An inkjet printing method, apparatus, device and storage medium

Abstract

Embodiments of the present application relate to the display field, and relate to an inkjet printing method, comprising: in response to a received inkjet printing instruction, respectively controlling a first nozzle to print initial ink in a pixel pit of a substrate and a second nozzle to print a first solvent in the pixel pit to form mixed ink; wherein an actual ink drop volume printed by the first nozzle is less than an actual ink drop volume printed by the second nozzle, and the initial ink comprises a solute and a second solvent. The present application also provides an inkjet printing device, equipment and a storage medium. The present application effectively improves printing efficiency.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to an inkjet printing method, apparatus, device and storage medium. Background Technology

[0002] In current inkjet printing, due to insufficient hydrophilicity within the pixel pits or material residue during pixel pit formation, a larger ink print volume is required to complete the ink spreading within the pixel pits. However, a larger print volume of ink also means more print drops, longer printing time, and lower printing efficiency. Furthermore, if a printhead with a larger single print volume is used, it will be difficult to flexibly control the single print volume. Summary of the Invention

[0003] At least one embodiment of this application provides an inkjet printing method, apparatus, device, and storage medium to solve the problem of low printing efficiency in the prior art.

[0004] To address the aforementioned technical problems, at least one embodiment of this application provides an inkjet printing method, employing the technical solution described below:

[0005] In response to the received inkjet printing command, the first printhead is controlled to print initial ink in the pixel pits of the substrate and the second printhead is controlled to print first solvent in the pixel pits to form mixed ink.

[0006] Wherein, the actual ink droplet volume printed by the first printhead is smaller than the actual ink droplet volume printed by the second printhead, and the initial ink includes a solute and a second solvent.

[0007] Furthermore, before the steps of respectively controlling the first printhead to print initial ink in the pixel pits of the substrate and the second printhead to print the first solvent in the pixel pits, the method further includes:

[0008] Obtain the total printing volume corresponding to the pixel pit, and the rated ink droplet volume corresponding to the first printhead and the second printhead respectively;

[0009] Based on the total printing volume and the rated ink droplet volume corresponding to the first printhead and the second printhead respectively, determine the number of printing drops and the actual ink droplet volume corresponding to the first printhead and the second printhead respectively;

[0010] The printing drop count and the actual ink drop volume corresponding to the first printhead and the second printhead are combined to form printing parameters;

[0011] The steps of responding to the received inkjet printing command and controlling the first printhead to print initial ink in the pixel pits of the substrate and the second printhead to print the first solvent in the pixel pits include:

[0012] In response to the received inkjet printing command, the printing parameters are obtained;

[0013] According to the printing parameters, the first printhead is controlled to print initial ink in the pixel pits of the substrate, and the second printhead is controlled to print the first solvent in the pixel pits.

[0014] Furthermore, the step of determining the number of printed drops and the actual droplet volume corresponding to the first printhead and the second printhead respectively, based on the total printing volume and the rated droplet volume corresponding to the first printhead and the second printhead respectively, includes:

[0015] Obtain the pixel type corresponding to the pixel pit;

[0016] The initial ink printing volume corresponding to the first printhead is determined based on the total printing volume and the pixel type.

[0017] Based on the initial ink printing volume and the rated ink droplet volume of the first printhead, the number of printing drops of the first printhead is determined, and the rated ink droplet volume of the first printhead is determined as the actual ink droplet volume of the first printhead;

[0018] Based on the total print volume and the initial ink print volume, the first solvent print volume corresponding to the second printhead is determined. Based on the first solvent print volume and the rated droplet volume of the second printhead, the number of print drops of the second printhead is determined, and the rated droplet volume of the second printhead is determined as the actual droplet volume of the second printhead.

[0019] Furthermore, the step of determining the rated droplet volume of the first printhead as the actual droplet volume of the first printhead includes: if the number of print drops of the first printhead is not an integer, obtaining a first voltage waveform corresponding to the first printhead, adjusting the rated droplet volume of the first printhead according to the first voltage waveform to obtain the actual droplet volume of the first printhead; and / or,

[0020] The step of determining the rated ink droplet volume of the second printhead as the actual ink droplet volume of the second printhead includes: if the number of print drops of the second printhead is not an integer, obtaining the second voltage waveform corresponding to the second printhead, adjusting the rated ink droplet volume of the second printhead according to the second voltage waveform, and obtaining the actual ink droplet volume of the second printhead.

[0021] Furthermore, the steps of respectively controlling the first printhead to print initial ink in the pixel pits of the substrate and the second printhead to print the first solvent in the pixel pits include:

[0022] The first printhead is controlled to print the initial ink on the first printing area of ​​the pixel pit, and the second printhead is controlled to print the first solvent on the second printing area of ​​the pixel pit;

[0023] The second printing area is located at the edge of the first printing area.

[0024] Furthermore, there is one first nozzle and two second nozzles, with the first nozzle positioned between the two second nozzles.

[0025] Furthermore, the ratio of the actual ink droplet volume printed by the second printhead to the actual ink droplet volume printed by the first printhead is 2 to 13; and / or,

[0026] The ratio of the rated droplet volume printed by the first printhead to the actual droplet volume printed by the first printhead is 0.7 to 1.3; and / or,

[0027] The ratio of the rated droplet volume printed by the second printhead to the actual droplet volume printed by the second printhead is 0.7 to 1.3; and / or,

[0028] The second solvent may be the same as or different from the first solvent.

[0029] To address the aforementioned technical problems, at least one embodiment of this application provides an inkjet printing device, employing the technical solution described below:

[0030] An inkjet printing module is used to respond to a received inkjet printing command and control a first printhead to print initial ink in a pixel pit on a substrate and a second printhead to print a first solvent in the pixel pit to form a mixed ink; wherein the actual ink droplet volume printed by the first printhead is smaller than the actual ink droplet volume printed by the second printhead, and the initial ink includes a solute and a second solvent.

[0031] To address the aforementioned technical problems, at least one embodiment of this application provides an inkjet printing device, employing the following technical solution: including:

[0032] A control mechanism, including a memory and a processor, wherein the memory stores readable instructions, and the processor, when executing the readable instructions, implements the steps of the inkjet printing method as described above; and

[0033] The printing mechanism includes at least one first printhead and at least one second printhead, both of which are electrically connected to the processor. The actual ink droplet volume printed by the first printhead is smaller than the actual ink droplet volume printed by the second printhead.

[0034] Furthermore, the first printhead is used to print on the first printing area of ​​the pixel pit, and the second printhead is used to print on the second printing area of ​​the pixel pit, the second printing area being located at the edge of the first printing area.

[0035] Furthermore, there is one first nozzle and two second nozzles, with the first nozzle positioned between the two second nozzles.

[0036] To address the aforementioned technical problems, at least one embodiment of this application provides a computer-readable storage medium, employing the technical solution described below:

[0037] The computer-readable storage medium stores computer-readable instructions, which, when executed by a processor, implement the steps of the inkjet printing method as described above.

[0038] Compared with the prior art, the embodiments of this application have the following main advantages: by responding to the received inkjet printing command, the first printhead is controlled to print initial ink in the pixel pits of the substrate, and the second printhead is controlled to print a first solvent in the pixel pits to form a mixed ink; wherein, the actual ink droplet volume printed by the first printhead is smaller than the actual ink droplet volume printed by the second printhead, and the initial ink includes a solute and a second solvent. The first and second printheads with different actual ink droplet volumes in this application can be flexibly combined to achieve flexible control of inkjet printing, while solving the problem of long printing time due to excessive droplet count in the prior art, thus improving printing efficiency. Attached Figure Description

[0039] To more clearly illustrate the solutions in this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is an exemplary system architecture diagram to which this application can be applied;

[0041] Figure 2 A flowchart of an embodiment of the inkjet printing method according to this application;

[0042] Figure 3 This is a schematic diagram of the structure of one embodiment of the inkjet printing apparatus according to this application;

[0043] Figure 4 This is a schematic diagram of a control mechanism in an inkjet printing device according to an embodiment of the present application;

[0044] Figure 5 This is a schematic diagram of the structure of one embodiment of the printing mechanism in the inkjet printing apparatus according to this application. Detailed Implementation

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application, are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0046] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0048] like Figure 1 As shown, system architecture 100 may include terminal devices 101, 102, and 103, a network 104, and a server 105. Network 104 serves as the medium for providing communication links between terminal devices 101, 102, and 103 and server 105. Network 104 may include various connection types, such as wired or wireless communication links, or fiber optic cables, etc.

[0049] Users can use terminal devices 101, 102, and 103 to interact with server 105 via network 104 to receive or send messages, etc. Various communication client applications can be installed on terminal devices 101, 102, and 103, such as web browser applications, shopping applications, search applications, instant messaging tools, email clients, social media platform software, etc.

[0050] Terminal devices 101, 102, and 103 can be various electronic devices with displays and support web browsing, including but not limited to smartphones, tablets, e-book readers, MP3 players (Moving Picture Experts Group Audio Layer III), MP4 players (Moving Picture Experts Group Audio Layer IV), laptops, and desktop computers, etc.

[0051] Server 105 can be a server that provides various services, such as a backend server that supports the pages displayed on terminal devices 101, 102, and 103.

[0052] It should be noted that the inkjet printing method provided in this application embodiment is generally executed by a server / terminal device, and correspondingly, the inkjet printing device is generally located in the server / terminal device.

[0053] It should be understood that Figure 1 The number of terminal devices, networks, and servers shown is merely illustrative. Depending on implementation needs, any number of terminal devices, networks, and servers can be included.

[0054] Continue to refer to Figure 2 A flowchart illustrating an embodiment of the inkjet printing method according to this application is shown. The inkjet printing method includes the following steps:

[0055] Step 201: In response to the received inkjet printing command, control the first printhead to print initial ink in the pixel pits of the substrate and the second printhead to print the first solvent in the pixel pits to form mixed ink; wherein, the actual ink droplet volume printed by the first printhead is smaller than the actual ink droplet volume printed by the second printhead, and the initial ink includes a solute and a second solvent.

[0056] In this embodiment, the inkjet printing command can be generated by the operator after operating the terminal device. The actual ink droplet volume is the volume of one ink droplet printed by the first printhead / second printhead.

[0057] The inkjet printing method of this application operates on electronic devices (e.g., Figure 1The server / terminal device shown can receive inkjet printing commands via wired or wireless connection. It should be noted that the aforementioned wireless connection methods may include, but are not limited to, 3G / 4G connections, WiFi connections, Bluetooth connections, WiMAX connections, Zigbee connections, UWB (ultra wideband) connections, and other currently known or future known wireless connection methods.

[0058] In step S201, since the first solvent has a smaller impact on the film thickness after film formation compared to the initial ink, a first printhead with an actual droplet volume smaller than that of the second printhead can be selected. This allows for precise control of the initial ink printing volume of the first printhead, while also relaxing the selection restrictions for the second printhead, reducing the selection process and difficulty. Furthermore, compared to existing printheads with the same actual droplet volume, the first and second printheads with different actual droplet volumes in this application can be flexibly combined to achieve flexible control of inkjet printing. This also solves the problem of long printing time due to excessive droplet count in the prior art, thus improving printing efficiency.

[0059] For example, the formula for calculating the number of drops printed by an existing printhead is: D A =Y / NX0, where the above D A Let Y be the number of droplets printed by the existing printhead, N be the total print volume, and X0 be the number of existing printheads. The initial ink concentration of the ink for the total print volume Y printed by the existing printheads is m.

[0060] The formula for calculating the number of printing drops for the printhead in this application is: D B =Y / (n*X1+X2), where D above B Let Y be the number of droplets printed by the first printhead / second printhead, n be the ratio of the number of second printheads to the number of first printheads, N = n-1, X1 be the actual droplet volume of the second printhead, and X2 be the actual droplet volume of the first printhead; wherein the mixed ink concentration of the total printing volume Y of the first and second printheads in this application is M, and the relationship between the mixed ink concentration M of this application and the initial ink concentration m of existing inks is M = (N*X1 / X2+1)m.

[0061] When the total print volume Y is 48 pL, the actual droplet volume X0 of the existing printhead is 4 pL, the actual droplet volume X1 of the second printhead of this application is 10 pL, and the actual droplet volume X0 of the first printhead of this application is 4 pL; if the number of existing printheads is three, the number of print drops D required to complete the printing of a total print volume of 48 pL is... AThe number of drops required to complete a total print volume of 48 pL is 4 drops [48 pL / (4 pL * 3)]. In this application, there is one first printhead and two second printheads, and the number of print drops D required to complete a total print volume of 48 pL is... B For 2 drops [48pL / (2*10pL+4pL)], the relationship between the mixed ink concentration M of this application and the initial ink concentration m of the existing ink is M=6m.

[0062] As can be seen, compared with existing printing methods, this application uses fewer printing drops to print the same total printing volume of ink, effectively shortening the printing time and avoiding the phenomenon of unstable printing of the first and second printheads due to excessive printing drops. At the same time, this application increases the concentration of mixed ink to achieve better control of film thickness after drying.

[0063] In some embodiments, the first and second printheads print simultaneously to avoid excessively high initial ink concentration, which would cause the pixel pits to dry too quickly and hinder the mixing of the initial ink and the first solvent. After printing, the first solvent mixes and diffuses with the initial ink within the pixel pits, resulting in a uniform distribution of the initial ink within the pixel pits in the resulting mixed ink. This makes the evaporation rate at different locations on the pixel pits tend to be consistent during the drying process, thereby improving the consistency of the film thickness.

[0064] In some embodiments, the first printhead and the second printhead do not print simultaneously, thus staggering the printing of the first printhead and the second printhead to meet different printing needs and making it widely applicable.

[0065] In some embodiments, the substrate is provided with a pixel defining layer that defines at least one pixel pit; in practical applications, the first printhead and the second printhead perform inkjet printing within the pixel pit to form mixed ink.

[0066] In some embodiments, after inkjet printing, pixel units are formed on the pixel pits, wherein the pixel unit includes at least one sub-pixel unit, which is one of a red pixel unit, a blue pixel unit, and a green pixel unit.

[0067] For example, if the pixel unit mentioned above includes sub-pixel units, then the pixel unit corresponds to the sub-pixel units; or if the pixel unit mentioned above includes at least two sub-pixel units, then at least two sub-pixel units form a pixel unit, and the color of each sub-pixel unit may be the same or different.

[0068] In some embodiments, when the pixel defining layer defines at least two pixel pits, the first printhead and the second printhead can be sequentially controlled to print mixed ink to each pixel pit according to the above-described step S201 of this application.

[0069] In some optional implementations of this embodiment, step S201, before the steps of controlling the first printhead to print initial ink in the pixel pits of the substrate and the second printhead to print the first solvent in the pixel pits, further includes:

[0070] Obtain the total printing volume corresponding to the pixel pit, and the rated ink droplet volume corresponding to the first printhead and the second printhead respectively;

[0071] Based on the total printing volume and the rated ink droplet volume corresponding to the first printhead and the second printhead respectively, determine the number of printing drops and the actual ink droplet volume corresponding to the first printhead and the second printhead respectively;

[0072] The printing drop count and the actual ink drop volume corresponding to the first printhead and the second printhead are combined to form the printing parameters.

[0073] Step S201 above, the step of responding to the received inkjet printing command and controlling the first printhead to print initial ink in the pixel pits of the substrate and the second printhead to print the first solvent in the pixel pits, includes:

[0074] In response to the received inkjet printing command, the printing parameters are obtained;

[0075] According to the printing parameters, the first printhead is controlled to print initial ink in the pixel pits of the substrate, and the second printhead is controlled to print the first solvent in the pixel pits.

[0076] In this embodiment, the total print volume refers to the total volume of the target print; the rated droplet volume refers to the droplet volume printed by the first printhead / second printhead by default; and the number of print drops refers to the number of droplets to be printed by the first printhead / second printhead.

[0077] Before inkjet printing, the number of printable drops and the actual droplet volume corresponding to the first printhead and the second printhead are determined to obtain printing parameters. The first printhead and the second printhead are then controlled to print according to the printing parameters to ensure the printing accuracy of the first printhead and the second printhead.

[0078] In some optional implementations of this embodiment, the step of determining the number of print drops and the actual droplet volume corresponding to the first print head and the second print head respectively, based on the total print volume and the rated droplet volume corresponding to the first print head and the second print head respectively, includes:

[0079] Obtain the pixel type corresponding to the pixel pit;

[0080] The initial ink printing volume corresponding to the first printhead is determined based on the total printing volume and the pixel type.

[0081] Based on the initial ink printing volume and the rated ink droplet volume of the first printhead, the number of printing drops of the first printhead is determined, and the rated ink droplet volume of the first printhead is determined as the actual ink droplet volume of the first printhead;

[0082] Based on the total print volume and the initial ink print volume, the first solvent print volume corresponding to the second printhead is determined. Based on the first solvent print volume and the rated droplet volume of the second printhead, the number of print drops of the second printhead is determined, and the rated droplet volume of the second printhead is determined as the actual droplet volume of the second printhead.

[0083] In this embodiment, the pixel type can be any one of red, blue, or green pixel types. Since the required film thicknesses for the three pixel types are different, their corresponding total print volume and initial ink print volume are also different. Therefore, initially, the initial ink print volume corresponding to the red, blue, and green pixel types under different total print volumes is set, and the correspondence between pixel type, total print volume, and initial ink print volume is established.

[0084] In the step of calculating the number of print drops of the first printhead, the number of print drops of the first printhead is calculated by dividing the initial ink print volume by the rated ink droplet volume of the first printhead.

[0085] In the step of calculating the first solvent printing volume, the first solvent printing volume is obtained by subtracting the total printing volume from the initial ink printing volume. In some embodiments, if the number of second printheads is n, the calculated first solvent printing volume needs to be divided by n to obtain the first solvent printing volume corresponding to each second printhead.

[0086] In the step of calculating the number of print drops for the second printhead, the number of print drops for the second printhead is calculated by dividing the initial ink print volume by the rated droplet volume of the second printhead. In some embodiments, if the number of second printheads is n, the calculated first solvent print volume needs to be divided by n to obtain the number of print drops for each second printhead.

[0087] In some optional implementations of this embodiment, the step of determining the rated droplet volume of the first printhead as the actual droplet volume of the first printhead includes:

[0088] Determine whether the number of drops printed by the first nozzle is an integer;

[0089] If the number of print drops from the first printhead is an integer, then the step of using the rated droplet volume of the first printhead as the actual droplet volume of the first printhead is executed.

[0090] If the number of print drops from the first printhead is not an integer, obtain the first voltage waveform corresponding to the first printhead, adjust the rated ink droplet volume of the first printhead according to the first voltage waveform, and obtain the actual ink droplet volume of the first printhead.

[0091] In this embodiment, the ability to print normally is determined by whether the number of print drops from the first printhead is an integer. If the number of print drops from the first printhead is an integer, it indicates that printing is possible. If the number of print drops from the first printhead is not an integer, it indicates that printing is not possible. In this case, the rated drop volume of the first printhead needs to be adjusted using the first voltage waveform, and the number of print drops from the first printhead is recalculated based on the adjusted rated drop volume until the calculated number of print drops is an integer. This ensures normal printing by the first printhead, and the rated drop volume of the first printhead when printing is possible is then used as the actual drop volume.

[0092] In some embodiments, initially, a voltage value is selected from the user-input voltage range [v1, vn] and a time value is selected from the time range [t1, tn]. The selected voltage and time values ​​are combined to form a set of "voltage-time" data, and a voltage waveform is generated using this set of "voltage-time" data. The above steps for generating the first voltage waveform are repeated to obtain multiple first voltage waveforms. For example, v1 and v2 are selected from the voltage range [v1, vn], and t1 and t2 are selected from the time range [t1, tn]. Any one of "v1, v2" is combined with any one of "t1, t2" to obtain 4 sets of "voltage-time" data, generating 4 first voltage waveforms.

[0093] In some optional implementations of this embodiment, the step of determining the rated droplet volume of the second printhead as the actual droplet volume of the second printhead includes:

[0094] Determine whether the number of drops printed by the second nozzle is an integer;

[0095] If the number of print drops from the second printhead is an integer, then the step of using the rated droplet volume of the second printhead as the actual droplet volume of the second printhead is executed.

[0096] If the number of print drops from the second printhead is not an integer, obtain the second voltage waveform corresponding to the second printhead, adjust the rated ink drop volume of the second printhead according to the second voltage waveform, and obtain the actual ink drop volume of the second printhead.

[0097] In this embodiment, the ability to print normally is determined by whether the number of print drops from the second printhead is an integer. If the number of print drops from the second printhead is an integer, it indicates that printing is possible. If the number of print drops from the second printhead is not an integer, it indicates that printing is not possible. In this case, the rated drop volume of the second printhead needs to be adjusted using the second voltage waveform, and the number of print drops from the second printhead is recalculated based on the adjusted rated drop volume until the calculated number of print drops is an integer. This ensures normal printing by the second printhead, and the rated drop volume of the second printhead when printing is possible is then used as the actual drop volume.

[0098] In some embodiments, initially, a voltage value is selected from the user-input voltage range [v1, vn] and a time value is selected from the time range [t1, tn]. The selected voltage and time values ​​are combined to form a set of "voltage-time" data, and a voltage waveform is generated using this set of "voltage-time" data. The above steps for generating the second voltage waveform are repeated to obtain multiple second voltage waveforms. For example, v1 and v2 are selected from the voltage range [v1, vn], and t1 and t2 are selected from the time range [t1, tn]. Any one of "v1, v2" is combined with any one of "t1, t2" to obtain 4 sets of "voltage-time" data, generating 4 second voltage waveforms.

[0099] In some optional implementations of this embodiment, step S202, which involves controlling the first printhead to print initial ink within the pixel pits of the substrate and the second printhead to print the first solvent within the pixel pits, includes:

[0100] The first printhead is controlled to print the initial ink on the first printing area of ​​the pixel pit, and the second printhead is controlled to print the first solvent on the second printing area of ​​the pixel pit;

[0101] The second printing area is located at the edge of the first printing area.

[0102] In this embodiment, since the first solvent has a smaller impact on the film thickness after film formation compared to the initial ink, the first solvent is printed on the second printing area by the second nozzle, and the initial ink is printed on the first printing area within the second printing area by the first nozzle whose actual ink droplet volume is smaller than that of the second nozzle. This allows the initial ink on the first printing area to diffuse in all directions, ensuring the flow rate of the initial ink to the second printing area, thereby ensuring the uniformity of the initial ink diffusion and thus ensuring the film quality.

[0103] In some embodiments, the edge region of the first printing area is adjacent to or overlaps with the edge region of the second printing area; the overlapping arrangement is relative to the adjacent first and second printing areas. During the printing process, the second nozzle can cover the overlapping area on the first printing area and the first nozzle can cover the overlapping area on the second printing area, thereby improving the diffusion efficiency of the initial ink in the pixel pit, and thus improving the fusion efficiency of the initial ink and the first solvent.

[0104] In some embodiments, in inkjet printing of a substrate with multiple pixel pits, more first solvent can be printed on the pixel pits at the edge of the substrate. During the drying and film formation process, the difference in evaporation rate of the mixed ink on the pixel pits at the edge and center of the substrate is reduced, so that the atmosphere concentration in the center and edge of the substrate tends to be consistent, thereby making the evaporation rate of the first solvent and the second solvent on the entire substrate approximately consistent, thereby ensuring that the film thickness of the formed film is uniform.

[0105] In some optional implementations of this embodiment, the number of first nozzles is one, the number of second nozzles is two, and the first nozzle is disposed between the two second nozzles.

[0106] In this embodiment, the first printhead prints initial ink on the first printing area of ​​the pixel pit, and the two second printheads print first solvent on the second printing areas on both sides of the first printing area. This allows the initial ink to diffuse from the first printing area to the second printing area, and the initial ink can fuse with the first solvent on both sides, thereby improving the fusion efficiency of the initial ink and the first solvent, and ensuring the uniformity of fusion of the initial ink and the first solvent in all directions within the pixel pit, thus ensuring the film quality.

[0107] In some optional implementations of this embodiment, the ratio of the actual ink droplet volume of the second printhead to the actual ink droplet volume of the first printhead is 2 to 13. This avoids the phenomenon that if the ratio is less than 2, the actual ink droplet volume difference between the first and second printheads is small, making it impossible to flexibly combine them according to usage requirements and resulting in slow printing efficiency. It also avoids the phenomenon that if the ratio is greater than 13, the actual ink droplet volume difference between the first and second printheads is too large, resulting in an excessively high initial ink concentration when printing with the first printhead, which is not conducive to the mixing and diffusion of ink and the first solvent.

[0108] Optionally, the ratio of the actual droplet volume of the second printhead to the actual droplet volume of the first printhead is selected from one or a range formed by two of the following: 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, and 13.

[0109] In some optional implementations of this embodiment, the ratio of the rated ink droplet volume printed by the first printhead to the actual ink droplet volume printed by the first printhead is 0.7 to 1.3. This is to avoid abnormal phenomena such as the first printhead ejecting multiple ink droplets at a time or the ink droplet falling direction deviating from the preset direction during the printing process, thus ensuring inkjet printing accuracy.

[0110] Optionally, the ratio of the rated droplet volume printed by the first printhead to the actual droplet volume printed by the first printhead is selected from 0.7, 0.8, 0.9, 1, 1.1, 1.2, and 1.3.

[0111] In some optional implementations of this embodiment, the ratio of the rated ink droplet volume printed by the second printhead to the actual ink droplet volume printed by the second printhead is 0.7 to 1.3. This is to avoid abnormal phenomena such as multiple ink droplets being ejected at once or the ink droplet falling direction deviating from the preset direction during the printing process, thus ensuring inkjet printing accuracy.

[0112] Optionally, the ratio of the rated droplet volume printed by the second printhead to the actual droplet volume printed by the second printhead is selected from 0.7, 0.8, 0.9, 1, 1.1, 1.2, and 1.3.

[0113] In some optional implementations of this embodiment, in the step of controlling the first printhead to print initial ink in the pixel pit and the second printhead to print the first solvent in the pixel pit according to the printing parameters: the second solvent in the initial ink may be the same as or different from the first solvent.

[0114] In this embodiment, the same second solvent is used in contrast to different second solvents and first solvents to facilitate the mixing of the initial ink with the first solvent, thereby improving the mixing uniformity and mixing efficiency. It also facilitates material preparation and improves the overall printing efficiency.

[0115] In some embodiments, the first solvent is an organic solvent such as an alcohol or an ester.

[0116] In some embodiments, the second solvent is an organic solvent such as an alcohol or an ester.

[0117] In some optional implementations of this embodiment, step S201, after the steps of controlling the first printhead to print initial ink in the pixel pits of the substrate and the second printhead to print the first solvent in the pixel pits to form mixed ink, further includes:

[0118] The mixed ink is dried to form a thin film.

[0119] In this embodiment, the above-mentioned drying method may be vacuum drying, baking drying, etc., and is not specifically limited here.

[0120] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This computer program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The aforementioned storage medium can be a non-volatile storage medium such as a magnetic disk, optical disk, or read-only memory (ROM), or random access memory (RAM).

[0121] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0122] Further reference Figure 3 As a response to the above Figure 2 The present application provides an embodiment of an inkjet printing apparatus to implement the method shown, which is similar to... Figure 2Corresponding to the method embodiments shown, this device can be specifically applied to various electronic devices.

[0123] like Figure 4 As shown, the inkjet printing device 300 described in this embodiment includes an inkjet printing module 301.

[0124] in:

[0125] The inkjet printing module 301 is used to respond to the received inkjet printing command and control the first printhead to print initial ink in the pixel pit of the substrate and the second printhead to print a first solvent in the pixel pit to form a mixed ink; wherein the actual ink droplet volume printed by the first printhead is smaller than the actual ink droplet volume printed by the second printhead, and the initial ink includes a solute and a second solvent.

[0126] This embodiment has the following beneficial effects: (1) The first printhead and the second printhead are controlled to print at the same time to avoid the initial ink concentration being too high, which would cause the pixel pit to dry too quickly and be unfavorable to the mixing of the initial ink and the first solvent; the first solvent and the initial ink after printing are mixed and diffused in the pixel pit, so that the initial ink in the mixed ink formed by the two is evenly distributed in the pixel pit, so that the evaporation rate of each position on the pixel pit tends to be consistent during the drying process, thereby improving the consistency of the film thickness. (2) Since the first solvent has a smaller impact on the thickness of the film formed after film formation compared to the initial ink, the first printhead can be selected with an actual ink droplet volume smaller than that of the second printhead. This allows for precise control of the initial ink printing volume of the first printhead, while also relaxing the selection restrictions of the second printhead, reducing the screening process and difficulty of the second printhead. Furthermore, compared to existing printheads with the same actual ink droplet volume, the first and second printheads with different actual ink droplet volumes in this application can be flexibly combined to achieve flexible control of inkjet printing. This also solves the problem of long printing time caused by excessive number of printing droplets in the prior art, thus improving printing efficiency.

[0127] In some optional implementations of this embodiment, the inkjet printing module 301 includes a volume acquisition submodule, a first determination submodule, and a merging submodule. Wherein:

[0128] The volume acquisition submodule is used to acquire the total printing volume corresponding to the pixel pit, and the rated ink droplet volume corresponding to the first printhead and the second printhead respectively;

[0129] The first determining submodule is used to determine the number of printed drops and the actual ink drop volume corresponding to the first printhead and the second printhead respectively, based on the total printing volume and the rated ink drop volume corresponding to the first printhead and the second printhead respectively.

[0130] The merging submodule is used to merge the number of printed drops and the actual ink drop volume corresponding to the first printhead and the second printhead respectively to form printing parameters.

[0131] The inkjet printing module 301 also includes a parameter acquisition submodule and a first printing submodule. Wherein:

[0132] The parameter acquisition submodule is used to acquire the printing parameters in response to the received inkjet printing command;

[0133] The first printing submodule is used to control the first printhead to print initial ink in the pixel pits of the substrate and the second printhead to print the first solvent in the pixel pits according to the printing parameters.

[0134] In some optional implementations of this embodiment, the first determining submodule includes a type acquisition unit, a first determining unit, a second determining unit, and a third determining unit. Wherein:

[0135] A type acquisition unit is used to acquire the pixel type corresponding to the pixel pit;

[0136] The first determining unit is used to determine the initial ink printing volume corresponding to the first printhead based on the total printing volume and the pixel type.

[0137] The second determining unit is used to determine the number of print drops of the first print head based on the initial ink printing volume and the rated ink drop volume of the first print head, and to determine the rated ink drop volume of the first print head as the actual ink drop volume of the first print head.

[0138] The third determining unit is used to determine the first solvent printing volume corresponding to the second printhead based on the total printing volume and the initial ink printing volume, determine the number of printing drops of the second printhead based on the first solvent printing volume and the rated ink droplet volume of the second printhead, and determine the rated ink droplet volume of the second printhead as the actual ink droplet volume of the second printhead.

[0139] In some optional implementations of this embodiment, the second determining unit includes a first adjusting subunit and / or a second adjusting subunit. Wherein:

[0140] The first adjustment unit is used to obtain the first voltage waveform corresponding to the first printhead when the number of printing drops of the first printhead is not an integer, and adjust the rated ink drop volume of the first printhead according to the first voltage waveform to obtain the actual ink drop volume of the first printhead.

[0141] The second adjustment unit is used to obtain the second voltage waveform corresponding to the second printhead when the number of print drops of the second printhead is not an integer, and adjust the rated ink drop volume of the second printhead according to the second voltage waveform to obtain the actual ink drop volume of the second printhead.

[0142] In some optional implementations of this embodiment, the inkjet printing module 301 includes a second printing submodule. Wherein:

[0143] The second printing submodule is used to control the first printhead to print the initial ink on the first printing area of ​​the pixel pit, and to control the second printhead to print the first solvent on the second printing area of ​​the pixel pit; wherein the second printing area is located at the edge of the first printing area.

[0144] In some optional implementations of this embodiment, the number of first nozzles is one, the number of second nozzles is two, and the first nozzle is disposed between the two second nozzles.

[0145] In some optional implementations of this embodiment, the ratio of the actual ink droplet volume printed by the second printhead to the actual ink droplet volume printed by the first printhead is 2 to 13; and / or,

[0146] The ratio of the rated droplet volume printed by the first printhead to the actual droplet volume printed by the first printhead is 0.7 to 1.3; and / or,

[0147] The ratio of the rated droplet volume printed by the second printhead to the actual droplet volume printed by the second printhead is 0.7 to 1.3; and / or,

[0148] The second solvent may be the same as or different from the first solvent.

[0149] In some optional implementations of this embodiment, the inkjet printing device 400 further includes a drying module. Wherein:

[0150] A drying module is used to dry the mixed ink to form a thin film.

[0151] To address the aforementioned technical problems, embodiments of this application also provide an inkjet printing device. Please refer to [link / reference needed] for details. Figure 4 , Figure 4 This is a basic structural block diagram of the inkjet printing device in this embodiment.

[0152] The inkjet printing device includes a control mechanism, which comprises a memory 41, a processor 42, and a network interface 43 that are interconnected via a system bus. Those skilled in the art will understand that this inkjet printing device is a device capable of automatically performing numerical calculations and / or information processing according to pre-set or stored instructions. Its hardware includes, but is not limited to, microprocessors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), embedded devices, etc.

[0153] The inkjet printing device can be a desktop computer, laptop, handheld computer, or cloud server, etc. The inkjet printing device can interact with the user via a keyboard, mouse, remote control, touchpad, or voice control.

[0154] The memory 41 includes at least one type of readable storage medium, including flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 41 may be an internal storage unit of the inkjet printer, such as the hard disk or memory of the inkjet printer. In other embodiments, the memory 41 may also be an external storage device of the inkjet printer, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the inkjet printer. Of course, the memory 41 may include both the internal storage unit and the external storage device of the inkjet printer. In this embodiment, the memory 41 is typically used to store the operating system and various application software installed on the inkjet printer, such as the program code of the inkjet printing method. In addition, the memory 41 can also be used to temporarily store various types of data that have been output or will be output.

[0155] In some embodiments, the processor 42 may be a central processing unit (CPU), controller, microcontroller, microprocessor, or other data processing chip. The processor 42 is typically used to control the overall operation of the inkjet printing device. In this embodiment, the processor 42 is used to run program code stored in the memory 41 or process data, for example, to run program code for the inkjet printing method.

[0156] The network interface 43 may include a wireless network interface or a wired network interface, which is typically used to establish a communication connection between the inkjet printer and other electronic devices.

[0157] See Figure 5 The inkjet printing device further includes a printing mechanism, which includes at least one first printhead 44 and at least one second printhead 45, wherein the first printhead 44 and the second printhead 45 are both electrically connected to the processor, and the actual ink droplet volume printed by the first printhead 44 is smaller than the actual ink droplet volume printed by the second printhead 45.

[0158] This embodiment has the following beneficial effects: (1) The first printhead 44 and the second printhead 45 are controlled to print at the same time to avoid the initial ink concentration being too high, which would cause the pixel pit 46 to dry too quickly and be unfavorable to the mixing of the initial ink and the first solvent; the first solvent and the initial ink after printing are mixed and diffused in the pixel pit 46, so that the initial ink in the mixed ink formed by the two is evenly distributed in the pixel pit 46, so that the evaporation rate of each position on the pixel pit 46 tends to be consistent during the drying process, thereby improving the consistency of the film thickness. (2) Since the first solvent has a smaller impact on the thickness of the film formed after film formation compared to the initial ink, the first printhead 44 can be selected with an actual ink droplet volume smaller than that of the second printhead 45. This allows for precise control of the initial ink printing volume of the first printhead 44, while also relaxing the selection restrictions of the second printhead 45, reducing the screening process and difficulty of the second printhead 45. Furthermore, compared to existing printheads with the same actual ink droplet volume, the first printhead 44 and the second printhead 45 with different actual ink droplet volumes in this application can be flexibly combined to achieve flexible control of inkjet printing. This also solves the problem of long printing time caused by excessive number of printing droplets in the prior art, thus improving printing efficiency.

[0159] In some optional implementations of this embodiment, see [link to relevant documentation]. Figure 5 The second nozzle 45 is disposed on one side of the first nozzle 44;

[0160] The first printhead 44 is used to print on the first printing area AA of the pixel pit 46, and the second printhead 45 is used to print on the second printing area BB of the pixel pit 46, the second printing area BB being located at the edge of the first printing area AA.

[0161] Since the first solvent has a smaller impact on the film thickness after film formation compared to the initial ink, the first solvent is printed on the second printing area BB by the second nozzle 45, and the initial ink is printed on the first printing area AA within the second printing area BB by the first nozzle 44, whose actual ink droplet volume is smaller than that of the second nozzle 45. This allows the initial ink on the first printing area AA to diffuse in all directions, ensuring the flow rate of the initial ink to the second printing area BB, thereby ensuring the uniformity of the initial ink diffusion and thus ensuring the film quality.

[0162] In some embodiments, the edge region of the first printing area AA is adjacent to or overlaps with the edge region of the second printing area BB. The overlapping arrangement is relative to the adjacent first printing area AA and the second printing area BB. During the printing process, the second nozzle 45 can cover the overlapping area on the first printing area AA, and the first nozzle 44 can cover the overlapping area on the second printing area BB, thereby improving the diffusion efficiency of the initial ink in the pixel pit 46, and thus improving the fusion efficiency of the initial ink and the first solvent.

[0163] In some embodiments, in inkjet printing of a substrate with multiple pixel pits 46, more first solvent can be printed on the pixel pits 46 at the edge of the substrate. During the drying and film formation process, the difference in evaporation rate of the mixed ink on the pixel pits 46 at the edge and the middle of the substrate is reduced, so that the atmosphere concentration in the middle and the edge of the substrate tends to be consistent, thereby making the evaporation rate of the first solvent and the second solvent on the entire substrate approximately consistent, thereby ensuring that the film thickness of the formed film is uniform.

[0164] In some optional implementations of this embodiment, see [link to relevant documentation]. Figure 5 There is one first nozzle 44 and two second nozzles 45, with the first nozzle 44 positioned between the two second nozzles 45.

[0165] In this embodiment, the first nozzle 44 prints initial ink on the first printing area AA of the pixel pit 46, and the two second nozzles 45 print first solvent on the second printing areas BB on both sides of the first printing area AA. In this way, when the initial ink diffuses from the first printing area AA to the second printing area BB, the initial ink can be fused with the first solvent on both sides, thereby improving the fusion efficiency of the initial ink and the first solvent, and ensuring the uniformity of fusion of the initial ink and the first solvent in all directions within the pixel pit 46, thereby ensuring the film quality.

[0166] This application also provides another embodiment, namely, a computer-readable storage medium storing an inkjet printing program that can be executed by at least one processor to cause the at least one processor to perform the steps of the inkjet printing method as described above.

[0167] This embodiment has the following beneficial effects: (1) The first printhead and the second printhead are controlled to print at the same time to avoid the initial ink concentration being too high, which would cause the pixel pit to dry too quickly and be unfavorable to the mixing of the initial ink and the first solvent; the first solvent and the initial ink after printing are mixed and diffused in the pixel pit, so that the initial ink in the mixed ink formed by the two is evenly distributed in the pixel pit, so that the evaporation rate of each position on the pixel pit tends to be consistent during the drying process, thereby improving the consistency of the film thickness. (2) Since the first solvent has a smaller impact on the thickness of the film formed after film formation compared to the initial ink, the first printhead can be selected with an actual ink droplet volume smaller than that of the second printhead. This allows for precise control of the initial ink printing volume of the first printhead, while also relaxing the selection restrictions of the second printhead, reducing the screening process and difficulty of the second printhead. Furthermore, compared to existing printheads with the same actual ink droplet volume, the first and second printheads with different actual ink droplet volumes in this application can be flexibly combined to achieve flexible control of inkjet printing. This also solves the problem of long printing time caused by excessive number of printing droplets in the prior art, thus improving printing efficiency.

[0168] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0169] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. An inkjet printing method, characterized in that, Includes the following steps: Obtain the total print volume corresponding to the pixel pit, and the rated droplet volume corresponding to the first and second printheads respectively; Obtain the pixel type corresponding to the pixel pit; The initial ink printing volume corresponding to the first printhead is determined based on the total printing volume and the pixel type. Based on the initial ink printing volume and the rated ink droplet volume of the first printhead, the number of printing drops of the first printhead is determined, the rated ink droplet volume of the first printhead is adjusted according to the number of printing drops of the first printhead, and the adjusted rated ink droplet volume is determined as the actual ink droplet volume of the first printhead. Based on the total printing volume and the initial ink printing volume, the first solvent printing volume corresponding to the second printhead is determined. Based on the first solvent printing volume and the rated ink droplet volume of the second printhead, the number of printing drops of the second printhead is determined. Based on the number of printing drops of the second printhead, the rated ink droplet volume of the second printhead is adjusted, and the adjusted rated ink droplet volume is determined as the actual ink droplet volume of the second printhead. The printing drop count and the actual ink drop volume corresponding to the first printhead and the second printhead are combined to form printing parameters; The system responds to the received inkjet printing command to obtain the printing parameters, and controls the first printhead to print initial ink in the pixel pits of the substrate and the second printhead to print the first solvent in the pixel pits according to the printing parameters, so as to form a mixed ink. Wherein, the actual ink droplet volume printed by the first printhead is smaller than the actual ink droplet volume printed by the second printhead, and the initial ink includes a solute and a second solvent.

2. The inkjet printing method according to claim 1, characterized in that, The step of adjusting the rated ink droplet volume of the first printhead according to the number of print drops and determining the adjusted rated ink droplet volume as the actual ink droplet volume of the first printhead includes: if the number of print drops of the first printhead is not an integer, obtaining a first voltage waveform corresponding to the first printhead, adjusting the rated ink droplet volume of the first printhead according to the first voltage waveform to obtain the actual ink droplet volume of the first printhead; and / or, The step of adjusting the rated ink drop volume of the second printhead according to the number of print drops and determining the adjusted rated ink drop volume as the actual ink drop volume of the second printhead includes: if the number of print drops of the second printhead is not an integer, obtaining the second voltage waveform corresponding to the second printhead, adjusting the rated ink drop volume of the second printhead according to the second voltage waveform, and obtaining the actual ink drop volume of the second printhead.

3. The inkjet printing method according to any one of claims 1 or 2, characterized in that, The steps of controlling the first printhead to print initial ink in the pixel pits of the substrate and the second printhead to print the first solvent in the pixel pits include: The first printhead is controlled to print the initial ink on the first printing area of ​​the pixel pit, and the second printhead is controlled to print the first solvent on the second printing area of ​​the pixel pit; The second printing area is located at the edge of the first printing area.

4. The inkjet printing method according to claim 3, characterized in that, The number of first nozzles is one, and the number of second nozzles is two, with the first nozzle positioned between the two second nozzles.

5. The inkjet printing method according to any one of claims 1 or 2, characterized in that, The ratio of the actual ink droplet volume printed by the second printhead to the actual ink droplet volume printed by the first printhead is 2 to 13; and / or, The ratio of the rated droplet volume printed by the first printhead to the actual droplet volume printed by the first printhead is 0.7 to 1.3; and / or, The ratio of the rated droplet volume printed by the second printhead to the actual droplet volume printed by the second printhead is 0.7 to 1.3; and / or, The second solvent may be the same as or different from the first solvent.

6. An inkjet printing apparatus for performing the inkjet printing method according to any one of claims 1 to 5, characterized in that, include: An inkjet printing module is used to respond to a received inkjet printing command and control a first printhead to print initial ink in a pixel pit on a substrate and a second printhead to print a first solvent in the pixel pit to form a mixed ink; wherein the actual ink droplet volume printed by the first printhead is smaller than the actual ink droplet volume printed by the second printhead, and the initial ink includes a solute and a second solvent.

7. An inkjet printing device, characterized in that, include: A control mechanism includes a memory and a processor, the memory being used to store readable instructions, and the processor being used to implement the steps of the inkjet printing method as described in any one of claims 1 to 5 when executing the readable instructions; as well as The printing mechanism includes at least one first printhead and at least one second printhead, both of which are electrically connected to the processor. The actual ink droplet volume printed by the first printhead is smaller than the actual ink droplet volume printed by the second printhead.

8. The inkjet printing apparatus according to claim 7, characterized in that, The second nozzle is located on one side of the first nozzle; The first printhead is used to print on a first printing area of ​​the pixel pit, and the second printhead is used to print on a second printing area of ​​the pixel pit, the second printing area being located at the edge of the first printing area.

9. The inkjet printing apparatus according to claim 8, characterized in that, The number of first nozzles is one, and the number of second nozzles is two, with the first nozzle positioned between the two second nozzles.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-readable instructions, which, when executed by a processor, implement the steps of the inkjet printing method as described in any one of claims 1 to 5.

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