Patents by Inventor Dennis L. Chao

Dennis L. Chao 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).

  • On-line ink-duty reduction
    Patent number: 5799136
    Abstract: An ink-jet-printer driver employs clustered-dot dither to generate binary image signals that represent an image that has been adjusted for the ink-duty limit that must be imposed to avoid bleeding on some print media. To impose the limit, a Bayer dither process (94) receives an input that represents the ratio of ink-limit-adjusted ink duty to unadjusted ink duty. A gating operation (96) permits an ink request only at those locations where both dither processes (92 and 94) indicate that an ink is permitted.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: August 25, 1998
    Assignee: Seiko Epson Corporation
    Inventors: Chia-Hsin Li, Andrei Pascovici, Joseph S. Shu, Dennis L. Chao