Patents by Inventor JEHONG OH
JEHONG OH 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: 20240006554Abstract: A light-emitting device may include a plurality of light-emitting rods. Each of the plurality of light-emitting rods may include a first semiconductor layer having a rod shape, an active layer having a shell shape disposed about a plurality of surfaces of the first semiconductor layer, and a second semiconductor layer having a shell shape disposed about a plurality of surfaces of the active layer. The light emitting device may further include an insulating layer disposed in spaces between the plurality of light-emitting rods; a transparent electrode electrically connected to the first semiconductor layer of each of the plurality of light-emitting rods; and a reflective electrode electrically connected to the second semiconductor layer of each of the plurality of light-emitting rods.Type: ApplicationFiled: June 28, 2023Publication date: January 4, 2024Applicants: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Dongho KIM, Ho Won JANG, Kyungwook HWANG, Junsik HWANG, Sohyeon PARK, Jehong OH, Jungel RYU
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Publication number: 20230420604Abstract: Provided are a method of manufacturing a micro-LED and a method of manufacturing a display apparatus to which the method is applied. In the method of manufacturing a micro-LED, a membrane formed to include a cavity is formed on a substrate, and then, a sacrificial layer that may be selectively removed by wet etching is formed on the membrane. Next, a light-emitting device is formed on the sacrificial layer, and the light-emitting device is separated from the membrane by the wet etching. In an example, an undoped semiconductor layer may further be formed between the membrane and the sacrificial layer. The sacrificial layer may include an oxide layer having the same crystal lattice structure as that of the undoped semiconductor layer. In an example, another undoped semiconductor layer may further be formed between the sacrificial layer and the light-emitting device.Type: ApplicationFiled: June 27, 2023Publication date: December 28, 2023Applicants: Samsung Electronics Co., Ltd., Seoul National University R&DB FoundationInventors: Dongho KIM, Howon Jang, Jehong OH, Kyungwook Hwang, Junsik Hwang
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Publication number: 20230299234Abstract: Disclosed are a display device and a manufacturing method thereof. The display device includes a plurality of pixels, a light emitting device provided in each of the plurality of pixels, the light emitting device having a first surface and a second surface, which are opposite to each other, a first electrode electrically connected to the first surface of the light emitting device, a second electrode electrically connected to the second surface of the light emitting device, and a metal oxide pattern interposed between the second surface of the light emitting device and the second electrode. The metal oxide pattern is provided to cover a portion of the second surface and to expose a remaining portion of the second surface. The second electrode is electrically connected to the exposed remaining portion of the second surface, and the metal oxide pattern includes single-crystalline or polycrystalline alumina.Type: ApplicationFiled: April 19, 2023Publication date: September 21, 2023Applicant: SAMSUNG ELECTRONICS CO.,LTD.Inventors: Euijoon YOON, Jehong OH, Jungel RYU, Seungmin LEE, Jongmyeong KIM
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Patent number: 11705537Abstract: Disclosed are a display device and a manufacturing method thereof. The display device includes a plurality of pixels, a light emitting device provided in each of the plurality of pixels, the light emitting device having a first surface and a second surface, which are opposite to each other, a first electrode electrically connected to the first surface of the light emitting device, a second electrode electrically connected to the second surface of the light emitting device, and a metal oxide pattern interposed between the second surface of the light emitting device and the second electrode. The metal oxide pattern is provided to cover a portion of the second surface and to expose a remaining portion of the second surface. The second electrode is electrically connected to the exposed remaining portion of the second surface, and the metal oxide pattern includes single-crystalline or polycrystalline alumina.Type: GrantFiled: April 22, 2021Date of Patent: July 18, 2023Assignee: SAMSUNG ELECTRONICS CO.,. LTD.Inventors: Euijoon Yoon, Jehong Oh, Jungel Ryu, Seungmin Lee, Jongmyeong Kim
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Publication number: 20220416123Abstract: Provided are a light-emitting diode (LED) device, a method of manufacturing the LED device, and a display apparatus including the LED device. The LED device includes a light-emitting layer having a core-shell structure, a passivation layer provided to cover a portion of a top surface of the first semiconductor layer, a first electrode provided on the light-emitting layer, and a second electrode provided under the light-emitting layer. The light-emitting layer includes a first semiconductor layer, an active layer, and a second semiconductor layer. The first electrode is provided to contact the first semiconductor layer, and the second electrode is provided to contact the second semiconductor layer.Type: ApplicationFiled: August 29, 2022Publication date: December 29, 2022Applicants: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Kyungwook HWANG, Sungjin KANG, Euijoon YOON, Junsik HWANG, Jongmyeong KIM, Jehong OH, Jungel RYU, Seungmin LEE
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Publication number: 20220216368Abstract: Provided are a semiconductor structure and a method of manufacturing the same. The semiconductor structure includes a substrate, a membrane bridge that defines, with the substrate, a plurality of cavities, and a nitride semiconductor layer arranged on the membrane bridge. The membrane bridge and the substrate have the same crystal structure. The membrane bridge has an upper surface with a constant height with respect to a surface of the substrate.Type: ApplicationFiled: November 16, 2021Publication date: July 7, 2022Applicants: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Kyungwook HWANG, Ho Won JANG, Junsik HWANG, Jehong OH, Jungel RYU, Seungmin LEE
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Patent number: 11329187Abstract: A method of aligning micro LEDs and a method of manufacturing a micro LED display using the same are provided. The method of aligning micro LEDs includes providing micro LEDs, each having a first surface that has a first maximum width and a second surface opposite to the first surface and has a second maximum width that is greater than the first maximum width, providing a transfer substrate including a transfer mold that has an array of openings, each of the openings being configured to accommodate the first surface of a corresponding micro LED and not accommodate the second surface of the corresponding micro LED and aligning the micro LEDs in one direction in the openings of the transfer mold by inserting the micro LEDs into the openings of the transfer mold so that the first surface of each of the micro LEDs is positioned within a corresponding opening.Type: GrantFiled: May 26, 2020Date of Patent: May 10, 2022Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Kyungwook Hwang, Jungel Ryu, Sungjin Kang, Jongmyeong Kim, Jehong Oh, Euijoon Yoon, Seungmin Lee, Junsik Hwang
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Patent number: 11251337Abstract: The present disclosure relates to a display device, and more particularly, to a display device including a plurality of pixels on a base layer and a first light-emitting element and a second light-emitting element, which are provided on a first pixel of the pixels. Here, each of the first and second light-emitting elements includes a first surface and a second surface opposite to the first surface, the first surface of the first light-emitting element faces the base layer, and the second surface of the second light-emitting element faces the base layer.Type: GrantFiled: November 12, 2019Date of Patent: February 15, 2022Inventors: Euijoon Yoon, Jehong Oh, Jung El Ryu, Seungmin Lee, Jongmyeong Kim
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Publication number: 20210336084Abstract: A display device with improved light-emitting efficiency is disclosed. The display device includes a plurality of pixels, a light emitting device provided in each of the pixels, the light emitting device having first and second surfaces which are opposite to each other, first and second electrodes electrically and respectively connected to the first and second surfaces of the light emitting device, and a metal oxide pattern interposed between the second surface of the light emitting device and the second electrode. The metal oxide pattern includes first and second regions. The first region encloses the second region, and the second region has a contact hole exposing at least a portion of the second surface. The second electrode is coupled to the second surface through the contact hole, and the first and second regions have crystalline phases different from each other.Type: ApplicationFiled: April 22, 2021Publication date: October 28, 2021Inventors: Euijoon YOON, Jongmyeong KIM, Jehong OH, Seungmin LEE, Jungel RYU
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Publication number: 20210335766Abstract: Disclosed are a display device and a method of manufacturing the same. The display device includes a plurality of pixels on a base layer and a plurality of light emitting devices provided on a first pixel, which is one of the pixels. The light emitting devices include at least one active light emitting device and at least one dummy light emitting device. Each of the active and dummy light emitting devices includes a first surface and a second surface, which are opposite to each other, and a metal oxide pattern on the second surface. The first surface of the active light emitting device faces the base layer, and the second surface of the dummy light emitting device faces the base layer.Type: ApplicationFiled: April 22, 2021Publication date: October 28, 2021Inventors: Euijoon YOON, Jehong OH, Seungmin LEE, Jongmyeong KIM, Jungel RYU
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Publication number: 20210336085Abstract: Disclosed are a display device and a manufacturing method thereof. The display device includes a plurality of pixels, a light emitting device provided in each of the plurality of pixels, the light emitting device having a first surface and a second surface, which are opposite to each other, a first electrode electrically connected to the first surface of the light emitting device, a second electrode electrically connected to the second surface of the light emitting device, and a metal oxide pattern interposed between the second surface of the light emitting device and the second electrode. The metal oxide pattern is provided to cover a portion of the second surface and to expose a remaining portion of the second surface. The second electrode is electrically connected to the exposed remaining portion of the second surface, and the metal oxide pattern includes single-crystalline or polycrystalline alumina.Type: ApplicationFiled: April 22, 2021Publication date: October 28, 2021Inventors: Euijoon YOON, Jehong OH, Jungel RYU, Seungmin LEE, Jongmyeong KIM
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Publication number: 20210184070Abstract: A method of aligning micro LEDs and a method of manufacturing a micro LED display using the same are provided. The method of aligning micro LEDs includes providing micro LEDs, each having a first surface that has a first maximum width and a second surface opposite to the first surface and has a second maximum width that is greater than the first maximum width, providing a transfer substrate including a transfer mold that has an array of openings, each of the openings being configured to accommodate the first surface of a corresponding micro LED and not accommodate the second surface of the corresponding micro LED and aligning the micro LEDs in one direction in the openings of the transfer mold by inserting the micro LEDs into the openings of the transfer mold so that the first surface of each of the micro LEDs is positioned within a corresponding opening.Type: ApplicationFiled: May 26, 2020Publication date: June 17, 2021Applicants: SAMSUNG ELECTRONICS CO., LTD, SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Kyungwook HWANG, Jungel RYU, Sungjin KANG, Jongmyeong KIM, Jehong OH, Euijoon YOON, Seungmin LEE, Junsik HWANG
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Publication number: 20210159361Abstract: Provided are a light-emitting diode (LED) device, a method of manufacturing the LED device, and a display apparatus including the LED device. The LED device includes a light-emitting layer having a core-shell structure, a passivation layer provided to cover a portion of a top surface of the first semiconductor layer, a first electrode provided on the light-emitting layer, and a second electrode provided under the light-emitting layer. The light-emitting layer includes a first semiconductor layer, an active layer, and a second semiconductor layer. The first electrode is provided to contact the first semiconductor layer, and the second electrode is provided to contact the second semiconductor layer.Type: ApplicationFiled: April 10, 2020Publication date: May 27, 2021Applicants: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Kyungwook HWANG, Sungjin KANG, Euijoon YOON, Junsik HWANG, Jongmyeong KIM, Jehong OH, Jungel RYU, Seungmin LEE
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Publication number: 20200152832Abstract: The present disclosure relates to a display device, and more particularly, to a display device including a plurality of pixels on a base layer and a first light-emitting element and a second light-emitting element, which are provided on a first pixel of the pixels. Here, each of the first and second light-emitting elements includes a first surface and a second surface opposite to the first surface, the first surface of the first light-emitting element faces the base layer, and the second surface of the second light-emitting element faces the base layer.Type: ApplicationFiled: November 12, 2019Publication date: May 14, 2020Inventors: Euijoon YOON, JEHONG OH, JUNG EL RYU, SEUNGMIN LEE, JONGMYEONG KIM