Patents by Inventor Akiya Izumi

Akiya Izumi 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: 6392729
    Abstract: Disclosed are a liquid crystal display device capable of obtaining preferable display images, whose manufacturing cost is low, and which does not deteriorate the environment at the time of fabrication and a method for fabricating the same.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: May 21, 2002
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Akiya Izumi, Masao Yoshioka, Tatsuo Hamamoto, Norimasa Akiyama
  • Patent number: 5673083
    Abstract: A video camera unit is separated into a holder for receiving lenses and a base on which a solid-state image pickup chip is mounted. The holder and the base are assembled together with the distance between them made variable so that it is possible to adjust the back focus of the lens. Further, a video camera unit has a holder which is separated into a first holder for receiving lenses and a second holder for receiving a solid-state image pickup device so that both holders can be assembled together with the distance between them made variable. Therefore, it is also possible to adjust the back focus of the lens.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: September 30, 1997
    Assignees: Hitachi, Ltd., Echo Co., Ltd.
    Inventors: Akiya Izumi, Iwao Takemoto, Hiroichi Sokei, Masahiko Kadowaki, Takamasa Naito, Hiroyoshi Kojima, Atsumu Iguchi, Masaaki Yokoyama, Junichirou Nakajima, Masayuki Takahashi, Kunio Niwa
  • Patent number: 5400072
    Abstract: A video camera unit is separated into a holder for receiving lenses and a base on which a solid-state image pickup chip is mounted. The holder and the base are assembled together with the distance between them made variable so that it is possible to adjust the back focus of the lens. Further, a video camera unit has a holder which is separated into a first holder for receiving lenses and a second holder for receiving a solid-state image pickup device so that both holders can be assembled together with the distance between them made variable. Therefore, it is also possible to adjust the back focus of the lens.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: March 21, 1995
    Assignees: Hitachi, Ltd., Echo Co., Ltd.
    Inventors: Akiya Izumi, Iwao Takemoto, Hiroichi Sokei, Masahiko Kodowaki, Takamasa Naito, Hiroyoshi Kojima, Atsumu Iguchi, Masaaki Yokoyama, Junichirou Nakajima, Masayuki Takahashi, Kunio Niwa
  • Patent number: 5274456
    Abstract: An imaging assembly, which is particularly useful for a video camera unit, comprising a set of lenses, some of which have a non-refractive surface, and an image sensor. A holder is provided for holding both the set of lenses and the image sensor to be aligned with one another. Circuitry is also provided so that the sensitivity of the image sensor can be electrically varied.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: December 28, 1993
    Assignees: Hitachi, Ltd., Echo Co. Ltd.
    Inventors: Akiya Izumi, Iwao Takemoto, Hiroichi Sokei, Masahiko Kadowaki, Atsumu Iguchi, Junichiro Nakajima, Masayuki Takahashi, Kunio Niwa
  • Patent number: 5223746
    Abstract: A packaging structure is provided which is especially useful for solid-state imaging devices and other semiconductor devices. An Al film is selectively formed on inner lead portions and portions of positioning reference plates located within a ceramic packaging body. On the other hand, the outer lead portions that are exposed outside the packaging body are coated with Sn plating layer. Particular care is taken not to locate the Sn plating layer over the Al film. Contamination faults due to Sn swelling and stripping are prevented, while bonding strength of the Al clad inner lead portions with Al internal fine wires and with fit glass joining the ceramic packaging body together is kept high.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: June 29, 1993
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Hironobu Abe, Masahiko Kadowaki, Toshio Nakano, Hideaki Abe, Akiya Izumi, Tunehisa Horiuchi, Yoshinori Niwata
  • Patent number: 4430400
    Abstract: Disclosed is a method of producing color filters, which comprises forming a layer of an organic polymeric material having a predetermined light-sensitive characteristic on a substrate, exposing this layer to a predetermined pattern, developing the exposed layer to form a filter base and dyeing the filter base, wherein after the development of the exposed layer, the layer is wetted with a dehydrating solution to remove water from the filter base. By this dehydrating treatment, the filter base can be processed with very high precision.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: February 7, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Toshio Nakano, Yoshio Taniguchi, Ken Tsutsui, Akira Sasano, Tadeo Kaneko, Akiya Izumi, Michiaki Hashimoto
  • Patent number: 4412236
    Abstract: A color solid-state imager comprising a semiconductor body which has a photoelectric conversion function and which includes at least photosensitive elements and switching elements, and predetermined color filters which are formed on the body; characterized in that a light absorbing layer is disposed at least over a vicinity of an output terminal of each switching element. The contours of the color filters can be accurately formed, and unnecessary light can be intercepted to stabilize the electrical characteristics of the solid-state imager.
    Type: Grant
    Filed: August 21, 1980
    Date of Patent: October 25, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Akira Sasano, Toshio Nakano, Ken Tsutsui, Michiaki Hashimoto, Tadao Kaneko, Norio Koike, Akiya Izumi
  • Patent number: 4395629
    Abstract: According to a solid-state imager of this invention, in case where a plurality of color filters are disposed on a semiconductor body for the solid-state imager including a plurality of photosensitive regions and where the color filter of a third color is constructed by the overlapping between filter members of a first color and a second color, that one of the filter members which has a spectral transmittance substantially transmitting light for exposure for use in forming the filter members is arranged as a lower layer closer to a substrate of the semiconductor body. Even when the filter members are formed by the exposure process, a solid-state imager having good characteristics can be manufactured.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: July 26, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Akira Sasano, Toshio Nakano, Ken Tsutsui, Michiaki Hashimoto, Tadao Kaneko, Yoshio Taniguchi, Haruo Matsumaru, Akiya Izumi
  • Patent number: 4293586
    Abstract: In forming a fluorescent screen for a cathode ray tube, an undercoat layer is first coated on the inner face of the panel. The undercoat layer contains at least polystyrene particles with a film weight of 0.002 to 0.04 mg/cm.sup.2. Coated on the undercoat layer is phosphor slurry.
    Type: Grant
    Filed: January 16, 1980
    Date of Patent: October 6, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Takaaki Unnai, Akiya Izumi, Misturu Hinosugi
  • Patent number: 3967985
    Abstract: Surfaces of a perforated mask made of iron are allowed to contact with an acidic aqueous solution of antimony trichloride, e.g., a hydrochloric acid solution to form a thin film of metallic antimony on said surfaces. A protective coating of a phosphate is allowed to be deposited onto said thin film. Thereafter, said surfaces is heated in an oxygen atmosphere to produce a grayish black coating having an excellent thermal emission power. The perforated mask thus treated has no permanent deformation like wrinkles produced at a perforated sheet member and is uniform in color.
    Type: Grant
    Filed: October 12, 1973
    Date of Patent: July 6, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Akiya Izumi, Shigemi Hirasawa, Yoshifumi Tomita