CN114360381B - Flexible display module and mobile terminal - Google Patents
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- CN114360381B CN114360381B CN202210012860.1A CN202210012860A CN114360381B CN 114360381 B CN114360381 B CN 114360381B CN 202210012860 A CN202210012860 A CN 202210012860A CN 114360381 B CN114360381 B CN 114360381B
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- 239000000853 adhesive Substances 0.000 claims abstract description 127
- 230000001070 adhesive effect Effects 0.000 claims abstract description 127
- 239000012790 adhesive layer Substances 0.000 claims abstract description 77
- 239000010410 layer Substances 0.000 claims abstract description 57
- 239000002346 layers by function Substances 0.000 claims abstract description 53
- 238000005452 bending Methods 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 30
- 238000009826 distribution Methods 0.000 claims description 20
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 9
- 230000005489 elastic deformation Effects 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 description 19
- 238000000926 separation method Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 239000004568 cement Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000003475 lamination Methods 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The application discloses a flexible display module and a mobile terminal; the flexible display module comprises a functional layer, a display panel arranged on the functional layer, and an adhesive layer arranged between the functional layer and the display panel, wherein the adhesive layer comprises a plurality of adhesive posts, and the display panel is connected with the functional layer through the adhesive posts; according to the application, the adhesive layer with the plurality of adhesive posts is arranged between the functional layer and the display panel, and the adhesive posts have elasticity and can generate elastic deformation along with the relative displacement of the film layers, so that the technical problem that the film layers are separated after the flexible display module is bent is solved.
Description
Technical Field
The application relates to the technical field of display, in particular to a flexible display module and a mobile terminal.
Background
The OLED (Organic Light-Emitting Diode) display technology gradually becomes the mainstream technology in the display field with the unique advantages of low power consumption, high saturation, fast response time, wide viewing angle and the like, and particularly a flexible display module therein.
When the flexible display module is bent, for example, when the flexible display module is curled or folded, the film layers on the two sides of the optical adhesive are relatively displaced, namely, when the displacement exceeds the displacement range which can be born by the optical adhesive, irreversible film layer separation can be caused on the film layers on the two sides of the optical adhesive, so that the display effect of the display module is affected.
Disclosure of Invention
The application provides a flexible display module and a mobile terminal, which are used for solving the technical problem that film layers on two sides of optical cement in the conventional flexible display module are separated irreversibly.
In order to solve the above problems, the technical scheme provided by the application is as follows:
the application provides a flexible display module, which comprises:
a functional layer;
the display panel is arranged on the functional layer; and
the bonding layer is arranged between the functional layer and the display panel;
the functional layer is connected with the display panel through the plurality of bonding posts.
In the flexible display module, the first end of the bonding post is connected with the display panel, the second end of the bonding post is connected with the functional layer, and the cross section area of the bonding post tends to decrease first and then increase in the direction from the first end to the second end.
In the flexible display module, the display panel comprises a bending region and non-bending regions positioned at two sides of the bending region, and the bonding layer comprises a first bonding part positioned in the bending region and a second bonding part positioned in the non-bending region;
wherein the elastic modulus of the first bonding part is smaller than that of the second bonding part.
In the flexible display module of the present application, the adhesive pillars in the first adhesive portion have a first distribution density, and the adhesive pillars in the second adhesive portion have a second distribution density, and the first distribution density is smaller than the second distribution density.
In the flexible display module of the present application, the volume of the adhesive post in the first adhesive portion is smaller than the volume of the adhesive post in the second adhesive portion.
In the flexible display module of the present application, the first bonding portion includes a material having a first elastic modulus, and the second bonding portion includes a material having a second elastic modulus, the first elastic modulus being smaller than the second elastic modulus.
In the flexible display module, a flexible material is filled among the plurality of bonding posts, and the elastic modulus of the flexible material is smaller than that of the bonding posts.
In the flexible display module of the present application, the display panel includes a curled portion, and the elastic modulus of the adhesive layer near the central axis of the curled portion is smaller than the elastic modulus of the adhesive layer far from the central axis of the curled portion.
In the flexible display module of the present application, the adhesive layer has a thickness of 0.3 mm to 0.6 mm.
The application also provides a mobile terminal comprising a terminal body and a flexible display module according to any one of claims 1 to 9, the terminal body and the flexible display module being combined into one body.
The beneficial effects are that: the application discloses a flexible display module and a mobile terminal; the flexible display module comprises a functional layer, a display panel arranged on the functional layer, and an adhesive layer arranged between the functional layer and the display panel, wherein the adhesive layer comprises a plurality of adhesive posts, and the display panel is connected with the functional layer through the adhesive posts; according to the application, the adhesive layer with the plurality of adhesive posts is arranged between the functional layer and the display panel, and the adhesive posts have elasticity and can generate elastic deformation along with the relative displacement of the film layers, so that the technical problem that the film layers are separated after the flexible display module is bent is solved.
Drawings
The technical solution and other advantageous effects of the present application will be made apparent by the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a block diagram of a flexible display module of the present application;
FIG. 2 is a cross-sectional view of a flexible display module according to the present application;
FIG. 3 is a cross-sectional view of an adhesive layer of the flexible display module of the present application;
fig. 4 is an enlarged cross-sectional structure view of an adhesive layer of the flexible display module of the present application;
FIG. 5 is another block diagram of the flexible display module of the present application;
FIG. 6 is a flow chart of the flexible display module according to the present application;
FIG. 7A is a process diagram of a flexible display module according to the present application;
FIG. 7B is a further process diagram of the flexible display module of the present application;
FIG. 7C is another process diagram of the flexible display module of the present application;
fig. 7D is a further process diagram of the flexible display module of the present application.
Reference numerals illustrate:
the display module 10, the functional layer 100, the adhesive layer 200, the display panel 300, the adhesive post 230, the bending region 310, the non-bending region 320, the first adhesive portion 210, the second adhesive portion 220, the curled portion 330, the central axis 331, the SUS supporting film 101, the optical adhesive 201, the flexible process supporting film 301, the OLED display layer 401, the polarizer 501, the lower adsorption platform 601, and the upper adsorption and lamination platform 602.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the application. In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
When the flexible display module is bent, for example, when the flexible display module is curled or folded, the film layers on the two sides of the optical adhesive are relatively displaced, namely, when the displacement exceeds the displacement range which can be born by the optical adhesive, irreversible film layer separation can be caused on the film layers on the two sides of the optical adhesive, so that the display effect of the display module is affected. The application provides the following scheme based on the technical problems.
Referring to fig. 1 to 4, the present application provides a flexible display module 10, which includes a functional layer 100, a display panel 300 disposed on the functional layer 100, and an adhesive layer 200 disposed between the functional layer 100 and the display panel 300.
In this embodiment, the adhesive layer 200 includes a plurality of adhesive posts 230, and the functional layer 100 and the display panel 300 are connected by the plurality of adhesive posts 230.
According to the application, the adhesive layer 200 with the plurality of adhesive posts 230 is arranged between the functional layer 100 and the display panel 300, and the adhesive posts 230 have elasticity and can generate elastic deformation along with the relative displacement of the film layers, so that the technical problem that the film layers are separated after the flexible display module 10 is bent is avoided.
In this embodiment, the display panel 300 may be a flexible display panel, such as an OLED panel, a Mini-LED panel, a Micro-LED panel, or the like. The display panel 300 may be folded or curled or the like.
In this embodiment, the adhesive layer 200 may be an optical adhesive, an elastic adhesive, or the like.
In this embodiment, the functional layer 100 may be a rigid supporting layer, and the material of the functional layer may include a metal or alloy plate/sheet such as a stainless steel plate/sheet, or may be other film layers attached to the optical adhesive, such as a cover plate, a flexible supporting film, and the like.
The technical scheme of the present application will now be described with reference to specific embodiments. The following description of the embodiments is not intended to limit the preferred embodiments.
When the flexible display module is bent, for example, when the flexible display module is folded or curled, relative displacement can occur between the film layers, and when the elasticity of the adhesive layer is insufficient, larger stress can be generated at the relative displacement position inside the adhesive layer, so that the adhesive layer is separated from the film layers on two sides of the adhesive layer. Therefore, the adhesive layer needs to have a large elastic force. Meanwhile, in order to ensure enough adhesiveness between the adhesive layer and the film layers on two sides, the adhesive layer needs to have enough contact area with the film layers on two sides, and the larger the contact area is, the larger the adhesiveness between the adhesive layer and the film layers on two sides is. In order to realize the tight adhesion of the adhesive layer and the film layers at two sides and simultaneously have larger elasticity, thereby avoiding the problem of the separation of the film layers at two sides of the adhesive layer caused by insufficient adhesion or insufficient elasticity.
Referring to fig. 1 to 4, in the flexible display module 10 of the present application, a first end of the adhesive post 230 is connected to the display panel 300, a second end of the adhesive post 230 is connected to the functional layer 100, and a cross-sectional area of the adhesive post 230 tends to decrease first and then increase in a direction from the first end to the second end.
Since the first and second ends of the adhesive post 230 have larger cross-sectional areas, the contact area of the first end of the adhesive post 230 with the lower surface of the display panel 300 is larger, the adhesiveness is greater, and the lower surface of the display panel 300 can be better connected. Similarly, the second end of the adhesive post 230 can be better connected to the upper surface of the functional layer 100. The middle section of the adhesive post 230 has a smaller cross-sectional area, and is more easily elastically deformed, and the stress generated during deformation is smaller. When the display panel 300 is folded or curled, the adhesive posts 230 can elastically deform along with the deformation of the display panel 300, so that the two ends of the adhesive posts 230 can be prevented from being separated from the display panel 300 or the functional layer 100, and further the separation of the display panel 300 from the film of the functional layer 100 can be prevented.
In this embodiment, the first end and the second end of the adhesive post 230 are set to have a larger cross-sectional area, and the middle section is set to have a smaller cross-sectional area, so that the adhesive post 230 has good adhesive performance and elastic performance, and can elastically deform following the deformation of the display panel 300, thereby avoiding the problem of separation of the display panel 300 and the film layer of the functional layer 100.
The flexible display module 10 of the present application can be divided into a folding screen and a rolling screen according to the bending mode thereof, and the specific states faced in the bending process are different due to the different bending states of the folding screen and the rolling screen, so that the technical characteristics of the adhesive layers are different to a certain extent. The following describes in detail a case where the flexible display module 10 is a folding screen.
When the flexible display module 10 is a folding screen, the stress states of the flexible display module in the bending area and the non-bending area are different, and the deformation of the film layer is also different, so that the bonding layer in the bending area and the bonding layer in the non-bending area have different technical characteristics, thereby coping with the different deformation conditions faced by the two. The film layer in the bending region is stressed more, the deformation amount is larger, and the film layer in the non-bending region is stressed less, and the deformation amount is smaller. Therefore, the bonding layer in the bending region needs to have a smaller elastic modulus, and when the elastic modulus is smaller, the bonding layer is easier to elastically deform, so that the stress in the bonding layer is reduced, and the technical problem of film separation is avoided.
Referring to fig. 1 to 3, in the flexible display module 10 of the present application, the display panel 300 includes a bending region 310 and non-bending regions 320 located at two sides of the bending region 310, and the adhesive layer 200 includes a first adhesive portion 210 located in the bending region 310 and a second adhesive portion 220 located in the non-bending region 320; wherein the elastic modulus of the first adhesive portion 210 is smaller than the elastic modulus of the second adhesive portion 220.
In this embodiment, since the first bonding portion 210 in the bending region 310 has a smaller elastic modulus, the first bonding portion 210 is easier to elastically deform, which is beneficial to the first bonding portion 210 to elastically deform following the deformation of the display panel 300, so as to avoid the problem of separation of the display panel 300 and the film layer of the functional layer 100. The second adhesive portion 220 in the non-bending region 320 has a larger elastic modulus, and is less prone to be elastically deformed than the bending region 310, and is capable of better transmitting force, so as to facilitate the functional layer 100 to provide a supporting function for the display panel 300.
In this embodiment, the first bonding portion 210 in the bending region 310 and the second bonding portion 220 in the non-bending region 320 are set to have different elastic moduli, that is, the elastic modulus of the first bonding portion 210 is smaller than that of the second bonding portion 220, so that the bending region 310 has better bending performance, and the problem of separation of the display panel 300 and the film layer of the functional layer 100 is avoided. At the same time, the non-inflection region 320 is provided with better support properties.
In the flexible display module 10 of the present application, the adhesive studs 230 in the first adhesive part 210 have a first distribution density, and the adhesive studs 230 in the second adhesive part 220 have a second distribution density, and the first distribution density is smaller than the second distribution density.
In the present embodiment, the first distribution density refers to the number of the adhesive studs 230 provided in a unit area of the first adhesive part 210, and the second distribution density refers to the number of the adhesive studs 230 provided in a unit area of the second adhesive part 220.
In this embodiment, the first distribution density of the adhesive posts 230 in the first adhesive portion 210 is set to be smaller than the second distribution density of the adhesive posts 230 in the second adhesive portion 220, so that the elastic modulus of the first adhesive portion 210 is smaller than the elastic modulus of the second adhesive portion 220, and the bending region 310 can have better bending performance, so as to avoid the problem of separation of the display panel 300 and the film layer of the functional layer 100.
In the flexible display module 10 of the present application, the volume of the adhesive post 230 in the first adhesive portion 210 is smaller than the volume of the adhesive post 230 in the second adhesive portion 220.
In this embodiment, the thickness of the first adhesive portion 210 is equal to the thickness of the second adhesive portion 220, and the volume of the adhesive post 230 in the first adhesive portion 210 is smaller than the volume of the adhesive post 230 in the second adhesive portion 220 by making the cross-sectional area of the adhesive post 230 in the first adhesive portion 210 smaller than the cross-sectional area of the adhesive post 230 in the second adhesive portion 220.
In this embodiment, the volume of the adhesive post 230 in the first adhesive portion 210 is set smaller than the volume of the adhesive post 230 in the second adhesive portion 220, so that the elastic modulus of the first adhesive portion 210 is smaller than the elastic modulus of the second adhesive portion 220, and the bending region 310 can have better bending performance, so as to avoid the problem of separation of the display panel 300 and the film layer of the functional layer 100.
In the flexible display module 10 of the present application, the first adhesive part 210 includes a material having a first elastic modulus, and the second adhesive part 220 includes a material having a second elastic modulus, and the first elastic modulus is smaller than the second elastic modulus.
In this embodiment, the first adhesive part 210 may have one or more materials, and the second adhesive part 220 may have one or more materials. The elastic modulus of any one of the materials of the first adhesive portion 210 is smaller than the elastic modulus of any one of the materials of the second adhesive portion 220.
In this embodiment, the first elastic modulus of the material of the first bonding portion 210 is set to be smaller than the second elastic modulus of the material of the second bonding portion 220, so that the elastic modulus of the first bonding portion 210 is smaller than the elastic modulus of the second bonding portion 220, so that the bending region 310 has better bending performance, and the problem of separation of the display panel 300 and the film layer of the functional layer 100 is avoided.
Regardless of whether the flexible display module 10 is a folding screen or a rolling screen, when the flexible display module 10 is bent, the adhesive columns are elastically deformed, the supporting force is weak, collapse may occur due to excessively soft adhesive layers, and uneven surfaces of the display panel may be caused. In order to solve this problem, the following means are proposed.
In the flexible display module 10 of the present application, a flexible material is filled between the plurality of adhesive posts 230, and the flexible material has an elastic modulus smaller than that of the adhesive posts 230.
In this embodiment, a flexible material is filled between the plurality of adhesive posts 230, and the elastic modulus of the flexible material is smaller than that of the adhesive posts 230, and the flexible material can elastically deform following the deformation of the adhesive posts 230. The flexible material can properly enhance the supporting capability of the adhesive layer 200, prevent the adhesive layer 200 from collapsing due to excessive softness, and further cause uneven surface of the display panel 300.
In this embodiment, when the display panel 300 is a folding screen, the flexible material may be filled in the first bonding portion 210 located in the bending region 310 and the second bonding portion 220 located in the non-bending region 320, or may be filled in only the second bonding portion 220.
When the display panel 300 is a curled screen, the filling amount of the flexible material may be set according to a radius of curvature of the curled screen, where the radius of curvature is large, and where the radius of curvature is small, the filling amount of the flexible material is small.
In this embodiment, the flexible material is filled between the plurality of adhesive columns 230, so that the supporting capability of the adhesive layer 200 can be properly improved, and the adhesive layer 200 is prevented from being too soft to collapse, thereby causing uneven surface of the display panel 300.
The following describes the flexible display module 10 in detail as a curled screen. When the flexible display module 10 is a curled screen, the adhesive layer near the central axis of the curled portion has a smaller radius of curvature, and correspondingly, the stress and deformation inside the adhesive layer are larger; the adhesive layer at a position far from the central axis of the curled portion has a larger radius of curvature, and correspondingly, the stress and deformation inside the adhesive layer are smaller. Therefore, in the curled state of the curled screen, the film layer near the central axis of the curled portion is different from the film layer far from the central axis of the curled portion in the state faced by the film layer, that is, the film layer near the central axis of the curled portion needs to have a smaller elastic modulus, and when the elastic modulus is smaller, the adhesive layer is more easily elastically deformed, so that the stress in the adhesive layer is reduced, and the technical problem of film layer separation is avoided.
Referring to fig. 1 and 5, in the flexible display module 10 of the present application, the display panel 300 includes a curled portion 330, and the elastic modulus of the adhesive layer 200 near the central axis 331 of the curled portion 330 is smaller than the elastic modulus of the adhesive layer 200 far from the central axis 331 of the curled portion 330.
In this embodiment, the flexible display module 10 may be curled around the central axis 331 of the curling portion 330. The flexible display module 10 includes a display panel 300, an adhesive layer 200, and a functional layer 100, and the film structure thereof can refer to fig. 1, which is not described herein.
Since the adhesive layer 200 near the central axis 331 of the curled portion 330 of the display panel 300 has a smaller radius of curvature, the adhesive posts 230 in the adhesive layer 200 have a larger deformation, and thus a smaller elastic modulus is required, so that the adhesive posts 230 in the adhesive layer 200 can be more easily elastically deformed, and the problem of separation of the display panel 300 from the film layer of the functional layer 100 is avoided. In contrast, the adhesive layer 200 far from the central axis 331 of the curled portion 330 of the display panel 300 has a larger radius of curvature, and relatively speaking, the adhesive posts 230 in the adhesive layer 200 have smaller deformation, so that the adhesive layer has a larger elastic modulus, and the problem of separation of the display panel 300 from the film layer of the functional layer 100 is avoided.
In this embodiment, by setting the elastic modulus of the adhesive layer 200 near the central axis 331 of the curled portion 330 to be smaller than the elastic modulus of the adhesive layer 200 far from the central axis 331 of the curled portion 330, the adhesive layer 200 can adapt to different elastic deformation amounts of the curled portion 330 in the curling process, so as to avoid the problem that the display panel 300 is separated from the film layer of the functional layer 100.
In the flexible display module 10 of the present application, the distribution density of the adhesive layer 200 gradually increases in a direction away from the central axis 331 of the curled portion 330 of the display panel 300.
In this embodiment, the flexible display module 10 may be curled around the central axis 331 of the curling portion 330.
Since the distribution density of the adhesive layer 200 near the central axis 331 of the curled portion 330 of the display panel 300 is small, the structure thereof has a smaller elastic modulus. Thereby ensuring that the adhesive posts 230 in the adhesive layer 200 can be elastically deformed more easily, and avoiding the problem of separation of the display panel 300 from the film layer of the functional layer 100.
The present embodiment ensures that the adhesive posts 230 in the adhesive layer 200 can be elastically deformed more easily by setting the distribution density of the adhesive layer 200 near the central axis 331 of the curled portion 330 of the display panel 300 to be smaller than the distribution density of the adhesive layer 200 near the central axis 331 of the curled portion 330 of the display panel 300, thereby avoiding the problem of separation of the display panel 300 from the film layer of the functional layer 100.
In the flexible display module 10 of the present application, the volume of the adhesive post 230 of the adhesive layer 200 gradually increases in a direction away from the central axis 331 of the curled portion 330 of the display panel 300.
In this embodiment, the flexible display module 10 may be curled around the central axis 331 of the curling portion 330.
Since the volume of the adhesive post 230 of the adhesive layer 200 near the central axis 331 of the curled portion 330 of the display panel 300 is smaller, the structure therein has a smaller elastic modulus. Thereby ensuring that the adhesive posts 230 in the adhesive layer 200 can be elastically deformed more easily, and avoiding the problem of separation of the display panel 300 from the film layer of the functional layer 100.
The present embodiment ensures that the adhesive stud 230 in the adhesive layer 200 can be elastically deformed more easily by setting the volume of the adhesive stud 230 of the adhesive layer 200 near the center axis 331 of the curled portion 330 of the display panel 300 to be smaller than the volume of the adhesive stud 230 of the adhesive layer 200 far from the center axis 331 of the curled portion 330 of the display panel 300, thereby avoiding the problem of separation of the display panel 300 from the film layer of the functional layer 100.
In the flexible display module 10 of the present application, the thickness of the adhesive layer 200 is 0.3 mm to 0.6 mm.
In this embodiment, the thickness of the adhesive layer 200 is in the range of 0.3 mm to 0.6 mm. Since uneven thickness easily causes a crease problem where a difference in thickness occurs, the adhesive layer 200 in the present embodiment is provided to have uniform thickness.
The application also provides a mobile terminal comprising a terminal body and a flexible display module according to any one of claims 1 to 9, the terminal body and the flexible display module being combined into one body. In this embodiment, the display terminal may be an intelligent electronic display device such as a mobile phone, a computer, a television, a watch, or the like.
Referring to fig. 6 and fig. 7A to fig. 7D, the present application further provides a method for manufacturing a flexible display module:
s100, a display panel 300 is provided.
In this embodiment, the display panel 300 may be a flexible display panel, such as an OLED panel, a Mini-LED panel, a Micro-LED panel, or the like. The display panel 300 may be folded or curled or the like.
Referring to fig. 7A, the method for manufacturing the flexible display module is described with reference to the actual process flow, the display panel 300 includes a polarizer 501, an OLED display layer 401, and a flexible process support film 301, and a cover plate (not shown) may be attached to the polarizer 501.
S200, providing a functional layer 100, and forming an adhesive material layer on the functional layer 100.
Referring to fig. 7B, in the present embodiment, the adhesive material layer is an optical adhesive 201. The functional layer 100 is a SUS support film 101. The thickness of the optical cement 201 may be 0.1 mm to 0.3 mm. The optical cement 201 is formed by slit coating, ink-jet printing, and the like.
In this embodiment, the SUS support film 101 is placed on the lower suction stage 601 and is fixed by vacuum suction by the lower suction stage 601.
And S300, bonding the backlight side of the display panel 300 to the side of the functional layer 100 where the adhesive layer is formed, so that the adhesive layer forms the adhesive layer 200 including the plurality of adhesive posts 230.
Referring to fig. 7C to 7D, in the present embodiment, the adhesive post 230 may be formed by stretching in the opposite direction of the attaching direction after attaching. The principle is that a plurality of columnar structures can be formed in the adhesive layer 200 by stretching in the opposite direction before the optical cement 201 is not cured yet. Specifically, the upper adsorption and lamination platform 602 is pressed down, and the display panel composed of the polarizer 501, the OLED display layer 401, and the flexible process support film 301 is bonded to the optical adhesive 201, and bonding is completed. The optical cement 201 is lifted up by the adsorption and lamination platform 602 before being cured, and the display panel fixed by vacuum adsorption is pulled towards the opposite direction of the lamination, and the optical cement 201 stretches out a columnar structure under the action of the pulling force. The distance of upward movement of the upper suction stage is 2 to 3 times the thickness of the adhesive material layer, and preferably may be 0.2 to 0.3 mm.
In this embodiment, the post-lamination stretching time is 1 second to 3 seconds.
S400, curing the adhesive layer.
In this embodiment, the adhesive layer 200 is obtained by curing the optical adhesive 201 formed by stretching in the opposite direction. The optical adhesive 201 is mainly cured by heat, but may be cured by other methods.
In this embodiment, the thickness of the adhesive layer 200 formed after curing is 0.3 mm to 0.6 mm.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The flexible display module and the mobile terminal provided by the embodiment of the application are described in detail, and specific examples are applied to explain the principle and the implementation mode of the application, and the description of the above embodiment is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (9)
1. A flexible display module, comprising:
a functional layer;
the display panel is arranged on the functional layer; and
the bonding layer is arranged between the functional layer and the display panel;
the display panel comprises a display panel body and a functional layer, wherein the functional layer comprises a plurality of bonding columns, the functional layer is connected with the display panel through a plurality of bonding columns, a first end of each bonding column is connected with the display panel, a second end of each bonding column is connected with the functional layer, and the cross section area of each bonding column is in a trend of decreasing first and then increasing in the direction from the first end to the second end.
2. The flexible display module according to claim 1, wherein the display panel comprises a bending region and non-bending regions located at two sides of the bending region, and the adhesive layer comprises a first adhesive portion located in the bending region and a second adhesive portion located in the non-bending region;
wherein the elastic modulus of the first bonding part is smaller than that of the second bonding part.
3. The flexible display module of claim 2, wherein the adhesive posts in the first adhesive portion have a first distribution density and the adhesive posts in the second adhesive portion have a second distribution density, the first distribution density being less than the second distribution density.
4. A flexible display module according to claim 2, wherein the volume of the bond post in the first bond is less than the volume of the bond post in the second bond.
5. The flexible display module of claim 2, wherein the first adhesive portion comprises a material having a first modulus of elasticity and the second adhesive portion comprises a material having a second modulus of elasticity, the first modulus of elasticity being less than the second modulus of elasticity.
6. The flexible display module according to claim 1, wherein a flexible material is filled between the plurality of adhesive posts, and the flexible material has an elastic modulus smaller than that of the adhesive posts.
7. The flexible display module according to claim 1, wherein the display panel includes a curled portion, and the adhesive layer near a central axis of the curled portion has a modulus of elasticity less than a modulus of elasticity of the adhesive layer far from the central axis of the curled portion.
8. A flexible display module according to claim 1, wherein the adhesive layer has a thickness of 0.3 mm to 0.6 mm.
9. A mobile terminal, characterized in that the mobile terminal comprises a terminal body and a flexible display module according to any one of claims 1 to 8, the terminal body and the flexible display module being combined as one body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210012860.1A CN114360381B (en) | 2022-01-07 | 2022-01-07 | Flexible display module and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210012860.1A CN114360381B (en) | 2022-01-07 | 2022-01-07 | Flexible display module and mobile terminal |
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| Publication Number | Publication Date |
|---|---|
| CN114360381A CN114360381A (en) | 2022-04-15 |
| CN114360381B true CN114360381B (en) | 2023-11-28 |
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| CN202210012860.1A Active CN114360381B (en) | 2022-01-07 | 2022-01-07 | Flexible display module and mobile terminal |
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