Patents by Inventor Yuichiro Itai

Yuichiro Itai 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: 20130334506
    Abstract: It is an object of the present invention to provide an organic electroluminescent element with which no light extraction layer needs to be produced separately, which has a transparent electrode that is advantageous in terms of cost and a simple film formation process, and which is excellent from the standpoint of light extraction efficiency. The present invention provides an organic electroluminescent element in which a substrate, a first electrode adjacent to this substrate, an organic layer including at least one organic light-emitting layer, and a second electrode adjacent to this organic layer are formed in this order, with this organic electroluminescent element being such that at least one of the aforementioned electrodes is a transparent electrode which is transparent, which contains at least one type of light scattering particles that are transparent and that have a primary particle size of at least 0.
    Type: Application
    Filed: May 20, 2013
    Publication date: December 19, 2013
    Applicant: UDC IRELAND LIMITED
    Inventors: Manabu Tobise, Yuichiro Itai, Kana Morohashi, Shin'ichiro Sonoda, Shizunami Ri
  • Publication number: 20130320310
    Abstract: An organic electroluminescent element comprising: a substrate; a pair of electrodes including an anode and a cathode, disposed on the substrate; and at least one organic layer including a light emitting layer, disposed between the electrodes. At least one of the organic layer contains a compound of general formula (1): A-(B)n-D, wherein A, D, and B represent groups of the following general formulas (2), (3), and (4) respectively; n represents 0 or 1; and when n is 0, A and D are not symmetrical about a point to each other, including the binding sites: wherein XA1 to XA11, XD1 to XD11, and XB1 to XB11 are as defined in the specification.
    Type: Application
    Filed: February 26, 2013
    Publication date: December 5, 2013
    Applicant: UDC Ireland Limited
    Inventors: Yosuke Yamamoto, Kousuke Watanabe, Yuichiro Itai
  • Patent number: 8188480
    Abstract: A TFT is provided which includes, on a substrate, at least a gate electrode, a gate insulating layer, an active layer containing an amorphous oxide semiconductor, a source electrode and a drain electrode, wherein a resistance layer containing an amorphous oxide and having a thickness of more than 3 nm is disposed between the active layer and at least one of the source electrode or the drain electrode, and a band gap of the active layer is smaller than a band gap of the resistance layer. Also, a display using the TFT is provided.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: May 29, 2012
    Assignee: FUJIFILM Corporation
    Inventor: Yuichiro Itai
  • Patent number: 8030845
    Abstract: The invention provides a method for manufacturing an organic electroluminescence device having a first flexible plate and a second flexible plate and an organic electroluminescence element provided on a portion at approximately the center of at least one of the flexible plates. The method includes: forming the first flexible plate having a S region which has larger UV light transmittance and a W region which has larger UV light transmittance; forming a substantially frame-shaped UV-curable resin layer on the first flexible plate and/or the second flexible plate so that the UV-curable resin layer overlaps at least partially with the S region; and adhering the first flexible plate with the second flexible plate by irradiation of UV light which uses the S region as an irradiation face so as to cure the UV-curable resin layer. The invention further provides an organic electroluminescence device formed by the method.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: October 4, 2011
    Assignee: Fujifilm Corporation
    Inventor: Yuichiro Itai
  • Patent number: 8017254
    Abstract: An organic electroluminescence device of multi-photon emission mode which includes plural light emission layers and at least one charge generation layer between a pair of electrodes, arranged in a film thickness direction thereof, wherein the charge generation layer includes at least one p-doped layer and at least one n-doped layer, and further includes an alkali metal layer and a layer containing a hole transport material between the p-doped layer and the n-doped layer. An organic electroluminescence device of multi-photon emission mode exhibiting little unevenness in luminance even in a large-area format electroluminescence device is provided.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: September 13, 2011
    Assignee: Fujifilm Corporation
    Inventor: Yuichiro Itai
  • Patent number: 7994579
    Abstract: The present invention provides a thin film field-effect transistor comprising a substrate having thereon at least a gate electrode, a gate insulating film, an active layer, a source electrode, and a drain electrode, wherein the active layer is an oxide semiconductor layer, a resistance layer having an electric conductivity that is lower than an electric conductivity of the active layer is provided between the active layer and at least one of the source electrode or the drain electrode, and an intermediate layer comprising an oxide comprising an element having a stronger bonding force with respect to oxygen than that of the oxide semiconductor in the active layer is provided between the active layer and the resistance layer.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: August 9, 2011
    Assignee: FUJIFILM Corporation
    Inventor: Yuichiro Itai
  • Patent number: 7968904
    Abstract: There is provided an organic electroluminescence device that is high in light emitting efficiency and excellent in driving durability, which contains at least a light emitting layer between an anode and a cathode opposing each other, and further has either 1) an organic layer containing at least a first acceptor and a second acceptor between the light emitting layer and the anode, in which the first acceptor is a metal compound and the second acceptor is an organic compound which does not contain a metal, or 2) an organic layer containing a metal oxide as an acceptor between the light emitting layer and the anode, in which a concentration of the metal oxide in the organic layer is varied in a thickness direction and the concentration is lower in a portion near the light emitting layer than a portion near the anode.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: June 28, 2011
    Assignee: Fujifilm Corporation
    Inventor: Yuichiro Itai
  • Patent number: 7943226
    Abstract: An organic EL panel including: a substrate; an organic EL device including an anode, an organic EL layer and a cathode layered on the substrate; and a sealing member for sealing the organic EL device on the substrate, and further including a drying agent layer that contacts the organic EL device, and a heat generating layer that contacts the drying agent layer.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: May 17, 2011
    Assignee: Fujifilm Corporation
    Inventor: Yuichiro Itai
  • Patent number: 7935433
    Abstract: An object of the present invention is to enable suppression of a leak current of an organic EL element while improving a conductivity of the organic EL element and suppressing an operation voltage thereof. An organic EL element is used which comprises at least a luminescent layer, a hole transport layer adjacent to a positive-electrode side of the luminescent layer, and an electron injection transport layer adjacent to a negative-electrode side of the luminescent layer, wherein a hole injection layer is provided between the hole transport layer and the positive electrode, and the conductivity of the hole injection layer continuously changes along a thickness direction of the hole injection layer.
    Type: Grant
    Filed: December 25, 2003
    Date of Patent: May 3, 2011
    Assignee: Fujifilm Corporation
    Inventors: Yuichiro Itai, Tasuku Satoh, Yoshiaki Sakamoto, Toshiro Takahashi, Masaru Kinoshita
  • Patent number: 7871711
    Abstract: The invention relates to an organic EL element having a glass substrate and an anode, a hole-injecting layer, a hole-transport layer, a blue light-emitting layer, a hole-blocking layer, an electron-transport layer, and a cathode formed on the glass substrate sequentially in that order, wherein the electron-transport layer contains an electron-transporting material and a light-emitting material having emission-spectrum peak wavelength of longer than 555 nm, and the light-emitting material consumes the holes, thereby preventing degradation of the electron-transporting material, improving blue chromaticity, and elongating the life of the organic EL element.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: January 18, 2011
    Assignee: Fujifilm Corporation
    Inventor: Yuichiro Itai
  • Publication number: 20100216269
    Abstract: There is provided an organic EL element having, between a positive electrode and a negative electrode, a lamination structure formed of organic films having a light emitting layer, a hole transport layer adjacent to a positive electrode side of the light emitting layer, and an electron transport layer adjacent to a negative electrode side of the light emitting layer. At least one of the organic films composing the lamination structure includes a metal element having reactivity to oxygen or water.
    Type: Application
    Filed: April 30, 2010
    Publication date: August 26, 2010
    Inventors: Yuichiro ITAI, Masaya NAKAYAMA
  • Patent number: 7737632
    Abstract: There is provided an organic EL element having, between a positive electrode and a negative electrode, a lamination structure formed of organic films having a light emitting layer, a hole transport layer adjacent to a positive electrode side of the light emitting layer, and an electron transport layer adjacent to a negative electrode side of the light emitting layer. At least one of the organic films composing the lamination structure includes a metal element having reactivity to oxygen or water.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: June 15, 2010
    Assignee: FUJIFILM Corporation
    Inventors: Yuichiro Itai, Masaya Nakayama
  • Publication number: 20100059746
    Abstract: The present invention provides a thin film field-effect transistor comprising a substrate having thereon at least a gate electrode, a gate insulating film, an active layer, a source electrode, and a drain electrode, wherein the active layer is an oxide semiconductor layer, a resistance layer having an electric conductivity that is lower than an electric conductivity of the active layer is provided between the active layer and at least one of the source electrode or the drain electrode, and an intermediate layer comprising an oxide comprising an element having a stronger bonding force with respect to oxygen than that of the oxide semiconductor in the active layer is provided between the active layer and the resistance layer.
    Type: Application
    Filed: August 24, 2009
    Publication date: March 11, 2010
    Applicant: FUJIFILM CORPORATION
    Inventor: Yuichiro Itai
  • Publication number: 20090236596
    Abstract: A TFT is provided which includes, on a substrate, at least a gate electrode, a gate insulating layer, an active layer containing an amorphous oxide semiconductor, a source electrode and a drain electrode, wherein a resistance layer containing an amorphous oxide and having a thickness of more than 3 nm is disposed between the active layer and at least one of the source electrode or the drain electrode, and a band gap of the active layer is smaller than a band gap of the resistance layer. Also, a display using the TFT is provided.
    Type: Application
    Filed: March 4, 2009
    Publication date: September 24, 2009
    Applicant: FUJIFILM CORPORATION
    Inventor: Yuichiro Itai
  • Patent number: 7449832
    Abstract: An organic electroluminescence device is disclosed. The device includes an anode, a cathode formed above the anode, a light-emitting layer containing an organic light-emitting material that is formed between the anode and the cathode, a hole-injecting layer on the anode that includes a hole-transporting material and an acceptor, and an electron-transporting suppressing stack between the hole-injecting layer and the light-emitting layer. The electron-transporting suppressing stack consists of multiple carrier-transporting layers, and forms energy barriers relative to electrons flowing from the light-emitting layer to the hole-injecting layer.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: November 11, 2008
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yuichiro Itai
  • Publication number: 20080241471
    Abstract: An organic EL panel including: a substrate; an organic EL device including an anode, an organic EL layer and a cathode layered on the substrate; and a sealing member for sealing the organic EL device on the substrate, and further including a drying agent layer that contacts the organic EL device, and a heat generating layer that contacts the drying agent layer.
    Type: Application
    Filed: March 17, 2008
    Publication date: October 2, 2008
    Inventor: Yuichiro Itai
  • Publication number: 20080074042
    Abstract: The invention provides a method for manufacturing an organic electroluminescence device having a first flexible plate and a second flexible plate and an organic electroluminescence element provided on a portion at approximately the center of at least one of the flexible plates. The method includes: forming the first flexible plate having a S region which has larger UV light transmittance and a W region which has larger UV light transmittance; forming a substantially frame-shaped UV-curable resin layer on the first flexible plate and/or the second flexible plate so that the UV-curable resin layer overlaps at least partially with the S region; and adhering the first flexible plate with the second flexible plate by irradiation of UV light which uses the S region as an irradiation face so as to cure the UV-curable resin layer. The invention further provides an organic electroluminescence device formed by the method.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 27, 2008
    Inventor: Yuichiro Itai
  • Publication number: 20080038583
    Abstract: An object of the present invention is to enable suppression of a leak current of an organic EL element while improving a conductivity of the organic EL element and suppressing an operation voltage thereof. An organic EL element is used which comprises at least a luminescent layer, a hole transport layer adjacent to a positive-electrode side of the luminescent layer, and an electron injection transport layer adjacent to a negative-electrode side of the luminescent layer, wherein a hole injection layer is provided between the hole transport layer and the positive electrode, and the conductivity of the hole injection layer continuously changes along a thickness direction of the hole injection layer.
    Type: Application
    Filed: December 25, 2003
    Publication date: February 14, 2008
    Inventors: Yuichiro Itai, Tasuku Satoh, Yoshiaki Sakamoto, Toshiro Takahashi, Masaru Kinoshita
  • Publication number: 20070285005
    Abstract: The invention relates to an organic EL element having a glass substrate and an anode, a hole-injecting layer, a hole-transport layer, a blue light-emitting layer, a hole-blocking layer, an electron-transport layer, and a cathode formed on the glass substrate sequentially in that order, wherein the electron-transport layer contains an electron-transporting material and a light-emitting material having emission-spectrum peak wavelength of longer than 555 nm, and the light-emitting material consumes the holes, thereby preventing degradation of the electron-transporting material, improving blue chromaticity, and elongating the life of the organic EL element.
    Type: Application
    Filed: March 31, 2004
    Publication date: December 13, 2007
    Applicant: Fuji Photo Film., Ltd.
    Inventor: Yuichiro Itai
  • Publication number: 20070231597
    Abstract: There is provided an organic EL element having, between a positive electrode and a negative electrode, a lamination structure formed of organic films having a light emitting layer, a hole transport layer adjacent to a positive electrode side of the light emitting layer, and an electron transport layer adjacent to a negative electrode side of the light emitting layer. At least one of the organic films composing the lamination structure includes a metal element having reactivity to oxygen or water.
    Type: Application
    Filed: April 27, 2004
    Publication date: October 4, 2007
    Inventors: Yuichiro Itai, Masaya Nakayama