Patents by Inventor Gwijeong Cho
Gwijeong 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: 10050238Abstract: An organic light emitting display device can include a first electrode on a substrate; a first emission part on the first electrode, the first emission part including a first emission layer; a second emission part on the first emission part, the second emission part including a second emission layer; a third emission part on the second emission part, the third emission part including a third emission layer; and a second electrode on the third emission part, in which a first thickness between the substrate and the first emission layer, a second thickness between the first emission layer and the second emission layer, a third thickness between the second emission layer and the third emission layer, and a fourth thickness between the third emission layer and the second electrode are different from each other, and the first, second emission, and third emission parts include at least one organic layer.Type: GrantFiled: November 15, 2017Date of Patent: August 14, 2018Assignee: LG DISPLAY CO., LTD.Inventors: Gwijeong Cho, ChangWook Han, Taeil Kum, Taeshick Kim, Heedong Choi, JiYoung Kim, Mingyu Lee, Taeseok Lim
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Patent number: 10020458Abstract: A white organic light-emitting display device includes a red emission layer between a charge generation layer and a yellow-green emission layer and having a hole transport-type host. The white organic light-emitting display device can improve brightness, color gamut, and color shift rate since the red emission layer functions as a hole transport layer and an electron blocking layer, as well as an emission layer. The white organic light-emitting display device can further improve the efficiency of the red emission layer by reducing exciton quenching between the charge generation layer and the red emission layer by the insertion of an auxiliary layer composed of a hole transport-type host between the charge generation layer and the red emission layer.Type: GrantFiled: October 20, 2015Date of Patent: July 10, 2018Assignee: LG DISPLAY CO., LTD.Inventors: GwiJeong Cho, YounSeok Kam, TaeSun Yoo, TaeShick Kim, SeUng Kim
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Publication number: 20180076418Abstract: An organic light emitting display device can include a first electrode on a substrate; a first emission part on the first electrode, the first emission part including a first emission layer; a second emission part on the first emission part, the second emission part including a second emission layer; a third emission part on the second emission part, the third emission part including a third emission layer; and a second electrode on the third emission part, in which a first thickness between the substrate and the first emission layer, a second thickness between the first emission layer and the second emission layer, a third thickness between the second emission layer and the third emission layer, and a fourth thickness between the third emission layer and the second electrode are different from each other, and the first, second emission, and third emission parts include at least one organic layer.Type: ApplicationFiled: November 15, 2017Publication date: March 15, 2018Applicant: LG DISPLAY CO., LTD.Inventors: Gwijeong CHO, ChangWook HAN, Taeil KUM, Taeshick KIM, Heedong CHOI, JiYoung KIM, Mingyu LEE, TaeSeok LIM
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Patent number: 9847513Abstract: Discussed is an organic light emitting display device. The organic light emitting display device according to an embodiment includes a first electrode and a second electrode on a substrate to be opposite to each other and at least three emission parts between the first electrode and the second electrode. A first distance between the substrate and the first emission layer, a second distance between the first emission layer and the second emission layer, a third distance between the second emission layer and the third emission layer, and a fourth distance between the third emission layer and the second electrode are different from each other.Type: GrantFiled: December 7, 2015Date of Patent: December 19, 2017Assignee: LG DISPLAY CO., LTD.Inventors: Gwijeong Cho, ChangWook Han, Taeil Kum, Taeshick Kim, Heedong Choi, JiYoung Kim, Mingyu Lee, TaeSeok Lim
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Patent number: 9786863Abstract: Provided is a white organic light emitting device which can improve abnormal light emission and efficiency and reliability of the device. A white organic light emitting device according to an exemplary embodiment of the present invention includes: a first light emitting unit including a first emitting layer between a first electrode and a second electrode; a second light emitting unit including a second emitting layer on the first light emitting unit; and a charge generation layer between the first light emitting unit and the second light emitting unit, and a volume of a metal in the charge generation layer is 1.0% or less of the total volume of the charge generation layer.Type: GrantFiled: January 18, 2017Date of Patent: October 10, 2017Assignee: LG DISPLAY CO., LTD.Inventors: Taeil Kum, Gwijeong Cho, KiWoog Song, Taeshick Kim
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Publication number: 20170133618Abstract: Provided is a white organic light emitting device which can improve abnormal light emission and efficiency and reliability of the device. A white organic light emitting device according to an exemplary embodiment of the present invention includes: a first light emitting unit including a first emitting layer between a first electrode and a second electrode; a second light emitting unit including a second emitting layer on the first light emitting unit; and a charge generation layer between the first light emitting unit and the second light emitting unit, and a volume of a metal in the charge generation layer is 1.0% or less of the total volume of the charge generation layer.Type: ApplicationFiled: January 18, 2017Publication date: May 11, 2017Inventors: Taeil KUM, Gwijeong CHO, KiWoog SONG, Taeshick KIM
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Patent number: 9570696Abstract: Provided is a white organic light emitting device which can improve abnormal light emission and efficiency and reliability of the device. A white organic light emitting device according to an exemplary embodiment of the present invention includes: a first light emitting unit including a first emitting layer between a first electrode and a second electrode; a second light emitting unit including a second emitting layer on the first light emitting unit; and a charge generation layer between the first light emitting unit and the second light emitting unit, and a volume of a metal in the charge generation layer is 1.0% or less of the total volume of the charge generation layer.Type: GrantFiled: May 12, 2015Date of Patent: February 14, 2017Assignee: LG DISPLAY CO., LTD.Inventors: Taeil Kum, Gwijeong Cho, KiWoog Song, Taeshick Kim
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Patent number: 9455415Abstract: An organic light emitting device may include first and second electrodes; a first emitting part including a first emitting layer, the first emitting part provided between the first and second electrodes, and the first emitting layer having at least two emitting layers including a blue color emitting layer; a second emitting part including a second emitting layer, the second emitting part provided between the first emitting part and the second electrode, and the second emitting layer having at least two emitting layers including an emitting layer for emitting light having wavelength longer than that of the blue color emitting layer; and a third emitting part including a third emitting layer, the third emitting part provided between the second emitting part and the second electrode, and the third emitting layer having at least two emitting layers including a blue color emitting layer.Type: GrantFiled: March 27, 2015Date of Patent: September 27, 2016Assignee: LG Display Co., Ltd.Inventors: Shinhan Kim, Gwijeong Cho, Taeshick Kim, HyungJune Kim
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Publication number: 20160181563Abstract: A white organic light-emitting display device includes a red emission layer between a charge generation layer and a yellow-green emission layer and having a hole transport-type host. The white organic light-emitting display device can improve brightness, color gamut, and color shift rate since the red emission layer functions as a hole transport layer and an electron blocking layer, as well as an emission layer. The white organic light-emitting display device can further improve the efficiency of the red emission layer by reducing exciton quenching between the charge generation layer and the red emission layer by the insertion of an auxiliary layer composed of a hole transport-type host between the charge generation layer and the red emission layer.Type: ApplicationFiled: October 20, 2015Publication date: June 23, 2016Applicant: LG DISPLAY CO., LTD.Inventors: GwiJeong CHO, YounSeok KAM, TaeSun YOO, TaeShick KIM, SeUng KIM
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Publication number: 20160164042Abstract: Discussed is an organic light emitting display device. The organic light emitting display device according to an embodiment includes a first electrode and a second electrode on a substrate to be opposite to each other and at least three emission parts between the first electrode and the second electrode. A first distance between the substrate and the first emission layer, a second distance between the first emission layer and the second emission layer, a third distance between the second emission layer and the third emission layer, and a fourth distance between the third emission layer and the second electrode are different from each other.Type: ApplicationFiled: December 7, 2015Publication date: June 9, 2016Applicant: LG DISPLAY CO., LTD.Inventors: Gwijeong CHO, ChangWook HAN, Taeil KUM, Taeshick KIM, Heedong CHOI, JiYoung KIM, Mingyu LEE, TaeSeok LIM
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Patent number: 9281487Abstract: Provided is a white organic light emitting diode device, including first and second electrodes facing each other above a substrate, first and second charge generation layers formed between the first electrode and the second electrode, a first stack disposed between the first electrode and the first charge generation layer and including a first light emitting layer, a second stack disposed between the first charge generation layer and the second charge generation layer and including a second light emitting layer, and a third stack disposed between the second charge generation layer and the second electrode and including a third light emitting layer, wherein two of the first to third light emitting layers emit a blue light and the rest light emitting layer emits a yellow-green light.Type: GrantFiled: July 23, 2014Date of Patent: March 8, 2016Assignee: LG DISPLAY CO., LTD.Inventors: Shinhan Kim, Byungchul Ahn, Changwook Han, Dohyung Kim, Hongseok Choi, Sunghoon Pieh, Yoonheung Tak, Jeongdae Seo, Youngkwan Jung, Gwijeong Cho, Younseok Kam, Taeshick Kim
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Publication number: 20150372250Abstract: Provided is a white organic light emitting device which can improve abnormal light emission and efficiency and reliability of the device. A white organic light emitting device according to an exemplary embodiment of the present invention includes: a first light emitting unit including a first emitting layer between a first electrode and a second electrode; a second light emitting unit including a second emitting layer on the first light emitting unit; and a charge generation layer between the first light emitting unit and the second light emitting unit, and a volume of a metal in the charge generation layer is 1.0% or less of the total volume of the charge generation layer.Type: ApplicationFiled: May 12, 2015Publication date: December 24, 2015Inventors: Taeil KUM, Gwijeong CHO, KiWoog SONG, Taeshick KIM
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Publication number: 20150280159Abstract: An organic light emitting device may include first and second electrodes; a first emitting part including a first emitting layer, the first emitting part provided between the first and second electrodes, and the first emitting layer having at least two emitting layers including a blue color emitting layer; a second emitting part including a second emitting layer, the second emitting part provided between the first emitting part and the second electrode, and the second emitting layer having at least two emitting layers including an emitting layer for emitting light having wavelength longer than that of the blue color emitting layer; and a third emitting part including a third emitting layer, the third emitting part provided between the second emitting part and the second electrode, and the third emitting layer having at least two emitting layers including a blue color emitting layer.Type: ApplicationFiled: March 27, 2015Publication date: October 1, 2015Applicant: LG Display Co., Ltd.Inventors: Shinhan Kim, Gwijeong Cho, Taeshick Kim, HyungJune Kim
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Publication number: 20150034923Abstract: Provided is a white organic light emitting diode device, including first and second electrodes facing each other above a substrate, first and second charge generation layers formed between the first electrode and the second electrode, a first stack disposed between the first electrode and the first charge generation layer and including a first light emitting layer, a second stack disposed between the first charge generation layer and the second charge generation layer and including a second light emitting layer, and a third stack disposed between the second charge generation layer and the second electrode and including a third light emitting layer, wherein two of the first to third light emitting layers emit a blue light and the rest light emitting layer emits a yellow-green light.Type: ApplicationFiled: July 23, 2014Publication date: February 5, 2015Inventors: Shinhan KIM, Byungchul AHN, Changwook HAN, Dohyung KIM, Hongseok CHOI, Sunghoon PIEH, Yoonheung TAK, Jeongdae SEO, Youngkwan JUNG, Gwijeong CHO, Younseok KAM, Taeshick KIM
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Patent number: 8872216Abstract: An organic light emitting device and a method for manufacturing the same are provided. The organic light emitting device comprises: a substrate; a first electrode disposed on the substrate; a hole function layer disposed on the first electrode; a first emission layer disposed on the hole function layer; a second emission layer disposed on the first emission layer; an electron function layer disposed on the second emission layer; and a second electrode disposed on the electron function layer, wherein the hole function layer and the first emission layer are melted.Type: GrantFiled: October 27, 2011Date of Patent: October 28, 2014Assignee: LG Display Co., Ltd.Inventors: Sangdae Kim, Sunghoon Choi, Gwijeong Cho
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Publication number: 20120104451Abstract: An organic light emitting device and a method for manufacturing the same are provided. The organic light emitting device comprises: a substrate; a first electrode disposed on the substrate; a hole function layer disposed on the first electrode; a first emission layer disposed on the hole function layer; a second emission layer disposed on the first emission layer; an electron function layer disposed on the second emission layer; and a second electrode disposed on the electron function layer, wherein the hole function layer and the first emission layer are melted.Type: ApplicationFiled: October 27, 2011Publication date: May 3, 2012Inventors: Sangdae Kim, Sunghoon Choi, Gwijeong Cho