CN115008900A - Flexible display jet printing film edge straightness control method and system - Google Patents

Flexible display jet printing film edge straightness control method and system Download PDF

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CN115008900A
CN115008900A CN202210523351.5A CN202210523351A CN115008900A CN 115008900 A CN115008900 A CN 115008900A CN 202210523351 A CN202210523351 A CN 202210523351A CN 115008900 A CN115008900 A CN 115008900A
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liquid film
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straightness
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CN115008900B (en
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陈建魁
喻梦雯
肖小亮
金一威
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Huazhong University of Science and Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/07—Ink jet characterised by jet control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
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Abstract

The invention belongs to the technical field of flexible display, and particularly relates to a method and a system for controlling the edge straightness of a flexible display spray printing film, wherein the method comprises the following steps: adjusting input parameters and controlling the liquid film to test and print within the effective range of each input parameter for printing so that the thickness of the liquid film meets the requirement of the liquid film; collecting a liquid film edge contour picture for calculating a liquid film edge straightness parameter under the current input parameter, if the straightness parameter does not reach the straightness constraint, correcting the input parameter and continuing to control trial printing until the straightness constraint is reached to obtain an optimal input parameter; controlling formal printing by adopting the optimal input parameters to finish the edge straightness control of the spray printing film; wherein, straightness accuracy parameter includes: an amplitude parameter, a maximum width parameter, a pitch characteristic parameter, and a profile length rate. The invention obtains the optimal input parameters which enable the edge straightness of the liquid film to meet the requirements in the ink-jet trial printing stage, and applies the optimal input parameters to formal printing, thereby obtaining the high-quality liquid film.

Description

Flexible display jet printing film edge straightness control method and system
Technical Field
The invention belongs to the technical field of flexible display, and particularly relates to a method and a system for controlling edge straightness of a flexible display jet printing film.
Background
Inkjet printing is a contactless, low-cost, directly patternable deposition technique that has been widely used in the electronics industry. Because the technology has the advantages of simple process, high resolution, small material loss, suitability for large-area preparation and the like, the ink-jet printing technology has great potential in the production of OLED display devices, and the technology gradually replaces the vacuum thermal evaporation technology and becomes the most promising OLED display manufacturing technology. At present, the liquid film prepared by the ink-jet printing technology is mainly applied to the field of TFE film packaging.
When the organic packaging film is prepared by ink-jet printing, the quality of the organic functional layer film determines the brightness uniformity and the service life of the OLED device printed by ink-jet printing. However, in the formal printing process, the larger the size of the OLED panel is, the more difficult the straightness of the edge of the printed liquid film is to be controlled, and the worse the straightness of the edge of the liquid film is, in the subsequent cutting process, the more easily the edge of the film is cut, so that the film is in direct contact with air, and moisture and oxygen in the air react with the OLED through the liquid film to cause packaging failure, so that the yield of the OLED display screen is reduced, and the manufacturing cost is increased. Therefore, there is a need in the art for a method for controlling the straightness of the edge of the liquid film, which is further improved, and which can reduce the cost and meet the increasing technological requirements at present.
Disclosure of Invention
Aiming at the defects and improvement requirements of the prior art, the invention provides a method and a system for controlling the edge straightness of a flexible display spray printing film, aiming at obtaining the optimal input parameters which enable the edge straightness of a liquid film to meet the requirements in the ink-jet trial printing stage and applying the optimal input parameters to formal printing so as to obtain the high-quality liquid film.
To achieve the above object, according to one aspect of the present invention, there is provided a method for controlling edge straightness of a flexible display inkjet printing film, including:
adjusting input parameters and controlling the liquid film to test and print within the effective range of each input parameter for printing so that the thickness of the liquid film meets the requirement of the liquid film; collecting a liquid film edge contour picture for calculating a liquid film edge straightness parameter under the current input parameter, if the straightness parameter does not reach the straightness constraint, correcting the input parameter and continuing to control trial printing until the straightness constraint is reached to obtain an optimal input parameter;
controlling formal printing by adopting the optimal input parameters to finish the edge straightness control of the spray printing film;
wherein the straightness parameters include: amplitude parameter L a Maximum width parameter L z Distance characteristic parameter L sm And a profile length ratio L mr(e) ；L a The arithmetic mean value of the distances between each point on the liquid film edge profile and the datum line is represented; l is z Representing the sum of the maximum peak height and the maximum valley depth from the reference line on the edge profile of the liquid film; l is sm The width average value of a profile unit consisting of all peaks and adjacent valleys on the edge profile of the liquid film is represented; l is mr(e) And the ratio of the sum of the lengths of all the intersecting line segments after the parallel line with the distance of e from the reference line intersects with the liquid film edge contour line to the sampling length of the liquid film edge contour line is expressed.
Further, the effective range is determined by:
and carrying out simulated spray printing based on the area to be printed of the liquid film, and determining the effective range of each input parameter for printing by taking the edge contour straightness of the liquid film as a reference index.
Further, the implementation manner of calculating the liquid film edge straightness parameter under the current input parameter is as follows:
based on the edge contour picture of the liquid film, the edge coordinate data (x) of the extracting solution film i ,y i )，x i Abscissa, y, representing the sample point i A vertical coordinate representing a point corresponding to the contour line;
based on the liquid film edge data (x) i ,y i ) Fitting the liquid film edge contour line function L (x) and determining the liquid film edge contourA baseline of the line function L (x);
calculating the edge contour straightness parameters of the liquid film:
Figure BDA0003642915630000031
L z ＝L p +L v ＝max{L(x)-y D } p +max{L(x)-y D } v ；
Figure BDA0003642915630000032
Figure BDA0003642915630000033
wherein L is t The sampling length of the liquid film edge contour line is represented; l is p 、L v Respectively representing the maximum peak height and the maximum valley depth from a reference line on the edge profile of the liquid film, wherein a subscript P represents the peak height, and a subscript V represents the valley depth; y is D Representing the contour reference line of the edge of the liquid film; l is si The width of the representative contour unit is the length of a line segment obtained after the combination of one peak and adjacent valleys of the liquid film edge contour is intersected with the datum line; a line parallel to the reference line and spaced from the reference line by a distance e, l (e) represents the length k of the line intersecting the edge contour of the liquid film i N is the total number of sample points, and m represents the total number of contour elements.
Further, a polynomial is adopted to fit the liquid film edge contour function L (x).
Further, the straightness constraint is:
Figure BDA0003642915630000034
wherein L is a * 、L z * 、L sm * 、L mr(e) * Respectively represent the process pairs in the actual printing processAnd the standard requirement of the straightness of the edge profile of the liquid film.
Further, when the liquid film thickness does not meet the requirement, the adjustment step length Δ R, Δ v, Δ d of each input parameter are respectively:
Figure BDA0003642915630000035
Figure BDA0003642915630000036
Figure BDA0003642915630000041
wherein R is 1 、v 1 And d 1 Respectively representing the ink drop radius calibration value, the speed calibration value and the ink drop interval calibration value, and used for correcting the input parameters R, v and d.
When the liquid film edge straightness parameter does not meet the requirement, the adjustment step length delta R, delta v and delta d of each input parameter are respectively as follows:
ΔR＝R a (L a -L a * )+R z (L z -L z * )+R sm (L sm -L sm * )+R mr(e) (L mr(e) -L mr(e) * )；
Δv＝v a (L a -L a * )+v z (L z -L z * )+v sm (L sm -L sm * )+v mr(e) (L mr(e) -L mr(e) * )；
Δd＝d a (L a -L a * )+d z (L z -L z * )+d sm (L sm -L sm * )+d mr(e) (L mr(e) -L mr(e) * )；
wherein L is a * 、L z * 、L sm * 、L mr(e) * Respectively representing the standard requirements of the technology on the straightness of the contour of the edge of the liquid film in the actual printing process; r a 、R z 、R sm 、R mr(e) Representing the calibrated value of the radius of the ink drop; v. of a 、v z 、v sm 、v mr(e) Represents a speed calibration value; d is a radical of a 、d z 、d sm 、d mr(e) Representing the calibrated value of the ink drop interval for correcting the input parameters R, v and d.
The invention also provides a system for controlling the edge straightness of the flexible display jet printing film, which comprises: a vision module and a system control module;
the system control module is used for adjusting input parameters and controlling liquid film trial printing within the effective range of each input parameter for printing so that the thickness of a liquid film meets the requirement of the liquid film;
the vision module is used for collecting a liquid film edge outline picture;
the system control module is also used for calculating the straightness accuracy parameter of the edge of the liquid film under the current input parameter based on the outline picture of the edge of the liquid film, if the straightness accuracy parameter does not reach the straightness accuracy constraint, correcting the input parameter and continuing to control trial printing until the straightness accuracy constraint is reached to obtain the optimal input parameter; controlling formal printing by adopting the optimal input parameters;
wherein the straightness parameters include: amplitude parameter L a Maximum width parameter L z Distance characteristic parameter L sm And a profile length ratio L mr(e) ；L a The arithmetic mean value of the distances between each point on the liquid film edge profile and the datum line is represented; l is z Representing the sum of the maximum peak height and the maximum valley depth from the reference line on the edge profile of the liquid film; l is a radical of an alcohol sm The width average value of a profile unit consisting of all peaks and adjacent valleys on the edge profile of the liquid film is represented; l is mr(e) And the ratio of the sum of the lengths of all the intersecting line segments after the parallel line with the distance of e from the reference line intersects with the liquid film edge contour line to the sampling length of the liquid film edge contour line is expressed.
Further, the system control module adopts a white light interferometer to measure the thickness of the liquid film.
Further, the vision module adopts a scanning camera to scan the contour picture of the edge of the liquid film.
The invention also provides a computer readable storage medium, which comprises a stored computer program, wherein when the computer program is executed by a processor, the device on which the storage medium is located is controlled to execute the method for controlling the edge straightness of the flexible display jet printing film.
Generally, by the above technical solution conceived by the present invention, the following beneficial effects can be obtained:
(1) the invention closely combines the condition of preparing the liquid film by the ink-jet printing technology to analyze, defines the edge straightness parameter of the liquid film in a targeted manner, judges the edge straightness condition of the prepared liquid film according to the process requirement, obtains the optimal input parameter which ensures that the edge straightness of the liquid film meets the requirement in the trial printing and applies the optimal input parameter to the formal printing, thereby obtaining the high-quality liquid film.
(2) The invention further relies on the liquid film edge predictor (simulation prediction), obtain the effective range of every input parameter at the beginning in the trial printing stage, thus reduce the loss of manpower, financial resources and material resources.
(3) The invention further combines a scanning camera to extract the contour information of the edge of the liquid film after printing and calculate the edge straightness parameter of the liquid film, thereby realizing the quantitative judgment of the edge straightness of the liquid film.
(4) According to the method, the input parameters of the system are corrected according to the condition that the thickness of the liquid film and the edge straightness of the liquid film after printing do not meet the standard requirements, and the efficiency of obtaining the optimal input parameters is improved.
Drawings
FIG. 1 is a schematic view of the overall configuration of a system for controlling the edge straightness of a flexible display inkjet printing film according to an embodiment of the present invention;
FIG. 2 is a block diagram of a method for controlling edge straightness of a flexible display inkjet printing film according to an embodiment of the present invention;
FIG. 3 is a process flow diagram of a method for controlling edge straightness of a flexible display inkjet printed film according to an embodiment of the present invention;
FIG. 4 is a system flowchart of a method for controlling edge straightness of a flexible display inkjet printed film according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a reference line of an edge of a liquid film in the method for controlling the edge straightness of a flexible display spray-printed film according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a parameter of the straightness of the edge of the liquid film in a process flow chart of the method for controlling the straightness of the edge of the flexible display spray-printed film according to the embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
the system comprises an ink jet printing module 1, a motion module 2, an ink jet printing positioning system 21, a motion substrate 22, an observation camera 31, a first light source 32, a positioning camera 33, a second light source 34, a scanning camera 35, a system control module 4, a main controller 41, a liquid film edge straightness calculator 42, a liquid film edge straightness predictor 43, a white light interferometer 44 and a liquid film edge straightness controller 45.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
A method for controlling the edge straightness of a flexible display jet printing film comprises the following steps:
adjusting input parameters and controlling the liquid film to test and print within the effective range of each input parameter for printing so that the thickness of the liquid film meets the requirement of the liquid film; collecting a liquid film edge contour picture for calculating a liquid film edge straightness parameter under the current input parameter, if the straightness parameter does not reach the straightness constraint, correcting the input parameter and continuing to control trial printing until the straightness constraint is reached to obtain an optimal input parameter;
controlling formal printing by adopting the optimal input parameters to finish the edge straightness control of the spray printing film;
wherein the straightness parameters include: amplitude parameter L a Maximum width parameter L z Distance characteristic parameter L sm And a profile length ratio L mr(e) ；L a The arithmetic mean value of the distances between each point on the liquid film edge profile and the datum line is represented; l is z Representing the sum of the maximum peak height and the maximum valley depth from the reference line on the edge profile of the liquid film; l is a radical of an alcohol sm The width average value of a profile unit consisting of all peaks and adjacent valleys on the edge profile of the liquid film is represented; l is mr(e) And the ratio of the sum of the lengths of all intersecting lines after the intersecting of the parallel lines with the distance of e from the reference line and the liquid film edge contour to the sampling length of the liquid film edge contour line is represented.
For better explanation of the present invention, a specific control system will now be given to explain the control method of the present embodiment.
FIG. 1 is a control system for edge straightness of a flexible display jet printing film constructed according to the present invention. As shown in fig. 1, the system includes an inkjet printing module, a motion module, a vision module, and a system control module, each of which will be specifically explained below.
The ink jet printing module 1 is used for generating ink drops with corresponding volume and impact speed according to requirements to be deposited on a moving substrate 22, and flashing multiple ink drops according to the printing area range on the substrate 22 to be deposited on the substrate printing area to form a liquid film.
The motion module 2 includes an inkjet printing positioning system 21 composed of an inkjet printing module 1, a positioning camera 33, a second light source 34, and a motion substrate 22. The head printing and positioning system 21 composed of the head module 1, the positioning camera 33 and the light source 34 can move to a corresponding position to perform printing operation by the main controller 41 after determining the printing position by using the positioning camera 33, and the moving substrate 22 can convey the printed liquid film to a liquid film edge straightness observation area to observe by the main controller 41.
As one of the key improvements of the present invention, the vision module 3 includes an observation camera 31, a first light source 32, a positioning camera 33, a second light source 34, and a scanning camera 35, wherein the observation camera 31 and the first light source 32 are located in an ink droplet observation area, and are used for performing ink droplet observation before the operation of the ink jet printing liquid film, acquiring a flying image when an ink droplet is ejected, feeding back image information to the main controller 41 in real time, observing the flying state, speed, and volume of the ink droplet, and determining the stable state when the ink droplet is ejected; the positioning camera 33 and the second light source 34 are located in the inkjet printing positioning system 21, and the main controller 41 positions the printing position of the nozzle module 1 by using the positioning camera 33; when the moving substrate 22 moves to the liquid film edge observation position, the scanning camera 35 scans and photographs the edge of the liquid film and feeds the obtained straightness information of the edge of the liquid film back to the straightness calculator 42 of the edge of the liquid film.
Furthermore, as another key improvement of the present invention, the system control module 4 includes a main controller 41, a liquid film edge straightness calculator 42, a liquid film edge straightness predictor 43, a white light interferometer 44, and a liquid film edge straightness controller 45, wherein the main controller 41 is used to control the size and impact speed at which the ink drop is ejected in the inkjet printing module 1; for selecting the position of the inkjet printing positioning system 21 in the motion module 2 and controlling the movement of the motion substrate 22; the system is used for acquiring various image information in the visual module and making corresponding judgment; in addition, the system control module 4 comprises a liquid film edge controller 41, the liquid film edge controller 41 extracts liquid film edge related data according to the liquid film edge image acquired by the scanning camera 35 and calculates the liquid film edge related data, and the acquired result is fed back to the main controller 41; the liquid film edge straightness predictor 43 predicts the liquid film edge straightness, obtains the effective range of each input parameter which can enable the liquid film edge straightness to meet the requirement at present, and feeds the range back to the controller 41; the white light interferometer 44 feeds back the whole thickness information of the liquid film to the main controller 41; the liquid film edge straightness controller 45 corrects each input parameter value when the liquid film thickness and the liquid film edge straightness do not meet the standard requirements.
Fig. 2 is a control block diagram of a system and a method for controlling the edge straightness of a flexible display functional layer jet printing preparation film provided by the present invention, which will be explained in further detail below.
The system acts on a trial printing stage before actual printing work begins, firstly, the contour condition of the edge of the liquid film is predicted through the liquid film edge straightness predictor 43 according to the area S of a liquid film printing area, and the obtained effective range of all parameters such as the size R of ink drops, the impact speed v and the distance d between the ink drops is obtained, so that the loss of manpower, financial resources and material resources is avoided; then selecting each input parameter value in each parameter effective range to print; after printing is finished, standing for a period of time, analyzing according to the overall thickness of the liquid film obtained in the white light interferometer 44, and if the film thickness does not meet the requirement, correcting each input parameter value by using the liquid film edge straightness controller 45, and printing again until the film thickness meets the requirement; under the premise that the whole thickness of the liquid film meets the requirement, the edge straightness condition is obtained through the scanning camera 35 and the liquid film edge straightness calculator 42, when the edge straightness of the liquid film does not meet the requirement, the liquid film edge straightness controller 45 is used for correcting each input parameter and printing again until a high-quality liquid film edge contour is obtained, and then the numerical value of each input parameter at the moment is recorded and applied to the actual printing process.
According to a preferred embodiment of the invention, the system is used in a trial printing phase prior to formal printing. According to the range of a printing area, setting the size radius R, the speed v and the spacing d among ink drops ejected during ink-jet printing, after the ink drops are deposited in the printing area to form a liquid film, extracting and calculating information according to the edge new appearance of the liquid film, and firstly extracting the whole thickness information of the liquid film according to a white light interferometer. Let the liquid film thickness at each sampling point be h i The thinnest part of the liquid film is h min The standard parameter of the liquid film thickness is delta, and when the liquid film thickness meets the following formula, the edge thickness of the liquid film can be considered to meet the standard requirement:
Figure BDA0003642915630000091
thereby preventing the liquid film from shrinking to cause the accumulation of the liquid film edge. And on the premise that the thickness of the edge of the liquid film meets the standard requirement, continuously calculating the edge straightness of the liquid film, and when the edge straightness of the liquid film does not meet the standard, continuously modifying the input parameters until the edge straightness of the liquid film meets the standard, and applying the parameter range obtained in the trial printing stage to formal printing.
According to a preferred embodiment of the invention, the liquid film edge data (x) are acquired for the liquid film edge straightness calculator i ,y i ) And then, fitting and obtaining the liquid film edge contour line according to the following formula:
setting the fitted liquid film edge contour curve as L (x), namely:
L(x)＝a 0 +a 1 x+a 2 x 2 +…+a n x n ；
wherein, a 0 ，a 1 ,…,a n To curve fit parameters, the sum of squared errors is now:
Figure BDA0003642915630000101
wherein m is less than or equal to n.
According to the system of normal equations
Figure BDA0003642915630000102
Is obtained by calculation
Figure BDA0003642915630000103
So that the sum of squared errors is minimized, i.e.:
Figure BDA0003642915630000104
at this time, the contour curve L (x) of the liquid film edge can be obtained.
According to a preferred embodiment of the present invention, after obtaining the liquid film edge profile curve, the liquid film edge profile straightness calculator calculates and determines the liquid film edge profile straightness according to the following steps:
(1) determining the edge contour reference line of the liquid film, as shown in fig. 5: the sum of squares of the distances from each point on the edge of the liquid film to the reference line is the minimum, and the reference line can be obtained according to the following formula:
Figure BDA0003642915630000105
wherein L is t The sampling length of the liquid film edge contour line is represented; y is D Indicating the liquid film edge profile datum line.
(2) Calculating the straightness parameter of the edge contour of the liquid film, as shown in FIG. 6: amplitude parameter L a Maximum width parameter L z Distance characteristic parameter L sm And a profile length ratio L mr(e) And (4) four. Amplitude parameter L a An arithmetic mean value representing the absolute values of the distances from the reference line of the points on the liquid film edge profile, as shown in (a) of fig. 6; l is a radical of an alcohol z Represents the sum of the maximum peak height and the maximum valley depth from the reference line on the liquid film edge profile, as shown in (b) in fig. 6; l is si The width of the profile unit is represented by the length of a line segment obtained by intersecting the reference line with the combination of one peak and adjacent valley of the liquid film edge profile, L sm Represents the average value of the widths of profile units consisting of all peaks and adjacent valleys on the edge profile of the liquid film, as shown in (c) of fig. 6; contour length ratio L mr(e) And (d) a ratio of the sum of the lengths of all intersecting line segments after intersecting the liquid film edge contour with a parallel line at a distance e from the reference line to the liquid film edge contour line sampling length, as shown in fig. 6. L is a * 、L z * 、L sm * 、L mr(e) * The calculation is carried out according to the following formulas respectively:
Figure BDA0003642915630000111
L z ＝L p +L v ＝max{L(x)-y D } p +max{L(x)-y D } v
Figure BDA0003642915630000112
Figure BDA0003642915630000113
wherein L is t The sampling length of the liquid film edge contour line is represented; l is p 、L v Respectively representing the maximum peak height and the maximum valley depth from a reference line on the edge profile of the liquid film, wherein a subscript P represents the peak height, and a subscript V represents the valley depth; y is D Representing the contour reference line of the edge of the liquid film; l is si The width of the representative contour unit is the length of a line segment obtained after the combination of one peak and the adjacent valley of the liquid film edge contour is intersected with the datum line; a line parallel to the reference line and spaced from the reference line by a distance e, l (e) representing the length k of the line intersecting the liquid film edge contour i N is the total number of sample points, and m represents the total number of contour elements.
(3) And judging the edge straightness parameters of the liquid film according to the following requirements:
Figure BDA0003642915630000114
wherein L is a * 、L z * 、L sm * 、L mr(e) * Respectively representing the standard requirements of the process on the straightness of the contour of the edge of the liquid film in the actual printing process.
When L is a Smaller, L z Smaller, L si Smaller, L mr(e) The larger the liquid film edge straightness, the more satisfactory the liquid film edge straightness. When the four edge straightness parameters meet the requirements, the parameters input by the system at the moment can be considered to be used in formal printing.
Fig. 3 and fig. 4 are a process flow diagram and a system flow diagram of a system and a method for controlling the edge straightness of a flexible display functional layer jet printing preparation film provided by the invention, and correspondingly, the method comprises the following steps.
Firstly, in a prediction stage, a liquid film edge straightness predictor is utilized to predict the straightness of an edge contour of the liquid film obtained under input parameters at the moment, when the liquid film edge straightness parameters do not meet standard requirements, the input parameters are modified until the liquid film edge straightness parameters all meet the standard requirements, and then all the input parameter values are input into a system control module;
secondly, initializing the whole system in an initialization stage, and inputting parameter values obtained by a liquid film edge predictor into the system;
then, in the stage of ink drop observation and liquid film printing, at the initial moment, the ink drop with a certain volume and impact speed is printed at the ink drop observation position by using the nozzle printing module, the ink drop is observed by using the visual module, when the ink drop ejection state is unstable, the parameters such as air pressure, temperature and the like in an ink path system in the ink jet module are adjusted until the ink drop ejection state is stable, the nozzle printing module is moved to the liquid film printing position by using the motion module, and multiple ink drops are flashed and deposited on the substrate printing area according to the printing area range to form a liquid film;
secondly, in the stage of observing the straightness of the edge of the liquid film, firstly, the liquid film is moved to the observation position of the edge of the liquid film by using the motion module, the appearance of the edge of the liquid film is observed by using the system control module, the overall thickness condition of the liquid film is measured, when the overall thickness of the liquid film does not meet the requirement, the straightness control of the edge of the liquid film is used for correcting the input parameters and repeating the steps until the overall thickness of the edge of the liquid film meets the requirement, so that the excessive accumulation of the edge of the liquid film caused by edge shrinkage is prevented; and when the edge straightness parameter of the liquid film does not meet the requirement, correcting the input parameter by using the edge straightness control of the liquid film, and repeating the steps until the edge straightness parameter of the liquid film meets the requirement.
And finally, after the straightness parameter of the edge of the liquid film meets the requirement, recording the input parameter value at the moment and applying the input parameter value to actual printing operation.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A method for controlling the edge straightness of a flexible display jet printing film is characterized by comprising the following steps:
adjusting input parameters and controlling the liquid film to test and print within the effective range of each input parameter for printing so that the thickness of the liquid film meets the requirement of the liquid film; collecting a liquid film edge contour picture for calculating a liquid film edge straightness parameter under the current input parameter, if the straightness parameter does not reach the straightness constraint, correcting the input parameter and continuing to control trial printing until the straightness constraint is reached to obtain an optimal input parameter;
controlling formal printing by adopting the optimal input parameters to finish the edge straightness control of the spray printing film;
wherein the straightness parameters comprise: amplitude parameter L a Maximum width parameter L z Distance characteristic parameter L sm And a profile length ratio L mr(e) ；L a The arithmetic mean value of the distances between each point on the liquid film edge profile and the datum line is represented; l is z Representing the sum of the maximum peak height and the maximum valley depth from the reference line on the edge profile of the liquid film; l is sm The width average value of a profile unit consisting of all peaks and adjacent valleys on the edge profile of the liquid film is represented; l is mr(e) And the ratio of the sum of the lengths of all the intersecting line segments after the parallel line with the distance of e from the reference line intersects with the liquid film edge contour line to the sampling length of the liquid film edge contour line is expressed.
2. The method for controlling the linearity of the edge of the flexible display jet printing film according to claim 1, wherein the effective range is determined by the following steps:
and (3) performing simulated spray printing based on the area to be printed of the liquid film, and determining the effective range of each input parameter for printing by taking the edge contour straightness of the liquid film as a reference index.
3. The method for controlling the straightness of the edge of the flexible display jet printing film according to claim 1, wherein the implementation manner of calculating the straightness parameter of the edge of the liquid film under the current input parameter is as follows:
based on the edge contour picture of the liquid film, the edge coordinate data (x) of the extracting solution film i ,y i )，x i Abscissa, y, representing the sample point i A vertical coordinate representing a point corresponding to the contour line;
based on the liquid film edge coordinate data (x) i ,y i ) Fitting a liquid film edge contour line function L (x) and determining a datum line of the liquid film edge contour line function L (x);
calculating the edge contour straightness parameters of the liquid film:
Figure FDA0003642915620000021
L z ＝L p +L v ＝max{L(x)-y D } p +max{L(x)-y D } v ；
Figure FDA0003642915620000022
Figure FDA0003642915620000023
wherein L is t The sampling length of the liquid film edge contour line is represented; l is p 、L v Respectively representing the maximum peak height and the maximum valley depth from a reference line on the edge profile of the liquid film, wherein a subscript P represents the peak height, and a subscript V represents the valley depth; y is D Representing the contour reference line of the edge of the liquid film; l is si The width of the representative contour unit is the length of a line segment obtained after the combination of one peak and adjacent valleys of the liquid film edge contour is intersected with the datum line; a line parallel to the reference line and spaced from the reference line by a distance e, l (e) representing the length k of the line intersecting the liquid film edge contour i N is the total number of sample points, and m represents the total number of contour elements.
4. The method for controlling the edge straightness of the flexible display jet printing film according to the claim 3, wherein a polynomial is adopted to fit the liquid film edge contour line function L (x).
5. The method for controlling the linearity of the edge of the flexible display jet printing film according to claim 1, wherein the linearity constraint is as follows:
Figure FDA0003642915620000024
wherein L is a * 、L z * 、L sm * 、L mr(e) * Respectively representing the standard requirements of the process on the straightness of the contour of the edge of the liquid film in the actual printing process.
6. The method for controlling the linearity of the edge of the flexible display jet printing film according to claim 5, wherein when the thickness of the liquid film does not meet the requirement, the adjustment step lengths Δ R, Δ v and Δ d of each input parameter are respectively as follows:
Figure FDA0003642915620000031
Figure FDA0003642915620000032
Figure FDA0003642915620000033
wherein R is 1 、v 1 And d 1 Respectively representing the ink drop radius calibration value, the speed calibration value and the ink drop interval calibration value, and used for correcting the input parameters R, v and d.
When the liquid film edge straightness parameter does not meet the requirement, the adjustment step length delta R, delta v and delta d of each input parameter are respectively as follows:
ΔR＝R a (L a -L a * )+R z (L z -L z * )+R sm (L sm -L sm * )+R mr(e) (L mr(e) -L mr(e) * )；
Δv＝v a (L a -L a * )+v z (L z -L z * )+v sm (L sm -L sm * )+v mr(e) (L mr(e) -L mr(e) * )；
Δd＝d a (L a -L a * )+d z (L z -L z * )+d sm (L sm -L sm * )+d mr(e) (L mr(e) -L mr(e) * )；
wherein L is a * 、L z * 、L sm * 、L mr(e) * Respectively representing the standard requirements of the technology on the straightness of the contour of the edge of the liquid film in the actual printing process; r a 、R z 、R sm 、R mr(e) Representing the calibrated value of the radius of the ink drop; v. of a 、v z 、v sm 、v mr(e) Represents a speed calibration value; d is a radical of a 、d z 、d sm 、d mr(e) Representing the calibrated value of the ink drop distance, and is used for correcting the input parameters R, v and d.
7. A flexible display jet printing film edge straightness control system is characterized by comprising: a vision module and a system control module;
the system control module is used for adjusting input parameters and controlling liquid film trial printing within the effective range of each input parameter for printing so that the thickness of a liquid film meets the requirement of the liquid film;
the vision module is used for collecting a liquid film edge outline picture;
the system control module is also used for calculating the straightness accuracy parameter of the edge of the liquid film under the current input parameter based on the outline picture of the edge of the liquid film, if the straightness accuracy parameter does not reach the straightness accuracy constraint, correcting the input parameter and continuing to control trial printing until the straightness accuracy constraint is reached to obtain the optimal input parameter; controlling formal printing by adopting the optimal input parameters;
wherein the straightness parameters include: amplitude parameter L a Maximum width parameter L z Distance characteristic parameter L sm And a profile length ratio L mr(e) ；L a The arithmetic mean value of the distances between each point on the liquid film edge profile and the datum line is represented; l is z Representing the sum of the maximum peak height and the maximum valley depth from the reference line on the edge profile of the liquid film; l is a radical of an alcohol sm The width average value of a profile unit consisting of all peaks and adjacent valleys on the edge profile of the liquid film is represented; l is mr(e) And the ratio of the sum of the lengths of all the intersecting line segments after the parallel line with the distance of e from the reference line intersects with the liquid film edge contour line to the sampling length of the liquid film edge contour line is expressed.
8. The method as claimed in claim 1, wherein the system control module measures the thickness of the liquid film by using a white light interferometer.
9. The method for controlling the straightness of the edge of the flexible display jet printing film according to claim 1, wherein the vision module scans a contour picture of the edge of the liquid film by using a scanning camera.
10. A computer-readable storage medium, comprising a stored computer program, wherein when the computer program is executed by a processor, the computer program controls a device on which the storage medium is located to execute the method for controlling the linearity of the edge of the flexible display inkjet printing film according to any one of claims 1 to 6.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116100954A (en) * 2023-04-13 2023-05-12 苏州优备精密智能装备股份有限公司 Device and method for guiding ink-jet printing path by measuring edge straightness

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09100183A (en) * 1995-10-06 1997-04-15 Mitsubishi Materials Corp Thick film grazed substrate and its production
CN103688602A (en) * 2011-07-08 2014-03-26 住友重机械工业株式会社 Method for manufacturing substrate and substrate manufacturing device
US20150251416A1 (en) * 2014-03-10 2015-09-10 Canon Kabushiki Kaisha Control device for printing apparatus, control method, and storage medium
CN109927413A (en) * 2017-12-15 2019-06-25 住友重机械工业株式会社 Membrane formation device and film forming method
CN111397539A (en) * 2020-03-28 2020-07-10 华中科技大学 Multi-view visual detection system and method for ink-jet printing
CN113602018A (en) * 2021-07-06 2021-11-05 华中科技大学 Online compensation method and system for missing printing defects of flexible electronic jet printing film
CN113959350A (en) * 2021-11-03 2022-01-21 Tcl华星光电技术有限公司 Ink-jet printing detection system and detection method
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

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09100183A (en) * 1995-10-06 1997-04-15 Mitsubishi Materials Corp Thick film grazed substrate and its production
CN103688602A (en) * 2011-07-08 2014-03-26 住友重机械工业株式会社 Method for manufacturing substrate and substrate manufacturing device
US20150251416A1 (en) * 2014-03-10 2015-09-10 Canon Kabushiki Kaisha Control device for printing apparatus, control method, and storage medium
CN109927413A (en) * 2017-12-15 2019-06-25 住友重机械工业株式会社 Membrane formation device and film forming method
CN111397539A (en) * 2020-03-28 2020-07-10 华中科技大学 Multi-view visual detection system and method for ink-jet 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
CN113602018A (en) * 2021-07-06 2021-11-05 华中科技大学 Online compensation method and system for missing printing defects of flexible electronic jet printing film
CN113959350A (en) * 2021-11-03 2022-01-21 Tcl华星光电技术有限公司 Ink-jet printing detection system and detection method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116100954A (en) * 2023-04-13 2023-05-12 苏州优备精密智能装备股份有限公司 Device and method for guiding ink-jet printing path by measuring edge straightness
CN116100954B (en) * 2023-04-13 2023-06-27 苏州优备精密智能装备股份有限公司 Device and method for guiding ink-jet printing path by measuring edge straightness

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