Printing device, printing method and program thereof

A technology of a printing device and a printing head, which is applied in the field of printing technology, can solve problems such as ink drop formation position deviation, and achieve the effect of suppressing brightness changes

Active Publication Date: 2013-05-15
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This error occurs even if the main scan is limited to unidirectional typing
[0010] In addition, it is known that due to the deflection of the printing medium, such as pr...

Method used

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  • Printing device, printing method and program thereof
  • Printing device, printing method and program thereof
  • Printing device, printing method and program thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0063] A first embodiment of the present invention will be described.

[0064] A-1. Device composition:

[0065] figure 1 It is a schematic configuration diagram of the printer 20 as the first embodiment of the present invention. The printer 20 is a serial ink-jet printer that performs bidirectional printing. As shown in the figure, the printer 20 has a mechanism for conveying the printing paper P by the paper feed motor 74, and the carriage 80 is moved along the axis of the platen cylinder 75 by the carriage motor 70. A mechanism for reciprocating movement, a mechanism for driving the print head 90 mounted on the carriage 80 to eject ink and dot formation, management and communication between the paper feed motor 74 , the carriage motor 70 , the print head 90 and the operation panel 99 The control unit 30 constitutes the exchange of signals.

[0066] The mechanism for reciprocating the carriage 80 in the axial direction of the platen cylinder 75 consists of a slide shaft ...

no. 2 Embodiment

[0153] D-1. Jitter mask:

[0154] Next, a second embodiment of the present invention will be described. The hardware of the printer 20 as the second embodiment is the same as that of the first embodiment (refer to figure 1 ). Also, the print control processing in the printer 20 ( Figure 4 ) are the same except for the dithering mask used in halftoning. The second embodiment also performs halftone processing by the so-called dithering method.

[0155] The difference between the dither mask used in the second embodiment and the dither mask used in the first embodiment is as follows.

[0156] (1) What both have in common:

[0157] · Dither masks are all 64×64 in size.

[0158] ・Both are dispersion-type dither masks that prioritize dispersion.

[0159] · When the formation positions of the dots of the forward movement and the backward movement deviate, the changes in the CIEL*a*b* color space all satisfy the following conditions (A) to (C).

[0160] (A) When the printed ...

example 1

[0210] In the second embodiment, it is shown that in the above-mentioned step S331, the pixel group of the printed image is divided into a pixel group composed of forward moving points and a pixel group composed of backward moving points, with respect to the virtual dithering mask The threshold value arrangement of 61 is a configuration in which the threshold value corresponding to any one pixel group is shifted by a predetermined pixel amount in a predetermined direction to generate a dither mask 62 . However, the divided pixel groups are not limited to the above examples, as long as they are pixel groups with different printing conditions.

[0211] For example, when the print head 90 prints an image in a predetermined area through a plurality of main scans, the pixel group of the printed image may be divided into pixels that form dots in different main scans among the plurality of main scans. Group. For example, through paths 1 to 4, the region composition of the image is c...

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Abstract

The invention provides a printing device, a printing method and a program thereof. The printing device includes the following features. The first dot group in which dots are formed based on the first printing condition and the second dot group in which dots are formed based on a printing condition which is different from the first printing condition are formed together in a common region. In the common region, when the printing is performed in a plurality of conditions such that a difference of the dot pitch between a formation position of dots belonging to the first pixel group and a formation position of dots belonging to the second pixel group is 2/720 inch to 5/720 inch, the change in CIEL*a*b* of the printed image is within the preliminary determined range.

Description

technical field [0001] The present invention relates to printing techniques for printing images using dots. Background technique [0002] Conventionally, printing devices such as printers have used techniques for reproducing multi-gradation images by recording one or more types of dots on a printing medium. In recent years, such multi-gradation technology has achieved remarkable development, and inks of various tones such as cyan (C), magenta (M), yellow (Y), and black (K) are combined in two sizes. dots and control their distribution, so that so-called photo-quality images can also be formed. Such dot arrangement includes a dot concentration type represented by a network dot type in which dots are concentrated, and a dot distribution type in which dots are arranged as dispersedly as possible. In the latter case, it is known that due to the development of techniques for analyzing the distribution of points in the region of spatial frequency, at present, the distribution of...

Claims

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Application Information

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IPC IPC(8): B41J2/21
CPCH04N1/502G06K15/10H04N1/405B41J2/2121H04N1/40
Inventor 角谷繁明
Owner SEIKO EPSON CORP
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