Patents by Inventor Tomohiko NAGANUMA
Tomohiko NAGANUMA 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: 20240147777Abstract: A display device includes: a substrate; first banks each having a protruding shape, provided on the substrate, and including a flat portion and an inclined portion; light-emitting elements including pixel electrodes, a light-emitting layer, and counter electrodes stacked on the first banks in the order as listed; a sealing film; color filters; and a light-blocking layer. Each pixel electrode includes a pixel electrode flat portion provided on the flat portion of the first bank and a pixel electrode inclined portion on the inclined portion of the first bank. Each counter electrode is made of a transflective metal film and includes a counter electrode flat portion provided along the pixel electrode flat portion in an area overlapping the flat portion of the first bank and a counter electrode inclined portion provided along the pixel electrode inclined portion in an area overlapping the inclined portion of the first bank.Type: ApplicationFiled: October 27, 2023Publication date: May 2, 2024Applicant: Japan Display Inc.Inventor: Tomohiko NAGANUMA
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Publication number: 20230371350Abstract: Disclosed is a display device including a plurality of pixels, a first inorganic film, a light-shielding film, a resin film, and a second inorganic film. The plurality of pixels each has a light-emitting element including a pixel electrode, an electroluminescence layer over the pixel electrode, and a counter electrode over the electroluminescence layer. The first inorganic film is located over the counter electrode. The light-shielding film is located over the first inorganic film and has a plurality of openings overlapping the pixel electrodes of the plurality of pixels. The resin film is located over the light-shielding film and the first inorganic film and is in contact with the first inorganic film. The second inorganic film is located over the resin film.Type: ApplicationFiled: April 24, 2023Publication date: November 16, 2023Applicant: Japan Display Inc.Inventor: Tomohiko NAGANUMA
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Publication number: 20230240091Abstract: A display device includes a first pixel electrode, a second pixel electrode spaced apart from the first pixel electrode in a first direction, a first common layer on each of the first and second pixel electrodes, a second common layer on the first common layer, a first light-emitting layer on the first pixel electrode via the first and the second common layers, a second light-emitting layer on the second pixel electrode via the first and the second common layers, and a counter electrode on the first and second light-emitting layers, wherein the first common layer has a first region overlapping the first pixel electrode, a second region between the first and second pixel electrodes, and a third region overlapping the second pixel electrode, the second region is separated from each of the first and third regions, and the second common layer continuously covers the first, second, and third regions.Type: ApplicationFiled: January 13, 2023Publication date: July 27, 2023Applicant: Japan Display Inc.Inventor: Tomohiko NAGANUMA
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Publication number: 20230146754Abstract: According to one embodiment, a display device includes a pixel electrode provided in each of a plurality of pixels, a bank provided between the adjacent pixel electrodes, an organic EL layer provided on the pixel electrode and provided in an opening of the bank, a common electrode provided over the first to third pixels, and an auxiliary electrode provided in at least one of the first to third pixels so as to overlap the common electrode and the organic EL layer.Type: ApplicationFiled: November 2, 2022Publication date: May 11, 2023Applicant: Japan Display Inc.Inventor: Tomohiko NAGANUMA
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Patent number: 11515384Abstract: A display device includes a display region including a plurality of first regions, and a plurality of second regions arranged with a certain gap between the plurality of first regions, wherein each of the plurality of first regions includes a transistor, a first organic layer, a wiring, a first organic insulating layer on the wiring and the transistor, a display element on the first organic insulating layer, a first sealing layer on the display element and stacked in order with a first inorganic insulating layer, a second organic insulating layer and a second inorganic insulating layer, each of the plurality of second regions includes the wiring, a second organic layer on the wiring, a second sealing layer stacked in order with the first inorganic insulating layer and the second inorganic insulating layer, and a thickness of the second organic layer is smaller than the thickness of the first organic layer.Type: GrantFiled: January 8, 2021Date of Patent: November 29, 2022Assignee: Japan Display Inc.Inventor: Tomohiko Naganuma
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Patent number: 11366542Abstract: First electrodes are formed on an insulation surface in such a manner that the adjacent first electrodes are connected in a first direction and are separated in a second direction intersecting the first direction. Second electrodes are formed on an insulation surface in such a manner that the adjacent second electrodes are connected in the second direction and are separated in the first direction. Third electrodes are formed in regions in which the third electrodes overlap with the first electrodes and do not overlap with the second electrodes in such a manner that the adjacent third electrodes are connected in the second direction and are separated in the first direction. A flexible insulation layer is formed between the first electrodes and the third electrodes. An area of each of the third electrodes is less than an area of each of the first electrodes.Type: GrantFiled: January 6, 2021Date of Patent: June 21, 2022Assignee: Japan Display Inc.Inventors: Tomohiko Naganuma, Mitsuhide Miyamoto, Chunche Ma
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Patent number: 11054955Abstract: A display device includes a display region including a plurality of pixels and a separation region between each of the plurality of pixels and a touch sensor overlapping the display region. The touch sensor includes a sensor electrode and an insulating layer. The sensor electrode includes a first sensor electrode pattern overlapping at least one of the plurality of pixels and a second sensor electrode pattern overlapping at least a part of the separation region. The insulating layer is arranged between the first sensor electrode pattern and the second sensor electrode pattern, and overlaps the first sensor electrode pattern, and covers a first region of the first sensor electrode pattern. The second sensor electrode pattern is arranged on the insulating layer and the first sensor electrode pattern, and connected to a second region of the first sensor electrode pattern.Type: GrantFiled: May 7, 2020Date of Patent: July 6, 2021Assignee: JAPAN DISPLAY INC.Inventor: Tomohiko Naganuma
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Publication number: 20210157435Abstract: First electrodes are formed on an insulation surface in such a manner that the adjacent first electrodes are connected in a first direction and are separated in a second direction intersecting the first direction. Second electrodes are formed on an insulation surface in such a manner that the adjacent second electrodes are connected in the second direction and are separated in the first direction. Third electrodes are formed in regions in which the third electrodes overlap with the first electrodes and do not overlap with the second electrodes in such a manner that the adjacent third electrodes are connected in the second direction and are separated in the first direction. A flexible insulation layer is formed between the first electrodes and the third electrodes. An area of each of the third electrodes is less than an area of each of the first electrodes.Type: ApplicationFiled: January 6, 2021Publication date: May 27, 2021Applicant: Japan Display Inc.Inventors: Tomohiko NAGANUMA, Mitsuhide MIYAMOTO, Chunche MA
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Publication number: 20210134935Abstract: A display device includes a display region including a plurality of first regions, and a plurality of second regions arranged with a certain gap between the plurality of first regions, wherein each of the plurality of first regions includes a transistor, a first organic layer, a wiring, a first organic insulating layer on the wiring and the transistor, a display element on the first organic insulating layer, a first sealing layer on the display element and stacked in order with a first inorganic insulating layer, a second organic insulating layer and a second inorganic insulating layer, each of the plurality of second regions includes the wiring, a second organic layer on the wiring, a second sealing layer stacked in order with the first inorganic insulating layer and the second inorganic insulating layer, and a thickness of the second organic layer is smaller than the thickness of the first organic layer.Type: ApplicationFiled: January 8, 2021Publication date: May 6, 2021Inventor: Tomohiko NAGANUMA
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Patent number: 10936127Abstract: First electrodes are formed on an insulation surface in such a manner that the adjacent first electrodes are connected in a first direction and are separated in a second direction intersecting the first direction. Second electrodes are formed on an insulation surface in such a manner that the adjacent second electrodes are connected in the second direction and are separated in the first direction. Third electrodes are formed in regions in which the third electrodes overlap with the first electrodes and do not overlap with the second electrodes in such a manner that the adjacent third electrodes are connected in the second direction and are separated in the first direction. A flexible insulation layer is formed between the first electrodes and the third electrodes. An area of each of the third electrodes is less than an area of each of the first electrodes.Type: GrantFiled: June 12, 2019Date of Patent: March 2, 2021Assignee: Japan Display Inc.Inventors: Tomohiko Naganuma, Mitsuhide Miyamoto, Chunche Ma
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Patent number: 10923550Abstract: A display device includes a display region including a plurality of first regions, and a plurality of second regions arranged with a certain gap between the plurality of first regions, wherein each of the plurality of first regions includes a transistor, a first organic layer, a wiring, a first organic insulating layer on the wiring and the transistor, a display element on the first organic insulating layer, a first sealing layer on the display element and stacked in order with a first inorganic insulating layer, a second organic insulating layer and a second inorganic insulating layer, each of the plurality of second regions includes the wiring, a second organic layer on the wiring, a second sealing layer stacked in order with the first inorganic insulating layer and the second inorganic insulating layer, and a thickness of the second organic layer is smaller than the thickness of the first organic layer.Type: GrantFiled: August 28, 2018Date of Patent: February 16, 2021Assignee: Japan Display Inc.Inventor: Tomohiko Naganuma
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Patent number: 10923536Abstract: An organic EL display device according to an embodiment of the present invention includes: a base material; a plurality of pixels located on the base material; a lower electrode included in each of the plurality of pixels; a bank defining the plurality of pixels; an organic material layer disposed on the lower electrode and on the bank and including a plurality of layers; and an upper electrode disposed on the organic material layer. In a first layer included in the organic material layer, a non-existent region where the first layer is cut off or has a thickness thinner than that of another region is formed, and the non-existent region is formed in at least a portion of an effective region of the pixel surrounded by the bank.Type: GrantFiled: August 5, 2019Date of Patent: February 16, 2021Assignee: Japan Display Inc.Inventor: Tomohiko Naganuma
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Patent number: 10784459Abstract: A display device includes: a plurality of pixel electrodes; a first carrier injection layer, a first carrier transport layer, a light-emitting layer, a second carrier transport layer, and a second carrier injection layer provided in order on the plurality of pixel electrodes; and a counter electrode provided on the second carrier injection layer. The second carrier has a polarity opposite to that of the first carrier. The counter electrode is connected to one layer of the first carrier transport layer and the first carrier injection layer, penetrating a layer situated between the one layer and the counter electrode, between the pixel electrodes adjacent to each other in a plan view. Alternatively, an upper surface of an intermediate electrode situated between the pixel electrodes adjacent to each other in a plan view is connected to the first carrier injection layer.Type: GrantFiled: December 12, 2018Date of Patent: September 22, 2020Assignee: Japan Display Inc.Inventor: Tomohiko Naganuma
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Publication number: 20200295304Abstract: Layers interposed between a light emitting layer and pixel electrodes include an upper layer including at least one layer above a carrier generation layer and a lower layer including one or more layers below the carrier generation layer. The carrier generation layer has carrier mobility 100 times or higher than any one of one layer contacting a lower surface of the light emitting layer and one layer contacting a lower surface of the carrier generation layer. Light emitting sections are divided into groups corresponding to different light emitting colors. Each of the groups is different from at least one of the other groups in the distance that a corresponding group of the light emitting sections has from the lower surface of the light emitting layer to a reflective surface. First sections have a uniform thickness.Type: ApplicationFiled: March 4, 2020Publication date: September 17, 2020Applicant: Japan Display Inc.Inventor: Tomohiko NAGANUMA
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Publication number: 20200264731Abstract: A display device includes a display region including a plurality of pixels and a separation region between each of the plurality of pixels and a touch sensor overlapping the display region. The touch sensor includes a sensor electrode and an insulating layer. The sensor electrode includes a first sensor electrode pattern overlapping at least one of the plurality of pixels and a second sensor electrode pattern overlapping at least a part of the separation region. The insulating layer is arranged between the first sensor electrode pattern and the second sensor electrode pattern, and overlaps the first sensor electrode pattern, and covers a first region of the first sensor electrode pattern. The second sensor electrode pattern is arranged on the insulating layer and the first sensor electrode pattern, and connected to a second region of the first sensor electrode pattern.Type: ApplicationFiled: May 7, 2020Publication date: August 20, 2020Applicant: Japan Display Inc.Inventor: Tomohiko NAGANUMA
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Publication number: 20200117297Abstract: A display device according to an embodiment of the present invention includes: an insulation layer having an insulation surface; and a touch sensor provided on an upper surface of the insulation surface; the touch sensor includes a plurality of first electrodes and a plurality of second electrodes provided on the upper surface of the insulation surface forming first electrostatic capacitance, a piezoelectric layer provided on upper surfaces of the plurality of first electrodes and the plurality of second electrodes and charged according to applying a pressing force, a pulse generator applying a pulse voltage to the first electrodes, and a determination circuit detecting a change in the first electrostatic capacitance from a change in a first measurement value caused by the application of the pulse voltage and detecting strength of the pressing force from a change in a second measurement value not caused by the application of the pulse voltage.Type: ApplicationFiled: December 13, 2019Publication date: April 16, 2020Applicant: Japan Display Inc.Inventor: Tomohiko NAGANUMA
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Publication number: 20200052046Abstract: An organic EL display device according to an embodiment of the present invention includes: a base material; a plurality of pixels located on the base material; a lower electrode included in each of the plurality of pixels; a bank defining the plurality of pixels; an organic material layer disposed on the lower electrode and on the bank and including a plurality of layers; and an upper electrode disposed on the organic material layer. In a first layer included in the organic material layer, a non-existent region where the first layer is cut off or has a thickness thinner than that of another region is formed, and the non-existent region is formed in at least a portion of an effective region of the pixel surrounded by the bank.Type: ApplicationFiled: August 5, 2019Publication date: February 13, 2020Applicant: Japan Display Inc.Inventor: Tomohiko NAGANUMA
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Patent number: 10444880Abstract: There is provided a touch or proximity sensor including a plurality of first touch electrodes extending in a first direction and being arranged in a second direction intersecting the first direction, and a plurality of second touch electrodes extending in the second direction, being arranged in the first direction, and insulated from the plurality of first touch electrodes, in which at least one of the plurality of first touch electrodes and at least one of the plurality of second touch electrodes respectively have concave surface on a detection surface side.Type: GrantFiled: November 13, 2017Date of Patent: October 15, 2019Assignee: Japan Display Inc.Inventor: Tomohiko Naganuma
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Patent number: 10429984Abstract: A sensing circuit is configured to measure a first physical quantity corresponding to a first capacitance being a parasitic capacitance formed in at least one of electrode groups including a plurality of first electrodes and a plurality of second electrodes, to thereby detect that significant change has occurred in the first capacitance due to touching of a conductor when an obtained first measurement value is out of a first range. The sensing circuit is further configured to measure a second physical quantity corresponding to a second capacitance formed between each of the plurality of first electrodes and each of the plurality of second electrodes, to thereby detect that significant change has occurred in the second capacitance due to compression of an insulating elastic layer based on a pressing force when an obtained second measurement value is out of a second range.Type: GrantFiled: May 25, 2017Date of Patent: October 1, 2019Assignee: Japan Display Inc.Inventors: Yuko Matsumoto, Tomohiko Naganuma
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Publication number: 20190294276Abstract: First electrodes are formed on an insulation surface in such a manner that the adjacent first electrodes are connected in a first direction and are separated in a second direction intersecting the first direction. Second electrodes are formed on an insulation surface in such a manner that the adjacent second electrodes are connected in the second direction and are separated in the first direction. Third electrodes are formed in regions in which the third electrodes overlap with the first electrodes and do not overlap with the second electrodes in such a manner that the adjacent third electrodes are connected in the second direction and are separated in the first direction. A flexible insulation layer is formed between the first electrodes and the third electrodes. An area of each of the third electrodes is less than an area of each of the first electrodes.Type: ApplicationFiled: June 12, 2019Publication date: September 26, 2019Applicant: Japan Display Inc.Inventors: Tomohiko NAGANUMA, Mitsuhide MIYAMOTO, Chunche MA