CN113740176A

CN113740176A - Static bending test device and system

Info

Publication number: CN113740176A
Application number: CN202010459038.0A
Authority: CN
Inventors: 唐涛; 胡治晋; 贺佐正; 申孟虎
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-12-03
Anticipated expiration: 2040-05-27
Also published as: CN113740176B

Abstract

The application provides a static testing arrangement and system of buckling, the device includes: the first fixing piece and the second fixing piece are used for fixedly connecting two ends of the flexible piece to be detected; the bending jig is positioned between the first fixing piece and the second fixing piece and comprises a circular arc-shaped first abutting surface, the first abutting surface is used for abutting against the flexible piece to be detected, and the curvature radius of the first abutting surface is R1; the first driving piece is used for driving the first fixing piece to a first preset position so that the flexible piece to be tested is bent around the first abutting surface, and the bending angle is alpha; the first driving piece is further used for keeping the first fixing piece at the first preset position so as to perform a static bending test on the flexible piece to be tested, wherein the bending radius of the flexible piece to be tested is R1, and the bending angle of the flexible piece to be tested is alpha. The application provides a static testing arrangement and system of buckling can be used for testing the ability of buckling of flexible screen under the fixed crooked state.

Description

Static bending test device and system

Technical Field

The application relates to the technical field of screen manufacturing and inspection equipment, in particular to a static bending test device and system.

Background

Along with the volume production of domestic flexible display screens, the application of flexible screens can show explosive growth in the coming years, and the 3D form of flexible screens can also show subversive change in the near future, and simultaneously the curved screen can gradually become the core competition technical point of each mobile phone manufacturer. The appearance design of the current curved screen tends to be frameless, which causes great challenge to the core technical point of the flexible screen, namely the bending resistance, and the quality of the bending resistance of the flexible screen product directly influences the success or failure of the project. Therefore, how to represent the bending resistance of the flexible screen with high efficiency and high quality becomes a core technology and core competitiveness in the display field.

According to the existing testing equipment for the flexible screen, the flexible display module is placed on the bearing platform, repeated page turning type bidirectional bending is performed for testing, and the bending radius is controlled through the thickness of the gasket. However, the bending test performed by the above test equipment is a dynamic bending test, and the bending capability of the flexible screen in a fixed bending state cannot be tested.

Disclosure of Invention

The application provides a static testing arrangement and system of buckling can be used for testing the ability of buckling of flexible screen under the fixed crooked state.

In a first aspect, a static bending test device is provided, which includes: the first fixing piece is used for fixedly connecting one end of the flexible piece to be detected; the second fixing piece is used for fixedly connecting the other end of the flexible piece to be detected; the bending jig is positioned between the first fixing piece and the second fixing piece and comprises a circular arc-shaped first abutting surface, the first abutting surface is used for abutting against the flexible piece to be detected, and the curvature radius of the first abutting surface is R1; the first driving piece is used for driving the first fixing piece to a first preset position so that the flexible piece to be tested is bent around the first abutting surface, and the bending angle is alpha; the first driving piece is further used for keeping the first fixing piece at the first preset position so as to perform a static bending test on the flexible piece to be tested, wherein the bending radius of the flexible piece to be tested is R1, and the bending angle of the flexible piece to be tested is alpha.

The static bending test device provided by the embodiment of the application can realize static bending of a preset angle under a preset bending radius, and is strong in universality and wide in applicable scene. According to the static bending test device provided by the embodiment of the application, the static bending test of the flexible to-be-tested parts such as the flexible screen can be realized, so that the blank of the static bending test of the flexible screen is made up.

Alternatively, the flexible test piece may be a flexible screen.

The flexible screen is laminated each other by flexible apron and flexible display module group and is constituted usually, and flexible apron and flexible display module group all have the characteristic of buckling, carry out static bending test as required.

Alternatively, the flexible test piece may be a flexible cover plate. The flexible cover plate can be a transparent flexible glass cover plate or a transparent flexible plastic cover plate, so that the flexible display module can display through the flexible cover plate. In addition, the flexible cover plate can also be made of other materials, for example, the flexible cover plate can also be made of a composite material of flexible glass and flexible plastic.

Optionally, the flexible piece to be tested may be a flexible display module. For example, the flexible display module may be an organic light-emitting diode (OLED) display module, or may also be an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), or any other display module having a flexible and foldable property, which is not limited in this application.

Optionally, the flexible device under test may also be a Flexible Printed Circuit (FPC) or other device requiring a static bending test for bending test. That is to say, the static bending test device provided in the embodiment of the present application can perform a static bending test on other elements such as an FPC in addition to the elements related to the flexible screen, and the embodiment of the present application does not limit this.

Optionally, the first fixing part and the second fixing part may be fixing clamps, and the fixing clamps may include an upper clamp plate and a lower clamp plate to clamp and fix the flexible part to be tested.

Alternatively, the first fixing member and the second fixing member may be directly fixedly connected with the flexible member to be tested. At this time, in order to prevent the flexible member to be measured from being damaged by clamping, an elastic buffer device such as a rubber cushion may be provided on the connecting surface of the upper and lower clamping plates to prevent the flexible member to be measured from being damaged by clamping.

Optionally, the first fixing member and the second fixing member may also be indirectly fixedly connected with the flexible member to be tested. In the embodiment of the application, the first fixing member and the second fixing member are fixedly connected with the flexible member to be tested through the carrier film. At this moment, can with the fixed laminating of the flexible piece that awaits measuring on the carrier film, realize the fixed connection to the flexible piece that awaits measuring through the carrier film to can not bring the inaccurate problem of test result because first mounting and second mounting produce the damage to the flexible piece that awaits measuring.

Optionally, the carrier film may be a complete piece, and the area of the carrier film is larger than that of the flexible device to be tested, and the flexible device to be tested is completely attached to the middle of the carrier film.

Optionally, the carrier film may include two mutually independent pieces, one end of each piece is connected to the bottom surfaces of the two sides of the flexible piece to be tested, and the other end of each piece is connected to the first fixing piece and the second fixing piece.

Optionally, in other embodiments, the first fixing member and the second fixing member may also be other fixing devices such as a vacuum chuck, which is not limited in this application.

Alternatively, the first driving member may be a driving motor, and in this case, the rotational motion of the motor may be converted into the linear motion of the first fixing member by a power conversion mechanism. For example, the power conversion mechanism may be a roller-screw combination, a gear-rack combination, or the like, which is not limited in the present application.

Alternatively, the first driving member may be another power mechanism such as an air cylinder, which is not limited in this application.

In a possible design, the bending jig further comprises a circular arc-shaped second abutting surface, the second abutting surface is used for abutting against the flexible piece to be tested, and the curvature radius of the second abutting surface is R2; the device further comprises: the second driving piece is used for driving the second fixing piece to a second preset position so that the flexible piece to be tested is bent around the second abutting surface, and the bending angle is beta; the second driving piece is further used for keeping the second fixing piece at the second preset position so as to perform a static bending test on the flexible piece to be tested, wherein the bending radius of the flexible piece to be tested is R2, and the bending angle of the flexible piece to be tested is beta.

That is to say, the static bending test device that this application embodiment provided can carry out two static bending tests simultaneously to the flexible piece that awaits measuring of same piece to can improve efficiency of software testing.

In one possible design, the apparatus further includes: the second driving piece is used for driving the second fixing piece to a second preset position so that the flexible piece to be tested is bent around the first abutting surface, and the bending angle is beta; the second driving piece is further used for keeping the second fixing piece at the second preset position so as to perform a static bending test on the flexible piece to be tested, wherein the bending radius of the flexible piece to be tested is R2, and the bending angle of the flexible piece to be tested is beta.

In one possible design, the apparatus further includes: and the third driving piece is used for driving the bending jig to a third preset position.

In one possible design, the apparatus further includes: the first auxiliary bending piece is used for extruding the flexible piece to be tested between the bending jig and the first fixing piece; and the fourth driving part is used for driving the first auxiliary bending part to a fourth preset position so as to extrude the flexible piece to be tested.

In one possible design, the apparatus further includes: the second auxiliary bending piece is used for extruding the flexible piece to be tested between the bending jig and the second fixing piece; and the fifth driving piece is used for driving the second auxiliary bending piece to a fifth preset position so as to extrude the flexible piece to be tested.

In a possible design, the device further includes a first mounting seat and a first guide rail, the first fixing member is pivotably connected to the first mounting seat, the first mounting seat is disposed on the first guide rail, and the first fixing member is driven by the first driving member to move relative to the first guide rail.

In a possible design, the device comprises a plurality of bending jigs, and the curvature radius of the first abutting surface of each bending jig is different from that of the first abutting surface of each bending jig; the device also comprises a mounting substrate, and the bending jig is detachably mounted on the mounting substrate. At this moment, the static bending test of the flexible piece to be tested under different bending radiuses can be realized by replacing the bending jig, so that the service efficiency of the static bending test device provided by the embodiment of the application can be improved.

In a second aspect, a static bending test system is provided, which includes an air conditioner, a temperature control box, and a static bending test device provided in any one of the possible designs of the first aspect, wherein the static bending test device is accommodated in the temperature control box, and the air conditioner is communicated with the temperature control box to adjust the temperature of the temperature control box.

Alternatively, the air conditioning device may include at least one of a refrigerating unit, a heating unit, a dehumidifying unit, and the like.

Optionally, the air conditioning device is a compressor refrigeration air conditioner.

In one possible design, the system further includes a controller electrically connected to the air conditioning unit and the electrical control element of the static bending test device, respectively.

Alternatively, the electrically controlled element of the static bend testing apparatus may comprise the respective driving members of the above-described embodiments.

Optionally, the temperature control box is further provided with a temperature sensor, and the temperature sensor is connected with the controller.

Optionally, the temperature sensor is a thermocouple.

In a possible design, the system further includes a camera and a display device electrically connected to the controller, respectively, the camera is configured to acquire a state image of the flexible member to be tested after being bent, and the display device is configured to display the state image.

Optionally, the camera is a charge coupled device camera (CCD).

In one possible design, the flexible part to be tested is a flexible screen, and the system further comprises a flexible screen lighting driving device, wherein the flexible screen lighting driving device is used for being electrically connected with the flexible screen. Therefore, when the flexible screen is tested, the flexible screen can be lightened through the flexible screen lightening driving device so as to observe whether the flexible screen has display defects such as dead spots, transverse striations and the like in a lightening state.

Drawings

Fig. 1 is a schematic structural diagram of an example of a static bending test apparatus according to an embodiment of the present disclosure.

Fig. 2 is a partially enlarged view of the area a in fig. 1.

Fig. 3 is a schematic structural diagram of another example of a static bending test apparatus according to an embodiment of the present disclosure.

Fig. 4 is a schematic view of the device shown in fig. 3 tested at 180 degrees both of the bending angles α and β.

Fig. 5 is a schematic structural diagram of another example of a static bending test apparatus according to an embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of another example of a static bending test apparatus according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of another example of a static bending test apparatus according to an embodiment of the present application.

Fig. 8 is a schematic structural view of the device of fig. 7 after the bending jig is replaced.

Fig. 9 is a schematic structural diagram of another example of a static bending test apparatus according to an embodiment of the present application.

FIG. 10 is a schematic structural diagram of a static bending test system according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, it is to be understood that the terms "upper", "lower", "side", "inner", "outer", and the like indicate orientations or positional relationships based on installation, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

With the gradual development of flexible display devices, test devices similar to the flip-type flexible display devices are beginning to gradually appear in the market. Above-mentioned current flexible screen test equipment places flexible display module on load-bearing platform, carries out the bidirectional bending of the book formula of turning over many times and tests, and the radius of buckling is controlled through gasket thickness. However, the bending test performed by the above test equipment is a dynamic bending test, and the bending capability of the flexible screen in a fixed bending state cannot be tested.

Accordingly, the present application provides a static bending test device and system, which can be used for testing the bending capability of a flexible screen in a fixed bending state.

In a first aspect, an embodiment of the present application first provides a static bending test device, where the static bending test device can be used to perform a static bending test on flexible to-be-tested members such as a flexible screen. Fig. 1 is a schematic structural diagram of a static bending test apparatus according to an embodiment of the present application. Fig. 2 is a partially enlarged view of the area a in fig. 1. As shown in fig. 1 and 2, the static bending test apparatus includes:

and the first fixing part 2 is used for fixedly connecting one end of the flexible part to be tested 4.

And the second fixing piece 3 is used for fixedly connecting the other end of the flexible piece to be tested 4.

The bending jig 1 is located between the first fixing piece 2 and the second fixing piece 3, the bending jig 1 comprises a first arc-shaped abutting surface 1a, the first abutting surface 1a is used for abutting against the flexible piece to be detected 4, and the curvature radius of the first abutting surface is R1.

The first driving element 6 is configured to drive the first fixing element 2 to a first preset position, so that the flexible element to be tested 4 is bent around the first abutting surface 1a, and the bending angle is α.

The first driving member 6 is further configured to keep the first fixing member 2 at the first preset position, so as to perform a static bending test on the flexible member to be tested 4, where the bending radius is R1 and the bending angle is α.

Specifically, the embodiment of the present application provides a static bending test device that can be used to carry out static bending test on a flexible piece 4 to be tested.

Alternatively, the flexible test piece 4 may be a flexible screen.

Alternatively, the flexible test piece 4 may be a flexible cover plate. The flexible cover plate can be a transparent flexible glass cover plate or a transparent flexible plastic cover plate, so that the flexible display module can display through the flexible cover plate. In addition, the flexible cover plate can also be made of other materials, for example, the flexible cover plate can also be made of a composite material of flexible glass and flexible plastic.

Optionally, the flexible device under test 4 may be a flexible display module. For example, the flexible display module may be an organic light-emitting diode (OLED) display module, or may also be an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), or any other display module having a flexible and foldable property, which is not limited in this application.

Alternatively, the flexible device under test 4 may also be a Flexible Printed Circuit (FPC) or other device that needs to be subjected to a static bending test. That is to say, the static bending test device provided in the embodiment of the present application can perform a static bending test on other elements such as an FPC in addition to the elements related to the flexible screen, and the embodiment of the present application does not limit this.

Here, the first fixing member 2 and the second fixing member 3 are used to fixedly connect opposite sides of the flexible member to be measured 4, respectively. The type of the first fixing member 2 and the second fixing member 3 is not limited in the embodiment of the present application, and the type of the first fixing member 2 and the type of the second fixing member 3 may be the same or different.

Alternatively, the first fixing member 2 and the second fixing member 3 may be fixing clamps, and the fixing clamps may include an upper clamping plate and a lower clamping plate to clamp and fix the flexible member to be tested 4.

Alternatively, the first fixing member 2 and the second fixing member 3 may be fixedly connected directly to the flexible member to be tested 4. At this time, in order to prevent the flexible test object 4 from being damaged by clamping, an elastic buffer device such as a rubber cushion may be provided on the connecting surface of the upper and lower clamping plates to prevent the flexible test object 4 from being damaged by clamping.

Alternatively, the first fixing member 2 and the second fixing member 3 may also be indirectly fixedly connected to the flexible device under test 4. As shown in fig. 1, in the embodiment of the present application, the first fixing member 2 and the second fixing member 3 are fixedly connected to the flexible device under test 4 through the carrier film 5. At this moment, can fix the laminating of flexible piece 4 that awaits measuring on carrier film 5, realize the fixed connection to flexible piece 4 that awaits measuring through carrier film 5 to can not bring the inaccurate problem of test result because first mounting 2 and second mounting 3 produce the damage to flexible piece 4 that awaits measuring.

Optionally, the carrier film 5 may be a complete piece, and the area of the carrier film is larger than that of the flexible device to be tested 4, and the flexible device to be tested 4 is completely attached to the middle of the carrier film 5.

Alternatively, the carrier film 5 may include two mutually independent pieces, one end of which is connected to the bottom surfaces of the two sides of the flexible device under test 4, and the other end of which is connected to the first fixing member 2 and the second fixing member 3.

Alternatively, in other embodiments, the first fixing member 2 and the second fixing member 3 may also be other fixing devices such as a vacuum chuck, which is not limited in this application.

The bending jig 1 is located between the first fixing part 2 and the second fixing part 3 and used for abutting the flexible part to be tested 4 so as to realize bending of the flexible part to be tested 4.

As shown in fig. 1, the bending jig 1 includes a first contact surface 1a having a circular arc shape, and a curvature radius of the first contact surface is R1. The first abutting surface 1a is used for abutting against the flexible piece to be detected 4, the first abutting surface 1a extends in the direction perpendicular to the paper surface and is a part of the whole cylindrical side wall, and the first abutting surface 1a is used for abutting against the flexible piece to be detected 4, so that the abutted flexible piece to be detected 4 can be bent around the first abutting surface 1a under the driving of the first fixing piece 2.

In this embodiment, the first fixing member 3 can move under the driving of the first driving member 6, and then the flexible member 4 to be tested is driven to bend around the first abutting surface 1 a.

In the embodiment of the present application, the first driving member 6 may be a driving motor, and in this case, the rotational motion of the motor may be converted into the linear motion of the first fixing member 3 by a power conversion mechanism. For example, the power conversion mechanism may be a roller-screw combination, a gear-rack combination, or the like, which is not limited in the present application.

In other embodiments, the first driving member 6 may be another power mechanism such as an air cylinder, which is not limited in the present application.

When the static bending test is performed, the first driving member 6 may drive the first fixing member 2 to a first preset position, so that the flexible member to be tested 4 is bent around the first abutting surface 1a, and the bending angle is α.

The angle α is an angle at which the flexible to-be-detected piece 4 is bent around the first abutting surface 1a, as shown in fig. 2, after the flexible to-be-detected piece 4 is bent, a first portion 41 and a second portion 42 are formed, the first portion 41 is attached to a horizontal plane of the bending jig 1, the second portion 42 is tangent to the first abutting surface 1a, and the angle α is an angle formed between an extension line of the first portion 41 and the second portion 42.

Alternatively, the value of α may be anywhere between 0 and 180 degrees, depending on the particular product requirements. For example, the angle may be 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 180 degrees, or the like.

Alternatively, in other embodiments, the radius of curvature of the first abutting surface is set to be R1 large enough, and the value of α may be greater than 180 degrees, may be any value between 180 degrees and 360 degrees, and may be 210 degrees, 270 degrees, 300 degrees, or the like, for example.

After the first fixing member 2 moves to the first preset position, the first driving member 6 is further configured to keep the first fixing member 2 at the first preset position, so as to perform a static bending test on the flexible member to be tested 4, where the bending radius is R1 and the bending angle is α.

For example, the first fixing element 2 may be kept at the first predetermined position for 30 minutes, 1 hour, two hours, 3 hours, 6 hours, 8 hours, 16 hours, 24 hours, and 48 hours, and then the flexible device under test 4 may be observed to see if cracking, bulging, edge warping, and the like have occurred.

In addition, for the flexible display screen, the flexible display screen can be electrified to observe whether the flexible display screen has display defects such as dead spots, transverse stripes and the like in a static bending state.

Alternatively, the radius of curvature R1 (i.e., the bending radius) of the first abutting surface may be any one of 0.5, 0.8, 1, 1.5, 2, 3, 5, 8, 10, 12, 15, 20, 25 mm, and the like.

Optionally, the static bending test device may include a plurality of bending jigs 1, and the curvature radius of the first abutting surface 1a of each bending jig 1 is different; the device also comprises a mounting substrate 7, and the bending jig 1 is detachably mounted on the mounting substrate 7. At this moment, the static bending test of the flexible piece to be tested 4 under different bending radiuses can be realized by replacing the bending jig 1, so that the use efficiency of the static bending test device provided by the embodiment of the application can be improved.

Optionally, in order to achieve better movement control of the first fixing element 2, the device further includes a first mounting seat 8 and a first guide rail 9, the first fixing element 2 is pivotably connected to the first mounting seat 8, the first mounting seat 8 is disposed on the first guide rail 9, and can move (i.e., move left and right in fig. 1) relative to the first guide rail 9 under the driving of the first driving element 6. For example, the first mount 8 may slide or roll on the first rail 9.

Optionally, the first fixing member 2 is pivotally connected to the first mounting seat 8, so that when the first mounting seat 8 is moved to any position, the first fixing member 2 does not rotate relative to the flexible member to be tested 4.

Alternatively, the first fixing member 2 may be pivotably connected to the first mounting seat 8 by a first rotating shaft 10.

Fig. 3 is a schematic structural diagram of another example of a static bending test apparatus according to an embodiment of the present disclosure. In contrast to the devices shown in fig. 1 and 2, fig. 3 provides a device in which the bending jig 1 further includes a second contact surface 1b having a circular arc shape.

Specifically, as shown in fig. 3, the bending jig 1 further includes a second abutting surface 1b in a circular arc shape, the second abutting surface 1b is used for abutting against the flexible object 4 to be measured, and a curvature radius of the second abutting surface is R2. The second abutting surface 1b is opposite to the first abutting surface 1a, and is located at two ends of the bending jig 1. That is, the bending jig 1 in the embodiment of the present application is a two-side bending measurement jig.

As shown in fig. 3, the device further includes a second driving element 11, configured to drive the second fixing element 3 to a second preset position, so that the flexible element to be tested 4 is bent around the second abutting surface 1b, and the bending angle is β;

the second driving member 11 is further configured to maintain the second fixing member 3 at the second preset position, so as to perform a static bending test on the flexible member to be tested 4, where the bending radius is R2 and the bending angle is β.

That is to say, the static bending test device provided by the embodiment of the application can simultaneously perform two static bending tests on the same flexible piece to be tested 4, so that the test efficiency can be improved.

Alternatively, the type of the second driving member 11 may be the same as or different from that of the first driving member 6, which is not limited in the present application. For example, the second driving member 11 may be any one of a driving motor, an air cylinder, or the like.

Alternatively, the radius of curvature R2 may be the same as or different from the radius of curvature R1, which is not limited in this application. The value range of R2 is the same as that of R1, and is not described herein again.

As shown in fig. 3, the bending angle β is an angle formed between an extension of the first portion 41 and the third portion 43. The bending angle β may be the same as or different from the bending angle α, and is not limited in this application. The value range of β is the same as the value range of α, and is not described herein again.

Similarly, as shown in fig. 3, in order to achieve better movement control of the second fixing element 3, the device further includes a second mounting seat 12 and a second guide rail 13, the second fixing element 3 is pivotally connected to the second mounting seat 12, the second mounting seat 12 is disposed on the second guide rail 13, and can move (i.e., move left and right in fig. 3) relative to the second guide rail 13 under the driving of the second driving element 11. For example, the second mount 12 may slide or roll on the second rail 13.

Optionally, the second fixing member 3 is pivotally connected to the second mounting seat 12, so that when the second mounting seat 12 is moved to any position, the second fixing member 3 does not rotate relative to the flexible member to be tested 4.

Alternatively, the second fixing member 3 may be pivotally connected to the second mounting base 12 via a second rotating shaft 14.

Alternatively, the first rail 9 and the second rail 13 may be common rails, and at this time, the first mount 8 and the second mount 12 may be disposed at the same level.

Optionally, the bending angle to be tested may not be reached only by moving the fixing member, in this case, the apparatus provided in the embodiment of the present application further includes a third driving member 15, and at this time, the bending jig 1 may be driven to a third preset position by the third driving member 15, so as to reach the preset bending angle.

The device that this application embodiment provided still includes the third driving piece 15 that is used for the drive tool 1 of buckling, for example, this third driving piece 15 can drive tool 1 of buckling and reciprocate along vertical direction in fig. 3 to the regulation of realization angle of buckling that can be more convenient.

Alternatively, the third driving member 15 may be connected to the mounting substrate 7, and the driving of the bending jig 1 is realized through the mounting substrate 7.

Fig. 4 is a test diagram of the static bending test device shown in fig. 3 in a state that both bending angles α and β are 180 degrees.

As shown in fig. 4, the first fixing member 2 and the second fixing member 3 are moved inward, so that both ends of the flexible device under test 4 are respectively bent 180 degrees around the first abutting surface 1a and the second abutting surface 1b, and are kept at the positions for a while, so as to perform a corresponding static bending test.

Compared with the device shown in the previous figures, the device provided in fig. 5 has the bending jig 1 vertically arranged, and the first abutting surface 1a at the upper end portion and the flexible member to be measured 4 abut against each other. That is, the bending jig 1 in the embodiment of the present application is a middle bending measurement jig.

Because the first fixing member 2 and the second fixing member 3 are respectively located at two sides of the bending jig 1, at this time, the first fixing member 2 and the second fixing member 3 can respectively drive the flexible member to be tested 44 to bend around two sides of the first abutting surface 1 a.

Similarly, the second driving element 11 can drive the second fixing element 3 to a second preset position, so that the flexible piece to be tested 4 is bent around the first abutting surface 1a, and the bending angle is β; the second driving member 11 is further configured to keep the second fixing member 3 at the second preset position, so as to perform a static bending test on the flexible member to be tested 4, where the bending radius is R2 and the bending angle is β.

Fig. 6 is a schematic structural diagram of another example of a static bending test apparatus according to an embodiment of the present application. As shown in fig. 6, compared to the aforementioned embodiment shown in fig. 5, in the embodiment of the present application, an auxiliary bending member is further included to assist the fixing member to bend the flexible member to be tested 4.

The bending angle to be tested may not be reached only by moving the fixing member and the bending jig 1, in this case, the apparatus provided in the embodiment of the present application further includes:

the first auxiliary bending piece 17 is used for extruding the flexible piece to be tested 4 between the bending jig 1 and the first fixing piece 2; and the fourth driving part 18 is used for driving the first auxiliary bending part 17 to a fourth preset position so as to extrude the flexible piece to be tested 4.

The second auxiliary bending piece 30 is used for extruding the flexible piece to be tested 4 between the bending jig 1 and the second fixing piece 3; and the fifth driving part 31 is used for driving the second auxiliary bending part 30 to a fifth preset position so as to extrude the flexible part to be tested 4.

In the case where it is determined that the desired bending angle cannot be achieved only by moving the fixing member and the bending jig 1, the auxiliary bending may be performed by the auxiliary bending member. Specifically, at this time, the fourth driving part 18 may be controlled to drive the first auxiliary bending part 17 to the fourth preset position to extrude the flexible device under test 4, and the fifth driving part 31 may be controlled to drive the second auxiliary bending part 30 to the fifth preset position to extrude the flexible device under test 4. Thereby achieving a predetermined bending angle.

Alternatively, in the present embodiment, the first auxiliary bending member 17 and the second auxiliary bending member 30 may be push blocks.

Alternatively, in the case where a desired bending angle can be achieved by moving the fixing member and the bending jig 1, the first auxiliary bending member 17 and the second auxiliary bending member 30 do not need to be operated. At this time, the fourth driving element 18 and the fifth driving element 31 can respectively drive the first auxiliary bending element 17 and the second auxiliary bending element 30 to be away from the bending fixture 1.

As shown in fig. 7, compared to the embodiment shown in the previous drawings, in the embodiment of the present application, the third driving element 15 drives the second fixing element 3 and the bending jig 1 to move simultaneously, so that no relative displacement occurs between the second fixing element 3 and the bending jig 1, and only the first fixing element 2 and the bending jig 1 can perform relative displacement, that is, the flexible device under test 4 can only bend around the first abutting surface 1 a. That is, the bending jig 1 in the embodiment of the present application is a single-side bending measurement jig.

As shown in fig. 7, the mounting substrate 7 may be used for mounting the second fixing member 3 and the bending jig 1 at the same time.

Alternatively, the bending jig 1 is detachably mounted on the mounting substrate 7. At this time, the size of the bending radius can be changed by replacing the bending jig 1. For example, the radius of curvature of the first abutment surface 1a in fig. 7 is 0.5 mm, and the radius of curvature of the first abutment surface 1a in fig. 8 is 15 mm.

Fig. 8 is a schematic structural view of the device provided in fig. 7 after the bending jig 1 is replaced. In fig. 8, the curvature radius of the first abutting surface 1a is 15 mm, and at this time, since the bending radius is relatively large, the purpose of bending 180 degrees can be achieved only by moving the first fixing member 2 and the bending jig 1 (i.e. at this time, α is 180 degrees).

As shown in fig. 9, compared to the aforementioned embodiments shown in fig. 7 and fig. 8, in the embodiment of the present application, a first auxiliary bending member 17 is further included to assist the first fixing member 2 in bending the flexible device under test 4.

When the bending radius is smaller, the bending angle to be tested may not be reached only by moving the first fixing member 2 and the bending jig 1, and in this case, the apparatus provided in the embodiment of the present application further includes:

In the case where it is determined that a desired bending angle (for example, 180 degrees) cannot be achieved only by moving the first fixing member 2 and the bending jig 1, the auxiliary bending may be performed by the first auxiliary bending member 17.

Specifically, at this time, the fourth driving part 18 may be controlled to drive the first auxiliary bending part 17 to a fourth preset position, so as to extrude the flexible member to be tested 4, thereby achieving the preset bending angle.

Alternatively, in the present embodiment, the first auxiliary bending member 17 may be a push rod.

Alternatively, the fourth driving member 18 may be connected to the push rod 17 through the push rod bracket 19 to drive the push rod 17 to press the flexible member to be tested 4.

Optionally, the push rod 17 is rotatably disposed on the push rod bracket 19 for protecting the flexible member to be tested 4.

Optionally, in order to protect the flexible dut 4, the outer surface of the push rod 17 is provided with an elastic buffer layer, which may be, for example, an elastic rubber layer.

Alternatively, in the case where a desired bending angle can be achieved by moving the first fixing member 2 and the bending jig 1, the first auxiliary bending member 17 does not need to be operated. At this time, the fourth driving member 18 can drive the first auxiliary bending member 17 to move away from the bending jig 1.

In a second aspect, an embodiment of the present application further provides a static bending test system, and fig. 10 is a schematic structural diagram of the static bending test system provided in the embodiment of the present application.

The test system comprises an air conditioning device 20, a temperature control box 27 and a test device provided by any one of the embodiments, wherein the test device is accommodated in the temperature control box 27, and the air conditioning device 20 is communicated with the temperature control box to regulate the temperature of the temperature control box.

Specifically, the testing device is disposed in the temperature control box 27, the temperature control box 27 is communicated with the air conditioning device 20, the air inlet pipe 20a of the air conditioning device 20 is communicated with the temperature control box 27 to supply air into the temperature control box 27, and the air return pipe 20b of the air conditioning device 20 is also communicated with the temperature control box 27 to recover the return air discharged from the temperature control box 27, so as to control the temperature of the temperature control box 27. The static bending test system provided by the embodiment of the application can realize static bending test on the flexible piece to be tested 4 in the set temperature environment.

Alternatively, the air conditioner 20 can also implement humidity control of the temperature control box 27. Therefore, the static bending test system provided by the embodiment of the application can realize static bending test on the flexible piece to be tested 4 under the set temperature and humidity environment.

Alternatively, the air conditioning device 20 may include at least one of a refrigerating unit, a heating unit, a dehumidifying unit, and the like.

Alternatively, the air conditioning device 20 is a compressor refrigeration air conditioner.

Optionally, the system further includes a controller 21, and the controller 21 is electrically connected to the air conditioning device 20 and the electric control element of the static bending test device, so as to realize automatic control of the system.

Optionally, the temperature control box 27 is further provided with a temperature sensor 23, and the temperature sensor 23 is connected with the controller 21.

Optionally, the temperature sensor 23 is a thermocouple.

Optionally, the system further includes a camera 22 and a display device 24 electrically connected to the controller 21, respectively, where the camera 22 is configured to collect a state image of the flexible device under test 4 after being bent, and the display device 24 is configured to display the state image.

Alternatively, the camera 22 is a charge coupled device camera (CCD).

Optionally, the flexible workpiece may be a flexible screen, and the system further includes a flexible screen lighting driving device 26, where the flexible screen lighting driving device 26 is configured to be electrically connected to the flexible screen. Therefore, during testing, the flexible screen can be lightened through the flexible screen lightening driving device 26 so as to observe whether the flexible screen has display defects such as dead spots, transverse striations and the like in a lightening state.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A static bending test device is characterized by comprising:

the first fixing piece (2) is used for fixedly connecting one end of the flexible piece to be detected (4);

the second fixing piece (3) is used for fixedly connecting the other end of the flexible piece to be detected (4);

the bending jig (1) is positioned between the first fixing piece (2) and the second fixing piece (3), the bending jig (1) comprises a circular arc-shaped first abutting surface (1a), the first abutting surface (1a) is used for abutting against the flexible piece to be detected (4), and the curvature radius of the first abutting surface is R1;

the first driving piece (6) is used for driving the first fixing piece (2) to a first preset position so that the flexible piece to be tested (4) can be bent around the first abutting surface (1a), and the bending angle is alpha;

the first driving piece (6) is further used for keeping the first fixing piece (2) at the first preset position so as to perform a static bending test with a bending radius of R1 and a bending angle of alpha on the flexible piece to be tested (4).

2. The device according to claim 1, wherein the bending jig (1) further comprises a second abutment surface (1b) in the shape of a circular arc, the second abutment surface (1b) is used for abutting against the flexible piece to be tested (4), and the radius of curvature of the second abutment surface is R2;

the device further comprises:

the second driving piece (11) is used for driving the second fixing piece (3) to a second preset position so that the flexible piece to be tested (4) can be bent around the second abutting surface (1b), and the bending angle is beta;

the second driving piece (11) is further used for keeping the second fixing piece (3) at the second preset position so as to perform a static bending test with a bending radius of R2 and a bending angle of beta on the flexible piece to be tested (4).

3. The apparatus of claim 1, further comprising:

the second driving piece (11) is used for driving the second fixing piece (3) to a second preset position so that the flexible piece to be tested (4) can be bent around the first abutting surface (1a), and the bending angle is beta;

4. The apparatus of any one of claims 1-3, further comprising:

and the third driving piece (15) is used for driving the bending jig (1) to a third preset position.

5. The apparatus of any of claims 1-4, further comprising:

the first auxiliary bending piece (17) is used for extruding the flexible piece to be tested (4) between the bending jig (1) and the first fixing piece (2);

and the fourth driving part (18) is used for driving the first auxiliary bending part (17) to a fourth preset position so as to extrude the flexible piece to be tested (4).

6. The apparatus of any one of claims 1-5, further comprising:

the second auxiliary bending piece (30) is used for extruding the flexible piece to be tested (4) between the bending jig (1) and the second fixing piece (3);

and the fifth driving piece (31) is used for driving the second auxiliary bending piece (30) to a fifth preset position so as to extrude the flexible piece to be tested (4).

7. The device according to any one of claims 1 to 6, characterized in that the device further comprises a first mounting base (8) and a first guide rail (9), the first fixing member (2) being pivotably connected to the first mounting base (8), the first mounting base (8) being arranged on the first guide rail (9) and being movable relative to the first guide rail (9) by the first driving member (6).

8. Device according to any one of claims 1 to 7, characterized in that it comprises a plurality of said bending jigs (1), each bending jig (1) having a curvature radius of said first abutment surface (1a) that is different from each other;

the device further comprises a mounting substrate (7), and the bending jig (1) is detachably mounted on the mounting substrate (7).

9. A static bending test system, comprising an air conditioning device (20), a temperature controlled box (27) and a static bending test device according to any one of claims 1 to 8, the static bending test device being accommodated in the temperature controlled box (27), the air conditioning device (20) being in communication with the temperature controlled box for temperature regulation of the temperature controlled box.

10. The system according to claim 9, characterized in that it further comprises a controller (21), said controller (21) being electrically connected to the electric control elements of the air conditioning device (20) and the static bending test device, respectively.

11. The system according to claim 10, further comprising a camera (22) and a display device (24) electrically connected to the controller (21), respectively, wherein the camera (22) is used for collecting the status image of the flexible piece to be tested (4) after being bent, and the display device (24) is used for displaying the status image.

12. The system according to claim 10 or 11, wherein the flexible test piece (4) is a flexible screen, the system further comprising a flexible screen illumination driving device (26), the flexible screen illumination driving device (26) being configured to be electrically connected to the flexible screen.