Patents Assigned to Shigeo Mikoshiba
  • Patent number: 6529204
    Abstract: A method of displaying a dynamic halftone image on a display panel made of pixels divides each frame of the image into subframes and turns on and off the subframes. The method includes the steps of finding a line of pixels that simultaneously display a specific intensity level in a frame and another specific intensity level in the next frame, counting the number of pixels in the line, selecting corrective pulses, which turn on/off corresponding subframes to enable/disable corresponding intensity levels, according to the counted number and a change in the specific intensity levels between the frames, and adjusting original display signals for the pixels in the line according to the corrective pulses, respectively. The method eliminates halftone disturbance and false color contours from the image even if the moving speed of the image on the display panel is high.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: March 4, 2003
    Assignees: Fujitsu Limited, Shigeo Mikoshiba
    Inventors: Shigeo Mikoshiba, Takahiro Yamaguchi, Kosaku Toda, Tsutae Shinoda, Kyoji Kariya, Toshio Ueda
  • Patent number: 6100939
    Abstract: A intra-field time division tone display method for dividing the time width in a field of a TV signal into a plurality of subfields in the pixel storing time direction and displaying the TV image by controlling the presence or absence of light emission of the subfields and an apparatus therefor, wherein there are at least two subfields (most significant subfields) whose luminant time widths are longest and almost equal and when it is assumed that the tones are displayed in the ascending order starting from the lowest level of tone in light emission of the subfields, the tone of a TV image signal is displayed under a rule that two or more light emissions are not started from the aforementioned at least two most significant subfields at the same time, accordingly the dynamic false contour noise of a moving image followed by movement of the viewing point can be reduced remarkably and a moving image of high image quality and high quality can be obtained.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: August 8, 2000
    Assignees: Hitachi, Ltd., Shigeo Mikoshiba, Takhiro Yamaguchi, Kohsaku Toda
    Inventors: Akihiko Kougami, Masaji Ishigaki, Shigeo Mikoshiba, Takahiro Yamaguchi, Kohsaku Toda