Patents by Inventor Keita Oka

Keita Oka 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: 12104068
    Abstract: A non-aqueous ink composition which has superior printing performance, such as continuous discharge stability, and also has excellent storage stability and excellent coloring properties, and with which printed matter having superior durability can be obtained. A non-aqueous ink composition discharged using an inkjet method, the composition containing an organic solvent, a colorant, and a resin, where the resin contains at least one resin selected from the group consisting of acrylic resins, vinyl chloride-vinyl acetate copolymer resins, and cellulose resins, and a resin having intrinsic viscosity at 25° C. of 90 mL/g or more accounts for up to 5 mass % of the entire resin.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: October 1, 2024
    Assignee: DNP FINE CHEMICALS CO., LTD.
    Inventors: Ryouhei Oka, Yoshiya Maegawa, Keita Yoshiyuki, Karuna Iwasawa, Yuka Orikasa, Keishiro Yoshimori
  • Publication number: 20190098267
    Abstract: Features of the present disclosure implement a light illumination system that utilizes a scanning device that is pivotal on an axis between a plurality of positions. To this end, the system may partition the image frame into at least a first sub-image frame and a second sub-image frame. The system may adjust the scanning device, during the first time period, to a first position to reflect light associated with the first sub-image and adjust the scanning mirror, during the second time period, to a second position to reflect light associated with the second sub-image. Thus, by implementing the techniques described herein, the overall size of a linear array (e.g., liquid crystal on silicon or LCoS) in an optics systems (as well as of some optical components in the optics systems) may be reduced from its current constraints, and thereby achieving a compact optical system that is mobile and user friendly.
    Type: Application
    Filed: September 27, 2017
    Publication date: March 28, 2019
    Inventors: Yarn Chee POON, Richard A. JAMES, Jeb WU, Mark Louis Wilson O'HANLON, Vijay Krishna PARUCHURU, Keita OKA
  • Patent number: 9891436
    Abstract: A near eye or heads up display system includes a display engine, at least two optical waveguides, and a respective coating on at least one of the major surfaces of at least one of the waveguides. At least one such coating has a low reflectance for light within a specific wavelength range for the waveguide and incident on a major surface of the waveguide on which the coating is located at an angle below a low threshold angle relative to a normal, and has a high reflectance for light within the specific wavelength range for the waveguide that is incident on the major surface on which the coating is located at an angle above a high threshold angle relative to the normal.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: February 13, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: R. Andrew Wall, Tuomas Vallius, Pasi Pietila, Keita Oka
  • Publication number: 20170235142
    Abstract: A near eye or heads up display system includes a display engine, at least two optical waveguides, and a respective coating on at least one of the major surfaces of at least one of the waveguides. At least one such coating has a low reflectance for light within a specific wavelength range for the waveguide and incident on a major surface of the waveguide on which the coating is located at an angle below a low threshold angle relative to a normal, and has a high reflectance for light within the specific wavelength range for the waveguide that is incident on the major surface on which the coating is located at an angle above a high threshold angle relative to the normal.
    Type: Application
    Filed: February 11, 2016
    Publication date: August 17, 2017
    Inventors: R. Andrew Wall, Tuomas Vallius, Pasi Pietila, Keita Oka