitting diode are provided. The organic light emitting diode includes a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode to emit white light, and the organic layer is configured to emit white light in which an X-axis coordinate value in a color coordinate system is equal to or greater than 0.29, a Y-axis coordinate value in the color coordinate system is in a range of 0.32 to 0.45, and the Y-axis coordinate value in the color coordinate system is equal to or greater than the X-axis coordinate value in the color coordinate system.Type: ApplicationFiled: October 16, 2015Publication date: May 26, 2016Inventors: Youn Seok KAM, Chang Wook HAN, Jae Man LEE, Se Ung KIM
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Patent number: 9184405Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, at least one emission layer formed between the first and second electrodes, a hole transport layer formed between the first electrode and the emission layer, and an electron transport layer formed between the second electrode and the emission layer, wherein the emission layer includes a first emission mixed layer formed on the hole transport layer, the first emission mixed layer including a first hole-type host and a first phosphorescent dopant, and a second emission mixed layer formed between the first emission mixed layer and the electron transport layer, the second emission mixed layer including a first electron-type host and a second phosphorescent dopant.Type: GrantFiled: November 6, 2013Date of Patent: November 10, 2015Assignee: LG DISPLAY CO., LTD.Inventors: Ki-Woog Song, Sung-Hoon Pieh, Seok-Joon Oh, Youn-Seok Kam, Dong-Hyuk Kim, Seon-Keun Yoo, Tae-Shick Kim
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Publication number: 20150280161Abstract: Discussed is a white organic light emitting device for enhancing emission efficiency and panel efficiency. The white organic light emitting device can include a first emission part between a first electrode and a second electrode and configured to include a first emission layer (EML), a second emission part on the first emission part and configured to include a second EML, and a third emission part on the second emission part and configured to include a third EML. The first to third emission parts have an emission position of emitting layers (EPEL) structure in which the first to third emission parts have a maximum emission range in respective emission areas of the first to third EMLs.Type: ApplicationFiled: March 30, 2015Publication date: October 1, 2015Applicant: LG DISPLAY CO., LTD.Inventors: Ki-Woog SONG, Sung Hoon PIEH, Youn Seok KAM, Tae Shick KIM, Se Ung KIM, Hyung June KIM
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Patent number: 8884274Abstract: A device for achieving reduced driving voltage and enhanced color stability under high luminance conditions includes an anode and cathode arranged on a substrate to be opposite each other, a charge generation layer between the anode and the cathode, a first stack formed between the anode and the charge generation layer and including a first light emitting layer, and a second stack formed between the charge generation layer and the cathode and including a second light emitting layer in which first and second hosts are doped with phosphorescent dopant, a HOMO level of the first host is greater than that of the second host, and a LUMO level of the first host is greater than an LUMO level of the second host.Type: GrantFiled: October 10, 2012Date of Patent: November 11, 2014Assignee: LG Display Co., Ltd.Inventors: Mi-Young Han, Chang-Je Sung, Youn-Seok Kam, Shin-Han Kim
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Publication number: 20140183494Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, a charge generation layer formed between the first and second electrodes, a first light emitting stack formed between the charge generation layer and the first electrode, and a second light emitting stack formed between the charge generation layer and the second electrode, wherein a hole injection layer of a light emitting stack to realize blue color of the first and second light emitting stacks is formed by doping a host formed of hexaazatriphenylene (HAT-CN) with 0.5% to less than 10% of a dopant formed of a hole transporting material based on a volume of the hole injection layer.Type: ApplicationFiled: December 19, 2013Publication date: July 3, 2014Applicant: LG Display Co., Ltd.Inventors: Youn-Seok KAM, Chang-Wook HAN, Hong-Seok CHOI, Sung-Hoon PIEH, Seok-Joon OH, Ki-Woog SONG