Patents by Inventor Ki-Woog Song
Ki-Woog Song 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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Publication number: 20220209154Abstract: A white light emitting device and a light emitting display device including the same, in which the relationship between the triplet energy levels of dopants of emission layers is appropriately adjusted so as to improve the efficiency of the white light emitting device and the light emitting display device, thereby increasing a color temperature and enabling rich color representation.Type: ApplicationFiled: December 23, 2021Publication date: June 30, 2022Applicant: LG DISPLAY CO., LTD.Inventors: Yong Hwan KIM, Ki Woog SONG, Ji Hoon KIM, Ji Yun KIM
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Publication number: 20220209153Abstract: A white light emitting device and the light emitting display device including the same have an improved structure capable of preventing a color difference between regions and eliminating a difference in color characteristics between a low grayscale level and a high grayscale level.Type: ApplicationFiled: December 13, 2021Publication date: June 30, 2022Applicant: LG DISPLAY CO., LTD.Inventors: Yong Hwan KIM, Ki Woog SONG
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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: 10985338Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.Type: GrantFiled: September 9, 2020Date of Patent: April 20, 2021Assignee: LG Display Co., Ltd.Inventors: Sung Hoon Pieh, Chang Wook Han, Hong Seok Choi, Ki-Woog Song, So Yeon Ahn, Seung Hyun Kim
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Publication number: 20200411787Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.Type: ApplicationFiled: September 9, 2020Publication date: December 31, 2020Applicant: LG Display Co., Ltd.Inventors: Sung Hoon PIEH, Chang Wook HAN, Hong Seok CHOI, Ki-Woog SONG, So Yeon AHN, Seung Hyun KIM
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Patent number: 10818862Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.Type: GrantFiled: January 29, 2020Date of Patent: October 27, 2020Assignee: LG Display Co., Ltd.Inventors: Sung Hoon Pieh, Chang Wook Han, Hong Seok Choi, Ki-Woog Song, So Yeon Ahn, Seung Hyun Kim
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Publication number: 20200168828Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.Type: ApplicationFiled: January 29, 2020Publication date: May 28, 2020Applicant: LG Display Co., Ltd.Inventors: Sung Hoon PIEH, Chang Wook HAN, Hong Seok CHOI, Ki-Woog SONG, So Yeon AHN, Seung Hyun KIM
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Publication number: 20200106026Abstract: An organic electroluminescence device including an anode, a cathode and a light-emission layer. The light-emission layer includes a stack of a blue light-emission layer and a red/green light concurrent-emission sub-stack. Further, the red/green light concurrent-emission sub-stack includes a stack of a red light-emission layer and a green light-emission layer. The red light-emission layer contains a red host compound including an arylamino group-substituted spirobisfluorene compound. Further, the green light-emission layer contains a green host compound including a mixture between a first green host compound and a second green host compound. Also, the first green host compound includes a bis-carbazole based compound, and the second green host compound includes a carbazole-based compound.Type: ApplicationFiled: September 25, 2019Publication date: April 2, 2020Applicant: LG DISPLAY CO., LTD.Inventors: Hyeseung Kang, Dohan Kim, Jungkeun Kim, Seungryong Joung, Ki-Woog Song, Jungsoo Park, Seongsu Jeon, Taewoo Jeon
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Patent number: 10586939Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.Type: GrantFiled: May 24, 2019Date of Patent: March 10, 2020Assignee: LG Display Co., Ltd.Inventors: Sung Hoon Pieh, Chang Wook Han, Hong Seok Choi, Ki-Woog Song, So Yeon Ahn, Seung Hyun Kim
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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: 10431776Abstract: A white organic light emitting diode (OLED) includes a first electrode and a second electrode facing each other; a first charge generation layer and a second charge generation layer between the first and second electrodes; a first light emitting unit including a first emitting material layer emitting a first color, wherein the first light emitting unit is located between the first electrode and the first charge generation layer; a second light emitting unit including a second emitting material layer emitting a second color, wherein the second light emitting unit is located between the first charge generation layer and the second charge generation layer; and a third light emitting unit including a third emitting material layer emitting the second color, wherein the third light emitting unit is located between the second charge generation layer and the second electrode.Type: GrantFiled: August 29, 2014Date of Patent: October 1, 2019Assignee: LG DISPLAY CO., LTD.Inventors: Ki-Woog Song, Sung-Hoon Pieh, Seung-Ryong Joung, Tae-Il Kum, So-Yeon Ahn, Tae-Shick Kim
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Publication number: 20190288228Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.Type: ApplicationFiled: May 24, 2019Publication date: September 19, 2019Applicant: LG Display Co., Ltd.Inventors: Sung Hoon PIEH, Chang Wook HAN, Hong Seok CHOI, Ki-Woog SONG, So Yeon AHN, Seung Hyun KIM
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Patent number: 10355231Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.Type: GrantFiled: November 29, 2018Date of Patent: July 16, 2019Assignee: LG Display Co., Ltd.Inventors: Sung Hoon Pieh, Chang Wook Han, Hong Seok Choi, Ki-Woog Song, So Yeon Ahn, Seung Hyun Kim
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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: 10270063Abstract: Disclosed is an organic light emitting display device. The organic light emitting display device includes a first emission part between a first electrode and a second electrode, a second emission part on the first emission part, and a first charge generation layer and a second charge generation layer between the first emission part and the second emission part. The first emission part includes a first organic layer, and the second emission part includes a second organic layer. A first thickness includes the first emission part and the first charge generation layer, and a second thickness includes the second emission part and the second charge generation layer. The first thickness is equal to or greater than the second thickness.Type: GrantFiled: August 18, 2017Date of Patent: April 23, 2019Assignee: LG DISPLAY CO., LTD.Inventors: Taeil Kum, Ki-Woog Song, Seung Kim, Jaeseung Jang
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Patent number: 10249849Abstract: An organic light emitting display device includes a first electrode and a second electrode on a substrate, the first electrode being opposite to the second electrode; and at least one emission part between the first electrode and the second electrode, the at least one emission part including at least one organic layer, wherein the at least one organic layer comprises a peak wavelength of electroluminescence (EL) spectrum (PWES) structure where a moving range of a peak wavelength of an EL spectrum emitted from the at least one emission part is set.Type: GrantFiled: December 1, 2017Date of Patent: April 2, 2019Assignee: LG DISPLAY CO., LTD.Inventors: Ki-Woog Song, JeongHaeng Heo, Taeil Kum, Seung Kim, Heedong Choi, HyungJune Kim
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Publication number: 20190097153Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.Type: ApplicationFiled: November 29, 2018Publication date: March 28, 2019Applicant: LG Display Co., Ltd.Inventors: Sung Hoon PIEH, Chang Wook HAN, Hong Seok CHOI, Ki-Woog SONG, So Yeon AHN, Seung Hyun KIM
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Patent number: 10177330Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.Type: GrantFiled: October 2, 2015Date of Patent: January 8, 2019Assignee: LG Display Co., Ltd.Inventors: Sung Hoon Pieh, Chang Wook Han, Hong Seok Choi, Ki-Woog Song, So Yeon Ahn, Seung Hyun 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: 10153451Abstract: An organic light emitting device includes a first emitting part on an anode, the first emitting part including a first emission layer and a first hole transport layer a second emitting part on the first emitting part, the second emitting part including a second emission layer and a second hole transport layer; a third emitting part on the second emitting part including a third emission layer and a third hole transport layer; and a cathode on the third emitting part. The third emitting part further includes a fourth emission layer to emit light having a same color as the third emission layer and includes a dopant and a mixed host of at least two hosts, and a fourth hole transport layer provided on the third hole transport layer while in contact with the third emission layer, and has a hole mobility lower than that of the third hole transport layer.Type: GrantFiled: March 22, 2017Date of Patent: December 11, 2018Assignee: LG Display Co., Ltd.Inventors: Taeshick Kim, Younseok Kam, Ki-Woog Song