CN110077112B - Method, apparatus and system for drop offset correction of print nozzles - Google Patents
Method, apparatus and system for drop offset correction of print nozzles Download PDFInfo
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- CN110077112B CN110077112B CN201810348782.6A CN201810348782A CN110077112B CN 110077112 B CN110077112 B CN 110077112B CN 201810348782 A CN201810348782 A CN 201810348782A CN 110077112 B CN110077112 B CN 110077112B
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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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- 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
- B41J2/125—Sensors, e.g. deflection sensors
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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
- 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
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
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Abstract
The invention relates to a method, a device, a system, a computer device and a computer readable storage medium for correcting ink drop offset of a printing nozzle, wherein the method comprises the following steps: detecting a longitudinal offset angle and a transverse offset angle of ink drop landing of a printing nozzle; wherein, the longitudinal direction is the moving direction of the printed substrate, and the transverse direction is the moving direction of the printing nozzle; determining a longitudinal offset distance of ink drop landing of the printing nozzle according to the longitudinal offset angle, and determining a transverse offset distance of ink drop landing of the printing nozzle according to the transverse offset angle; and performing compensation correction on the ink drop landing position of the printing nozzle according to the longitudinal offset compensation amount determined by the longitudinal offset distance and the transverse offset compensation amount determined by the transverse offset distance. According to the method, the longitudinal offset distance and the transverse offset distance are obtained for compensation and correction by detecting the longitudinal offset angle and the transverse offset angle of the ink drop of the printing nozzle, so that the offset of the ink drop dropping position of the printing nozzle is avoided, and the printing accuracy of the printing nozzle is improved.
Description
Technical Field
The present invention relates to the field of inkjet printing technologies, and in particular, to a method, an apparatus, a system, a computer device, and a computer-readable storage medium for correcting an ink drop offset of a print nozzle.
Background
Besides being applied to traditional printing of paper character patterns, the inkjet printing technology is widely applied to device manufacturing processes, for example, some functional materials in the OLED device manufacturing process may adopt an inkjet printing process, such as a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), a light emitting layer material (EML), and the like. In the known pixel pits, the functional layer material ink is driven into the pixel pits by an ink-jet printing mode. Depending on the characteristics of the ink jet printing process, the uniformity of the film thickness of the ink filling material in the pixel pits is an important consideration of the process, which requires that the volume of ink dropped into each pixel pit in the ink jet printing process is the same. If some ink drops fall outside the pixel pits, which means that the corresponding falling pixel pits have less ink volume than other pixel pits, the problem that the thickness of the material film is unevenly distributed after the ink material is subjected to reduced-pressure drying and baking processes inevitably occurs, and thus the performance of the device is affected. Therefore, one of the important aspects of the ink jet printing process is the precision with which the ink drops within the pixels.
In an inkjet printing apparatus, an Ink material filling element (Ink stick) and an inkjet head (Print head) located at the bottom of the Ink material filling element are generally provided, and the Ink material is ejected through a Nozzle (Nozzle) on the Print head and is driven into a pixel on a glass substrate. When ink jet printing is performed, the glass substrate to be printed is moved longitudinally in a set direction, and the nozzles of the print head are moved laterally in a direction perpendicular to the moving direction of the glass substrate.
The technical problems at present are as follows: in the printing process, the movement of a printing head nozzle and the movement of a glass substrate easily cause the drop position of an ink drop to generate a deviation error, and the deviation error can cause the drop position of the ink drop to deviate from an ideal drop position when ink-jet printing is carried out, even the ink drop is dropped outside a pixel pit, so that the film thickness of an ink material in the pixel pit on the glass substrate in the ink-jet printing process is not uniform after decompression and drying, and finally the efficiency of an OLED device is abnormal.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a method, an apparatus, a system, a computer device and a computer-readable storage medium for correcting the ink drop offset of a print nozzle, which can correct the ink drop offset of the print nozzle and improve the accuracy of the ink drop landing of the print nozzle.
A method of drop placement correction for a print nozzle, comprising the steps of:
detecting a longitudinal offset angle and a transverse offset angle of ink drop landing of a printing nozzle; wherein, the longitudinal direction is the moving direction of the printed substrate, and the transverse direction is the moving direction of the printing nozzle;
determining the longitudinal offset distance of the ink drop of the printing nozzle according to the longitudinal offset angle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the transverse offset angle;
and performing compensation correction on the ink drop landing positions of the printing nozzles according to the longitudinal offset compensation amount determined by the longitudinal offset distance and the transverse offset compensation amount determined by the transverse offset distance.
According to the ink drop offset correction method for the printing nozzle, before ink jet printing is carried out on a printed substrate, the corresponding longitudinal offset distance and the corresponding transverse offset distance are calculated and obtained by detecting the longitudinal offset angle and the transverse offset angle of ink drop landing of the printing nozzle, and compensation correction is carried out on the longitudinal offset distance and the transverse offset distance of the ink drop, so that the ink drop landing position offset of the printing nozzle can be avoided in the using process of the ink jet printing head, the ink drop landing is caused outside a pixel pit, and the printing accuracy of the printing nozzle is improved.
In one embodiment, the detecting the longitudinal offset angle and the lateral offset angle of the drop landing of the printing nozzle comprises:
acquiring longitudinal detection images and transverse detection images of ink drop landing of all printing nozzles on a printing head; and identifying the longitudinal offset angle of the ink drop of each printing nozzle in the longitudinal direction according to the longitudinal detection image, and identifying the transverse offset angle of the ink drop of each printing nozzle in the transverse direction according to the transverse detection image.
According to the ink drop offset correction method for the printing nozzles, the longitudinal offset angle and the transverse offset angle of the ink drops of each printing nozzle on the printing head can be identified and obtained through the respectively detected longitudinal detection image and transverse detection image of the ink drop landing of each printing nozzle on the printing head, the ink drop offset angle of each printing nozzle on the printing head can be accurately obtained, and the scheme is easy to realize.
In one embodiment, the determining a longitudinal offset distance of drop landing of ink droplets of the printing nozzle according to the longitudinal offset angle and the determining a lateral offset distance of drop landing of ink droplets of the printing nozzle according to the lateral offset angle includes:
acquiring the distance between a printing nozzle and a printed substrate; determining the longitudinal maximum offset angle of the ink drops of the printing nozzles according to the longitudinal offset angle of the ink drops of each printing nozzle, and determining the longitudinal offset distance of the ink drops of the printing nozzles according to the distance and the longitudinal maximum offset angle; and determining the transverse maximum offset angle of the ink drop of the printing nozzle according to the transverse offset angle of the ink drop of each printing nozzle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the distance and the transverse maximum offset angle.
According to the ink drop offset correction method for the printing nozzles, the maximum value in the longitudinal offset angles of the ink drops of all the printing nozzles is used as the longitudinal maximum offset angle, the maximum value in the transverse offset angles of the ink drops of all the printing nozzles is used as the transverse maximum offset angle, the longitudinal offset distance and the transverse offset distance of the ink drops of the printing nozzles are determined, the operation process can be effectively simplified, and the operation efficiency is improved.
In one embodiment, the longitudinal offset distance of drop landing of an ink drop by the print nozzle is given by:
ΔX1＝S×tanαmax
in the above equation, Δ X1 is the offset distance of the print nozzle in the longitudinal direction, αmaxS is the distance between the print nozzle and the substrate to be printed, which is the maximum value of the longitudinal offset angle of each print nozzle.
In one embodiment, the lateral offset distance of drop landing of an ink drop by the print nozzle is given by:
ΔX2＝S×tanβmax
in the above equation, Δ X2 is the offset distance of the print nozzle in the lateral direction, βmaxS is the distance between the print nozzle and the substrate to be printed, which is the maximum value of the lateral offset angle of each print nozzle.
By the scheme, the longitudinal offset distance and the transverse offset distance for acquiring the ink drop landing of the printing nozzle can be simply and quickly calculated.
In one embodiment, the performing a compensation correction on the drop landing positions of the printing nozzles according to the longitudinal offset compensation value determined by the longitudinal offset distance and the lateral offset compensation value determined by the lateral offset distance includes:
before ink-jet printing is carried out on a printed substrate, setting offset compensation amount of longitudinal ink drop dropping of a printing nozzle according to a longitudinal offset distance, setting offset compensation amount of transverse ink drop dropping of the printing nozzle according to a transverse offset distance, and correcting the ink drop dropping position of the printing nozzle.
The ink drop offset correction method of the printing nozzle comprises the steps of setting offset compensation amount of longitudinal ink drop dripping of the printing nozzle according to longitudinal offset distance before ink jet printing is carried out on a printed substrate, setting offset compensation amount of transverse ink drop dripping of the printing nozzle according to transverse offset distance, correcting the ink drop dripping position of the printing nozzle, and further offsetting the influence of the ink drop dripping offset of the printing nozzle.
An ink drop deflection correction device for a print nozzle, comprising:
the offset angle detection module is used for detecting the offset angle of the ink drop of the printing nozzle in the longitudinal direction and the offset angle in the transverse direction; wherein, the longitudinal direction is the moving direction of the printed substrate, and the transverse direction is the moving direction of the printing nozzle;
the offset distance acquisition module is used for determining the offset distance of the printing nozzle in the longitudinal direction and the offset distance in the transverse direction according to the longitudinal offset angle and the transverse offset angle;
and the offset correction module is used for performing compensation correction on the ink drop landing positions of the printing nozzles according to the longitudinal offset distance and the transverse offset distance.
The ink drop offset correction device for the printing nozzle comprises a printing substrate, wherein a printing nozzle is arranged on the printing substrate, and the printing nozzle is arranged on the printing substrate and comprises a plurality of ink drops, wherein the ink drops are arranged in a pixel pit.
A drop deflection correction system for a print nozzle, the system comprising: the device comprises a detection device and a processor connected with the detection device; the detection device is used for detecting and acquiring an image of the drop of the ink droplet of the printing nozzle;
the processor is configured to perform the steps of the method of drop offset correction of a print nozzle as in any of the embodiments above.
According to the ink drop offset correction system for the printing nozzle, before an ink jet printing process, an image of ink drop of the printing nozzle is detected and acquired through the detection device and transmitted to the processor, the processor analyzes and acquires a longitudinal offset angle and a transverse offset angle of the ink drop of the printing nozzle, calculates and acquires a corresponding longitudinal offset distance and a corresponding transverse offset distance, performs compensation correction on the longitudinal offset distance and the transverse offset distance of the ink drop, and performs the ink jet printing process after compensation correction on the ink drop offset in the moving direction of the printing nozzle and the moving direction of a printed substrate is realized. Therefore, the abnormal condition that the ink drops drop outside the pixel pits due to the offset of the ink drop dropping position in the long-term use process of the ink-jet printing head can be avoided, and the printing accuracy of the printing nozzle is improved.
In one embodiment, the detection device comprises a first camera and a second camera;
the first camera faces the printing nozzle in the transverse direction and is used for shooting a longitudinal detection image of ink drop dropping of the printing nozzle; the second camera faces the printing nozzle in the longitudinal direction and is used for shooting a transverse detection image of ink drop dropping of the printing nozzle.
According to the ink drop offset correction system for the printing nozzle, the longitudinal and transverse detection images can be shot by the two groups of cameras respectively, and the scheme is easy to realize.
In one embodiment, the detection device further comprises a first light source and a second light source; the first light source faces the printing nozzle in the transverse direction, is opposite to the first camera and is used for emitting illumination to the printing nozzle when the first camera shoots a longitudinal detection image of ink drop landing of ink drops of the printing nozzle; the second light source faces the printing nozzle in the longitudinal direction, is opposite to the second camera and is used for emitting illumination to the printing nozzle when the second camera shoots a transverse detection image of ink drop dripping of the printing nozzle.
Above-mentioned print nozzle's ink droplet skew correction system, when the image is listened to in the ink droplet drippage of print nozzle ink droplet is shot to the camera, to print nozzle launch illumination, can promote the effect that print nozzle shot the image, promote then and listen the accuracy of the vertical skew angle and the horizontal skew angle of the ink droplet drippage of print nozzle who acquires. And the system can operate without depending on external light source conditions, and the use adaptability of the system is improved.
In one embodiment, the system for drop placement correction for a print nozzle of an embodiment of the present invention further comprises an ink titration cell disposed below the print nozzle for receiving ink drops dropped by the print nozzle.
The ink drop offset correction system of the printing nozzle can prevent the ink drops dropped by the printing nozzle from polluting the environment by receiving the ink drops dropped by the printing nozzle through the ink titration tank.
In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
detecting a longitudinal offset angle and a transverse offset angle of ink drop landing of a printing nozzle; wherein, the longitudinal direction is the moving direction of the printed substrate, and the transverse direction is the moving direction of the printing nozzle;
determining the longitudinal offset distance of the ink drop of the printing nozzle according to the longitudinal offset angle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the transverse offset angle;
and performing compensation correction on the ink drop landing positions of the printing nozzles according to the longitudinal offset compensation amount determined by the longitudinal offset distance and the transverse offset compensation amount determined by the transverse offset distance.
When the processor of the computer equipment executes a program, the steps are realized, so that the corresponding longitudinal offset distance and the corresponding transverse offset distance can be calculated and obtained by detecting the longitudinal offset angle and the transverse offset angle of the ink drop of the printing nozzle before the ink jet printing is carried out on the printed substrate, and the compensation correction is carried out on the longitudinal offset distance and the transverse offset distance of the ink drop, so that the condition that the ink drop of the printing nozzle drops out of a pixel pit due to the offset of the ink drop dropping position in the use process of the ink jet printing head can be avoided, and the printing accuracy of the printing nozzle is improved.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
detecting a longitudinal offset angle and a transverse offset angle of ink drop landing of a printing nozzle; wherein, the longitudinal direction is the moving direction of the printed substrate, and the transverse direction is the moving direction of the printing nozzle;
determining the longitudinal offset distance of the ink drop of the printing nozzle according to the longitudinal offset angle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the transverse offset angle;
and performing compensation correction on the ink drop landing positions of the printing nozzles according to the longitudinal offset compensation amount determined by the longitudinal offset distance and the transverse offset compensation amount determined by the transverse offset distance.
The computer readable storage medium and the stored computer program realize the steps, so that before the ink jet printing is performed on the printed substrate, the corresponding longitudinal offset distance and the corresponding transverse offset distance are calculated and obtained by detecting the longitudinal offset angle and the transverse offset angle of the ink drop of the printing nozzle, and the compensation correction is performed on the longitudinal offset distance and the transverse offset distance of the ink drop, so that the condition that the ink drop of the printing nozzle drops outside the pixel pit due to the offset of the ink drop dropping position in the use process of the ink jet printing head can be avoided, and the printing accuracy of the printing nozzle is improved.
Drawings
FIG. 1 is a diagram of an environment in which a method of drop placement correction for a print nozzle is used in one embodiment;
FIG. 2 is a schematic flow chart diagram of a drop placement correction method for a print nozzle in one embodiment;
FIG. 3 is a schematic view of the direction of movement of the print nozzle and the substrate being printed in one embodiment;
FIG. 4 is a schematic flow chart of a drop offset correction method for a print nozzle in another embodiment;
FIG. 5 is a schematic illustration of an offset angle detection of drop landing of a print nozzle in one embodiment;
FIG. 6 is a schematic illustration of an offset distance of drop landing of a print nozzle in one embodiment;
FIG. 7 is a block diagram showing a droplet deviation correcting means of a print nozzle in one embodiment;
FIG. 8 is a schematic diagram of an embodiment of a drop placement correction system for a print nozzle;
FIG. 9 is a top view of a drop placement correction system for a print nozzle in one embodiment;
FIG. 10 is a diagram showing an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The method for correcting the ink drop offset of the printing nozzle provided by the invention can be applied to an ink drop offset correction system of the printing nozzle shown in figure 1. The system for correcting the ink drop offset of the print nozzle comprises a detection device 110 and a processor 120 connected with the detection device, wherein the detection device 110 detects and acquires an image of the drop 21 of the print nozzle 20 and sends the image to the processor 120, and the processor 120 processes and analyzes the received image to acquire the relevant information of the drop offset of the ink drop 21 of the print nozzle 20 and corrects the drop offset of the ink drop 21 of the print nozzle 20. The processor 120 and the detecting device 110 may be integrated into a single device, or may be separately disposed, for example, the processor 120 may be implemented by a terminal device such as a computer.
In one embodiment, as shown in FIG. 2, a method for drop offset correction of a print nozzle is provided, which is illustrated as applied to the processor of FIG. 1, and comprises the steps of:
s210, detecting a longitudinal offset angle and a transverse offset angle of ink drop landing of a printing nozzle; wherein the longitudinal direction is a moving direction of the printed substrate, and the transverse direction is a moving direction of the printing nozzle.
As shown in fig. 3, taking a printed substrate as a glass substrate as an example, in a core structure of the inkjet printing apparatus, a three-dimensional coordinate system in three directions of X, Y, and Z may be established, where a print head cage (Ink rack cage) may carry a print head (inktilt) to move in the X, Z directions, and the glass substrate may move in the Y direction, where a longitudinal direction is the Y direction in fig. 3 and a transverse direction is the X direction in fig. 3, when the inkjet printing apparatus prints on the glass substrate, a distance between a print head and the substrate may be controlled by controlling the print head to move in the Z direction, and when the print head moves in the X direction, the glass substrate may be controlled to move in the Y direction to perform inkjet printing.
The longitudinal offset angle refers to a component of an included angle between an ink drop dropping track and the Z direction in the Y direction, and the transverse offset angle refers to a component of an included angle between the ink drop dropping track and the Z direction in the X direction;
in this step, the processor detects the vertical offset angle and the horizontal offset angle of the ink drop of the printing nozzle; wherein the longitudinal direction is a moving direction of the printed substrate, and the transverse direction is a moving direction of the printing nozzle.
S220, determining the longitudinal offset distance of the ink drop of the printing nozzle according to the longitudinal offset angle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the transverse offset angle.
The longitudinal offset distance refers to a component of the offset distance between the actual position of the ink drop and the theoretical position of the vertical drop in the longitudinal direction, and the transverse offset distance refers to a component of the offset distance between the actual position of the ink drop and the theoretical position of the vertical drop in the transverse direction.
In this step, the processor determines a longitudinal offset distance of drop landing of ink from the print nozzle according to the longitudinal offset angle and determines a lateral offset distance of drop landing of ink from the print nozzle according to the lateral offset angle.
And S230, performing compensation correction on the ink drop landing positions of the printing nozzles according to the longitudinal offset compensation amount determined by the longitudinal offset distance and the transverse offset compensation amount determined by the transverse offset distance.
According to the ink drop offset correction method for the printing nozzle, before ink jet printing is carried out on a printed substrate, the corresponding longitudinal offset distance and the corresponding transverse offset distance are calculated and obtained by detecting the longitudinal offset angle and the transverse offset angle of ink drop landing of the printing nozzle, and compensation correction is carried out on the longitudinal offset distance and the transverse offset distance of the ink drop, so that the ink drop landing position offset of the printing nozzle can be avoided in the using process of the ink jet printing head, the ink drop landing is caused outside a pixel pit, and the printing accuracy of the printing nozzle is improved.
In one embodiment, as shown in fig. 4, the detecting the vertical offset angle and the horizontal offset angle of the ink drop landing of the printing nozzle in S210 includes:
s211, acquiring longitudinal detection images and transverse detection images of ink drop landing of each printing nozzle on the printing head;
in which a print head generally has a plurality of print nozzles, and in this step, a frame measurement of a drop titration image needs to be performed for each print nozzle. For example, if 128 nozles are provided on one Print head, when a nozle ink drop is performed, it is necessary to perform an ink drop titration for each nozle to obtain a screen of 128 ink drops.
S212, identifying the longitudinal offset angle of the ink drop of each printing nozzle in the longitudinal direction according to the longitudinal detection image, and identifying the transverse offset angle of the ink drop of each printing nozzle in the transverse direction according to the transverse detection image.
As shown in fig. 5, which is a schematic diagram illustrating the detection of the deviation angle of the ink drop landing of the printing nozzle in one embodiment, in an ideal case, the ink drop lands downward in the vertical direction shown by the dotted line in fig. 5, however, in an actual operation, the trajectory of the ink drop landing deviates, and the angle between the actual landing trajectory of the ink drop and the vertical dotted line in fig. 5 is the deviation angle. By using a detection device such as the camera system shown in fig. 5, a longitudinal detection image and a transverse detection image of the landing of the ink droplets of the print nozzle can be obtained by shooting respectively, and then the longitudinal offset angle and the transverse offset angle of the ink droplets of the print nozzle can be obtained by image recognition.
According to the ink drop offset correction method for the printing nozzles, the longitudinal offset angle and the transverse offset angle of the ink drops of each printing nozzle on the printing head can be identified and obtained through the respectively detected longitudinal detection image and transverse detection image of the ink drop landing of each printing nozzle on the printing head, the ink drop offset angle of each printing nozzle on the printing head can be accurately obtained, and the scheme is easy to realize.
In one embodiment, as shown in fig. 4, the determining a longitudinal offset distance of ink droplet landing of the printing nozzle according to the longitudinal offset angle and the determining a lateral offset distance of ink droplet landing of the printing nozzle according to the lateral offset angle at S220 includes:
s221, acquiring the distance between a printing nozzle and a printed substrate;
s222, determining the longitudinal maximum offset angle of the ink drop of the printing nozzle according to the longitudinal offset angle of the ink drop of each printing nozzle, and determining the longitudinal offset distance of the ink drop of the printing nozzle according to the distance and the longitudinal maximum offset angle;
s223, determining the transverse maximum offset angle of the ink drop of the printing nozzle according to the transverse offset angle of the ink drop of each printing nozzle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the distance and the transverse maximum offset angle.
According to the ink drop offset correction method for the printing nozzles, the maximum value in the longitudinal offset angles of the ink drops of all the printing nozzles is used as the longitudinal maximum offset angle, the maximum value in the transverse offset angles of the ink drops of all the printing nozzles is used as the transverse maximum offset angle, the longitudinal offset distance and the transverse offset distance of the ink drops of the printing nozzles are determined, the operation process can be effectively simplified, and the operation efficiency is improved.
Fig. 6 is a schematic diagram of the lateral offset distance of the drop landing of the ink drop from the printing nozzle in an embodiment, in which the printing nozzle on the inkjet printing head 62 on the ink filling element 61 drops the ink drop 63 toward the pixel pit 65 on the substrate below, the included angle 66 between the actual landing path of the ink drop 63 and the ideal vertical path is the lateral offset angle, and the difference 68 between the lateral offset of the actual landing position 67 and the ideal landing position 64 of the vertical landing of the ink drop 63 is the lateral offset distance of the drop landing. Thus, the lateral offset distance can be calculated from the detected lateral offset angle of ink drop landing of the print nozzle and the distance between the print nozzle and the substrate.
In one embodiment, the longitudinal offset distance of drop landing of the print nozzle of S222 is given by:
ΔX1＝S×tanαmax
in the above equation, Δ X1 is the offset distance of the print nozzle in the longitudinal direction, αmaxS is the distance between the print nozzle and the substrate to be printed, which is the maximum value of the longitudinal offset angle of each print nozzle.
In one embodiment, the lateral offset distance of drop landing of the print nozzle of S223 is given by:
ΔX2＝S×tanβmax
in the above equation, Δ X2 is the offset distance of the print nozzle in the lateral direction, βmaxS is the distance between the print nozzle and the substrate to be printed, which is the maximum value of the lateral offset angle of each print nozzle.
By the scheme, the longitudinal offset distance and the transverse offset distance for acquiring the ink drop landing of the printing nozzle can be simply and quickly calculated.
In one embodiment, as shown in fig. 4, the performing of the compensation correction on the landing positions of the ink droplets of the printing nozzles according to the longitudinal offset compensation value determined by the longitudinal offset distance and the lateral offset compensation value determined by the lateral offset distance in S230 includes:
231, before ink-jet printing is carried out on the substrate to be printed, setting offset compensation quantity of longitudinal ink drop dropping of the printing nozzle according to the longitudinal offset distance, setting offset compensation quantity of transverse ink drop dropping of the printing nozzle according to the transverse offset distance, and correcting the ink drop dropping position of the printing nozzle.
The offset compensation quantity is equivalent to the offset distance in value and is used for offsetting the influence of the offset distance, so that the actual dropping position of the ink drop of the printing nozzle is located at the ideal dropping position after the offset compensation quantity is compensated. For example, if the calculated lateral offset distance is Δ X, the system will set the drop offset compensation amount for the ink drops in the lateral direction to- Δ X in advance before the ink jet printing process.
The ink drop offset correction method of the printing nozzle comprises the steps of setting offset compensation amount of longitudinal ink drop dripping of the printing nozzle according to longitudinal offset distance before ink jet printing is carried out on a printed substrate, setting offset compensation amount of transverse ink drop dripping of the printing nozzle according to transverse offset distance, correcting the ink drop dripping position of the printing nozzle, and further offsetting the influence of the ink drop dripping offset of the printing nozzle.
It should be understood that although the steps in the flowcharts of fig. 2 and 4 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2 and 4 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 7, there is provided an ink drop offset correction apparatus of a printing nozzle, including: an offset angle detection module 710, an offset distance acquisition module 720, and an offset correction module 730, wherein:
an offset angle detecting module 710 for detecting an offset angle of the ink droplet of the print nozzle in the longitudinal direction and an offset angle of the ink droplet of the print nozzle in the transverse direction; wherein, the longitudinal direction is the moving direction of the printed substrate, and the transverse direction is the moving direction of the printing nozzle;
an offset distance obtaining module 720, configured to determine, according to the longitudinal offset angle and the lateral offset angle, an offset distance of the printing nozzle in the longitudinal direction and an offset distance in the lateral direction;
and an offset correction module 730, configured to perform compensation correction on the ink drop landing positions of the printing nozzles according to the longitudinal offset distance and the transverse offset distance.
The ink drop offset correction device for the printing nozzle comprises a printing substrate, wherein a printing nozzle is arranged on the printing substrate, and the printing nozzle is arranged on the printing substrate and comprises a plurality of ink drops, wherein the ink drops are arranged in a pixel pit.
In one embodiment, the offset angle detection module 710 includes:
the image acquisition module is used for acquiring longitudinal detection images and transverse detection images of ink drop landing of all printing nozzles on the printing head;
and the offset angle identification module is used for identifying the longitudinal offset angle of the ink drop of each printing nozzle in the longitudinal direction according to the longitudinal detection image and identifying the transverse offset angle of the ink drop of each printing nozzle in the transverse direction according to the transverse detection image.
In one embodiment, the offset distance obtaining module 720 includes:
the distance acquisition module is used for acquiring the distance between the printing nozzle and the printed substrate;
the longitudinal offset distance acquisition module is used for determining the longitudinal maximum offset angle of the ink drops of the printing nozzles according to the longitudinal offset angle of the ink drops of each printing nozzle, and determining the longitudinal offset distance of the ink drops of the printing nozzles according to the distance and the longitudinal maximum offset angle;
and the transverse offset distance acquisition module is used for determining the transverse maximum offset angle of the ink drop of the printing nozzle according to the transverse offset angle of the ink drop of each printing nozzle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the distance and the transverse maximum offset angle.
In one embodiment, the longitudinal offset distance acquisition module is further configured to derive the longitudinal offset distance of drop landing of ink drops of the print nozzle according to the following equation:
ΔX1＝S×tanαmax
in the above equation, Δ X1 is the offset distance of the print nozzle in the longitudinal direction, αmaxS is the distance between the print nozzle and the substrate to be printed, which is the maximum value of the longitudinal offset angle of each print nozzle.
In one embodiment, the lateral offset distance acquisition module is further configured to derive the lateral offset distance of drop landing of ink drops of the print nozzle according to:
ΔX2＝S×tanβmax
in the above equation, Δ X2 is the offset distance of the print nozzle in the lateral direction, βmaxS is the distance between the print nozzle and the substrate to be printed, which is the maximum value of the lateral offset angle of each print nozzle.
In one embodiment, the offset correction module 730 is further configured to, before performing inkjet printing on the printed substrate, set an offset compensation amount for longitudinal ink drop landing of the print nozzle according to the longitudinal offset distance, and set an offset compensation amount for lateral ink drop landing of the print nozzle according to the lateral offset distance, so as to correct the ink drop landing position of the print nozzle.
For specific definition of the drop offset correction means for the print nozzles, reference is made to the above definition of the drop offset correction method for the print nozzles, which is not described in detail here. The various modules of the drop deflection correction apparatus for a print nozzle described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
The ink drop offset correction device for a print nozzle of the present invention corresponds to the ink drop offset correction method for a print nozzle of the present invention, and the technical features and advantages thereof described in the above embodiments of the ink drop offset correction method for a print nozzle are applicable to the embodiments of the ink drop offset correction device for a print nozzle, and are thus stated.
The present invention also provides a drop placement correction system for a print nozzle, as shown in fig. 1, comprising: a detection device 110 and a processor 120 connected to the detection device; the detecting device 110 is used for detecting and acquiring an image of the drop 21 of the printing nozzle 20;
the processor is configured to perform the steps of the method of drop offset correction of a print nozzle as in any of the embodiments above.
The detecting device 110 may be a camera or other image sensor.
Before the ink jet printing process, the detection device 110 detects and acquires an image of the drop 21 of the ink drop of the printing nozzle 20 and transmits the image to the processor 120, the processor 120 analyzes and acquires the longitudinal offset angle and the transverse offset angle of the drop of the ink drop of the printing nozzle, calculates and acquires the corresponding longitudinal offset distance and the corresponding transverse offset distance, performs compensation and correction on the longitudinal offset distance and the transverse offset distance of the ink drop, and performs the ink jet printing process after the compensation and correction on the offset of the ink drop in the moving direction of the printing nozzle and the moving direction of the printed substrate are realized. Therefore, the abnormal situation that the ink drop drops outside the pixel pit due to the deviation of the ink drop dropping position of the printing nozzle in the use process of the ink jet printing head can be avoided, and the printing accuracy of the printing nozzle 20 is improved.
In one embodiment, the processor is a computer 9.
In one embodiment, as shown in fig. 8 and 9, the detecting device includes a first camera 5 and a second camera 7;
the first camera 5 faces the printing nozzle in the transverse direction and is used for shooting a longitudinal detection image of ink drop of the printing nozzle; the second camera 7 faces the print nozzle in the longitudinal direction and is used for shooting a transverse detection image of ink drop of the print nozzle.
According to the ink drop offset correction system for the printing nozzle, the longitudinal and transverse detection images can be shot by the two groups of cameras respectively, and the scheme is easy to realize.
Further, in an embodiment, as shown in fig. 8 and 9, the detecting device further includes a first light source 4 and a second light source 6; the first light source 4 faces the printing nozzle in the transverse direction, is opposite to the first camera 5, and is used for emitting illumination to the printing nozzle when the first camera 5 shoots a longitudinal detection image of the ink drop landing of the ink drop of the printing nozzle; the second light source 6 faces the print nozzle in the longitudinal direction, is opposite to the second camera 7, and is configured to emit light to the print nozzle when the second camera 7 captures a transverse detection image of ink droplet landing of the print nozzle.
Above-mentioned print nozzle's ink droplet skew correction system, when the image is listened to in the ink droplet drippage of print nozzle ink droplet is shot to the camera, to print nozzle launch illumination, can promote the effect that print nozzle shot the image, promote then and listen the accuracy of the vertical skew angle and the horizontal skew angle of the ink droplet drippage of print nozzle who acquires. And the system can operate without depending on external light source conditions, and the use adaptability of the system is improved.
In one embodiment, as shown in fig. 8 and 9, the drop offset correction system for a print nozzle of an embodiment of the present invention further includes an ink titration reservoir 8 disposed below the print nozzle for receiving ink drops dropped by the print nozzle.
Above-mentioned printing nozzle's ink droplet skew correction system connects the ink droplet that printing nozzle drips greatly through ink titration cell 8, can avoid printing nozzle dripping the ink droplet to cause the pollution to the environment.
Combining the above-described drop offset correction systems for print nozzles of various embodiments, as shown in fig. 8, in one embodiment, the drop offset correction system for print nozzles includes an Ink fill member 1(Ink stack), an inkjet print head 2(Printhead), and the inkjet print head 2 has a number of nozzles. The nozzle may drop ink droplets 3. The first light source 4 and the first camera 5 detect the offset angle of the ink droplet in the longitudinal direction. The second light source 6 and the second camera 7 detect the offset angle of the ink droplets in the lateral direction. An ink titration tank 8 is arranged below the ink jet printing head 2. The first light source 4, the first camera 5, the second light source 6 and the second camera 7 are all connected with a computer 9.
To further illustrate the structure of the drop titration correction system in the above embodiment, a schematic top view of the drop titration correction system is illustrated in fig. 9: the first light source 4 and the first camera 5 are oppositely disposed at two sides of the inkjet printing head 2, and detect the offset angle of the ink droplet in the longitudinal direction. The second light source 6 and the second camera 7 are oppositely disposed at two sides of the inkjet printhead 2, and detect a deviation angle of the ink droplet in a transverse direction.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 10. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of drop offset correction for a print nozzle. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 10 is merely a block diagram of some of the structures associated with the inventive arrangements and is not intended to limit the computing devices to which the inventive arrangements may be applied, as a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
detecting a longitudinal offset angle and a transverse offset angle of ink drop landing of a printing nozzle; wherein, the longitudinal direction is the moving direction of the printed substrate, and the transverse direction is the moving direction of the printing nozzle;
determining the longitudinal offset distance of the ink drop of the printing nozzle according to the longitudinal offset angle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the transverse offset angle;
and performing compensation correction on the ink drop landing positions of the printing nozzles according to the longitudinal offset compensation amount determined by the longitudinal offset distance and the transverse offset compensation amount determined by the transverse offset distance.
When the processor of the computer equipment executes a program, the steps are realized, so that the corresponding longitudinal offset distance and the corresponding transverse offset distance can be calculated and obtained by detecting the longitudinal offset angle and the transverse offset angle of the ink drop of the printing nozzle before the ink jet printing is carried out on the printed substrate, and the compensation correction is carried out on the longitudinal offset distance and the transverse offset distance of the ink drop, so that the condition that the ink drop of the printing nozzle drops out of a pixel pit due to the offset of the ink drop dropping position in the use process of the ink jet printing head can be avoided, and the printing accuracy of the printing nozzle is improved.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring longitudinal detection images and transverse detection images of ink drop landing of all printing nozzles on a printing head;
and identifying the longitudinal offset angle of the ink drop of each printing nozzle in the longitudinal direction according to the longitudinal detection image, and identifying the transverse offset angle of the ink drop of each printing nozzle in the transverse direction according to the transverse detection image.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring the distance between a printing nozzle and a printed substrate;
determining the longitudinal maximum offset angle of the ink drops of the printing nozzles according to the longitudinal offset angle of the ink drops of each printing nozzle, and determining the longitudinal offset distance of the ink drops of the printing nozzles according to the distance and the longitudinal maximum offset angle;
and determining the transverse maximum offset angle of the ink drop of the printing nozzle according to the transverse offset angle of the ink drop of each printing nozzle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the distance and the transverse maximum offset angle.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
the longitudinal offset distance by which drops of ink from the print nozzle land is given by:
ΔX1＝S×tanαmax
in the above equation, Δ X1 is the offset distance of the print nozzle in the longitudinal direction, αmaxS is the distance between the print nozzle and the substrate to be printed, which is the maximum value of the longitudinal offset angle of each print nozzle.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
the lateral offset distance by which an ink drop from a print nozzle lands is given by:
ΔX2＝S×tanβmax
in the above equation, Δ X2 is the offset distance of the print nozzle in the lateral direction, βmaxS is the distance between the print nozzle and the substrate to be printed, which is the maximum value of the lateral offset angle of each print nozzle.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
before ink-jet printing is carried out on a printed substrate, setting offset compensation amount of longitudinal ink drop dropping of a printing nozzle according to a longitudinal offset distance, setting offset compensation amount of transverse ink drop dropping of the printing nozzle according to a transverse offset distance, and correcting the ink drop dropping position of the printing nozzle.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
detecting a longitudinal offset angle and a transverse offset angle of ink drop landing of a printing nozzle; wherein, the longitudinal direction is the moving direction of the printed substrate, and the transverse direction is the moving direction of the printing nozzle;
determining the longitudinal offset distance of the ink drop of the printing nozzle according to the longitudinal offset angle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the transverse offset angle;
and performing compensation correction on the ink drop landing positions of the printing nozzles according to the longitudinal offset compensation amount determined by the longitudinal offset distance and the transverse offset compensation amount determined by the transverse offset distance.
The computer readable storage medium and the stored computer program realize the steps, so that before the ink jet printing is performed on the printed substrate, the corresponding longitudinal offset distance and the corresponding transverse offset distance are calculated and obtained by detecting the longitudinal offset angle and the transverse offset angle of the ink drop of the printing nozzle, and the compensation correction is performed on the longitudinal offset distance and the transverse offset distance of the ink drop, so that the condition that the ink drop of the printing nozzle drops outside the pixel pit due to the offset of the ink drop dropping position in the use process of the ink jet printing head can be avoided, and the printing accuracy of the printing nozzle is improved.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring longitudinal detection images and transverse detection images of ink drop landing of all printing nozzles on a printing head;
and identifying the longitudinal offset angle of the ink drop of each printing nozzle in the longitudinal direction according to the longitudinal detection image, and identifying the transverse offset angle of the ink drop of each printing nozzle in the transverse direction according to the transverse detection image.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring the distance between a printing nozzle and a printed substrate;
determining the longitudinal maximum offset angle of the ink drops of the printing nozzles according to the longitudinal offset angle of the ink drops of each printing nozzle, and determining the longitudinal offset distance of the ink drops of the printing nozzles according to the distance and the longitudinal maximum offset angle;
and determining the transverse maximum offset angle of the ink drop of the printing nozzle according to the transverse offset angle of the ink drop of each printing nozzle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the distance and the transverse maximum offset angle.
In one embodiment, the computer program when executed by the processor further performs the steps of:
the longitudinal offset distance by which drops of ink from the print nozzle land is given by:
ΔX1＝S×tanαmax
in the above equation, Δ X1 is the offset distance of the print nozzle in the longitudinal direction, αmaxS is the distance between the print nozzle and the substrate to be printed, which is the maximum value of the longitudinal offset angle of each print nozzle.
In one embodiment, the computer program when executed by the processor further performs the steps of:
the lateral offset distance by which an ink drop from a print nozzle lands is given by:
ΔX2＝S×tanβmax
in the above equation, Δ X2 is the offset distance of the print nozzle in the lateral direction, βmaxS is the distance between the print nozzle and the substrate to be printed, which is the maximum value of the lateral offset angle of each print nozzle.
In one embodiment, the computer program when executed by the processor further performs the steps of:
before ink-jet printing is carried out on a printed substrate, setting offset compensation amount of longitudinal ink drop dropping of a printing nozzle according to a longitudinal offset distance, setting offset compensation amount of transverse ink drop dropping of the printing nozzle according to a transverse offset distance, and correcting the ink drop dropping position of the printing nozzle.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile 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 (Synchlink), DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A method of drop placement correction for a print nozzle, the method comprising:
detecting a longitudinal offset angle and a transverse offset angle of ink drop landing of a printing nozzle; wherein, the longitudinal direction is the moving direction of the printed substrate, and the transverse direction is the moving direction of the printing nozzle; the longitudinal offset angle is a component of an included angle between an ink drop landing track and the vertical direction in the longitudinal direction; the transverse offset angle is a component of an included angle between an ink drop landing track and the vertical direction in the transverse direction; the vertical direction represents a direction perpendicular to a plane of the printed substrate;
determining the longitudinal offset distance of the ink drop of the printing nozzle according to the longitudinal offset angle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the transverse offset angle;
and performing compensation correction on the ink drop landing positions of the printing nozzles according to the longitudinal offset compensation amount determined by the longitudinal offset distance and the transverse offset compensation amount determined by the transverse offset distance.
2. The method of claim 1, wherein detecting the vertical offset angle and the horizontal offset angle of the landing of the ink drop on the print nozzle comprises:
acquiring longitudinal detection images and transverse detection images of ink drop landing of all printing nozzles on a printing head;
and identifying the longitudinal offset angle of the ink drop of each printing nozzle in the longitudinal direction according to the longitudinal detection image, and identifying the transverse offset angle of the ink drop of each printing nozzle in the transverse direction according to the transverse detection image.
3. A method of drop placement correction for a print nozzle as claimed in claim 1, wherein said determining a longitudinal placement distance for drop landing for the print nozzle from said longitudinal placement angle and determining a lateral placement distance for drop landing for the print nozzle from said lateral placement angle comprises:
acquiring the distance between a printing nozzle and a printed substrate;
determining the longitudinal maximum offset angle of the ink drops of the printing nozzles according to the longitudinal offset angle of the ink drops of each printing nozzle, and determining the longitudinal offset distance of the ink drops of the printing nozzles according to the distance and the longitudinal maximum offset angle;
and determining the transverse maximum offset angle of the ink drop of the printing nozzle according to the transverse offset angle of the ink drop of each printing nozzle, and determining the transverse offset distance of the ink drop of the printing nozzle according to the distance and the transverse maximum offset angle.
4. A method of drop placement correction for a print nozzle as claimed in claim 3, wherein the longitudinal and lateral placement of drops from the print nozzle is given by:
ΔX1＝S×tanαmax
ΔX2＝S×tanβmax
in the above equation, Δ X1 is the offset distance of the printing nozzle in the longitudinal direction, Δ X2 is the offset distance of the printing nozzle in the lateral direction, αmaxMaximum value of the longitudinal offset angle of each print nozzle, βmaxIs the maximum value of the lateral deviation angle of each printing nozzle, and S is the printing nozzle and the printed substrateThe distance between them.
5. The method of any of claims 1 to 4, wherein the offset correction of the landing position of the ink drop of the print nozzle according to the longitudinal offset compensation value determined by the longitudinal offset distance and the lateral offset compensation value determined by the lateral offset distance comprises:
before ink-jet printing is carried out on a printed substrate, setting offset compensation amount of longitudinal ink drop dropping of a printing nozzle according to a longitudinal offset distance, setting offset compensation amount of transverse ink drop dropping of the printing nozzle according to a transverse offset distance, and correcting the ink drop dropping position of the printing nozzle.
6. An ink drop deflection correction apparatus for a print nozzle, said apparatus comprising:
the offset angle detection module is used for detecting the offset angle of the ink drop of the printing nozzle in the longitudinal direction and the offset angle in the transverse direction; wherein, the longitudinal direction is the moving direction of the printed substrate, and the transverse direction is the moving direction of the printing nozzle; the longitudinal offset angle is a component of an included angle between an ink drop landing track and the vertical direction in the longitudinal direction; the transverse offset angle is a component of an included angle between an ink drop landing track and the vertical direction in the transverse direction; the vertical direction represents a direction perpendicular to a plane of the printed substrate;
the offset distance acquisition module is used for determining the offset distance of the printing nozzle in the longitudinal direction and the offset distance in the transverse direction according to the longitudinal offset angle and the transverse offset angle;
and the offset correction module is used for performing compensation correction on the ink drop landing positions of the printing nozzles according to the longitudinal offset distance and the transverse offset distance.
7. A drop deflection correction system for a print nozzle, said system comprising: the device comprises a detection device and a processor connected with the detection device;
the detection device is used for detecting and acquiring an image of the drop of the ink droplet of the printing nozzle;
the processor is adapted to perform the steps of a method of drop offset correction of a print nozzle according to any of claims 1 to 5.
8. The system of claim 7, wherein the detecting means comprises a first camera and a second camera;
the first camera faces the printing nozzle in the transverse direction and is used for shooting a longitudinal detection image of ink drop dropping of the printing nozzle;
the second camera faces the printing nozzle in the longitudinal direction and is used for shooting a transverse detection image of ink drop dropping of the printing nozzle.
9. The system of claim 8, wherein the detecting means further comprises a first light source and a second light source;
the first light source faces the printing nozzle in the transverse direction, is opposite to the first camera and is used for emitting illumination to the printing nozzle when the first camera shoots a longitudinal detection image of ink drop landing of ink drops of the printing nozzle;
the second light source faces the printing nozzle in the longitudinal direction, is opposite to the second camera and is used for emitting illumination to the printing nozzle when the second camera shoots a transverse detection image of ink drop dripping of the printing nozzle.
10. A drop placement correction system for a print nozzle as claimed in any one of claims 7 to 9, further comprising an ink titration cell disposed beneath said print nozzle for receiving drops of ink dropped by the print nozzle.
11. 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 when executing the computer program implements the steps of a method of drop offset correction of a print nozzle according to any of claims 1 to 5.
12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for drop offset correction of a print nozzle according to any one of claims 1 to 5.
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| CN113752698B (en) * | 2021-08-31 | 2022-07-12 | 华中科技大学 | Ink drop point precision control method and system for ink jet printing |
| CN114536975B (en) * | 2022-02-28 | 2023-03-28 | 华中科技大学 | Method and device for detecting positioning precision of ink drop point in ink-jet printing |
| CN114683731B (en) * | 2022-03-03 | 2023-07-25 | 深圳市华星光电半导体显示技术有限公司 | Printing method, printing system and printing device |
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