Patents by Inventor Jae Gwang Um
Jae Gwang Um 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: 20250248176Abstract: A light emitting element includes a bonding electrode, and a light emitting stack including a first semiconductor layer, an active layer, and a second semiconductor layer sequentially disposed each other on the bonding electrode. At least one protrusion structure is defined on an upper surface of the light emitting stack, and the protrusion structure includes a first protrusion protruding in a direction away from the bonding electrode and defining a groove concave in a direction facing the bonding electrode, and a second protrusion protruding in a direction away from the bonding electrode in the groove of the first protrusion.Type: ApplicationFiled: August 14, 2024Publication date: July 31, 2025Applicant: Samsung Display Co., LTD.Inventors: Tae Hee LEE, Byoung Yong KIM, Jae Gwang UM, Moon Won CHANG
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Publication number: 20250218848Abstract: In a method of manufacturing a display device, the method includes aligning a metal layer of a transfer substrate and a display substrate to face each other, attaching a light emitting element including a metal protrusion portion bonded to the metal layer to an overcoat layer of the display substrate by moving the transfer substrate relative to the display substrate, and separating the metal protrusion portion from the light emitting element by moving the transfer substrate relative to the display substrate.Type: ApplicationFiled: July 1, 2024Publication date: July 3, 2025Applicant: Samsung Display Co., LTD.Inventors: Jae Gwang UM, Tae Hee LEE, Moon Won CHANG
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Publication number: 20250209955Abstract: A display device includes a display panel including a pixel, a data driver providing a data voltage to the pixel, a gate driver providing a gate signal to the pixel, and a controller controlling the data driver and the gate driver. The pixel includes a first sub-pixel including a first light emitting element, and a second sub-pixel including multiple second light emitting elements.Type: ApplicationFiled: July 18, 2024Publication date: June 26, 2025Applicant: Samsung Display Co., LTD.Inventor: Jae Gwang UM
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METHOD OF BONDING LIGHT EMITTING ELEMENT AND METHOD OF MANUFACTURING DISPLAY DEVICE, HAVING THE SAME
Publication number: 20250210584Abstract: In a method of manufacturing a display device, the method includes forming a first electrode on a substrate, forming an insulating layer over the first electrode, aligning a first light emitting element on the insulating layer, light-exposing the insulating layer, exposing at least a portion of the first electrode by developing the insulating layer, and bonding the first light emitting element to the at least a portion of the first electrode.Type: ApplicationFiled: October 22, 2024Publication date: June 26, 2025Applicant: Samsung Display Co., LTD.Inventors: Jae Gwang UM, Byoung Yong KIM, Tae Hee LEE, Moon Won CHANG -
Publication number: 20240120230Abstract: An apparatus for fabricating a display panel and a fabricating method of a display panel are provided. An apparatus for fabricating a display panel includes a loading module of a large-area fabricating substrate fabricated and separated into a plurality of display panels, a solvent application module configured to apply a metal bonding solvent onto the large-area fabricating substrate, and an element transfer module configured to transfer a plurality of light emitting elements or at least one integrated circuit onto the large-area fabricating substrate on which the metal bonding solvent is applied, and the loading module includes a groove type discharge path through which the metal bonding solvent applied by the solvent application module flows and is discharged.Type: ApplicationFiled: July 24, 2023Publication date: April 11, 2024Inventors: Tae Hee LEE, Min Woo KIM, Sung Kook PARK, Jae Gwang UM
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Publication number: 20240120323Abstract: The present disclosure relates to an apparatus for fabricating a display panel including: an attachment member having a fixing portion in a pressurization direction to which a pressurization header is fixed, an attachment driving member configured to move the attachment member and the pressurization header in the pressurization direction or a detachment direction through a fixing frame of the attachment member, a first pressure sensing module between the pressurization header and the attachment member and configured to generate first pressure detection signals according to pressure applied to the pressurization header, a gradient setting module configured to set a gradient of the pressurization header based on magnitudes of the first pressure detection signals, and a gradient control module configured to adjust gradients of the pressurization header, the attachment member, and the fixing frame according to control of the gradient setting module.Type: ApplicationFiled: September 6, 2023Publication date: April 11, 2024Inventors: Tae Hee LEE, Sung Kook PARK, Kyung Ho KIM, Young Seok SEO, Jae Gwang UM, Sang Hyun LEE, Hyung Suk HWANG
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Publication number: 20230411577Abstract: The display device includes a substrate, a thin-film transistor on the substrate and including a first electrode, a second electrode and a semiconductor layer, a first insulating layer on the thin-film transistor, an organic layer on the first insulating layer, at least one light-emitting element on the organic layer, a pixel electrode on the organic layer and in contact with a side surface of the at least one light-emitting element, a planarization layer on the side surface of the at least one light-emitting element and a common electrode on the at least one light-emitting element and the planarization layer.Type: ApplicationFiled: February 24, 2023Publication date: December 21, 2023Inventors: Ju Won YOON, Jung Hun NOH, Ki Seong SEO, Jae Gwang UM, So Yeon YOON, Sang Hyun LEE, Hyung Il JEON
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Patent number: 10804337Abstract: Disclosed is an in-cell type organic electroluminescent device. The in-cell type organic electroluminescent device according to an embodiment of the present disclosure includes at least one OLED-driving Thin-Film Transistor (OLED driving TFT) that is formed on a substrate and drives an organic light emitting device (OLED); the OLED connected to the at least one OLED driving TFT through a first contact hole; at least one touch-sensing thin-film transistor (though sensing TFT) that is simultaneously formed with the at least one OLED driving TFT on the substrate and senses touch; and an touch electrode that is connected to the at least one touch sensing TFT through a second contact hole and does not overlap with the OLED, wherein the at least one OLED driving TFT and the at least one touch sensing TFT share a gate line.Type: GrantFiled: November 21, 2017Date of Patent: October 13, 2020Assignee: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITYInventors: Jin Jang, Yuanfeng Chen, Jae Gwang Um
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Patent number: 10396110Abstract: A digital radiographic detector uses an IGZO active layer in the switching element for each imaging pixel in a two-dimensional array of imaging pixels. Each imaging pixel has a photo-sensitive element and the switching element. Read-out circuits electrically connected to the two-dimensional array generate a radiographic image by reading out image data by switching on and off the switching elements. The IGZO active layer may be formed having a thickness less than about 7 nm.Type: GrantFiled: October 10, 2018Date of Patent: August 27, 2019Assignees: Carestream Health, Inc., Kyung Hee UniversityInventors: Ravi K. Mruthyunjaya, Timothy J. Tredwell, Jin Jang, Mallory Mativenga, Jae Gwang Um, Mohammad Masum Billah
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Patent number: 10305051Abstract: Provided are a flexible display device and a method of manufacturing the same. More particularly, the method of manufacturing the flexible display device according to the present invention includes a step of forming a first polyimide-based layer by coating a polyimide-based solution on a carrier substrate; a step of forming an oxide thin film transistor array on the first polyimide-based layer; a step of forming a second polyimide-based layer by coating a polyimide-based solution on the oxide thin film transistor array; a step of forming an organic light emitting diode on the second polyimide-based layer; and a step of removing the carrier substrate, wherein, in the step of forming the oxide thin film transistor array, the oxide thin film transistor array is disposed between the first polyimide-based layer and the second polyimide-based layer.Type: GrantFiled: November 29, 2016Date of Patent: May 28, 2019Assignee: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITYInventors: Jin Jang, Jae Gwang Um
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Publication number: 20190074308Abstract: A digital radiographic detector uses an IGZO active layer in the switching element for each imaging pixel in a two-dimensional array of imaging pixels. Each imaging pixel has a photo-sensitive element and the switching element. Read-out circuits electrically connected to the two-dimensional array generate a radiographic image by reading out image data by switching on and off the switching elements. The IGZO active layer may be formed having a thickness less than about 7 nm.Type: ApplicationFiled: October 10, 2018Publication date: March 7, 2019Inventors: Ravi K. MRUTHYUNJAYA, Timothy J. TREDWELL, Jin JANG, Mallory MATIVENGA, Jae Gwang UM, Mohammad Masum BILLAH
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Publication number: 20190043927Abstract: Disclosed is an in-cell type organic electroluminescent device. The in-cell type organic electroluminescent device according to an embodiment of the present disclosure includes at least one OLED-driving Thin-Film Transistor (OLED driving TFT) that is formed on a substrate and drives an organic light emitting device (OLED); the OLED connected to the at least one OLED driving TFT through a first contact hole; at least one touch-sensing thin-film transistor (though sensing TFT) that is simultaneously formed with the at least one OLED driving TFT on the substrate and senses touch; and an touch electrode that is connected to the at least one touch sensing TFT through a second contact hole and does not overlap with the OLED, wherein the at least one OLED driving TFT and the at least one touch sensing TFT share a gate line.Type: ApplicationFiled: November 21, 2017Publication date: February 7, 2019Applicant: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITYInventors: Jin JANG, Yuanfeng CHEN, Jae Gwang UM
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Publication number: 20180375042Abstract: Provided are a flexible display device and a method of manufacturing the same. More particularly, the method of manufacturing the flexible display device according to the present invention includes a step of forming a first polyimide-based layer by coating a polyimide-based solution on a carrier substrate; a step of forming an oxide thin film transistor array on the first polyimide-based layer; a step of forming a second polyimide-based layer by coating a polyimide-based solution on the oxide thin film transistor array; a step of forming an organic light emitting diode on the second polyimide-based layer; and a step of removing the carrier substrate, wherein, in the step of forming the oxide thin film transistor array, the oxide thin film transistor array is disposed between the first polyimide-based layer and the second polyimide-based layer.Type: ApplicationFiled: November 29, 2016Publication date: December 27, 2018Applicant: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITYInventors: Jin JANG, Jae Gwang UM
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Patent number: 10147749Abstract: A digital radiographic detector uses an IGZO active layer in the switching element for each imaging pixel in a two-dimensional array of imaging pixels. Each imaging pixel has a photo-sensitive element and the switching element. Read-out circuits electrically connected to the two-dimensional array generate a radiographic image by reading out image data by switching on and off the switching elements. The IGZO active layer may be formed having a thickness less than about 7 nm.Type: GrantFiled: April 12, 2016Date of Patent: December 4, 2018Inventors: Ravi K. Mruthyunjaya, Timothy J. Tredwell, Jin Jang, Mallory Mativenga, Jae Gwang Um, Mohammad Masum Billah
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Publication number: 20180138219Abstract: A digital radiographic detector uses an IGZO active layer in the switching element for each imaging pixel in a two-dimensional array of imaging pixels. Each imaging pixel has a photo-sensitive element and the switching element. Read-out circuits electrically connected to the two-dimensional array generate a radiographic image by reading out image data by switching on and off the switching elements. The IGZO active layer may be formed having a thickness less than about 7 nm.Type: ApplicationFiled: April 12, 2016Publication date: May 17, 2018Inventors: Ravi K. Mruthyunjaya, Timothy J. Tredwell, Jin Jang, Mallory Mativenga, Jae Gwang Um, Mohammad Masum Billah
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Patent number: 9825058Abstract: An oxide semiconductor transistor used in a pixel element of a display device and a method of manufacturing the same are disclosed. The oxide semiconductor transistor used in a pixel element of a display device comprises a substrate, a first gate electrode located on the substrate, a source electrode and a drain electrode located on the first gate electrode and a second gate electrode located on the source electrode and the drain electrode. Here, the first gate electrode is electrically connected to the second gate electrode, the same voltage is applied to the first gate electrode and the second gate electrode, and a width of the second gate electrode is shorter than a length between the source electrode and the drain electrode.Type: GrantFiled: December 10, 2015Date of Patent: November 21, 2017Assignee: University-Industry Cooperation Group of Kyung Hee UniversityInventors: Jin Jang, Man Ju Seok, Jae Gwang Um, Su Hui Lee
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Publication number: 20160093643Abstract: An oxide semiconductor transistor used in a pixel element of a display device and a method of manufacturing the same are disclosed. The oxide semiconductor transistor used in a pixel element of a display device comprises a substrate, a first gate electrode located on the substrate, a source electrode and a drain electrode located on the first gate electrode and a second gate electrode located on the source electrode and the drain electrode. Here, the first gate electrode is electrically connected to the second gate electrode, the same voltage is applied to the first gate electrode and the second gate electrode, and a width of the second gate electrode is shorter than a length between the source electrode and the drain electrode.Type: ApplicationFiled: December 10, 2015Publication date: March 31, 2016Inventors: Jin Jang, Man Ju Seok, Jae Gwang Um, Su Hui Lee