Patents by Inventor Masuyuki Oota

Masuyuki Oota 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: 8716057
    Abstract: An organic EL display device includes a pixel electrode which is disposed in each of first to third organic EL elements, a first light emission layer which includes a first dopant material having a first absorbance peak, the first light emission layer extending over the first to third organic EL elements and being disposed above the pixel electrode, a second light emission layer which includes a second dopant material having a second absorbance peak and is disposed above the first light emission layer, a third light emission layer which is disposed above the second light emission layer, a counter-electrode which is disposed above the third light emission layer, and a hole transport layer which is formed of a material having an absorbance bottom on a shorter wavelength side than the first absorbance peak and the second absorbance peak in absorbance spectrum characteristics of the hole transport layer.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: May 6, 2014
    Assignee: Japan Display Inc.
    Inventors: Shuhei Yokoyama, Masuyuki Oota
  • Patent number: 8513656
    Abstract: According to one embodiment, an organic EL device includes a first organic EL element, a second organic EL element and a third organic EL element. The first organic EL element has a first electrode, a second electrode, and a first emitting layer. The second organic EL element has a third electrode, a fourth electrode, and a second emitting layer. At least a part of the first emitting layer extends on the second emitting layer. A third organic EL element has a fifth electrode, a sixth electrode, and a third emitting layer. At least a part of the first and the second emitting layers extends on the third emitting layer. A thickness of the first emitting layer between the first and the second electrodes is thicker than a thickness of the first emitting layer extending on the second and the third emitting layers.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: August 20, 2013
    Assignee: Japan Display Central Inc.
    Inventors: Satoshi Okutani, Norihisa Maeda, Masashi Takahashi, Takeshi Ikeda, Masuyuki Oota
  • Patent number: 8461577
    Abstract: According to one embodiment, an organic EL device includes an insulating substrate, first and second interlayer insulators, pixel electrodes, an organic layer, and a counter electrode. The first interlayer insulator is positioned above the insulating substrate. The second interlayer insulator is positioned on the first interlayer insulator and provided with slits. The pixel electrodes are arranged on the second interlayer insulator. Two or more of the pixels are adjacent to each other with one of regions corresponding to the slits interposed therebetween. The organic layer is positioned on the pixel electrodes and includes an emitting layer. The counter electrode is positioned above the organic layer.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: June 11, 2013
    Assignee: Japan Display Central Inc.
    Inventors: Shiro Sumita, Shuhei Yokoyama, Masuyuki Oota
  • Patent number: 8358057
    Abstract: An organic EL display includes an array of electrodes including first and second electrodes, a counter electrode, and an organic layer including a first emitting layer interposed between the array of electrodes and the counter electrode and a second emitting layer interposed between the first emitting layer and the counter electrode. Each of the first and second emitting layers is a continuous layer extending over a display region. Portions of a laminate including the array of electrodes, the organic layer and the counter electrode that correspond to the first and second electrodes form first and second organic EL elements different in luminous colors from each other.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: January 22, 2013
    Assignee: Japan Display Central Inc.
    Inventor: Masuyuki Oota
  • Patent number: 8283854
    Abstract: An organic EL display device includes a first light emission layer which includes a first dopant material having a first absorbance peak in absorbance spectrum characteristics and a first host material having a first absorbance bottom on a shorter wavelength side than the first absorbance peak, the first light emission layer extending over the first to third organic EL elements and being disposed above pixel electrodes of the first to third organic EL elements, and a second light emission layer which includes a second dopant material having a second absorbance peak in absorbance spectrum characteristics and a second host material having a second absorbance bottom on a shorter wavelength side than the first absorbance peak and than the second absorbance peak, the second light emission layer extending over the first to third organic EL elements and being disposed above the first light emission layer.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: October 9, 2012
    Assignee: Japan Display Central Inc.
    Inventors: Shuhei Yokoyama, Masuyuki Oota, Satoshi Okutani, Takanobu Takenaka
  • Patent number: 8237636
    Abstract: A method of adjusting color balance includes writing first to third adjustment video signals on first to third pixels, respectively to obtain first to third monochromatic data, updating the first to third adjustment video signals based on the first to third monochromatic data, writing the updated first to third adjustment video signals on the first to third pixels to obtain a mixed color data, updating the first to third adjustment video signals in the case where the mixed color data is within a tolerance and the power consumption exceeds a predetermined upper limit, and setting the first to third adjustment video signals updated finally as the maximum values of the video signals to be written on the first to third pixels, respectively.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: August 7, 2012
    Assignee: Japan Display Central Inc.
    Inventors: Masuyuki Oota, Fumihiro Matsumoto
  • Publication number: 20120107986
    Abstract: An organic EL display device includes a pixel electrode which is disposed in each of first to third organic EL elements, a first light emission layer which includes a first dopant material having a first absorbance peak, the first light emission layer extending over the first to third organic EL elements and being disposed above the pixel electrode, a second light emission layer which includes a second dopant material having a second absorbance peak and is disposed above the first light emission layer, a third light emission layer which is disposed above the second light emission layer, a counter-electrode which is disposed above the third light emission layer, and a hole transport layer which is formed of a material having an absorbance bottom on a shorter wavelength side than the first absorbance peak and the second absorbance peak in absorbance spectrum characteristics of the hole transport layer.
    Type: Application
    Filed: January 10, 2012
    Publication date: May 3, 2012
    Inventors: Shuhei YOKOYAMA, Masuyuki Oota
  • Publication number: 20120081495
    Abstract: According to one embodiment, an organic EL device includes a substrate, a first translucent insulating film, a second translucent insulating film, a first electrode, a second electrode, and an emitting layer. The substrate has a first index of refraction. The first translucent insulating film is on the substrate, and the first insulating film has a second index of refraction higher than the first index of refraction. The second translucent insulating film is on the first insulating film, and the second insulating film has a third index of refraction lower than the second index of refraction. The first electrode is on the second insulating film, and the first electrode has a fourth index of refraction higher than the third index of refraction. The second electrode is facing the first electrode. The emitting layer is between the first electrode and the second electrode.
    Type: Application
    Filed: May 31, 2011
    Publication date: April 5, 2012
    Applicant: Toshiba Mobile Display Co., Ltd.
    Inventors: Hirofumi Kubota, Satoshi Okutani, Masuyuki Oota
  • Publication number: 20120045856
    Abstract: According to one embodiment, a method of manufacturing an organic EL device is disclosed. The method can arrange an adhesive agent of an ultraviolet curable type between a first substrate on which a plurality of light emitting parts are formed in a predetermined direction and a second substrate arranged to face the first substrate separately so as to surround the light emitting parts. Each of the light emitting parts comprises a plurality of organic EL elements. The method can form a substrate pair by exposing the adhesive agent to ultraviolet rays to bond the first substrate and the second substrate to each other with the adhesive agent. The method can place the substrate pair on a first holding member capable of holding an entire surface of the first substrate or the second substrate.
    Type: Application
    Filed: May 31, 2011
    Publication date: February 23, 2012
    Applicant: Toshiba Mobile Display Co., Ltd.
    Inventors: Shiro SUMITA, Atsushi Hosoda, Tetsuo Ishida, Masuyuki Oota
  • Patent number: 8110826
    Abstract: An organic EL display device includes a pixel electrode which is disposed in each of first to third organic EL elements, a first light emission layer which includes a first dopant material having a first absorbance peak, the first light emission layer extending over the first to third organic EL elements and being disposed above the pixel electrode, a second light emission layer which includes a second dopant material having a second absorbance peak and is disposed above the first light emission layer, a third light emission layer which is disposed above the second light emission layer, a counter-electrode which is disposed above the third light emission layer, and a hole transport layer which is formed of a material having an absorbance bottom on a shorter wavelength side than the first absorbance peak and the second absorbance peak in absorbance spectrum characteristics of the hole transport layer.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: February 7, 2012
    Assignee: Toshiba Mobile Display Co., Ltd.
    Inventors: Shuhei Yokoyama, Masuyuki Oota
  • Publication number: 20120026270
    Abstract: According to one embodiment, an organic EL device includes a first substrate, a second substrate, an adhesive agent, and a drying agent. An organic EL element is formed on the first substrate. The second substrate has a first surface facing the first substrate and a second surface on an opposite side from the first surface. A concave portion having a bottom portion and a sidewall portion is formed on the first surface. The adhesive agent is surrounding the organic EL element. The adhesive agent is configured to join the first substrate and the second substrate to each other. The drying agent is applied to at least a part of the bottom portion and the sidewall portion of the concave portion.
    Type: Application
    Filed: May 31, 2011
    Publication date: February 2, 2012
    Applicant: Toshiba Mobile Display Co., Ltd.
    Inventors: Shiro Sumita, Motonobu Aoki, Masuyuki Oota
  • Patent number: 8094110
    Abstract: A plurality of pixel units are arranged in a matrix, each pixel unit including a display element and a pixel circuit which supplies a driving current to the display element. Each pixel circuit includes a first memory section which stores, in a write period of the pixel unit, a first driving current corresponding to a first signal current and then outputs the stored first driving current, and further stores a second driving current corresponding to a second signal current, and a second memory section which stores the first driving current output from the first memory section in the write period of the pixel unit. The pixel circuit outputs, in a light emission period of the pixel unit, a difference current between the second driving current stored in the first memory section and the first driving current stored in the second memory section to the display element as the driving current.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: January 10, 2012
    Assignee: Toshiba Matsuhita Display Technology Co., Ltd.
    Inventors: Kazuyoshi Omata, Masuyuki Oota, Yoshiro Aoki
  • Publication number: 20110315970
    Abstract: An organic EL display device includes a first organic EL element which emits light of a first color and a second organic EL element which emits light of a second color that differs from the first color, the first organic EL element and the second organic EL element being arranged on a substrate, wherein each of the first organic EL element and the second organic EL element includes a first electrode, a second electrode which is opposed to the first electrode, and an organic layer which is interposed between the first electrode and the second electrode, the organic layer of the first organic EL element and the organic layer of the second organic EL element are formed of an identical material, and a light emission function of the first color is substantially lost in the organic layer of the second organic EL element.
    Type: Application
    Filed: September 7, 2011
    Publication date: December 29, 2011
    Inventors: Shuhei Yokoyama, Masuyuki Oota
  • Publication number: 20110233576
    Abstract: According to one embodiment, an organic EL device includes a first organic EL element, a second organic EL element and a third organic EL element. The first organic EL element has a first electrode, a second electrode, and a first emitting layer. The second organic EL element has a third electrode, a fourth electrode, and a second emitting layer. At least a part of the first emitting layer extends on the second emitting layer. A third organic EL element has a fifth electrode, a sixth electrode, and a third emitting layer. At least a part of the first and the second emitting layers extends on the third emitting layer. A thickness of the first emitting layer between the first and the second electrodes is thicker than a thickness of the first emitting layer extending on the second and the third emitting layers.
    Type: Application
    Filed: January 31, 2011
    Publication date: September 29, 2011
    Applicant: Toshiba Mobile Display Co., Ltd.
    Inventors: Satoshi OKUTANI, Norihisa Maeda, Masashi Takahashi, Takeshi Ikeda, Masuyuki Oota
  • Publication number: 20110198630
    Abstract: According to one embodiment, an organic EL device includes an insulating substrate, first and second interlayer insulators, pixel electrodes, an organic layer, and a counter electrode. The first interlayer insulator is positioned above the insulating substrate. The second interlayer insulator is positioned on the first interlayer insulator and provided with slits. The pixel electrodes are arranged on the second interlayer insulator. Two or more of the pixels are adjacent to each other with one of regions corresponding to the slits interposed therebetween. The organic layer is positioned on the pixel electrodes and includes an emitting layer. The counter electrode is positioned above the organic layer.
    Type: Application
    Filed: February 11, 2011
    Publication date: August 18, 2011
    Inventors: Shiro SUMITA, Shuhei Yokoyama, Masuyuki Oota
  • Publication number: 20110148290
    Abstract: An organic EL display includes an array of electrodes including first and second electrodes, a counter electrode, and an organic layer including a first emitting layer interposed between the array of electrodes and the counter electrode and a second emitting layer interposed between the first emitting layer and the counter electrode. Each of the first and second emitting layers is a continuous layer extending over a display region. Portions of a laminate including the array of electrodes, the organic layer and the counter electrode that correspond to the first and second electrodes form first and second organic EL elements different in luminous colors from each other.
    Type: Application
    Filed: February 28, 2011
    Publication date: June 23, 2011
    Inventor: Masuyuki Oota
  • Publication number: 20110121719
    Abstract: According to one embodiment, an organic EL device includes an insulative substrate, a switching element above the insulative substrate, an insulation film above the switching element and includes a contact hole reaching the switching element, a pixel electrode above the insulation film and includes a contact portion extending into the contact hole and electrically connected to the switching element, an organic layer extending over the pixel electrode including the contact portion, and extending over the insulation film in a vicinity of the pixel electrode, and a counter-electrode above the organic layer.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 26, 2011
    Inventors: Shuhei Yokoyama, Shiro Sumita, Masuyuki Oota, Hiroshi Sano
  • Publication number: 20110108812
    Abstract: According to one embodiment, an organic EL device includes an insulating substrate, switching elements arranged two-dimensionally above the insulating substrate, an insulating layer positioned above the switching elements and provided with contact holes communicating with the switching elements, respectively, pixel electrodes arranged correspondingly with the switching elements, cover members arranged correspondingly with the contact holes, an organic layer extending over the pixel electrodes, the cover members and a portion of the insulating layer positioned below a region between the pixel electrodes, and a counter electrode positioned above the organic layer. Each pixel electrode includes an electrode body positioned above the insulating layer and a contact section extending in the contact hole and electrically connects the electrode body to the switching element. Each cover member covers the contact section and is made of an insulating material.
    Type: Application
    Filed: October 28, 2010
    Publication date: May 12, 2011
    Inventors: Shiro Sumita, Shuhei Yokoyama, Masuyuki Oota, Satoshi Okutani
  • Publication number: 20110089816
    Abstract: An organic EL display device includes a first light emission layer which includes a first dopant material having a first absorbance peak in absorbance spectrum characteristics and a first host material having a first absorbance bottom on a shorter wavelength side than the first absorbance peak, the first light emission layer extending over the first to third organic EL elements and being disposed above pixel electrodes of the first to third organic EL elements, and a second light emission layer which includes a second dopant material having a second absorbance peak in absorbance spectrum characteristics and a second host material having a second absorbance bottom on a shorter wavelength side than the first absorbance peak and than the second absorbance peak, the second light emission layer extending over the first to third organic EL elements and being disposed above the first light emission layer.
    Type: Application
    Filed: December 23, 2010
    Publication date: April 21, 2011
    Inventors: Shuhei YOKOYAMA, Masuyuki Oota, Satoshi Okutani, Takanobu Takenaka
  • Patent number: 7915813
    Abstract: An organic EL display device includes a first light emission layer which includes a first dopant material having a first absorbance peak in absorbance spectrum characteristics and a first host material having a first absorbance bottom on a shorter wavelength side than the first absorbance peak, the first light emission layer extending over the first to third organic EL elements and being disposed above pixel electrodes of the first to third organic EL elements, and a second light emission layer which includes a second dopant material having a second absorbance peak in absorbance spectrum characteristics and a second host material having a second absorbance bottom on a shorter wavelength side than the first absorbance peak and than the second absorbance peak, the second light emission layer extending over the first to third organic EL elements and being disposed above the first light emission layer.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: March 29, 2011
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Shuhei Yokoyama, Masuyuki Oota, Satoshi Okutani, Takanobu Takenaka