KR20010027260A - Method for Adjusting the Density of Primary Color in Color Inkjet Print - Google Patents

Abstract

PURPOSE: A method is provided to maximize user convenience and satisfaction by adding an operation panel for adjusting printing concentration to the printer or providing the host computer with a concentration adjusting function. CONSTITUTION: A method comprises a first step(S10) of receiving, from a host computer, print image generated by an ink jet printer driver; a second step(S20) of checking panel concentration with respect to the relevant elementary color set by a user input by periodically checking the operation panel; and a third step(s30) of performing printing operation with respect to the print image in such a manner that the final ink of each print head printed onto printing paper is amounted in proportion to the panel concentration of each relevant elementary color.

Description

Method for Adjusting the Density of Primary Color in Color Inkjet Print}

The present invention relates to a method for adjusting the primary color density of a color inkjet printer, and more particularly, to an inkjet printer, an operation panel for allowing a user to adjust the density for each primary color or a density control function to a host computer. In addition, the present invention relates to a method for adjusting the primary color density of a color inkjet printer, which allows a user to selectively adjust the density for a specific color.

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 (M), Yellow (Y), Blue (Blue = Cyan + Magenta) for a pixel based on color halftone processing techniques such as color error diffusion binarization processing, etc. ; 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 (mono print head), and then drives the color print head and the mono print head for each image. The printer's firmware sends the image from the host computer directly to the printhead to print, regardless of the overall outline or color change, so the printer itself cannot adjust the overall color of the image and takes into account the current state of the printer. Will print. Therefore, it is not possible to emphasize one of the four primary colors of C, M, Y, and K, or to adjust the density for each of the C, M, Y, and K colors individually, and thus it is impossible to control the consumption of specific colors or the reduction of specific colors. It is supposed to be done.

Therefore, the present invention has been made to solve such a problem, the user by adding an operation panel (operational panel) that allows the user to adjust the density for each primary color to the inkjet printer or by adding the density adjustment function to the host computer It is an object of the present invention to provide a method for adjusting the primary color density of a color inkjet printer, in which the density of the specific color can be selectively adjusted.

1 is a flow chart showing a preferred embodiment of the method for adjusting the primary color density of a color inkjet printer according to the present invention,

2 is an exemplary view for explaining a process of printing the primary color of the river concentration according to the present invention,

3A and 3B are exemplary views for explaining a process of printing a primary color of about a concentration according to the present invention.

In order to achieve the above object, the primary color density adjusting method of a color inkjet printer according to the present invention is a primary color density adjusting method of a color inkjet printer having an operation panel for adjusting the printing density of each print head, the method comprising: from a host computer; As the print image generated by the inkjet printer driver is received, the operation panel is checked at a predetermined time to check the panel density for each corresponding primary color set by the user input, and the final ink of each print head implanted on the printing paper. Color printing is performed according to the user's intention by lowering or repeating the print image transmitted from the host computer according to the adjusted density by performing a printing operation on the print image so that the amount is proportional to the panel density of the corresponding primary color identified above. It is characterized by being able to adjust.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the method for adjusting the primary color density of a color inkjet printer according to the present invention will be described in detail.

1 is a flowchart showing a preferred embodiment of the method for adjusting the primary color density of a color inkjet printer according to the present invention.

A preferred embodiment of the method for adjusting the primary color density of a color inkjet printer according to the present invention is an operation panel for performing printing based on a preset color printing system and adjusting the print density of each print head, as shown in FIG. 1. In the primary color density adjustment method of a color inkjet printer having a,

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

A panel density checking step (S20) of checking a panel density for each corresponding primary color set by a user input by checking the operation panel at a predetermined time according to receiving the generated print image; And

And performing a printing operation step (S30) for performing a printing operation on the print image so that the final ink amount of each print head implanted on the printing paper is proportional to the panel density of the corresponding primary color identified above.

Here, the step of performing the print job (S30), step (S31) of determining whether the panel concentration of each of the identified primary colors belong to the river concentration, medium concentration and weak concentration;

If it is determined that the panel density of each of the corresponding primary colors is the strong density, transferring the printed image to a print head of each of the corresponding primary colors and performing two printings at normal density (S32);

If it is determined that the panel density of each of the corresponding primary colors is the medium density, transferring the print image to the print head of each of the corresponding primary colors and performing one printing at the normal density (S33); And

If it is determined that the panel density of each of the corresponding primary colors is about the weak density, the printed image of the primary colors is masked off by 50% before being transferred to the print head of each of the corresponding primary colors. The content of the image to be printed is reduced to 50% so as to perform blurring printing (S34).

With reference to the accompanying drawings, a preferred embodiment of the primary color density adjusting method of the color inkjet printer according to the present invention configured as described above will be described in detail.

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

In the panel density checking step (S20), the panel is checked for each corresponding primary color set by a user input by checking the operation panel every predetermined time as the generated print image is received.

Finally, in the printing execution step S30, a printing operation is performed on the print image such that the final ink amount of each print head implanted on the printing paper is proportional to the panel density of each of the identified primary colors.

The process of performing the printing step S30 will be described in more detail. In step S31, it is determined whether the panel concentrations of the corresponding primary colors belong to the strong, medium, and weak concentrations. .

If it is determined in step S31 that the determined panel density of each of the corresponding primary colors is the strong density, then in step S32, the print image is transferred to the print head of each of the corresponding primary colors, twice at a normal density. Perform printing.

This is because when the panel density is set to print only one primary color of C, M, and Y at a strong density, the print image is transferred to a print head of C, M, and Y primary colors to perform one print at a normal density, and then This means that only the primary color set as the density is repeated one more time.

For example, when only the cyan (C; Cyan) of the transferred print image is to be printed in bold (strong density), the first print is printed as shown in the upper part of FIG. 2 and the second print is printed as shown in the lower part of FIG. Here, '1' means printing the primary color, and '0' means not printing.

On the other hand, if it is determined in step S31 that the determined panel density of each of the corresponding primary colors is the medium density, then in step S33, the print image is transferred to the print head of each of the corresponding primary colors, thereby providing the normal density. Perform one time print. That is, in this case, if the primary color is set to medium density, the printing is performed as it is.

Finally, if it is determined that the panel density of each of the corresponding primary colors is about the density, in step S34, the print image of the corresponding primary colors is transferred by 50% before delivering the print image to the print head of each of the corresponding primary colors. Masking off reduces the content of the image to be actually printed to 50%, resulting in blurry printing.

For example, when delivered from the host computer as shown in FIG. 3A, if the concentration of C is set to a weak intensity, the hexadecimal 'AA', that is, the '0xAA' value and the AND logic bit operation are performed for 50% masking off. This makes the cyan (C) image blurry. Accordingly, as shown in FIG. 3B, when the image has a deformed image and is transferred to the print head for printing, the cyan image may be blurred.

In the preferred embodiment of the present invention, the masking off is performed by 50% in order to blur the printing, but if the masking off is performed at a ratio smaller than 100% even if not necessarily 50%, the degree of the cloudy density can be easily controlled. Do.

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 the method for adjusting the primary color density of a color inkjet printer having an operation panel for adjusting the print density of each printhead, a print image generated by an inkjet printer driver is received from a host computer. Accordingly, checking the operation panel at a predetermined time to confirm the panel density for each corresponding primary color set by the user input, and to make the final ink amount of each print head implanted on the printing paper proportional to the panel density of the corresponding primary color identified above. According to the present invention for performing a print job for the print image, there is an advantage that the color image can be adjusted according to the user's intention by lowering or repeatedly printing the print image transmitted from the host computer according to the adjusted density. .

According to this, the user can print a particular color part in a dark color to emphasize or blur it to adjust ink saving of a specific color and contrast with other colors. When the four primary colors are directly applied to the print image generated by the host computer, the inkjet printer can be used in various applications and variations, thereby maximizing user convenience and satisfaction.

Claims (4)

In the method for adjusting the primary color density of a color inkjet printer having an operation panel for performing printing based on a predetermined color printing system and adjusting the print density of each print head, A print image input step of receiving a print image generated by the inkjet printer driver from a host computer; A panel density checking step of checking the operation panel every predetermined time according to the input of the generated printed image to check panel density for each corresponding primary color set by a user input; And A printing performing step of performing a printing operation on the print image such that the final ink amount of each print head implanted on the printing paper is proportional to the panel density of each of the identified primary colors. How to adjust. The method of claim 1, wherein the performing of the print job comprises: Determining which panel concentration of each of the identified primary colors belongs to the river concentration, the medium concentration, and the weak concentration; If it is determined that the panel density of each of the corresponding primary colors is the strong density, transferring the printed image to the print head of each of the corresponding primary colors and performing two printings at normal density; If it is determined that the panel density of each of the corresponding primary colors is the medium density, transferring the print image to the print head of each of the corresponding primary colors to perform one printing at the normal density; And If it is determined that the panel density of each of the corresponding primary colors is about the density, masking off the printing image of the primary colors by a predetermined percentage less than 100% before delivering the print image to the print head of each of the corresponding primary colors. off) to reduce the content of the image to be actually printed to the predetermined percentage and to blur the printing of the primary color density of the color inkjet printer. The method of claim 3, wherein the predetermined percentage is, A method for adjusting the primary color density of a color inkjet printer, characterized in that 50%. The method of claim 1, wherein the predetermined color printing system, CMYK 4-color printing system using cyan, cyan, magenta, yellow, yellow, black, and black as a primary color method of color inkjet printers .