KR20160000926A - The circulation bending test device for flexible display - Google Patents

Abstract

The present invention relates to a rotating and bending test device for a flexible display and, more specifically, relates to a rotating and bending test device for a flexible board measuring a mechanical deformation due to bending by repeatedly applying a rotating and bending stress to the flexible display. The present invention provides the rotating and bending test device for the flexible display characterized by comprising: a base plate; a fixated supporter mounted on one side of the base plate; a movable supporter mounted on an other side of the base plate corresponding to the fixated supporter; a first vertical guide rail installed inside the fixated supporter; a second vertical guide rail installed inside the movable supporter corresponding to the first vertical guide rail; a first vertical guide installed in the first vertical guide rail; a second vertical guide installed in the second vertical guide rail; a lower electrode unit joined to each of the first and second vertical guide rails, moving in a vertical direction; a first rotary supporter mounted on a top of the fixated supporter; a second rotary supporter mounted on the top of the movable supporter corresponding to the first rotary supporter; an upper electrode unit rotating while being pivotally supported by the first and second rotary supporters; and a motor mounted in the fixated supporter, connected to the upper electrode unit, and rotating the upper electrode unit.

Description

[0001] The present invention relates to a flexible bending test device for a flexible display,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating bending test apparatus for a flexible display, and more particularly, to a rotating bending test apparatus for a flexible substrate for measuring mechanical deformation according to bending by applying repetitive rotational bending stress to the flexible display.

Flexible displays, which have been developed with a lot of research in recent years, are displays in which flexible substrates are easily folded and unfolded by replacing a glass substrate surrounding a liquid crystal with a plastic film in a liquid crystal display or an organic EL display. Flexible display is advantageous in that it can be manufactured in various forms because it is light and shock-resistant as well as bent or bent because the substrate is replaced with plastic.

The flexible display typically comprises a flexible substrate, a transparent electrode formed thereon, and a display material. The flexible substrate is made of polyethylene terephthalate (PET), polycarbonate (PC), polyolefin, polyethersulfone (PES) or the like. The transparent electrode is generally formed of a thin film such as indium-tin- . Since the flexible display may display image information not only in the unfolded state but also in the folded state or the dried state, it is required to secure the reliability of the flexible display even in the deformed state.

A bending apparatus for a flexible display according to the related art is disclosed in Patent Application No. 10-2010-0033801. The bending test apparatus includes a first and a second electrodes, which are horizontally disposed to load the flexible element in a horizontal direction, Wherein the first electrode portion is movable in the horizontal direction and the second electrode portion is fixed so that the first electrode portion is horizontally moved toward the second electrode portion so that the mechanical stress in the horizontal direction is applied to the flexible element A bending device is proposed.

In addition, the patent application No. 10-2011-0045251 relates to a bending test apparatus for a flexible substrate, which comprises a table, a first electrode portion for fixing one side of the flexible substrate on the table, A slider that moves along the guide rail, and a second electrode that is connected to the slider and that extends the other side of the flexible substrate toward or away from the first electrode unit, And a bending device embodying the invention.

In addition, the patent application No. 10-2012-0033943 relates to an apparatus and method for bending a flexible substrate and a flexible display device, wherein when the flexible substrate is subjected to a bending test operation, the second electrode portion is moved to bend the flexible substrate, And the second electrode unit rotation motor rotates the second electrode unit around the rotation shaft to wind or unwind the flexible substrate on the outer circumferential surface of the second electrode unit.

The above techniques have a problem in that it is difficult to judge mechanical deformation due to repetitive bending in the entire area of the flexible display although there is a point that a bending device for securing the reliability according to the mechanical deformation of the flexible display is presented.

Further, there is a problem that the size of the flexible display to be tested is limited.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotating bending test apparatus for a flexible display capable of grasping mechanical deformation by a repeated stress load in the entire area.

It is another object of the present invention to provide a rotary bending test apparatus for a flexible display which can be adjusted according to the size of a flexible display.

In order to achieve the above object, the present invention provides a base plate, A fixed support mounted on one side of the base plate; A movable support mounted on the other side of the base plate to correspond to the fixed support; A first up and down guide rail installed inside the fixed support; A second up-and-down guide rail installed on the inner side of the movable support so as to correspond to the first up-and-down guide rail; A first up / down guide installed on the first up / down guide rail; A second up / down guide installed on the second up / down guide rail; A lower electrode unit coupled to the first and second upper and lower guides and moving up and down; A first rotation support mounted on an upper end of the fixed support; A second rotation support mounted on an upper end of the movement support so as to correspond to the first rotation support; An upper electrode rotatably supported by the first rotation support and the second rotation support while rotating; And a motor mounted on the fixed support and connected to the upper electrode to rotate the upper electrode unit.

The present invention may further include a length adjusting rail mounted on the base plate and adjusting a distance between the fixed support and the movable support by regulating the back and forth movement of the movable support. The movable support can be moved constantly along the length-adjusting rail, thereby enabling precise movement.

The upper electrode part of the present invention is constituted by a shaft, the shaft is divided into two parts in the longitudinal direction, and the divided part of the shaft can be fastened with the fastening member. The flexible display is mounted on the shaft. After it is fixed, the flexible display is wound on the shaft according to the rotation of the shaft and then stretched.

In the present invention, a horizontal guide mounted on a side of the movement support and the fixed support, a horizontal guide connected to the movement support and moving back and forth along the horizontal guide rod, and a fixing member for fixing the horizontal guide to the horizontal guide rod. It can be additionally mounted. The movable support is connected to the horizontal guide, and the horizontal guide can be fixed at a suitable position as the horizontal guide moves along the horizontal guide rod. Therefore, the distance between the movable support and the fixed support can be precisely controlled according to the size of the flexible display.

The fixing portion of the present invention may be constituted by a bolt having a handle formed on the head. By forming the fixing portion with a bolt, there is an advantage that the horizontal guide can be easily fixed to the horizontal guide bar.

In the present invention, a plurality of foot plates may be formed at the lower end of the base plate. Rubber, polyurethane, silicone or the like, which is easy to absorb vibration, may be used as the foot plate. By forming the foot plate on the base plate, there is an advantage that the vibration or the like generated while driving the bending device can be absorbed.

The present invention has an advantage in that it is possible to grasp whether mechanical deformation is caused by cyclic stress load in the entire flexible display by rotating the flexible display,

It is possible to grasp the mechanical deformation of the entire area due to repetitive bending or the like, thereby ensuring reliability of the test result.

1 is a perspective view of a rotating bending test apparatus according to the present invention;
2 is a side view of a rotating bending test apparatus according to the present invention;
3 is a plan view of a rotating bending test apparatus according to the present invention.
4A is a perspective view showing a state in which a flexible display is opened in a rotary bending test apparatus according to the present invention.
FIG. 4B is a perspective view of a rotating bending test apparatus according to the present invention, in which the flexible display is wound as the motor is driven. FIG.

Hereinafter, embodiments of the present invention in which the above objects can be specifically realized will be described in detail with reference to the accompanying drawings. In the description of the embodiments, the same names and symbols are used for the same components, and further description thereof will be omitted.

FIG. 1 is a perspective view of a rotary bending test apparatus according to the present invention, FIG. 2 is a side view of a rotary bending test apparatus according to the present invention, FIG. 3 is a plan view of a rotary bending test apparatus according to the present invention, FIG. 4B is a perspective view of a rotating bending test apparatus according to the present invention, in which the flexible display is wound as the motor is driven. FIG. 4B is a perspective view of the rotary bending test apparatus according to the present invention.

The bending test apparatus according to the present invention will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 is a perspective view of a rotary bending test apparatus of a flexible display according to the present invention, FIG. 2 is a side view of the rotary bending test apparatus of FIG. 1, and FIG. 3 is a plan view of the rotary bending test apparatus of FIG. As shown in the drawing, the apparatus for testing rotational bending of a flexible display according to the present invention includes a base plate 10, a fixed support 20 and a movable support 30 mounted on the base plate 10, A foot plate (15) is provided on the bottom surface of the plate (10). The footrest 15 may be made of rubber, flexible polyurethane, silicone, or the like. Since the footrest 15 is provided, there is an advantage that vibration and noise can be prevented.

The fixed support 20 is mounted at a predetermined height on one side of the base plate 10. The fixed support 20 has a first up-and-down guide rail 21 having a predetermined height on the inner side. At the upper end of the fixed support 20, a fixed rotation support 22 for fixing the upper electrode 40 is provided. A shaft (41), which is an upper electrode unit (40), is inserted and fixed to the fixed rotation support base (22).

The movable support 30 is mounted at a position symmetrical with the other fixed support 20 of the base plate 10. [ And is provided on the other side of the base plate 10 to guide up and down movement of the lower electrode unit 50 together with the fixed support 20. Specifically, the movable support 30 is provided with a second upper and lower guide rails 31 having a predetermined height. The second upper and lower guide rails 31 guide the lower electrode unit 50 to move up and down together with the first upper and lower guide rails 21. On the upper portion of the movable support 20, a movable rotary support 32 is provided. The movable rotary support 32 is provided to enable the shaft 41 of the upper electrode unit 40 to be fixedly mounted and rotated. The shaft 41 is fixedly rotated together with the fixed rotation support 22 so that the upper electrode unit 40 can be rotated. A length adjusting rail 11 is provided on the bottom surface of the movable support 30. The length adjusting rail 11 is provided for adjusting the distance between the fixed support 20 and the movable support 30 so that the movable support 30 moves along the length adjusting rail 11 to the fixed support 20 Thereby adjusting the interval. The pair of length-adjusting rails 11 are provided to serve as guide rails of the movable support rods at the lower ends of the movable rods 30. The length-adjusting rail 11 is mounted on the upper surface of the base plate 10. A horizontal guide rod 12 for guiding the left and right movement of the movement support 30 is provided on the side of the movement support 30. The movement support 30 includes a horizontal guide 16 connected to the movement support, And moves back and forth together with the movement support 30 as it moves left and right along the guide 12. A fixing part 13 for fixing the movement of the horizontal guide 16 is provided on the upper part of the horizontal guide 16 moving along the horizontal guide bar 12. The fixing part 13 of the fixing part has a handle, The movement of the movable support 30 can be fixed by the fixing part 13 pressing the upper part of the horizontal guide rod 12. [ The horizontal guide rod 12 is provided with a pedestal 14 for supporting and holding both ends thereof.

The upper electrode portion 40 supported by the movable rotary support 32 and the fixed rotary support 22 includes a shaft 41, bearing supports 46 and 47 for supporting the shaft 41 from both sides, And a motor 45 for rotating the shaft 41 from the rear of the support table 22. A reduction gear 44 may further be provided at the front of the motor. The shaft 41 may be provided so as to be bisected. Holes can be formed in the bisected shaft and fixed using bolts and nuts 43. The flexible display P can be fixedly mounted in the gap 42 between the bisecting shafts.

Both sides of the lower electrode part 50 are mounted on the first upper and lower guide rails 21 and the second upper and lower guide rails 31 to move up and down along the guide rails 21 and 31. The lower electrode unit 50 includes a lower electrode bar 51 to which the flexible display P is fixed and a pair of upper and lower guides 52 and 53 mounted on both sides of the lower electrode bar 51. The upper and lower guides 52 and 53 are mounted on the first upper and lower guide rails 21 and the other is mounted on the second upper and lower guide rails 31 to move up and down along the guide rails. 51 may be provided with a weight (not shown) for the lower movement of the lower electrode bar 51 due to its own weight. A flexible display P is also mounted on the lower electrode bar 51 and the upper portion of the flexible display P is fixed to the shaft 41 which is the upper electrode part.

A foot plate (15) is provided on the bottom surface of the base plate (10). The footrest 15 may be made of a soft material. Rubber, flexible polyurethane, silicone, or the like. Since the footrest 15 is made of a soft material, vibration and the like can be prevented.

4A and 4B, a specific operation of the rotating bending test apparatus according to the present invention will be described.

4A and 4B, one side of the flexible display P is fixed to the upper electrode unit 40, and the other side of the flexible display P is fixed to the lower electrode unit 50. As shown in FIG. One side of the flexible display P is mounted on the shaft 41 of the upper electrode unit 40 and the other side of the flexible display P is mounted on the lower electrode bar 51. As the shaft 41 rotates, The display P is wound on the shaft 41. [ The driving of the motor is stopped when the flexible display is wound on the shaft 41. When the driving of the motor is stopped, the lower electrode bar 51 is lowered by the self-load of the lower electrode bar 51, The flexible display is expanded while the shaft 41 rotates in the opposite direction. When the shaft 41 is not easily rotated due to a small load of the lower electrode bar 51, the weight may be hung on the lower electrode bar 51 to facilitate rotation. This process can be repeated to check whether the flexible display is mechanically deformed by repeated bending.

When the size of the flexible display P is changed, for example, when the size of the flexible display P is smaller than the current size, the movable support 30 is first moved along the length adjusting rail 11 to the fixed support 20 side. When the movable support 30 is moved, the horizontal guide 16 connected to the movable support 30 moves along the horizontal guide rod 12. The movement of the horizontal guide is restricted while pressing the horizontal guide rod 12 by turning the fixing part 13 of the horizontal guide. Therefore, the movable support 30 is fixed. When the movable support 30 is moved, the shaft 41 is also moved together. In order to move the shaft 41, the bearing support 47 is loosened to allow the shaft to move, and the lower electrode bar 51 It is resized together. In order to adjust the size of the lower electrode part 51, the upper and lower guides 53 and 53, which move up and down along the second upper and lower guide rails 31, of the upper and lower guides 52 and 53 mounted on the lower electrode bar 51, And the lower electrode bar 51 is fixedly mounted. Accordingly, the widths of the upper electrode portion and the lower electrode portion are reduced and adjusted to the size of the flexible display.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It is to be understood that the techniques which can be used by those skilled in the art are included in the technical scope of the present invention.

10: base plate 11: length adjusting rail
12: horizontal guide rod 13:
14: horizontal guide rod base 15: foot plate
16: Horizontal guide
20: a fixed support 21: a first up-and-down guide rail
22: Fixed rotary support
30: a movable support 31: a second up and down guide rail
32: Moving rotary support
40: upper electrode part 41: shaft
42: clearance 43: fastening member
44: Reduction gear 45: Motor
50: lower electrode part 51: lower electrode bar
52, 53: Up and down guide

Claims (6)

A base plate;
A fixed support mounted on one side of the base plate;
A movable support mounted on the other side of the base plate to correspond to the fixed support;
A first up and down guide rail installed inside the fixed support;
A second up-and-down guide rail installed on the inner side of the movable support so as to correspond to the first up-and-down guide rail;
A first up / down guide installed on the first up / down guide rail;
A second up / down guide installed on the second up / down guide rail;
A lower electrode unit coupled to the first and second upper and lower guides and moving up and down;
A first rotation support mounted on an upper end of the fixed support;
A second rotation support mounted on an upper end of the movement support so as to correspond to the first rotation support;
An upper electrode rotatably supported by the first rotation support and the second rotation support while rotating;
A motor mounted on the fixed support and connected to the upper electrode to rotate the upper electrode;
And a second bending test device for bending the flexible display.
The method according to claim 1,
Further comprising a length adjusting rail mounted on the base plate and adjusting the distance between the fixed support and the movable support by adjusting the back and forth movement of the movable support.
The method according to claim 1,
Wherein the upper electrode part comprises:
Wherein the shaft is divided into two parts in the longitudinal direction, and the divided part of the shaft is fastened with a fastening member.
The method according to claim 1,
A horizontal guide bar is mounted on the side of the movable support and the fixed support,
A horizontal guide connected to the movement support and moving back and forth along the horizontal guide bar, and a fixing part for fixing the horizontal guide to the horizontal guide bar.
5. The method of claim 4,
Wherein the fixing portion comprises a bolt having a handle formed on the head.
The method according to claim 1,
And a plurality of foot plates are formed on the lower end of the base plate.

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