A coating device for quantum dot panels

Abstract

The application relates to a quantum dot plate coating device and relates to the technical field of quantum dot plates; the device comprises a machine body and a coating mechanism, the machine body is provided with a placing frame, a coating liquid mechanism and a control module, the placing frame is used for placing a diffusion plate, the coating liquid mechanism comprises a coating liquid rack and a driving assembly, the coating liquid rack is used for storing quantum dot liquid, a plurality of coating liquid nozzles are communicated with the bottom end of the coating liquid rack, the coating liquid rack is slidably connected with the machine body, the driving assembly is controlled by the control module, the control module drives the coating liquid rack to slide along the extension direction of the diffusion plate by controlling the driving assembly. The application has the following effects: the driving assembly can drive the coating liquid rack to slide along the extension direction of the diffusion plate, the coating liquid nozzles spray the quantum dot liquid in the coating liquid rack, the quantum dot liquid is uniformly sprayed onto the diffusion plate, and then the coating mechanism coats the surface of the diffusion plate, thereby improving the uniformity of the quantum dot liquid after coating on the diffusion plate.

Description

Technical Field

[0001] This application relates to the field of quantum dot plate technology, and in particular to a coating apparatus for quantum dot plates. Background Technology

[0002] Quantum dots are semiconductor materials with a crystalline structure composed of zinc, cadmium, selenium, and sulfur atoms, all three dimensions of which are on the nanometer scale. In quantum dots, energy levels change according to the size of the quantum dot; therefore, the band gap can be controlled by altering the quantum dot's size, thereby controlling its emission spectrum. Since quantum dots can be excited by external light sources such as LEDs to emit highly chromatic, pure-color light, their luminescence characteristics far surpass those of phosphors used in LED backlighting. Currently, quantum dot panels are an important application of quantum dot display technology.

[0003] Regarding the aforementioned technologies, most existing coating methods involve directly pouring quantum dot liquid onto one end of the diffuser plate surface, and then gradually coating the surface of the diffuser plate with quantum dot liquid using a roller. However, since the roller gradually moves from one end of the substrate coated with quantum dot liquid to the other end and achieves coating by reciprocating movement, this easily leads to uneven distribution of quantum dot liquid on the diffuser plate. Summary of the Invention

[0004] To improve the uniformity of quantum dot liquid coating on a diffusion plate, this application provides a coating apparatus for a quantum dot plate.

[0005] This application provides a coating device for quantum dot plates, which adopts the following technical solution: A coating apparatus for a quantum dot plate includes a body and a coating mechanism. The body is provided with a placement frame, a coating mechanism, and a control module. The placement frame is used to place the diffusion plate. The coating mechanism includes a coating rack and a driving component. The coating rack is used to store quantum dot liquid. A plurality of coating nozzles are connected to the bottom end of the coating rack. The coating rack is slidably connected to the body. The driving component is controlled by the control module. The control module drives the coating rack to slide along the extension direction of the diffusion plate by controlling the driving component.

[0006] By adopting the above technical solution, compared with the prior art of directly pouring quantum dot liquid onto one end of the substrate surface, the coating mechanism of this application allows the operator to drive the drive component through the control module, thereby causing the drive component to move the coating rack along the extension direction of the diffuser plate. During this process, the coating nozzle sprays out the quantum dot liquid in the coating rack, so that the quantum dot liquid is evenly sprayed onto the diffuser plate. After the spraying is completed, the surface of the diffuser plate is coated by the coating mechanism, so that the quantum dot liquid on the surface of the diffuser plate is evenly distributed, thereby improving the uniformity of the quantum dot liquid coating on the diffuser plate.

[0007] Preferably, the top wall of the placement frame is provided with a placement groove, and the placement frame is also provided with a transportation mechanism. The transportation mechanism includes a lifting component and a pushing component. The lifting component includes a lifting frame and a lifting member. The lifting frame is located in the placement groove, and the diffuser plate is placed on the lifting frame and located in the placement groove. The lifting frame is slidably connected to the placement frame. The lifting member is used to drive the lifting frame to move upward and push one end of the diffuser plate out of the placement frame through the pushing component.

[0008] By adopting the above technical solution, the placement trough and the conveying mechanism are designed so that the diffuser plate can be placed in the placement trough. This allows the interior of the placement trough to prevent the diffuser plate from shifting when the coating roller coats the diffuser plate. At the same time, the presence of the conveying mechanism allows the lifting frame to move the coated diffuser plate out of the placement trough and push one end of the diffuser plate out of the placement frame through the pushing component.

[0009] Preferably, the lifting assembly further includes an active component, which includes a lifting cam. The active component drives the lifting cam to rotate, and the top end of the active cam abuts against the bottom end of the lifting frame. The pushing assembly includes a linkage frame and a linkage component. The lifting cam drives the linkage frame to move through the linkage component, and the diffuser plate is located on the displacement path of the linkage frame.

[0010] By adopting the above technical solution and specifically configuring the lifting component and the pushing component, the active cam rotates under the drive of the active component, thereby pushing the lifting frame to move upward and simultaneously driving the linkage frame to slide, thereby pushing the diffuser plate on the lifting frame to slide. At the same time, the lifting frame can continue to maintain its lifted state during this process, thereby reducing the probability of interference between the lifting frame and the linkage frame.

[0011] Preferably, the linkage includes a track frame, a pusher frame, a rotating wheel, a linkage rod, and a linkage sleeve. The linkage frame is slidably connected to the track frame, the track frame is slidably connected to the machine body, the pusher frame is rotatably connected to the linkage frame, and the rotating wheel is rotatably connected to the pusher frame. The machine body has a clearance groove, the end of which is away from the diffuser plate is bent downwards. The rotating wheel is embedded in the clearance groove and is in contact with the inner wall of the clearance groove. The linkage sleeve is connected to a lifting cam, the linkage sleeve is sleeved on the linkage rod, and is slidably connected to the linkage rod. The linkage rod is rotatably connected to the linkage frame.

[0012] By adopting the above technical solution and specifically setting the linkage components, when the active component drives the active cam to rotate, the linkage sleeve can drive the linkage rod to rotate, thereby causing the linkage rod to push the linkage frame to move. Under the action of the rotating wheel and the clearance groove, it slides along the trajectory of the clearance groove. The existence of the clearance groove ensures that during the initial period when the active component drives the active cam to rotate, i.e. when the lifting frame is not fully raised, the linkage frame and the push frame can always be located in the lower half of the clearance groove, thereby reducing the probability that the push frame will contact the diffuser plate before the lifting frame is fully raised.

[0013] Preferably, the control module is electrically connected to a uniformity detection module, which is used to detect the actual uniformity of the quantum dot liquid application on the diffusion plate; the control module includes a uniformity comparison unit, which is used to compare the actual uniformity of the quantum dot liquid application on the diffusion plate with a preset uniformity; the machine body is also provided with a conveyor belt, which is located on the side of the placement frame away from the storage rack; the active component is electrically connected to the control module, and the control module is used to control the active component when the actual uniformity of application is greater than or equal to the preset uniformity of application, so that the diffusion plate is pushed onto the conveyor belt.

[0014] By adopting the above technical solution, the uniformity detection module and the uniformity comparison unit are configured so that the uniformity comparison unit can compare the actual uniformity of the quantum dot liquid coating on the diffusion plate with the preset uniformity, thereby determining whether the uniformity of the quantum dot liquid on the diffusion plate meets the standard. When the standard is met, the control module can control the operation of the active component, thereby causing the pushing component to push one end of the diffusion plate that meets the standard onto the conveyor belt, and the conveyor belt will then transport the diffusion plate to the next process.

[0015] Preferably, the control module is also electrically connected to a position detection module, which is used to detect whether the diffuser plate pushed by the pusher has slid to a designated position; the active component is electrically connected to the control module, which is used to control the active component to return to the initial position when the diffuser plate slides to the designated position.

[0016] By adopting the above technical solution and setting the position detection module, the position detection module can detect whether the diffuser plate has been pushed to the designated position. When the diffuser plate is pushed to the designated position, the control module can control the active component to return to the initial position, thereby allowing the lifting frame to return to the placement slot, and the linkage frame and the push frame to be located below the lifting frame again.

[0017] Preferably, the coating mechanism includes a coating roller, a coating frame, and a coating assembly. The coating assembly includes a coating linear motor, which drives the coating frame to move. The coating roller is disposed on the coating frame and abuts against the top wall of the diffusion plate on the placement frame.

[0018] By adopting the above technical solution and specifically setting the coating mechanism, when the diffusion plate is placed on the placement frame and the coating mechanism has completed the coating, the coating frame can move under the drive of the coating linear motor, thereby driving the coating roller to coat the top wall of the diffusion plate, thus achieving the coating of the diffusion plate.

[0019] Preferably, the bottom end of the coating rack is slidably connected to a sliding frame, and the coating rack is also provided with an adjusting component. The adjusting component adjusts the height of the sliding frame by driving the sliding frame to slide. The bottom end of the sliding frame is also provided with a buffer frame and a buffer spring. The buffer frame and the sliding frame are slidably connected, and the buffer spring is located between the buffer frame and the sliding frame. The coating roller is rotatably connected to the buffer frame.

[0020] By adopting the above technical solution, the adjustment component is designed to drive the sliding frame to slide, thereby adjusting the height of the coating roller on the sliding frame and adapting to diffusion plates of different thicknesses. At the same time, the buffer plate and buffer spring can buffer the coating roller and the diffusion plate, thereby reducing the probability of the coating roller damaging the diffusion plate.

[0021] Preferably, the control module is also electrically connected to a second pressure detection module, which is used to detect the pressure value of the pressure applied by the buffer spring to the buffer frame; the adjusting component is electrically connected to the control module, and the control module is used to control the adjusting component based on the pressure value to adjust the pressure applied by the coating roller to the diffuser plate.

[0022] By adopting the above technical solution and setting the second pressure detection module, the second pressure detection module can detect the pressure value of the pressure applied by the buffer spring to the buffer frame, and adjust the displacement of the sliding frame based on the pressure value, thereby adjusting the pressure applied by the coating roller to the diffuser plate, thereby reducing the probability of the diffuser plate being damaged due to excessive pressure applied by the coating roller to the diffuser plate, thus effectively protecting the diffuser plate.

[0023] Preferably, the machine body is provided with a storage rack, and the control module is electrically connected to a first pressure detection module, which is used to detect the pressure value of the pressure at the bottom of the storage rack; the control module also includes a pressure difference calculation unit, which is used to calculate the pressure difference between the detected pressure value and a preset pressure value; several diffusion plates to be coated are stacked on the storage rack, and the control module is electrically connected to a placement robot, which is used to control the placement robot based on the pressure difference to place the topmost diffusion plate on the storage rack onto the placement frame.

[0024] By adopting the above technical solution, the setting of the first pressure detection module and the pressure difference calculation unit enables the control module to calculate the actual height of the top wall of the top diffuser plate on the storage rack based on the pressure difference. This allows the control robot to pick up the top diffuser plate based on the actual height and place it on the placement frame, thus completing the placement of the diffuser plate.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The design of the coating mechanism allows the operator to drive the drive component through the control module, thereby causing the drive component to move the coating rack along the extension direction of the diffuser plate. During this process, the coating nozzle sprays out the quantum dot liquid in the coating rack, so that the quantum dot liquid is evenly sprayed onto the diffuser plate. After the spraying is completed, the coating mechanism then coats the surface of the diffuser plate, so that the quantum dot liquid on the surface of the diffuser plate is evenly distributed, thereby improving the uniformity of the quantum dot liquid coating on the diffuser plate. 2. The placement trough and the transport mechanism are designed so that the diffuser plate can be placed in the placement trough. This prevents the diffuser plate from shifting when the coating roller coats the diffuser plate. At the same time, the transport mechanism allows the lifting frame to move the coated diffuser plate out of the placement trough and pushes one end of the diffuser plate out of the placement frame through the pushing component. 3. The uniformity detection module and uniformity comparison unit are configured so that the uniformity comparison unit can compare the actual uniformity of the quantum dot liquid coating on the diffusion plate with the preset uniformity, thereby determining whether the uniformity of the quantum dot liquid on the diffusion plate meets the standard. When the standard is met, the control module can control the operation of the active component, thereby causing the pushing component to push one end of the diffusion plate that meets the standard onto the conveyor belt, and the conveyor belt will then transport the diffusion plate to the next process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall coating device for the quantum dot plate in the embodiments of this application.

[0027] Figure 2 This is a schematic diagram illustrating the structure of the coating mechanism in the embodiments of this application.

[0028] Figure 3 This is a structural block diagram showing the electrical connection of the control module in an embodiment of this application.

[0029] Figure 4 This is a structural schematic diagram illustrating the lifting component in the embodiments of this application.

[0030] Figure 5 This is a schematic diagram illustrating the structure of the rotating wheel in the embodiments of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Body; 11. Storage rack; 12. Placement robot; 13. Conveyor belt; 14. Mounting frame; 141. Clearance groove; 2. Coating mechanism; 21. Coating roller; 22. Coating rack; 23. Coating assembly; 231. Coating linear motor; 24. Sliding frame; 25. Adjusting component; 26. Buffer frame; 27. Buffer spring; 3. Placement frame; 31. Placement groove; 4. Coating mechanism; 41. Coating rack; 42. Drive assembly; 421. Drive linear motor; 43. Coating nozzle; 5. Control system; 51. Control module; 51 1. Pressure difference calculation unit; 512. Uniformity comparison unit; 52. First pressure test module; 53. Second pressure detection module; 54. Uniformity detection module; 55. Position detection module; 6. Diffuser plate; 7. Transport mechanism; 71. Lifting assembly; 711. Lifting frame; 712. Lifting component; 7121. Lifting cam; 713. Driving component; 72. Pushing assembly; 721. Linkage frame; 722. Linkage component; 7221. Track frame; 7222. Pushing frame; 7223. Rotating wheel; 7224. Linkage rod; 7225. Linkage sleeve. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a coating apparatus for quantum dot plates. (Refer to...) Figure 1 , Figure 2 and Figure 3 The diffusion plate coating device includes a body 1 and a coating mechanism 2. The body 1 is equipped with a placement frame 3, a coating mechanism 4, and a control system 5. The control system 5 includes a control module 51. The placement frame 3 is used to place the diffusion plate 6. The coating mechanism 4 includes a coating rack 41 and a drive assembly 42. The coating rack 41 is used to store quantum dot liquid. Several coating nozzles 43 are connected to the bottom end of the coating rack 41. The coating rack 41 is slidably connected to the body 1. The drive assembly 42 is controlled by the control module 51. The control module 51 drives the coating rack 41 to slide along the length of the diffusion plate 6 by controlling the drive assembly 42.

[0034] Reference Figure 1 and Figure 2 A storage rack 11 is also provided at one end of the body 1 along the length of the placement frame 3. The storage rack 11 extends vertically upward, and its bottom end is fixedly connected to the body 1 by bolts. Several diffusion plates 6 are vertically stacked inside the storage rack 11. A placement robot 12 is also fixedly installed on the body 1 by bolts. A placement slot 31 is provided on the top wall of the placement frame 3. A conveyor belt 13 is also provided on the body 1. The conveyor belt 13 is located on the side of the placement frame 3 away from the storage rack 11, and is used to transport the diffusion plates 6 on the placement frame 3.

[0035] Reference Figure 1 , Figure 2 and Figure 3 The robot 12 is controlled by the control module 51. The control module 51 is electrically connected to a first pressure detection module 52, which is optionally a pressure sensor. The control module 51 is a PLC controller, and the pressure sensor is embedded at the bottom of the storage rack 11 and in contact with the bottom wall of the diffuser plate 6 located at the bottom of the storage rack 11. The pressure sensor and the PLC controller are existing technologies and will not be described in detail here.

[0036] Reference Figure 1 , Figure 2 and Figure 3 The first pressure detection module 52 is used to detect the pressure value it receives, that is, the pressure value received by the bottom wall of the placement frame 3, and feeds the pressure value back to the control module 51. The control module 51 is used to receive the pressure value. The control module 51 includes a pressure difference calculation unit 511. The control module 51 stores a first preset pressure value in advance. Optionally, the first preset pressure value is the gravity value of a single diffuser plate 6.

[0037] Reference Figure 1 , Figure 2 and Figure 3 The pressure difference calculation unit 511 is used to calculate the difference between the actual pressure value detected by the first pressure detection module and the first preset pressure value to obtain the pressure difference value. After obtaining the pressure difference value, the control module 51 divides the difference value by the preset pressure value to obtain a quantity value, and selects the integer value closest to the quantity value. At this time, the integer value is the number of diffuser plates 6 stacked on the storage rack 11.

[0038] Reference Figure 1 , Figure 2 and Figure 3 Then, the control module 51 calculates the height of the top wall of the topmost diffuser plate 6 by multiplying the number by the thickness of a single diffuser plate 6. Based on this height, the control module 51 controls the placement robot 12 to pick up the diffuser plate 6 located at the highest position of the stacked diffuser plates 6 and move the diffuser plate 6 into the placement slot 31.

[0039] Reference Figure 1 and Figure 2 The drive assembly 42 includes a linear motor 421, which is fixedly connected to the placement frame 3 by bolts. The sliding direction of the moving part of the linear motor 421 is along the length direction of the placement frame 3. The moving part of the linear motor 421 is also fixedly connected to the coating holder 41 by bolts. The coating nozzle 43 communicates with the chamber inside the coating holder 41, and the spraying direction of the coating nozzle 43 is vertically downward.

[0040] Reference Figure 1 and Figure 2 The coating mechanism 2 includes a coating roller 21, a coating frame 22, and a coating assembly 23. The coating assembly 23 includes a coating linear motor 231, which is fixedly mounted on the placement frame 3 by bolts and a bracket. The sliding direction of the stator of the coating linear motor 231 is along the length of the placement frame 3. The coating frame 22 is fixedly connected to the stator of the coating linear motor 231, and the coating frame 22 is slidably connected to the placement frame 3.

[0041] Reference Figure 1 and Figure 2 A sliding frame 24 is also provided at the bottom of the coating rack 22. The sliding frame 24 is slidably connected to the coating rack 22, and the sliding direction of the sliding frame 24 is vertical. An adjusting component 25 is also provided on the coating rack 22. Optionally, the adjusting component 25 is an electric telescopic rod. The top end of the adjusting component 25 is fixedly connected to the coating rack 22 by bolts, and the front joint of the adjusting component 25 is fixedly connected to the sliding frame 24 by bolts.

[0042] Reference Figure 1 and Figure 2 A buffer frame 26 and a buffer spring 27 are also provided at the bottom end of the sliding frame 24. The buffer frame 26 is slidably connected to the sliding frame 24, and the sliding direction of the buffer frame 26 is vertical. Two buffer springs 27 are provided, each sleeved on the buffer frame 26. The top end of each buffer spring 27 abuts against the sliding frame 24, and the bottom end of each buffer spring 27 abuts against the buffer frame 26. The coating roller 21 is mounted on the buffer frame 26 and is rotatably connected to the buffer frame 26 via a bearing. The bottom end of the coating roller 21 abuts against the top wall of the diffuser plate 6 on the placement frame 3.

[0043] Reference Figure 1 , Figure 2 and Figure 3 The control module 51 is also electrically connected to a second pressure detection module 53. Optionally, the second pressure detection module 53 is a pressure sensor, which is installed on the top wall of the buffer frame 26 and in contact with a buffer spring 27. The second pressure detection module 53 is used to detect the pressure value applied by the buffer spring 27 to itself and feeds the pressure value back to the control module 51.

[0044] Reference Figure 1 , Figure 2 and Figure 3The adjusting component 25 is electrically connected to the control module 51. The control module 51 stores a second preset pressure value in advance. The control module 51 is used to receive the pressure value fed back by the second pressure detection module 53 and compare the pressure value with the second preset pressure value. When the pressure value is greater than or equal to the second preset pressure value, the control module 51 controls the adjusting component 25 to stop driving the sliding frame 24 to move downward, so as to reduce the phenomenon that the coating roller 21 is damaged due to excessive pressure on the diffuser plate 6.

[0045] Reference Figure 2 and Figure 4 The machine body 1 is also equipped with a transport mechanism 7, which includes a lifting assembly 71 and a pushing assembly 72. The lifting assembly 71 includes a lifting frame 711, a lifting component 712, and an active component 713. The lifting component 712 includes a lifting cam 7121. Optionally, the active component 713 is a servo motor. The active component 713 is fixedly installed on the machine body 1 by bolts and brackets, and the active component 713 is located below the lifting frame 711.

[0046] Reference Figure 2 and Figure 4 The lifting cam 7121 is fixedly sleeved on the output shaft of the active component 713. The top end of the lifting cam 7121 is lowered to the bottom end of the lifting frame 711. The lifting frame 711 is slidably connected to the body 1. The sliding direction of the lifting frame 711 is vertical. The top end of the lifting frame 711 extends into the placement groove 31. The diffuser plate 6 is placed on the top wall of the lifting frame 711 and located in the placement groove 31.

[0047] Reference Figure 2 , Figure 4 and Figure 5 The machine body 1 is also equipped with a mounting bracket 14, which is located below the lifting frame 711. The mounting bracket 14 is fixedly connected to the machine body 1 by welding. A clearance groove 141 is provided on the side wall of the mounting bracket 14, and the end of the clearance groove 141 away from the conveyor belt 13 is bent vertically downward. The pushing assembly 72 includes a linkage frame 721 and a linkage component 722. The linkage component 722 includes a track frame 7221, a pushing frame 7222, a rotating wheel 7223, a linkage rod 7224, and a linkage sleeve 7225.

[0048] Reference Figure 2 , Figure 4 and Figure 5The linkage sleeve 7225 is fixedly connected to the lifting cam 7121 by bolts. The linkage sleeve 7225 is sleeved on one end of the linkage rod 7224 and is slidably connected to the linkage rod 7224. The other end of the linkage rod 7224 is rotatably connected to the linkage frame 721 by a pin. The linkage frame 721 is sleeved on the track frame 7221 and is slidably connected to the track frame 7221. The sliding direction of the linkage frame 7221 relative to the track frame 7221 is vertical. The track frame 7221 is slidably connected to the mounting frame 14 through a slide rail. The sliding direction of the track frame 7221 is the length direction of the placement frame 3.

[0049] Reference Figure 2 , Figure 4 and Figure 5 One end of the pusher 7222 passes through the linkage 721 and is rotatably connected to the mounting frame 14 via a bearing. One end of the pusher 7222 extends out of the mounting frame 14. Optionally, the number of rotating wheels 7223 is set to two. Both rotating wheels 7223 are rotatably connected to the pusher 7222 via bearings. Both rotating wheels 7223 are located in the clearance groove 141 and abut against the inner side wall of the clearance groove 141.

[0050] Reference Figure 2 , Figure 4 and Figure 5 In the initial state, the base circle radius of the lifting cam 7121 abuts against the bottom end of the lifting frame 711. When the output shaft of the driving member 713 rotates, the lifting cam 7121 rotates and drives the lifting frame 711 to rise slowly. The rise of the lifting frame 711 drives the diffuser plate 6 to rise. When the lifting frame 711 rises to its highest point, the radius of the point where the lifting cam 7121 abuts against the bottom end of the lifting frame 711 remains unchanged and is maintained for a certain period of time, so that the lifting frame 711 remains in a raised state.

[0051] Reference Figure 2 , Figure 4 and Figure 5 During this process, the rotation of the lifting cam 7121 drives the rotation of the linkage sleeve 7225, thereby causing the linkage rod 7224 to shift. At this time, the pusher 7222 and the mounting frame 14 remain relatively stationary and slide upward together along the length of the track frame 7221. When the lifting frame 711 rises to its highest point, both rotating wheels 7223 are located at the corner of the clearance groove 141. At this time, the rotating wheels 7223 drive the pusher 7222 to rotate relative to the linkage frame 721, so that the top of one end of the pusher 7222 is higher than the top of the diffuser plate 6 on the lifting frame 711.

[0052] Reference Figure 2 , Figure 4 and Figure 5Subsequently, the pusher 7222 and the linkage 721 drive the track frame 7221 to slide along the length of the placement frame 3. During this process, the pusher 7222 gradually comes into contact with the diffuser plate 6 and pushes the diffuser plate 6 to slide towards the conveyor belt 13, causing most of the diffuser plate 6 to slide onto the conveyor belt 13, so that the conveyor belt 13 can transport the diffuser plate 6 completely onto itself and transport it.

[0053] Reference Figure 2 and Figure 3 The control module 51 is also electrically connected to a uniform detection module 54. Optionally, the uniform detection module 54 consists of multiple ultrasonic ranging sensors, each mounted on the top of the placement frame 3. The ultrasonic ranging sensors are used to measure the total time of ultrasonic waves propagating and reflecting from themselves to the quantum dot liquid on the diffuser plate 6, and feed back the value of this total time to the control module 51.

[0054] Reference Figure 2 and Figure 3 The control module 51 includes a uniformity comparison unit 512. The control module 51 stores a preset duration. The uniformity comparison unit 512 is used to compare the total duration measured by each ultrasonic ranging sensor with the preset duration. The control module 51 pre-sets a preset coating uniformity where the total duration measured by each ultrasonic ranging sensor is greater than or equal to the preset duration.

[0055] Reference Figure 2 and Figure 3 When the total duration measured by the ultrasonic ranging sensor exceeds the preset duration, the control module 51 considers the actual uniformity of the quantum dot liquid coating on the diffusion plate 6 to be less than the preset uniformity. At this time, the control module 51 controls the rotating component to rotate, driving the coating roller 21 to coat the surface of the diffusion plate 6 again. Otherwise (i.e., when each measured total duration is less than or equal to the preset duration), the actual uniformity is considered to be greater than or equal to the preset uniformity. At this time, the control module 51 controls the driving component 713 to rotate, so that the diffusion plate 6 is pushed onto the conveyor belt 13.

[0056] Reference Figure 1 and Figure 3 The control module 51 is also electrically connected to a position detection module 55. Optionally, the position detection module 55 is an infrared rangefinder, which is mounted on the body 1 and located on the side of the placement frame 3 near the conveyor belt 13. The infrared rangefinder is used to measure the time it takes for the infrared light emitted by itself to be reflected back after being blocked by an object.

[0057] Reference Figure 1 , Figure 3 and Figure 5The control module 51 calculates the actual distance to the object being measured based on the speed of the infrared rays and the measured duration. The control module 51 stores a preset distance value, which is the distance to the diffuser plate 6 measured by the infrared rangefinder. When the measured actual distance value is less than or equal to the preset distance value, it is considered that the diffuser plate 6 has moved to the designated position. At this time, the control module 51 controls the active member 713 to rotate, so that the active member 713 returns to the initial position.

[0058] The implementation principle of the quantum dot plate coating device in this application embodiment is as follows: In use, the placement robot 12 moves the diffusion plate 6 in the storage rack 11 to the top of the lifting rack 711. Then, the drive assembly 42 drives the coating rack 41 to slide along the length direction of the diffusion plate 6, while the coating nozzle 43 sprays quantum dot liquid onto the surface of the diffusion plate 6. After the spraying is completed, the coating assembly 23 drives the coating roller 21 to coat the surface of the diffusion plate 6. After the coating is completed, the uniformity detection module 54 detects the uniformity of the quantum dot liquid on the diffusion plate 6. After the detected uniformity reaches the standard, the transport mechanism 7 drives the diffusion plate 6 to slide onto the conveyor belt 13, and the conveyor belt 13 then transports the diffusion plate 6.

[0059] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A coating apparatus for quantum dot plates, comprising a body (1) and a coating mechanism (2), characterized in that: The body (1) is provided with a placement frame (3), a coating mechanism (4) and a control module (51). The placement frame (3) is used to place the diffusion plate (6). The coating mechanism (4) includes a coating rack (41) and a drive assembly (42). The coating rack (41) is used to store quantum dot liquid. Several coating nozzles (43) are connected to the bottom end of the coating rack (41). The coating rack (41) is slidably connected to the body (1). The drive assembly (42) is controlled by the control module (51). The control module (51) drives the coating rack (41) to slide along the extension direction of the diffusion plate (6) by controlling the drive assembly (42). The top wall of the placement frame (3) is also provided with a placement groove (31), and the placement frame (3) is also provided with a transport mechanism (7). The transport mechanism (7) includes a lifting component (71) and a pushing component (72). The lifting component (71) includes a lifting frame (711) and a lifting member (712). The lifting frame (711) is located in the placement groove (31). The diffuser plate (6) is placed on the lifting frame (711) and located in the placement groove (31). The lifting frame (711) is slidably connected to the placement frame (3). The lifting member (712) is used to drive the lifting frame (711) to move upward and push one end of the diffuser plate (6) out of the placement frame (3) through the pushing component (72). The lifting assembly (71) further includes an active component (713), the lifting component (712) includes a lifting cam (7121), the active component (713) is used to drive the lifting cam (7121) to rotate, the top end of the active cam abuts against the bottom end of the lifting frame (711), the pushing assembly (72) includes a linkage frame (721) and a linkage component (722), the lifting cam (7121) drives the linkage frame (721) to move through the linkage component (722), and the diffuser plate (6) is located on the displacement path of the linkage frame (721); The linkage component (722) includes a track frame (7221), a pusher frame (7222), a rotating wheel (7223), a linkage rod (7224), and a linkage sleeve (7225). The linkage frame (721) is slidably connected to the track frame (7221), the track frame (7221) is slidably connected to the machine body (1), the pusher frame (7222) is rotatably connected to the linkage frame (721), and the rotating wheel (7223) is rotatably connected to the pusher frame (7222). The machine body (1) has an opening... The clearance groove (141) is bent downward at one end away from the diffuser plate (6). The rotating wheel (7223) is embedded in the clearance groove (141) and is in contact with the inner wall of the clearance groove (141). The linkage sleeve (7225) is connected to the lifting cam (7121). The linkage sleeve (7225) is sleeved on the linkage rod (7224) and is slidably connected to the linkage rod (7224). The linkage rod (7224) is rotatably connected to the linkage frame (721).

2. The coating apparatus for a quantum dot plate according to claim 1, characterized in that: The control module (51) is electrically connected to a uniformity detection module (54), which is used to detect the actual uniformity of the quantum dot liquid on the diffusion plate (6). The control module (51) includes a uniformity comparison unit (512), which is used to compare the actual uniformity of the quantum dot liquid on the diffusion plate (6) with a preset uniformity. The body (1) is also provided with a conveyor belt (13), which is located on the side of the placement frame (3) away from the storage rack (11). The active component (713) is electrically connected to the control module (51), which is used to control the active component (713) when the actual uniformity is greater than or equal to the preset uniformity, so that the diffusion plate (6) is pushed onto the conveyor belt (13).

3. The coating apparatus for a quantum dot plate according to claim 1, characterized in that: The control module (51) is also electrically connected to a position detection module (55), which is used to detect whether the diffuser plate (6) pushed by the pusher (7222) has slid to a designated position; the active member (713) is electrically connected to the control module (51), which is used to control the active member (713) to return to the initial position when the diffuser plate (6) slides to the designated position.

4. The coating apparatus for a quantum dot plate according to claim 1, characterized in that: The coating mechanism (2) includes a coating roller (21), a coating frame (22) and a coating assembly (23). The coating assembly (23) includes a coating linear motor (231), which is used to drive the coating frame (22) to move. The coating roller (21) is disposed on the coating frame (22) and abuts against the top wall of the diffuser plate (6) on the placement frame (3).

5. The coating apparatus for a quantum dot plate according to claim 4, characterized in that: The bottom end of the coating rack (22) is also slidably connected to a sliding frame (24). The coating rack (22) is also provided with an adjusting component (25). The adjusting component (25) adjusts the height of the sliding frame (24) by driving the sliding frame (24) to slide. The bottom end of the sliding frame (24) is also provided with a buffer frame (26) and a buffer spring (27). The buffer frame (26) is slidably connected to the sliding frame (24). The buffer spring (27) is located between the buffer frame (26) and the sliding frame (24). The coating roller (21) is rotatably connected to the buffer frame (26).

6. The coating apparatus for a quantum dot plate according to claim 5, characterized in that: The control module (51) is also electrically connected to a second pressure detection module (53), which is used to detect the pressure value of the pressure applied by the buffer spring (27) to the buffer frame (26); the adjusting member (25) is electrically connected to the control module (51), which is used to control the adjusting member (25) based on the pressure value to adjust the pressure applied by the coating roller (21) to the diffuser plate (6).

7. The coating apparatus for a quantum dot plate according to claim 1, characterized in that: The body (1) is provided with a storage rack (11), and the control module (51) is electrically connected to a first pressure detection module (52). The first pressure detection module (52) is used to detect the pressure value of the pressure at the bottom of the storage rack (11). The control module (51) also includes a pressure difference calculation unit (511), which is used to calculate the pressure difference between the detected pressure value and the preset pressure value. Several diffusion plates (6) to be coated are stacked on the storage rack (11). The control module (51) is electrically connected to a placement robot (12). The control module (51) is used to control the placement robot (12) based on the pressure difference to place the diffusion plate (6) at the top of the storage rack (11) on the placement frame (3).

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