WO2019165608A1

WO2019165608A1 - Device and method for testing cyclic bending life of flexible display

Info

Publication number: WO2019165608A1
Application number: PCT/CN2018/077616
Authority: WO
Inventors: 李姗姗
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-02-28
Filing date: 2018-02-28
Publication date: 2019-09-06
Also published as: CN111801566A

Abstract

Provided are a device and method for testing cyclic bending life of a flexible display. One end of a flexible display (110) to be tested is fixed on a static platform (10), and the other end is fixed on a moving platform (20) that is located on a plane in different height from the static platform (10), so that the flexible display (110) bends naturally to form a curved surface. Moreover, the static platform (10) is adjusted in a second direction, the curvature of the curved surface can be changed, so as to reach specified curvature that is required in testing, and different testing requirements for different types of flexible displays (110) can be met. Furthermore, the moving platform (20) moves back and forth in a first direction, and the distance between two ends of the flexible display (110) may change continuously, so that the position of the curved surface can change continuously, so as to test the cyclic bending life of the flexible display (110).

Description

Flexible display cycle bending life testing device and testing method

Technical field

The invention relates to the technical field of detection, in particular to a flexible display screen cyclic bending life testing device and a testing method.

Background technique

In the gradual development of display technology, flexible displays have attracted much attention in the display industry. The flexible display is flexible, flexible and foldable, which can bring more excellent experience to users, and is also an important topic in the field of display research. Among them, the flex life of the flexible display is an important indicator for evaluating the excellent display.

At present, the bending life testing equipment in the industry is very few and less mature, and the effective radius of curvature and smooth cyclic bending motion are important indicators of the bending life testing equipment.

Summary of the invention

The invention provides a test device and a test method capable of better testing the cyclic bending life of a flexible display screen.

The flexible display cycle bending life testing device includes a fixed platform and a moving platform disposed in parallel with the fixed platform, wherein the fixed platform and the moving platform have a height difference; the moving platform and the fixed platform The movable and movable directions are vertical to adjust a height difference between the fixed platform and the moving platform, the fixed platform is parallel to a plane of the moving platform; and the fixed platform and the moving platform are respectively used Fixing the opposite ends of the flexible display screen and the flexible display screen is in a curved state, and adjusting the curvature of the flexible display screen by adjusting the height difference between the fixed platform and the moving platform, The moving platform adjusts the bending position of the flexible display screen.

The flexible display cycle bending life test method includes the steps of:

Providing a flexible display cycle bending life testing device, and fixing one end of the flexible display to be tested to a fixed platform of the flexible display cycle bending life testing device;

After bending the flexible display screen to be tested, the other end thereof is fixed on the moving platform of the flexible display screen cyclic bending life testing device, and the curved portion of the flexible display screen is curved to form a circular arc surface;

Adjusting a height difference between the fixed platform and the moving platform to a preset value;

The moving platform is reciprocated to change the bending position of the flexible display screen.

The flexible display cycle bending life testing device and the flexible display cycle bending life testing method of the present invention, by fixing one end of the flexible display screen to be tested to the fixed platform, and fixing the other end to The fixed platform is located on the moving platform of a plane of different heights such that the flexible display screen naturally bends to form a curved surface. And, by adjusting the fixed platform in the second direction, the height difference between the fixed platform and the moving platform can be changed, thereby changing the curvature of the curved surface to achieve a prescribed curvature required for testing, and Can meet different testing needs of different types of flexible displays. Further, by moving the moving platform back and forth in the first direction, the distance between the two ends of the flexible display screen can be constantly changed, so that the position of the curved surface can be continuously changed, so that the flexibility Each position of the display screen can be bent, and the cyclic bending of the flexible display screen is achieved, thereby testing the cyclic bending life of the flexible display screen.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic structural view of a flexible display cycle bending life testing device of the present invention;

2(a) and 2(b) are schematic views showing the operation of the present invention;

3 is a partial structural schematic view of a flexible display screen cyclic bending life testing device according to the present invention;

4 is a wireframe diagram of a partial structure of the flexible display cycle bending life testing device of FIG. 3;

5 is a partial structural schematic view of a flexible display screen cycle bending life testing device according to the present invention;

6 is a wireframe diagram of a partial structure of the flexible display cycle bending life testing device of FIG. 5;

7 is a flow chart of a method for testing a cyclic bending life of a flexible display screen according to the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1, the present invention provides a flexible display cycle bending life testing device 100 for performing a life test of cyclic bending of a flexible display screen 110. The flexible display cycle bending life testing device 100 includes a fixed platform 10 and a moving platform 20 disposed in parallel with the fixed platform 10. The height of the fixed platform 10 and the plane of the moving platform 20 is different, and the fixed platform 10 and the moving platform 20 have a height difference. The moving platform 20 is movable in a first direction X, and the fixed platform 10 is movable in a second direction Y. The first direction X is perpendicular to the second direction Y. By moving the movable platform 20 in the first direction X, the relative position between the movable platform 20 and the fixed platform 10 in the first direction X can be adjusted. The height difference between the fixed platform 10 and the moving platform 20 is adjusted by moving the fixed platform 10 in the second direction Y. The planes of the fixed platform 10 and the movable platform 20 are both parallel to the first direction X and perpendicular to the second direction Y. In this embodiment, the fixed platform 10 is one, and the fixed platform 10 is disposed opposite to the moving platform 20. It can be understood that, in other embodiments, the fixed platform 10 and the moving platform 20 are also You can stagger the settings.

Referring to FIG. 1 , the fixed platform 10 of the flexible display cycle bending life testing device 100 may be plural, and the plurality of fixed platforms 10 are spaced apart along the third direction Z. The third direction is perpendicular to both the first direction X and the second direction Y. Wherein, the plurality of fixed platforms 10 all correspond to one of the moving platforms 20, thereby simultaneously performing cyclic bending life testing of a plurality of the flexible display screens 110.

Referring to FIG. 2(a) and FIG. 2(b), when the flexible display screen 100 to be tested is tested by the flexible display cycle bending life testing device 100, the flexible display 110 to be tested is One end is fixed to the fixed platform 10, and the other end is fixed to the moving platform 20. The flexible display screen is fixed when the two ends of the flexible display screen 110 are respectively fixed on the fixed platform 10 and the movable platform 20, because the height difference between the fixed platform 10 and the movable platform 20 is fixed. 110 will produce a natural bend, and the position of the bend will produce a circular arc-shaped curved surface, and the radius of curvature of the curved surface is half of the height difference between the fixed platform 10 and the movable platform 20. Thus, the curvature of the flexible display screen 110 can be adjusted to the desired curvature value by adjusting the height difference between the fixed platform 10 and the moving platform 20. Compared with the prior art in which the flexible display screen 110 is bent by a round roller, the present invention does not need to provide the round roller, thereby avoiding the contact of the round roller with the flexible display screen 110. Friction damage to the flexible display screen 110 by the round roller is avoided. At the same time, any adjustment of the curvature of the arc-shaped curved surface can be achieved to meet different testing requirements of different types of flexible display screens 110. Further, the bending position of the flexible display screen 110 can be adjusted by moving the movable platform 20 in the first direction X. Specifically, since both ends of the flexible display screen 110 are respectively fixed to the fixed platform 10 and the movable platform 20, the moving platform 20 is moved along the first direction X to adjust the fixed platform 10 and the The relative positions between the platforms 20 in the first direction X are described, thereby changing the relative positions of the two ends of the flexible display screen 110 in the first direction X, thereby adjusting the bending position of the flexible display screen 110. By driving the moving platform 20 to reciprocate in the first direction X, it is possible to perform a cyclic bending test on each position of the flexible display screen 110, and then test the cyclic bending life of the flexible display screen 110. In this embodiment, the fixed platform 10 is disposed opposite to the moving platform 20, so that when the two ends of the flexible display 110 are respectively fixed on the fixed platform 10 and the moving platform 20, the flexible display The screen 110 is bent in a bending direction to enable testing of the bending life of the flexible display screen 110 when bent in this direction. It can be understood that, in other embodiments of the present invention, the fixed platform 10 and the moving platform 20 are staggered such that both ends of the flexible display 110 are respectively fixed to the fixed platform 10 and the When the platform 20 is moved, the flexible display screen 110 is bent in other bending directions, so that the bending life of the flexible display screen 110 when bent in other directions can be tested.

When the plurality of fixed display screens 10 are multiple, one ends of the two flexible display screens 110 may be respectively fixed on the two fixed platforms 10, and the other ends of the two flexible display screens 110 are fixed at the same The platform 20 is described. By adjusting the height difference between the two fixed platforms 10 and the moving platform 20 to be the same or different, it is possible to simultaneously achieve a cyclic bending life test of the same curvature of the two flexible display screens 110 or a cycle life of different curvatures. Test to improve test efficiency.

Further, referring to FIG. 1 , the flexible display cycle bending life testing device 100 further includes a housing 30 , a moving platform driving portion 40 , and a fixed platform driving portion 50 . The outer casing 30 includes a first fixing plate 31 and a second fixing plate 32 perpendicularly connected to the first fixing plate 31. The first fixing plate 31 and the second fixing plate 32 are each a rectangular plate, and the second fixing plate 32 is fixed to an edge of the first fixing plate 31. The movable platform driving unit 40 is disposed on the first fixing plate 31 , and the fixed platform driving unit 50 is disposed on the second fixing plate 32 . The moving platform 20 is coupled to the moving platform driving unit 40 to drive the moving platform 20 to move in the first direction X by the moving platform driving unit 40. The fixed platform 10 is coupled to the fixed platform driving portion 50 to drive the fixed platform 10 to move in the second direction Y by the fixed platform driving portion 50.

Referring to FIGS. 3 and 4 , the movable platform driving unit 40 includes a slide rail 41 , a slider 42 , and a driving member 43 . The slide rails 41 are at least two, and the at least two slide rails 41 are spaced apart and extend along the first direction X. The movable platform 20 is connected to the slide rail 41 via a slider 42. In this embodiment, the slide rails 41 are three, two of which correspond to opposite sides of the movable platform 20, and the other one is located between the two of the slide rails 41. Therefore, the movable platform 20 is stably supported by the three slide rails 41 and the corresponding sliders 42, and the movable platform 20 can be driven to perform smooth movement. It can be understood that the sliding rails 41 may also be two or more strips, and the specific number thereof may be correspondingly changed according to the size of the moving platform 20 or the like. The driving member 43 is connected to the moving platform 20 and is used for driving the moving platform 20 to slide along the sliding rail 41. In this embodiment, the driving member 43 includes a screw rod 431 parallel to the sliding rail 41, a motor 432 connected to one end of the screw rod 431, and a sliding member connecting the moving platform 20 and the screw rod 431. 433. The slider 433 is fixed to a surface of the movable platform 20, and the screw 431 passes through the slider 433. The rotation of the screw 431 is performed by the motor 432 to rotate the screw 431 to drive the slider 433 to move on the screw 431, thereby driving the movable platform 20 along the first direction X. Move. In other embodiments of the present invention, the driving member 43 may also be a pneumatic rail parallel to the sliding rail 41, and the moving platform 20 is connected to the pneumatic rail through the slider 42 to pass the pneumatic The guide rail drives the movable platform 20 to move in the first direction X.

Referring to FIGS. 5 and 6 , the fixed platform driving unit 50 includes a guide rail 51 , a slider 52 , and an adjusting member 53 . The guide rail 51 extends along the second direction Y, and one end of the fixed platform 10 is connected to the guide rail 51 through a slider 52, so that the fixed platform 10 moves along the guide rail 51 to realize the Movement of the platform 10 in the second direction Y. The adjusting member 53 is connected to the fixed platform 10 and drives the fixed platform 10 to move along the guide rail 51. In this embodiment, the adjusting member 53 includes a screw rod 531 disposed in parallel with the guide rail 51 and a sliding block 532 connecting the screw rod 531 and the fixed platform 10. The fixed platform 10 is connected to the lead screw 531 by the sliding block 532. When the screw 531 is driven to rotate, the sliding block 532 moves along the screw 531 to move the fixed platform 10 in the second direction Y. In this embodiment, one end of the screw rod 531 facing away from the first fixing plate 31 is provided with a height adjusting hand wheel 532, so that the screw rod 531 is manually driven by the height adjusting hand wheel 532 to realize rotation. The position of the platform 10 in the second direction Y is described. It can be understood that, in other embodiments of the present invention, an electric motor may be connected to one end of the screw rod 531, or the fixed platform 10 may be connected to a pneumatic guide rail extending in the second direction Y. Thereby an automatic adjustment of the position of the fixed platform 10 in the second direction Y is achieved.

Further, the fixed platform driving portion 50 further includes a locking member 54 by which the fixed platform 10 is locked and fixed in the second direction Y. In this embodiment, the locking member 54 is a lock nut, and the lock nut passes through the slider 52 and abuts against the inner wall of the rail 51, thereby locking the slider 52 by the nut. It is fixed on the guide rail 51, thereby locking and fixing the fixed platform 10 at the position of the second direction Y, thereby preventing the problem that the fixed platform 10 has a position change under the action of gravity or the like. It can be understood that the locking member 54 can also be a holding ring or the like, and the slider 52 is tightly fixed with the guide rail 51 by the holding ring, so that the fixed platform 10 is in the second direction. The position on Y changes.

Further, referring to FIG. 1 , the fixed platform 10 is detachably fixed with a pressing plate 11 , and the pressing plate presses one end of the flexible display 110 to the fixed platform 10 . A bead 21 is detachably fixed to the movable platform 20, and the bead presses and fixes the other end of the flexible display 110 to the movable platform 20. The detachable mounting of the flexible display panel 110 is facilitated by detachably fixing the pressing plate 11 on the fixed platform 10 and detachably fixing the pressing strip 21 on the movable platform 20. In this embodiment, the pressure plate has a rectangular plate shape, and one end of the pressure plate is detachably fixed to one side of the fixed platform 10 away from the movable platform 20, and the other end protrudes from the fixed platform 10. A portion of the pressing plate 11 extending from the fixed platform 10 corresponds to a portion of the moving platform 20, that is, a portion of the pressing plate 11 that protrudes from the fixed platform 10 in the second direction Y and the moving platform 20 is coincident, and the flexible display screen 110 is located between the pressure plate 11 and the movable platform 20. Therefore, the press plate 11 and the moving platform 20 ensure that the positions other than the curved surface of the circular arc generated by the bending of the flexible display screen 110 are kept flat, thereby achieving a more accurate cycle life of the flexible display screen 110. test. It can be understood that, in other embodiments of the present invention, the pressure plate 11 may also be elongated, and the pressure plate 11 is detachably fixed to one side of the fixed platform 10 toward the movable platform 20. At this time, the fixed platform 10 and the moving platform 20 partially overlap in the second direction Y, and the flexible display screen 110 is located between the fixed platform 10 and the moving platform 20, thereby The fixed platform and the movable platform ensure that the position other than the curved surface of the circular arc generated by the bending of the flexible display screen 110 is maintained as a plane.

Further, in the present invention, one side of the fixed platform 10 is provided with a scale extending along the second direction Y, and the scale is provided with a scale through which the fixed platform 10 and the seat can be known. The difference in coverage between the platforms 20 is described, thereby facilitating control of the amount of adjustment of the platform 10 in the second direction Y.

Further, referring to FIG. 1 , the flexible display cycle bending life testing device 100 of the present invention further includes a display window 70 through which the number of round trips of the moving platform 20 along the first direction X is displayed (ie Parameter information such as the number of cyclic bending of the flexible display screen 110, the height difference between the movable platform 20 and the fixed platform 10, the stroke of the moving platform 20 along the first direction X, and the like, thereby enabling The result of the cyclic bending life test of the flexible display 110 is intuitively known.

Further, the flexible display cycle bending life testing device 100 of the present invention further includes an emergency stop switch 80, which is turned on when the flexible display cycle bending life testing device 100 experiences an abnormal operation. The closing of the flexible display cycle bending life testing device 100 can be achieved, thereby avoiding damage to the flexible display cycle bending life testing device 100.

Further, referring to FIG. 7, the present invention provides a flexible display screen 110 cyclic bending life testing method, and the flexible display screen 110 cyclic bending life testing method includes:

Step 110: Providing the flexible display cycle bending life testing device 100, and fixing one end of the flexible display 110 to be tested to the fixed platform 10 of the flexible display cycle bending life testing device 100. In this embodiment, one end of the flexible display screen 110 is clamped between the fixed platform 10 and the pressure plate 11 to be fixed on the fixed platform 10.

Step 120: The flexible display screen 110 to be tested is bent and the other end is fixed to the movable platform 20 of the flexible display cycle bending life testing device 100. The bend of the flexible display screen 110 is curved to form a circular arc surface, and the diameter of the circular arc surface is the same as the height difference between the fixed platform 10 and the movable platform 20. In this embodiment, one end of the flexible display screen 110 is clamped between the moving platform 20 and the bead 21 to be fixed on the moving platform 20. Step 130: Adjust a height difference between the fixed platform 10 and the moving platform 20 to a predetermined value. Wherein, the prescribed value varies according to the type of the flexible display to be tested and the detection requirements.

Step 140: Reciprocally move the moving platform 20 to change the bending position of the flexible display screen 110.

Further, the method for testing the cyclic bending life of the flexible display screen 110 further includes:

Step 150: After completing the cyclic bending life test of the flexible display screen 110, the flexible display screen 110 to be tested is removed to prepare for the next test. Wherein, according to different requirements of the test, the flexible bending display 110 has different cycle bending life test. For example, it may be determined whether the flexible display screen 110 has a problem after the specified number of cyclic bending times, whether the cyclic bending life of the flexible display screen 110 meets the requirement is satisfied; or the flexible display screen 110 is cyclically bent to It is damaged, so that the flexible display screen 110 has a cyclic bending life.

The flexible display screen cyclic bending life testing device 100 and the testing method of the present invention are characterized in that one end of the flexible display screen 110 to be tested is fixed on the fixed platform 10, and the other end is fixed to the fixed platform 10 The movable platform 20 is located on a plane of different heights such that the flexible display screen 110 is naturally curved to form a circular arc-shaped curved surface. And, by adjusting the fixed platform 10 in the second direction Y, the height difference between the fixed platform 10 and the moving platform 20 can be changed, thereby changing the curvature of the curved surface to achieve the test. The curvature is specified and can meet the different testing needs of different types of flexible display screens 110. Further, by moving the moving platform 20 in the first direction X, the distance between the two ends of the flexible display screen 110 can be constantly changed, so that the position of the curved surface can be changed continuously, so that Each position of the flexible display screen 110 can be bent, and the cyclic bending of the flexible display screen 110 is realized, thereby testing the cyclic bending life of the flexible display screen 110.

The above disclosure is only a preferred embodiment of the present invention, and of course, the scope of the present invention is not limited thereto, and those skilled in the art can understand all or part of the process of implementing the above embodiments, and according to the present invention. The equivalent changes required are still within the scope of the invention.

Claims

A flexible display cycle bending life testing device, comprising: a fixed platform and a moving platform disposed in parallel with the fixed platform, wherein the fixed platform and the moving platform have a height difference; The fixed platform can be moved and the direction of the movement is vertical to adjust the height difference between the fixed platform and the moving platform, the fixed platform is parallel to the plane of the moving platform; The movable platform is respectively configured to fix opposite ends of the flexible display screen and the flexible display screen is in a curved state, and adjust the bending of the flexible display screen by adjusting a height difference between the fixed platform and the moving platform Curvature, moving the moving platform to adjust a bending position of the flexible display screen.
The flexible display cycle bending life testing device according to claim 1, wherein the plurality of fixed platforms are perpendicular to the moving direction of the fixed platform and the moving direction of the moving platform. Direction interval setting.
The flexible display cycle bending life testing device according to claim 1 or 2, wherein the flexible display cycle bending life testing device further comprises a moving platform driving portion; the moving platform driving portion comprises a sliding rail and a driving The sliding rail extends along the moving direction of the moving platform, and the moving platform is connected to the sliding rail through a slider, the driving member is connected with the moving platform, and drives the moving platform along the The slide rails are slid.
The flexible display cycle bending life testing device according to claim 3, wherein the driving member comprises a screw rod parallel to the sliding rail and an electric motor connected to one end of the screw rod, the moving platform and The screw rods are connected.
A flexible display cycle bending life testing apparatus according to claim 3, wherein said driving member comprises a pneumatic guide parallel to said slide rail, said movable platform being coupled to said pneumatic guide.
The flexible display cycle bending life testing device according to claim 1 or 2, wherein the flexible display cycle bending life testing device further comprises a fixed platform driving portion, the fixed platform driving portion comprising a guide rail and an adjusting member The guide rail extends along the moving direction of the fixed platform, the fixed platform is connected to the guide rail through a slider, the adjusting member is connected with the fixed platform, and the fixed platform is driven along the guide rail mobile.
The flexible display cycle bending life testing device according to claim 6, wherein the adjusting member comprises a screw rod disposed in parallel with the guide rail, and the fixing platform is connected to the screw rod.
The flexible display cycle bending life testing device according to claim 6 or 7, wherein the fixed platform driving portion further comprises a locking member, and the fixing platform is disposed on the guide rail by the locking member The lock is fixed.
The flexible display cycle bending life testing device according to claim 1, wherein the fixed platform is provided with a detachable pressing plate, and the pressing plate is used for pressing and fixing one end of the flexible display screen to the Described on the platform; the movable platform is provided with a detachable bead, and the bead presses the other end of the flexible display screen to the movable platform.
The flexible display cycle bending life testing device according to claim 9, wherein one end of the pressing plate is detachably fixed to the fixed platform, and the other end protrudes from the fixed platform; The portion of the platform corresponds to a portion of the moving platform, and the flexible display screen is located between the clamping plate and the moving platform.
The flexible display cycle bending life testing device according to any one of claims 1 to 10, wherein one side of the fixed platform is provided with a scale extending along the moving direction of the fixed platform for testing the The coverage between the fixed platform and the moving platform is poor.
A flexible display cycle bending life test method, characterized in that the method comprises the steps of:

Providing a flexible display cycle bending life testing device, and fixing one end of the flexible display to be tested to a fixed platform of the flexible display cycle bending life testing device;

After bending the flexible display screen to be tested, the other end thereof is fixed on the moving platform of the flexible display screen cyclic bending life testing device, and the curved portion of the flexible display screen is curved to form a circular arc surface;

Adjusting a height difference between the fixed platform and the moving platform to a preset value;

The moving platform is reciprocated to change the bending position of the flexible display screen.