Ink-jet printing method

Abstract

The invention relates to the technical field of ink-jet printing, in particular to an ink-jet printing method, which comprises the following steps of: printing on a printing medium in a mode of mixing color ink and white ink, and then printing in a normal color ink mode. According to the ink-jet printing method, through mixed printing of the color ink and the white ink, the influence of backlight on colors is effectively neutralized, so that a printed product can keep relatively consistent color expression under the conditions of front-side lighting and back-side lighting, and the visual effect and the commercial value of the printed product are greatly improved. Compared with a traditional method, the requirement for repeatedly printing the same image for multiple times is avoided, and therefore the printing speed is remarkably increased. Meanwhile, due to accurate coverage of white ink, unnecessary ink consumption is reduced, and the printing efficiency is further improved. Due to the fact that repeated printing and unnecessary ink use are reduced, the printing cost is reduced to a certain degree through the printing method, and printing is more economical and feasible.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet printing, in particular to an inkjet printing method. Background Art

[0002] In the field of inkjet printing technology, traditional printing methods often produce significant color differences when dealing with different light source conditions (such as front lighting and back lighting), resulting in the printing effect being inconsistent with the original design target. This color difference problem is particularly prominent in specific applications such as light box cloth printing, which will seriously affect the commercial effect and market value of the product.

[0003] Traditionally, in order to reduce the color difference under backlight conditions, a common practice is to first print the original image, then cover it with a layer of white ink, and finally print the original image again. Although this method can reduce the color difference to a certain extent, it has obvious disadvantages: the amount of ink used is greatly increased, the printing speed is slowed down, thereby increasing the printing cost and reducing the printing efficiency.

[0004] Therefore, in view of the above problems, the present invention proposes a new inkjet printing method, which aims to solve the backlight color difference problem in a simpler and more effective way while maintaining printing efficiency and cost control. Summary of the invention

[0005] The purpose of the present invention is to provide an inkjet printing method to solve the problem mentioned in the background art that, in order to reduce the color difference under backlight, a common method is to first print the original image, then cover it with a layer of white ink, and finally print the original image again. Although this method can reduce the color difference to a certain extent, it has obvious disadvantages: the amount of ink used is greatly increased, the printing speed is slowed down, thereby increasing the printing cost and reducing the printing efficiency.

[0006] To achieve the above object, the present invention provides an inkjet printing method, which divides the printing area into two areas, namely, a color and white ink mixed printing area and a color ink printing area, wherein the color and white ink mixed printing area performs mixed printing of color ink and white ink, and the color ink printing area performs color ink printing, and firstly prints on a printing medium in a mixed manner of color ink and white ink, and then prints in a normal color ink manner, and specifically comprises the following steps:

[0007] S1, setting the paper forward direction, when the printing medium is in the first printing position, it enters the color and white ink mixed printing area;

[0008] S2, the printing device first prints the color image and the white image on the printing medium according to the printing data, and after the printing is completed, the paper moves to the second printing position and enters the color ink printing area;

[0009] S3, the printing device prints the color image according to the printing data, and prints the corresponding new color image and white image in the color and white ink mixed printing area according to the printing data, and repeats this process until all the printing data are printed.

[0010] As a preferred solution of this method, the printing device includes a first printing module, a second printing module, and a third printing module that support dividing the printing area into two areas, one printing area performs mixed printing of color ink and white ink, and the other printing area performs color ink printing.

[0011] As a preferred embodiment of the present invention, the first printing module includes a first color nozzle area, a second color nozzle area and a first white nozzle area, the printing intervals of the first color nozzle area and the first white nozzle area overlap, and the printing intervals of the second color nozzle area and the first white nozzle area do not overlap.

[0012] As a preferred embodiment of the present invention, the second printing module comprises a third color nozzle area and a second white nozzle area, and the printing areas of the third color nozzle area and the second white nozzle area overlap.

[0013] As a preferred solution of the present invention, the third printing module includes a fourth color nozzle area and a third white nozzle area, and a part of the color nozzles in the fourth color nozzle area overlaps with the printing area of ​​the third white nozzle area.

[0014] As a preferred solution of the present method, the printing data of the white ink is regarded as the coverage area of ​​the white ink according to the area covered by the color ink.

[0015] As a preferred solution of the present method, the white ink coverage of the area covered by the white ink can be selected according to an actually measured color difference table to reduce the color difference by selecting an appropriate white ink coverage.

[0016] As a preferred solution of the present method, the white ink coverage of the white ink coverage area can be automatically adjusted by software according to a color difference table of color and white ink coverage to reduce the color difference.

[0017] As a preferred solution of the present invention, the white ink coverage of the white ink coverage area can be selected appropriately according to the target backlight source characteristics to reduce the color difference.

[0018] The present invention also provides a method for determining white ink coverage, comprising:

[0019] Q1. Print different white ink coverage rates W at different color ink coverage rates X.

[0020] Q2. Use color instruments to measure the color difference when the backlight is turned on and off;

[0021] Q3. Establish a multi-dimensional color difference table of color and white ink coverage based on the measurement data, where the color ink coverage is the input coordinate and the white ink coverage is the output result.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In this inkjet printing method, the influence of backlight on color is effectively neutralized by mixed printing of color ink and white ink, so that the printed product can maintain relatively consistent color performance under front lighting and back lighting, thereby greatly improving the visual effect and commercial value of the printed product.

[0024] 2. Compared with the traditional method, the inkjet printing method of the present invention avoids the need to repeatedly print the same image, thereby significantly improving the printing speed. At the same time, due to the precise coverage of white ink, unnecessary ink consumption is also reduced, further improving the printing efficiency.

[0025] 3. In the inkjet printing method, since repeated printing and unnecessary use of ink are reduced, the printing method of the present invention reduces the printing cost to a certain extent, making printing more economical and feasible.

[0026] 4. In the inkjet printing method, the printing method of the present invention is applicable to a variety of printing media and printing scenarios, especially in printing applications that need to cope with different light source conditions, such as light box cloth printing, etc., showing stronger adaptability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the printing medium in the present invention;

[0028] Figure 2 It is a schematic diagram of the structure when the printing medium enters the printing position in the present invention;

[0029] Figure 3 It is a structural schematic diagram of the first printing module in the present invention;

[0030] Figure 4 It is a structural schematic diagram of the second printing module in the present invention;

[0031] Figure 5 It is a structural schematic diagram of the third printing module in the present invention;

[0032] Figure 6 This is a schematic diagram showing the color difference of the multi-dimensional color white ink coverage in the present invention;

[0033] The meaning of each number in the figure is:

[0034] 200, first printing module; 201, first color nozzle area; 202, first white nozzle area; 203, second color nozzle area; 210, printing medium; 211, color and white ink mixed printing area; 212, color ink printing area; 310, first printing position; 320, second printing position; 500, second printing module; 501, third color nozzle area; 502, second white nozzle area; 600, third printing module; 601, fourth color nozzle area; 602, third white nozzle area. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention provides an inkjet printing method, such as Figure 1-Figure 6 As shown, the printing area is divided into two areas, namely, a color and white ink mixed printing area 211 and a color ink printing area 212. The color and white ink mixed printing area 211 performs mixed printing of color ink and white ink, and the color ink printing area 212 performs color ink printing. On the printing medium, firstly, the color ink and white ink are mixed, and then the normal color ink is printed. Specifically, the following steps are included:

[0037] S1, setting the paper forward direction, the printing medium 210 enters the color and white ink mixed printing zone 211 when it is at the first printing position 310;

[0038] S2, the printing device first prints the color image and the white image on the printing medium 210 according to the printing data, and after the printing is completed, the paper moves to the second printing position 320 and enters the color ink printing zone 212;

[0039] S3. The printing device prints a color image according to the printing data, and prints a corresponding new color image and white image in the color and white ink mixed printing section 211 according to the printing data, and repeats this process until all the printing data are printed. In the color and white ink mixed printing section 211, the mixed printing of color ink and white ink can effectively neutralize the influence of different light sources on the color, especially under backlight conditions. This mixed printing method makes the color on the printing medium 210 more uniform and consistent, and can present a color effect close to the original design regardless of whether it is front-lit or back-lit.

[0040] The printing method of the present invention optimizes the printing process through reasonable zone division and printing step design. The printing medium 210 first enters the color and white ink mixed printing zone 211 for mixed printing, and then advances to the color ink printing zone 212 for normal color ink printing. This process design not only improves printing efficiency, but also reduces unnecessary repeated printing and ink waste.

[0041] Since the method of the present invention can deal with the color difference problem under different light source conditions, it has stronger printing adaptability. Whether in applications such as light box cloth printing that requires backlight display, or in other printing scenarios that need to maintain color consistency, the present invention can provide excellent printing effects.

[0042] In this embodiment, the printing device includes a first printing module 200, a second printing module 500, and a third printing module 600 that support dividing the printing area into two areas, one of which performs mixed printing of color ink and white ink, and the other of which performs color ink printing. This modular design not only supports mixed printing of color ink and white ink, but also allows independent color ink printing, thereby improving the flexibility and efficiency of printing. Through reasonable module configuration, it is easy to quickly switch and meet different printing needs.

[0043] Specifically, the first printing module 200 includes a first color nozzle area 201, a second color nozzle area 203 and a first white nozzle area 202, the printing intervals of the first color nozzle area 201 and the first white nozzle area 202 overlap, and the printing intervals of the second color nozzle area 203 and the first white nozzle area 202 do not overlap. The first printing module 200 achieves accurate mixed printing of color ink and white ink by cleverly combining the first color nozzle area 201, the second color nozzle area 203 and the first white nozzle area 202. Among them, the printing intervals of the first color nozzle area 201 and the first white nozzle area 202 overlap, ensuring that the color ink and white ink can be fully mixed to produce a more uniform and full color effect. The printing intervals of the second color nozzle area 203 and the first white nozzle area 202 do not overlap, which ensures that independent color ink printing can be performed when needed, increasing the diversity and flexibility of printing.

[0044] Further, the second printing module 500 includes a third color nozzle area 501 and a second white nozzle area 502, and the printing intervals of the third color nozzle area 501 and the second white nozzle area 502 overlap. The second printing module 500 is composed of the third color nozzle area 501 and the second white nozzle area 502, and the printing intervals of the two overlap. This design allows mixed printing of color ink and white ink to be performed in the second printing module, further enhancing the adaptability of the printing device and the consistency of the printing effect. By adjusting the working parameters and printing strategy of the nozzle, accurate color control at different printing positions can be achieved.

[0045] Further, the third printing module 600 includes a fourth color nozzle area 601 and a third white nozzle area 602, and a portion of the color nozzles in the fourth color nozzle area 601 overlap with the printing area of ​​the third white nozzle area 602. The third printing module 600 includes a fourth color nozzle area 601 and a third white nozzle area 602, and a portion of the color nozzles overlap with the printing area of ​​the white nozzle. This design allows partial mixing of color ink and white ink during the printing process to achieve color adjustment and optimization of a specific area. By accurately controlling the injection amount and injection position of the nozzle, a more delicate and realistic printing effect can be produced.

[0046] Furthermore, the printing data of white ink is regarded as the coverage area of ​​white ink according to the area covered by color ink. By associating the printing data of white ink with the area covered by color ink, this embodiment realizes the accurate determination of the coverage area of ​​white ink. This association method ensures that white ink can be accurately covered at the required position, avoids unnecessary waste and printing errors, and improves the accuracy and efficiency of printing.

[0047] Furthermore, the white ink coverage of the white ink coverage area can select an appropriate white ink coverage according to the actual measured color difference table to reduce the color difference. This embodiment allows to select an appropriate white ink coverage according to the actual measured color difference table to reduce the color difference. This method can ensure that the printed color is closer to the original design through precise measurement and analysis, thereby improving the color reproduction and visual effect of the printed product.

[0048] Furthermore, the white ink coverage of the white ink coverage area can be automatically adjusted by the software according to the color difference table of color white ink coverage to reduce the color difference. By automatically adjusting the white ink coverage of each area according to the color difference table of color white ink coverage, this embodiment realizes the intelligentization and automation of the printing process. This method not only improves the accuracy and efficiency of printing, but also reduces the possibility of human intervention and errors, making the printing process more stable and reliable.

[0049] Furthermore, the white ink coverage of the white ink coverage area can be selected according to the characteristics of the target backlight source to reduce the color difference. This embodiment also allows the selection of an appropriate white ink coverage according to the characteristics of the target backlight source to reduce the color difference. This method fully considers the impact of different backlight conditions on color, and adjusts the coverage of white ink to neutralize this impact, so that the printed product can present an ideal color effect under different lighting conditions.

[0050] The present invention also provides a method for determining white ink coverage, comprising:

[0051] Q1. Print different white ink coverage rates W at different color ink coverage rates X.

[0052] Q2. Use color instruments to measure the color difference when the backlight is turned on and off;

[0053] Q3. Establish a multi-dimensional color difference table of color and white ink coverage based on the measurement data, where the color ink coverage is the input coordinate and the white ink coverage is the output result.

[0054] By printing different white ink coverages W under different color ink coverages X and using a color instrument for precise measurement, the present invention can accurately capture the color difference when the backlight is turned on and off. This precise color difference control method ensures the color consistency and accuracy of the printed product under different lighting conditions.

[0055] Establish a color difference table to guide printing: Based on the measurement data, the present invention establishes a multi-dimensional color difference table of color and white ink coverage. This color difference table uses color ink coverage as input coordinates and white ink coverage as output results, providing clear guidance for the printing process. By consulting the color difference table, the operator can quickly determine the required white ink coverage under different color ink coverage, thereby improving printing efficiency and accuracy. By accurately controlling the coverage of white ink, the present invention avoids unnecessary waste of white ink and optimizes the use of white ink. This not only helps to reduce printing costs, but also reduces pollution to the environment, which is in line with the concept of green printing.

[0056] The method of the present invention effectively reduces the color difference and improves the color reproduction and visual effect of the printed product by accurately controlling the white ink coverage, which makes the printed product more realistic and delicate, and meets the demand for high-quality printing.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An inkjet printing method, characterized in that: The printing area is divided into two areas, namely, a color and white ink mixed printing area (211) and a color ink printing area (212). The color and white ink mixed printing area (211) performs mixed printing of color ink and white ink, and the color ink printing area (212) performs color ink printing. On the printing medium, firstly, the color ink and white ink are mixed, and then the normal color ink printing is performed. Specifically, the following steps are included: S1, setting the paper forward direction, when the printing medium (210) is at the first printing position (310), entering the color and white ink mixed printing zone (211); S2, the printing device first prints a color image and a white image on a printing medium (210) according to the printing data, and after printing is completed, the paper moves to a second printing position (320) and enters a color ink printing zone (212); S3, the printing device prints a color image according to the printing data, and prints a corresponding new color image and white image in the color and white ink mixed printing area (211) according to the printing data, and repeats this process until all the printing data is printed.

2. The inkjet printing method according to claim 1, characterized in that: The printing device comprises a first printing module (200), a second printing module (500), and a third printing module (600) which support dividing a printing area into two areas, one printing area performs mixed printing of color ink and white ink, and the other printing area performs color ink printing.

3. The inkjet printing method according to claim 2, characterized in that: The first printing module (200) comprises a first color nozzle area (201), a second color nozzle area (203) and a first white nozzle area (202); the printing intervals of the first color nozzle area (201) and the first white nozzle area (202) overlap, and the printing intervals of the second color nozzle area (203) and the first white nozzle area (202) do not overlap.

4. The inkjet printing method according to claim 2, characterized in that: The second printing module (500) comprises a third color nozzle area (501) and a second white nozzle area (502), and the printing areas of the third color nozzle area (501) and the second white nozzle area (502) overlap.

5. The inkjet printing method according to claim 2, characterized in that: The third printing module (600) comprises a fourth color nozzle area (601) and a third white nozzle area (602), and a portion of the color nozzles of the fourth color nozzle area (601) overlap with the printing area of ​​the third white nozzle area (602).

6. The inkjet printing method according to claim 1, characterized in that: The printing data of white ink is regarded as the coverage area of ​​white ink according to the area covered by color ink.

7. The inkjet printing method according to claim 6, characterized in that: The white ink coverage rate of the area covered by the white ink can be selected according to the actual measured color difference table to reduce the color difference.

8. The inkjet printing method according to claim 6, characterized in that: The white ink coverage rate of the white ink coverage area can be automatically adjusted by software according to the color difference table of color and white ink coverage rate to reduce the color difference.

9. The inkjet printing method according to claim 6, characterized in that: The white ink coverage rate of the white ink coverage area can be selected according to the target backlight light source characteristics to reduce the color difference.

10. A method for determining white ink coverage, comprising: Q1. Print different white ink coverage rates W at different color ink coverage rates X. Q2. Use color instruments to measure the color difference when the backlight is turned on and off; Q3. Establish a multi-dimensional color difference table of color and white ink coverage based on the measurement data, where the color ink coverage is the input coordinate and the white ink coverage is the output result.

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