KR20010027263A - Color Alternative Printing Method Using Block Printing Head in Color Inkjet Printer - Google Patents

Abstract

PURPOSE: A color printing method using black print head for color ink jet printer is provided to allow the printing operation to be continuously performed even when color ink or black ink is absent. CONSTITUTION: A method comprises a first step(S10) of receiving print image formed by an ink jet printer driver from a host computer; a second step(S20) of periodically checking an operation panel and judging whether a substitute elementary color is selected by a user input; a third step(S30) of checking to which of three elementary colors the selected elementary color falls, if it is judged in the second step that a substitute elementary color is selected by a user input; a fifth step(S40) of substituting the color of the image designated as the substitute elementary color by black, and performing printing by using a black print heat; and a fifth step(S50) of performing a normal printing operation by transmitting the print image to the print head corresponding to the elementary color, if it is judged in the second step that the substitute elementary color is not selected.

Description

Color alternative printing method using block printing head in color inkjet printer}

The present invention relates to a color replacement printing method by a black print head in a color inkjet printer, and more particularly, to a color replacement printing by a black print head in a color ink jet printer that enables printing of one primary color image with a black print head. It is about a method.

Basically, the color printing system performs color printing by mixing three colors of inks, cyan (C), magenta (M), and yellow (Yellow; Y), based on the CMY color coordinate system. In this case, cyan (C), magenta (Magenta; M), yellow (Y), blue (Blue = Cyan + Magenta) for a pixel based on a color halftone processing technique such as color error accurate binarization processing. ; C + M), red (Red = Magenta + Yellow; M + Y), green (Yellow + Cyan; Y + C), black (Black = Cyan + Magenta + Yellow; C + M + Y) You can print color combinations of branches, and you can print 8 colors, including those that do not print any color ink (white, white). To perform the color error diffusion binarization process, the target pixel is designated in the order of raster scanning from the input color image, and the color components of the pixel of interest are separated and cyan (C), magenta (M), and yellow (Yellow; Y). Convert to series. As the input color image is generally composed of RGB color coordinates, it is necessary to convert it to CMY color coordinates. The equation for converting an RGB color coordinate system to a CMY color coordinate system uses Equation 1, which is well known.

In this case, the conventional method of spreading the color error for three-color printing is a method of applying the error diffusion independently to cyan (Cyan; C), magenta (M), and yellow (Yellow; Y). . However, such a three-color printing system has a disadvantage in that black colors are not reproduced properly, and thus, a four-color color printing system with black ink has been introduced, and in recent years, a light cyan; Six color printing systems with C ') and light magenta (M') are being actively introduced. The color printing process of the inkjet printer according to the prior art based on the color printing system will be briefly described as follows.

First, create an image or text in an application such as a graphic tool or word processor, generate a print image using an inkjet printer driver, and then transfer the generated print image to an inkjet printer through a printer cable. . The inkjet printer receiving this input transfers the transferred print image directly to the print head without deformation and starts printing.

In other words, the inkjet printer receives the print image produced by the host computer for the CMY color print head and the K print head (black print head), and then drives the color print head and the black print head for each image. The printer's firmware sends the image from the host computer directly to the printhead and prints it, regardless of whether each color ink is consumed. Therefore, when the specific ink is used up, the desired color cannot be printed. If the user does not recognize such a condition, there is a problem in that the user has no choice but to obtain a print without printing a specific color.

Accordingly, the present invention has been made to solve such a problem, and the inkjet printer allows a user to add an operation panel that allows the user to select one of each primary color to be replaced by a black print head. SUMMARY OF THE INVENTION An object of the present invention is to provide a color replacement printing method using a black print head in a color inkjet printer capable of printing by selectively replacing color with black.

1 is a flow chart showing a preferred embodiment of a color alternative printing method by a black print head in a color inkjet printer according to the present invention;

2 is an exemplary view for explaining a printing process when magenta is selected as an alternative primary color according to a preferred embodiment of the present invention;

3 is an exemplary diagram for describing a printing process when a turquoise color is selected as an alternative primary color according to a preferred embodiment of the present invention.

In order to achieve the above object, a color replacement printing method using a black print head in a color inkjet printer according to the present invention is black printing in a color inkjet printer having an operation panel for selecting replacement of one primary color among three primary colors. In the color replacement printing method by the head, the control panel is inspected every predetermined time as a print image generated by an inkjet printer driver is input from a host computer to determine whether an alternative primary color is selected by user input, When the substitute primary color is selected by the user input, after checking whether the substitute primary color is one of the three primary colors, a specific ink is generated by replacing the color of the print image designated as the substitute primary color with black using a black print head. Continue printing even if it runs out It is possible to expand the user's choice.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a color alternative printing method by a black print head in a color inkjet printer according to the present invention will be described in detail as follows.

1 is a flowchart showing a preferred embodiment of a color replacement printing method by a black print head in a color inkjet printer according to the present invention.

In a color inkjet printer according to the present invention, a preferred embodiment of the method for color replacement printing by a black print head performs printing based on a preset color printing system, as shown in FIG. 1, and converts one of the three primary colors to black. In a color replacement printing method by a black print head in a color inkjet printer having an operation panel for selecting replacement of

A first step (S10) of receiving a print image generated by an inkjet printer driver from a host computer;

A second step (S20) of checking whether the substitute primary color is selected by a user input by checking the operation panel at a predetermined time according to receiving the generated printed image;

A third step (S30) of identifying which of the three primary colors is the alternative primary color when the alternative primary color is selected by the user input;

A fourth step (S40) of replacing the color of the print image designated as the substitute primary color with black using a black print head; And

If the substitute primary color is not selected by the user input, a fifth step S50 of transferring the print image to the print head of each of the corresponding primary colors to perform a normal printing operation.

Here, the fourth step (S40) is a step of performing printing for the remaining two color primary colors other than the color primary color selected as the substitute primary color (S41); And printing (S42) the position on the printing sheet on which the substitute primary color is to be printed in black.

With reference to the accompanying drawings, a preferred embodiment of the color replacement printing method by the black print head in the color inkjet printer according to the present invention configured as described above will be described in detail.

First, in a first step S10, a print image generated by an inkjet printer driver is received from a host computer.

In the second step S20, the control panel is inspected every predetermined time according to the input of the generated print image, and it is determined whether a substitute primary color is selected by a user input.

As a result of the determination in the second step S20, when the alternative primary color is selected by the user input, in the third step S30, it is checked whether the alternative primary color is the three primary colors.

In the fourth step S40, the color of the print image designated as the substitute primary color is replaced with black by using the black print head to print.

The process of performing the fourth step S40 will be described in more detail. First, in step S41, printing for the remaining two color primary colors is performed except for the color primary color selected as the substitute primary color. Thereafter, in step S42, the position on the printing sheet on which the substitute primary color is to be printed is printed in black.

2 is an exemplary diagram for describing a printing process when magenta (M) is selected as an alternative primary color according to a preferred embodiment of the present invention. Here, '1' means printing the primary color, and '0' means not printing.

Referring to FIG. 2, as the user selects the magenta (M) through the operation panel, the magenta is removed from the color image, and then replaced with a black image.

On the other hand, when the actual printing process will be described with reference to FIG. 3, for example, when cyan (C) is selected as an alternative primary color and a print image as shown in FIG. 3A is input, the first printing excludes cyan (C) as shown in FIG. 3B. Then, only magenta (M) and yellow (Y) are printed, and in the second printing, the position on the printing paper on which cyan (C) is to be printed is printed in black (K) as shown in FIG. 3C.

If the alternative primary color is not selected by the user input as a result of the determination in step S20, in step S50, the print image is transferred to the print head of each corresponding primary color to perform a normal printing operation.

Through the above process, the whole alternative printing process is completed.

In a preferred embodiment of the present invention, a CMYK four-color color printing system using cyan, c, magenta, yellow, yellow, black, and black as a primary printing color is used as a color printing system. It is preferable to use.

Terminologies used herein are terms defined in consideration of functions in the present invention, which may vary according to the intention or customs of those skilled in the art, and the definitions should be based on the contents throughout the present application. will be.

In addition, since the present invention has been described through the preferred embodiment of the present invention, in view of the technical difficulty aspects of the present invention, those having ordinary skill in the art can easily be different from another embodiment of the present invention. Since modifications may be made, it is obvious that both the embodiments and modifications cited in the above description belong to the claims of the present invention.

As described in detail above, in a color inkjet printer having an operation panel for selecting replacement of one of the three primary colors into black, a color replacement printing method by a black print head, comprising: an inkjet printer driver from a host computer; Upon receiving the generated print image, the operation panel is checked at a predetermined time to determine whether an alternative primary color is selected by a user input, and if the alternative primary color is selected by the user input, the alternative primary color is the three primary colors. According to the present invention which checks which one and then prints by replacing the color of the print image designated as the substitute primary color with black using a black print head, it is possible to continuously perform printing even when a specific ink is depleted. There is an advantage to widen the choices. By replacing the depleted primary color with black, the user can print with a black print head even when a specific color is consumed, so that the entire printed image can be viewed in the replaced color even without the purchase of a color cartridge.

Claims (3)

In a color replacement printing method by a black print head in a color inkjet printer having an operation panel for performing printing based on a predetermined color printing system and selecting replacement of one of the three primary colors with black, Receiving a print image generated by an inkjet printer driver from a host computer; Checking the operation panel every predetermined time according to the input of the generated printed image to determine whether a substitute primary color is selected by a user input; If the substitute primary color is selected by the user input, identifying which of the three primary colors is the substitute primary color; And Printing by substituting black for the color of the print image designated as the substitute primary color using a black print head; And And if the substitute primary color is not selected by the user input, transferring the printed image to the print head of each of the corresponding primary colors, and performing a normal printing operation. Color alternative printing method by head. The method of claim 1, wherein the fourth step, Performing printing for the remaining two color primary colors except for the color primary color selected as the substitute primary color; And And printing the position on the print paper to which the substitute primary color is to be printed in black. The method of claim 1, wherein the predetermined color printing system, CMYK 4-color printing system using Cyan, C, Magenta, M, Yellow, Y, and Black as the primary colors. Color alternative printing method.