CN113920875A

CN113920875A - Attaching jig

Info

Publication number: CN113920875A
Application number: CN202111210296.6A
Authority: CN
Inventors: 李飞; 冯彬峰; 许志财; 王佳祥; 崔志宏; 肖博文
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-01-11
Anticipated expiration: 2041-10-18
Also published as: CN113920875B

Abstract

The disclosure relates to a laminating tool belongs to and shows technical field. The laminating jig comprises an upper jig and a lower jig, wherein the upper jig is provided with a fixing part, the lower jig comprises a bearing table and a piezoelectric layer, the bearing table is provided with a supporting layer opposite to the fixing part, the supporting layer is used for attaching the flexible display panel and comprises a plane area and a curved surface area; the piezoelectric layer is filled in the bearing table and at least distributed in the area corresponding to the curved surface area, and the piezoelectric layer is used for applying an acting force towards the supporting layer when being electrified so as to promote the area of the supporting layer corresponding to the piezoelectric layer to deform. In this disclosure, because the piezoelectric layer distributes at least in the plummer with the region that the curved surface district corresponds, under the circumstances of piezoelectric layer circular telegram, can exert effort in order to make the supporting layer take place deformation through the curved surface district of piezoelectric layer at least to the supporting layer to form the effort that is used in flexible display panel, in order to guarantee the laminating effect between flexible display panel and the curved surface apron when last tool with lower tool pressfitting.

Description

Attaching jig

Technical Field

The utility model relates to a show technical field, particularly, relate to a laminating tool.

Background

In recent years, along with the development of display technology, electronic devices having curved screens are receiving market pursuits with high screen occupation ratio, excellent appearance and user experience. Wherein, the curved screen has straight district and bending zone. In the manufacturing process of the curved screen, due to the limitation of the manufacturing process, the display effect of the bending area of the electronic equipment is poor, and the display effect is further reduced.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of the present disclosure is to provide a laminating jig, which can ensure the bending area of the curved surface cover plate and the laminating effect of the flexible display panel when the curved surface cover plate is laminated with the flexible display panel.

According to an aspect of the present disclosure, there is provided a fitting jig including:

the upper jig is provided with a fixing part for fixing the curved surface cover plate;

the lower jig comprises a bearing table and a piezoelectric layer;

the bearing table is provided with a supporting layer opposite to the fixing part, the supporting layer is used for attaching the flexible display panel, and the supporting layer comprises a plane area and a curved surface area;

the piezoelectric layer is filled in the bearing table and at least distributed in the area corresponding to the curved surface area, and the piezoelectric layer is used for applying an acting force towards the supporting layer when being electrified so as to promote the deformation of the area of the supporting layer corresponding to the piezoelectric layer.

According to the attaching jig of one embodiment of the present disclosure, the bearing table includes a bearing body;

the supporting layer is attached to the surface of the bearing body, and the piezoelectric layer is located between the supporting layer and the bearing body or located in the supporting layer.

According to the attaching jig of one embodiment of the present disclosure, the supporting layer includes a first planar region, a first curved region and a second curved region;

the first curved surface area and the second curved surface area are positioned on the same side of the first planar area in the thickness direction, and the inner arc surface of the first curved surface area is opposite to the inner arc surface of the second curved surface area;

the first curved surface area and the second curved surface area are respectively connected with two opposite side edges of the plane where the first plane area is located;

the bending degree of the first curved surface area and the second curved surface area is less than or equal to 90 degrees.

According to the attaching jig of the embodiment of the present disclosure, the piezoelectric layer is uniformly distributed between the first curved surface region and the bearing body and between the second curved surface region and the bearing body.

According to an embodiment of the disclosure, the shore hardness of the material of the first curved surface region and the material of the second curved surface region are 40A, and the thicknesses of the first curved surface region and the second curved surface region are both greater than or equal to 5 mm and less than or equal to 15 mm.

According to the attaching jig of one embodiment of the present disclosure, the support layer includes a second planar region, a third planar region, a fourth planar region, a third curved region, and a fourth curved region;

the third planar region and the fourth planar region are located on the same side of the second planar region in the thickness direction, and the projections of the third planar region and the fourth planar region in the thickness direction are both located in the second planar region;

the third curved surface region is positioned between the second planar region and the third planar region, the fourth curved surface region is positioned between the second planar region and the fourth planar region, and the inner curved surface of the third curved surface region is opposite to the inner curved surface of the fourth curved surface region;

two straight side edges of the third curved surface area are respectively connected with the side edges of the second planar area and the third planar area which are positioned on the same side, and two straight side edges of the fourth curved surface area are respectively connected with the side edges of the second planar area and the fourth planar area which are positioned on the same side;

the bending degree of the third curved surface area and the fourth curved surface area is greater than or equal to 90 degrees and less than or equal to 180 degrees.

According to the attaching jig disclosed by the embodiment of the disclosure, the piezoelectric layers are distributed between the second planar area, the third planar area, the fourth planar area, the third curved area and the fourth curved area and the bearing body;

the second planar region, the third planar region, the fourth planar region, the third curved region and the fourth curved region are all capable of deforming under an external force applied by the piezoelectric layer.

According to this laminating tool of an embodiment of this disclosure, piezoelectric layer includes a plurality of piezoelectric unit, piezoelectric unit all distributes along the length direction of the bending axis of curved surface district.

According to the attaching jig of the embodiment of the present disclosure, a distance between two adjacent piezoelectric units in a length direction of a bending axis of the curved surface region is less than or equal to 3 mm.

According to this laminating tool of an embodiment, the laminating tool still includes:

a piezoelectric controller electrically connected to the piezoelectric layer;

and the lifting driving device is connected with at least one of the upper jig and the lower jig and is used for driving the upper jig and the lower jig to be pressed.

In the embodiment of the disclosure, tool and lower tool in the pressfitting to when realizing the laminating of flexible display panel and curved surface apron, under the circumstances of piezoelectric layer circular telegram, can exert the effort towards the supporting layer through the piezoelectric layer to the plummer, thereby make the supporting layer take place deformation, and then make flexible display panel be close to the curved surface apron, in order to guarantee the laminating effect between flexible display panel and the curved surface apron. Because the piezoelectric layer is at least distributed in the bearing table and in the area corresponding to the curved surface area, the bonding effect of the flexible display panel positioned in the curved surface area and the curved surface cover plate is at least ensured, and the phenomena of bonding bubbles and lamination separation between the flexible display panel and the curved surface cover plate are avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a schematic structural diagram of a flexible display panel and a curved cover plate provided in the related art after being attached to each other.

Fig. 2 is a schematic structural view of a bonding jig according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a lower fixture according to an embodiment of the disclosure.

Fig. 4 is a schematic structural diagram of an initial state of a curved cover plate and a flexible display panel in a press-fit manner according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural view of the lower fixture after the curved cover plate and the flexible display panel are laminated according to the embodiment of the disclosure.

Fig. 6 is a schematic structural diagram of a lower fixture for performing stress compensation according to an embodiment of the disclosure.

Fig. 7 is a schematic structural diagram of a state of a flexible display panel attachment method according to an embodiment of the present disclosure.

Fig. 8 is a schematic structural diagram of a lower jig according to an embodiment of the present disclosure.

Reference numerals:

10. mounting a jig; 20. a lower jig; 30. a piezoelectric controller; 40. a lift control device; 50. a curved cover plate; 60. a flexible display panel; 70. transferring the film; 80. a vacuum chuck;

21. a bearing table; 22. a piezoelectric layer;

211. a support layer; 212. a load-bearing body;

2111. a first planar zone; 2112. a second planar region; 2113. a third planar region; 2114. a fourth planar zone; 2115. a first curved surface region; 2116. a second curved surface region; 2117. a third curved surface region; 2118. a fourth curved surface region.

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 embodiments 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. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and are not limiting on the number of their objects.

In the related art, as shown in fig. 1, the curved screen includes a curved cover plate 50 and a flexible display panel 60, and the curved cover plate 50 and the flexible display panel 60 are attached by an attaching jig to obtain the curved screen. For the electronic equipment with the curved screen, the display effect of the bending area of part of the electronic equipment is found to be poor in the using process.

The curved cover plate 50 has a rigid and transparent curved structure. For example, the curved cover plate 50 is a glass cover plate, and the glass cover plate includes one straight area and two bending areas, or includes three straight areas and two bending areas, etc.

The flexible display panel 60 is a display panel for displaying a screen after power is turned on. The flexible Display panel 60 is an OLED (Organic electroluminescent Display) panel, and includes a substrate, a TFT (Thin Film Transistor) layer, an Organic light emitting Display layer, and an encapsulation layer, which are sequentially stacked, although the OLED panel may include other structural layers.

In order to improve the display effect of the electronic device, after experiments and analysis, the inventor finds that the display effect of the bending region is poor because bubbles are easily generated in the bending region when the curved cover plate 50 and the flexible display panel 60 are attached, and the attachment is not solid, as shown in fig. 1. Therefore, the embodiment of the present disclosure discloses a fitting jig to fit the curved surface cover plate 50 and the flexible display panel 60 through the fitting jig, so as to improve the fitting effect, avoid bubbles appearing in the bending area, and fit unrealistically, thereby improving the display effect of the electronic device.

The disclosed embodiment provides a fitting jig. As shown in fig. 2 and 3, the attaching jig includes an upper jig 10 and a lower jig 20, the upper jig 10 has a fixing portion for fixing the curved cover plate 50; the lower jig 20 includes a stage 21 and a piezoelectric layer 22.

The supporting layer 211 is opposite to the fixing portion, the supporting layer 211 is used for attaching the flexible display panel 60, and the supporting layer 211 includes a planar area and a curved area; the piezoelectric layer 22 is filled in the carrier 21 and distributed at least in the area corresponding to the curved surface area, and the piezoelectric layer 22 is used for applying a force towards the support layer 211 when being electrified so as to promote the deformation of the area of the support layer 211 corresponding to the piezoelectric layer 22.

The flexible display panel 60 attached to the planar area of the supporting layer is used for being correspondingly attached to the straight area of the curved cover plate 50, and the flexible display panel 60 attached to the curved area of the supporting layer is used for being correspondingly attached to the bent area of the curved cover plate 50. The structure of the upper jig 10 can refer to the related art.

The specific implementation mode is as follows: in the laminating process, the curved surface cover plate 50 is fixed on the fixing portion of the upper jig 10, the flexible display panel 60 is attached to the supporting layer 211 of the lower jig 20, after the flexible display panel 60 is aligned with the curved surface cover plate 50, the upper jig 10 and the lower jig 20 are driven to be pressed, so that the upper pressing and the lower pressing of the flexible display panel 60 and the curved surface cover plate 50 are realized, the piezoelectric layer 22 is controlled to be electrified after the upper pressing and the lower pressing are finished, the stress is supplemented at the position corresponding to the bending area of the curved surface cover plate 50 through the piezoelectric layer 22, so that the flexible display panel 60 is enabled to be deviated towards the curved surface cover plate 50, the laminating effect of the bending area of the curved surface cover plate 50 and the flexible display panel 60 is ensured, after the piezoelectric layer 22 is controlled to be electrified for a period, the whole laminating of the flexible display panel 60 and the curved surface cover plate 50 is finished.

In combination with the above bonding process, as can be seen from the comparison result of fig. 4 and 5 (the straight region of the curved cover plate 50 in fig. 4 initially contacts the flexible display panel 60, and the straight region of the curved cover plate 50 in fig. 5 is completely bonded to the flexible display panel 60), the straight region of the curved cover plate 50 is bonded to the corresponding flexible display panel 60 by the upper and lower bonding of the upper jig 10 and the lower jig 20; then, as can be seen from a comparison result between fig. 5 and fig. 6 (in fig. 5, the bending region of the curved cover 50 is not attached to the flexible display panel 60, and in fig. 6, the bending region of the curved cover 50 is attached to the flexible display panel 60 with the stress of the piezoelectric layer 22 supplemented), when the piezoelectric layer 22 is powered on, a force can be applied to the support layer 211 of the stage 21 by the piezoelectric layer 22 to cause the support layer 211 to deform, so as to cause the flexible display panel 60 to approach the curved cover 50, so as to ensure an attaching effect between the flexible display panel 60 and the curved cover 50. Because the piezoelectric layer 22 is at least distributed in the area corresponding to the curved surface area in the bearing table 21, the bonding effect of the flexible display panel 60 located in the curved surface area and the curved surface cover plate 50 is at least ensured, and the phenomena of bonding bubbles and lamination separation between the flexible display panel 60 and the bending area of the curved surface cover plate 50 are avoided.

After the curved cover plate 50 is fixed on the fixing portion of the upper jig 10 and the flexible display panel 60 is attached to the lower jig 20, the position information (image information) of the flexible display panel 60 can be acquired by the information acquisition device (camera), the image information can be converted into gray scale image information, and the coordinate information is determined by the gray scale image information), so that the alignment with the position information of the curved cover plate 50 is realized, and the attachment effect of the remaining flexible display panel 60 of the subsequent curved cover plate 50 is ensured. Thus, the attaching jig can also comprise an information acquisition device and a corresponding control device, so that the flexible display panel 60 and the curved cover plate 50 can be accurately aligned.

In the embodiment of the present disclosure, the controller for controlling the energization of the piezoelectric layer 22 may be independent from the attaching jig, that is, the controller may be separately disposed, and of course, the controller may also be included in the attaching jig. The controller may be a piezoelectric controller 30.

For example, as shown in fig. 2, the attaching jig further includes a piezoelectric controller 30, and the piezoelectric controller 30 is electrically connected to the piezoelectric layer 22, so as to control the piezoelectric layer 22 to be powered on through the piezoelectric controller 30.

In the real-time manner of the present disclosure, the lifting driving device 40 for driving the upper jig 10 and the lower jig 20 to be pressed together may be independent from the attaching jig, that is, the lifting driving device 40 may be separately disposed, and of course, the lifting driving device 40 may also be included in the attaching jig. That is, as shown in fig. 2, the attaching jig further includes a lifting driving device 40, and the lifting driving device 40 is connected to at least one of the upper jig 10 and the lower jig 20 and is used for driving the upper jig 10 and the lower jig 20 to press.

The specific structures of the piezoelectric controller 30 and the lifting driving device 40 described above refer to the related art, and the present disclosure is not limited thereto in a real-time manner as long as the respective corresponding functions can be realized.

In the embodiment of the present disclosure, the fine adjustment of the outer contour of the supporting layer 211 can be realized through the deformation of the supporting layer 211, and the matching between the outer contour of the supporting layer 211 and the curved cover plate 50 is ensured, so that when the lower jig 20 is manufactured, the process of process die testing is avoided, the precision requirement and the manufacturing cost of the lower jig 20 are reduced, and meanwhile, the technical problems that the contour dimension of the lower jig 20 is unqualified, and the mold is repeatedly repaired or multiple lower jigs 20 are simultaneously manufactured can be solved. In addition, when the piezoelectric layer 22 applies an acting force to the support layer 211, the acting force can be gradually reduced and decomposed on the support layer 211 along the radial direction with the acting point as a center of a circle, so as to realize the deformation of a local area of the support layer 211, and avoid the situation of sudden change of stress at the acting point, thereby increasing the stressed area of the flexible display panel 60 and avoiding the damage to the flexible display panel 60.

Because the joint surface of the flexible display panel 60 and the curved cover plate 50 is coated with the adhesive glue, at this time, in order to facilitate the flexible display panel 60 to be attached to the support layer 211 of the carrying table 21, as shown in fig. 3 or fig. 7, the flexible display panel 60 can be fixed on the transfer film 70 first, then the transfer film 70 is fixed by being adsorbed by the vacuum chuck 80, and then the transfer film 70 and the flexible display panel 60 are driven by the vacuum chuck 80 to move integrally so as to be attached to the support layer 211 of the carrying table 21.

In addition, in order to further ensure the quality of the adhesion between the flexible display panel 60 and the flat region of the curved cover 50, the center line of the flat region of the supporting layer 211 has a certain slope in the direction approaching the curved region, that is, when the flexible display panel 60 is adhered to the curved cover 50, as shown in fig. 4, after the flexible display panel 60 corresponding to the center line region (O) of the flat region contacts the curved cover 50, the distance between the flexible display panel 60 corresponding to the flat region and the curved cover 50 gradually increases in the direction approaching the curved region along the center line. Illustratively, the distance between the flexible display panel 60 and the curved cover plate 50 corresponding to the joint of the flat area and the curved area is 0.1 mm.

The central line region (O) is a region where the midpoint of the corresponding cross section of the planar region in the longitudinal direction in fig. 4 is located. The slope of the planar area of the support layer 211 may be determined according to the related art, and it is determined that the planar area of the rear support layer 211 is smoothly curved in a direction approaching the curved area from the center.

In some embodiments, the piezoelectric layer 22 is made of a piezoelectric material, and the piezoelectric layer 22 made of the piezoelectric material has an inverse piezoelectric effect. The inverse piezoelectric effect means that when an electric field is applied in the polarization direction of the piezoelectric layer 22, the piezoelectric layer 22 itself is deformed, and when the applied electric field is removed, the deformation of the piezoelectric layer 22 itself is also disappeared.

The piezoelectric material is an inorganic piezoelectric material or an organic piezoelectric material, and for the inorganic piezoelectric material, the piezoelectric material is piezoelectric crystal or piezoelectric ceramic and the like; as for the organic piezoelectric material, the piezoelectric material is polyvinylidene fluoride (PVDF) (thin film), or other organic piezoelectric (thin film) materials typified by it.

In combination with the inverse piezoelectric effect of the piezoelectric layer 22, when the piezoelectric layer 22 is powered on, the piezoelectric layer 22 deforms and forms an acting force on the support layer 211 of the carrier 21, so as to cause the support layer 211 to deform, and further form an acting force towards the curved cover plate 50 on the flexible display panel 60 through the deformation of the support layer 211, so as to achieve the approach of the flexible display panel 60 to the curved cover plate 50. The deformation occurring when the piezoelectric layer 22 is de-energized disappears, and the piezoelectric layer 22 will no longer exert a force on the support layer 211 of the carrier 21.

Thus, in order to ensure the bonding effect between the flexible display panel 60 and the curved cover plate 50, if the support layer 211 of the platform 21 is elastically deformed, the piezoelectric layer 22 can be controlled to be energized at a certain frequency, and at this time, the piezoelectric layer 22 vibrates at the frequency, and an intermittent force is applied to the support layer 211 of the platform 21 to ensure that the support layer 211 can be elastically deformed at the frequency, so as to form an intermittent force on the flexible display panel 60. If the support layer 211 of the carrier 21 is plastically deformed, the piezoelectric layer 22 is initially controlled to be energized to cause the support layer 211 of the carrier 21 to deform, and the support layer 211 remains deformed after the piezoelectric layer 22 is de-energized, thereby ensuring that a continuous force is formed on the flexible panel.

Wherein, when an electric field is applied in the polarization direction of the piezoelectric layer 22, the piezoelectric layer 22 located at the corresponding portion of the curved surface region has a deformation direction along the radial direction of the curved surface region; the piezoelectric layer 22, which is located in a corresponding portion of the planar area, is deformed in a direction perpendicular to the planar area.

The energizing frequency of the piezoelectric layer 22 may be 50kHz or 100kHz, and of course, the energizing frequency of the piezoelectric layer 22 may also be other values, which is not limited in the embodiment of the disclosure as long as the high-frequency vibration of the piezoelectric layer 22 can be realized. The amplitude of the piezoelectric layer 22 as it vibrates can be on the order of microns. Thus, the micro-scale vibration of the piezoelectric layer 22 can be used to fine-tune the outer contour of the support layer 211, that is, the adjustment precision of the outer contour of the support layer 211 is improved, so that the flexible display panel 60 is effectively attached to the curved cover plate 50, and the flexible display panel 60 is prevented from being damaged.

Wherein the voltage applied to the piezoelectric layer 22 is proportional to the resulting amplitude when the piezoelectric layer 22 deforms. Thus, the maximum amplitude of the deformation of the piezoelectric layer 22 can be adjusted by adjusting the maximum voltage applied to the piezoelectric layer 22, and the magnitude of the force acting on the support layer 211 of the stage 21 can be adjusted. Therefore, when the deformation of the supporting layer 211 is controlled, the self-defining degree of the outer contour supplement of the supporting layer 211 is improved.

The same applied voltage will correspond to different amplitudes for different materials and different sizes of piezoelectric layer 22. Illustratively, the material is a PST ceramic, and the piezoelectric layer 22 has a length, width, and thickness of 18 mm, 3 mm, and 2 mm, respectively, and has an amplitude of 20 μm when a voltage of 150 v is applied.

In the present embodiment, the piezoelectric layer 22 has a sheet-like structure, or the piezoelectric layer 22 is formed by arranging a plurality of piezoelectric units.

When the piezoelectric layers 22 are sheet-like structures, if the piezoelectric layers 22 are only distributed on the portions corresponding to the curved surface areas in the carrier stage 21, the number of the piezoelectric layers 22 is equal to the number of the curved surface areas, and the shapes of the piezoelectric layers are the same. If the piezoelectric layers 22 are distributed in the corresponding portions of the planar area and the curved area in the carrier table 21, the number of the piezoelectric layers 22 is 1 and the area of the piezoelectric layers 22 is smaller than or equal to the area of the support layer 211.

When the piezoelectric layer 22 includes a plurality of piezoelectric units, the plurality of piezoelectric units are arranged in an array and distributed in a portion corresponding to the curved surface area in the carrier table 21, or distributed in a portion corresponding to the planar area and the curved surface area in the carrier table 21.

For the included multiple piezoelectric units, the multiple piezoelectric units can be controlled to be sequentially powered on according to a specified direction, so that bubbles between the flexible display panel 60 and the curved cover plate 50 are conveniently discharged. For a planar area of the support layer 211, the specified direction is from the planar area of the support layer 211 to a direction near the curved area; for a curved area of the support layer 211, the given direction is a direction away from the planar area on a path where the curved area bends.

Illustratively, for the plurality of piezoelectric units, the piezoelectric units are uniformly distributed in the length direction of the bending axis of the curved surface area, and the piezoelectric units are uniformly distributed in the direction perpendicular to the length direction of the bending axis of the curved surface area for the part of the piezoelectric units corresponding to the curved surface area, and of course, the piezoelectric units can also be distributed discretely; the corresponding portions of the piezoelectric elements for the planar area may be uniformly distributed. In this way, the force generated on the support layer 211 when the piezoelectric layer 22 is energized is more uniform, and the situation that the outer contour of the support layer 211 changes abruptly locally is avoided.

For a rectangular plane area, both sides of the long side of the plane area are connected with curved surface areas, and thus, the length direction of the bending axis of the curved surface area is the direction of the long side of the plane area. For a circular planar area, the curved area surrounds the edge of the planar area, and thus, the length direction of the bending axis of the curved area is the circumferential direction of the planar area. The discrete distribution of the piezoelectric units means that the parts corresponding to the curved surface areas are more sparse and more dense as the parts are closer to the positions spliced with the planar areas, and the parts are more distant from the positions spliced with the planar areas. Illustratively, the distance between two adjacent piezoelectric units in the length direction of the bending axis of the curved surface region is less than or equal to 3 mm.

It should be noted that, since the corresponding dimension of the curved surface region is smaller in the direction perpendicular to the length direction of the bending axis of the curved surface region, only a few sporadic piezoelectric units need to be arranged to meet the requirement of attaching the flexible display panel 60 to the curved surface cover plate 50. In order to accurately determine the number and arrangement of the piezoelectric units, more piezoelectric units can be preset, and in the debugging process, the piezoelectric units can be selectively electrified, and the outline of the flexible display panel 60 and the outline of the curved cover plate 50 are obtained through the camera device, so that the attaching effect of the flexible display panel 60 and the curved cover plate 50 is detected. If the attaching effect meets the requirement, the number and arrangement of the piezoelectric units can be determined according to the selected plurality of piezoelectric units. Therefore, the subsequent manufacture of the lower jig 20 is facilitated, and the die testing cost is reduced.

In the embodiment of the present disclosure, as shown in fig. 3 or fig. 7, the carrier table 21 includes a carrier body 212. The support layer 211 is attached to the surface of the carrier body 212 and the piezoelectric layer 22 is located between the support layer 211 and the carrier body 212 or within the support layer 211.

The bearing body 212 is made of a material with high hardness, so that the bearing body 212 can be prevented from deforming when an external force is applied. The attachment surface of the support layer 211 completely adheres to the surface of the support body 212, so as to ensure that the support body 212 supports the support layer 211.

In conjunction with the above description, the material of the curved surface region of the support layer 211 may be an elastic material or a plastic material. Illustratively, when an elastic material, the material of the curved surface region of the support layer 211 is a silicone material.

The piezoelectric layer 22 may be fixed on the surface of the carrier body 212 or on the attachment surface of the support layer 211, and of course, the piezoelectric layer 22 may also be embedded in the support layer 211 or embedded in the carrier body 212.

When piezoelectric layer 22 is embedded in carrier body 212, piezoelectric layer 22 is exposed at the surface of carrier body 212 in order to exert an effective force on support layer 211 when piezoelectric layer 22 is energized. Illustratively, the piezoelectric layer 22 includes a plurality of piezoelectric units, the surface of the carrier body 212 is provided with a mounting groove, the plurality of piezoelectric units are mounted in the corresponding mounting grooves, and the piezoelectric units are flush with the surface of the carrier body 212.

In some embodiments, as shown in fig. 4, 5, or 6, the support layer 211 includes a first planar region 2111, a first curved region 2115, and a second curved region 2116; the first curved surface area 2115 and the second curved surface area 2116 are located on the same side of the first planar area 2111 in the thickness direction, an intrados of the first curved surface area 2115 is opposite to an intrados of the second curved surface area 2116, and the first curved surface area 2115 and the second curved surface area 2116 are connected to two opposite side edges of the first planar area 2111.

The bending degree of the first curved surface area 2115 and the second curved surface area 2116 is less than or equal to 90 degrees. As can be seen, the lower jig 20 according to the embodiment of the present disclosure is suitable for bonding the curved cover 50 with a small curvature to the flexible display panel 60, and is also suitable for bonding the curved cover 50 with a large curvature to the flexible display panel 60. The curved cover plate 50 with small curvature generally means the curved cover plate 50 with the bending angle of the bending region less than or equal to 20 degrees, and the curved cover plate 50 with large curvature generally means the curved cover plate 50 with the bending angle of the bending region more than 20 degrees and less than or equal to 90 degrees.

The first curved surface area 2115 and the second curved surface area 2116 can deform under the action of an external force applied by the piezoelectric layer 22, and in order to realize that the first curved surface area 2115 and the second curved surface area 2116 are subjected to an acting force applied by the piezoelectric layer 22, the piezoelectric layer 22 is distributed between the first curved surface area 2115 and the bearing body 212 and between the second curved surface area 2116 and the bearing body 212.

The shore hardness of the material of the first curved surface region 2115 and the second curved surface region 2116 is 40A, and the thicknesses of the first curved surface region 2115 and the second curved surface region 2116 are both greater than or equal to 5 mm and less than or equal to 15 mm. Illustratively, the material of first curved surface region 2115 and second curved surface region 2116 has a shore hardness of 40A, and the thickness of first curved surface region 2115 and second curved surface region 2116 is 10 mm. 40A refers to the value obtained by using a Shore A durometer.

Further, the first planar area 2111 can also be deformed by an external force applied by the piezoelectric layer 22, and the material of the first planar area 2111 is the same as that of the first curved area 2115 and the second curved area 2116.

In other embodiments, as shown in fig. 8, the support layer 211 includes a second planar region 2112, a third planar region 2113, a fourth planar region 2114, a third curved region 2117, and a fourth curved region 2118.

The third planar region 2113 and the fourth planar region 2114 are on the same side as the second planar region 2112 in the thickness direction, and projections of the third planar region 2113 and the fourth planar region 2114 in the thickness direction are both located within the second planar region 2112; a third curved surface region 2117 is located between the second planar region 2112 and the third planar region 2113, a fourth curved surface region 2118 is located between the second planar region 2112 and the fourth planar region 2114, and the intrados of the third curved surface region 2117 and the intrados of the fourth curved surface region 2118 are opposite; two straight side edges of the third curved surface region 2117 are connected to the side edges of the second planar region 2112 and the third planar region 2113 on the same side, respectively, and two straight side edges of the fourth curved surface region 2118 are connected to the side edges of the second planar region 2112 and the fourth planar region 2114 on the same side, respectively.

The bending degree of the third curved surface area 2117 and the fourth curved surface area 2118 is greater than or equal to 90 degrees and less than or equal to 180 degrees. As can be seen, the lower jig 20 according to the embodiment of the present disclosure is suitable for bonding the inverted curved cover 50 to the flexible display panel 60 as well as for bonding the curved cover 50 with a small curvature and the curved cover 50 with a large curvature to the flexible display panel 60. The inverted curved cover plate 50 generally refers to a curved cover plate 50 having straight regions spliced to both sides of a bending region.

When the flexible display panel 60 is attached to the inverted-type curved cover plate 50, the flexible display panel 60 is attached to the support layer 211 of the support layer 211, and for convenience of placing the support layer 211 and the flexible display panel 60 in the area surrounded by the inverted-type curved cover plate 50, the cross-sectional size of the area surrounded by the flexible display panel 60 is smaller than that of the area surrounded by the curved cover plate 50. In this case, in order to facilitate the attachment between the expanded flexible display panel 60 and the curved cover plate 50, piezoelectric layers 22 are distributed between the second planar region 2112, the third planar region 2113, the fourth planar region 2114, the third curved region 2117, the fourth curved region 2118 and the carrier body 212, and the second planar region 2112, the third planar region 2113, the fourth planar region 2114, the third curved region 2117 and the fourth curved region 2118 can deform under the action of an external force applied by the piezoelectric layers 22.

Therefore, the piezoelectric layer 22 can be controlled to be electrified so as to promote the overall outer contour of the support layer 211 to generate expansion deformation, further promote the flexible display panel 60 to have a tendency of being close to the curved cover plate 50, and ensure the normal fit of the flexible display panel 60 and the curved cover plate 50.

The amplitude of the piezoelectric layer 22 when it is powered on can be set slightly larger, so that the support layer 211 and the flexible display panel 60 can be conveniently arranged in the area enclosed by the inverted curved cover plate 50 before the piezoelectric layer 22 is powered on. The shore hardness of the material of the second planar region 2112, the third planar region 2113, the fourth planar region 2114, the third curved region 2117, and the fourth curved region 2118 is 40A, and the thicknesses of the second planar region 2112, the third planar region 2113, the fourth planar region 2114, the third curved region 2117, and the fourth curved region 2118 are each greater than or equal to 5 mm and less than or equal to 15 mm. Illustratively, the materials of the second, third, fourth

planar regions

2112, 2113, 2114, third curvilinear region 2117, and fourth curvilinear region 2118 have a shore hardness of 40A, and the first and second

curvilinear regions

2115, 2116 have a thickness of 7 millimeters.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. The utility model provides a laminating tool which characterized in that includes:

the lower jig comprises a bearing table and a piezoelectric layer;

2. The bonding jig of claim 1, wherein the carrier comprises a carrier body;

3. The bonding tool of claim 2, wherein the support layer comprises a first planar region, a first curved region, and a second curved region;

the first curved surface area and the second curved surface area are respectively connected with two opposite side edges of the first plane area;

4. The bonding jig according to claim 3, wherein the piezoelectric layer is distributed between the first curved surface region and the carrier body and between the second curved surface region and the carrier body.

5. The attachment jig of claim 3 or 4, wherein the materials of the first curved surface region and the second curved surface region have a Shore hardness of 40A, and the thicknesses of the first curved surface region and the second curved surface region are both greater than or equal to 5 mm and less than or equal to 15 mm.

6. The bonding jig of claim 2, wherein the support layer comprises a second planar region, a third planar region, a fourth planar region, a third curved region, and a fourth curved region;

7. The bonding jig of claim 6, wherein the piezoelectric layer is distributed between the second planar region, the third planar region, the fourth planar region, the third curved region and the fourth curved region and the carrier body;

8. The bonding jig of claim 1, wherein the piezoelectric layer comprises a plurality of piezoelectric units, and the piezoelectric units are uniformly distributed along a length direction of a bending axis of the curved surface region.

9. The bonding jig according to claim 8, wherein a distance between two adjacent piezoelectric units in a length direction of a bending axis of the curved surface region is less than or equal to 3 mm.

10. The bonding jig of claim 1, further comprising:

a piezoelectric controller electrically connected to the piezoelectric layer;