阅读说明：本技术 保护膜、屏体组件和屏体贴合方法 (Protective film, screen assembly and screen laminating method ) 是由 裴军强 张琪 杨硕 古春笑 杨斌 刘苏伟 于 2020-05-28 设计创作，主要内容包括：本申请公开了一种保护膜、屏体组件和屏体贴合方法,所述保护膜用于保护屏体的非显示面一侧,包括：同层且可分离的第一基膜和第二基膜,其中,所述第一基膜用于保护所述屏体的非邦定区,所述第二基膜用于保护所述屏体的邦定区；胶层,位于所述第一基膜和所述第二基膜的一侧,用于将所述第一基膜和所述第二基膜粘附在所述屏体的所述非显示面上。通过上述方式,本申请能够实现在剥离第一基膜时,第二基膜仍然可以保留。(The application discloses protection film, screen body subassembly and screen body laminating method, the protection film is used for protecting non-display surface one side of the screen body, includes: the screen body comprises a first base film and a second base film which are arranged on the same layer and can be separated, wherein the first base film is used for protecting a non-bonding area of the screen body, and the second base film is used for protecting a bonding area of the screen body; and the glue layer is positioned on one side of the first base film and the second base film and is used for adhering the first base film and the second base film to the non-display surface of the screen body. Through the mode, the second base film can still be remained when the first base film is peeled.)

1. A protective film for protecting a non-display surface side of a screen body, comprising:

the screen body comprises a first base film and a second base film which are arranged on the same layer and can be separated, wherein the first base film is used for protecting a non-bonding area of the screen body, and the second base film is used for protecting a bonding area of the screen body;

and the glue layer is positioned on one side of the first base film and the second base film and is used for adhering the first base film and the second base film to the non-display surface of the screen body.

2. The protective film according to claim 1,

the adhesive property of the adhesive layer at the position of the first base film in an initial state is greater than that of the adhesive layer at the position of the second base film, so that the first base film and the second base film are attached to the screen body in the process of attaching the screen body.

3. The protective film according to claim 1,

the glue layer at the position of the first base film has a first viscosity in an initial state and a second viscosity after processing, and the first viscosity is larger than the second viscosity; preferably, the first tackiness is no less than 90% of the tackiness of a guide film used in the conforming of the panel.

4. The protective film according to claim 3,

the glue layer at the position of the second base film has a third tackiness, which is less than the first tackiness and greater than the second tackiness.

5. The protective film according to claim 4,

the first viscosity is greater than or equal to 1500 g/inch; and/or the second viscosity is less than or equal to 2 g/inch; and/or the third viscosity is 10g/inch or more and 20g/inch or less.

6. A screen assembly, comprising:

the screen body comprises a bonding area and a non-bonding area positioned on the periphery of the bonding area;

the protective film of any one of claims 1-5, attached to a non-display side of the panel, wherein the first base film is attached to the non-bonding region through the glue layer, and the second base film is attached to the bonding region through the glue layer.

7. A method of fitting a panel for fitting the panel assembly of claim 6, the method comprising:

attaching a guide film to one side of the screen body, which is provided with the protective film;

pulling the guide film to enable the edge of the screen body to form a preset radian; attaching one side of the display surface of the screen body to a cover plate;

and exposing the non-bonding area of the screen body, and enabling the bonding area of the screen body to be still covered by the second base film.

8. A screen body attaching method according to claim 7,

before the exposing the non-bonding area of the screen body, the method includes: changing the first tackiness of the glue layer at the location of the first base film to a second tackiness, and the glue layer at the location of the second base film having a third tackiness greater than the second tackiness;

the exposing the non-bonding area of the screen body comprises: and removing the guide film, the first base film and the glue layer at the position of the first base film, wherein the first base film is separated from the second base film still on the screen body when being removed.

9. A screen body attaching method according to claim 8,

the guide film comprises a third base film and a bonding layer, the bonding layer is used for attaching the third base film and the protective film which deviates from one side of the screen body, and the bonding layer only covers the first base film.

10. A screen body attaching method according to claim 9,

before the exposing the non-bonding area of the screen body, the method includes: changing the fourth tack of the adhesive layer to a fifth tack.

Technical Field

The application belongs to the technical field of display, and particularly relates to a protective film, a screen body assembly and a screen body attaching method.

Background

In the curved surface attaching process, a guiding film is required to be arranged on one side of the screen body with the protective film so as to perform profiling action on the screen body. Because the viscosity of the protective film is low, in order to reduce the peeling phenomenon of the protective film in the attaching process, the currently adopted mode is that the protective film is firstly removed, then a guide film is arranged on the screen body, and the guide film is removed after the screen body and the cover plate of the cover plate are attached; at the moment, one side of the non-display surface of the screen body is not provided with a protective layer and is in an exposed state, so that the screen body is easily damaged in the processes of detection, transportation and the like.

Disclosure of Invention

The application provides a protection film, a screen body assembly and a screen body attaching method, so that even when a first base film is stripped, a second base film can still be reserved, and the problem of screen body damage is solved.

In order to solve the technical problem, the application adopts a technical scheme that: provided is a protective film for protecting a non-display surface side of a screen body, including: the screen body comprises a first base film and a second base film which are arranged on the same layer and can be separated, wherein the first base film is used for protecting a non-bonding area of the screen body, and the second base film is used for protecting a bonding area of the screen body; and the glue layer is positioned on one side of the first base film and the second base film and is used for adhering the first base film and the second base film to the non-display surface of the screen body.

Wherein the adhesiveness of the glue layer at the position of the first base film in an initial state is greater than that of the glue layer at the position of the second base film, so that the first base film and the second base film are attached to the screen body in the process of attaching the screen body.

Wherein the subbing layer at the position of the first base film has a first tackiness in an initial state and a second tackiness after the processing, the first tackiness being greater than the second tackiness; preferably, the first tackiness is no less than 90% of the tackiness of a guide film used in the conforming of the panel.

Wherein the glue layer at the position of the second base film has a third tackiness, which is less than the first tackiness and greater than the second tackiness.

Wherein the first viscosity is greater than or equal to 1500 g/inch; and/or the second viscosity is less than or equal to 2 g/inch; and/or the third viscosity is 10g/inch or more and 20g/inch or less.

In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a screen assembly comprising: the screen body comprises a bonding area and a non-bonding area positioned on the periphery of the bonding area; the protective film in any of the above embodiments is attached to one side of a non-display surface of the screen body, wherein the first base film is attached to the non-bonding area through the adhesive layer, and the second base film is attached to the bonding area through the adhesive layer.

In order to solve the above technical problem, another technical solution adopted by the present application is: providing a screen body attaching method for attaching the screen body assembly, wherein the screen body attaching method comprises the following steps: attaching a guide film to one side of the screen body, which is provided with the protective film; pulling the guide film to enable the edge of the screen body to form a preset radian; attaching one side of the display surface of the screen body to a cover plate; and exposing the non-bonding area of the screen body, and enabling the bonding area of the screen body to be still covered by the second base film.

Wherein, before exposing the non-bonding area of the screen body, the method comprises: changing the first tackiness of the glue layer at the location of the first base film to a second tackiness, and the glue layer at the location of the second base film having a third tackiness greater than the second tackiness; the exposing the non-bonding area of the screen body comprises: and removing the guide film, the first base film and the glue layer at the position of the first base film, wherein the first base film is separated from the second base film still on the screen body when being removed.

The guide film comprises a third base film and an adhesive layer, and the adhesive layer is used for attaching the third base film and the side, away from the screen body, of the protective film; wherein the adhesive layer covers only the first base film.

Wherein, before exposing the non-bonding area of the screen body, the method comprises: changing the fourth tack of the adhesive layer to a fifth tack.

The beneficial effect of this application is: the protective film is used for protecting one side of a non-display surface of a screen body and specifically comprises a first base film, a second base film and an adhesive layer, wherein the first base film and the second base film are arranged side by side and can be separated; the glue layer may adhere the first base film to the non-bonding region of the panel body and the second base film to the bonding region of the panel body. Because the characteristic of first base film and the separable setting of second base film, when peeling off first base film at the laminating in-process of the screen body or when the laminating of the screen body finishes, can not peel off the second base film in the lump, the bonding district of the screen body still is in the protection state of second base film, and then can reduce bonding district and adhere to the granule and by the probability of fish tail, improves the bonding yield of follow-up bonding district, avoids the damage of the screen body.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic structural diagram of an embodiment of a protective film according to the present application;

FIG. 2 is a cross-sectional view of one embodiment of the protective film of FIG. 1 taken along line A-A;

FIG. 3 is a schematic structural diagram of one embodiment of a screen assembly according to the present application;

FIG. 4 is a schematic flow chart diagram illustrating an embodiment of a screen body attaching method according to the present application;

FIG. 5 is a schematic structural diagram of an embodiment corresponding to step S101 in FIG. 4;

FIG. 6 is a schematic structural diagram of another embodiment corresponding to step S101 in FIG. 4;

fig. 7 is a schematic structural diagram of another embodiment corresponding to step S101 in fig. 4.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an embodiment of a protective film of the present application, and fig. 2 is a schematic cross-sectional diagram of the protective film of fig. 1 taken along a line a-a, wherein the protective film 10 is used for protecting a non-display side of a panel, and includes:

the first base film 100 and the second base film 102 are separated in the same layer, where the first base film 100 is used to protect a non-bonding region of the screen body, and the second base film 102 is used to protect a bonding region of the screen body, and a test circuit, a bonding circuit, and the like may be disposed in the bonding region. In this embodiment, the first base film 100 and the second base film 102 may be made of the same material, and the material may be any one of polyethylene terephthalate PET, polyethylene PE, polyvinyl chloride PVC, polypropylene PP, polystyrene PS, and the like. In this embodiment, the sides of the first and second base films 100 and 102 may have a gap therebetween, or the sides of the first and second base films 100 and 102 may be in contact with each other, but not connected.

And a glue layer 104 on one side of the first and second base films 100 and 102 for adhering the first and second base films 100 and 102 to a non-display surface of the panel body.

In the above design, due to the separable setting characteristics of the first base film 100 and the second base film 102, when the first base film 100 is peeled off in the process of attaching the screen body or when the attaching of the screen body is completed, the second base film 102 is not peeled off together, the bonding area of the screen body is still in the protection state of the second base film 102, and then the probability that particles are attached to the bonding area and are scratched can be reduced, and the bonding yield of the subsequent bonding area is improved.

It can be understood that the orthographic projection of the first base film 100 on the screen body may just cover the bonding region, or may be larger than the bonding region, so as to protect the bonding region more completely, for example, the orthographic projection of the first base film 100 on the screen body is slightly larger than the bonding region, and the size of the projection in each direction is 1-1.5 times that of the bonding region in each direction, or slightly smaller than the bonding region, as long as the first base film 100 and the second base film 102 are on the same layer and are separately disposed, wherein the first base film 100 is used for protecting the non-bonding region of the screen body, and the second base film 102 is used for protecting the bonding region of the screen body, so that independent protection of the bonding region can be achieved, the probability that the bonding region is attached with particles and scratched is reduced, and the bonding yield of the subsequent bonding region is improved.

In addition, in other embodiments, in order to facilitate the storage and operation of the protective film 10, the protective film 10 may further include a release film 106 disposed on a side of the adhesive layer 104 facing away from the first base film 100 and the second base film 102 for protecting the adhesive layer 104 during the operation. When the protective film 10 needs to be attached to the non-display surface of the panel body, the release film 106 may be removed first, and then the adhesive layer 104 may be attached to the panel body.

In one embodiment, the tackiness of the subbing layer 104 at the position of the first base film 100 in an initial state is greater than the tackiness of the subbing layer 104 at the position of the second base film 102, so that the first base film 100 and the second base film 102 are attached to the panel body during the attaching process of the panel body. Generally, a bonding region of the panel is disposed near an edge of the panel, a non-bonding region is disposed on peripheries of at least two oppositely disposed sides of the bonding region, and correspondingly, as shown in fig. 1, at least two oppositely disposed sides of the second base film 102 are peripherally disposed with the first base film 100, for example, three adjacent sides of the second base film 102 in fig. 1 are peripherally disposed with the first base film 100. Since the adhesive layer 104 at the position of the first base film 100 has a large adhesiveness in an initial state, the probability of peeling thereof during the attachment process can be reduced; in addition, in the process of attaching the screen body, the guide film can be pulled along the direction shown by the dotted arrow in fig. 1, and since the second base film 102 is limited by the first base film 100 on both sides in the direction of the dotted arrow, even if the adhesive layer at the position of the second base film 102 has low adhesiveness, the probability of being peeled off in the process of attaching the screen body is low, and the design mode of low adhesiveness at the position of the second base film 102 can reduce the difficulty in subsequently peeling the second base film 102, and reduce the damage to the bonding area circuit when peeling the second base film 102.

Further, the above-mentioned adhesive layer 104 at the position of the first base film 100 has a first tackiness in an initial state and a second tackiness after the treatment, and the first tackiness is greater than the second tackiness, preferably not less than 90% of the tackiness of the guide film used in the process of attaching the screen body. The first adhesion is designed in such a way that the first base film 100 has strong adhesion in the process of fitting the screen body, so as to reduce the probability of peeling the first base film 100; this design mode of second viscidity can reduce the degree of difficulty when getting rid of first base film 100 after the laminating of the screen body for first base film 100 can be got rid of comparatively easily. In this embodiment, the adhesive layer 104 at the position of the first base film 100 may be an ultraviolet-release adhesive, and the like, that is, the adhesive layer 104 at the position of the first base film 100 may be reduced from the first adhesive property to the second adhesive property after being irradiated by ultraviolet light.

Further, the glue layer 104 at the position of the second base film 102 has a third tackiness, which is less than the first tackiness and greater than the second tackiness. This design makes it possible to prevent the second base film 102 from being peeled off when the first base film 100 is peeled off after the end of the panel attachment.

Preferably, the first tack is at least 1500g/inch, e.g., 1700g/inch, 2000g/inch, etc.; and/or the second tack is less than or equal to 2g/inch, e.g., 1.5g/inch, 1g/inch, 0.5g/inch, etc.; and/or the third viscosity is 10g/inch or more and 20g/inch or less, for example, 12g/inch, 15g/inch, 18g/inch, and the like. The first tackiness in the above numerical range may make the probability that the first base film 100 is peeled off during the attaching process of the panel body smaller, and the second tackiness and the third tackiness in the above numerical range may make it easier to peel the first base film 100 and the second base film 102, and the peeling damage to the panel body is smaller.

In this embodiment, the adhesive layer 104 may be formed by a first adhesive layer and a second adhesive layer which are independent, wherein the first adhesive layer corresponds to the position of the first base film 100, and the second adhesive layer corresponds to the position of the second base film 102; the viscosity of the first adhesive layer can be different under different states, and the first adhesive layer can be ultraviolet debonding adhesive and the like; the viscosity of the second adhesive layer in different states can be maintained the same.

Of course, in other embodiments, the adhesive layer 104 may be formed of the same material, for example, the material of the adhesive layer 104 is an ultraviolet debonding adhesive. When the screen body is in the attaching process, the adhesive layer 104 has strong adhesiveness, which may be not less than 90% of the adhesiveness of the guide film used in the attaching process of the screen body, for example, the adhesiveness is greater than or equal to 1500 g/inch; after the attachment of the screen body is finished, the adhesive layers 104 corresponding to the positions of the first base film 100 and the second base film 102 can respectively have different viscosities by controlling different ultraviolet illumination conditions (including ultraviolet illumination time, illumination intensity and the like) by means of a mask; for example, after ultraviolet light irradiation, the tackiness of the adhesive layer 104 at the position corresponding to the first base film 100 is 2g/inch or less, and the tackiness of the adhesive layer 104 at the position corresponding to the second base film 102 is 10g/inch or more and 20g/inch or less. Correspondingly, in this design, at least two oppositely disposed side edges of the bonding region of the screen body are provided with non-bonding regions at the periphery, and the design manner of the protective film 10 may be as shown in fig. 1; alternatively, only one side of the bonding region of the panel may contact the non-bonding region, and at this time, one side of the second base film 102 of the protective film 10 contacts the first base film 100; alternatively, only two adjacent sides of the bonding region of the panel are in contact with the non-bonding region, and two adjacent sides of the second base film 102 of the protective film 10 are in contact with the first base film 100.

In addition, in order to make the first base film 100 and the second base film 102 less influenced by each other when peeled, a non-adhesive layer may be further disposed between the adhesive layer 104 at the position of the first base film 100 and the adhesive layer 104 at the position of the second base film 102, that is, the non-adhesive layer is disposed in the same layer as the adhesive layer 104, and the non-adhesive layer may be correspondingly disposed at the non-bonding region of the panel body, and may have a thickness as small as possible. When the first base film 100 is peeled off, the non-adhesive layer may remain and be adhered to the adhesive layer 104 positioned at the position of the second base film 102. When the second base film 102 is to be removed subsequently, it may be removed together with the second base film 102.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a panel assembly 20 according to an embodiment of the present application, which includes a panel 200 and a protective film 202 in any of the above embodiments; the screen body 200 may be an OLED screen body, a Micro-OLED screen body, or the like, the screen body 200 includes a bonding area 2000 and a non-bonding area 2002 located at the periphery of the bonding area 2000, the protective film 202 is attached to one side of the non-display surface of the screen body 200, the first base film 2020 in the protective film 202 is attached to the non-bonding area 2002 through a glue layer 2022, and the second base film 2024 in the protective film 202 is attached to the bonding area 2000 through a glue layer 2022.

Referring to fig. 4, fig. 4 is a schematic flow chart of an embodiment of a screen body attaching method according to the present application, where the screen body attaching method may attach the screen body assembly 20 mentioned above, and the screen body attaching method specifically includes:

s101: the guide film 30 is attached to the side of the panel 200 having the protective film 202.

Specifically, as shown in fig. 5, fig. 5 is a schematic structural diagram of an embodiment corresponding to step S101 in fig. 4. The guide film 30 includes a third base film 300 and an adhesive layer 302, and the adhesive layer 302 is used to attach the third base film 300 and the side of the protective film 202 facing away from the screen body 200. The third base film 300 may be made of any one of polyethylene terephthalate (PET), Polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), Polystyrene (PS), and the like. In addition, in the step S101, the protective film 202 may include a first base film 2020, a second base film 2024 and an adhesive layer 2022, and the adhesive layer 302 on the guide film 30 may be directly attached to the protective film 202 and only cover the first base film 2020, so that when the guide film 30 is subsequently removed, the guide film 30 can drive the first base film 2020 to remove without driving the second base film 2024 to remove.

Of course, in other embodiments, as shown in fig. 6, fig. 6 is a schematic structural diagram of another embodiment corresponding to step S101 in fig. 4. In the step S101, the adhesive layer at the position of the first base film and the first base film in the protective film 202a may be removed first, and in this case, the protective film 202a only includes the second base film 2024a and the adhesive layer 2022a at the position of the second base film 2024 a; then, the guide film 30a is attached to the panel 200a, and at this time, the adhesive layer 302a of the guide film 30a may only cover the non-bonding area of the panel 200 a; preferably, the thickness of the adhesive layer 302a at this time may be the same as the sum of the thicknesses of the second base film 2024a and the glue layer 2022a at the corresponding position in the protective film 202 a.

Alternatively, as shown in fig. 7, fig. 7 is a schematic structural diagram of another embodiment corresponding to step S101 in fig. 4. In the step S101, the first base film in the protective film 202b may be removed, and in this case, the protective film 202b may include the second base film 2024b and the glue layer 2022b covering the entire screen body 200 b; then, the guide film 30b is attached to the panel 200b, and at this time, the adhesive layer 302b of the guide film 30b may only cover the adhesive layer 2022b corresponding to the non-bonding area of the panel 200 b; preferably, the thickness of the adhesive layer 302b at this time may be the same as the thickness of the second base film 2024b in the protective film 202 b.

S102: the guide film 30 is pulled to form the edge of the panel 200 into a predetermined arc.

Specifically, as shown in fig. 5, the guide film 30 may be pulled toward the panel 200 so that the edge of the panel 200 forms a predetermined arc.

S103: one side of the display surface of the screen body 200 is attached to the cover plate.

Specifically, the edge curvature of the cover plate may be the same as the edge curvature of the panel 200 in step S102, and an adhesive layer is disposed on the side of the cover plate facing the display surface of the panel 200 or the side of the display surface of the panel 200 facing the cover plate, so that the panel 200 and the cover plate can be attached through the adhesive layer.

S104: the non-bonding region of the panel 200 is exposed, and the bonding region of the panel 200 is still covered by the second base film 2024.

Specifically, for the structure in fig. 5, the specific implementation process of the step S104 may be: the guide film 30, the first base film 2020, and the glue layer 2022 at the position of the first base film 2020 may be removed, and the first base film 2020 is separated from the second base film 2024 still on the panel 200 when removed.

In the present embodiment, at the time of the above-described steps S101 and S102, the adhesive layer 2022 located at the position of the first base film 2020 has a first tackiness which may be not less than 90% of the viscosity of the adhesive layer 302 in the guide film 30, so that the probability of peeling of the first base film 2020 during the attaching process is reduced. In order to make it easier to expose the non-bonding area of the panel 200, step S104 includes: the first tackiness of the glue layer 2022 at the position of the first base film 2020 is changed to be lowered to the second tackiness, and the glue layer 2022 at the position of the second base film 2024 has a third tackiness greater than the second tackiness.

Further, in order to remove the guide film 30 by peeling, the first base film 2020 and the adhesive layer 2022 at the position of the first base film 2020 can be removed together, and the adhesive layer 302 of the guide film 30 may have a fourth tackiness at the above steps S101 and S102. Before the step S104, the method further includes: the fourth tack of the adhesive layer 302 is changed so that its tack rises to the fifth tack. In this embodiment, the bonding layer 302 may be an ultraviolet curing adhesive; when the adhesive layer 302 is an ultraviolet curing adhesive and the adhesive layer 2022 at the position of the first base film 2020 is an ultraviolet debonding adhesive, ultraviolet irradiation may be performed from one side of the guide film 30, so that the adhesiveness of the adhesive layer 302 and the adhesive layer 2022 at the position of the first base film 2020 is changed at the same time, thereby reducing the complexity of the process.

Similarly, for the structure in fig. 6, the adhesive layer 302a in the guide film 30a may also be treated in an adhesive manner similar to that in the above-described embodiment; with the structure in fig. 7, the adhesive layer 302b in the guide film 30b and the glue layer 2022b at the position of the adhesive layer 302b may also be subjected to a similar manner to the adhesion treatment in the above-described embodiment.

In other embodiments, after the screen body profiling, bonding, detecting, and other steps are performed, the second base film 2024 and the adhesive layer 2022 at the corresponding position in fig. 5 may be removed, and since the adhesive layer 2022 at the position of the second base film 2024 has low viscosity, the film tearing process is easy, and the circuit in the bonding area is less affected; and because the bonding area is covered by the second base film 2024 before bonding, the probability of scratching and particle attachment of the bonding area can be reduced in the process of process circulation, and the bonding yield is improved.

In a specific application scenario, when the scheme in fig. 5 is compared with comparative example 1 and comparative example 2, it is found that the scheme in fig. 5 improves the fitting yield of the screen body by 10% compared with comparative example 1; the scheme in fig. 5 improves bonding yield by 10% over comparative example 2. In comparative example 1, a guide film was attached to an existing protective film, and then the protective film was attached, and the adhesive layer of the existing protective film was less adhesive than the adhesive layer of the guide film and was easily peeled off during the attachment of the screen body. Comparative example 2 the existing protective film was removed and the guide film was directly attached to the screen. Because the viscidity of guide film is stronger, can influence the circuit in bonding district at the removal guide film in-process, and then reduce the bonding yield.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.