US 6,547,358 B1 · Ink jet printing apparatus and ejection data forming method

Abstract

In an ink jet printer, formation time of processing for generating data for providing a treatment liquid for improving fixing or water resistance of an ink by insolubilizing or coagulating a color material in the ink is reduced. For this purpose, to perform HV conversion for raster data for image data related to printing, processing for temporarily storing image data and processing of rewriting the HV conversion result are performed in a same sequence. For example, a treatment liquid data formation register having the same structure as an HV conversion register is provided. This register is masked to a pattern according to a treatment liquid composition on a printing medium and is made corresponding to data bits of the HV conversion register. Print data accessed by the HV conversion register is located in relation to the access, thereby forming the treatment liquid data simultaneously.

Claims20

Dependent claims

An ink jet printing apparatus using a print head on which ejection openings capable of forming print dots by ejecting inks on a printing medium are arranged, and a treatment liquid head on which ejection openings capable of forming treatment liquid dots by ejecting a treatment liquid for insolubilizing or coagulating a color material in the ink are arranged, said print head and said treatment liquid head being scanned relatively to the printing medium in a direction different from a direction of arrangement of the ejection openings, said apparatus comprising:

means for converting data continuing in a direction corresponding to the relative scanning as data for print dots to be formed on the printing medium into data in a direction corresponding to the arrangement direction of said ejection openings
means for generating forming position information of the treatment liquid dots on the printing medium corresponding to the data for print dots;
and
control means for processing the data conversion by said converting means and the generation of the treatment liquid dot forming position information by said generating means, in a same sequence.

1 more element

An ejection data forming method for an ink jet printing apparatus using a print head on which ejection openings capable of forming print dots by ejecting inks on a printing medium are arranged, and a treatment liquid head on which ejection openings capable of forming treatment liquid dots by ejecting a treatment liquid for insolubilizing or coagulating a color material in the ink are arranged, said print head and said treatment liquid head being scanned relatively to the printing medium in a direction different from a direction of arrangement of the ejection openings, said method comprising the steps of:

converting data continuing in a direction corresponding to the relative scanning as data for print dots to be formed on the printing medium into data in a direction corresponding to the arrangement direction of said ejection openings;
generating forming position information of the treatment liquid dots on the printing medium corresponding to the data for print dots;
and
controlling the data conversion by said converting step and the generation of said treatment liquid dot forming position information by said generating step to be processed in a same sequence.

1 more element

Dependencies are inferred from the claim text.

Ink jet printing apparatus and ejection data forming method

Life of this patent

Ink jet printing apparatus and ejection data forming method

Life of this patent

Abstract

Claims20