Method, device, equipment and storage medium for printing double-sided images with the same row of nozzles

Abstract

The present invention discloses a method, device, equipment and storage medium for printing double-sided images with nozzles in the same row. The method comprises: obtaining the covering order of each covering layer of the image to be printed; determining the inkjet unit and the inkjet order of each inkjet unit according to the covering order of each covering layer of the image to be printed; determining the inkjet state of each inkjet unit each time it scans once along the main scanning direction according to the inkjet order; and controlling the corresponding inkjet unit to perform inkjet printing on the printing medium according to the inkjet state. The device comprises a covering order obtaining module, an inkjet unit and inkjet order determining module, an inkjet state determining module, and an inkjet printing module. The device comprises: at least one processor, at least one memory and computer program instructions stored in the memory. The storage medium stores computer program instructions thereon. The present invention solves the technical problem in the prior art that nozzles arranged in the same row cannot achieve double-sided printing.

Description

Technical Field

[0001] The present invention relates to the field of inkjet printing technology, and in particular to a method, device, equipment and storage medium for printing double-sided images with a row of nozzles. Background Art

[0002] Inkjet printing technology converts ink into droplets through a nozzle and sprays them onto a print medium, creating an image product. This non-contact technology offers advantages such as high printing speed, minimal pollution, vibrant images, long image shelf life, and adaptability to a variety of print media. It has been widely adopted in fields such as outdoor photography, advertising, office supplies, and proofing. Existing inkjet printing equipment can print on standard media such as letter paper, as well as various transparent and translucent media such as acrylic and glass.

[0003] On transparent or translucent materials, it is possible to print images on both sides, not only on one side, but also on both sides. The specific method is to add a white ink layer between the two color images to separate them and avoid the two images affecting each other. Figure 1 The prior art printing method for allowing images to be visible on both sides is as follows: the multiple printing units 100 are divided into three staggered rows for installation, with the printing units in the first row responsible for printing the reverse side of the image, the printing units in the second row responsible for printing white ink, and the printing units in the third row responsible for printing the front side of the image. This method requires staggered installation of the nozzles, which requires a larger installation space and results in a relatively large printer. In addition, during the printing process, the print medium must move relative to the nozzles along the secondary scanning direction of the nozzles, i.e., the paper is fed, which affects the printing effect by the paper feeding accuracy. Figure 2 As shown, a new nozzle installation method is proposed to address the defects of the existing technology. Multiple nozzles are installed in the same row along the main scanning direction. This saves space and improves the utilization rate of the nozzles in the nozzle. However, how to control the printing of the nozzles arranged in the same row so that images can be seen on both sides is a problem that needs to be solved. Summary of the Invention

[0004] The embodiments of the present invention provide a method, device, equipment and storage medium for printing double-sided images with nozzles arranged in the same row, so as to solve the technical problem in the prior art that nozzles arranged in the same row cannot achieve double-sided printing.

[0005] In a first aspect, an embodiment of the present invention provides a method for printing double-sided images with a row of print heads, the method comprising:

[0006] Obtaining the covering order of each covering layer of the image to be printed;

[0007] Determining an inkjet unit for printing each covering layer and an inkjet order of each inkjet unit according to the covering order of each covering layer of the image to be printed;

[0008] determining an ink jetting state of each ink jetting unit each time it scans once along the main scanning direction according to the ink jetting sequence;

[0009] Controlling the corresponding inkjet unit to perform inkjet printing on the printing medium according to the inkjet state;

[0010] Among them, the inkjet state includes two states: ink output and no ink output. The covering layer includes an intermediate layer and a color image layer. The inkjet unit includes an intermediate layer printing unit for printing the intermediate layer and a color layer printing unit for printing the color image layer. The printing medium is a transparent medium or a translucent medium.

[0011] Preferably, the method for determining the inkjet unit for printing each covering layer and the inkjet order of each inkjet unit according to the covering order of each covering layer of the image to be printed is:

[0012] Each covering layer corresponds to at least one inkjet unit for printing the covering layer. The inkjet unit corresponding to the covering layer covering the printing medium first sprays ink first, and the inkjet unit corresponding to the covering layer covering the printing medium later sprays ink later.

[0013] Preferably, the covering layer of the image to be printed includes two layers of the color image layers and at least one intermediate layer, the two layers of the color image layers are respectively located on both sides of the intermediate layer, the first color image layer of the two layers of the color image layers covers the printing medium, the first color image layer can be viewed through the printing medium, and the second color image layer of the two layers of the color image layers covers the intermediate layer and is opposite to the first color image.

[0014] Preferably, the covering layer includes a first color image layer, a first intermediate layer, and a second color image layer that are sequentially covered, the first color image layer and the second color image layer are formed by covering a combination of cyan ink, magenta ink, yellow ink, and black ink, the first intermediate layer is formed by covering white ink, the inkjet printing scanning mode is a multi-pass scanning mode, and determining the inkjet state of each inkjet unit each time it scans along the main scanning direction according to the inkjet sequence includes:

[0015] During printing of the first color image layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first color image is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink;

[0016] During the printing of the first intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink;

[0017] During printing of the second color image layer, each time the inkjet unit scans along the main scanning direction, the inkjet unit corresponding to the second color image layer is in ink ejection state, and the other inkjet units are in no ink ejection state.

[0018] Preferably, the covering layer includes a first color image layer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a second color image layer, which are sequentially covered. The first color image layer and the second color image layer are formed by covering a combination of cyan ink, magenta ink, yellow ink, and black ink. The first intermediate layer and the third intermediate layer are formed by covering a combination of white ink. The second intermediate layer is formed by covering a combination of black ink. The inkjet printing scanning mode is a multi-pass scanning mode. The determining of the inkjet state of each inkjet unit during each scan along the main scanning direction according to the inkjet sequence includes:

[0019] During printing of the first color image layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first color image layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink;

[0020] During the printing of the first intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink;

[0021] During the printing of the second intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the second intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink;

[0022] During the printing of the third intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet units corresponding to the first three intermediate layers are in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink;

[0023] During printing of the second color image layer, each time the inkjet unit scans along the main scanning direction, the inkjet unit corresponding to the second color image layer is in ink ejection state, and the other inkjet units are in no ink ejection state.

[0024] Preferably, the scanning mode of inkjet printing is a one-pass scanning mode, and the covering layer includes a first color image layer, a first intermediate layer, and a second color image layer covered in sequence, the first color image layer and the second color image layer are formed by covering a combination of cyan ink, magenta ink, yellow ink, and black ink, and the first intermediate layer is formed by covering white ink. The inkjet units are arranged along the scanning direction according to the covering order of the corresponding covering layers, and the method for determining the inkjet state of each inkjet unit each time it scans along the main scanning direction according to the inkjet order is: during each scanning of the inkjet unit along the main scanning direction, the inkjet state of the inkjet unit corresponding to each covering layer is ink discharge.

[0025] Preferably, the scanning mode of inkjet printing is a one-pass scanning mode, and the covering layer includes a first color image layer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a second color image layer covered in sequence, the first color image layer and the second color image layer are formed by covering a combination of cyan ink, magenta ink, yellow ink, and black ink, the first intermediate layer and the third intermediate layer are formed by covering a combination of white ink, and the second intermediate layer is formed by covering a combination of black ink, the inkjet units are arranged along the scanning direction according to the covering order of the corresponding covering layers, and the method for determining the inkjet state of each inkjet unit each time it scans along the main scanning direction according to the inkjet order is: during each scanning of the inkjet unit along the main scanning direction, the inkjet state of the inkjet unit corresponding to each covering layer is ink discharge.

[0026] In a second aspect, the present invention provides a device for printing double-sided images with a row of nozzles, the device comprising:

[0027] A covering order acquisition module, the covering order acquisition module is used to obtain the covering order of each covering layer of the image to be printed;

[0028] an inkjet unit and inkjet order determination module, the inkjet printing and inkjet order determination module being used to determine the inkjet unit for printing each covering layer and the inkjet order of each inkjet unit according to the covering order of each covering layer of the image to be printed;

[0029] an inkjet state determination module, the inkjet state determination module being configured to determine, according to the inkjet sequence, an inkjet state of each inkjet unit each time it scans once along the main scanning direction;

[0030] an inkjet printing module, configured to control a corresponding inkjet unit to perform inkjet printing on a printing medium according to the inkjet state;

[0031] Among them, the inkjet state includes two states: ink output and no ink output. The covering layer includes an intermediate layer and a color image layer. The inkjet unit includes an intermediate layer printing unit for printing the intermediate layer and a color layer printing unit for printing the color image layer. The printing medium is a transparent medium or a translucent medium.

[0032] In a third aspect, the present invention provides a device for printing double-sided images with the same row of nozzles, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, which, when executed by the processor, implement the method of the first aspect of the above embodiment.

[0033] In a fourth aspect, the present invention provides a storage medium having computer program instructions stored thereon, which implement the method of the first aspect of the above-mentioned embodiment when the computer program instructions are executed by a processor.

[0034] In summary, the method, apparatus, device, and storage medium for printing double-sided images with a row of nozzles provided by the present invention associate each inkjet unit with each covering layer of the image to be printed, and determine the inkjet order of the corresponding inkjet unit according to the covering order of each covering layer of the printed image. Furthermore, the inkjet order determines the ink discharge state of each inkjet unit each time the inkjet unit scans along the main scanning direction. This allows the inkjet units of the printing device to spray ink according to the order of covering during the inkjet printing process, covering the reverse image on the first layer, the middle barrier layer on top of the reverse image, and finally the front image on top of the middle barrier layer, ultimately printing a double-sided visible printed image on a transparent or translucent medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 This is a schematic diagram of a nozzle arrangement method in the prior art.

[0037] Figure 2 This is a schematic diagram of a printing unit consisting of multiple nozzles arranged in a row.

[0038] Figure 3 A schematic diagram of a printing unit consisting of one or more columns of nozzles in a single printhead.

[0039] Figure 4 This is a schematic diagram of a printing unit consisting of a single nozzle.

[0040] Figure 5This is a flow chart of a method for printing double-sided images using nozzles in the same row according to embodiment 1 of the present invention.

[0041] Figure 6 This is a flowchart of determining the ink ejection state of each ink ejection unit each time it scans once along the main scanning direction according to the ink ejection order in embodiment 1 of the present invention.

[0042] Figure 7 It is a structural schematic diagram of the arrangement of the inkjet units in Example 1 of the present invention.

[0043] Figure 8 This is a flowchart of determining the ink ejection state of each ink ejection unit each time it scans once along the main scanning direction according to the ink ejection order in embodiment 2 of the present invention.

[0044] Figure 9 It is a structural schematic diagram of the arrangement of the inkjet units in Example 2 of the present invention.

[0045] Figure 10 3 is a schematic structural diagram of a device for printing double-sided images with nozzles in the same row according to embodiment 3 of the present invention.

[0046] Figure 11 1 is a schematic structural diagram of a device for printing double-sided images with nozzles in the same row according to embodiment 4 of the present invention. DETAILED DESCRIPTION

[0047] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and Examples. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by illustrating examples of the present invention.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0049] Inkjet printing technology involves ejecting ink droplets onto a print medium through nozzles on a printhead to create images or text. This technology primarily includes one-pass printing and multi-pass printing. One-pass printing involves the inkjet unit performing a single horizontal scan, or scan in the main scanning direction, to complete the print. Multi-pass printing involves the inkjet unit performing multiple horizontal scans to complete the print.

[0050] The present invention matches each inkjet unit with each covering layer of the image to be printed, and determines the inkjet order of the corresponding inkjet unit according to the covering order of each covering layer of the printed image. The inkjet order also determines the ink discharge state of each inkjet unit each time the inkjet unit scans once along the main scanning direction. In this way, the inkjet units of the printing device can spray ink according to the order of covering during the inkjet printing process, covering the reverse image on the first layer, covering the middle partition layer on the reverse image, and finally covering the front image on the middle partition layer, and finally printing a double-sided print image on a transparent or translucent medium. Because this embodiment uses the method of arranging each inkjet unit in the same row to achieve double-sided printing, it saves space and improves the utilization rate of the nozzles in the printhead. At the same time, the printing effect is not affected by paper feeding, so the image accuracy of double-sided printing is also significantly improved.

[0051] Example 1

[0052] See Figure 5 The embodiment of the present invention provides a method for printing double-sided images with a row of nozzles, the method specifically comprising the following steps:

[0053] S1, obtaining the covering order of each covering layer of the image to be printed;

[0054] Duplex-printed images often include multiple overlay layers. In this embodiment, the overlay layers of the image to be printed include two color image layers and at least one intermediate layer. The two color image layers are located on either side of the intermediate layer. The first color image layer of the two color image layers overlays the print medium, visible through the print medium. The second color image layer of the two color image layers overlays the intermediate layer, facing the first color image layer. The first color image layer forms the reverse image, while the second color image layer forms the front image. The intermediate layer acts as a barrier, preventing the first and second color image layers from interfering with each other.

[0055] In the thickness direction of the image to be printed, the covering layer closer to the printing medium is in the front covering order, and the covering layer farther from the printing medium is in the back covering order.

[0056] S2. determining the inkjet unit for printing each covering layer and the inkjet order of each inkjet unit according to the covering order of each covering layer of the image to be printed;

[0057] like Figure 2 As shown, in this embodiment, the inkjet unit can be a plurality of nozzles arranged in the same row along the main scanning direction. Figure 2 The inkjet unit 160 is an inkjet unit formed by three nozzles arranged in the same row, and the inkjet unit 170 is an inkjet unit formed by two nozzles arranged in the same row; Figure 3 As shown, in this embodiment, the inkjet unit can also be a single nozzle head arranged in one or more rows along the main scanning direction. Figure 3 The inkjet unit 130, the inkjet unit 140, and the inkjet unit 150 are all inkjet units consisting of two columns of nozzles in the same row; Figure 4 As shown, the inkjet unit in this embodiment can also be a nozzle. Figure 4 Both inkjet unit 110 and inkjet unit 120 are inkjet units formed by a single nozzle. In this embodiment, all inkjet units are arranged in the same row, i.e., at the same horizontal position, along the main scanning direction. The inkjet units include an intermediate layer printing unit for printing the intermediate layer and a color layer printing unit for printing the color image layer. The inkjet ejection order of each inkjet unit refers to the order in which each inkjet unit ejects ink within the same printing area of the print medium. In this embodiment, the order in which each inkjet unit ejects ink within any printing area of the print medium is the same.

[0058] Each covering layer corresponds to at least one inkjet unit for printing the covering layer. The inkjet unit corresponding to the covering layer covering the printing medium first sprays ink first, and the inkjet unit corresponding to the covering layer covering the printing medium later sprays ink later.

[0059] S3, determining the inkjet state of each inkjet unit when scanning once along the main scanning direction each time according to the inkjet sequence;

[0060] The inkjet state includes two states: ink ejection and no ink ejection. To ensure a correct inkjet order, each inkjet unit is determined to eject ink in each scan according to the inkjet order each time the inkjet unit scans along the main scanning direction.

[0061] like Figure 6As shown, as an example, the inkjet printing scanning method is a multi-pass scanning method. The covering layer of this embodiment includes a first color image layer, a first intermediate layer, and a second color image layer, which are sequentially covered. The first and second color image layers are formed by covering with a combination of cyan ink, magenta ink, yellow ink, and black ink, and the first intermediate layer is formed by covering with white ink. Since the inkjet unit corresponding to the covering layer that covers the printing medium first sprays ink first, and the inkjet unit corresponding to the covering layer that covers the printing medium later sprays ink later, the inkjet unit corresponding to the covering layer that covers the printing medium later sprays ink later. Therefore, the inkjet state of each inkjet unit during each scan along the main scanning direction according to the inkjet sequence includes:

[0062] S311. During printing of the first color image layer, each time the inkjet unit scans along the main scanning direction, the inkjet unit corresponding to the first color image layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink.

[0063] S312. During printing of the first intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink.

[0064] S313. During printing of the second color image layer, each time the inkjet unit scans along the main scanning direction, the inkjet unit corresponding to the second color image layer is in the inkjet state of ejecting ink, and the inkjet states of the remaining inkjet units are not ejecting ink.

[0065] Below Figure 7 The printing unit arrangement in the embodiment uses 2PASS to print the first color image layer, 2PASS to print the first intermediate layer, and 2PASS to print the second color image layer, a total of 6PASS as an example for explanation.

[0066] Figure 7 It includes three groups of nozzles P1, P2, and P3, among which the P1 color nozzle is used as the inkjet unit corresponding to the first color image, the P2 white nozzle is used as the inkjet unit corresponding to the first intermediate layer, and the P3 color nozzle is used as the inkjet unit corresponding to the first color image. The printing direction is Figure 7 From right to left in:

[0067] a. 1st pass: The P1 color printhead is in ink-discharging state, the P2 white printhead and the P3 color printhead are in ink-discharging state, and the P1 color printhead prints the first color image layer data, the 1st pass data;

[0068] b. 2nd pass: The P1 color nozzle inkjet status is ink discharge, the P2 white nozzle and the P3 color nozzle inkjet status are not ink discharge, and the P1 color nozzle prints the first color image layer data 2nd pass data;

[0069] c. 3rd pass: The P2 white printhead is in ink-out status, the P1 color printhead and the P3 color printhead are in ink-out status, and the P2 white printhead prints the first intermediate layer data, the 1st pass data;

[0070] d. 4th pass: The P2 white nozzle is in inkjet mode, the P1 color nozzle and the P3 color nozzle are not in inkjet mode, and the P2 white nozzle prints the first intermediate layer data, the 2nd pass data;

[0071] e. 5th pass: The P3 color nozzle inkjet status is ink discharge, the P1 color nozzle and the P2 white nozzle inkjet status are not ink discharge, and the P3 color nozzle prints the second color image layer data 1st pass data;

[0072] f. 6th PASS: The P3 color nozzle inkjet status is ink output, the P1 color nozzle and the P2 white nozzle inkjet status are not ink output, and the P3 color nozzle prints the second color image layer data 2nd PASS data.

[0073] As another example of this embodiment, the covering layer includes a first color image layer, a first intermediate layer, and a second color image layer covered in sequence, the first color image layer and the second color image layer being formed by covering a combination of cyan ink, magenta ink, yellow ink, and black ink, the first intermediate layer being formed by covering white ink, the color layer printing unit including a first color ink unit and a second color ink unit, the intermediate layer printing unit including a first white ink unit, the first color image layer corresponding to the first color ink unit and the second color ink unit, the first intermediate layer corresponding to the first white ink unit, the scanning mode of the inkjet printing is a multi-pass scanning mode, the inkjet units are arranged along the scanning direction according to the covering order of the corresponding covering layers, and determining the inkjet state of each inkjet unit each time it scans along the main scanning direction according to the inkjet sequence includes:

[0074] During the last scanning process of the inkjet unit along the main scanning direction to form the first color image layer, the first white ink unit is in an inkjet state of discharging ink, the inkjet unit of the first color ink unit and the second color ink unit that first reaches the same printing area along the main scanning direction is in an inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; during the scanning processes of the inkjet unit along the main scanning direction to form the first color image layer except the last one, the first color ink unit and / or the second color ink unit is in an inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink;

[0075] During the first and last scanning processes of the inkjet unit along the main scanning direction to form the first intermediate layer, the first white ink unit is in an inkjet state of discharging ink, the inkjet unit of the first color ink unit and the second color ink unit that arrives at the same printing area earlier along the main scanning direction is in an inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; during the scanning processes of the inkjet unit along the main scanning direction to form the first intermediate layer except for the first and last scanning processes, the white ink unit is in an inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink;

[0076] During the first scanning along the main scanning direction of the inkjet unit to form the second color image layer, the inkjet state of the first white ink unit is ink discharging, the inkjet state of the inkjet unit among the first color ink unit and the second color ink unit that arrives at the same printing area after following the main scanning direction is ink discharging, and the inkjet state of the remaining inkjet units is not ink discharging; during the scanning along the main scanning direction for the inkjet unit to form the first color image layer except the first time, the inkjet state of the first color ink unit and / or the second color ink unit is ink discharging, and the inkjet state of the remaining inkjet units is not ink discharging.

[0077] Below Figure 7 The arrangement of the printing units in the embodiment is described by taking 3PASS to print the first color image layer, 3PASS to print the first intermediate layer, and 3PASS to print the second color image layer as an example.

[0078] The figure includes three groups of printheads: P1, P2, and P3. The P1 color printhead is used as the inkjet unit corresponding to the first color image, the P2 white printhead is used as the inkjet unit corresponding to the first intermediate layer, and the P3 color printhead is used as the inkjet unit corresponding to the first color image. The printing direction is from right to left in the figure:

[0079] a. 1st pass: The P1 color printhead is in ink-discharging state, the P2 white printhead and the P3 color printhead are in ink-discharging state, and the P1 color printhead prints the first color image layer data, the 1st pass data;

[0080] b. 2nd pass: The P1 color nozzle inkjet status is ink discharge, the P2 white nozzle and the P3 color nozzle inkjet status are not ink discharge, and the P1 color nozzle prints the first color image layer data 2nd pass data;

[0081] c. 3rd pass: The P1 color printhead and the P2 white printhead are in ink-discharging state, the P3 color printhead is in ink-discharging state, the P1 color printhead prints the first color image layer data (3rd pass data), and the P2 white printhead prints the first intermediate layer data (1st pass data);

[0082] d. 4th pass: The P2 white nozzle is in inkjet mode, the P1 color nozzle and the P3 color nozzle are not in inkjet mode, and the P2 white nozzle prints the first intermediate layer data, the 2nd pass data;

[0083] e. 5th pass: The P2 white nozzle and the P3 color nozzle are in ink discharge state, the P1 color nozzle is in ink discharge state, the P2 white nozzle prints the first intermediate layer data 3rd pass data, and the P3 color nozzle prints the second color image layer data 1st pass data;

[0084] f. 6th pass: P3 color nozzle inkjet status is ink, P1 color nozzle and P2 white nozzle inkjet status is not ink, P3 color nozzle prints the second color image layer data 2nd pass data;

[0085] g. 7th pass: P3 color nozzle inkjet status is ink, P1 color nozzle and P2 white nozzle inkjet status is not ink, P3 color nozzle prints the second color image layer data 3rd pass data;

[0086] The printing method of this example fully utilizes the characteristic that the arrangement order of the inkjet units along the scanning direction is associated with the covering order of their corresponding covering layers. In the process of multi-pass printing of double-sided images, the middle layer image is printed simultaneously during the scanning process of the last scan to print the back image, and the front image is printed simultaneously during the scanning process of the last scan to print the middle layer image. This can form a double-sided image and reduce the total number of scans required, saving printing time.

[0087] As another example of this embodiment, the scanning mode of inkjet printing is a one-pass scanning mode, and the covering layer includes a first color image layer, a first intermediate layer, and a second color image layer covered in sequence, the first color image layer and the second color image layer are formed by covering a combination of cyan ink, magenta ink, yellow ink, and black ink, and the first intermediate layer is formed by covering white ink. The inkjet units are arranged along the scanning direction according to the covering order of the corresponding covering layers, and the method for determining the inkjet state of each inkjet unit each time it scans along the main scanning direction according to the inkjet order is: during each scanning of the inkjet unit along the main scanning direction, the inkjet state of the inkjet unit corresponding to each covering layer is ink discharge.

[0088] The arrangement of the inkjet unit is as follows Figure 7 As shown, Figure 7It includes three groups of nozzles P1, P2, and P3. Among them, the P1 color nozzle is used as the inkjet unit corresponding to the first color image, the P2 white nozzle is used as the inkjet unit corresponding to the first intermediate layer, and the P3 color nozzle is used as the inkjet unit corresponding to the first color image. The three groups of nozzles P1, P2, and P3 are arranged in the same row from left to right. The printing direction is Figure 7 From right to left in:

[0089] During a single scan along the main scanning direction, all three groups of printheads, P1, P2, and P3, produce ink. The P1 color printhead prints data for the first color image layer, the P2 white printhead prints data for the first intermediate layer, and the P3 color printhead prints data for the second color image layer. This example exploits the correlation between the order in which the inkjet units are arranged along the scanning direction and the order in which their corresponding cover layers are covered, allowing a double-sided image to be formed in a single scan.

[0090] S4. Control the corresponding inkjet unit to perform inkjet printing on the printing medium according to the inkjet state.

[0091] When the inkjet status of each inkjet unit is determined, the printing data is sent to each inkjet unit. The printing device controls the inkjet unit to scan above the printing medium along the main scanning direction, and according to the inkjet status, each inkjet unit can print data by spraying ink or not spraying ink during each scan.

[0092] Example 2

[0093] In this embodiment, the covering layer includes a first color image layer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a second color image layer covered in sequence. The first color image layer and the second color image layer are formed by covering a combination of cyan ink, magenta ink, yellow ink, and black ink. The first intermediate layer and the third intermediate layer are formed by covering white ink, and the second intermediate layer is formed by covering a combination of black ink.

[0094] like Figure 8 As shown in the figure, as one example, when using multi-pass scanning to print the above double-sided image,

[0095] Determining the inkjet state of each inkjet unit when scanning once along the main scanning direction according to the inkjet sequence includes:

[0096] S321. During printing of the first color image layer, each time the inkjet unit scans along the main scanning direction once, the inkjet unit corresponding to the first color image layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink.

[0097] S322: During printing of the first intermediate layer, each time the inkjet unit scans along the main scanning direction, the inkjet unit corresponding to the first intermediate layer is in the inkjet state of discharging ink, and the inkjet units corresponding to the first intermediate layer are in the inkjet state of not discharging ink.

[0098] S323. During printing of the second intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the second intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink.

[0099] S324. During printing of the third intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the third intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink.

[0100] S325. During printing of the second color image layer, each time the inkjet unit scans along the main scanning direction, the inkjet unit corresponding to the second color image layer is in the inkjet state of ejecting ink, and the inkjet states of the remaining inkjet units are not ejecting ink.

[0101] Below Figure 9 The printing unit arrangement method in the embodiment adopts 2PASS to print the first color image layer, 2PASS to print the first intermediate layer, 2PASS to print the second intermediate layer, 2PASS to print the third intermediate layer, and 2PASS to print the second color image layer, a total of 10PASS is used as an example for explanation.

[0102] Figure 9 The printhead includes five groups of printheads: H1, H2, H3, H4, and H5. The H1 color printhead is used as the inkjet unit for the first color image layer, the H2 white printhead is used as the inkjet unit for the first intermediate layer, the H3 black printhead is used as the inkjet unit for the second intermediate layer, the H4 white printhead is used as the inkjet unit for the third intermediate layer, and the H5 color printhead is used as the inkjet unit for the second color image layer. The printing direction is from right to left as shown in Figure 9:

[0103] a. 1st pass: The H1 color printhead is in ink-discharging state, while the H2 white printhead, H3 black printhead, H4 white printhead, and H5 color printheads are in ink-discharging state. The H1 color printhead prints the first color image layer data (1st pass data).

[0104] b. 2nd pass: The H1 color printhead is in ink-discharging state, while the H2 white printhead, H3 black printhead, H4 white printhead, and H5 color printhead are in ink-discharging state. The H1 color printhead prints the first color image layer data, the 2nd pass data.

[0105] c. 3rd pass: The H2 white printhead is in ink-flowing state, while the H1 color printhead, H3 black printhead, H4 white printhead, and H5 color printhead are in ink-flowing state. The H2 white printhead prints the first intermediate layer data, the 1st pass data.

[0106] d. 4th pass: The H2 white printhead is in ink-discharging state, while the H1 color printhead, H3 black printhead, H4 white printhead, and H5 color printhead are not in ink-discharging state. The H2 white printhead prints the first intermediate layer data and the second pass data.

[0107] e. 5th pass: The H3 black printhead is in ink-out status, while the H1 color printhead, H2 white printhead, H4 white printhead, and H5 color printhead are in ink-out status. The H3 black printhead prints the second intermediate layer data, the 1st pass data.

[0108] f. 6th pass: The H3 black nozzle is in ink-discharging state, while the H1 color nozzle, H2 white nozzle, H4 white nozzle, and H5 color nozzle are not in ink-discharging state. The H3 black nozzle prints the second intermediate layer data, the 2nd pass data.

[0109] g. 7th pass: The H4 white printhead is in ink-discharging state, the H1 color printhead, H2 white printhead, H3 black printhead, and H5 color printhead are in ink-discharging state, and the H4 white printhead prints the third intermediate layer data, the 1st pass data;

[0110] h. 8th pass: The H4 white printhead is in ink-flowing state, while the H1 color printhead, H2 white printhead, H3 black printhead, and H5 color printhead are in ink-flowing state. The H4 white printhead prints the third intermediate layer data (the 2nd pass data).

[0111] j. 9th pass: The H5 color printhead inkjet status is ink discharge, the H1 color printhead, H2 white printhead, H3 black printhead, and H4 white printhead inkjet status are not ink discharge, and the H5 color printhead prints the second color image layer data 1st pass data;

[0112] k. 10th PASS: The H5 color nozzle is in ink discharge state, while the H1 color nozzle, H2 white nozzle, H3 black nozzle, and H4 white nozzle are not in ink discharge state. The H5 color nozzle prints the second color image layer data, the 2nd PASS data.

[0113] As another example, when the one-pass scanning method is used to print the above-mentioned double-sided image, the inkjet units are arranged along the scanning direction according to the covering order of the corresponding covering layers. The method for determining the inkjet state of each inkjet unit each time it scans along the main scanning direction according to the inkjet order is: during each scan of the inkjet unit along the main scanning direction, the inkjet state of the inkjet unit corresponding to each covering layer is ink discharge.

[0114] The figure includes five groups of printheads, H1, H2, H3, H4, and H5. The H1 color printhead is the inkjet unit corresponding to the first color image layer, the H2 white printhead is the inkjet unit corresponding to the first middle layer, the H3 black printhead is the inkjet unit corresponding to the second middle layer, the H4 white printhead is the inkjet unit corresponding to the third middle layer, and the H5 color printhead is the inkjet unit corresponding to the second color image layer. The printing direction is from right to left in the figure. The five groups of printheads H1, H2, H3, H4, and H5 are arranged in the same row from left to right:

[0115] During a single scan along the main scanning direction, all five nozzle groups, H1, H2, H3, H4, and H5, produce ink. The H1 color nozzle prints data for the first color image layer, the H2 white nozzle prints data for the first intermediate layer, the H3 black nozzle prints data for the second intermediate layer, the H4 white nozzle prints data for the third intermediate layer, and the H5 color nozzle prints data for the second color image layer. This example exploits the correlation between the order of inkjet units along the scanning direction and the order of their corresponding cover layers, enabling the formation of a double-sided image in a single scan.

[0116] Example 3

[0117] See also Figure 10 An embodiment of the present invention provides a device for printing double-sided images with a row of nozzles, the device comprising:

[0118] A covering order acquisition module, the covering order acquisition module is used to obtain the covering order of each covering layer of the image to be printed;

[0119] an inkjet unit and inkjet order determination module, the inkjet printing and inkjet order determination module being used to determine the inkjet unit for printing each covering layer and the inkjet order of each inkjet unit according to the covering order of each covering layer of the image to be printed;

[0120] an inkjet state determination module, the inkjet state determination module being configured to determine, according to the inkjet sequence, an inkjet state of each inkjet unit each time it scans once along the main scanning direction;

[0121] an inkjet printing module, configured to control a corresponding inkjet unit to perform inkjet printing on a printing medium according to the inkjet state;

[0122] Among them, the inkjet state includes two states: ink output and no ink output. The covering layer includes an intermediate layer and a color image layer. The inkjet unit includes an intermediate layer printing unit for printing the intermediate layer and a color layer printing unit for printing the color image layer. The printing medium is a transparent medium or a translucent medium.

[0123] Example 4

[0124] In addition, combined Figure 11 The method for printing double-sided images with nozzles in a same row according to the embodiment of the present invention can be implemented by a device for printing double-sided images with nozzles in a same row. Figure 11 The figure shows a hardware structure diagram of a device for printing double-sided images with nozzles in the same row provided by an embodiment of the present invention.

[0125] The apparatus for printing double-sided images with nozzles in the same row may include a processor 401 and a memory 402 storing computer program instructions.

[0126] Specifically, the processor 401 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiment of the present invention.

[0127] Memory 402 may include a large capacity memory for data or instructions. By way of example and not limitation, memory 402 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 402 may include removable or non-removable (or fixed) media. Where appropriate, memory 402 may be inside or outside the data processing device. In a specific embodiment, memory 402 is a non-volatile solid-state memory. In a specific embodiment, memory 402 includes a read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0128] The processor 401 reads and executes computer program instructions stored in the memory 402 to implement any one of the data addressing methods for random area printing in the above embodiments.

[0129] In one example, the apparatus for printing double-sided images with a row of nozzles may further include a communication interface 403 and a bus 410. Figure 6 As shown, the processor 401 , the memory 402 , and the communication interface 403 are connected via a bus 410 and communicate with each other.

[0130] The communication interface 403 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiment of the present invention.

[0131] Bus 410 includes hardware, software or both, and the parts of same row nozzle printing double-sided image are coupled to each other.For example, but not limitation, bus can include accelerated graphics port (AGP) or other graphics bus, enhanced industry standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industry standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations.In suitable cases, bus 410 can include one or more buses.Although the embodiment of the present invention describes and shows specific bus, the present invention considers any suitable bus or interconnection.

[0132] Example 5

[0133] In addition, in conjunction with the method for printing double-sided images with a row of nozzles in the above-described embodiments, embodiments of the present invention may provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when executed by a processor, the computer program instructions implement any of the methods for printing double-sided images with a row of nozzles in the above-described embodiments.

[0134] The above is a detailed introduction to the method, device, equipment and storage medium for printing double-sided images with the same row of nozzles provided in the embodiments of the present invention.

[0135] It should be understood that the present invention is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, a detailed description of known methods is omitted. In the above embodiments, several specific steps are described and illustrated as examples. However, the method of the present invention is not limited to the specific steps described and illustrated. Those skilled in the art may make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present invention.

[0136] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in unit, a function card or the like. When implemented in software, the elements of the present invention are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0137] It should also be noted that the exemplary embodiments described herein describe methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the steps described above. In other words, the steps may be performed in the order described in the embodiments, or in a different order, or several steps may be performed simultaneously.

[0138] The above description is only a specific embodiment of the present invention. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention.

Claims

1. A method for printing double-sided images using a row of print heads, characterized in that: The method comprises: Obtaining the covering order of each covering layer of the image to be printed; Determining an inkjet unit for printing each covering layer and an inkjet order of each inkjet unit according to the covering order of each covering layer of the image to be printed; determining an ink jetting state of each ink jetting unit each time it scans once along the main scanning direction according to the ink jetting sequence; Controlling the corresponding inkjet unit to perform inkjet printing on the printing medium according to the inkjet state; The inkjet state includes two states: ink-ejecting and ink-not-ejecting; the covering layer includes an intermediate layer and a color image layer; the inkjet unit includes an intermediate layer printing unit for printing the intermediate layer and a color layer printing unit for printing the color image layer; and the printing medium is a transparent medium or a semi-transparent medium; The inkjet units are arranged in the same row along the main scanning direction; The covering layer of the image to be printed includes two color image layers and at least one intermediate layer, the two color image layers are respectively located on both sides of the intermediate layer, a first color image layer of the two color image layers covers the printing medium, and a second color image layer of the two color image layers covers the intermediate layer and is opposite to the first color image layer; When the inkjet printing scanning mode is a multi-pass scanning mode, determining the inkjet state of each inkjet unit each time it scans once along the main scanning direction according to the inkjet sequence includes: During printing of the first color image layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first color image layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; During the printing of the first intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; During printing of the second color image layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the second color image layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; Alternatively, when the inkjet printing scanning mode is a one-pass scanning mode, the covering layer includes a first color image layer, a first intermediate layer, and a second color image layer covered in sequence, the first color image layer and the second color image layer being formed by covering a combination of cyan ink, magenta ink, yellow ink, and black ink, and the first intermediate layer being formed by covering white ink, the inkjet units are arranged along the scanning direction according to the covering order of the corresponding covering layers, and the method for determining the inkjet state of each inkjet unit during each scan along the main scanning direction according to the inkjet sequence is as follows: during each scan along the main scanning direction, the inkjet unit corresponding to each covering layer is in the inkjet state of discharging ink; Alternatively, when the scanning mode of inkjet printing is a one-pass scanning mode, the covering layer includes a first color image layer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a second color image layer covered in sequence, the first color image layer and the second color image layer are formed by covering a combination of cyan ink, magenta ink, yellow ink, and black ink, the first intermediate layer and the third intermediate layer are formed by covering a combination of white ink, and the second intermediate layer is formed by covering a combination of black ink, the inkjet units are arranged along the scanning direction according to the covering order of the corresponding covering layers, and the method for determining the inkjet state of each inkjet unit each time it scans along the main scanning direction according to the inkjet order is: during each scanning of the inkjet unit along the main scanning direction, the inkjet state of the inkjet unit corresponding to each covering layer is ink discharge.

2. The method for printing double-sided images with the same row of nozzles according to claim 1, characterized in that: The method for determining the inkjet unit for printing each covering layer and the inkjet order of each inkjet unit according to the covering order of each covering layer of the image to be printed is: Each covering layer corresponds to at least one inkjet unit for printing the covering layer. The inkjet unit corresponding to the covering layer covering the printing medium first sprays ink first, and the inkjet unit corresponding to the covering layer covering the printing medium later sprays ink later.

3. The method for printing double-sided images with the same row of nozzles according to claim 2, characterized in that: The first color image layer can be viewed through the printing medium. The second color image layer of the two color image layers covers the middle layer and is opposite to the first color image layer.

4. The method for printing double-sided images with nozzles in the same row according to claim 3, characterized in that: The covering layer includes a first color image layer, a first intermediate layer and a second color image layer covered in sequence. The first color image layer and the second color image layer are formed by covering a combination of cyan ink, magenta ink, yellow ink and black ink, and the first intermediate layer is formed by covering white ink.

5. The method for printing double-sided images with nozzles in the same row according to claim 3, characterized in that: The covering layer includes a first color image layer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a second color image layer covered in sequence, the first color image layer and the second color image layer are formed by covering a combination of cyan ink, magenta ink, yellow ink, and black ink, the first intermediate layer and the third intermediate layer are formed by covering a combination of white ink, and the second intermediate layer is formed by covering a combination of black ink. The scanning mode of inkjet printing is a multi-pass scanning mode, and determining the inkjet state of each inkjet unit each time it scans along the main scanning direction according to the inkjet sequence includes: During printing of the first color image layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first color image layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; During the printing of the first intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; During the printing of the second intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the second intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; During the printing of the third intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the third intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; During printing of the second color image layer, each time the inkjet unit scans along the main scanning direction, the inkjet unit corresponding to the second color image layer is in ink ejection state, and the other inkjet units are in no ink ejection state.

6. A device for printing double-sided images with the same row of nozzles, characterized in that: The device comprises: A covering order acquisition module, the covering order acquisition module is used to obtain the covering order of each covering layer of the image to be printed; an inkjet unit and inkjet order determination module, the inkjet unit and inkjet order determination module being used to determine the inkjet unit for printing each covering layer and the inkjet order of each inkjet unit according to the covering order of each covering layer of the image to be printed; an inkjet state determination module, the inkjet state determination module being configured to determine, according to the inkjet sequence, an inkjet state of each inkjet unit each time it scans once along the main scanning direction; an inkjet printing module, configured to control a corresponding inkjet unit to perform inkjet printing on a printing medium according to the inkjet state; The inkjet state includes two states: ink ejection and ink non-emission; the cover layer includes an intermediate layer and a color image layer; the inkjet unit includes an intermediate layer printing unit for printing the intermediate layer and a color layer printing unit for printing the color image layer; and the printing medium is a transparent medium or a semi-transparent medium; The inkjet units are arranged in the same row along the main scanning direction; The covering layer of the image to be printed includes two color image layers and at least one intermediate layer, the two color image layers are respectively located on both sides of the intermediate layer, a first color image layer of the two color image layers covers the printing medium, and a second color image layer of the two color image layers covers the intermediate layer and is opposite to the first color image layer; When the inkjet printing scanning mode is a multi-pass scanning mode, determining the inkjet state of each inkjet unit each time it scans once along the main scanning direction according to the inkjet sequence includes: During printing of the first color image layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first color image layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; During the printing of the first intermediate layer, each time the inkjet unit scans once along the main scanning direction, the inkjet unit corresponding to the first intermediate layer is in the inkjet state of discharging ink, and the inkjet states of the remaining inkjet units are not discharging ink; During printing of the second color image layer, each time the inkjet unit scans along the main scanning direction, the inkjet unit corresponding to the second color image layer is in ink ejection state, and the other inkjet units are in no ink ejection state.

7. Equipment for printing double-sided images with the same row of nozzles, characterized in that: include: At least one processor, at least one memory, and computer program instructions stored in the memory, which implement the method according to any one of claims 1 to 5 when the computer program instructions are executed by the processor.

8. A storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the method according to any one of claims 1 to 5 is implemented.

Images