CN210465159U

CN210465159U - Bending equipment

Info

Publication number: CN210465159U
Application number: CN201921077767.9U
Authority: CN
Inventors: 何远超; 刘耀阳; 顾骏; 徐健
Original assignee: Shanghai Jingli Electronic Technology Co ltd
Current assignee: Shanghai Jingli Electronic Technology Co ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-05-05
Anticipated expiration: 2029-07-11

Abstract

The utility model relates to a test equipment field, in particular to test equipment for flexible display panel. The utility model provides a bending device, which comprises a base; the rotating assembly comprises a rotating plate, a rotating shaft, a first motor, a connecting plate and a two-dimensional adjusting frame; the translation assembly comprises a translation plate, a second motor, a third motor and a connecting piece; and the motion control assembly is used for controlling the synchronous motion of the first motor, the second motor and the third motor. The utility model provides an equipment of buckling can realize buckling to flexible display panel, and the minimum radius of buckling of the test of buckling is continuous, and can not produce extra tensile stress or compressive stress to flexible display panel.

Description

Bending equipment

Technical Field

The utility model relates to a test equipment field, in particular to test equipment for flexible display panel.

Background

Organic Light Emitting Diode (OLED) display is a new technology applied in the field of flat panel display, and has many advantages of self-luminescence, simple structure, wide viewing angle, wide color gamut, high contrast, low power consumption, fast response, etc., and thus has been rapidly developed and successfully produced in mass in recent years. Under the premise that a curved screen is realized, the OLED display panel also has the potential characteristics of being further foldable and even rollable, and is favored by the terminal market.

At present, the flexible OLED display panel is mainly applied to a terminal in two schemes, one is to bend the flexible display screen inwards, and the screen is placed on the inner side of a machine body in a folded state; the other is to bend the flexible display screen outwards, and the screen is arranged outside the machine body in a folded state. Therefore, for a flexible display panel, an In-folding (In-folding) and an Out-folding (Out-folding) are two most common application scenarios, and the technical difficulty, the mass production difficulty, the minimum bending radius, the screen abrasion, the use experience, and even various mechanical and optical properties after bending In the two application scenarios have advantages and disadvantages. However, in any application scenario, reliability is a key performance index: the flexible display panel is prepared into a ten-million-level thin film transistor integrated circuit and a corresponding light emitting device array on a micron-level flexible thin film through various process flows, and the mechanical, electrical and optical properties of the flexible display panel still need to be kept above a certain level after being repeatedly folded for more than one hundred thousand times. In the reliability test process, a bending device is usually used to bend the flexible display panel for a certain number of times according to a certain minimum bending radius.

In the bending device, because the two ends of the flexible display panel are fixed on the bending device, if the bending device generates extra tensile stress or compressive stress on the flexible display panel in the bending process, the accuracy of the test can be influenced, so that the adjustment of the related process is influenced. Therefore, the two ends of the flexible display panel can only be subjected to bending test along a certain path, otherwise, additional tensile stress or compressive stress is generated. In addition, in the existing bending equipment, a specific component needs to be replaced when the minimum bending radius is changed, and the minimum bending radius can only be selected from a limited number of values and cannot be continuously changed, so that the bending test is limited.

Disclosure of Invention

The utility model provides a bending device, which comprises a base;

the rotating assembly comprises a rotating plate, a rotating shaft, a first motor, a connecting plate and a two-dimensional adjusting frame, the two-dimensional adjusting frame is located between the rotating plate and the connecting plate, the first motor drives the rotating plate, the two-dimensional adjusting frame and the connecting plate to rotate along the rotating shaft, and the two-dimensional adjusting frame adjusts the relative positions of the rotating plate and the connecting plate;

the translation assembly comprises a translation plate, a second motor, a third motor and a connecting piece, the second motor drives the connecting piece to drive the translation plate to move in a direction which is horizontal to the translation plate and vertical to the rotating shaft, and the third motor drives the translation plate, the connecting piece and the second motor to move in a direction which is vertical to the translation plate;

and the motion control assembly is used for controlling the synchronous motion of the first motor, the second motor and the third motor.

Optionally, the upper surface of the translational plate is fixedly connected with the lower surface of one end of the flexible display panel, and the upper surface of the rotational plate is fixedly connected with the lower surface of the other end of the flexible display panel.

Optionally, the rotation plate has a rotation range of 0 to 180 degrees.

Optionally, the translational plate further comprises a plurality of screw holes, and the rotational plate further comprises a plurality of in-line screw holes.

Optionally, the bending apparatus further comprises two or more detachable fixing strips, the fixing strips being fixed to the translational plate and the rotary plate through screw holes in the translational plate and in-line screw holes in the rotary plate.

Optionally, the bending device further comprises two detachable sheets, the sheets are mounted above the flexible display panel, and the edges of the sheets coincide with the edges of the translation plate and the rotation plate.

Optionally, the rotation plate has a rotation range of 0 to 360 degrees.

Optionally, porous ceramics are arranged on the translation plate and the rotation plate, and the porous ceramics are connected with negative pressure equipment to perform vacuum adsorption on the flexible display panel.

Optionally, the motion control component is a motion control card.

The utility model provides an equipment of buckling can realize buckling to flexible display panel, and the minimum radius of buckling of the test of buckling is continuous, and can not produce extra tensile stress or compressive stress to flexible display panel. In addition, the flexible display panel is more convenient to switch between the inward folding and the outward folding.

Drawings

Fig. 1 is a schematic view illustrating a bending effect of a flexible display panel.

Fig. 2 is a schematic diagram of the bending apparatus provided by the present invention.

Fig. 3 is a structural diagram of a bending apparatus according to a first embodiment of the present invention.

Fig. 4 is a schematic view illustrating the inward folding and outward folding of the bending apparatus according to the first embodiment of the present invention.

Fig. 5 is a structural diagram of a bending apparatus according to a second embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the invention.

In addition, the size of each structure may be enlarged or reduced in order to facilitate explanation in the drawings. For example, the size, thickness, and pitch of the structures shown in the drawings are arbitrarily illustrated for convenience of description, and thus the present invention is not necessarily limited to the illustration.

Referring to fig. 1, fig. 1 is a schematic view illustrating a bending effect of a flexible display panel. In the prior art, the bending apparatus includes a fixed plate 101 and a rotating plate 103. Fig. 1 (a) illustrates a flexible display panel folded inward, in which one side of the fixed end 105a of the flexible display panel is fixed to the upper surface 101a of the fixed plate 101, and the other side of the fixed end 105b is fixed to one side surface 103a of the rotating plate 103, i.e., the upper surface (i.e., the lower surface) of the rotating plate 103 before bending; when the rotation plate 103 rotates, the free section 105c of the flexible display panel between the one fixed end 105a and the other fixed end 105b is bent inward accordingly. Similarly, fig. 1 (b) illustrates the flexible display panel folded outward, in which one side of the fixed end 105a of the flexible display panel is fixed to the upper surface 101a of the fixed plate 101, and the other side of the fixed end 105b is fixed to one side surface 103a of the rotating plate 103, i.e., the upper surface of the rotating plate 103 before being bent (i.e., the lower surface after being bent); when the rotation plate 103 rotates, the free section 105c of the flexible display panel between the one fixed end 105a and the other fixed end 105b is bent outward accordingly. Considering the stress condition of the flexible display panel, when the free section 105c is a circular arc and the one side fixed end 105a and the other side fixed end 105b are tangent to the free section 105c, the fixed plate 101 and the rotating plate 103 of the bending apparatus do not generate additional tensile stress or compressive stress on the free section 105 c. In contrast, when the shape of the free section 105c of the flexible display panel is not a circular arc (such as the first curve 107 or the second curve 109), the fixed plate 101 and the rotating plate 103 may generate additional tensile stress or compressive stress on the free section 105c, which may affect the accuracy of the bending test result. Therefore, referring to fig. 1 (c), no matter which stage of the bending process, the free section 105c should be a circular arc, which is tangent to the fixed plate 101 and the rotating plate 103 at the connection position of the fixed plate 101 and the rotating plate 103.

In order to ensure that the free section 105c of the flexible display panel is not subjected to the additional tensile stress or compressive stress of the fixing plate 101 and the rotating plate 103 in the whole bending process, please refer to fig. 2, and fig. 2 is a schematic diagram of the bending apparatus provided by the present invention. The series of solid curves are schematic diagrams of a plurality of stages of the free section 205c of the flexible display panel during the bending process, the first dotted curve 207 is a movement track of the intersection of the rotating plate 203 and the free section 205c during the bending process, and the second dotted curve 209 is a movement track of the intersection of the translational plate 201 and the free section 205c during the bending process. The cross section of the free segment 205c is a straight line (i.e., an arc with infinite radius of curvature) in the initial state of the bending process, and the radius of curvature of the arc gradually decreases to the minimum bending radius of curvature when the arc is gradually bent. During the bending process, the rotating plate 203 rotates along the first imaginary curve 207 with the origin as the center of the circle in fig. 2; at the same time, translation plate 201 translates along second dashed curve 209. Hereinafter, for convenience of description, the first direction is defined as a direction perpendicular to both the normal direction of the translation plate and the rotation axis, the second direction is defined as a direction normal to the translation plate, and the translation plate 201 translates in the first direction and the second direction.

Example one

Please refer to fig. 3, which is a structural diagram of a bending apparatus according to an embodiment of the present invention. As shown in fig. 3, the bending apparatus 300 includes a translation plate 301, a rotation plate 303, and a base 305. The rotating plate 303 is rotatable about a rotation axis 317 by a first motor 315 via a first connecting plate 321 and a second connecting plate 322, the rotation range being 0 to 180 degrees. On the basis, the relative position between the first connecting plate 321 and the rotating plate 303 can be adjusted by manually fine-tuning the first two-dimensional adjusting rack 319, wherein adjusting the first knob 319a of the first two-dimensional adjusting rack 319 can change the relative position of the first connecting plate 321 and the rotating plate 303 along the connecting line of the two, and adjusting the second knob 319b of the first two-dimensional adjusting rack 319 can change the relative position of the first connecting plate 321 and the rotating plate 303 along the direction perpendicular to the rotating plate 303; accordingly, adjusting the third knob 320a of the second two-dimensional adjustment frame 320 may change the relative position of the second connection plate 322 and the rotation plate 303 along the direction of the line connecting the two, and adjusting the fourth knob 320b of the second two-dimensional adjustment frame 320 may change the relative position of the second connection plate 322 and the rotation plate 303 along the direction perpendicular to the rotation plate 303. The translation plate 301 is driven by a second motor 307 via a link to translate in a first direction on a first rail 309 and a second rail 310. The translation plate 301, the second motor 307, the first rail 309, the second rail 310, and the link are driven by a third motor 311, and translate in the second direction on a third rail 313 and a fourth rail 314. When performing the fold-in test of the flexible display panel (not shown), both ends of the flexible display panel are fixed to the translational plate 301 and the rotational plate 303, the translational plate 301 is driven by the second motor 307 and the third motor 311 to translate along the first direction and the second direction, and the rotational plate 303 is driven by the first motor 315 to rotate.

Please refer to fig. 3 and fig. 4 synchronously, and fig. 4 is a schematic diagram illustrating the inward folding and outward folding switching of the bending apparatus according to an embodiment of the present invention. When performing the fold-out test of the flexible display panel 405, the flat moving plate 301 and the rotating plate 303 are first adjusted to be on the same plane, and then the flexible display panel 405 is fixed on the flat moving plate 301 and the rotating plate 303 by means of, but not limited to, tape fixing and glue fixing. Then, the first fixing bar 407 is fixed on the translational plate 301 through the first screw hole 409 and the second screw hole 410, and is fixed on the rotational plate 303 through the first straight screw hole 413 and the second straight screw hole 414; the second fixing bar 408 is fixed to the translation plate 301 through a third screw hole 411 and a fourth screw hole 412, and is fixed to the rotation plate 303 through a third screw hole 415 and a fourth screw hole 416. When the designated minimum bend radius is changed, the length of the free segment 405c should be changed in synchronization, and the horizontal pitch of the translation and

rotation plates

301 and 303 before bending is the same as the length of the free segment 405c in order to ensure that the free segment 405c before bending is in an unstressed state. After the horizontal distance between the translational plate 301 and the rotational plate 303 is adjusted, the first and second horizontal screw holes 413, 414 of the first fixing bar 407 and the third and fourth horizontal screw holes 415, 416 of the second fixing bar 408 can be adapted to different distances. The flat moving plate 301, the rotating plate 303, the flexible display panel 405, the first fixing bar 407, and the second fixing bar 408 are flipped together and then re-mounted on the base 305. At this time, the flexible display panel 405 is positioned under the panning plate 301 and the rotation plate 303, and after the first fixing bar 407 and the second fixing bar 408 are removed, the panning plate 301 is driven by the second motor 307 and the third motor 311 to be translated in the first direction and the second direction, and the rotation plate 303 is driven by the first motor 315 to be rotated, so that the folding-out test of the flexible display panel 405 can be performed.

Referring to fig. 4, the bending apparatus further includes two detachable sheets, a first sheet 417 is installed above the flexible display panel 405 through a fifth screw hole 419 and a sixth screw hole 420 on the translational plate 301, and a second sheet 418 is installed above the flexible display panel 405 through a seventh screw hole 421 and an eighth screw hole 422 on the rotational plate 303; the edges of the first sheet 417 and the second sheet 418 are overlapped with the edges of the panning plate 301 and the rotation plate 303 respectively, so that two sides of the free section 405c of the flexible display panel 405 are fixed on the panning plate 301 and the rotation plate 303, the flexible display panel 405, the panning plate 301 and the rotation plate 303 are not fixed partially, gaps exist partially, and the accuracy of a bending test is ensured.

The embodiment of the utility model provides an equipment of buckling can realize buckling to flexible display panel, and the minimum radius of buckling of the test of buckling is continuous, and can not produce extra tensile stress or compressive stress to flexible display panel. The switching between the inward folding test and the outward folding test can be conveniently realized through the common overturning of the translation plate, the rotation plate and the flexible display panel.

Example two

Please refer to fig. 5, which is a structural diagram of a bending apparatus according to a second embodiment of the present invention, the bending apparatus is also used for performing a bending test on a flexible display panel. As shown in fig. 5, the bending apparatus 500 includes a translation plate 501, a rotation plate 503, and a base 505. The flat moving plate 501 and the rotating plate 503 are each provided with a porous ceramic region, and a flexible display panel (not shown) is fixed by vacuum suction. The rotation plate 503 is driven by the first motor 515 via the first link plate 521 and the second link plate 522 to rotate about the rotation shaft 517 and the rotation shaft 518 (the rotation shaft 517 and the rotation shaft 518 are located on the same line), which is in a range of 0 degrees to 360 degrees. On the basis, the relative position between the first connecting plate 521 and the rotating plate 503 can be adjusted by finely adjusting the first two-dimensional adjusting bracket 519, and the relative position between the second connecting plate 522 and the rotating plate 503 can be adjusted by finely adjusting the second two-dimensional adjusting bracket 520. The translation plate 501 is driven by a second motor 507 via a link and is translated in a first direction on a first rail 509 and a second rail 510. The translation plate 501, the second motor 507, the first rail 509, the second rail 510, and the link may be driven by a third motor 511 to translate in the second direction on the third rail 513 and the fourth rail 514. When a bending test of a flexible display panel (not shown) is performed, both ends of the flexible display panel are fixed to the translational plate 501 and the rotational plate 503, the translational plate 501 is driven by the second motor 507 and the third motor 511 to translate in the first direction and the second direction, and the rotational plate 503 is driven by the first motor 515 to rotate. When the first motor 515 drives the rotating plate 503 to move above the translational plate 501, the rotating plate is folded inwards; accordingly, the first motor 515 is folded outward when it drives the rotation plate 503 to move under the translational plate 501.

The embodiment of the utility model provides a second equipment of buckling can realize buckling to flexible display panel, and the minimum radius of buckling of the test of buckling is continuous, and can not produce extra tensile stress or compressive stress to flexible display panel. Because the rotating plate can rotate between 0 degree and 360 degrees, the switching between the inward folding test and the outward folding test can be realized without structural adjustment. In addition, vacuum adsorption can be adopted to fix the flexible display panel, and the feeding and discharging are more convenient.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims. It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A bending device is characterized by comprising a base,

the translation assembly comprises a translation plate, a second motor, a third motor and a connecting piece, the second motor drives the connecting piece to drive the translation plate to move in a first direction, the first direction is perpendicular to the normal direction of the translation plate and the direction of a rotating shaft, the third motor drives the translation plate, the connecting piece and the second motor to move in a second direction, and the second direction is the normal direction of the translation plate;

2. The bending apparatus according to claim 1, wherein an upper surface of the translation plate is fixedly connected to a lower surface of one end of the flexible display panel, and an upper surface of the rotation plate is fixedly connected to a lower surface of the other end of the flexible display panel.

3. The bending apparatus of claim 1, wherein the rotation plate has a range of rotation from 0 degrees to 180 degrees.

4. The bending apparatus according to claim 3, wherein the translational plate further comprises a plurality of threaded holes and the rotational plate further comprises a plurality of in-line threaded holes.

5. The bending apparatus according to claim 4, further comprising two or more removable retaining strips secured to the translation plate and the rotation plate by threaded holes in the translation plate and slotted holes in the rotation plate.

6. The bending apparatus according to claim 3, further comprising two detachable sheets mounted over the flexible display panel, wherein edges of the sheets coincide with edges of the pan plate and the swivel plate.

7. The bending apparatus of claim 1, wherein the rotation plate has a range of rotation from 0 degrees to 360 degrees.

8. The bending apparatus according to claim 7, wherein porous ceramics are disposed on the translation plate and the rotation plate, and the porous ceramics are connected to a negative pressure apparatus for vacuum-absorbing the flexible display panel.

9. The bending apparatus according to claim 1, wherein the motion control assembly is a motion control card.