The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1996
Filed:
Apr. 30, 1993
Gregory D Raskin, San Diego, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
In bidirectional inkjet printing, in certain situations the printer uses relatively large amounts of ink--in relation to the amount of liquid carrier that can be absorbed by or evaporated from the printing medium that is in use. For example, this occurs when a printer does double-ink-drop printing on transparency stock, particularly for particular colors (e.g., cyan). In such situations an undesirable, unesthetic mottling effect can arise. It has been discovered that, in this case, print quality can be improved by deliberately selecting a relatively large amount of jitter or random variation in firing time within each pixel column--actually the equivalent of about one eighth of a column width.