A workpiece transfer workbench that facilitates backlight assembly film application

Abstract

The present invention discloses a workpiece transfer workbench that facilitates the application of film to backlight components. The workpiece transfer workbench comprises: a frame, a support rod disposed above the frame, a first drive assembly mounted on the support rod, a second drive assembly disposed below the first drive assembly, a crossbar disposed below the second drive assembly, a positioning identification assembly disposed below the crossbar, and a set of expansion assemblies mounted on both sides below the crossbar. The present invention utilizes a dispersed adsorption tube to achieve large-area uniform adsorption of downward pressure deformation through a flexible deformation adsorption portion and a memory metal wire, dispersing the inertial impact of the robot arm during movement. The stress concentration area at the edge of the screen is reduced from >1.5MPa to ≤0.3MPa, reducing the incidence of microcracks by 98%. The aggregated adsorption tube provides concentrated gripping force through localized strong adsorption, offsetting the lateral shear force during sudden stops or turns of the robot arm, and ensuring zero offset in the center of the screen.

Description

Technical Field

[0001] The invention relates to a workpiece transmission workbench which is convenient for laminating a backlight assembly film, and belongs to the technical field of workbenches. Background Art

[0002] In modern electronic display technology, the backlight assembly, the core optical structure of LCD (liquid crystal display) and OLED (organic light-emitting diode) screens, directly determines the display device's brightness uniformity, color reproduction, and visual comfort. For LCD screens, for example, the backlight assembly typically consists of multiple layers of optical materials, including a light guide plate (LGP), a diffuser film, a brightness enhancement film, and a reflector. The LGP uniformly converts side-emitting LED light into a surface light source, while the diffuser uses micron-sized optical particles to scatter light and eliminate localized bright and dark spots. While OLED screens do not require a traditional LGP, their flexible encapsulation layer and polarizing film still require a precision lamination process to provide anti-reflection, anti-oxidation, and mechanical support. Therefore, the lamination process for the backlight assembly must meet stringent requirements for submicron alignment accuracy (within ±5μm) and zero residual bubbles to ensure optical stability and product yield.

[0003] The current lamination process still faces multiple technical challenges. Traditional manual operations rely on operator experience for positioning and attachment, resulting in low production efficiency (taking approximately 30 seconds per piece). Factors such as hand shake and visual fatigue often lead to positioning errors exceeding ±50μm, making it difficult to meet the requirements of high-resolution display devices. Even with the use of automated transfer equipment, its mechanical structure and control logic still have significant flaws. First, the backlight assembly must be grasped and handled by a robotic arm or linear module during transfer. The inertial force (F=ma) generated by the robotic arm during acceleration and deceleration acts on the workpiece surface. Taking a typical robotic arm as an example, its Z-axis acceleration can reach 2g (g is the acceleration due to gravity). If the adsorption force is not dynamically compensated, the screen substrate (such as 0.7mm thick glass) is prone to micron-level slip due to inertia at the moment of starting and stopping, resulting in subsequent film position offset; secondly, the adsorption device of existing transmission equipment mostly adopts a single vacuum adsorption mode. The uneven distribution of adsorption force can easily form stress concentration (>1.5MPa) in the edge area of ​​the screen, causing micro-cracks in the glass or deformation of the light guide plate.

[0004] Before applying the film, the existing workpiece needs to transfer the backlight component to the processing area through a transfer workbench. During the transfer process, the robotic arm will apply a certain force to the workpiece to ensure smooth movement. However, during the movement and placement process, the inertia force may cause slight deviation and slight damage to the backlight panel, affecting the quality of the subsequent finished product. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a workpiece transfer workbench that is convenient for laminating a backlight assembly film, so as to solve the problems of the prior art.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A workpiece transfer workbench for facilitating film application of a backlight assembly, comprising:

[0008] A frame, a support rod disposed above the frame, a first drive assembly mounted on the support rod, a second drive assembly disposed below the first drive assembly, a cross bar disposed below the second drive assembly, a positioning identification assembly disposed below the cross bar, and a set of expansion assemblies mounted on both sides below the cross bar;

[0009] The first driving component drives the second driving component to move horizontally left and right, cooperates with the positioning and identification component to locate the position of the screen to be processed, moves the expansion component to the top of the screen to be processed, and drives the crossbar to rise / lower through the second driving component to adsorb and move the expansion component and the screen to be processed;

[0010] An open port is provided below the expansion component, and several groups of bulk adsorption tubes are provided in an outer ring inside the expansion component, and several groups of aggregated adsorption tubes are provided in an inner ring inside the expansion component;

[0011] The aggregated adsorption tube and the bulk adsorption tube are connected to an external air pump, and a negative pressure control valve group is provided between the aggregated adsorption tube, the bulk adsorption tube and the external air pump, and the adsorption force of the aggregated adsorption tube and the bulk adsorption tube is controlled by the negative pressure control valve group;

[0012] a retractable first pressure monitoring assembly disposed between the plurality of aggregated adsorption tubes, for monitoring the surface pressure of the expansion assembly on the screen assembly through the first pressure monitoring assembly, wherein the first pressure monitoring assembly is longer than the aggregated adsorption tubes and shorter than the dispersed adsorption tubes;

[0013] A control module, the control module being electrically connected to the pressure assembly, the negative pressure control valve group, the external air pump, and the positioning identification assembly, and cooperating with the control module through the first pressure monitoring assembly to monitor and control the downward distance of the expansion assembly;

[0014] The control module cooperates with the negative pressure control valve group to control the negative pressure value of the bulk adsorption tube for performing paradigm multi-point adsorption on the screen to be processed, and the negative pressure value of the aggregated adsorption tube for performing aggregated multi-point adsorption on the screen to be processed is controlled.

[0015] As a further improvement, the expansion assembly includes a main sleeve embedded and fixed inside the crossbar, and a plurality of auxiliary pieces integrally arranged on the lower edge of the main sleeve, wherein the plurality of auxiliary pieces enclose and form a one-way open opening in the middle portion below the main sleeve;

[0016] The bulk adsorption tube passes through the main sleeve and is embedded in the auxiliary sheet, and the aggregated adsorption tube passes through the main sleeve.

[0017] As a further improvement, the lower part of the bulk adsorption tube is bent toward the middle of the open mouth to form a deformation adsorption part, and the tube mouth of the deformation adsorption part is flush with the inner wall of the open mouth. The length of the aggregated adsorption tube is 1 / 2 of the bulk adsorption tube, and the diameter of the tube mouth below the aggregated adsorption is smaller than 1 / 3 of the diameter of the tube mouth above it.

[0018] As a further improvement, the pipeline in the deformation adsorption area of the bulk adsorption tube is a flexible tube, and a memory metal wire is embedded inside the tube, and the diameter of the memory metal wire is 0.01-0.03 mm.

[0019] As a further improvement, a first conveyor belt is located on one side of the workbench, and a second conveyor belt is located on the other side of the workbench, wherein the screen to be processed is transported by the first conveyor belt, and the processed screen is transported by the second conveyor belt;

[0020] A workbench is provided on the frame, and a third driving assembly drives the workbench to rotate 180 degrees, and the expansion assembly is moved to the top of the screen to be processed through the cooperation of the first driving assembly and the positioning identification assembly;

[0021] The screen to be processed is adsorbed and fixed by the cooperation of the second driving component and the expansion component, and the screen to be processed is transported to the corresponding workbench in cooperation with the first driving component, and the film body is completed on the workbench simultaneously.

[0022] As a further improvement, the workbench is provided with two workstations, and the two workstations are switched by the third drive assembly;

[0023] The first workstation area near the first conveyor belt is the area where the screens to be processed are placed before the switch, and the area where the screens with film applied are placed after the switch. The second workstation area near the second conveyor belt is the area where the screens to be processed are applied before and after the switch.

[0024] Of the two expansion components, the first expansion component always cooperates with the first work station area, and the second expansion component always cooperates with the second work station area.

[0025] As a further improvement, it further comprises a third conveyor belt located on the side of the second conveyor belt, the third conveyor belt being used for transporting the film;

[0026] A film taking assembly is arranged on the frame, and the film body of the third conveyor belt is transported to the screen to be processed on the workbench through the film taking assembly for film attachment.

[0027] As a further improvement, the film removal assembly includes a support fixedly mounted on the frame, a fourth drive assembly arranged on the side of the support and capable of being raised and lowered, a fifth drive assembly arranged on the fourth drive assembly, and a third expansion assembly installed below the fifth drive assembly. The expansion assembly is controlled by the fifth drive assembly to move from above the third conveyor belt to above the second workstation area, and the control module is connected to the fourth drive assembly and the fifth drive assembly.

[0028] As a further improvement, the negative pressure value range of the bulk adsorption tube in the first expansion component is -20kPa~-30kPa, and the negative pressure value range of the aggregated adsorption tube is -40kPa~-50kPa; the negative pressure value range of the bulk adsorption tube in the second expansion component is -25kPa~-35kPa, and the negative pressure value range of the aggregated adsorption tube is -50kPa~-60kPa; the negative pressure value range of the bulk adsorption tube in the third expansion component is -10kPa~-20kPa, and the negative pressure value range of the aggregated adsorption tube is -30kPa~-40kPa.

[0029] As a further improvement, the workbench is provided with a heating module, a temperature sensing module, and a second pressure monitoring component. The heating module, the temperature sensing module, and the pressure module are electrically connected to the control module. The placement status of the screen to be processed is monitored by the second pressure monitoring component, and the screen to be processed is heated by the heating module in cooperation with the control module, and the screen to be processed is heated by the gradient temperature of the temperature sensing module.

[0030] The beneficial effects of the present invention are:

[0031] This invention uses a first pressure monitoring component to monitor the surface pressure of the expansion component in real time when in contact with the screen. The control module dynamically adjusts the descent speed and adsorption force of the second drive component based on this pressure data, creating a dynamic pressure compensation mechanism. When the pressure approaches a threshold, the control module automatically reduces the descent speed and increases the negative pressure in the polyadsorption tube, ensuring stable adsorption without damaging the screen. This reduces the inertial offset from ±0.5mm in conventional devices to within ±0.05mm.

[0032] The bulk adsorption tube achieves large-area uniform adsorption of downward pressure deformation through the flexible deformation adsorption part and the memory metal wire, dispersing the inertial impact during the movement of the robotic arm. The stress concentration area at the edge of the screen is reduced from >1.5MPa to ≤0.3MPa, and the occurrence rate of microcracks is reduced by 98%.

[0033] The polymer adsorption tube provides concentrated grasping force through local strong adsorption, offsetting the lateral shear force when the robotic arm stops suddenly or turns, ensuring zero offset in the center area of the screen.

[0034] In addition, a 180° flip is achieved through the third drive component, and the first and second workstations alternately perform screen placement and film application operations. The robotic arm only needs to move a short distance, greatly reducing the inertial impact caused by long-stroke movement, and the screen offset rate is reduced from 5% to below 0.2%.

[0035] Through the intelligent collaboration of control modules, a closed-loop control system of real-time monitoring-dynamic compensation-structural reinforcement is constructed to eliminate the negative impact of inertial force on the backlight assembly from three aspects: mechanical distribution, material adaptation and motion control. Ultimately, zero offset and damage-free adsorption are achieved during the screen transfer process, providing a high-precision substrate positioning foundation for the subsequent film lamination process. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 It is a structural schematic diagram of a workpiece transfer workbench in working state 1 for facilitating film application of a backlight assembly according to the present invention.

[0038] Figure 2 yes Figure 1 A magnified schematic diagram of the structure in the middle.

[0039] Figure 3 It is a side structural schematic diagram of a workpiece transfer workbench in working state 1 for facilitating film application of a backlight assembly according to the present invention.

[0040] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle.

[0041] Figure 5 yes Figure 4 Enlarged schematic diagram of the structure at point C in the middle.

[0042] Figure 6 It is a side structural schematic diagram of a workpiece transfer workbench in working state 2 for facilitating film application of a backlight assembly according to the present invention.

[0043] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure at BB in the middle.

[0044] Figure 8 yes Figure 7 A magnified schematic diagram of the structure at point B in the middle.

[0045] Figure 9 This is a schematic diagram of the control of a workpiece transfer workbench module for facilitating film application of a backlight assembly according to the present invention.

[0046] 1. Frame; 2. Support rod; 21. First slide rail; 3. First drive assembly; 4. Second drive assembly; 5. Screen to be processed; 51. Completed screen; 6. Air pump; 61. Negative pressure control valve assembly; 11. Crossbar; 12. Positioning and identification assembly; 13. Expansion assembly; 14. Opening; 15. Bulk adsorption tube; 16. Aggregate adsorption tube; 17. First pressure monitoring assembly; 171. Casing; 172. Spring; 131. Main sleeve; 132. Auxiliary sheet; 151. Deformation adsorption unit; 152. Flexible tube ; 153. Memory wire; 7. Workbench; 71. Third drive assembly; 72. First work area; 73. Second work area; 74. Heating module; 75. Temperature sensing module; 76. Second pressure monitoring assembly; 133. First expansion assembly; 134. Second expansion assembly; 135. Third expansion assembly; 8. First conveyor belt; 81. Second conveyor belt; 82. Third conveyor belt; 9. Diaphragm; 91. Support; 92. Fourth drive assembly; 93. Fifth drive assembly; 94. Second slide rail; 10. Control module. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0049] Reference Figure 1-9 As shown, a workpiece transfer workbench for facilitating film application of a backlight assembly comprises:

[0050] A frame 1, a support rod 2 disposed above the frame 1, a first drive assembly 3 mounted on the support rod 2, a second drive assembly 4 disposed below the first drive assembly 3, a crossbar 11 disposed below the second drive assembly 4, a positioning identification assembly 12 disposed below the crossbar 11, and a set of expansion assemblies 13 mounted on both sides below the crossbar 11;

[0051] The first driving component 3 drives the second driving component 4 to move horizontally left and right, cooperates with the positioning and identification component 12 to locate the position of the screen to be processed 5, moves the expansion component 13 above the screen to be processed 5, and drives the crossbar 11 to rise / fall through the second driving component 4 to adsorb and move the expansion component 13 and the screen to be processed 5;

[0052] An opening 14 is provided below the expansion component 13, and several groups of bulk adsorption tubes 15 are provided on the outer ring inside the expansion component, and several groups of aggregated adsorption tubes 16 are provided on the inner ring inside the expansion component;

[0053] The aggregated adsorption tube 16 and the bulk adsorption tube 15 are connected to the external air pump 6. A negative pressure control valve group 61 is provided between the aggregated adsorption tube 16, the bulk adsorption tube 15 and the external air pump 6. The adsorption forces of the aggregated adsorption tube 16 and the bulk adsorption tube 15 are controlled by the negative pressure control valve group 61.

[0054] Each negative pressure control valve group 61 is provided with two, respectively controlling the aggregated adsorption tubes 16 and the dispersed adsorption tubes 15 in the same group.

[0055] A retractable first pressure monitoring assembly 17 is disposed between the plurality of aggregated adsorption tubes 16, and monitors the surface pressure of the expansion assembly 13 on the screen assembly through the first pressure monitoring assembly 17. The first pressure monitoring assembly 17 is longer than the aggregated adsorption tubes 16 and shorter than the dispersed adsorption tubes 15.

[0056] A control module, which is electrically connected to the pressure assembly, the negative pressure control valve group 61, the external air pump 6, and the positioning identification assembly 12, and cooperates with the control module through the first pressure monitoring assembly 17 to monitor and control the downward distance of the expansion assembly;

[0057] The control module cooperates with the negative pressure control valve group 61 to control the negative pressure value of the bulk adsorption tube 15 performing paradigm multi-point adsorption on the processing screen 5 , and controls the negative pressure value of the aggregated adsorption tube 16 performing aggregated multi-point adsorption on the processing screen 5 .

[0058] Since traditional manual film pasting relies on visual alignment, the positioning error is often more than ±50μm, and the inertial force during the movement of the robotic arm can easily cause the screen to shift at the micron level, directly affecting the accuracy of the film pasting.

[0059] The high-precision positioning recognition component 12 scans the screen's edge features and optical markers in real time, achieving a positioning accuracy of ±2μm. Simultaneously, the control module, in conjunction with feedback from the first pressure monitoring component 17, dynamically adjusts the descent speed and adsorption force of the expansion component 13. When the pressure monitoring component detects that the contact pressure on the screen surface approaches a safe threshold, it automatically reduces the descent speed and increases the negative pressure in the polyadsorption tube 16, ensuring adsorption stability while avoiding stress damage.

[0060] The dynamic compensation mechanism reduces the inertial offset from ±0.5mm of traditional equipment to within ±0.05mm, meeting the sub-millimeter film requirements of OLED screens. Among them, the positioning recognition component 12 is a CCD vision system.

[0061] Due to the uneven distribution of adsorption force in traditional vacuum adsorption devices, stress concentration (>1.5MPa) is easily generated at the edge of the screen, causing micro cracks on the glass substrate or deformation of the light guide plate.

[0062] The bulk adsorption tubes 15 are distributed in an outer ring, and the adsorption uniformity is enhanced by the flexible deformation adsorption part 151 and the memory metal wire 153. For example, the bulk adsorption tubes 15 of the first expansion component 133 are set to a negative pressure value of -25kPa. Under the joint action of 12 groups of adsorption points, the single point stress is ≤0.1MPa, which greatly disperses the pressure.

[0063] The inner ring of the polyadsorption tube 16 is concentrated, and the local strong adsorption design (such as the polyadsorption tube 16-60kPa of the second expansion component 134) provides concentrated gripping force through 6 to 8 groups of adsorption points, ensuring that the screen remains absolutely still under the pressure of the film roller (about 10N / cm²).

[0064] The deformable adsorption portion 151 of the bulk adsorption tube 15 elastically adapts to the screen curvature (e.g., R50mm), preventing microcracks caused by rigid contact. Actual tests have shown that stress concentration at the screen edge is reduced from >1.5MPa in traditional solutions to ≤0.3MPa, and the incidence of microcracks in the LCD light guide plate has dropped from 5% to below 0.1%.

[0065] Due to the uncontrollable adsorption force or rough attachment process of traditional equipment, the membrane 9 may be stretched, wrinkled or have a bubble rate of up to 3% to 5% after bonding.

[0066] Through low negative pressure flexible adsorption, the bulk adsorption tube 15 is set to -15kPa, the aggregated adsorption tube 16 is set to -35kPa, and combined with the deformation adsorption part 151 of the flexible tube 152, the flatness deviation of the PET film 9 after adsorption is less than 5μm.

[0067] Furthermore, traditional manual film application takes approximately 30 seconds per piece and requires frequent downtime for adjustments, resulting in an overall equipment efficiency (OEE) of only 65%. This solution utilizes a dual-station collaborative design. Workbench 7 is rotated 180° by a third drive assembly 71. The first and second workstations 72 and 73 alternately perform screen placement and film application. This eliminates the need for the robotic arm to wait for a single-station cycle, reducing the production line cycle time to 8 seconds per piece.

[0068] The control module coordinates the action timings of the first, second and third expansion components 135 .

[0069] For example, the first expansion component 133 absorbs the screen 5 to be processed on the first conveyor belt 8, the second expansion component 134 absorbs the screen processed on the first station, and the third expansion component 135 synchronously completes the film application operation on the second station;

[0070] When the first expansion assembly 133 transfers the screen to the first workstation, the third expansion assembly 135 retracts the third conveyor belt 82 to grab the film 9, and the second expansion assembly 134 simultaneously places the processed screen on the second conveyor belt 81.

[0071] Ultimately, the processing time for a single piece was reduced from 30 seconds to 8 seconds, production capacity increased by 3.75 times, and equipment OEE increased from 65% to over 90%.

[0072] The core advantages compared to existing technologies include: first, through visual positioning and dynamic pressure compensation, the film alignment accuracy is improved to ±2μm, a 25-fold improvement over manual solutions, and offset is reduced by 96%. Adsorption stability is enhanced, and the dual-mode adsorption design of dispersed / aggregated states achieves a greater than 50% adsorption force redundancy, a three-fold increase in vibration resistance, and zero screen dropout during transfer.

[0073] The graded negative pressure control from -10kPa to -60kPa is compatible with heterogeneous materials such as glass substrates and PET diaphragms, reducing the breakage rate of diaphragms by 98%.

[0074] The first pressure monitoring component 17 monitors the surface pressure of the expansion component 13 in contact with the screen in real time, with a range of 0-5N and a resolution of 0.1N. The control module dynamically adjusts the descent speed and adsorption force of the second drive component 4 based on this pressure data, implementing a dynamic pressure compensation mechanism. When the pressure approaches a threshold, such as 2.5N, the control module automatically reduces the descent speed and increases the negative pressure in the polymer adsorption tube 16, for example from -40kPa to -50kPa, to ensure stable adsorption without damaging the screen. The inertial offset is reduced from ±0.5mm in conventional devices to within ±0.05mm.

[0075] The first monitoring component and the second monitoring component are both pressure sensors. The first monitoring component includes a sleeve 171 slidably installed on the main sleeve 131. A pressure sensor is installed at the lower end of the sleeve 171. The pressure sensor is electrically connected to the control module. A spring 172 is installed above the sleeve 171. When the pressure sensor abuts the screen, the pressure data is transmitted to the control module.

[0076] The bulk adsorption tube 15 achieves a large-area uniform adsorption negative pressure value of -25kPa through the flexible deformation adsorption part 151 and the memory metal wire 153, dispersing the inertial impact during the movement of the robotic arm. The stress concentration area at the edge of the screen is reduced from >1.5MPa to ≤0.3MPa, and the occurrence rate of microcracks is reduced by 98%.

[0077] The polymer adsorption tube 16 provides concentrated gripping force through local strong adsorption, such as -60kPa, to offset the lateral shear force of about 10N / cm² when the robot arm stops suddenly or turns, ensuring zero offset in the center area of the screen.

[0078] In addition, a 180° flip is achieved through the third drive assembly 71, and the first workstation 72 and the second workstation 73 alternately perform screen placement and film application operations. The robotic arm only needs to move a short distance of less than 200mm, greatly reducing the inertial impact angular acceleration caused by long-stroke movement from >5rad / s² to <1rad / s², and the screen offset rate is reduced from 5% to below 0.2%.

[0079] Through the intelligent collaboration of control modules, a closed-loop control system of real-time monitoring-dynamic compensation-structural reinforcement is constructed to eliminate the negative impact of inertial force on the backlight assembly from three aspects: mechanical distribution, material adaptation and motion control. Ultimately, zero offset and damage-free adsorption are achieved during the screen transfer process, providing a high-precision substrate positioning foundation for the subsequent film lamination process.

[0080] As a further improvement, the expansion assembly 13 includes a main sleeve 131 embedded and fixed inside the crossbar 11, and a plurality of auxiliary pieces 132 integrally arranged on the lower edge of the main sleeve 131. The plurality of auxiliary pieces 132 surround and form a one-way open opening 14 in the middle below the main sleeve 131.

[0081] The bulk adsorption tube 15 passes through the main sleeve 131 and is embedded in the auxiliary sheet 132 . The aggregated adsorption tube 16 passes through the main sleeve 131 .

[0082] The main sleeve 131 is used as the core load-bearing structure to be embedded and fixed inside the crossbar 11, and a plurality of auxiliary pieces 132 are integrated on the lower edge thereof to form a modular assembly structure.

[0083] The embedded fixation of the main sleeve 131 and the cross bar 11, such as through a threaded or snap connection, can withstand the dynamic load of the entire expansion component 13, such as adsorption force and robot arm movement inertia, to avoid adsorption failure caused by vibration.

[0084] The auxiliary sheet 132 serves as a carrier for the adsorption tubes. Through an integrated design, the distribution position of the dispersed adsorption tubes 15 can be accurately positioned to ensure that the adsorption area covers the weak areas at the edge of the screen, such as the four corners of the LCD light guide plate.

[0085] The detachable design of the auxiliary sheet 132 facilitates the separate replacement of worn parts such as aging or clogged adsorption tubes, reducing equipment downtime and maintenance time by more than 30%.

[0086] The plurality of auxiliary pieces 132 are enclosed to form a one-way open opening 14 such as a rectangle or an ellipse, the size of which matches the screen 5 to be processed. During adsorption, the open opening 14 faces downward to contact the workpiece.

[0087] The unidirectional design of the opening 14 can concentrate the airflow direction, forming a directional adsorption field on the screen surface such as flowing from the center to the edge, accelerating air discharge to reduce adsorption delay.

[0088] By replacing the auxiliary pieces 132 of different sizes, such as expanding the number or length of the auxiliary pieces 132 , the open opening 14 can be adapted to screens of different specifications, such as 6 to 15 inches, and the versatility of the device is increased by 50%.

[0089] Among them, the opening 14 allows the airflow to quickly reverse when the adsorption ends, such as switching the positive pressure through the solenoid valve, and the screen desorption response time is shortened to 0.2 seconds, avoiding the risk of displacement due to residual negative pressure.

[0090] The discrete adsorption tubes 15 extend through the main housing 131 and are embedded in the auxiliary sheet 132, while the aggregated adsorption tubes 16 extend only through the main housing 131, forming inner and outer ring adsorption zones. By embedding the discrete adsorption tubes 15 in the auxiliary sheet 132 and placing them close to the screen edge, low negative pressure (e.g., -25kPa) achieves large-area adsorption, covering easily deformed areas of the screen, such as the corners, and reducing localized stress concentration to below 0.1MPa.

[0091] The polymer adsorption tube 16 is arranged vertically through the main sleeve 131, and provides local strong adsorption force through high negative pressure such as -60kPa, ensuring that the center area of the screen remains absolutely still under the pressure of the film roller of about 10N / cm².

[0092] The control module first cuts off the negative pressure of the aggregated adsorption tube 16 and then releases the dispersed adsorption tube 15, so that the edge of the screen leaves the adsorption area first, avoiding the stretching or warping of the diaphragm 9 caused by the delayed desorption of the center.

[0093] The adsorption tube runs through the main sleeve 131 to save horizontal space, making it easier to realize the coordinated layout of multiple components in compact equipment such as a mobile phone screen production line, such as the transport path planning of the diaphragm 9 of the third expansion component 135.

[0094] By precisely controlling the adsorption force, the dispersed / aggregated adsorption zones of the inner and outer rings meet the mechanical requirements of different process stages, reducing the screen offset from ±0.5mm to ±0.05mm. The flexible adsorption portion and memory wire 153 are compatible with multiple materials such as glass substrates, flexible OLEDs, and PET films 9, reducing the loss rate by 70%. Dynamic adsorption paths and desorption timing control support high-speed production lines with a cycle time of ≤8 seconds, and the overall equipment efficiency (OEE) reaches over 90%. This provides a stable and adaptable foundation for high-precision film lamination processes, solving the problems of adsorption damage, positioning deviation, and production capacity bottlenecks caused by the single structure of traditional equipment.

[0095] The lower portion of the bulk adsorption tube 15 bends toward the center of the open opening 14 to form a deformable adsorption portion 151. The opening of this deformable adsorption portion 151 is flush with the inner wall of the open opening 14. The aggregated adsorption tube 16 is half the length of the bulk adsorption tube 15, and the diameter of the lower opening of the aggregated adsorption tube is one-third smaller than the diameter of the upper opening. The bulk adsorption tube 15 has a flexible tube 152 in the deformable adsorption portion 151, embedded within it is a memory wire 153 with a diameter of 0.01-0.03 mm.

[0096] In order to ensure the recovery of the auxiliary sheet 132, the memory metal wire 153 is integrated with the deformation adsorption part 151 of the flexible tube 152. The deformation adsorption part 151 of the bulk adsorption tube 15 is embedded with the memory metal wire 153 with a diameter of 0.01-0.03 mm, and flexible bending is achieved through thermal drive or electrical control.

[0097] The controlled deformation of the memory wire 153 allows the suction port to conform to the curvature of the screen surface, such as an R50mm curved screen, increasing the suction contact area by 40% and enhancing suction stability. Flexible tube 152, made of materials such as silicone or TPU, combined with the micron-level deformation of the memory wire 153, can cushion the impact of sudden stops or vibrations on the robotic arm, reducing the incidence of micro-cracks on the screen by 90%. Memory wire 153 maintains its elasticity within a temperature range of -20°C to 80°C.

[0098] The deformable adsorption unit 151 directs the adsorption airflow toward the edge of the screen, such as the corners of an LCD light guide or the flexible frame of an OLED. This compensates for the negative pressure attenuation experienced by traditional linear adsorption tubes at these edges. For example, the adsorption force at the four corners of the screen can be increased by 30%, preventing localized deflection caused by insufficient adsorption.

[0099] The design of the pipe mouth being flush with the inner wall eliminates the height difference. During adsorption, there is no step transition between the edge of the screen and the contact surface of the adsorption part. The single-point pressure concentration is reduced by 50% from >1MPa of the traditional solution to ≤0.5MPa, significantly reducing the risk of micro-cracks in the glass substrate.

[0100] The composite structure of the flexible tube 152 and the memory wire 153 can withstand over 100,000 deformation cycles, compared to approximately 20,000 cycles for conventional rigid suction heads, extending the life of the device. The flexible contact surface cushions the robotic arm from sudden stops or vibration shocks, such as when Z-axis acceleration exceeds 2g, reducing the screen microcrack rate from 5% with conventional solutions to below 0.1%.

[0101] In addition, the length of the aggregated adsorption tube 16 is 1 / 2 of the bulk adsorption tube 15. The short tube design concentrates the aggregated adsorption force at the center of the screen, such as the OLED light-emitting area or the core area of the LCD backlight module, and provides concentrated gripping force through high negative pressure such as -60kPa to ensure zero offset in the center area.

[0102] The short tube reduces the air flow transmission resistance, and the negative pressure establishment time is shortened from 0.4 seconds in the traditional solution to 0.2 seconds, which meets the requirements of high-speed production lines with a cycle time of ≤8 seconds.

[0103] The diameter of the lower orifice of the aggregate adsorption tube 16 is less than one-third of its upper diameter, forming a tapered structure. This benefits from an airflow acceleration effect, where the tapered orifice increases airflow velocity. According to Bernoulli's principle, the negative pressure in the central area increases by 15%, for example, from -60kPa to -69kPa, enhancing adsorption stability.

[0104] The tapered design causes the adsorption force to decay exponentially from the tube mouth to the screen surface, avoiding local stress concentration caused by sudden changes in adsorption force, such as micro-cracks in the center of the screen.

[0105] The large-diameter upper design reduces the risk of clogging by dust particles. The clogging rate of traditional equal-diameter pipe openings is >5%, and the maintenance cycle is extended by 3 times.

[0106] The airflow at the tapered nozzle is accelerated in the reverse direction when releasing adsorption, and the desorption response time in the center area of the screen is shortened to 0.1 seconds, avoiding the stretching or warping of the diaphragm 9 caused by the center lag.

[0107] A first conveyor belt located on one side of the workbench 7 and a second conveyor belt located on the other side of the workbench 7 are used to transport the screen 5 to be processed and the second conveyor belt is used to transport the processed screen 51;

[0108] A workbench 7 is provided on the frame 1, and a third driving assembly 71 drives the workbench 7 to rotate 180 degrees, and cooperates with the positioning identification assembly 12 through the first driving assembly 3 to move the expansion assembly to above the screen 5 to be processed;

[0109] The screen 5 to be processed is adsorbed and fixed by the cooperation of the second driving component 4 and the expansion component, and the screen 5 to be processed is transported to the corresponding workbench 7 in cooperation with the first driving component 3, and the film body is completed on the workbench 7 simultaneously.

[0110] In this embodiment, the first driving assembly 3 , the second driving assembly 4 , the fourth driving assembly 92 , and the fifth driving assembly 93 are all electric guide rods.

[0111] The first slide rail 21 is installed on the support rod 2, and the second drive assembly 4 is installed on the first slide rail 21 for sliding left and right. The second drive assembly 4 is controlled by the first drive assembly 3 to move left and right on the first slide rail 21;

[0112] The lower output end of the second driving assembly 4 is fixedly mounted on the upper middle portion of the crossbar 11 , and the crossbar 11 is controlled to move up and down by the second driving assembly 4 .

[0113] A second slide rail 94 is fixedly mounted on the side of the support 91 , and the fifth drive assembly 93 is mounted on the second slide rail 94 for sliding up and down. The fifth drive assembly 93 is controlled to slide up and down by the fourth drive assembly 92 .

[0114] The third driving assembly 71 is a forward and reverse motor, the top of the output shaft of which is connected to the workbench 7 to control the workbench 7 to perform 180° forward and reverse rotation.

[0115] The workbench 7 is provided with two workstations, and the third drive assembly 71 is used to switch between the two workstations.

[0116] The first work area 72 near the first conveyor belt 8 is the placement area for the screen 5 to be processed before switching, and is the placement area for the screen after film pasting after switching. The second work area 73 near the second conveyor belt 81 is the film pasting area for the screen 5 to be processed before and after switching.

[0117] Of the two expansion assemblies 13 , the first expansion assembly 133 is always coordinated with the first workstation 72 , and the second expansion assembly 134 is always coordinated with the second workstation 73 .

[0118] It also includes a third conveyor belt 82 located on the side of the second conveyor belt 81, and the third conveyor belt 82 is used to transport the film 9;

[0119] The film taking assembly is arranged on the frame 1, and the film body of the third conveyor belt is transported to the screen 5 to be processed on the workbench 7 through the film taking assembly for film attachment.

[0120] As a further improvement, the film removal assembly includes a support 91 fixedly mounted on the frame 1, a fourth drive assembly 92 arranged on the side of the support 91 and capable of being raised and lowered, a fifth drive assembly 93 arranged on the fourth drive assembly 92, and a third expansion assembly 135 installed below the fifth drive assembly 93. The expansion assembly 13 is controlled by the fifth drive assembly 93 to move from above the third conveyor belt 82 to above the second workstation area 73, and the control module is connected to the fourth drive assembly 92 and the fifth drive assembly 93.

[0121] The first conveyor belt is dedicated to inputting screens 5 to be processed, such as unfilmed light guide plates or OLED substrates, while the second conveyor belt is dedicated to outputting finished products with film applied, thus avoiding cross-contamination of materials. The symmetrical layout saves horizontal space and facilitates the integration of front-end and back-end processes such as cleaning and inspection in compact production lines, such as mobile phone screen production lines.

[0122] The use of dual conveyor belts in parallel increases the material flow speed by 50%, and the time required for a single piece is reduced from 12 seconds in the traditional single conveyor belt solution to 8 seconds.

[0123] Through positioning and identification components 12 such as RFID or visual systems, the screens to be processed and finished products are automatically distinguished, avoiding rework caused by manual misjudgment. The traditional solution has an error rate of more than 3%. The finished screens are quickly moved out of the film application area via an independent conveyor belt, reducing the risk of secondary dust pollution.

[0124] Due to the need for dual-station collaboration, the workbench 7 is divided into two workstation areas, the first workstation area 72 and the second workstation area 73. It is driven by a third drive component 71 such as a servo motor + harmonic reducer to flip 180°, alternating between screen adsorption transfer and film pasting operations.

[0125] The rotating design enables the first and second expansion components 134 of the expansion assembly 13 to be fixed above two workstations respectively, reducing the number of cross-region movements of the robotic arm. In traditional solutions, the robotic arm needs to frequently go back and forth to pick up and place materials.

[0126] The synchronous operation of the two workstations shortens the production line cycle from 15 seconds per piece of the traditional single workstation to 8 seconds per piece, and the production capacity is increased by 87.5%.

[0127] The first expansion assembly 133 constantly cooperates with the first workstation 72 to absorb the screen 5 to be processed, while the second expansion assembly 134 constantly cooperates with the second workstation 73 to complete the film application. This reduces the inertial offset caused by long-distance movement of the robotic arm from ±0.3mm to ±0.05mm. The robotic arm's motion path is shortened by 40%, joint wear is reduced by 60%, and the maintenance cycle is extended from three months to one year.

[0128] After the first conveyor belt delivers the screens 5 to be processed into the first workstation 72 , the workbench 7 rotates 180° to transfer the screens to the second workstation 73 for film lamination. Meanwhile, the first workstation 72 is free to receive the next batch of screens 5 to be processed.

[0129] The control module adjusts the adsorption force of the expansion component 13 in real time through the pressure monitoring component, such as increasing the negative pressure value of the polymer adsorption tube 16 by 10% during rotation to offset the screen micro-motion caused by centrifugal force angular acceleration > 2rad / s².

[0130] The linkage between the dual conveyor belts and the rotary table 7 increases the overall equipment efficiency (OEE) from 70% in traditional solutions to over 90%. Furthermore, the servo motor-driven rotary table 7 saves 30% more energy than traditional pneumatic turning mechanisms, and offers positioning accuracy of ±0.1°, compared to ±1° in traditional pneumatic solutions.

[0131] The negative pressure value range of the bulk adsorption tube 15 in the first expansion component 133 is -20kPa~-30kPa, and the negative pressure value range of the aggregated adsorption tube 16 is -40kPa~-50kPa. The negative pressure value range of the bulk adsorption tube 15 in the second expansion component 134 is -25kPa~-35kPa, and the negative pressure value range of the aggregated adsorption tube 16 is -50kPa~-60kPa. The negative pressure value range of the bulk adsorption tube 15 in the third expansion component 135 is -10kPa~-20kPa, and the negative pressure value range of the aggregated adsorption tube 16 is -30kPa~-40kPa.

[0132] Since the first expansion assembly 133 is responsible for adsorbing and transferring the screen 5 to be processed from the first conveyor belt to the workstation 7 , both adsorption stability and screen protection must be considered.

[0133] Therefore, the dispersed adsorption tubes 15 use a moderate negative pressure of -20kPa to -30kPa to achieve uniform adsorption over a large area, dispersing the pressure to prevent microcracks or deformation on the screen surface caused by localized stress concentration. The concentrated adsorption tubes 16 use a higher negative pressure of -40kPa to -50kPa to provide strong localized adsorption force, offsetting the inertial impact during the movement of the robotic arm and preventing screen shifting.

[0134] The screen is made of rigid materials such as glass substrates and requires sufficient adsorption force to maintain stability, but excessive negative pressure may cause edge stress concentration, especially in the precise laminated structure of LCD / OLED.

[0135] The second expansion assembly 134 transfers the screen with the film 9 initially attached to it to the next step of film lamination and bubble removal. The screen is fixed at the lamination station and the film 9 is aided in lamination, which requires extremely high stability to ensure optical alignment accuracy.

[0136] Therefore, the negative pressure of the bulk adsorption tube 15 is slightly higher than that of the first component, at -25kPa to -35kPa. This increases the adsorption coverage area, improving overall stability and suppressing micro-vibrations during the film application process. The negative pressure of the aggregated adsorption tube 16 is increased to -50kPa to -60kPa, ensuring that the screen remains absolutely still under the pressure of film application, preventing blistering or misalignment of the film 9 due to micron-level deviation.

[0137] The third expansion component 135 transports the film 9 by absorbing a thin film such as a diffusion film or a brightness enhancement film and accurately attaching it to the screen surface, and it is necessary to prevent the film 9 from being stretched, wrinkled or torn.

[0138] Therefore, the bulk adsorption tube 15 achieves flexible adsorption by using a low negative pressure of -10kPa to -20kPa, adapting to the high flexibility of the membrane 9 and preventing stretching deformation caused by excessive adsorption force. The aggregated adsorption tube 16 controls the negative pressure to -30kPa to -40kPa, providing a locally controllable adsorption force to assist in aligning the edges of the membrane 9 while preventing excessive concavity in the center of the membrane 9, which could cause wrinkles.

[0139] Diaphragm 9 is mostly made of polymer materials such as PET, which has a low elastic modulus of about 2-4 GPa. Excessive adsorption can easily lead to irreversible deformation. Low-negative-pressure flexible adsorption ensures that diaphragm 9 rebounds quickly when separated from expansion assembly 13, maintaining flatness.

[0140] The synergistic effect of the dispersed and aggregated adsorption tubes 16, such as the combination of -35kPa and -60kPa in the second component, can form an adsorption field that is "soft outside and hard inside", which not only ensures the overall stability of the screen, but also resists external disturbances through local strong adsorption.

[0141] The third component is designed for the low negative pressure range of -10kPa to -40kPa according to the characteristics of the diaphragm 9. Combined with the deformation adsorption portion 151 of the flexible tube 152, the stress concentration on the contact surface of the diaphragm 9 can be reduced.

[0142] The negative pressure difference between the first and second components, such as 16-50kPa vs. -60kPa for the polymer adsorption tube, matches the 180° flip process of workbench 7, ensuring that the adsorption force redundancy of the screen is greater than 20% during the station switching process to prevent it from falling off due to gravity or centrifugal force.

[0143] In the screen adsorption test, under -50kPa aggregate adsorption, the adsorption rigidity of the glass substrate with a thickness of 0.7mm increased by 35%, and the residual vibration amplitude was less than 2μm, meeting the film adhesion accuracy requirements.

[0144] In the adsorption test of the membrane 9, at -15kPa bulk adsorption, the flatness deviation of the PET membrane 9 with a thickness of 100μm was less than 5μm, which is 60% lower than the traditional vacuum adsorption solution.

[0145] Its energy consumption comparison shows that by controlling the negative pressure value by partitioning, such as low negative pressure in the third component, the overall energy consumption of the system is reduced by 18% and the life of the air pump 6 is extended by 25%.

[0146] The workbench 7 is provided with a heating module 74, a temperature sensing module 75, and a second pressure monitoring component 76. The heating module 74, the temperature sensing module 75, and the pressure module are electrically connected to the control module. The placement status of the screen to be processed 5 is monitored by the second pressure monitoring component 76, and the screen to be processed 5 is heated by the heating module 74 in cooperation with the control module, and the screen to be processed 5 is heated by the gradient temperature through the temperature sensing module 75.

[0147] Based on the thermal property differences between the screen's glass substrate, OLED light-emitting layer, and the PET diffusion film and brightness enhancement film, a two-stage gradient temperature curve is used: during normal use, the temperature is maintained at 30°C during the preheating phase. When the second pressure monitoring component 76 detects pressure from the screen being placed above, the temperature is increased to 50°C ± 2°C during the insulation phase.

[0148] The adhesive layer of the film reaches the best adhesion peel strength of >1.5N / mm at 50℃, while avoiding excessive softening of the adhesive layer and reducing the shear modulus G to 0.1MPa to ensure the shape stability after bonding.

[0149] It should be noted that the device structure and drawings of the present invention mainly describe the principles of the present invention. In terms of the technology of the design principle, the settings of the device's power mechanism, power supply system, and control system are not fully described. However, those skilled in the art can clearly understand the details of its power mechanism, power supply system, and control system on the premise that they understand the principles of the above invention. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be implemented by simple programming by those skilled in the art.

[0150] The standard parts used can be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the components known to technical personnel in this field, their structures and principles can be known to these technical personnel through technical manuals or through conventional experimental methods.

[0151] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A workpiece transfer workbench that facilitates backlight assembly film application, characterized in that: include: A frame (1), a support rod (2) arranged above the frame (1), a first drive assembly (3) mounted on the support rod (2), a second drive assembly (4) arranged below the first drive assembly (3), a cross bar (11) arranged below the second drive assembly (4), a positioning identification assembly (12) arranged below the cross bar (11), and a group of expansion assemblies (13) mounted on both sides below the cross bar (11); The first driving component (3) drives the second driving component (4) to move horizontally to the left and right, cooperates with the positioning identification component (12) to locate the position of the screen to be processed (5), moves the expansion component (13) above the screen to be processed (5), and drives the crossbar (11) to rise / fall through the second driving component (4), so that the expansion component (13) and the screen to be processed (5) are adsorbed and moved; An open port (14) is provided below the expansion component (13), a plurality of groups of dispersed adsorption tubes (15) are provided in an outer ring inside the expansion component (13), and a plurality of groups of aggregated adsorption tubes (16) are provided in an inner ring inside the expansion component; The aggregated adsorption tube (16) and the dispersed adsorption tube (15) are in communication with an external air pump (6); a negative pressure control valve group (61) is provided between the aggregated adsorption tube (16), the dispersed adsorption tube (15) and the external air pump (6); and the adsorption forces of the aggregated adsorption tube (16) and the dispersed adsorption tube (15) are respectively controlled by the negative pressure control valve group (61); a retractable first pressure monitoring assembly (17) disposed between the plurality of aggregated adsorption tubes (16), for monitoring the surface pressure of the expansion assembly (13) on the screen assembly via the first pressure monitoring assembly (17); the first pressure monitoring assembly (17) being longer than the aggregated adsorption tubes (16) and shorter than the dispersed adsorption tubes (15); A control module, the control module being electrically connected to the first pressure monitoring component (17), the negative pressure control valve group (61), the external air pump (6), and the positioning identification component (12), and monitoring and controlling the downward distance of the expansion component through the cooperation between the first pressure monitoring component (17) and the control module; The control module cooperates with the negative pressure control valve group (61) to control the negative pressure value of the bulk adsorption tube (15) performing paradigm multi-point adsorption on the screen to be processed (5), and controls the negative pressure value of the aggregated adsorption tube (16) performing aggregated multi-point adsorption on the screen to be processed (5); The expansion assembly (13) comprises a main sleeve (131) embedded and fixed inside the crossbar (11), and a plurality of auxiliary pieces (132) integrally arranged at the lower edge of the main sleeve (131), wherein the plurality of auxiliary pieces (132) are combined to form a one-way open opening (14) in the middle portion below the main sleeve (131); The bulk adsorption tube (15) passes through the main sleeve (131) and is embedded in the auxiliary sheet (132); the aggregated adsorption tube (16) passes through the main sleeve (131); The lower portion of the bulk adsorption tube (15) is bent toward the middle of the open opening (14) to form a deformation adsorption portion (151), and the tube opening of the deformation adsorption portion (151) is flush with the inner wall of the open opening (14). The length of the aggregated adsorption tube (16) is 1 / 2 of the bulk adsorption tube (15), and the diameter of the tube opening below the aggregated adsorption tube (16) is less than 1 / 3 of the diameter of the tube opening above it.

2. The workpiece transfer workbench for facilitating film application of a backlight assembly according to claim 1, characterized in that: The pipeline in the deformation adsorption portion (151) of the bulk adsorption tube (15) is a flexible tube (152), and a memory metal wire (153) is embedded inside the bulk adsorption tube (15), and the diameter of the memory metal wire (153) is 0.01-0.03 mm.

3. The workpiece transfer workbench for facilitating backlight assembly film application according to claim 1, characterized in that: A first conveyor belt (8) located on one side of the workbench (7) and a second conveyor belt (81) located on the other side of the workbench (7), wherein the screen (5) to be processed is transported via the first conveyor belt (8), and the processed screen (51) is transported via the second conveyor belt (81); A workbench (7) provided on the frame (1) and a third driving assembly (71) for driving the workbench (7) to rotate 180 degrees, wherein the expansion assembly (13) is moved above the screen (5) to be processed by cooperating with the positioning identification assembly (12) through the first driving assembly (3); The screen to be processed (5) is adsorbed and fixed by the cooperation of the second driving component (4) and the expansion component (13), and the screen to be processed (5) is transported to the corresponding workbench (7) in cooperation with the first driving component (3), and the film body is completed on the workbench (7) simultaneously.

4. The workpiece transfer workbench for facilitating film application of a backlight assembly according to claim 3, characterized in that: The workbench (7) is provided with two workstations, and the two workstations are switched by the third drive assembly (71); The first workstation area (72) near the first conveyor belt (8) is a placement area for screens to be processed (5) before switching, and is a placement area for screens with film applied after switching. The second workstation area (73) near the second conveyor belt (81) is a film application area for screens to be processed (5) before and after switching; Of the two expansion components (13), the first expansion component (133) always cooperates with the first workstation area (72), and the second expansion component (134) always cooperates with the second workstation area (73).

5. The workpiece transfer workbench for facilitating film application of a backlight assembly according to claim 4, characterized in that: It also includes a third conveyor belt (82) located on the side of the second conveyor belt (81), and the third conveyor belt (82) is used to transport the film (9); A film taking assembly is provided on the frame (1), and the film body of the third conveyor belt (82) is transported to the screen (5) to be processed on the workbench (7) through the film taking assembly for film attachment.

6. The workpiece transfer workbench for facilitating film application of a backlight assembly according to claim 5, characterized in that: The film removal assembly includes a support (91) fixedly mounted on the frame (1), a fourth drive assembly (92) arranged on the side of the support (91) and capable of being raised and lowered, a fifth drive assembly (93) arranged on the fourth drive assembly (92), and a third expansion assembly (135) installed below the fifth drive assembly (93), wherein the expansion assembly (13) is controlled by the fifth drive assembly (93) to move from above the third conveyor belt (82) to above the second workstation (73), and the control module is connected to the fourth drive assembly (92) and the fifth drive assembly (93).

7. The workpiece transfer workbench for facilitating film application of a backlight assembly according to claim 6, characterized in that: The negative pressure value range of the bulk adsorption tube (15) in the first expansion component (133) is -20 kPa to -30 kPa, and the negative pressure value range of the aggregated adsorption tube (16) is -40 kPa to -50 kPa. The negative pressure value range of the bulk adsorption tube (15) in the second expansion component (134) is -25 kPa to -35 kPa, and the negative pressure value range of the aggregated adsorption tube (16) is -50 kPa to -60 kPa. The negative pressure value range of the bulk adsorption tube (15) in the third expansion component (135) is -10 kPa to -20 kPa, and the negative pressure value range of the aggregated adsorption tube (16) is -30 kPa to -40 kPa.

8. The workpiece transfer workbench for facilitating film application of a backlight assembly according to claim 1, characterized in that: The workbench (7) is provided with a heating module (74), a temperature sensing module (75), and a second pressure monitoring component (76). The heating module (74), the temperature sensing module (75), and the pressure module are electrically connected to the control module. The placement state of the screen to be processed (5) is monitored by the second pressure monitoring component (76). The screen to be processed (5) is heated by the heating module (74) in cooperation with the control module, and the screen to be processed (5) is heated by the gradient temperature of the temperature sensing module (75).

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