A flexible screen degree of freedom bending fatigue test method, device, equipment and medium

Abstract

The present application relates to the technical field of display device testing, and particularly relates to a flexible screen freedom degree bending fatigue test method, device, equipment and medium, the method comprises the following steps: installing a to-be-tested flexible screen sample between a first clamp and a second clamp; performing baseline calibration on an electrical monitoring component, an optical monitoring component and a deformation monitoring component connected with the to-be-tested flexible screen sample to obtain baseline test information; controlling a multi-axis motion loading mechanism to apply a multi-freedom degree composite stress to the to-be-tested flexible screen sample according to a composite bending test spectrum to obtain a corresponding performance change result of the to-be-tested flexible screen sample; identifying corresponding performance inflection point information of the to-be-tested flexible screen sample according to the performance change result; and determining a test end point result corresponding to the to-be-tested flexible screen sample according to the performance inflection point information and a failure threshold.

Description

Technical Field

[0001] This invention relates to the technical field of display device testing, and in particular to a method, apparatus, equipment, and medium for testing the degree of freedom bending fatigue of a flexible screen. Background Technology

[0002] With the continuous development of flexible display products, flexible screens are subject to various effects such as bending, twisting, and compression during actual use. Therefore, fatigue performance testing of flexible screens has gradually become an important part of product development and performance evaluation.

[0003] In existing technologies, testing methods for flexible screens mainly focus on single bending tests, with relatively fixed test conditions, making it difficult to reflect the stress changes of flexible screens under complex usage conditions. Furthermore, the existing testing processes use relatively simple methods to determine the performance status of flexible screens, making it difficult to conduct a more comprehensive analysis and judgment of performance changes during the testing process. Summary of the Invention

[0004] To address the issues of limited testing methods and incomplete analysis of test results in existing flexible screen technologies, this invention provides a method, apparatus, equipment, and medium for testing the bending fatigue of flexible screens.

[0005] The above-mentioned objective of this invention is achieved through the following technical solution:

[0006] A method for testing the bending fatigue of a flexible screen, comprising:

[0007] The flexible screen sample to be tested is installed between the first fixture and the second fixture, and the electrical monitoring component, optical monitoring component and deformation monitoring component connected to the flexible screen sample to be tested are calibrated to obtain the benchmark test information.

[0008] Set the composite bending test spectrum and failure threshold corresponding to the flexible screen sample to be tested;

[0009] The multi-axis motion loading mechanism is controlled to apply multi-degree-of-freedom composite stress to the flexible screen sample under test according to the composite bending test spectrum.

[0010] During the application of the multi-degree-of-freedom composite stress, the electrical performance parameters, optical performance parameters and deformation parameters of the flexible screen sample under test are simultaneously collected according to the preset triggering conditions.

[0011] The electrical performance parameters, optical performance parameters, and deformation parameters are compared with the benchmark test information to obtain the performance change results of the flexible screen sample under test.

[0012] Based on the performance change results, identify the performance inflection point information corresponding to the flexible screen sample under test;

[0013] Based on the performance inflection point information and the failure threshold, the test endpoint result corresponding to the flexible screen sample under test is determined.

[0014] By adopting the above technical solution, the flexible screen sample can be installed and calibrated first, then a composite bending test spectrum and failure threshold can be set, and a multi-axis motion loading mechanism can be controlled to apply multi-degree-of-freedom composite stress to the flexible screen sample. At the same time, electrical performance parameters, optical performance parameters, and deformation parameters are collected simultaneously during the loading process. Then, each parameter is compared with the benchmark test information to obtain the performance change results, and further performance inflection point information is identified. Finally, the test endpoint result is determined by combining the failure threshold. This not only enables synchronous monitoring and continuous analysis of the multi-dimensional performance changes of the flexible screen sample during the test, but also more accurately identifies the performance transition stage and termination time of the flexible screen sample under complex stress conditions, thereby improving the comprehensiveness, accuracy, and reliability of the fatigue test of the flexible screen.

[0015] Preferably, the step of mounting the flexible screen sample to be tested between the first fixture and the second fixture, and performing benchmark calibration on the electrical monitoring component, optical monitoring component, and deformation monitoring component connected to the flexible screen sample to obtain benchmark test information includes:

[0016] The multi-axis motion loading mechanism is controlled to drive the flexible screen sample under test to sequentially reach multiple preset calibration postures;

[0017] The monitoring results of the electrical monitoring component, the optical monitoring component, and the deformation monitoring component under each of the preset calibration postures are obtained respectively;

[0018] Based on the monitoring results corresponding to each preset calibration posture, determine the posture reference parameters corresponding to the electrical monitoring component, the optical monitoring component, and the deformation monitoring component, respectively;

[0019] The attitude reference parameters are correlated to generate the reference test information.

[0020] By adopting the above technical solution, the multi-axis motion loading mechanism can be controlled to drive the flexible screen sample under test to reach multiple preset calibration postures in sequence. Then, the monitoring results of the electrical monitoring component, optical monitoring component, and deformation monitoring component under each preset calibration posture are obtained. Based on the monitoring results under each preset calibration posture, the posture reference parameters corresponding to each monitoring component are determined. Finally, the posture reference parameters are correlated to generate benchmark test information, so that the benchmark test information can correspond to the parameter state under different preset calibration postures, thereby improving the pertinence of the subsequent parameter comparison process and the accuracy of the benchmark reference.

[0021] Preferably, setting the composite bending test spectrum and failure threshold corresponding to the flexible screen sample under test includes:

[0022] Multiple test action units are defined, and each test action unit corresponds to a different multi-degree-of-freedom loading action;

[0023] Based on the action intensity and action type of each test action unit, determine the action priority information corresponding to each test action unit;

[0024] Based on the priority information of each action, the order of each test action unit is arranged, and the motion trajectory, motion speed, dwell time and number of cycles corresponding to each test action unit are set respectively to obtain the composite bending test spectrum;

[0025] Based on the action priority information, threshold change requirements are set for the electrical performance parameters, optical performance parameters and deformation parameters, respectively.

[0026] The failure threshold is determined based on the threshold change requirements described above.

[0027] By adopting the above technical solution, multiple test action units corresponding to different multi-degree-of-freedom loading actions can be set first. Then, the action priority information is determined according to the action intensity and action type of each test action unit. The order of each test action unit is arranged according to the action priority information. At the same time, the motion trajectory, motion speed, dwell time and number of cycles corresponding to each test action unit are set to obtain the composite bending test spectrum. Subsequently, the threshold change requirements corresponding to electrical performance parameters, optical performance parameters and deformation parameters are set according to the action priority information, and the failure threshold is further determined. This enables the construction process of the composite bending test spectrum to correspond with the setting process of the failure threshold, thereby improving the systematicness of the bending fatigue test process, the matching of parameter settings and the rationality of test judgment.

[0028] Preferably, during the application of the multi-degree-of-freedom composite stress, the simultaneous acquisition of electrical performance parameters, optical performance parameters, and deformation parameters of the flexible screen sample under test according to preset triggering conditions includes:

[0029] Obtain the current position and current cycle state of the multi-axis motion loading mechanism during the execution of the composite bending test spectrum;

[0030] Based on the current position status, determine whether the multi-axis motion loading mechanism has reached the target acquisition position of the corresponding test action unit;

[0031] If the judgment result indicates that the multi-axis motion loading mechanism has reached the target acquisition position, it is further determined whether the holding time of the multi-axis motion loading mechanism at the target acquisition position has reached the preset stable acquisition time.

[0032] If the judgment result indicates that the holding time has reached the preset stable acquisition time, the synchronous acquisition of the electrical performance parameters, optical performance parameters and deformation parameters corresponding to the flexible screen sample under test is triggered.

[0033] Based on the current loop state, determine whether the current loop count has reached the preset loop acquisition condition;

[0034] If the judgment result indicates that the current cycle count has reached the preset cycle acquisition condition, the synchronous acquisition of the electrical performance parameters, optical performance parameters and deformation parameters corresponding to the flexible screen sample under test is triggered.

[0035] By adopting the above technical solution, the current position and current cycle state of the multi-axis motion loading mechanism during the execution of the composite bending test spectrum can be obtained first. Then, based on the current position state, it can be determined whether the target acquisition position of the corresponding test action unit has been reached. If the target acquisition position has been reached, it can be further determined whether the holding time at the target acquisition position has reached the preset stable acquisition time. After the holding time reaches the preset stable acquisition time, the synchronous acquisition of the electrical performance parameters, optical performance parameters, and deformation parameters corresponding to the flexible screen sample under test is triggered. At the same time, it can also be determined whether the current cycle count has reached the preset cycle acquisition condition based on the current cycle state. When the current cycle count reaches the preset cycle acquisition condition, the synchronous acquisition of electrical performance parameters, optical performance parameters, and deformation parameters is triggered. Thus, the timing of parameter acquisition can be controlled from two dimensions: position state and cycle state, thereby improving the flexibility, synchronization, and effectiveness of test data acquisition in the parameter acquisition process.

[0036] Preferably, the step of comparing the electrical performance parameters, the optical performance parameters, and the deformation parameters with the benchmark test information to obtain the performance change results corresponding to the flexible screen sample under test includes:

[0037] Extract electrical reference information corresponding to the electrical performance parameters, optical reference information corresponding to the optical performance parameters, and deformation reference information corresponding to the deformation parameters from the benchmark test information;

[0038] The electrical performance parameters are compared with the electrical reference information to obtain electrical difference results; the optical performance parameters are compared with the optical reference information to obtain optical difference results; and the deformation parameters are compared with the deformation reference information to obtain deformation difference results.

[0039] Based on the synchronous acquisition relationship corresponding to the electrical performance parameters, optical performance parameters, and deformation parameters, the electrical difference results, optical difference results, and deformation difference results are jointly mapped to obtain parameter change correlation results;

[0040] Based on the correlation results of the parameter changes, the performance change results corresponding to the flexible screen sample under test are determined.

[0041] By adopting the above technical solution, it is possible to first extract electrical reference information corresponding to electrical performance parameters, optical reference information corresponding to optical performance parameters, and deformation reference information corresponding to deformation parameters from the benchmark test information. Then, the differences between electrical performance parameters and electrical reference information are extracted to obtain electrical difference results, the differences between optical performance parameters and optical reference information are extracted to obtain optical difference results, and the differences between deformation parameters and deformation reference information are extracted to obtain deformation difference results. Subsequently, according to the synchronous acquisition relationship between electrical performance parameters, optical performance parameters, and deformation parameters, the electrical difference results, optical difference results, and deformation difference results are jointly mapped to obtain parameter change correlation results. Furthermore, the performance change results corresponding to the flexible screen sample under test are determined based on the parameter change correlation results. Thus, it is possible to establish the correspondence between different parameter changes based on the extraction of various parameter differences, thereby improving the completeness and multi-dimensional analysis capability of the performance change result determination process.

[0042] Preferably, identifying the performance inflection point information corresponding to the flexible screen sample under test based on the performance change results includes:

[0043] Extract the electrical performance change results corresponding to the electrical performance parameters, the optical performance change results corresponding to the optical performance parameters, and the deformation performance change results corresponding to the deformation parameters according to the synchronous acquisition sequence.

[0044] Based on the sequential relationship between the electrical performance change results, the optical performance change results, and the deformation performance change results during the continuous acquisition process, the multi-parameter response order results are determined.

[0045] Based on the multi-parameter response order results, determine whether a preset order offset state is formed between the electrical performance change results, the optical performance change results, and the deformation performance change results;

[0046] If the judgment result indicates that the preset order offset state has been formed, the information at the corresponding collection location will be determined as the performance inflection point information.

[0047] By adopting the above technical solution, the electrical performance change results corresponding to electrical performance parameters, the optical performance change results corresponding to optical performance parameters, and the deformation performance change results corresponding to deformation parameters can be extracted first according to the synchronous acquisition sequence. Then, the multi-parameter response order results are determined based on the response sequence relationship of the electrical performance change results, optical performance change results, and deformation performance change results during the continuous acquisition process. Subsequently, based on the multi-parameter response order results, it is determined whether a preset order offset state is formed between the electrical performance change results, optical performance change results, and deformation performance change results. If a preset order offset state is formed, the information at the corresponding acquisition position is determined as the performance inflection point information. Thus, the performance inflection point can be identified by combining the response sequence changes between multiple types of performance change results, thereby improving the accuracy of the performance inflection point identification process and the characterization ability of multi-dimensional performance anomalies.

[0048] Preferably, determining the test endpoint result corresponding to the flexible screen sample under test based on the performance inflection point information and the failure threshold includes:

[0049] Based on the performance inflection point information, determine the monitoring interval after the inflection point of the flexible screen sample to be tested;

[0050] Extract the performance change results corresponding to the monitoring interval after the inflection point;

[0051] Based on the performance change results within the monitoring interval after the inflection point, it is determined whether the flexible screen sample under test is in a state of continuous degradation.

[0052] If the judgment result indicates that the flexible screen sample under test is in the continuous degradation state, continue to judge whether the performance change result has reached the failure threshold;

[0053] If the judgment result indicates that the performance change has reached the failure threshold, the test endpoint result corresponding to the flexible screen sample under test is determined;

[0054] If the assessment result indicates that the performance change has not reached the failure threshold, the fatigue test continues.

[0055] When the number of test cycles corresponding to the flexible screen sample under test reaches the preset maximum number of cycles, the test endpoint result corresponding to the flexible screen sample under test is determined.

[0056] By adopting the above technical solution, the monitoring interval after the inflection point of the flexible screen sample under test can be determined first based on the performance inflection point information. Then, the corresponding performance change results within the monitoring interval after the inflection point are extracted. Based on the performance change results within the monitoring interval after the inflection point, it is determined whether the flexible screen sample under test is in a state of continuous degradation. If the determination result indicates that the flexible screen sample under test is in a state of continuous degradation, it is further determined whether the performance change result has reached the failure threshold. When the performance change result reaches the failure threshold, the test endpoint result corresponding to the flexible screen sample under test is determined. If the performance change result has not reached the failure threshold, fatigue testing continues. At the same time, when the number of test cycles reaches the preset maximum number of cycles, the test endpoint result corresponding to the flexible screen sample under test is also determined. Thus, the subsequent degradation process can be continuously tracked by combining the performance inflection point information, and the test endpoint determination is completed when the failure condition is reached or the preset maximum number of cycles is reached. This improves the rationality of the test endpoint determination process and the completeness of the fatigue testing process.

[0057] The second objective of this invention is achieved through the following technical solution:

[0058] A flexible screen bending fatigue testing device, the flexible screen bending fatigue testing device comprising:

[0059] The installation calibration module is used to install the flexible screen sample to be tested between the first fixture and the second fixture, and to perform benchmark calibration on the electrical monitoring component, optical monitoring component and deformation monitoring component connected to the flexible screen sample to be tested, so as to obtain benchmark test information.

[0060] The spectrum setting module is used to set the composite bending test spectrum and failure threshold corresponding to the flexible screen sample under test;

[0061] The stress loading module is used to control the multi-axis motion loading mechanism to apply multi-degree-of-freedom composite stress to the flexible screen sample under test according to the composite bending test spectrum.

[0062] The synchronous acquisition module is used to synchronously acquire the electrical performance parameters, optical performance parameters and deformation parameters of the flexible screen sample under test according to preset triggering conditions during the application of the multi-degree-of-freedom composite stress.

[0063] The change analysis module is used to compare the electrical performance parameters, optical performance parameters and deformation parameters with the benchmark test information to obtain the performance change results of the flexible screen sample under test.

[0064] The inflection point identification module is used to identify the performance inflection point information corresponding to the flexible screen sample under test based on the performance change results.

[0065] The endpoint determination module is used to determine the test endpoint result corresponding to the flexible screen sample under test based on the performance inflection point information and the failure threshold.

[0066] By adopting the above technical solution, the flexible screen sample can be installed and calibrated first, then a composite bending test spectrum and failure threshold can be set, and a multi-axis motion loading mechanism can be controlled to apply multi-degree-of-freedom composite stress to the flexible screen sample. At the same time, electrical performance parameters, optical performance parameters, and deformation parameters are collected simultaneously during the loading process. Then, each parameter is compared with the benchmark test information to obtain the performance change results, and further performance inflection point information is identified. Finally, the test endpoint result is determined by combining the failure threshold. This not only enables synchronous monitoring and continuous analysis of the multi-dimensional performance changes of the flexible screen sample during the test, but also more accurately identifies the performance transition stage and termination time of the flexible screen sample under complex stress conditions, thereby improving the comprehensiveness, accuracy, and reliability of the fatigue test of the flexible screen.

[0067] The above-mentioned objective three of the present invention is achieved through the following technical solution:

[0068] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described flexible screen degree-of-freedom bending fatigue test method.

[0069] The above-mentioned objective four of the present invention is achieved through the following technical solution:

[0070] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the above-described flexible screen degree-of-freedom bending fatigue test method.

[0071] In summary, the present invention has at least one of the following beneficial technical effects:

[0072] The system can first install and calibrate the flexible screen sample, then set the composite bending test spectrum and failure threshold, and control the multi-axis motion loading mechanism to apply multi-degree-of-freedom composite stress to the flexible screen sample. Simultaneously, electrical performance parameters, optical performance parameters, and deformation parameters are collected during the loading process. The parameters are then compared with the benchmark test information to obtain the performance change results, and further performance inflection point information is identified. Finally, the test endpoint result is determined by combining the failure threshold. This not only enables synchronous monitoring and continuous analysis of the multi-dimensional performance changes of the flexible screen sample during the test, but also more accurately identifies the performance transition stage and termination time of the flexible screen sample under complex stress conditions, thereby improving the comprehensiveness, accuracy, and reliability of the fatigue test of the flexible screen. Attached Figure Description

[0073] Figure 1 This is a flowchart of a flexible screen bending fatigue test method according to an embodiment of the present invention.

[0074] Figure 2 This is a schematic diagram of a flexible screen bending fatigue testing device according to an embodiment of the present invention. Detailed Implementation

[0075] The present invention will be further described in detail below with reference to the accompanying drawings.

[0076] In one embodiment, such as Figure 1 As shown, this invention discloses a method for testing the bending fatigue of a flexible screen, specifically including the following steps:

[0077] S10: Install the flexible screen sample to be tested between the first fixture and the second fixture, and perform benchmark calibration on the electrical monitoring component, optical monitoring component and deformation monitoring component connected to the flexible screen sample to be tested to obtain benchmark test information.

[0078] In this embodiment, the flexible screen sample under test refers to a flexible display component used to perform bending fatigue testing. The first clamp and the second clamp refer to components respectively disposed on both sides of the flexible screen sample under test for positioning and clamping and fixing the flexible screen sample under test. The electrical monitoring component refers to a component used to acquire electrical state information of the flexible screen sample under test during the test. The optical monitoring component refers to a component used to acquire optical state information of the flexible screen sample under test during the test. The deformation monitoring component refers to a component used to acquire deformation information of the flexible screen sample under test during the test. The benchmark calibration refers to the process of calibrating and recording the initial monitoring states of the electrical monitoring component, the optical monitoring component, and the deformation monitoring component before the formal test begins. The benchmark test information refers to the reference information obtained through benchmark calibration that characterizes the initial state of the flexible screen sample under test.

[0079] Specifically, when installing the flexible screen sample under test between the first and second clamps, the sample is first moved to a preset installation area between the first and second clamps. The sample is then aligned along its length and width, ensuring that both sides correspond to the clamping positions of the first and second clamps. The first and second clamps are then used to clamp and fix both ends of the sample, maintaining a preset installation posture between them. After installation, the electrical monitoring component, optical monitoring component, and deformation monitoring component are connected to the sample. The sample is then sequentially moved to multiple preset calibration postures, and monitoring results are obtained for each posture. The posture reference parameters for each posture are then determined based on the monitoring results. Finally, the posture reference parameters are correlated to obtain the benchmark test information.

[0080] S20: Set the composite bending test spectrum and failure threshold corresponding to the flexible screen sample to be tested.

[0081] In this embodiment, the composite bending test spectrum refers to the test information set for the flexible screen sample under test, which characterizes multiple bending actions and corresponding execution conditions during the bending test. The execution conditions include bending method, motion trajectory, motion speed, dwell time, and number of cycles. The failure threshold refers to the parameter limit information used to determine whether the flexible screen sample under test has reached a failure state during the bending test.

[0082] Specifically, when setting the composite bending test spectrum and failure threshold for the flexible screen sample under test, multiple bending actions are first determined according to the test requirements of the flexible screen sample under test. For each bending action, the corresponding bending method, motion trajectory, motion speed, dwell time, and number of cycles are set. Then, the bending actions are arranged and combined in a preset order to obtain the composite bending test spectrum for the flexible screen sample under test. After obtaining the composite bending test spectrum, the allowable variation range of each parameter is determined by combining the electrical performance parameters, optical performance parameters, and deformation parameters that need to be monitored for the flexible screen sample under test. Based on the allowable variation range of each parameter, the failure threshold for the flexible screen sample under test is generated.

[0083] S30: Control the multi-axis motion loading mechanism to apply multi-degree-of-freedom composite stress to the flexible screen sample under test according to the composite bending test spectrum.

[0084] In this embodiment, the multi-axis motion loading mechanism refers to the mechanism used to drive the flexible screen sample under test to perform loading actions in multiple motion directions, and the multi-degree-of-freedom composite stress refers to the stress state formed by the combination of multiple directions and multiple forms acting on the flexible screen sample under test during the execution of multiple bending actions corresponding to the composite bending test spectrum.

[0085] Specifically, when the multi-axis motion loading mechanism applies multi-degree-of-freedom composite stress to the flexible screen sample under test according to the composite bending test spectrum, it first reads the bending mode, motion trajectory, motion speed, dwell time, and number of cycles corresponding to each bending action in the composite bending test spectrum. Then, it generates the corresponding action execution sequence according to the arrangement order of each bending action in the composite bending test spectrum. Next, it controls the multi-axis motion loading mechanism to drive the relative positions of the first and second clamps to change sequentially according to the action execution sequence, so that the flexible screen sample under test forms the corresponding bending, torsion, or local stress state at different action stages. During the execution of each bending action, the motion direction of the multi-axis motion loading mechanism is controlled according to the corresponding motion trajectory, the displacement change rate of the multi-axis motion loading mechanism is controlled according to the corresponding motion speed, the holding time of the multi-axis motion loading mechanism at the target position is controlled according to the corresponding dwell time, and the corresponding bending action is repeated according to the corresponding number of cycles, so that the flexible screen sample under test continuously bears the multi-degree-of-freedom composite stress corresponding to the composite bending test spectrum throughout the entire test process.

[0086] S40: During the application of multi-degree-of-freedom composite stress, the electrical performance parameters, optical performance parameters and deformation parameters of the flexible screen sample under test are collected synchronously according to the preset triggering conditions.

[0087] In this embodiment, the preset trigger condition refers to the triggering rule used to limit the execution of parameter acquisition actions. The triggering rule is used to characterize when to start parameter acquisition of the flexible screen sample under test during the application of multi-degree-of-freedom composite stress. Electrical performance parameters refer to parameters used to characterize the changes in the electrical state of the flexible screen sample under test. Optical performance parameters refer to parameters used to characterize the changes in the optical state of the flexible screen sample under test. Deformation parameters refer to parameters used to characterize the changes in the deformation of the flexible screen sample under test during the stress process. Synchronous acquisition refers to the processing method of acquiring electrical performance parameters, optical performance parameters, and deformation parameters at the same triggering time and mapping them to the same acquisition time.

[0088] Specifically, during the application of multi-degree-of-freedom composite stress, when simultaneously acquiring the electrical performance parameters, optical performance parameters, and deformation parameters of the flexible screen sample under test according to preset trigger conditions, the current position state and current cycle state are continuously read during the execution of each bending action corresponding to the composite bending test spectrum by the multi-axis motion loading mechanism. Then, the current position state and current cycle state are matched and judged according to the preset trigger conditions. When the current position state indicates that the multi-axis motion loading mechanism has reached the target acquisition position, it is further judged whether the holding time of the multi-axis motion loading mechanism at the target acquisition position has reached the preset stable acquisition time. When the holding time reaches the preset stable acquisition time, the electrical monitoring component connected to the flexible screen sample under test is controlled to acquire the current acquisition time. The system controls the optical monitoring components connected to the flexible screen sample under test to acquire the optical performance parameters corresponding to the current acquisition time, and controls the deformation monitoring components connected to the flexible screen sample under test to acquire the deformation parameters corresponding to the current acquisition time. When the current cycle state indicates that the current cycle count has reached the preset cycle acquisition condition, the system acquires the electrical performance parameters, optical performance parameters, and deformation parameters corresponding to the current cycle count in the same way as the target acquisition position trigger. Each time acquisition is triggered, the electrical performance parameters, optical performance parameters, and deformation parameters are assigned the same acquisition time identifier, and the electrical performance parameters, optical performance parameters, and deformation parameters are stored accordingly according to the same acquisition time identifier to complete the synchronous acquisition of electrical performance parameters, optical performance parameters, and deformation parameters.

[0089] S50: The electrical performance parameters, optical performance parameters, and deformation parameters are compared with the benchmark test information to obtain the performance change results of the flexible screen sample under test.

[0090] In this embodiment, the performance change result refers to the parameter change information obtained by performing corresponding comparisons of electrical performance parameters, optical performance parameters, and deformation parameters with reference test information. The parameter change information is used to characterize the changes of the flexible screen sample under test relative to the reference state at the current acquisition time.

[0091] Specifically, when comparing the electrical performance parameters, optical performance parameters, and deformation parameters with reference test information to obtain the performance change results corresponding to the flexible screen sample under test, the following steps are taken: First, electrical reference information corresponding to the electrical performance parameters, optical reference information corresponding to the optical performance parameters, and deformation reference information corresponding to the deformation parameters are extracted from the reference test information. Then, the electrical performance parameters corresponding to the current acquisition time are compared item by item with the electrical reference information to determine the parameter differences between the electrical performance parameters and the electrical reference information, thus obtaining the electrical difference results. Similarly, the optical performance parameters corresponding to the current acquisition time are compared item by item with the optical reference information to determine the parameter differences between the optical performance parameters and the optical reference information, thus obtaining the optical difference results. Finally, the deformation parameters corresponding to the current acquisition time are compared item by item with the deformation reference information to determine the parameter differences between the deformation parameters and the deformation reference information, thus obtaining the deformation difference results. Subsequently, according to the synchronous acquisition relationship of the electrical performance parameters, optical performance parameters, and deformation parameters, the electrical difference results, optical difference results, and deformation difference results are correlated accordingly, and the correlated results are determined as the performance change results corresponding to the flexible screen sample under test.

[0092] S60: Based on the performance change results, identify the performance inflection point information corresponding to the flexible screen sample under test.

[0093] In this embodiment, the performance inflection point information refers to the information corresponding to a significant change in the performance state characterized by the performance change results during the testing process of the flexible screen sample under test.

[0094] Specifically, when identifying the performance inflection point information of the flexible screen sample under test based on the performance change results, the performance change results are first arranged in the order corresponding to each acquisition time, so that the performance change results form a continuous change relationship with the acquisition time. Then, the performance change results corresponding to adjacent acquisition times are read in sequence, and the performance change results corresponding to the later acquisition time are compared with the performance change results corresponding to the previous acquisition time to determine whether the performance change state of the flexible screen sample under test has changed from the previous stage to the next stage during the continuous acquisition process. During the comparison process, if the performance change results corresponding to adjacent acquisition times show a continuous increase in the degree of change, or if the performance change results corresponding to adjacent acquisition times change from the original change state to another change state, then the corresponding acquisition time is determined as the position where the performance change has changed, and the performance change result corresponding to that acquisition time and the position information corresponding to that acquisition time are extracted as the performance inflection point information of the flexible screen sample under test.

[0095] S70: Based on the performance inflection point information and failure threshold, determine the test endpoint result corresponding to the flexible screen sample under test.

[0096] In this embodiment, the test endpoint result refers to the judgment result made on whether the flexible screen sample under test has reached the test termination condition based on the performance inflection point information and the failure threshold.

[0097] Specifically, when determining the test endpoint result for the flexible screen sample under test based on the performance inflection point information and failure threshold, the acquisition time corresponding to the performance inflection point information is first read, and the performance change results corresponding to each acquisition time after the acquisition time are extracted. Then, the performance change results corresponding to each acquisition time after the acquisition time are compared with the failure threshold item by item to determine whether there are any parameter changes in the performance change results that reach the failure threshold. During the comparison process, if the performance change result corresponding to any acquisition time reaches the failure threshold, then that acquisition time is determined as the endpoint determination time, and the determination result corresponding to the endpoint determination time is determined as the test endpoint result. If the performance change results corresponding to each acquisition time after the acquisition time do not reach the failure threshold, then the performance change results corresponding to subsequent acquisition times are read and compared with the failure threshold, until the test endpoint result corresponding to the flexible screen sample under test is determined.

[0098] In one embodiment, in step S10, the flexible screen sample to be tested is mounted between the first fixture and the second fixture, and the electrical monitoring component, optical monitoring component, and deformation monitoring component connected to the flexible screen sample are calibrated to obtain benchmark test information, including:

[0099] S101: Control the multi-axis motion loading mechanism to drive the flexible screen sample under test to reach multiple preset calibration postures in sequence.

[0100] In this embodiment, the preset calibration posture refers to the posture state information of the flexible screen sample under test in different position states that is preset in order to perform the benchmark calibration.

[0101] Specifically, when the multi-axis motion loading mechanism drives the flexible screen sample under test to sequentially reach multiple preset calibration postures, the position parameters and posture parameters corresponding to the multiple preset calibration postures are first read. Then, a posture switching sequence is generated according to the arrangement order of the multiple preset calibration postures. Subsequently, the multi-axis motion loading mechanism is controlled to adjust the relative position relationship between the first fixture and the second fixture according to the posture switching sequence, so that the flexible screen sample under test gradually switches from the current posture to the next preset calibration posture during each position adjustment. After the flexible screen sample under test reaches each preset calibration posture, the multi-axis motion loading mechanism is controlled to maintain the corresponding position for a preset time so that the flexible screen sample under test maintains a stable state under the preset calibration posture. Then, the multi-axis motion loading mechanism is controlled to continue to drive the flexible screen sample under test to switch to the next preset calibration posture until the flexible screen sample under test sequentially reaches multiple preset calibration postures.

[0102] S102: Acquire the monitoring results of the electrical monitoring component, optical monitoring component and deformation monitoring component under each preset calibration posture.

[0103] In this embodiment, the monitoring results refer to the parameter information obtained by the electrical monitoring component, the optical monitoring component, and the deformation monitoring component under each preset calibration posture.

[0104] Specifically, when acquiring the monitoring results of the electrical monitoring component, optical monitoring component, and deformation monitoring component under each preset calibration posture, the process begins as follows: After the flexible screen sample under test reaches one of the preset calibration postures and maintains a stable state, the electrical monitoring component is controlled to detect the electrical state of the flexible screen sample under test under the current preset calibration posture to obtain the electrical monitoring result corresponding to the current preset calibration posture. The optical monitoring component is controlled to detect the optical state of the flexible screen sample under test under the current preset calibration posture to obtain the optical monitoring result corresponding to the current preset calibration posture. The deformation monitoring component is controlled to detect the deformation state of the flexible screen sample under test under the current preset calibration posture to obtain the deformation monitoring result corresponding to the current preset calibration posture. Then, the electrical monitoring result, optical monitoring result, and deformation monitoring result corresponding to the current preset calibration posture are recorded in correspondence with the current preset calibration posture. Subsequently, after the flexible screen sample under test switches to the next preset calibration posture and maintains a stable state, the electrical monitoring result, optical monitoring result, and deformation monitoring result corresponding to the next preset calibration posture are acquired in the same manner, until the monitoring results corresponding to each preset calibration posture are acquired.

[0105] S103: Based on the monitoring results corresponding to each preset calibration attitude, determine the attitude reference parameters corresponding to the electrical monitoring component, optical monitoring component, and deformation monitoring component, respectively.

[0106] In this embodiment, the attitude reference parameters refer to the reference parameter information corresponding to the electrical monitoring component, optical monitoring component, and deformation monitoring component under each preset calibration attitude.

[0107] Specifically, when determining the attitude reference parameters corresponding to the electrical monitoring component, optical monitoring component, and deformation monitoring component based on the monitoring results corresponding to each preset calibration posture, the electrical monitoring results, optical monitoring results, and deformation monitoring results corresponding to each preset calibration posture are first classified and organized according to the distinction relationship corresponding to each preset calibration posture. Then, under each preset calibration posture, the electrical parameter information in the electrical monitoring results, the optical parameter information in the optical monitoring results, and the deformation parameter information in the deformation monitoring results are extracted respectively. The electrical parameter information is determined as the attitude reference parameter corresponding to the electrical monitoring component under the current preset calibration posture, the optical parameter information is determined as the attitude reference parameter corresponding to the optical monitoring component under the current preset calibration posture, and the deformation parameter information is determined as the attitude reference parameter corresponding to the deformation monitoring component under the current preset calibration posture. Subsequently, the attitude reference parameters corresponding to the electrical monitoring component, the optical monitoring component, and the deformation monitoring component are recorded respectively according to each preset calibration posture to complete the determination of the attitude reference parameters corresponding to the electrical monitoring component, the optical monitoring component, and the deformation monitoring component.

[0108] S104: Correlate the various attitude reference parameters to generate benchmark test information.

[0109] In this embodiment, association refers to the process of matching and combining the corresponding attitude reference parameters according to the attitude distinction relationship corresponding to each preset calibration attitude.

[0110] Specifically, when generating benchmark test information by associating various attitude reference parameters, the attitude reference parameters corresponding to the electrical monitoring component, the optical monitoring component, and the deformation monitoring component are read in the order corresponding to each preset calibration attitude. Then, using the same preset calibration attitude as the basis, the attitude reference parameters corresponding to the electrical monitoring component, the optical monitoring component, and the deformation monitoring component under the same preset calibration attitude are combined to obtain the reference parameter groups corresponding to each preset calibration attitude. Subsequently, according to the distinction relationship corresponding to each preset calibration attitude, each reference parameter group is centrally recorded, and a correspondence relationship is established between each reference parameter group and the corresponding preset calibration attitude. Finally, the reference parameter groups after establishing the correspondence relationship are determined as benchmark test information.

[0111] In one embodiment, step S20, namely setting the composite bending test spectrum and failure threshold corresponding to the flexible screen sample to be tested, includes:

[0112] S201: Set up multiple test action units, each of which corresponds to a different multi-degree-of-freedom loading action.

[0113] In this embodiment, the test action unit refers to the basic action unit used to characterize the content of a single loading action in the composite bending test spectrum, and the multi-degree-of-freedom loading action refers to the loading action in different directions and different forms applied to the flexible screen sample under test by a multi-axis motion loading mechanism.

[0114] Specifically, when setting up multiple test action units, each corresponding to different multi-degree-of-freedom loading actions, first determine the multiple loading action contents that need to be included in the composite bending test spectrum according to the bending test requirements of the flexible screen sample under test. Then, establish corresponding test action units according to the distinction relationship of each loading action content, and assign corresponding multi-degree-of-freedom loading action identifiers to each test action unit so that each test action unit corresponds to different multi-degree-of-freedom loading actions. Finally, record each test action unit independently according to the multi-degree-of-freedom loading action content corresponding to each test action unit to complete the setting of multiple test action units.

[0115] S202: Determine the action priority information corresponding to each test action unit based on the action intensity and action type of each test action unit.

[0116] In this embodiment, the action intensity refers to the loading degree information formed when the multi-degree-of-freedom loading action corresponding to each test action unit acts on the flexible screen sample under test; the action type refers to the category information of the multi-degree-of-freedom loading action corresponding to each test action unit in terms of action mode; and the action priority information refers to the order information determined according to the action intensity and action type corresponding to each test action unit, which is used to characterize the sequential configuration relationship of each test action unit in the composite bending test spectrum.

[0117] Specifically, when determining the action priority information of each test action unit based on its action intensity and action type, the multi-degree-of-freedom loading action content of each test action unit is first read, and the loading degree of each test action unit is distinguished to determine the action intensity of each test action unit. Then, the loading action method of each test action unit is distinguished to determine the action type of each test action unit. After determining the action intensity and action type of each test action unit, the action intensity and action type of each test action unit are combined accordingly, and the test action units are arranged in order according to the distinction results after combination to obtain the action priority information of each test action unit.

[0118] S203: Arrange the order of each test action unit according to the priority information of each action, and set the motion trajectory, motion speed, dwell time and number of cycles for each test action unit to obtain the composite bending test spectrum.

[0119] In this embodiment, the arrangement order refers to the process of determining the sequential relationship of each test action unit in the composite bending test spectrum based on the priority information of each action. The motion trajectory refers to the motion path information of each test action unit during execution. The motion speed refers to the position change rate information of each test action unit during execution. The dwell time refers to the duration information of each test action unit maintaining the current action state after reaching the corresponding target position. The number of cycles refers to the number of times each test action unit is repeatedly executed in the composite bending test spectrum.

[0120] Specifically, based on the priority information of each action, the order of each test action unit is arranged, and the motion trajectory, speed, dwell time, and number of cycles corresponding to each test action unit are set. When obtaining the composite bending test spectrum, the action priority information corresponding to each test action unit is first read, and the test action units are arranged sequentially according to the order relationship of the action priority information to form a test action sequence. Then, a corresponding motion trajectory is set for each test action unit in the test action sequence to determine the motion path of the test action unit during execution. Next, a corresponding motion speed is set for each test action unit to determine the speed of position change during execution. Then, a corresponding dwell time is set for each test action unit to determine the duration of the test action unit after reaching the corresponding target position. Finally, a corresponding number of cycles is set for each test action unit to determine the number of times the test action unit is repeatedly executed in the composite bending test spectrum. Finally, the test action units that have completed the arrangement and have completed the setting of motion trajectory, speed, dwell time, and number of cycles are sequentially combined to obtain the composite bending test spectrum.

[0121] S204: Based on the priority information of each action, set the threshold change requirements corresponding to the electrical performance parameters, optical performance parameters and deformation parameters respectively.

[0122] In this embodiment, the threshold change requirement refers to the allowable parameter change limits for electrical performance parameters, optical performance parameters, and deformation parameters under different test action unit conditions.

[0123] Specifically, when setting threshold change requirements for electrical performance parameters, optical performance parameters, and deformation parameters based on the priority information of each action, the action priority information of each test action unit is first read, and each test action unit is distinguished according to the order of the action priority information. Then, the parameter attention range of electrical performance parameters, optical performance parameters, and deformation parameters under the corresponding test conditions is extracted for each test action unit. Based on the action priority information of each test action unit, corresponding change limits are set for electrical performance parameters, optical performance parameters, and deformation parameters. Among them, stricter change limits are set for electrical performance parameters, optical performance parameters, and deformation parameters corresponding to test action units with higher action priority information, and change limits are set for electrical performance parameters, optical performance parameters, and deformation parameters corresponding to test action units with lower action priority information that match their corresponding action conditions. Subsequently, the change limits of electrical performance parameters, optical performance parameters, and deformation parameters corresponding to each test action unit are recorded separately to obtain the threshold change requirements for electrical performance parameters, optical performance parameters, and deformation parameters.

[0124] S205: Determine the failure threshold based on the requirements for each threshold change.

[0125] Specifically, when determining the failure threshold based on the threshold change requirements, the threshold change requirements for electrical performance parameters, optical performance parameters, and deformation parameters corresponding to each test action unit are first read. Then, the threshold change requirements are classified and organized according to the parameter categories of electrical performance parameters, optical performance parameters, and deformation parameters to form a set of threshold requirements corresponding to electrical performance parameters, optical performance parameters, and deformation parameters. Subsequently, boundary determination processing is performed on the corresponding threshold requirement sets under each parameter category to determine the failure thresholds corresponding to electrical performance parameters, optical performance parameters, and deformation parameters. Finally, the failure thresholds corresponding to electrical performance parameters, optical performance parameters, and deformation parameters are summarized to obtain the failure threshold.

[0126] In one embodiment, in step S40, i.e., during the application of multi-degree-of-freedom composite stress, the electrical performance parameters, optical performance parameters, and deformation parameters of the flexible screen sample under test are synchronously acquired according to preset triggering conditions, including:

[0127] S401: Obtain the current position and current cycle state of the multi-axis motion loading mechanism during the execution of the compound bending test spectrum.

[0128] In this embodiment, the current position state refers to the position state information of the multi-axis motion loading mechanism at the current moment during the execution of the composite bending test spectrum, and the current cycle state refers to the cycle execution state information of the multi-axis motion loading mechanism at the current moment during the execution of the composite bending test spectrum.

[0129] Specifically, when acquiring the current position and current cycle state of the multi-axis motion loading mechanism during the execution of the composite bending test spectrum, the following steps are taken: First, the arrangement order, motion trajectory, motion speed, dwell time, and number of cycles corresponding to each test action unit in the composite bending test spectrum are read. Then, the multi-axis motion loading mechanism is controlled to execute the corresponding action according to the test action sequence corresponding to the composite bending test spectrum. During the execution of each test action unit by the multi-axis motion loading mechanism, the position parameters corresponding to the multi-axis motion loading mechanism at the current moment are continuously acquired. Based on the position parameters, the current position state of the multi-axis motion loading mechanism during the execution of the composite bending test spectrum is determined. At the same time, the cycle execution information corresponding to the multi-axis motion loading mechanism at the current moment is continuously read. Based on the cycle execution information, the current cycle state of the multi-axis motion loading mechanism during the execution of the composite bending test spectrum is determined. Subsequently, the current position and current cycle states are recorded respectively to complete the acquisition of the current position and current cycle states.

[0130] S402: Based on the current position status, determine whether the multi-axis motion loading mechanism has reached the target acquisition position of the corresponding test action unit.

[0131] In this embodiment, the target acquisition position refers to the preset position status information used to trigger parameter acquisition during the execution of the corresponding test action unit.

[0132] Specifically, when determining whether the multi-axis motion loading mechanism has reached the target acquisition position of the corresponding test action unit based on the current position status, the target acquisition position corresponding to the currently executed test action unit is first read, and the corresponding position status information in the current position status is extracted. Then, the position status information is compared with the target acquisition position to determine whether the current position status is consistent with the target acquisition position. When the position status information is consistent with the target acquisition position, it is determined that the multi-axis motion loading mechanism has reached the target acquisition position of the corresponding test action unit. When the position status information is inconsistent with the target acquisition position, it is determined that the multi-axis motion loading mechanism has not reached the target acquisition position of the corresponding test action unit.

[0133] S403: If the judgment result indicates that the multi-axis motion loading mechanism has reached the target acquisition position, continue to judge whether the holding time of the multi-axis motion loading mechanism at the target acquisition position has reached the preset stable acquisition time.

[0134] In this embodiment, the holding time refers to the duration during which the multi-axis motion loading mechanism maintains its current position information at the target acquisition position without switching, and the preset stable acquisition time refers to the minimum time preset in order to enable the flexible screen sample under test to enter a stable acquisition state at the target acquisition position.

[0135] Specifically, when the judgment result indicates that the multi-axis motion loading mechanism has reached the target acquisition position, and further judgment is made on whether the holding time of the multi-axis motion loading mechanism at the target acquisition position has reached the preset stable acquisition time, the corresponding duration measurement process is first started at the moment when the judgment result indicates that the multi-axis motion loading mechanism has reached the target acquisition position, and the current position status of the multi-axis motion loading mechanism at subsequent moments is continuously read to determine whether the multi-axis motion loading mechanism continues to be located at the target acquisition position. If the multi-axis motion loading mechanism continues to be located at the target acquisition position, the duration from the arrival time to the current time is accumulated to obtain the holding time of the multi-axis motion loading mechanism at the target acquisition position. Then, the holding time is compared with the preset stable acquisition time. When the holding time reaches the preset stable acquisition time, it is determined that the holding time of the multi-axis motion loading mechanism at the target acquisition position has reached the preset stable acquisition time. When the holding time does not reach the preset stable acquisition time, it is determined that the holding time of the multi-axis motion loading mechanism at the target acquisition position has not reached the preset stable acquisition time.

[0136] S404: When the judgment result indicates that the holding time has reached the preset stable acquisition time, the synchronous acquisition of the electrical performance parameters, optical performance parameters and deformation parameters corresponding to the flexible screen sample under test is triggered.

[0137] In this embodiment, triggering refers to initiating the control process for acquiring electrical performance parameters, optical performance parameters, and deformation parameters after the condition of maintaining the duration reaches the preset stable acquisition duration is met.

[0138] Specifically, when the judgment result indicates that the holding time has reached the preset stable acquisition time, and the synchronous acquisition of the electrical performance parameters, optical performance parameters, and deformation parameters corresponding to the flexible screen sample under test is triggered, the judgment result corresponding to the holding time reaching the preset stable acquisition time is responded to first, and the corresponding acquisition start command is generated. Then, the acquisition start command is sent to the electrical monitoring component, optical monitoring component, and deformation monitoring component connected to the flexible screen sample under test, so that the electrical monitoring component acquires the electrical performance parameters corresponding to the flexible screen sample under test at the current acquisition time, the optical monitoring component acquires the optical performance parameters corresponding to the flexible screen sample under test at the current acquisition time, and the deformation monitoring component acquires the deformation parameters corresponding to the flexible screen sample under test at the current acquisition time. After the acquisition of the electrical performance parameters, optical performance parameters, and deformation parameters is completed, the current acquisition time is used as the corresponding time information and assigned to the electrical performance parameters, optical performance parameters, and deformation parameters respectively. The electrical performance parameters, optical performance parameters, and deformation parameters with the same corresponding time information are recorded accordingly to complete the synchronous acquisition of the electrical performance parameters, optical performance parameters, and deformation parameters corresponding to the flexible screen sample under test.

[0139] S405: Based on the current loop status, determine whether the current loop count has reached the preset loop acquisition condition.

[0140] In this embodiment, the preset loop acquisition condition refers to the loop number information used to limit when parameter acquisition is triggered during loop execution.

[0141] Specifically, when determining whether the current number of cycles has reached the preset cycle acquisition condition based on the current cycle state, the cycle count information corresponding to the current moment is first extracted from the current cycle state. Then, the preset cycle acquisition condition is read and compared with the cycle count information to determine whether the current number of cycles corresponding to the current cycle state meets the preset cycle acquisition condition. When the cycle count information reaches the number requirement corresponding to the preset cycle acquisition condition, it is determined that the current number of cycles has reached the preset cycle acquisition condition. When the cycle count information does not reach the number requirement corresponding to the preset cycle acquisition condition, it is determined that the current number of cycles has not reached the preset cycle acquisition condition.

[0142] S406: When the judgment result indicates that the current cycle count has reached the preset cycle acquisition condition, the synchronous acquisition of the electrical performance parameters, optical performance parameters and deformation parameters corresponding to the flexible screen sample under test is triggered.

[0143] In this embodiment, triggering refers to initiating the control process for collecting electrical performance parameters, optical performance parameters, and deformation parameters after the current cycle count reaches the preset cycle acquisition condition.

[0144] Specifically, when the judgment result indicates that the current cycle count has reached the preset cycle acquisition condition, and the synchronous acquisition of the electrical performance parameters, optical performance parameters, and deformation parameters corresponding to the flexible screen sample under test is triggered, the system first responds to the judgment result corresponding to the current cycle count reaching the preset cycle acquisition condition, generates the corresponding cycle acquisition start command, and then sends the cycle acquisition start command to the electrical monitoring component, optical monitoring component, and deformation monitoring component connected to the flexible screen sample under test, respectively. This allows the electrical monitoring component to acquire the electrical performance parameters corresponding to the flexible screen sample under test at the acquisition time corresponding to the current cycle count, and the optical monitoring component to acquire the electrical performance parameters corresponding to the current cycle count at the acquisition time. The optical performance parameters of the flexible screen sample under test are acquired at the acquisition time corresponding to the current number of cycles. The deformation monitoring component acquires the deformation parameters of the flexible screen sample under test at the acquisition time corresponding to the current number of cycles. After acquiring the electrical performance parameters, optical performance parameters, and deformation parameters, the acquisition time corresponding to the current number of cycles is used as the corresponding time information and assigned to the electrical performance parameters, optical performance parameters, and deformation parameters respectively. The electrical performance parameters, optical performance parameters, and deformation parameters with the same corresponding time information are recorded accordingly to complete the synchronous acquisition of the electrical performance parameters, optical performance parameters, and deformation parameters of the flexible screen sample under test.

[0145] In one embodiment, in step S50, the electrical performance parameters, optical performance parameters, and deformation parameters are compared with the benchmark test information to obtain the performance change results corresponding to the flexible screen sample under test, including:

[0146] S501: Extract electrical reference information corresponding to electrical performance parameters, optical reference information corresponding to optical performance parameters, and deformation reference information corresponding to deformation parameters from the reference test information.

[0147] In this embodiment, electrical reference information refers to reference information that corresponds one-to-one with electrical performance parameters in the reference test information; optical reference information refers to reference information that corresponds one-to-one with optical performance parameters in the reference test information; and deformation reference information refers to reference information that corresponds one-to-one with deformation parameters in the reference test information.

[0148] Specifically, when extracting electrical reference information corresponding to electrical performance parameters, optical reference information corresponding to optical performance parameters, and deformation reference information corresponding to deformation parameters from the benchmark test information, the benchmark parameter groups corresponding to each preset calibration posture in the benchmark test information are first read. Based on the acquisition relationship associated with the electrical performance parameters, optical performance parameters, and deformation parameters at the current acquisition time, the parameter content corresponding to each parameter category in the benchmark parameter group is classified and located. Then, the parameter content corresponding to the electrical performance parameters in terms of parameter category and parameter item is extracted from the benchmark parameter group as electrical reference information. Similarly, the parameter content corresponding to the optical performance parameters in terms of parameter category and parameter item is extracted from the benchmark parameter group as optical reference information. Finally, the parameter content corresponding to the deformation parameters in terms of parameter category and parameter item is extracted from the benchmark parameter group as deformation reference information. Subsequently, the electrical reference information, optical reference information, and deformation reference information are respectively associated with the corresponding electrical performance parameters, optical performance parameters, and deformation parameters to complete the extraction of electrical reference information, optical reference information, and deformation reference information.

[0149] S502: Extract the differences between electrical performance parameters and electrical reference information to obtain electrical difference results; extract the differences between optical performance parameters and optical reference information to obtain optical difference results; extract the differences between deformation parameters and deformation reference information to obtain deformation difference results.

[0150] In this embodiment, difference extraction refers to the process of comparing the currently acquired parameters under the same parameter category with the corresponding reference parameters to determine the parameter differences between them. Electrical difference results refer to the parameter difference information formed by electrical performance parameters relative to electrical reference information. Optical difference results refer to the parameter difference information formed by optical performance parameters relative to optical reference information. Deformation difference results refer to the parameter difference information formed by deformation parameters relative to deformation reference information.

[0151] Specifically, the differences between electrical performance parameters and electrical reference information are extracted to obtain electrical difference results; the differences between optical performance parameters and optical reference information are extracted to obtain optical difference results; and the differences between deformation parameters and deformation reference information are extracted to obtain deformation difference results. First, according to parameter category, the electrical performance parameters, optical performance parameters, and deformation parameters corresponding to the current acquisition time are read separately. Then, the electrical reference information corresponding to the electrical performance parameters, the optical reference information corresponding to the optical performance parameters, and the deformation reference information corresponding to the deformation parameters are read separately. Finally, under the electrical parameter category, the electrical performance parameters and electrical reference information are compared item by item according to the parameter item correspondence. To determine the differences in parameters corresponding to each electrical parameter item, the electrical difference results are recorded. Then, under the optical parameter category, the optical performance parameters are compared item by item with the optical reference information according to the parameter item correspondence to determine the differences in parameters corresponding to each optical parameter item, and the optical difference results are recorded. Similarly, under the deformation parameter category, the deformation parameters are compared item by item with the deformation reference information according to the parameter item correspondence to determine the differences in parameters corresponding to each deformation parameter item, and the deformation difference results are recorded.

[0152] S503: Based on the synchronous acquisition relationship of electrical performance parameters, optical performance parameters and deformation parameters, perform joint mapping on the electrical difference results, optical difference results and deformation difference results to obtain the parameter change correlation results.

[0153] In this embodiment, synchronous acquisition relationship refers to the correspondence established between electrical performance parameters, optical performance parameters, and deformation parameters at the same acquisition time. Joint mapping refers to the process of matching and associating electrical difference results, optical difference results, and deformation difference results according to the synchronous acquisition relationship. Parameter change association result refers to the result information obtained through joint mapping, which is used to characterize the correspondence between multiple types of parameter difference changes at the same acquisition time.

[0154] Specifically, based on the synchronous acquisition relationship corresponding to electrical performance parameters, optical performance parameters, and deformation parameters, the electrical difference results, optical difference results, and deformation difference results are jointly mapped to obtain the parameter change correlation results. First, the acquisition time identifiers corresponding to the electrical performance parameters, optical performance parameters, and deformation parameters during the synchronous acquisition process are read, and the synchronous acquisition relationship between the electrical performance parameters, optical performance parameters, and deformation parameters is determined according to each acquisition time identifier. Then, the electrical difference results, optical difference results, and deformation difference results corresponding to each acquisition time identifier are read respectively. Using the same acquisition time identifier as the correspondence basis, the electrical difference results, optical difference results, and deformation difference results under the same acquisition time are matched. Then, the electrical difference results, optical difference results, and deformation difference results that have completed the matching are associated and combined according to the parameter category correspondence relationship to form the difference result combination corresponding to each acquisition time. Finally, the combination of each difference result is determined as the parameter change correlation result.

[0155] S504: Based on the correlation results of parameter changes, determine the performance change results of the flexible screen sample under test.

[0156] In this embodiment, the parameter change correlation result refers to the result information formed by the corresponding combination of electrical difference result, optical difference result and deformation difference result at the same acquisition time. The performance change result refers to the result information determined based on the parameter change correlation result, which is used to characterize the overall performance change state of the flexible screen sample under test at the current acquisition time.

[0157] Specifically, when determining the performance change results of the flexible screen sample under test based on the parameter change correlation results, the parameter change correlation results are first read according to the distinction relationship corresponding to each acquisition time. Then, the electrical difference results, optical difference results, and deformation difference results corresponding to each acquisition time are sorted out as a whole to clarify the corresponding changes of the flexible screen sample under test in electrical state, optical state, and deformation state at the current acquisition time. Subsequently, the electrical difference results, optical difference results, and deformation difference results after the overall sorting at the same acquisition time are centrally determined to form the comprehensive change state information corresponding to that acquisition time. Finally, the comprehensive change state information corresponding to each acquisition time is determined as the performance change results of the flexible screen sample under test.

[0158] In one embodiment, step S60, namely, identifying the performance inflection point information corresponding to the flexible screen sample under test based on the performance change results, includes:

[0159] S601: Extract the electrical performance change results corresponding to the electrical performance parameters, the optical performance change results corresponding to the optical performance parameters, and the deformation performance change results corresponding to the deformation parameters according to the synchronous acquisition sequence.

[0160] In this embodiment, the electrical performance change result refers to the change result information corresponding to the electrical performance parameter in the performance change result; the optical performance change result refers to the change result information corresponding to the optical performance parameter in the performance change result; the deformation performance change result refers to the change result information corresponding to the deformation parameter in the performance change result; and the synchronous acquisition sequence refers to the arrangement order formed by the electrical performance parameter, optical performance parameter, and deformation parameter according to the order of acquisition time during the synchronous acquisition process.

[0161] Specifically, when extracting the electrical performance change results corresponding to electrical performance parameters, the optical performance change results corresponding to optical performance parameters, and the deformation performance change results corresponding to deformation parameters according to the synchronous acquisition sequence, the performance change results corresponding to each acquisition time are first read, and the performance change results are arranged in order according to the order of acquisition time. Then, in the sequentially arranged performance change results, the change result content corresponding to the electrical performance parameters is extracted according to the parameter category correspondence, and the extracted change result content is arranged according to the synchronous acquisition sequence to obtain the electrical performance change results. Similarly, the change result content corresponding to the optical performance parameters is extracted according to the parameter category correspondence, and the extracted change result content is arranged according to the synchronous acquisition sequence to obtain the optical performance change results. Finally, the change result content corresponding to the deformation parameters is extracted according to the parameter category correspondence, and the extracted change result content is arranged according to the synchronous acquisition sequence to obtain the deformation performance change results.

[0162] S602: Determine the multi-parameter response order based on the sequential relationship between the electrical performance change results, optical performance change results, and deformation performance change results during continuous acquisition.

[0163] In this embodiment, the response sequence refers to the sequential relationship between the electrical performance change results, optical performance change results, and deformation performance change results during continuous acquisition. The multi-parameter response order result refers to the result information determined based on the response sequence, used to characterize the response order of the electrical performance change results, optical performance change results, and deformation performance change results during continuous acquisition.

[0164] Specifically, to determine the multi-parameter response order based on the sequential relationship of the responses of electrical performance changes, optical performance changes, and deformation performance changes during continuous acquisition, the electrical performance changes, optical performance changes, and deformation performance changes at each acquisition moment are first read according to the synchronous acquisition sequence. Then, during continuous acquisition, it is determined whether the corresponding change responses of the electrical performance changes, optical performance changes, and deformation performance changes occur at each acquisition moment, and the acquisition moment position where the change response first occurs for each electrical performance change, optical performance change, and deformation performance change result is recorded. Subsequently, the acquisition moment positions corresponding to the electrical performance change, optical performance change, and deformation performance change results are compared sequentially to determine the response order of the electrical performance change, optical performance change, and deformation performance change results during continuous acquisition. Finally, the response order is determined as the multi-parameter response order.

[0165] S603: Based on the multi-parameter response order results, determine whether a preset order offset state is formed between the electrical performance change results, optical performance change results, and deformation performance change results.

[0166] In this embodiment, the preset order offset state refers to the state information where the response order of the electrical performance change results, optical performance change results, and deformation performance change results shifts relative to the preset response order requirement during continuous acquisition.

[0167] Specifically, based on the multi-parameter response sequence results, when determining whether a preset order offset state exists among the electrical performance change results, optical performance change results, and deformation performance change results, the preset response sequence requirements are first read, and the actual response sequences corresponding to the electrical performance change results, optical performance change results, and deformation performance change results in the multi-parameter response sequence results are extracted. Then, the actual response sequences are compared with the response sequence requirements to determine whether the response sequences corresponding to the electrical performance change results, optical performance change results, and deformation performance change results during continuous acquisition are consistent with the response sequence requirements. When the actual response sequence is inconsistent with the response sequence requirements, it is determined that a preset order offset state exists among the electrical performance change results, optical performance change results, and deformation performance change results. When the actual response sequence is consistent with the response sequence requirements, it is determined that a preset order offset state does not exist among the electrical performance change results, optical performance change results, and deformation performance change results.

[0168] S604: If the judgment result indicates that a preset order offset state has been formed, the information at the corresponding collection location will be determined as the performance inflection point information.

[0169] In this embodiment, the information corresponding to the acquisition position refers to the acquisition time position corresponding to the preset order offset state when the preset order offset state is formed, and the position information of the acquisition time position in the continuous acquisition sequence.

[0170] Specifically, when the judgment result indicates the formation of a preset order offset state, and the information at the corresponding acquisition position is determined as the performance inflection point information, the result content representing the formation of the preset order offset state in the judgment result is read first, and the response order change position corresponding to the preset order offset state in the multi-parameter response order result is located. Then, based on the response order change position, the acquisition time positions of the electrical performance change result, optical performance change result, and deformation performance change result in the continuous acquisition process are extracted forward, and the arrangement position of the acquisition time position in the continuous acquisition sequence is determined as the information of the corresponding acquisition position. Subsequently, the information of the corresponding acquisition position is established with the preset order offset state, and the information of the corresponding acquisition position after the establishment of the correspondence is determined as the performance inflection point information.

[0171] In one embodiment, step S70, namely determining the test endpoint result corresponding to the flexible screen sample under test based on the performance inflection point information and the failure threshold, includes:

[0172] S701: Based on the performance inflection point information, determine the monitoring interval corresponding to the inflection point of the flexible screen sample to be tested.

[0173] In this embodiment, the monitoring interval after the inflection point refers to the collection interval information that is used to continuously extract subsequent performance change results, starting from the collection position corresponding to the performance inflection point information.

[0174] Specifically, when determining the monitoring interval after the inflection point of the flexible screen sample under test based on the performance inflection point information, the corresponding acquisition time position and the arrangement position in the continuous acquisition sequence are first read from the performance inflection point information. Then, the acquisition point corresponding to the acquisition time position is determined as the starting position of the interval, and the subsequent acquisition time positions are extracted according to the continuous acquisition sequence to form a continuous acquisition range starting from the starting position of the interval. Subsequently, the continuous acquisition range is established in correspondence with the subsequent monitoring process of the flexible screen sample under test after the performance inflection point information appears, and the continuous acquisition range after establishing the correspondence is determined as the monitoring interval after the inflection point of the flexible screen sample under test.

[0175] S702: After extracting the inflection point, monitor the corresponding performance change results within the monitoring interval.

[0176] In this embodiment, extraction refers to the process of reading and filtering the performance change results within the collection range according to the collection range corresponding to the monitoring interval after the inflection point.

[0177] Specifically, when extracting the performance change results corresponding to the monitoring interval after the inflection point, the starting position and ending range of the monitoring interval after the inflection point are read first, and the position of each collection time is located one by one according to the continuous collection order corresponding to the monitoring interval after the inflection point. Then, the results corresponding to each collection time position are screened from all the recorded performance change results, and the screened performance change results are sorted in order according to the continuous collection order corresponding to the monitoring interval after the inflection point, so as to obtain the performance change results corresponding to the monitoring interval after the inflection point.

[0178] S703: Based on the performance change results within the monitoring interval after the inflection point, determine whether the flexible screen sample under test is in a state of continuous degradation.

[0179] In this embodiment, the continuous degradation state refers to the state information in which the performance change results of the flexible screen sample under test continuously change towards the failure direction along the continuous acquisition sequence within the monitoring interval after the inflection point.

[0180] Specifically, to determine whether the flexible screen sample under test is in a state of continuous degradation based on the performance change results within the monitoring interval after the inflection point, the performance change results corresponding to each acquisition time position are read sequentially according to the continuous acquisition sequence corresponding to the monitoring interval after the inflection point. Then, the performance change results corresponding to adjacent acquisition time positions are compared to determine whether the performance change result corresponding to the later acquisition time position continues to increase relative to the performance change result corresponding to the previous acquisition time position, or whether it continues to change in the direction of failure. After completing the comparison of the performance change results corresponding to each adjacent acquisition time position, the continuity of the change direction of each performance change result within the entire monitoring interval after the inflection point is judged. When the performance change result within the monitoring interval after the inflection point continues to change in the direction of failure along the continuous acquisition sequence, it is determined that the flexible screen sample under test is in a state of continuous degradation. When the performance change result within the monitoring interval after the inflection point does not continue to change in the direction of failure, it is determined that the flexible screen sample under test is not in a state of continuous degradation.

[0181] S704: If the judgment result indicates that the flexible screen sample under test is in a state of continuous degradation, continue to judge whether the performance change result has reached the failure threshold.

[0182] In this embodiment, reaching the failure threshold refers to the state in which the performance change results reach or exceed the limit defined by the failure threshold in terms of the degree of parameter change.

[0183] Specifically, when the judgment result indicates that the flexible screen sample under test is in a state of continuous degradation, and further judgment is made on whether the performance change result has reached the failure threshold, the judgment result corresponding to the continuous degradation state of the flexible screen sample under test is responded to first. Then, the performance change result corresponding to each acquisition time position is read sequentially according to the continuous acquisition sequence corresponding to the monitoring interval after the inflection point. Next, the failure threshold corresponding to the performance change result is read. Then, the performance change result corresponding to each acquisition time position is compared with the failure threshold item by item according to the parameter category correspondence to determine whether the performance change result has reached the failure threshold in terms of the degree of parameter change. When the performance change result corresponding to any acquisition time position reaches the failure threshold, it is determined that the performance change result has reached the failure threshold. When the performance change result corresponding to each acquisition time position has not reached the failure threshold, it is determined that the performance change result has not reached the failure threshold.

[0184] S705: If the judgment result indicates that the performance change has reached the failure threshold, determine the test endpoint result corresponding to the flexible screen sample under test.

[0185] In this embodiment, the test endpoint result refers to the judgment result made on whether the flexible screen sample under test has met the test termination condition when the performance change result reaches the failure threshold.

[0186] Specifically, when the judgment result indicates that the performance change result has reached the failure threshold, in order to determine the test endpoint result corresponding to the flexible screen sample under test, the judgment result corresponding to the performance change result reaching the failure threshold is responded to first, and the acquisition time position corresponding to the failure threshold is extracted. Then, the acquisition time position is determined as the endpoint judgment position, and the judgment information of the flexible screen sample under test reaching the test end condition is generated according to the endpoint judgment position. Subsequently, the judgment information is established with the flexible screen sample under test to determine the test endpoint result corresponding to the flexible screen sample under test.

[0187] S706: If the performance change result indicates that the failure threshold has not been reached, continue to perform fatigue testing.

[0188] In this embodiment, continuing to execute the fatigue test refers to the processing method of continuing to execute the test process corresponding to the composite bending test spectrum when the current judgment result does not meet the test termination condition.

[0189] Specifically, when the judgment result indicates that the performance change result has not reached the failure threshold, when continuing to execute the fatigue test, the judgment result corresponding to the performance change result not reaching the failure threshold is responded to first, and the current judgment state of the flexible screen sample under test not reaching the test termination condition is maintained. Then, according to the test action sequence corresponding to the composite bending test spectrum, the multi-axis motion loading mechanism is controlled to apply multi-degree-of-freedom composite stress to the flexible screen sample under test, so that the flexible screen sample under test continues to be in the bending fatigue test process. During the process of the multi-axis motion loading mechanism continuing to execute subsequent test actions, the electrical performance parameters, optical performance parameters and deformation parameters corresponding to the flexible screen sample under test are continuously collected according to the preset trigger conditions. The corresponding performance change result is extracted based on the parameter content obtained by subsequent synchronous collection, so that the flexible screen sample under test enters the continuous test process corresponding to the subsequent test cycle.

[0190] S707: When the number of test cycles for the flexible screen sample under test reaches the preset number of cycles, determine the test endpoint result for the flexible screen sample under test.

[0191] In this embodiment, the preset number of cycles refers to the number of cycles that are pre-set for the flexible screen sample under test, used to limit the maximum number of times the fatigue test can be performed.

[0192] Specifically, when the number of test cycles for the flexible screen sample under test reaches the preset number of cycles, to determine the test endpoint result for the flexible screen sample under test, the current cycle state of the flexible screen sample under test during the fatigue test is continuously read first, and the current test cycle number is extracted from the current cycle state. Then, the preset number of cycles is read, and the current test cycle number is compared with the preset number of cycles. When the current test cycle number reaches the preset number of cycles, it is determined that the fatigue test process for the flexible screen sample under test has reached the maximum number of cycles condition. Subsequently, the determination information that the flexible screen sample under test has reached the test end condition is generated, and the determination information is determined as the test endpoint result for the flexible screen sample under test.

[0193] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0194] In one embodiment, a flexible screen bending fatigue testing device is provided, which corresponds one-to-one with the flexible screen bending fatigue testing method described in the above embodiment. For example... Figure 2 As shown, the flexible screen degree-of-freedom bending fatigue testing device includes an installation and calibration module, a spectrum value setting module, a stress loading module, a synchronous acquisition module, a change analysis module, an inflection point identification module, and an endpoint determination module.

[0195] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0196] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for testing the bending fatigue of a flexible screen, characterized in that, The method for testing the bending fatigue of a flexible screen includes: The flexible screen sample to be tested is installed between the first fixture and the second fixture, and the electrical monitoring component, optical monitoring component and deformation monitoring component connected to the flexible screen sample to be tested are calibrated to obtain the benchmark test information. Set the composite bending test spectrum and failure threshold corresponding to the flexible screen sample to be tested; The multi-axis motion loading mechanism is controlled to apply multi-degree-of-freedom composite stress to the flexible screen sample under test according to the composite bending test spectrum. During the application of the multi-degree-of-freedom composite stress, the electrical performance parameters, optical performance parameters and deformation parameters of the flexible screen sample under test are simultaneously collected according to the preset triggering conditions. The electrical performance parameters, optical performance parameters, and deformation parameters are compared with the benchmark test information to obtain the performance change results of the flexible screen sample under test. Based on the performance change results, identify the performance inflection point information corresponding to the flexible screen sample under test; Based on the performance inflection point information and the failure threshold, the test endpoint result corresponding to the flexible screen sample under test is determined.

2. The method for testing the bending fatigue of a flexible screen according to claim 1, characterized in that, The process involves mounting the flexible screen sample to be tested between the first and second clamps, and performing benchmark calibration on the electrical monitoring components, optical monitoring components, and deformation monitoring components connected to the flexible screen sample to obtain benchmark test information, including: The multi-axis motion loading mechanism is controlled to drive the flexible screen sample under test to sequentially reach multiple preset calibration postures; The monitoring results of the electrical monitoring component, the optical monitoring component, and the deformation monitoring component under each of the preset calibration postures are obtained respectively; Based on the monitoring results corresponding to each preset calibration posture, determine the posture reference parameters corresponding to the electrical monitoring component, the optical monitoring component, and the deformation monitoring component, respectively; The attitude reference parameters are correlated to generate the reference test information.

3. The method for testing the bending fatigue of a flexible screen according to claim 1, characterized in that, The setting of the composite bending test spectrum and failure threshold corresponding to the flexible screen sample under test includes: Multiple test action units are defined, and each test action unit corresponds to a different multi-degree-of-freedom loading action; Based on the action intensity and action type of each test action unit, determine the action priority information corresponding to each test action unit; Based on the priority information of each action, the order of each test action unit is arranged, and the motion trajectory, motion speed, dwell time and number of cycles corresponding to each test action unit are set respectively to obtain the composite bending test spectrum; Based on the action priority information, threshold change requirements are set for the electrical performance parameters, optical performance parameters and deformation parameters, respectively. The failure threshold is determined based on the threshold change requirements described above.

4. The method for testing the bending fatigue of a flexible screen according to claim 1, characterized in that, During the application of the multi-degree-of-freedom composite stress, the electrical performance parameters, optical performance parameters, and deformation parameters of the flexible screen sample under test are simultaneously acquired according to preset triggering conditions, including: Obtain the current position and current cycle state of the multi-axis motion loading mechanism during the execution of the composite bending test spectrum; Based on the current position status, determine whether the multi-axis motion loading mechanism has reached the target acquisition position of the corresponding test action unit; If the judgment result indicates that the multi-axis motion loading mechanism has reached the target acquisition position, it is further determined whether the holding time of the multi-axis motion loading mechanism at the target acquisition position has reached the preset stable acquisition time. If the judgment result indicates that the holding time has reached the preset stable acquisition time, the synchronous acquisition of the electrical performance parameters, optical performance parameters and deformation parameters corresponding to the flexible screen sample under test is triggered. Based on the current loop state, determine whether the current loop count has reached the preset loop acquisition condition; If the judgment result indicates that the current cycle count has reached the preset cycle acquisition condition, the synchronous acquisition of the electrical performance parameters, optical performance parameters and deformation parameters corresponding to the flexible screen sample under test is triggered.

5. The method for testing the bending fatigue of a flexible screen according to claim 1, characterized in that, The step of comparing the electrical performance parameters, optical performance parameters, and deformation parameters with the benchmark test information to obtain the performance change results corresponding to the flexible screen sample under test includes: Extract electrical reference information corresponding to the electrical performance parameters, optical reference information corresponding to the optical performance parameters, and deformation reference information corresponding to the deformation parameters from the benchmark test information; The electrical performance parameters are compared with the electrical reference information to obtain electrical difference results; the optical performance parameters are compared with the optical reference information to obtain optical difference results; and the deformation parameters are compared with the deformation reference information to obtain deformation difference results. Based on the synchronous acquisition relationship corresponding to the electrical performance parameters, optical performance parameters, and deformation parameters, the electrical difference results, optical difference results, and deformation difference results are jointly mapped to obtain parameter change correlation results; Based on the correlation results of the parameter changes, the performance change results corresponding to the flexible screen sample under test are determined.

6. The method for testing the bending fatigue of a flexible screen according to claim 1, characterized in that, The step of identifying the performance inflection point information corresponding to the flexible screen sample under test based on the performance change results includes: Extract the electrical performance change results corresponding to the electrical performance parameters, the optical performance change results corresponding to the optical performance parameters, and the deformation performance change results corresponding to the deformation parameters according to the synchronous acquisition sequence. Based on the sequential relationship between the electrical performance change results, the optical performance change results, and the deformation performance change results during the continuous acquisition process, the multi-parameter response order results are determined. Based on the multi-parameter response order results, determine whether a preset order offset state is formed between the electrical performance change results, the optical performance change results, and the deformation performance change results; If the judgment result indicates that the preset order offset state has been formed, the information at the corresponding collection location will be determined as the performance inflection point information.

7. The method for testing the bending fatigue of a flexible screen according to claim 1, characterized in that, The step of determining the test endpoint result corresponding to the flexible screen sample under test based on the performance inflection point information and the failure threshold includes: Based on the performance inflection point information, determine the monitoring interval after the inflection point of the flexible screen sample to be tested; Extract the performance change results corresponding to the monitoring interval after the inflection point; Based on the performance change results within the monitoring interval after the inflection point, it is determined whether the flexible screen sample under test is in a state of continuous degradation. If the judgment result indicates that the flexible screen sample under test is in the continuous degradation state, continue to judge whether the performance change result has reached the failure threshold; If the judgment result indicates that the performance change has reached the failure threshold, the test endpoint result corresponding to the flexible screen sample under test is determined; If the assessment result indicates that the performance change has not reached the failure threshold, the fatigue test continues. When the number of test cycles corresponding to the flexible screen sample under test reaches the preset number of cycles, the test endpoint result corresponding to the flexible screen sample under test is determined.

8. A flexible screen bending fatigue testing device, characterized in that, The flexible screen bending fatigue testing device includes: The installation calibration module is used to install the flexible screen sample to be tested between the first fixture and the second fixture, and to perform benchmark calibration on the electrical monitoring component, optical monitoring component and deformation monitoring component connected to the flexible screen sample to be tested, so as to obtain benchmark test information. The spectrum setting module is used to set the composite bending test spectrum and failure threshold corresponding to the flexible screen sample under test; The stress loading module is used to control the multi-axis motion loading mechanism to apply multi-degree-of-freedom composite stress to the flexible screen sample under test according to the composite bending test spectrum. The synchronous acquisition module is used to synchronously acquire the electrical performance parameters, optical performance parameters and deformation parameters of the flexible screen sample under test according to preset triggering conditions during the application of the multi-degree-of-freedom composite stress. The change analysis module is used to compare the electrical performance parameters, optical performance parameters and deformation parameters with the benchmark test information to obtain the performance change results of the flexible screen sample under test. The inflection point identification module is used to identify the performance inflection point information corresponding to the flexible screen sample under test based on the performance change results. The endpoint determination module is used to determine the test endpoint result corresponding to the flexible screen sample under test based on the performance inflection point information and the failure threshold.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the flexible screen degree-of-freedom bending fatigue test method as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the flexible screen degree-of-freedom bending fatigue test method as described in any one of claims 1 to 7.

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