CN115366539B - Ink jet printing compensation method and ink jet printing control method - Google Patents
Ink jet printing compensation method and ink jet printing control method Download PDFInfo
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- CN115366539B CN115366539B CN202111115052.XA CN202111115052A CN115366539B CN 115366539 B CN115366539 B CN 115366539B CN 202111115052 A CN202111115052 A CN 202111115052A CN 115366539 B CN115366539 B CN 115366539B
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- 238000007641 inkjet printing Methods 0.000 title claims abstract description 52
- 238000007639 printing Methods 0.000 claims abstract description 104
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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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04505—Control methods or devices therefor, e.g. driver circuits, control circuits aiming at correcting alignment
-
- 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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04535—Control methods or devices therefor, e.g. driver circuits, control circuits involving calculation of drop size, weight or volume
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- Ink Jet (AREA)
Abstract
The present invention relates to an inkjet printing compensation method and an inkjet printing control method. The method comprises the steps of pre-printing on a test substrate provided with a plurality of identification areas arranged in an array, wherein nozzles of a printing head are in one-to-one correspondence with the identification areas. And then acquiring the pre-printed ink drop information, and determining printing offset information according to the ink drop information and the ink drop target information. After the print offset information is determined, the print parameters of the nozzles are compensated according to the print offset information. The method can compensate the printing parameters of the nozzle, and further adopts the parameters after compensation to print, thereby improving the printing precision.
Description
Technical Field
The present invention relates to the field of inkjet printing technology, and in particular, to an inkjet printing compensation method and an inkjet printing control method.
Background
In recent years, inkjet printing technology has been widely used in the development of display devices such as Organic Light Emitting Diodes (OLED) and quantum dot light emitting diodes (QLED) because of its advantages such as high material utilization and production efficiency. In the process of ink-jet printing, functional material ink is mainly injected into a pixel unit through an ink-jet system to prepare a corresponding functional layer, such as a hole injection layer, a hole transport layer, a luminescent layer material, an electron injection layer, an electron transport layer and the like. With the progress of printing, the problem that deviation of printing parameters of nozzles occurs inevitably, which easily results in reduction of printing accuracy and further reduction of yield of devices.
Disclosure of Invention
Based on this, it is necessary to provide a method capable of compensating printing parameters of nozzles, by which the printing parameters can be compensated, thereby improving printing accuracy.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an inkjet printing compensation method comprising the steps of:
providing a test substrate, wherein a plurality of identification areas arranged in an array are arranged on the test substrate;
pre-printing the test substrate, wherein the nozzles of the printing head are in one-to-one correspondence with the identification areas;
acquiring the pre-printed ink drop information;
determining printing offset information according to the ink drop information and the ink drop target information;
and compensating the printing parameters of the nozzles according to the printing offset information.
In one embodiment, the ink droplet information includes an actual ink droplet position, the ink droplet target information includes an ink droplet target position, and determining the printing offset information according to the ink droplet information and the target position information includes:
acquiring a displacement difference s between the actual position of the ink drop and the target position of the ink drop;
determining a differential time T of the nozzle ink ejection based on the displacement difference s and the printing speed v of the pre-printing in the printing direction a 。
In one embodiment, the printing parameters include an inkjet start interval time, and the compensating the printing parameters of the nozzles according to the printing offset information includes the steps of:
according to the differential time T a Determining a compensating ink jet start interval time T of the nozzle ink jet with a preset ink jet start interval time of the nozzle ink jet 1 。
In one embodiment, acquiring the displacement difference s between the actual ink droplet position and the target ink droplet position includes the steps of:
acquiring an offset L between the actual position of the ink drop and the central position of a marking area corresponding to the ink drop; and determining the displacement difference s according to the offset L and the included angle between the printing direction and the offset direction of the offset.
In one embodiment, the differential time T of the nozzle ink ejection is determined a Before, the method further comprises the following steps:
and closing the nozzle of which the absolute value of the displacement difference s is larger than the absolute value of the preset displacement difference.
In one embodiment, the ink droplet information includes a projected area of each ink droplet on the test substrate, the ink droplet target information includes a nozzle ink ejection voltage corresponding to each ink droplet, the print offset information includes a compensation ink ejection voltage, and determining the print offset information according to the ink droplet information and the target position information includes:
establishing a corresponding relation between a projection area corresponding to each ink drop and a nozzle ink-jet voltage corresponding to each ink drop;
acquiring an average value of projection areas corresponding to the ink drops;
and determining the compensation ink-jet voltage corresponding to the average value according to the average value and the corresponding relation between the projection area corresponding to each ink drop and the nozzle ink-jet voltage corresponding to each ink drop.
In one embodiment, the printing parameters include actual ink ejection voltage of the nozzles, and the compensating the printing parameters of the nozzles according to the printing offset information includes the following steps:
and taking the compensated ink jet voltage as the actual ink jet voltage of the nozzle.
In one embodiment, after acquiring the pre-printed ink droplet information, the method further comprises the steps of:
and determining the actual volume of each ink drop according to the projection area of each ink drop on the test substrate and the contact angle of each ink drop.
In one embodiment, after determining the actual volume of each of the ink droplets, the method further comprises the steps of:
and comparing the variation amplitude between the actual volume and the ideal volume of each ink drop, and closing the nozzle corresponding to the ink drop with the absolute value of the variation amplitude larger than the preset variation amplitude threshold value.
In one embodiment, the surface of the identification area is sequentially covered with a light reflection enhancing layer and a hydrophobic layer.
An inkjet printing control method, comprising the steps of:
compensating for print parameters of each nozzle according to the inkjet printing compensation method described in any of the embodiments above;
and controlling each nozzle to jet ink according to the compensated printing parameters.
In one embodiment, the printing parameters are the ink ejection initiation interval time and/or the actual ink ejection voltage of the nozzles.
According to the ink-jet printing compensation method, the test substrate provided with the plurality of marking areas arranged in the array is subjected to pre-printing, and the nozzles of the printing head are in one-to-one correspondence with the marking areas. And then acquiring the pre-printed ink drop information, and determining printing offset information according to the ink drop information and the ink drop target information. After the print offset information is determined, the print parameters of the nozzles are compensated according to the print offset information. The method can compensate the printing parameters of the nozzle, and further adopts the parameters after compensation to print, thereby improving the printing precision.
Drawings
FIG. 1 is a flow chart of an inkjet compensation method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a test substrate according to an embodiment of the invention;
FIG. 3 is a top view of the test substrate corresponding to FIG. 2;
FIG. 4 is a schematic diagram of an inkjet printing control apparatus and use thereof according to an embodiment of the present invention;
fig. 5 is a diagram showing a comparison of actual drop positions of ink drops formed by printing by the ink jet printing control method and those of ink drops formed by the conventional printing method according to an embodiment of the present invention.
The figure indicates:
100. testing the substrate; 101. a test substrate body; 102. a light reflection enhancing layer; 103. a hydrophobic layer; 200. an inkjet printing control device; 201. a print head; 202. an ink path circulation system 203, a scanning probe; 204. a controller; 300. a work table; 400. a substrate.
Detailed Description
The following detailed description of the present invention will provide further details in order to make the above-mentioned objects, features and advantages of the present invention more comprehensible. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
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 herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides an inkjet printing compensation method. The compensation method comprises the following steps:
s101: providing a test substrate, wherein a plurality of identification areas arranged in an array are arranged on the test substrate.
S102: and pre-printing the test substrate, wherein the nozzles of the printing head are in one-to-one correspondence with the identification areas.
S103: pre-printed ink drop information is acquired.
S104: print offset information is determined based on the ink droplet information and the ink droplet target information.
S105: and compensating the printing parameters of the nozzles according to the printing offset information.
It is understood that the printing substrate has a plurality of pixel units distributed in an array. In the inkjet printing process, nozzles are typically mounted on a print head, and then a print substrate and the print head are moved in different directions, respectively, to print pixel units on the print substrate. In the compensation method in this embodiment, the test substrate provided with the plurality of identification areas arranged in an array is pre-printed, wherein the nozzles of the print head are in one-to-one correspondence with the identification areas. And then acquiring the pre-printed ink drop information, and determining printing offset information according to the ink drop information and the ink drop target information. After the print offset information is determined, the print parameters of the nozzles are compensated according to the print offset information. The method can compensate the printing parameters of the nozzle, and further adopts the parameters after compensation to print, thereby improving the printing precision.
In a specific example, the ink droplet information includes an actual ink droplet position, the ink droplet target information includes an ink droplet target position, and determining printing offset information based on the ink droplet information and the target position information includes:
acquiring a displacement difference s between the actual position of the ink drop and the target position of the ink drop;
determining a differential time T of nozzle ink ejection based on the displacement difference s and the printing speed v of the pre-printing in the printing direction a . For example T a ＝s/v。
Further, the printing parameters include an inkjet start interval time, and the printing parameters of the nozzles are compensated according to the printing offset information, including the following steps:
according to the difference time T a Determining a compensating ink jet start interval time T of the nozzle ink jet with a preset ink jet start interval time of the nozzle ink jet 1 。
Specifically, as one illustration, a preset ink ejection start interval time of the nozzle ejection is denoted as T 0 According to the difference time T a Determining a compensating ink jet start interval time T of the nozzle ink jet with a preset ink jet start interval time of the nozzle ink jet 1 Wherein T is 1 ＝T 0 +T a 。
In a specific example, the displacement difference s of the actual position of the ink droplet from the target position of the ink droplet is obtained, comprising the steps of:
acquiring an offset L between the actual position of the ink drop and the central position of the identification area corresponding to the ink drop; and determining the displacement difference s according to the offset L and the included angle between the printing direction and the offset direction of the offset.
It will be appreciated that the offset direction of the offset L indicates the direction in which the central position of the identification zone points to the actual position of the ink drop. At this time, the center position of the identification area corresponding to the ink drop is taken as the target position of the ink drop. Specifically, when the displacement difference s is determined according to the offset L, the angle between the printing direction and the offset direction of the offset, s=l×cos α, and α represents the angle between the printing direction and the offset direction of the offset.
In a specific example, a differential time T of nozzle inkjetting is determined a Before, the method further comprises the following steps: and closing the nozzle with the absolute value of the displacement difference s larger than the absolute value of the preset displacement difference. Alternatively, the preset displacement difference absolute value is less than or equal to 50 μm. Preferably, the absolute value of the preset displacement difference is less than or equal to 20 μm.
Further, after the nozzle with the absolute value of the displacement difference s larger than the absolute value of the preset displacement difference is closed, the nozzle closest to the nozzle is called to jet ink in the ink jet area of the nozzle.
It will be appreciated that it is preferable to pause the inkjet printing when the nozzle is invoked. After the nozzle nearest to the closed nozzle is called to correspond to the ink ejection area of the nozzle, ink ejection printing is restarted.
In a specific example, the ink droplet information includes a projected area of each ink droplet on the test substrate, the ink droplet target information includes a nozzle ejection voltage corresponding to each ink droplet, the print offset information includes a compensation ejection voltage, and the determining the print offset information based on the ink droplet information and the target position information includes:
establishing a corresponding relation between a projection area corresponding to each ink drop and a nozzle ink-jet voltage corresponding to each ink drop;
acquiring an average value of projection areas corresponding to the ink drops;
and determining the compensation ink-jet voltage corresponding to the average value according to the average value and the corresponding relation between the projection area corresponding to each ink drop and the nozzle ink-jet voltage corresponding to each ink drop.
It will be appreciated that in this example, acquiring the pre-printed ink drop information includes acquiring the projected area of ink drops ejected from each nozzle onto the test substrate and the nozzle ejection voltage.
Alternatively, when the projected area of the ink droplets ejected from each nozzle onto the test substrate is acquired, the projected area of the ink droplets ejected from each nozzle onto the test substrate may be acquired by the scanning probe. Specifically, the projected area of the ink droplet on the test substrate is obtained by installing a scanning probe directly above the test substrate.
Further, the inventors found in experiments that there is a linear relationship between the projected area and the inkjet voltage. The inkjet voltage corresponding to the average value of each projection area is adopted to enable each nozzle to jet ink, so that the difference of the inkjet quantity of the nozzles is reduced, and the accuracy of calculating the starting point of the inkjet time is improved.
In a specific example, the printing parameters include the actual inkjet voltage of the nozzles, and the printing parameters of the nozzles are compensated according to the printing offset information, including the steps of: the compensated ink ejection voltage is used as the actual ink ejection voltage of the nozzle.
Optionally, after acquiring the pre-printed ink droplet information, the method further comprises the following steps: the actual volume of each ink drop is determined according to the projected area of each ink drop on the test substrate and the contact angle of each ink drop. The shape of the ink drop on the test substrate is spherical crown shape, and the actual volume of the ink drop can be calculated through the projection area of each ink drop on the test substrate and the contact angle of each ink drop. It will be appreciated that the magnitude of the contact angle can be measured using a contact angle measuring instrument.
Further, after determining the actual volume of each ink droplet, the method further comprises the steps of: and comparing the variation amplitude between the actual volume and the ideal volume of each ink drop, and closing the nozzle corresponding to the ink drop with the absolute value of the variation amplitude larger than the preset variation amplitude threshold value. Optionally, the preset variation amplitude threshold is less than or equal to 5%.
Further, after the nozzle with the absolute value of the variation amplitude larger than the preset variation amplitude threshold is closed, the nozzle closest to the nozzle is called to jet ink on the ink jet area of the nozzle.
In a specific example, before acquiring the pre-printed ink droplet information, the method further includes the steps of: and monitoring the shape of the ink drops on the test substrate, and closing the nozzles corresponding to the ink drops with abnormal shapes. Alternatively, the shape anomaly is no ink droplet or the ink droplet is dispersed in a plurality. The abnormal ink drop shape indicates that a certain abnormality occurs in the corresponding nozzle, such as nozzle blockage. In this case, the nozzle needs to be adjusted to a certain degree. For example, after the nozzle corresponding to the ink droplet having the abnormal shape is closed, the nozzle closest to the nozzle is called to eject ink to the ink ejection area of the nozzle.
It will be appreciated that the above-described compensation method may be repeated a number of times to adjust the actual drop position of the ink drop and/or the actual volume of the ink drop to the desired position and volume.
Still another embodiment of the present invention provides an inkjet printing compensation apparatus. The ink-jet printing compensation device comprises a preprinting module, a data acquisition module, an offset information determination module and a compensation module.
Specifically, the pre-printing module is used for pre-printing the test substrate, wherein a plurality of identification areas are arranged on the test substrate in an array manner, and nozzles of the printing head are in one-to-one correspondence with the identification areas. The data acquisition module is used for acquiring the pre-printed ink drop information. The offset information determining module is used for determining printing offset information according to the ink drop information and the ink drop target information. The compensation module is used for compensating the printing parameters of the nozzles according to the printing offset information.
Still another embodiment of the present invention provides an inkjet printing compensation system. The inkjet printing compensation system includes a printhead and a controller.
Specifically, nozzles are provided on the print head for ink jet printing on the substrate. The controller is used for preprinting the test substrate, wherein, a plurality of identification areas arranged in an array are arranged on the test substrate, and the nozzles of the printing head are in one-to-one correspondence with the identification areas. The controller is also configured to obtain pre-printed ink drop information. The controller is further configured to determine print offset information based on the ink drop information and the ink drop target information. The controller is also configured to compensate for printing parameters of the nozzles based on the printing offset information.
Referring to fig. 2 and 3, the surface of the identification area is covered with a reflection enhancing layer 102 and a hydrophobic layer 103 in sequence.
Specifically, the test substrate 100 includes a test substrate body 101, a reflection enhancing layer 102, and a hydrophobic layer 103, which are sequentially stacked.
Further, the reflection enhancing layer 102 is arranged to be beneficial to accurately acquiring information such as the shape, the coordinates and the like of the ink drop in the identification area through a scanning probe and other devices. Further, the material of the reflection enhancing layer 102 is a reflective metal. Specifically, the reflective metal is at least one of Mg, al, ca, fe, co, ni, zn, ag and Sn. It is understood that when the reflective metal is a plurality of the metals Mg, al, ca, fe, co, ni, zn, ag and Sn, the reflective metal may be a mixture of the metals or an alloy of the metal elements.
Further, the surface of the reflection enhancing layer 102 is covered with a hydrophobic layer 103. The arrangement of the hydrophobic layer is beneficial to enabling the ink drop to form a more stable spherical cap shape, and improves the accuracy of the tests such as the projection area of the ink drop on the test substrate, the volume of the ink drop and the like. Specifically, the hydrophobic layer is made of at least one of polyamine, polyamide, polyimide, phenolic resin, polyurethane and polysilane.
Still further, the test substrate 100 has a marking area thereon, and the marking area is located on the surface of the test substrate body 101. The reflection enhancing layer 102 has a shape matching with the arrayed identification areas, the surface of the identification areas is covered with the reflection enhancing layer, and gaps between the identification areas are exposed. Further, the hydrophobic layer 103 is located on the surface of the reflection enhancing layer away from the test substrate body 101. Still further, in preparing the hydrophobic layer 103, the gaps between the reflection enhancing layers may be filled with the material of the hydrophobic layer. It will be appreciated that during use of the test substrate, the ink droplets ejected from the nozzles are located on the surface of the hydrophobic layer 103 and on the surface corresponding to the light reflection enhancing layer 102.
Referring again to fig. 3, in this example, the identification area is square in shape. Of course, the shape of the identification zone may also be other shapes, such as circular, rectangular, oval, etc. The design may be performed according to the shape of the pixel units of the printing substrate and/or the arrangement of the nozzles on the printhead during the design process. Preferably, the shape of the identification area is the same as the shape of the pixel unit. Further, the identification areas are arranged in the same manner as the nozzles on the print head. The number of identification zones is greater than or equal to the number of nozzles. It will be appreciated that in fig. 3, there is a gap between the identification zones.
In a specific example, in the array arrangement, the center distance between adjacent identification areas in the identification area of the same row is equal to the distance between ink outlets of adjacent nozzles in the nozzle of the same row; or the center distance between adjacent marking areas in the marking areas of the same column is equal to the distance between ink outlets of adjacent nozzles in the nozzles of the same column. In the design of an actual print head, a plurality of nozzles are arranged on the print head, and the plurality of nozzles are distributed in a single row, or the plurality of nozzles are distributed in a single column, or the plurality of nozzles are distributed in an array of a plurality of rows and a plurality of columns. The distance between the centers of the adjacent marking areas and the distance between the nozzles are adaptively set, so that the actual ink-jet time starting points of the nozzles can be synchronously calculated.
Further, in the array arrangement, the spacing distance between adjacent ones of the identification areas in the same row is 1 μm to 50 μm, preferably 10 μm to 20 μm; or the spacing distance between adjacent marking areas in the same column is 1 μm to 50 μm, preferably 10 μm to 20 μm. It will be appreciated that the spacing of adjacent identification zones in the same row may be, but is not limited to, 1 μm, 5 μm, 8 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm or 50 μm. The spacing distance of adjacent logo regions in a logo region of the same column may be, but is not limited to, 1 μm, 5 μm, 8 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm or 50 μm. It will also be appreciated that the separation distance of adjacent identification zones represents the distance between the edges of adjacent identification zones.
Referring to fig. 4, another embodiment of the present invention provides an inkjet printing control apparatus 200. The inkjet printing control apparatus 200 includes a printhead 201, an ink path circulation system 202, a scanning probe 203, and a controller 204. An ink path circulation system 202 is connected to nozzles on the printhead 201 for supplying ink to the nozzles. The scanning probe 203 is used to scan the shape of the ink droplet on the surface of the substrate 400 on the stage 300 and to acquire the projected area of the ink droplet on the test substrate. The controller 204 is configured to compensate for the printing parameters of each nozzle in accordance with the inkjet printing compensation method described above. The controller 204 is also configured to control the nozzles to eject ink according to the compensated printing parameters. It will be appreciated that the substrate on the table 300 is the test substrate when pre-printing and the substrate on the table 300 is the print substrate when printing is started.
Referring to fig. 5, in fig. 5, numerals 1 to 8 denote 8 nozzles numbered 1 to 8, respectively. During printing, the printing substrate reciprocates in the X-axis.
In the first line on the test substrate, the ink droplets obtained according to the conventional printing method exhibit a difference in size, and the landing positions of the ink droplets are shifted with respect to the center of the marking area, which tends to cause a decrease in printing accuracy.
In the third row of the test substrate, the actual drop positions of ink drops printed according to the ink jet printing control method in one embodiment of the present invention are shown. The ink jet printing control method comprises the following steps:
compensating the printing parameters of each nozzle according to the ink-jet printing compensation method; and controlling each nozzle to jet ink according to the compensated printing parameters.
The positions of the ink drops on the test substrate after ink ejection are shown in fig. 5 as the third row on the print substrate. It can be seen from this that, after printing in this embodiment, the uniformity of the projected area of the ink droplets on the test substrate is significantly improved, and the distance between the actual landing position of the ink droplets and the center position of the marking area is significantly reduced, as compared with the first-line conventional printing method. The print control method in this embodiment is shown to be capable of effectively improving print accuracy.
In one specific example, the printing parameters are the inkjet start interval time and/or the nozzle actual inkjet voltage.
Yet another embodiment of the present invention provides an inkjet printing control system. The inkjet printing control system includes a printhead and a controller. Wherein, be equipped with the nozzle on the print head for carrying out the inkjet printing to the base plate. The controller is used for compensating the printing parameters of each nozzle according to the ink-jet printing compensation method. The controller is also used for controlling each nozzle to jet ink according to the compensated printing parameters.
Still another embodiment of the present invention provides a computer-readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the inkjet printing compensation method described above or implements the steps of the inkjet printing control method described above.
It will be appreciated by those of ordinary skill in the art that implementing all or part of the processes of the methods of the embodiments described above may be accomplished by way of a computer program that instructs associated hardware to perform the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile 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), memory bus (Rambus) direct 20RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
Yet another embodiment of the present invention provides a computer device comprising a processor, a memory, a network interface, a display screen, and an input device coupled via a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores a program that is executed by the operating system and the computer. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program when executed by a processor implements one of the above inkjet printing compensation methods or inkjet printing control methods. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch control layer covered on the display screen, can also be a key, a track ball or a touch control plate arranged on the shell of the computer equipment, and can also be an external keyboard, a touch control plate or a mouse and the like.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. The scope of the invention is therefore intended to be covered by the appended claims, and the description and drawings may be interpreted in accordance with the contents of the claims.
Claims (11)
1. An inkjet printing compensation method, characterized by comprising the steps of:
providing a test substrate, wherein a plurality of identification areas arranged in an array are arranged on the test substrate;
pre-printing the test substrate, wherein the nozzles of the printing head are in one-to-one correspondence with the identification areas;
acquiring the pre-printed ink drop information;
determining printing offset information according to the ink drop information and the ink drop target information;
compensating the printing parameters of the nozzles according to the printing offset information;
the ink drop information includes a projection area of each ink drop on the test substrate, the ink drop target information includes a nozzle ink-jet voltage corresponding to each ink drop, the printing offset information includes a compensation ink-jet voltage, and the determining the printing offset information according to the ink drop information and the target position information includes:
establishing a corresponding relation between a projection area corresponding to each ink drop and a nozzle ink-jet voltage corresponding to each ink drop;
acquiring an average value of projection areas corresponding to the ink drops;
and determining the compensation ink-jet voltage corresponding to the average value according to the average value and the corresponding relation between the projection area corresponding to each ink drop and the nozzle ink-jet voltage corresponding to each ink drop.
2. The inkjet printing compensation method according to claim 1 wherein the ink droplet information further includes an actual ink droplet position, the ink droplet target information further includes an ink droplet target position, and the determining of the printing offset information based on the ink droplet information and the target position information includes:
acquiring a displacement difference s between the actual position of the ink drop and the target position of the ink drop;
determining a differential time T of the nozzle ink ejection based on the displacement difference s and the printing speed v of the pre-printing in the printing direction a 。
3. The inkjet printing compensation method according to claim 2 wherein the printing parameters include an inkjet start interval time, and wherein the compensating the printing parameters of the nozzles according to the printing offset information comprises the steps of:
according to the differential time T a Determining a compensating ink jet start interval time T of the nozzle ink jet with a preset ink jet start interval time of the nozzle ink jet 1 。
4. The inkjet printing compensation method according to any one of claims 2 to 3, wherein the step of obtaining the displacement difference s between the actual position of the ink droplet and the target position of the ink droplet includes the steps of:
acquiring an offset L between the actual position of the ink drop and the central position of a marking area corresponding to the ink drop; and determining the displacement difference s according to the offset L and the included angle between the printing direction and the offset direction of the offset L.
5. A method of compensating for inkjet printing according to any of claims 2 to 3 wherein the differential time T of the nozzle ejection is determined a Before, the method further comprises the following steps:
and closing the nozzle of which the absolute value of the displacement difference s is larger than the absolute value of the preset displacement difference.
6. The inkjet printing compensation method according to claim 1 wherein the printing parameters include actual inkjet voltage of nozzles, and wherein the compensating the printing parameters of the nozzles according to the printing offset information includes the steps of:
and taking the compensated ink jet voltage as the actual ink jet voltage of the nozzle.
7. The inkjet printing compensation method according to claim 1, further comprising the steps of, after acquiring the pre-printed ink droplet information:
and determining the actual volume of each ink drop according to the projection area of each ink drop on the test substrate and the contact angle of each ink drop.
8. The inkjet printing compensation method according to claim 7 further comprising the step of, after determining the actual volume of each of the ink drops:
and comparing the variation amplitude between the actual volume and the ideal volume of each ink drop, and closing the nozzle corresponding to the ink drop with the absolute value of the variation amplitude larger than the preset variation amplitude threshold value.
9. The ink jet printing compensation method of claim 1 wherein the surface of the identification zone is covered with a light reflection enhancing layer and a hydrophobic layer in sequence.
10. An inkjet printing control method, characterized by comprising the steps of:
the method for compensating for printing parameters of each nozzle according to any one of claims 1 to 9;
and controlling each nozzle to jet ink according to the compensated printing parameters.
11. Inkjet printing control method according to claim 10 wherein the printing parameters are inkjet start interval time and/or nozzle actual inkjet voltage.
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Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000146993A (en) * | 1998-11-16 | 2000-05-26 | Brother Ind Ltd | Method and apparatus for detection of moving object |
| JP2002103627A (en) * | 2000-09-29 | 2002-04-09 | Hitachi Koki Co Ltd | Multi-nozzle ink jet recorder |
| EP1428667A2 (en) * | 2002-12-11 | 2004-06-16 | Konica Minolta Holdings, Inc. | Ink jet printer and image recording method |
| CN2628263Y (en) * | 2003-05-27 | 2004-07-28 | 兄弟工业株式会社 | Ink-jet head for ink-jet printer |
| CN1593922A (en) * | 2000-06-30 | 2005-03-16 | 西尔弗布鲁克研究有限公司 | Image compensation method for ink-ejecting print |
| CN1597327A (en) * | 2003-06-27 | 2005-03-23 | 三星电子株式会社 | Method of determining missing nozzles in an inkjet printer |
| CN1868744A (en) * | 2005-05-25 | 2006-11-29 | 三星电子株式会社 | Ink-jet image forming apparatus and method for compensating for defective nozzle |
| CN101402282A (en) * | 2008-10-17 | 2009-04-08 | 北京大学 | Ink jet printer and printing method thereof |
| CN102649358A (en) * | 2011-02-24 | 2012-08-29 | 富士胶片株式会社 | Drive apparatus for liquid ejection head, liquid ejection apparatus and inkjet recording apparatus |
| CN107967126A (en) * | 2017-06-13 | 2018-04-27 | 广东聚华印刷显示技术有限公司 | Printhead automatic compensation method, apparatus, storage medium and its computer equipment |
| CN108928117A (en) * | 2017-11-21 | 2018-12-04 | 广东聚华印刷显示技术有限公司 | Bearing calibration out of ink, correction system and the inkjet-printing device of inkjet-printing device |
| CN108944047A (en) * | 2017-12-26 | 2018-12-07 | 广东聚华印刷显示技术有限公司 | Inkjet printing correction method, device, storage medium and computer equipment |
| CN108944048A (en) * | 2017-11-21 | 2018-12-07 | 广东聚华印刷显示技术有限公司 | Localization method, positioning system and the detection system of the nozzle of inkjet-printing device |
| CN109703197A (en) * | 2018-03-16 | 2019-05-03 | 广东聚华印刷显示技术有限公司 | Inkjet printing ink droplet eccentric traveling distance measuring method, device and measurement substrate |
| CN110077111A (en) * | 2018-05-30 | 2019-08-02 | 广东聚华印刷显示技术有限公司 | The bearing calibration of inkjet print head, device and system |
| CN110143055A (en) * | 2018-05-22 | 2019-08-20 | 广东聚华印刷显示技术有限公司 | The bearing calibration of ink droplet drops positional shift, device and system |
| CN110254051A (en) * | 2019-06-24 | 2019-09-20 | 深圳市华星光电技术有限公司 | A kind of the ink ejecting state detection system and detection method of ink gun |
| CN111332020A (en) * | 2020-03-23 | 2020-06-26 | 华中科技大学 | Multi-error compensation positioning control method and system for jet printing ink drops |
| CN111376587A (en) * | 2018-12-28 | 2020-07-07 | Tcl集团股份有限公司 | Printing control method, equipment and storage medium in printing process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI274669B (en) * | 2003-11-11 | 2007-03-01 | Ind Tech Res Inst | Method and apparatus for detecting faulty nozzles |
-
2021
- 2021-09-23 CN CN202111115052.XA patent/CN115366539B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000146993A (en) * | 1998-11-16 | 2000-05-26 | Brother Ind Ltd | Method and apparatus for detection of moving object |
| CN1593922A (en) * | 2000-06-30 | 2005-03-16 | 西尔弗布鲁克研究有限公司 | Image compensation method for ink-ejecting print |
| JP2002103627A (en) * | 2000-09-29 | 2002-04-09 | Hitachi Koki Co Ltd | Multi-nozzle ink jet recorder |
| EP1428667A2 (en) * | 2002-12-11 | 2004-06-16 | Konica Minolta Holdings, Inc. | Ink jet printer and image recording method |
| CN2628263Y (en) * | 2003-05-27 | 2004-07-28 | 兄弟工业株式会社 | Ink-jet head for ink-jet printer |
| CN1597327A (en) * | 2003-06-27 | 2005-03-23 | 三星电子株式会社 | Method of determining missing nozzles in an inkjet printer |
| CN1868744A (en) * | 2005-05-25 | 2006-11-29 | 三星电子株式会社 | Ink-jet image forming apparatus and method for compensating for defective nozzle |
| CN101402282A (en) * | 2008-10-17 | 2009-04-08 | 北京大学 | Ink jet printer and printing method thereof |
| CN102649358A (en) * | 2011-02-24 | 2012-08-29 | 富士胶片株式会社 | Drive apparatus for liquid ejection head, liquid ejection apparatus and inkjet recording apparatus |
| CN107967126A (en) * | 2017-06-13 | 2018-04-27 | 广东聚华印刷显示技术有限公司 | Printhead automatic compensation method, apparatus, storage medium and its computer equipment |
| CN108928117A (en) * | 2017-11-21 | 2018-12-04 | 广东聚华印刷显示技术有限公司 | Bearing calibration out of ink, correction system and the inkjet-printing device of inkjet-printing device |
| CN108944048A (en) * | 2017-11-21 | 2018-12-07 | 广东聚华印刷显示技术有限公司 | Localization method, positioning system and the detection system of the nozzle of inkjet-printing device |
| CN108944047A (en) * | 2017-12-26 | 2018-12-07 | 广东聚华印刷显示技术有限公司 | Inkjet printing correction method, device, storage medium and computer equipment |
| CN109703197A (en) * | 2018-03-16 | 2019-05-03 | 广东聚华印刷显示技术有限公司 | Inkjet printing ink droplet eccentric traveling distance measuring method, device and measurement substrate |
| CN110143055A (en) * | 2018-05-22 | 2019-08-20 | 广东聚华印刷显示技术有限公司 | The bearing calibration of ink droplet drops positional shift, device and system |
| CN110077111A (en) * | 2018-05-30 | 2019-08-02 | 广东聚华印刷显示技术有限公司 | The bearing calibration of inkjet print head, device and system |
| CN111376587A (en) * | 2018-12-28 | 2020-07-07 | Tcl集团股份有限公司 | Printing control method, equipment and storage medium in printing process |
| CN110254051A (en) * | 2019-06-24 | 2019-09-20 | 深圳市华星光电技术有限公司 | A kind of the ink ejecting state detection system and detection method of ink gun |
| CN111332020A (en) * | 2020-03-23 | 2020-06-26 | 华中科技大学 | Multi-error compensation positioning control method and system for jet printing ink drops |
Non-Patent Citations (1)
| Title |
|---|
| 喷墨打印头国产化未来可期;谢永林;;印刷工业(第11期);全文 * |
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