Patents Examined by Hhoushang Safaipour
  • Optical scanning device, optical scanning method, and image forming apparatus
    Patent number: 7995251
    Abstract: A light-source drive control unit divides each pixel of the image data into a plurality of subpixels, deletes certain subpixels from the image data in accordance with predetermined correction data, shifts remaining subpixels in the sub-scanning direction thereby obtaining reduced image data, and controls a plurality of light sources based on the reduced image data in such a manner that one line of the subpixels is formed with a light beam emitted from a corresponding one of the light sources.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: August 9, 2011
    Assignee: Ricoh Company, Limited
    Inventors: Jun Tanabe, Masaaki Ishida, Yasuhiro Nihei, Atsufumi Omori