A folding test device for a foldable display panel

Abstract

The application discloses a kind of folding test equipment of foldable display panel applied to test field, and the synchronous completion of double folding action of the panel to be measured is completed by center adsorption plate, inner folding adsorption plate and outer folding adsorption plate cooperation, real restoration double folding area stress coupling and interactive deformation condition, the problem that existing bending equipment is difficult to simulate panel double folding use scene is solved, and synchronous double folding not only realizes the simulation of real use scene, but also improves bending test efficiency;At the same time, by using extrusion plate and its adjusting mechanism, the efficient adjustment of the bending angle of the panel to be measured is realized;In addition, cooperate with industrial camera, the position and bending angle of the panel to be measured are monitored in real time, which is convenient for accurate control of bending angle and bending frequency, adapts to various bending shapes of the panel to be measured, provides comprehensive and accurate simulation environment for durability and reliability verification of double folding panel, meets the needs of multi-form and multi-angle bending test.

Description

Technical Field

[0001] This invention relates to the field of testing, and in particular to a bending test device for a foldable display panel. Background Technology

[0002] Panel bending equipment is the core equipment for testing the durability of foldable display panels. It mainly consists of a base, support frame, adsorption mechanism, drive mechanism, and limiting mechanism. The base and support frame form the main body of the equipment, ensuring test stability. The adsorption mechanism (such as a vacuum adsorption plate) is used to fix the panel under test and prevent displacement during bending. The drive mechanism (motor, lead screw, etc.) provides power to drive the panel to perform the bending action. The limiting mechanism precisely controls the bending angle and stroke to avoid excessive bending and damage to the panel. The equipment verifies the bending durability and structural reliability by simulating the actual folding conditions of the panel.

[0003] The existing patent with publication number CN113029838B discloses a panel bending test device and system. It uses a bending mechanism to bend the panel to be tested. The pressure sensor in the detection mechanism detects the pressure value of the panel and outputs an electrical signal. The controller receives the signal and controls the bending angle of the bending mechanism. At the same time, it determines the test result based on the signal, realizes the automated bending test of the panel, avoids human error, and effectively improves the accuracy and efficiency of bending strength testing.

[0004] The existing patent with publication number CN106783660B discloses a bending test device and bending test method for flexible display panels. It uses air holes to vacuum and adsorb the panel to fix it. By controlling the motor to drive the clamping plate to reciprocate, the panel can form different bending diameters. It does not require clamping head, avoiding the problems of surface tension not being released and interlayer delamination caused by clamping head during panel bending. It can achieve accurate bending test, truly reflect the bending characteristics of the panel, and effectively improve the test accuracy.

[0005] The aforementioned prior art discloses a technical solution for automated bending testing using electrical signals output by a pressure sensor, thereby improving testing efficiency. It also discloses a technical solution for using negative pressure adsorption to replace clamp fixation, reducing panel bending delamination and improving testing accuracy. However, the prior art still has shortcomings. Existing bending testing equipment is mainly for bending tests of single-fold panels. However, double-fold panels are subjected to more complex forces during folding, and their bending areas exhibit stress coupling and bidirectional deformation characteristics. Traditional single-fold testing equipment cannot achieve a true simulation of double-fold morphology, making it difficult to meet the requirements for folding condition simulation and reliability testing of double-fold panels. Summary of the Invention

[0006] The core of this invention lies in solving the problem that existing single-fold testing equipment cannot simulate the synchronous bending of double-fold panels inside and out by using three independent adsorption plates and a pair of extrusion plates. At the same time, the bending angle and bending shape can be adjusted by using an industrial camera and an electric push rod.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A bending test device for a foldable display panel includes a base, a support frame fixedly connected to the base, a central adsorption plate above the support frame, an inner folding adsorption plate to the left of the central adsorption plate, and an outer folding adsorption plate to the right of the central adsorption plate. The central adsorption plate, the inner folding adsorption plate, and the outer folding adsorption plate cooperate to adsorb and fix the panel to be tested. A central rotating shaft is fixedly connected to the lower end of the central adsorption plate, and the output shaft of the first motor is fixedly connected to the lower end of the central rotating shaft. A horizontal plate is fixedly connected to the housing of the first motor, and the horizontal plate is fixedly connected to the inner wall of the support frame. A rotating shaft is fixedly connected to the lower end of both the inner and outer folding adsorption plates. A first slider is rotatably connected to the rotating shaft, and the first slider is laterally slidably connected to the support frame. A pair of symmetrically arranged extrusion plates are provided on the outer sides of the inner and outer folding adsorption plates. The pair of extrusion plates are connected to an extrusion mechanism that drives the pair of extrusion plates to move in opposite directions or in opposite directions.

[0009] Furthermore, the central adsorption plate, the inner folded adsorption plate, and the outer folded adsorption plate are all vacuum adsorption plates. The vacuum adsorption plate includes a plate body, and a placement groove for accommodating the panel to be tested is opened on the front side of the plate body. The placement groove has evenly distributed suction holes, and the suction holes are connected to the same suction chamber. The suction chamber is opened inside the plate body and is connected to an external vacuum machine through an air pipe.

[0010] Furthermore, the first slider is a block structure with an I-shaped cross-section, and a transverse groove is provided on the upper surface of the support frame for the first slider to slide laterally.

[0011] Furthermore, a pair of symmetrically arranged locking mechanisms are provided on the horizontal plate. The locking mechanism includes a plug-in block, which is movably engaged with both the rotating shaft and the first slider. The plug-in block is used to restrict the rotation of the rotating shaft and to restrict the lateral sliding of the first slider. A lifting frame is fixedly connected to the lower end of the plug-in block. The lifting frame movably passes through the horizontal plate. An elastic pin is installed on the inner side of the lifting frame. The inner wall of the support frame is provided with a first positioning hole and a second positioning hole that cooperate with the elastic pin.

[0012] Furthermore, the plug-in block includes a strip plate, on which a pair of mirror-arranged wedge blocks are fixedly connected. The pair of wedge blocks are used to engage with both sides of the first slider to restrict the lateral movement of the first slider. A plug-in plate is fixedly connected between the pair of wedge blocks. A radial groove for inserting the plug-in plate is provided at the lower end of the rotating shaft, and a strip groove for inserting the plug-in plate is provided at the lower end of the first slider.

[0013] Furthermore, the sidewalls of the pair of wedges on opposite sides are provided with inclined surfaces, and the upper end of the plug-in plate is an arc-shaped surface.

[0014] Furthermore, the extrusion mechanism adopts a bidirectional lead screw module, which includes a pair of moving blocks connected to a pair of extrusion plates. The pair of moving blocks are slidably connected to a support plate, and the support plate is fixedly connected to the base. The pair of moving blocks are threadedly connected to the same bidirectional lead screw, and a second motor is fixedly connected to the end of the bidirectional lead screw. The housing of the second motor is fixedly connected to the outer wall of the support plate.

[0015] Furthermore, each of the inner walls of the pair of extrusion plates is hinged with a connecting rod, and the inner ends of each pair of connecting rods are rotatably connected to a second slider. One of the second sliders is slidably connected to the upper end of the inner folded adsorption plate, and the other second slider is slidably connected to the upper end of the outer folded adsorption plate. The upper ends of both the inner and outer folded adsorption plates are provided with sliding grooves for the second sliders to slide.

[0016] Furthermore, an industrial camera is installed above the central adsorption plate. The industrial camera is used to detect the position and bending angle of the panel to be tested. The industrial camera is fixedly connected to a mounting bracket, which is fixedly connected to the support plate. The first motor, the second motor, and the industrial camera are all electrically connected to the same controller.

[0017] Furthermore, an adjustment mechanism is provided between the moving block and the extrusion plate. The adjustment mechanism includes a mounting rod fixedly connected to the moving block. The end of the mounting rod away from the moving block is rotatably connected to the extrusion plate. An electric push rod is hinged to the side wall of the mounting rod. The extended end of the electric push rod is hinged to the outer wall of the extrusion plate. The electric push rod is electrically connected to the controller.

[0018] Compared with the prior art, the advantages of this invention are: (1) This invention uses a central adsorption plate, an inner fold adsorption plate, and an outer fold adsorption plate to perform synchronous inner and outer double folding of the panel under test, overcoming the problem that existing panel bending test devices can only perform single fold bending tests. It simulates the stress scenario of the panel under test when it is double folded inward and outward. By performing inner and outer folding simultaneously on a panel, it can not only reveal the failure mode of the two bending areas under the action of interactive stress coupling, but also greatly improve the test efficiency and facilitate the study of the influence of asymmetric bending shape on the screen. This provides a more comprehensive and accurate simulation environment for the durability and reliability verification of the panel. In addition, with a pair of extrusion plates, the extrusion plates can extrude the inner fold adsorption plate and the outer fold adsorption plate to achieve efficient adjustment of the bending angle of the panel under test and adapt to the bending test requirements of different bending angles.

[0019] (2) The present invention uses an industrial camera to monitor the position and bending angle of the panel under test in real time, which facilitates precise control of the bending angle and the number of bends. At the same time, by using the adjustment mechanism set between the extrusion mechanism and the extrusion plate, the tilt angle of the extrusion plate can be controlled, thereby simulating various bending forms of the panel under test and meeting the testing requirements of various bending forms. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the assembly structure of the support frame and the central adsorption plate in this invention; Figure 3 This is an exploded view of the locking mechanism in this invention; Figure 4 This is a three-dimensional structural diagram of the extrusion mechanism in this invention; Figure 5 This is a cross-sectional view of the inwardly folded adsorption plate in this invention. Figure 6 This is a schematic diagram of the bending of the panel under test in this invention; Figure 7 This is a three-dimensional assembly structure diagram of the rotating shaft and the plug-in block in this invention; Figure 8 This is a schematic diagram showing the engagement between the plug block, the rotating shaft, and the first slider in this invention. Figure 9 This is a schematic diagram showing the disengagement of the plug block and the first slider in the locking mechanism of the present invention; Figure 10 This is a schematic diagram of the U-shaped bend and mushroom-shaped bend in the inner fold area of ​​the panel under test in this invention; Figure 11 This is a schematic diagram of the teardrop-shaped bend in the inner fold area of ​​the panel under test in this invention.

[0021] Explanation of the labels in the diagram: 1. Base; 2. Support frame; 201. Transverse slide groove; 202. First positioning hole; 203. Second positioning hole; 3. Central adsorption plate; 4. Inner fold adsorption plate; 401. Placement groove; 402. Suction hole; 403. Suction chamber; 404. Sliding groove; 5. Outer fold adsorption plate; 6. Panel to be tested; 7. Central rotating shaft; 8. First motor; 9. Rotating shaft; 901. Radial groove; 10. First slider; 1001. Strip groove; 11. Extrusion plate; 12. Extrusion mechanism; 13. Lock 14. Stopping mechanism; 15. Horizontal plate; 16. Insertion block; 17. Strip plate; 18. Wedge block; 19. Insertion plate; 20. Lifting frame; 11. Elastic pin; 12. Insertion rod; 13. Holding plate; 14. Fixed cylinder; 15. Spring; 16. Mounting rod; 17. Moving block; 28. Support plate; 29. ​​Two-way lead screw; 20. Second motor; 21. Industrial camera; 22. Mounting bracket; 23. Electric push rod; 24. Connecting rod; 25. Second slider. Detailed Implementation

[0022] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0023] First implementation method Please see Figure 1 and Figure 2 In one embodiment of the present invention, a bending test device for a foldable display panel includes a base 1, a support frame 2 fixedly connected to the base 1, a central adsorption plate 3 above the support frame 2, an inner folding adsorption plate 4 on the left side of the central adsorption plate 3, and an outer folding adsorption plate 5 on the right side of the central adsorption plate 3. The central adsorption plate 3, the inner folding adsorption plate 4, and the outer folding adsorption plate 5 cooperate to adsorb and fix the panel 6 to be tested. Please see Figures 1-3 A central adsorption plate 3 is fixedly connected to a central rotating shaft 7 at its lower end. The output shaft of a first motor 8 is fixedly connected to the lower end of the central rotating shaft 7. A horizontal plate 14 is fixedly connected to the housing of the first motor 8. The horizontal plate 14 is fixedly connected to the inner wall of the support frame 2. The first motor 8 drives the central adsorption plate 3 to rotate through the central rotating shaft 7. A rotating shaft 9 is fixedly connected to the lower end of both the inner folding adsorption plate 4 and the outer folding adsorption plate 5. A first slider 10 is rotatably connected to the rotating shaft 9. The first slider 10 is laterally slidably connected to the support frame 2. A pair of symmetrically arranged extrusion plates 11 are provided on the outer sides of the inner folding adsorption plate 4 and the outer folding adsorption plate 5. An extrusion mechanism 12 is connected to the pair of extrusion plates 11 to drive the pair of extrusion plates 11 to move in opposite directions or in opposite directions.

[0024] Specifically, during the bending test, firstly, the panel to be tested 6 is fixed on the central adsorption plate 3, the inner fold adsorption plate 4, and the outer fold adsorption plate 5. Then, the first motor 8 is started. The first motor 8 drives the central adsorption plate 3 to rotate clockwise through the central rotating shaft 7. The central adsorption plate 3 drives the inner fold adsorption plate 4 on its left side to move laterally and rotate counterclockwise through the panel to be tested 6, causing the panel to be tested 6 located between the inner fold adsorption plate 4 and the central adsorption plate 3 to bend inward. At the same time, the central adsorption plate 3 drives the outer fold adsorption plate 5 to move laterally and rotate counterclockwise through the panel to be tested 6, causing the panel to be tested 6 located between the central adsorption plate 3 and the outer fold adsorption plate 5 to bend outward. At the same time, the extrusion mechanism 12 is activated, which drives a pair of extrusion plates 11 to move towards each other. The extrusion plate 11 on the left side performs lateral extrusion on the inner folded adsorption plate 4 after it has been rotated and tilted (the angle between the inner folded adsorption plate 4 and the central adsorption plate 3 is less than 180 degrees). The extrusion plate 11 on the right side performs lateral extrusion on the outer folded adsorption plate 5 after it has been rotated and tilted. The smaller the distance between the pair of extrusion plates 11, the smaller the bending angle of the bending area of ​​the panel 6 under test, thus realizing the inner and outer double folding test of the panel 6 under test.

[0025] It should be noted that when the panel under test is folded inwards towards the display side, it is folded outwards towards the non-display side. The minimum distance between a pair of extrusion plates 11 is the sum of the width of the central adsorption plate 3, the width of the inward adsorption plate 4, the width of the outward adsorption plate 5, and three times the width of the panel.

[0026] Compared to traditional panel bending test devices, this invention uses a central adsorption plate 3, an inner folding adsorption plate 4, and an outer folding adsorption plate 5 to simultaneously perform inward and outward double folding on the panel under test 6. This overcomes the limitation of existing panel bending test devices that can only perform single-fold bending tests. It simulates the stress scenario of the panel under test 6 during inward and outward double folding. By simultaneously performing inward and outward folding on a single panel, it can not only reveal the failure modes of the two bending areas under the interaction of stress coupling, but also significantly improve test efficiency and facilitate the study of the impact of asymmetric bending morphology on the screen. This provides a more comprehensive and accurate simulation environment for verifying the durability and reliability of the panel. In addition, a pair of extrusion plates 11 are used to extrude the inner folding adsorption plate 4 and the outer folding adsorption plate 5, thereby achieving efficient adjustment of the bending angle of the panel under test 6 and adapting to the bending test requirements of different bending angles.

[0027] Please see Figure 2 and Figure 5The central adsorption plate 3, the inner folded adsorption plate 4, and the outer folded adsorption plate 5 are all vacuum adsorption plates. The vacuum adsorption plate includes a plate body. A placement groove 401 for accommodating the panel 6 to be tested is opened on the front side of the plate body. The placement groove 401 has evenly distributed suction holes 402. The suction holes 402 are connected to the same suction chamber 403. The suction chamber 403 is opened inside the plate body and is connected to an external vacuum machine through an air pipe (not shown in the figure).

[0028] Specifically, when the adsorption plate is a vacuum adsorption plate, the external vacuum machine is started. The external vacuum machine removes the gas in the suction chamber 403 and suction hole 402 through the air pipe, so that the suction hole 402 forms a negative pressure, and the panel 6 to be tested is adsorbed and fixed. In addition, the central adsorption plate 3, the inner folded adsorption plate 4 and the outer folded adsorption plate 5 can also be adhesive adsorption plates (not shown in the figure). The adhesive adsorption plate includes a plate body and an adhesive pad fixed on the front side of the plate body. The adhesive pad is used to bond and fix the panel 6 to be tested to the plate body.

[0029] Please see Figure 1 and Figure 2 The first slider 10 is a block structure with an I-shaped cross section, and the upper end face of the support frame 2 is provided with a transverse groove 201 for the first slider 10 to slide laterally.

[0030] Specifically, when the central adsorption plate 3 rotates clockwise, the central adsorption plate 3 drives the inner fold adsorption plate 4 and the outer fold adsorption plate 5 to move laterally and rotate through the panel under test 6. At this time, the first slider 10 slides laterally along the transverse slide groove 201, and the rotating shaft 9 rotates within the first slider 10, which facilitates the simulation of the synchronous inner and outer bending of the panel under test 6 and improves the stability of the bending.

[0031] Please see Figure 2 and Figure 3 A pair of symmetrically arranged locking mechanisms 13 are provided on the horizontal plate 14. The locking mechanism 13 includes a plug block 15. The plug block 15 is movably engaged with the rotating shaft 9 and the first slider 10. The plug block 15 is used to restrict the rotation of the rotating shaft 9 and to restrict the lateral sliding of the first slider 10. A lifting frame 16 is fixedly connected to the lower end of the plug block 15. The lifting frame 16 movably passes through the horizontal plate 14. An elastic pin 17 is installed on the inner side of the lifting frame 16. The inner wall of the support frame 2 is provided with a first positioning hole 202 and a second positioning hole 203 that cooperate with the elastic pin 17.

[0032] Specifically, when bending is required, the elastic pin 17 is pulled out, disengaging it from the first positioning hole 202. Then, the lifting frame 16 is pulled down, inserting the elastic pin 17 into the second positioning hole 203. At this time, the plug block 15 disengages from the first slider 10, allowing the first slider 10 to slide laterally within the transverse groove 201, and the rotating shaft 9 can rotate. Similarly, when locking the inner folding adsorption plate 4 and the outer folding adsorption plate 5 is required, the elastic pin 17 is pulled out and the lifting frame 16 is pushed upward, inserting the elastic pin 17 into the first positioning hole 202. At this time, the plug block 15 engages with the rotating shaft 9 and the first slider 10 simultaneously. The locking mechanism 13 locks and fixes the inner folding adsorption plate 4 and the outer folding adsorption plate 5, keeping them stationary and stable when the panel to be tested 6 is installed, facilitating negative pressure adsorption fixation or adhesive fixation of the panel to be tested 6.

[0033] Please see Figure 7 , Figure 8 and Figure 9 The plug-in block 15 includes a strip plate 1501, on which a pair of mirror-arranged wedge blocks 1502 are fixedly connected. The pair of wedge blocks 1502 are used to engage with both sides of the first slider 10, restricting the lateral movement of the first slider 10. A plug-in plate 1503 is fixedly connected between the pair of wedge blocks 1502. A radial groove 901 for inserting the plug-in plate 1503 is opened at the lower end of the rotating shaft 9. A strip groove 1001 for inserting the plug-in plate 1503 is opened at the lower end of the first slider 10. When the front faces of the inner folded adsorption plate 4 and the outer folded adsorption plate 5 are facing forward, the radial groove 901 and the strip groove 1001 are aligned and connected. The plug-in plate 1503 can be inserted into the combined groove formed when the radial groove 901 and the strip groove 1001 are connected, restricting the rotation of the rotating shaft 9 and the inner folded adsorption plate 4 and the outer folded adsorption plate 5 fixed thereon.

[0034] Please see Figure 7 and Figure 8 A pair of wedge blocks 1502 have inclined surfaces on their opposite sidewalls, and the upper end of the plug plate 1503 is an arc-shaped surface.

[0035] Specifically, the pair of wedge-shaped blocks 1502 with inclined surfaces are more easily engaged on both sides of the first slider 10, and the plug plate 1503 with an arc-shaped upper end is more easily inserted into the radial groove 901 and the strip groove 1001.

[0036] Please see Figure 3The elastic pin 17 includes a plug rod 1701 that movably passes through the lifting frame 16. A gripping plate 1702 is fixedly connected to the end of the plug rod 1701. The gripping plate 1702 is slidably connected to the inner wall of the lifting frame 16. A spring 1704 is sleeved on the plug rod 1701. One end of the spring 1704 abuts against the plug rod 1701, and the other end abuts against a fixing cylinder 1703. The fixing cylinder 1703 is fixedly connected to the inner wall of the lifting frame 16.

[0037] Specifically, the lifting frame 16 is positioned by the elastic pin 17, and the lifting frame 16 limits the insertion block 15.

[0038] Please see Figure 4 and Figure 6 The extrusion mechanism 12 adopts a bidirectional lead screw module, which includes a pair of moving blocks 19 connected to a pair of extrusion plates 11. The pair of moving blocks 19 are slidably connected to a support plate 20. The support plate 20 is fixedly connected to the base 1. The pair of moving blocks 19 are threadedly connected to the same bidirectional lead screw 21. A second motor 22 is fixedly connected to the end of the bidirectional lead screw 21. The housing of the second motor 22 is fixedly connected to the outer wall of the support plate 20.

[0039] Specifically, the second motor 22 drives the bidirectional lead screw 21 to rotate, and the bidirectional lead screw 21 drives a pair of moving blocks 19 to move in opposite directions or away from each other. The pair of moving blocks 19 drives a pair of extrusion plates 11 to move in opposite directions or away from each other, thereby extruding the inner folded adsorption plate 4 and the outer folded adsorption plate 5. It should be noted that the bidirectional lead screw module can be replaced by a pair of electric push rods or a pair of hydraulic cylinders to achieve the opposite or opposite movement of the pair of extrusion plates 11.

[0040] Please see Figure 4 , Figure 5 and Figure 6 A pair of extrusion plates 11 are hinged to the inner sidewalls of each of the two connecting rods 26. The inner ends of each pair of connecting rods 26 are rotatably connected to a second slider 27. One of the second sliders 27 is slidably connected to the upper end of the inner folded adsorption plate 4, and the other second slider 27 is slidably connected to the upper end of the outer folded adsorption plate 5. The upper ends of the inner folded adsorption plate 4 and the outer folded adsorption plate 5 are provided with sliding grooves 404 for the second slider 27 to slide.

[0041] Specifically, when the panel 6 under test is unfolded, the extrusion plate 11 moves outward, and through the connecting rod 26, it provides an outward unfolding force to the inner folding adsorption plate 4 and the outer folding adsorption plate 5, so that the panel 6 under test is fully unfolded, reducing the probability of the panel 6 under test not being fully unfolded during the bending test, simulating the unfolded state of the panel 6 under test in daily use, and improving the accuracy of the bending test.

[0042] Second implementation method Based on the first implementation, please refer to Figure 1 and Figure 4An industrial camera 23 is provided above the central adsorption plate 3. The industrial camera 23 is used to detect the position and bending angle of the panel 6 to be tested. The industrial camera 23 is fixedly connected to a mounting bracket 24, which is fixedly connected to the support plate 20. The first motor 8, the second motor 22 and the industrial camera 23 are all electrically connected to the same controller (not shown in the figure).

[0043] Specifically, when the panel under test 6 is bent, the position, number of bends, and bending angle of the panel under test 6 are monitored in real time by the industrial camera 23. Based on the real-time monitoring data and the set bending parameters (number of bends and bending angle), the controller controls the rotation angle of the first motor 8 and the second motor 22 to achieve closed-loop control of precise bending. It should be noted that the controller has a touch screen for easy setting of the number of bends and bending angle. This is existing technology and will not be described in detail.

[0044] Please see Figure 4 and Figure 6 An adjustment mechanism is provided between the moving block 19 and the extrusion plate 11. The adjustment mechanism includes a mounting rod 18 fixedly connected to the moving block 19. The end of the mounting rod 18 away from the moving block 19 is rotatably connected to the extrusion plate 11. An electric push rod 25 is hinged to the side wall of the mounting rod 18. The extended end of the electric push rod 25 is hinged to the outer wall of the extrusion plate 11. The electric push rod 25 is electrically connected to the controller.

[0045] Specifically, the panel can be folded in various ways. Based on the size of the overlapping area of ​​the bending region, the existing bending shapes can be simply divided into U-shape, teardrop shape, and mushroom shape. Please refer to [link / reference needed]. Figure 10 When the extrusion plate 11 is parallel to the central adsorption plate 3 after bending, and the part of the panel to be tested 6 located on the inner adsorption plate 4 is parallel to and does not contact the part of the panel to be tested 6 located on the central adsorption plate 3, the panel to be tested 6 is in a U-shaped bend in the inner bending area. Please see Figure 10 When the extrusion plate 11 is parallel to the central adsorption plate 3, and the part of the panel 6 to be tested located on the inner fold adsorption plate 4 is in contact with the part of the panel 6 to be tested located on the central adsorption plate 3, the inner fold area of ​​the panel 6 to be tested is mushroom-shaped. Please see Figure 11 During the bending process, the electric push rod 25 drives the extrusion plate 11 to rotate and tilt. During the extrusion process, the extrusion plate 11 drives the inner folding adsorption plate 4 to rotate and tilt. At the same time, the first motor 8 drives the central adsorption plate 3 to rotate (rotation angle greater than 90 degrees and less than 180 degrees), so that the ends of the inner folding adsorption plate 4 and the central adsorption plate 3 that are away from the bending area are brought closer together, thereby making the left end of the panel to be tested 6 contact the display surface of the panel to be tested 6 located on the central adsorption plate 3. At this time, the panel to be tested 6 is bent in a teardrop shape in the inner bending area.

[0046] It should be noted that when the tilt angle of the extrusion plate 11 is not adjustable (in the first embodiment, the extrusion plate 11 is arranged longitudinally and is perpendicular to the unbent test panel 6), the final rotation angle of the central adsorption plate 3 is 90 degrees. When the tilt angle of the extrusion plate 11 is adjustable (the electric push rod 25 drives the extrusion plate 11 to rotate), the final rotation angle of the central adsorption plate 3 is greater than 0 degrees and less than 180 degrees. Those skilled in the art can choose according to actual needs.

[0047] Compared to traditional bending equipment, this invention uses an industrial camera 23 to monitor the position and bending angle of the panel 6 under test in real time, which facilitates precise control of the bending angle and the number of bends. At the same time, by using an adjustment mechanism set between the extrusion mechanism 12 and the extrusion plate 11, the tilt angle of the extrusion plate 11 can be controlled, thereby simulating various bending forms of the panel 6 under test and meeting the testing requirements of various bending forms.

[0048] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A bending test device for a foldable display panel, characterized in that, Includes a base (1), a support frame (2) is fixedly connected to the base (1), a central adsorption plate (3) is provided above the support frame (2), an inner folded adsorption plate (4) is provided on the left side of the central adsorption plate (3), and an outer folded adsorption plate (5) is provided on the right side of the central adsorption plate (3). The central adsorption plate (3), the inner folded adsorption plate (4) and the outer folded adsorption plate (5) work together to adsorb and fix the panel to be tested (6). The lower end of the central adsorption plate (3) is fixedly connected to a central rotating shaft (7), the lower end of the central rotating shaft (7) is fixedly connected to the output shaft of the first motor (8), the housing of the first motor (8) is fixedly connected to a horizontal plate (14), the horizontal plate (14) is fixedly connected to the inner wall of the support frame (2); the lower ends of the inner folding adsorption plate (4) and the outer folding adsorption plate (5) are both fixedly connected to a rotating shaft (9), the rotating shaft (9) is rotatably connected to a first slider (10), the first slider (10) is laterally slidably connected to the support frame (2); the outer sides of the inner folding adsorption plate (4) and the outer folding adsorption plate (5) are provided with a pair of symmetrically arranged extrusion plates (11), the pair of extrusion plates (11) are connected to an extrusion mechanism (12) that drives the pair of extrusion plates (11) to move towards or away from each other.

2. The bending test device for a foldable display panel according to claim 1, characterized in that, The central adsorption plate (3), the inner folded adsorption plate (4), and the outer folded adsorption plate (5) are all vacuum adsorption plates. The vacuum adsorption plate includes a plate body. A placement groove (401) for accommodating the panel to be tested (6) is opened on the front side of the plate body. A uniformly distributed suction hole (402) is opened on the placement groove (401). The suction hole (402) is connected to the same suction chamber (403). The suction chamber (403) is opened inside the plate body. The suction chamber (403) is connected to an external vacuum machine through an air pipe.

3. The bending test device for a foldable display panel according to claim 1, characterized in that, The first slider (10) is a block structure with an I-shaped cross section, and the upper end face of the support frame (2) is provided with a transverse groove (201) for the first slider (10) to slide laterally.

4. The bending test device for a foldable display panel according to claim 1, characterized in that, The horizontal plate (14) is provided with a pair of symmetrically arranged locking mechanisms (13). The locking mechanism (13) includes a plug block (15). The plug block (15) is movably engaged with the rotating shaft (9) and the first slider (10). The plug block (15) is used to restrict the rotation of the rotating shaft (9) and to restrict the lateral sliding of the first slider (10). The lower end of the plug block (15) is fixedly connected to a lifting frame (16). The lifting frame (16) movably passes through the horizontal plate (14). An elastic pin (17) is installed on the inner side of the lifting frame (16). The inner wall of the support frame (2) is provided with a first positioning hole (202) and a second positioning hole (203) that cooperate with the elastic pin (17).

5. The bending test device for a foldable display panel according to claim 4, characterized in that, The plug-in block (15) includes a strip plate (1501), on which a pair of mirror-arranged wedge blocks (1502) are fixedly connected. The pair of wedge blocks (1502) are used to engage with both sides of the first slider (10) to restrict the lateral movement of the first slider (10). A plug-in plate (1503) is fixedly connected between the pair of wedge blocks (1502). A radial groove (901) for inserting the plug-in plate (1503) is provided at the lower end of the rotating shaft (9). A strip groove (1001) for inserting the plug-in plate (1503) is provided at the lower end of the first slider (10).

6. The bending test device for a foldable display panel according to claim 5, characterized in that, The pair of wedge blocks (1502) have inclined surfaces on their opposite sidewalls, and the upper end of the plug plate (1503) is an arc-shaped surface.

7. The bending test device for a foldable display panel according to claim 1, characterized in that, The extrusion mechanism (12) adopts a bidirectional screw module, which includes a pair of moving blocks (19) connected to a pair of extrusion plates (11). The pair of moving blocks (19) are slidably connected to a support plate (20). The support plate (20) is fixedly connected to the base (1). The pair of moving blocks (19) are threadedly connected to the same bidirectional screw (21). The end of the bidirectional screw (21) is fixedly connected to a second motor (22). The housing of the second motor (22) is fixedly connected to the outer wall of the support plate (20).

8. The bending test device for a foldable display panel according to claim 1, characterized in that, A pair of extrusion plates (11) are hinged to the inner sidewalls of each pair of extrusion plates (11). The inner ends of each pair of extrusion plates (26) are rotatably connected to a second slider (27). One of the second sliders (27) is slidably connected to the upper end of the inner folded adsorption plate (4), and the other second slider (27) is slidably connected to the upper end of the outer folded adsorption plate (5). The upper ends of the inner folded adsorption plate (4) and the outer folded adsorption plate (5) are provided with sliding grooves (404) for the second slider (27) to slide.

9. The bending test device for a foldable display panel according to claim 7, characterized in that, An industrial camera (23) is provided above the central adsorption plate (3). The industrial camera (23) is used to detect the position and bending angle of the panel (6) to be tested. The industrial camera (23) is fixedly connected to a mounting bracket (24). The mounting bracket (24) is fixedly connected to the support plate (20). The first motor (8), the second motor (22) and the industrial camera (23) are all electrically connected to the same controller.

10. The bending test device for a foldable display panel according to claim 9, characterized in that, An adjustment mechanism is provided between the moving block (19) and the extrusion plate (11). The adjustment mechanism includes an installation rod (18) fixedly connected to the moving block (19). The end of the installation rod (18) away from the moving block (19) is rotatably connected to the extrusion plate (11). An electric push rod (25) is hinged to the side wall of the installation rod (18). The extended end of the electric push rod (25) is hinged to the outer wall of the extrusion plate (11). The electric push rod (25) is electrically connected to the controller.

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