Patents by Inventor Younghyun KO
Younghyun KO 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: 20240162239Abstract: Discussed are a display panel and a display device including thin film transistors having high reliability and a high current producing characteristic. In one example, the display panel includes a first active layer disposed on a substrate and including a first channel region, a second active layer overlapping a portion of the first active layer and including a second channel region not overlapping the first channel region of the first active layer, first and second electrodes disposed in respective portions of the first and second active layers, respectively, and spaced apart from each other, a gate insulating layer disposed in respective portions of upper surfaces of the first and second active layers, and a third electrode disposed on the gate insulating layer.Type: ApplicationFiled: October 18, 2023Publication date: May 16, 2024Applicant: LG Display Co., Ltd.Inventors: Dohyung LEE, ChanYong JEONG, JuHeyuck BAECK, Younghyun KO, HongRak CHOI
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Publication number: 20240090276Abstract: A display panel include a data signal line for supplying a data signal; a scan signal line for supplying a scan signal; and a subpixel connected to the data signal line and the scan signal line and including a first transistor including a first active layer, a first source electrode connected to one side of the first active layer, a first drain electrode connected to another side of the first active layer, and a first gate electrode overlapping with the first active layer, overlapping with all or at least a portion of the first source electrode, and overlapping with all or at least a portion of the first drain electrode, and are capable of preventing the exposure of the first transistor to light or hydrogen, and thereby preventing a decrease in characteristics of the first transistor due to light or hydrogen.Type: ApplicationFiled: August 21, 2023Publication date: March 14, 2024Applicant: LG Display Co., Ltd.Inventors: ChanYong JEONG, Younghyun KO, JuHeyuck BAECK
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Patent number: 11888065Abstract: Provided are a thin film transistor army substrate and an electronic device including the same. The thin film transistor army substrate includes a first active layer disposed on a substrate, a first gate insulating film disposed on the first active layer, a first gate electrode disposed on the first gate insulating film to overlap a part of the first active layer, a first insulating film disposed on the first gate electrode, a second active layer disposed on the first insulating film to overlap the first active layer and the first gate electrode, a second gate insulating film disposed on the second active layer, and a second gate electrode disposed on the second gate insulating film to overlap a part of the second active layer. The first gate electrode and the second gate electrode overlap each other, and thus it is possible to reduce an area occupied by transistors.Type: GrantFiled: October 27, 2022Date of Patent: January 30, 2024Assignee: LG Display Co., Ltd.Inventor: Younghyun Ko
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Publication number: 20230337482Abstract: An organic light emitting display device is disclosed that uses a hybrid type thin film transistor. The organic light emitting display device includes a conductive pattern with a higher etch resistance compared to an inorganic thin film in an upper edge of a semiconductor pattern, and is thereby capable of simplifying a manufacturing process of a substrate on which an array of hybrid type thin film transistors each including multiple layers is disposed, and improving the performance of thin film transistors formed on the array substrate. The organic light emitting display device can represent a variety of grayscale images at low grayscales as a driving thin film transistor including an oxide semiconductor pattern is designed to have an increased s-factor value.Type: ApplicationFiled: January 20, 2023Publication date: October 19, 2023Inventors: Min-Gu Kang, SeungChan Choi, Younghyun Ko, Uyhyun Choi, Jaeman Jang
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Publication number: 20230134901Abstract: A thin film transistor and a display device comprising the same is disclosed. The thin film transistor comprises an active layer on a substrate, and a first gate electrode at least partially overlapped with the active layer, wherein the active layer includes a channel portion, a first connection portion that is in contact with one side of the channel portion, and a second connection portion that is in contact with the other side of the channel portion, and an effective gate voltage applied to a first area of the channel portion, which is in contact with the first connection portion, is greater than that applied to a second area of the channel portion, which is in contact with the second connection portion.Type: ApplicationFiled: October 19, 2022Publication date: May 4, 2023Inventors: Younghyun Ko, Jaeman Jang, SeungChan Choi, Min-Gu Kang, Sungju Choi
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Publication number: 20230140193Abstract: A thin film transistor and a display device comprising the same are provided. The thin film transistor includes an active layer, and a gate electrode at least partially overlapped with the active layer. The active layer includes a channel portion, a first connection portion that is in contact with one side of the channel portion, and a second connection portion that is in contact with the other side of the channel portion. The channel portion includes a first area and a second area that is disposed in parallel with the first area, each of the first area and the second area is extended from the first connection portion to the second connection portion. An effective gate voltage applied to the first area is smaller than that applied to the second area.Type: ApplicationFiled: October 31, 2022Publication date: May 4, 2023Inventors: Sungju CHOI, JungSeok SEO, Younghyun KO, Jaeyoon PARK, Seoyeon IM, Jinwon JUNG
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Publication number: 20230127842Abstract: A thin film transistor substrate and a display device including the same are provided. The thin film transistor substrate includes a first thin film transistor and a second thin film transistor on a base substrate, wherein the first thin film transistor includes a first active layer on the base substrate, a first conductive material layer on the first active layer, and a first gate electrode spaced apart from the first active layer and at least partially overlapped with the first active layer, and the second thin film transistor includes a second active layer on the base substrate, a second conductive material layer on the second active layer, and a second gate electrode spaced apart from the second active layer and at least partially overlapped with the second active layer.Type: ApplicationFiled: October 21, 2022Publication date: April 27, 2023Applicant: LG Display Co., Ltd.Inventors: Min-Gu KANG, Younghyun KO, HongRak CHOI
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Patent number: 11636805Abstract: The present specification provides a display device and a driving method thereof performing sampling for sensing a sampling voltage of a driving transistor using a fast mode in which a driving transistor operates by a sampling voltage formed in one storage capacitor, and data writing using the slow mode in which the driving transistor is operated by a data voltage formed in another storage capacitor.Type: GrantFiled: September 8, 2021Date of Patent: April 25, 2023Assignee: LG Display Co., Ltd.Inventors: YongHo Jang, Younghyun Ko
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Publication number: 20230111218Abstract: A thin film transistor and a display device comprising the same are provided. The thin film transistor comprises an active layer, and a gate electrode at least partially overlapped with the active layer, wherein the active layer includes a channel portion overlapped with the gate electrode, a first connection portion that is in contact with one side of the channel portion, and a second connection portion that is in contact with the other side of the channel portion, the channel portion includes a first channel area and a second channel area, each of the first channel area and the second channel area is extended from the first connection portion to the second connection portion, and a length of the first channel area is shorter than that of the second channel area.Type: ApplicationFiled: October 10, 2022Publication date: April 13, 2023Inventors: Min-Gu KANG, Younghyun KO, SeungChan CHOI, Jaeman JANG
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Publication number: 20230061581Abstract: Provided are a thin film transistor army substrate and an electronic device including the same. The thin film transistor army substrate includes a first active layer disposed on a substrate, a first gate insulating film disposed on the first active layer, a first gate electrode disposed on the first gate insulating film to overlap a part of the first active layer, a first insulating film disposed on the first gate electrode, a second active layer disposed on the first insulating film to overlap the first active layer and the first gate electrode, a second gate insulating film disposed on the second active layer, and a second gate electrode disposed on the second gate insulating film to overlap a part of the second active layer. The first gate electrode and the second gate electrode overlap each other, and thus it is possible to reduce an area occupied by transistors.Type: ApplicationFiled: October 27, 2022Publication date: March 2, 2023Inventor: Younghyun KO
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Publication number: 20220399464Abstract: A thin film transistor substrate is provided, which comprises a substrate, a first thin film transistor on the substrate, and a second thin film transistor on the substrate, wherein the first thin film transistor includes a first active layer having a first channel portion, a first gate insulating layer on the first active layer, a first gate electrode on the first gate insulating layer, a first source electrode connected to the first active layer, and a first drain electrode spaced apart from the first source electrode and connected to the first active layer, the second thin film transistor includes a conductive material layer on the substrate, a first buffer layer on the conductive material layer, a second active layer having a second channel portion on the first buffer layer, a second gate insulating layer on the second active layer, a second gate electrode on the second gate insulating layer, a second source electrode connected to the second active layer, and a second drain electrode spaced apart from theType: ApplicationFiled: May 24, 2022Publication date: December 15, 2022Applicant: LG DISPLAY CO., LTD.Inventors: Younghyun KO, SeungChan CHOI, Min-Gu KANG, Jaeman JANG
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Patent number: 11515425Abstract: Provided are a thin film transistor array substrate and an electronic device including the same. The thin film transistor array substrate includes a first active layer disposed on a substrate, a first gate insulating film disposed on the first active layer, a first gate electrode disposed on the first gate insulating film to overlap a part of the first active layer, a first insulating film disposed on the first gate electrode, a second active layer disposed on the first insulating film to overlap the first active layer and the first gate electrode, a second gate insulating film disposed on the second active layer, and a second gate electrode disposed on the second gate insulating film to overlap a part of the second active layer. The first gate electrode and the second gate electrode overlap each other, and thus it is possible to reduce an area occupied by transistors.Type: GrantFiled: December 8, 2020Date of Patent: November 29, 2022Assignee: LG Display Co., Ltd.Inventor: Younghyun Ko
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Patent number: 11514858Abstract: A display device and a driving method for a display device are provided. The display device uses a second storage capacitor and stably moves the threshold voltage of the driving transistor to a positive value in a diode-connected driving circuit. Accordingly, a compensation performance of a threshold voltage of a driving transistor may be improved.Type: GrantFiled: August 17, 2021Date of Patent: November 29, 2022Assignee: LG Display Co., Ltd.Inventors: Min-Gu Kang, SeungChan Choi, Younghyun Ko
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Publication number: 20220208094Abstract: The present specification provides a display device and a driving method thereof performing sampling for sensing a sampling voltage of a driving transistor using a fast mode in which a driving transistor operates by a sampling voltage formed in one storage capacitor, and data writing using the slow mode in which the driving transistor is operated by a data voltage formed in another storage capacitor.Type: ApplicationFiled: September 8, 2021Publication date: June 30, 2022Inventors: YongHo JANG, Younghyun KO
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Publication number: 20220189403Abstract: A display device and a driving method for a display device are provided. The display device uses a second storage capacitor and stably moves the threshold voltage of the driving transistor to a positive value in a diode-connected driving circuit. Accordingly, a compensation performance of a threshold voltage of a driving transistor may be improved.Type: ApplicationFiled: August 17, 2021Publication date: June 16, 2022Applicant: LG DISPLAY CO., LTD.Inventors: Min-Gu KANG, SeungChan CHOI, Younghyun KO
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Publication number: 20220130944Abstract: A thin film transistor array substrate comprises a panel including the thin film transistor array substrate, and an electronic device including the panel that includes a conductive auxiliary layer disposed on the substrate, a gate electrode and first and second electrodes that are disposed on the conductive auxiliary layer and spaced apart from one another, a gate insulating film disposed on the gate electrode, and an active layer disposed on or over the gate insulating film and the first and second electrodes, and including a first region, a second region spaced apart from the first region, a first auxiliary region surrounding the first region, and a second auxiliary region surrounding the second region, where an electrical resistance of each of the first auxiliary region and the second auxiliary region is lower than that of the channel region and higher than that of each of the first and second regions.Type: ApplicationFiled: July 28, 2021Publication date: April 28, 2022Applicant: LG DISPLAY CO., LTD.Inventors: Younghyun KO, ChanYong JEONG
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Publication number: 20210399142Abstract: Embodiments of the present disclosure relate to a thin film transistor array substrate and display device in which a semiconductor layer has a heterogeneous conductorization structure including heterogeneous conductorization portions having different electrical conductivity, and the gate insulator layer is not etched enough to expose the semiconductor layer between the source electrode part and the gate electrode part and between the drain electrode part and the gate electrode part, so that the possibility of damage to the semiconductor layer can be eliminated or reduced.Type: ApplicationFiled: June 7, 2021Publication date: December 23, 2021Inventors: ChanYong Jeong, JuHeyuck Baeck, Dohyung Lee, Younghyun Ko
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Publication number: 20210193838Abstract: Provided are a thin film transistor array substrate and an electronic device including the same. The thin film transistor array substrate includes a first active layer disposed on a substrate, a first gate insulating film disposed on the first active layer, a first gate electrode disposed on the first gate insulating film to overlap a part of the first active layer, a first insulating film disposed on the first gate electrode, a second active layer disposed on the first insulating film to overlap the first active layer and the first gate electrode, a second gate insulating film disposed on the second active layer, and a second gate electrode disposed on the second gate insulating film to overlap a part of the second active layer. The first gate electrode and the second gate electrode overlap each other, and thus it is possible to reduce an area occupied by transistors.Type: ApplicationFiled: December 8, 2020Publication date: June 24, 2021Inventor: Younghyun KO
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Patent number: 10811484Abstract: An organic light emitting display panel and an organic light emitting display apparatus using the same are disclosed, in which a switching transistor and a driving transistor are provided on their respective layers different from each other. To this end, the organic light emitting display panel comprises a substrate partitioned by a plurality of pixels, a driving transistor provided in a first pixel of the pixels and provided on the substrate in a top gate type, a first insulating film for covering the driving transistor, a switching transistor provided on the first insulating film in a top gate type, a second insulating film for covering the first insulating film and the switching transistor, a planarization film provided on the second insulating film, and an organic light emitting diode provided on the planarization film and connected with a driving first conductor of the driving transistor.Type: GrantFiled: December 11, 2018Date of Patent: October 20, 2020Assignee: LG DISPLAY CO., LTD.Inventors: DaeHwan Kim, Younghyun Ko
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Publication number: 20190206971Abstract: An organic light emitting display panel and an organic light emitting display apparatus using the same are disclosed, in which a switching transistor and a driving transistor are provided on their respective layers different from each other. To this end, the organic light emitting display panel comprises a substrate partitioned by a plurality of pixels, a driving transistor provided in a first pixel of the pixels and provided on the substrate in a top gate type, a first insulating film for covering the driving transistor, a switching transistor provided on the first insulating film in a top gate type, a second insulating film for covering the first insulating film and the switching transistor, a planarization film provided on the second insulating film, and an organic light emitting diode provided on the planarization film and connected with a driving first conductor of the driving transistor.Type: ApplicationFiled: December 11, 2018Publication date: July 4, 2019Inventors: DaeHwan KIM, Younghyun KO