Patents by Inventor Keigo Yamasaki

Keigo Yamasaki 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).

  • Printing with selection of sub-scanning
    Patent number: 6769759
    Abstract: An object of the present invention is to provide a technique that makes it possible to improve the image quality by selecting adequate paper feedings in a printer that performs printing. First, a test pattern is printed according to the interlace recording mode. The test pattern includes a plurality of color patches respectively printed using different correction values. The correction values for respective feed amounts are determined by investigating the printing results of this test pattern. Then, when an image is printed in this interlace recording mode, the sub-scan feed amount is corrected according to this correction value.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: August 3, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Keigo Yamasaki, Koichi Otsuki
  • Printing with reduced outline bleeding
    Patent number: 6561610
    Abstract: Outline bleeding of printed images can be reduced in a printer in which ink dots are formed on a print medium, because the amount of ink contained in the dots for forming boundary lines, which bleed easily, is reduced by skipping some dots or varying the dot size. As a result, texts and other printed images having sharply defined outlines can be printed with high legibility.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: May 13, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Keigo Yamasaki, Akito Sato
  • Printing with selection of sub-scanning
    Publication number: 20030048326
    Abstract: An object of the present invention is to provide a technique that makes it possible to improve the image quality by selecting adequate paper feedings in a printer that performs printing. First, a test pattern is printed according to the interlace recording mode. The test pattern includes a plurality of color patches respectively printed using different correction values. The correction values for respective feed amounts are determined by investigating the printing results of this test pattern. Then, when an image is printed in this interlace recording mode, the sub-scan feed amount is corrected according to this correction value.
    Type: Application
    Filed: June 28, 2002
    Publication date: March 13, 2003
    Inventors: Keigo Yamasaki, Koichi Otsuki
  • Printing with reduced outline bleeding
    Publication number: 20020070990
    Abstract: Outline bleeding of printed images can be reduced in a printer in which ink dots are formed on a print medium, because the amount of ink contained in the dots for forming boundary lines, which bleed easily, is reduced by skipping some dots or varying the dot size. As a result, texts and other printed images having sharply defined outlines can be printed with high legibility.
    Type: Application
    Filed: October 1, 2001
    Publication date: June 13, 2002
    Applicant: Seiko Epson Corporation
    Inventors: Keigo Yamasaki, Akito Sato