CN115447278A - Printing method, device and equipment for improving image uniformity and storage medium - Google Patents

Printing method, device and equipment for improving image uniformity and storage medium Download PDF

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Publication number
CN115447278A
CN115447278A CN202110637323.1A CN202110637323A CN115447278A CN 115447278 A CN115447278 A CN 115447278A CN 202110637323 A CN202110637323 A CN 202110637323A CN 115447278 A CN115447278 A CN 115447278A
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Prior art keywords
ink
printing
dot matrix
nozzle
matrix data
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Granted
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CN202110637323.1A
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Chinese (zh)
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CN115447278B (en
Inventor
何伟
李龙良
黄中琨
陈艳
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Shenzhen Hansen Software Co ltd
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Shenzhen Hosonsoft Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

The invention belongs to the technical field of printing, and provides a printing method, a printing device, printing equipment and a storage medium for improving image uniformity. The printing method for improving the image uniformity comprises the following steps of S1: acquiring an ink amount required by printing an image to be printed by adopting original printing precision as a first printing ink amount; s2: acquiring the ink amount required by printing the image to be printed by adopting the nozzle precision as a second printing ink amount; s3: determining dot matrix data corresponding to each nozzle according to the number of the nozzles for printing the image to be printed and an ink quantity difference value between the first printing ink quantity and the second printing ink quantity, so that the sum of the printing ink quantities of the nozzles is equal to the first printing ink quantity; s4: and controlling a first sprayer to print by adopting sprayer precision according to the dot matrix data, and controlling a second sprayer to print according to the dot matrix position printed by the first sprayer. The invention also comprises a device, equipment and a storage medium for executing the method. The invention can improve the uniformity of the printed image.

Description

Printing method, device and equipment for improving image uniformity and storage medium
Technical Field
The present invention relates to the field of inkjet printing technologies, and in particular, to a printing method, apparatus, device, and storage medium for improving image uniformity.
Background
The ink jet printing technology refers to a technology of ejecting ink droplets onto a printing medium through nozzles on a nozzle to obtain images or characters, and mainly includes two modes of reciprocating scanning printing and multi-nozzle side-by-side scanning printing. The reciprocating scanning printing is also called multi-pass scanning printing, and the multi-pass scanning printing means that each unit of an image to be printed can be printed only by performing interpolation for multiple times. Although the printing mode can realize printing with precision higher than that of the spray head, when each area is printed for multiple times, the printing efficiency is low, for example, 4pass scanning printing is adopted, and each unit consists of 4 pixel points in the 4pass scanning printing mode, and one pixel point is printed in each scanning.
Along with the improvement of the requirements on printing precision and printing speed, in order to meet the requirements on printing precision and printing speed, a plurality of spray heads are spliced for printing at present, but because the precision of the spray heads is limited, the precision required by customers can not be met, high precision can be realized only by adopting a method of inserting point paper feeding, when the inserting point paper feeding can generate small hole intervals, but because of the conditions of machine paper feeding errors, spray head installation errors, machine shaking errors and the like, the final printed image has the problems of non-uniformity, poor effect and the like.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a printing method, apparatus, device and storage medium for improving image uniformity, so as to solve the technical problem in the prior art that a printed image is not uniform due to machine errors.
The technical scheme adopted by the invention is as follows:
in a first aspect, the present invention provides a nozzle for printing comprising at least one first nozzle and at least one second nozzle, the method comprising:
s1: acquiring an ink amount required by printing an image to be printed with original printing precision as a first printing ink amount;
s2: acquiring an ink amount required by printing an image to be printed by adopting the nozzle precision as a second printing ink amount;
s3: determining dot matrix data corresponding to each nozzle according to the number of the nozzles for printing the image to be printed and an ink quantity difference value between the first printing ink quantity and the second printing ink quantity, so that the sum of the printing ink quantities of the nozzles is equal to the first printing ink quantity;
s4: and controlling the first sprayer to print by adopting the sprayer precision according to the dot matrix data, and controlling the second sprayer to print according to the dot matrix position printed by the first sprayer.
Preferably, the ratio of S1: acquiring an ink amount required by printing an image to be printed by adopting original printing precision as a first printing ink amount, and comprising the following steps;
s11: acquiring the volume of each type of ink drop of the printing equipment;
s12: acquiring the number of ink drops of each type, which are printed by adopting original printing precision, of an image to be printed;
s13: and calculating to obtain a first printing ink quantity according to the volume of each type of ink drop and the quantity of each type of ink drop.
Preferably, S2: acquiring an ink amount required by printing an image to be printed by adopting the nozzle precision as a second printing ink amount, and comprising the following steps;
s21: acquiring the volume of each type of ink drop of the printing equipment;
s22: acquiring the number of ink drops of each type printed by adopting the nozzle precision;
s23: and calculating to obtain a second printing ink quantity according to the volume of each type of ink drop and the quantity of each type of ink drop.
Preferably, the S3: determining dot matrix data corresponding to each nozzle according to the number N of the nozzles used for printing the image to be printed and the ink quantity difference Vd of the first printing ink quantity and the second printing ink quantity, and the method comprises the following steps:
s31: acquiring an ink amount difference Vd between a second printing ink amount and a first printing ink amount;
s32: acquiring dot matrix data printed by adopting the nozzle precision as dot matrix data of a first nozzle;
s33: determining a reference ink amount Vr according to the dot matrix data of the first nozzle;
s34: acquiring the number N of spray heads for printing an image to be printed;
s35: comparing the Vd/Vr with the N-N1;
s36: determining dot matrix data of the second sprayer according to the comparison result;
wherein n1 is the number of the first nozzles, and n1 is a positive integer greater than or equal to 1.
Preferably, the ink droplets ejected by the printing device include a first ink droplet, a second ink droplet and a third ink droplet, wherein the volume of the first ink droplet is larger than that of the second ink droplet, and the volume of the second ink droplet is larger than that of the third ink droplet, and S33: determining a reference ink amount Vr according to dot matrix data of the first head, including the steps of:
s331: determining the number N1 of first ink drops and the number N2 of second ink drops required by the first nozzle for printing according to the dot matrix data of the first nozzle;
s332: acquiring the volume V1 of the first ink drop and the volume V2 of the second ink drop;
s333: a reference ink amount Vr is calculated, where Vr = V1 × N1+ V2 × N2.
Preferably, the step S36: determining the dot matrix data of the second nozzle according to the comparison result, comprising the following steps:
s361: if (Vd/Vr) > (N-N1), adjusting the third ink droplet discharging data in the dot matrix data of the first spray head into ink non-discharging data to obtain first middle dot matrix data of the second spray head;
s362: selecting at least one spray head from the second spray heads as an adjusting spray head;
s363: adjusting at least one part of the first intermediate dot matrix data which adopts the second ink drop to adopt the first ink drop to discharge ink to be used as the dot matrix data of the adjusting nozzle;
s364: and if (N-N1) > 1, taking the first intermediate dot matrix data as the dot matrix data of the rest of the second nozzles.
Preferably, the step S36: and determining the dot matrix data of the second nozzle according to the comparison result, comprising the following steps of:
s3601: if (Vd/Vr) < (N-N1), adjusting the third ink droplet discharging data in the dot matrix data of the first spray head to be non-discharging data to obtain first middle dot matrix data of the second spray head;
s3602: selecting at least one spray head from the second spray heads as an adjusting spray head;
s3603: adjusting at least one part of the intermediate dot matrix data by adopting the first ink drop ink discharge data into the second ink drop ink discharge data to be used as the dot matrix data for adjusting the spray head;
s3604: if (N-N1) > 1, taking the first intermediate dot matrix data as the dot matrix data of the rest of the second nozzles;
preferably, the ink droplets ejected by the printing device include a first ink droplet, a second ink droplet and a third ink droplet, wherein the volume of the first ink droplet is larger than that of the second ink droplet, and the volume of the second ink droplet is larger than that of the third ink droplet, and at S33: determining an ink amount required for printing the dot matrix data of the first nozzle in the reference ink amount Vr as a reference ink amount Vr according to the dot matrix data of the first nozzle;
and S36: determining the dot matrix data of the second nozzle according to the comparison result, comprising the following steps:
s3611: if (Vd/Vr) > (N-N1), selecting at least one spray head from the second spray heads as an adjusting spray head;
s3612: adjusting at least one part of the dot matrix data of the first nozzle, which adopts ink drop discharging with smaller volume, into ink drop discharging with larger volume, and then taking the adjusted data as the dot matrix data of the adjusted nozzle;
s3613: and if the (N-N1) > 1, taking the dot matrix data of the first spray head as the dot matrix data of the rest spray heads in the second spray head.
In a second aspect, the present invention also provides a printing apparatus for improving image uniformity, the apparatus comprising:
the printing device comprises a first printing ink quantity acquisition module, a second printing ink quantity acquisition module and a printing module, wherein the first printing ink quantity acquisition module is used for acquiring an ink quantity required by printing of an image to be printed with original printing precision as a first printing ink quantity;
the second printing ink quantity acquisition module is used for acquiring the ink quantity required by printing the image to be printed by adopting the nozzle precision as a second printing ink quantity;
the nozzle dot matrix data determining module is used for determining dot matrix data corresponding to each nozzle according to the number N of the nozzles used for printing the image to be printed and an ink quantity difference value Vd of the first printing ink quantity and the second printing ink quantity, so that the sum of the printing ink quantities of the nozzles is equal to the first printing ink quantity;
and the control module is used for controlling the first spray head to print by adopting spray head precision according to the dot matrix data and controlling the second spray head to spray dot matrix positions printed by the first spray head to print.
In a third aspect, the present invention also provides a printing apparatus for improving image uniformity, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of the first aspect.
The present invention also provides in a fourth aspect a storage medium having stored thereon computer program instructions which, when executed by a processor, implement the method of the first aspect.
Has the advantages that: the printing method, the printing device, the printing equipment and the storage medium for improving the image uniformity divide the spray heads into a first spray head for printing according to the precision of the spray heads and a second spray head for accumulating ink. According to the invention, the first nozzle is used for printing according to the nozzle precision, the fineness of the image is ensured, and the final ink amount is accumulated to the ink amount of the original printing precision by comparing the ink amount required by the original precision printing with the ink amount required by the nozzle precision printing and printing at the ink jetting position of the first nozzle by using the second nozzle according to the comparison result. Because the spray head is adopted for printing, the condition that the paper feeding distance is a small multiple of the hole distance is avoided, and printing progress dislocation caused by the conditions of machine paper feeding errors, spray head installation errors, machine shaking errors and the like can be prevented. In addition, the first nozzle is used for printing according to the nozzle precision, and the ink quantity which is combined with the second nozzle to print at the ink jetting position of the first nozzle so that the ink quantity reaches the original printing precision can obviously improve the uniformity of the printed image.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without making creative efforts, other drawings can be obtained according to the drawings, and these drawings are all within the protection scope of the present invention.
FIG. 1 is a flow chart of a printing method of the present invention to improve image uniformity;
FIG. 2 is a flowchart of determining a first amount of printing ink in the present invention;
FIG. 3 is a flowchart of determining a second amount of printing ink in the present invention;
FIG. 4 is a flow chart of determining dot matrix data according to the present invention;
FIG. 5 is a flow chart of calculating a reference ink amount according to the present invention;
FIG. 6 is a flowchart of a method for determining lattice data according to embodiment 2 of the present invention;
FIG. 7 is a schematic view showing the ink discharge of the first head in embodiment 2 of the present invention;
FIG. 8 is a schematic view of the ink discharge from a non-regulated head in embodiment 2 of the present invention;
FIG. 9 is a schematic diagram of adjusting the ink output of the inkjet head according to the present invention;
FIG. 10 is a flowchart of another method for determining lattice data according to embodiment 2 of the present invention;
FIG. 11 is a schematic diagram of a printing apparatus for improving image uniformity according to the present invention;
fig. 12 is a schematic structural view of a printing apparatus for improving image uniformity according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments 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. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. 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 phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element. It is within the scope of the present invention that the embodiments and individual features of the embodiments may be combined with each other without conflict.
Example 1:
as shown in fig. 1, an embodiment of the present invention discloses a printing method for improving image uniformity, in which a nozzle for printing an image to be printed includes a first nozzle and at least one second nozzle, and the method includes:
s1: acquiring an ink amount required by printing an image to be printed by adopting original printing precision as a first printing ink amount;
the present embodiment takes the amount of ink ejected to print an image with original printing accuracy as a reference standard, as shown in fig. 2, wherein a specific method of acquiring the first amount of printing ink is:
s11: acquiring the volume of each type of ink drop of the printing equipment;
the type in this embodiment is a type obtained by classifying the volumes of ink droplets, that is, ink droplets having the same volume are one type, and ink droplets having different volumes are classified into different types. By controlling the driving waveform of the ejection head, the ejection head of the printing device can eject ink droplets with different volumes, for example, some printing devices can eject a first ink droplet (large ink droplet), a second ink droplet (medium ink droplet) and a third ink droplet (small ink droplet), wherein the volume of the first ink droplet is larger than that of the second ink droplet, the volume of the second ink droplet is larger than that of the third ink droplet, in this embodiment, the number k of the types of ink droplets can be a positive integer greater than or equal to 2, that is, the ejection head can eject ink droplets with at least two different volumes.
S12: acquiring the quantity of each type of ink drop printed by the original printing precision of an image to be printed;
for example, the printing apparatus can eject the aforementioned first ink droplet, second ink droplet, and third ink droplet, and the number N1 of the first ink droplets ejected from the head, the number N2 of the second ink droplets ejected from the head, and the number N3 of the third ink droplets ejected from the head when printing with the original printing accuracy are found in this step.
S13: and calculating to obtain a first printing ink quantity according to the volume of each type of ink drop and the quantity of each type of ink drop.
The specific calculation method is that the volume of each type of ink drop is multiplied by the number of the type of ink drop to obtain the printing ink quantity of each type of ink drop, and then the printing ink quantities of all types of ink drops are added to obtain the first printing ink quantity. The method of calculating the first printing ink drop by taking the case that the aforementioned nozzle ejects ink drops of three different volumes as an example may be: m1= V1 × N1+ V2 × N2+ V3 × N3, where M1 is the first amount of printing ink, V1 is the volume of the first ink droplet, V2 is the volume of the second ink droplet, and V3 is the volume of the third ink droplet.
S2: acquiring the ink amount required by printing the image to be printed by adopting the nozzle precision as a second printing ink amount;
the precision of the nozzles is less than the original printing precision of the image to be printed, for example, the original printing precision is 720DPI, and the precision of the nozzles is 360DPI, and it can be understood that the precision of the nozzles and the original printing precision in this embodiment may also be other values as long as the precision of the nozzles is less than the original printing precision. Because the precision of the nozzle is less than the original printing precision, the ink amount required when printing is performed with the nozzle precision is less than the ink amount required when printing is performed with the original precision. As shown in fig. 3, the specific steps in which the second amount of printing ink is acquired are;
s21: acquiring the volume of each type of ink drop of the printing equipment;
s22: acquiring the number of ink drops of each type printed by adopting the nozzle precision;
for example, when printing according to the progress of the nozzle, three types of ink droplets, namely a first type of ink droplet, a second type of ink droplet and a third type of ink droplet, need to be ejected, and then the number of one type of ink droplet ejected by the nozzle, the number of second type of ink droplet ejected by the nozzle and the number of third type of ink droplet ejected by the nozzle when printing with the nozzle precision are found in this step.
S23: and calculating to obtain a second printing ink quantity according to the volume of each type of ink drop and the quantity of each type of ink drop.
The specific calculation method is to multiply the volume of each type of ink drop by the number of the type of ink drop to obtain the printing ink volume of each type of ink drop, and then add the printing ink volumes of all types of ink drops to obtain a second printing ink volume.
S3: determining dot matrix data corresponding to each nozzle according to the number N of the nozzles used for printing the image to be printed and an ink quantity difference Vd between the first printing ink quantity and the second printing ink quantity, so that the sum of the printing ink quantities of the nozzles is equal to the first printing ink quantity;
the printing equipment processes an image to be printed to obtain dot matrix data of the printed image, and then controls the spray head to spray ink at the corresponding position of a printing medium according to the dot matrix data to form the printed image.
Because the ink jet is completed by the nozzle, the dot matrix data for controlling the nozzle to jet ink is the dot matrix data corresponding to the nozzle. When the dot matrix data of the ejection head is determined, the amount of printing ink of the ejection head at the time of printing is also determined. The amount of printing ink of the head can be adjusted by adjusting the dot matrix data. The formula for calculating the ink amount difference in this step is Vd = M1-M2, where M1 is the first printing ink amount and M2 is the second printing ink amount.
S4: and controlling a first sprayer to print by adopting sprayer precision according to the dot matrix data, and controlling a second sprayer to print according to the dot matrix position printed by the first sprayer.
Because the first nozzle prints with the nozzle precision, the dot matrix data of the first nozzle determined in S3 is the dot matrix data printed with the nozzle precision. The dot matrix data is composed of a plurality of data distributed in a matrix array, and the positions of the data in the matrix array are dot matrix positions, for example, the dot matrix data of a first nozzle is represented by a matrix B with r rows and s columns, for example, the dot matrix data of a second nozzle is represented by a matrix C with r rows and s columns, wherein the data B ij The lattice position in the matrix array is ith row, jth column, data C ij The lattice position in the matrix array is also the ith row, jth column, in which case the data b ij And data C ij At the same lattice location. The data in the dot matrix data are divided into ink discharge data and ink non-discharge data, if the data is the ink discharge data, the nozzle is controlled to jet ink, and if the data is the ink non-discharge data, the nozzle is controlled not to discharge ink. The dot matrix position printed by the nozzle refers to the dot matrix position of the ink outlet data in the dot matrix data of the nozzle. Controlling the second nozzle to print according to the dot matrix position printed by the first nozzle means that if the data of a certain dot matrix position of the first nozzle is ink non-discharge data, the data of the same dot matrix position of the second nozzle is ink non-discharge data; if the data of a certain dot matrix position of the first nozzle is ink output data, the data of the same dot matrix position of the second nozzle can beThe ink discharge data may be non-ink discharge data. That is, the dot matrix position printed by the second nozzle can be selected only in the dot matrix position printed by the first nozzle. Because the dot matrix position of the ink output data corresponds to the ink jet position of the nozzles on the printing medium one by one, the second nozzle only jets ink at the ink jet position of the first nozzle.
The printing method of the present embodiment divides the heads into a first head that prints according to the head accuracy and a second head that performs ink volume accumulation. This embodiment utilizes first shower nozzle to spout and prints according to the shower nozzle precision, has guaranteed the fineness of image to print required china ink volume and print required china ink volume according to the shower nozzle precision through original precision and compare, utilize the second shower nozzle to print in order to pile up the china ink volume in the position of first shower nozzle inkjet simultaneously, make final china ink volume pile up the china ink volume of big original printing precision. Because the nozzle precision is adopted for printing, the condition that the paper feeding distance is a small multiple of the hole distance is avoided, and printing progress dislocation caused by the conditions of machine paper feeding errors, nozzle installation errors, machine shaking errors and the like is avoided. In addition, the first nozzle is used for printing according to the nozzle precision, and the ink quantity which is combined with the second nozzle for printing at the ink jetting position of the first nozzle so that the ink quantity reaches the original printing precision can obviously improve the precision of the printed image.
Example 2
As shown in fig. 4, in the present embodiment, the S3: determining dot matrix data corresponding to each nozzle according to the number N of the nozzles used for printing the image to be printed and the ink quantity difference Vd of the first printing ink quantity and the second printing ink quantity, and the method comprises the following steps:
s31: acquiring an ink amount difference Vd between a second printing ink amount and a first printing ink amount;
the method for calculating the ink amount difference comprises the following steps: vd = M1-M2, where M1 is the first printing ink amount and M2 is the second printing ink amount.
S32: acquiring dot matrix data printed by adopting the nozzle precision as dot matrix data of a first nozzle;
and processing the image to be printed according to the precision of the sprayer to obtain dot matrix data printed according to the precision of the sprayer, wherein the data is used as the dot matrix data for controlling the first sprayer to print so that the first sprayer prints according to the precision of the sprayer.
S33: determining a reference ink amount Vr according to the dot matrix data of the first nozzle;
after the dot matrix data of the first nozzle is determined, the ink jetting position and the ink jetting amount of the first nozzle during printing are determined, and the second printing ink amount is determined at the same time. Since the second printing ink amount is smaller than the first printing ink amount, the remaining ink amount is printed by the second head. Since the second head selects the ink discharge position among the positions from which the first head discharges ink, the ink amount data relating to the ink discharge amount of the first head can be extracted as the reference value of the ink amount of the second head from the first head dot matrix data.
S34: acquiring the number N of spray heads for printing an image to be printed;
the nozzles for printing an image to be printed include a first nozzle and a second nozzle, and thus the number N of the nozzles is a positive integer equal to or greater than 2.
S35: comparing the Vd/Vr with the size of (N-N1); where n1 is the number of first heads.
S36: and determining the dot matrix data of the second sprayer according to the comparison result.
As shown in fig. 5, as an example, in the present embodiment, the ink droplets ejected by the printing device include a first ink droplet, a second ink droplet, and a third ink droplet, wherein the volume of the first ink droplet is larger than the volume of the second ink droplet, and the volume of the second ink droplet is larger than the volume of the third ink droplet, and the S33: determining the reference ink amount Vr according to the dot matrix data of the first head, comprising the steps of:
s331: determining the number N1 of first ink drops and the number N2 of second ink drops required by the first nozzle for printing according to the dot matrix data of the first nozzle;
s332: acquiring the volume V1 of the first ink drop and the volume V2 of the second ink drop;
s333: a reference ink amount Vr is calculated, where Vr = V1 × N1+ V2 × N2.
In the foregoing example, the first head ejects ink droplets of three different volumes of the first type of ink droplet, the second type of ink droplet, and the third type of ink droplet when printing with the head accuracy. In order to improve printing efficiency while ensuring printing uniformity, the second head ejects first and second ink droplets having relatively large volumes in printing without ejecting third ink droplets having smaller volumes. When printing in this way, the ink amount of the first ink droplet ejected by the first head and the ink amount of the second ink droplet are used as reference ink amounts for determining the ink droplets ejected by the second head.
As shown in fig. 6, a specific method for determining the print data of the second head when the printing manner of the foregoing example is adopted will be described below. The number of the first nozzles is set as n1. And S36: determining the dot matrix data of the second nozzle according to the comparison result, comprising the following steps:
s361: if (Vd/Vr) > (N-N1), adjusting the third ink droplet discharging data in the dot matrix data of the first spray head into ink non-discharging data to obtain first middle dot matrix data of the second spray head;
as shown in fig. 7 and 8, each of the circles with hatching in fig. 7 and 8 represents a dot from which ink is ejected from the head, wherein the largest circle is a dot formed by a first ink droplet, the smallest circle is a dot formed by a second ink droplet, and the second largest circle is a dot formed by a second ink droplet. The first intermediate dot matrix data obtained by the data adjustment mode can enable the second nozzle to jet the first ink drops at the positions where the first nozzle jets the first ink drops, jet the second ink drops at the positions where the first nozzle jets the second ink drops and not discharge ink at the positions where the first nozzle jets the third ink drops, so that the printed image is uniform. However, when (Vd/Vr) > (N-N1) indicates that the second head cannot accumulate the amount of ink of the original printing accuracy if ink is discharged in the exact number of the first ink droplets and the second ink droplets in the first head. The following steps are adopted for adjustment in this embodiment:
s362: selecting at least one spray head from the second spray heads as an adjusting spray head;
s363: adjusting at least one part of the first intermediate dot matrix data which adopts the second ink drop to adopt the first ink drop to adopt the ink discharge data and then taking the adjusted data as the dot matrix data of the adjusting nozzle;
as shown in fig. 8 and 9, the largest circle in fig. 9 is a dot formed by a first ink droplet, and the second largest circle is a dot formed by a second ink droplet. The data adjusted by the steps can enable the second nozzle to jet the first ink drop with larger volume at the position of the second ink drop with the original equal jetting volume, so that the overall printing ink quantity of the second nozzle is improved, and the total ink quantity printed by all the nozzles can reach the ink quantity of the original printing precision.
S364: and if (N-N1) > 1, taking the first intermediate dot matrix data as the dot matrix data of the rest of the second nozzles.
Since the number of the second nozzles can be 1 or more than 1, if (N-N1) > 1, it means that there is more than one second nozzle, at this time, a part of the nozzles can be used as the adjusting nozzles, and the rest of the nozzles are not adjusted (non-adjusting nozzles), and the printing is directly performed according to the first intermediate dot matrix data. If (N-N1) =1, it means that there are only 1 second heads, and this second head can only be used as an adjusted head, and there are no unadjusted heads in the second head, so step S364 may be omitted.
Since the second head prints using only the dots having relatively large volumes of the first ink droplet and the second ink droplet, if all heads eject ink in accordance with the aforementioned reference ink amount, the total ink amount printed may exceed the ink amount required for the original printing accuracy, as shown in fig. 10, and the processing for this case may be performed in accordance with the following steps:
s3601: if (Vd/Vr) < (N-N1), adjusting the data of ink discharge of the third ink drop in the dot matrix data of the first spray head into the data of no ink discharge to obtain first middle dot matrix data of the second spray head;
s3602: selecting at least one spray head from the second spray heads as an adjusting spray head;
s3603: adjusting at least one part of the intermediate dot matrix data by adopting the first ink drop ink discharge data into the second ink drop ink discharge data to be used as the dot matrix data for adjusting the spray head;
the volume of the second ink drop is smaller, so that the printing ink amount of the adjusting nozzle is reduced.
S3604: if (N-N1) > 1, taking the first intermediate dot matrix data as the dot matrix data of the rest of the second nozzles;
because the number of the second nozzles can be 1 or more than 1, if (N-N1) > 1, the number of the second nozzles is more than one, at this time, a part of the nozzles can be used as the adjusting nozzles, and the rest of the nozzles are not adjusted (non-adjusting nozzles), and the printing is directly carried out according to the first intermediate dot matrix data. If (N-N1) =1, it means that there are only 1 second heads, and this second head can only be used as an adjusted head, and there is no unadjusted head in the second head, so step S3604 can be omitted.
If (Vd/Vr) is equal to (N-N1), adjusting the data of ink discharge by adopting the third ink drop in the dot matrix data of the first spray head into the data of no ink discharge to be used as the dot matrix data of the second spray head;
in the method, the second nozzle is divided into an adjusting nozzle and a non-adjusting nozzle (the nozzles except the adjusting nozzle in the second nozzle), the adjusting nozzle mainly adopts the second ink drops with relatively small ink volume to print, and finally the whole printing ink volume is the same as the printing ink volume of the original printing precision.
As a preferred mode, the number of the first spray heads is 1, and the second spray heads spray ink at the ink spraying positions of the first spray heads, so that the fine image part can be printed by the same spray heads at one time, the printing effect is guaranteed, and the printing efficiency is improved. When the method of the embodiment is adopted to carry out multi-pass scanning printing, the paper feeding distance between two adjacent passes is the height of one sprayer, so that the printing yield can be obviously improved.
Example 3
The present embodiment provides another method for determining dot matrix data of a nozzle, in this embodiment, the ink droplets ejected by the printing device include a first ink droplet, a second ink droplet and a third ink droplet, wherein the volume of the first ink droplet is larger than that of the second ink droplet, and the volume of the second ink droplet is larger than that of the third ink droplet, in S33: determining an ink amount required for printing the dot matrix data of the first nozzle in the reference ink amount Vr as a reference ink amount Vr according to the dot matrix data of the first nozzle;
and S36: determining the dot matrix data of the second nozzle according to the comparison result, comprising the following steps:
s3611: if (Vd/Vr) > (N-N1), selecting at least one spray head from the second spray heads as an adjusting spray head;
s3612: adjusting at least a part of the dot matrix data of the first nozzle to adopt the ink drop ink discharge data with a smaller volume as the dot matrix data of the adjusted nozzle;
for example, the data of the third ink droplet may be adjusted to the data of the second ink droplet or the data of the first ink droplet, or the data of the second ink droplet may be adjusted to the data of the first ink droplet.
S3613: if (N-N1) > 1, taking the dot matrix data of the first spray head as the dot matrix data of the rest spray heads in the second spray head;
wherein n1 is the number of the first nozzles, and n1 is a positive integer greater than or equal to 1. The second nozzle is divided into an adjusting nozzle and a non-adjusting nozzle in the embodiment, and the non-adjusting nozzle and the first nozzle spray the same number of first ink droplets, second ink droplets and third ink droplets. The nozzles are adjusted to change the first nozzle to print data corresponding to the smaller ink drops into the first nozzle to print the data by using the larger ink drops, so that the total printing ink amount can reach the ink amount required by the original printing precision.
In this embodiment, since the number of the second nozzles may be 1 or more than 1, if (N-N1) > 1 indicates that there is more than one second nozzle, a part of the nozzles may be used as the adjusting nozzles, and the rest of the nozzles are not adjusted (non-adjusting nozzles), and the printing is directly performed according to the dot matrix data of the first nozzle. If (N-N1) =1, it means that there are only 1 second heads, and this second head can only be used as an adjusted head, and there is no non-adjusted head in the second head, so step S3613 may be omitted.
Example 4
Referring to fig. 11, the present embodiment provides a printing apparatus for improving image uniformity, including:
the printing device comprises a first printing ink quantity acquisition module, a second printing ink quantity acquisition module and a printing module, wherein the first printing ink quantity acquisition module is used for acquiring an ink quantity required by printing of an image to be printed with original printing precision as a first printing ink quantity;
the second printing ink quantity acquisition module is used for acquiring the ink quantity required by printing the image to be printed by adopting the nozzle precision as a second printing ink quantity;
the nozzle dot matrix data determining module is used for determining dot matrix data corresponding to each nozzle according to the number N of the nozzles used for printing the image to be printed and an ink quantity difference value Vd of the first printing ink quantity and the second printing ink quantity, so that the sum of the printing ink quantities of the nozzles is equal to the first printing ink quantity;
and the control module is used for controlling the first spray head to print by adopting spray head precision according to the dot matrix data and controlling the second spray head to print according to the dot matrix position printed by the first spray head.
The control module further comprises:
an ink amount difference obtaining submodule for obtaining an ink amount difference Vd between the second printing ink amount and the first printing ink amount;
the first nozzle data acquisition submodule: the first nozzle data acquisition submodule is used for acquiring dot matrix data printed by adopting the nozzle precision as the dot matrix data of the first nozzle;
the reference ink amount acquisition submodule is used for determining a reference ink amount Vr according to the dot matrix data of the first nozzle;
the nozzle number obtaining submodule is used for obtaining the nozzle number N for printing an image to be printed;
the comparison sub-module is used for comparing the Vd/Vr with the N-N1;
and the second spray head data acquisition submodule is used for determining the dot matrix data of the second spray head according to the comparison result.
Example 5
In addition, the printing method for improving image uniformity of the embodiment of the present invention described in conjunction with fig. 12 may be implemented by a printing apparatus for improving image uniformity. Fig. 12 is a schematic diagram illustrating a hardware structure of a printing apparatus for improving image uniformity according to an embodiment of the present invention.
A printing device to improve image uniformity may include a processor 401 and a memory 402 storing computer program instructions.
Specifically, the processor 401 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing embodiments of the present invention.
Memory 402 may include a mass storage for data or instructions. By way of example, and not limitation, memory 402 may include a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, tape, or Universal Serial Bus (USB) 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 certain embodiments, memory 402 comprises Read Only Memory (ROM). Where appropriate, the ROM may be mask-programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically Erasable PROM (EEPROM), electrically Alterable ROM (EAROM), or flash memory, or a combination of two or more of these.
The processor 401 reads and executes computer program instructions stored in the memory 402 to implement the data addressing method for area random printing in any of the above embodiments.
The printing device to improve image uniformity in one example may also include a communication interface 403 and a bus 410. As shown in fig. 6, the processor 401, the memory 402, and the communication interface 403 are connected via 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.
The bus 410 includes hardware, software, or both that couple components for fractional ink output 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 (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) 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 illustrated with respect to embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
Example 6
In addition, in combination with the printing method for improving the uniformity of the image in the above embodiments, the embodiments of the present invention may be implemented by providing a computer-readable storage medium. 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 a printing method for improving image uniformity.
The above is a detailed description of the printing method, apparatus, device and storage medium for improving image uniformity according to the embodiments of the present invention.
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.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments noted in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed at the same time.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.

Claims (11)

1. A printing method for improving image uniformity, wherein nozzles used for printing include at least one first nozzle and at least one second nozzle, the method comprising:
s1: acquiring an ink amount required by printing an image to be printed by adopting original printing precision as a first printing ink amount;
s2: acquiring the ink amount required by printing the image to be printed by adopting the nozzle precision as a second printing ink amount;
s3: determining dot matrix data corresponding to each nozzle according to the number of the nozzles for printing the image to be printed and an ink quantity difference value between the first printing ink quantity and the second printing ink quantity, so that the sum of the printing ink quantities of the nozzles is equal to the first printing ink quantity;
s4: and controlling a first sprayer to print by adopting sprayer precision according to the dot matrix data, and controlling a second sprayer to print according to the dot matrix position printed by the first sprayer.
2. The printing method for improving image uniformity according to claim 1, wherein said S1: acquiring an ink amount required by printing an image to be printed with original printing precision as a first printing ink amount, and comprising the following steps;
s11: acquiring the volume of each type of ink drop of the printing equipment;
s12: acquiring the quantity of each type of ink drop printed by the original printing precision of an image to be printed;
s13: and calculating to obtain a first printing ink quantity according to the volume of each type of ink drop and the quantity of each type of ink drop.
3. The printing method for improving the uniformity of an image according to claim 1, wherein S2: acquiring the ink amount required by printing an image to be printed by adopting the nozzle precision as a second printing ink amount, and comprising the following steps;
s21: acquiring the volume of each type of ink drop of the printing equipment;
s22: acquiring the number of ink drops of each type printed by adopting the nozzle precision;
s23: and calculating to obtain a second printing ink quantity according to the volume of each type of ink drop and the quantity of each type of ink drop.
4. The printing method for improving image uniformity according to any one of claims 1 to 3, wherein the S3: determining dot matrix data corresponding to each nozzle according to the number N of the nozzles used for printing the image to be printed and the ink quantity difference Vd between the first printing ink quantity and the second printing ink quantity, and the method comprises the following steps:
s31: acquiring an ink amount difference Vd between a second printing ink amount and a first printing ink amount;
s32: acquiring dot matrix data printed by adopting the nozzle precision as dot matrix data of a first nozzle;
s33: determining a reference ink amount Vr according to the dot matrix data of the first nozzle;
s34: acquiring the number N of nozzles for printing an image to be printed;
s35: comparing the Vd/Vr with the N-N1;
s36: determining dot matrix data of the second nozzle according to the comparison result;
wherein n1 is the number of the first nozzles, and n1 is a positive integer greater than or equal to 1.
5. The printing method for improving image uniformity according to claim 4, wherein: the ink droplets ejected by the printing device include a first ink droplet, a second ink droplet and a third ink droplet, wherein the volume of the first ink droplet is larger than that of the second ink droplet, and the volume of the second ink droplet is larger than that of the third ink droplet, S33: determining the reference ink amount Vr according to the dot matrix data of the first head, comprising the steps of:
s331: determining the number N1 of first ink drops and the number N2 of second ink drops required by the first nozzle for printing according to the dot matrix data of the first nozzle;
s332: acquiring the volume V1 of the first ink drop and the volume V2 of the second ink drop;
s333: a reference ink amount Vr is calculated, where Vr = V1 × N1+ V2 × N2.
6. The printing method for improving image uniformity according to claim 5, wherein the step S36: and determining the dot matrix data of the second nozzle according to the comparison result, comprising the following steps of:
s361: if (Vd/Vr) > (N-N1), adjusting the third ink droplet discharging data in the dot matrix data of the first spray head into non-discharging data to obtain first middle dot matrix data of the second spray head;
s362: selecting at least one spray head from the second spray heads as an adjusting spray head;
s363: adjusting at least one part of the first intermediate dot matrix data which adopts the second ink drop to adopt the first ink drop to discharge ink to be used as the dot matrix data of the adjusting nozzle;
s364: and if (N-N1) > 1, taking the first intermediate dot matrix data as the dot matrix data of the rest of the second nozzles.
7. The printing method for improving image uniformity according to claim 5, wherein the step S36: and determining the dot matrix data of the second nozzle according to the comparison result, comprising the following steps of:
s3601: if (Vd/Vr) < (N-N1), adjusting the third ink droplet discharging data in the dot matrix data of the first spray head to be non-discharging data to obtain first middle dot matrix data of the second spray head;
s3602: selecting at least one spray head from the second spray heads as an adjusting spray head;
s3603: adjusting at least one part of the intermediate dot matrix data by adopting the first ink drop ink discharge data into the second ink drop ink discharge data to be used as the dot matrix data for adjusting the spray head;
s3604: and if (N-N1) > 1, taking the first intermediate dot matrix data as the dot matrix data of the rest of the second nozzles.
8. The printing method for improving image uniformity according to claim 4, wherein: the ink droplets ejected by the printing device include a first ink droplet, a second ink droplet, and a third ink droplet, wherein the volume of the first ink droplet is larger than the volume of the second ink droplet, and the volume of the second ink droplet is larger than the volume of the third ink droplet, at S33: determining an ink amount required for printing the dot matrix data of the first nozzle in the reference ink amount Vr as the reference ink amount Vr according to the dot matrix data of the first nozzle;
and S36: and determining the dot matrix data of the second nozzle according to the comparison result, comprising the following steps of:
s3611: if (Vd/Vr) > (N-N1), selecting at least one spray head from the second spray heads as an adjusting spray head;
s3612: adjusting at least a part of the dot matrix data of the first nozzle to adopt the ink drop ink discharge data with a smaller volume as the dot matrix data of the adjusted nozzle;
s3613: and if (N-N1) > 1, taking the dot matrix data of the first spray head as the dot matrix data of the rest spray heads in the second spray head.
9. A printing apparatus for improving image uniformity, comprising:
the printing device comprises a first printing ink quantity acquisition module, a second printing ink quantity acquisition module and a printing module, wherein the first printing ink quantity acquisition module is used for acquiring an ink quantity required by printing an image to be printed with original printing precision as a first printing ink quantity;
the second printing ink quantity acquisition module is used for acquiring the ink quantity required by printing the image to be printed by adopting the nozzle precision as a second printing ink quantity;
the nozzle dot matrix data determining module is used for determining dot matrix data corresponding to each nozzle according to the number N of the nozzles used for printing the image to be printed and an ink quantity difference Vd between the first printing ink quantity and the second printing ink quantity, so that the sum of the printing ink quantities of the nozzles is equal to the first printing ink quantity;
and the control module is used for controlling the first spray head to print by adopting spray head precision according to the dot matrix data and controlling the second spray head to print according to the dot matrix position printed by the first spray head.
10. A printing apparatus for improving image uniformity, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of any of claims 1-8.
11. A storage medium having computer program instructions stored thereon, which when executed by a processor implement the method of any one of claims 1-8.
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