Patents by Inventor Masaru Karai

Masaru Karai 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: 20170235154
    Abstract: The present invention provides a diffuser plate in a simple structure capable of achieving optical properties with less luminance irregularity and color irregularity and good quality of appearance. A diffuser plate is a diffuser plate where a plurality of microlenses are placed on a principal surface, shapes of the plurality of microlenses along a cross-section perpendicular to the principal surface are different from one another and do not have an axis of symmetry. A method for designing the diffuser plate includes steps of determining a specific reference microlens; placing the reference microlens on the principal surface; forming a specific phase modulation shape; and determining a shape of the plurality of microlenses by combining the specific reference microlens and the specific phase modulation shape.
    Type: Application
    Filed: September 30, 2015
    Publication date: August 17, 2017
    Applicant: KURARAY CO., LTD.
    Inventors: Atsushi UCHIDA, Masaru KARAI
  • Publication number: 20170235028
    Abstract: The present invention provides a diffuser plate and a method for producing a diffuser plate that can improve variations in luminance of transmitted light or reflected light in a simple structure and that enable easy design and production.
    Type: Application
    Filed: September 29, 2015
    Publication date: August 17, 2017
    Applicant: KURARAY CO., LTD.
    Inventors: Atsushi UCHIDA, Masashi HIRAI, Masaru KARAI
  • Publication number: 20170031156
    Abstract: The present invention provides a method for designing a light diffusion pattern with which a light diffusion pattern to exhibit desired light diffusion properties can be designed depending on a few systematic procedures. The method includes a lens data preparation step of preparing lens data having desired light diffusion properties, a placement step of placing a plurality of lens data (100) prepared in the lens data preparation step in a predetermined region (200), a cutting step of, when an overlap (210) of lenses (100) occurs in the placement step, cutting out a part (421) of a lens shape to eliminate the overlap (210), and a repositioning step of replicating a shape of the cutout part (421) and repositioning it to another place.
    Type: Application
    Filed: April 9, 2015
    Publication date: February 2, 2017
    Applicant: KURARAY Co., Ltd.
    Inventors: Atsushi UCHIDA, Masashi HIRAI, Masaru KARAI
  • Patent number: 7211333
    Abstract: The present invention is to provide a resin-forming mold having high releasability and permitting a production without increasing production costs. The resin-forming mold can be used to produce a resin-molded product having minute uneven portions on a front face thereof, such as a surface light source device-use light guide for a liquid crystal display, an aspherical micro-lens, micro-Fresnel lens and an optical disk. In the stamper (resin-forming mold) 10 provided with an electroformed layer 11 and a conductive film 12 formed on the electroformed layer 11, the front face layer 12c of the conductive film 12 is formed of aluminum and a back face 12d is formed of nickel as an electroconductive metal. In addition, the constituent composition of the aluminum and the nickel continuously changes from the front face 12c toward the back face 12d. The front face 12c may be formed of aluminum and oxygen. The aluminum may combine with the oxygen to form an oxide of aluminum.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: May 1, 2007
    Assignee: Kuraray Co., Ltd.
    Inventors: Yukihiro Yanagawa, Takumi Yagi, Masaru Karai
  • Publication number: 20060057847
    Abstract: The present invention is to provide a resin-forming mold having high releasability and permitting a production without increasing production costs. The resin-forming mold can be used to produce a resin-molded product having minute uneven portions on a front face thereof, such as a surface light source device-use light guide for a liquid crystal display, an aspherical micro-lens, micro-Fresnel lens and an optical disk. In the stamper (resin-forming mold) 10 provided with an electroformed layer 11 and a conductive film 12 formed on the electroformed layer 11, the front face layer 12c of the conductive film 12 is formed of aluminum and a back face 12d is formed of nickel as an electroconductive metal. In addition, the constituent composition of the aluminum and the nickel continuously changes from the front face 12c toward the back face 12d. The front face 12c may be formed of aluminum and oxygen. The aluminum may combine with the oxygen to form an oxide of aluminum.
    Type: Application
    Filed: May 13, 2004
    Publication date: March 16, 2006
    Applicant: Kuraray Co., Ltd.
    Inventors: Yukihiro Yanagawa, Takumi Yagi, Masaru Karai