Patents by Inventor Hironori Toyoda

Hironori Toyoda 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).

  • Publication number: 20180315955
    Abstract: An organic electroluminescence display device includes: a lower electrode that is made of a conductive inorganic material and formed in each of pixels arranged in a matrix in a display area; a light-emitting organic layer that is in contact with the lower electrode and made of a plurality of different organic material layers including a light-emitting layer emitting light; an upper electrode that is in contact with the light-emitting organic layer, formed so as to cover the whole of the display area, and made of a conductive inorganic material; and a conductive organic layer that is in contact with the upper electrode, formed so as to cover the whole of the display area, and made of a conductive organic material.
    Type: Application
    Filed: July 9, 2018
    Publication date: November 1, 2018
    Inventors: Toshihiro SATO, Hironori TOYODA
  • Publication number: 20180294423
    Abstract: To provide a display device including a light emitting element layer including an anode electrode, a light emissive layer formed on the anode electrode, and a cathode electrode formed on the light emissive layer, and a bank formed on the lower electrode and having an opening, in which the lower electrode is partially exposed, wherein the light emissive layer includes a p-doped hole transport layer containing p-dopant, and the p-doped hole transport layer contains a larger amount of p-dopant in an area close to an end portion of the opening of the bank than the amount of p-dopant contained in other areas.
    Type: Application
    Filed: March 13, 2018
    Publication date: October 11, 2018
    Applicant: Japan Display Inc.
    Inventor: Hironori TOYODA
  • Publication number: 20180294424
    Abstract: To provide a display device including a plurality of pixels; a light emitting element layer formed across the plurality of pixels; and a bank formed so as to separately define adjacent pixels among the plurality of pixels, wherein the light emitting element layer includes a p-doped hole transport layer containing p-dopant, and the p-doped hole transport layer is formed on each of the pixels such that the p-doped hole transport layers on the respective adjacent pixels are separated from each other on the bank.
    Type: Application
    Filed: March 28, 2018
    Publication date: October 11, 2018
    Applicant: Japan Display Inc.
    Inventor: Hironori TOYODA
  • Publication number: 20180294431
    Abstract: An organic EL display device includes an anode, an organic light-emitting unit formed on the anode, and a cathode formed on the organic light-emitting unit and containing In. The organic light-emitting unit includes a light-emitting layer, and an electron injection layer formed between the cathode and the light-emitting layer, and an In concentration in layers of the organic light-emitting unit other than the electron injection layer is equal to or less than one-twentieth that in the cathode.
    Type: Application
    Filed: March 14, 2018
    Publication date: October 11, 2018
    Applicant: Japan Display Inc.
    Inventors: Hironori TOYODA, Takahiro USHIKUBO
  • Patent number: 10095073
    Abstract: A display device includes: a pixel electrode formed on an insulating surface; a bank that covers an edge of the pixel electrode and at the same time has an opening in which an upper surface of the pixel electrode is not covered by the bank; an organic layer that covers the opening and includes a light emitting layer; an opposing electrode that is formed on the organic layer and the bank; a cap layer that is formed on the opposing electrode; and a hygroscopic layer that contains a hygroscopic agent and that is formed on the opposing electrode in a region that overlaps with the bank but does not overlap with the opening in a planar view from a display surface side.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: October 9, 2018
    Assignee: Japan Display Inc.
    Inventor: Hironori Toyoda
  • Patent number: 10043995
    Abstract: An organic electroluminescence display device includes: a lower electrode that is made of a conductive inorganic material and formed in each of pixels arranged in a matrix in a display area; a light-emitting organic layer that is in contact with the lower electrode and made of a plurality of different organic material layers including a light-emitting layer emitting light; an upper electrode that is in contact with the light-emitting organic layer, formed so as to cover the whole of the display area, and made of a conductive inorganic material; and a conductive organic layer that is in contact with the upper electrode, formed so as to cover the whole of the display area, and made of a conductive organic material.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: August 7, 2018
    Assignee: Japan Display Inc.
    Inventors: Toshihiro Sato, Hironori Toyoda
  • Publication number: 20180175118
    Abstract: An organic EL display device includes at least one light emitting unit that includes a first electrode, an organic film that includes a light emitting layer and is provided over the first electrode, and a second electrode that is provided over the organic film and transmits light from the light emitting layer, and an optical adjusting layer that covers the at least one light emitting unit. The optical adjusting layer in a first area that overlaps the at least one light emitting unit in a planar view and the optical adjusting layer in at least one second area that is adjacent to the first area are different from each other in at least one of a number of layers that the optical adjusting layer includes, a film thickness, and a refractive index.
    Type: Application
    Filed: December 14, 2017
    Publication date: June 21, 2018
    Applicant: Japan Display Inc.
    Inventors: Hironori TOYODA, Norihisa Maeda
  • Publication number: 20180166651
    Abstract: An organic electroluminescence display device includes: a lower electrode that is made of a conductive inorganic material and formed in each of pixels arranged in a matrix in a display area; a light-emitting organic layer that is in contact with the lower electrode and made of a plurality of different organic material layers including a light-emitting layer emitting light; an upper electrode that is in contact with the light-emitting organic layer, formed so as to cover the whole of the display area, and made of a conductive inorganic material; and a conductive organic layer that is in contact with the upper electrode, formed so as to cover the whole of the display area, and made of a conductive organic material.
    Type: Application
    Filed: January 26, 2018
    Publication date: June 14, 2018
    Inventors: Toshihiro Sato, Hironori Toyoda
  • Patent number: 9972666
    Abstract: A display device includes a pixel electrode, a pixel isolation insulating film in which an opening through which the pixel electrode is exposed at a bottom is formed, and a light-emitting layer formed inside the opening. The pixel isolation insulating film contains particles that receive light emitted from the light-emitting layer and propagate light in a direction different from that of the light emitted from the light-emitting layer.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: May 15, 2018
    Assignee: Japan Display Inc.
    Inventors: Hironori Toyoda, Toshihiro Sato
  • Publication number: 20180088419
    Abstract: A display device includes: a pixel electrode formed on an insulating surface; a bank that covers an edge of the pixel electrode and at the same time has an opening in which an upper surface of the pixel electrode is not covered by the bank; an organic layer that covers the opening and includes a light emitting layer; an opposing electrode that is formed on the organic layer and the bank; a cap layer that is formed on the opposing electrode; and a hygroscopic layer that contains a hygroscopic agent and that is formed on the opposing electrode in a region that overlaps with the bank but does not overlap with the opening in a planar view from a display surface side.
    Type: Application
    Filed: September 18, 2017
    Publication date: March 29, 2018
    Applicant: Japan Display Inc.
    Inventor: Hironori TOYODA
  • Patent number: 9929375
    Abstract: An organic electroluminescence display device includes: a lower electrode that is made of a conductive inorganic material and formed in each of pixels arranged in a matrix in a display area; a light-emitting organic layer that is in contact with the lower electrode and made of a plurality of different organic material layers including a light-emitting layer emitting light; an upper electrode that is in contact with the light-emitting organic layer, formed so as to cover the whole of the display area, and made of a conductive inorganic material; and a conductive organic layer that is in contact with the upper electrode, formed so as to cover the whole of the display area, and made of a conductive organic material.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: March 27, 2018
    Assignee: Japan Display Inc.
    Inventors: Toshihiro Sato, Hironori Toyoda
  • Publication number: 20180062114
    Abstract: A display device includes a light emitting device layer including a light emitting layer, a light-transmissive upper electrode on the light emitting device layer, a lower electrode having light transmittance and moisture permeability under the light emitting device layer, a light reflection layer under the lower electrode, and a hygroscopic layer having a hygroscopic property between the lower electrode and the light reflection layer.
    Type: Application
    Filed: July 24, 2017
    Publication date: March 1, 2018
    Applicant: Japan Display Inc.
    Inventor: Hironori TOYODA
  • Publication number: 20180019436
    Abstract: An organic electroluminescence display device includes: a lower electrode that is made of a conductive inorganic material and formed in each of pixels arranged in a matrix in a display area; a light-emitting organic layer that is in contact with the lower electrode and made of a plurality of different organic material layers including a light-emitting layer emitting light; an upper electrode that is in contact with the light-emitting organic layer, formed so as to cover the whole of the display area, and made of a conductive inorganic mate-rial; and a conductive organic layer that is in contact with the upper electrode, formed so as to cover the whole of the display area, and made of a conductive organic material.
    Type: Application
    Filed: September 15, 2017
    Publication date: January 18, 2018
    Inventors: Toshihiro Sato, Hironori Toyoda
  • Patent number: 9825102
    Abstract: An organic EL display device includes: a TFT substrate that includes a display area in which pixels are arranged in a matrix; and a color filter substrate that is provided to face the TFT substrate and includes an area transmitting light in a predetermined wavelength range for each of the pixels. Each of the pixels of the TFT substrate includes a pair of electrodes, at least two light emission layers that are arranged between the pair of electrodes, and a charge generation layer that is arranged between the at least two light emission layers, is a layer to generate a pair of positive and negative charges, and has different film thicknesses in accordance with the predetermined wavelength range of the corresponding area.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: November 21, 2017
    Assignee: Japan Display Inc.
    Inventors: Hironori Toyoda, Toshihiro Sato
  • Patent number: 9799846
    Abstract: An organic electroluminescence display device includes: a lower electrode that is made of a conductive inorganic material and formed in each of pixels arranged in a matrix in a display area; a light-emitting organic layer that is in contact with the lower electrode and made of a plurality of different organic material layers including a light emitting layer emitting light; an upper electrode that is in contact with the light-emitting organic layer, formed so as to cover the whole of the display area, and made of a conductive inorganic material; and a conductive organic layer that is in contact with the upper electrode, formed so as to cover the whole of the display area, and made of a conductive organic material.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: October 24, 2017
    Assignee: Japan Display Inc.
    Inventors: Toshihiro Sato, Hironori Toyoda
  • Publication number: 20170279067
    Abstract: An organic EL display device includes an anode, a cathode and a light-emitting unit disposed between the anode and the cathode. The cathode is a transparent conductive film formed on the light-emitting unit. The light-emitting unit includes a light-emitting layer, an electron transport layer disposed between the light-emitting layer and the cathode, and an electron injection layer, disposed between the electron transport layer and the cathode, which is doped with an alkali metal. A thickness of the electron injection layer is equal to or greater than two times that of the electron transport layer.
    Type: Application
    Filed: December 9, 2016
    Publication date: September 28, 2017
    Applicant: Japan Display Inc.
    Inventors: Takahiro Ushikubo, Hironori Toyoda
  • Publication number: 20170278911
    Abstract: A display device includes a pixel electrode, a pixel isolation insulating film in which an opening through which the pixel electrode is exposed at a bottom is formed, and a light-emitting layer formed inside the opening. The pixel isolation insulating film contains particles that receive light emitted from the light-emitting layer and propagate light in a direction different from that of the light emitted from the light-emitting layer.
    Type: Application
    Filed: March 7, 2017
    Publication date: September 28, 2017
    Applicant: Japan Display Inc.
    Inventors: Hironori TOYODA, Toshihiro Sato
  • Patent number: 9692001
    Abstract: The display device includes a first organic electroluminescence element which includes an anode and a cathode which form a pair, and a light emitting layer which is formed between the anode and the cathode on a substrate. The light emitting layer includes a plurality of sub-light emitting layers which perform light emitting of colors which are respectively different. Each of the plurality of sub-light emitting layers is doped with a quantum dot light emitting material corresponding to a color to be emitted. A current with current density corresponding to a position of a sub-light emitting layer of a desired color among the plurality of sub-light emitting layers is injected to the light emitting layer, and the sub-light emitting layer of the desired color performs light emitting.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: June 27, 2017
    Assignee: Japan Display Inc.
    Inventors: Hironori Toyoda, Toshihiro Sato
  • Publication number: 20170125727
    Abstract: An organic electroluminescence display device includes: a lower electrode that is made of a conductive inorganic material and formed in each of pixels arranged in a matrix in a display area a light-emitting organic layer that is in contact with the lower electrode and made of a plurality of different organic material layers including a light emitting layer emitting light; an upper electrode that is in contact with the light-emitting organic layer, formed so as to cover the whole of the display area, and made of a conductive inorganic material; and a conductive organic layer that is in contact with the upper electrode, formed so as to cover the whole of the display area, and made of a conductive organic material.
    Type: Application
    Filed: January 9, 2017
    Publication date: May 4, 2017
    Inventors: Toshihiro SATO, Hironori TOYODA
  • Patent number: 9614011
    Abstract: There is provided an EL display device of a color filter system which obtains sufficient brightness and contrast while making it difficult to generate a color mixture even if pixels become fine. An EL display device 100 according to the present invention includes a first substrate 1, a circuit layer 2 formed on the first substrate 1, a color selection reflection layer 11 formed in an upper layer of the circuit layer 2, lower electrodes 5 formed in an upper layer of the color selection reflection layer 11, a white light emission EL layer 7 formed in an upper layer of the lower electrodes 5, an upper electrode 8 formed in an upper layer of the EL layer 7, and a sealing layer 9 formed in an upper layer of the upper electrode 8.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: April 4, 2017
    Assignee: Japan Display Inc.
    Inventors: Toshihiro Sato, Hironori Toyoda, Jun Fujiyoshi