Tektronix, Inc.

A J Rogers

David Lyell Knierim

Ronald F Burr

Hue Phuoc Le

Jon C Mutton

James D Padgett

Wayne Jaeger

A method for increasing resolution in a image printed by an ink jet printer is provided. The method selectively removes painted pixels from a bit map to ensure that no two adjacent pixels are painted by the same ink jet. The method removes painted pixels in a manner that preserves the edges of characters and other features. The resulting processed bit map ensures that an individual print head jet always addresses at least one non-painted/blank pixel after each painted pixel it fills. This allows the speed of the receiving surface relative to the print head to be increased to thereby allow for greater resolution in the printed image for a given print time.

Method for enhancing resolution in a printed image

Gray scale ink jet printing method and apparatus produce a high quality image having varying color intensities. This is achieved by mixing a colored phase change ink with varying amounts of a clear phase change ink base, thereby producing multiple gray scale levels of each color. The mixing either can be performed prior to placement of the phase change ink in the printer, or can be performed within the printer to produce different levels of color intensity during the printing process.

Method and apparatus for producing ink intensity modulated ink jet

Growing community of inventors

West Linn, OR, United States of America

A J Rogers