A method and apparatus for processing edge regions in inkjet printing of film layer structures

Abstract

The application discloses a processing method and equipment related to an edge area in film layer structure inkjet printing, and the processing method comprises the following steps: determining an edge area of a to-be-printed pattern on a substrate bitmap; the to-be-printed pattern comprises an edge area and a non-edge area; dividing the edge area into a plurality of edge subareas, so that an inkjet printer performs film layer structure printing on a plurality of edge subareas of the to-be-printed pattern; wherein the size of the plurality of edge subareas gradually decreases from the edge area to the non-edge area; the size of one edge subarea corresponds to one ink drop extraction rate, the size of the edge subarea is the width of the edge subarea, and the ink drop extraction rate of the edge subarea is the proportion of the ink drop landing points that are prohibited from printing in the total ink drop landing points in the edge subarea. The application can make the edge area of the film layer structure flat and the film thickness uniform.

Description

Technical Field

[0001] This application relates to the field of inkjet printing technology for displays, specifically to a method and apparatus for processing edge regions in inkjet printing of film structures. Background Technology

[0002] Currently, in the structure of OLEDs, the organic light-emitting layer is sandwiched between electrodes. Most of the organic materials in the OLED light-emitting layer are very sensitive to pollutants, O2, and water vapor in the atmosphere. Thin film encapsulation layers can encapsulate OLEDs.

[0003] Furthermore, there are various processes for preparing thin-film encapsulation layers, including screen printing, vapor deposition, and spin coating. Inkjet printing, however, has become the preferred method for preparing thin-film encapsulation layers due to its material savings and ability to be combined with digital control. Two key requirements for thin-film encapsulation in inkjet printing are film thickness and film uniformity; an excessively thin encapsulation layer will result in insufficient water and oxygen barrier properties, while an excessively thick encapsulation layer will waste material and increase the thickness and weight of the light-emitting device.

[0004] However, when inkjet printers spray ink droplets onto a substrate, due to the inherent characteristics of the droplets, they diffuse and create a "dogear" phenomenon at the edges of the film layer. This means that the film thickness is uneven at the edges of the film structure (such as thin-film encapsulation layers, black matrix layers, etc.). Uneven film thickness at the edges leads to an uneven surface of the film structure, which not only affects the film's ability to isolate water and oxygen but also affects light transmittance, potentially causing problems such as color shift or uneven brightness at the screen edges.

[0005] Therefore, there is an urgent need for a method and equipment for processing the edge regions in inkjet printing of film structures to solve the above problems. Summary of the Invention

[0006] This application provides a method and apparatus for processing the edge region in inkjet printing of film structures. The method can make the edge region of the film structure flat and the film thickness uniform.

[0007] The first aspect of this application discloses a method for processing edge regions in inkjet printing of film structures, the method comprising: On the substrate bitmap, the edge region of the pattern to be printed is determined; the pattern to be printed includes edge regions and non-edge regions; The edge region is divided into multiple edge partitions to facilitate the inkjet printer to print film structures on the multiple edge partitions of the pattern to be printed; wherein, from the edge region to the non-edge region, the size of the multiple edge partitions decreases sequentially; one size of the edge partition corresponds to one droplet sampling rate, the size of the edge partition is the width of the edge partition, and the droplet sampling rate of the edge partition is the proportion of ink droplets that are prohibited from printing to the total number of ink droplets in the edge partition.

[0008] In the above scheme, the edge zones can be divided into edge zones, and the width of the edge zones can be set to make the edge areas of the film structure flat and the film thickness uniform. The ink droplet sampling rates in multiple edge zones can be the same or different.

[0009] In one possible implementation, the ink droplet sampling rate of the plurality of edge partitions decreases sequentially from the edge region to the non-edge region.

[0010] In the above scheme, the edge region can be divided into edge partitions, and the width of the edge partitions corresponds to the ink droplet sampling rate. The closer the edge partition is to the outer contour of the edge region, the wider it is and the higher the sampling rate; the closer the edge partition is to the inner part of the edge region, the narrower it is and the lower the sampling rate. This ensures that after inkjet printing, the film thickness in the edge region of the product printing area (the area on the substrate corresponding to the pattern to be printed) in the substrate is smooth. Of course, smooth film thickness in the edge region does not mean that the film thickness in the non-edge area of ​​the product printing area is completely consistent with that in the edge area; rather, it means that the film thickness in the edge region does not have a "dogear" phenomenon, the film thickness in the edge region is smooth, and the film thickness is within the allowable error range.

[0011] Furthermore, the width of the edge partition corresponds to the ink droplet extraction rate, and together they adjust the film thickness of the edge partition. This can also be set to an empirical value.

[0012] In one possible implementation, determining the edge region of the pattern to be printed on the substrate bitmap specifically includes: binarizing the pattern to be printed to obtain a binarized image; the binarized image includes multiple rows and columns of pixels; determining the edge region of the pattern to be printed in the binarized image in a preset manner; wherein, the preset manner is to rotate an axis of a preset size around a search point at any angle; the search point is any pixel in the binarized image, and the preset size is determined by the actual size of the product edge on the substrate and the pixel size in the binarized image.

[0013] The above scheme aims to illustrate how to determine the edge regions and their dimensions within the pattern to be printed. The dimensions of the edge regions are mapped from the actual dimensions of the product edges onto the binarized image, and these actual dimensions are empirical values ​​determined by the film thickness and ink properties. A coordinate system can be constructed at the vertices of the binarized image, with search points having X and Y axes, facilitating the search for edge regions.

[0014] Furthermore, the search order for search points can start from the first row of the binarized image and proceed to the last row, or from the first column of each row and proceed to the last column. It should be noted that arbitrary angle rotation is crucial; if the X and Y axes are rotated by only a few angles, misidentification of edge regions may occur, especially when the edge regions are circular or other curved shapes.

[0015] In one possible implementation, the edge region of the pattern to be printed is determined in the binarized image in a preset manner; specifically, if the binarized attribute value of a pixel through which the axis of the search point passes is 1, then the position of the search point is an edge region; if the binarized attribute value of all pixels through which the axis of the search point passes is 0, then the position of the search point is a non-edge region; wherein, the axis of the search point includes the X-axis and the Y-axis.

[0016] The above scheme aims to illustrate the specific method by which search points determine edge and non-edge regions. In the binarized image, the binarized attribute value of pixels at the planned ink droplet landing points in the pattern to be printed is 0, while the binarized attribute value of pixels at the ink droplet landing points where printing is prohibited is 1. At this time, the size of the edge region is searched using the X and Y axes. When the search point rotates along the X or Y axis, if any pixel whose binarized attribute value is 1 is passed through, the search point is considered an edge region; only pixels whose binarized attribute value is 0 when passed through the X or Y axis are considered non-edge regions.

[0017] In one possible implementation, the edge region is the outer contour edge of the pattern to be printed; the plurality of edge partitions include a first edge partition and a second edge partition, wherein the first edge partition is located at the outer contour edge of the edge region and the second edge partition is located at the inner contour edge of the edge region; After dividing the edge region into multiple edge partitions, the method further includes: obtaining the actual printing size of the product on the substrate, wherein the actual printing size is the product size obtained by printing on the substrate with the pattern to be printed as the ink droplet configuration pattern of the inkjet printer; if the actual size is larger than the standard product size, then adding a third edge partition to the pattern to be printed, so that the pattern to be printed performs a first shrinkage operation; wherein the sampling rate of the third edge partition is 100%, and the position of the third edge partition is the position of the first edge partition; adjusting the width of the third edge partition until the actual size obtained after the pattern to be printed performs the first shrinkage operation is equal to the standard product size.

[0018] The above solution aims to address the issue of edge areas located at the outer contour edge of the pattern to be printed, where the actual printed size is larger than the standard product size. The first shrinkage operation involves adding a third edge partition, a blank partition with a 0% ink droplet coverage rate, to replace the previous first edge partition. The previous first and second edge partitions are shrunk inwards (the positions of the first and second edge partitions are moved inwards towards the inside of the pattern to be printed). At this time, the width of each previous edge partition remains unchanged, and the shrinkage reduces the ink droplet coverage area. In other words, by adding a blank edge partition, the size of the pattern to be printed is reduced, and the final actual size is equal to the standard product size; the width of this blank edge partition is easily adjustable.

[0019] In one possible implementation, the method further includes: if the actual size is smaller than the standard product size, adding a fourth edge partition to the pattern to be printed to cause the pattern to be printed to perform a first outward expansion operation; wherein the sampling rate of the fourth edge partition is 0%, and the position of the fourth edge partition is the position of the second edge partition in the pattern to be printed; adjusting the width of the fourth edge partition until the actual size obtained after the pattern to be printed performs the first outward expansion operation is equal to the standard product size.

[0020] The above solution aims to address the issue of edge regions located at the outer contour edge having actual printed sizes smaller than standard product sizes. The first expansion operation involves adding a fourth edge partition with a 100% ink droplet coverage area, replacing the previous second edge partition. This expands the previous edge partitions (moving the positions of the first and second edge partitions outwards from the printed pattern), while maintaining the width of the previous edge partitions. The expansion adds an ink droplet coverage area. In other words, by adding an edge partition entirely composed of ink droplets, the size of the printed pattern is enlarged, resulting in an actual size equal to the standard product size. The width of this edge partition, entirely composed of ink droplets, is easily adjustable.

[0021] In one possible implementation, the edge region is the inner contour edge of the pattern to be printed; the plurality of edge partitions include a fifth edge partition and a sixth edge partition, the fifth edge partition being located at the outer contour edge of the edge region, and the sixth edge partition being located at the inner contour edge of the edge region; After dividing the edge region into multiple edge partitions, the method further includes: obtaining the actual printing size of the product on the substrate, wherein the actual printing size is the product size obtained by printing on the substrate with the pattern to be printed as the ink droplet configuration pattern of the inkjet printer; if the actual size is larger than the standard product size, then adding a seventh edge partition to the pattern to be printed, so that the pattern to be printed performs a second shrinkage operation; wherein the sampling rate of the seventh edge partition is 100%, and the position of the seventh edge partition is the position of the fifth edge partition; adjusting the width of the seventh edge partition until the actual size obtained after the pattern to be printed performs the shrinkage operation is equal to the standard product size.

[0022] In the above solution, the issue of the actual size being larger than the standard product size is addressed for the edge region located within the inner contour of the pattern to be printed. The second shrinkage operation is essentially the same as the first shrinkage operation; however, the second shrinkage operation adds a blank partition inside the product, increasing the number of non-printable pixels inside the product. In other words, by adding a blank edge partition inside the pattern to be printed, the size of the pattern is reduced.

[0023] In one possible implementation, the method further includes: if the actual size is smaller than the standard product size, adding an eighth edge partition to the pattern to be printed to cause the pattern to be printed to perform a second outward expansion operation; wherein the sampling rate of the eighth edge partition is 0%, and the position of the eighth edge partition is the position of the sixth edge partition in the pattern to be printed; adjusting the width of the eighth edge partition until the actual size obtained after the pattern to be printed performs the second outward expansion operation is equal to the standard product size.

[0024] In the above solution, the issue of the actual size being smaller than the standard product size is addressed for the edge region located within the inner contour of the pattern to be printed. The second expansion operation is essentially the same as the first expansion operation, but for the second outer shell operation, it reduces the blank partitions inside the product, thus reducing the number of non-printable pixels inside the product. In other words, the size of the pattern to be printed is increased by adding an edge partition inside the pattern that consists entirely of ink droplet landing points.

[0025] In one possible implementation, the shapes of the inner and outer contour edges of the pattern to be printed include circles, rectangles, squares, elongated rectangles, and "capsule" shapes.

[0026] At this point, there are no restrictions on the shape of the inner and outer contour edges of the pattern to be printed.

[0027] In one possible implementation, the method further includes: after printing the film structure on the substrate, obtaining the film thickness of the edge region; if the film thickness of the edge region has a "recess", then confirming the position of the "recess" in the edge region in the substrate; in the substrate bitmap, reducing the sampling rate of the ninth edge partition until the film thickness of the edge region does not have a "recess"; wherein the ninth edge partition is the position corresponding to the position of the "recess" in the edge region on the substrate.

[0028] In the above scheme, the film thickness can be obtained using a profilometer; the "recess" originates from the recesses of the substrate itself, and the "protrusion" mentioned below may also refer to the protrusions of the substrate itself. Therefore, after the inkjet printer prints the film structure, the film thickness of the edge zones may still have unevenness. The "recess" can be adjusted by reducing the sampling rate of the edge zones.

[0029] In one possible implementation, the location of the "recess" in the edge region is confirmed; specifically, this includes: determining the distance between the "recess" location in the product printing area and the center of the product printing area using a camera; the substrate includes multiple product printing areas, and one pattern to be printed corresponds to multiple product printing areas; the location of the "recess" in the edge region is determined based on the distance.

[0030] In the above solution, the location of the "recess" is mapped onto the substrate bitmap. Generally, the "recesses" are distributed in a ring shape within the product printing area; that is, the "recesses" are ring-shaped in the pattern to be printed. Therefore, it is only necessary to obtain the distance between the location of the "recess" and the center of the product printing area to determine the location of the "recess," and thus determine the location of the "recess" in the pattern to be printed. The location of the "protrusion" in the following text is obtained in the same way.

[0031] In one possible implementation, the method further includes: after printing the film structure on the substrate, obtaining the film thickness of the edge region; if there is a "protrusion" in the film thickness of the edge region, confirming the position of the "protrusion" in the edge region in the substrate; increasing the sampling rate of the tenth edge partition in the substrate bitmap until there is no "protrusion" in the film thickness of the edge region; wherein the tenth edge partition is the position corresponding to the position of the "protrusion" in the edge region on the substrate.

[0032] In the above scheme, the thickness of the film can be reduced by increasing the sampling rate of the edge partition to reduce the number of ink droplets falling at the "protrusion" position.

[0033] A second aspect of this application discloses a processing device for edge regions in inkjet printing of film structures. The processing device includes a processor, a memory, a user interface, and a network interface. The memory stores instructions, the user interface and network interface are used for communication with other devices, and the processor executes the instructions stored in the memory to cause the processing device to perform the following instructions: On the substrate bitmap, the edge region of the pattern to be printed is determined; the pattern to be printed includes edge regions and non-edge regions; the edge region is divided into multiple edge partitions to facilitate the inkjet printer to print film structure on the multiple edge partitions of the pattern to be printed; wherein, from the edge region to the non-edge region, the size of the multiple edge partitions decreases sequentially; the size of one edge partition corresponds to one ink droplet sampling rate, the size of the edge partition is the width of the edge partition, and the ink droplet sampling rate of the edge partition is the proportion of ink droplets that are prohibited from printing to the total number of ink droplets in the edge partition.

[0034] The beneficial effects of this application include: By dividing the edge region into multiple edge regions and setting the width of each edge region, the edge areas of the film structure can be made smooth and the film thickness uniform. The droplet sampling rate in multiple edge regions can be the same or different. By dividing the edge region into edge partitions, with the width of each partition corresponding to the ink droplet extraction rate, the edge partitions closer to the outer contour of the edge region have a larger width and a higher extraction rate; conversely, the edge partitions closer to the inner edge region have a smaller width and a lower extraction rate. This ensures that after inkjet printing, the edge region film thickness of the printed product area (the area on the substrate corresponding to the printed pattern) on the substrate is smooth. However, smooth edge region film thickness does not mean that the film thickness in the non-edge area of ​​the printed product area is completely consistent with the edge area; rather, it means that the film thickness in the edge region does not exhibit a "dogear" effect, the film thickness is smooth, and the film thickness is within the allowable error range. This section explains how to determine the edge regions and their dimensions within a pattern to be printed. The edge region dimensions are mapped from the actual dimensions of the product edges onto a binary image. The actual dimensions of the product edges are empirical values ​​determined by the film thickness and ink properties. A coordinate system can be constructed at the vertices of the binary image, with search points having X and Y axes, facilitating the search for edge regions. The search order for search points can start from the first row of the binarized image and proceed to the last row, or from the first column of each row and proceed to the last column. It should be noted that arbitrary angle rotation is crucial. If the X and Y axes are rotated by only a few angles, misidentification of edge regions may occur, especially when the edge regions are circular or other curved shapes. This section explains the specific method used to determine edge and non-edge regions using search points. In the binarized image, the binarized attribute value of pixels at the planned ink droplet landing points in the pattern to be printed is 0, while the binarized attribute value of pixels at the ink droplet landing points where printing is prohibited is 1. At this point, the size of the edge region is searched using the X and Y axes. When the search point rotates along the X or Y axis, if any pixel whose binarized attribute value is 1 is passed through, the search point is considered an edge region; only pixels whose binarized attribute value is 0 when passed through the X or Y axis are considered non-edge regions.

[0035] This addresses the issue of edge areas in the printable pattern, located at the outer contour edge, where the actual print size exceeds the standard product size. The first shrinkage operation involves adding a third edge partition—a blank partition with a 0% ink droplet coverage rate—to replace the previous first edge partition. This shrinks the previous edge partitions (including the first edge partition) while maintaining their original widths, reducing the ink droplet coverage area. In other words, by adding a blank edge partition, the size of the printable pattern is reduced, resulting in an actual size equal to the standard product size. The width of this blank edge partition is easily adjustable. This addresses the issue of edge regions located at the outer contour edge having a printed size smaller than the standard product size. The first expansion operation involves adding a fourth edge partition with a 100% ink droplet coverage, replacing the previous second edge partition. This expands the previous edge partitions (including the second edge partition) outwards, while maintaining the width of each previous edge partition, thus adding an ink droplet coverage area. In other words, by adding an edge partition entirely composed of ink droplets, the size of the printed pattern is enlarged, resulting in an actual size equal to the standard product size. The width of this edge partition, entirely composed of ink droplets, is easily adjustable. For the edge region located within the inner contour of the pattern to be printed, this addresses the issue of the actual size being larger than the standard product size. The second shrinkage operation is essentially the same as the first shrinkage operation; however, the second shrinkage operation adds a blank partition inside the product, increasing the number of unprintable pixels within the product. In other words, by adding a blank edge partition inside the pattern to be printed, the size of the pattern is reduced. For the edge region located within the inner contour of the pattern to be printed, this addresses the issue of the actual size being smaller than the standard product size. The second expansion operation is essentially the same as the first expansion operation, but for the second outer shell operation, it reduces the blank partitions inside the product, thus reducing the number of unprintable pixels inside the product. In other words, by adding an edge partition entirely composed of ink droplet landing points inside the pattern to be printed, the size of the pattern to be printed is increased. The thickness of the film can be reduced by increasing the sampling rate of the edge partition to reduce the number of ink droplets falling at the "protruding" location. Attached Figure Description

[0036] Figure 1 This is a schematic flowchart of a method for processing edge regions in inkjet printing of film structures disclosed in this application. Figure 2 This is a schematic diagram of an edge region search algorithm in a substrate bitmap disclosed in this application specification; Figure 3 This is a schematic diagram of an edge partitioning structure in a substrate bitmap disclosed in this application specification; Figure 4 This is a schematic diagram of another edge partitioning structure in a substrate bitmap disclosed in this application. Figure 5a This application discloses a schematic diagram illustrating the principle of inward and outward expansion of the inner contour edge of a product; Figure 5b This is a schematic diagram illustrating the principle of inward and outward contraction of the outer contour edge of another product disclosed in this application. Figure 6 This is a schematic diagram of a device for processing edge regions in inkjet printing of film structures, as disclosed in this application specification. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0038] In the description of the embodiments of this application, the words "for example" or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design that is described as "for example" or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Rather, the use of the words "for example" or "for instance" is intended to present the relevant concepts in a specific manner.

[0039] In the description of the embodiments of this application, the term "multiple" means two or more. For example, multiple systems means two or more systems, and multiple screen terminals means two or more screen terminals. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0040] This specification discloses a method for processing edge regions in inkjet printing of film structures. For example... Figure 1 As shown, the processing method includes steps S101-S102.

[0041] S101. On the substrate bitmap, determine the edge region of the pattern to be printed; the pattern to be printed includes edge regions and non-edge regions.

[0042] S102. The edge region is divided into multiple edge partitions to facilitate the inkjet printer to print the film structure of the multiple edge partitions of the pattern to be printed; wherein, from the edge region to the non-edge region, the size of the multiple edge partitions decreases sequentially; the size of one edge partition corresponds to one ink droplet sampling rate, the size of the edge partition is the width of the edge partition, and the ink droplet sampling rate of the edge partition is the proportion of ink droplets that are prohibited from printing to the total number of ink droplets in the edge partition.

[0043] At this point, by dividing the edge zone into multiple edge zones and setting the width of each edge zone, the edge areas of the film structure can be made smooth and the film thickness uniform. The droplet sampling rates in multiple edge zones can be the same or different.

[0044] In one example, the ink droplet sampling rate of the multiple edge partitions decreases sequentially from the edge region to the non-edge region.

[0045] In the example above, by dividing the edge region into edge partitions, and the width of the edge partitions corresponding to the ink droplet sampling rate; the closer the edge partition is to the outer contour of the edge region, the larger its width and the higher its sampling rate; the closer the edge partition is to the inner side of the edge region, the smaller its width and the lower its sampling rate; this makes the film thickness of the edge region of the product printing area (the area on the substrate corresponding to the pattern to be printed) in the substrate smooth after the inkjet printer prints.

[0046] In the example above: from the edge region to the non-edge region, the sizes of the multiple edge partitions decrease sequentially, and the ink droplet sampling rate of the multiple edge partitions decreases sequentially; there are two cases. One case is the inner contour of the pattern to be printed, and the other is the outer contour of the pattern to be printed. For example... Figure 3 As shown, the outer contour of the pattern to be printed is square. Figure 3 The image shown is a rectangle, and its inner contour is a curve. Figure 3 (As shown in the diagram, it is a circle). The direction from the edge region to the non-edge region in the outer contour is the direction from edge partition 203a to edge partition 202a, and then to edge partition 201a; the sizes of the multiple edge partitions decrease sequentially, and the droplet sampling rates of the multiple edge partitions decrease sequentially, that is, the width of 203a is greater than the width of 202a, the width of 202a is greater than the width of 201a, and the sampling rate of 203a is greater than the sampling rate of 202a, and the sampling rate of 202a is greater than the sampling rate of 201a; for example... Figure 3 As shown, the higher the droplet sampling rate of an edge partition, the lower its droplet drop rate. Similarly, for the inner contour, in the direction from the edge region to the non-edge region, i.e., from edge partition 203b to edge partition 202b, and then to edge partition 201b, the sizes of the multiple edge partitions decrease sequentially, and the droplet sampling rates of the multiple edge partitions decrease sequentially. That is, the width of 203b is greater than the width of 202b, the width of 202b is greater than the width of 201b, and the droplet sampling rate of 203b is greater than the droplet sampling rate of 202b, and the droplet sampling rate of 202b is greater than the droplet sampling rate of 201b.

[0047] This instruction manual does not impose any restrictions on the shape of the outer and inner contours of the pattern to be printed. For example... Figure 4 As shown, Figure 4 The diagram shows an outer circle and an inner square. Similarly, within the outer contour, the sampling rate and width of 303a are greater than those of 302a, and the sampling rate and width of 302a are greater than those of 301a. Within the inner contour, the sampling rate and width of 303b are greater than those of 302b, and the sampling rate and width of 302b are greater than those of 301b. It should be noted that the number of edge partitions in this specification is not limited; the accompanying drawings illustrate three edge partitions. The specific width of each edge partition is closely related to and corresponds to the ink droplet sampling rate; a determined width of an edge partition means a determined ink droplet sampling rate.

[0048] The aforementioned smooth film thickness in the edge area does not mean that the film thickness in the non-edge area and the edge area of ​​the product printing area is completely consistent; rather, it means that the film thickness in the edge area does not have a "dogear" phenomenon, the film thickness in the edge area is smooth, and the film thickness is within the allowable error range.

[0049] Furthermore, the width of the edge partition corresponds to the ink droplet extraction rate, and together they adjust the film thickness of the edge partition. This can also be set to an empirical value.

[0050] In one example, determining the edge region of the pattern to be printed on the substrate bitmap specifically includes: binarizing the pattern to be printed to obtain a binarized image; the binarized image includes multiple rows and columns of pixels; determining the edge region of the pattern to be printed in the binarized image in a preset manner; wherein, the preset manner is to rotate an axis of a preset size around a search point at any angle; the search point is any pixel in the binarized image, and the preset size is determined by the actual size of the product edge on the substrate and the pixel size in the binarized image.

[0051] The example above illustrates how to determine edge regions and their dimensions within a pattern to be printed. The dimensions of the edge regions are mapped from the actual dimensions of the product edges onto a binarized image; these actual dimensions are empirical values ​​determined by the film thickness and ink properties. A coordinate system can be constructed at the vertices of the binarized image, with search points having X and Y axes, facilitating the search for edge regions.

[0052] Furthermore, the search order for search points can start from the first row of the binarized image and proceed to the last row, or from the first column of each row and proceed to the last column. It should be noted that arbitrary angle rotation is crucial; if the X and Y axes are rotated by only a few angles, misidentification of edge regions may occur, especially when the edge regions are circular or other curved shapes.

[0053] The above search example is as follows Figure 2 As shown; Figure 2 The image is a local image after binarization. The black box (binarization attribute value of 0) is the planned area for ink droplet landing points in inkjet printing, and the white box (binarization attribute value of 1) is the prohibited area for ink droplet landing points in inkjet printing. Figure 2 The position of 0 represents the search point. The distance between 3 or 7 on the X-axis and 0 is the length of the X-axis axis. The distance between 1 or 5 on the Y-axis and 0 is the length of the Y-axis axis. The positions of 2, 8, 6, and 4 represent the positions of the axes after rotation around the search point. The X-axis and Y-axis axes can be the same length or different lengths. Figure 2 The X-axis and Y-axis shown have different lengths. The length of the Y-axis (pixel size) = the physical size of the Y-axis / the average spacing between the Y-axis pixels, and the length of the X-axis (pixel size) = the physical size of the X-axis / the average spacing between the X-axis pixels. Figure 2The position of 8 is the edge determined after rotating the axis of the search point, and it can also determine the distance between 8 and 0. The coordinate system of the substrate bitmap is based on the upper left corner as the origin. The coordinates of the search point are known. In the coordinate system constructed with the search point as the origin, the coordinates of the search point need to be transformed to the coordinate system of the substrate bitmap.

[0054] For example: Assume the pixel pitch of X = 10 μm and the pixel pitch of Y = 17.5 μm. The preset physical size of the edge region, i.e., the edge search length, is 70 μm. Then, the edge search length is converted from physical length to pixel length: X-axis length = 70 / 10 = 7 pixels, Y-axis length = 70 / 17.5 = 4 pixels. That is... Figure 2 The major axis is 2*7 pixels long, and the minor axis is 2*4 pixels long. X=a*cos(θ), Y=b*sin(θ); where a is the radius in the X-axis direction, b is the radius in the Y-axis direction, and θ is the rotation angle.

[0055] Assuming point "0" is the current edge search point with coordinates (0,0), rotating the major and minor axes by different angles yields different edge judgment points: 0 degrees results in point 3 (7,0); 45 degrees in point 2 (4.9,2.8), rounded down to (5,3); 90 degrees in point 1 (0,4); 135 degrees in point 8 (-4.9,2.8), rounded down to (-5,3); 180 degrees in point 7 (-7,0); -45 degrees in point 4 (4.9,-2.8), rounded down to (5,-3); -90 degrees in point 5 (0,-4); and -135 degrees in point 6 (-4.9,-2.8), rounded down to (-5,-3). Judging from point 8, we know that the current search point 0 is within the edge region. Furthermore, the greater the rotation angle, the more accurate the search.

[0056] In one example, the edge region of the pattern to be printed is determined in the binarized image in a preset manner; specifically, if the binarized attribute value of a pixel through which the axis of the search point passes is 1, then the position of the search point is an edge region; if the binarized attribute value of all pixels through which the axis of the search point passes is 0, then the position of the search point is a non-edge region; wherein, the axis of the search point includes the X-axis and the Y-axis.

[0057] The above example illustrates the specific method by which search points determine edge and non-edge regions. In the binarized image, the binarized attribute value of pixels at the planned ink droplet landing points in the pattern to be printed is 0, while the binarized attribute value of pixels at the ink droplet landing points where printing is prohibited is 1. In this case, the size of the edge region is searched using the X and Y axes. When the search point rotates along the X or Y axis, if any pixel whose binarized attribute value is 1 is passed through, the search point is considered an edge region; only pixels whose binarized attribute value is 0 when passed through the X or Y axis are considered non-edge regions.

[0058] It should be noted that the determination of the binary attribute values ​​of pixels along the axis involves two methods. Both methods assume that the binary pixel value of the search point is 0. If the binary pixel value of the search point is 1, then the search point is directly considered a non-edge region. One method uses the binary value of pixels at the vertices of the axis, and the other uses the binary value of pixels swept by the axis during rotation. Determining the value at the vertices of the axis is relatively simple and computationally inefficient; determining the value of pixels swept by the axis during rotation is more efficient, as the result can be obtained during the rotation process. Both methods can be used, and there is no limitation on which one is preferred.

[0059] In one example, the edge region is the outer contour edge of the pattern to be printed; the plurality of edge partitions include a first edge partition and a second edge partition, wherein the first edge partition is located at the outer contour edge of the edge region and the second edge partition is located at the inner contour edge of the edge region; After dividing the edge region into multiple edge partitions, the method further includes: obtaining the actual printing size of the product on the substrate, wherein the actual printing size is the product size obtained by printing on the substrate with the pattern to be printed as the ink droplet configuration pattern of the inkjet printer; if the actual size is larger than the standard product size, then adding a third edge partition to the pattern to be printed, so that the pattern to be printed performs a first shrinkage operation; wherein the sampling rate of the third edge partition is 100%, and the position of the third edge partition is the position of the first edge partition; adjusting the width of the third edge partition until the actual size obtained after the pattern to be printed performs the first shrinkage operation is equal to the standard product size.

[0060] In the example above, the aim is to address the issue of the edge region located at the outer contour edge of the pattern to be printed, where the actual printed size is larger than the standard product size. The first shrinkage operation involves adding a third edge partition, a blank partition with a 0% ink droplet coverage rate, to replace the previous first edge partition. This shrinks the previous edge partitions (including the first edge partition), while maintaining the width of each previous edge partition. The shrinkage reduces the ink droplet coverage area. In other words, by adding a blank edge partition, the size of the pattern to be printed is reduced, resulting in an actual size equal to the standard product size. The width of this blank edge partition is easily adjustable.

[0061] like Figure 5b The diagram illustrates the inward and outward expansion of the outer contour. For the inward expansion operation, the third edge partition 502b is an edge partition with a sampling rate of 100%; the position of the third edge partition 502b is the location of the outermost edge partition among the previous edge partitions, and its size can be adjusted as needed. For the outward expansion operation, the position of the fourth edge partition 502a is the location of the innermost edge partition among the previous edge partitions, and its size can also be adjusted as needed. It should be noted that... Figure 5b For ease of illustration, the sampling rate in the third edge partition 502b is not 100% (if the sampling rate were 100%). Figure 5b The third edge partition cannot be displayed in the image (it is integrated with the prohibited printing area); this is only for illustration purposes. During the indentation operation, the sampling rate of the third edge partition is 100%, meaning it is a blank partition with a 0% ink droplet rate. Similarly, for ease of illustration, the sampling rate in the fourth edge partition 502a is not 0% (if the sampling rate were 0%). Figure 5b The fourth edge partition cannot be displayed in the image (i.e., it is integrated with the non-edge partitions), this is only for illustration; in the expansion operation, the sampling rate of the fourth edge partition is 0%, that is, the partition with a 100% ink droplet rate.

[0062] In one example, the method further includes: if the actual size is smaller than the standard product size, adding a fourth edge partition to the pattern to be printed to cause the pattern to be printed to perform a first outward expansion operation; wherein the sampling rate of the fourth edge partition is 0%, and the position of the fourth edge partition is the position of the second edge partition in the pattern to be printed; adjusting the width of the fourth edge partition until the actual size obtained after the pattern to be printed performs the first outward expansion operation is equal to the standard product size.

[0063] In the example above, the aim is to address the issue of edge regions located at the outer contour edge having an actual printed size smaller than the standard product size. The first expansion operation involves adding a fourth edge partition with a 100% ink droplet coverage, replacing the previous second edge partition. This expands the previous edge partitions (including the second edge partition) outwards, while maintaining the width of each previous edge partition, thus adding an ink droplet coverage area. In other words, by adding an edge partition entirely composed of ink droplets, the size of the pattern to be printed is increased, resulting in an actual size equal to the standard product size. The width of this edge partition, entirely composed of ink droplets, is easily adjustable.

[0064] In one example, the edge region is the inner contour edge of the pattern to be printed; the plurality of edge partitions include a fifth edge partition and a sixth edge partition, the fifth edge partition being located at the outer contour edge of the edge region, and the sixth edge partition being located at the inner contour edge of the edge region; After dividing the edge region into multiple edge partitions, the method further includes: obtaining the actual printing size of the product on the substrate, wherein the actual printing size is the product size obtained by printing on the substrate with the pattern to be printed as the ink droplet configuration pattern of the inkjet printer; if the actual size is larger than the standard product size, then adding a seventh edge partition to the pattern to be printed, so that the pattern to be printed performs a second shrinkage operation; wherein the sampling rate of the seventh edge partition is 100%, and the position of the seventh edge partition is the position of the fifth edge partition; adjusting the width of the seventh edge partition until the actual size obtained after the pattern to be printed performs the shrinkage operation is equal to the standard product size.

[0065] In the example above, the issue of the actual size being larger than the standard product size is addressed for the edge region located within the inner contour of the pattern to be printed. The second shrinkage operation is essentially the same as the first shrinkage operation; however, the second shrinkage operation adds a blank partition inside the product, increasing the number of unprintable pixels inside the product. In other words, by adding a blank edge partition inside the pattern to be printed, the size of the pattern to be printed is reduced.

[0066] like Figure 5a The diagram illustrates the inward and outward expansion of the inner contour. For the inward expansion operation, the seventh edge partition 501b is an edge partition with a sampling rate of 100%; the position of the seventh edge partition 501b is the location of the outermost edge partition among the previous edge partitions, and its size can be adjusted as needed. For the outward expansion operation, the position of the eighth edge partition 501a is the location of the innermost edge partition among the previous edge partitions, and its size can also be adjusted as needed. It should be noted that... Figure 5aFor ease of illustration, the sampling rate in the seventh edge partition 501b is not 100% (if the sampling rate were 100%). Figure 5a The seventh edge partition cannot be displayed in the image (it is integrated with the prohibited printing area); this is only for illustration purposes. During the indentation operation, the sampling rate of the seventh edge partition is 100%, meaning it is a blank partition with a 0% ink droplet rate. Similarly, for ease of illustration, the sampling rate in the eighth edge partition 501a is not 0% (if the sampling rate were 0%). Figure 5a The eighth edge partition cannot be displayed in the image (i.e., it is integrated with the non-edge partitions), this is only for illustration; in the expansion operation, the sampling rate of the eighth edge partition is 0%, that is, the partition with a 100% ink droplet rate.

[0067] In one example, the method further includes: if the actual size is smaller than the standard product size, adding an eighth edge partition to the pattern to be printed to cause the pattern to be printed to perform a second outward expansion operation; wherein the sampling rate of the eighth edge partition is 0%, and the position of the eighth edge partition is the position of the sixth edge partition in the pattern to be printed; adjusting the width of the eighth edge partition until the actual size obtained after the pattern to be printed performs the second outward expansion operation is equal to the standard product size.

[0068] In the above example, the issue of the actual size being smaller than the standard product size is addressed for the edge region located within the inner contour of the pattern to be printed. The second expansion operation is essentially the same as the first expansion operation, but the second expansion operation reduces the blank partitions inside the product, thus reducing the number of unprintable pixels inside the product. In other words, the size of the pattern to be printed is increased by adding an edge partition entirely composed of ink droplets inside the pattern to be printed.

[0069] In one example, the shapes of the inner and outer contour edges of the pattern to be printed include circles, rectangles, squares, elongated rectangles, and "capsule" shapes.

[0070] At this point, there are no restrictions on the shapes of the inner and outer contour edges of the pattern to be printed. For example... Figure 3 As shown, Figure 3 The outer contour is square, and the inner contour is circular; Figure 4 The outer contour is circular, and the inner contour is square; Figure 5a The outer contour is square, and the inner contour is "capsule" shaped; Figure 5b The outer and middle outlines are circular.

[0071] In one example, the method further includes: after printing the film structure on the substrate, obtaining the film thickness of the edge region; if the film thickness of the edge region has a "recess", then confirming the position of the "recess" in the edge region in the substrate; in the substrate bitmap, reducing the sampling rate of the ninth edge partition until the film thickness of the edge region does not have a "recess"; wherein, the ninth edge partition is the position corresponding to the position of the "recess" in the edge region on the substrate.

[0072] In the example above, the film thickness can be obtained using a profilometer; the "recess" originates from the recesses of the substrate itself, and the "protrusion" mentioned below may also refer to the protrusions of the substrate itself. Therefore, after the inkjet printer prints the film structure, the film thickness of the edge zones may still have unevenness. The "recess" can be adjusted by reducing the sampling rate of the edge zones.

[0073] In one example, the location of the "recess" in the edge region is confirmed; specifically, this includes: determining the distance between the "recess" location in the product printing area and the center of the product printing area using a camera; the substrate includes multiple product printing areas, and one pattern to be printed corresponds to multiple product printing areas; the location of the "recess" in the edge region is determined based on the distance.

[0074] In the example above, the location of the "recess" is mapped onto the substrate bitmap. Generally, the "recesses" are distributed in a ring shape within the product printing area; that is, the "recesses" are arranged in a ring shape within the pattern to be printed. Therefore, it is only necessary to obtain the distance between the location of the "recess" and the center of the product printing area to determine the location of the "recess," and thus, to locate the "recess" within the pattern to be printed. The location of the "protrusion" in the following text is determined in the same way.

[0075] In one example, the method further includes: after printing the film structure on the substrate, obtaining the film thickness of the edge region; if there is a "protrusion" in the film thickness of the edge region, confirming the position of the "protrusion" in the edge region in the substrate; increasing the sampling rate of the tenth edge partition in the substrate bitmap until there is no "protrusion" in the film thickness of the edge region; wherein, the tenth edge partition is the position corresponding to the position of the "protrusion" in the edge region on the substrate.

[0076] In the example above, the thickness of the film can be reduced by increasing the sampling rate of the edge partition to reduce the number of ink droplets falling at the "protrusion" location.

[0077] This specification discloses a processing device for edge regions in inkjet printing of film structures. The processing device includes a processor, a memory, a user interface, and a network interface. The memory stores instructions, the user interface and network interface are used for communication with other devices, and the processor executes the instructions stored in the memory to cause the processing device to perform the following instructions: On the substrate bitmap, the edge region of the pattern to be printed is determined; the pattern to be printed includes edge regions and non-edge regions; the edge region is divided into multiple edge partitions to facilitate the inkjet printer to print film structure on the multiple edge partitions of the pattern to be printed; wherein, from the edge region to the non-edge region, the size of the multiple edge partitions decreases sequentially; the size of one edge partition corresponds to one ink droplet sampling rate, the size of the edge partition is the width of the edge partition, and the ink droplet sampling rate of the edge partition is the proportion of ink droplets that are prohibited from printing to the total number of ink droplets in the edge partition.

[0078] In one example, the ink droplet sampling rate of the multiple edge partitions decreases sequentially from the edge region to the non-edge region.

[0079] In one example, determining the edge region of the pattern to be printed on the substrate bitmap specifically includes: binarizing the pattern to be printed to obtain a binarized image; the binarized image includes multiple rows and columns of pixels; determining the edge region of the pattern to be printed in the binarized image in a preset manner; wherein, the preset manner is to rotate an axis of a preset size around a search point at any angle; the search point is any pixel in the binarized image, and the preset size is determined by the actual size of the product edge on the substrate and the pixel size in the binarized image.

[0080] In one example, the edge region of the pattern to be printed is determined in the binarized image in a preset manner; specifically, if the binarized attribute value of a pixel through which the axis of the search point passes is 1, then the position of the search point is an edge region; if the binarized attribute value of all pixels through which the axis of the search point passes is 0, then the position of the search point is a non-edge region; wherein, the axis of the search point includes the X-axis and the Y-axis.

[0081] In one example, the edge region is the outer contour edge of the pattern to be printed; the plurality of edge partitions include a first edge partition and a second edge partition, wherein the first edge partition is located at the outer contour edge of the edge region and the second edge partition is located at the inner contour edge of the edge region; After dividing the edge region into multiple edge partitions, the method further includes: obtaining the actual printing size of the product on the substrate, wherein the actual printing size is the product size obtained by printing on the substrate with the pattern to be printed as the ink droplet configuration pattern of the inkjet printer; if the actual size is larger than the standard product size, then adding a third edge partition to the pattern to be printed, so that the pattern to be printed performs a first shrinkage operation; wherein the sampling rate of the third edge partition is 100%, and the position of the third edge partition is the position of the first edge partition; adjusting the width of the third edge partition until the actual size obtained after the pattern to be printed performs the first shrinkage operation is equal to the standard product size.

[0082] In one example, the method further includes: if the actual size is smaller than the standard product size, adding a fourth edge partition to the pattern to be printed to cause the pattern to be printed to perform a first outward expansion operation; wherein the sampling rate of the fourth edge partition is 0%, and the position of the fourth edge partition is the position of the second edge partition in the pattern to be printed; adjusting the width of the fourth edge partition until the actual size obtained after the pattern to be printed performs the first outward expansion operation is equal to the standard product size.

[0083] In one example, the edge region is the inner contour edge of the pattern to be printed; the plurality of edge partitions include a fifth edge partition and a sixth edge partition, the fifth edge partition being located at the outer contour edge of the edge region, and the sixth edge partition being located at the inner contour edge of the edge region; After dividing the edge region into multiple edge partitions, the method further includes: obtaining the actual printing size of the product on the substrate, wherein the actual printing size is the product size obtained by printing on the substrate with the pattern to be printed as the ink droplet configuration pattern of the inkjet printer; if the actual size is larger than the standard product size, then adding a seventh edge partition to the pattern to be printed, so that the pattern to be printed performs a second shrinkage operation; wherein the sampling rate of the seventh edge partition is 100%, and the position of the seventh edge partition is the position of the fifth edge partition; adjusting the width of the seventh edge partition until the actual size obtained after the pattern to be printed performs the shrinkage operation is equal to the standard product size.

[0084] In one example, the method further includes: if the actual size is smaller than the standard product size, adding an eighth edge partition to the pattern to be printed to cause the pattern to be printed to perform a second outward expansion operation; wherein the sampling rate of the eighth edge partition is 0%, and the position of the eighth edge partition is the position of the sixth edge partition in the pattern to be printed; adjusting the width of the eighth edge partition until the actual size obtained after the pattern to be printed performs the second outward expansion operation is equal to the standard product size.

[0085] In one example, the shapes of the inner and outer contour edges of the pattern to be printed include circles, rectangles, squares, elongated rectangles, and "capsule" shapes.

[0086] In one example, the method further includes: after printing the film structure on the substrate, obtaining the film thickness of the edge region; if the film thickness of the edge region has a "recess", then confirming the position of the "recess" in the edge region in the substrate; in the substrate bitmap, reducing the sampling rate of the ninth edge partition until the film thickness of the edge region does not have a "recess"; wherein, the ninth edge partition is the position corresponding to the position of the "recess" in the edge region on the substrate.

[0087] In one example, the location of the "recess" in the edge region is confirmed; specifically, this includes: determining the distance between the "recess" location in the product printing area and the center of the product printing area using a camera; the substrate includes multiple product printing areas, and one pattern to be printed corresponds to multiple product printing areas; the location of the "recess" in the edge region is determined based on the distance.

[0088] In one example, the method further includes: after printing the film structure on the substrate, obtaining the film thickness of the edge region; if there is a "protrusion" in the film thickness of the edge region, confirming the position of the "protrusion" in the edge region in the substrate; increasing the sampling rate of the tenth edge partition in the substrate bitmap until there is no "protrusion" in the film thickness of the edge region; wherein, the tenth edge partition is the position corresponding to the position of the "protrusion" in the edge region on the substrate.

[0089] It should be noted that the above embodiments of the apparatus are only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0090] The specification also discloses a computer-readable storage medium storing instructions that, when executed, perform the method described above.

[0091] This embodiment also discloses an electronic device, which can be a processing device involving the edge region in inkjet printing of film layer structures, to perform the above-described method. (Refer to...) Figure 6 The electronic device may include: at least one processor 601, at least one communication bus 602, display 603, network interface 604, and at least one memory 605.

[0092] The communication bus 602 is used to enable communication between these components.

[0093] The display 603 may include a display screen and a camera.

[0094] The network interface 604 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface).

[0095] The processor 601 may include one or more processing cores. The processor 601 connects to various parts of the server using various interfaces and lines, and performs various server functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory 605, and by calling data stored in the memory 605. Optionally, the processor 601 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 601 may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content required for display; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the processor 601 and may be implemented as a separate chip.

[0096] The memory 605 may include random access memory (RAM) or read-only memory. Optionally, the memory 605 may include a non-transitory computer-readable storage medium. The memory 605 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 605 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch functionality, sound playback functionality, image playback functionality, etc.), instructions for implementing the various method embodiments described above, etc.; the data storage area may store data involved in the various method embodiments described above, etc. Optionally, the memory 605 may also be at least one storage device located remotely from the aforementioned processor 601. As shown in the figure, the memory 605, as a computer storage medium, may include an operating system, a network communication module, and application programs for a display module.

[0097] exist Figure 6 In the electronic device shown, the display 603 is mainly used to provide an input interface for the user and to obtain the user input data; while the processor 601 can be used to call the application program stored in the memory 605. When executed by one or more processors 601, the electronic device performs one or more methods as described in the above embodiments.

[0098] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0099] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0100] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be through some service interfaces; indirect couplings or communication connections between apparatuses or units may be electrical or other forms.

[0101] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0102] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0103] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage device 605. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage device 605 and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage device 605 includes various media capable of storing program code, such as a USB flash drive, external hard drive, magnetic disk, or optical disk.

[0104] The above are merely exemplary embodiments of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Those skilled in the art will readily conceive of other embodiments of this disclosure upon considering the specification and practical application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described herein. The specification and embodiments are considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A method for processing an edge area in inkjet printing involving a film layer structure, characterized by, The processing method includes: On the substrate bitmap, the edge region of the pattern to be printed is determined; the pattern to be printed includes edge regions and non-edge regions; The edge region is divided into multiple edge partitions to facilitate the inkjet printer to print film structures on the multiple edge partitions of the pattern to be printed; wherein, From the edge region to the non-edge region, the sizes of the multiple edge partitions decrease sequentially; each edge partition corresponds to a droplet sampling rate, the size of the edge partition is the width of the edge partition, and the droplet sampling rate of the edge partition is the proportion of prohibited ink droplets to the total number of ink droplets in the edge partition.

2. The processing method according to claim 1, characterized in that, Determining the edge region of the pattern to be printed on the substrate bitmap specifically includes: The pattern to be printed is binarized to obtain a binarized image; the binarized image includes multiple rows and columns of pixels; The edge region of the pattern to be printed is determined in the binarized image using a preset method; wherein, The preset method is to rotate at any angle around an axis of a preset size, with the search point as the center; the search point is any pixel in the binarized image, and the preset size is determined by the actual size of the product edge on the substrate and the pixel size in the binarized image.

3. The processing method according to claim 2, characterized in that, In a preset manner, the edge region of the pattern to be printed is determined in the binarized image; specifically including: If the axis of the search point passes through a pixel whose binarized attribute value is 1, then the position of the search point is an edge region; If the binary attribute values ​​of all pixels through which the axis of the search point passes are 0, then the location of the search point is a non-edge region; wherein, the axis of the search point includes the X-axis and the Y-axis.

4. The processing method according to claim 1, characterized in that, The edge region is the outer contour edge of the pattern to be printed; the plurality of edge partitions include a first edge partition and a second edge partition, wherein the first edge partition is located at the outer contour edge of the edge region and the second edge partition is located at the inner contour edge of the edge region; After dividing the edge region into multiple edge partitions, the method further includes: Obtain the actual printing size of the product on the substrate. The actual printing size is the product size obtained by printing on the substrate with the pattern to be printed as the ink droplet configuration pattern of the inkjet printer. If the actual size is larger than the standard product size, a third edge partition is added to the pattern to be printed so that the pattern to be printed performs a first inward shrinkage operation; wherein, the sampling rate of the third edge partition is 100%, and the position of the third edge partition is the position of the first edge partition; Adjust the width of the third edge partition until the actual size obtained after the first shrinkage operation of the pattern to be printed is equal to the standard product size.

5. The processing method according to claim 4, characterized in that, The method further includes: If the actual size is smaller than the standard product size, a fourth edge partition is added to the pattern to be printed so that the pattern to be printed performs a first outward expansion operation; wherein, the sampling rate of the fourth edge partition is 0%, and the position of the fourth edge partition is the position of the second edge partition in the pattern to be printed; Adjust the width of the fourth edge partition until the actual size obtained after the first outward expansion operation of the pattern to be printed is equal to the standard product size.

6. The processing method according to claim 1, characterized in that, The edge region is the inner contour edge of the pattern to be printed; the plurality of edge partitions include a fifth edge partition and a sixth edge partition, the fifth edge partition being located at the outer contour edge of the edge region, and the sixth edge partition being located at the inner contour edge of the edge region; After dividing the edge region into multiple edge partitions, the method further includes: Obtain the actual printing size of the product on the substrate. The actual printing size is the product size obtained by printing on the substrate with the pattern to be printed as the ink droplet configuration pattern of the inkjet printer. If the actual size is larger than the standard product size, a seventh edge partition is added to the pattern to be printed so that the pattern to be printed performs a second indentation operation; wherein, the sampling rate of the seventh edge partition is 100%, and the position of the seventh edge partition is the position of the fifth edge partition; Adjust the width of the seventh edge partition until the actual size obtained after the second shrinkage operation of the pattern to be printed is equal to the standard product size.

7. The processing method according to claim 6, characterized in that, The method further includes: If the actual size is smaller than the standard product size, an eighth edge partition is added to the pattern to be printed so that the pattern to be printed performs a second outward expansion operation; wherein, the sampling rate of the eighth edge partition is 0%, and the position of the eighth edge partition is the position of the sixth edge partition in the pattern to be printed; Adjust the width of the eighth edge partition until the actual size obtained after the second outward expansion operation of the pattern to be printed is equal to the standard product size.

8. The processing method according to claim 4 or 7, characterized in that, The method further includes: After printing the film structure on the substrate, the film thickness in the edge region is obtained; If there is a "recession" in the film thickness of the edge region, then the location of the "recession" in the edge region is confirmed in the substrate; In the substrate bitmap, the sampling rate of the ninth edge partition is reduced until the film thickness of the edge region is free of "recesses"; wherein, the ninth edge partition is the position corresponding to the "recesses" in the edge region on the substrate.

9. The processing method according to claim 4 or 7, characterized in that, The method further includes: After printing the film structure on the substrate, the film thickness in the edge region is obtained; If there is a "protrusion" in the film thickness of the edge region, then the location of the "protrusion" in the edge region is identified in the substrate; In the substrate bitmap, the sampling rate of the tenth edge partition is increased until there are no "protrusions" in the film thickness of the edge region; wherein, the tenth edge partition is the position corresponding to the position of the "protrusion" in the edge region on the substrate.

10. The processing method according to claim 1, characterized in that, From the edge region to the non-edge region, the ink droplet sampling rate of the multiple edge partitions decreases sequentially.

11. An apparatus for processing edge regions in inkjet printing of film structures, characterized in that, The processing device includes a processor, a memory, a user interface, and a network interface. The memory stores instructions, the user interface and the network interface are used to communicate with other devices, and the processor executes the instructions stored in the memory to cause the processing device to execute the following instructions: On the substrate bitmap, the edge region of the pattern to be printed is determined; the pattern to be printed includes edge regions and non-edge regions; The edge region is divided into multiple edge partitions to facilitate the inkjet printer to print film structures on the multiple edge partitions of the pattern to be printed; wherein, from the edge region to the non-edge region, the size of the multiple edge partitions decreases sequentially; one size of the edge partition corresponds to one droplet sampling rate, the size of the edge partition is the width of the edge partition, and the droplet sampling rate of the edge partition is the proportion of ink droplets that are prohibited from printing to the total number of ink droplets in the edge partition.

Images