阅读说明：本技术 喷墨打印头、喷墨打印设备、方法以及装置 (Inkjet print head, inkjet printing apparatus, method and device ) 是由 黄辉 于 2021-09-10 设计创作，主要内容包括：本申请提供一种喷墨打印头、喷墨打印设备、喷墨打印方法以及喷墨打印装置。喷墨打印头包括第一喷嘴列和第二喷嘴列。所述第一喷嘴列包括沿第一方向间隔排列的多个第一喷嘴,所述第一喷嘴被配置为打印第一体积范围的墨水。所述第二喷嘴列与所述第一喷嘴列在第二方向上间隔排列,所述第二喷嘴列包括沿所述第一方向间隔排列的多个第二喷嘴,所述第二喷嘴被配置为打印第二体积范围的墨水,所述第二体积范围与所述第一体积范围不同,每一所述第二喷嘴对应于相邻两个第一喷嘴的间隔设置。本申请的喷墨打印头能够打印更广体积范围的墨水,从而适应更广泛的打印需求,提高像素的设计灵活度。(The application provides an inkjet printing head, an inkjet printing apparatus, an inkjet printing method, and an inkjet printing apparatus. The inkjet printhead includes a first nozzle column and a second nozzle column. The first nozzle column includes a plurality of first nozzles arranged at intervals in a first direction, the first nozzles being configured to print a first volume range of ink. The second nozzle array is arranged at intervals in a second direction with the first nozzle array, the second nozzle array comprises a plurality of second nozzles arranged at intervals along the first direction, the second nozzles are configured to print ink in a second volume range, the second volume range is different from the first volume range, and each second nozzle is arranged corresponding to the interval of two adjacent first nozzles. The application discloses inkjet printer head can print the ink of wider volume range to adapt to more extensive printing demand, improve the design flexibility ratio of pixel.)

1. An inkjet printhead, comprising:

a first nozzle column including a plurality of first nozzles arranged at intervals in a first direction, the first nozzles being configured to print a first volume range of ink; and

a second nozzle array spaced apart from the first nozzle array in a second direction, the second nozzle array including a plurality of second nozzles spaced apart in the first direction, the second nozzles being configured to print a second volume range of ink, the second volume range being different from the first volume range, each of the second nozzles being disposed corresponding to a spacing of two adjacent first nozzles.

2. The inkjet printhead of claim 1, wherein said first direction is perpendicular to said second direction, adjacent two nozzles are spaced apart in said first direction by a first pitch, and said first pitch is the same for each two adjacent nozzles; and the distance between two adjacent nozzles and the second direction is a second distance, and the second distance between every two adjacent nozzles is the same.

3. The inkjet printhead of claim 2, wherein adjacent two of said nozzles are 2 microns to 10 microns at said first pitch, and adjacent two of said nozzles are 2 microns to 10 microns at said second pitch.

4. The inkjet printhead of claim 1, further comprising a third nozzle row, the second nozzle row and the first nozzle row being spaced apart in the second direction, the third nozzle row including a plurality of third nozzles spaced apart along the first direction, the third nozzles being configured to print a third volume range of ink, a maximum value of the third volume range being less than a maximum value of the first volume range and greater than a maximum value of the second volume range, a minimum value of the third volume range being less than a minimum value of the first volume range and greater than a minimum value of the second volume range, each of the third nozzles being disposed corresponding to a spacing of two adjacent first nozzles and a spacing of two adjacent second nozzles.

5. The inkjet printhead of claim 1, wherein a maximum value of the first volume range is greater than a maximum value of the second volume range, a minimum value of the first volume range is greater than a minimum value of the second volume range, and a maximum value of the second volume range is greater than or equal to the minimum value of the first volume range.

6. The inkjet printhead of claim 1, wherein a maximum value of said first volume range is greater than a maximum value of said second volume range, a minimum value of said first volume range is greater than a minimum value of said second volume range, said first nozzle row further includes at least one of said second nozzles, and at least one of said second nozzles is spaced apart from a plurality of said first nozzles in said first direction.

7. An inkjet printing apparatus comprising an inkjet printhead according to any one of claims 1 to 6.

8. An inkjet printing method for printing using the inkjet printhead according to any one of claims 1 to 6, the inkjet printing method comprising:

inputting first preset parameters of a target substrate to be printed, wherein the first preset parameters comprise the area, the coordinates, the ink volume and the printing starting point of a printing target on the target substrate;

providing second preset parameters, wherein the second preset parameters comprise the area, the coordinate and the printing volume range of the nozzle of the ink-jet printing head, and generating a printing scheme for printing the target substrate according to the first preset parameters and the second preset parameters, wherein the printing scheme comprises the coordinate of the nozzle, the printing volume and the printing times of the nozzle used in printing;

and providing a substrate, and printing on the substrate according to the printing scheme to obtain a target substrate.

9. The inkjet printing method of claim 8, wherein said generating a print scheme for printing the target substrate based on the first and second preset parameters comprises:

matching the coordinates of the printing target with the coordinates of the nozzles, selecting the nozzles matched with the coordinates of the printing target, enumerating all combinations in which the sum of the products of the printing volumes of the nozzles and the number of times of printing is equal to the ink volume of the printing target to be printed, and selecting the combination with the least number of times of printing as the printing scheme.

10. An inkjet printing apparatus, comprising:

the printing system comprises an input module, a printing module and a printing module, wherein the input module is used for inputting a first preset parameter and a second preset parameter of a target substrate to be printed, and the first preset parameter comprises the area, the coordinate, the ink volume and a printing starting point of a printing target on the target substrate; the second preset parameters comprise the area, the coordinate and the printing volume range of the nozzle of the ink-jet printing head;

the storage module is used for storing the first preset parameter and the second preset parameter;

and the calculation module is used for generating a printing scheme for printing the target substrate according to the first preset parameter and the second preset parameter, wherein the printing scheme comprises the coordinates of the nozzles used in printing, the printing volume of the nozzles and the printing times.

Technical Field

The present disclosure relates to inkjet printing technologies, and particularly, to an inkjet printhead, an inkjet printing apparatus, an inkjet printing method, and an inkjet printing apparatus.

Background

The ink jet printing technology is widely used in the manufacture of organic light-Emitting Diode (OLED) display devices. Current inkjet printing devices mainly include an inkjet printhead that includes a plurality of inkjet printing nozzles. Only one type of ink jet printing nozzle is typically included in the same ink jet print head. The ink jet printing nozzles in the same ink jet print head are only capable of printing ink in a single volume range. Ink jet print heads of this design can only meet a range of ink ejection requirements. Therefore, when designing a pixel, the actual single drop ejection volume of the head needs to be considered, and the pixel design is limited. Therefore, in order to achieve the purpose of satisfying the impact of ink jet to different pixel sizes, the improvement of the ink jet head is necessary.

Disclosure of Invention

In view of the above, the present application is directed to an inkjet printhead having a wider printing volume range.

The present application provides an inkjet printhead, comprising:

a first nozzle column including a plurality of first nozzles arranged at intervals in a first direction, the first nozzles being configured to print a first volume range of ink; and

a second nozzle array spaced apart from the first nozzle array in a second direction, the second nozzle array including a plurality of second nozzles spaced apart in the first direction, the second nozzles being configured to print a second volume range of ink, the second volume range being different from the first volume range, each of the second nozzles being disposed corresponding to a spacing of two adjacent first nozzles.

In one embodiment, the first direction is perpendicular to the second direction, the distance between two adjacent nozzles in the first direction is a first distance, and the first distances between every two adjacent nozzles are the same; and the distance between two adjacent nozzles and the second direction is a second distance, and the second distance between every two adjacent nozzles is the same.

In one embodiment, two adjacent nozzles are 2 to 10 microns at the first pitch and two adjacent nozzles are 2 to 10 microns at the second pitch.

In one embodiment, the inkjet printhead further includes a third nozzle row, the second nozzle row and the first nozzle row are arranged at intervals in the second direction, the third nozzle row includes a plurality of third nozzles arranged at intervals in the first direction, the third nozzles are configured to print ink of a third volume range, a maximum value of the third volume range is smaller than a maximum value of the first volume range and larger than a maximum value of the second volume range, a minimum value of the third volume range is smaller than a minimum value of the first volume range and larger than a minimum value of the second volume range, and each of the third nozzles is arranged corresponding to an interval between two adjacent first nozzles and an interval between two adjacent second nozzles.

In one embodiment, a maximum value of the first volume range is greater than a maximum value of the second volume range, a minimum value of the first volume range is greater than a minimum value of the second volume range, and a maximum value of the second volume range is greater than or equal to the minimum value of the first volume range.

In one embodiment, a maximum value of the first volume range is greater than a maximum value of the second volume range, a minimum value of the first volume range is greater than a minimum value of the second volume range, and the first nozzle row further includes at least one second nozzle, and the at least one second nozzle is spaced apart from the plurality of first nozzles in the first direction.

The present application provides an inkjet printing apparatus comprising an inkjet printhead as described in any one of the above.

The present application provides an inkjet printing method of printing using an inkjet printhead as described in any one of the above, the inkjet printing method comprising:

inputting first preset parameters of a target substrate to be printed, wherein the first preset parameters comprise the area, the coordinates, the ink volume and the printing starting point of a printing target on the target substrate;

providing second preset parameters, wherein the second preset parameters comprise the area, the coordinate and the printing volume range of the nozzle of the ink-jet printing head, and generating a printing scheme for printing the target substrate according to the first preset parameters and the second preset parameters, wherein the printing scheme comprises the coordinate of the nozzle, the printing volume and the printing times of the nozzle used in printing;

and providing a substrate, and printing on the substrate according to the printing scheme to obtain a target substrate.

In one embodiment, the generating a printing scheme for printing the target substrate according to the first preset parameter and the second preset parameter includes:

matching the coordinates of the printing target with the coordinates of the nozzles, selecting the nozzles matched with the coordinates of the printing target, enumerating all combinations of which the sum of the products of the printing volumes of the nozzles and the printing times is equal to the ink volume of the printing target to be printed, and selecting the combination with the least printing times as a printing scheme.

The present application also provides an inkjet printing apparatus, comprising:

the printing system comprises an input module, a printing module and a printing module, wherein the input module is used for inputting a first preset parameter and a second preset parameter of a target substrate to be printed, and the first preset parameter comprises the area, the coordinate, the ink volume and a printing starting point of a printing target on the target substrate; the second preset parameters comprise the area, the coordinate and the printing volume range of the nozzle of the ink-jet printing head;

the storage module is used for storing the first preset parameter and the second preset parameter;

and the calculation module is used for generating a printing scheme for printing the target substrate according to the first preset parameter and the second preset parameter, wherein the printing scheme comprises the coordinates of the nozzles used in printing, the printing volume of the nozzles and the printing times.

The application discloses inkjet printer head is including the nozzle row that can print the ink of different volume ranges, when carrying out inkjet printing, the volume that can print as required selects the arbitrary combination of first nozzle and second nozzle to print, can print the ink of wider volume range to adapt to more extensive printing demand, improve the design flexibility ratio of pixel.

Drawings

In order to more clearly illustrate the technical solutions in the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a first embodiment of an inkjet printhead according to the present application.

Fig. 2 is a schematic diagram of the inkjet printhead of fig. 1 for printing a pixel.

Fig. 3 is a schematic view of the inkjet printhead of fig. 1 configured to print another pixel.

Fig. 4 is a schematic structural view of a second embodiment of an inkjet printhead according to the present application.

Fig. 5 is a schematic structural view of an inkjet printing apparatus of the present application.

Fig. 6 is a flowchart of an inkjet printing method of the present application.

Fig. 7 is a schematic block diagram of an inkjet printing apparatus according to the present application.

Detailed Description

The technical solution in the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application, are within the scope of protection of the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features directly, or may comprise the first and second features not being directly connected but being in contact with each other by means of further features between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The application provides an inkjet printer head can the inkjet printing in various fields. For example, it can be used for inkjet printing of OLED devices. In particular, it can be used for inkjet printing of a hole injection layer, a hole transport layer, an organic light emitting layer, an electron injection layer, an electron transport layer, and the like of an OLED. It is to be understood that the inkjet print head of the present application can also be used for inkjet printing for other purposes, for example, inkjet printing of a color film layer, 3D printing, paper product printing, and the like. The application is not limited to the use of ink jet print heads.

Referring to fig. 1, an inkjet printhead 100 includes a first nozzle row 10, a second nozzle row 20, and a third nozzle row 30. The first nozzle row 10 includes a plurality of first nozzles 11 arranged at intervals in the first direction D1. The first nozzles 11 are configured to print a first volume range V₁The ink of (4). The second nozzle row 20 includes a plurality of second nozzles 21 arranged at intervals in the first direction D1. The second nozzle 21 is configured to print a second volume range V₂The ink of (4). The third nozzle row 30 includes a plurality of third nozzles 31 arranged at intervals in the first direction D1. The third nozzles 31 are configured to print a third volume range V₃The ink of (4). Third volume range V₃Second volume range V₂And a first volume range V₁Are different from each other. The first volume range V₁Second volume range V₂And a third volume range V₃Are single drop print volumes of single drop nozzles.

The first nozzle row 10, the second nozzle row 20, and the third nozzle row 30 are arranged at intervals in the second direction D2. The second direction D2 intersects the first direction D1, and optionally, the second direction D2 is perpendicular to the first direction D1.

The application discloses inkjet printer head is including the nozzle row that can print the ink of different volume ranges, when carrying out inkjet printing, the volume that can print as required selects the arbitrary combination of first nozzle 11, second nozzle 21 and third nozzle 31 to print, can print the ink of wider volume range to adapt to more extensive printing demand, improve the design flexibility ratio of pixel.

Alternatively, the inkjet printhead 100 of the present application may include only the first nozzle array 10 and the second nozzle array 20, the first nozzle array 10 being configured to print the first volume range V₁The second nozzle row 20 is configured to print a second volume range V₂Of the second volume range V₂And a first volume range V₁Different. Alternatively, the inkjet printhead 100 of the present application may further include more nozzle columns, and each nozzle column may print different volume ranges.

The first nozzle row 10, the second nozzle row 20, and the third nozzle row 30 are arranged to be shifted from each other. Specifically, each of the second nozzles 21 is disposed corresponding to an interval between two adjacent first nozzles 11. Each of the third nozzles 31 is disposed corresponding to the interval between two adjacent first nozzles 11 and the interval between two adjacent second nozzles 21. Due to process limitations, the minimum spacing between two adjacent nozzles is constant when the showerhead is fabricated. It should be noted that the distance between two adjacent nozzles is the distance between two nozzle walls on the line connecting the centers of the two nozzles. For example, the distance between the first nozzle 11 and the second nozzle 21 located at the lower left of the showerhead 100 in fig. 1 is the distance P between the nozzle wall of the first nozzle 11 and the nozzle wall of the second nozzle 21 on the line connecting the center O1 of the first nozzle 11 and the center O2 of the second nozzle 21. Specifically, the distance P between two adjacent nozzles may be decomposed into a first pitch P1 in the first direction D1 and a second pitch P2 in the second direction D2 perpendicular to the first direction D1. When the minimum distance between two adjacent nozzles is fixed, for example, a preset distance. If the nozzles in adjacent columns are aligned, the second pitch P2 between adjacent two nozzles is equal to the predetermined distance. When the nozzles in adjacent rows are staggered, the spacing between two nozzles is equal to the predetermined distance, and the second spacing P2 between two nozzles is less than the predetermined distance. By arranging the nozzles in the adjacent rows in a staggered manner, the second pitch P2 between two adjacent nozzles in the adjacent rows is shortened, so that more nozzles can be arranged in the head having the same area, the density of the nozzles is increased, and the manufacturing cost of the head can be reduced. In addition, the density of the nozzles in the spray head is increased, more nozzle combination modes can be provided, and the flexibility of pixel design is further improved.

Optionally, the first pitch P1 of each two adjacent nozzles is the same; the second pitch P2 is the same for every two adjacent nozzles. Assuming that the head is divided into two adjacent portions, and the first pitch P1 between two adjacent nozzles in the first portion is 3 micrometers and the first pitch P1 between two adjacent nozzles in the second portion is 5 micrometers, when the nozzles in the first portion can be used for pixel printing, the nozzles in the second portion may be misaligned with the pixels because the pitch is too large to be used for pixel printing. This application establishes to the same through the first interval with two adjacent nozzles, and the second interval also establishes to the same, can improve the utilization ratio of the nozzle on the shower nozzle, promotes printing speed. On the other hand, because the pixels on the display panel are uniformly arranged, the corresponding nozzles are also uniformly arranged, and the printing requirements of the pixels are better adapted.

It is understood that in some embodiments, the first pitch P1 and the second pitch P2 of each two adjacent nozzles may not be the same.

Optionally, the first pitch P1 of two adjacent nozzles is 2 microns to 10 microns, such as 2 microns, 3 microns, 4 microns, 5 microns, 6 microns, 7 microns, 8 microns, 9 microns, or 10 microns. Preferably, the first pitch P1 of two adjacent nozzles is 4 to 6 microns. The second pitch P2 of two adjacent nozzles is 2 to 10 microns, for example 2, 3, 4, 5, 6, 7, 8, 9 or 10 microns. Preferably, the second pitch P2 of two adjacent nozzles is 4 to 6 microns. If the interval between the adjacent two nozzles is too small, ink droplets remaining between the adjacent two nozzles easily merge with each other, resulting in nozzle clogging. If the distance between two adjacent nozzles is too small, the density of the nozzles in the nozzle is too small, and a small printing area cannot be easily covered. By setting the first pitch P1 and the second pitch P2 of the adjacent two nozzles to 2 micrometers to 10 micrometers, the ink droplets can be prevented from merging between the adjacent nozzles, causing nozzle clogging, and a sufficient nozzle density can be ensured.

First volume range V₁Is a V_1min～V_1maxSecond volume range V₂Is a V_2min～V_2maxThird volume range V₃Is a V_3min～V_3max. Third volume range V₃Maximum value of (V)_3maxLess than a first volume range V₁Maximum value of (V)_1maxAnd is larger than the second volume range V₂Maximum value of (V)_2max(ii) a Third volume range V₃Minimum value of (V)_3minLess than a first volume range V₁Minimum value of (V)_1minAnd is larger than the second volume range V₂Minimum value of (V)_2min. In a specific embodiment, the first nozzle 11, the second nozzle 21, and the third nozzle 31 are each selected from nozzles having different specifications. More specifically, as shown in fig. 1, fig. 1 shows a top view of the first nozzle 11, the second nozzle 21 and the third nozzle 31, and circles and ellipses in fig. 1 represent the orifices of the first nozzle 11, the second nozzle 21 and the third nozzle 31, respectively. The area of the nozzle hole 11a of the first nozzle 11 is larger than the area of the nozzle hole 31a of the third nozzle 31, and the area of the nozzle hole 31a of the third nozzle 31 is larger than the area of the nozzle hole 21a of the second nozzle 21. The areas of the orifices of the first nozzle 11, the second nozzle 21, and the third nozzle 31 are different from each other, and thus, ink of different volume ranges can be printed. However, the configurations of the first nozzle 11, the second nozzle 21, and the third nozzle 31 in the present application are not limited thereto as long as the first nozzle 11, the second nozzle 21, and the third nozzle 31 can print ink in different volume ranges.

Optionally, a first volume range V₁Second volume range V₂And a third volume range V₃And the two parts can be overlapped. For example, the first volume range V₁Minimum value of (V)_1minMay be less than or equal to the third volume range V₃Maximum value of (V)_3maxThird volume range V₃Minimum value of (V)_3minMay be less than or equal to the second volume range V₂Maximum value of (V)_2max. For example, the second volume range V₂Is 1PL (picoliter) to 3PL, and a third volume range V₃Is 3PL to 5PL, first bodyProduct range V₁Is 5PL to 8 PL; or a second volume range V₂Is 1PL to 3PL, and a third volume range V₃Is 5PL to 8PL, and a first volume range V₁Is 8PL to 10 PL.

By making the first volume range V₁Second volume range V₂And a third volume range V₃Overlapping two by two, can provide more nozzle printing combinations. For example, in the second volume range V₂Is 1PL to 3PL, and a third volume range V₃Is 3PL to 5PL, and a first volume range V₁In the nozzles 100 of 5PL to 8PL, when the volume to be printed is 5PL, the volumes of the second nozzles 21 and the third nozzles 31 can be used for printing. When the positions of the second nozzle 21 and the third nozzle 31 both match the position of the printing target, both the second nozzle 21 and the third nozzle 31 can be used for printing; when the second nozzle 21 cannot be matched with the position of the printing object and the third nozzle 31 is matched with the position of the printing object, the third nozzle 31 can be used for printing, and vice versa. According to the combination, the single-drop volume combination range of the spray head can cover the range of 1PL to 15PL, and the required volume of products in the field of panels at present can be covered. Since smaller volumes correspond to smaller pixels, the smaller pixels and the higher resolution, the nozzle combination of the present application can accommodate the high resolution panel requirements.

Next, a case where the inkjet printhead 100 according to the first embodiment of the present application is used for different pixel printing will be described with reference to fig. 2 and 3.

In the case of performing ink jet printing, it is necessary to align the ink jet print head 100 with a substrate on which printing is to be performed, and to form a film at a predetermined position of a pixel on the substrate by ink droplets discharged from nozzles of the ink jet print head 100. Before printing, the nozzles used for printing pixels are selected in advance through data input into the ink jet printing device, and the printing times of the nozzles are calculated.

Specifically, referring to fig. 2, the left side is a top view of the pixel PX design to be printed, and the right side is a bottom view of the inkjet printhead 100. Since printing is performed in a column, when selecting a nozzle, a nozzle that matches the position of the first pixel PX of each line may be selected according to the position. For the first row of pixels PX, two nozzles located in the first area a1 are located directly opposite the first row of pixels PX, and the other nozzles are located offset from the first row of pixels PX. Therefore, two nozzles located in the first area a1 can be used to print a first line of pixels, and the number of times of printing of the two nozzles is determined according to the volume of ink required to print the first line of pixels PX. For the second row of pixels PX, one nozzle located in the second area a2 is located directly opposite the second row of pixels PX and can be used to print the second row of pixels PX, the number of prints of the two nozzles is determined according to the volume of ink required to print the second row of pixels PX, and so on.

Referring to fig. 3, the pixel size in fig. 3 is smaller than the pixel size in fig. 2. Similarly, for the first row of pixels PX, two nozzles located in the third area a3 are located directly opposite the first row of pixels PX and can be used to print the first row of pixels PX, and the number of times of printing of the two nozzles is determined according to the volume of ink required to print the first row of pixels PX. For the second row of pixels PX, two nozzles located in the fourth area a3 are located directly opposite the second row of pixels PX and can be used to print the second row of pixels PX, the number of times the two nozzles print is determined according to the volume of ink required to print the second row of pixels PX, and so on.

Referring to fig. 4, the difference between the inkjet printhead 100 of the second embodiment of the present application and the first embodiment is:

the first nozzle row 10 further includes at least one second nozzle 21, and the at least one second nozzle 21 is spaced apart from the plurality of first nozzles 11 in the first direction D1. The third nozzle row 30 further includes at least one second nozzle 21, and the at least one second nozzle 21 and the plurality of third nozzles 31 are arranged at intervals along the first direction D1.

The larger the number of nozzles, the larger the volume of the head, the higher the manufacturing cost, and the more ink is used for printing. According to the present embodiment, the first nozzle row 10 has the first nozzles 11 and the second nozzles 21 arranged in a mixed manner in one row, and the area of the nozzle holes 21a of the second nozzles 21 is smaller than the area of the nozzle holes 11a of the first nozzles 11. Compared to the first embodiment, in the present embodiment, the first nozzles 11 having a large nozzle hole area and the second nozzles 21 having a small nozzle hole area are arranged in the same nozzle row, so that more nozzles can be provided in the head having the same nozzle hole area, thereby reducing the manufacturing cost and the printing cost. Similarly, in the third nozzle row 30, the third nozzles 31 and the second nozzles 21 are arranged in a mixed manner, and more nozzles can be provided in the head having the same area.

Referring to fig. 5, the present application further provides an inkjet printing apparatus 1. The inkjet printing apparatus includes an inkjet printhead 100, a base 200, a moving mechanism 300, an image pickup mechanism 400, and the like. The base 200 is used for carrying a substrate to be printed, and the inkjet printhead 100 is located above the base 200 and connected to the moving mechanism 300. The moving mechanism 300 is provided at one side of the base 200, and moves the inkjet printhead 100 above the base 200. The image capture mechanism 400 captures images of the substrate for monitoring printing.

The inkjet printing apparatus 1 of the present application is configured with the inkjet printhead 100 as described above, and can accommodate a wide range of printing requirements.

Referring to fig. 6, the present application further provides an inkjet printing method, which uses the inkjet printhead 100 provided in the present application to print.

The inkjet printing method includes:

step 101: inputting a first preset parameter of a target substrate to be printed, wherein the first preset parameter comprises the area, the coordinate, the ink volume and the starting point of printing of a printing target on the target substrate.

In step 101, the target substrate to be printed may be a display substrate including an OLED display device, or a color filter substrate including a color filter. The printing target on the target substrate may be a pixel in the OLED display panel, including an organic film layer or a color film in the pixel.

Step 102: providing second preset parameters, wherein the second preset parameters comprise the area, the coordinate and the printing volume range of the nozzle of the ink jet printing head, and generating a printing scheme for printing the target substrate according to the first preset parameters and the second preset parameters, and the printing scheme comprises the coordinate of the nozzle, the printing volume and the printing times of the nozzle used in printing.

In step 102, generating a printing scheme for printing the target substrate according to the first preset parameter and the second preset parameter specifically includes:

matching the coordinates of the printing target with the coordinates of the nozzles, selecting the nozzles matched with the coordinates of the printing target, enumerating that the sum of the products of the printing volumes of the nozzles and the number of times of printing is equal to all combinations of the ink volumes of the printing target to be printed, and selecting the combination with the smallest number of times of printing as a printing scheme. The number of prints can be reduced and increased by selecting the combination with the smallest number of prints. The nozzles that match the coordinates of the print target are nozzles that can be aligned with the print target when the inkjet print head 100 is positioned directly above the substrate to be printed when the print start point is determined.

For example, when the second volume range V₂Is 1PL to 3PL, and a third volume range V₃Is 3PL to 5PL, and a first volume range V₁From 5PL to 8PL, when the ink volume of the printing target is 3PL, the second nozzle 31 or the second nozzle 21 may be selected to print 3PL once, while the second nozzle 21 is not selected to print 1PL three times.

Alternatively, when two or more nozzles must be used in all combinations in which the sum of the products of the print volumes and the number of times of printing of the listed nozzles is equal to the ink volume of the print target to be printed, a combination in which the number of times of printing of each of the nozzles used is the same is selected as the printing scheme. When the second volume range V₂Is 1PL to 3PL, and a third volume range V₃Is 3PL to 5PL, and a first volume range V₁5PL to 8PL, and when the ink volume of the printing target is 10PL, the first nozzle 11 may be selected to print 8PL once and the second nozzle 21 may print 2PL once, without selecting the first nozzle11 prints 8PL once and the second nozzle 21 prints 1PL twice. When the printing times of the nozzles used for printing are different, for example, the first nozzle prints 2 times, the second nozzle prints 1 time, when the first nozzle passes over the substrate, the first nozzle prints 1 time, the second nozzle prints 1 time, and the remaining 1 time of the first nozzle prints needs to be completed when the nozzle passes over the substrate again. By selecting the combination of the nozzles used from the above as the printing scheme, the printing can be completed by scanning the substrate once by the head. For example, the first nozzle prints 2 times and the second nozzle prints 2 times, and when the first nozzle passes over the substrate, the first nozzle prints 2 times and the second nozzle prints 2 times, the printing of the target can be completed.

Optionally, when the selected number of combinations is greater than 1, the step of generating a printing scheme for printing the target substrate according to the first preset parameter and the second preset parameter may further include: and calculating the distance between each nozzle right opposite to the printing target and the center of the printing target, comparing the distance between each nozzle and the center of the printing target, and selecting the nozzle with the minimum distance from the center of the printing target as the nozzle for printing in the printing target. When more than one printing scheme is selected, the nozzle with the smallest distance from the printing center can be selected as the nozzle for printing, so that the accuracy of ink printing can be further improved.

Step 103: and providing a substrate, and printing on the substrate according to the printing scheme to obtain a target substrate.

In step 103, the inkjet printhead 100 passes one complete pass over the substrate, completing printing of the same color print target in the target substrate. The ink jet print head 100 can perform ink jetting once or more times during the time when it stays above the printing object, and complete printing of the same column of the printing object, i.e., one pixel column. The number of times each ink-jet head is turned on in printing the same pixel column is the same, whereby the time required for ink-jet printing can be shortened.

The present application also provides an inkjet printing apparatus, which includes an input module M1, a storage module M2, a calculation module M3, and an output module M4.

The input module M1 is configured to input a first preset parameter and a second preset parameter of a target substrate to be printed, where the first preset parameter includes an area, coordinates, an ink volume, and a starting point of printing of a printing target on the target substrate; the second preset parameter comprises the area, the coordinate and the printing volume range of the nozzle of the ink jet printing head.

A storage module M2, configured to store the first preset parameter and the second preset parameter.

A calculating module M3, configured to generate a printing scheme for printing the target substrate according to the first preset parameter and the second preset parameter, where the printing scheme includes coordinates of the nozzles used in printing, a printing volume of the nozzles, and a number of times of printing.

The calculation module M3 is specifically configured to: matching the coordinates of the printing target with the coordinates of the nozzles, selecting the nozzles matched with the coordinates of the printing target, enumerating that the sum of the products of the printing volumes of the nozzles and the number of times of printing is equal to all combinations of the ink volumes of the printing target to be printed, and selecting the combination with the smallest number of times of printing as the printing scheme.

Further, the calculation module M3 can select, as the printing scheme, a combination in which the number of prints of each of the nozzles used is the same, when the sum of the products of the print volumes and the number of prints of the enumerated nozzles is equal to two or more of all combinations of the ink volumes of the printing targets to be printed, from which it is necessary to use the nozzles. Alternatively, the calculating module M3 may be configured to calculate a distance between each nozzle directly opposite to the print target and the center of the print target when the selected number of combinations is greater than 1, compare the distances between each nozzle and the center of the print target, and select a nozzle with the smallest distance from the center of the print target as the nozzle to print in the print target.

The output module M4 is used to output the printing scheme calculated by the calculation module M3 to the inkjet printing mechanism.

The foregoing provides a detailed description of embodiments of the present application, and the principles and embodiments of the present application have been described herein using specific examples, which are presented solely to aid in the understanding of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.