CN116160788B - Feedback correction method for OLED (organic light emitting diode) inkjet printing parameters - Google Patents
Feedback correction method for OLED (organic light emitting diode) inkjet printing parameters Download PDFInfo
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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
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Abstract
The application discloses a feedback correction method for OLED (organic light emitting diode) inkjet printing parameters, and belongs to the technical field of inkjet printing. In the application, when the (n+1) th printing position is printed, acquiring current printing parameters and first printing compensation data; the first printing compensation data are obtained by analyzing first printing result data of the N-1 printing position when the N printing position is printed; wherein N is a positive integer greater than 3; correcting the current printing parameters according to the first printing compensation data to obtain first target printing parameters; printing according to the first target printing parameters. According to the method and the device, the current printing parameters are corrected in the printing process, namely, the dynamic feedback compensation mode is adopted, so that the drop point deviation between the ink drop point and the static calibration drop point caused by the relative motion between the substrate and the spray head can be reduced, and the ideal ink-jet printing effect can be achieved rapidly.
Description
Technical Field
The application relates to the technical field of inkjet printing, in particular to a feedback correction method for OLED inkjet printing parameters.
Background
OLED (Organic Light-Emitting Diode) is increasingly used as a current type Light-Emitting device in high-performance display equipment, the quality of OLED products is closely related to the drop point of ink jet printing drops, but with the increase of the ink jet printing operation, the problem of aging, damage, failure and the like of a spray head can occur, and the problem of high cost and serious influence on the production efficiency caused by frequent replacement of the spray head can be solved, so that accurate printing control is realized according to the printing condition of the existing spray head, and the improvement of the working efficiency and the quality of finished products of a system is important.
In the prior art, a nozzle positioning method is provided, in which a detection system is used to predict the drop points of ink drops from the angle of nozzles, and a preset number of ink drop images of the nozzles for ink jet are obtained, so that the actual coordinates of the calibration nozzles are calculated, and the actual coordinates are sequentially compared with preset standard coordinates to obtain coordinate offset until the coordinate offset meets the threshold requirement of the preset offset. However, due to the relative motion between the substrate and the nozzle, the drop point of the ink is deviated from the static predicted drop point, and thus the compensation effect on the printing result is still to be improved.
Disclosure of Invention
The main objective of the present application is to provide a feedback correction method for OLED inkjet printing parameters, which aims to solve the technical problem in the prior art that the effect of compensating the inkjet printing result is poor.
To achieve the above object, the present application provides a feedback correction method for OLED inkjet printing parameters, including:
when printing the (n+1) th printing position, acquiring current printing parameters and first printing compensation data; the first printing compensation data are obtained by analyzing first printing result data of the N-1 printing position when the N printing position is printed; wherein N is a positive integer greater than 3;
correcting the current printing parameters according to the first printing compensation data to obtain first target printing parameters;
printing according to the first target printing parameters.
Optionally, before acquiring the current printing parameter and the first printing compensation data when printing the n+1th printing position, the method further includes:
acquiring the first printing result data of the N-1 printing position;
printing the Nth printing position to obtain second printing result data, and analyzing the first printing result data to obtain the first printing compensation data.
Optionally, the printing according to the first target printing parameter includes:
printing according to the first target printing parameters, and analyzing the second printing result data to obtain second printing compensation data;
weighting calculation is carried out on the first printing compensation data and the second printing compensation data to obtain target compensation data;
correcting the current printing parameters of the (n+2) th printing position according to the target compensation data to obtain second target printing parameters;
and printing the (n+2) th printing position according to the second target printing parameter.
Optionally, the printing of the n+2th printing position according to the second target printing parameter includes:
acquiring a printing position sequence; the printing position sequence comprises initial coordinates of the Nth printing position, initial coordinates of the (N+1) th printing position, step times and step amounts;
and printing the (n+2) th printing position according to the printing position sequence and the second target printing parameter.
Optionally, the correcting the current printing parameter according to the first printing compensation data to obtain a first target printing parameter includes:
if the first compensation data are integral angle offset compensation data, angle offset compensation data are obtained;
and performing angle compensation on the current printing parameters according to the angle offset compensation data to obtain the first target printing parameters.
Optionally, the correcting the current printing parameter according to the first printing compensation data to obtain a first target printing parameter includes:
if the first compensation data are monomer offset compensation data, obtaining displacement offset compensation data;
and performing displacement compensation on the current printing parameters according to the displacement offset compensation data to obtain the first target printing parameters.
Optionally, the correcting the current printing parameter according to the displacement offset compensation data to obtain a first target printing parameter includes:
judging whether the displacement offset compensation data is larger than preset displacement offset compensation data or not;
if not, obtaining displacement deviation compensation data of the displacement deviation compensation data and the preset displacement deviation compensation data, and correcting the current printing parameters according to the displacement deviation compensation data to obtain first target printing parameters;
if yes, outputting forbidden information to remind the user to forbidden the current nozzle.
In a second aspect, the present application provides a feedback correction device for OLED inkjet printing parameters, the device comprising:
the acquisition module is used for acquiring current printing parameters and first printing compensation data when the (n+1) th printing position is printed; the first printing compensation data are obtained by analyzing first printing result data of the N-1 printing position when the N printing position is printed; wherein N is a positive integer greater than 3;
the correction module is used for correcting the current printing parameters according to the first printing compensation data to obtain first target printing parameters;
and the printing module is used for printing according to the first target printing parameters.
In a third aspect, the present application provides a feedback correction device for OLED inkjet printing parameters, a memory, a processor and a feedback correction program for OLED inkjet printing parameters stored on the memory and executable on the processor, the feedback correction device for OLED inkjet printing parameters being configured to implement the steps of the feedback correction method for OLED inkjet printing parameters as described above.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of a method for feedback correction of OLED inkjet printing parameters as described above.
In the feedback correction method for the OLED inkjet printing parameters provided by the embodiment of the application, when the (n+1) th printing position is printed, the current printing parameters and the first printing compensation data are acquired; the first printing compensation data are obtained by analyzing first printing result data of the N-1 printing position when the N printing position is printed; wherein N is a positive integer greater than 3; correcting the current printing parameters according to the first printing compensation data to obtain first target printing parameters; printing according to the first target printing parameters.
Therefore, the printing results of the spray heads with different heights and different ranges are analyzed, and then the drop point deviation between the ink drop point and the static calibration drop point caused by the relative movement between the substrate and the spray heads is reduced in a mode of correcting the current printing parameters in the printing process, namely in a dynamic feedback compensation mode, so that the ideal ink-jet printing effect can be achieved rapidly.
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FIG. 1 is a schematic structural diagram of a feedback correction device for OLED inkjet printing parameters of a hardware operating environment according to an embodiment of the present application;
FIG. 2 is a flowchart of a first embodiment of a feedback correction method for OLED inkjet printing parameters according to the present application;
FIG. 3 is a schematic diagram of the OLED pre-calibration system of the present application;
FIG. 4 is a schematic structural view of a pre-calibration substrate of the present application;
FIG. 5 is a flowchart of a second embodiment of a feedback correction method for OLED inkjet printing parameters according to the present application;
FIG. 6 is a flowchart of a third embodiment of a feedback correction method for OLED inkjet printing parameters according to the present application;
fig. 7 is a schematic functional block diagram of a feedback correction device for OLED inkjet printing parameters according to the present application.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
In the prior art, a nozzle positioning method is provided, in which a detection system is used to predict the drop points of ink drops from the angle of nozzles, and a preset number of ink drop images of the nozzles for ink jet are obtained, so that the actual coordinates of the calibration nozzles are calculated, and the actual coordinates are sequentially compared with preset standard coordinates to obtain coordinate offset until the coordinate offset meets the threshold requirement of the preset offset. However, due to the relative motion between the substrate and the nozzle, the drop point of the ink is deviated from the static predicted drop point, and thus the compensation effect on the printing result is still to be improved.
The application provides a solution, through carrying out the analysis to the printing result of the shower nozzle of co-altitude, different scope, then through the mode of carrying out the correction to current printing parameter in the printing process, adopt dynamic feedback compensation's mode promptly, reduce the drop deviation between the ink droplet drop and the static calibration drop that lead to because of the relative motion between base plate and the shower nozzle, and then can reach ideal inkjet printing effect fast.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a feedback correction device for OLED inkjet printing parameters of a hardware operation environment according to an embodiment of the present application.
As shown in fig. 1, the feedback correction device of OLED inkjet printing parameters may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) Memory or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 does not constitute a limitation of the feedback correction device for OLED inkjet printing parameters, and may include more or fewer components than shown, or certain components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and a feedback correction program for OLED inkjet printing parameters.
In the feedback correction device of OLED inkjet printing parameters shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the feedback correction device for the OLED inkjet printing parameters may be provided in the feedback correction device for the OLED inkjet printing parameters, and the feedback correction device for the OLED inkjet printing parameters invokes the feedback correction program for the OLED inkjet printing parameters stored in the memory 1005 through the processor 1001, and executes the feedback correction method for the OLED inkjet printing parameters provided in the embodiment of the present application.
The present application provides a first embodiment of a feedback correction method for OLED inkjet printing parameters based on the hardware structure of the feedback correction device for OLED inkjet printing parameters but not limited to the hardware structure. Referring to fig. 2, fig. 2 is a flow chart schematically showing a first embodiment of a feedback correction method for applying OLED inkjet printing parameters.
It should be noted that although a logical order is depicted in the flowchart, in some cases the steps depicted or described may be performed in a different order than presented herein.
In this embodiment, the feedback correction method for the OLED inkjet printing parameters includes:
step S10, when printing the (n+1) th printing position, acquiring current printing parameters and first printing compensation data; the first printing compensation data are obtained by analyzing first printing result data of the N-1 printing position when the N printing position is printed; wherein N is a positive integer greater than 3.
The execution subject of the feedback correction method of the OLED inkjet printing parameters is a terminal device with an interactive and display function, such as an industrial computer, and the application is not limited thereto.
Referring to fig. 3, fig. 3 is a schematic diagram of a structure diagram of an OLED pre-calibration system, which is divided into four parts including a main body part, a moving part, a sampling part and a printing part. The main body part is composed of a first bracket and a second bracket and is used for fixing and supporting the moving part, the sampling part and the printing part. The motion part comprises a horizontal sliding guide rail and a vertical sliding guide rail, the motion of the sampling part and the printing part in the XYZ direction is realized by driving the horizontal sliding guide rail and/or the vertical sliding guide rail to move through a motor, the joint of the first support and the second support is used as a three-dimensional coordinate origin, a three-dimensional coordinate XYZ is constructed, the first support comprises an X-direction guide rail, the X direction extends along the width direction of the second support, the first support further comprises a Z-direction guide rail, and the Z direction is the vertical direction of the first support. The second support comprises a Y-direction guide rail, and the Y-direction guide rail extends along the length direction of the second support. The sampling section includes a camera and a lens. The printing part comprises a printing nozzle and a printing pre-calibration substrate.
For example, when printing the n+1th printing position, after the first printing result data of the N-1th printing position observed by the sampling part is imported into the terminal device, the terminal device analyzes the printing result data to obtain the first printing compensation data.
In this embodiment, the current printing parameter may be a sequence number, a start position, a step number, a step amount, a head angle, and the like of the n+1th printing position when the n+1th printing position is printed when the ink path system is operating normally.
The print result data may be ink drop positions in the printed print position. The first print compensation data may be correction data required for posture adjustment of the nozzle obtained after analyzing the first print result data of the N-1 th printing position when the N-th printing position is printed.
And step S20, correcting the current printing parameters according to the first printing compensation data to obtain first target printing parameters.
And step S30, printing according to the first target printing parameters.
In this embodiment, the first target printing parameter may be a printing parameter obtained by correcting the current printing parameter according to the first compensation data.
It can be understood that in a print job, a nozzle needs to jet ink for multiple times for different pixel slots, each nozzle is independent, and optimization for a certain nozzle does not affect other nozzles, so that in order to avoid that the actual drop point of ink droplets ejected by the nozzle in the pixel slots and the error of a preset drop point are too large, the jet printing effect and the product quality are affected, when the current printing position is printed, the current printing parameters of the nozzle need to be corrected according to the first printing compensation data of the nozzle, and after the first target printing parameters are obtained, printing is performed according to the first target printing parameters, so that the error of the actual drop point of ink droplets and the preset drop point is reduced.
Specifically, the pre-calibration system performs motion system self-checking after starting up, after self-checking is qualified, a pre-calibration substrate is placed by a human or robot, after the substrate is placed, an initial positioning function is assisted by a sampling system, four positioning targets on the pre-calibration substrate are firstly collected, then the space position of the current substrate is determined according to the target positions on the four substrates, then a guide rail is driven to move the substrate to a correct position, the targets are positioned again and move to the corresponding positions again until the positions of the targets are correct, and positioning is considered to be completed, and particularly, reference is made to fig. 4. When a large deviation, such as excessive rotational deviation or pitching deviation, occurs on the substrate, the system prompts the user to manually adjust the substrate, and then re-starts the substrate positioning function. After the substrate is positioned, the ink path system is detected to ensure that the parameters such as the connection state of the ink path system, the ink path pressure and the like are in a normal working state.
At the beginning of the pre-printing, a print area is manually selected by a user, and the pre-calibration substrate is usually divided into 4 print areas, comprising the same or different four detection groove separation designs, so that the user can select the print area by himself according to the requirement, and then the pre-printing function is started, and the leftmost detection groove 10 column of the area is printed first, which is matched with the camera visual field in the sampling system. After the test system finishes printing, observing and analyzing the printing result, if the user is satisfied with the printing result, entering the next operation step, otherwise, manually or automatically adjusting the position of the substrate, and repeating the pre-printing step in the next 10 rows of detection grooves until the pre-printing effect is satisfied. If the N-1 print job is finished, the system starts to observe the printing drop point, samples and analyzes the ink drop point result, after the sampling is finished, the system enters the N position to start the N print job, meanwhile analyzes the N-1 print result, and when all the print jobs are executed, and all the print results are analyzed to finish the printing.
In this embodiment, when the n+1th printing position is printed, the current printing parameters and the first printing compensation data are acquired; the first printing compensation data are obtained by analyzing first printing result data of the N-1 printing position when the N printing position is printed; wherein N is a positive integer greater than 3; correcting the current printing parameters according to the first printing compensation data to obtain first target printing parameters; printing according to the first target printing parameters. Therefore, the printing results of the nozzles with different heights and different ranges are analyzed, and then the current printing parameters are corrected in the printing process, namely, the dynamic feedback compensation mode is adopted, namely, the current printing parameters in the subsequent printing operation are compensated when the first group of data is returned, so that the drop point deviation between the ink drop point and the static calibration drop point caused by the relative movement between the substrate and the nozzles is reduced, and the ideal ink jet printing effect can be achieved rapidly.
Further, as an embodiment, referring to fig. 5, the second embodiment of the feedback correction method for OLED inkjet printing parameters according to the present application further includes, before step S10, based on the embodiment shown in fig. 5, the following steps:
and S8, acquiring the first printing result data of the N-1 printing position.
And step S9, printing the Nth printing position to obtain second printing result data, and analyzing the first printing result data to obtain the first printing compensation data.
In this embodiment, the first print compensation data is a correction parameter obtained by analyzing the first print result data of the N-1 th print position when the N-th position is printed.
As an alternative embodiment, the step-compensation analysis method may be used to analyze the first print result data, so as to avoid the occurrence of the situation that the time required for analysis is long and random errors may exist in the single print result.
Specifically, after the sampling of the printing result of the last printing position is finished, when the next printing position is started to be printed, the printing result of one printing position is analyzed by adopting a stride compensation analysis method. If the N-1 print job is finished, the system starts to observe the printing drop point, samples and analyzes the ink drop point result, and after the sampling is finished, the system enters the nth position to start the nth print job, so as to obtain the second print result data, and simultaneously analyzes the N-1 print result, namely, the first print result data to obtain the first print compensation data.
As an alternative embodiment, step S30 specifically includes:
step S301, performing printing according to the first target printing parameter, and analyzing the second printing result data to obtain second printing compensation data.
Step S302, performing a weighted calculation on the first print compensation data and the second print compensation data to obtain target compensation data.
And step S303, correcting the current printing parameter of the (n+2) th printing position according to the target compensation data to obtain a second target printing parameter.
And step S304, printing the (n+2) th printing position according to the second target printing parameter.
In this embodiment, the target compensation data may be an adjustment amount required to adjust the deviation caused by the relative movement between the substrate and the head during the actual printing process.
Specifically, after the sampling of the printing result of the last printing position is finished, when the next printing position is started to be printed, the printing result of one printing position is analyzed by adopting a stride compensation analysis method. If, for example, observation is made for the x-th nozzle, the m drop sequences per printing of this nozzle are recorded as { xa1, xa 2..the.. The xam }, then for the n+1th print job, the nozzle deviation is the result of the weighted standard deviation calculation compensation for the 1, 2, 3,..the.,. The N-1 times, and the printing result of the (N-1) th time is calculated in the (N) th time of printing, namely, when the (N) th printing position is printed, the first printing result data is analyzed to obtain the first printing compensation data. Correcting the current printing parameters according to the first printing compensation data, printing the (n+1) th position according to the first target printing parameters after obtaining the first target printing parameters, analyzing the second printing result data of the (N) th printing position to obtain second printing compensation data, finally carrying out weighted calculation on the second printing compensation data and the first printing compensation data to obtain second target compensation data, and using the second target compensation data for compensating the current printing parameters of the (n+2) th time.
In one example, a print position sequence is also acquired; the printing position sequence comprises initial coordinates of the Nth printing position, initial coordinates of the (N+1) th printing position, step times and step amounts; and printing the (n+2) th printing position according to the printing position sequence and the second target printing parameter.
It will be appreciated that the sequence of print positions may be a sequence of print positions planned in advance, with sequential execution requirements. And the serial number is used for designating the unique code of each printing position in the printing position sequence, and is simultaneously used for marking the sampling result during sampling, so that an experimenter can conveniently classify a large number of sampling results. And the starting position is used for recording the initial coordinates of each printing position in each printing position sequence, and printing can be started when the motion system moves to the position with the initial coordinates. The number of steps is used for recording the number of steps in each piece of printing position information, after each column of ink drops is printed, the system steps once, and the printing task corresponding to each piece of printing position information usually comprises a plurality of columns, so that the number of steps is required to be recorded. The step amount is used for recording the step amplitude corresponding to each step, and the number of the step amounts corresponds to the step times.
Specifically, the print position sequence is designed mainly by the following steps:
step 1: firstly, related data information of the spray head is obtained from a manufacturer, wherein the related data information comprises the specification of the spray head, the position of the spray nozzle, the driving voltage and the like.
Step 2: the nozzle is positioned according to the design position of the nozzle, the purpose of this step is to eliminate the deviation of the design position of the nozzle from the actual position, to improve the accuracy of the position sequence planning, and steps 1 and 2 are only performed when planning a new nozzle for the first time.
Step 3: searching the last detection result, automatically or manually screening or removing some nozzles, designing a motion path by a system, and recording coordinate points of the nozzles on the path. The purpose of this step is to reduce unnecessary nozzle detection, improve detection efficiency and detection time, and specific design methods are classified into a conventional method and a shortest path planning method.
Step 4: and performing sports shooting and analysis according to the planned path, wherein the analysis result is used for optimizing the path planning again.
Specifically, the conventional method is to traverse each nozzle to be detected in a serpentine manner, and has the advantages of high algorithm planning speed, consistent coordinates with those in the step 3, convenience in recording, storing and analyzing, and long time for traversing the path. In this embodiment, a shortest path planning method, such as Bellman ford algorithm, is adopted, each time all edges are traversed, the arrival point of each edge is loosened, a total of L-1 times is traversed, where L is the number of vertices, double circulation, outer circulation is the number of vertices, and inner circulation traverses all edges, if there is a negative weight, after the first operation, a basic shortest path array can be obtained, at this time, the last step needs to be repeated, and it is determined whether there is a negative weight, but the update is not performed in the loosening step, and instead, the distance value of the point capable of being updated is set to be minus infinity, which indicates that the point is the vertex in the negative circulation (the negative weight ring or those vertices affected by the negative weight ring), and indicates that there is a negative weight. The method has the advantages of higher speed, and especially for scenes which need to be detected by a plurality of spray heads at the same time. The disadvantage is that the coordinate position on the path changes and an additional coordinate transformation is required during the analysis.
In this embodiment, when printing is performed on the n+2th printing position, the stride compensation analysis method is used to analyze the second printing result data, after obtaining the second printing compensation data, the weighting calculation is performed on the first printing compensation data and the second printing compensation data to obtain the target compensation data, the current printing parameters are corrected according to the target compensation data to obtain the second target printing parameters, and the n+2th printing position is printed according to the second target printing parameters. The stride compensation analysis method is utilized to analyze the printing result, so that the analysis time of the printing result data can be shortened, the detection efficiency can be improved, and the situation that random errors occur due to longer analysis time can be avoided.
Further, referring to fig. 6, as an embodiment, the present application provides a third embodiment of a feedback correction method for OLED inkjet printing parameters, based on the embodiment shown in fig. 6, the step S20 includes:
step S201, if the first compensation data is overall angular offset compensation data, obtaining angular offset compensation data.
And step S202, performing angle compensation on the current printing parameters according to the angle offset compensation data to obtain the first target printing parameters.
In this embodiment, the overall angle offset compensation data may be angle compensation data required for correcting the angles of all the printing heads when the angle offset is found in the result analysis for all the printing heads in the printing apparatus. The angular offset compensation data may be obtained by comparing the first print result data of the N-1 th print position with respect to the predicted ideal print result.
It will be appreciated that when the first compensation data is not the global angular offset compensation data, but the individual offset compensation data, the individual offset compensation data may be the displacement compensation data required to correct a print head having a displacement offset when the displacement offset is found in the result analysis for a print head in the printing apparatus. The displacement deviation compensation data may be obtained by comparing the first print result data of the N-1 th print position with respect to the predicted ideal print result.
Specifically, when performing displacement compensation on the current printing parameters according to the displacement offset compensation data, judging whether the displacement offset compensation data is larger than preset displacement offset compensation data, if not, obtaining displacement offset compensation data of the displacement offset compensation data and the preset displacement offset compensation data, and correcting the current printing parameters according to the displacement offset compensation data to obtain first target printing parameters; if yes, outputting forbidden information to remind the user to forbidden the current nozzle.
In this embodiment, when the first compensation data is overall angular offset compensation data, angular compensation is performed on the current printing parameters according to the angular offset compensation data; when the first compensation data is single offset compensation data, the current printing parameters are subjected to displacement compensation according to the displacement offset compensation data, so that the current printing parameters are corrected according to different types of compensation data, and the accuracy of a printing result can be improved. In addition, when the displacement offset compensation data is larger than the preset displacement offset compensation data, disabling information is output to remind a user to disable the current nozzle, so that the situation that the quality of a product is seriously affected due to the fact that the nozzle offset is large or the offset is large and the range is irregular is avoided.
Based on the same application conception, a feedback correction device for the OLED inkjet printing parameters is provided, and referring to FIG. 7, FIG. 7 is a schematic diagram of functional modules of the feedback correction device for the OLED inkjet printing parameters.
An acquiring module 10, configured to acquire current printing parameters and first printing compensation data when printing the (n+1) th printing position; the first printing compensation data are obtained by analyzing first printing result data of the N-1 printing position when the N printing position is printed; wherein N is a positive integer greater than 3.
And the correction module 20 is configured to correct the current printing parameter according to the first printing compensation data to obtain a first target printing parameter.
And the printing module 30 is used for printing according to the first target printing parameters.
It should be noted that, more modules may be further configured in the feedback correction device for the OLED inkjet printing parameters, and each module of the feedback correction device for the OLED inkjet printing parameters may implement all the steps of the method in the foregoing embodiments, which is not described herein.
According to the technical scheme of the embodiment, through mutual coordination among the functional modules, when the (N+1) th printing position is printed, current printing parameters and first printing compensation data are obtained; the first printing compensation data are obtained by analyzing first printing result data of the N-1 printing position when the N printing position is printed; wherein N is a positive integer greater than 3; correcting the current printing parameters according to the first printing compensation data to obtain first target printing parameters; printing according to the first target printing parameters. Therefore, in the embodiment, by analyzing the printing results of the nozzles with different heights and different ranges and then correcting the current printing parameters in the printing process, namely, adopting a dynamic feedback compensation mode, the drop point deviation between the ink drop point and the static calibration drop point caused by the relative motion between the substrate and the nozzle is reduced, so that the ideal ink jet printing effect can be quickly achieved.
In addition, the embodiment of the application also provides a computer storage medium, on which a feedback correction program of the OLED inkjet printing parameters is stored, and the steps of the feedback correction method of the OLED inkjet printing parameters are implemented when the feedback correction program of the OLED inkjet printing parameters is executed by a processor. Therefore, a detailed description will not be given here. In addition, the description of the beneficial effects of the same method is omitted. For technical details not disclosed in the embodiments of the computer-readable storage medium according to the present application, please refer to the description of the method embodiments of the present application. As an example, the program instructions may be deployed to be executed on one computing device or on multiple computing devices at one site or distributed across multiple sites and interconnected by a communication network.
Those skilled in the art will appreciate that implementing all or part of the above-described methods may be accomplished by way of computer programs, which may be stored on a computer-readable storage medium, and which, when executed, may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random access Memory (Random AccessMemory, RAM), or the like.
It should be further noted that the above-described apparatus embodiments are merely illustrative, where elements described as separate elements may or may not be physically separate, and elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the embodiment of the device provided by the application, the connection relation between the modules represents that the modules have communication connection therebetween, and can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the present application may be implemented by means of software plus necessary general purpose hardware, or of course may be implemented by dedicated hardware including application specific integrated circuits, dedicated CPUs, dedicated memories, dedicated components and the like. Generally, functions performed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same functions can be varied, such as analog circuits, digital circuits, or dedicated circuits. However, a software program implementation is a preferred embodiment in many cases for the present application. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a Read-only memory (ROM), a random-access memory (RAM, randomAccessMemory), a magnetic disk or an optical disk of a computer, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method of the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (9)
1. A method for feedback correction of OLED inkjet printing parameters, the method comprising:
when printing the (n+1) th printing position, acquiring current printing parameters and first printing compensation data; the first printing compensation data are obtained by analyzing first printing result data of the N-1 printing position when the N printing position is printed; wherein N is a positive integer greater than 3;
correcting the current printing parameters according to the first printing compensation data to obtain first target printing parameters;
printing according to the first target printing parameters;
the method further includes, before acquiring the current printing parameter and the first printing compensation data when printing the n+1th printing position:
acquiring the first printing result data of the N-1 printing position;
printing the Nth printing position to obtain second printing result data, and analyzing the first printing result data to obtain the first printing compensation data.
2. The method of claim 1, wherein printing according to the first target printing parameters comprises:
printing according to the first target printing parameters, and analyzing the second printing result data to obtain second printing compensation data;
weighting calculation is carried out on the first printing compensation data and the second printing compensation data to obtain target compensation data;
correcting the current printing parameters of the (n+2) th printing position according to the target compensation data to obtain second target printing parameters;
and printing the (n+2) th printing position according to the second target printing parameter.
3. The method of feedback correction of OLED inkjet printing parameters according to claim 2, wherein said printing of the n+2th printing position according to the second target printing parameters includes:
acquiring a printing position sequence; the printing position sequence comprises initial coordinates of the Nth printing position, initial coordinates of the (N+1) th printing position, step times and step amounts;
and printing the (n+2) th printing position according to the printing position sequence and the second target printing parameter.
4. The method for correcting the feedback of the OLED inkjet printing parameters according to claim 1, wherein correcting the current printing parameters according to the first print compensation data to obtain first target printing parameters includes:
if the first compensation data are integral angle offset compensation data, angle offset compensation data are obtained;
and performing angle compensation on the current printing parameters according to the angle offset compensation data to obtain the first target printing parameters.
5. The method for correcting the feedback of the OLED inkjet printing parameters according to claim 1, wherein correcting the current printing parameters according to the first print compensation data to obtain first target printing parameters includes:
if the first compensation data are monomer offset compensation data, obtaining displacement offset compensation data;
and performing displacement compensation on the current printing parameters according to the displacement offset compensation data to obtain the first target printing parameters.
6. The method for correcting feedback of an OLED inkjet printing parameter according to claim 5, wherein correcting the current printing parameter according to the displacement offset compensation data to obtain a first target printing parameter includes:
judging whether the displacement offset compensation data is larger than preset displacement offset compensation data or not;
if not, obtaining displacement deviation compensation data of the displacement deviation compensation data and the preset displacement deviation compensation data, and correcting the current printing parameters according to the displacement deviation compensation data to obtain first target printing parameters;
if yes, outputting forbidden information to remind the user to forbidden the current nozzle.
7. A feedback correction device for OLED inkjet printing parameters, the device comprising:
the acquisition module is used for acquiring current printing parameters and first printing compensation data when the (n+1) th printing position is printed; the first printing compensation data are obtained by analyzing first printing result data of the N-1 printing position when the N printing position is printed; wherein N is a positive integer greater than 3;
the correction module is used for correcting the current printing parameters according to the first printing compensation data to obtain first target printing parameters;
a printing module for printing according to the first target printing parameters
The acquisition module is further used for acquiring the first printing result data of the (N-1) th printing position; printing the Nth printing position to obtain second printing result data, and analyzing the first printing result data to obtain the first printing compensation data.
8. A feedback correction device for OLED inkjet printing parameters, comprising: a processor, a memory and a feedback correction program for OLED inkjet printing parameters stored in the memory, which when executed by the processor, implements the steps of the feedback correction method for OLED inkjet printing parameters according to any one of claims 1 to 6.
9. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a feedback correction program of OLED inkjet printing parameters, which when executed by a processor, implements the method of feedback correction of OLED inkjet printing parameters according to any one of claims 1 to 6.
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| JPS54126538A (en) * | 1978-03-25 | 1979-10-01 | Ricoh Co Ltd | Compensator of time intervals of dots in ink jet printing |
| US20070070109A1 (en) * | 2005-09-29 | 2007-03-29 | White John M | Methods and systems for calibration of inkjet drop positioning |
| CN102173200A (en) * | 2011-01-10 | 2011-09-07 | 西安电子科技大学 | Ink droplet droppoint deviation compensation method in bidirectional printing of inkjet printer |
| CN109955607B (en) * | 2017-12-14 | 2020-11-17 | 海德堡印刷机械股份公司 | Method for automatically calibrating a printing press having an image detection system by means of a computer |
| CN109823050B (en) * | 2018-12-29 | 2019-12-24 | 华中科技大学 | Multi-stage positioning error compensation method and device for liquid drop ejection for ink-jet printing |
| CN112339433B (en) * | 2019-12-04 | 2021-11-23 | 广东聚华印刷显示技术有限公司 | Method, system, equipment and storage medium for nozzle alignment compensation of ink-jet printing device |
| CN113829755B (en) * | 2020-06-08 | 2022-12-09 | 深圳市汉森软件有限公司 | Method, apparatus, device and medium for compensating drop deviation in bidirectional printing |
| CN114030301A (en) * | 2020-12-31 | 2022-02-11 | 广东聚华印刷显示技术有限公司 | Ink jet printing control method, control device and ink jet printing system |
| CN113752698B (en) * | 2021-08-31 | 2022-07-12 | 华中科技大学 | Ink drop point precision control method and system for ink jet printing |
| CN114536975B (en) * | 2022-02-28 | 2023-03-28 | 华中科技大学 | Method and device for detecting positioning precision of ink drop point in ink-jet printing |
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