CN114536974A - Ink-jet printing device and ink-jet printing method thereof - Google Patents
Ink-jet printing device and ink-jet printing method thereof Download PDFInfo
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- CN114536974A CN114536974A CN202210134597.3A CN202210134597A CN114536974A CN 114536974 A CN114536974 A CN 114536974A CN 202210134597 A CN202210134597 A CN 202210134597A CN 114536974 A CN114536974 A CN 114536974A
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- 238000007641 inkjet printing Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007639 printing Methods 0.000 claims abstract description 62
- 239000000758 substrate Substances 0.000 claims abstract description 49
- 238000001514 detection method Methods 0.000 claims description 31
- 230000002159 abnormal effect Effects 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 5
- 239000000976 ink Substances 0.000 description 40
- 239000003086 colorant Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000002346 layers by function Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000000427 thin-film deposition Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/07—Ink jet characterised by jet control
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Abstract
The present application provides an inkjet printing apparatus and an inkjet printing method thereof, the inkjet printing apparatus including a plurality of print heads arranged in a first direction, each of the print heads including a plurality of nozzles arranged in a second direction, wherein the second direction is perpendicular to the first direction, any one of the print heads is capable of moving in the second direction relative to the other print heads, the inkjet printing apparatus provided herein, since any one of the print heads is movable in the second direction relative to the other print heads, therefore, the relative position relation of the nozzles in the printing heads can be adjusted, the situation that ink drops cannot be dripped into the pixel defining opening of the display substrate due to the fact that part of the nozzles in the printing heads are forbidden is avoided, the Pass number is reduced, and the printing efficiency of the ink jet printing device is effectively improved.
Description
Technical Field
The application relates to the technical field of ink-jet printing, in particular to an ink-jet printing device and an ink-jet printing method thereof.
Background
With the continuous progress of technology, the quality requirements of display devices are higher and higher. Organic Light Emitting Diode (OLED) display panels have the advantages of self-luminescence, wide viewing angle, low power consumption, fast response speed, etc., and are gradually used in large scale. At present, the main production mode of the OLED display screen is an evaporation method, but the method has low production energy and is only suitable for small size.
Ink Jet Printing (IJP) is a novel technology that can directly perform patterned thin film deposition, can accurately Jet Ink into a sub-pixel region from a solution, and has the characteristics of low cost, long service life of a finished product, suitability for large size and the like. The production of OLEDs by ink-jet printing is simpler and faster than current Evaporation (Evaporation) techniques, which does not waste raw materials, compared to conventional Evaporation methods which ultimately leave only 10% to 40% of the raw materials.
However, in the OLED inkjet printing apparatus in the related art, in the printing process, nozzles (nozzles) of the print head may be blocked or abnormal in ink ejection, in order to ensure the printing quality, an RDI apparatus needs to be used to perform speed and exit deflection angle tests on ink droplets before printing, and the abnormal nozzles are disabled after the RDI tests, if a plurality of continuous nozzles in the print head are disabled, a Pass number (the Pass number refers to the number of times that the print head needs to Pass through a certain area to print an image in the certain area in the printing industry, and only a part of the image ink dots in the area are printed each time) needs to be increased to complete printing, which may greatly increase the printing time and reduce the printing efficiency, and this problem needs to be solved urgently.
Disclosure of Invention
The application provides an ink-jet printing device and an ink-jet printing method thereof, which can effectively solve the problem of low printing efficiency of the existing ink-jet printing device and the existing ink-jet printing method.
In one aspect, the present application provides an inkjet printing apparatus comprising a plurality of printheads arranged in a first direction, each printhead comprising a plurality of nozzles arranged in a second direction, wherein the second direction is perpendicular to the first direction, any printhead being movable relative to the other printheads in the second direction.
Alternatively, the ink droplets ejected from the nozzles in each of the print heads are the same color.
Optionally, the distance between two adjacent nozzles in the second direction is a first gap distance, the distance that the print head moves in the second direction is equal to M first gap distances, M is greater than or equal to 1, and M is an integer.
Optionally, each of the print heads has N rows of the nozzles sequentially arranged in the second direction, where the N rows of the nozzles of each print head include first nozzles with normal ink ejection status and/or second nozzles with abnormal ink ejection status; the ink-jet printing device has an initial first state and a moved second state; in a first state, the N rows of nozzles of each printing head correspond to one another in the first direction;
in the second state, the N rows of nozzles of at least one printing head do not correspond to the N rows of nozzles of other printing heads one by one,
the ink-jet printing device is provided with at least one first nozzle in a first direction corresponding to N rows of nozzles of at least one printing head in a first state or a second state, N is not less than 2, and N is an integer.
Optionally, the inkjet printing apparatus includes a detection module, where the detection module is configured to detect a printing status of each nozzle, divide the nozzle into the first nozzle or the second nozzle according to a detection result, and disable the second nozzle.
Optionally, the inkjet printing apparatus further includes a control module, where the control module is connected to the detection module, and the control module is configured to adjust a position of each print head according to a distribution of the first nozzles and the second nozzles provided by the detection module, so as to switch the inkjet printing apparatus from a first state to a second state.
Optionally, the inkjet printing apparatus further comprises a carrying table for carrying a display substrate, the display substrate being movable in the first direction relative to each of the print heads.
Optionally, the display substrate comprises: a substrate and a pixel defining layer disposed on the substrate, the pixel defining layer including a plurality of pixel defining openings, each pixel defining opening corresponding to a plurality of nozzles in at least one of the printheads.
In another aspect, the present application provides an inkjet printing method of an inkjet printing apparatus, where the inkjet printing apparatus includes a detection module, a control module, a loading platform, and a plurality of print heads arranged along a first direction, each print head includes N rows of nozzles arranged along a second direction, where the second direction is perpendicular to the first direction, any print head can move in the second direction relative to other print heads, N is greater than or equal to 2, and N is an integer, and the inkjet printing method includes the following steps:
testing the volume, the speed and the emergent deflection angle of ink drops ejected by each nozzle by using the detection module so as to divide the nozzles into first nozzles with normal ink jet states and second nozzles with abnormal ink jet states, and forbidding the second nozzles;
the control module adjusts or maintains the position of each printing head according to the distribution condition of the first nozzles and the second nozzles provided by the detection module, so that at least one first nozzle is arranged in each of the first directions corresponding to N rows of nozzles of at least one printing head;
and arranging a display substrate on the bearing table, wherein the display substrate can move in a first direction relative to each printing head, and the ink-jet printing device performs ink-jet printing on the display substrate through the first nozzle.
Optionally, the inkjet printing apparatus has an initial first state and a moved second state; in a first state, the N rows of nozzles of each printing head correspond to one another in the first direction; in the second state, the N rows of nozzles of at least one printing head do not correspond to the N rows of nozzles of other printing heads one by one,
the control module judges whether the inkjet printing device in the first state meets the requirement that the inkjet printing device has at least one first nozzle in a first direction corresponding to N rows of nozzles of at least one printing head according to the distribution conditions of the first nozzles and the second nozzles provided by the detection module, and if so, the inkjet printing device is kept in the first state; if not, adjusting the position of each printing head to switch the inkjet printing device from the first state to the second state, so that at least one first nozzle is arranged in each of the first directions corresponding to the N rows of nozzles of at least one printing head.
In the inkjet printing device and the inkjet printing method thereof provided by the application, as any one of the printing heads can move in the second direction relative to the other printing heads, the relative position relationship of each nozzle in the plurality of printing heads can be adjusted, the situation that ink drops cannot be dropped into a pixel defining opening of a display substrate due to the fact that part of the nozzles in each printing head are forbidden is avoided, the Pass number is reduced, and the printing efficiency of the inkjet printing device is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below 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 view illustrating a position of a print head and a display substrate in a first direction of an inkjet printing apparatus according to an embodiment of the present disclosure;
fig. 2 is a schematic view illustrating a position correspondence between a print head and a display substrate in a first direction in a second state of the inkjet printing apparatus provided in the present application;
fig. 3 is a schematic flow chart of an inkjet printing method of the inkjet printing apparatus provided in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials. The following are detailed below, and it should be noted that the order of description of the following examples is not intended to limit the preferred order of the examples.
The application provides an inkjet printing device, inkjet printing device is used for carrying out the inkjet print job to display substrate to the ink droplet that will have specific attribute passes through nozzle among the inkjet printing device drips into display substrate's particular region. As an example, the display substrate is, for example, an OLED display substrate, and the display substrate includes: the ink jet printing device comprises a substrate and a pixel defining layer arranged on the substrate, wherein the pixel defining layer comprises a plurality of pixel defining openings (also called pixel pits), the ink drops are ink with specific electroluminescent colors, for example, the ink with the specific electroluminescent colors is dripped into the corresponding pixel defining openings on the display substrate through the nozzles, and therefore, the ink jet printing work of the pixels with the corresponding luminescent colors is completed.
In the prior art, nozzles of a print head may be blocked or abnormal in ink ejection, when a plurality of consecutive nozzles that are blocked or abnormal in ink ejection are disabled in the inkjet printing apparatus, a problem that a corresponding ink droplet cannot be smoothly dropped into a portion of pixel definition openings corresponding to pixels of the same emission color during printing may occur, and in such a case, a Pass number needs to be increased to complete printing, so that printing time is increased, and printing efficiency is reduced.
Fig. 1 is a schematic view illustrating a position of a print head and a display substrate in a first direction of an inkjet printing apparatus according to an embodiment of the present disclosure; fig. 2 is a schematic diagram illustrating a position correspondence between a print head and a display substrate in a first direction in a second state of the inkjet printing apparatus provided by the present application. Referring to fig. 1 and 2, the present application provides an inkjet printing apparatus including a plurality of print heads 100 arranged along a first direction X, each print head 100 including a plurality of nozzles 110 arranged along a second direction Y, wherein the second direction Y is perpendicular to the first direction X. It should be noted that, the present application does not limit the specific directions of the first direction and the second direction, for example, in other embodiments of the present application, the first direction may be a Y direction shown in the figure, and the second direction is correspondingly an X direction. Preferably, the first direction is parallel to a long axis direction of the pixel or a short axis direction of the pixel defining opening, and the second direction is perpendicular to the long axis direction of the pixel or the long axis direction of the pixel defining opening.
In this embodiment, any one of the print heads 100 is capable of moving in the second direction Y relative to the other print heads 100, and since any one of the print heads 100 is capable of moving in the second direction Y relative to the other print heads 100, the relative position relationship of the nozzles 110 in the plurality of print heads 100 can be adjusted, thereby avoiding the situation that ink droplets cannot be dropped into the pixel defining openings of the display substrate 10 due to the disabling of some of the nozzles 110 in the print heads 100, reducing the Pass number, and effectively improving the printing efficiency of the inkjet printing apparatus.
In this embodiment, the plurality of print heads 100 includes, for example, a first print head 101, a second print head 102, and a third print head 103, the first print head 101, the second print head 102, and the third print head 103 constitute an Ink filling element (Ink Stick), the relative positions between the first print head 101, the second print head 102, and the third print head 103 can be freely adjusted, the structural parameters and the colors of ejected Ink droplets of each nozzle 110 in the first print head 101, each nozzle 110 in the second print head 102, and each nozzle 110 in the third print head 103 are the same, that is, the nozzle 110 in each print head 100 corresponds to a pixel on the display substrate 10 having the same emission color, and the Ink droplets ejected by the nozzle 110 in each print head 100 have the same electroluminescence color. Note that, the description of the ink droplets having the same color is given by taking the ink droplets as an example of an ink for forming a light-emitting functional layer in the display substrate 10, and the present application does not limit the ink droplet property of each of the nozzles 110 in the plurality of print heads 100, and the ink droplets may also be inks for defining other functional layers in an opening for forming a pixel of the display substrate 10.
In this embodiment, the distance between two adjacent nozzles 110 in the second direction Y is a first gap distance, the distance that the print head 100 moves in the second direction Y is equal to M first gap distances, M is greater than or equal to 1, and M is an integer. That is, the minimum distance that any one of the print heads 100 moves relative to the other print heads 100 in the second direction Y is the first gap distance, so that the corresponding relationship of the nozzles 110 in each print head 100 in the first direction X can be ensured, and the corresponding relationship of the positions of the nozzles 110 and the pixel-defined openings on the display substrate 10 can be ensured. It should be noted that "any one of the print heads 100 moves in the second direction Y relative to the other print heads 100" herein does not include a case where a certain print head 100 is stationary relative to another print head 100.
With continued reference to fig. 1 and fig. 2, in this embodiment, N rows of the nozzles 110 are sequentially arranged in each of the print heads 100 in the second direction Y, and two nozzles 110 located in an edge area of the N rows of the nozzles 110 respectively correspond to two rows of pixel defining openings located in the edge area on the display substrate 10, where each pixel defining opening corresponds to a plurality of the print heads 100, and each pixel defining opening corresponds to a plurality of rows of the nozzles 110 in the N rows of the nozzles 110 during the printing process. Specifically, the pixel defining openings include, for example, a first pixel defining opening 11, a second pixel defining opening 12, and a third pixel defining opening 13, the first pixel defining opening 11 corresponds to a pixel having a red emission color, the second pixel defining opening 12 corresponds to a pixel having a green emission color, the third pixel defining opening 13 corresponds to a pixel having a blue emission color, when the color of the ink droplet ejected from the nozzle 110 of each print head 100 is red, the 1 st column and the N th column of the N columns of nozzles 110 respectively correspond to two columns of first pixel defining openings 11 located at the edge of the display substrate 10, and one first pixel defining opening 11 may simultaneously correspond to two columns of nozzles 110 of the first print head 101, the second print head 102, and the third print head 103, that is, two adjacent columns of 6 nozzles 110 located on the first print head 101, the second print head 102, and the third print head 103 may drop the same kind of color into the same first pixel defining opening 11 Droplets of a color.
In this embodiment, the N rows of nozzles 110 of each print head 100 include first nozzles 111 with normal ink ejection status and/or second nozzles 112 with abnormal ink ejection status; the ink jet printing device has an initial first state and a moved second state; in a first state, N rows of the nozzles 110 of each of the print heads 100 correspond to one another in the first direction X; in the second state, the N rows of nozzles 110 of at least one of the print heads 100 do not correspond to the N rows of nozzles 110 of the other print heads 100 one to one, wherein in the first state or the second state of the inkjet printing apparatus, the N rows of nozzles 110 of at least one of the print heads 100 all have at least one first nozzle 111 in the first direction X, N is greater than or equal to 2, and N is an integer.
Specifically, in the first state, the position of each print head 100 in the inkjet printing apparatus is in the initial state, and if the inkjet printing apparatus does not satisfy the condition that "at least one first nozzle 111 is provided in the first direction X corresponding to each of the N rows of nozzles 110 of at least one print head 100" in the first state, it means that each pixel definition opening corresponding to the same pixel cannot drop an ink droplet under 1Pass during the inkjet printing process; at this time, the inkjet printing apparatus may be switched from the first state to the second state, and each print head 100 in the inkjet printing apparatus is correspondingly adjusted and moved, so that at least one first nozzle 111 is disposed in the first direction X corresponding to each of the N rows of nozzles 110 of at least one print head 100, thereby effectively avoiding a situation that an ink droplet cannot be dropped into a pixel defining opening of the display substrate 10 due to the fact that some nozzles 110 in the print head 100 are disabled, reducing the Pass number, and improving the printing efficiency of the inkjet printing apparatus.
In this embodiment, the inkjet printing apparatus includes a detection module, and the detection module is configured to detect a printing state of each nozzle 110, divide the nozzle 110 into the first nozzle 111 or the second nozzle 112 according to a detection result, and disable the second nozzle 112. Specifically, the detection module is an RDI device, and the RDI device can detect the volume, speed, and angle of the ink droplet, and process and analyze the detection result, so as to screen out the abnormal nozzles 110 of each print head 100, mark the abnormal nozzles 110 as the second nozzles 112, and disable the abnormal nozzles, so as to avoid the influence of the abnormal second nozzles 112 in the ink jet state on the printing quality of the display substrate 10, and ensure the ink jet printing effect and the display effect of the display substrate 10.
In this embodiment, the inkjet printing apparatus further includes a control module, where the control module is connected to the detection module to receive an electrical signal output by the detection module, where the electrical signal includes distribution of the first nozzles 111 and the second nozzles 112 in each of the print heads 100 in a first state, and the control module is capable of determining, according to the distribution of the first nozzles 111 and the second nozzles 112 provided by the detection module, whether the inkjet printing apparatus in the first state satisfies a condition that "at least one first nozzle 111 is provided in each of the first directions X corresponding to N rows of the nozzles 110 of at least one print head 100", and if so, the inkjet printing apparatus continues to maintain the first state; if not, the control module may adjust the position of each print head 100 according to the distribution of the first nozzles 111 and the second nozzles 112 provided by the detection module, so as to switch the inkjet printing apparatus from the first state to the second state, so that at least one first nozzle 111 is disposed in each of the first directions X corresponding to N rows of the nozzles 110 of at least one print head 100.
In this embodiment, the inkjet printing apparatus further includes a carrying table 200 for carrying a display substrate 10, and the display substrate 10 is capable of moving in the first direction X relative to each of the print heads 100, so that the nozzles 110 on each of the print heads 100 perform inkjet printing on pixel-defined openings located at different positions of the display substrate 10, wherein, during the printing process, each of the print heads 100 is in a fixed state, so that the form and dropping timing of ink droplets can be better controlled, and the printing quality of inkjet printing can be improved.
On the other hand, the embodiment of the application also provides an ink jet printing method of the ink jet printing device. Specifically, fig. 3 is a schematic flow chart of an inkjet printing method of an inkjet printing apparatus provided in the present application, and as shown in fig. 1 to 3, the inkjet printing apparatus includes a detection module, a control module, a loading platform 200, and a plurality of print heads 100 arranged along a first direction X, each print head 100 includes N rows of nozzles 110 arranged along a second direction Y, where the second direction Y is perpendicular to the first direction X, any print head 100 can move in the second direction Y relative to other print heads 100, N is greater than or equal to 2, and N is an integer, and the inkjet printing method includes the following steps:
testing the volume, speed and emergent deflection angle of the ink drop ejected by the nozzle 110 by using the detection module so as to distinguish the nozzle 110 into a first nozzle 111 with a normal ink ejection state and a second nozzle 112 with an abnormal ink ejection state, and forbidding the second nozzle 112;
the control module adjusts or maintains the position of each print head 100 according to the distribution of the first nozzles 111 and the second nozzles 112 provided by the detection module, so that at least one first nozzle 111 is arranged in each of the first directions X corresponding to N columns of the nozzles 110 of at least one print head 100;
a display substrate 10 is disposed on the carrier 200, the display substrate 10 is movable in a first direction X relative to each of the print heads 100, and the inkjet printing apparatus performs inkjet printing on the display substrate 10 through the first nozzles 111.
In this embodiment, the inkjet printing apparatus has an initial first state and a moved second state; in a first state, N rows of the nozzles 110 of each of the print heads 100 correspond to one another in the first direction X; in a second state, the N rows of nozzles 110 of at least one of the print heads 100 do not correspond to the N rows of nozzles 110 of the other print heads 100 in a one-to-one manner, wherein the control module determines, according to the distribution of the first nozzles 111 and the second nozzles 112 provided by the detection module, whether the inkjet printing apparatus in the first state satisfies "at least one first nozzle 111 is provided in each of the first directions X corresponding to the N rows of nozzles 110 of at least one of the print heads 100", and if so, the inkjet printing apparatus is kept in the first state and performs a printing operation on the display substrate 10 on the carrier 200; if not, adjusting the position of each print head 100 to switch the inkjet printing apparatus from the first state to the second state, so that at least one first nozzle 111 is arranged in the first direction X corresponding to each of the N rows of nozzles 110 of at least one print head 100, and then maintaining the second state to perform a printing operation on the display substrate 10 on the carrier 200.
In summary, the present application provides an inkjet printing apparatus and an inkjet printing method thereof, the inkjet printing apparatus including a plurality of print heads arranged in a first direction, each of the print heads including a plurality of nozzles arranged in a second direction, wherein the second direction is perpendicular to the first direction, any one of the print heads is capable of moving in the second direction relative to the other print heads, the inkjet printing apparatus provided herein, since any one of the print heads is movable in the second direction relative to the other print heads, therefore, the relative position relation of the nozzles in the printing heads can be adjusted, the situation that ink drops cannot be dripped into the pixel defining opening of the display substrate due to the fact that part of the nozzles in the printing heads are forbidden is avoided, the Pass number is reduced, and the printing efficiency of the ink jet printing device is effectively improved.
The foregoing detailed description is directed to an inkjet printing apparatus and an inkjet printing method thereof provided in the embodiments of the present application, and the principles and embodiments of the present application are described herein by using specific examples, which are only used to help understand the methods and core ideas 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.
Claims (10)
1. An inkjet printing apparatus comprising a plurality of printheads arranged in a first direction, each printhead comprising a plurality of nozzles arranged in a second direction, wherein the second direction is perpendicular to the first direction, any printhead being movable relative to the other printheads in the second direction.
2. Inkjet printing apparatus according to claim 1 wherein the nozzles in each of the print heads eject ink drops of the same colour.
3. Inkjet printing apparatus according to claim 2 wherein the spacing between two adjacent nozzles in the second direction is a first gap distance, the distance that the printhead moves in the second direction is equal to M of the first gap distances, M is greater than or equal to 1, and M is an integer.
4. The inkjet printing apparatus according to claim 3, wherein each of the print heads has N rows of the nozzles arranged in sequence in the second direction, the N rows of the nozzles of each of the print heads including first nozzles having a normal ink ejection state and/or second nozzles having an abnormal ink ejection state; the ink-jet printing device has an initial first state and a moved second state; in a first state, the N rows of nozzles of each printing head correspond to one another in the first direction; in the second state, the N rows of nozzles of at least one printing head do not correspond to the N rows of nozzles of other printing heads one by one,
the ink-jet printing device is provided with at least one first nozzle in a first direction corresponding to N rows of nozzles of at least one printing head in a first state or a second state, N is not less than 2, and N is an integer.
5. The inkjet printing apparatus according to claim 4, wherein the inkjet printing apparatus includes a detection module, and the detection module is configured to detect a printing status of each of the nozzles, divide the nozzle into the first nozzle or the second nozzle according to a detection result, and disable the second nozzle.
6. The inkjet printing apparatus according to claim 5, further comprising a control module, wherein the control module is connected to the detection module, and the control module is configured to adjust a position of each of the print heads according to a distribution of the first nozzles and the second nozzles provided by the detection module, so as to switch the inkjet printing apparatus from the first state to the second state.
7. Inkjet printing apparatus according to claim 1 further comprising a stage for carrying a display substrate, the display substrate being movable in the first direction relative to each of the printheads.
8. Inkjet printing apparatus according to claim 7 wherein the display substrate comprises: a substrate and a pixel defining layer disposed on the substrate, the pixel defining layer including a plurality of pixel defining openings, each pixel defining opening corresponding to a plurality of nozzles in at least one of the printheads.
9. An inkjet printing method of an inkjet printing device is characterized in that the inkjet printing device comprises a detection module, a control module, a bearing table and a plurality of printing heads arranged along a first direction, each printing head comprises N rows of nozzles arranged along a second direction, the second direction is perpendicular to the first direction, any printing head can move relative to other printing heads in the second direction, N is not less than 2, and N is an integer, and the inkjet printing method comprises the following steps:
testing the volume, the speed and the emergent deflection angle of ink drops ejected by each nozzle by using the detection module so as to divide the nozzles into first nozzles with normal ink jet states and second nozzles with abnormal ink jet states, and forbidding the second nozzles;
the control module adjusts or maintains the position of each printing head according to the distribution condition of the first nozzles and the second nozzles provided by the detection module, so that at least one first nozzle is arranged in each of the first directions corresponding to N rows of nozzles of at least one printing head;
and arranging a display substrate on the bearing table, wherein the display substrate can move in a first direction relative to each printing head, and the ink-jet printing device performs ink-jet printing on the display substrate through the first nozzle.
10. The method of inkjet printing according to claim 9 wherein the inkjet printing apparatus has an initial first state and a moved second state; in a first state, the N rows of nozzles of each printing head correspond to one another in the first direction; in the second state, N rows of the nozzles of at least one of the print heads do not correspond to N rows of the nozzles of the other print heads one to one,
the control module judges whether the inkjet printing device in the first state meets the requirement that the inkjet printing device has at least one first nozzle in a first direction corresponding to N rows of nozzles of at least one printing head according to the distribution conditions of the first nozzles and the second nozzles provided by the detection module, and if so, the inkjet printing device is kept in the first state; if not, adjusting the position of each printing head to switch the inkjet printing device from the first state to the second state, so that at least one first nozzle is arranged in each of the first directions corresponding to the N rows of nozzles of at least one printing head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210134597.3A CN114536974A (en) | 2022-02-14 | 2022-02-14 | Ink-jet printing device and ink-jet printing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210134597.3A CN114536974A (en) | 2022-02-14 | 2022-02-14 | Ink-jet printing device and ink-jet printing method thereof |
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| JP2005081642A (en) * | 2003-09-08 | 2005-03-31 | Mutoh Ind Ltd | Printing device |
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