OLED electronic display screen production conveying device

Abstract

The invention belongs to the technical field of display screen conveying, and particularly relates to an OLED electronic display screen production conveying device which comprises a suspension conveying table, a sliding block and a vacuum adsorption platform, and the vacuum adsorption platform comprises a porous adsorption panel, a base, a vacuum disc, a pressure acquisition module, a displacement acquisition module, a vibration acquisition module and a control module. A plurality of vacuum cavities are arranged in the vacuum disc, are independently controlled in different areas and are connected with the vacuum pump through an executing mechanism, and the executing mechanism is an electromagnetic valve group. In the invention, through the unique design of the porous adsorption panel and the combination of the PID algorithm for the operation of the pressure acquisition module and the control module, the vacuum degree needing to be maintained is accurately calculated and dynamically adjusted according to the quality, the contact area, the surface friction coefficient and other parameters of the OLED screen, the adsorption force can be accurately controlled, and the display screen can be stably adsorbed in the conveying process; and no damage is caused, so that the yield of products is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen conveying, and in particular to an OLED electronic display screen production conveying device. Background Art

[0002] In the production process of OLED electronic display screens, the conveying link of the display screen is crucial. Traditional conveying devices have many problems when facing thin, high-precision products such as OLED display screens. On the one hand, it is difficult to accurately control the adsorption force of ordinary adsorption conveying methods, which can easily damage the display screen due to excessive adsorption force, or cause the display screen to shift or even fall during the conveying process due to insufficient adsorption force. On the other hand, the vibration in the production environment and the horizontal deviation of the display screen itself during transportation will have a negative impact on the quality of the display screen, such as causing damage to pixels and uneven display effects.

[0003] As OLED electronic displays develop towards larger size, thinner weight, and higher resolution, more stringent requirements are placed on the performance of production conveying devices. Developing a conveying device that can accurately control the adsorption force has become an urgent problem to be solved in the industry. Summary of the invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes an OLED electronic display production and conveying device.

[0005] The present invention proposes an OLED electronic display production and conveying device, including a suspension conveying platform, a slider and a vacuum adsorption platform, wherein the vacuum adsorption platform includes a porous adsorption panel, a base, a vacuum plate, a pressure acquisition module, a displacement acquisition module, a vibration acquisition module and a control module, wherein a plurality of vacuum cavities are arranged in the vacuum plate, and the plurality of vacuum cavities are independently controlled in different regions, and a vacuum pump (limit vacuum degree ≤ 10^-3mbar) is connected through an actuator, and the actuator is a solenoid valve group; a pressure acquisition module is installed inside each vacuum cavity to monitor the vacuum degree in real time (range -100kPa to 0kPa, accuracy ±0.1%FS); the displacement acquisition module can be a position The displacement sensor (such as laser triangulation reflection type) is installed at the edge of the vacuum adsorption platform (the four corners of the vacuum adsorption platform and the midpoint of the long side) to detect the horizontal offset of the screen (resolution 1μm). There are 6 sensors in total, 10mm away from the edge of the platform; the vibration acquisition module can be a vibration sensor (such as a piezoelectric accelerometer), which is installed at the connection of the conveying device bracket (the four rigid connection points between the conveying device bracket and the ground / machine platform) to monitor the vibration frequency (bandwidth 0.5-5000Hz); the control module is installed on one side of the suspended conveyor platform, and the main control unit (PLC or industrial PC) runs the PID algorithm to dynamically adjust the vacuum pump power and the opening of the solenoid valve group, thereby adjusting the vacuum degree.

[0006] Preferably, the porous adsorption panel is made of silicon nitride ceramics with a pore size of 50-200 μm and a surface covered with an antistatic layer (surface resistance ≤ 10^6Ω), thereby reducing wear on the screen.

[0007] Preferably, a first groove and a second groove are provided inside the base, the vacuum plate and the porous adsorption panel are both fixed in the first groove, and the vacuum plate is located below the porous adsorption panel.

[0008] Preferably, the solenoid valve group includes a main pipeline, a buffer tank and multiple solenoid valves, the buffer tank is connected to the vacuum pump, the main pipeline is connected to the buffer tank, the main pipeline is connected to the corresponding vacuum chamber through multiple branch pipes, and the solenoid valves are installed on the corresponding branch pipes.

[0009] Preferably, the buffer tank and the vacuum pump are both installed in the second groove, the main pipeline crosses the first groove and the second groove, and a cover plate sealing the second groove is fixed above the vacuum pump.

[0010] Preferably, the vacuum adsorption platform is located above the slider, and two mounting blocks are provided at the bottom of the base. A pair of mounting holes are respectively provided at the connecting parts of the mounting blocks and the base. The base is fixed to the slider by multiple bolts threaded in the mounting holes, thereby facilitating the installation of the vacuum adsorption platform on the slider.

[0011] Preferably, the control logic of the dynamic adjustment of vacuum degree is as follows: 1. Input parameters: Calculate the required adsorption force and vacuum degree through the formula; 2. Calculate and compensate vacuum fluctuations based on the vibration acquisition module data: 3. Number the vacuum chambers in each partition and adjust them independently.

[0012] Preferably, the adsorption force to be maintained , Vacuum degree to be maintained And the formula for calculating the compensation of vacuum fluctuation is: in, is the acceleration due to gravity, is the safety factor, is the density compensation factor.

[0013] Preferably, the vacuum degree adjustment process is as follows: 1. Pressure setting: Calculate the target vacuum degree of each partition according to the mass distribution of the screen partition position ; 2. Valve control strategy: Dynamically adjust the opening of the proportional solenoid valve through the PID algorithm; 3. Pump frequency coordination: adjust the vacuum pump speed according to the total required pumping speed.

[0014] Preferably, the proportional solenoid valve opening and speed The formula is: in, , is the proportionality coefficient.

[0015] Compared with the prior art, the present invention provides an OLED electronic display production and conveying device, which has the following beneficial effects: 1. A production and conveying device for OLED electronic display screens. This device uses a unique porous adsorption panel design, combined with the PID algorithm operated by the pressure acquisition module and the control module, to accurately calculate and dynamically adjust the vacuum degree to be maintained based on the quality, contact area, and surface friction coefficient of the OLED screen, and can accurately control the adsorption force. Taking a 15.6-inch flexible OLED screen as an example, the target adsorption force and target vacuum degree can be accurately calculated to ensure that the display screen can be stably adsorbed during the conveying process without causing any damage to it, greatly improving the product yield.

[0016] 2. An OLED electronic display production conveying device, the displacement acquisition module detects the horizontal offset of the screen in real time, and the vibration acquisition module monitors the vibration frequency of the conveying device. Based on these data, the control module can dynamically adjust the vacuum degree according to the vibration compensation algorithm and multi-zone collaborative control logic. When faced with an offset caused by vibration, if a 0.05mm offset is detected, the vacuum degree can be adjusted in time to effectively offset the vibration interference and offset effects, ensure the stability of the display during the conveying process, and improve product quality.

[0017] 3. A conveying device for the production of OLED electronic display screens, with multiple vacuum chambers controlled independently in different areas, and the target vacuum degree of each area is calculated according to the mass distribution of the screen area position. Through PID adjustment of the opening of the proportional solenoid valve and coordination of the speed of the vacuum pump, precise control of each area is achieved. This multi-area collaborative control method can meet the conveying needs of OLED display screens of different shapes and uneven mass distribution, and improves the versatility and adaptability of the conveying device.

[0018] 4. An OLED electronic display production and conveying device with a low-load mode and pressure balance strategy. When the vacuum demand of some partitions decreases, the corresponding solenoid valve can be closed and the pump speed can be reduced to the base frequency to reduce energy consumption. At the same time, the redundant vacuum degree is stored in the buffer tank, which effectively reduces the number of starts and stops of the vacuum pump, reduces equipment loss, extends the service life of the equipment, and further reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a production and conveying device for an OLED electronic display screen proposed by the present invention; Figure 2 This is a schematic diagram of the overall structure of an OLED electronic display production and conveying device proposed by the present invention; Figure 3 This is a schematic diagram of the structure of a vacuum adsorption platform of an OLED electronic display production and conveying device proposed by the present invention; Figure 4 A schematic diagram of the installation structure of a vacuum plate of an OLED electronic display production and conveying device proposed by the present invention; Figure 5 This is a schematic diagram of the internal structure of a vacuum adsorption platform of an OLED electronic display production and conveying device proposed by the present invention; Figure 6 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A; Figure 7 This is a schematic diagram of the installation structure between a vacuum adsorption platform and a slider of an OLED electronic display production and conveying device proposed by the present invention.

[0020] In the figure: 1. Suspended conveyor platform; 2. Slider; 3. Base; 4. Vacuum plate; 5. Vacuum chamber; 6. First groove; 7. Second groove; 8. Vacuum pump; 9. Buffer tank; 10. Main pipeline; 11. Branch pipe; 12. Displacement acquisition module; 13. Pressure acquisition module; 14. Vibration acquisition module; 15. Control module; 16. Porous adsorption panel; 17. Cover plate; 18. Solenoid valve; 19. Mounting block; 20. Mounting hole; 21. Bolt. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention 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 invention.

[0023] Reference Figure 1-Figure 7 , an OLED electronic display production conveying device, including a suspension conveying table 1, a slider 2 and a vacuum adsorption platform, the vacuum adsorption platform includes: Porous adsorption panel 16: made of silicon nitride ceramic, with a pore size of 50-200 μm and a surface covered with an antistatic layer (surface resistance ≤ 10^6Ω); Base 3: A first groove 6 and a second groove 7 are provided inside the base 3, and a porous adsorption panel 16 is fixed in the first groove 6; Vacuum plate 4: installed in the first groove 6 and located below the porous adsorption panel 16. A plurality of vacuum chambers 5 are arranged in the vacuum plate 4. The plurality of vacuum chambers 5 are independently controlled in different regions and connected to a vacuum pump 8 (limit vacuum degree ≤ 10^-3mbar) through an actuator, which is a solenoid valve group; Pressure acquisition module 13: can be a pressure sensor, installed inside each vacuum chamber 5, real-time monitoring of vacuum degree (range -100kPa to 0kPa, accuracy ±0.1%FS), one is configured inside each vacuum chamber 5; Displacement acquisition module 12: can be a displacement sensor (such as a laser triangulation reflection type), installed at the edge of the vacuum adsorption platform (the four corners of the vacuum adsorption platform and the midpoint of the long side), to detect the horizontal offset of the screen (resolution 1μm), a total of 6, 10mm away from the edge of the platform; Vibration acquisition module 14: can be a vibration sensor (such as a piezoelectric accelerometer), installed at the connection of the conveyor bracket (the four rigid connection points between the conveyor bracket and the ground / machine table), monitoring the vibration frequency (bandwidth 0.5-5000Hz); Control module 15: The main control unit (PLC or industrial PC) runs the PID algorithm to dynamically adjust the power of the vacuum pump 8 and the opening of the solenoid valve 18, and is installed on one side of the suspension conveyor platform 1; Further, the solenoid valve group includes a main pipeline 10, a buffer tank 9 and a plurality of solenoid valves 18, the buffer tank 9 is connected to the vacuum pump 8, the main pipeline 10 is connected to the buffer tank 9, the main pipeline 10 is connected to the corresponding vacuum chamber 5 through a plurality of branch pipes 11, and the solenoid valves 18 are installed on the corresponding branch pipes 11; Furthermore, the vacuum adsorption platform is located above the slider 2, and two mounting blocks 19 are provided at the bottom of the base 3. A pair of mounting holes 20 are respectively opened at the connecting parts of the mounting blocks 19 and the base 3. The base 3 is fixed to the slider 2 by multiple bolts 21 threadedly connected in the mounting holes 20.

[0024] Furthermore, through the cooperation among the displacement acquisition module 12, the pressure acquisition module 13, the vibration acquisition module 14, the control module 15 and the actuator, the control logic of dynamically adjusting the vacuum degree is as follows: 1. Dynamic control logic of adsorption force Input parameters: :OLED screen mass (unit: kg); : The contact area between the screen and the porous adsorption panel 16 (unit: m²); :Screen surface friction coefficient; Core formula: ( is the safety factor) in, : Gravitational acceleration (9.81m / s² , : The vacuum degree to be maintained (unit: Pa).

[0025] 2. Vibration compensation algorithm According to the vibration sensor data (acceleration time domain signal), calculate and compensate vacuum fluctuation: (Density compensation factor ) The priority of the vibration compensation modules can be specified in the control system: 1. Vacuum degree calculation priority: basic adsorption force > offset compensation > vibration compensation; (ii) Setting the vibration energy threshold (e.g. >0.5g (compensation activated).

[0026] 3. Multi-area collaborative control Each partitioned vacuum chamber 5 (numbered i=1, 2, ...n) is independently adjusted: In the formula, is the offset compensation coefficient ( Pa / mm), is the offset of the i-th zone detected by the displacement sensor.

[0027] Example 1 Take a 15.6-inch flexible OLED screen (mass 0.25kg, contact area 0.12m²) as an example for calculation: 1. Calculate the target adsorption force: 2. Target vacuum degree: 3. If vibration is detected causing a 0.05mm deviation: .

[0028] Example 2 When there is significant vibration in the conveying environment, the vibration sensor data should be used according to the formula Superposition compensation amount: 1. Vibration integral: 2. Dynamic adjustment: Total vacuum requirement: ; The control system updates at a frequency of 100Hz , ensuring that vibration disturbances are offset in real time.

[0029] The logic of independent control of multiple vacuum chambers with 5 partitions is as follows: (1) Vacuum adjustment process 1. Pressure setting: Calculate the target vacuum degree of each partition according to the mass distribution of the screen partition position. (See the previous article for the formula); (II) Valve control strategy Proportional solenoid valve 18 opening Dynamically adjusted by PID algorithm: in, ; (III) Pump frequency coordination: vacuum pump 8 speed Pumping speed adjustment according to total demand: ( is the proportionality factor).

[0030] (2) Energy consumption optimization (i) Low load mode: When the vacuum demand of some zones decreases, the corresponding solenoid valve 18 is closed to reduce the pump speed to the base frequency (e.g., 30% of the rated power).

[0031] (ii) Pressure balance: Redundant vacuum is stored in the buffer tank 9 to reduce the number of starts and stops of the vacuum pump 8 (e.g., the start-stop interval is ≥ 5 minutes).

[0032] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0033] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0034] In the several embodiments provided in the present application, it should be understood that the disclosed overall system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another overall system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0035] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0036] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0037] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An OLED electronic display production conveying device, comprising a suspension conveying platform (1), a slider (2) and a vacuum adsorption platform, characterized in that: The vacuum adsorption platform comprises a porous adsorption panel (16), a base (3), a vacuum plate (4), a pressure acquisition module (13), a displacement acquisition module (12), a vibration acquisition module (14) and a control module (15); a plurality of vacuum cavities (5) are arranged in the vacuum plate (4); the plurality of vacuum cavities (5) are independently controlled in different areas and connected to a vacuum pump (8) via an actuator, and the actuator is a solenoid valve group; A pressure acquisition module (13) is installed inside each vacuum cavity (5) to monitor the vacuum degree in real time; A plurality of displacement acquisition modules (12) are installed on the edge of the vacuum adsorption platform to detect the horizontal displacement of the screen; The vibration collection module (14) is installed at the connection of the conveying device bracket to monitor the vibration frequency; The control module (15) is installed on one side of the suspension conveying platform (1) to dynamically adjust the power of the vacuum pump (8) and the opening of the electromagnetic valve group, thereby adjusting the vacuum degree.

2. The OLED electronic display production and conveying device according to claim 1, characterized in that: The porous adsorption panel (16) is made of silicon nitride ceramics, and the surface is covered with an antistatic layer.

3. The OLED electronic display production and conveying device according to claim 1 is characterized in that: The base (3) is provided with a first groove (6) and a second groove (7) inside, the vacuum plate (4) and the porous adsorption panel (16) are both fixed in the first groove (6), and the vacuum plate (4) is located below the porous adsorption panel (16).

4. The OLED electronic display production and conveying device according to claim 3 is characterized in that: The solenoid valve group comprises a main pipeline (10), a buffer tank (9) and a plurality of solenoid valves (18); the buffer tank (9) is connected to a vacuum pump (8); the main pipeline (10) is connected to the buffer tank (9); the main pipeline (10) is connected to a corresponding vacuum chamber (5) via a plurality of branch pipes (11); and the solenoid valves (18) are mounted on corresponding branch pipes (11).

5. The OLED electronic display production and conveying device according to claim 4, characterized in that: The buffer tank (9) and the vacuum pump (8) are both installed in the second groove (7), the main pipeline (10) crosses the first groove (6) and the second groove (7), and a cover plate (17) is fixed above the vacuum pump (8) to seal the second groove (7).

6. The OLED electronic display production and conveying device according to claim 1, characterized in that: The vacuum adsorption platform is located above the slider (2); two mounting blocks (19) are provided at the bottom of the base (3); a pair of mounting holes (20) are respectively provided at the connection portions between the mounting blocks (19) and the base (3); the base (3) is fixed to the slider (2) via a plurality of bolts (21) threadedly connected in the mounting holes (20).

7. The OLED electronic display production and conveying device according to claim 1, characterized in that: The control logic of the dynamic adjustment of vacuum degree is as follows:

1. Input parameters: Calculate the required adsorption force and vacuum degree through the formula; 2. Calculate and compensate for vacuum fluctuation based on the data from the vibration acquisition module (14):

3. Number each partitioned vacuum chamber (5) and adjust them independently.

8. The OLED electronic display production and conveying device according to claim 7, characterized in that: The adsorption force to be maintained , Vacuum degree to be maintained And the formula for calculating the compensation of vacuum fluctuation is: in, is the acceleration due to gravity, is the safety factor, is the density compensation factor.

9. The OLED electronic display production and conveying device according to claim 8, characterized in that: The vacuum degree adjustment process is as follows:

1. Pressure setting: Calculate the target vacuum degree of each partition according to the mass distribution of the screen partition position ; 2. Valve control strategy: dynamically adjust the opening of the proportional solenoid valve (18) through the PID algorithm; 3. Pump frequency coordination: Adjust the speed of the vacuum pump (8) according to the total required pumping speed.

10. The OLED electronic display production and conveying device according to claim 9, characterized in that: The opening of the proportional solenoid valve (18) and speed The formula is: in, , is the proportionality coefficient.

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