CN114074478A - Ink jet printing control method, control device and ink jet printing system - Google Patents
Ink jet printing control method, control device and ink jet printing system Download PDFInfo
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- CN114074478A CN114074478A CN202011580878.9A CN202011580878A CN114074478A CN 114074478 A CN114074478 A CN 114074478A CN 202011580878 A CN202011580878 A CN 202011580878A CN 114074478 A CN114074478 A CN 114074478A
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- 238000007641 inkjet printing Methods 0.000 title claims abstract description 160
- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000002474 experimental method Methods 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 8
- 239000000976 ink Substances 0.000 description 384
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- 238000010586 diagram Methods 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
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Classifications
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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
- B41J2/07—Ink jet characterised by jet control
- B41J2/11—Ink jet characterised by jet control for ink spray
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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
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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
- 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
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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
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
- B41J3/543—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements with multiple inkjet print heads
Abstract
The invention relates to an inkjet printing control method, an inkjet printing control device and an inkjet printing system. The ink jet printing control method comprises the following steps: acquiring the actual ink-jet volume of single ink-jet of each nozzle on the ink-jet printing head in an ink-jet experiment; acquiring the ink required volume of a pixel unit; selecting a plurality of nozzles to be jetted according to the ink required volume to jet ink to the pixel units in sequence; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit. By adopting the ink-jet printing control method, the actual volume of the ink injected into the pixel unit after multiple times of ink jet is closer to the ink required volume of the pixel unit, the difference between the actual volume of the injected ink and the required volume of the pixel unit is reduced, and the film forming uniformity is improved.
Description
Technical Field
The present invention relates to the field of inkjet printing technologies, and in particular, to an inkjet printing control method, an inkjet printing control apparatus, and an inkjet printing system.
Background
In the manufacturing process of an Organic Light Emitting Diode (OLED) or quantum dot light emitting diode (QLED) device, inkjet printing is a more common processing method. The corresponding functional material ink can be injected into the pixel unit by inkjet printing to prepare the corresponding functional layer. Such as a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an emitting layer material (EML), and the like, prepared by inkjet printing.
One form of inkjet printing is shown in fig. 1. The inkjet print head 100 is provided with nozzles, and functional material droplets 400 are injected into the pixel unit 301 through the nozzles of the inkjet print head 100, and then corresponding functional layers are formed in the pixel unit by subsequent film formation. In an actual inkjet printing process, in order to ensure the volume of ink, it is generally necessary to perform ink ejection in a pixel unit a plurality of times. However, in the conventional multiple ink-jet method, the difference between the volume of the ink injected into the pixel unit 301 and the required volume of the ink in the pixel unit 301 is large, and the difference between the volumes of the inks actually injected into the pixel units 301 is large, so that the problem of uneven film thickness is easily caused in the subsequent film-forming process.
Disclosure of Invention
In view of the above, it is desirable to provide an inkjet printing control method, an inkjet printing control apparatus, and an inkjet printing system capable of effectively reducing the difference between the volume of the actually injected ink in the pixel unit and the required volume thereof.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an ink jet printing control method comprising the steps of:
acquiring the actual ink-jet volume of single ink-jet of each nozzle on the ink-jet printing head in an ink-jet experiment;
acquiring the ink required volume of a pixel unit;
selecting a plurality of nozzles to be jetted according to the ink required volume to jet ink to the pixel units in sequence; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit.
In one embodiment, the method further comprises the following steps before acquiring the actual ink jetting volume jetted by each nozzle on the ink jet printing head in a single time in the ink jetting experiment:
acquiring the theoretical ink-jet volume of each nozzle on the ink-jet printing head for single ink-jet;
and setting a preset ink-jet volume range according to the theoretical ink-jet volume, wherein the upper limit of the preset ink-jet volume range is larger than the theoretical ink-jet volume, and the lower limit of the preset ink-jet volume range is smaller than the theoretical ink-jet volume.
In one embodiment, the upper limit of the preset ink ejection volume range is not more than 102.5% of the theoretical ink ejection volume, and the lower limit of the preset ink ejection volume range is not less than 97.5% of the theoretical ink ejection volume.
In one embodiment, when a plurality of nozzles to be jetted ink are selected according to the ink requirement volume and sequentially jetted ink for the pixel unit, the actual jetting volume of at least one nozzle is smaller than the theoretical jetting volume, and the actual jetting volume of at least one nozzle is larger than the theoretical jetting volume.
In one embodiment, before selecting a plurality of nozzles to be jetted according to the ink demand volume to jet ink to the pixel units in sequence, the method further comprises the following steps:
obtaining the multiple of the ink demand volume and the theoretical ink-jet volume; and when a plurality of nozzles to be jetted are selected according to the ink required volume to jet ink to the pixel unit in sequence, the number of the plurality of nozzles to be jetted is equal to the multiple.
In one embodiment, before selecting a plurality of nozzles to be jetted according to the ink demand volume to jet ink to the pixel units in sequence, the method further comprises the following steps:
and correcting the nozzles with the actual ink jetting volume exceeding the preset ink jetting volume range in the ink jetting experiment so as to enable the actual ink jetting volume to be within the preset ink jetting volume range.
In one embodiment, when a plurality of nozzles to be jetted ink are selected according to the ink requirement volume and sequentially jetted ink to the pixel unit, the nozzle closest to the current nozzle to be jetted ink is selected from a plurality of nozzles with the same actual jetting volume as the nozzle to be jetted ink later.
In one embodiment, when a plurality of nozzles to be jetted are selected according to the ink requirement volume to jet ink to the pixel unit in sequence, if the sum of the actual jetting volumes of a plurality of groups of nozzles is equal to the ink requirement volume of the pixel unit, a group of nozzles with the smallest sum of the distances among the nozzles is selected to jet ink to the pixel unit.
An ink-jet printing control device comprises an actual ink-jet volume acquisition module, an ink required volume acquisition module and an ink-jet printing control module;
the actual ink-jet volume acquisition module is used for acquiring the actual ink-jet volume of single ink-jet of each nozzle on the ink-jet printing head in an ink-jet experiment;
the ink required volume acquisition module is used for acquiring the ink required volume of the pixel unit;
the ink-jet printing control module is used for selecting a plurality of nozzles to be subjected to ink jet according to the ink required volume to sequentially jet ink to the pixel units; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit.
An inkjet printing system comprising an inkjet printhead and a controller;
the ink-jet printing head is used for carrying out ink-jet printing on the substrate;
the controller is used for acquiring the actual ink jetting volume of single ink jetting of each nozzle on the ink jet printing head in an ink jetting experiment;
the controller is further used for acquiring the ink required volume of the pixel unit;
the controller is also used for selecting a plurality of nozzles to be jetted according to the ink required volume to jet ink to the pixel units in sequence; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit.
A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, carries out the steps of the inkjet printing control method as described in any one of the above embodiments.
The ink jet printing control method comprises the following steps: acquiring the actual ink-jet volume of single ink-jet of each nozzle on the ink-jet printing head in an ink-jet experiment; acquiring the ink required volume of a pixel unit; selecting a plurality of nozzles to be jetted according to the ink required volume to jet ink to the pixel units in sequence; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit. By adopting the ink-jet printing control method, in the ink-jet printing process, the nozzle to be subjected to ink jet is selected, and when ink is jetted for a certain pixel unit for multiple times, the actual volume of the ink injected into the pixel unit after multiple times of ink jet is closer to the ink required volume of the pixel unit, the difference between the actual volume of the injected ink in the pixel unit and the required volume thereof is reduced, and the film forming uniformity is improved.
Further, when a plurality of nozzles to be jetted ink are selected according to the ink required volume to jet ink to the pixel units in sequence, the actual jetting volume of at least one nozzle is smaller than the theoretical jetting volume, and the actual jetting volume of at least one nozzle is larger than the theoretical jetting volume. Therefore, the actual ink-jet volumes of the nozzles to be subjected to ink jet can be well complemented, the difference between the volume of the actually injected ink and the required volume in the pixel unit is further reduced, and the film forming uniformity is improved.
Drawings
FIG. 1 is a schematic diagram of an inkjet printhead injecting ink drops into a pixel cell according to the background of the invention;
FIG. 2 is a schematic diagram of a defect of conventional inkjet printing according to the present invention;
FIG. 3 is a schematic view of a nozzle selection in accordance with an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating an inkjet printing control method according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart illustrating an inkjet printing control method according to another embodiment of the present invention;
FIG. 6 is a block diagram of an inkjet printing control apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an inkjet printing system according to an embodiment of the present invention;
the notation in the figure is:
100. an inkjet print head; 101. a first nozzle; 102. a second nozzle; 103. a third nozzle; 104. a fourth nozzle; 105. a fifth nozzle; 106. a sixth nozzle; 200. linear streaking; 300. a substrate; 301. a pixel unit; 400. droplets of functional material; 500. a controller; 501. the direction of movement of the ink fill member; 502. a cross beam; 503. an ink filling member; 504. a camera device; 505. a substrate holder; 506. vacuum adsorption; 507. nitrogen gas; 600. a theoretical ink-jet volume acquisition module; 601. presetting an ink-jet volume range setting module; 602. an actual ink ejection volume acquisition module; 603. a nozzle correction module; 604. an ink demand volume acquisition module; 605. a multiple obtaining module; 606. and the ink jet printing control module.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the accompanying examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the description of the present invention, it should be understood that the terms used in the present invention are used in the description of the present invention, and it should be understood that the terms "central", "upper", "lower", "bottom", "inner", "outer", and the like, which are used in the present invention, indicate their orientations and positional relationships are merely used to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present invention.
It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention. Two elements will likewise be considered to be in a "joined" relationship when the two elements are of unitary construction.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 again, in the inkjet printing, functional material ink is injected into the pixel unit 301 through a nozzle of the inkjet printhead 100. In this process, in order to secure the volume of the ink, it is generally necessary to perform ink ejection a plurality of times in one pixel unit 301. However, the volume of ink injected into each pixel unit 301 by the conventional multiple ink-jet method is greatly different from the required volume of ink in the pixel unit, and the problem of uneven thickness is likely to occur in the subsequent film-forming process. Referring to fig. 2, after ink is injected by the conventional multi-time ink-jet method, the difference between the volume of the ink injected into the pixel unit 301 and the required volume of the ink in the pixel unit is large, so that the volume of the ink actually injected into each pixel unit 301 is large, and after the functional device is manufactured, when the device is lighted, the adjacent pixel unit columns are displayed unevenly, which is represented as the linear stripe 200 on the surface of the device. This may seriously degrade the display effect of the functional device and even cause the functional device to be discarded.
In view of this, it is necessary to provide an inkjet printing control method, an inkjet printing control apparatus, an inkjet printing system, a computer device, and a computer-readable storage medium capable of effectively reducing the difference between the volume of ink actually injected in the pixel unit 301 and the required volume thereof.
Specifically, an embodiment of the present invention provides an inkjet printing control method. The ink jet printing control method comprises the following steps: acquiring the actual ink-jet volume of single ink-jet of each nozzle on the ink-jet printing head in an ink-jet experiment; acquiring the ink required volume of a pixel unit; selecting a plurality of nozzles to be jetted according to the ink required volume to jet ink to the pixel units in sequence; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit. By adopting the ink-jet printing control method in the embodiment, in the ink-jet printing process, through selecting the nozzle to be subjected to ink jet, when ink is jetted for a certain pixel unit for multiple times, the actual volume of the ink injected into the pixel unit after multiple times of ink jet is closer to the required volume of the ink of the pixel unit, the difference between the actual volume of the injected ink in the pixel unit and the required volume of the injected ink in the pixel unit is reduced, and the film forming uniformity is improved.
It is understood that the actual ink ejection volume of each nozzle on the inkjet print head 100 in a single ink ejection is obtained by performing an ink ejection experiment before ink ejection printing.
Further, the method also comprises the following steps before acquiring the actual ink jetting volume jetted by each nozzle on the ink jet printing head in a single time in the ink jetting experiment: acquiring the theoretical ink-jet volume of single ink-jet of each nozzle on the ink-jet printing head; and setting a preset ink-jet volume range according to the theoretical ink-jet volume, wherein the upper limit of the preset ink-jet volume range is larger than the theoretical ink-jet volume, and the lower limit of the preset ink-jet volume range is smaller than the theoretical ink-jet volume.
In the present invention, the theoretical ink ejection volume of a single ink ejection from each nozzle means the ink requirement volume of the pixel unit 301 divided by the number of times of ink ejection when ink is ejected multiple times. For example, the ink requirement volume of the pixel unit 301 is 20pL (1 pL-10)-12L), by two inkjets, the theoretical inkjet volume at this time was 10 pL. For another example, the ink requirement volume of the pixel unit 301 is 30pL, and when the three times of ink jetting are performed, the theoretical ink jetting volume is 10 pL. It is understood that the ink requirement volume of the pixel unit 301 is V, and the theoretical ink ejection volume is (V/n) when the ink is ejected n times, where n is a positive integer.
It can be understood that the sum of the actual ink ejection volumes of the plurality of nozzles to be ejected is equal to the ink demand volume, the sum of the actual ink ejection volumes of the plurality of nozzles to be ejected in one ink ejection stroke (the plurality of nozzles to be ejected perform ink ejection once) is equal to the ink demand volume, or the sum of the actual ink ejection volumes of the plurality of nozzles to be ejected in a plurality of ink ejection strokes (the plurality of nozzles to be ejected perform ink ejection for the same plurality of times) is equal to the ink demand volume.
In a specific example, the upper limit of the preset ink ejection volume range is greater than the theoretical ink ejection volume but not more than 102.5% of the theoretical ink ejection volume, and the lower limit of the preset ink ejection volume range is less than the theoretical ink ejection volume but not less than 97.5% of the theoretical ink ejection volume. In the ink jetting process of the nozzle, a certain error may exist between the actual ink jetting volume of the nozzle and the theoretical ink jetting volume of the nozzle. After studying the actual condition of ink jetting by the nozzles, the theoretical ink jetting volume of the nozzles and the ink requirement volume of the pixel unit 301, the inventor finds that the upper limit of the preset ink jetting volume range is larger than the theoretical ink jetting volume but not more than 102.5% of the theoretical ink jetting volume, and the lower limit of the preset ink jetting volume range is smaller than the theoretical ink jetting volume but not less than 97.5% of the theoretical ink jetting volume, so that the total volume of ink injected into the pixel unit 301 after multiple times of ink jetting can be closer to the ink requirement volume of the pixel unit 301, the actual ink volume in each pixel unit 301 can be closer, the ink volume difference in the pixel unit 301 can be further reduced, and the film forming uniformity can be improved. It is understood that, for example, the upper limit of the preset ink ejection volume range is larger than the theoretical ink ejection volume but not more than 101.5% of the theoretical ink ejection volume, and the lower limit of the preset ink ejection volume range is smaller than the theoretical ink ejection volume but not less than 98.5% of the theoretical ink ejection volume. The upper limit of the preset ink ejection volume range is larger than the theoretical ink ejection volume but not more than 101% of the theoretical ink ejection volume, and the lower limit of the preset ink ejection volume range is smaller than the theoretical ink ejection volume but not less than 98% of the theoretical ink ejection volume.
Preferably, when a plurality of nozzles to be jetted ink are selected according to the ink requirement volume to jet ink to the pixel unit in sequence, the actual jetting volume of at least one nozzle is smaller than the theoretical jetting volume, and the actual jetting volume of at least one nozzle is larger than the theoretical jetting volume. Therefore, the actual ink-jet volumes of the nozzles to be subjected to ink jet can be well complemented, the difference between the volume of the actually injected ink and the required volume in the pixel unit is further reduced, and the film forming uniformity is improved.
For better understanding of the present invention, the following description is made for selecting a plurality of nozzles to be ejected according to the required ink volume to sequentially eject ink to the pixel unit 301. For example, in a specific example, the theoretical ink ejection volume of a single ink ejection from the nozzle is (V/n), the error range is δ (unit is%), and the preset ink ejection volume range is (V/n) × (1- δ) to (V/n) × (1+ δ). In a range not exceeding a preset ink ejection volume, a plurality of nozzles to be ejected are selected to sequentially eject ink to the pixel unit 301, and the actual ink ejection volume of each nozzle to be ejected does not exceed a preset ink ejection volume range (V/n) x (1- δ) to (V/n) x (1+ δ). The actual ink jetting volume of at least one nozzle to be jetted is smaller than the theoretical ink jetting volume (V/n), the actual ink jetting volume of at least one nozzle to be jetted is larger than the theoretical ink jetting volume (V/n), and the sum of the actual ink jetting volumes of a plurality of nozzles to be jetted is equal to the ink requirement volume. Specifically, for example, the theoretical ink ejection volume of a single ink ejection from the nozzle is 10pL, the upper limit of the preset ink ejection volume range is 102.5% of the theoretical ink ejection volume, and the lower limit of the preset ink ejection volume range is 97.5% of the theoretical ink ejection volume. At this time, the preset ink jet volume range is 9.75pL to 10.25pL, a plurality of nozzles to be subjected to ink jet are selected in the range of 9.75pL to 10.25pL according to the ink required volume to sequentially jet ink to the pixel unit 301, the actual ink jet volume of at least one nozzle to be subjected to ink jet in the nozzles to be subjected to ink jet is smaller than the theoretical ink jet volume of 10pL, and the actual ink jet volume of at least one nozzle to be subjected to ink jet is larger than the theoretical ink jet volume of 10 pL. For example, the actual ink ejection volumes of the nozzles to be ejected are set to 10.1pL, 10.2pL, 9.9pL, 9.8pL, and the like, respectively.
Referring to fig. 3, as a specific example of nozzle selection in the present invention, in the present example, the inkjet print head 100 is provided with 6 nozzles, which are respectively referred to as a first nozzle 101, a second nozzle 102, a third nozzle 103, a fourth nozzle 104, a fifth nozzle 105, and a sixth nozzle 106. The actual ink ejection volumes of the first nozzle 101, the second nozzle 102, the third nozzle 103, the fourth nozzle 104, the fifth nozzle 105, and the sixth nozzle 106 in which ink is ejected at a single time are respectively denoted as V1、V2、V3、V4、V5、V6. During ink-jet printing, a plurality of nozzles to be ink-jetted are selected from 6 nozzles according to the ink required volume of the pixel unit 301 to sequentially jet ink to the pixel unit 301, and in the selection process, V is controlled1、V2、V3、V4、V5、V6At least one is smaller than (V/n), at least one is larger than (V/n), and the sum of the actual ink jetting volumes of the plurality of nozzles to be jetted which are selected by the control is equal to the ink requirement volume. It will be appreciated that a corresponding number of nozzles may be provided on the inkjet printhead 100 as desired, and that the number of nozzles may be, but is not limited to, 2, 3, 4, 5, 6, 7, 8, etc.
Specifically, the actual ink ejection volumes of the first nozzle 101, the second nozzle 102, the third nozzle 103, the fourth nozzle 104, the fifth nozzle 105, and the sixth nozzle 106 ejected at a single time are respectively denoted as V1＝10.1pL、V2＝10.2pL、V3＝10.1pL、V4＝9.9pL、V5＝9.9pL、V69.8 pL. When the required ink volume of the pixel unit 301 is 20pL, the first nozzle 101 and the fourth nozzle 104 are selected to sequentially eject ink, or the first ejection is performedThe nozzles 101 and the fifth nozzle 105 sequentially eject ink, or the second nozzle 102 and the sixth nozzle 106 sequentially eject ink, or the third nozzle 103 and the fourth nozzle 104 sequentially eject ink, or the third nozzle 103 and the fifth nozzle 105 sequentially eject ink.
In a specific example, before a plurality of nozzles to be jetted are selected according to the ink requirement volume to jet ink to the pixel units in sequence, the method further comprises the following steps: obtaining the multiple of the ink required volume and the theoretical ink-jet volume; when a plurality of nozzles to be jetted ink are selected according to the ink required volume to jet ink to the pixel units in sequence, the number of the nozzles to be jetted ink is equal to the multiple. The number of the to-be-jetted nozzles in the corresponding number is selected according to the multiple of the ink requirement volume and the theoretical ink jetting volume, so that the number of the to-be-jetted nozzles can be rapidly determined, the nozzles with the appropriate actual ink jetting volume can be selected according to the determined number of the to-be-jetted nozzles, the improvement of the working efficiency is facilitated, and the accuracy of the total volume of ink jetted by the nozzles is improved.
In a specific example, before a plurality of nozzles to be jetted are selected according to the ink requirement volume to jet ink to the pixel units in sequence, the method further comprises the following steps: the nozzles whose actual ink ejection volumes exceeded the preset ink ejection volume range in the ink ejection experiment were corrected so that their actual ink ejection volumes were within the preset ink ejection volume range. When the nozzle is used for jetting ink, the actual ink jetting volume of the nozzle exceeds the preset ink jetting volume range due to the fact that the nozzle is possibly influenced by actual operation conditions or equipment and the like, the nozzle needs to be corrected to enable the actual ink jetting volume to be within the preset ink jetting volume range, ink jetting accuracy is improved, and the utilization rate of the nozzle can be improved. More specifically, when the actual ink ejection volume of a nozzle is found to be out of the preset ink ejection volume range, the actual ink ejection volume of the nozzle is corrected to be within the preset ink ejection volume range by the parameter setting of the ink ejection system.
In a preferred example, when a plurality of nozzles to be ejected are selected according to the ink demand volume to sequentially eject ink to the pixel unit 301, a nozzle closest to the current nozzle to be ejected is selected as a nozzle to be ejected later among a plurality of nozzles having the same actual ink ejection volume. When a plurality of nozzles having the same actual ink ejection volume are present in selecting the nozzles to be ejected, the nozzle closest to the current nozzle to be ejected is selected as the nozzle to be ejected later, which can reduce the stroke of the ink filling member 503 in the ink ejection process and improve the ink ejection efficiency.
Referring to fig. 3 again, the actual ink ejection volumes of the first nozzle 101, the second nozzle 102, the third nozzle 103, the fourth nozzle 104, the fifth nozzle 105 and the sixth nozzle 106 for single ink ejection are respectively denoted as V1＝10.1pL、V2＝10.2pL、V3＝10.1pL、V4＝9.9pL、V5＝9.9pL、V69.8 pL. After the first nozzle 101 there are two rear-to-be inkjet nozzles that meet the requirements, namely a fourth nozzle 104 and a fifth nozzle 105. At this time, when the first nozzle 101 is the current nozzle to be ejected, the fourth nozzle 104 closer to the first nozzle 101 is selected as the nozzle to be ejected later.
In another preferred example, when a plurality of nozzles to be ejected are selected according to the ink demand volume to sequentially eject ink to the pixel unit, if the sum of the actual ink ejection volumes of a plurality of groups of nozzles is equal to the ink demand volume of the pixel unit, a group of nozzles with the smallest sum of the distances between the nozzles is selected to eject ink to the pixel unit. Such as (V)1+V5)＝(V2+V6)＝(V3+V4) When the three groups of nozzles meet the printing requirement, the group of nozzles with the smallest sum of the distances among the nozzles is selected to jet ink to the pixel unit, namely, the third nozzle 103 and the fourth nozzle 104 are selected to jet ink to the pixel unit.
Referring to fig. 4, an embodiment of the present invention provides an inkjet printing control method, including the following steps:
s101: the theoretical ink ejection volume for a single ejection of ink from each nozzle on the inkjet printhead 100 is obtained. The theoretical ink ejection volume of a single ink ejection from each nozzle refers to the ink demand volume of the pixel unit 301 divided by the number of times of ink ejection when ink is ejected multiple times. In this embodiment, the theoretical ink ejection volume is 10pL, the ink requirement volume of the pixel unit 301 is 20pL, and the number of ink ejections is 2.
S102: and setting a preset ink-jet volume range according to the theoretical ink-jet volume, wherein the upper limit of the preset ink-jet volume range is larger than the theoretical ink-jet volume, and the lower limit of the preset ink-jet volume range is smaller than the theoretical ink-jet volume. The upper limit of the preset ink ejection volume range in this embodiment is 102.5% of the theoretical ink ejection volume, and the lower limit of the preset ink ejection volume range is 97.5% of the theoretical ink ejection volume.
S103: the actual ink ejection volume for a single ejection of ink from each nozzle on the inkjet printhead 100 in the ink ejection experiment was obtained. An ink ejection experiment is performed before ink ejection printing, and the actual ink ejection volume of each nozzle on the ink jet print head 100 ejected ink in a single time is obtained.
S104: the ink demand volume for the pixel cell 301 is obtained. The ink demand volume of the pixel unit 301 in this embodiment is 20 pL.
S105: selecting a plurality of nozzles to be jetted according to the ink required volume to jet ink to the pixel unit 301 in sequence; the actual ink-jet volume of each nozzle of the pixel unit 301 does not exceed the preset ink-jet volume range, the actual ink-jet volume of at least one nozzle is smaller than the theoretical ink-jet volume, the actual ink-jet volume of at least one nozzle is larger than the theoretical ink-jet volume, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit 301 is equal to the ink requirement volume of the pixel unit. When ink is jetted, a nozzle closest to a current nozzle to be jetted is selected as a nozzle to be jetted next from a plurality of nozzles with the same actual ink jetting volume.
Further, referring to fig. 5, another embodiment of the present invention provides an inkjet printing control method, including the following steps:
s201: the theoretical ink ejection volume for a single ejection of ink from each nozzle on the inkjet printhead 100 is obtained. The theoretical ink ejection volume of a single ink ejection from each nozzle refers to the ink demand volume of the pixel unit 301 divided by the number of times of ink ejection when ink is ejected multiple times. In this embodiment, the theoretical ink ejection volume is 10pL, the ink requirement volume of the pixel unit 301 is 20pL, and the number of ink ejections is 2.
S202: and setting a preset ink-jet volume range according to the theoretical ink-jet volume, wherein the upper limit of the preset ink-jet volume range is larger than the theoretical ink-jet volume, and the lower limit of the preset ink-jet volume range is smaller than the theoretical ink-jet volume. The upper limit of the preset ink ejection volume range in this embodiment is 102.5% of the theoretical ink ejection volume, and the lower limit of the preset ink ejection volume range is 97.5% of the theoretical ink ejection volume.
S203: the actual ink ejection volume for a single ejection of ink from each nozzle on the inkjet printhead 100 in the ink ejection experiment was obtained. An ink ejection experiment is performed before ink ejection printing, and the actual ink ejection volume of each nozzle on the ink jet print head 100 ejected ink in a single time is obtained.
S204: and correcting the nozzles with the actual ink jet volume exceeding the preset ink jet volume range according to the preset ink jet volume range. The nozzles whose actual ink ejection volumes exceeded the preset ink ejection volume range in the ink ejection experiment were corrected so that their actual ink ejection volumes were within the preset ink ejection volume range.
S205: the ink demand volume for the pixel cell 301 is obtained. The ink demand volume of the pixel unit 301 in this embodiment is 20 pL.
S206: and acquiring the multiple of the required ink volume and the theoretical ink-jet volume. In this embodiment, the multiple of the ink volume requirement and the theoretical ink ejection volume is 2, so that 2 nozzles are selected to sequentially eject ink to the pixel unit 301.
S207: selecting a plurality of nozzles to be jetted according to the ink required volume to jet ink to the pixel unit 301 in sequence; the actual ink-jet volume of each nozzle of the pixel unit 301 does not exceed the preset ink-jet volume range, the actual ink-jet volume of at least one nozzle is smaller than the theoretical ink-jet volume, the actual ink-jet volume of at least one nozzle is larger than the theoretical ink-jet volume, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit 301 is equal to the ink requirement volume of the pixel unit. When ink is jetted, a nozzle closest to a current nozzle to be jetted is selected as a nozzle to be jetted next from a plurality of nozzles with the same actual ink jetting volume.
The invention also provides an ink-jet printing control device, which comprises an actual ink-jet volume acquisition module, an ink demand volume acquisition module and an ink-jet printing control module; the actual ink-jet volume acquisition module is used for acquiring the actual ink-jet volume of single ink-jet of each nozzle on the ink-jet printing head in the ink-jet experiment; the ink demand volume acquisition module is used for acquiring the ink demand volume of the pixel unit; the ink jet printing control module is used for selecting a plurality of nozzles to be jetted according to the ink required volume to jet ink to the pixel units in sequence; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit.
Further, referring to fig. 6, another embodiment of the present invention provides an inkjet printing control apparatus, which includes a theoretical inkjet volume obtaining module 600, a preset inkjet volume range setting module 601, an actual inkjet volume obtaining module 602, an ink demand volume obtaining module 604, and an inkjet printing control module 606.
The theoretical ink-jet volume acquiring module 600 is used for acquiring the theoretical ink-jet volume of each nozzle on the ink-jet printing head 100 for jetting ink once; the preset ink-jet volume range setting module 601 is used for setting a preset ink-jet volume range according to a theoretical ink-jet volume, wherein the upper limit of the preset ink-jet volume range is larger than the theoretical ink-jet volume, and the lower limit of the preset ink-jet volume range is smaller than the theoretical ink-jet volume; the actual ink ejection volume acquiring module 602 is configured to acquire an actual ink ejection volume of a single ink ejection from each nozzle on the inkjet print head 100 in the ink ejection experiment; the ink demand volume acquiring module 604 is used for acquiring the ink demand volume of the pixel unit 301; the inkjet printing control module 606 is configured to select a plurality of nozzles to be inkjet according to the ink demand volume to sequentially inkjet the pixel unit 301; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit.
Further, the inkjet printing control module 606 is configured to select a plurality of nozzles to be inkjet according to the required ink volume to sequentially inkjet the pixel unit 301, where an actual inkjet volume of each nozzle of the pixel unit does not exceed a preset inkjet volume range, an actual inkjet volume of at least one nozzle is smaller than a theoretical inkjet volume, an actual inkjet volume of at least one nozzle is larger than the theoretical inkjet volume, and a sum of the actual inkjet volumes of the plurality of nozzles of the pixel unit is equal to the required ink volume of the pixel unit.
Further, the inkjet printing control apparatus further includes a nozzle correction module 603; the nozzle correction module 603 is configured to correct a nozzle whose actual inkjet volume exceeds a preset inkjet volume range in an inkjet experiment before selecting a plurality of nozzles to be inkjet according to an ink demand volume to sequentially inkjet the pixel unit, so that the actual inkjet volume is within the preset inkjet volume range.
Further, the inkjet printing control apparatus further includes a multiple acquisition module 605; the multiple obtaining module 605 is configured to obtain a multiple of an ink demand volume and a theoretical ink jetting volume before selecting a plurality of nozzles to be jetted according to the ink demand volume to sequentially jet ink to the pixel unit; when a plurality of nozzles to be jetted ink are selected according to the ink required volume to jet ink to the pixel units in sequence, the number of the nozzles to be jetted ink is equal to the multiple.
Furthermore, the ink jet printing control module is used for selecting a plurality of nozzles to be jetted according to the ink requirement volume to jet ink to the pixel unit in sequence, and selecting the nozzle which is closest to the current nozzle to be jetted from the plurality of nozzles with the same actual ink jetting volume as the nozzle to be jetted at the next time. Or when the ink jet printing control module is used for selecting a plurality of nozzles to be jetted according to the ink requirement volume to jet ink to the pixel unit in sequence, and when the sum of the actual ink jet volumes of a plurality of groups of nozzles is equal to the ink requirement volume of the pixel unit, selecting a group of nozzles with the minimum sum of the distances among the nozzles to jet ink to the pixel unit.
Yet another embodiment of the present invention provides an inkjet printing system including an inkjet printhead 100 and a controller 500. The inkjet printhead 100 is used to perform inkjet printing on a substrate; the controller 500 is used for acquiring the actual ink jetting volume of single ink jetting of each nozzle on the ink jet printing head in the ink jetting experiment; the controller 500 is further configured to obtain an ink demand volume of the pixel unit; the controller 500 is further configured to select a plurality of nozzles to be ejected according to the ink demand volume to sequentially eject ink to the pixel unit; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit.
Yet another embodiment of the present invention provides an inkjet printing system including an inkjet printhead 100 and a controller 500. The inkjet printhead 100 is used to perform inkjet printing on a substrate 300.
The controller 500 is used for acquiring a theoretical ink jetting volume of single ink jetting of each nozzle on the ink jet printing head 100; the controller 500 is further configured to set a preset ink ejection volume range according to the theoretical ink ejection volume, an upper limit of the preset ink ejection volume range being greater than the theoretical ink ejection volume, and a lower limit of the preset ink ejection volume range being less than the theoretical ink ejection volume; the controller 500 is further configured to obtain an actual ink ejection volume for a single ink ejection from each nozzle on the inkjet printhead 100 in the ink ejection experiment; the controller 500 is further configured to obtain an ink demand volume for the pixel unit 301; the controller 500 is further configured to select a plurality of nozzles to be ejected according to the ink demand volume to sequentially eject ink to the pixel unit 301; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit.
In a specific example, the controller 500 is configured to select a plurality of nozzles to be ejected according to an ink demand volume to sequentially eject ink to the pixel unit 301, an actual ink ejection volume for each nozzle of the pixel unit does not exceed a preset ink ejection volume range, an actual ink ejection volume of at least one nozzle is smaller than a theoretical ink ejection volume, an actual ink ejection volume of at least one nozzle is larger than the theoretical ink ejection volume, and a sum of the actual ink ejection volumes for the plurality of nozzles of the pixel unit is equal to the ink demand volume of the pixel unit.
In a specific example, the controller 500 is further configured to correct the nozzles having the actual ink ejection volume exceeding the preset ink ejection volume range in the ink ejection experiment before selecting a plurality of nozzles to be ejected according to the ink demand volume to sequentially eject ink to the pixel unit, so that the actual ink ejection volume is within the preset ink ejection volume range.
In another specific example, the controller 500 is further configured to obtain a multiple of the ink demand volume and the theoretical ink ejection volume before selecting a plurality of nozzles to be ejected according to the ink demand volume to sequentially eject ink to the pixel unit; when a plurality of nozzles to be jetted ink are selected according to the ink required volume to jet ink to the pixel units in sequence, the number of the nozzles to be jetted ink is equal to the multiple.
Further, the controller 500 is configured to select a plurality of nozzles to be ejected according to the ink demand volume to sequentially eject ink to the pixel unit, and select a nozzle closest to a nozzle to be ejected currently among a plurality of nozzles having an actual ink ejection volume equal to each other as a nozzle to be ejected later. Or, when the controller 500 is configured to select a plurality of nozzles to be ejected according to the ink demand volume to sequentially eject ink to the pixel unit, and when the sum of the actual ink ejection volumes of the plurality of groups of nozzles is equal to the ink demand volume of the pixel unit, the group of nozzles with the smallest sum of the distances between the nozzles is selected to eject ink to the pixel unit.
Referring to fig. 7, in one specific example, an inkjet printing system includes an ink fill component 503, an image capture device 504, and a substrate holder 505. An ink filling member 503 is mounted on a beam 502 and moves in a moving direction 501, and an image pickup device 504 is mounted at the bottom of the ink filling member 503 for picking up and recording the ink ejection condition of the pixel unit 301 of the substrate 300. The inkjet print head 100 is disposed in the ink filling member 503, and moves with the ink filling member 503 to inject ink into the corresponding pixel unit 301. During the inkjet printing process, the substrate 300 is placed on the substrate holder 505, a negative pressure is formed by vacuum adsorption 506, and a nitrogen gas 507 protective atmosphere is established to improve the stability and accuracy of inkjet printing.
Yet another embodiment of the present invention provides a computer apparatus including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the inkjet printing control method when executing the computer program.
When the processor of the computer device executes the program, the above ink-jet printing control method is realized, and the above ink-jet printing control method is realized, so that the pixel unit 301 is sequentially subjected to ink jet by selecting a plurality of nozzles to be subjected to ink jet according to the ink required volume; the actual ink-jet volume of each nozzle of the pixel unit 301 does not exceed the preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit 301 is equal to the ink required volume of the pixel unit, so that the ink volume difference in the pixel unit 301 can be effectively reduced, and the film-forming uniformity is improved.
Yet another embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-described inkjet printing control method.
The above-described computer-readable storage medium, on which the computer program is stored, which, when executed by the processor, sequentially ejects ink to the pixel unit 301 by selecting a plurality of nozzles to be ejected according to the ink demand volume by implementing the above-described ink ejection control method; the actual ink-jet volume of each nozzle of the pixel unit 301 does not exceed the preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit 301 is equal to the ink required volume of the pixel unit, so that the ink volume difference in the pixel unit 301 can be effectively reduced, and the film-forming uniformity is improved.
It is understood that, as one of ordinary skill in the art will appreciate, all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer readable storage medium, and when executed, the computer program can include the processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. An ink jet printing control method, comprising the steps of:
acquiring the actual ink-jet volume of single ink-jet of each nozzle on the ink-jet printing head in an ink-jet experiment;
acquiring the ink required volume of a pixel unit;
selecting a plurality of nozzles to be jetted according to the ink required volume to jet ink to the pixel units in sequence; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit.
2. The inkjet printing control method according to claim 1, further comprising, before acquiring an actual ejection volume of a single ejection of ink from each nozzle on the inkjet printhead in the ejection experiment, the steps of:
acquiring the theoretical ink-jet volume of each nozzle on the ink-jet printing head for single ink-jet;
and setting a preset ink-jet volume range according to the theoretical ink-jet volume, wherein the upper limit of the preset ink-jet volume range is larger than the theoretical ink-jet volume, and the lower limit of the preset ink-jet volume range is smaller than the theoretical ink-jet volume.
3. The inkjet printing control method according to claim 2, wherein an upper limit of the preset ejection volume range is not more than 102.5% of the theoretical ejection volume, and a lower limit of the preset ejection volume range is not less than 97.5% of the theoretical ejection volume.
4. The inkjet printing control method according to claim 2, wherein when a plurality of nozzles to be ejected are selected according to the ink demand volume to sequentially eject ink to the pixel unit, an actual ejection volume of at least one nozzle is smaller than the theoretical ejection volume, and an actual ejection volume of at least one nozzle is larger than the theoretical ejection volume.
5. The inkjet printing control method according to claim 2, further comprising, before selecting a plurality of nozzles to be ejected according to the ink demand volume to sequentially eject ink to the pixel unit, the steps of:
obtaining the multiple of the ink demand volume and the theoretical ink-jet volume; and when a plurality of nozzles to be jetted are selected according to the ink required volume to jet ink to the pixel unit in sequence, the number of the plurality of nozzles to be jetted is equal to the multiple.
6. The inkjet printing control method according to claim 1, further comprising, before selecting a plurality of nozzles to be ejected according to the ink demand volume to sequentially eject ink to the pixel unit, the steps of:
and correcting the nozzles with the actual ink jetting volume exceeding the preset ink jetting volume range in the ink jetting experiment so as to enable the actual ink jetting volume to be within the preset ink jetting volume range.
7. The inkjet printing control method according to any one of claims 1 to 6, wherein when a plurality of nozzles to be ejected are selected according to the ink demand volume to sequentially eject ink to the pixel unit, a nozzle closest to a nozzle to be currently ejected is selected as a nozzle to be ejected later among a plurality of nozzles having an actual ink ejection volume equal to each other.
8. The inkjet printing control method according to any one of claims 1 to 6, wherein when a plurality of nozzles to be ejected are selected according to the ink demand volume to sequentially eject ink to the pixel unit, when the sum of actual ejection volumes of a plurality of groups of nozzles is equal to the ink demand volume of the pixel unit, a group of nozzles having the smallest sum of distances between the nozzles is selected to eject ink to the pixel unit.
9. An ink-jet printing control device is characterized by comprising an actual ink-jet volume acquisition module, an ink required volume acquisition module and an ink-jet printing control module;
the actual ink-jet volume acquisition module is used for acquiring the actual ink-jet volume of single ink-jet of each nozzle on the ink-jet printing head in an ink-jet experiment;
the ink required volume acquisition module is used for acquiring the ink required volume of the pixel unit;
the ink-jet printing control module is used for selecting a plurality of nozzles to be subjected to ink jet according to the ink required volume to sequentially jet ink to the pixel units; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit.
10. An inkjet printing system comprising an inkjet printhead and a controller;
the ink-jet printing head is used for carrying out ink-jet printing on the substrate;
the controller is used for acquiring the actual ink jetting volume of single ink jetting of each nozzle on the ink jet printing head in an ink jetting experiment;
the controller is further used for acquiring the ink required volume of the pixel unit;
the controller is also used for selecting a plurality of nozzles to be jetted according to the ink required volume to jet ink to the pixel units in sequence; the actual ink-jet volume of each nozzle of the pixel unit does not exceed a preset ink-jet volume range, and the sum of the actual ink-jet volumes of the nozzles of the pixel unit is equal to the ink requirement volume of the pixel unit.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the inkjet printing control method according to any one of claims 1 to 8.
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