Patents by Inventor Kazuhiko Fujihara

Kazuhiko Fujihara 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: 12222676
    Abstract: A preparing method of an electrostatic charge image developing toner includes: aggregating binder resin particles in a dispersion containing the binder resin particles to form aggregated particles; and coalescing the aggregated particles by heating a dispersion containing the aggregated particles to form toner particles, in which the aggregating includes adding a divalent or higher valent metal salt compound to the dispersion containing the binder resin particles, and the preparing method satisfies the following Requirement (1), Requirement (1): a ratio M/S of a total metal ion amount M (mol) generated from the divalent or higher valent metal salt compound to a total surface area S (m2) of the binder resin particles at a start of the aggregating is 1.5×1010 or more and 2.5×1013 or less.
    Type: Grant
    Filed: August 27, 2021
    Date of Patent: February 11, 2025
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Yoshimasa Fujihara, Daisuke Noguchi, Kazuhiko Nakamura, Hiroshi Nakazawa
  • Patent number: 6259426
    Abstract: A stereoscopic feeling can be easily emphasized by properly applying seven items of: a front/rear feeling and depth feeling circuit 14 constructed by a front/rear feeling to shift a position of an image in the horizontal direction on the basis of edge information of a video signal and add to a binocular parallax and a depth feeling to set a center fusion image plane to a position behind a display surface; a glossy feeling and contrast emphasizing circuit 15 for detecting a glossy portion of the video signal and emphasizing a contrast of a single eye and both eyes in the glossy portion; a V aperture control and coring sharpness circuit 16 constructed by a vertical aperture control to raise frequencies of a middle low band or higher at a change point in the vertical direction and a coring sharpness to give a sharpness to only an edge having a large amplitude and high frequency components; and a color emphasizing circuit 17 for emphasizing color contrasts of colors other than a skin color.
    Type: Grant
    Filed: April 21, 1999
    Date of Patent: July 10, 2001
    Assignee: Sony Corporation
    Inventors: Shigeru Harada, Junji Kagita, Yoshihito Osawa, Kazuhiko Fujihara
  • Patent number: 6201566
    Abstract: When a 2-dimensional video image is displayed, a front/rear feeling and a stereoscopic feeling are enabled to be expressed. A detection signal Sd is formed by a high pass filter 25 and a rectifying circuit 26 in accordance with an amount of edge information. The detection signal Sd is supplied to a variable delay circuit 14L. A detection signal Sd′ is supplied to a variable delay circuit 14R. The variable delay circuits 14L and 14R are controlled in accordance with the edge information amount so that a video image for the left eye and a video image for the right eye are moved in the opposite directions. Thus, an imaginary image is synthesized to the front or rear side from a display plane. The left and right video images are displayed on CRTs 20L and 20R. The projection light passes through a horizontal polarizing filter 21L and a vertical polarizing filter 21R and the left and right video images are overlapped on a screen 22.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: March 13, 2001
    Assignee: Sony Corporation
    Inventors: Shigeru Harada, Junji Kagita, Yoshihito Ohsawa, Kazuhiko Fujihara
  • Patent number: 5764303
    Abstract: A vertical deflection control circuit includes a double-speed counter (18) for counting a clock with a frequency of 2f.sub.H, f.sub.H representing a horizontal frequency of an inputted video signal, in synchronism with a vertical sync signal, timing generating means (20) for judging even-field/odd-field of the input video signal and generating a timing signal based on a judged result, and offset signal adding circuitry (28) for adding an offset value to an output of the double-speed counter (18) at a timing of the timing signal, thereby a video signal in a vertical deflection system can be double-scanning-converted with a simple arrangement.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: June 9, 1998
    Assignee: Sony Corporation
    Inventors: Kazuhiko Fujihara, Akira Shirahama