Clamping tool, bending test device and test method thereof
By using a deformation layer in the clamping fixture to uniformly distribute the clamping force, the problems of stress concentration and surface scratches in existing testing equipment are solved, thereby improving the testing reliability and accuracy of flexible displays.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANG ZHOU NEW VISION OPTO ELECTRONICS TECH
- Filing Date
- 2025-12-22
- Publication Date
- 2026-04-17
AI Technical Summary
Existing bending and torsion testing equipment suffers from stress concentration, surface scratches, and unstable clamping when holding flexible displays, which affects the accuracy of test data and may damage the screen.
The clamping fixture includes a clamping base, a deformation layer, and clamping bars. The deformation layer is composed of fluid pockets or elastic elements, which can evenly distribute the clamping force during clamping and avoid stress concentration and surface scratches.
This method achieves uniform distribution of clamping force on the surface of flexible electronic devices, avoiding localized stress concentration and surface scratches, improving the accuracy and reliability of testing, and reducing the risk of device damage.
Smart Images
Figure CN121877597A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic device testing technology, and in particular to a clamping fixture, a bending test device and a test method thereof. Background Technology
[0002] With the rapid advancement of flexible display technology, flexible displays have been widely used in products such as foldable phones, rollable TVs, and wearable devices. These devices inevitably experience repeated bending and twisting mechanical stresses during daily use. Therefore, during the research and development phase, it is crucial to conduct reliability testing on flexible displays that simulates real-world usage environments, with bending and twisting testing being a key test item. Existing bending and twisting testing equipment typically uses rigid clamps to directly hold the edges of the flexible display. This method has significant drawbacks such as stress concentration, surface scratches, and unstable clamping. Summary of the Invention
[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a clamping fixture that can avoid defects such as stress concentration, surface scratches, and unstable clamping when clamping flexible electronic devices.
[0004] This application also proposes a bending test device having the above-mentioned clamping fixture.
[0005] This application also proposes a bending test device and test method. According to one embodiment of this application, a clamping fixture includes: a clamping base for supporting a flexible electronic device; a deformation layer fixed to the clamping base, the clamping base supporting the flexible electronic device through the deformation layer; and a clamping strip for clamping the flexible electronic device together with the clamping base; wherein the deformation layer is capable of deformation to evenly distribute the clamping force of the flexible electronic device to all points of contact between the deformation layer and the flexible electronic device.
[0006] According to one embodiment of this application, a flexible pad is included, the flexible pad is fixedly disposed on the clamping base, a deformation layer is detachably disposed on the flexible pad, and the flexible pad is disposed between the deformation layer and the clamping base.
[0007] According to one embodiment of this application, the deformable layer includes a fluid sac and a filler, the fluid sac being filled with the filler, the filler being formed as a liquid and / or a gas.
[0008] According to one embodiment of this application, the fluid bag is made of polyurethane, and the fluid bag is formed by sealing the edges of two layers of polyurethane film through a heat sealing process, and the filler is silicone oil.
[0009] According to one embodiment of this application, the deformable layer includes a fixed plate and a plurality of elastic members. The elastic members are fixed to the fixed plate and are capable of elastic deformation. The clamping base clamps the flexible electronic device through the elastic members.
[0010] According to one embodiment of this application, a protective film is included, which covers the surface of the deformation layer, and one end of the protective film is provided with a tab that is not attached to the deformation layer.
[0011] According to one embodiment of this application, the deformation layer is provided with two layers, one of which is fixed to the clamping base and the other is fixed to the clamping strip, and the clamping strip clamps the flexible electronic device through the deformation layer.
[0012] A bending test apparatus according to another embodiment of this application includes: the aforementioned clamping fixture, which is provided in two sets, namely a first clamping fixture and a second clamping fixture, the first clamping fixture and the second clamping fixture being used to jointly clamp a flexible electronic device; a drive unit, which is used to output torque to the first clamping fixture and / or the second clamping fixture to cause the flexible electronic device to bend or twist between the first clamping fixture and the second clamping fixture; and a control unit, which is electrically connected to the clamping fixture and the drive unit, and is used to control the clamping fixture to clamp the flexible electronic device with a preset clamping force and to control the drive unit to output torque.
[0013] According to another embodiment of this application, a detection unit is included, which includes a torque sensor and an absolute encoder. The detection unit is electrically connected to the control unit. The torque sensor is used to provide real-time feedback on the torque of the clamping fixture bending or twisting the flexible electronic device, and the absolute encoder is used to provide real-time feedback on the rotation angle of the first clamping fixture and / or the second clamping fixture.
[0014] According to another aspect of this application, the bending test device method includes the following steps: placing a flexible electronic device on a deformation layer on one side of the clamping base of a first clamping fixture and a second clamping fixture; controlling the clamping fixture to clamp the flexible electronic device with a preset clamping force, causing the deformation layer to deform, and the deformation layer to evenly distribute the clamping force to all points in contact with the flexible electronic device; and controlling the drive unit to output torque to the clamping fixture, causing the flexible electronic device to bend or twist between the first clamping fixture and the second clamping fixture.
[0015] The clamping fixture according to the embodiments of this application has at least the following beneficial effects: when the clamping fixture clamps a flexible electronic device, the deformation layer deforms under the action of the clamping force, the deformation layer contacts and adheres to the flexible electronic device, and the deformation layer uniformly transmits the clamping force to all parts of the flexible electronic device in contact with it. The clamping force is uniformly applied to the clamped area of the flexible electronic device, thereby avoiding local stress concentration in the flexible electronic device that leads to defects caused by clamping.
[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0017] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of a clamping tool for clamping a flexible electronic device according to one embodiment of this application; Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 This is a stress diagram of a clamping fixture for clamping a flexible electronic device according to one embodiment of this application; Figure 4 This is a stress diagram illustrating the clamping fixture used to hold a flexible electronic device, which is a comparative example of this application. Figure 5 A fixing plate for a deformable layer in another embodiment; Figure 6 for Figure 5 A sectional view along section line BB; Figure 7 For elastic elements set at Figure 6 Schematic diagram of the middle fixing plate; Figure 8 This is a schematic diagram of a bending test apparatus for twisting a flexible electronic device according to another embodiment of this application. Figure 9 This is a schematic diagram of a bending test apparatus for bending a flexible electronic device according to another embodiment of this application.
[0018] Figure label: 100. Clamping fixture; 101. First clamping fixture; 102. Second clamping fixture; 110. Clamping base; 120. Flexible pad; 130. Deformation layer; 131. Fluid bag; 132. Filler; 133. Fixing plate; 1331. Fixing hole; 134. Elastic element; 135. Locking element; 140. Protective film; 141. Pull tab; 150. Clamping strip; 200. Flexible electronic devices; 300. Drive unit; 400. Detection unit; 500. Frame. Detailed Implementation
[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0020] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0021] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0022] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0023] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0024] With the rapid advancement of flexible display technology, flexible displays have been widely used in products such as foldable phones, rollable TVs, and wearable devices. These devices inevitably endure repeated bending and twisting mechanical stresses during daily use. Therefore, during the research and development phase, it is crucial to conduct reliability testing on flexible displays that simulates real-world usage environments, with bending and twisting testing being a key test item. Existing bending and twisting testing equipment typically uses rigid clamps to directly hold the edges of the flexible display. This method has the following significant drawbacks: 1. Stress Concentration: The edge of the rigid clamp will make point or line contact with the surface of the flexible display. When torque is applied, the local stress near the clamping point is extremely high, which can easily cause micro-cracks in the fine circuits, light-emitting layer or encapsulation layer inside the display, or even direct breakage.
[0025] 2. Surface scratches: The hard contact between the clamp and the display surface can easily scratch the flexible, scratch-sensitive polymer substrate or encapsulation layer of the display.
[0026] 3. Unstable clamping: In order to ensure that the screen is not damaged, existing equipment may not apply enough clamping force, which may cause relative sliding between the display screen and the fixture during the test, affecting the accuracy of the test data, or even damaging the screen due to friction.
[0027] Therefore, there is an urgent need in the field for a clamping fixture that can avoid defects such as stress concentration, surface scratches and unstable clamping when clamping flexible electronic devices.
[0028] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0029] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0030] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0031] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0032] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0033] With the rapid advancement of flexible display technology, flexible displays have been widely used in products such as foldable phones, rollable TVs, and wearable devices. These devices inevitably endure repeated bending and twisting mechanical stresses during daily use. Therefore, during the research and development phase, it is crucial to conduct reliability testing on flexible displays that simulates real-world usage environments, with bending and twisting testing being a key test item. Existing bending and twisting testing equipment typically uses rigid clamps to directly hold the edges of the flexible display. This method has the following significant drawbacks: 1. Stress Concentration: The edge of the rigid clamp will make point or line contact with the surface of the flexible display. When torque is applied, the local stress near the clamping point is extremely high, which can easily cause micro-cracks in the fine circuits, light-emitting layer or encapsulation layer inside the display, or even direct breakage.
[0034] 2. Surface scratches: The hard contact between the clamp and the display surface can easily scratch the flexible, scratch-sensitive polymer substrate or encapsulation layer of the display.
[0035] 3. Unstable clamping: In order to ensure that the screen is not damaged, existing equipment may not apply enough clamping force, which may cause relative sliding between the display screen and the fixture during the test, affecting the accuracy of the test data, or even damaging the screen due to friction.
[0036] Therefore, there is an urgent need in the field for a clamping fixture that can avoid defects such as stress concentration, surface scratches and unstable clamping when clamping flexible electronic devices 200.
[0037] The following is for reference. Figures 1 to 9 This application describes a clamping fixture, a bending test apparatus, and a test method thereof according to embodiments thereof.
[0038] Please see Figure 1 This application provides a clamping fixture, which includes two sets: a first clamping fixture 101 and a second clamping fixture 102. Each clamping fixture 100 includes a clamping base 110, a deformation layer 130, and a clamping bar 150. The clamping fixture 100 can be connected to various testing instruments through its clamping base 110. The clamping base 110, the deformation layer 130, and the clamping bar 150 are arranged sequentially, wherein the deformation layer 130 is fixed to the clamping base 110.
[0039] When the flexible electronic device 200 needs to be clamped, the deformation layer 130 and clamping base 110 of the clamping fixture 100 approach and contact the flexible electronic device 200 from one edge, while the clamping strip 150 of the clamping fixture 100 approaches and contacts the flexible electronic device 200 from the other edge, thereby achieving clamping of the flexible electronic device 200. It is understood that the flexible electronic device 200 can be a flexible OLED display, a thin-film battery, a flexible light strip, a flexible RFID tag, etc.
[0040] During the clamping process, the clamping base 110 supports the flexible electronic device 200 through the deformation layer 130, and the clamping bar 150 is attracted to the clamping base 110 to provide the clamping force required to clamp the flexible electronic device 200.
[0041] It is understandable that there are various ways in which the clamping bar 150 and the clamping base 110 can jointly clamp the flexible electronic device 200. One method is magnetic attraction, for example, the clamping base 110 may contain an electromagnet, and the clamping bar 150 itself may be made of a magnetically responsive metal material. When the electromagnet located on the clamping base 110 is energized and generates a magnetic field, the clamping bar 150 is attracted to the clamping base 110 by the magnetic force and clamps the flexible electronic device 200. In other embodiments, the clamping bar 150 may also be attracted to the clamping base 110 by vacuum adsorption.
[0042] like Figure 3As shown, when the clamping fixture 100 clamps the flexible electronic device 200, the deformation layer 130 deforms under the action of the clamping force. The deformation layer 130 contacts and adheres to the flexible electronic device 200. The deformation layer 130 evenly transmits the clamping force to all parts of its contact with the flexible electronic device 200. The clamping force is evenly applied to the clamped area of the flexible electronic device 200, thereby avoiding local stress concentration in the flexible electronic device 200, which may lead to defects caused by clamping.
[0043] In some comparative examples, such as Figure 4 As shown, since no deformation layer 130 is provided between the clamping base 110 and the clamping strip 150, when the rigid structure directly contacts and clamps the flexible electronic device 200, significant local stress concentration will occur in its edge area. This stress concentration can easily lead to microcracks or even fractures in the fine circuits, light-emitting layer or encapsulation layer inside the device, while leaving scratches on the surface of the device.
[0044] Therefore, to avoid damaging the device, existing clamping fixtures 100 often cannot apply sufficient clamping force, causing relative sliding between the device and the fixture during testing. This not only affects the accuracy of the test data but also further damages the flexible electronic device 200 due to friction.
[0045] In some embodiments, such as Figure 3 As shown, the deformable layer 130 includes a fluid bladder 131 and a filler 132. The fluid bladder 131 has a closed cavity inside, and is filled with a flowable filler 132. In other words, the filler 132 can be a liquid or a gas. When the clamping fixture 100 clamps the flexible electronic device 200, the fluid bladder 131 deforms under the pressure of the clamping bar 150 and the clamping base 110. The filler 132 inside the fluid bladder 131 flows with the deformation of the fluid bladder 131. The flowing filler 132 evenly distributes the clamping force across the entire clamping area of the flexible electronic device 200, thus forming a surface pressure on the flexible electronic device 200, preventing the clamping force from becoming a line pressure with a narrow effective area, and thereby preventing stress concentration in certain areas of the flexible electronic device 200.
[0046] Furthermore, the fluid bag 131 is made of polyurethane. The fluid bag 131 is formed by sealing the edges of two 0.2mm thick polyurethane films through a heat sealing process. Since the fluid bag 131 is formed by sealing the edges of two films, a cavity is formed inside the fluid bag 131. High-viscosity silicone oil is selected as the filler 132. Specifically, the viscosity of the silicone oil is 1000cSt. The filling amount of filler 132 in the fluid bag 131 is 90% of the cavity volume of the fluid bag 131, to ensure that it can be fully deformed when clamped and to keep the internal pressure of the fluid bag 131 within a moderate range.
[0047] In some embodiments, such as Figure 5 , Figure 6 and Figure 7 As shown, the deformation layer 130 can also be formed into another structure. The deformation layer 130 includes a fixing plate 133. The fixing plate 133 is provided with a plurality of fixing holes 1331. The plurality of fixing holes 1331 are arranged in an array on the fixing plate 133. The fixing holes 1331 are formed along the thickness direction of the fixing plate 133 and do not penetrate the fixing plate 133, forming blind holes. The cross-sectional shape of the circular hole is circular.
[0048] Correspondingly, the deformation layer 130 also includes a plurality of elastic elements 134, all of which are cylindrical. The shape of the elastic element 134 corresponds to that of the fixing hole 1331. The height of the elastic element 134 is greater than the depth of the fixing hole 1331. The elastic element 134 is installed into the fixing hole 1331, and one end of the elastic element 134 protrudes from the fixing plate 133.
[0049] Among them, the elastic element 134 is made of ultra-soft silicone rubber with a Shore A hardness of 10, and the fixing plate 133 is made of polyetheretherketone, and the fixing plate 133 has high hardness.
[0050] When clamping the flexible display, the clamping bar 150 and the clamping base 110 can adaptively and independently compress and displace according to the micro-unevenness of the surface of the flexible electronic device 200. This compression and displacement adjustment not only realizes the real-time adaptive distribution of clamping force to ensure that the clamping force is evenly distributed in the clamping area, but also effectively avoids damage to the flexible electronic device 200 caused by stress concentration while ensuring stable clamping.
[0051] In addition, by using elastic element 134 and fixing plate 133 as deformation layer 130, the risk of leakage of filling material 132 in the fluid bag 131 can be effectively avoided, resulting in higher mechanical reliability.
[0052] In some embodiments, such as Figure 1 and Figure 2 As shown, the clamping fixture 100 also includes a flexible pad 120, which is fixedly disposed on the clamping base 110. The deformation layer 130 is detachably disposed on the flexible pad 120, and the flexible pad 120 is disposed between the deformation layer 130 and the clamping base 110.
[0053] In other words, the flexible pad 120 is disposed between the deformable layer 130 and the clamping base 110. The flexible pad 120 is made of an elastic material, such as silicone rubber, polyurethane, or foam metal. The flexible pad 120 is permanently bonded to the clamping base 110 by a high-strength adhesive, such as 3MDP100 series epoxy resin. The flexible pad 120 can provide a soft transition between the deformable layer 130 and the rigid clamping base 110, avoiding hard contact between the deformable layer 130 and the clamping base 110, especially avoiding defects such as fluid leakage caused by hard contact between the deformable layer 130, which forms a fluid pocket 131, and the clamping base 110.
[0054] Understandably, the deformable layer 130 is detachably disposed on the flexible pad 120 to allow the operator to replace or maintain the deformable layer 130. There are several ways in which the deformable layer 130 is disposed on the flexible pad 120. For example, the deformable layer 130 may have a locking member 135 at its edge, which is fixed to the deformable layer 130. The locking member 135 is formed as a part with a threaded through hole, and the flexible pad 120 has a corresponding threaded hole. The locking member 135 and the flexible pad 120 can be connected together using screws. Alternatively, the deformable layer 130 and the flexible pad 120 can be connected together by providing elastically deformable clips on both the deformable layer 130 and the flexible pad 120 respectively.
[0055] In some embodiments, such as Figure 1 and Figure 2 As shown, the clamping fixture 100 also includes a protective film 140, which is a 0.125mm thick transparent PET film covering the outer surface of the deformation layer 130. The protective film 140 has pull tabs 141 at both ends that are not attached to the deformation layer 130, which can be easily replaced by the operator before and after each test to ensure that the clamping surface of the clamping fixture 100 is clean and dust-free for each test, and to prevent contamination or micro-scratches to the flexible electronic device 200.
[0056] In some embodiments, the deformation layer 130 is provided with two layers, one of which is fixed to the clamping base 110 and the other is fixed to the clamping strip 150, so that the clamping strip 150 indirectly clamps the flexible electronic device 200 through the deformation layer 130. Based on this structure, when the clamping fixture 100 clamps the flexible electronic device 200, both opposite sides of the flexible electronic device 200 can obtain effective buffering and adaptive fit through the corresponding deformation layer 130, which enhances the overall uniformity and stability of the clamping force and further reduces the risk of damage to the flexible electronic device 200 caused by clamping.
[0057] Another embodiment of this application also proposes a bending test device, such as... Figure 8 and Figure 9As shown, it includes a frame 500, a drive unit 300, and a control unit. The frame 500 is formed into a cuboid frame structure. There are two drive units 300, which are respectively arranged at both ends of the frame 500 along the long side. Each drive unit 300 is connected to a set of clamping fixtures 100. The drive unit 300 is used to output torque to the clamping fixtures 100 to make the flexible electronic device 200 bend or twist between the first clamping fixture 101 and the second clamping fixture 102. In addition, the bending test device also includes a control unit, which can control the clamping fixtures 100 to clamp the flexible electronic device 200 with a preset clamping force and control the output torque of the drive unit 300.
[0058] In some embodiments, the bending test device includes a detection unit 400, which includes a torque sensor and an absolute encoder. Both the torque sensor and the absolute encoder are mounted within a drive unit 300. The detection unit 400 is electrically connected to a control unit. The torque sensor provides real-time feedback on the torque of the clamping fixture 100 when bending or twisting the flexible electronic device 200. The absolute encoder provides real-time feedback on the rotation angles of the first clamping fixture 101 and the second clamping fixture 102. The control unit includes a human-machine interface touchscreen. The control unit receives information from the torque sensor and the absolute encoder and displays it to the operator in real-time via the touchscreen.
[0059] Understandably, the operator can adjust the clamping force of the first clamping fixture 101 and the second clamping fixture 102 through the human-machine interface touch screen, and the drive unit 300 can drive the rotation angle of the first clamping fixture 101 and the second clamping fixture 102.
[0060] It is worth noting that the control unit's program includes a multi-stage clamping process. When the flexible electronic device 200 needs to be clamped, the control unit first applies a very small preload force, such as 10N, to ensure smooth contact between the clamping fixture 100 and the flexible electronic device 200. Then, it slowly increases the clamping force at a very low loading rate, such as 1 N / s, until the torque sensor detects a critical state where the relative slippage between the clamping fixture 100 and the flexible electronic device 200 disappears. The entire process is executed automatically by the control unit, keeping the clamping force within the range required for reliable clamping. This method not only avoids overpressure on the flexible electronic device 200 but also reduces the mechanical load on the equipment during clamping, helping to extend the service life of critical components such as deformable parts.
[0061] In view of this, another aspect of this application discloses a bending test device and a testing method, which uses the above-mentioned bending test device and includes the following steps: S1 places the flexible electronic device 200 on the deformation layer 130 on one side of the clamping base 110 of the first clamping fixture 101 and the second clamping fixture 102; S2 adjusts the clamping force of the first clamping fixture 101 and the second clamping fixture 102 through the human-machine interface touch screen of the control unit, and the drive unit 300 drives the rotation angle of the first clamping fixture 101 and the second clamping fixture 102. The S3 control unit controls the clamping fixture 100 to clamp the flexible electronic device 200 with a preset clamping force, causing the flexible pad 120 and the deformation layer 130 to deform. The deformation layer 130 distributes the clamping force evenly to all parts of the deformation layer 130 that come into contact with the flexible electronic device 200. The S4 control unit controls the drive unit 300 to output torque to the first clamping fixture 101 and the second clamping fixture 102, so that the flexible electronic device 200 bends or twists between the first clamping fixture 101 and the second clamping fixture 102 until the first clamping fixture 101 and the second clamping fixture 102 rotate to a preset rotation angle, at which point the drive unit 300 stops outputting torque for 1 second. The S5 control unit controls the drive unit 300 to output a torque opposite to that in step S4, causing the flexible electronic device 200 to bend or twist between the first clamping fixture 101 and the second clamping fixture 102 in the opposite direction to step S4, until the first clamping fixture 101 and the second clamping fixture 102 rotate to the opposite rotation angle to step S4, at which point the drive unit 300 stops outputting torque for 1 second. S6 repeats steps S4 to S5 until the preset number of runs is completed, at which point the device stops operating.
[0062] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.
Claims
1. A clamping tool, characterized in that, include: Clamping base for supporting flexible electronic devices; A deformation layer is fixed to the clamping base, and the clamping base supports the flexible electronic device through the deformation layer; Clamping strips are used together with the clamping base to clamp flexible electronic devices; The deformation layer is capable of deformation to uniformly distribute the clamping force holding the flexible electronic device to all points where the deformation layer contacts the flexible electronic device.
2. The clamping fixture of claim 1, wherein It includes a flexible pad layer, which is fixedly disposed on the clamping base, and a deformation layer is detachably disposed on the flexible pad layer, with the flexible pad layer disposed between the deformation layer and the clamping base.
3. The clamping fixture according to claim 1, characterized in that, The deformable layer includes a fluid sac and a filler, wherein the fluid sac is filled with the filler, which is formed as a liquid and / or a gas.
4. The clamping fixture according to claim 3, characterized in that, The fluid bag is made of polyurethane and is formed by sealing the edges of two layers of polyurethane film through a heat-sealing process. The filler is silicone oil.
5. The clamping fixture according to claim 1, characterized in that, The deformation layer includes a fixed plate and multiple elastic elements. The elastic elements are fixed to the fixed plate and are capable of elastic deformation. The clamping base clamps the flexible electronic device through the elastic elements.
6. The clamping fixture according to claim 1, characterized in that, It includes a protective film that covers the surface of the deformation layer, and one end of the protective film is provided with a tab that is not attached to the deformation layer.
7. The clamping fixture according to claim 1, characterized in that, The deformation layer has two layers, one of which is fixed to the clamping base, and the other is fixed to the clamping strip. The clamping strip clamps the flexible electronic device through the deformation layer.
8. A bending test device, characterized in that, include: The clamping fixture as described in any one of claims 1-7 is provided in two sets, namely a first clamping fixture and a second clamping fixture, wherein the first clamping fixture and the second clamping fixture are used to jointly clamp the flexible electronic device. A drive unit is configured to output torque to the first clamping fixture and / or the second clamping fixture to cause the flexible electronic device to bend or twist between the first clamping fixture and the second clamping fixture; The control unit is electrically connected to the clamping fixture and the drive unit. The control unit is used to control the clamping fixture to clamp the flexible electronic device with a preset clamping force and to control the output torque of the drive unit.
9. The bending test apparatus according to claim 8, characterized in that, The device includes a detection unit, which comprises a torque sensor and an absolute encoder. The detection unit is electrically connected to the control unit. The torque sensor is used to provide real-time feedback on the torque of the flexible electronic device when the clamping fixture bends or twists. The absolute encoder is used to provide real-time feedback on the rotation angle of the first clamping fixture and / or the second clamping fixture.
10. A bending test device and test method, characterized in that, Using the bending test apparatus as described in any one of claims 8-9 includes the following steps: The flexible electronic device is placed on the deformation layer on one side of the clamping base of the first clamping fixture and the second clamping fixture; The control unit controls the clamping fixture to clamp the flexible electronic device with a preset clamping force, causing the deformation layer to deform, and the deformation layer to evenly distribute the clamping force to all points where the deformation layer contacts the flexible electronic device; The control unit controls the drive unit to output torque to the clamping fixture, causing the flexible electronic device to bend or twist between the first clamping fixture and the second clamping fixture.