Patents by Inventor Mitsuo Ohizumi

Mitsuo Ohizumi 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: 20030038911
    Abstract: A liquid crystal display includes a liquid crystal cell including a first transparent substrate and a second substrate, and a reflector attached to the outer surface of the first transparent substrate with a bonding layer therebetween. A first retarder is disposed on the outer surface of the second transparent substrate, a second retarder is disposed on the first retarder, and a polarizer is disposed on the second retarder. The reflector includes a resin substrate having an irregular surface and a metal reflection layer also having an irregular surface that corresponds to the irregular surface of the reflector. The reflector is attached to the liquid cell so that the metal reflector layer faces the first transparent substrate.
    Type: Application
    Filed: July 10, 2002
    Publication date: February 27, 2003
    Inventors: Tetsushi Tanada, Mitsuo Ohizumi, Mitsuru Kano
  • Publication number: 20020080311
    Abstract: A reflection type liquid crystal display device which satisfies at least the performance requirements for high brightness in the bright display (white display) and a high contrast.
    Type: Application
    Filed: October 17, 2001
    Publication date: June 27, 2002
    Applicant: Alps Electric Co., Ltd.
    Inventors: Tetsushi Tanada, Mitsuo Ohizumi, Mitsuru Kano
  • Publication number: 20020054257
    Abstract: A liquid crystal display includes a pair of substrates which oppose each other with a liquid crystal layer therebetween; a light source provided on the exterior of one of the substrates; and at least an organic film, a metallic reflection film, an overcoat film, an electrode layer, and an alignment film formed on the inner face of one of the substrates. Many concaves are contiguously formed on a surface of the organic film, the inner surface of each concave constituting a part of a spherical surface. The metallic reflection film has a thickness of 80 to 500 Å. A transflector and a liquid crystal display including the transflector are also disclosed.
    Type: Application
    Filed: September 17, 2001
    Publication date: May 9, 2002
    Applicant: Alps Electric Co., Ltd.
    Inventors: Tetsushi Tanada, Mitsuo Ohizumi, Mitsuru Kano
  • Patent number: 6219122
    Abstract: In a reflective liquid crystal display device, a retardation &Dgr;ndLC of a liquid crystal cell ranges from 705 nm to 890 nm.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: April 17, 2001
    Assignee: Alps Electric Co., Ltd.
    Inventors: Tatsuo Uchida, Mitsuo Ohizumi, Mitsuru Kano, Toshiaki Hoshino
  • Patent number: 6219120
    Abstract: A reflective type liquid crystal display of this invention comprises a reflector member having corrugated surface stored therein; an overcoat layer formed on the corrugated surface of the reflector member for making the corrugated surface flat; and a color filter layer formed on the overcoat layer, and wherein a thickness of the overcoat layer is more than twice of a depth of the concave part in the corrugated surface of the reflector member.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: April 17, 2001
    Assignee: Alps Electric Co., Ltd.
    Inventors: Yorihiko Sasaki, Mitsuru Kano, Kenji Omote, Yoshihiko Ishitaka, Mitsuo Ohizumi, Tomomasa Takatsuka
  • Patent number: 6141073
    Abstract: A reflective type liquid crystal display of this invention comprises a reflector member having corrugated surface stored therein; an overcoat layer formed on the corrugated surface of the reflector member for making the corrugated surface flat; and a color filter layer formed on the overcoat layer, and wherein a thickness of the overcoat layer is more than twice of a depth of the concave part in the corrugated surface of the reflector member.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: October 31, 2000
    Assignee: Alps Electric Co., Ltd.
    Inventors: Yorihiko Sasaki, Mitsuru Kano, Kenji Omote, Yoshihiko Ishitaka, Mitsuo Ohizumi, Tomomasa Takatsuka
  • Patent number: 6130736
    Abstract: A reflective type liquid crystal display of this invention comprises a reflector member having corrugated surface stored therein; an overcoat layer formed on the corrugated surface of the reflector member for making the corrugated surface flat; and a color filter layer formed on the overcoat layer, and wherein a thickness of the overcoat layer is more than twice of a depth of the concave part in the corrugated surface of the reflector member.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: October 10, 2000
    Assignee: Alps Electric Co., Ltd.
    Inventors: Yorihiko Sasaki, Mitsuru Kano, Kenji Omote, Yoshihiko Ishitaka, Mitsuo Ohizumi, Tomomasa Takatsuka