KR19990020924A - How to adjust print data for each print media in the image printing system - Google Patents

Abstract

Color data of the original according to the type of printing medium applied to compensate for the color distinction according to the type of printing medium used to print the originals created in the computer of an image printing system including an interconnected printer and a computer. Preparing a color data conversion table for each print medium for correcting the information; converting the color data of the document with reference to the color data conversion table corresponding to the print medium selected by the user; and printing corresponding to the converted color data. Generating data; According to the printing data adjustment method for each print media of the image printing system, even if the print media fed to the printer is changed, the image quality of the desired color can be obtained evenly, thereby improving the print quality.

Description

How to adjust print data for each print media in the image printing system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting print data for each print medium of an image printing system. More particularly, the present invention relates to a method of adjusting print conditions by changing color data of an image of an original created by a computer according to print characteristics of a selected print medium. The present invention relates to a method of adjusting print data for each print media of the system.

An image printing system has a computer and a printer connected via mutual cables or networks.

In such an image printing system, when image data of a document created by a computer is transferred from the computer to a printer, the printer prints an image corresponding thereto on the loaded paper.

An electrophotographic printer forms an image by injecting a toner or liquid ink, which is a solid developer, onto a photosensitive medium on which an electrostatic latent image is formed by exposure, and then forms a paper cassette between the rotating rollers in contact with the photosensitive medium. A desired image can be printed by feeding and passing paper loaded in the paper.

Such a conventional image printing system does not change the printing conditions depending on the type of printing medium used for printing, that is, the type of printing paper, so that the developing operation can be carried out collectively according to the color data values of originals produced by a computer. The same printing conditions were applied. As a result, in spite of the same developing condition according to the ink adsorption characteristics of the paper which is the applied print media, there is a problem that the color of the image printed on the OHP film or glossy paper is different from that of the general paper.

The present invention was devised to improve the above problems, and by providing appropriate printing conditions according to the type of printing media to be applied, it is possible to suppress the color difference for the print result even for different printing media during printing. It is an object of the present invention to provide a method for adjusting print data for each print medium of an image printing system.

1 is a block diagram illustrating an image printing system to which a printing data adjustment method for each printing medium of the present invention is applied.

FIG. 2 is a diagram illustrating a print medium selection menu provided through a monitor screen of the image printing system of FIG. 1.

3 is a flowchart illustrating a method of adjusting print data for each print medium according to the present invention.

Explanation of symbols for main parts of the drawings

10: Computer 11: Central Processing Unit (CPU)

12: ROM 13: RAM

15: storage device 16: input device

17: monitor 18: color data conversion table

20: printer

In order to achieve the above object, a method of adjusting print data for each print medium of the image printing system according to the present invention includes a printer and a print medium used for printing a document created in the computer of an image printing system including a computer connected to the printer. Preparing a color data conversion table for each print medium for correcting color data of the original according to the type of the print medium applied to compensate for the color distinction according to the type of the paper; Converting the color data of the original by referring to the color data conversion table corresponding to the print medium selected by the user; Generating print data corresponding to the converted color data.

Hereinafter, a method of adjusting print data for each print medium of the image printing system according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an image printing system to which a printing data adjustment method for each printing medium of the present invention is applied.

In the image printing system, the user computer 10 and the printer 20 are interconnected by a communication interface.

The user computer 10 includes a central processing unit (CPU) 11, a ROM 12, a RAM 13, a storage device 15 connected to them by a system bus, and an input device ( 16) a monitor 17 as an output device. The input device 16 includes a keyboard and a mouse.

The storage device 15 stores a table of color data conversion tables 18 for each type of print medium.

The print media 1 and the print media 2 indicated by the classification name of the print media indicate the general print media terms such as plain paper and OHP film, and the color profile 1 and the color profile 2 correspond to the print media. Points to the color data conversion table.

Originals of text or image files created by the computer 10 are displayed with color data in accordance with the promised color display grade criteria. For example, the original color data is represented by the sum of the tones of red (R), green (G), blue (B) or yellow (Y), magenta (M), cyan (C), and black (K), and each color. The grade is assigned within the gray level range of 256 levels. The color data conversion table 18 is provided with an alternative grade table for replacing the grade of the color applied to the original in accordance with the texture characteristics of the print medium with respect to the color data of the original created by such a color expression method.

A method of adjusting print data for each print medium according to the present invention will be described with reference to FIGS. 2 and 3 together with FIG. 1.

First, in the preparation step 100, the color data conversion table 18 for each print medium is prepared. The method for obtaining the color data conversion table 18 for each print medium may be variously applied. For example, the density of the developing ink corresponding to the promised color display grade standard may be determined by a print medium such as plain paper, glossy paper, or OHP. The color data conversion table can be constructed by conversely obtaining a color display grade based on the color display grade criteria from the resulting color sense when applied to film paper or the like. For example, the color grade of OHP film paper resulting from color data corresponding to the red level 125 applied to express the color of the original corresponds to the red level 128, glossy paper is 126 red, and plain paper is 125 red. In this case, the OHP film paper color data conversion table has a color level of 125 red when the original color data is 128 red, and in the same principle, the color data conversion table 18 of another print medium is also used. Is created.

When the color data conversion table 18 of the print medium is prepared, the color data of the original to be printed is converted with reference to the color data conversion table 18 corresponding to the print medium selected by the user (step 200). When the print job is instructed by the user, as shown in FIG. 2, the print medium selection menu 19 may be provided through the monitor 17 screen of the computer to facilitate the selection of the print medium by the user.

After the color data conversion step 200, when the printer 20 executes a print job according to the print data generation process 300 and the generated print data necessary for the print job, the print job is completed. The print data is a signal converted in accordance with the engine driving of the printer 20 so that the information contained in the color data can be expressed by the engine driving of the printer 20.

In the illustrated example, the color data conversion table 18 is embedded in the storage device 18 of the computer 10 so that the color data of the original is selected in accordance with the printing conditions of the selected paper prior to the data transfer from the computer 10 to the printer 20. The printer 20 is only required to perform a print process according to the received information, and alternatively, the color data of the document transmitted from the computer 10 is transmitted to the printer 20 as it is. The color data conversion table 18 is provided in a storage device (not shown) of the printer 20 to convert the color data received inside the printer with reference to the color data conversion table 18, and then generate print data. It can also be done.

As described above, by providing a method for adjusting print data for each print medium of the image printing system according to the present invention, even if the print medium supplied to the printer is changed, the image quality of a desired color can be obtained evenly, thereby improving the print quality.

Claims (1)

According to the type of the print medium applied to compensate for the color differentiation according to the type of the print medium used to print the document created in the computer of the image printing system including a printer and a computer connected to the printer. Preparing a color data conversion table for each print medium to correct color data; Converting the color data of the original by referring to the color data conversion table corresponding to the print medium selected by the user; Generating print data corresponding to the converted color data; and adjusting the print data for each print medium of the image printing system.