Film layer printing method and device, electronic equipment and storage medium

Abstract

The application discloses a film layer printing method and device, electronic equipment and storage medium. The application can divide the to-be-printed unit in the substrate into multiple sub-regions, and control the printing nozzle of the printing device to print the material in the sub-region, so as to form a film layer. In the application, the to-be-printed unit in the substrate is divided into multiple sub-regions according to the size information of the to-be-printed unit, and then the printing nozzle is controlled to print the sub-region, so that the flowing time of the material in the to-be-printed unit is reduced, the distribution of the material in the to-be-printed unit is more uniform, the generation of the coffee ring effect is avoided, and the thickness of the film layer is effectively ensured to be more consistent. Therefore, the stability of the device can be improved.

Description

Technical Field

[0001] This invention relates to the field of electronic science and technology, and more specifically to film printing methods, apparatus, electronic devices, and storage media. Background Technology

[0002] In recent years, inkjet printing technology has experienced rapid development. Inkjet printing primarily utilizes nozzles on an inkjet printhead to print ink solution from a cartridge into the pixel pits of a substrate. After drying, a film layer is formed, which is a component of many devices. Furthermore, inkjet printing technology boasts high material utilization, low cost, and is not limited by substrate size, making it suitable for printing on substrates of various sizes. Therefore, it can be applied in various display technology fields, especially in large-size Organic Light-Emitting Diode (OLED) devices and Quantum Dot Light-Emitting Diodes (QLED) devices.

[0003] However, the ink printed into the pixel pits of the substrate currently does not flow well within the pixel pits, which easily produces a coffee ring effect and leads to uneven film thickness, thus affecting the stability of the device. Summary of the Invention

[0004] This invention provides a film printing method, apparatus, electronic device, and storage medium that can ensure more consistent film thickness, thereby improving device stability.

[0005] This invention provides a film layer printing method, comprising:

[0006] The unit to be printed in the substrate is divided into multiple sub-regions to obtain the unit to be printed;

[0007] The printer nozzles of the printer are controlled to print material into sub-regions in order to form a film.

[0008] The present invention also provides a film printing apparatus, comprising:

[0009] A partitioning unit is used to divide the unit to be printed into multiple sub-regions.

[0010] The area control unit controls the printing nozzles of the printing device to print material into sub-regions in order to form a film layer.

[0011] In some embodiments, the partitioning unit is specifically used for:

[0012] Obtain the size information of the unit to be printed in the substrate;

[0013] Based on the size information, the unit to be printed in the substrate is divided into multiple sub-regions of the unit to be printed.

[0014] In some embodiments, the size information includes the printable area of ​​the unit to be printed, and the partitioning unit is specifically used for:

[0015] Determine the printing area when the printing nozzle prints material. The printing area is the area formed by the material in the printing unit when the printing nozzle prints material into the printing unit.

[0016] Based on the area to be printed and the printing area, the printing unit is divided into multiple sub-regions.

[0017] In some embodiments, the partition unit is specifically used for

[0018] Determine the quotient between the area to be printed and the area to be printed;

[0019] The printer divides the unit to be printed into multiple sub-regions.

[0020] In some embodiments, when the substrate is a display device substrate, the printing unit is the pixel pit corresponding to the sub-pixel on the display device substrate.

[0021] In some embodiments, the area control unit is specifically used for:

[0022] Determine the type of printing nozzle;

[0023] Based on the type of printing nozzle, control the printing nozzle to print material into the sub-region.

[0024] In some embodiments, the partitioning unit is specifically used for:

[0025] The sub-regions are classified to obtain the region categories, and the region categories correspond to the categories of the printing nozzles;

[0026] Based on the type of print nozzle, control the print nozzle to print material into sub-regions, including:

[0027] The printing nozzles corresponding to the control area category print material into the sub-area.

[0028] In some embodiments, the area control unit is specifically used for:

[0029] Obtain at least one sample volume corresponding to each print nozzle of the printing device. The sample volume is the total volume of material printed by the print nozzle a preset number of times, and the preset number of times is at least greater than or equal to 2.

[0030] Statistical analysis of the sample volume yields volume data of the material printed by the printing nozzle.

[0031] Based on the volume data of the printing material, the printing nozzles are classified to obtain the category of printing nozzles.

[0032] In some embodiments, the area control unit is specifically used for:

[0033] Determine the actual volume of material printed by the print nozzle each time;

[0034] Statistical analysis of the sample volume yielded data on the volume of material printed by the printing nozzle each time, including:

[0035] Based on the sample volume and the preset number of times, determine the average volume corresponding to the printing nozzle;

[0036] Based on the average volume and the actual volume, determine the standard deviation of the volume corresponding to the printing nozzle.

[0037] In some embodiments, the print nozzle categories include volume categories and stability categories, and the volume data includes volume standard deviation and volume average. The area control unit is specifically used for:

[0038] Based on the average volume, the printing nozzles are coarsely classified to obtain the volume category of the printing nozzles;

[0039] Based on the volume standard deviation, the printing nozzles corresponding to the volume categories are further subdivided to obtain stable categories of printing nozzles.

[0040] In some embodiments, the stability category includes a first stable subclass, a second stable subclass, a third stable subclass, and an unstable subclass, and the region control unit is specifically used for:

[0041] When the volume standard deviation is not greater than the first standard deviation threshold, the stability category of the printing nozzle is determined as the first stable subclass;

[0042] When the volume standard deviation is greater than the first standard deviation threshold but not greater than the second standard deviation threshold, the stability category of the printing nozzle is determined as the second stability subclass.

[0043] When the volume standard deviation is greater than the second standard deviation threshold but not greater than the third standard deviation threshold, the stability category of the printing nozzle is determined to be the third stability subclass.

[0044] When the volume standard deviation is greater than the third standard deviation threshold, the stability category of the printing nozzle is determined to be the unstable subclass.

[0045] In some embodiments, the substrate includes alignment marks, and the partitioning unit is specifically used for:

[0046] Acquire an image of the target area, which is the area within a preset range of the alignment mark, and the target area includes at least one unit to be printed;

[0047] The size information of the unit to be printed is identified based on the image of the target area.

[0048] In some embodiments, the position of the alignment mark is the origin, and the film printing apparatus is further used for:

[0049] Determine the relative distance between the cells to be printed based on the image of the target area;

[0050] Based on the size information and relative distance, determine the coordinates of the center point of the cell to be printed;

[0051] Based on the center point coordinates of the cell to be printed, determine the center point coordinates of the sub-region.

[0052] Controlling the print nozzles of the printing device to print material into the sub-region includes:

[0053] Control the printing nozzle to align with the center point coordinates of the sub-region and print material into the sub-region.

[0054] The present invention also provides an electronic device, including a memory and a processor, wherein the memory stores a plurality of instructions; the processor loads instructions from the memory to execute steps in any of the film printing methods provided by the present invention.

[0055] The present invention also provides a computer-readable storage medium storing a plurality of instructions adapted for loading by a processor to perform steps in any of the film printing methods provided by the present invention.

[0056] The present invention can divide the unit to be printed in the substrate into multiple sub-regions of the unit to be printed; and control the printing nozzle of the printing device to print material into the sub-regions in order to form a film layer.

[0057] In this invention, by dividing the printing unit in the substrate into multiple sub-regions, and then controlling the printing nozzle to align with the sub-regions for printing, the flow time of the material in the printing unit can be reduced, resulting in a more uniform material distribution in the printing unit and avoiding the coffee ring effect. This also effectively ensures a more consistent film thickness. Therefore, this solution can improve the stability of the device. Attached Figure Description

[0058] To more clearly illustrate the technical solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1aThis is a schematic diagram of a film printing method provided by the present invention.

[0060] Figure 1b This is a schematic flowchart of a film printing method provided by the present invention;

[0061] Figure 2 This is a schematic flowchart of another film printing method provided by the present invention;

[0062] Figure 3a This is a schematic diagram of the structure of a printing device provided by the present invention;

[0063] Figure 3b This is a schematic diagram of the process of applying the film printing method provided by the present invention to OLED / QLED;

[0064] Figure 3c This is a schematic diagram of a substrate provided by the present invention;

[0065] Figure 3d This is a schematic diagram of a sub-region of a pixel pit provided by the present invention;

[0066] Figure 3e This is a schematic diagram of the sub-regions printed by different types of nozzles provided by the present invention;

[0067] Figure 3f This is a schematic diagram of the sub-regions printed by different types of nozzles provided by the present invention;

[0068] Figure 3g This is a schematic diagram of the sub-regions printed by different types of nozzles provided by the present invention;

[0069] Figure 3h This is a schematic diagram of the sub-regions printed by different types of nozzles provided by the present invention;

[0070] Figure 3i This is a diagram showing the lighting effect of a device printed using a film printing method provided by the present invention.

[0071] Figure 3j This is a diagram showing the lighting effect of a device printed using other non-improved solutions provided by this invention;

[0072] Figure 4 This is a schematic diagram of a film printing device provided by the present invention;

[0073] Figure 5 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0074] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0075] This invention provides a film printing method, apparatus, electronic device, and storage medium.

[0076] Specifically, the film printing device can be integrated into an electronic device, such as a terminal or server. The terminal can be a printing device, mobile phone, tablet computer, smart Bluetooth device, laptop computer, or desktop computer. The server can be a single server or a server cluster consisting of multiple servers. In some embodiments, the server can also be implemented as a terminal.

[0077] In some embodiments, the film printing apparatus can also be integrated into multiple electronic devices. For example, the film printing apparatus can be integrated into a printing device and a computer, with the printing device and the computer jointly implementing the film printing method of the present invention.

[0078] For example, refer to Figure 1a This invention provides a schematic diagram of a film printing method, including a printing device and a computer. The quantities are merely examples; in actual applications, they can be customized as needed. The printing device may include at least one printhead, and the printhead includes multiple printing nozzles; in this invention, "multiple" refers to two or more. In some embodiments, the printing device may be an inkjet printer; the printhead is an inkjet printhead including an ink cartridge for holding material; the inkjet printer may also include a motor and a guide rail, the motor controlling the movement of the inkjet printhead on the guide rail. In some embodiments, the computer may be an independent electronic device that establishes an information link with the printing device, thus allowing for real-time information exchange between the printing device and the computer. The computer may also be a central control system on the printing device.

[0079] The following sections provide detailed descriptions of each example. It should be noted that the sequence numbers of the following embodiments are not intended to limit the preferred order of the embodiments.

[0080] In this embodiment, a film layer printing method is provided, such as... Figure 1b As shown, the specific process of this film printing method can be as follows:

[0081] 110. Obtain volume data of the printing nozzles of the printing equipment when printing material.

[0082] The material can be any material that can be used for printing, such as a liquid material. In some embodiments, the material can be a solution of an organic material or an inorganic material dispersed or dissolved; for example, it can be a luminescent organic material (such as an iridium-containing phosphorescent polymer, 9-ethylenecarbazole, etc.) or an inorganic material (such as transition metal oxides MoO3, WO3, V2O5, etc.), which can be used to manufacture display devices.

[0083] Volume data can be used to represent the change in material volume each time the print nozzle makes a print. It can be represented by any statistical analysis result, such as the average volume, standard deviation, variance, root mean square error, etc.

[0084] In some embodiments, obtaining volume data of the printing nozzle of the printing device when printing material may include, but is not limited to, the following steps:

[0085] 1. Obtain at least one sample volume corresponding to each printing nozzle of the printing device. The sample volume is the total volume of material printed by the printing nozzle a preset number of times.

[0086] The preset number of times can be customized according to the actual application. In some implementations, the preset number of times is at least greater than or equal to 2; for example, the value n of the preset number of times can be any positive integer greater than or equal to 2, such as n can be 20, 30, 50, 100, etc.

[0087] In some embodiments, a volume measuring device can be used to collect the material printed by each print nozzle a preset number of times, and measure its total volume, denoted as the sample volume V of the print nozzle. For example, taking an inkjet printer as an example, for ease of description, the liquid material in the ink cartridge in the print head can be called ink, and each ink droplet printed by the nozzle can be called an ink droplet. Assume that the inkjet print head has 200 nozzles, numbered Nozzle1, Nozzle2, Nozzle3, ..., Nozzle198, Nozzle199, Nozzle200. Nozzle No.1 ejects ink droplets 100 times, and the volume measuring device collects and measures the total volume V1 of the 100 ink droplets ejected by Nozzle No.1, denoted as the sample volume of Nozzle No.1. Similarly, the sample volumes of other nozzles can be obtained.

[0088] In some embodiments, a volume measuring device may be used to collect the actual volume of material printed by each printing nozzle each time.

[0089] It should be noted that the printing in this invention can be a process in which a printing nozzle fills a substrate with material by spraying, dripping, or flowing out to form a film layer.

[0090] 2. Statistical analysis of the sample volume was performed to obtain the volume data of the material printed by the printing nozzle each time.

[0091] In some embodiments, volume data may include a volume mean and a volume standard deviation. Statistical analysis of the sample volume to obtain the volume data of material printed by the printing nozzle each time may include, but is not limited to, the following steps:

[0092] i. Determine the actual volume of material printed by the printing nozzle each time.

[0093] ii. Determine the average volume of the printing nozzles based on the sample volume and the preset number of times. In some embodiments, the average volume can be obtained by dividing the sample volume by the preset number of times. For example, the average volume μ1 corresponding to the nozzle numbered Nozzle1 is V1 / n. Similarly, the average volumes μ2, μ3, ..., μ198, μ199, and μ200 corresponding to 200 nozzles can be obtained respectively.

[0094] iii. Determine the volume standard deviation corresponding to the printing nozzle based on the average volume value and the actual volume value. The smaller the volume standard deviation of the printing nozzle, the smaller the volume difference of the material printed by the printing nozzle each time, and the more stable the printing nozzle is. In some embodiments, the actual volume value of the material printed by the printing nozzle each time can be recorded, and the volume standard deviation σ can be calculated based on the average volume value μ and a preset number of times n. For example, the volume standard deviation can be calculated using the following formula.

[0095]

[0096] Where x represents the actual volume of ink printed by the nozzle each time, μ represents the average volume of ink printed by the nozzle a preset number of times, n represents the preset number of times, and σ represents the standard deviation of the volume of ink printed by the nozzle a preset number of times. Similarly, the standard deviations of the volume corresponding to 200 nozzles can be obtained as σ1, σ2, σ3, σ4, ..., σ198, σ199, σ200.

[0097] 120. Based on the volume data of the printing nozzle when printing material, classify the printing nozzles to obtain the category of the printing nozzle.

[0098] The type of printing nozzle can be used to indicate the volume of the material and the stability of that volume when the printing nozzle is printing.

[0099] In some embodiments, the print nozzle categories include volume categories and stability categories. Volume data includes volume standard deviation and volume average. Based on the volume data, the print nozzles are classified to obtain the print nozzle category, which may include, but is not limited to, the following steps:

[0100] 1. Based on the average volume, the printing nozzles are coarsely classified to obtain the volume categories of the printing nozzles. The volume category characterizes the volume of material printed by the printing nozzle. There is no limit to the number of volume categories; for example, it can be 4, 5, 8, etc. For instance, the volume categories could be 4-picoliter printing nozzles, 5-picoliter printing nozzles, 8-picoliter printing nozzles, etc.

[0101] In some embodiments, printing nozzles with the same average volume can be grouped into the same category. For example, assuming that the average volume of nozzles Nozzle1-Nozzle20 is 4 picoliters, then nozzles Nozzle1-Nozzle20 can be grouped into the same category, and their volume category can be recorded as 'a'. Similarly, the volume categories of other nozzles can be obtained.

[0102] In some embodiments, parameters of the printing device can be configured, and the parameters of the printing device may include volume category, which is obtained from the parameters of the printing device.

[0103] Second, based on the volume standard deviation, the printing nozzles corresponding to the volume categories are further subdivided to obtain the stable categories of the printing nozzles. The stable category represents the stability of the material volume when the printing nozzle is printing. A stable category includes at least one subcategory, such as 4, 5, or 8 subcategories.

[0104] In some embodiments, taking four seed categories as an example, the stable category may include a first stable subclass, a second stable subclass, a third stable subclass, and an unstable subclass. The volume stability of the printing nozzle corresponding to the first stable subclass to the unstable subclass gradually decreases each time it prints material.

[0105] When the volume standard deviation is not greater than the first standard deviation threshold, the stability category of the printing nozzle is determined as the first stable subclass; the first stable subclass can be denoted as Class A. The first standard deviation threshold can be customized according to the actual application, for example, it can be 2%, 1%, etc.

[0106] When the volume standard deviation is greater than the first standard deviation threshold but not greater than the second standard deviation threshold, the stability category of the printing nozzle is determined as the second stable subclass; the first stable subclass can be denoted as Class B. The second standard deviation threshold can be customized according to the actual application, for example, it can be 3%, 4%, etc.

[0107] When the volume standard deviation is greater than the second standard deviation threshold but not greater than the third standard deviation threshold, the stability category of the printing nozzle is determined as the third stable subclass; the first stable subclass can be denoted as Class C. The third standard deviation threshold can be customized according to the actual application, for example, it can be 5%, 6%, etc.

[0108] When the volume standard deviation is greater than the third standard deviation threshold, the stability category of the printing nozzle is determined as the unstable subclass; the first stable subclass can be denoted as class D.

[0109] For example, 200 nozzles can be classified according to their volume standard deviations σ1, σ2, σ3, σ4, ..., σ198, σ199, σ200. Nozzles with a volume standard deviation between 0% and 2% are classified as category A; those between 2% and 4% as category B; those between 4% and 6% as category C; and those exceeding 6% as category D. Thus, the 200 nozzles of the inkjet printhead can be divided into four categories: A, B, C, and D. Category A nozzles have the smallest volume standard deviation and the best volume stability of ink ejected per stroke; Category B nozzles have the second best volume stability; Category C nozzles have slightly worse volume stability; and Category D nozzles have the worst volume stability.

[0110] For example, nozzles with a volume standard deviation between 0% and 1% can be classified as Class A, those between 1% and 2% as Class B, those between 2% and 3% as Class C, those between 3% and 4% as Class D, those between 4% and 5% as Class E, and those exceeding 5% as Class F. Thus, the 200 nozzles of the inkjet printhead can be divided into six categories: A, B, C, D, E, and F.

[0111] In some embodiments, the print nozzle categories may include only the stability category or the volume category described above. For example, when the average volume of all print nozzles is not significantly different, the print nozzles can be classified solely according to their volume standard deviation.

[0112] 130. Based on the type of printing nozzle, control the printing nozzle to print material on the substrate in order to form a film layer.

[0113] The substrate can be a rigid substrate material or a flexible substrate material, such as transparent plastic, glass (e.g., indium tin oxide glass), metal foil, etc. In some embodiments, the substrate can be a display device substrate used to manufacture a display device.

[0114] The film layer can be a film formed from materials. In some embodiments, multiple film layers can constitute a display device; for example, the film layer can be the hole injection layer (HIL), hole transport layer (HTL), light emission layer (EML), and electron transport layer (ETL) of an organic light-emitting diode.

[0115] In some embodiments, the printing nozzles that can participate in printing can be determined based on their type, and the printing nozzles can be controlled to uniformly print material on the substrate to form a film layer. For example, if the printing nozzles that can participate in printing are determined to be type A nozzles, type A nozzles can be controlled to print the entire substrate, while type B / C / D nozzles do not participate in printing. Alternatively, if the printing nozzles that can participate in printing are determined to be type A, type B, and type C nozzles, type A, type B, and type C nozzles can be controlled to participate in printing together; because type D nozzles have a larger volume deviation in the ink droplets they eject, type D nozzles are disabled from participating in printing.

[0116] In some embodiments, the substrate may include at least one unit to be printed, which may be the smallest unit requiring material filling. In some embodiments, when the substrate is a display device substrate, the unit to be printed is a pixel pit corresponding to a sub-pixel on the display device substrate. The display device may be composed of a pixel array, and the pixels may be composed of pixel pits corresponding to red, green, and blue sub-pixels.

[0117] Depending on the type of printing nozzle, controlling the printing nozzle to print material on the substrate may include, but is not limited to, the following steps:

[0118] 1. Determine the target volume of material required for the cell to be printed. In some embodiments, the target volume can be obtained from the parameters of the substrate by configuring the substrate parameters. In some embodiments, the target volume of material required for the cell to be printed can also be measured.

[0119] 2. Based on the target volume and the type of printing nozzle, control the printing nozzle to print material into the cell to be printed.

[0120] In some embodiments, controlling the printing nozzles to print material into the cell to be printed, based on the target volume and the type of printing nozzle, may include, but is not limited to, the following steps:

[0121] i. Determine the number of prints corresponding to the unit to be printed based on the target volume and volume category. In some embodiments, the target volume category printing nozzle can be determined according to the target volume and volume category, and the number of prints corresponding to the unit to be printed can be calculated based on the average volume of the target volume and the target volume category printing nozzle. For example, if the target volume is 48 picoliters, and the volume category includes printing nozzles with an average volume of 4 picoliters and printing nozzles with an average volume of 5 picoliters, then the target volume category printing nozzle is determined to be the printing nozzle with an average volume of 4 picoliters, and it is calculated that each unit to be printed needs to be printed an average of 12 times, that is, the number of prints is 12.

[0122] ii. Based on the number of prints and stability category, control the printing nozzles to print material into the cell to form a film.

[0123] In some embodiments, within the target volume category of printing nozzles, printing nozzles eligible for printing are determined based on their stability category. In some embodiments, the printing nozzles eligible for printing are those corresponding to a first stable subclass, and these nozzles are controlled to print the required number of material drops into the cell to be printed. For example, assuming there are 90 type A nozzles, 60 type B nozzles, 40 type C nozzles, and 10 type D nozzles, 90 type A nozzles can be controlled to print 12 ink drops into each pixel pit, resulting in a mixed target volume of 48 picoliters. Because type A nozzles have the optimal volume deviation value, the printed volume is closest to the target volume, resulting in the best uniformity of the printed film thickness.

[0124] In some embodiments, within a target volume category of printing nozzles, printing nozzles eligible for printing are determined based on stable categories. Then, based on the subcategories of the eligible printing nozzles, the number of print runs is divided into at least one sub-run, with each sub-run corresponding to a subcategory. Based on the sub-runs corresponding to a subcategory, the printing nozzles corresponding to that subcategory are controlled to print material into the printing unit. In some embodiments, the printing nozzles eligible for printing are determined to be those other than those corresponding to unstable subcategories, and the printing nozzles corresponding to other subcategories are controlled to print material into the printing unit. For example, when the preset number of print runs is 12, the first stable subcategory corresponds to 8 sub-runs, the second stable subcategory corresponds to 2 sub-runs, the third stable subcategory corresponds to 2 sub-runs, and the unstable subcategory corresponds to 0 sub-runs.

[0125] For example, when a pixel needs to print 12 drops of ink, the A-type nozzles should be prioritized for printing, such as printing at least 6 drops per pixel. The remaining drops are printed by the B-type and C-type nozzles, ideally with each B-type nozzle printing at least 1 drop per pixel and each C-type nozzle printing at least 1 drop per pixel. This ensures a total of 12 drops are printed per pixel, guaranteeing the total volume is as close as possible to the target volume of 48 picoliters. Therefore, the uniformity of ink volume in each pixel is guaranteed, and a large number of nozzles on the inkjet printhead participate in printing, saving printing time. Solutions to ensure the total volume is as close as possible to the target volume can include, but are not limited to: Solution 1: Controlling the A-type nozzle to print 6 drops, the B-type nozzle to print 3 drops, and the C-type nozzle to print 3 drops. Solution 2: Controlling the A-type nozzle to print 7 drops, the B-type nozzle to print 2 drops, and the C-type nozzle to print 3 drops. Solution 3: Controlling the A-type nozzle to print 8 drops, the B-type nozzle to print 2 drops, and the C-type nozzle to print 2 drops. Option 4: Control the type A nozzle to print 9 drops, the type B nozzle to print 1 drop, and the type C nozzle to print 2 drops.

[0126] As can be seen from the above, in this embodiment, by acquiring the volume data of the printing nozzles each time they print material, classifying the printing nozzles based on the volume data, and then controlling the printing nozzles based on the category of the printing nozzles, the thickness of the formed film layer can be made more consistent. Therefore, this solution can achieve better uniformity in the thickness of the printed film layer, resulting in better light emission effects and higher stability of the display device.

[0127] In some embodiments, a film printing method may also be provided, the specific process of which may be as follows:

[0128] S1: Obtain the type of the printing nozzle of the printing device. The type of printing nozzle is used to indicate the volume of the material and the stability of the volume when the printing nozzle prints the material.

[0129] In some embodiments, the type of printing nozzle can be obtained from the parameters of the printing device.

[0130] S2: Based on the type of printing nozzle, control the printing nozzle to print material on the substrate in order to form a film layer.

[0131] The specific implementation of S2 can be referred to in step 103, and will not be repeated here.

[0132] In some embodiments, when the substrate has printing units, each printing unit typically requires multiple material printing operations. If the material distribution within the printing unit is uneven, it can lead to poor material flow within the unit and uneven film thickness. Furthermore, since some materials have volatile solvents, uneven distribution of ink droplets sprayed into the pixel pits can increase the flow time of the droplets within the pits, thereby increasing the risk of coffee ring formation. Therefore, this embodiment proposes a film printing method. Figure 2 As shown, the specific process of a film layer printing method is as follows:

[0133] 210. Divide the unit to be printed in the substrate into multiple sub-regions to obtain the unit to be printed.

[0134] In some embodiments, the units to be printed in the substrate can be randomly divided into multiple sub-regions of the units to be printed.

[0135] In some embodiments, partitioning the unit to be printed in the substrate to obtain multiple sub-regions of the unit to be printed may include, but is not limited to, the following steps:

[0136] 1. Obtain the size information of the unit to be printed in the substrate.

[0137] The size information includes the area of ​​the unit to be printed.

[0138] In some embodiments, the parameters of the substrate can be configured, and the printable area of ​​the unit to be printed can be obtained from the parameters of the substrate.

[0139] In some embodiments, the substrate includes alignment marks. Obtaining the size information of the unit to be printed in the substrate may include, but is not limited to, the following steps:

[0140] i. Acquire an image of the target area, which is the region within a preset range of the alignment mark. The target area includes at least one unit to be printed. The value of the preset range can be customized according to the actual application. In some embodiments, the printing device includes an image acquisition device, such as a camera. The image acquisition device is used to acquire an image of the target area. For example, the substrate includes multiple pixel pits. Assuming that the pixel pit closest to the alignment mark is called the substrate pixel pit, a camera can be used to acquire the substrate pixel pit and the outline of the region within a preset range of the pixel pit to obtain an image of the target area.

[0141] ii. The size information of the unit to be printed is identified based on the image of the target area.

[0142] In some embodiments, the printing apparatus includes an image processing device, which can be used to identify the length and width of the unit to be printed in an image of the target area, and obtain the area to be printed based on the length and width. For example, after the image processing device identifies the length and width of the pixel pit, it can determine the area S1 to be printed of the pixel pit.

[0143] 2. Based on the size information, the unit to be printed is divided into multiple sub-regions.

[0144] In some embodiments, the cell to be printed can be divided into multiple sub-regions based on the area to be printed.

[0145] In some embodiments, the printing unit is partitioned based on size information to obtain multiple sub-regions of the printing unit, which may include, but is not limited to, the following steps:

[0146] i. Determine the printing area when the print nozzle prints material. The printing area is the area formed by the material in the printing unit when the print nozzle prints material into the unit to be printed. For example, the printing area S2 of the ink droplet falling into the pixel pit can be collected. In some embodiments, the printing area can be the area formed by the ink in the pixel pit when the nozzle prints ink into the pixel pit once.

[0147] ii. Based on the area to be printed and the printing area, the printing unit is divided into multiple sub-regions of the printing unit.

[0148] In some embodiments, a quotient between the area to be printed and the printed area is determined; the unit to be printed is divided into multiple sub-regions based on the quotient. The number of sub-regions is an integer. For example, the quotient N... max =S1 / S2, N max When the value is a decimal, it can be an integer; in inkjet printing, the actual number of sub-regions can be less than or equal to the maximum number of sub-regions N. max In some embodiments, the number of sub-regions can be preset to between 6 and 20.

[0149] In some embodiments, the relative distance between the units to be printed can be determined based on the image of the target region, using the position of the alignment marker as the origin. In some embodiments, an image processing device is used to identify the relative distance between the units to be printed in the image of the target region, thereby obtaining the distribution pattern of the units to be printed. Based on the size information and the relative distance, the center point coordinates of the units to be printed are determined; based on the center point coordinates of the units to be printed, the center point coordinates of the sub-regions are determined.

[0150] For example, the center point of the alignment mark is the origin (0, 0), the horizontal direction of the alignment mark is the x-direction, and the vertical direction is the y-direction. The image processing device calculates the coordinates (X1, Y1) of the center point of the substrate pixel pit closest to the alignment mark, and the center coordinates (X11, Y11), (X12, Y12), ..., (X14, Y14), (X15, Y15) of each of the 15 sub-regions of the pixel pit. Similarly, based on the relative positions between the substrate pixel pits, the center coordinates of each sub-region within all pixel pits on the substrate are simultaneously obtained.

[0151] 220. Control the printing nozzles of the printing equipment to print material into the sub-regions in order to form a film layer.

[0152] In some embodiments, when controlling the printing nozzles of the printing device to print material into a sub-region, the printing nozzles can be controlled to align with the center coordinates of the sub-region and print material into the sub-region. The printing nozzles can be any nozzle on the printing device. For example, in an inkjet printing device, a motor can be used to control the inkjet printhead to move on a guide rail, causing the nozzles to move to the center coordinates of the corresponding sub-region, and then the nozzles will spray ink; the nozzles can be any nozzle on the inkjet printhead.

[0153] In some embodiments, controlling the printing nozzles of a printing device to print material into a sub-region to form a film layer may include, but is not limited to, the following steps:

[0154] First, the type of printing nozzle can be determined; the specific implementation method for determining the type of printing nozzle can be referred to steps 120 and 130, which will not be repeated here.

[0155] 2. Based on the type of printing nozzle, control the printing nozzle to print material into the sub-region.

[0156] In some embodiments, controlling the printing nozzles to print material into sub-regions based on the type of printing nozzle may include, but is not limited to, the following steps:

[0157] i. Classify the sub-regions to obtain their region categories; wherein, the region category corresponds to the category of the printing nozzle. In some embodiments, the sub-regions can be classified according to the actual application. For example, if the category of the printing nozzle is a stable category of the printing nozzle, the region category of the sub-region corresponding to the first stable sub-category can be classified as region A, the region category of the sub-region corresponding to the second stable sub-category can be classified as region B, and the region category of the sub-region corresponding to the third stable sub-category can be classified as region C.

[0158] For example, suppose a pixel pit consists of 15 sub-regions. To better distinguish the landing position of the ink droplets, the 15 sub-regions in the pixel pit can be marked as region (1), region (2), ..., region (14), and region (15). In some embodiments, region A can correspond to regions (1)-(9), region B to regions (10)-(12), and region C to regions (13)-(15). Alternatively, region B can correspond to regions (1)-(3), region A to regions (4)-(12), and region C to regions (13)-(15), and so on.

[0159] ii. Controlling the printing nozzles corresponding to the region category to print material into the sub-region. In some embodiments, the volume category of the printing nozzles corresponding to the unit to be printed can be determined first based on the target volume of material required by the unit to be printed. Among the printing nozzles corresponding to the volume category, the printing nozzles corresponding to the region category can be controlled to print material into the sub-region. For example, the printing nozzles corresponding to the first stable sub-category can be controlled to print material into region A, the printing nozzles corresponding to the second stable sub-category can be controlled to print material into region B, and the printing nozzles corresponding to the third stable sub-category can be controlled to print material into region C.

[0160] For example, assuming the target volume of the pixel pit is 40 picoliters, a nozzle with a volume category of 4 picoliters and a preset number of prints of 10 are selected. The methods for controlling the nozzle to print ink into the sub-region can include, but are not limited to, the following:

[0161] Option 1: It can control the type A nozzle to print 7 drops, the type B nozzle to print 2 drops, and the type C nozzle to print 1 drop. That is, the type A nozzle can select any 7 sub-regions in the (1) to (9) regions (Area A) and spray 1 drop of ink in each sub-region; the type B nozzle can select any 2 sub-regions in the (10) to (12) regions (Area B) and spray 1 drop of ink in each sub-region; the type C nozzle can select any 1 sub-region in the (13) to (15) regions (Area C) and spray 1 drop of ink in each sub-region.

[0162] Option 2: It can control the type A nozzle to print 6 drops, the type B nozzle to print 2 drops, and the type C nozzle to print 2 drops. That is, the type A nozzle can select any 6 points in the (4) to (12) areas (area A) and spray 1 drop of ink in each sub-area; the type B nozzle can select any 2 points in the (1) to (3) areas (area B) and spray 1 drop of ink in each sub-area; the type C nozzle can select any 2 points in the (13) to (15) areas (area C) and spray 1 drop of ink in each sub-area.

[0163] Option 3: It can control the type A nozzle to print 5 drops, the type B nozzle to print 3 drops, and the type C nozzle to print 2 drops. That is, the type A nozzle can randomly select 5 points in the (7) to (15) areas (area A) and spray 1 drop of ink in each sub-area; the type B nozzle can spray 1 drop of ink in each of the (1) to (3) areas (area B); the type C nozzle can randomly select 2 points in the (4) to (6) areas (area C) and spray 1 drop of ink in each sub-area.

[0164] Option 4: It can control the type A nozzle to print 5 drops, the type B nozzle to print 3 drops, and the type C nozzle to print 2 drops. That is, the type A nozzle can select any 5 sub-regions in the (7) to (12) area (Area A) to spray 5 drops of ink; the type B nozzle can select any 3 sub-regions in the (1) to (6) area (Area B) to spray 3 drops of ink; and the type C nozzle can select any 2 sub-regions in the (13) to (15) area (Area C) to spray 2 drops of ink.

[0165] As can be seen from the above, in this embodiment, by dividing the printing unit in the substrate into multiple sub-regions, and then controlling the printing nozzle to align with the sub-regions for printing, the flow time of the material in the printing unit can be reduced, the material distribution in the printing unit can be made more uniform, and the generation of the coffee ring effect can be avoided. At the same time, it can also effectively ensure a more consistent film thickness. Therefore, this solution can improve the stability of the device.

[0166] The film-layer printing solution provided by this invention can be applied to various scenarios where devices are composed of film layers. For example, taking the film-layer printing scenario of OLED or QLED as an example, this scenario includes an inkjet printer and a computer controlling the inkjet printer. It should be noted that this embodiment only uses a computer as an example; in practical applications, other electronic devices can also control the inkjet printer. The printing device is an inkjet printer, such as... Figure 3a As shown, the inkjet printing equipment includes an inkjet printhead 10, a nozzle 20, a motor 30, and a guide rail 40. The motor 30 controls the movement of the inkjet printhead 10 on the guide rail 40. The inkjet printing equipment also includes an image acquisition device 50 and an image processing device 60. A volume measurement device 70 is also included in this scenario. In this scenario, the substrate is a display device substrate, and the unit to be printed is the pixel pit corresponding to a sub-pixel. The film layer printing method will be further described in detail below.

[0167] like Figure 3b As shown, the specific process of a film layer printing method is as follows:

[0168] 310. The computer obtains at least one sample volume corresponding to each nozzle of the inkjet printer, and the sample volume is the total volume of ink for a preset number of prints by the nozzle.

[0169] For example, assuming a preset number of passes is 100, and the inkjet printhead has 200 nozzles, numbered sequentially as Nozzle1, Nozzle2, Nozzle3, ..., Nozzle198, Nozzle199, and Nozzle200. Nozzle No.1 is selected to spray material 100 times. The total volume V1 of material sprayed by nozzle No.1 in these 100 passes is collected and measured using a volumetric measuring device. V1 is denoted as the sample volume of nozzle No.1. Similarly, the sample volumes of the other nozzles can be obtained.

[0170] 320. The computer determines the average volume of the nozzle based on the sample volume and the preset number of times; and determines the standard deviation of the nozzle based on the average volume and the sample volume.

[0171] For example, the average volume μ1 corresponding to nozzle Nozzle1 is V1 / n. Similarly, the average volume μ2, μ3, ..., μ198, μ199, and μ200 corresponding to 200 nozzles can be obtained respectively. The actual volume value of ink printed by each nozzle can be recorded, and the volume standard deviation σ can be calculated based on the average volume μ and the preset number of prints n. Similarly, the volume standard deviations corresponding to 200 nozzles can be obtained as σ1, σ2, σ3, σ4, ..., σ198, σ199, and σ200 respectively.

[0172] 330. The computer performs a coarse classification of nozzles based on the average volume to obtain the nozzle volume category; based on the standard deviation of the volume, it performs a fine classification of the nozzles corresponding to the volume category to obtain the nozzle stability category.

[0173] For example, assuming that the average volume of nozzles Nozzle1-Nozzle20 is 4 picoliters, then nozzles Nozzle1-Nozzle20 can be classified into the same category 'a', and their volume category can be recorded as 'a'. Similarly, the volume categories of other nozzles can be obtained.

[0174] The 200 nozzles can be classified according to their volume standard deviations σ1, σ2, σ3, σ4, ..., σ198, σ199, and σ200. Nozzles with a volume standard deviation between 0% and 2% are classified as category A, those between 2% and 4% as category B, those between 4% and 6% as category C, and those exceeding 6% as category D. Thus, the 200 nozzles of the inkjet printhead can be divided into four categories: A, B, C, and D.

[0175] 340. The computer determines the target volume of ink required for the pixel pits in the substrate; based on the target volume and the volume category of the nozzle, it determines the number of prints corresponding to the pixel pits; based on the number of prints and the stability category, it determines the nozzles that participate in the printing.

[0176] For example, if the target volume of ink required for the pixel pit in the substrate is determined to be 40 picoliters, and the volume categories include nozzles with an average volume of 4 picoliters and nozzles with an average volume of 6 picoliters, then the nozzle with an average volume of 4 picoliters can be selected, and it is calculated that each pixel pit needs to be printed 10 times on average, that is, the number of printing times is 10.

[0177] Among the nozzles corresponding to 4 picoliters, priority should be given to type A nozzles to participate in printing more, for example, type A nozzles should print more than 6 drops per pixel pit, and the remaining drops should be printed by type B and type C nozzles. Ideally, type B nozzles should print at least 1 drop per pixel pit, and type C nozzles should also print at least 1 drop per pixel pit.

[0178] 350. The computer obtains the printing area of ​​the pixel pits in the substrate; determines the printing area corresponding to the nozzle, which is the area formed by the ink in the pixel pit when the nozzle prints ink into the pixel pit.

[0179] like Figure 3cAs shown, the substrate 54 includes substrate pixel pits 55 and alignment marks 56. A camera is used to capture the substrate pixel pit 55 closest to the alignment mark 56 and the outline of the area within a preset range of the pixel pit; after the length and width of the pixel pit are identified by an image processing device, the printing area S1 of the pixel pit can be determined. The printing area S2 where ink droplets fall into the pixel pit can be captured.

[0180] 360. The computer divides the pixel pits into multiple sub-regions based on the area to be printed and the printing area.

[0181] In inkjet printing, the maximum number of regions is Nmax = S1 / S2; the actual number of regions can be less than the maximum number Nmax, and can be between 6 and 20. The pixel pit is divided into a number of sub-regions. For example... Figure 3d As shown, a single pixel pit is divided into 15 sub-regions. In order to better distinguish the landing position of the ink droplet, the 15 sub-regions in the pixel pit can be marked as region (1), region (2), ..., region (14), and region (15).

[0182] Assume the center point of the alignment mark is the origin (0, 0), the horizontal direction of the alignment mark is the x-direction, and the vertical direction is the y-direction. The image processing device calculates the coordinates (X1, Y1) of the center point of the substrate pixel pit closest to the alignment mark, and the center coordinates (X11, Y11), (X12, Y12), ..., (X14, Y14), (X15, Y15) of each of the 15 sub-regions divided into pixel pits. Similarly, based on the relative positions between the substrate pixel pits, the center coordinates of each sub-region within all pixel pits on the substrate are simultaneously obtained.

[0183] 370. The computer classifies the sub-regions to obtain the region categories of the sub-regions, and the region categories correspond to the stable categories of the nozzles; the nozzles corresponding to the region categories are controlled to print ink into the sub-regions in order to form a film layer.

[0184] The guide rail can be controlled to move the inkjet printhead, aligning the nozzle with the center point coordinates of a sub-region and printing ink into that region. For example, assuming the target volume of the pixel pit is 40 picoliters, a nozzle with a volume type of 4 picoliters and a preset print count of 10 can be selected. The methods for controlling the nozzle to print ink into the sub-region can include, but are not limited to, the following:

[0185] Option 1: As Figure 3eAs shown, type A nozzles correspond to areas (1)-(9), type B nozzles correspond to areas (10)-(12), and type C nozzles correspond to areas (13)-(15). Therefore, it is possible to control type A nozzles to print 7 drops, type B nozzles to print 2 drops, and type C nozzles to print 1 drop. That is, type A nozzles can arbitrarily select 7 sub-areas in areas (1) to (9) and spray 1 drop of ink in each sub-area; type B nozzles can arbitrarily select 2 sub-areas in areas (10) to (12) and spray 1 drop of ink in each sub-area; type C nozzles can arbitrarily select 1 sub-area in areas (13) to (15) and spray 1 drop of ink in each sub-area.

[0186] Option 2: Figure 3f As shown, type B nozzles can correspond to areas (1)-(3), type A nozzles to areas (4)-(12), and type C nozzles to areas (13)-(15). It is possible to control type A nozzles to print 6 drops, type B nozzles to print 2 drops, and type C nozzles to print 2 drops. That is, type A nozzles can arbitrarily select 6 points in areas (4) to (12), spraying 1 drop of ink in each sub-area; type B nozzles can arbitrarily select 2 points in areas (1) to (3), spraying 1 drop of ink in each sub-area; and type C nozzles can arbitrarily select 2 points in areas (13) to (15), spraying 1 drop of ink in each sub-area.

[0187] Option 3: As Figure 3g As shown, type B nozzles can correspond to areas (1)-(3), type C nozzles to areas (4)-(6), type A nozzles to areas (7)-(15), and so on. It is possible to control type A nozzles to print 5 drops, type B nozzles to print 3 drops, and type C nozzles to print 2 drops. That is, type A nozzles can select any 5 points in areas (7) to (15) and spray 1 drop of ink in each sub-area; type B nozzles can spray 1 drop of ink in each of areas (1) to (3); type C nozzles can select any 2 points in areas (4) to (6) and spray 1 drop of ink in each sub-area.

[0188] Option 4: As Figure 3h As shown, type B nozzles can correspond to areas (1)-(6), type A nozzles to areas (7)-(12), and type C nozzles to areas (13)-(15). It is possible to control type A nozzles to print 5 drops, type B nozzles to print 3 drops, and type C nozzles to print 2 drops. That is, type A nozzles can select any 5 sub-areas in areas (7) to (12) to spray 5 drops of ink; type B nozzles can select any 3 sub-areas in areas (1) to (6) to spray 3 drops of ink; and type C nozzles can select any 2 sub-areas in areas (13) to (15) to spray 2 drops of ink.

[0189] Furthermore, this embodiment also demonstrates the lighting effect of the printed device, such as... Figure 3i As shown, the device does not exhibit the phenomenon of uneven color causing various marks (Mura unevenness). However, in other unimproved solutions, such as... Figure 3j As shown, uneven coloring often occurs after the printed device is lit up.

[0190] As shown above, in this embodiment, by acquiring and analyzing the total volume of ink printed a preset number of times by the nozzle, the volume data of ink during each print is obtained. Based on this volume data, the nozzles are classified to determine their categories. Then, the pixel pits in the substrate are partitioned using the pixel pit size information to obtain multiple sub-regions. The nozzles are then controlled to align with these sub-regions for printing based on their categories. This reduces the ink flow time in the pixel pits, resulting in a more uniform ink distribution and avoiding the coffee ring effect. It also effectively ensures a more consistent film thickness. Therefore, this solution improves the stability of the device.

[0191] To better implement the above methods, the present invention also provides a film printing device. For example, in this embodiment, the method of the present invention will be described in detail by taking the film printing device as specifically integrated into an electronic device.

[0192] For example, such as Figure 4 As shown, the film printing apparatus may include a volume acquisition unit 401, a classification unit 402, and a category control unit 403, as follows:

[0193] (I) Volume Acquisition Unit 401

[0194] The volume acquisition unit 401 is used to acquire volume data of the printing nozzle of the printing device when printing material.

[0195] (II) Classification Unit 402

[0196] The classification unit 402 is used to classify the printing nozzles based on the volume data of the printing nozzles when printing material, and obtain the category of the printing nozzles.

[0197] (III) Category Control Unit 403

[0198] Category control unit 403 is used to control the printing nozzle to print material on the substrate based on the category of the printing nozzle in order to form a film layer.

[0199] The substrate includes at least one unit to be printed, and the category control unit 403 is specifically used for:

[0200] Determine the target volume of material required for the cell to be printed;

[0201] Based on the target volume and the type of printing nozzle, the printing nozzle is controlled to print material into the cell to be printed.

[0202] In some embodiments, the print nozzle category includes a volume category and a stability category, and the category control unit 403 is specifically used for:

[0203] Based on the target volume and volume category, determine the number of print runs corresponding to the unit to be printed;

[0204] Based on the number of prints and stability category, the printing nozzles are controlled to print material into the cell to form a film.

[0205] In some embodiments, the stability category includes at least one subcategory, and the category control unit 403 is specifically used for:

[0206] Based on subcategories, the number of print counts is divided into at least one sub-count, with each sub-count corresponding to a sub-category;

[0207] Based on the sub-number corresponding to the sub-category, the printing nozzle corresponding to the sub-category is controlled to print material into the unit to be printed.

[0208] In some embodiments, when the substrate is a display device substrate, the printing unit is the pixel pit corresponding to the sub-pixel on the display device substrate.

[0209] In some embodiments, the volume acquisition unit 401 is specifically used for:

[0210] Obtain at least one sample volume corresponding to each print nozzle of the printing device. The sample volume is the total volume of material printed by the print nozzle a preset number of times, and the preset number of times is at least greater than or equal to 2.

[0211] Statistical analysis of the sample volume yields volume data of the material printed by the printing nozzle.

[0212] In some embodiments, the film printing apparatus is further used for:

[0213] Determine the actual volume of material printed by the print nozzle each time;

[0214] Volume data includes the volume standard deviation and volume mean. Statistical analysis of the sample volume yields the volume data of the material printed by the printing nozzle each time, including:

[0215] Based on the sample volume and the preset number of times, determine the average volume corresponding to the printing nozzle;

[0216] Based on the average volume and the actual volume, determine the standard deviation of the volume corresponding to the printing nozzle.

[0217] In some embodiments, the printing nozzle categories include volume categories and stability categories, and the volume data includes volume standard deviation and volume average. The classification unit 402 is specifically used for:

[0218] Based on the average volume, the printing nozzles are coarsely classified to obtain the volume category of the printing nozzles;

[0219] Based on the volume standard deviation, the printing nozzles corresponding to the volume categories are further subdivided to obtain stable categories of printing nozzles.

[0220] In some embodiments, the stability category includes a first stable subclass, a second stable subclass, a third stable subclass, and an unstable subclass, and the classification unit 402 is specifically used for:

[0221] When the volume standard deviation is not greater than the first standard deviation threshold, the stability category of the printing nozzle is determined as the first stable subclass;

[0222] When the volume standard deviation is greater than the first standard deviation threshold but not greater than the second standard deviation threshold, the stability category of the printing nozzle is determined as the second stability subclass.

[0223] When the volume standard deviation is greater than the second standard deviation threshold but not greater than the third standard deviation threshold, the stability category of the printing nozzle is determined to be the third stability subclass.

[0224] When the volume standard deviation is greater than the third standard deviation threshold, the stability category of the printing nozzle is determined to be the unstable subclass.

[0225] like Figure 4 As shown, the film printing apparatus may further include a partitioning unit 404 and a region control unit 405, as follows:

[0226] (iv) Partition Unit 404

[0227] The partitioning unit 404 is used to partition the unit to be printed in the substrate to obtain multiple sub-regions of the unit to be printed.

[0228] (V) Area Control Unit 405

[0229] The area control unit 405 is used to control the printing nozzles of the printing device to print material into the sub-region in order to form a film layer.

[0230] In some embodiments, partitioning unit 404 is specifically used for:

[0231] Obtain the size information of the unit to be printed in the substrate;

[0232] Based on the size information, the unit to be printed in the substrate is divided into multiple sub-regions of the unit to be printed.

[0233] In some embodiments, the size information includes the printable area of ​​the unit to be printed, and the partitioning unit 404 is specifically used for:

[0234] Determine the printing area when the printing nozzle prints material. The printing area is the area formed by the material in the printing unit when the printing nozzle prints material into the printing unit.

[0235] Based on the area to be printed and the printing area, the printing unit is divided into multiple sub-regions.

[0236] In some embodiments, partitioning unit 404 is specifically used for

[0237] Determine the quotient between the area to be printed and the area to be printed;

[0238] The printer divides the unit to be printed into multiple sub-regions.

[0239] In some embodiments, when the substrate is a display device substrate, the printing unit is the pixel pit corresponding to the sub-pixel on the display device substrate.

[0240] In some embodiments, the area control unit 405 is specifically used for:

[0241] Determine the type of printing nozzle;

[0242] Based on the type of printing nozzle, control the printing nozzle to print material into the sub-region.

[0243] In some embodiments, partitioning unit 404 is specifically used for:

[0244] The sub-regions are classified to obtain the region categories, and the region categories correspond to the categories of the printing nozzles;

[0245] Based on the type of print nozzle, control the print nozzle to print material into sub-regions, including:

[0246] The printing nozzles corresponding to the control area category print material into the sub-area.

[0247] In some embodiments, the substrate includes alignment marks, and the partitioning unit 404 is specifically used for:

[0248] Acquire an image of the target area, which is the area within a preset range of the alignment mark, and the target area includes at least one unit to be printed;

[0249] The size information of the unit to be printed is identified based on the image of the target area.

[0250] In some embodiments, the position of the alignment mark is the origin, and the film printing apparatus is further used for:

[0251] Determine the relative distance between the cells to be printed based on the image of the target area;

[0252] Based on the size information and relative distance, determine the coordinates of the center point of the cell to be printed;

[0253] Based on the center point coordinates of the cell to be printed, determine the center point coordinates of the sub-region.

[0254] Controlling the print nozzles of the printing device to print material into the sub-region includes:

[0255] Control the printing nozzle to align with the center point coordinates of the sub-region and print material into the sub-region.

[0256] In practice, each of the above units can be implemented as an independent entity or can be arbitrarily combined to be implemented as the same or several entities. For the specific implementation of each of the above units, please refer to the previous method embodiments, which will not be repeated here.

[0257] As can be seen from the above, the film printing apparatus of this embodiment acquires the volume data of the printing nozzles when printing material, classifies the printing nozzles based on the volume data, and then controls the printing nozzles based on the category of the printing nozzles, which can make the thickness of the formed film more consistent. Therefore, this solution can improve the stability of the device.

[0258] Accordingly, embodiments of this application also provide an electronic device, such as... Figure 5 As shown, Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device 500 includes a processor 501 with one or more processing cores, a memory 502 with one or more computer-readable storage media, and a computer program stored in the memory 502 and executable on the processor. The processor 501 and the memory 502 are electrically connected. Those skilled in the art will understand that the electronic device structure shown in the figure does not constitute a limitation on the electronic device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0259] The processor 501 is the control center of the electronic device 500. It connects various parts of the electronic device 500 through various interfaces and lines. By running or loading software programs and / or modules stored in the memory 502, and calling data stored in the memory 502, it performs various functions of the electronic device 500 and processes data, thereby monitoring the electronic device 500 as a whole.

[0260] In this embodiment, the processor 501 in the electronic device 500 loads the instructions corresponding to the processes of one or more applications into the memory 502 according to the following steps, and the processor 501 runs the applications stored in the memory 502 to achieve various functions:

[0261] Obtain volume data of the printing nozzles of the printing device when printing material;

[0262] Based on the volume data of the printing nozzle when printing material, the printing nozzles are classified to obtain the category of printing nozzle;

[0263] Based on the type of printing nozzle, the printing nozzle is controlled to print material on the substrate in order to form a film layer.

[0264] In some embodiments, the processor 501 runs an application stored in the memory 502 and also performs the following functions:

[0265] The unit to be printed in the substrate is divided into multiple sub-regions to obtain the unit to be printed;

[0266] The printer nozzles of the printer are controlled to print material into sub-regions in order to form a film.

[0267] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0268] Optional, such as Figure 5 As shown, the electronic device 500 also includes: a touch display screen 503, a radio frequency circuit 504, an audio circuit 505, an input unit 506, and a power supply 507. The processor 501 is electrically connected to the touch display screen 503, the radio frequency circuit 504, the audio circuit 505, the input unit 506, and the power supply 507. Those skilled in the art will understand that... Figure 5 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0269] The touch display screen 503 can be used to display a graphical user interface (GUI) and receive operation commands generated by the user interacting with the GUI. The touch display screen 503 may include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of the electronic device. These graphical user interfaces can be composed of graphics, text, icons, video, and any combination thereof. Optionally, the display panel can be configured using a liquid crystal display (LCD), organic light-emitting diode (OLED), or other similar technologies. The touch panel can be used to collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel), generate corresponding operation commands, and execute the corresponding program according to the operation commands. Optionally, the touch panel may include two parts: a touch detection device and a touch controller. The touch detection device detects the user's touch location and the signal generated by the touch operation, transmitting the signal to the touch controller. The touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to the processor 501. It can also receive and execute commands from the processor 501. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it transmits the information to the processor 501 to determine the type of touch event. Subsequently, the processor 501 provides corresponding visual output on the display panel based on the type of touch event. In this embodiment, the touch panel and the display panel can be integrated into the touch display screen 503 to achieve input and output functions. However, in some embodiments, the touch panel and the touch display screen 503 can be implemented as two independent components to achieve input and output functions. That is, the touch display screen 503 can also be used as part of the input unit 506 to achieve input functions.

[0270] In this embodiment, the processor 501 executes the application corresponding to the printing device to generate a graphical user interface on the touch display screen 503. The touch display screen 503 is used to present the graphical user interface and receive operation commands generated by the user interacting with the graphical user interface.

[0271] The radio frequency circuit 504 can be used to transmit and receive radio frequency signals to establish wireless communication with network devices or other electronic devices, and to transmit and receive signals with network devices or other electronic devices.

[0272] Audio circuitry 505 can be used to provide an audio interface between a user and an electronic device via a speaker and a microphone. Audio circuitry 505 converts received audio data into electrical signals, transmits them to the speaker, and the speaker converts them into sound signals for output. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuitry 505, converted back into audio data, and then processed by processor 501 before being transmitted via radio frequency circuitry 504 to, for example, another electronic device, or output to memory 502 for further processing. Audio circuitry 505 may also include an earphone jack to facilitate communication between peripheral headphones and electronic devices.

[0273] The input unit 506 can be used to receive input numbers, characters, or user characteristic information (such as fingerprints, iris, facial information, etc.), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control.

[0274] Power supply 507 is used to supply power to various components of electronic device 500. Optionally, power supply 507 can be logically connected to processor 501 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. Power supply 507 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0275] although Figure 5 As not shown in the diagram, the electronic device 500 may also include a camera, sensor, wireless fidelity module, Bluetooth module, etc., which will not be described in detail here.

[0276] 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.

[0277] As can be seen from the above, the electronic device provided in this embodiment acquires the volume data of the printing nozzles when printing material, classifies the printing nozzles based on the volume data, and then controls the printing nozzles based on the category of the printing nozzles, which can make the thickness of the formed film layer more consistent. Therefore, this solution can improve the stability of the device.

[0278] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0279] Therefore, embodiments of this application provide a computer-readable storage medium storing a plurality of computer programs that can be loaded by a processor to execute the steps in any of the film printing methods provided in embodiments of this application. For example, the computer program can execute the following steps:

[0280] Obtain volume data of the printing nozzles of the printing device when printing material;

[0281] Based on the volume data of the printing nozzle when printing material, the printing nozzles are classified to obtain the category of printing nozzle;

[0282] Based on the type of printing nozzle, the printing nozzle is controlled to print material on the substrate in order to form a film layer.

[0283] In some embodiments, the computer program may also perform the following steps:

[0284] The unit to be printed in the substrate is divided into multiple sub-regions to obtain the unit to be printed;

[0285] The printer nozzles of the printer are controlled to print material into sub-regions in order to form a film.

[0286] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0287] The storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0288] Since the computer program stored in the storage medium can execute the steps in any of the film printing methods provided in the embodiments of this application, the beneficial effects that any of the film printing methods provided in the embodiments of this application can achieve can be realized. For details, please refer to the previous embodiments, which will not be repeated here.

[0289] The foregoing has provided a detailed description of a film printing method, apparatus, storage medium, and electronic device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A film layer printing method, characterized in that, include: The unit to be printed in the substrate is divided into multiple sub-regions to obtain the unit to be printed; The volume data of the printing nozzle of the printing device when printing material is obtained includes the volume standard deviation obtained based on statistics of multiple printings. The printing nozzles are classified based on the volume standard deviation to obtain a stable category of the printing nozzles; The printing nozzles of printing devices with different stability categories are controlled to print material into the sub-region in order to form a film layer.

2. The film printing method as described in claim 1, characterized in that, The step of partitioning the unit to be printed to obtain multiple sub-regions of the unit to be printed includes: Obtain the size information of the unit to be printed in the substrate; Based on the size information, the unit to be printed in the substrate is divided into multiple sub-regions of the unit to be printed.

3. The film printing method as described in claim 2, characterized in that, The size information includes the printable area of ​​the unit to be printed. The step of partitioning the unit to be printed based on the size information to obtain multiple sub-regions of the unit to be printed includes: Determine the printing area when the printing nozzle prints material, wherein the printing area is the area formed by the material in the unit to be printed when the printing nozzle prints the material into the unit to be printed; Based on the area to be printed and the printing area, the unit to be printed is divided into multiple sub-regions of the unit to be printed.

4. The film printing method as described in claim 3, characterized in that, The step of partitioning the unit to be printed based on the area to be printed and the printing area to obtain multiple sub-regions of the unit to be printed, including: Determine the quotient of the area to be printed and the area to be printed; The unit to be printed is divided into multiple sub-regions according to the quotient.

5. The film printing method according to any one of claims 2-4, characterized in that, When the substrate is a display device substrate, the unit to be printed is the pixel pit corresponding to the sub-pixel on the display device substrate.

6. The film printing method as described in claim 1, characterized in that, After partitioning the unit to be printed to obtain multiple sub-regions of the unit to be printed, the method further includes: The sub-regions are classified to obtain their region categories; Controlling the printing nozzles of printing devices with different stability categories to print material into the sub-region includes: Control the printing nozzles corresponding to the stability category to print material into the sub-regions corresponding to the region category.

7. The film printing method as described in claim 1, characterized in that, The volume data obtained when the printing nozzle of the printing device prints material includes: Obtain at least one sample volume corresponding to each printing nozzle of the printing device, wherein the sample volume is the total volume of the material printed by the printing nozzle a preset number of times, and the preset number of times is at least greater than or equal to 2; Statistical analysis was performed on the sample volume to obtain the volume data of the printing nozzle when printing material.

8. The film printing method as described in claim 7, characterized in that, The volume data includes the volume standard deviation and the volume mean. The statistical analysis of the sample volume to obtain the volume data of the printing nozzle during material printing includes: Based on the sample volume and the preset number of times, determine the average volume corresponding to the printing nozzle; Based on the average volume and the actual volume of each print, the standard deviation of the volume corresponding to the print nozzle is determined.

9. The film printing method according to any one of claims 1 to 8, characterized in that, The stability categories include a first stable subclass, a second stable subclass, a third stable subclass, and an unstable subclass. The classification of printing nozzles based on the volume standard deviation to obtain the stability category of the printing nozzles includes: When the volume standard deviation is not greater than the first standard deviation threshold, the stability category of the printing nozzle is determined as the first stability subclass; When the volume standard deviation is greater than the first standard deviation threshold and not greater than the second standard deviation threshold, the stability category of the printing nozzle is determined to be the second stability subclass; When the volume standard deviation is greater than the second standard deviation threshold but not greater than the third standard deviation threshold, the stability category of the printing nozzle is determined to be the third stability subclass; When the volume standard deviation is greater than the third standard deviation threshold, the stability category of the printing nozzle is determined to be the unstable subclass.

10. The film printing method as described in claim 2, characterized in that, The substrate includes alignment markers, and obtaining the size information of the unit to be printed in the substrate includes: Acquire an image of a target area, which is a region within a preset range of the alignment mark, and the target area includes at least one unit to be printed; The size information of the unit to be printed is identified based on the image of the target area.

11. The film printing method as described in claim 10, characterized in that, The position of the alignment marker is the origin, and the method further includes: The relative distance between the units to be printed is determined based on the image of the target area; Based on the size information and the relative distance, determine the center point coordinates of the unit to be printed; Based on the center point coordinates of the unit to be printed, determine the center point coordinates of the sub-region; The control of the printing nozzles of the printing device to print material into the sub-region includes: The printing nozzle is controlled to align with the center point coordinates of the sub-region, and the material is printed into the sub-region.

12. A film layer printing apparatus, characterized in that, include: A partitioning unit is used to partition the unit to be printed, thereby obtaining multiple sub-regions of the unit to be printed; A volume acquisition unit is used to acquire volume data of the printing nozzle of the printing device when printing material, the volume data including the volume standard deviation obtained based on statistics of multiple printings; A classification unit is used to classify the printing nozzles based on the volume standard deviation to obtain a stable category of the printing nozzles; A region control unit is used to control the printing nozzles of printing devices with different stability categories to print material into the sub-region in order to form a film layer.

13. An electronic device, characterized in that, The method includes a processor and a memory, the memory storing multiple instructions; the processor loads instructions from the memory to perform the steps in the film printing method as described in any one of claims 1 to 11.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a plurality of instructions adapted for loading by a processor to perform the steps of the film printing method according to any one of claims 1 to 11.

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