A deflection electrode for inkjet device and inkjet device

Abstract

The present invention relates to a deflection electrode of a coding device and a coding device, wherein the deflection electrode of the coding device comprises: a first polarity electrode plate assembly and a second polarity electrode plate assembly; the first polarity electrode plate assembly and the second polarity electrode plate assembly are arranged opposite to each other, the surface of the first polarity electrode plate assembly opposite to the second polarity electrode plate assembly is the first surface, the surface of the second polarity electrode plate assembly opposite to the first polarity electrode plate assembly is the second surface, and the area between the first surface of the first polarity electrode plate assembly and the second surface of the second polarity electrode plate assembly can form a deflection electric field of the deflection electrode of the coding device; wherein the first polarity electrode plate assembly comprises m first polarity electrode plates electrically insulated from each other arranged in a controllable deflection direction of the deflection electric field, and m is a natural number greater than or equal to 2. The present invention controls the deflection direction of the deflection electric field by controlling the voltage applied to each electrode plate, without any mechanical manipulation of the electrode plate.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial inkjet coding, and in particular relates to a deflection electrode of an inkjet coding device and an inkjet coding device. Background Art

[0002] The inkjet printer is a computer-controlled, non-contact inkjet printer that prints on products. Figure 1 , Figure 1 The inkjet device shown includes a print head, which includes a nozzle 1, a charging tank 2, a deflection electrode and a recovery pipe 6. The deflection electrode includes a negative deflection electrode plate 4 and a positive deflection electrode plate 5. The nozzle 1 is used to spray continuous and uniform ink droplets 3 at a certain pressure; the negative deflection electrode plate 4 has an opposite potential to the positive deflection electrode plate 5 (if the potential of the negative deflection electrode plate 4 is -v, then the potential of the positive deflection electrode plate 5 is +v), and a deflection electric field is formed in the area between the negative deflection electrode plate 4 and the positive deflection electrode plate 5. When the inkjet device performs printing, under the control of the computer, the nozzle 1 sprays out continuous and uniform ink droplets 3 at a certain pressure. The ink droplets 3 fly at a certain speed and first pass through the charging slot 2. When passing through the charging slot 2, the ink droplets 3 are charged or not charged under the control of the computer; after passing through the charging slot 2, the ink droplets 3 continue to fly and pass through the deflection electric field formed by the negative deflection electrode plate 4 and the positive deflection electrode plate 5. When the charged ink droplets 3 fly through the deflection electric field formed by the negative deflection electrode plate 4 and the positive deflection electrode plate 5, the flight trajectory will be deflected and fall on the surface of the substrate 7 passing by at a certain moving speed under the nozzle (the substrate 7 can move back and forth in the positive / reverse direction), and the charged ink droplets 3 have different deflection degrees due to the different amounts of electricity they carry, so that they can fall on the corresponding positions on the surface of the substrate 7 to form a specific pattern, for example Figure 2 The capital letter E shown; when the uncharged ink droplets 3 fly through the deflection electric field formed by the negative deflection electrode plate 4 and the positive deflection electrode plate 5, the flight trajectory will not be deflected, and the uncharged ink droplets 3 will fall into the recovery tube 6 arranged directly below the nozzle 1 and above the substrate 7, and will be recovered by the recovery tube 6, and will not fall on the surface of the substrate 7.

[0003] When the inkjet printer performs printing, the computer uses the object to be printed as a sample and controls the inkjet printer to print each printing point on the substrate 7 in the order of columns according to the moving direction of the substrate 7, thereby printing a pattern corresponding to the object to be printed. Figure 2As shown, the object to be printed is a capital letter E. The figure shows that the printing points of the pattern corresponding to the object to be printed include 4 columns and 5 rows, totaling 14 printing points. If viewed from right to left and from top to bottom, the first column has a total of 3 printing points in the 1st row, the 3rd row and the 5th row, the second column has a total of 3 printing points in the 1st row, the 3rd row and the 5th row, the third column has a total of 3 printing points in the 1st row, the 3rd row and the 5th row, and the fourth column has a total of 5 printing points in the 1st row, the 2nd row, the 3rd row, the 4th row and the 5th row. Then, during printing, under the control of the computer, the ink droplets 3 corresponding to the first column in the 1st row, the 3rd row and the 5th row are charged when passing through the charging slot 2, and the ink droplets 3 corresponding to the 2nd row and the 4th row are not charged when passing through the charging slot, and so on, thereby printing a pattern corresponding to the capital letter E on the substrate 7. When the moving direction of the printing material 7 is to the right, the printing order of the inkjet coding device is: first print each printing dot in the first column, then print each printing dot in the second column, and then print each printing dot in the third column and each printing dot in the fourth column in sequence; and in the same column, first print the printing dots in the first row, then print the printing dots in the second row, and then print the printing dots in the third row, the printing dots in the fourth row and the printing dots in the fifth row in sequence. Figure 2 The expected printing effect of the capital letter E is shown.

[0004] Refer to Figure 1 During the inkjet printing process, the substrate can move in one direction from left to right or from right to left, or it can move back and forth from left to right. Figure 1 In the example, the substrate 7 moves rightward. Since the substrate 7 moves rightward at a speed, in the same column of ink droplets 3, the ink droplets 3 printed later will fall on the left side of the ink droplets 3 printed earlier. In this way, the pattern obtained by printing is different from the expected printing effect (such as Figure 2 As shown in the figure, a certain degree of deformation will occur, such as Figure 3 As shown, the faster the substrate 7 moves, the more serious the deformation. Similarly, when the substrate 7 moves to the left, since the substrate 7 has a leftward movement speed, in the same column of ink droplets, the ink droplets 3 printed later will fall on the right side of the ink droplets 3 printed earlier, and the pattern obtained by printing will also produce a certain degree of deformation relative to the expected printing effect. In the case of printing with reciprocating motion of the substrate, in order to reduce the degree of deformation of the printing effect, the reciprocating (i.e. rightward / leftward) movement speed of the substrate 7 can only be reduced as much as possible, for example, the reciprocating movement speed of the substrate 7 is reduced to the point where the deformation of the pattern obtained by printing is small enough to be acceptable, and reducing the speed of the substrate movement will seriously limit production efficiency. Summary of the invention

[0005] In order to solve the technical problem that the printed pattern is deformed due to the change in the moving speed or direction of the substrate, an embodiment of the present invention proposes a deflection electrode of a coding device and a coding device.

[0006] In one aspect of an embodiment of the present invention, a deflection electrode of a coding device is provided, comprising:

[0007] A first polarity electrode plate assembly and a second polarity electrode plate assembly, wherein the first polarity and the second polarity are opposite to each other;

[0008] The first polarity electrode plate assembly and the second polarity electrode plate assembly are arranged opposite to each other, the surface of the first polarity electrode plate assembly opposite to the second polarity electrode plate assembly is the first surface, the surface of the second polarity electrode plate assembly opposite to the first polarity electrode plate assembly is the second surface, and the area between the first surface of the first polarity electrode plate assembly and the second surface of the second polarity electrode plate assembly can form a deflection electric field of the deflection electrode of the inkjet device;

[0009] Among them, the first polarity electrode plate assembly includes m first polarity electrode plates electrically insulated from each other and arranged in a manner that the deflection direction of the deflection electric field is controllable, and m is a natural number greater than or equal to 2; when voltages of corresponding electrical polarities are respectively applied to the m first polarity electrode plates and the second polarity electrode plate assembly, an electric field for each first polarity electrode plate is formed in the area between the first surface of each first polarity electrode plate in the m first polarity electrode plates and the second surface of the second polarity electrode plate assembly, and all electric fields for each first polarity electrode plate are superimposed to form the deflection electric field of the deflection electrode of the inkjet device.

[0010] In some embodiments, the deflection direction of the deflection electric field is controllable, including: controlling the deflection direction of the deflection electric field by adjusting the voltage applied to the m first polarity electrode plates;

[0011] The adjusting the voltage applied to the m first polarity electrode plates includes: adjusting the voltage applied to one first polarity electrode plate among the m first polarity electrode plates, or adjusting the voltage applied to multiple first polarity electrode plates among the m first polarity electrode plates.

[0012] In some embodiments, the m first polarity electrode plates are arranged side by side along the moving direction of the substrate, and / or the first polarity electrode plate assembly and the second polarity electrode plate assembly are arranged parallel to each other.

[0013] In certain embodiments, m is 2, 3, or 4.

[0014] In some embodiments, the second polarity electrode plate assembly includes a second polarity electrode plate; or,

[0015] The second polarity electrode plate assembly includes n second polarity electrode plates electrically insulated from each other, where n is a natural number greater than or equal to 2.

[0016] In some embodiments, m is 2, the first polarity electrode plate assembly includes a first negative electrode plate and a second negative electrode plate, the second polarity electrode plate assembly includes a first positive electrode plate, a first positive voltage is applied to the first positive electrode plate, a first negative voltage is applied to the first negative electrode plate, and a second negative voltage is applied to the second negative electrode plate, wherein a first electric field is formed between the first surface of the first negative electrode plate and the second surface of the first positive electrode plate, a second electric field is formed between the first surface of the second negative electrode plate and the second surface of the first positive electrode plate, and the first electric field and the second electric field are superimposed to form a deflection electric field of the deflection electrode of the inkjet device; in response to the adjustment of the first negative voltage applied to the first negative electrode plate or the second negative voltage applied to the second negative electrode plate, the deflection direction of the deflection electric field is controlled;

[0017] or,

[0018] m is 2, the first polarity electrode plate assembly includes a first positive electrode plate and a second positive electrode plate, the second polarity electrode plate assembly includes a first negative electrode plate, a first negative voltage is applied to the first negative electrode plate, a first positive voltage is applied to the first positive electrode plate, and a second positive voltage is applied to the second positive electrode plate, wherein a first electric field is formed between the first surface of the first positive electrode plate and the second surface of the first negative electrode plate, a second electric field is formed between the first surface of the second positive electrode plate and the second surface of the first negative electrode plate, and the first electric field and the second electric field are superimposed to form a deflection electric field of the deflection electrode of the inkjet device; in response to the adjustment of the first positive voltage applied to the first positive electrode plate or the second positive voltage applied to the second positive electrode plate, the deflection direction of the deflection electric field is controlled.

[0019] In some embodiments, the adjusting the voltage applied to the m first polarity electrode plates includes: adjusting the voltage applied to the m first polarity electrode plates based on a moving speed of the substrate acquired in real time.

[0020] In another aspect of an embodiment of the present invention, a coding device is proposed, including a nozzle, a speed sensor and a processor, the nozzle including a deflection electrode of the coding device as described in any of the preceding items, the first polarity electrode plate assembly and the second polarity electrode plate assembly are arranged relative to each other, the speed sensor is used to obtain in real time the moving speed of the substrate under the nozzle, and the m first polarity electrode plates are arranged along the moving direction of the substrate when the coding device is working. The processor calculates in real time the deflection direction that needs to be compensated for the deflection electric field based on the moving speed of the substrate obtained in real time; calculates the potential difference value based on the deflection direction that needs to be compensated for the deflection electric field calculated in real time; and adjusts the voltage applied to the m first polarity electrode plates based on the calculated potential difference value.

[0021] In some embodiments, the speed sensor includes an axis encoder, and real-time data of the moving speed of the printing material is obtained through the axis encoder.

[0022] In some embodiments, the nozzle also includes a nozzle, a charging tank and a recovery pipe. The charging tank is located below the nozzle and is used to charge at least part of the ink droplets ejected from the nozzle under the control of a computer; the deflection electrode of the inkjet device is located below the charging tank, and a voltage is applied to the first polarity electrode plate assembly and the second polarity electrode plate assembly, so that a deflection electric field is formed in the area between the first surface of the first polarity electrode plate assembly and the second surface of the second polarity electrode plate assembly to cause the flight trajectory of the charged ink droplets to be deflected, and when the deflection direction of the deflection electric field needs to be compensated, the voltage applied to the m first polarity electrode plates is adjusted based on the moving speed of the substrate obtained in real time; the recovery tank is located below the deflection electric field and is used to recover uncharged ink droplets.

[0023] Beneficial effects of the present invention: The deflection electrode of the inkjet device and the inkjet device proposed in the embodiment of the present invention change the existing combination mode of the deflection electrode composed of a positive electrode plate and a negative electrode plate, by replacing one of the electrode plates with two or more electrode plates that do not change the electrical polarity, or by replacing the two electrode plates with two or more electrode plates that do not change the electrical polarity, and then the deflection direction of the deflection electric field can be controlled by controlling the voltage applied to each electrode plate, without any mechanical manipulation of the electrode plate, wherein only the direction of the electric field is deflected, not the electrode plate itself, by controlling the deflection direction of the deflection electric field can not only overcome the deformation of the printing pattern caused by different moving speeds of the substrate, but also overcome the deformation of the printing pattern caused by the forward and reverse directions (or back and forth or reciprocating) of the substrate, and further, for the occasion of multiple nozzles cooperating in printing, by controlling the deflection electric field direction of each nozzle, the above-mentioned technical effect of overcoming deformation can also be achieved. In addition, the deflection electrode of the inkjet device and the inkjet device proposed in the embodiment of the present invention can automatically control the direction of the electric field in real time. Furthermore, the deflection electrode of the inkjet device and the inkjet device proposed in the embodiment of the present invention adjust the direction of the deflection electric field in real time based on the different moving speeds of the substrate. Even if the moving speed of the substrate changes significantly or the moving direction is opposite, the printed pattern will not be obviously deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structural schematic diagram of the existing inkjet printer is shown;

[0025] Figure 2 A schematic diagram showing the expected printing effect of a capital letter E printed by an existing inkjet printer;

[0026] Figure 3 A schematic diagram showing the actual printing effect of the capital letter E printed by the existing inkjet coding device;

[0027] Figure 4a , Figure 4band Figure 4c Schematic diagrams showing the printing effect at different moving speeds of the substrate;

[0028] Figure 5 A schematic diagram showing the electric field generated by the deflection electrode of a conventional inkjet device;

[0029] Figure 6 A schematic structural diagram showing that in the inkjet device proposed in an embodiment of the present invention, when the first polarity electrode plate assembly of the deflection electrode includes two first polarity electrode plates and the second polarity electrode plate assembly includes one second polarity electrode plate, two first polarity electrode plates are arranged along the moving direction of the substrate;

[0030] Figure 7a A schematic diagram showing a first electric field generated when a voltage is applied to the first first polarity electrode plate of the deflection electrode of the inkjet device proposed in an embodiment of the present invention, in the case where the first polarity electrode plate assembly includes two first polarity electrode plates and the second polarity electrode plate assembly includes one second polarity electrode plate;

[0031] Figure 7b A schematic diagram showing that, in the case where the first polarity electrode plate assembly includes two first polarity electrode plates and the second polarity electrode plate assembly includes one second polarity electrode plate, a second electric field is generated when a voltage is applied to the second first polarity electrode plate in the deflection electrode of the inkjet device proposed in an embodiment of the present invention;

[0032] Figure 8 A schematic diagram showing the direction of the deflection electric field when the first polarity electrode plate assembly includes two first polarity electrode plates and the second polarity electrode plate assembly includes one second polarity electrode plate, and the strength of the first electric field is equal to the strength of the second electric field;

[0033] Fig. 9 A schematic diagram showing the direction of the deflection electric field of the deflection electrode of the inkjet device proposed in an embodiment of the present invention when the first polarity electrode plate assembly includes two first polarity electrode plates and the second polarity electrode plate assembly includes one second polarity electrode plate, and when the intensity of the first electric field is stronger than the intensity of the second electric field;

[0034] Fig.10 A schematic diagram showing the direction of the deflection electric field of the deflection electrode of the inkjet device proposed in an embodiment of the present invention when the first polarity electrode plate assembly includes two first polarity electrode plates and the second polarity electrode plate assembly includes one second polarity electrode plate, and the intensity of the second electric field is stronger than the intensity of the first electric field;

[0035] Fig.11a , Fig.11b , Fig.11c and Fig.11dSchematic diagrams of the electric fields of the deflection electrodes of the inkjet device for automatically controlling the deflection angle in real time provided by the embodiments of the present invention are respectively shown in the case where the first polarity electrode plate assembly includes two first polarity electrode plates and the second polarity electrode plate assembly includes two second polarity electrode plates;

[0036] Fig.12a , Figure 12b and Fig.12c Schematic diagrams of the electric fields of the deflection electrodes of the inkjet device for real-time automatic control of the deflection angle proposed in the embodiments of the present invention are respectively shown when the first polarity electrode plate assembly includes three first polarity electrode plates and the second polarity electrode plate assembly includes one second polarity electrode plate. DETAILED DESCRIPTION

[0037] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. However, those skilled in the art will appreciate that the present invention is not limited to the accompanying drawings and the following embodiments.

[0038] As described herein, the term "including" and its various variations may be understood as open terms, which mean "including but not limited to". The term "one embodiment" and similar expressions may be understood as "at least one embodiment". The term "another embodiment" and similar expressions may be understood as "at least one other embodiment". The term "based on" and similar expressions may be understood as "at least based on". The terms "first", "second", "third", etc. are only used to distinguish different features and have no substantial meaning. The terms "left", "right", "middle" and similar expressions are only used to indicate the positional relationship between relative objects.

[0039] As mentioned above, when the inkjet printer is printing, the moving speed of the substrate will cause the printed pattern to deform. In order to prevent the deformation of the printed pattern caused by the moving speed of the substrate, the applicant found that the negative deflection electrode plate and the positive deflection electrode plate can be mechanically moved according to the rated speed of the substrate, so that the direction of the deflection electric field formed by the negative deflection electrode plate and the positive deflection electrode plate changes, thereby presetting the angle between the deflection electric field direction and the moving direction of the substrate to a specific angle, which can reduce the degree of deformation of the pattern obtained by printing. The applicant further discovered in the experiment that when there is a large deviation between the moving speed of the substrate and the rated speed, the deformation of the printed pattern will still be very obvious. Specifically, when the moving speed of the substrate is less than the rated speed and there is a large deviation, in the same column of ink droplets, the later printed ink droplets will fall on the side of the first printed ink droplets that is the same as the moving direction of the substrate, resulting in obvious deformation of the printed pattern; when the moving speed of the substrate is greater than the rated speed and there is a large deviation, in the same column of ink droplets, the later printed ink droplets will fall on the side of the first printed ink droplets that is opposite to the moving direction of the substrate, resulting in obvious deformation of the printed pattern. Figure 4a to Figure 4c An example of the above situation is given. For example, when the substrate moves to the right, if the substrate's moving speed does not deviate significantly from the rated speed, the printed pattern will not be deformed, or the printed pattern will not be deformed significantly. Figure 4a As shown in the figure; when the moving speed of the substrate is less than the rated speed and there is a large deviation, in the same column of ink droplets, the ink droplets printed later will fall on the right side of the ink droplets printed earlier, resulting in obvious deformation of the printed pattern, such as Figure 4b As shown in the figure; when the moving speed of the substrate is greater than the rated speed and there is a large deviation, in the same column of ink droplets, the ink droplets printed later will fall on the left side of the ink droplets printed earlier, resulting in obvious deformation of the printed pattern, such as Figure 4c As shown. It can be seen that the negative deflection electrode plate and the positive deflection electrode plate are mechanically adjusted according to the rated speed of the substrate so that the direction of the deflection electric field formed by the negative deflection electrode plate and the positive deflection electrode plate changes. When there is no large deviation between the moving speed of the substrate and the rated speed, the printed pattern will not be deformed or the deformation is not obvious. However, when there is a large deviation between the moving speed of the substrate and the rated speed, the printed pattern will be obviously deformed. In order to solve the above technical problems, the applicant analyzed the deflection electrode plates of the inkjet device and found that the deflection electrode plates of the conventional inkjet device are composed of a positive electrode plate and a negative electrode plate. The electric field formed by the deflection electrode cannot be controlled in direction by changing the voltage on the electrode.

[0040] In order to solve the technical problem that the printed pattern will be obviously deformed when the moving speed of the substrate changes greatly or the moving direction is opposite, the embodiment of the present invention proposes a deflection electrode of a coding device and a coding device. By automatically controlling the electric field direction of the deflection electrode plate in real time without mechanically manipulating the deflection electrode plate, the technical problem that the printed pattern will be obviously deformed when the moving speed of the substrate changes greatly or the moving direction is opposite can be solved.

[0041] The embodiment of the present invention provides a deflection electrode for a coding device, which can be referred to Figure 6 , Figure 7a and Figure 7b As shown, it includes: a first polarity electrode plate assembly 14 and a second polarity electrode plate assembly 15, the first polarity and the second polarity are opposite polarities. It can be understood that when the first polarity is positive, the second polarity is negative; when the first polarity is negative, the second polarity is positive. Figure 6 A schematic diagram looking from top to bottom.

[0042] The first polarity electrode plate assembly 14 and the second polarity electrode plate assembly 15 are arranged opposite to each other. In one embodiment, the first polarity electrode plate assembly 14 and the second polarity electrode plate assembly 15 are arranged parallel to each other; in another embodiment, the first polarity electrode plate assembly 14 and the second polarity electrode plate assembly 15 are arranged in a manner of forming a certain angle. The surface of the first polarity electrode plate assembly 14 and the second polarity electrode plate assembly 15 opposite to each other is the first surface, and the surface of the second polarity electrode plate assembly 15 and the first polarity electrode plate assembly 14 opposite to each other is the second surface. When voltages of corresponding electrical polarities are applied to the first polarity electrode plate assembly 14 and the second polarity electrode plate assembly 15, the area between the first surface of the first polarity electrode plate assembly 14 and the second surface of the second polarity electrode plate assembly 15 forms a deflection electric field of the deflection electrode of the inkjet device. Figure 6 An example is given in which the first polarity electrode plate assembly 14 is a negative electrode plate assembly and the second polarity electrode plate assembly 15 is a positive electrode plate assembly, and an example is given in which the first polarity electrode plate assembly 14 and the second polarity electrode plate assembly 15 are arranged parallel to each other.

[0043] The first polarity electrode plate assembly includes m first polarity electrode plates electrically insulated from each other and arranged in a manner that the deflection direction of the deflection electric field is controllable, where m is a natural number greater than or equal to 2, for example, m is 2, 3 or 4. The m first polarity electrode plates are arranged along the moving direction of the substrate when the inkjet printer is working. In one embodiment, at least two of the m first polarity electrode plates are arranged along the moving direction of the substrate. Figure 6 In the schematic diagram shown, the substrate moves in the horizontal direction ( Figure 6Further, an example of horizontal rightward movement is given. It can be understood that the direction of movement of the substrate can also be horizontal leftward movement or left-right reciprocating movement). Figure 6 In the case shown, at least two of the m first polarity electrode plates are arranged in the horizontal direction. It can be understood that if the moving direction of the substrate is the vertical direction, then at least two of the m first polarity electrode plates are arranged in the vertical direction; more preferably, the at least two first polarity electrode plates are arranged in the moving direction of the substrate (in Figure 6 In the case shown, the substrate moves in the horizontal direction) and is arranged side by side. In another embodiment, the m first polarity electrode plates are arranged along the substrate moving direction. Figure 6 In the schematic diagram shown, m first polarity electrode plates are arranged in the horizontal direction. It can be understood that if the moving direction of the substrate is the vertical direction, then the m first polarity electrode plates are arranged in the vertical direction. Figure 6 In the schematic diagram shown, the first polarity electrode plate assembly 14 includes two first polarity electrode plates, the first first polarity electrode plate 141 and the second first polarity electrode plate 142 are electrically insulated from each other, and are arranged side by side in the horizontal direction and parallel to the second polarity electrode plate assembly 15.

[0044] When voltages of corresponding electrical polarity are applied to m first polarity electrode plates and the second polarity electrode plate assembly, the area between the first surface of each first polarity electrode plate and the second surface of the second polarity electrode plate assembly in the m first polarity electrode plates forms an electric field for each first polarity electrode plate, and all the electric fields for each first polarity electrode plate are superimposed to form a deflection electric field of the deflection electrode of the inkjet device. The deflection direction of the deflection electric field can be controlled by adjusting the voltage applied to the m first polarity electrode plates. Figure 6 In the schematic diagram shown, a first electric field for the first polarity electrode plate 141 is formed between the first surface of the first polarity electrode plate 141 and the second surface of the second polarity electrode plate assembly 15, and a second electric field for the second polarity electrode plate 142 is formed between the first surface of the second polarity electrode plate 142 and the second surface of the second polarity electrode plate assembly 15. The first electric field for the first polarity electrode plate 141 and the second electric field for the second polarity electrode plate 142 are superimposed to form a deflection electric field of the deflection electrode of the inkjet device.

[0045] The voltage applied to the m first polarity electrode plates may be adjusted by adjusting the voltage applied to one of the m first polarity electrode plates, or by adjusting the voltage applied to multiple of the m first polarity electrode plates. Figure 6In the schematic diagram shown, the voltage applied to the first first polarity electrode plate 141 or the second polarity electrode plate 142 can be adjusted to control the deflection direction of the deflection electric field, and the voltage applied to the first first polarity electrode plate 141 and the second polarity electrode plate 142 can also be adjusted to control the deflection direction of the deflection electric field.

[0046] For ease of understanding, examples are given with m being 2 and 3. When m is 2, refer to Figure 6 The first polarity electrode plate assembly includes two first polarity electrode plates, the two first polarity electrode plates are a first first polarity electrode plate 141 and a second first polarity electrode plate 142, the first first polarity electrode plate 141 and the second first polarity electrode plate 142 are arranged in a manner that the deflection direction of the deflection electric field is controllable and are electrically insulated from each other, the second polarity electrode plate assembly 15 includes a first second polarity electrode plate, and corresponding polarities are applied to the first first polarity electrode plate 141, the second first polarity electrode plate 142 and the first second polarity electrode plate, respectively. When the voltage is high, the area between the first surface of the first first polarity electrode plate 141 and the second surface of the first second polarity electrode plate forms a first electric field for the first first polarity electrode plate 141, and the area between the first surface of the second first polarity electrode plate 142 and the second surface of the first second polarity electrode plate forms a second electric field for the second first polarity electrode plate 142. The first electric field and the second electric field are superimposed to form the deflection electric field of the deflection electrode of the inkjet device, wherein when the first polarity is positive, the second polarity is negative; when the first polarity is negative, the second polarity is positive. In a preferred embodiment, the first surface of the first first polarity electrode plate 141 and the first surface of the second first polarity electrode plate 142 are the same in area; in another preferred embodiment, the area of ​​the first surface of the first first polarity electrode plate 141 is close to one-half of the area of ​​the second surface of the second polarity electrode plate assembly 15, and the area of ​​the first surface of the second first polarity electrode plate 142 is close to one-half of the area of ​​the second surface of the second polarity electrode plate assembly 15. In one embodiment, the first first polarity electrode plate 141 and the second first polarity electrode plate 142 are arranged along the moving direction of the substrate. Preferably, the first first polarity electrode plate 141 and the second first polarity electrode plate 142 are arranged side by side along the moving direction of the substrate. Figure 6In the case shown, the moving direction of the substrate is consistent with the width direction of the second polarity electrode plate assembly 15. When m is 3 (not shown), the first polarity electrode plate assembly includes three first polarity electrode plates, and the three first polarity electrode plates can be respectively the first first polarity electrode plate, the second first polarity electrode plate and the third first polarity electrode plate. The first first polarity electrode plate, the second first polarity electrode plate and the third first polarity electrode plate are arranged in a controllable manner so that the deflection direction of the deflection electric field can be controlled and are electrically insulated from each other. When voltages of corresponding electrical polarities are applied to the first first polarity electrode plate, the second first polarity electrode plate, the third first polarity electrode plate and the second polarity electrode plate assembly, The area between the first surface of the first first polarity electrode plate and the second surface of the second polarity electrode plate assembly forms a first electric field for the first first polarity electrode plate, the area between the first surface of the second first polarity electrode plate and the second surface of the second polarity electrode plate assembly forms a second electric field for the second first polarity electrode plate, and the area between the first surface of the third first polarity electrode plate and the second surface of the second polarity electrode plate assembly forms a third electric field for the third first polarity electrode plate. The first electric field, the second electric field and the third electric field are superimposed to form a deflection electric field of the deflection electrode of the inkjet device. In a preferred embodiment, the first surface of the first first polarity electrode plate and the first surface of the third first polarity electrode plate are of the same size; in another preferred embodiment, the first surface of the first first polarity electrode plate, the first surface of the second first polarity electrode plate and the first surface of the third first polarity electrode plate are of the same size; in yet another preferred embodiment, the first surface of the first first polarity electrode plate is close to one-third of the area of ​​the second surface of the second polarity electrode plate assembly, the first surface of the second first polarity electrode plate is close to one-third of the area of ​​the second surface of the second polarity electrode plate assembly, and the first surface of the third first polarity electrode plate is close to one-third of the area of ​​the second surface of the second polarity electrode plate assembly. In one embodiment, two of the first first polarity electrode plates among the first first polarity electrode plate, the second first polarity electrode plate and the third first polarity electrode plate are arranged along the moving direction of the printing plate, and more preferably, the first first polarity electrode plate, the second first polarity electrode plate and the third first polarity electrode plate are arranged along the moving direction of the printing plate. In another embodiment, two of the first polarity electrode plates, the second polarity electrode plate, and the third polarity electrode plate are arranged side by side along the moving direction of the printing plate; more preferably, the first polarity electrode plate, the second polarity electrode plate, and the third polarity electrode plate are arranged side by side along the moving direction of the printing plate. In one embodiment, for example Figure 6In the case shown, the moving direction of the substrate is consistent with the width direction of the second polarity electrode plate assembly. By analogy, those skilled in the art can know the arrangement of other numbers of first polarity electrode plates. Among them, when the first polarity electrode plate assembly is a positive electrode plate assembly, the second polarity electrode plate assembly is a negative electrode plate assembly; when the first polarity electrode plate assembly is a negative electrode plate assembly, the second polarity electrode plate assembly is a positive electrode plate assembly.

[0047] In one embodiment, the second polarity electrode plate assembly includes a second polarity electrode plate.

[0048] In another embodiment, the second polarity electrode plate assembly includes n second polarity electrode plates electrically insulated from each other, where n is a natural number greater than or equal to 2, for example, n is 2, 3 or 4. The arrangement of the n second polarity electrode plates included in the second polarity electrode plate assembly can refer to the arrangement of the m first polarity electrode plates included in the aforementioned first polarity electrode plate assembly, and will not be repeated for the sake of space saving. Among them, n and m can be equal or unequal. The n second polarity electrode plates can also be arranged in a manner in which the deflection direction of the deflection electric field can be controlled.

[0049] The deflection electrode of the inkjet device provided in the embodiment of the present invention can automatically control the deflection direction of the deflection electric field in real time by automatically adjusting the voltage applied to the m negative electrode plates in real time.

[0050] The basic working principle of the deflection electrode of the inkjet device provided by the embodiment of the present invention is described below. For the sake of clarity, the first polarity electrode plate assembly is a negative electrode plate assembly, the second polarity electrode plate assembly is a positive electrode plate assembly, m is 2, and the same can be referred to. Figure 6The first polarity electrode plate assembly includes a first negative electrode plate 141 and a second negative electrode plate 142, and the second polarity electrode plate assembly 15 includes a first positive electrode plate. Although only an exemplary description is given here using the combination mode of three electrode plates consisting of two negative electrode plates and one positive electrode plate as an example, those skilled in the art can understand based on the description of the embodiment of the present invention that the deflection electrode of the inkjet device provided in the embodiment of the present invention can also include a combination mode of three electrode plates consisting of two positive electrode plates and one negative electrode plate (in this case, the first polarity electrode plate assembly 14 is a positive electrode plate assembly, and the second polarity electrode plate assembly 15 is a negative electrode plate assembly, and accordingly, the first polarity electrode plate assembly includes a first positive electrode plate 141 and a second positive electrode plate 142, and the second polarity electrode plate assembly 15 includes a first negative electrode plate), or a combination mode of four electrode plates consisting of two positive electrode plates and two negative electrode plates, and so on. In short, the deflection electrode of the inkjet device provided in the embodiment of the present invention can include all other feasible combination modes except the combination mode of two electrode plates consisting of a positive electrode plate and a negative electrode plate, and which are arranged in a controllable manner in the deflection direction of the deflection electric field.

[0051] Assume that the first positive voltage applied to the first positive electrode plate is "+V", the first negative voltage applied to the first negative electrode plate is "-V1", and the second negative voltage applied to the second negative electrode plate is "-V2", wherein a first electric field T1 is formed between the first surface of the first negative electrode plate and the second surface of the first positive electrode plate, such as Figure 7a As shown; a second electric field T2 is formed between the first surface of the second negative electrode plate and the second surface of the first positive electrode plate, such as Figure 7b As shown. The first electric field T1 and the second electric field T2 are superimposed to form the deflection electric field T of the deflection electrode of the inkjet device. The direction of the deflection electric field T depends on the relative strength between the first electric field T1 and the second electric field T2. When the strength of the first electric field T1 and the second electric field T2 are equal, the direction of the deflection electric field T is parallel to the central axis direction of the electrode plate "+V", as shown in FIG. Figure 8 When the intensity of the first electric field T1 is stronger than the intensity of the second electric field T2, the direction of the deflection electric field T presents the same direction as the deflection of the first electric field T1, as shown in FIG. Fig. 9 When the intensity of the second electric field T2 is stronger than that of the first electric field T1, the direction of the deflection electric field T presents the same direction as the deflection of the second electric field T2, as shown in FIG. Fig.10 shown.

[0052] Moreover, the deflection direction of the deflection electric field T can be controlled by changing the voltage "-V1" applied to the first negative electrode plate and / or the voltage "-V2" applied to the second negative electrode plate. The greater the potential difference between the voltage "-V1" applied to the first negative electrode plate and the voltage "-V2" applied to the second negative electrode plate, the greater the deflection angle of the deflection electric field T; the smaller the potential difference between the voltage "-V1" applied to the first negative electrode plate and the voltage "-V2" applied to the second negative electrode plate, the smaller the deflection angle of the deflection electric field T. The deflection direction of the deflection electric field T can eliminate the deformation of the printed pattern caused by changes in the moving speed of the substrate. For example, when the moving speed of the substrate is less than the rated speed, such as Figure 4b As shown, the embodiment of the present invention adjusts the deflection direction of the deflection electric field, for example, by using Fig.10 The deflection electric field shown in FIG. 1 compensates for the possible deformation of the printed pattern; similarly, when the moving speed of the substrate is greater than the rated speed, such as Figure 4c As shown, the embodiment of the present invention can adopt Fig. 9 The deflection electric field shown compensates for possible deformation of the printed pattern.

[0053] In practical applications, the deflection direction of the deflection electric field T can be easily controlled by controlling only one of the voltage values ​​of the voltage "-V1" applied to the first negative electrode plate and the voltage "-V2" applied to the second negative electrode plate.

[0054] The deflection electrode of the inkjet device proposed in the embodiment of the present invention changes the existing combination mode of the deflection electrode plates composed of one positive and one negative electrode plates, by replacing one of the electrode plates with two or more electrode plates that do not change the polarity of the electrode plate, or replacing the two electrode plates with two or more electrode plates that do not change the polarity of the electrode plates, and these electrode plates are arranged in a controllable deflection direction of the deflection electric field, and then the deflection direction of the deflection electric field can be controlled by controlling the voltage applied to each electrode plate with the same polarity, without the need for any mechanical manipulation of the electrode plates, wherein only the direction of the electric field is deflected, not the electrode plates themselves.

[0055] In a preferred embodiment, the edge of the first polarity electrode plate assembly along the side-by-side direction of the m first polarity electrode plates is aligned with the corresponding edge of the second polarity electrode plate assembly.

[0056] The embodiment of the present invention also provides a coding device, such as Figure 6As shown, it includes a print head, a speed sensor (not shown) and a processor (not shown), the print head includes the aforementioned deflection electrode plate, the first polarity electrode plate assembly 14 and the second polarity electrode plate assembly 15 are arranged opposite to each other. The speed sensor is used to obtain the moving speed of the substrate 17 located below the print head in real time, and the below here means the below relative to the flying direction of the ink droplets. Figure 6 In the illustrated situation, the bottom of the nozzle indicates the bottom in the vertical direction. If the flying direction of the ink droplets is the horizontal direction, the bottom of the nozzle indicates the left side in the horizontal direction (when the flying direction of the ink droplets is horizontally to the left) or the right side (when the flying direction of the ink droplets is horizontally to the right). The m first polarity electrode plates are arranged along the moving direction of the substrate 17 when the inkjet device is working. The processor is connected to the speed sensor, and the voltage applied to the m first polarity electrode plates is adjusted based on the moving speed of the substrate 17 acquired in real time by the speed sensor. In one embodiment, the voltage applied to the m first polarity electrode plates is adjusted based on the moving speed of the substrate 17 acquired in real time by the speed sensor, including: based on the moving speed of the substrate 17 acquired in real time, the deflection direction that the deflection electric field T needs to compensate is calculated in real time; based on the deflection direction that the deflection electric field T needs to compensate calculated in real time, the potential difference value is calculated; and based on the calculated potential difference value, the voltage applied to the m first polarity electrode plates is adjusted.

[0057] Among them, adjusting the voltage applied to the m first polarity electrode plates may be adjusting the voltage applied to one of the m first polarity electrode plates, or may be adjusting the voltage applied to multiple of the m first polarity electrode plates.

[0058] The moving speed of the printing substrate 17 here includes the moving rate of the printing substrate. In some applications, the moving speed of the printing substrate also includes the moving direction of the printing substrate.

[0059] Continue to refer Figure 6 The nozzle also includes a nozzle 11, a charging tank 12 and a recovery pipe 16. The nozzle 11 is used to spray continuous and uniform ink droplets 13 at a certain pressure; the charging tank 12 is located below the nozzle 11, and is used to charge or not charge the ink droplets 13 sprayed from the nozzle 11 under the control of a computer; the deflection electrode of the inkjet device is located below the charging tank 12, and a voltage is applied to the first polarity electrode plate assembly 14 and the second polarity electrode plate assembly 15 included therein, so that a deflection electric field is formed in the area between the first surface of the first polarity electrode plate assembly 14 and the second surface of the second polarity electrode plate assembly 15 to cause the flight trajectory of the charged ink droplets to be deflected, and when the deflection direction needs to be compensated, the voltage applied to the m first polarity electrode plates is adjusted based on the moving speed of the substrate 17 obtained in real time; the recovery pipe 16 is located below the nozzle 11, and is used to recover the uncharged ink droplets.

[0060] In one embodiment, the speed sensor includes an axis encoder, through which real-time data of the moving speed of the printing material 17 can be obtained.

[0061] It can be understood that the charged ink droplets carry a first polarity charge after passing through the charging slot 12. When the charged ink droplets carrying the first polarity charge pass through the deflection electric field of the deflection electrode of the coding device, they will be deflected from the first polarity electrode plate assembly 14 to the second polarity electrode plate assembly 15. If the charged ink droplets carry a second polarity charge after passing through the charging slot 12, when the charged ink droplets carrying the second polarity charge pass through the deflection electric field of the deflection electrode of the coding device, they will be deflected from the second polarity electrode plate assembly 15 to the first polarity electrode plate assembly 14. In order to solve the technical problem that the printed pattern will be significantly deformed when the moving speed of the substrate changes greatly, the embodiment of the present invention can compensate for the possible deformation of the printed pattern caused by the moving speed of the substrate by controlling the deflection direction of the deflection electric field, so that even when the moving speed of the substrate changes greatly, the printed pattern will not be significantly deformed. For example, in Figure 4b In the case shown, since the moving speed of the substrate is less than the rated speed and there is a large deviation, in the same column of ink droplets, the ink droplets printed later will fall on the right side of the ink droplets printed earlier, causing the printed pattern to be significantly deformed. In view of this situation, the deflection electrode proposed in the embodiment of the present invention can control the deflection direction of the deflection electric field to compensate for the possible deformation of the printed pattern, for example, by using Fig.10 The deflection direction of the deflection electric field shown compensates for the possible deformation of the printed pattern; Figure 4c In the case shown, since the moving speed of the substrate is greater than the rated speed and there is a large deviation, in the same column of ink droplets, the ink droplets printed later will fall on the side of the ink droplets printed earlier that is opposite to the moving direction of the substrate, causing the printed pattern to be significantly deformed. In view of this situation, the deflection electrode proposed in the embodiment of the present invention can control the deflection direction of the deflection electric field to compensate for the possible deformation of the printed pattern. For example, it can be used Fig. 9 The deflection direction of the deflection electric field shown compensates for possible deformation of the printed pattern.

[0062] When the inkjet device proposed in the embodiment of the present invention performs inkjet printing, under the control of the computer, the nozzle 11 provides continuous and uniform ink droplets 13 at a certain pressure. The ink droplets 13 fly under the action of pressure and first pass through the charging slot 12. When passing through the charging slot 12, the ink droplets 13 are charged or not charged under the control of the computer; after passing through the charging slot 12, the ink droplets continue to fly and pass through the deflection electric field formed by the deflection electrode of the inkjet device, wherein the charged ink droplets will deflect their flight trajectory when flying through the deflection electric field formed by the deflection electrode of the inkjet device and fall on the corresponding position of the surface of the substrate 17 passing under the nozzle at a certain moving speed; the uncharged ink droplets will not deflect their flight trajectory when flying through the deflection electric field formed by the deflection electrode of the inkjet device and fall into the recovery tube 16 arranged below the nozzle 11 and above the substrate 17 and be recovered by the recovery tube 16.

[0063] The following describes a preferred embodiment of the deflection electrode of the inkjet device proposed in the embodiment of the present invention.

[0064] Example 1

[0065] In this embodiment, to facilitate understanding of the embodiments of the present invention, the first polarity electrode plate assembly is a negative electrode plate assembly, the second polarity electrode plate assembly is a positive electrode plate assembly, m is 2, n is 2, the first polarity electrode plate assembly includes a first negative electrode plate and a second negative electrode plate, and the second polarity electrode plate assembly includes a first positive electrode plate and a second positive electrode plate.

[0066] Assume that the voltage applied to the first positive electrode plate is "+V1", the voltage applied to the second positive electrode plate is "+V2", the voltage applied to the first negative electrode plate is "-V1", and the voltage applied to the second negative electrode plate is "-V2", wherein a first electric field T1 is formed between the first surface of the first negative electrode plate and the second surface of the first positive electrode plate, such as Fig.11a As shown; a second electric field T2 is formed between the first surface of the first negative electrode plate and the second surface of the second positive electrode plate, such as Fig.11b As shown; a third electric field T3 is formed between the first surface of the second negative electrode plate and the second surface of the first positive electrode plate, such as Fig.11c As shown; a fourth electric field T4 is formed between the first surface of the second negative electrode plate and the second surface of the second positive electrode plate, such as Fig.11d As shown. The first electric field T1, the second electric field T2, the third electric field T3 and the fourth electric field T4 are superimposed to form the deflection electric field T of the deflection electrode of the inkjet device. The deflection direction of the deflection electric field T is controlled by changing the voltage "-V1" applied to the first negative electrode plate, the voltage "-V2" applied to the second negative electrode plate, the voltage "+V1" applied to the first positive electrode plate and / or the potential of the second positive electrode plate.

[0067] Example 2

[0068] In this embodiment, to facilitate understanding of the embodiments of the present invention, the first polarity electrode plate assembly is a negative electrode plate assembly, the second polarity electrode plate assembly is a positive electrode plate assembly, m is 3, n is 1, the first polarity electrode plate assembly includes a first negative electrode plate, a second negative electrode plate and a third negative electrode plate, and the second polarity electrode plate assembly includes a first positive electrode plate.

[0069] Assume that the voltage applied to the first positive electrode plate is "+V", the voltage applied to the first negative electrode plate is "-V1", the voltage applied to the second negative electrode plate is "-V2", and the voltage applied to the third negative electrode plate is "-V3", wherein a first electric field T1 is formed between the first surface of the first negative electrode plate and the second surface of the first positive electrode plate, such as Fig.12a As shown; a second electric field T2 is formed between the first surface of the second negative electrode plate and the second surface of the first positive electrode plate, such as Figure 12b As shown; a third electric field T3 is formed between the first surface of the third negative electrode plate and the second surface of the first positive electrode plate, such as Fig.12c As shown. The first electric field T1, the second electric field T2 and the third electric field T3 are superimposed to form the deflection electric field T of the deflection electrode of the inkjet device. The deflection direction of the deflection electric field T is controlled by changing the potential of the voltage "-V1" applied to the first negative electrode plate, the voltage "-V2" applied to the second negative electrode plate and / or the voltage "-V3" applied to the third negative electrode plate.

[0070] Example 3

[0071] In this embodiment, in order to facilitate installation, the opposing surfaces of every two adjacent first polarity electrode plates among the m first polarity electrode plates in the embodiment of the present invention are insulated, so that the opposing surfaces of every two adjacent first polarity electrode plates can be easily installed and fixed after the insulation treatment.

[0072] In one embodiment, the insulation treatment includes: fixing an insulating strip on the opposite surfaces of every two adjacent first polarity electrode plates among the m first polarity electrode plates, the insulating strip can be fixed on the opposite surface of any one of every two adjacent first polarity electrode plates, and the opposite surface of the other first polarity electrode plate is in contact with the insulating strip; the insulating strip can also be fixed on the opposite surfaces of two first polarity electrode plates among every two adjacent first polarity electrode plates, and the insulating strips are in contact with each other.

[0073] In another embodiment, the insulation treatment includes: fixing an insulating layer on the surface of each first polarity electrode plate among m first polarity electrode plates opposite to the adjacent first polarity electrode plate, and the insulating layer of the first polarity electrode plate contacts the opposite surface of the adjacent first polarity electrode plate, or when the insulating layer is also fixed on the opposite surface of the adjacent first polarity electrode plates, the insulating layer of the first polarity electrode plate contacts the insulating layer of the adjacent first polarity electrode plate.

[0074] It can be understood that, in one embodiment, if the second polarity electrode plate assembly includes n second polarity electrode plates, it can also be implemented with reference to the above embodiment, and those skilled in the art can clearly understand its implementation method based on the description of the above embodiment.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0076] The above is an explanation of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A deflection electrode for a coding device, characterized in that: include: A first polarity electrode plate assembly and a second polarity electrode plate assembly, wherein the first polarity and the second polarity are opposite to each other; The first polarity electrode plate assembly and the second polarity electrode plate assembly are arranged opposite to each other, the surface of the first polarity electrode plate assembly opposite to the second polarity electrode plate assembly is the first surface, the surface of the second polarity electrode plate assembly opposite to the first polarity electrode plate assembly is the second surface, and the area between the first surface of the first polarity electrode plate assembly and the second surface of the second polarity electrode plate assembly can form a deflection electric field of the deflection electrode of the inkjet device; Wherein, the first polarity electrode plate assembly includes m first polarity electrode plates electrically insulated from each other and arranged in a manner that the deflection direction of the deflection electric field is controllable, and m is a natural number greater than or equal to 2; when voltages of corresponding electrical polarities are respectively applied to the m first polarity electrode plates and the second polarity electrode plate assembly, an electric field for each first polarity electrode plate is formed in the area between the first surface of each first polarity electrode plate in the m first polarity electrode plates and the second surface of the second polarity electrode plate assembly, and all the electric fields for each first polarity electrode plate are superimposed to form the deflection electric field of the deflection electrode of the inkjet device; The deflection direction of the deflection electric field is controllable, including: adjusting the voltage applied to the m first polarity electrode plates to control the deflection direction of the deflection electric field; The adjusting the voltage applied to the m first polarity electrode plates comprises: adjusting the voltage applied to one first polarity electrode plate among the m first polarity electrode plates, or adjusting the voltage applied to multiple first polarity electrode plates among the m first polarity electrode plates; The m first polarity electrode plates are arranged side by side along the moving direction of the substrate, and the first polarity electrode plate assembly and the second polarity electrode plate assembly are arranged parallel to each other; The adjusting the voltage applied to the m first polarity electrode plates includes: adjusting the voltage applied to the m first polarity electrode plates based on the moving speed of the substrate acquired in real time.

2. The deflection electrode of the inkjet device according to claim 1, characterized in that: m is 2, 3 or 4.

3. The deflection electrode of the inkjet device according to claim 1, characterized in that: The second polarity electrode plate assembly includes a second polarity electrode plate; or, The second polarity electrode plate assembly includes n second polarity electrode plates electrically insulated from each other, where n is a natural number greater than or equal to 2.

4. The deflection electrode of the inkjet device according to claim 1, characterized in that: m is 2, the first polarity electrode plate assembly includes a first negative electrode plate and a second negative electrode plate, the second polarity electrode plate assembly includes a first positive electrode plate, a first positive voltage is applied to the first positive electrode plate, a first negative voltage is applied to the first negative electrode plate, and a second negative voltage is applied to the second negative electrode plate, wherein a first electric field is formed between the first surface of the first negative electrode plate and the second surface of the first positive electrode plate, a second electric field is formed between the first surface of the second negative electrode plate and the second surface of the first positive electrode plate, and the first electric field and the second electric field are superimposed to form a deflection electric field of the deflection electrode of the inkjet device; Controlling the deflection direction of the deflection electric field in response to adjustment of a first negative voltage applied to the first negative electrode plate or a second negative voltage applied to the second negative electrode plate; or, m is 2, the first polarity electrode plate assembly includes a first positive electrode plate and a second positive electrode plate, the second polarity electrode plate assembly includes a first negative electrode plate, a first negative voltage is applied to the first negative electrode plate, a first positive voltage is applied to the first positive electrode plate, and a second positive voltage is applied to the second positive electrode plate, wherein a first electric field is formed between the first surface of the first positive electrode plate and the second surface of the first negative electrode plate, a second electric field is formed between the first surface of the second positive electrode plate and the second surface of the first negative electrode plate, and the first electric field and the second electric field are superimposed to form a deflection electric field of the deflection electrode of the inkjet device; The deflection direction of the deflection electric field is controlled in response to adjustment of a first positive voltage applied to the first positive electrode plate or a second positive voltage applied to the second positive electrode plate.

5. A coding device, characterized in that: The device comprises a nozzle, a speed sensor and a processor, wherein the nozzle comprises a deflection electrode of the inkjet device according to any one of claims 1 to 4, wherein the first polarity electrode plate assembly and the second polarity electrode plate assembly are arranged opposite to each other, the speed sensor is used to obtain the moving speed of the substrate under the nozzle in real time, and the m first polarity electrode plates are arranged along the moving direction of the substrate when the inkjet device is working, and the processor calculates the deflection direction that needs to be compensated for the deflection electric field in real time based on the moving speed of the substrate obtained in real time; Calculate the potential difference value based on the deflection direction that needs to be compensated for the deflection electric field calculated in real time; And based on the calculated potential difference value, adjusting the voltage applied to the m first polarity electrode plates.

6. The coding device according to claim 5, characterized in that: The speed sensor includes an axis encoder, through which real-time data of the moving speed of the printing material is obtained.

7. The coding device according to claim 5, characterized in that: The nozzle also includes a nozzle, a charging tank and a recovery pipe. The charging tank is located below the nozzle and is used to charge at least part of the ink droplets ejected from the nozzle under the control of a computer. The deflection electrode of the inkjet device is located below the charging tank. By applying a voltage to the first polarity electrode plate assembly and the second polarity electrode plate assembly, a deflection electric field is formed in the area between the first surface of the first polarity electrode plate assembly and the second surface of the second polarity electrode plate assembly to cause the flight trajectory of the charged ink droplets to be deflected. When the deflection direction of the deflection electric field needs to be compensated, the voltage applied to the m first polarity electrode plates is adjusted based on the moving speed of the substrate obtained in real time. The recovery tank is located below the deflection electric field and is used to recover uncharged ink droplets.

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