Vacuum adsorption type flexible substrate IC bending reliability testing device

Abstract

The invention relates to the technical field of flexible substrate IC performance testing, and discloses a vacuum adsorption type flexible substrate IC bending reliability testing device which comprises a control box, the upper end of the control box is fixedly connected with a testing platform and a bending testing mechanism, and the bending testing mechanism comprises a placing plate. The vacuum adsorption type flexible substrate IC bending reliability testing device can effectively solve the problems that in the prior art, in the testing process, an LED soft film set is generally folded in half through extrusion force, positioning is not applied to the two ends, the reliability of the LED soft film set is affected, and the reliability of the LED soft film set is affected. The problems that the bending position and the bending angle are unstable due to the fact that an LED flexible film group, especially a flexible substrate with slight rigidity, is prone to asymmetric bending or elastic rebound due to the rigidity of the LED flexible film group in the testing process, so that the LED flexible film group slips in the testing process, and the testing repeatability is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible substrate IC performance testing, and in particular to a vacuum adsorption type flexible substrate IC bending reliability testing device. Background Art

[0002] Flexible substrate IC is an integrated circuit manufactured based on flexible material substrates such as PI and PET. It has the advantage of being bendable and foldable without affecting electrical performance. As the integration of electronic devices increases, a single flexible substrate IC is often combined with LED chips as light-emitting elements, driving circuits containing multiple modules, connecting lines responsible for signal transmission, and protective masks and bottom shells to form an LED soft film group, which is used in some flexible displays (such as foldable mobile phones, tablet computer displays or car dashboards).

[0003] Since the LED soft film group may experience repeated mechanical stress such as bending, folding, and stretching during use, it may cause problems such as fatigue of the flexible substrate IC material, metal circuit breakage, solder joint failure, and package delamination, affecting its performance and service life. To ensure product quality, bending reliability testing must be performed on samples before leaving the factory.

[0004] Currently, the most commonly used testing method is to use a bending test device to periodically apply squeezing force to both sides of the soft film group to bend and reset it. After multiple tests, the LED soft film group is detected to see if there are any cold solder joints or leaks. The above testing process has the following shortcomings: During the test, the LED soft film group is generally folded in half only by squeezing force, and the two ends are positioned only by push plates, which will lead to unstable bending position and angle. In addition, during the test, the LED soft film group, especially for slightly rigid flexible substrates, is prone to asymmetric bending or elastic rebound due to its own rigidity, causing it to slip during the test, resulting in poor test repeatability. Summary of the Invention

[0005] In response to the above-mentioned shortcomings of the prior art, the present invention provides a vacuum adsorption-type flexible substrate IC bending reliability testing device, which can effectively solve the problem in the prior art that, during testing, the LED soft film group is generally folded in half only by squeezing force without applying positioning at both ends, which will lead to unstable bending position and angle. In addition, during the test, the LED soft film group, especially for slightly rigid flexible substrates, is prone to asymmetric bending or elastic rebound due to its own rigidity, causing it to slip during the test, resulting in poor test repeatability.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A vacuum adsorption type flexible substrate IC bending reliability testing device, comprising:

[0008] A control box, the upper end of which is fixedly connected to a test platform.

[0009] The bending test mechanism includes two placement plates, which are symmetrically rotated left and right through connecting seats and arranged on the top of the test platform. A driving component that drives the two placement plates to rotate synchronously is installed in the control box.

[0010] Positioning and clamping mechanism: Both placement plates are connected with a positioning and clamping mechanism that can be used for positioning and automatic clamping to prevent slipping during testing.

[0011] The positioning clamping mechanism includes a clamping seat 1, which is fixedly connected to the test platform. The clamping seat 1 is rotatably connected to the clamping seat 2, the clamping seat 2 is connected to the positioning assembly, and the clamping seat 1 and the clamping seat 2 are commonly connected to the clamping assembly.

[0012] Furthermore, the driving assembly includes a hinge seat, which is fixedly connected to the bottom of the two placement plates. A hinge plate is rotatably connected to the hinge seat. The distance between the two hinge plates gradually increases from top to bottom, and the lower ends of the two hinge plates are connected to a lifting seat.

[0013] The lower end surface of the test platform is fixedly connected to an inner box, and the two lifting seats are connected in the inner box for sliding up and down. A through groove extending in the left and right directions is opened at the lower end of the inner box. A servo electric cylinder is slidably installed inside the control box through a linear guide rail. A push block is fixedly connected to the piston rod of the servo electric cylinder, and a magnetic design is adopted between the push block and the lifting seat.

[0014] Furthermore, the positioning assembly includes a spring sheet, and a plurality of spring sheets are evenly fixedly connected to the second vertical section of the clamping seat through fasteners. The spring sheets adopt a corrugated design and are used to position the LED soft film group in the front and rear directions.

[0015] Furthermore, the clamping assembly includes a mounting seat, and the corresponding end faces of clamping seat one and clamping seat two are fixedly connected with mounting seats, the end faces of the corresponding mounting seats are both designed with arc surfaces and mounting grooves are opened at the center of the arcs, and a clamping roller is rotatably connected in the mounting groove, and the surface of the clamping roller is fixedly covered with a rubber sleeve.

[0016] Furthermore, a guide seat is fixedly connected in the installation groove, and the end surfaces of the two guide seats that are close to each other are designed to be arc surfaces. The arc surfaces of the guide seats are provided with strip grooves corresponding to the clamping rollers.

[0017] Furthermore, the upper end surface of the horizontal section of the clamping seat 1 is symmetrically fixedly connected with a magnetic block 1, and the lower end surface of the horizontal section of the clamping seat 2 is symmetrically fixedly connected with two magnetic blocks 2 that attract each other with the magnetic block 1.

[0018] Furthermore, the test platform is fixedly connected with four limit seats in a matrix arrangement, the limit seat is fixedly connected to the edge of the lower end surface of the placement plate, and the lower end of the vertical section of the clamping seat is fixedly connected with a touch panel. The touch panel adopts a two-section design, and the direction of the straight section above the touch panel coincides with the direction of the vertical section of the clamping seat, and the lower inclined section is inclined toward the horizontal section of the clamping seat. The horizontal section of the clamping seat is also fixedly connected with a support bar to prevent it from excessive deflection.

[0019] Furthermore, a pressing frame is detachably mounted on the upper end of the second left clamping seat, and a supporting bar is detachably mounted on the left placement plate.

[0020] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0021] In the present invention, during testing, the driving component turns the inclined placement plate to a horizontal position, and the clamping seat 2 automatically rotates to be parallel to the clamping seat 1 under the action of gravity. The corrugated spring sheet of its vertical section pushes the left and right ends of the LED soft module to align in the center. At the same time, the clamping seats 1 and 2 clamp the two ends of the module through the clamping rollers with rubber sleeves, which can replace the traditional non-positioning extrusion force folding method. The spring sheet positioning and the clamping roller clamping ensure that the bending position is fixed and the module does not slip, avoiding asymmetric bending or rebound caused by stiffness, and improving test repeatability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0023] Figure 1 This is a schematic structural diagram of a vacuum adsorption type flexible substrate IC bending reliability testing device in operation according to the present invention;

[0024] Figure 2 This is a cross-sectional view of a vacuum adsorption type flexible substrate IC bending reliability testing device of the present invention;

[0025] Figure 3 This is a structural diagram of a vacuum adsorption type flexible substrate IC bending reliability testing device of the present invention;

[0026] Figure 4 This is a structural schematic diagram of a bending test mechanism in a vacuum adsorption type flexible substrate IC bending reliability test device of the present invention;

[0027] Figure 5This is a structural diagram of a clamping base 1, a clamping base 2, a clamping assembly, and a positioning assembly in a vacuum adsorption type flexible substrate IC bending reliability testing device of the present invention;

[0028] Figure 6 This is an exploded view of a first clamping seat, a second clamping seat, a clamping assembly, a positioning assembly, and a placement plate in a vacuum adsorption type flexible substrate IC bending reliability test device of the present invention;

[0029] Figure 7 This is a schematic structural diagram of a clamping seat 1, a clamping seat 2 and a spring sheet in a vacuum adsorption type flexible substrate IC bending reliability testing device of the present invention;

[0030] Figure 8 This is a state transition diagram of a vacuum adsorption type flexible substrate IC bending reliability testing device of the present invention during operation;

[0031] Figure 9 The figure is a schematic structural diagram of a pressing frame and a supporting bar in a vacuum adsorption type flexible substrate IC bending reliability testing device of the present invention.

[0032] The numbers in the figure represent: 1. Control box; 2. Test platform; 3. Bending test mechanism; 31. Placement plate; 32. Drive assembly; 321. Articulated seat; 322. Articulated plate; 323. Lifting seat; 324. Servo electric cylinder; 325. Push block; 4. Positioning and clamping mechanism; 41. Clamping seat one; 42. Clamping seat two; 43. Positioning assembly; 431. Spring sheet; 44. Clamping assembly; 441. Mounting seat; 442. Mounting groove; 443. Clamping roller; 444. Rubber sleeve; 445. Guide seat; 446. Strip groove; 447. Magnetic block one; 448. Magnetic block two; 45. Limit seat; 46. Touch panel; 47. Support bar; 5. Press frame; 6. Support bar. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 any creative efforts shall fall within the scope of protection of the present invention.

[0034] The present invention will be further described below with reference to the embodiments.

[0035] Example:

[0036] See also Figure 1 and Figure 2The present invention provides a technical solution: a vacuum adsorption type flexible substrate IC bending reliability testing device, comprising:

[0037] A control box 1 is provided, and a test platform 2 is fixedly connected to the upper end of the control box 1 .

[0038] The bending test mechanism 3 includes a placement plate 31. There are two placement plates 31, which are symmetrically rotated left and right through the connecting seat and are arranged on the top of the test platform 2. A driving component 32 for driving the two placement plates 31 to rotate synchronously is installed in the control box 1. Before the test, the two placement plates 31 are tilted downward at one end away from the mounting seat 441 under the action of the driving component 32.

[0039] Positioning and clamping mechanism 4: Both placement plates 31 are connected with a positioning and clamping mechanism 4 that can be used for positioning and automatic clamping to prevent slipping during testing.

[0040] See also Figure 2 and Figure 3 The positioning and clamping mechanism 4 includes a clamping seat 41, which is fixedly connected to the test platform 2. A clamping seat 42 is rotatably connected to the clamping seat 41. The clamping seat 42 is connected to a positioning component 43 for aligning the LED soft film group left and right. The clamping seat 41 and the clamping seat 42 are jointly connected with a clamping component 44 for clamping the LED soft film group during the test to prevent it from slipping during the test. Before the test, when both placement plates 31 are in a tilted state, the left clamping seat 42 deflects counterclockwise and the right clamping seat 42 deflects clockwise, thereby reserving sufficient placement space above the placement plate 31 to facilitate the vacuum adsorption equipment to move the LED soft film group to the placement plate 31.

[0041] In specific work, before the test is carried out, several pieces are randomly selected from the produced LED soft film group, stacked and placed in a designated area within the operating range of the vacuum adsorption equipment. Then, considering the expected application scenarios, material properties and industry standards of the LED soft film group, the bending angle and number of bends of the test device are preset.

[0042] It is worth noting that the above-mentioned vacuum adsorption equipment is an existing technology. It realizes non-contact adsorption through uniform negative pressure, which can avoid damage to the LED soft film group during the loading and unloading process. It is not shown in the figure or further explained. The purpose of this test is to test whether the performance of a certain production batch of sampled LED soft film groups meets the standards. It mainly tests the bending reliability of the LED soft film group under extreme conditions. Under the premise of reserving a certain safety margin, the number of bending times should also be set to slightly lower than the maximum number of bending times.

[0043] During the test, the LED soft film group located at the top in the designated area is transferred to the two placement plates 31 through a vacuum adsorption device to achieve rough positioning of the LED soft film group on the placement plates 31. After the rough positioning is completed, the driving component 32 is operated to first drive the two placement plates 31 from an inclined state to a horizontal state. During this process, the clamping seat 2 42 automatically rotates under the action of its own gravity, and the horizontal section of the clamping seat 2 42 and the horizontal section of the clamping seat 1 41 are parallel to each other, so that the positioning component 43 can center the left and right ends of the LED soft film group while the clamping component 44 can clamp the two ends of the LED soft film group. Under the dual action of the positioning component 43 and the clamping component 44, the LED soft film group can be effectively prevented from slipping during the test.

[0044] After the LED soft film group is positioned and clamped by the positioning component 43 and the clamping component 44, the driving component 32 continues to operate to push the two placement plates 31 to deflect upward and reset horizontally synchronously, thereby driving the LED soft film group thereon to bend upward and recover synchronously. This process is repeated many times until the preset number of bends is reached, and the bending performance test of the LED module is completed. At this time, the two placement plates 31 are both in a horizontal state. The driving component 32 is used to convert the two into the initial inclined state, thereby releasing the clamping of the LED soft film group by the positioning component 43 and the clamping component 44. Then, the tested LED soft film group is removed by the vacuum adsorption equipment, and another LED soft film group to be tested is placed on the placement plate 31. The cycle is repeated to test the bending reliability of the LED soft film group sample.

[0045] See also Figure 2 The driving assembly 32 includes a hinge seat 321, and the lower parts of the two placement plates 31 are fixedly connected to the hinge seat 321. The hinge plate 322 is rotatably connected to the hinge seat 321. The distance between the two hinge plates 322 gradually increases from top to bottom. The lower ends of the two hinge plates 322 are connected to the lifting seat 323.

[0046] The lower end face of the test platform 2 is fixedly connected to an inner box, and the two lifting seats 323 are connected in the inner box for sliding up and down. A through groove extending in the left and right directions is opened at the lower end of the inner box. A servo electric cylinder 324 is slidably installed inside the control box 1 through a linear guide rail. A push block 325 is fixedly connected to the piston rod of the servo electric cylinder 324, and a magnetic attraction design is adopted between the push block 325 and the lifting seat 323.

[0047] During specific operation, initially, the push block 325 is at the center of the through slot. After the LED soft film group to be tested is moved to the placement plate 31 by the vacuum adsorption equipment, the servo electric cylinder 324 is started, and first pushes the two lifting seats 323 to rise to a certain height synchronously through its piston rod, thereby driving the two placement plates 31 to be restored to a horizontal state synchronously through the hinged plate 322 and the hinged seat 321. Subsequently, the lifting seat 323 moves back and forth first upward and then downward at a position above the initial rising height under the push of the piston rod of the servo electric cylinder 324, thereby driving the two placement plates 31 to swing upward and reset synchronously through the hinged plate 322, thereby driving the LED soft film group thereon to cyclically bend and reset, thereby realizing the bending performance test.

[0048] It is worth mentioning that the reason for selecting the servo electric cylinder 324 as the driving element is that the servo electric cylinder 324 has high precision. By controlling the extension length of its piston rod, the upper and lower heights of the lifting seat 323 can be accurately controlled, thereby accurately controlling the swing range of the placement plate 31, and then accurately controlling the bending angle of the LED soft film group, thereby realizing reliability testing of the LED soft film group at different bending angles.

[0049] See also Figure 6 and Figure 7 The positioning component 43 includes a spring piece 431. A plurality of spring pieces 431 are evenly fixedly connected to the vertical section of the clamping seat 42 by fasteners. The spring piece 431 adopts a corrugated design and is used to position the LED soft film group in the front and rear directions.

[0050] During specific operation, the lifting seat 323 rises and drives the placement plate 31 to swing from an inclined state to a horizontal state through the hinged plate 322. The clamping seat 2 42 will automatically rotate to a state where its horizontal section is parallel to the horizontal section of the clamping seat 1 41. During this process, the spring piece 431 located on the vertical section of the clamping seat 2 42 also approaches the position of the mounting seat 441 in the horizontal direction, pushing the left and right ends of the LED soft film group on the placement plate 31, thereby achieving the effect of automatically aligning the left and right ends of the LED soft film group and positioning the position of the LED soft film group on the placement plate 31.

[0051] The advantage of adopting a corrugated design for the spring piece 431 is that, in the process of pushing the LED soft film group into position, its corrugated shape can play a certain guiding role, allowing the LED soft film group to automatically enter its trough. At the same time, due to its elastic properties, the spring piece 431 can absorb the slight length changes of the LED soft film group during the bending process, thereby preventing the LED soft film group from slipping during the test. At the same time, the maximum deformation of the spring piece 431 is greater than the change of the LED soft film group during the bending process.

[0052] See also Figure 6The clamping assembly 44 includes a mounting seat 441. The corresponding end surfaces of the clamping seat 1 41 and the clamping seat 2 42 are fixedly connected with the mounting seat 441. The end surfaces corresponding to the mounting seats 441 are both designed with an arc surface and a mounting groove 442 is opened at the center of the arc. A clamping roller 443 is rotatably connected in the mounting groove 442, and a rubber sleeve 444 is fixed on the surface of the clamping roller 443.

[0053] A guide seat 445 is fixedly connected in the mounting groove 442, and the adjacent end faces of the two guide seats 445 are designed to be arc surfaces. A strip groove 446 corresponding to the clamping roller 443 is opened on the arc surface of the guide seat 445. A magnetic block 1 447 is symmetrically fixedly connected to the upper end surface of the horizontal section of the clamping seat 1 41, and two magnetic blocks 2 448 that attract each other with the magnetic block 1 447 are symmetrically fixedly connected to the lower end surface of the horizontal section of the clamping seat 2 42.

[0054] See also Figure 5 、 Figure 7 and Figure 8 Four limit seats 45 are fixedly connected to the test platform 2 in a matrix arrangement. The limit seat 45 is fixedly connected to the edge of the lower end surface of the placement plate 31. The lower end of the vertical section of the clamping seat 42 is fixedly connected with a touch plate 46. The touch plate 46 adopts a two-section design. The direction of the straight section above the touch plate 46 coincides with the direction of the vertical section of the clamping seat 42, and the inclined section below is inclined toward the horizontal section of the clamping seat 42. The horizontal section of the clamping seat 42 is also fixedly connected with a support bar 47 to prevent it from excessive deflection.

[0055] See also Figure 1 and Figure 9 A pressing frame 5 is detachably mounted on the upper end of the left clamping seat 2 42 , and a supporting bar 6 is detachably mounted on the left placement plate 31 .

[0056] See also Figure 8 In specific operation, before the test, when the initial placement plate 31 is in an inclined state, its lower end abuts against the limit seat 45 through the support bar 47. At the same time, the horizontal section of the clamping seat 2 42 is also tilted away from the horizontal section of the clamping seat 1 41 due to the toggling action of the touch plate 46, thereby forming a giving way effect, leaving sufficient space above the placement plate 31, so that the vacuum adsorption equipment can place the LED soft film group on the placement table.

[0057] During the test, as the lifting seat 323 rises, it drives the placement plate 31 to swing from an inclined state to a horizontal state through the hinged plate 322. The clamping seat 2 42 will automatically rotate to a state where its horizontal section is parallel to the horizontal section of the clamping seat 1 41 under the combined action of its own shape (the length of the horizontal section is greater than the length of the vertical section, and the center of gravity is located on the horizontal section) and the gravity of the magnetic block 2 448. In this state, the magnetic block 1 447 and the magnetic block 2 448 attract each other, so that the clamping seat 1 41 and the clamping seat 2 42 are always in a locked state during the swinging process of the placement plate 31. The clamping seat 1 41 and the clamping seat 2 42 in the locked state will clamp the LED soft film group through the clamping roller 443 thereon and the rubber sleeve 444 on the clamping roller 443, respectively, to prevent it from slipping during the bending test.

[0058] In the above process, the reason why the mounting seat 441 adopts a curved surface design is that after the LED soft film group is placed on the placement plate 31 by means of a vacuum adsorption device, the horizontal section of the clamping seat 2 42 is rotated from an inclined state to a state parallel to the horizontal section of the clamping seat 1 41, thereby pushing the two ends of the LED soft film group to align through the spring sheet 431. In this process, the curved surface of the mounting seat 441 can play a certain guiding role, so that the end of the LED soft film group slides along the low point of its curved surface to the high point, and finally slides to the trough of the spring sheet 431.

[0059] The advantage of clamping the LED soft film group by the clamping roller 443 and the rubber sleeve 444 is that: in the process of positioning and clamping the LED by the clamping roller 443 and the rubber sleeve 444, the rubber sleeve 444 and the LED soft film group are always in line contact (that is, the contact surface between the rubber sleeve 444 and the LED soft film group is a line), and the clamping roller 443 can rotate freely. Compared with the clamping method of conventional clamping tooling with surface contact, under this clamping method, when the LED soft film group changes in length due to bending (the reason for the length change: the flexible substrate is usually made of polyimide or polyimide), the LED soft film group is not in line contact with the rubber sleeve 444. ester and other materials, which will undergo elastic deformation when bent, which may cause changes in length. According to the theory of material mechanics, when the material is bent, the outer fiber is pulled, the inner layer is compressed, and the length of the neutral layer remains unchanged. However, in actual applications, due to the anisotropy of the material or the influence of the manufacturing process, there may be slight changes in the overall length). The clamping roller 443 and the rubber sleeve 444 will automatically rotate due to the friction between the two, so that no additional tangential traction will be applied to the LED soft film group, so that the tangential displacement of the edge of the substrate is unconstrained when it is bent, making the test results closer to the real data.

[0060] The above-mentioned test can be used to test the LED soft module with the elastic substrate IC at the center. During the test, the pressing frame 5 and the support bar 6 need to be disassembled to avoid interference with the test. In actual production, due to different functions, some elastic substrate ICs are located on the side of the LED soft module. When testing this type of LED soft module, the pressing frame 5 and the support bar 6 need to be installed on the clamping seat 2 42 and the placement plate 31 on the left side respectively, and the position of the servo electric cylinder 324 on the linear guide rail is adjusted so that the pushing block is located directly below the right lifting seat 323. Afterwards, when the piston rod of the servo electric cylinder 324 is extended, it only pushes the right lifting seat 323 to move upward, thereby driving the right lifting seat 323 to swing. During this process, due to the restrictions of the pressing frame 5 and the support bar 6, the bending position of the LED soft module is transferred to the vicinity of the pressing frame 5 and the support bar 6, thereby realizing the testing of the LED soft module with the elastic substrate IC at the side.

[0061] It is worth noting that the above vacuum adsorption type flexible substrate IC bending reliability testing device has the following advantages:

[0062] Advantage 1: Convenient loading: Before the test, the two placement plates 31 are tilted downward away from the mounting seat 441 under the action of the driving assembly 32. This initial tilted state reserves sufficient space for the vacuum adsorption equipment to transfer the LED soft film group to the placement plate 31, thereby achieving rapid loading.

[0063] Advantage 2: Automatic clamping and positioning: During testing, the driving component 32 drives the placement plate 31 from tilting to horizontal, and the clamping seat 2 42 automatically rotates under the action of its own gravity, and its horizontal section is parallel to the horizontal section of the clamping seat 1 41. At this time, the spring piece 431 in the positioning component 43 centers the left and right ends of the LED soft film group, and the clamping roller 443 and rubber sleeve 444 in the clamping component 44 clamp the two ends of the LED soft film group, effectively preventing the LED soft film group from slipping during the test, and the operation process is highly automated.

[0064] Advantage 3: Precise control of bending angle: In this embodiment, a servo electric cylinder 324 is selected as the driving element. The servo electric cylinder 324 can achieve high positioning accuracy. By controlling the extension length of its piston rod, the upper and lower heights of the lifting seat 323 can be precisely controlled, thereby precisely controlling the swing range of the placement plate 31 and accurately controlling the bending angle of the LED soft film group to ensure the accuracy of the test data.

[0065] Advantage 4: More realistic test results: In this embodiment, the clamping assembly 44 adopts a design of a clamping roller 443 and a rubber sleeve 444. The rubber sleeve 444 is in line contact with the LED soft film group and the clamping roller 443 can rotate freely. When the LED soft film group changes in length due to bending, the clamping roller 443 and the rubber sleeve 444 will automatically rotate due to friction, and will not apply additional tangential traction to the LED soft film group. As a result, the tangential displacement of the edge of the LED soft film group is unconstrained when bending, and the test results are closer to real data.

[0066] Advantage 5: Improved test accuracy and versatility: The clamping roller 443 in this embodiment can help disperse the large stress generated when the LED soft film group is bent, preventing the LED soft film group from additional warping or deformation due to stress concentration, so that the LED soft film group maintains a stable shape during the test process, improving the accuracy and reliability of the test results. The clamping roller 443 combined with the spring sheet 431 can better meet diverse testing needs and enhance the versatility and flexibility of the testing device.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A vacuum adsorption type flexible substrate IC bending reliability testing device, characterized in that: include: A control box (1), the upper end of which is fixedly connected to a test platform (2); A bending test mechanism (3), the bending test mechanism (3) comprising two placement plates (31), the placement plates (31) being arranged on the top of the test platform (2) via a connecting seat and being symmetrically rotated left and right, and a driving assembly (32) for driving the two placement plates (31) to rotate synchronously installed in the control box (1); Positioning and clamping mechanism (4), both placement plates (31) are connected with a positioning and clamping mechanism (4) that can be used for positioning and automatic clamping during testing; The positioning clamping mechanism (4) includes a clamping seat 1 (41), the clamping seat 1 (41) is fixedly connected to the test platform (2), the clamping seat 1 (41) is rotatably connected to the clamping seat 2 (42), the clamping seat 2 (42) is connected to a positioning component (43), and the clamping seat 1 (41) and the clamping seat 2 (42) are commonly connected to a clamping component (44).

2. The vacuum adsorption type flexible substrate IC bending reliability testing device according to claim 1, characterized in that: The driving assembly (32) includes a hinge seat (321), the lower parts of the two placement plates (31) are fixedly connected to the hinge seat (321), the hinge plate (322) is rotatably connected to the hinge seat (321), the distance between the two hinge plates (322) gradually increases from top to bottom, and the lower ends of the two hinge plates (322) are connected to a lifting seat (323).

3. The vacuum adsorption type flexible substrate IC bending reliability testing device according to claim 2, characterized in that: The lower end surface of the test platform (2) is fixedly connected to an inner box, and the two lifting seats (323) are connected to the inner box in an upward and downward sliding manner. A through slot extending in the left and right directions is provided at the lower end of the inner box. A servo electric cylinder (324) is slidably installed inside the control box (1) via a linear guide rail. A push block (325) is fixedly connected to the piston rod of the servo electric cylinder (324), and a magnetic attraction design is adopted between the push block (325) and the lifting seat (323).

4. The vacuum adsorption type flexible substrate IC bending reliability testing device according to claim 1, characterized in that: The positioning assembly (43) includes a spring sheet (431), and a plurality of spring sheets (431) are evenly fixedly connected to the vertical section of the clamping seat (42) through fasteners. The spring sheets (431) adopt a corrugated design and are used to position the LED soft film group in the front and rear directions.

5. The vacuum adsorption type flexible substrate IC bending reliability testing device according to claim 1, characterized in that: The clamping assembly (44) includes a mounting seat (441), and the mounting seats (441) are fixedly connected to the corresponding end surfaces of the clamping seat 1 (41) and the clamping seat 2 (42). The end surfaces of the corresponding mounting seats (441) are both designed with arc surfaces and the centers of the arcs are provided with mounting grooves (442). A clamping roller (443) is rotatably connected in the mounting groove (442), and a rubber sleeve (444) is fixedly provided on the surface of the clamping roller (443).

6. The vacuum adsorption type flexible substrate IC bending reliability testing device according to claim 5, characterized in that: A guide seat (445) is fixedly connected in the installation groove (442), and the end surfaces of the two guide seats (445) that are close to each other are designed as arc surfaces. A strip groove (446) corresponding to the clamping roller (443) is opened on the arc surface of the guide seat (445).

7. The vacuum adsorption type flexible substrate IC bending reliability testing device according to claim 1, characterized in that: The upper end surface of the horizontal section of the clamping seat 1 (41) is symmetrically fixedly connected with a magnetic block 1 (447), and the lower end surface of the horizontal section of the clamping seat 2 (42) is symmetrically fixedly connected with two magnetic blocks 2 (448) that attract each other with the magnetic block 1 (447).

8. The vacuum adsorption type flexible substrate IC bending reliability testing device according to claim 1, characterized in that: Four limit seats (45) are fixedly connected to the test platform (2) in a matrix arrangement. The limit seat (45) is fixedly connected to the edge of the lower end surface of the placement plate (31). The lower end of the vertical section of the clamping seat (42) is fixedly connected to a touch plate (46). The touch plate (46) adopts a two-section design, the upper straight section coincides with the direction of the vertical section of the clamping seat (42), and the lower inclined section is inclined toward the horizontal section of the clamping seat (42), and a support bar (47) is fixedly connected to the horizontal section of the clamping seat (42) to prevent it from excessive deflection.

9. The vacuum adsorption type flexible substrate IC bending reliability testing device according to claim 1, characterized in that: A pressing frame (5) is detachably mounted on the upper end of the left clamping seat 2 (42), and a supporting strip (6) is detachably mounted on the left placement plate (31).

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