Patents by Inventor Yotaro Shiraishi

Yotaro Shiraishi 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: 20170301874
    Abstract: Provided is a narrow-frame organic EL panel for suppressing unevenness in the brightness of light emission. The present invention involves positioning the following on a translucent support substrate: a translucent first electrode to which power is supplied from an external power source via common wiring, a second electrode for forming a pair with the first electrode, and an organic EL element in which an organic layer having at least a light-emitting layer is sandwiched between the first electrode and the second electrode. In addition, a sealing member is positioned so as to cover the organic EL element in an airtight manner, an auxiliary electrode having a lower specific resistance than that of the first electrode is formed on the first electrode, a groove is provided in at least a section of the sealing member, and an auxiliary conductive part comprising a conductive material is positioned in the groove.
    Type: Application
    Filed: September 18, 2015
    Publication date: October 19, 2017
    Inventors: Toyoyasu TADOKORO, Yotaro SHIRAISHI, Takashi IKEDA
  • Patent number: 7135816
    Abstract: A color conversion filter substrate includes a transparent support substrate, one or more types of color conversion layers with a thickness more than 5 ?m formed on the support substrate in a desired pattern, and a protective layer formed of a transparent material for covering the support substrate and the color conversion layers and having a flat surface. After a display is produced, the color conversion pattern layers contain unsaturated functional groups at a concentration equal to or less than 1.4×10?3 mol/g.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: November 14, 2006
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Koji Kawaguchi, Yotaro Shiraishi, Yukinori Kawamura
  • Patent number: 6956323
    Abstract: A color conversion filter substrate includes a transparent support substrate, at least one color conversion filter layer formed of a resin film containing a fluorescence colorant with a thickness of at least 5 ?m and arranged on the support substrate in a desired pattern, and a transparent gas-barrier layer formed in a flat film for covering the color conversion layer. The gas-barrier layer has a water-vapor permeability of 1.0 g/m2·24 hr or less, and a portion covering the color conversion filter layer with a thickness tPL expressed by the following equation, 0<tPL<0.1 W wherein W is a minimum width of a pixel.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: October 18, 2005
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Koji Kawaguchi, Yotaro Shiraishi, Yukinori Kawamura
  • Publication number: 20040164672
    Abstract: A color conversion filter substrate includes a transparent support substrate, one or more types of color conversion layers with a thickness more than 5 &mgr;m formed on the support substrate in a desired pattern, and a protective layer formed of a transparent material for covering the support substrate and the color conversion layers and having a flat surface. After a display is produced, the color conversion pattern layers contain unsaturated functional groups at a concentration equal to or less than 1.4×10−3 mol/g.
    Type: Application
    Filed: February 20, 2003
    Publication date: August 26, 2004
    Inventors: Koji Kawaguchi, Yotaro Shiraishi, Yukinori Kawamura
  • Publication number: 20040164669
    Abstract: A color conversion filter substrate includes a transparent support substrate, at least one color conversion filter layer formed of a resin film containing a fluorescence colorant with a thickness of at least 5 &mgr;m and arranged on the support substrate in a desired pattern, and a transparent gas-barrier layer formed in a flat film for covering the color conversion layer. The gasbarrier layer has a water-vapor permeability of 1.
    Type: Application
    Filed: February 20, 2003
    Publication date: August 26, 2004
    Inventors: Koji Kawaguchi, Yotaro Shiraishi, Yukinori Kawamura
  • Patent number: 6653778
    Abstract: A high boiling-point solvent, included in a fluorescent color conversion film, suppresses degradation in color conversion characteristic by compensating for a decrease in dielectric constant due to solidification of the matrix system. The fluorescent color conversion film of the present invention includes, in addition to the high boiling point solvent, organic fluorescent dyes, which absorb light in a near ultraviolet to visible light region and emit visible light of a different wavelength, and a matrix resin bearing the organic fluorescent dye. The high boiling point solvent has a boiling point of 150° C. or higher and a vapor pressure of 5 mmHg or lower at the temperature of 20° C. The fluorescent color conversion film is useful in a fluorescent color conversion filter, which itself is useful in light-emitting devices, such as self-emitting multi-colored- or full colored-displays, display panels and backlights.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: November 25, 2003
    Assignee: Fuji Electric Co., LTD.
    Inventors: Yoshimasa Tomiuchi, Yotaro Shiraishi
  • Patent number: 6589672
    Abstract: A blue color filter is provided, having high transmittance for the color blue and low transmittance for the color green. An organic electroluminescent device is provided having excellent blue color purity. The blue color filter according to the invention includes a photosensitive resin; and a dye containing a cyanine dye described by the following structural formula (I): The organic EL device includes a blue color filter made with cyanine dye having the structural formula (I), a glass substrate, an organic protection layer, an inorganic oxide layer, and an organic light-emitting layer including an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron injection layer and a cathode.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: July 8, 2003
    Assignee: Fuji Electric Co., LTD
    Inventors: Ryoji Kobayashi, Yotaro Shiraishi, Koji Kawaguchi
  • Patent number: 6506506
    Abstract: A fluorescent color conversion film has an organic fluorescent dye, which absorbs light obtained from a light-emitting element in the near ultraviolet to the visible range and emits a visible light of a different wavelength, and a matrix resin, which bears the organic fluorescent dye. The organic dye is an immobilized organic fluorescent dye enclosed by a cyclodextrin derivative represented by general formula (I), wherein n is an integer from 4 to 10, each of R1-R5 are selected independently from the group consisting of a hydrogen atom, a carboxyl group, a hydroxyl group, and a C1-C6 alkyl group. An organic light-emitting device equipped with this fluorescent color conversion film suppresses the decomposition and quenching of the fluorescent dye from attacks by radicals generated from the polymerization initiators in photolithography and/or growth radicals of reactive multifunctional monomers.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: January 14, 2003
    Assignee: Fuji Electronic Co., Ltd.
    Inventors: Yoshimasa Tomiuchi, Yotaro Shiraishi
  • Patent number: 6454966
    Abstract: A fluorescent conversion filter converts the light in the region between near-ultraviolet and blue to green light and emits the green light with a high color purity, and to provide an organic light emitting element including such a fluorescent conversion filter. The fluorescent conversion filter contains, in a matrix resin, a fluorescent converter material, selected from a fluorescent dye, a fluorescent pigment and a mixture of a fluorescent dye and a fluorescent pigment, that absorbs light in the wavelength region between near-ultraviolet and blue and emits green light, and a light absorbing dye. The fluorescent converter material, that has an absorption band in the wavelength region between 450 and 500 nm, is contained in the fluorescent conversion filter at a mixing ratio, at that the light absorbance of the fluorescent conversion filter is one or more in the wavelength region between 450 and 500 nm.
    Type: Grant
    Filed: August 7, 2000
    Date of Patent: September 24, 2002
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Ryoji Kobayashi, Yotaro Shiraishi, Koji Kawaguchi
  • Patent number: 6358652
    Abstract: A fluorescent conversion filter suppresses decomposition and quenching of fluorescent dyes or pigments. An organic light-emitting device may be equipped with such a fluorescent conversion filter. The fluorescent conversion filter is formed by coating with a coating material, followed by patterning by photolithography. The coating material consists of a mixture of organic fluorescent dye or pigment that absorbs light in the ultraviolet to visible light region. The coating also includes a photo-setting or photo-and-thermo-setting resin containing a photopolymerizaion initiator of a hydrogen abstraction type having a benzophenone skeleton within the molecule. As a result, an organic light-emitting device is produced by combining the a fluorescent conversion filter with an organic light-emitting element.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: March 19, 2002
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yoshimasa Tomiuchi, Ryoji Kobayashi, Yotaro Shiraishi
  • Patent number: 6179923
    Abstract: A deposition apparatus is used for depositing a layer of an organic thin-film light-emitting element on a substrate. The apparatus is formed of a vacuum chamber for depositing the layer for constituting the organic thin-film light-emitting element on the substrate, a set of parts disposed in the vacuum chamber for depositing the layer on the substrate and including a source for the layer, and a supporting member for supporting the set of parts so that the set of parts is replaceably disposed in the chamber. A dust of a material disposed in the source and evaporated therefrom is adhered to the set of parts, but the set of parts can be replaced easily. Thus, the apparatus can be operated efficiently.
    Type: Grant
    Filed: August 18, 1998
    Date of Patent: January 30, 2001
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Tetsuya Yamamoto, Yotaro Shiraishi, Takao Maeda
  • Patent number: 6133581
    Abstract: An organic light-emitting device is formed of a transparent substrate, anodes in a stripe pattern formed on the transparent substrate, an organic film layer formed on the anodes, and cathodes formed on the organic film layer. Each of the anode includes a first conductor formed of a transparent and electrically conductive film containing a metal oxide as a main component, and a second conductor extending along the first conductor. The second conductor is formed of metal with a resistivity of 1/10 or less than a resistivity of a constituent material of the first conductor. Thus, the organic light-emitting device emits light efficiently with a low power consumption.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: October 17, 2000
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yutaka Terao, Yotaro Shiraishi, Makoto Utsumi
  • Patent number: 6104363
    Abstract: In a method for driving an organic light-emitting display element, the element has a reduced possibility of sticking and a long life without reducing the brightness. In the method for driving a display element having the organic light-emitting element emitting light by a current passing through the organic thin film, a voltage VC applied to the cathode of the organic light-emitting element and a voltage VA applied to the anode of the organic light-emitting element are applied to each surface of the organic thin film through two lines that cross each other. Also, the display of the pixel in the intersection of the two lines is controlled by electric signals through the two lines. During a period of time in which each pixel is unlighted, a recovery voltage within a specified range is applied to the pixel for a specified period of time or longer.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: August 15, 2000
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Makoto Kobayashi, Haruo Kawakami, Yotaro Shiraishi
  • Patent number: 5949194
    Abstract: A method to drive a display-element reduces the possibility of a sticking screen and ensures a high-quality display. A current flowing through each of the pixels constituting a display element is controlled so as to be maintained at a value required for a display operation.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: September 7, 1999
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Haruo Kawakami, Yotaro Shiraishi, Makoto Kobayashi