Patents by Inventor Kenji Okumoto

Kenji Okumoto 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: 20140167018
    Abstract: An organic EL display panel has a transistor array substrate, an inter-layer insulation film, pixel electrodes, an organic EL layer, and a common electrode. The transistor array substrate has drive units, including TFT elements. The inter-layer insulation film covers the transistor array substrate, and has contact holes corresponding to the drive units. The pixel electrodes on the inter-layer insulation film correspond to the drive units, and are electrically connected thereto via the contact holes. The organic EL layer covers regions where the pixel electrodes are and are not disposed. The common electrode covers the entire organic EL layer. Organic EL layer regions corresponding to the contact holes of the inter-layer insulation film and between neighbouring pixel electrodes have greater electrical resistance than other regions.
    Type: Application
    Filed: February 8, 2012
    Publication date: June 19, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Kenji Okumoto, Masaomi Shibata
  • Patent number: 8748875
    Abstract: An organic electro-luminescence (EL) display device according to the present invention includes: a main substrate; a display section provided above the main substrate and including a red light-emitting layer, a green light-emitting layer, a blue light-emitting layer, and a bank; a blue color filter provided above the display section, which selectively transmits blue light and selectively absorbs green light and red light; and a red color filter provided above the display section, which selectively transmits the red light and selectively absorbs the blue light and the green light, wherein the blue color filter has openings each at a position corresponding to the red light-emitting layer or the green light-emitting layer, and the red color filter has openings each at a position corresponding to the green light-emitting layer or the blue light-emitting layer.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: June 10, 2014
    Assignee: Panasonic Corporation
    Inventors: Kouhei Koresawa, Masafumi Matsui, Kenji Okumoto
  • Patent number: 8729534
    Abstract: Disclosed is an organic EL display panel provided with a substrate and a plurality of sub-pixels that are disposed in a matrix upon the substrate, wherein: the sub-pixels comprise sub-pixels that emit red light, sub-pixels that emit green light, and sub-pixels that emit blue light; the sub-pixels are each provided with a pixel electrode that is disposed upon the substrate, an organic functional layer that is formed by coating upon the pixel electrode, a counter electrode that is disposed upon the organic functional layer, and a bank that defines the space in which the organic functional layer is formed; the sub-pixels include sub-pixels (X) that are disposed on at least one section of the edge of the substrate, and sub-pixels (Y) that are disposed in the center of the substrate and that emit light with the same color as the sub-pixels (X); the volume of the organic functional layer provided in the sub-pixels (X) is larger than the volume of the organic functional layer provided in the sub-pixels (Y); and the
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: May 20, 2014
    Assignee: Panasonic Corporation
    Inventors: Hidehiro Yoshida, Kenji Okumoto
  • Publication number: 20140097421
    Abstract: Disclosed is a coated type organic EL display wherein the light extraction efficiencies of all organic light-emitting elements are improved even when the organic light-emitting elements have different organic light-emitting layers for respective emission colors. Specifically disclosed is an organic EL display which comprises a substrate and a red organic light-emitting element (R), a green organic light-emitting element (G), and a blue organic light-emitting element (B) arranged on the substrate. Each organic light-emitting element has a pixel electrode that is a reflective electrode, a functional layer formed on the pixel electrode by coating, an organic light-emitting layer arranged on the functional layer, a counter electrode that is a transparent electrode arranged on the organic light-emitting layer, and a tapered bank that defines the functional layer formed by coating. A dimension of a bank-to-bank gap at a top of the bank differs among the R, G, and B elements.
    Type: Application
    Filed: September 25, 2013
    Publication date: April 10, 2014
    Applicant: Panasonic Corporation
    Inventors: Hidehiro Yoshida, Kenji Okumoto, Tsuneyuki Ejima, Shuhei Nakatani
  • Publication number: 20140070203
    Abstract: Flexible device manufacturing method including: forming thin film by coating surface of support with predetermined solution in state where hydroxyl groups are present on surface; forming releasing layer by baking thin film; forming flexible substrate on releasing layer; forming device on flexible substrate; and releasing releasing layer, flexible substrate and device from support at interface between support and releasing layer. Predetermined solution contains alkylsilane alkoxide derivative and titanium alkoxide derivative. Baking temperature for baking thin film is at least 200° C. and at most 350° C. Ratio of number of silicon atoms in alkylsilane alkoxide derivative to number of titanium atoms in titanium alkoxide derivative is 3.3:1 to 4.1:1 when baking temperature is at least 200° C. and less than 270° C., 3.3:1 to 23:1 when baking temperature is at least 270° C. and at most 330° C., and 19:1 to 23:1 when baking temperature is more than 330° C. and at most 350° C.
    Type: Application
    Filed: July 6, 2011
    Publication date: March 13, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Yuji Tanaka, Kenji Okumoto
  • Patent number: 8652657
    Abstract: Provided is an organic EL device comprising: an organic EL element including an anode 114, an organic EL layer 116, and a cathode 117; a wiring layer 106 that supplies power to the anode 114; and an organic layer 111 interposed between the anode 114 and the wiring layer 106, wherein the organic layer 111 includes (i) a first organic layer 112 including an azatriphenylene derivative and (ii) a second organic layer 113 including an amine-based compound, the first organic layer 112 being layered on the wiring layer 106, and the second organic layer 113 being layered on the first organic layer 112.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: February 18, 2014
    Assignee: Panasonic Corporation
    Inventors: Masaomi Shibata, Kenji Okumoto, Kouhei Koresawa
  • Publication number: 20140034994
    Abstract: A method for manufacturing a light-emitting device, comprising: forming, over a substrate, a plurality of multilayered light-emitting structures each including a first electrode, a light-emitting layer, and a second electrode; forming, in the substrate, a plurality of grooves that surround the multilayered light-emitting structures individually; forming, over the substrate, a sealing film that covers the multilayered light-emitting structures and the grooves; and separating the multilayered light-emitting structures from one another after forming the sealing film, by cutting the substrate such that, in each groove, part of the sealing film covering a given inner side surface of the groove remains, the given inner side surface being adjacent to any of the multilayered light-emitting structures.
    Type: Application
    Filed: October 9, 2013
    Publication date: February 6, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Hiroaki YAMANE, Gosuke SAKAMOTO, Kenji OKUMOTO
  • Publication number: 20130306231
    Abstract: A manufacturing method of a flexible device comprises: an adjustment step of adjusting adhesive characteristics of an adhesive layer formed over a supporting substrate; a temporary bonding step of temporarily bonding the flexible substrate; an electronic device formation step of forming an electronic device; and a separation step of separating the flexible substrate. In the adjustment step, the adhesive characteristics of the adhesive layer are adjusted to satisfy a relationship of PB<PA, where PA denotes a peel strength of the adhesive layer after the electronic device formation step, in a case where the adhesive layer undergoes the electronic device formation step without undergoing the adjustment step, and PB denotes a peel strength of the adhesive layer after the electronic device formation step, in a case where the adhesive layer undergoes the electronic device formation step after undergoing the adjustment step.
    Type: Application
    Filed: July 29, 2013
    Publication date: November 21, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Yuji TANAKA, Kenji OKUMOTO
  • Patent number: 8570252
    Abstract: An organic EL light emitting device is provided with: a substrate having a coloring region where two or more pixel regions are arranged in a line; line-shaped main banks which define the coloring region and face each other; pixel separation regions arranged among the pixel regions in the coloring region; a pixel electrode arranged for each of the pixel regions; and organic function layers arranged on the pixel electrodes.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: October 29, 2013
    Assignee: Panasonic Corporation
    Inventors: Hidehiro Yoshida, Kenji Okumoto, Keisei Yamamuro
  • Patent number: 8564196
    Abstract: An organic EL display device including organic EL light-emitting regions which includes a red-light emitting layer, a green-light emitting layer, and a blue-light emitting layer that are arranged on a main substrate includes: a first light-adjusting layer including a first portion and a second portion, the first portion selectively transmitting desired blue light, and the second portion absorbing visible light other than at least the desired blue light; and a second light-adjusting layer selectively absorbing light with a wavelength between desired red light and desired green light at an entire surface, in which the blue light-emitting layer is overlaid with the first portion, and a bank which is a non-light emitting portion is overlaid with the second portion. The first portion and the second portion may be integrally formed of a same material, and the second portion may absorb an entire range of visible light.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: October 22, 2013
    Assignee: Panasonic Corporation
    Inventors: Kenji Okumoto, Masafumi Matsui, Takashi Ohta, Kouhei Koresawa
  • Patent number: 8513881
    Abstract: An organic EL display device including organic EL light-emitting regions which includes a red-light emitting layer, a green-light emitting layer, and a blue-light emitting layer that are arranged on a main substrate includes: a first light-adjusting layer including a first portion and a second portion, the first portion selectively transmitting desired blue light, and the second portion absorbing visible light other than at least the desired blue light; and a second light-adjusting layer selectively absorbing light with a wavelength between desired red light and desired green light at an entire surface, in which the blue light-emitting layer is overlaid with the first portion, and a bank which is a non-light emitting portion is overlaid with the second portion. The first portion and the second portion may be integrally formed of a same material, and the second portion may absorb an entire range of visible light.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: August 20, 2013
    Assignee: Panasonic Corporation
    Inventors: Kenji Okumoto, Masafumi Matsui, Takashi Ohta, Kouhei Koresawa
  • Patent number: 8445895
    Abstract: An organic electroluminescence element having a cathode as a top electrode, and excelling in luminance efficiency, drive voltage, and operational life is provided. The organic electroluminescence element includes an anode over a substrate and a luminescent layer over the anode. The luminescent layer comprises an organic material. An electron injection layer is over the luminescent layer for injecting electrons into the luminescent layer. The electron injection layer is a metal including at least one of an alkaline metal and an alkaline earth metal. A fullerene layer is over the electron injection layer and includes fullerenes and at least one of an alkaline metal and an alkaline earth metal. The at least one of the alkaline metal and the alkaline earth metal included in the fullerene layer has a lower work function than a lowest unoccupied molecular orbit energy level of the fullerenes. A cathode is over the fullerene layer.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: May 21, 2013
    Assignees: Panasonic Corporation, Cambridge Display Technology Ltd.
    Inventors: Kenji Okumoto, Jeremy Burroughes, Julian Carter
  • Patent number: 8421065
    Abstract: An organic electroluminescent display device which satisfies all of chromatic purity, transmission factor, reduction in reflection, and reflected color in balance at low cost is provided. An organic electroluminescent (EL) display device includes: a main substrate; an organic light-emitting layer formed above the main substrate and including a red light-emitting layer which emits red light, a green light-emitting layer which emits green light, a blue light-emitting layer which emits blue light, and a bank which is a non-light emitting region; a first light-adjusting layer formed above the blue light-emitting layer and the bank, which selectively transmits the blue light and selectively absorbs the green light and the red light; and a second light-adjusting layer formed above the red light-emitting layer and the green light-emitting layer, which selectively absorbs the blue light and selectively transmits the green light and the red light.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: April 16, 2013
    Assignee: Panasonic Corporation
    Inventors: Kenji Okumoto, Masafumi Matsui, Kouhei Koresawa
  • Patent number: 8362473
    Abstract: A manufacturing method of an organic EL device, comprising: providing a substrate on which a pixel electrode is arranged, forming a liquid repellent organic film on the substrate and the pixel electrode, radiating a light selectively to an area of the pixel electrode to be coated with an organic functional layer, to oxidize a surface of the pixel electrode, and to change the liquid repellent organic film on the area to a lyophilic organic film or to remove the liquid repellent organic film on the area, applying an ink containing an organic functional material on the area defined by the liquid repellent organic film to form the organic functional layer on the pixel electrode.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: January 29, 2013
    Assignee: Panasonic Corporation
    Inventors: Shuhei Nakatani, Kenji Okumoto, Kiyohiko Takagi
  • Publication number: 20130009134
    Abstract: Provided is an organic EL device comprising: an organic EL element including an anode 114, an organic EL layer 116, and a cathode 117; a wiring layer 106 that supplies power to the anode 114; and an organic layer 111 interposed between the anode 114 and the wiring layer 106, wherein the organic layer 111 includes (i) a first organic layer 112 including an azatriphenylene derivative and (ii) a second organic layer 113 including an amine-based compound, the first organic layer 112 being layered on the wiring layer 106, and the second organic layer 113 being layered on the first organic layer 112.
    Type: Application
    Filed: May 3, 2012
    Publication date: January 10, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Masaomi SHIBATA, Kenji OKUMOTO, Kouhei KORESAWA
  • Patent number: 8334529
    Abstract: The organic electroluminescence element includes an anode metal layer above a substrate. The anode metal layer comprises an inner region and an outer region. The inner region is adjacent to and different than the outer region. An upper surface of the inner region is lower than an upper surface of the outer region. A metal oxide layer is on the inner region of the metal anode layer. A hole transport layer is above the metal oxide layer and the inner region. The hole transport layer comprises a hole-transporting organic material. An organic luminescent layer is above the hole transport layer and the inner region. A cathode layer is above the organic luminescent layer and the inner region. The cathode layer injects electrons into the organic luminescent layer. An insulating layer is above the outer region of the anode metal layer.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: December 18, 2012
    Assignee: Panasonic Corporation
    Inventors: Kenji Okumoto, Hidehiro Yoshida
  • Patent number: 8324617
    Abstract: The organic electroluminescence element includes a substrate and an anode metal layer above the substrate. The anode metal layer includes an inner region between a pair of outer regions. A metal oxide layer is above the inner region and the outer regions of the anode metal layer. An insulating layer is above the metal oxide layer and the outer regions of the anode metal layer. A hole transport layer is above the metal oxide layer and the inner region of the anode metal layer. An organic luminescent layer is above the hole transport layer. A cathode layer is above the organic luminescent layer for injecting electrons into the organic luminescent layer. A thickness of the metal oxide layer on the inner region of the anode metal layer is greater than a thickness of the metal oxide layer on the outer regions of the anode metal layer.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: December 4, 2012
    Assignee: Panasonic Corporation
    Inventors: Kenji Okumoto, Hidehiro Yoshida
  • Patent number: 8304986
    Abstract: Disclosed is an organic EL display panel which includes: a substrate; a plurality of linear luminescent regions formed on the substrate, the luminescent regions running in parallel to one another; and two or more sub-pixels arranged in a row in each of the luminescent regions; wherein the luminescent regions include a luminescent region having the sub-pixels emitting red light, a luminescent region having the sub-pixels emitting green light, and a luminescent region having the sub-pixels emitting blue light, each of the sub-pixels includes a pixel electrode disposed on the substrate, an organic functional layer disposed on the pixel electrode by coating, a counter electrode disposed on the organic functional layer, and a forward tapered bank which constitutes wall surfaces of a region in which the organic functional layer is formed, and when an inclination angle of the wall surface of the region on the substrate edge side is defined as inclination angle ?, and an inclination angle of the wall surface of the r
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: November 6, 2012
    Assignee: Panasonic Corporation
    Inventors: Hidehiro Yoshida, Kenji Okumoto
  • Patent number: 8289242
    Abstract: An organic electroluminescence display includes a first electrode and an auxiliary wire each either on or in a substrate. A luminescent layer is over the first electrode, and a hole transport layer is between the luminescent layer and the first electrode. The hole transport layer extends from over the first electrode to over the auxiliary wire. A second electrode is over the luminescent layer and extends from over the first electrode to over the auxiliary wire. A metal layer is over the auxiliary wire between the hole transport layer and the second electrode. The second electrode and the auxiliary wire are electrically connected via the hole transport layer and the metal layer. The metal layer comprises a metal, wherein a difference of a work function value of the metal minus an absolute value of an energy level of a lowest unoccupied molecular orbit of the hole transport layer is at most approximately 0.5 eV.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: October 16, 2012
    Assignee: Panasonic Corporation
    Inventor: Kenji Okumoto
  • Patent number: 8278804
    Abstract: A multicolor light-emitting organic electroluminescent (EL) display device including a plurality of organic EL light-emitting regions including a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer on a main substrate includes: a magenta color filter, as a first light-adjusting layer, having predetermined transmission property for blue light and red light; and a second light-adjusting layer having predetermined absorption property for light with a wavelength intermediate between the red light and green light, wherein the magenta color filter is laid over the blue light-emitting layer, the red light-emitting layer, and a bank which is a non light-emitting region, and the second light-adjusting layer is laid over the blue light-emitting layer, the green light-emitting layer, the red light-emitting layer, and the bank which is the non light-emitting region.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: October 2, 2012
    Assignee: Panasonic Corporation
    Inventors: Masafumi Matsui, Kouhei Koresawa, Takashi Ohta, Kenji Okumoto