Patents by Inventor Masumi Kubo

Masumi Kubo 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).

  • Patent number: 11917842
    Abstract: A method for manufacturing a light-emitting device includes forming, on a substrate, a first electrode, and forming a quantum dot layer. The forming the quantum dot layer includes performing first application involves applying a first solution on a position overlapping with the substrate; performing first light irradiation involves irradiating with light the position where the first solution is applied, to melt the ligand and vaporize the first solvent; performing second light irradiation involves irradiating the position with light to raise a temperature of the quantum dot; and performing third light irradiation involves irradiating the position with light to cause the first inorganic precursor to epitaxially grow around the first shell so as to form a second shell with which the first shell is coated. In the performing third light irradiation, at least one set of the quantum dots adjacent to each other is connected to each other via the second shell.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: February 27, 2024
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Masumi Kubo
  • Publication number: 20230422553
    Abstract: A display device includes a plurality of light-emitting elements each including: a first electrode; a second electrode; and a light-emitting layer between the first electrode and the second electrode, the plurality of light-emitting elements including: at least one main light-emitting element containing quantum dots in the light-emitting layer; and at least one set of compact light-emitting elements including a plurality of compact light-emitting elements smaller than the at least one main light-emitting element.
    Type: Application
    Filed: November 30, 2020
    Publication date: December 28, 2023
    Inventors: YUSUKE SAKAKIBARA, Masumi KUBO
  • Publication number: 20230284473
    Abstract: In a light-emitting device, a first electrode, a light-emitting layer, and a second electrode are disposed in the order recited. Moreover, a charge transport layer is disposed between the first electrode and the light-emitting layer and/or between the second electrode and the light-emitting layer. A third electrode at least partly overlaps the light-emitting layer. Moreover, the third electrode is disposed between the charge transport layer and the light-emitting layer.
    Type: Application
    Filed: July 29, 2020
    Publication date: September 7, 2023
    Inventors: HIROHISA YAMADA, YOSHIHIRO UETA, Masumi KUBO, Masaki YAMAMOTO
  • Publication number: 20230090605
    Abstract: A method for manufacturing a light-emitting device includes performing application, performing temperature raising, and performing first light irradiation. In the performing application, a solution including quantum dots, a ligand, an inorganic precursor, and a solvent is applied on a position overlapping with the substrate. The quantum dots each includes a core and a first shell coating the core. In the performing temperature raising, a temperature is raised until the ligand melts and the solvent vaporizes after the performing application. In the performing first light irradiation, light irradiation is performed after the performing temperature raising. In the performing first light irradiation, the inorganic precursor is epitaxially grown around the first shell to form a second shell coating the first shell, and an inorganic film in which the inorganic precursor is epitaxially grown at an interface between the quantum dot layer and the first charge transport layer is formed.
    Type: Application
    Filed: February 6, 2020
    Publication date: March 23, 2023
    Inventor: Masumi KUBO
  • Publication number: 20230089691
    Abstract: A method for manufacturing a light-emitting device includes forming the quantum dot layer, wherein the forming the quantum dot layer includes performing first application of applying, on a position overlapping with the substrate, a first solution including quantum dots, a ligand, a first inorganic precursor, and a first solvent, the quantum dots each including a core and a first shell coating the core, the ligand coordinating with each of the quantum dots, performing temperature raising of raising a temperature until the ligand melts and the first solvent vaporizes after the performing first application, performing first temperature lowering of lowering a temperature to a melting point of the ligand or lower after the performing temperature raising, and performing first light irradiation of epitaxially growing the first inorganic precursor around the first shell by first light irradiation after the performing first temperature lowering to form a second shell coating the first shell.
    Type: Application
    Filed: February 6, 2020
    Publication date: March 23, 2023
    Inventor: Masumi KUBO
  • Publication number: 20230058785
    Abstract: A method for manufacturing a quantum dot layer includes: performing first application of applying, to a position overlapping with a substrate, a first solution including a plurality of particles including a core and a first ligand, a first inorganic precursor, and a first solvent; performing first heating of heating first solution to a first temperature or higher after the performing first application, the first temperature being a higher temperature of a melting point of the first ligand and a boiling point of the first solvent; and performing second heating of heating the first inorganic precursor to a second temperature after the performing first heating, the second temperature being higher than the first temperature and being a temperature, at which the first inorganic precursor epitaxially grows around the core and at which a first shell configured to coat the core is formed to form a plurality of first quantum dots.
    Type: Application
    Filed: February 6, 2020
    Publication date: February 23, 2023
    Inventor: Masumi KUBO
  • Publication number: 20230053170
    Abstract: A method for manufacturing a light-emitting device a first solution including a first solvent, quantum dots, a ligand, and a first inorganic precursor, the quantum dots each including a core and a first shell performing first heating of raising to a first temperature or higher, the first temperature being a higher temperature of a melting point of the ligand and a boiling point of the first solvent, and performing second heating of raising to a second temperature, the second temperature being higher than the first temperature and being a temperature at which the first inorganic precursor epitaxially grows and a second shell coating the first shell is formed to form a plurality of first quantum dots, and wherein a plurality of second quantum dots each including, in a core, the same material as a material of the second shells are also formed.
    Type: Application
    Filed: February 6, 2020
    Publication date: February 16, 2023
    Inventor: Masumi KUBO
  • Publication number: 20220344606
    Abstract: A display device includes: ferritin encaging a first quantum dot and modified with a first peptide bound to a first pixel electrode; and ferritin encaging a second quantum dot and modified with a second peptide bound to a second pixel electrode. A first metal material and a second metal material are of different types.
    Type: Application
    Filed: October 2, 2019
    Publication date: October 27, 2022
    Inventors: HIROFUMI YOSHIKAWA, TATSUYA RYOHWA, Masumi KUBO, TAKAHIRO DOE, Masaki YAMAMOTO
  • Publication number: 20220320191
    Abstract: A display device includes a plurality of pixel electrodes, a common electrode common to the plurality of pixel electrodes, and a light-emitting layer sandwiched between the plurality of pixel electrodes and the common electrode. The light-emitting layer includes quantum dots covered by ferritin. Each of the plurality of pixel electrodes and the quantum dots are bonded via a peptide modifying the ferritin.
    Type: Application
    Filed: October 2, 2019
    Publication date: October 6, 2022
    Inventors: HIROFUMI YOSHIKAWA, TATSUYA RYOHWA, Masumi KUBO, TAKAHIRO DOE, Masaki YAMAMOTO
  • Publication number: 20220149249
    Abstract: A light-emitting device includes, light-emitting elements each including a first electrode, a second electrode, and a quantum dot layer interposed between the first electrode and the second electrode. The quantum dot layer includes a quantum dot structure including a quantum dot having a core and a first shell, with which the core is coated, and a second shell, with which the first shell is coated. The first shell and the second shell have a crystal structure, and at least one set of the quantum dots adjacent to each other is connected to each other by the crystal structure of the second shell. Forming the quantum dot layer includes vaporizing a solvent of a solution in which a ligand is dispersed, cooling, and forming the second shell by epitaxial growth around the first shell in that order.
    Type: Application
    Filed: February 20, 2019
    Publication date: May 12, 2022
    Inventor: Masumi KUBO
  • Publication number: 20220149338
    Abstract: A method for manufacturing a light-emitting device that is provided with, on a substrate, a light-emitting element including a first electrode, a second electrode, and a quantum dot layer, the method including: forming the quantum dot layer, the forming the quantum dot layer including performing first application that involves applying a first solution, performing first heating that involves raising an atmospheric temperature around the substrate to a temperature equal to or higher than a first temperature, and performing second heating that involves raising the atmospheric temperature to a second temperature, wherein the first solution contains a first solvent, quantum dots, a ligand, the quantum dot includes a core and a first shell, the second temperature is a temperature to form a second shell, and at least one set of the quantum dots adjacent to each other is connected to each other via the second shell.
    Type: Application
    Filed: February 20, 2019
    Publication date: May 12, 2022
    Inventor: Masumi KUBO
  • Publication number: 20220140270
    Abstract: A method for manufacturing a light-emitting device includes forming on a substrate, a first electrode, and forming a quantum dot layer. The forming the quantum dot layer includes performing first application involves applying a first solution on a position overlapping with the substrate; performing first light irradiation involves irradiating with light the position where the first solution is applied, to melt the ligand and vaporize the first solvent, performing second light irradiation involves irradiating the position with light to raise a temperature of the quantum dot; and performing third light irradiation involves irradiating the position with light to cause the first inorganic precursor to epitaxially grow around the first shell so as to form a second shell with which the first shell is coated. In the performing third light irradiation, at least one set of the quantum dots adjacent to each other is connected to each other via the second shell.
    Type: Application
    Filed: February 20, 2019
    Publication date: May 5, 2022
    Inventor: Masumi KUBO
  • Publication number: 20220131049
    Abstract: A method for manufacturing a light-emitting device includes forming the quantum dot layer. The forming the quantum dot layer includes: performing first application that involves applying a first solution on a position overlapping with the substrate; performing first light irradiation, that involves irradiating with light, from above the substrate, the position where the first solution is applied; performing second light irradiation, that involves irradiating the position with light to raise a temperature of the quantum dot; and performing third light irradiation, that involves irradiating the position with light to cause the first inorganic precursor to epitaxially grow around the first shell. In the performing third light irradiation, at least one set of the quantum dots adjacent to each other is connected to each other via the second shell.
    Type: Application
    Filed: February 20, 2019
    Publication date: April 28, 2022
    Inventor: Masumi KUBO
  • Publication number: 20220123271
    Abstract: A light-emitting device (1) is provided with, on a substrate (3), light-emitting elements (2R, 2G, 2B) each including a first electrode (4), a second electrode (12), and a quantum dot layer (8) interposed between the first electrode and the second electrode. The quantum dot layer is provided with quantum dots (20R, 20G, 20B) including cores (22R, 22G, 22B) and shells (24R, 24G, 24B) with which the cores are coated, and ligands (18R, 18G, 18B) to coordinate with the quantum dots. A step of forming the quantum dot layer includes a step of light irradiation configured to form an exposure region where, by the light irradiation using a photomask, the ligand melts and a solvent of a solution in which the ligand is dispersed vaporizes, and a non-exposure region at a position different from a position on which the light irradiation is performed.
    Type: Application
    Filed: February 20, 2019
    Publication date: April 21, 2022
    Inventor: Masumi KUBO
  • Publication number: 20160327836
    Abstract: An optical device (100) includes: a first substrate (10) and a second substrate (20) opposing each other; an optical layer (30) interposed between the first substrate and the second substrate; and a first electrode (11) and a second electrode (12) to which different potentials can be applied. The optical layer includes a medium (31) and anisotropically-shaped particles (32) dispersed in the medium, the anisotropically-shaped particles having shape anisotropy. The alignment direction of the anisotropically-shaped particles changes depending on a voltage applied across the optical layer. The voltage applied across the optical layer is an oscillating voltage alternately including a first period in which an absolute value is relatively large and a second period in which an absolute value is relatively small.
    Type: Application
    Filed: August 29, 2014
    Publication date: November 10, 2016
    Inventors: Hiroyuki MORIWAKI, Masumi KUBO, Kazutaka HANAOKA
  • Patent number: 9019455
    Abstract: A liquid crystal display device includes a vertical alignment liquid crystal layer, first and second substrates, first and second electrodes, and a pixel region which includes first, second, third and fourth liquid crystal domains in which liquid crystal molecules are tilted in first, second, third and fourth directions, respectively. The first liquid crystal domain is located close to at least a part of an edge of the first electrode, the second liquid crystal domain is located close to at least a part of another edge of the first electrode, the third liquid crystal domain is located close to at least a part of still another edge of the first electrode, and the fourth liquid crystal domain is located close to at least a part of yet another edge of the first electrode.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: April 28, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akihiro Shoraku, Toshihide Tsubata, Koichi Miyachi, Iichiro Inoue, Akihiro Yamamoto, Yoshito Hashimoto, Masumi Kubo, Akihito Jinda
  • Patent number: 8654286
    Abstract: The present invention provides a liquid crystal display device which allows an improvement in contrast ratio by compensating retardation given in a liquid crystal layer, even if a retardation layer has an inclined portion, and a desired retardation is varied at the inclined portion. The present invention is a vertical alignment liquid crystal display device, including: a pair of substrates facing each other; a liquid crystal layer disposed between the pair of substrates; a transmissive display region; and a reflective display region, wherein one of the pair of substrates includes a ?/4 retardation layer in the reflective display region, the ?/4 retardation layer protruding towards the liquid crystal layer, the ?/4 retardation layer includes an inclined portion inclined to a flat face of the substrate, and an azimuth of the inclined portion is substantially parallel to a slow axis azimuth of the ?/4 retardation layer.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: February 18, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshito Hashimoto, Hiroyuki Ohgami, Masayuki Soga, Katsuhiro Kikuchi, Masakazu Shibasaki, Yuichi Iyama, Masumi Kubo
  • Patent number: 8546808
    Abstract: The liquid crystal display device of this invention includes picture element regions each defined by a first electrode provided on a first substrate and a second electrode provided on a second substrate so as to oppose the first electrode via a liquid crystal layer sandwiched therebetween. In each of the picture element regions, the first electrode includes a solid portion and a nonsolid portion. The liquid crystal display device further includes a pair of polarizing plates disposed with polarization axes thereof crossing each other substantially perpendicularly. The polarization axis of one of the pair of polarizing plates is substantially parallel to a direction in which the solid portion extends. When a voltage is applied between the first electrode and the second electrode, in each of the picture element regions, liquid crystal molecules of the liquid crystal layer are in a radially-inclined orientation state.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: October 1, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masumi Kubo, Akihiro Yamamoto, Takashi Ochi, Tetsuhiro Yamaguchi, Naoshi Yamada, Katsuhiko Morishita, Kiyoshi Ogishima, Kazuhiro Maekawa
  • Patent number: 8421972
    Abstract: There is provided a liquid crystal display device of high picture quality with high brightness and small display unevenness. A vertical alignment type liquid crystal display device which has a plurality of pixels includes: a first electrode which includes, in each of the plurality of pixels, a plurality of first branch portions extending in a first direction and a plurality of second branch portions extending in a second direction that is different from the first direction; a second electrode disposed so as to oppose the first electrode; and a liquid crystal layer interposed between the first electrode and the second electrode, wherein a width of each of the plurality of first branch portions and the plurality of second branch portions is in a range not less than 1.4 ?m and not more than 8.0 ?m.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: April 16, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroyuki Ohgami, Yoshito Hashimoto, Masakazu Shibasaki, Yuichi Iyama, Masumi Kubo, Masayuki Soga
  • Patent number: 8416380
    Abstract: Disclosed is a liquid crystal display panel which causes no gray scale inversion, even when obliquely viewed, and which realizes suppression of a gamma characteristics change and a chromaticity change. The liquid crystal display panel is made of a pair of substrates, at least one of which includes a plurality of pixel electrodes containing red, green and blue pixel electrodes, and a liquid crystal layer arranged between the pair of substrates. The liquid crystal layer is divided for each pixel into a first region and a second region, which have liquid crystal molecules different in the directions of inclination from each other. Both of the liquid crystal molecules positioned in the first region and the second region are oriented either vertically or horizontally when the pair of substrates is viewed in the front direction, and are oriented obliquely with respect to the substrate surface and symmetrically of each other when the pair of substrates is viewed in the cross-sectional direction.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: April 9, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akihiro Yamamoto, Yusuke Nishihara, Iori Aoyama, Tokio Taguchi, Masumi Kubo