Patents by Inventor Naonori Miwa

Naonori Miwa 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).

  • Liquid crystal display device, manufacturing method therefor, and electronic apparatus
    Patent number: 6946679
    Abstract: A liquid crystal display device comprises a pair of substrates (11, 12) bonded to each other by a sealing material (13) in the form of a frame provided therebetween, liquid crystal (14) held between the pair of substrates; a reflective layer (111) formed on one (11) of the substrates, and an alignment film (116) formed over the reflective layer (111) at the liquid crystal side. The surface of said one (11) of the substrates has a roughened area (11b) which is roughened and a flat area (11a) which is flat and surrounds the roughened area (11b). The alignment film (116) is formed in the roughened area (11b), and the sealing material (13) is formed in the flat area (11a).
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: September 20, 2005
    Assignee: Seiko Epson Corporation
    Inventors: Naonori Miwa, Keiji Takizawa, Takeyoshi Ushiki, Yoshio Yamaguchi
  • Optical element including an absorptive and reflective polarizer having particular orientation
    Patent number: 6747716
    Abstract: The liquid crystal device of the present invention effectively prevents reversion of bright/dark states between a reflective display mode and a transmissive display mode. The liquid crystal device includes a first absorptive polarizer, which receives light from outside; a liquid crystal cell, which receives light emitted from the first absorptive polarizer; a second absorptive polarizer, which receives light emitted from the liquid crystal cell; and a reflective polarizer, which receives light emitted from the second absorptive polarizer. The reflective polarizer has an axis of reflection in a predetermined direction to reflect at least part of light that has been transmitted through the first absorptive polarizer, the liquid crystal cell, and the second absorptive polarizer to be incident on the reflective polarizer.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: June 8, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Kuroiwa, Naonori Miwa, Atsunari Tsuda
  • Liquid crystal display device, manufacturing method therefor, and electronic apparatus
    Publication number: 20020135715
    Abstract: A liquid crystal display device comprises a pair of substrates (11, 12) bonded to each other by a sealing material (13) in the form of a frame provided therebetween, liquid crystal (14) held between the pair of substrates; a reflective layer (111) formed on one (11) of the substrates, and an alignment film (116) formed over the reflective layer (111) at the liquid crystal side. The surface of said one (11) of the substrates has a roughened area (11b) which is roughened and a flat area (11a) which is flat and surrounds the roughened area (11b). The alignment film (116) is formed in the roughened area (11b), and the sealing material (13) is formed in the flat area (11a).
    Type: Application
    Filed: September 13, 2001
    Publication date: September 26, 2002
    Inventors: Naonori Miwa, Keiji Takizawa, Takeyoshi Ushiki, Yoshio Yamaguchi
  • Liquid crystal device and electronic apparatus using the same
    Publication number: 20020089622
    Abstract: The liquid crystal device of the present invention effectively prevents reversion of bright/dark states between a reflective display mode and a transmissive display mode. The liquid crystal device includes a first absorptive polarizer, which receives light from outside; a liquid crystal cell, which receives light emitted from the first absorptive polarizer; a second absorptive polarizer, which receives light emitted from the liquid crystal cell; and a reflective polarizer, which receives light emitted from the second absorptive polarizer. The reflective polarizer has an axis of reflection in a predetermined direction to reflect at least part of light that has been transmitted through the first absorptive polarizer, the liquid crystal cell, and the second absorptive polarizer to be incident on the reflective polarizer.
    Type: Application
    Filed: March 18, 2002
    Publication date: July 11, 2002
    Applicant: Seiko Epson Corporation
    Inventors: Masahiro Kuroiwa, Naonori Miwa, Atsunari Tsuda
  • Liquid crystal device and electronic apparatus using the same
    Patent number: 6400432
    Abstract: The liquid crystal device of the present invention effectively prevents reversion of bright/dark states between a reflective display mode and a transmissive display mode. The liquid crystal device includes a first absorptive polarizer, which receives light from outside; a liquid crystal cell, which receives light emitted from the first absorptive polarizer; a second absorptive polarizer, which receives light emitted from the liquid crystal cell; and a reflective polarizer, which receives light emitted from the second absorptive polarizer. The reflective polarizer has an axis of reflection in a predetermined direction to reflect at least part of light that has been transmitted through the first absorptive polarizer, the liquid crystal cell, and the second absorptive polarizer to be incident on the reflective polarizer.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: June 4, 2002
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Kuroiwa, Naonori Miwa, Atsunari Tsuda
  • Liquid crystal device and electronic apparatus using the same having two absorptive polarizers, a reflective polarizer, and a backlight
    Patent number: 6317180
    Abstract: The liquid crystal device of the present invention effectively prevents reversion of bright/dark states between a reflective display mode and a transmissive display mode. The liquid crystal device includes a first absorptive polarizer, which receives light from outside; a liquid crystal cell, which receives light emitted from the first absorptive polarizer; a second absorptive polarizer, which receives light emitted from the liquid crystal cell; and a reflective polarizer, which receives light emitted from the second absorptive polarizer. The reflective polarizer has an axis of reflection in a predetermined direction to reflect at least part of light that has been transmitted through the first absorptive polarizer, the liquid crystal cell, and the second absorptive polarizer to be incident on the reflective polarizer.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: November 13, 2001
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Kuroiwa, Naonori Miwa, Atsunari Tsuda