JPS5865666A - Color image composing method - Google Patents

Abstract

PURPOSE:To make it possible to produce desired color display by such an arrangement wherein inks of three basic colors, each has two kinds, i.e. dark and light, are used and image elements are composed by arranging the recorded positions of those basic colors and mixed colors, each composed of 2 kinds of ink, on the surface of a recording paper in the form of matrix. CONSTITUTION:In an ink jet recording method wherein ink particles are generated by adding vibration of a piezoelectric vibrator 2 to an ink flow spouted from a nozzle 1 and they are charged by a charging electrode 4 and then caused to deflect by deflection electrodes 5, 6 and they form an image on a recording paper 8, 7 kinds of ink nozzle for dark and light cyane, dark and light magenta, dark and light yellow and black, are used and ink dots are obtained by those colors and mixed colors, each composed of 2 kinds of ink, and 1 image element is composed of a matrix of kXl of these color dots, and by this method many number of color can be represented by small number of colors. For instance, when a matrix of 1X2 is used, the intermediate color of cyane and magenta can be represented by 3 times more than that of 1 dot 1 image element system.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a high-quality 5K inkjet recording method in which cyan, magenta, and yellow color ink particles with #I lightness of at least 2 m are arranged in a matrix to form an image. This invention relates to a color image composition method.

This type of inkjet recording device is mainly used for monochromatic printing, and one way to express monochrome printing is to modulate the size of the generated ink particles with an image signal. There are methods to change the size of the print diameter, methods to form ink particles into a mist and modulate the writing quality with image signals, and methods to change the number of dots of ink particles recorded between scanning line pitches. Alternatively, there is a method of changing the apparent thickness of the upper recording scanning line. However, it is difficult to apply these methods directly as a color image expression method using color ink, and even if they are applied, the four devices are complicated, difficult to control, and the stability is poor. Furthermore, if the number of nozzles that eject ink is equal to the number of color inks required for a single IsK, a large number of K inks and nozzles are required to reproduce natural color tones.

The device becomes complicated and large, and there is also the problem of reduced maintainability due to nozzle clogging.

The present invention aims to eliminate these disadvantages.

Using at least two shades of cyan, 1 zenta, and yellow ink, each color of stiffness and 1 position of a color obtained by mixing two of these inks are allocated on the paper surface i) in a risky manner. If I were to configure it, I would be able to display it in any color. Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows a schematic configuration of an example of an inkjet image recording device used in the present invention, and numeral 1 indicates a nozzle.

2 is a piezoelectric vibrator, 3 is an ink particle, 4 is an electric electrode, S,
・ is a deflection electrode, T is a gutter for collecting unnecessary ink, and $ is Kibra paper. In the dispensing field of such an inkjet printing apparatus, first, pressure is applied to the ink by a pressure device (not shown), and the ink is ejected from the nozzle 1. Ultrasonic vibrations are superimposed on this ink flow by a piezoelectric vibrator 2 to generate ink particles 3. The ink particles 3, which have been given a charge amount according to the recording signal by the charging electrode 4, are deflected by a deflection amount proportional to the charge amount as they pass through the deflection electrodes S and 6 to which a high voltage is applied, and the ink particles 3 are deflected by a deflection amount proportional to the charge amount. A single image is formed on top. Ink particles 3 that are unnecessary in 11 are collected by the 1-collection gutter TK.

In 1111WJ, nozzle 1. Seven sets of the piezoelectric vibrator 2° charged electrode 40 collection gutter 1 are installed for each ink of dark cyan, light cyan, -magenta, light magenta, dark yellow ρ-2fk yellow, and black for monochromatic brass. and a deflection electrode S.

S is common to all inks.

Il! is an inkjet device with a monochromatic ink dot diameter of 100 μm! When using ink, even if two types of ink particles are ejected into the same position and the colors are mixed, the dot diameter is at most 120-130 μms, which is difficult to distinguish from the case of single-color ink. If we allow up to two types of color mixture, then this emission 1j
Therefore, using #1 light color ink has the same effect as using many different types of color ink. When n types of dark and light color inks are used, it appears as if 51 types of ink were used.

In Figure 2, six types of ink are used: noble cyan, light cyan, fa magenta, light magenta, dark yellow, and light yellow.
This figure shows 21 types of basic color tods and mixed color tods that are expressed when two types of color mixtures are allowed. C, M, and Y are cyan, magenta, and yellow, respectively.
Uppercase letters indicate dark ink, lowercase letters indicate light ink.

for example.

mY indicates a color mixture of light i zenta and light yet p-, and yet ts
-The color becomes red, close to V.

Furthermore, as shown in Figure 3, the colors obtained in this way are viewed as a matrix of kXJ, and if the colors are arranged appropriately in the matrix, an even larger number of colors can be expressed. For example, when a light scene and a deep magenta are used, the intermediate color between the scene and magenta is as shown in Fig. 4(a). b) K indicates 5, IX
If matrix No. 2 is used as one pixel, the number of colors that can be expressed can be increased to three.

Type of ink 1lIIk and -V) lique size.

It depends on the purpose of use, that is, when high resolution is required, the matrix size is kept at 1XIK and the types of interface IIfIk are increased, and conversely, when the simplicity of the device is required rather than resolution.

Increase the matrix size and reduce the number of ink lady light types.

In addition, if a constant dot diameter is always required, the same effect as i & color can be obtained by arranging two color dots F in a matrix as shown in Figure 6 when mixing inks. may be increased, and in some cases, cyan, ″f
Even if you use light ink other than zenta and yellow, it will still fade.

Furthermore, by using both shaded and light planter inks, you can also express texture and saturation! become.

As explained above, the present invention uses cyan, magenta, and yellow color inks with shading of at least 2s1 or more, and by distributing them as a one-pixel matrix, a simple device configuration is possible. It is possible to represent any number of colors at any resolution up to high resolution and high color numbers.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of an inkjet one-piece apparatus used in the present invention, FIG. 2 is a diagram showing an example of the ink color shown above in appearance according to the present invention, and FIG. 3 is an IFI
Figure 4 showing an example of display when representing i-index in matrix form.
Figures ra) and (b) are diagrams showing the number of cyan and magenta intermediate colors of the trunk when no i-tritus representation is performed and when no matrix representation is performed, respectively. FIG. 5 is a diagram showing an example of a matrix representation of color mixing. In the figure, 1 is a nozzle, 2 is a piezoelectric vibrator, 3 is an ink particle,
4 is a charging electrode, 5.6 is a deflection electrode, T is a collection gutter,
8 is a recording paper. Figure 1 Figure 2 Figure 4 Figure 5

Claims (1)

[Claims] In an inkjet recording method using an inkjet device that records by jetting ink toward recording paper from an ink jetting nozzle, at least 42 types of pale cyan, magenta, and yellow color inks are used. , ink particles are ejected from separate ink ejecting nozzles, and each ink particle is collided with the paper surface on which it is arranged, thereby recording in various colors, and in a color corresponding to the ink type. Record the recording position of the desired color tod among the mixed color dots obtained by ejecting the tod and three types of ink particles at the same recording position on the recording paper surface and overlapping them (V) within a unit area on the paper surface. A color image composition method characterized by composing an image by assigning it in a Ux-like manner.