Electrofluid repair printing device and ink-jet printing system

Abstract

The invention relates to an electrofluid repair printing device and an ink-jet printing system.The electrofluid repair printing device comprises a mounting frame and at least one repair assembly, the repair assemblies are mounted on the mounting frame, and each repair assembly comprises a three-axis movement mechanism mounted on the mounting frame; the electrofluid spray head is vertically arranged, and the three-axis movement mechanism drives the electrofluid spray head to move up and down, left and right and front and back; and the imaging direction of the real-time visual imaging piece is inclined to the horizontal plane, and the real-time visual imaging piece is aligned to the drop point position of the liquid drops sprayed by the electrofluid spray head. The electrofluid spray head is vertically arranged, the electric field force is consistent with the spraying direction of the functional liquid, the liquid drops sprayed by the electrofluid spray head fall onto the bonding pad in a linear path, and the liquid drops are not prone to being subjected to the force in the horizontal direction, so that the possibility that the liquid drops move in the horizontal direction in the falling process is reduced, the precision of the dropping point of the liquid drops is improved, and the production efficiency is improved. The liquid drops are ensured to be printed on the corresponding bonding pads, and the repairing effect is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of display device repair, and in particular to an electrofluid repair printing device and an inkjet printing system. Background Art

[0002] MicroLED (micro light emitting diode) display devices are widely used due to their small size, low power consumption, high brightness, high color saturation, fast response and long life. In order to improve the yield of Micro LED display devices, in the preparation process of existing Micro LED display devices, after the LED chip is transferred, the LED chip will be accurately addressed, detected and repaired to eliminate the light-emitting chips that cannot display and improve the yield of the display device.

[0003] In related technologies, after the chip bad spots are found through visual recognition technology, it is determined whether silver paste or insulating glue needs to be printed based on the defect type. After the bad spots are removed by laser, the required functional liquid is printed on the corresponding pad. In some technologies, in order to ensure that the functional liquid is printed to the specified position and the printed droplets are not distorted, so as to improve the reliability of printing, each nozzle needs to be equipped with a real-time monitoring camera, and the camera needs to be arranged vertically to ensure that the imaging result is not distorted. In this setting, the nozzle needs to be arranged at an angle to leave the upper space for the camera and avoid the camera's imaging path.

[0004] However, due to the tilted setting of the nozzle, the functional liquid is ejected from the nozzle in a parabolic shape. In particular, when printing with an electrofluid nozzle, although the nozzle is in a tilted state, the electric field force is in a vertical direction, so the functional liquid has a larger ejection arc after being ejected. Each time the nozzle ejects, the functional liquid forms droplets at the nozzle and is ejected. Since there is a slight difference in the amount of droplets ejected each time, the electric field force, the tension between the functional liquids, and the state at the nozzle cannot be guaranteed to be completely consistent each time. When the nozzle is tilted, the ejection arc of the droplets ejected each time will be different, so the droplet landing point is random, and it is difficult to control the droplets to fall to the specified position.

[0005] Therefore, in the related technology, although the landing point and morphology of the printed droplets can be observed in real time, due to the tilted arrangement of the nozzle, it is difficult to control the printing landing point, and it is difficult to print the droplets to the desired position. The printing accuracy is poor, which affects the repair effect and efficiency. Summary of the invention

[0006] The embodiments of the present application provide an electrofluid repair printing device and an inkjet printing system to solve the technical problems in the related art that the printing landing point is difficult to control, it is difficult to print droplets to the desired position, the printing accuracy is poor, and the repair effect and efficiency are affected.

[0007] In a first aspect, an electrofluid repair printing device is provided, which comprises a mounting frame and at least one set of repair components, wherein the repair components are mounted on the mounting frame and are suitable for printing functional fluid at the repair point, wherein the repair components comprise:

[0008] A three-axis motion mechanism, the three-axis motion mechanism is mounted on the mounting frame;

[0009] An electric fluid nozzle, the electric fluid nozzle is vertically arranged, and the electric fluid nozzle is installed at the driving end of the three-axis motion mechanism, so that the three-axis motion mechanism drives the electric fluid nozzle to move up and down, left and right, and forward and backward;

[0010] A real-time visual imaging component is located at one side of the electrofluid nozzle and is mounted on the mounting frame. The imaging direction of the real-time visual imaging component is inclined to the horizontal plane, and the real-time visual imaging component is aligned with the landing point of the droplets ejected from the electrofluid nozzle.

[0011] In some embodiments, the repair component also includes a mounting seat, which is made of insulating material. The mounting seat is installed at the driving end of the three-axis motion mechanism. A mounting groove is opened on the side of the mounting seat. The electrofluid nozzle is installed in the mounting groove, and the injection end of the electrofluid nozzle extends to the bottom of the mounting seat.

[0012] In some embodiments, the electrofluidic showerhead comprises:

[0013] A needle body, the needle body is made of a conductive material, the needle body is used to be electrically connected to an external power supply device, and the needle body is installed in the installation groove;

[0014] A spray needle portion, the spray needle portion is communicated with the needle body portion, the spray needle portion is made of insulating material, and the spray needle portion is located below the mounting seat;

[0015] An electrode wire is passed through the needle body and the spray needle, and one end of the electrode wire extends to the nozzle of the spray needle, and the electrode wire is electrically connected to the needle body.

[0016] In some embodiments, the electrofluid nozzle further includes a positioning block, the positioning block is made of a conductive material, the positioning block is sleeved on the needle body and electrically connected to the needle body;

[0017] The repair component also includes a power supply component, which is installed at the bottom of the installation groove. The positioning block is pressed against the power supply component to be electrically connected to the power supply component, and the power supply component is used to be electrically connected to an external power supply device.

[0018] In some embodiments, the power supply comprises:

[0019] A magnetic adsorption member, wherein the magnetic adsorption member is suitable for adsorbing the positioning block;

[0020] An electrode ring is pressed against the positioning block to be electrically connected to the positioning block.

[0021] In some embodiments, the repair component further comprises a positioning sleeve, the positioning sleeve is made of a metal conductive material, and an opening is provided on a circumferential side of the positioning sleeve so that the needle body can enter the positioning sleeve from a side of the positioning sleeve;

[0022] The positioning sleeve is embedded in the installation groove, and the bottom surface of the positioning block is in contact with the top surface of the positioning sleeve.

[0023] In some embodiments, the corners of the positioning sleeve are arc-shaped transitions.

[0024] In some embodiments, the repair assembly further includes a limiting assembly, and the limiting assembly is used to press the electric fluid nozzle tightly into the mounting groove; the limiting assembly includes:

[0025] A limit plate, one end of which is hinged to a side surface of the mounting seat where the mounting groove is provided, and the other end of which is fixed to the mounting seat by bolts so that the limit plate spans the mounting groove;

[0026] A limiting screw is threadedly disposed in the limiting plate, and when the limiting plate spans the mounting slot, the limiting screw extends to the mounting slot and presses against the electrofluid nozzle.

[0027] In some embodiments, the angle between the imaging direction of the real-time visual imaging element and the horizontal plane is 10-30 degrees.

[0028] In some embodiments, the electrofluid repair printing device also includes a visual detection component, which includes a wide-angle camera and a high-magnification camera. The wide-angle camera and the high-magnification camera are both mounted on the mounting frame. The imaging directions of the wide-angle camera and the high-magnification camera are both vertically arranged to perform imaging detection on the printed droplets.

[0029] In some embodiments, the electrofluid repair printing device further comprises a distance measuring device, wherein the distance measuring device is mounted on the mounting frame, and the distance measuring direction of the distance measuring device is vertically arranged to determine the distance between the electrofluid nozzle and the printing plane.

[0030] In some embodiments, the electrofluid repair printing device further comprises:

[0031] A seat body, the seat body is used to be installed on the driving end of the external moving mechanism, and the mounting frame is lifted and slidably arranged on the seat body;

[0032] A main lifting drive member is connected to the mounting frame to drive the mounting frame to move up and down relative to the seat body.

[0033] The beneficial effects of the technical solution provided by this application include:

[0034] An embodiment of the present application provides an electrofluid repair printing device. When repairing a display device, according to the defects of the pad, the repair component prints the required functional fluid on the defective pad to achieve the repair function. When there are multiple groups of repair components, multiple repair components can be used simultaneously to repair multiple defective pads, thereby improving the repair efficiency.

[0035] When the repair component prints the functional liquid, according to the position of the corresponding pad, the three-axis motion mechanism drives the electrofluidic nozzle to move to the top of the designated pad, adjusts the printing height, and finally uses the electrofluidic nozzle to print the corresponding functional liquid onto the pad. Since the electrofluidic nozzle is set vertically, the electric field force is consistent with the direction of the functional liquid spraying, and the droplets sprayed by the electrofluidic nozzle fall on the pad in a straight line. The droplets are not easily affected by horizontal forces, so the possibility of the droplets moving horizontally during the falling process is reduced, and the accuracy of the droplet landing point is improved, ensuring that the droplets are printed on the corresponding pad, ensuring the repair effect. In addition, since the real-time visual imaging component is installed at an angle, it does not interfere with the vertical installation position of the electrofluidic nozzle, and the real-time visual imaging component can still image the droplets that fall on the pad, so as to ensure that the droplets fall on the pad through imaging, thereby improving the reliability of the repair.

[0036] In a second aspect, an inkjet printing system is provided, comprising the electrofluidic repair printing device as described above.

[0037] Another embodiment of the present application provides an inkjet printing system. Since the inkjet printing system includes the above-mentioned electric fluid repair printing device, the beneficial effects of the inkjet printing system are consistent with the beneficial effects of the above-mentioned electric fluid repair printing device, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic diagram of an electrofluid repair printing device provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of another perspective of the electrofluid repair printing device provided in an embodiment of the present application;

[0041] Figure 3 A partial schematic diagram of an electrofluid repair printing device provided in an embodiment of the present application;

[0042] Figure 4 A partial schematic diagram of a repair assembly provided in an embodiment of the present application;

[0043] Figure 5 A schematic diagram of a mounting base and an electrofluidic nozzle provided in an embodiment of the present application;

[0044] Figure 6 A front view of a mounting base and an electrofluidic nozzle provided in an embodiment of the present application;

[0045] Figure 7 A partial exploded view of a mounting base and an electric fluid nozzle provided in an embodiment of the present application;

[0046] Figure 8 A partial exploded view of an electric fluid nozzle provided in an embodiment of the present application.

[0047] In the figure: 1. mounting frame; 2. seat body; 3. repair component; 31. three-axis motion mechanism; 32. electrofluid nozzle; 321. needle body; 322. spray needle; 323. electrode wire; 324. positioning block; 33. mounting seat; 33a. mounting groove; 33b. wiring hole; 34. real-time visual imaging component; 35. power supply component; 351. magnetic adsorption component; 352. electrode ring; 36. positioning sleeve; 37. limit assembly; 371. limit plate; 372. limit screw; 41. wide-angle camera; 42. high-power camera; 5. distance measuring component; 6. main lifting drive component. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0049] The embodiment of the present application provides an electrofluid repair printing device and an inkjet printing system. In the electrofluid repair printing device, the electrofluid nozzle is vertically arranged, the electric field force is consistent with the direction of the functional liquid spraying, and the droplets sprayed by the electrofluid nozzle fall on the pad in a straight line. The droplets are not easily affected by horizontal forces, so the possibility of the droplets moving in the horizontal direction during the falling process is reduced, the accuracy of the droplet landing point is improved, and the droplets are ensured to be printed on the corresponding pad, ensuring the repair effect. The present application solves the technical problems in the related art that the printing landing point is difficult to control, it is difficult to print the droplets to the desired position, the printing accuracy is poor, and the repair effect and efficiency are affected.

[0050] Reference Figure 1-Figure 3 , an electrofluid repair printing device comprises a mounting frame 1 and at least one set of repair components 3. The repair component 3 is mounted on the mounting frame 1, and the repair component 3 is suitable for printing functional liquid at the repair point. In this embodiment, the repair component 3 prints silver paste or insulating glue as needed to repair the corresponding defective pad.

[0051] Reference Figure 1-Figure 3 Furthermore, the electrofluid repair printing device also includes a base 2 and a main lifting drive 6. The base 2 is used to be installed on the driving end of the external moving mechanism, and the mounting frame 1 is lifted and slidably arranged on the base 2. The main lifting drive 6 is installed on the base 2 and is drivingly connected to the mounting frame 1 to drive the mounting frame 1 to move up and down relative to the base 2. In this embodiment, the main lifting drive 6 includes a linear motor or a screw mechanism.

[0052] This arrangement utilizes the connection between the base body 2 and the driving end of the external moving mechanism to facilitate the large-scale transfer of the repair component 3, and to move the repair component 3 to the top of the defective pad with a larger span. In addition, the main lifting drive 6 is arranged to lift the mounting frame 1 and the components on the mounting frame 1 to avoid collision with other components in the inkjet printing system when transferring the repair component 3; in addition, the main lifting drive 6 can also be used to adjust the height of the repair component 3 to the pad.

[0053] In this embodiment, the repair components 3 are provided in multiple groups, and the multiple groups of repair components 3 are installed at intervals on the mounting frame 1. Different repair components 3 can print the same or different functional liquids to achieve simultaneous repair of different defective pads, and can also achieve simultaneous repair of pads with the same defect, thereby improving the repair efficiency. Preferably, the repair components 3 are provided with two groups to accommodate the simultaneous printing of two different functional liquids, thereby reducing the load on the mounting frame 1.

[0054] Reference Figure 3 and Figure 4, wherein the repair component 3 includes a three-axis motion mechanism 31, an electrofluid nozzle 32 and a real-time visual imaging component 34. The three-axis motion mechanism 31 is installed on the mounting frame 1, and the electrofluid nozzle 32 is vertically arranged. The electrofluid nozzle 32 is installed on the driving end of the three-axis motion mechanism 31, so that the three-axis motion mechanism 31 drives the electrofluid nozzle 32 to move up and down, left and right, and forward and backward. In this embodiment, the three-axis motion mechanism 31 is assembled by three linear modules with mutually perpendicular driving directions. Specifically, the linear module includes a screw mechanism or a linear motor.

[0055] In this arrangement, according to the position of the defective pad, the three-axis motion mechanism 31 drives the electrofluidic nozzle 32 to move to the top of the designated pad, and adjusts the printing height, and finally prints the corresponding functional liquid onto the pad using the electrofluidic nozzle 32. Since the electrofluidic nozzle 32 is arranged vertically, the electric field force is consistent with the direction of the functional liquid spraying, and the droplets sprayed by the electrofluidic nozzle 32 fall onto the pad in a straight line path, and the droplets are not easily affected by horizontal forces, so the possibility of the droplets moving in the horizontal direction during the falling process is reduced, the accuracy of the droplet landing point is improved, and the droplets are ensured to be printed onto the corresponding pad, thereby ensuring the repair effect.

[0056] Reference Figure 3 and Figure 4 Specifically, the real-time visual imaging component 34 is located on one side of the electrofluid nozzle 32 and is mounted on the mounting frame 1. The imaging direction of the real-time visual imaging component 34 is inclined to the horizontal plane, and the real-time visual imaging component 34 is aligned with the landing point of the droplets ejected from the electrofluid nozzle 32. The real-time visual imaging component 34 includes a camera. The real-time visual imaging component 34 is used to image the droplets printed on the pads to determine whether they fall on the corresponding pads.

[0057] Since the real-time visual imaging component 34 is tilted and does not face the droplets directly, the droplets spread out into a circular shape after falling onto the pad. The front view of the droplets can be calculated through the tilt angle of the imaging direction of the real-time visual imaging component 34 and the imaging pattern of the droplets, so as to judge in real time whether the size of the printed droplets is qualified.

[0058] With this arrangement, since the real-time visual imaging component 34 is installed at an angle, it does not interfere with the vertical installation position of the electrofluid nozzle 32, and the real-time visual imaging component 34 can still image the droplets falling on the pad, so as to ensure that the droplets fall on the pad through imaging, thereby improving the reliability of repair.

[0059] The repair component 3 further includes a first fill light matched with the real-time visual imaging component 34, the first fill light is mounted on the mounting frame 1, and the first fill light and the real-time visual imaging component 34 are respectively located on opposite sides of the mounting seat 33. The first fill light fills the imaging position of the real-time visual imaging component 34 to ensure the amount of light entering the real-time visual imaging component 34 and improve the imaging quality.

[0060] Reference Figure 3 and Figure 4 In this embodiment, the real-time visual imaging member 34 is fixed on the mounting frame 1. In some embodiments, the mounting frame 1 is provided with a plurality of mounting positions for the real-time visual imaging member 34 to facilitate adjustment of the inclination angle of the real-time visual imaging member 34. In some embodiments, the real-time visual imaging member 34 is slidably arranged on the mounting frame 1 to adjust the inclination angle of the real-time visual imaging member 34. This ensures that the real-time imaging result of the droplet is in a high-quality state and can avoid the installation position of the electrofluid nozzle 32.

[0061] In this embodiment, the angle between the imaging direction of the real-time visual imaging element 34 and the horizontal plane is 10-30 degrees, which can ensure that the real-time imaging result of the droplets is in a usable state and avoid the installation position of the electrofluid nozzle 32.

[0062] Reference Figure 4 and Figure 5 , wherein the repair component 3 further comprises a mounting seat 33, and the mounting seat 33 is mounted on the driving end of the three-axis motion mechanism 31. A mounting groove 33a is provided on the side of the mounting seat 33, and the electrofluid nozzle 32 is mounted in the mounting groove 33a. The mounting seat 33 is used to provide an installation position for the electrofluid nozzle 32, and the mounting groove 33a is used to facilitate positioning of the installation position of the electrofluid nozzle 32. The injection end of the electrofluid nozzle 32 extends to the bottom of the mounting seat 33 to support the injection end of the electrofluid nozzle 32 to be as close to the pad as possible, thereby increasing the adjustment range of the printing height and avoiding interference of the mounting seat 33 with the adjustment of the printing height.

[0063] Preferably, the mounting base 33 is made of insulating material. Since the electrofluidic nozzle 32 needs an external voltage to generate an electric field, the insulating mounting base 33 avoids the generation of electric field crosstalk and affects the printing accuracy of the electrofluidic nozzle 32 .

[0064] Reference Figure 4 , Figure 5 and Figure 8 The electrofluid nozzle 32 includes a needle body 321, a spray needle 322 and an electrode line 323. The needle body 321 is made of a conductive material, and is used to be electrically connected to an external power supply device. The needle body 321 is installed in the installation groove 33a.

[0065] Reference Figure 4 , Figure 5 and Figure 8, the needle part 322 is connected to the needle body part 321, and the needle part 322 is made of insulating material, and the needle part 322 is located below the mounting seat 33. Specifically, the needle part 322 is plugged into the needle body part 321 to form a detachable connection between the needle part 322 and the needle body part 321, so as to facilitate the replacement of the needle part 322. The needle body part 321 is located below the mounting seat 33, so as to avoid interference with the mounting seat 33 and be as close to the pad as possible. Due to the insulating setting of the needle part 322, the functional liquid after power-on will not cause electrochemical corrosion to the needle part 322, but maintain the shape of the needle part 322, ensure the consistency of multiple printings of the needle part 322, ensure the controllable landing position of the printing, and ensure the printing accuracy.

[0066] Reference Figure 4 , Figure 5 and Figure 8 , the electrode wire 323 is inserted through the needle body 321 and the spray needle 322, and one end of the electrode wire 323 extends to the nozzle of the spray needle 322, and the electrode wire 323 is electrically connected to the needle body 321. Specifically, the electrode wire 323 is located in the middle of the needle body 321 and the spray needle 322, that is, the center lines of the electrode wire 323, the needle body 321 and the spray needle 322 are consistent. When multiple electrofluid nozzles 32 are needed, the relative positions of the electrode wire 323, the needle body 321 and the spray needle 322 are consistent, and the flight path consistency of the printed droplets is better, thereby improving the printing consistency. In addition, the electrode wire 323 extends to the nozzle of the spray needle 322 to apply a voltage at the nozzle, and the electric field force is applied to the functional liquid closer to the ejection position of the functional liquid, so that the ejected droplets are less affected by the electric field force crosstalk, thereby improving the printing accuracy.

[0067] Reference Figure 5-Figure 8 Specifically, the electrofluid nozzle 32 further includes a positioning block 324, which is made of a conductive material, and is sleeved on the needle body 321 and electrically connected to the needle body 321. The positioning block 324 is sleeved on the outside of the needle body 321, and the positioning block 324 is electrically connected to an external power supply device, so that the voltage is transmitted to the electrode line 323 by using the positioning block 324 and the needle body 321.

[0068] Reference Figure 5-Figure 7 The repair assembly 3 further includes a power supply 35, which is installed at the bottom of the installation groove 33a. In this embodiment, the power supply 35 is embedded in the bottom of the installation groove 33a to save installation space. When the fluid nozzle 32 is installed, the positioning block 324 is pressed against the power supply 35 to be electrically connected to the power supply 35, and the power supply 35 is used to be electrically connected to an external power supply device.

[0069] With this arrangement, after the electrofluid nozzle 32 is mounted on the mounting seat 33, the positioning block 324 is pressed against the power supply member 35, so that the voltage can be transmitted to the electrode line 323, thereby powering the electrofluid nozzle 32. The installation and power supply of the electrofluid nozzle 32 are integrated, which makes the operation simpler.

[0070] Reference Figure 5-Figure 7 Specifically, the power supply 35 includes a magnetic adsorption member 351 and an electrode ring 352. The positioning block 324 is made of a magnetic conductive material, and the magnetic adsorption member 351 is suitable for adsorbing the positioning block 324. The electrode ring 352 is sleeved on the magnetic adsorption member 351, and the electrode ring 352 is pressed against the positioning block 324 as the magnetic adsorption member 351 adsorbs the positioning block 324 to be electrically connected to the positioning block 324.

[0071] With this arrangement, after the electrofluidic nozzle 32 is mounted on the mounting base 33, the magnetic connection between the magnetic adsorption member 351 and the positioning block 324 ensures a stable electrical connection between the positioning block 324 and the electrode ring 352. Therefore, the voltage applied to the electrofluidic nozzle 32 is stable and is not prone to voltage fluctuations due to the connection, thereby ensuring that the electric field force applied to the functional liquid is more stable, thereby improving printing consistency.

[0072] Reference Figure 5-Figure 7 Furthermore, a wiring hole 33b is opened on the side of the mounting seat 33, and the wiring hole 33b extends to the installation position of the power supply component 35 to facilitate the electrical connection between the voltage line and the electrode ring 352 through the wiring hole 33b, thereby facilitating the electrical connection between the external power supply device and the electrode ring 352.

[0073] Reference Figure 5-Figure 7 The repair assembly 3 further includes a positioning sleeve 36, which is made of a conductive metal material. An opening is provided on the circumferential side of the positioning sleeve 36, so that the needle body 321 can enter the positioning sleeve 36 from the side of the positioning sleeve 36. After the needle body 321 enters the positioning sleeve 36, the circumferential outer side of the needle body 321 fits the positioning sleeve 36.

[0074] Reference Figure 5-Figure 7 Furthermore, the positioning sleeve 36 is embedded in the installation groove 33a, and the groove wall of the installation groove 33a is provided with a step surface, and the bottom surface of the positioning sleeve 36 is pressed against the step surface, and the step surface also positions the installation position of the positioning sleeve 36. After the needle body 321 enters the positioning sleeve 36, the positioning block 324 is located above the positioning sleeve 36. By changing the positions of the positioning block 324, the needle body 321 and the spray needle part 322, the bottom surface of the positioning block 324 is fitted with the top surface of the positioning sleeve 36, so that the positioning installation of the electrofluid nozzle 32 is realized, and it is ensured that the relative positions of the electrofluid nozzle 32 and the mounting seat 33 are consistent each time the electrofluid nozzle 32 is installed in the installation groove 33a, so as to save the time of calibrating the position of the electrofluid nozzle 32.

[0075] With this arrangement, after the needle body 321 is installed on the positioning sleeve 36, the positioning block 324 is in close contact with the positioning sleeve 36, and the needle body 321 is in close contact with the positioning sleeve 36, so as to ensure that the voltage is stably transmitted from the positioning block 324 to the needle body 321. In addition, the positioning sleeve 36 is made of metal, and its deformation ability is relatively weak. After the positioning block 324 is in close contact with the positioning sleeve 36, it is not easy to cause the positioning sleeve 36 to deform, thereby ensuring the installation accuracy of the electrofluid nozzle 32.

[0076] Furthermore, the corners of the positioning sleeve 36 are arc-shaped transitions. Since the positioning sleeve 36 is also added with voltage, the arc-shaped transitions at the corners of the positioning sleeve 36 are less likely to cause tip discharge, and the voltage at the fluid nozzle 32 is more stable, ensuring printing accuracy. In addition, the arc-shaped transition corners also facilitate the installation of the positioning sleeve 36 into the installation groove 33a.

[0077] Reference Figure 5-Figure 7 The repair component 3 further includes a limit component 37, which is used to press the electrofluid nozzle 32 tightly into the mounting groove 33a to prevent the electrofluid nozzle 32 from moving randomly or even detaching from the mounting seat 33.

[0078] Reference Figure 5-Figure 7 The limiting assembly 37 includes a limiting plate 371 and a limiting screw 372. One end of the limiting plate 371 is hinged to a side of the mounting seat 33 where the mounting groove 33a is provided, and the other end of the limiting plate 371 is fixed to the mounting seat 33 by a bolt, so that the limiting plate 371 spans the mounting groove 33a. The limiting screw 372 is threadedly penetrated through the limiting plate 371, and when the limiting plate 371 spans the mounting groove 33a, the limiting screw 372 extends to the mounting groove 33a and presses against the electrofluid nozzle 32.

[0079] In this way, after the electrofluid nozzle 32 is installed in the mounting groove 33a, the limiting plate 371 is rotated so that the limiting plate 371 crosses the mounting groove 33a, and the free end of the limiting plate 371 is fixed to the mounting seat 33, and then the limiting screw 372 is tightened so that the limiting screw 372 is pressed against the electrofluid nozzle 32. In this embodiment, the limiting screw 372 is pressed against the needle body 321. This realizes the fixation of the electrofluid nozzle 32. When the electrofluid nozzle 32 needs to be disassembled, the limiting screw 372 is loosened, and the fixed state of the free end of the limiting plate 371 is released, and the limiting plate 371 is rotated to make the limiting plate 371 away from the mounting groove 33a, so that the electrofluid nozzle 32 can be easily taken out.

[0080] Reference Figure 1-Figure 3 The electrofluid repair printing device further includes a visual detection component, including a wide-angle camera 41 and a high-magnification camera 42. The wide-angle camera 41 and the high-magnification camera 42 are both mounted on a mounting frame 1. The imaging directions of the wide-angle camera 41 and the high-magnification camera 42 are both vertically arranged to perform imaging detection on the printed droplets.

[0081] With this arrangement, after the wide-angle camera 41 and the high-magnification camera 42 are installed on the mounting frame 1, the relative positions of the wide-angle camera 41 and the high-magnification camera 42 and the electrofluid nozzle 32 on the mounting seat 33 are determined. After the pad is repaired by printing the functional liquid, the mounting frame 1 is moved, and the wide-angle camera 41 is used to image all the repaired defective pads, which not only performs preliminary inspection, but also locates the repaired defective pads, and can also determine whether there are any missed unrepaired pads. Then, the high-magnification camera 42 is used to inspect the repaired defective pads one by one to ensure the repair quality and improve the reliability of the repair.

[0082] Among them, the visual detection component also includes a second fill light and a third fill light, which are both installed on the mounting frame 1 to respectively fill light the imaging positions of the wide-angle camera 41 and the high-magnification camera 42 to improve the quality of the imaging picture.

[0083] Reference Figure 1-Figure 3 Preferably, the high-power camera 42 is arranged in the arrangement direction of the plurality of mounting seats 33 and is located in the lateral movement direction of the mounting frame 1. It should be noted that the lateral movement direction of the mounting frame 1 is the movement direction of the mounting frame 1 to horizontally move the mounting frame 1 to repair the next pad when repairing the pad. Therefore, after the electrofluidic nozzle 32 prints the droplets, as the mounting frame 1 moves so that the electrofluidic nozzle 32 moves above the next defective pad, the high-power camera 42 passes by the repaired pad and takes a front view image of the repaired pad to detect the repair effect.

[0084] In this embodiment, the high-power camera 42 is arranged between the two groups of repair components 3.

[0085] Reference Figure 1-Figure 3 The electrofluid repair printing device further comprises a distance measuring component 5, which is mounted on the mounting frame 1, and the distance measuring direction of the distance measuring component 5 is vertically arranged to determine the distance between the electrofluid nozzle 32 and the printing plane. The distance measuring component 5 can be used to determine the printing height between the ejection end of the electrofluid nozzle 32 and the pad in real time, so as to facilitate the adjustment of the height of the electrofluid nozzle 32 and prevent the electrofluid nozzle 32 from falling excessively and hitting the pad. In this embodiment, the distance measuring component 5 comprises a laser rangefinder.

[0086] The beneficial effects of the technical solution provided by this application include:

[0087] An embodiment of the present application provides an electrofluid repair printing device. When repairing a display device, according to the defects of the pad, the repair component 3 prints the required functional liquid on the defective pad to achieve the repair function. When there are multiple groups of repair components 3, multiple repair components 3 can be used simultaneously to repair multiple defective pads, thereby improving the repair efficiency.

[0088] When the repair component 3 prints the functional liquid, according to the position of the corresponding pad, the three-axis motion mechanism 31 drives the electrofluid nozzle 32 to move to the top of the designated pad, and adjusts the printing height, and finally uses the electrofluid nozzle 32 to print the corresponding functional liquid onto the pad. Since the electrofluid nozzle 32 is vertically arranged, the electric field force is consistent with the direction of the functional liquid spraying, and the droplets sprayed by the electrofluid nozzle 32 fall on the pad in a straight line path. The droplets are not easily subjected to horizontal forces, so the possibility of the droplets moving in the horizontal direction during the falling process is reduced, the accuracy of the droplet landing point is improved, and the droplets are ensured to be printed on the corresponding pad, thereby ensuring the repair effect. In addition, since the real-time visual imaging component 34 is installed at an angle, it does not interfere with the vertical installation position of the electrofluid nozzle 32, and the real-time visual imaging component 34 can still image the droplets falling on the pad, so as to ensure that the droplets fall on the pad in the form of imaging, thereby improving the reliability of the repair.

[0089] In a second aspect, an inkjet printing system is provided, comprising the electrofluidic repair printing device as described above.

[0090] Another embodiment of the present application provides an inkjet printing system. Since the inkjet printing system includes the above-mentioned electric fluid repair printing device, the beneficial effects of the inkjet printing system are consistent with the beneficial effects of the above-mentioned electric fluid repair printing device, which will not be repeated here.

[0091] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0092] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0093] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An electrofluid repair printing device, characterized in that: It includes a mounting frame and at least one set of repair components, the repair components are mounted on the mounting frame, and the repair components are suitable for printing functional liquid at the repair point, and the repair components include: A three-axis motion mechanism, the three-axis motion mechanism is mounted on the mounting frame; An electric fluid nozzle, the electric fluid nozzle is vertically arranged, and the electric fluid nozzle is installed at the driving end of the three-axis motion mechanism, so that the three-axis motion mechanism drives the electric fluid nozzle to move up and down, left and right, and forward and backward; A real-time visual imaging component is located at one side of the electrofluid nozzle and is mounted on the mounting frame. The imaging direction of the real-time visual imaging component is inclined to the horizontal plane, and the real-time visual imaging component is aligned with the landing point of the droplets ejected from the electrofluid nozzle.

2. The electrofluid repair printing device according to claim 1, characterized in that: The repair component also includes a mounting seat, which is made of insulating material and is installed on the driving end of the three-axis motion mechanism. A mounting groove is opened on the side of the mounting seat, and the electrofluid nozzle is installed in the mounting groove, and the injection end of the electrofluid nozzle extends to the bottom of the mounting seat.

3. The electrofluid repair printing device according to claim 2, characterized in that: The electric fluid nozzle comprises: A needle body, the needle body is made of a conductive material, the needle body is used to be electrically connected to an external power supply device, and the needle body is installed in the installation groove; A spray needle portion, the spray needle portion is communicated with the needle body portion, the spray needle portion is made of insulating material, and the spray needle portion is located below the mounting seat; An electrode wire is passed through the needle body and the spray needle, and one end of the electrode wire extends to the nozzle of the spray needle, and the electrode wire is electrically connected to the needle body.

4. The electrofluid repair printing device according to claim 3, characterized in that: The electrofluid nozzle further comprises a positioning block, which is made of a conductive material and is sleeved on the needle body and electrically connected to the needle body; The repair component also includes a power supply component, which is installed at the bottom of the installation groove. The positioning block is pressed against the power supply component to be electrically connected to the power supply component, and the power supply component is used to be electrically connected to an external power supply device.

5. The electrofluid repair printing device according to claim 4, characterized in that: The power supply comprises: A magnetic adsorption member, wherein the magnetic adsorption member is suitable for adsorbing the positioning block; An electrode ring is pressed against the positioning block to be electrically connected to the positioning block.

6. The electrofluid repair printing device according to claim 4, characterized in that: The repair assembly further includes a positioning sleeve, which is made of a conductive metal material, and an opening is provided on the circumferential side of the positioning sleeve so that the needle body can enter the positioning sleeve from the side of the positioning sleeve; The positioning sleeve is embedded in the installation groove, and the bottom surface of the positioning block is in contact with the top surface of the positioning sleeve.

7. The electrofluid repair printing device according to claim 6, characterized in that: The corners of the positioning sleeve are circularly transitioned.

8. The electrofluid repair printing device according to claim 2, characterized in that: The repair assembly further includes a limiting assembly, which is used to press the electric fluid nozzle tightly into the mounting groove; the limiting assembly includes: A limit plate, one end of which is hinged to a side surface of the mounting seat where the mounting groove is provided, and the other end of which is fixed to the mounting seat by bolts so that the limit plate spans the mounting groove; A limiting screw is threadedly disposed in the limiting plate, and when the limiting plate spans the mounting slot, the limiting screw extends to the mounting slot and presses against the electrofluid nozzle.

9. The electrofluid repair printing device according to claim 1, characterized in that: The angle between the imaging direction of the real-time visual imaging element and the horizontal plane is 10-30 degrees.

10. The electrofluid repair printing device according to claim 1, characterized in that: It also includes a visual detection component, which includes a wide-angle camera and a high-magnification camera. The wide-angle camera and the high-magnification camera are both installed on the mounting frame. The imaging directions of the wide-angle camera and the high-magnification camera are both set vertically to perform imaging detection on the printed droplets.

11. The electrofluid repair printing device according to claim 1, characterized in that: It also includes a distance measuring component, which is installed on the mounting frame. The distance measuring direction of the distance measuring component is vertically arranged to determine the distance between the electric fluid nozzle and the printing plane.

12. The electrofluid repair printing device according to claim 1, characterized in that: Also includes: A seat body, the seat body is used to be installed on the driving end of the external moving mechanism, and the mounting frame is lifted and slidably arranged on the seat body; A main lifting drive member is connected to the mounting frame to drive the mounting frame to move up and down relative to the seat body.

13. An inkjet printing system, characterized in that: It comprises the electrofluid repair printing device as claimed in any one of claims 1 to 12.

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