CN114211878B - Detection method, storage medium and equipment for ink-jet printing ink - Google Patents
Detection method, storage medium and equipment for ink-jet printing ink Download PDFInfo
- Publication number
- CN114211878B CN114211878B CN202111521918.7A CN202111521918A CN114211878B CN 114211878 B CN114211878 B CN 114211878B CN 202111521918 A CN202111521918 A CN 202111521918A CN 114211878 B CN114211878 B CN 114211878B
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- Prior art keywords
- ink
- pattern
- standard
- ink drop
- nozzle
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- 238000007641 inkjet printing Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 238000003860 storage Methods 0.000 title claims abstract description 14
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000004590 computer program Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000012216 screening Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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
-
- 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
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
- G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/70—Determining position or orientation of objects or cameras
Abstract
The embodiment of the application discloses a detection method, a storage medium and equipment of ink-jet printing ink, wherein the detection method of the ink-jet printing ink comprises the following steps: presetting a standard pattern, wherein the standard pattern is an ideal pattern of ink dripping on a test substrate at a first preset position; controlling a nozzle above the test substrate to be opened, wherein the nozzle is correspondingly arranged at the first preset position; shooting the ink drop patterns of the ink drops in the nozzle on the test substrate through the camera module; comparing the ink drop patterns with the standard patterns, and determining whether the area difference value and the position offset of each ink drop pattern and the standard patterns are smaller than a preset threshold value, if so, the nozzles corresponding to the ink drop patterns are qualified, and if not, the nozzles corresponding to the ink drop patterns are unqualified.
Description
Technical Field
The present application relates to the field of inkjet testing, and in particular, to a method for detecting inkjet printing ink, a storage medium, and a device.
Background
The OLED inkjet printing technology is an emerging OLED manufacturing technology, mainly using solvents to melt OLED organic materials, and then directly inkjet-printing the materials on the surface of a substrate through an inkjet printhead and inkjet printing equipment to form R (red), G (green), and B (blue) organic light emitting layers. The ink solution for ink-jet printing the OLED display screen mainly comprises electroluminescent materials, solvents and the like, the rheological property (viscosity, surface tension and shear rate) of the ink solution needs to meet the requirements of ink-jet printing equipment, and stable liquid drops can be formed, wherein the stable liquid drops comprise no satellite points, good repeatability, accurate positioning and the like; the solvent cannot volatilize too quickly to prevent the dried solute from clogging the printhead and causing print failure.
In addition to OLED inkjet printing, in any other field of inkjet printing process, it is often necessary to check and screen the inkjet status of each nozzle hole, including the volume, velocity and offset angle of the ink drops, by ink drop detection. At present, the common visual ink drop observation is slower in batch detection of multiple spray holes, only the offset of ink drops on a two-dimensional plane can be observed, and laser ink drop observation equipment is high in price and has the limit of service life of a laser system.
Disclosure of Invention
The embodiment of the application provides a detection method, a storage medium and equipment for ink-jet printing ink, which can solve the technical problem that the detection efficiency of the ink-jet printing ink in the prior art is too low.
The embodiment of the application provides a detection method of ink-jet printing ink, which comprises the following steps:
presetting a standard pattern, wherein the standard pattern is an ideal pattern of ink dripping on a test substrate at a first preset position;
controlling a nozzle above the test substrate to be opened, wherein the nozzle is correspondingly arranged at the first preset position;
shooting the ink drop patterns of the ink drops in the nozzle on the test substrate through the camera module; comparing the ink drop patterns with the standard patterns, and determining whether the area difference value and the position offset of each ink drop pattern and the standard patterns are smaller than a preset threshold value, if so, the nozzles corresponding to the ink drop patterns are qualified, and if not, the nozzles corresponding to the ink drop patterns are unqualified.
Optionally, in some embodiments of the present application, a side of the test substrate facing the showerhead is a plane, and the plane is disposed horizontally.
Optionally, in some embodiments of the present application, a coordinate system is defined on the plane of the test substrate, the ink drop pattern corresponds to an actual coordinate on the plane, the standard pattern corresponds to a standard coordinate on the plane, a coordinate difference between the actual coordinate and the standard coordinate is obtained, and the offset of the drop position is obtained according to the coordinate difference.
Optionally, in some embodiments of the present application, an area of the ink droplet pattern is calculated as an actual area, an area of the standard pattern is a standard area, and an area difference between the actual area and the standard area is obtained.
Alternatively, in some embodiments of the present application, the difference between the drop volume corresponding to the drop pattern and the drop volume corresponding to the standard pattern is calculated based on the area difference.
Optionally, in some embodiments of the present application, the standard pattern is an ideal pattern of ink captured by the image capturing module at the second preset position dropping on the test substrate at the first preset position.
Optionally, in some embodiments of the present application, the first preset position and the second preset position are identical in height.
Alternatively, in some embodiments of the present application, the camera module and the nozzle are integrally disposed on the same nozzle module.
Correspondingly, the embodiment of the application also provides computer equipment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the detection method of the ink-jet printing ink when executing the computer program.
Accordingly, embodiments of the present application also provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method for detecting inkjet printing ink.
The detection method, the storage medium and the equipment for the ink-jet printing ink have the advantages that a standard pattern is predefined, compared with an actual ink drop pattern of a nozzle shot by a camera and dropped on a test substrate, the offset of the nozzle is calculated by calculating the position offset of the ink drop pattern and the standard pattern, the volume value of the ink drop is calculated by calculating the area difference value of the ink drop pattern and the standard pattern, so that the opening size of the nozzle is calculated, the rapid screening of the nozzle which does not meet the requirements is facilitated, and meanwhile, the corresponding nozzle can be adjusted according to the calculated value, so that the nozzle meets the requirements.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for detecting ink jet printing ink according to an embodiment of the present application;
FIG. 2 is a plan view of a standard pattern A provided by an embodiment of the present application;
fig. 3 is a plan view of a standard pattern B provided in an embodiment of the present application;
fig. 4 is a schematic illustration of ink drop landing after opening a nozzle switch according to an embodiment of the present application.
Reference numerals illustrate:
a test substrate 1; a plane 11; a nozzle 2; and a camera module 3.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the application. In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
Examples
As shown in fig. 1, in this embodiment, the present application provides a method for detecting ink for inkjet printing, which can detect a plurality of nozzles in a large scale, and is fast, effective and low in cost, and the specific steps are as follows:
s1) as shown in FIG. 2, a standard pattern A is preset, wherein the standard pattern A is an ideal pattern of ink drops on the test substrate 1 at a first preset position.
S2) a plurality of nozzles 2 are arranged above the test substrate 1, and the nozzles 2 are arranged at the first preset positions, so that when the nozzles 2 are turned on and off, ink drops in the nozzles 2 can drop at the first preset positions.
S3) as shown in FIG. 3 and FIG. 4, the switch of the nozzle 2 is turned on, in this embodiment, the test substrate 1 includes a plane 11, the plane 11 is disposed on the horizontal plane, the ink drops fall on the plane 11 to form an ink drop pattern B, the image pickup module 3 is adopted to pick up the ink drop pattern B of the ink drops falling on the plane 11, the image pickup module 3 is disposed at the first preset position, the image pickup module 3 and the nozzle 2 are integrally disposed on the same nozzle module, in other preferred embodiments of the present application, the image pickup module 3 is disposed at the second preset position, and the standard pattern A is equal to the ideal pattern of the ink drops falling on the test substrate 1 at the first preset position when the image pickup module 3 picks up the ink drops at the second preset position.
S4) comparing the ink drop pattern B with the standard pattern A, and determining whether each ink drop pattern B is completely overlapped with the standard pattern A, wherein the overlapping in the embodiment is that the ink drop pattern B is compared with the standard pattern A, and determining whether the area difference value and the position offset of each ink drop pattern B and the standard pattern A are smaller than a preset threshold value, wherein the preset threshold value is the maximum error value within an artificially defined allowable range, if so, the nozzle 2 corresponding to the ink drop pattern B is qualified, if not, the nozzle 2 corresponding to the ink drop pattern B is unqualified, and the nozzle 2 corresponding to the ink drop pattern B is closed or adjusted, so that the good and the good screening of a plurality of nozzles is completed.
The three most important parameters of ink droplets for inkjet printing are volume, velocity and angle, the volume size being reflected by the spreading area of the ink droplets on the test substrate 1, and the velocity and angle being reflected by the offset of the landing points. If there is no requirement for the specific size of the parameter, the nozzle 2 is directly screened by the ink drop pattern area and the drop point offset statistical chart, and if the specific ink drop volume of the parameter is required to be known, calibration can be required.
Specifically, a coordinate system is defined on the plane 11, the standard pattern a corresponds to a standard coordinate a on the plane 11, the ink drop pattern B corresponds to an actual coordinate B on the plane 11, a coordinate difference between the standard coordinate a and the actual coordinate B is obtained, and according to the coordinate difference, the offset of the drop position corresponding to the ink drop pattern B can be obtained. Thereby, the amount of deviation of the nozzle 2 corresponding to the ink droplet pattern B is calculated.
Since the standard pattern a and the ink drop pattern B are both patterns of ink dropped on the test substrate at the first preset position, the difference of the areas of the standard pattern a and the ink drop pattern B can be calculated to calculate the difference of the volumes of the ink drops corresponding to the ink drop pattern B relative to the ink drops corresponding to the standard pattern, thereby calculating the opening size of the nozzle 2 corresponding to the ink drop pattern B.
In an embodiment of the present application, there is also provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the detection method of inkjet printing ink as described above.
The computer storage medium stores a computer program for determining the offset of the drop position by calculating and acquiring the coordinate difference between the quasi-coordinates a and the actual coordinates b by detecting the actual position coordinates of the drop of the ink drop by implementing the detection method including the ink jet printing ink as in the above embodiment.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The detection method, the storage medium and the equipment for the ink-jet printing ink have the advantages that a standard pattern is predefined, compared with an actual ink drop pattern of a nozzle shot by a camera and dropped on a test substrate, the offset of the nozzle is calculated by calculating the position offset of the ink drop pattern and the standard pattern, the volume value of the ink drop is calculated by calculating the area difference value of the ink drop pattern and the standard pattern, so that the opening size of the nozzle is calculated, the rapid screening of the nozzle which does not meet the requirements is facilitated, and meanwhile, the corresponding nozzle can be adjusted according to the calculated value, so that the nozzle meets the requirements.
The detection method, the storage medium and the device for ink-jet printing ink provided by the embodiment of the application are described in detail, and specific examples are applied to illustrate the principle and the implementation of the application, and the description of the above examples is only used for helping to understand the method and the core idea of the application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (3)
1. The detection method of the ink-jet printing ink is used for the ink-jet printing of OLED display and is characterized by comprising the following steps:
presetting a standard pattern, wherein the standard pattern is an ideal pattern of ink dripping on a test substrate at a first preset position;
controlling a nozzle above the test substrate to be opened, wherein the nozzle is correspondingly arranged at the first preset position;
shooting the ink drop patterns of the ink drops in the nozzle on the test substrate through the camera module;
comparing the ink drop patterns with the standard patterns, and determining whether the area difference value and the position offset of each ink drop pattern and the standard pattern are smaller than a preset threshold value, if yes, the nozzle corresponding to the ink drop pattern is qualified, if not, the nozzle corresponding to the ink drop pattern is unqualified, and closing or adjusting the nozzle corresponding to the ink drop pattern;
the method comprises the steps that one side, facing a nozzle, of a test substrate is a plane, the plane is horizontally arranged, a coordinate system is defined on the plane of the test substrate, ink drop patterns correspond to actual coordinates on the plane, standard patterns correspond to standard coordinates on the plane, a coordinate difference value between the actual coordinates and the standard coordinates is obtained, and the offset of the drop position of the ink drop is obtained according to the coordinate difference value;
calculating the area of the ink drop pattern as an actual area, the area of the standard pattern as a standard area, obtaining an area difference value between the actual area and the standard area, and calculating a difference value between the ink drop volume corresponding to the ink drop pattern and the ink drop volume corresponding to the standard pattern based on the area difference value; the camera module and the nozzles are integrally arranged on the same nozzle module, the camera module is positioned at the center position among the nozzles, and the standard pattern is an ideal pattern of ink shot by the camera module and dripped on the test substrate at a first preset position.
2. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for detecting inkjet printing ink according to claim 1 when the computer program is executed by the processor.
3. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the detection method of inkjet printing ink according to any one of claims 1 to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111521918.7A CN114211878B (en) | 2021-12-13 | 2021-12-13 | Detection method, storage medium and equipment for ink-jet printing ink |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111521918.7A CN114211878B (en) | 2021-12-13 | 2021-12-13 | Detection method, storage medium and equipment for ink-jet printing ink |
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| CN114211878A CN114211878A (en) | 2022-03-22 |
| CN114211878B true CN114211878B (en) | 2023-10-17 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246266B (en) * | 2022-07-26 | 2023-10-20 | 合肥京东方卓印科技有限公司 | Printing control method, printing control device, electronic equipment and computer readable storage medium |
| CN116061583B (en) * | 2023-02-03 | 2023-06-20 | 季华实验室 | OLED (organic light emitting diode) ink-jet printing data processing and controlling method |
| CN117268738B (en) * | 2023-11-20 | 2024-03-12 | 季华实验室 | Nozzle detection method, device, equipment and storage medium |
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| EP0988990A2 (en) * | 1998-09-22 | 2000-03-29 | Seiren Co., Ltd. | Ink-jet printer nozzle defect detection method and device |
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