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Printing method and apparatus for an ink-jet printer having a wide printhead

An inkjet printer and print head technology, applied in the directions of printing devices, inking devices, printing, etc., can solve the problems of increased image density, inability to increase image density, and increased image density in the best mode 4C.

Inactive Publication Date: 2006-05-10
HEWLETT PACKARD DEV CO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the same ink droplet is repeatedly printed with the nozzles arranged in the first and second rows, the image concentration of the normal mode 4A increases
In addition, the image density of the best mode 4C is the same as figure 2 Best Mode 2C shown in has the same image density, but Best Mode 4C has increased image density
Thus, even when printing is performed with a wide print head having nozzles arranged in two rows, the image density cannot be improved

Method used

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  • Printing method and apparatus for an ink-jet printer having a wide printhead
  • Printing method and apparatus for an ink-jet printer having a wide printhead
  • Printing method and apparatus for an ink-jet printer having a wide printhead

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Embodiment Construction

[0041] Figure 5 An elongated column of wide printheads is illustrated printing an array of ink drops on a print medium in accordance with an embodiment of the invention. refer to Figure 5, ink droplets of various colors, such as yellow (Y), magenta (M), cyan (C) and black (K), are sequentially arranged. The ink droplets Y1, M1, C1, and K1 arranged in the first row and the ink droplets Y2, M2, C2, and K2 arranged in the second row are arranged in the main scanning direction at a horizontal pitch Ph corresponding to a predetermined resolution (such as 1200dpi) . In addition, the ink droplets Y2, M2, C2, and K2 of the second row are shifted from the ink droplets Y1, M1, C1, and K1 of the first row by half the horizontal pitch Ph in the main scanning direction.

[0042] The ink droplets of each color in the first row and the ink droplets in the second row are arranged at a vertical pitch Pv corresponding to a predetermined resolution (eg, 1200dpi).

[0043] Figure 6 Illust...

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Abstract

A printing method and apparatus for an inkjet printer with a wide print head are provided. The printing method includes: receiving print data; and according to the received data, using nozzles arranged in a first row according to colors to form first printing dots on a printing medium at horizontal intervals and using nozzles arranged in a second row to form first printing dots at horizontal intervals at first The positions between the printed dots form second printed dots.

Description

technical field [0001] The present invention relates to a printing method and apparatus which can improve image density and image density when printing on a printing medium using a printer having a printing head wider than the width of a paper sheet. Background technique [0002] Typically, a printhead that ejects ink droplets of a predetermined color onto a page is disposed under an ink cartridge of an inkjet printer. To print on a printing medium, a carriage on which ink cartridges are mounted moves in a main scanning direction to sequentially feed paper sheets in a sub scanning direction. For high-precision printing with a conventional inkjet printer, the moving speed of the carriage in the main scanning direction should be slowed down. [0003] However, when the carriage moves in the main scanning direction, the carriage may vibrate, limiting the ability to print with high precision. [0004] In order to prevent the carriage from moving, a wide print head is disclosed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/07B41J2/155B41J2/21B41J11/42B41J29/38
CPCB41J2/155B41J2/2132B41J2202/20
Inventor 郑晋旭
Owner HEWLETT PACKARD DEV CO LP
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