Automatic flattening control algorithm and sample reliability test method and apparatus using the same

Abstract

The present application provides an automatic flattening control algorithm, a sample reliability test method and device using the same. The automatic flattening control algorithm is an automatic flattening control algorithm for determining a minimum driving value of tension applied to a sample, both sides of the sample being coupled to a moving unit and a winding unit. The automatic flattening control algorithm includes a sample rotation step of rotating the winding unit at a preset reference angle, a set value check step of monitoring a rotation load applied to the sample by rotation of the winding unit, and a set comparison step of comparing a change amount between an Nth (a natural number greater than 0) rotation load and an N-1th rotation load of the rotation load monitored by the set value check step.

Description

[0001] This application claims priority to Korean Patent Application No. 10-2022-0052309, filed on April 27, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to an automatic flattening control algorithm that maintains the tension of a sample, such as a flexible material, by maintaining the tension applied to the sample within a predetermined range during a rolling test of the sample, and to a sample reliability testing method and apparatus using the automatic flattening control algorithm. Background Technology

[0003] Generally speaking, liquid crystal displays (LCDs), organic light-emitting diodes (OLEDs), and electroluminescent displays (ELs) are types of flat panel displays (FPDs). They are characterized by low power consumption, thinness, and flatness, and therefore they are used in various fields, including not only computer and mobile phone displays, but also vehicle and aircraft displays.

[0004] Recently, flexible displays have been actively developed in this field. With improvements in performance and quality, such flexible displays are required not only to be easily bent, but also to possess durability and actuation stability to resist bending beyond predetermined levels. More precisely, such flexible displays must be able to display images normally when bent or rolled up, and even when unfolded. The degree of flexibility within the range where a flexible display can normally display images, i.e., flexibility, is one of the important performance characteristics of flexible displays.

[0005] Recently, with the development of the performance and quality of flexible displays, the following research on displays is actively underway, such as foldable display technology that can be fully folded or unfolded during use, sliding display technology that can slide during use, and rollable display technology that can be rolled up like paper during use. Furthermore, commercialization based on the research results is also actively underway.

[0006] Especially during the development of rollable display technology, when conducting durability tests on rollable displays, the tension applied to the sample is one of the important factors affecting the test. In order to obtain a fair and consistent test evaluation result, the tension applied to the sample should be set consistently.

[0007] However, since users set different tensions for the same sample, there is a problem that the shape of the sample wound on the winding unit is different when the sample is rolled, which leads to a considerable difference in the durability assessment of the sample.

[0008] (Patent Documents)

[0009] (Patent Document 1) Korean Patent No. 10-2348742 (Published on January 7, 2022, Title: Rolling Apparatus and Evaluation System for Durability Evaluation of Flexible Materials) Summary of the Invention

[0010] The present invention aims to solve the above-mentioned problems, and one object of the present invention is to provide an automatic flattening control algorithm that maintains the tension of a sample, such as a flexible material, by maintaining the tension applied to the sample within a predetermined range during the rolling test of the sample, and to provide a sample reliability test method and apparatus using the automatic flattening control algorithm.

[0011] Another object of the present invention is to provide an automatic flattening control algorithm for achieving stable rolling tests by optimally controlling tension, and a sample reliability test method and apparatus using the automatic flattening control algorithm.

[0012] The automatic flattening control algorithm according to an embodiment of the present invention is an automatic flattening control algorithm for determining the minimum driving value of the tension applied to a sample, wherein the two sides of the sample are respectively coupled to a moving unit and a winding unit. The automatic flattening control algorithm includes: a sample rotation step, in which the winding unit rotates at a preset reference angle or a preset check angle; a set value check step, in which the rotational load applied to the sample by the rotation of the winding unit is monitored; and a set comparison step, in which the Nth (a natural number greater than 0) rotational load monitored by the set value check step is compared with the (N-1)th rotational load, and further includes at least one of the following: a check rotation step, in which, as a comparison result of the set comparison step, when the Nth rotational load is 0 or the Nth change (the value obtained by subtracting the (N-1)th rotational load from the Nth rotational load) is 0, the sample rotation step can be executed, or the winding unit is rotated at the preset check angle, and then the sample rotation step can be executed; and a minimum value calculation step, in which, as a result of the set comparison step, when the Nth rotational load is greater than 0 or the Nth change is greater than 0, the tension applied to the sample is calculated based on the Nth rotational load.

[0013] The rotation check step, as a comparison result of the setting comparison step, allows the sample rotation step to be executed when the Nth rotational load is 0 or the Nth change (the value obtained by subtracting the N-1th rotational load from the Nth rotational load) is 0. When the Nth rotational load is greater than 0 or the Nth change is greater than 0, the winding unit can be rotated at a preset check angle, and then the setting value check step can be executed. The minimum value calculation step, as a result of the setting comparison step, calculates the tension applied to the sample based on the N-1th rotational load when the (N-1th)th rotational load is greater than 0 and the Nth rotational load is greater than 0.

[0014] The sample reliability testing method according to an embodiment of the present invention is a method for testing sample reliability using a minimum drive value, wherein the sample is coupled to a moving unit and a winding unit on both sides, respectively. The reliability testing method includes: an initial value check step, extracting a corresponding minimum drive value based on the type of sample coupled to the moving unit and the winding unit; a start rotation step, applying tension to the sample corresponding to the minimum drive value extracted by the initial value check step, and rotating the winding unit at a preset start angle or a preset additional angle; a start value check step, monitoring the rotational load applied to the sample by the rotation of the winding unit; and a start comparison step, comparing the rotational load measured by the start value check step with a preset limit load, and further including at least one of the following: an additional rotation step, where, as a comparison result of the start comparison step, if the current rotational load is a preset limit load or less, the start rotation step can be executed, or the winding unit is rotated at a preset additional angle, and then the start rotation step can be executed; and a drive control step, where, as a comparison result of the start comparison step, if the current rotational load exceeds the preset limit load, the operation of the moving unit is controlled.

[0015] The start-up rotation step can be performed after the drive control step.

[0016] The minimum driving value can be determined as the tension calculated by the minimum value calculation step in the automatic flattening control algorithm according to an embodiment of the present invention.

[0017] The sample reliability testing apparatus according to an embodiment of the present invention includes: a base unit; a winding unit capable of winding a sample thereon and rotatably coupled to the base unit; a moving unit, one end of the sample wound on the winding unit being detachably coupled to the moving unit, and the moving unit being slidably coupled to the base unit at a predetermined distance from the winding unit; and a control unit configured to control the operation of the winding unit and the moving unit, wherein the control unit includes at least one of: a setting controller configured to determine a minimum driving value of the tension applied to the sample; and an operation controller configured to control the rotation of the winding unit and the sliding of the moving unit as a whole based on the minimum driving value of the tension applied to the sample.

[0018] The controller can be set up using an automatic flattening control algorithm according to an embodiment of the present invention, and the controller can be operated using a sample reliability test method according to an embodiment of the present invention.

[0019] According to the present invention, a sample, such as a flexible material, maintains tension by maintaining the tension applied to the sample within a predetermined range during a rolling test of the sample.

[0020] Furthermore, it can maintain the uniformity of the tension applied to the sample, and stable rolling tests can be achieved by optimally controlling the tension.

[0021] In addition, the accuracy of determining the minimum drive value can be improved by considering the relationship between the preset reference angle and the preset inspection angle.

[0022] Furthermore, since a setpoint check step is performed after the rotation check step, the continuity of the automatic flattening control algorithm for setting the minimum drive value can be achieved.

[0023] In addition, due to the execution of the minimum value setting step, the minimum drive value can be retained according to the type of sample. Any user can easily set the tension of the sample before conducting a rolling test on the sample, and a consistent setting value can be provided for the sample.

[0024] Furthermore, by using sample reliability testing methods, the reliability of sample rolling tests can be improved, and samples can be prevented from deforming or breaking during rolling tests.

[0025] In addition, the accuracy of the rolling test of the sample can be improved by considering the relationship between the preset starting angle and the preset additional angle.

[0026] Furthermore, due to the initialization steps, a minimum driving tension can be applied to the sample placed in the test apparatus, and a rolling test can be performed quickly.

[0027] Furthermore, since the starting value check step is performed after the additional rotation step, the continuity of the rolling test can be achieved.

[0028] Furthermore, since the starting rotation step or additional rotation step is performed after the drive control step, tension can be applied to the relaxed sample F, and the continuity of the rolling test can be achieved. Attached Figure Description

[0029] The above and other objectives, features and advantages of the present invention will be more clearly understood from the following detailed description, taken in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic view illustrating a sample reliability testing apparatus according to an embodiment of the present invention;

[0031] Figure 2 This is a flowchart illustrating an automatic flattening control algorithm according to an embodiment of the present invention; and

[0032] Figure 3 This is a flowchart schematically illustrating a sample reliability test method according to an embodiment of the present invention. Detailed Implementation

[0033] The above-described objects, other objects, features, and advantages of the present invention will become readily apparent from the following illustrative embodiments related to the accompanying drawings. However, the invention is not limited to the embodiments disclosed herein and may be practiced in other ways. Rather, the embodiments disclosed herein are provided so that the disclosure will be thorough and complete, and will fully convey the spirit of the invention to those skilled in the art.

[0034] In this specification, when one component is on another component, the component may be directly formed on the other component, or a third component may be disposed therebetween. In the accompanying drawings, the thickness of the components may be exaggerated for effective description.

[0035] When the terms "first," "second," etc., are used to describe components in the specification, the components should not be limited by the terms. These terms are only used to distinguish certain components from other components. The embodiments described herein include supplementary embodiments.

[0036] When a first element (or component) operates or performs on a second element (or component), it should be understood that the first element (or component) is operated or performed in the environment in which the second element (or component) is operated or performed, or operates or performs the second element (or component) directly or indirectly through interaction.

[0037] When a component, assembly, device, or system includes a component configured by a program or software, unless otherwise specified, it should be understood that the component, assembly, device, or system includes hardware (e.g., memory or CPU), or another program, or software required to execute or operate the program or software (e.g., an operating system for driving the hardware).

[0038] When implementing a component (or assembly), unless otherwise specified, it should be understood that the component (or assembly) can be implemented in any type, including software, hardware, or both software and hardware.

[0039] The terminology used herein is provided to describe embodiments without limiting the invention. In the specification, the singular form includes the plural form unless specifically stated in the sentence. The terms “comprising” and / or “including” as used herein do not exclude the presence or addition of any other component besides the described component.

[0040] Reference Figure 1 The sample reliability test method according to an embodiment of the present invention may include: a base unit 10; a winding unit 30 capable of winding a sample F and rotatably coupled to the base unit 10; a moving unit 20, one end of the sample F wound on the winding unit 30 being detachably coupled to the moving unit 20, and the moving unit 20 being slidably coupled to the base unit 10 at a predetermined distance from the winding unit 30; and a control unit 40 controlling the operation of the winding unit 30 and the moving unit 20.

[0041] The sample F according to an embodiment of the present invention may include a display panel made of a flexible material.

[0042] The base unit 10 forms the bottom of the test apparatus. The winding unit 30 is rotatably coupled to the base unit 10, and the moving unit 20 is slidably coupled to the base unit 10 at a predetermined distance from the winding unit 30.

[0043] The winding unit 30 may include: a winding member 31 that can wind up a sample F that is detachably coupled thereto; and a winding drive member 32 that causes the winding member 31 to rotate.

[0044] The winding member 31 is rotatably coupled to the base unit 10. The winding drive member 32 enables the winding member 31 to rotate in a motor-driven manner.

[0045] The moving unit 20 may include: a moving member 21, one end of which is detachably coupled; and a moving drive member 22, which causes the moving member 21 to slide. The moving member 21 is slidably coupled to the base unit 10. The moving drive member 22 causes the moving member 21 to slide in a motor-driven manner.

[0046] The moving unit 20 may further include a force measuring unit 23, which measures the load applied to the moving member 21 in response to the tension applied to the sample F. The force measuring unit 23 may measure the rotational load applied to the sample F in response to the sliding of the moving member 21.

[0047] The control unit 40 may include at least one of the following: a setting controller that determines the minimum driving value of the tension applied to the sample F; and an operation controller that controls the rotation of the winding unit 30 and the sliding of the moving unit 20 as a whole based on the minimum driving value of the tension applied to the sample F.

[0048] The setting controller may include: a setting winder that controls the operation of the winding drive member 32 such that the winding member 31 rotates at a preset reference angle or a preset inspection angle while coupled to the sample F; a setting inspector that monitors the rotational load applied to the sample F by the rotation of the winding member 31; and a setting comparator that compares the Nth (a natural number greater than 0) rotational load monitored by the setting inspector with the (N-1)th rotational load. Depending on the comparison result of the setting comparator, the setting controller may further include at least one of an inspection rotator and a setting calculator.

[0049] As a result of the comparison by the comparator, the rotator is checked when the Nth rotational load is 0 or the Nth change (the value obtained by subtracting the (N-1)th rotational load from the Nth rotational load) is 0. For example, the rotator can operate the set winder. As another example, the rotator can rotate the winding member 31 of the winding unit 30 at a preset check angle and then operate the set checker. In this case, it is advantageous that the preset check angle is the same as the preset reference angle.

[0050] As a result of the comparison by the setting comparator, the setting calculator operates when the Nth rotational load is greater than 0 or the Nth change is greater than 0. The setting calculator calculates the tension applied to the sample F based on the Nth rotational load.

[0051] Therefore, for the operation of the setting controller, assuming the preset reference angle is 0.1 degrees, the preset inspection angle is 0.1 degrees. When the rotational load monitored by the setting inspector for the second time is 0, and the rotational load monitored by the setting inspector for the third time is 8, the setting comparator operates the setting calculator. In this case, the setting calculator calculates the tension applied to the sample based on the rotational load monitored by the setting inspector for the third time being 8.

[0052] In the setting of the inspection device, the measured value by the force measuring unit 23 can be applied as a rotational load, which is applied to the sample F by the rotation of the winding member 31.

[0053] The setting controller may further include a setting setter, which determines the tension calculated by the setting calculator as the minimum drive value applied to the winding member 31.

[0054] As a variation, the setting controller may further include at least one of a check rotator and a setting calculator. As a comparison result of the setting comparator, when the Nth rotational load is 0 or the Nth change (the value obtained by subtracting the (N-1)th rotational load from the Nth rotational load) is 0, the check rotator operates the setting winder. When the Nth rotational load is greater than 0 or the Nth change is greater than 0, the check rotator rotates the winding member 31 of the winding unit 30 by a preset check angle, and then operates the setting checker. In this case, it is advantageous that the preset check angle is a preset reference angle or smaller.

[0055] As a comparison result of the setting comparator, when the (N-1)th rotational load is greater than 0 and the Nth rotational load is greater than 0, the setting calculator calculates the tension applied to the sample F based on the (N-1)th rotational load.

[0056] For the operation of the controller set according to the modified example, it is assumed that the preset reference angle is 0.1 degrees and the preset inspection angle is 0.01 degrees. In addition, it is assumed that the rotational load of sample F increases linearly for every 0.1 degrees.

[0057] When the rotational load monitored by the inspector for the second time is set to 0, and the rotational load monitored by the inspector for the third time is set to 8, the comparator is set to operate the inspection rotator. The inspection rotator further rotates the winding member 31 by 0.01 degrees, which is the preset inspection angle.

[0058] Therefore, as the winding member 31 rotates further by 0.01 degrees, the sample F is further tensioned, and the rotational load monitored by the setting checker for the fourth time increases by 1 compared to the rotational load monitored by the setting checker for the third time, thus the rotational load monitored by the setting checker for the fourth time becomes 9. Therefore, the setting comparator operates the setting calculator.

[0059] For example, the setting calculator can calculate the tension based on the rotational load of 9 monitored for the third time by the setting checker.

[0060] As another example, since the rotational load of the sample increases linearly with each 0.1 degree, it can be seen that the rotational load increases in increments of 10 for every 0.1 degree rotation of the winding member 31. Therefore, the setting calculator can calculate the tension based on the rotational load of 8 monitored on the third time, or based on the rotational load of 9 monitored on the fourth time by the setting inspector, or based on the maximum rotational load of 10 per 0.1 degree, or based on half of the maximum rotational load of 5 per 0.1 degree.

[0061] Although the actions of setting the controller are described in chronological order, the actions are not limited to this and may show continuity.

[0062] The preset reference angle and preset inspection angle can be set differently depending on the test method.

[0063] The operation controller may include: a drive setter that extracts a corresponding minimum drive value based on the type of sample F coupled to the moving unit 20 and the winding unit 30; a start winder that applies tension to the sample F corresponding to the minimum drive value extracted by the drive setter and rotates the winding unit 30 at a preset start angle or a preset additional angle; a start checker that monitors the rotational load applied to the sample F by the rotation of the winding member 31 of the winding unit 30; and a start comparator that compares the rotational load monitored by the start checker with a preset limit load. Depending on the comparison result of the start comparator, the operation controller may further include at least one of an additional rotator and a drive controller.

[0064] As a result of the comparison by the start comparator, if the current rotating load is at or below the preset limit load, the auxiliary rotator operates. For example, the auxiliary rotator can operate to start the winder. As another example, the auxiliary rotator can cause the winding unit 30 to rotate at a preset auxiliary angle, and then operate the start checker.

[0065] Based on the comparison result of the start comparator, the drive controller operates when the current rotational load exceeds the preset limit load. The drive controller controls the operation of the moving unit 20 so that the tension applied to the sample F approaches the minimum drive value. The drive controller controls the operation of the moving unit 20, and then operates to start the winder.

[0066] Although the control operations of the controller are described in chronological order, the control operations are not limited to this and may show continuity.

[0067] The preset start angle and preset additional angle can be set differently depending on the test method.

[0068] The operation controller may further include an initial setter, which sets a minimum drive value extracted by the drive setter to correspond to the new sample F when the new sample F is coupled to the moving unit 20 and the winding unit 30 in the sample reliability test apparatus, so as to test the sample F.

[0069] Reference Figure 2 According to an embodiment of the present invention, the automatic flattening control algorithm is used to determine the minimum driving value of the tension applied to the sample F, with both sides of the sample F coupled to the moving unit 20 and the winding unit 30, respectively. The automatic flattening control algorithm according to an embodiment of the present invention can be implemented through the operation of the setting controller of the control unit 40.

[0070] The automatic flattening control algorithm according to embodiments of the present invention may include: a sample rotation step (S12), a set value check step (S13), and a set comparison step (S14), and may further include at least one of a check rotation step (S17) and a minimum value calculation step (S15), and may further include a minimum value setting step (S16).

[0071] Before the sample rotation step (S12), the user can perform the sample fixing step (S11), in which the two sides of the sample F are manually or automatically coupled to the moving member 21 of the moving unit 20 and the winding member 31 of the winding unit 30, respectively.

[0072] The sample rotation step (S12) rotates the winding member 31 of the winding unit 30 at a preset reference angle. The sample rotation step (S12) can be implemented by the operation of the winding drive member 32 of the winding unit 30 according to the operation of the set winder.

[0073] The setpoint check step (S13) monitors the rotational load applied to the sample F by the rotation of the winding unit 30. The setpoint check step (S13) can be implemented by monitoring the measured values ​​measured by the force measuring unit 23, depending on the operation of the setpoint checker.

[0074] The comparison step (S14) compares the Nth (a natural number greater than 0) rotating load detected by the setting value check step (S13) with the (N-1)th rotating load. The comparison step (S14) can be implemented by setting the operation of the comparator.

[0075] As a result of the comparison in the setting comparison step (S14), if the Nth rotational load is 0 or the Nth change (the value obtained by subtracting the (N-1)th rotational load from the Nth rotational load) is 0, then the inspection rotation step (S17) is executed. For example, the inspection rotation step (S17) can execute the sample rotation step (S12). As another example, the inspection rotation step (S17) can rotate the winding member 31 of the winding unit 30 by a preset inspection angle, and then execute the sample rotation step (S12). The inspection rotation step (S17) can be implemented by the operation of the winding drive member 32 of the winding unit 30 according to the operation of the inspection rotator. By using the inspection rotation step (S17), the continuity of the automatic flattening control algorithm can be ensured, and continuous operation of the winding drive member 32 can be achieved.

[0076] As a result of the comparison step (S14), if the Nth rotational load is greater than 0 or the Nth change is greater than 0, then the minimum value calculation step (S15) is executed. The minimum value calculation step (S15) calculates the tension applied to the sample F based on the Nth rotational load. The minimum value calculation step (S15) can be implemented by setting the calculator. After the minimum value calculation step (S15), the minimum value setting step (S16) is executed.

[0077] The minimum value setting step (S16) determines the tension calculated in the minimum value calculation step (S15) as the minimum drive value applied to the winding member 31. The minimum value setting step (S16) can be implemented by operating the setting device. Through the minimum value setting step (S16), the automatic flattening control algorithm is completed.

[0078] As a variation, the check rotation step (S17) and the minimum value calculation step (S15) can be implemented by the operation of the check rotator and the setting calculator included in the setting controller according to the variation.

[0079] More specifically, for example, as a comparison result of the setting comparison step (S14), when the Nth rotational load is 0 or the Nth change (the value obtained by subtracting the (N-1)th rotational load from the Nth rotational load) is 0, the check rotation step (S17) enables the sample rotation step (S12) to be performed. As another example, when the Nth rotational load is greater than 0 or the Nth change is greater than 0, the check rotation step (S17) causes the winding member 31 of the winding unit 30 to rotate at a preset check angle, and then enables the setting value check step (S13) to be performed.

[0080] As a comparison result of the setting comparison step (S14), when the (N-1)th rotational load is greater than 0 and the Nth rotational load is greater than 0, the minimum value setting step (S16) calculates the tension applied to the sample F based on the (N-1)th rotational load.

[0081] Reference Figure 3 The sample reliability test method according to an embodiment of the present invention is a method for testing the reliability of sample F using a minimum drive value. The minimum drive value can be determined according to the type of sample F as the tension calculated in the minimum value calculation step (S15) or the minimum value setting step (S16) in the automatic flattening control algorithm according to an embodiment of the present invention. The sample reliability test method according to an embodiment of the present invention can be implemented by the operation controller of the control unit 40.

[0082] The sample reliability test method according to embodiments of the present invention may include: an initial value check step (S21), a start rotation step (S22), a start value check step (S23), and a start comparison step (S24), and may further include at least one of an additional rotation step (S27) and a drive control step (S25).

[0083] The initial value check step (S21) extracts the corresponding minimum drive value based on the type of sample F coupled to the moving unit 20 and the winding unit 30. The initial value check step (S21) can be implemented through the operation of the drive setter.

[0084] The initial value check step (S21) may further include an initial setting step. When the new sample F is coupled to the moving unit 20 and the winding unit 30 in the sample reliability test device, the initial setting step sets the minimum driving value extracted in the initial value check step (S21) to correspond to the new sample F, so as to test the sample F. The initial setting step can be implemented by the operation of the initial setting device.

[0085] The start-rotation step (S22) corresponds to the minimum drive value extracted through the initial value check step (S21), applying tension to the sample and causing the winding unit 30 to rotate at a preset start angle or a preset additional angle. The start-rotation step (S22) can be implemented by the operation of the winding drive member 32 of the winding unit 30 according to the operation of starting the winder.

[0086] The start-up value check step (S23) monitors the rotational load applied to the sample F by the rotation of the winding member 31 of the winding unit 30. The start-up value check step (S23) can be implemented by monitoring the measured value measured by the force measuring unit 23, depending on the operation of the start-up checker.

[0087] The start comparison step (S24) compares the rotating load measured in the start value check step (S23) with the preset limit load. The start comparison step (S24) can be implemented by operating the drive setter.

[0088] As a result of the comparison in the initial comparison step (S24), if the current rotational load is at or below the preset limit load, an additional rotation step (S27) is executed. The additional rotation step (S27) can be implemented by the operation of the winding drive member 32 of the winding unit 30, depending on the operation of the additional rotator. For example, the additional rotation step (S27) enables the initial rotation step (S22) to be executed. As another example, the additional rotation step (S27) causes the winding member 31 of the winding unit 30 to rotate at a preset additional angle, thus enabling the initial rotation step (S22) to be executed. This ensures the continuity of the reliability test method for sample F and enables continuous operation of the winding drive member 32.

[0089] As a result of the comparison in the initial comparison step (S24), if the current rotational load exceeds the preset limit load, the drive control step (S25) is executed. The drive control step (S25) can be implemented by the operation of the moving unit 20 and the moving drive member 22, based on the operation of the drive controller. The drive control step (S25) controls the operation of the moving unit 20 so that the tension applied to the sample F approaches the minimum drive value. After the drive control step (S25), the initial rotation step (S22) is executed, thus ensuring the continuity of the reliability test method for the sample F and enabling continuous operation of the winding drive member 32, and allowing the sample F to be continuously wound onto the winding member 31.

[0090] According to the present invention, a sample F, such as a flexible material, maintains tension by maintaining the tension applied to the sample within a predetermined range during a rolling test of the sample F.

[0091] Furthermore, it can maintain the uniformity of the tension applied to the sample F, and a stable rolling test can be achieved by optimally controlling the tension.

[0092] In addition, the accuracy of determining the minimum drive value can be improved by considering the relationship between the preset reference angle and the preset inspection angle.

[0093] Furthermore, since the setpoint check step (S13) is performed after the rotation check step (S17), the continuity of the automatic flattening control algorithm for setting the minimum drive value can be achieved.

[0094] In addition, since the minimum value setting step (S16) is performed, the minimum drive value can be retained according to the type of sample F. Any user can easily set the tension of sample F before rolling test, and a consistent setting value can be provided for sample F.

[0095] Furthermore, by using the reliability test method for sample F, the reliability of the rolling test of sample F can be improved, and the deformation or breakage of sample F during the rolling test can be prevented.

[0096] In addition, the accuracy of the rolling test of sample F can be improved by considering the relationship between the preset starting angle and the preset additional angle.

[0097] Furthermore, due to the initialization steps, a tension as the minimum driving value can be applied to the sample F set in the test apparatus, and a rolling test can be performed quickly.

[0098] Furthermore, since the starting value check step (S23) is performed after the additional rotation step (S27), the continuity of the rolling test can be achieved.

[0099] Furthermore, since the starting rotation step (S22) or the additional rotation step (S27) is performed after the drive control step (S25), tension can be applied to the relaxed sample F, and the continuity of the rolling test can be achieved.

Claims

1. An automatic flattening control algorithm, which is an automatic flattening control algorithm for determining the minimum driving value of the tension applied to a sample, wherein the two sides of the sample are respectively coupled to a moving unit and a winding unit, characterized in that, Include: The sample rotation step causes the winding unit to rotate at a preset reference angle or a preset inspection angle. The set value check step monitors the rotational load applied to the sample by the rotation of the winding unit; as well as A comparison step is defined, which compares the Nth rotating load and the (N-1)th rotating load detected by the set value check step, where N is a natural number greater than 0. Further includes: The rotation step is checked as a comparison result of the set comparison step. When the Nth rotation load is 0 or the Nth change is 0, the sample rotation step can be executed. When the Nth rotation load is greater than 0 or the Nth change is greater than 0, the winding unit is rotated at the preset check angle, and then the set value check step can be executed. The Nth change is the value obtained by subtracting the (N-1)th rotation load from the Nth rotation load. as well as In the minimum value calculation step, as a result of the setting comparison step, when the (N-1)th rotational load is greater than 0 and the Nth rotational load is greater than 0, the tension applied to the sample is calculated based on the (N-1)th rotational load. as well as The minimum value setting step determines the tension calculated through the minimum value calculation step as the minimum drive value applied to the winding unit, wherein the preset check angle is less than or equal to the preset reference angle.

2. A sample reliability testing method, which uses a minimum drive value to test sample reliability, wherein the sample is coupled to a moving unit and a winding unit on both sides, respectively, characterized in that... Include: The initial value check step extracts the corresponding minimum drive value based on the type of sample coupled to the moving unit and the winding unit. The rotation initiation step corresponds to the minimum drive value extracted through the initial value check step, applying tension to the sample and causing the winding unit to rotate at a preset initiation angle or a preset additional angle; The start-up value check step monitors the rotational load applied to the sample by the rotation of the winding unit; and The initiation comparison step compares the rotational load measured in the initiation value check step with a preset limit load, and Further includes at least one of the following: An additional rotation step, as a comparison result of the start-up comparison step, if the current rotation load is the preset limit load or smaller, then the start-up rotation step can be executed, or the winding unit can be rotated at a preset additional angle, and then the start-up rotation step can be executed. as well as In the drive control step, as a comparison result of the start comparison step, when the current rotational load exceeds the preset limit load, the operation of the moving unit is controlled, wherein the minimum drive value is determined as the tension calculated by the minimum value calculation step in the automatic flattening control algorithm of claim 1.

3. The sample reliability test method according to claim 2, characterized in that, The start-up rotation step is performed after the drive control step.

4. A sample reliability testing device, characterized in that, Include: Base unit; A winding unit is capable of winding the sample thereon and is rotatably coupled to the base unit; A movable unit, wherein one end of the sample wound on the winding unit is detachably coupled to the movable unit, and the movable unit is slidably coupled to the base unit at a predetermined distance from the winding unit; as well as The control unit is configured to control the operation of the winding unit and the moving unit. The control unit includes: The controller is configured to determine the minimum driving value of the tension applied to the sample using the automatic flattening control algorithm of claim 1; and An operating controller is configured to control the rotation of the winding unit and the sliding of the moving unit as a whole based on the minimum drive value of the tension applied to the sample.

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