Patents by Inventor Sukekazu Aratani

Sukekazu Aratani 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: 7158202
    Abstract: A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, a plurality of scanning signal lines and a plurality of video signal lines formed on one of the pair of substrates, a plurality of first electrodes provided on the one of the pair of substrates, and a plurality of second electrodes provided on the one of the pair of substrates to drive the liquid crystal layer by a voltage difference with respect to the first electrode. The first electrode and the second electrode are arranged in different layers with an insulating layer therebetween. The first electrode has a bent form and each first electrode is connected by connecting portion in each pixel, and the connecting portion has an overlapping relation with at least one the second electrode and a signal line connected to the second electrode.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: January 2, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20060291188
    Abstract: In an organic EL panel for enhancing luminous efficiency and utilization efficiency of light, monochromatic RGB lights emitted from the organic EL panel in which organic EL elements optimum for three monochromatic primary RGB colors are patterned in a stripe-like manner, are adjusted by a liquid crystal panel so as to obtain monochromatic RGB output lights. In addition, the three monochromatic RGB lights are led through color filters with black matrices in order to enhance the color purities and visibilities of the adjusted lights.
    Type: Application
    Filed: June 21, 2006
    Publication date: December 28, 2006
    Inventors: Takahiro Nakayama, Hajime Murakami, Sukekazu Aratani
  • Publication number: 20060261333
    Abstract: The present invention provides a top emission type organic light emitting display apparatus in which manufacture it is possible to prevent the organic film from being oxidized when the upper transparent electrode is formed, and which is capable of emitting light at a low voltage. This organic light emitting display apparatus includes an organic light emitting layer and an upper electrode and a lower electrode sandwiching the said organic light emitting layer between them, and is of a structure in which the light emitted from the organic light emitting layer is taken out from the upper electrode side, wherein a buffer layer mostly made of an oxide with its Gibbs free energy generated at around the melting point being lower than ?300 kJ/mol is provided between the organic light emitting layer and the upper electrode, the side of the organic layer which is in contact with the buffer layer being doped with an electron donative dopant.
    Type: Application
    Filed: May 18, 2006
    Publication date: November 23, 2006
    Inventors: Hajime Murakami, Masao Shimizu, Sukekazu Aratani, Masahiro Tanaka
  • Publication number: 20060260679
    Abstract: The present invention is intended to provide a top emission type organic light emitting display device which prevents the organic film from being oxidized during the formation of the upper transparent electrode and can emit light at a low voltage. The top emission type organic light emitting display device includes: a substrate; an organic light emitting layer; and upper and lower electrodes sandwiching the organic light emitting layer, where the lower electrode is arranged between the substrate and the organic light emitting layer, the upper electrode is arranged on the opposite side of the substrate with respect to the lower electrode, light emitted from the organic light emitting layer is taken out from the upper electrode side, and an organic layer which is mainly composed of an organic material having a heterocyclic group containing one or more nitrogen atoms, is included between the organic light emitting layer and the upper electrode.
    Type: Application
    Filed: May 18, 2006
    Publication date: November 23, 2006
    Inventors: Sukekazu Aratani, Hajime Murakami, Masao Shimizu, Kazuhito Masuda
  • Publication number: 20060244888
    Abstract: A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, a plurality of scanning signal lines and a plurality of video signal lines formed on one of said pair of substrates, a plurality of first electrodes on the one of said pair of substrates and a plurality of second electrodes on the one of said pair of substrates to drive the liquid crystal by a voltage difference with respect to the first electrode. The first electrodes have a bent form, and the second electrodes have a rectangular form.
    Type: Application
    Filed: June 15, 2006
    Publication date: November 2, 2006
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yonai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20060238111
    Abstract: An object of the present invention is to provide an organic light emitting element having a high efficiency and a high quality in which electron and hole injection efficiency of an electrode is reproduced in an insulated or contaminated first electrode. In an organic light emitting display apparatus, a substrate, a first electrode, an insulation film bank formed so as to cover edges of the first electrode, a metal thin film formed on the first electrode and the insulation film bank, an organic light emitting layer, and a second electrode are disposed in the cited order. A lower part of a side face of the insulation film bank takes a reverse tapered shape.
    Type: Application
    Filed: April 20, 2006
    Publication date: October 26, 2006
    Inventors: Masao Shimizu, Hajime Murakami, Sukekazu Aratani, Masahiro Tanaka
  • Patent number: 7095470
    Abstract: A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, scanning signal lines and video signal lines formed on one of the substrates, first electrodes provided on the one substrate, second electrodes provided on the one substrate to drive the liquid crystal layer by a voltage difference with respect to the first electrode, and an orientation film formed on a nearest surface to the liquid crystal layer on each of the substrates and having an initial orientation direction. At least two first electrodes and at least one second electrode are provided in each pixel with the first electrode and the second electrode having portions substantially in parallel. The at least two first electrode are connected by connecting portion in each pixel.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: August 22, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7088414
    Abstract: A liquid crystal display device includes a pair of substrates sandwiching of a liquid crystal layer, plural scanning signal lines and plural video signal lines formed on one of the pair of substrates, and plural pixel regions formed as an area surrounded by an adjacent two of the plural scanning signal lines and an adjacent two of the plural video signal lines. At least a pixel electrode is formed on the one of the pair of substrates in each of the pixel regions, a plurality of counter electrodes is formed on one of the pair of substrates in each of the pixel regions, and at least a counter voltage signal line connects the counter electrodes formed on one of the pair of substrates. The counter voltage signal line is arranged in an overlapping relation with at least one of the scanning signal lines in plan view.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: August 8, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20060158096
    Abstract: Light-emitting devices and light-emitting displays for realizing bright display by allowing light emitted from an emissive layer to efficiently contribute to a display. Polarization separators are arranged between the emissive layer and a phase plate. In the light of a wavelength range which includes a part or all of a light-emission wavelength range of the emissive layer and is narrower than a visible wavelength range and is directed from the emissive layer side to the polarization separators side, the polarization separators reflect circularly polarized light components which are converted into linearly polarized light that is absorbed by the polarizer due to the operation of the phase plate and transmit the other light.
    Type: Application
    Filed: December 20, 2005
    Publication date: July 20, 2006
    Inventors: Masaya Adachi, Yoshiyuki Kaneko, Sukekazu Aratani, Shingo Ishihara
  • Patent number: 7079212
    Abstract: A liquid crystal display device includes a pair of substrates sandwiching a liquid crystal layer, scanning signal lines and video signal lines formed on one substrate, plural pixel electrodes on the one substrate, and at least a counter electrode on the one substrate to drive the liquid crystal layer by a voltage difference with respect to the pixel electrode. An orientation film formed on a nearest surface to the liquid crystal layer on substrate has an initial orientation direction. At least one of the pixel electrode and the counter electrode has a first region and a second region, and an angle formed by the first region and the initial orientation direction is substantially same in absolute value and reverse in polarity to an angle formed by the second region and the initial orientation direction. A length of the first region and the second region are substantially equal.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: July 18, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20060152661
    Abstract: In a liquid crystal display device capable of realizing a viewing angle equivalent to the Braun tube and for controlling display with an electric field in parallel with a substrate surface, a liquid crystal display device is provided which is less in unevenness of display and homogeneous in luminance. A liquid crystal display device has a pair of transparent substrates arranged oppositely through a liquid crystal, means for regulating a direction of initial alignment of the liquid crystal, and a pixel electrode and a counter electrode formed spaced from each other in each pixel region on a liquid crystal side surface of the transparent substrate, wherein an electric field is given between the pixel electrode and the counter electrode to thereby control an amount of light transmitting in the crystal liquid between the electrodes.
    Type: Application
    Filed: March 13, 2006
    Publication date: July 13, 2006
    Inventors: Masuyuki Ota, Sukekazu Aratani, Makoto Yoneya
  • Patent number: 7046325
    Abstract: An active matrix liquid crystal display device having a pair of substrates, a liquid crystal layer, scanning lines and video signal lines provided in a matrix manner, at least one pixel electrode and at least one common electrode. The pixel electrode is bent so as to be inclined in first and second directions which are symmetrical relative to the alignment direction of the liquid crystal. The first direction of the pixel electrode is at a plus predetermined angle relative to the alignment direction, while the second direction of the pixel electrode is at a minus predetermined angle relative to the alignment direction.
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: May 16, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7046324
    Abstract: An active matrix liquid crystal display device having a pair of substrates, a liquid crystal layer, scanning lines and video signal lines provided in a matrix manner, at least one pixel electrode and at least one common electrode. The at least one pixel electrode is bent so as to be inclined in first and second directions which are symmetrical relative to the alignment direction of the liquid crystal. The first direction of the pixel electrode is at a plus predetermined angle relative to the alignment direction, while the second direction of the pixel electrode is at a minus predetermined angle relative to the alignment direction.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: May 16, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7012365
    Abstract: Light-emitting devices and light-emitting displays for realizing bright display by allowing light emitted from an emissive layer to efficiently contribute to a display. Polarization separators are arranged between the emissive layer and a phase plate. In the light of a wavelength range which includes a part or all of a light-emission wavelength range of the emissive layer and is narrower than a visible wavelength range and is directed from the emissive layer side to the polarization separators side, the polarization separators reflect circularly polarized light components which are converted into linearly polarized light that is absorbed by the polarizer due to the operation of the phase plate and transmit the other light.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: March 14, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masaya Adachi, Yoshiyuki Kaneko, Sukekazu Aratani, Shingo Ishihara
  • Publication number: 20060023152
    Abstract: A liquid crystal display device includes a backlight case, a light guide disposed in the backlight case, a light source disposed in the backlight case and arranged at one side of the light guide, and a liquid crystal panel formed over the backlight case. An outer edge of the backlight case is straight in plane view at one side which extends in a direction perpendicular to an elongated direction of the light source, and a width of a top surface of the backlight case at the one side is wider at a position adjacent to the light guide than a width thereof at a position adjacent to the light source arranged.
    Type: Application
    Filed: September 30, 2005
    Publication date: February 2, 2006
    Inventors: Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Kazuhiko Yanagawa, Masahiro Yanai, Nobutake Konishi, Nobuyuki Suzuki, Masahiro Ishii, Makoto Yoneya, Sukekazu Aratani
  • Patent number: 6975374
    Abstract: A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, and a plurality of scan signal lines and a plurality of image signal lines formed on one of the pair of substrates cross each other in a matrix form. A pair of counter electrodes are arranged on both sides of the plurality of image signal lines, and a shielding layer is provided on the one of the pair of substrates and arranged between one of the a pair of counter electrodes and one of the plurality of image signal lines in plan view. A layer of the shielding layer is different from a layer of the pair of counter electrodes and a layer of the one of the plurality of image signal lines.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: December 13, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Kazuhiko Yanagawa, Masahiro Yanai, Nobutake Konishi, Nobuyuki Suzuki, Masahiro Ishii, Makoto Yoneya, Sukekazu Aratani
  • Publication number: 20050221121
    Abstract: It is an object to provide an organic light-emitting element having two or more light-emitting layers, wherein degradation of each constituent material for the light-emitting layer is reduced to improve reliability of the element. The present invention provides an organic light-emitting element having a laminated structure with a first mixed light-emitting layer 4 composed of a hole transport material, an electron transport material and a dopant which determines a color of an emitted light, and a second mixed light-emitting layer 5 composed of a hole transport material, an electron transport material and a dopant which determines a color of an emitted light, and also provides an image display device which uses the organic light-emitting element.
    Type: Application
    Filed: February 14, 2005
    Publication date: October 6, 2005
    Inventors: Shingo Ishihara, Sukekazu Aratani, Masaya Adachi, Takayuki Ouchi
  • Publication number: 20050212003
    Abstract: The present invention provides a top emission type organic light-emitting display device in a production of which it is possible to prevent the organic film from being oxidized when the upper transparent electrode is formed, and which is capable of emitting light at a low voltage. This organic light-emitting display device contains an organic light-emitting layer and an upper electrode and a lower electrode sandwiching the organic light-emitting layer, and is of a structure in which the emitted light is taken out from the upper electrode side, and a buffer layer mainly made of an oxide producing less oxygen by decomposition in the film-forming process than the upper electrode material is provided between the organic light-emitting layer and the upper electrode.
    Type: Application
    Filed: February 10, 2005
    Publication date: September 29, 2005
    Inventors: Hajime Murakami, Masao Shimizu, Sukekazu Aratani, Etsuko Nishimura, Masahiro Tanaka
  • Publication number: 20050206305
    Abstract: It is an object of the present invention to provide an organic light-emitting display of high light-emitting efficiency. The organic light-emitting element comprising a board, upper electrode, lower electrode, a plurality of light-emitting units placed between the upper and lower electrodes, and a charge-generating layer placed between a plurality of the light-emitting units, wherein one of the light-emitting units has a layer for emitting monochromatic light and one of the light-emitting units has a layer for emitting polychromatic light, the former unit having an equivalent or lower light-emitting efficiency than the latter unit.
    Type: Application
    Filed: March 14, 2005
    Publication date: September 22, 2005
    Inventors: Kazuhito Masuda, Shingo Ishihara, Sukekazu Aratani, Masaya Adachi
  • Publication number: 20050127372
    Abstract: A scanning line, a signal line, a first current supply line, and a second current supply line are formed on a glass substrate, a first electrode is formed on the wiring layer comprising the above members, an organic layer comprising a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer is formed on the first electrode, a second electrode is formed as cathode on the electron injection layer, the first electrode as anode is connected to a plus terminal of a power source through the driving devices and the first current supply line, whereas the second electrode as cathode is connected to a minus terminal of the power source, and is connected to the second current supply line in the display region of each pixel, with a contact hole serving as a feeding point, whereby wiring resistance due to the second electrode is reduced, and variations in the brightness of a panel is reduced.
    Type: Application
    Filed: February 1, 2005
    Publication date: June 16, 2005
    Inventors: Shingo Ishihara, Takayuki Ouchi, Toshiro Mikami, Kazuhito Masuda, Sukekazu Aratani