CN113858810B

CN113858810B - Method, device, equipment and medium for controlling nozzles in multi-nozzle splicing overlapping area

Info

Publication number: CN113858810B
Application number: CN202010613725.3A
Authority: CN
Inventors: 张潮; 谢尧斌; 陈艳
Original assignee: Senda Shenzhen Technology Co Ltd
Current assignee: Senda Shenzhen Technology Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2022-12-09
Anticipated expiration: 2040-06-30
Also published as: CN113858810A

Abstract

The invention relates to the technical field of ink-jet printing, in particular to a method, a device, equipment and a medium for controlling nozzles in a multi-nozzle splicing overlapping area. The method comprises the following steps: acquiring the position of a nozzle to be closed in a splicing and overlapping area of a first spray head and a second spray head; and closing the corresponding nozzle during printing according to the position of the nozzle to be closed. According to the invention, the nozzle positioned in the splicing overlapping area of the first nozzle and the second nozzle is closed, so that the black channel in the area below the splicing overlapping area of the nozzles on the printing medium can be prevented, and the printing effect of the image is improved.

Description

Method, device, equipment and medium for controlling nozzles in multi-nozzle splicing overlapping area

Technical Field

The invention relates to the technical field of ink-jet printing, in particular to a method, a device, equipment and a medium for controlling nozzles in a multi-nozzle splicing overlapping area.

Background

To achieve rapid printing of large-format images, large-format images are typically printed simultaneously using multiple jets. To achieve simultaneous printing of large images with multiple heads, multiple heads are typically mounted on a single workpiece. In the printing process, the workpiece provided with the nozzles is driven to move, and then the nozzles can be driven to move.

To achieve area printing of an image, the heads mounted on the workpiece are typically spliced together. In order to prevent the printing on the printing medium from forming a white channel without any ink dots, two adjacent splicing nozzles are usually overlapped. The area of the printing medium below the splicing and overlapping area of the two nozzles is usually printed by the two nozzles at the same time, and the color of the printed image is thickened and obviously layered with the images of other areas.

Disclosure of Invention

The embodiment of the invention provides a method, a device, equipment and a medium for controlling nozzles in a multi-nozzle splicing overlapping area. The multi-nozzle splicing overlapping area nozzle control method, the multi-nozzle splicing overlapping area nozzle control device, the multi-nozzle splicing overlapping area nozzle control equipment and the multi-nozzle splicing overlapping area nozzle control medium can prevent the color of an image in an area below the nozzle splicing overlapping area on a printing medium from being thickened to a certain extent and from being obviously layered with images in other areas.

In a first aspect, an embodiment of the present invention provides a method for controlling a nozzle in a multi-nozzle splicing overlap region, where the method includes:

acquiring the position of a nozzle to be closed in a splicing and overlapping area of a first spray head and a second spray head;

and closing the corresponding nozzle during printing according to the position of the nozzle to be closed.

In a second aspect, an embodiment of the present invention provides a multi-nozzle splicing overlap area nozzle control apparatus, where the apparatus includes:

the first acquisition module is used for acquiring the positions of the nozzles to be closed in the splicing and overlapping area of the first spray head and the second spray head;

and the closing module is used for closing the corresponding nozzle during printing according to the position of the nozzle to be closed.

In one embodiment the first obtaining module comprises: a first obtaining submodule and a second obtaining submodule;

the first acquisition submodule is used for acquiring a splicing overlapping area of the first spray head and the second spray head on the first spray head and/or the second spray head;

and the second acquisition submodule is used for acquiring the position of the nozzle to be closed in the splicing overlapping area according to the splicing overlapping area.

In one embodiment, the first obtaining module is further configured to obtain, in a nozzle area ejecting ink on one side of an ejection edge, positions of nozzles located in the splicing overlap area and having a vertical distance from the ejection edge that is smaller than or equal to a set distance, and record the obtained positions of the nozzles as the positions of the nozzles to be closed, where the ejection edge is a boundary between a nozzle area ejecting ink and a nozzle area not ejecting ink in the inkjet head.

In one embodiment, the first obtaining module further comprises: a third obtaining submodule and a fourth obtaining submodule;

the third obtaining submodule is used for obtaining a preset area in the splicing overlapping area in a spraying nozzle area on one side of the spraying edge, wherein the area is an area between the spraying edge and a virtual line, the vertical distance between the spraying edge and the virtual line is smaller than or equal to the set distance;

and the fourth obtaining submodule is used for obtaining the position of the nozzle to be closed in the preset area.

In one embodiment, the first acquiring module is further configured to acquire a position of a nozzle to be closed in the splice overlap region, and includes: acquiring the position of a nozzle positioned between the center line of the splicing overlapping area and the edge of a spray head in the splicing overlapping area, and recording the acquired position of the nozzle as the position of the nozzle to be closed, wherein the center line is parallel to the paper feeding direction.

In one embodiment, the apparatus further comprises: a second acquisition module;

the second acquiring module is used for acquiring the spraying edge of the sprayer in the splicing and overlapping area before the position of the nozzle to be closed in the splicing and overlapping area is acquired.

In one embodiment, the closing module is further configured to control, according to the position of the nozzle to be closed, the corresponding voltage in the driving waveform corresponding to the nozzle to be closed not to be output during printing.

In one embodiment, the shutdown module comprises: a seventh obtaining submodule and a modification submodule;

the seventh obtaining sub-module is configured to obtain, according to the position of the nozzle to be closed, print data for controlling the nozzle to be closed during printing;

and the modification submodule is used for processing the printing data, so that the ink output amount when printing is carried out according to the processed printing data is smaller than the ink output amount when printing is carried out according to the printing data before processing.

In a third aspect, an embodiment of the present invention provides a multi-nozzle splicing overlap area nozzle control apparatus, where the apparatus includes:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the multi-jet stitching overlap region nozzle control method described above.

In a fourth aspect, an embodiment of the present invention provides a computer storage medium having computer program instructions stored thereon, wherein the computer program instructions, when executed by a processor, implement the above-mentioned multi-nozzle splicing overlap region nozzle control method.

In summary, according to the method, the device, the apparatus, and the medium for controlling nozzles in a multi-nozzle splicing overlap area provided in the embodiments of the present invention, by closing the nozzles located in the first nozzle splicing overlap area and the second nozzle splicing overlap area, black channels can be prevented from occurring in an area below the nozzle splicing overlap area on the printing medium, and the printing effect of an image is improved.

Drawings

FIG. 1 is a schematic structural view of a first nozzle and a second nozzle according to the present invention;

FIG. 2 is a schematic diagram of the distribution of ink dots printed on a printing medium by using the first and second nozzles after splicing;

FIG. 3 is a schematic flow chart illustrating a method for controlling nozzles in an overlapping area of multiple nozzle assemblies according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of the steps of acquiring the positions of the nozzles to be closed according to the splicing overlapping region, which are included in the step S1 in FIG. 3;

FIG. 5 is a schematic flow chart showing steps involved in step S1 of FIG. 4 for obtaining a portion of nozzles at a nozzle splicing position;

fig. 6 is a flowchart of steps included in step S14 in fig. 5, which are used to obtain the positions of nozzles to be closed according to nozzle data between two adjacent nozzles to be closed;

FIG. 7 is a flowchart showing steps involved in step S2 of FIG. 1 for closing nozzles according to print data for controlling the nozzles;

FIG. 8 is a schematic connection diagram of a nozzle control device for a multi-nozzle splicing overlap region according to an embodiment of the present invention;

FIG. 9 is a schematic connection diagram of sub-modules included in the first capture module of FIG. 8 for capturing the positions of nozzles to be closed based on the splice overlap region;

FIG. 10 is a schematic connection diagram of sub-modules included in the first capture module of FIG. 8 capturing portions of nozzles at a showerhead stitching location;

fig. 11 is a schematic connection diagram of units included in the fourth acquiring submodule in fig. 10, which acquires positions of nozzles to be closed based on nozzle data between two adjacent nozzles to be closed;

FIG. 12 is a schematic diagram of the connection between a second capture module for capturing the spray edge provided by the present invention and the first capture module of FIG. 1;

FIG. 13 is a schematic diagram showing the connections of sub-modules included in the shutdown module of FIG. 8 for shutting down nozzles based on print data;

fig. 14 is a schematic connection diagram of components of a nozzle control device in a multi-nozzle splicing overlap region according to an embodiment of the invention.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Fig. 1 is a schematic structural view of a spliced spray head. As shown in FIG. 1, the lower portion of the first spray head 1-1 is overlapped with the upper portion of the second spray head 1-2. The part of the first spray head 1-1, which is positioned between the lower edge line 4 of the first spray head and the upper edge line 3 of the second spray head, is spliced and overlapped with the part of the second spray head 1-2, which is positioned between the lower edge line 4 of the first spray head and the upper edge line 3 of the second spray head. The centre line 5 is equal to the distance between the first head lower edge line 4 and the second head upper edge line 3. During printing, the nozzles 2 of the first head 1-1 above the midline 5 eject ink to the printing medium, and the nozzles 2 of the first head 1-1 below the midline 5 are closed. The nozzles 2 of the second head 1-2 located at the lower portion of the central line 5 eject ink toward the printing medium, and the nozzles 2 of the second head 1-2 located at the upper portion of the central line 5 are closed. By closing the nozzles 2 of the first head 1-1 located at the lower part of the central line 5, and closing the nozzles 2 of the second head 1-2 located at the upper part of the central line 5, it is possible to prevent the print medium from being repeatedly ejected, resulting in an excessive amount of ink being ejected onto the print medium, resulting in an image printed with color enrichment and significant delamination compared to other areas of the image.

The middle lines 5 are the lower spray edge of the first spray head 1-1 and the upper spray edge of the second spray head 1-2, respectively.

At present, in the working process of an industrial ink-jet printer, a printer nozzle sprays ink drops to form pictures and texts on a printing medium. During the process of trolley movement during printing, a 'wind wall' is easily formed at the splicing and overlapping part of the first spray head 1-1 and the second spray head 1-2. Since the air flow velocity in the "wind wall" is higher than the air flow velocity in the surroundings, and therefore the air pressure is lower, the ink droplets ejected by the nozzles 2 of the first head 1-1 located between the center line 5 and the first straight line 6 above the center line 5 and the ink droplets ejected by the nozzles 2 of the second head 1-2 located between the center line 5 and the second straight line 7 below the center line 5 are easily "sucked" into the "wind wall" and overlap each other, resulting in the overlap having a greater ink volume concentration than the surroundings, and visually forming a dark color joint channel, which we call a "black channel".

Fig. 2 illustrates ink dots printed on a printing medium by using the tiled inkjet head shown in fig. 1. The area within the dashed rectangular box 8 in fig. 2 is the area formed by the jets from the nozzles in the first head 1-1 in fig. 1 between the centre line 5 and a first straight line 6 above the centre line 5 and from the nozzles in the second head 1-2 between the centre line 5 and a second straight line 7 below the centre line 5.

As shown in fig. 2, in the area within the dotted rectangular frame 8, dots overlapping each other appear after two lines of ink drops fall due to the influence of external factors, visually presenting a long and thin "black track" darker in color than the surroundings.

The invention provides a method, a device, equipment and a medium for controlling nozzles in a multi-nozzle splicing overlapping area, which can prevent the color thickening of images in an area below the nozzle splicing overlapping area on a printing medium to a certain extent and obviously layer the images in other areas.

An embodiment of the present invention provides a method for controlling nozzles in a multi-nozzle splicing overlap region, as shown in fig. 3, the method includes the following steps S1 to S2.

Step S1: and acquiring the position of the nozzle to be closed in the splicing and overlapping area of the first spray head and the second spray head.

The splice overlap region includes: a nozzle region on the first head that overlaps with the second head printing, or a nozzle region on the second head that overlaps with the first head printing.

The nozzles to be closed are the nozzles to be closed in the splicing overlap region. By closing part of the nozzles in the splicing and overlapping area, the problems that the color of the image printed by the splicing and overlapping area is thickened, and the image is obviously layered with other partial images and the like can be prevented.

Before closing the nozzles to be closed in the splice overlap region, it is necessary to acquire the positions of the nozzles to be closed, and then close the nozzles to be closed according to the positions of the nozzles to be closed.

In one embodiment, as shown in fig. 4, step S1, acquiring the position of the nozzle to be closed in the splicing overlap region, includes step S11: acquiring a splicing overlapping area of a first spray head and a second spray head on the first spray head and/or the second spray head; step S12: and acquiring the position of the nozzle to be closed in the splicing overlapping area according to the splicing overlapping area.

The splice overlap region includes: and the first nozzle is connected with a second nozzle spliced with the first nozzle to print an overlapped nozzle area, and the second nozzle is connected with a first nozzle spliced with the second nozzle to print an overlapped nozzle area.

Through obtaining the concatenation overlap area, can close the partial nozzle that is located concatenation overlap area on first shower nozzle and/or the second shower nozzle to prevent that the image colour enrichment from appearing in the region that is located first shower nozzle and second shower nozzle concatenation overlap area below on print media, the printed image of waiting to print the poor scheduling problem of effect.

In one embodiment, in step S1, acquiring the position of the nozzle to be closed located in the splice overlap region includes: and acquiring the positions of nozzles which are positioned in the splicing overlapping area and have a vertical distance with the jetting edge smaller than or equal to a set distance in a nozzle area which is positioned on one side of the jetting edge during printing, and recording the acquired positions of the nozzles as the positions of the nozzles to be closed, wherein the jetting edge is a boundary line between the nozzle area which jets the ink and the nozzle area which does not jet the ink in the nozzle head during printing.

In one embodiment, the jetting edge comprises a midline of the splice overlap region.

In one embodiment, the set distance is greater than 0 and less than 0.5mm.

During printing, the nozzles on one side of the jetting edge do not eject ink, and the nozzles on the other side eject ink. The ejection nozzle area on the ejection edge side at the time of printing includes: the area on the side of the jetting edge where the nozzle jetting the ink is located at the time of printing.

By acquiring the positions of part of nozzles in the jetting area near the jetting edge and closing the part of nozzles in the printing process, black channels can be prevented from being generated by printing at the splicing position of the nozzles, and the image printing effect is further improved.

The spray head comprises a first spray head and a second spray head.

In one embodiment, the jetting edge is parallel to the paper feed direction. The paper feeding direction includes a relative movement direction of the head and the printing medium.

As shown in fig. 1, the jetting edge is the centerline 5. The nozzles 23 of the first head 1-1 located below the center line 5 do not eject ink, and the nozzles 2 located above the center line 5 eject ink, so the center line 5 is the lower ejection edge of the first head 1-1. The center line 5 divides each nozzle 2 of the first head 1-1 into a portion which does not eject ink and a portion which ejects ink and is located at a lower portion of the first head 1-1 and an upper portion of the first head 1-1. By dividing the nozzle into two parts of jetting ink and not jetting ink by the jetting edge positioned in the splicing and overlapping area, the splicing and overlapping area can be prevented from jetting two excessive amounts of ink on the printing medium, and the printing effect is prevented from being influenced.

In one embodiment, as shown in fig. 5, in the nozzle region for jetting ink located on one side of the jetting edge during printing, before acquiring the position of the nozzle located in the splice overlapping region and having a vertical distance from the jetting edge less than or equal to a set distance, the method further includes; step S13: acquiring a preset area in the splicing overlapping area in an injection nozzle area on one side of the injection edge, wherein the area is an area between the injection edge and a virtual line, and the vertical distance between the injection edge and the virtual line is smaller than or equal to the set distance; step S14: and acquiring the position of the nozzle to be closed in the preset area.

By acquiring the vertical distance from the jetting edge to the jetting edge in the splicing overlapping area, which is less than or equal to the set distance, and the area between the virtual lines of the set distance, the area where the nozzle generating the black channel at the splicing position of the nozzle is located can be acquired, and by closing part of the nozzles in the area, the generation of the black channel can be prevented. The black lanes are shown in fig. 2 as dashed boxes 8.

As shown in fig. 6, in step S14, acquiring the position of the nozzle to be closed in the preset area includes: step S141: acquiring the number k of the nozzles positioned between two adjacent nozzles to be closed; step S142: and acquiring the positions of the nozzles to be closed in the preset area according to the number k.

Acquiring the positions of the nozzles to be closed in the preset area according to the number k, wherein the acquiring comprises the following steps: in the preset area, for an acquired nozzle to be closed, acquiring the position of each nozzle with a distance of k nozzles from the nozzle, and recording the acquired position of the nozzle as the position of the nozzle to be closed.

By acquiring the number k of the nozzles between the two nozzles to be closed, the closed nozzles can be uniformly distributed in a preset area in the printing process, the situation that the number of the nozzles closed in a part of nozzle areas is too large, the color of an image printed by the part of nozzle areas becomes light can be prevented, the situation that the number of the nozzles closed in the part of nozzle areas is too small, the color of the image printed by the part of nozzle areas is thick can be prevented, and the printing effect of the image is improved.

In one embodiment, in step S1, positions of nozzles located between a center line of the splicing overlap region and an edge of the head in the splicing overlap region are acquired, and the acquired positions of the nozzles are recorded as positions of the nozzles to be closed, the center line being parallel to the paper feeding direction.

The paper feeding direction is the relative moving direction of the spray head and the printing medium.

In one embodiment, acquiring a position of a nozzle located between a center line of the splice overlap area and a head edge in the splice overlap area, the center line being parallel to the paper feeding direction, and recording the acquired position of the nozzle as a position of the nozzle to be closed, includes: acquiring the position of a nozzle positioned in the splicing overlapping area from the center line of the splicing overlapping area to the edge of the spray head, and recording the acquired position of each nozzle as the position of the nozzle to be closed, wherein the center line is parallel to the paper feeding direction.

By acquiring the positions of the nozzles from the ejection edge to the head edge in the splicing and overlapping area, the nozzles from the ejection edge to the head edge in the splicing and overlapping area can be closed, so that the color of the image printed by the splicing and overlapping area is prevented from being thickened.

In one embodiment, before acquiring the position of the nozzle to be closed in the splicing overlap region in step S1, the method further includes: and acquiring the spraying edge of the spray head in the splicing overlapping area.

Step S2: and closing the corresponding nozzle in printing according to the position of the nozzle to be closed.

Corresponding nozzles are closed in printing according to the positions of the nozzles to be closed, repeated printing on a printing area on a printing medium can be prevented, black channels can be prevented from being generated at the boundary position of the two nozzles, and therefore the printing effect of images is improved.

In one embodiment, in step S2, closing the corresponding nozzle in printing according to the position of the nozzle to be closed includes: and controlling the corresponding voltage in the driving waveform corresponding to the nozzle to be closed not to be output during printing according to the position of the nozzle to be closed.

In the printing process, each nozzle in the spray head sprays ink under the driving of a voltage driving waveform, and the nozzle to be closed can be closed by controlling the corresponding voltage in the driving waveform corresponding to the nozzle to be closed not to be output during printing, so that the nozzle to be closed is ensured not to spray ink in the printing process.

In one embodiment, as shown in fig. 7, in step S2, driving the nozzle to be closed without using a voltage driving waveform that drives the nozzle to eject ink during printing according to the position of the nozzle to be closed, thereby closing the nozzle to be closed, includes: step S21: acquiring printing data for controlling the nozzle to be closed in printing according to the position of the nozzle to be closed; step S22: and processing the print data so that the ink output amount when printing is performed according to the processed print data is smaller than the ink output amount when printing is performed according to the print data before processing.

The non-discharge data is data for controlling the nozzles not to eject ink. The printing data corresponding to the nozzle to be closed is changed into the non-ink-output data, so that the nozzle to be closed can be ensured not to emit ink in the printing process.

The print data includes ink discharge data and non-ink discharge data. The ink discharge data is data for controlling the nozzles to eject ink at the time of printing. The non-discharge data is data for controlling the nozzles not to eject ink during printing.

The print data is image dot matrix data. The image dot matrix data is composed of ink discharge data and non-ink discharge data.

In step S22, processing the print data so that an ink discharge amount when printing is performed based on the processed print data is smaller than an ink discharge amount when printing is performed based on the pre-processed print data includes: and changing part of ink output data in the image dot matrix data into non-ink output data.

Changing a part of the ink discharge data in the image dot matrix data into non-ink discharge data includes: acquiring first emergence lattice data with data arrangement different from the image lattice data; and performing logical operation on the first feathering dot matrix data and the image dot matrix data so as to change partial non-ink-discharge data in the image dot matrix data into ink-discharge data.

A logical operation comprising: an exclusive OR operation, an AND operation, a NOT operation, an XOR operation, etc.

In one embodiment, the image dot matrix data includes data sets for controlling the nozzles to eject the ink in the first set amount, the second set amount, and the third set amount, respectively.

Processing the print data so that an ink discharge amount when printing is performed according to the processed print data is smaller than an ink discharge amount when printing is performed according to the print data before processing, including: acquiring second emergence lattice data including only a data set for controlling ejection of the first set amount of ink; acquiring third eclosion dot matrix data which only comprises a data set for controlling the jetting of the second set amount of ink; the fourth eclosion dot matrix data includes only a data set for controlling ejection of a third set amount of ink; and performing logical operation by using the first feathering dot matrix data, the second feathering dot matrix data, the third feathering dot matrix data and the image dot matrix data, so that the amount of ink ejected according to the image dot matrix data before processing is smaller than the amount of ink ejected according to the image dot matrix data after processing.

In one embodiment, processing the print data so that an ink discharge amount when printing is performed based on the processed print data is smaller than an ink discharge amount when printing is performed based on the pre-processed print data includes: and processing the image dot matrix data, so that the number of nozzles for ejecting a first set amount when printing is carried out according to the processed image dot matrix data is smaller than a first preset value, the number of nozzles for ejecting a second set amount when printing is carried out according to the processed image dot matrix data is smaller than a second preset value, and the number of nozzles for ejecting a third set amount when printing is carried out according to the processed image dot matrix data is smaller than a third preset value, wherein the first preset value is smaller than the second preset value, and the second preset value is smaller than the third preset value.

In one embodiment, obtaining first feathering dot matrix data having a different data arrangement than the image dot matrix data comprises: acquiring image dot matrix data; and processing part of data in the image dot matrix data to obtain first feathering dot matrix data with data arrangement different from that of the image dot matrix data.

The printing data is data for controlling the nozzles to eject ink during printing. The print data includes ink discharge data for controlling the nozzles to discharge ink and non-ink discharge data for controlling the nozzles not to discharge ink. The nozzle to be closed can be closed by modifying the printing data for controlling the nozzle to be closed into the non-ink-discharge data for controlling the nozzle not to eject ink, so that the nozzle to be closed does not eject ink in the printing process.

In one embodiment, in step S2, driving the nozzle to be closed without using a voltage driving waveform that drives the nozzle to eject ink during printing, according to the position of the nozzle to be closed, thereby closing the nozzle to be closed, includes: according to the position of the nozzle to be closed, the nozzle to be closed is not controlled by using printing data for controlling the nozzle to be closed in the printing process, a voltage driving waveform for driving the nozzle cannot be generated according to the data, and the aims of driving the nozzle to be closed and closing the nozzle to be closed without using the voltage driving waveform for driving the nozzle to jet ink in the printing process can be achieved.

During printing, the nozzles eject ink under the control of print data, and the nozzles to be closed can be closed by controlling the nozzles to be closed without using the print data that controls the nozzles to be closed.

In one embodiment, controlling the nozzles to be closed during printing without using print data that controls the nozzles to be closed comprises: acquiring a storage position of printing data for controlling the nozzle to be closed in an internal buffer according to the position of the nozzle to be closed; the print data is not acquired from the storage location during printing, thereby closing the nozzle to be closed.

The internal buffer is for storing print data. The print data for controlling each nozzle is distributed in an array in the internal buffer, forming an image data array. The spray head control module comprises an FPGA and a digital-to-analog converter. And the FPGA is used for acquiring the printing data from different storage positions in the internal buffer. The digital-to-analog converter is used for converting the acquired printing data into voltage driving waveforms. The voltage drive waveform drives the nozzle to perform an ink ejection operation.

The storage position of the printing data of the nozzle to be closed in the internal buffer is controlled, the nozzle control module does not acquire the printing data from the storage position in the printing process, a voltage driving waveform for driving the nozzle to be closed cannot be generated in the printing process, and the nozzle to be closed cannot jet ink under the driving of the printing driving waveform, so that the aim of closing the nozzle to be closed can be achieved.

An embodiment of the present invention provides a nozzle control apparatus for a multi-nozzle splicing overlap region, as shown in fig. 8, the apparatus includes a first obtaining module 01 and a closing module 02.

And the first acquisition module 01 is used for acquiring the positions of the nozzles to be closed in the splicing and overlapping area of the first spray head and the second spray head.

The nozzles to be closed are the nozzles to be closed in the splicing overlap region. By closing part of the nozzles positioned in the splicing and overlapping area, the problems that the color of the image printed by the splicing and overlapping area is thickened, and the image is obviously layered with other partial images and the like can be prevented.

Before closing the nozzles to be closed in the splicing overlap region, the positions of the nozzles to be closed need to be acquired by the first acquisition module 01, and then the nozzles to be closed need to be closed according to the positions of the nozzles to be closed.

In one embodiment, as shown in fig. 9, the first obtaining module 01 includes a first obtaining submodule 011 and a second obtaining submodule 012.

The first obtaining submodule 011 is used for obtaining a splicing overlapping area of a first spray head and a second spray head on the first spray head and/or the second spray head; the second obtaining submodule 012 is configured to obtain, according to the splicing overlap area, a position of a nozzle to be closed in the splicing overlap area.

The splicing overlapping area is acquired by the first acquisition sub-module 011, and partial nozzles in the splicing overlapping area on the first sprayer and/or the second sprayer can be closed, so that the problems that image color enrichment occurs in an area below the splicing overlapping area of the first sprayer and the second sprayer on a printing medium, the effect of a printed image to be printed is poor, and the like are solved.

In one embodiment, the first obtaining module 01 is further configured to, in a nozzle region that ejects ink and is located on one side of an ejection edge during printing, obtain positions of nozzles that are located in the splicing overlap region and have a vertical distance from the ejection edge that is a boundary between a nozzle region that ejects ink and a nozzle region that does not eject ink in the inkjet head during printing, and record the obtained positions of the nozzles as the positions of the nozzles to be closed.

The virtual line is a line assumed to define an area where the nozzle to be closed is located, and the line does not exist on the head.

In one embodiment, the set distance is greater than 0 and less than 0.5mm.

The first acquisition module 01 can prevent a black channel from being generated by printing at the joint of the spray heads by acquiring the positions of part of nozzles in the spray area near the spray edge and closing the part of nozzles in the printing process, so that the image printing effect is further improved.

The spray head comprises a first spray head and a second spray head.

In one embodiment, the jetting edge is parallel to the paper feed direction. The paper feeding direction includes a relative movement direction of the nozzle and the printing medium.

As shown in fig. 1, the jetting edge is the centerline 5. The nozzles 23 of the first head 1-1 located below the center line 5 do not eject ink, and the nozzles 2 located above the center line 5 eject ink, so the center line 5 is the lower ejection edge of the first head 1-1. The center line 5 divides each nozzle 2 of the first head 1-1 into a portion which does not eject ink and a portion which ejects ink and is located at a lower portion of the first head 1-1 and an upper portion of the first head 1-1. By dividing the nozzle into two parts of jetting ink and not jetting ink by the jetting edge positioned in the splicing overlapping area, the splicing overlapping area can be prevented from jetting two excessive amounts of ink on the printing medium to influence the printing effect.

In one embodiment, as shown in fig. 10, the first obtaining module 01 includes: a third fetch submodule 013 and a fourth fetch submodule 014.

A third obtaining submodule 013, configured to obtain, in a jetting nozzle region on the jetting edge side, a preset region in the splicing overlap region, where the region is a region from the jetting edge to a virtual line whose perpendicular distance from the jetting edge is equal to or less than the set distance; and a fourth acquiring submodule 014 for acquiring a position of the nozzle to be closed located in the preset area.

The third obtaining sub-module 013 can obtain a region where a nozzle that generates a black road at the head joint is located by obtaining a region between virtual lines in which a perpendicular distance from the ejection edge to the ejection edge is equal to or less than the set distance in the joint overlap region, and can prevent generation of the black road by closing a part of the nozzles in the region. The black lanes are shown in fig. 2 as dashed boxes 8.

As shown in fig. 11, the fourth obtaining submodule 014 includes: a first acquisition unit 0141 and a second acquisition unit 0142.

A first acquiring unit 0141 configured to acquire the number k of the nozzles located between two adjacent nozzles to be closed; a second obtaining unit 0142, configured to obtain the positions of the nozzles to be closed located in the preset area according to the number k.

The second obtaining unit 0142 obtains the positions of the nozzles to be closed located in the preset area according to the number k, including: the second acquiring unit 0142 acquires, in the preset area, the position of each of the nozzles spaced from the acquired nozzle to be closed by a numerical value k, and records the acquired position of the nozzle as the position of the nozzle to be closed.

By acquiring the number k of the nozzles between the two nozzles to be closed by using the first acquiring unit 0141, the closed nozzles can be uniformly distributed in a preset area in the printing process, so that the situation that the color of an image printed by a part of nozzle areas becomes light due to the fact that the number of the closed nozzles of the part of nozzle areas is too large can be prevented, the situation that the color of the image printed by the part of nozzle areas is dark due to the fact that the number of the closed nozzles of the part of nozzle areas is too small can be prevented, and the printing effect of the image is improved.

In an embodiment, the first obtaining module 01 is further configured to obtain positions of nozzles located in the splicing overlap area from a center line of the splicing overlap area to an edge of the head, and record the obtained positions of the nozzles as the positions of the nozzles to be closed, where the center line is parallel to the paper feeding direction.

In one embodiment, the first obtaining module 01 is further configured to obtain positions of nozzles located in the splicing overlap area from a center line of the splicing overlap area to an edge of the head, and record the obtained positions of the nozzles as positions of the nozzles to be closed, where the center line is parallel to the paper feeding direction.

The first acquiring module 01 can close each nozzle located between the ejection edge and the head edge in the splicing overlap region by acquiring the position of each nozzle located between the ejection edge and the head edge in the splicing overlap region, thereby preventing the color of the image printed in the splicing overlap region from being thickened.

In one embodiment, as shown in fig. 12, the apparatus further comprises a second acquisition module 001. The second obtaining module 001 is connected to the first obtaining module 01.

And the second acquiring module 001 is used for acquiring the spraying edge of the sprayer in the splicing overlapping area before the position of the nozzle to be closed in the splicing overlapping area.

And the closing module 02 is used for closing the corresponding nozzle in printing according to the position of the nozzle to be closed.

Corresponding nozzles are closed in printing according to the positions of the nozzles to be closed by the closing module 02, repeated printing on a printing area on a printing medium can be prevented, and black channels can be prevented from being generated at the boundary positions of the two nozzles, so that the printing effect of images is improved.

In one embodiment, the closing module 02 is further configured to control the corresponding voltage not to be output in the driving waveform corresponding to the nozzle to be closed during printing according to the position of the nozzle to be closed.

In the printing process, each nozzle in the nozzle ejects ink under the driving of a voltage driving waveform, and the closing module 02 drives the nozzle to be closed by the voltage driving waveform which does not drive the nozzle to eject ink in the printing process, so that the nozzle to be closed can be closed, and the nozzle to be closed is ensured not to eject ink in the printing process.

In one embodiment, as shown in fig. 13, the shutdown module 02 includes: a seventh acquisition sub-module 021 and a modification sub-module 022.

The seventh obtaining sub-module 021, configured to obtain, according to the position of the nozzle to be closed, print data that controls the nozzle to be closed during printing; a modification sub-module 022 configured to process the print data such that an ink discharge amount when printing is performed according to the processed print data is smaller than an ink discharge amount when printing is performed according to the pre-processed print data.

In an embodiment, the closing module 02 is further configured to control the nozzle to be closed without using print data for controlling the nozzle to be closed during a printing process according to the position of the nozzle to be closed, and a voltage driving waveform for driving the nozzle cannot be generated according to the data, so that the nozzle to be closed is driven without using the voltage driving waveform for driving the nozzle to eject ink during the printing process, and the nozzle to be closed is closed.

During printing, the nozzles eject ink under the control of print data, and the closing module 02 can close the nozzles to be closed by controlling the nozzles to be closed without using the print data that controls the nozzles to be closed.

In an embodiment, the closing module 02 is further configured to obtain, according to the position of the nozzle to be closed, a storage location of print data for controlling the nozzle to be closed in an internal buffer; the print data is not acquired from the storage location during printing, thereby closing the nozzle to be closed.

The closing module 02 controls the storage position of the print data of the nozzle to be closed in the internal buffer by obtaining, and the nozzle control module does not obtain the print data from the storage position in the printing process, a voltage driving waveform for driving the nozzle to be closed is not generated in the printing process, and the nozzle to be closed does not eject ink under the driving of the printing driving waveform, so that the aim of closing the nozzle to be closed can be achieved.

Referring to fig. 14, the printing method according to the above embodiment of the present invention further provides a nozzle control apparatus for a multi-nozzle splicing overlap region, the apparatus mainly includes:

at least one processor 401; and the number of the first and second groups,

a memory 402 communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory 402 stores instructions executable by the at least one processor to be executed by the at least one processor 401 to enable the at least one processor 401 to perform the method of the above-described embodiments of the present invention. For a detailed description of the device, reference is made to the above embodiments, which are not repeated herein.

Specifically, the processor 401 may include a Central Processing Unit (CPU), or a specific integrated Circuit (asic), or one or more integrated circuits that may be configured to implement an embodiment of the present invention.

Memory 402 may include mass storage for data or instructions. By way of example, and not limitation, memory 402 may include a Hard disk Drive (numerical Hard Drive, numerical HDD), a floppy disk Drive, flash memory, an optical disk, a magneto-optical disk, magnetic tape, or a universal serial bus (ULB) Drive or a combination of two or more of these. Memory 402 may include removable or non-removable (or fixed) media, where appropriate. The memory 402 may be internal or external to the data processing apparatus, where appropriate. In a particular embodiment, the memory 402 is a non-volatile solid-state memory. In a particular embodiment, the memory 402 includes a read-only memory (RO value N). Where appropriate, the RO value N may be a mask-programmed RO value N, a programmable RO value N (PRO value N), an erasable PRO value N (EPRO value N), an electrically erasable PRO value N (EEPRO value N), an electrically rewritable RO value N (EARO value N) or a flash memory or a combination of two or more of these.

The processor 401 reads and executes the computer program instructions stored in the memory 402 to implement any one of the multi-nozzle splicing overlap area nozzle control methods in the above embodiments.

In one example, the multi-jet splice overlap region nozzle control device can also include a communication interface 403 and a bus 410. As shown in fig. 14, the processor 401, the memory 402, and the communication interface 403 are connected by a bus 410 to complete communication therebetween.

The communication interface 403 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present invention.

Bus 410 includes hardware, software, or both to couple components including a multi-jet splice overlap region nozzle control device to each other. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an enhanced industry standard architecture (EILA) bus, a front side bus (FLB), a hypertransport (value HT) interconnect, an industry standard architecture (ILA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a micro channel architecture (value NCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-express (PCI-X) bus, a serial advanced technology attachment (LATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus, or a combination of two or more of these. Bus 410 may include one or more buses, where appropriate. Although specific buses have been described and shown in the embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.

In addition, in combination with the method for controlling nozzles in the multi-nozzle splicing overlap region in the foregoing embodiment, an embodiment of the present invention may provide a computer-readable storage medium to implement the method. The computer readable storage medium having stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any one of the above-described embodiments of the method for controlling nozzles in a multi-nozzle stitching overlap region.

It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention. These are all intended to be covered by the scope of protection of the present invention.

Claims

1. A method for controlling nozzles in a multi-nozzle splicing overlapping area is characterized by comprising the following steps:

acquiring the position of a nozzle to be closed in a splicing and overlapping area of a first spray head and a second spray head, wherein the method comprises the following steps: acquiring the positions of nozzles which are positioned in the splicing overlapping area and have a vertical distance with the jetting edge smaller than or equal to a set distance in a nozzle area which is positioned on one side of the jetting edge and jets the ink, and recording the acquired positions of the nozzles as the positions of the nozzles to be closed, wherein the jetting edge is a boundary line between the nozzle area which jets the ink and the nozzle area which does not jet the ink in the spray head;

2. The method of claim 1, wherein the obtaining the position of the nozzle to be closed in the splicing overlap region of the first spray head and the second spray head comprises:

acquiring a splicing overlapping area of a first spray head and a second spray head on the first spray head and/or the second spray head;

and acquiring the position of the nozzle to be closed in the splicing overlapping area according to the splicing overlapping area.

3. The method according to claim 1, wherein the acquiring, in a nozzle area for ejecting ink located on a side of an ejection edge at the time of printing, a position of a nozzle located in the splice overlap area at a vertical distance from the ejection edge which is equal to or less than a set distance, further comprises;

acquiring a preset area in the splicing overlapping area in a spray nozzle area on one side of the spray edge, wherein the preset area is an area between the spray edge and a virtual line of which the vertical distance from the spray edge to the spray edge is smaller than or equal to the set distance;

and acquiring the position of the nozzle to be closed in the preset area.

4. The method of claim 1, wherein the obtaining the position of the nozzle to be closed in the splicing overlap region of the first spray head and the second spray head comprises: acquiring the position of a nozzle positioned between the center line of the splicing overlapping area and the edge of the spray head in the splicing overlapping area, and recording the acquired position of the nozzle as the position of the nozzle to be closed, wherein the center line is parallel to the paper feeding direction.

5. The method according to claim 1, wherein closing the respective nozzle in printing according to the position of the nozzle to be closed comprises:

and controlling the corresponding voltage in the driving waveform corresponding to the nozzle to be closed not to be output during printing according to the position of the nozzle to be closed.

6. The method according to claim 1, wherein the controlling, according to the position of the nozzle to be closed, the respective voltages in the driving waveforms corresponding to the nozzle to be closed not to be output at the time of printing comprises:

acquiring printing data for controlling the nozzle to be closed in printing according to the position of the nozzle to be closed;

and processing the print data so that the ink output amount when printing is performed according to the processed print data is smaller than the ink output amount when printing is performed according to the print data before processing.

7. A multi-nozzle split overlap area nozzle control apparatus, the apparatus comprising:

the first acquisition module is used for acquiring the positions of the nozzles to be closed in the splicing and overlapping area of the first spray head and the second spray head, and comprises: acquiring the positions of nozzles which are positioned in the splicing overlapping area and have the vertical distance with the jetting edge smaller than or equal to a set distance in a nozzle area which is positioned on one side of the jetting edge and jets the ink, and recording the acquired positions of the nozzles as the positions of the nozzles to be closed, wherein the jetting edge is a boundary line between the nozzle area which jets the ink and the nozzle area which does not jet the ink in the sprayer;

8. A multi-jet splicing overlap area nozzle control apparatus, the apparatus comprising:

at least one processor; and

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-6.

9. A computer storage medium having computer program instructions stored thereon, wherein,

the computer program instructions, when executed by a processor, implement the method of any one of claims 1-6.