Screen protection film

Abstract

The screen protection film comprises a film body, a light-transmitting layer, a first protection layer and a second protection layer, the film body comprises an upper surface and a lower surface which are oppositely arranged in the thickness direction, the light-transmitting layer is arranged on the upper surface of the film body, the first protection layer is located on the side, away from the film body, of the light-transmitting layer, and the second protection layer is located on the side, away from the film body, of the light-transmitting layer. The first protective layer is located on one side of the lower surface of the film body and is bonded with the light-transmitting layer through a first bonding layer, the second protective layer is located on one side of the lower surface of the film body and is bonded with the lower surface of the film body through a second bonding layer, and the surface area of the first bonding layer is smaller than that of the light-transmitting layer, so that a hollow area is formed between the light-transmitting layer and the first protective layer; when the projection with the poor appearance is in the hollow-out area, the difference between the refractive index of air in the hollow-out area and the refractive index of the light-transmitting layer is large, so that a user can observe the poor appearance.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a screen protective film. Background Art

[0002] The screen of an electronic device usually needs to be protected by applying a screen protector. The screen protector can be provided with an anti-reflective coating (AR) to reduce screen reflection. AR coatings are prone to produce poor appearance, such as color dots, color spots, rainbow patterns, blue patterns, etc. When AR coatings have poor appearance, there is a risk that they cannot be directly observed with the naked eye, resulting in the AR coating with poor appearance being installed on the whole machine along with the screen protector, affecting the quality of the whole machine. Utility Model Content

[0003] In view of this, an embodiment of the present application provides a screen protective film to solve the technical problem in the prior art that the AR coating in the screen protective film has a poor appearance and cannot be directly observed with the naked eye.

[0004] An embodiment of the present application provides a screen protective film, which includes: a film body, the film body including an upper surface and a lower surface arranged opposite to each other along a first direction; a light-transmitting layer, the light-transmitting layer being arranged on the upper surface of the film body; a first protective layer, the first protective layer being located on a side of the light-transmitting layer away from the film body, and the first protective layer and the light-transmitting layer being bonded to each other via a first adhesive layer; a second protective layer, the second protective layer being located on a side of the lower surface of the film body, and the second protective layer and the lower surface of the film body being bonded to each other via a second adhesive layer; wherein the surface area of ​​the first adhesive layer is smaller than the surface area of ​​the light-transmitting layer, so that there is a hollow area between the light-transmitting layer and the first protective layer.

[0005] In this embodiment, in a plane perpendicular to the first direction, the surface area of ​​the first adhesive layer can be set to be smaller than the surface area of ​​the light-transmitting layer, so that in addition to the first adhesive layer, there is also a hollow area between the light-transmitting layer and the first protective layer. When a projection with poor appearance is projected in the hollow area, the user can observe the poor appearance due to the large difference between the refractive index of the air in the hollow area and the refractive index of the light-transmitting layer.

[0006] In a specific embodiment, the first adhesive layer surrounds the hollow area.

[0007] In this embodiment, the first adhesive layer surrounds the hollow area, which can improve the sealing between the first protective layer and the light-transmitting layer, reduce the entry of dust and other impurities into the space between the first protective layer and the light-transmitting layer, and reduce the risk of damage to the light-transmitting layer. In addition, when the hollow area is surrounded by the first adhesive layer, it is convenient to increase the area of ​​the hollow area, so that it is easier for users to identify screen protective films with poor appearance.

[0008] In a specific embodiment, the first protective layer has a first outer edge, the light-transmitting layer has a second outer edge, and the first outer edge and the second outer edge are bonded together by the first adhesive layer.

[0009] In this embodiment, the first adhesive layer is connected to the first outer edge of the first protective layer. Since the first outer edge of the first protective layer is easily rubbed during the production and transportation of the screen protective film, the first outer edge of the first protective layer is more likely to be lifted up under the action of external force. Therefore, by making the first adhesive layer connected to the first outer edge of the first protective layer, the connection reliability between the first protective layer and the light-transmitting layer can be further improved, and the risk of the first outer edge of the first protective layer lifting up can be reduced.

[0010] In a specific embodiment, at least a portion of the hollow area is not surrounded by the first adhesive layer.

[0011] In this embodiment, at least part of the hollow area is not surrounded by the first adhesive layer, that is, at least part of the hollow area may be located on the side of the first adhesive layer facing the second outer edge.

[0012] In a specific embodiment, the hollow area includes at least a first hollow area and a second hollow area, the first hollow area is surrounded by the adhesive layer, and the second hollow area is located on the outer side of the first adhesive layer away from the first hollow area.

[0013] In this embodiment, there are a first hollow area and a second hollow area between the first protective layer and the light-transmitting layer, wherein the first hollow area is located in the space surrounded by the first adhesive layer, and the second hollow area is located outside the first adhesive layer, that is, the first hollow area and the second hollow area are separated by the first adhesive layer. In this embodiment, when there is a poor appearance within the projection range of the first hollow area or the second hollow area, the user can observe it, thereby further facilitating the user to identify a screen protective film with a poor appearance.

[0014] In a specific embodiment, the minimum distance between the third outer edge of the first adhesive layer and the first outer edge of the first protective layer is L1, and L1 satisfies 3mm≤L1≤7mm.

[0015] In this embodiment, L1 should not be too large or too small. When it is too large, the distance between the third outer edge of the first adhesive layer and the first outer edge of the first protective layer is large, which reduces the connection reliability between the first outer edge of the first protective layer and the light-transmitting layer, and easily causes the first outer edge of the first protective layer to warp up under the action of external force during the transportation of the screen protective film; when it is too small, the distance between the third outer edge of the first adhesive layer and the first outer edge of the first protective layer is small, which reduces the area of ​​the second hollow area and affects the user's recognition of the appearance state within the projection range of the second hollow area. Therefore, when L1 satisfies 3mm≤L1≤7mm, the connection reliability between the first outer edge of the first protective layer and the light-transmitting layer is high, and it is convenient for the user to observe the appearance state within the projection range of the second hollow area.

[0016] In a specific embodiment, the first adhesive layer includes at least two first connecting segments extending along the second direction, and / or the first adhesive layer includes at least two second connecting segments extending along the third direction.

[0017] In the first specific embodiment, the first adhesive layer is an annular structure, that is, the first adhesive layer includes two first connecting segments and two second connecting segments, which are connected end to end to form an annular first adhesive layer and the above-mentioned hollow area. That is, the first outer edge of the first protective layer and the second outer edge of the light-transmitting layer are connected by the first connecting segment extending along the second direction, and are also connected by the second connecting segment extending along the third direction, which can improve the connection reliability between the first protective layer and the light-transmitting layer, reduce the risk of the first outer edge of the first protective layer being lifted up under the action of external force during the transportation of the screen protective film, and keep the first protective layer flat, and can also improve the sealing between the first protective layer and the light-transmitting layer, reduce the entry of impurities such as dust into the space between the first protective layer and the light-transmitting layer, and reduce the risk of damage to the light-transmitting layer. Moreover, when the hollow area is surrounded by the first adhesive layer, it is convenient to increase the area of ​​the hollow area, so that it is easier for users to identify screen protective films with poor appearance.

[0018] In a second specific embodiment, the first adhesive layer includes at least two second connection segments extending along the third direction, and the two second connection segments respectively connect the first outer edge of the first protective layer along the second direction and the second outer edge of the light-transmitting layer along the second direction, which can improve the connection reliability between the first protective layer and the light-transmitting layer, reduce the risk of the first outer edge of the first protective layer being lifted up under the action of external force during the transportation of the screen protective film, and keep the first protective layer flat. Moreover, the hollow area is located on the side of the first adhesive layer away from the second outer edge, which is convenient for increasing the area of ​​the hollow area, thereby making it easier for users to identify screen protective films with poor appearance.

[0019] In a third specific embodiment, the first adhesive layer includes at least two first connecting segments extending along the second direction, and the two first connecting segments respectively connect the first outer edge of the first protective layer along the second direction and the second outer edge of the light-transmitting layer along the second direction, which can improve the connection reliability between the first protective layer and the light-transmitting layer, reduce the risk of the first outer edge of the first protective layer being lifted up under the action of external force during the transportation of the screen protective film, and keep the first protective layer flat. Moreover, the hollow area is located on the side of the first adhesive layer away from the second outer edge, which is convenient for increasing the area of ​​the hollow area, thereby making it easier for users to identify screen protective films with poor appearance.

[0020] In a specific embodiment, the first adhesive layer further includes at least one third connecting segment; the third connecting segment is located in the area enclosed by the first connecting segment and / or the second connecting segment.

[0021] In the first specific embodiment, one or more third connecting segments can also be arranged in the area enclosed by the first connecting segment and the second connecting segment, so that the first outer edge of the first protective layer and the second outer edge of the light-transmitting layer are connected by the first connecting segment extending along the second direction, and are also connected by the second connecting segment extending along the third direction, and the middle part of the first protective layer and the middle part of the light-transmitting layer are connected by the third connecting segment, thereby being able to further improve the connection reliability between the light-transmitting layer and the first protective layer.

[0022] In a second specific embodiment, the first adhesive layer includes at least two second connecting segments extending along a third direction. A third connecting segment may be arranged between the two second connecting segments. The third connecting segment may be connected to the second connecting segments or may not be connected to the second connecting segments, thereby further improving the connection reliability between the first protective layer and the light-transmitting layer.

[0023] In a third specific embodiment, the first adhesive layer includes at least two first connecting segments extending along the second direction. A third connecting segment may be arranged between the two first connecting segments. The third connecting segment may be connected to the first connecting segment or may not be connected to the first connecting segment, thereby further improving the connection reliability between the first protective layer and the light-transmitting layer.

[0024] In a specific embodiment, the first adhesive layer is a continuous structure.

[0025] In this embodiment, the first adhesive layer is made into a continuous structure, which can improve the connection reliability between the first protective layer and the light-transmitting layer.

[0026] In a specific embodiment, the first adhesive layer includes a plurality of separately arranged structures and is connected to corners of the first protective layer.

[0027] In this embodiment, the first adhesive layer is located at the four corners of the first protective layer, so that the four corners of the first protective layer and the four corners of the light-transmitting layer are bonded by the first adhesive layer. On the basis of ensuring the reliability of the connection between the first protective layer and the light-transmitting layer, the hollow area formed is larger, and the observable area of ​​the light-transmitting layer is larger, thereby improving the observation effect of the appearance state of the light-transmitting layer.

[0028] In a specific embodiment, the surface area of ​​the first adhesive layer is S1, the surface area of ​​the first protective layer is S2, and S1 / S2 satisfies 0.1≤S1 / S2≤0.15.

[0029] In this embodiment, the ratio of S1 / S2 should not be too large or too small. When it is too small, the bonding area between the first adhesive layer and the first protective layer is too small, which reduces the connection reliability between the first protective layer and the light-transmitting layer. During production or transportation, the first protective layer and the light-transmitting layer are prone to cracking. When it is too large, the surface area of ​​the hollow region between the light-transmitting layer and the first protective layer is too small, which reduces the observable area of ​​the light-transmitting layer and affects the confirmation of the appearance of the light-transmitting layer. Therefore, when the ratio of S1 / S2 satisfies 0.1≤S1 / S2≤0.15, the observable area of ​​the light-transmitting layer is larger on the basis of ensuring the connection reliability between the first protective layer and the light-transmitting layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of an electronic device in a specific embodiment;

[0031] Figure 2 is a schematic diagram of a laminated structure of a screen protection film in a specific embodiment;

[0032] Figure 3 for Figure 2 Schematic diagram of the stacking of the screen protector when peeling off the protective layer;

[0033] Figure 4 for Figure 3 The schematic diagram of the structure of the screen protective film when it is attached to the screen of the electronic device;

[0034] Figure 5 This is a schematic structural diagram of a screen protection film provided by the present application in a specific embodiment;

[0035] Figure 6 for Figure 5 A bottom view of the first adhesive layer in a specific embodiment;

[0036] Figure 7 A bottom view of the first adhesive layer in the screen protection film provided by the present application in another specific embodiment;

[0037] Figure 8 for Figure 5 A bottom view of the first adhesive layer in another specific embodiment;

[0038] Fig. 9 A bottom view of the first adhesive layer in the screen protection film provided by the present application in another specific embodiment;

[0039] Fig.10 This is a schematic structural diagram of another specific embodiment of the screen protection film provided by the present application;

[0040] Fig.11 for Fig.10 A bottom view of the first adhesive layer in a specific embodiment;

[0041] Fig.12 It is a bottom view of the first adhesive layer in the screen protection film provided by the present application in yet another specific embodiment.

[0042] Description of reference numerals:

[0043] 1- Electronic equipment;

[0044] 11-Screen protector;

[0045] 111-membranous body;

[0046] 111a-upper surface;

[0047] 111b - lower surface;

[0048] 112-light-transmitting layer;

[0049] 113-protective layer;

[0050] 113a-first protective layer;

[0051] 113b- second protective layer;

[0052] 114- first adhesive layer;

[0053] 114a-first connecting section;

[0054] 114b- second connecting section;

[0055] 114c-third connecting section;

[0056] 115- second adhesive layer;

[0057] 116 - outer end;

[0058] 117-hollow area;

[0059] 117a-first hollow area;

[0060] 117b- second hollow area;

[0061] 118 - first outer edge;

[0062] 119 - second outer edge;

[0063] 120 - third outer edge;

[0064] 12-Screen.

[0065] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0066] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0067] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0068] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that a component is connected to another component "upper" or "lower", it can not only be directly connected to another component "upper" or "lower", but also indirectly connected to another component "upper" or "lower" through an intermediate component.

[0069] like Figure 1 As shown, Figure 1 1 is a schematic diagram of the structure of an electronic device 1 in a specific embodiment. The electronic device 1 includes, for example, a mobile phone, a tablet computer, a personal digital assistant (PDA), a laptop computer, a car computer, a foldable display device, a foldable display screen, a wearable device, and the like. The embodiment of the present application does not impose any special restrictions on the specific form of the above-mentioned electronic device 1. For the convenience of explanation, the following description is made by taking the electronic device 1 as an example of a mobile phone. The electronic device 1 of the present application is introduced in the following specific embodiment.

[0070] like Figure 1As shown, a screen protective film 11 for protecting the screen is installed on the screen of the electronic device 1. Figure 2 As shown, Figure 2 1 is a schematic diagram of the laminated structure of the screen protective film 11 in a specific embodiment. The screen protective film 11 generally includes a film body 111 and a protective layer 113 connected to both sides of the film body 111. The protective layer 113 is used to protect the film body 111 from direct contact with the outside world to prevent the film body 111 from being damaged during production or transportation. The protective layer 113 includes a first protective layer 113a and a second protective layer 113b. The first protective layer 113a and the second protective layer 113b are respectively located on different sides of the film body 111 along the first direction X, and protect the film body 111 from both sides of the film body 111. The film body 111 has an upper surface 111a and a lower surface 111b along the first direction X. The upper surface 111a is the side facing the user when the electronic device 1 is in use, and the lower surface 111b is the side facing away from the user when the electronic device 1 is in use, that is, the lower surface 111b is the side facing the inside of the electronic device 1. The first direction X can be the thickness direction of the screen protective film 11.

[0071] In a specific embodiment, the first protective layer 113a may be a polyester film (PET), which has good tensile strength and impact strength, and can improve the protection of the film body 111. The second protective layer 113b may be an organic silicon film, which has good adhesion, and can improve the connection reliability between the film body 111 and the second protective layer 113b.

[0072] In order to reduce the reflection effect of the screen, a light-transmitting layer is usually added to the screen protective film. Figure 2 In the illustrated embodiment, the light-transmitting layer 112 may be disposed on the upper surface 111a of the film body 111. The light-transmitting layer 112 can increase the light transmittance of the screen and reduce the reflective effect. Along the first direction X, the first protective layer 113a is disposed on the side of the light-transmitting layer 112 that is away from the film body 111, and the second protective layer 113b is disposed on the side of the lower surface 111b of the film body 111. The bottom surface of the first protective layer 113a is provided with a first adhesive layer 114, and along the first direction X, the first protective layer 113a is connected to the light-transmitting layer 112 through the first adhesive layer 114; the lower surface 111b of the film body 111 is also provided with a second adhesive layer 115, and along the first direction X, the second protective layer 113b is connected to the lower surface 111b of the film body 111 through the second adhesive layer 115.

[0073] During the processing, the light-transmitting layer 112 is prone to have poor appearance, such as color spots, color spots, rainbow patterns, blue patterns, etc. The cause of such poor appearance may be the difference in film thickness in any area of ​​the light-transmitting layer 112 or the presence of foreign matter inside, which makes the area unable to normally exhibit the anti-reflection effect, and thus presents a poor appearance. Figure 2 The dotted line in the figure shows the poor appearance area of ​​the light-transmitting layer 112. After the first protective layer 113a is connected to the light-transmitting layer 112 through the first adhesive layer 114, the refractive index of the first adhesive layer 114 is close to that of the light-transmitting layer 112, so that the overall anti-reflection effect of the light-transmitting layer 112 cannot be achieved, so that the naked eye cannot directly observe the appearance of the light-transmitting layer 112 through the first adhesive layer 114. Figure 2 The screen protector with poor appearance is a normal screen protector.

[0074] When the screen protective film 11 is applied to the screen of the electronic device, the protective layers on both sides need to be peeled off to form a screen protective film 11. Figure 3 The structure shown, Figure 3 for Figure 2 Schematic diagram of the stacking of protective layers when peeling off the screen protective film 11 in FIG. When peeling off the first protective layer, since the first adhesive layer is arranged on the first protective layer, it can be peeled off along with the first protective layer, thereby preventing the first adhesive layer from remaining on the upper surface of the light-transmitting layer 112. When peeling off the second protective layer, since the second adhesive layer 115 is arranged on the film body 111, after peeling off the second protective layer, the second adhesive layer 115 is still arranged on the lower surface of the film body 111.

[0075] In a specific embodiment, the first adhesive layer 114 may be a pressure sensitive adhesive (PSA). The PSA pressure sensitive adhesive has good transparency and should not affect the overall transparency of the screen protective film 11. The PSA pressure sensitive adhesive has good viscosity and can improve the connection reliability between the first protective layer 113 and the light-transmitting layer 112, thereby avoiding cracking during production or transportation. At the same time, the PSA pressure sensitive adhesive has a large cohesive force and is not prone to adhesive layer damage. The PSA pressure sensitive adhesive is disposed on the first protective layer 113a. When the first protective layer 113a is peeled off, the PSA pressure sensitive adhesive is prone to interface damage, that is, the PSA pressure sensitive adhesive can be peeled off from the light-transmitting layer 112 as a whole, thereby reducing colloid residue.

[0076] In a specific embodiment, the second adhesive layer 115 may be an optically clear adhesive (OCA). OCA optical adhesive has the characteristics of high clarity, strong light transmittance and good adhesion. On the premise of meeting the use requirements of the film body 111, it can improve the connection reliability between the second protective layer 113b and the lower surface 111b of the film body 111, and avoid the second protective layer 113a from cracking during transportation.

[0077] Please refer to Figure 4 , Figure 4 for Figure 3 The schematic diagram of the structure of the screen protective film shown is attached to the screen 12 of the electronic device 1. The second adhesive layer 115 on the film body 111 is directly attached to the screen 12. In a specific embodiment, the light-transmitting layer 112 can be an AR coating, which is an optical coating with a thickness of only a few hundred nanometers, and can reduce light reflection by increasing the transmittance of light. When applied to the screen of the electronic device 1, it can reduce the reflection of the electronic device 1 when used under light, improve the use effect, and the AR coating has strong wear resistance, which can extend the service life of the screen protective film 11.

[0078] After the screen protective film is pasted on the screen 12, the appearance of the light-transmitting layer 112 is poor (such as Figure 4 The problem (as shown in the dashed box) still exists, which results in the screen protective film 11 with the light-transmitting layer 112 having a poor appearance being installed on the screen 12 of the electronic device 1, thereby resulting in the screen 12 of the electronic device 1 having a poor appearance quality.

[0079] Specifically, the present application can add a structure with a large difference in refractive index between the light-transmitting layer 112 and the first adhesive layer 114 of the screen protective film 11, so that when the light-transmitting layer 112 has a poor appearance, the poor appearance can be observed through the first adhesive layer 114, thereby reducing the risk of sticking the screen protective film 11 with poor appearance on the screen 12 of the electronic device 1, resulting in poor appearance quality of the screen 12 of the electronic device 1.

[0080] Specifically, if Figure 5 As shown, Figure 5 1 is a schematic diagram of the structure of the screen protection film 11 provided in the present application in a specific embodiment. In a plane perpendicular to the first direction X, the surface area of ​​the first adhesive layer 114 can be set to be smaller than the surface area of ​​the light-transmitting layer 112, so that in addition to the first adhesive layer 114, there is also a hollow area 117 between the light-transmitting layer 112 and the first protective layer 113a. When the appearance is poor (such as Figure 5 When the projection of the image (as shown by the middle dotted line) is projected into the hollow area 117, the user can observe the poor appearance due to the large difference between the refractive index of the air in the hollow area 117 and the refractive index of the light-transmitting layer.

[0081] like Figure 5 As shown, in the screen protection film 11 provided in the embodiment of the present application, the projection area of ​​the first adhesive layer 114 along the first direction X is smaller than the projection area of ​​the light-transmitting layer 112 along the first direction X. Even if a hollow area 117 can be formed between the first protective layer 113a, the light-transmitting layer 112 and the first adhesive layer 114, after the first protective layer 113a is connected to the light-transmitting layer 112 through the first adhesive layer 114, the anti-reflection effect of the light-transmitting layer 112 is significant due to the large difference in refractive index between the air in the hollow area 117 and the light-transmitting layer 112, so that the user can directly observe the appearance of the light-transmitting layer 112 at the corresponding position of the hollow area 117. Figure 5 The dotted line in the figure shows the poor appearance area of ​​the light-transmitting layer 112. When the poor appearance area appears in the hollow area 117, it is possible to detect and identify the poor appearance area with the naked eye, which is convenient for users to identify the screen protective film 11 with poor appearance and reduce the risk of attaching the screen protective film 11 with poor appearance to the screen of the electronic device, resulting in poor appearance of the screen of the electronic device.

[0082] In a specific embodiment, Figure 5 As shown, in a plane perpendicular to the first direction X, the surface area of ​​the light-transmitting layer 112 is substantially the same as the surface area of ​​the film body 111 , so that after it is connected to the screen of an electronic device, all parts of the screen are covered with the light-transmitting layer 112 , thereby improving the overall anti-reflection effect of the screen.

[0083] It can be understood that the hollow area 117 can be located at any position between the first protective layer 113a and the light-transmitting layer 112. The position of the hollow area 114c is described in detail below.

[0084] Figure 5 In the illustrated embodiment, the hollow area 117 is surrounded by the first adhesive layer 114. In this embodiment, the first adhesive layer 114 is connected to the first outer edge 118 of the first protective layer 113a. Since the first outer edge 118 of the first protective layer 113a is easily rubbed during the production and transportation of the screen protective film 11, the first outer edge 118 of the first protective layer 113a is more likely to be lifted up under the action of external force. Therefore, the first adhesive layer 114 is connected to the first outer edge 118 of the first protective layer 113a, which can further improve the connection reliability between the first protective layer 113a and the light-transmitting layer 112 and reduce the risk of the first outer edge 118 of the first protective layer 113a lifting up.

[0085] Please refer to Figure 6 , Figure 6 for Figure 5A bottom view of the first adhesive layer 114 in a specific embodiment. In this embodiment, the first adhesive layer is an annular structure, that is, the first adhesive layer includes two first connecting segments 114a and two second connecting segments 114b, which are connected end to end to form an annular first adhesive layer and the hollow area 117. Please also refer to Figure 5 That is, the first outer edge 118 of the first protective layer 113a and the second outer edge 119 of the light-transmitting layer 112 are connected by the first connecting segment 114a extending along the second direction Y, and are also connected by the second connecting segment 114b extending along the third direction Z, which can improve the connection reliability between the first protective layer 113a and the light-transmitting layer 112, reduce the risk of the first outer edge 118 of the first protective layer 113a being lifted up under the action of external force during the transportation of the screen protective film 11, and keep the first protective layer 113a flat, and can also improve the sealing between the first protective layer 113a and the light-transmitting layer 112, reduce the entry of dust and other impurities into the space between the first protective layer 113a and the light-transmitting layer 112, and reduce the risk of damage to the light-transmitting layer 112. Moreover, when the hollow area 117 is surrounded by the first adhesive layer 114, it is convenient to increase the area of ​​the hollow area 117, so that it is easier for users to identify the screen protective film 11 with poor appearance.

[0086] The second direction Y may be the width direction of the screen protective film 11, and the third direction Z may be the length direction of the screen protective film 11. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0087] Figure 6 In the illustrated embodiment, the first connecting segment 114a and the second connecting segment 114b form a rectangular structure, thereby matching the first protective layer and the light-transmitting layer.

[0088] in addition, Figure 6 In the illustrated embodiment, the first adhesive layer 114 encloses a hollow area 117 . In other embodiments, the first adhesive layer may also enclose a plurality of mutually spaced areas.

[0089] Please refer to Figure 7 , Figure 7 This is a bottom view of the first adhesive layer in the screen protective film provided by the present application in another specific embodiment. One or more third connecting segments 114c can also be set in the area surrounded by the first connecting segment 114a and the second connecting segment 114b, so that the first outer edge of the first protective layer and the second outer edge of the light-transmitting layer are connected by the first connecting segment 114a extending along the second direction Y, and are also connected by the second connecting segment 114b extending along the third direction Z, and the middle part of the first protective layer and the middle part of the light-transmitting layer are connected by the third connecting segment 114c, so that the connection reliability between the light-transmitting layer and the first protective layer can be further improved.

[0090] The third connecting segment 114c can divide the hollow area 117 into at least two areas. Figure 7 In the illustrated embodiment, the hollow region 117 includes a first hollow region 117a and a second hollow region 117b, and the first hollow region 117a and the second hollow region 117b are separated by a third connecting segment 114c. At the same time, the first connecting segment 114a and the second connecting segment 114b form a rectangular structure, and the third connecting segment 114c forms a rectangular structure, thereby further improving the connection reliability between the first protective layer and the light-transmitting layer.

[0091] Please refer to Figure 8 , Figure 8 for Figure 5 A bottom view of the first adhesive layer 114 in another specific embodiment. In this embodiment, the first adhesive layer includes at least two second connecting segments 114b extending along the third direction Z, and the two second connecting segments 114b respectively connect the first outer edge 118 of the first protective layer along the second direction Y and the second outer edge of the light-transmitting layer along the second direction Y, which can improve the connection reliability between the first protective layer 113a and the light-transmitting layer, reduce the risk of the first outer edge 118 of the first protective layer being lifted up under the action of external force during the transportation of the screen protective film, and keep the first protective layer 113a flat. Moreover, the hollow area 117 is located on the side of the first adhesive layer away from the second outer edge, which is convenient for increasing the area of ​​the hollow area 117, thereby making it easier for users to identify screen protective films with poor appearance.

[0092] Among them, a third connecting segment (not shown in the figure) can be further arranged between the two second connecting segments, and the third connecting segment can be connected to the second connecting segment or not, thereby further improving the connection reliability between the first protective layer and the light-transmitting layer.

[0093] Please refer to Fig. 9 , Fig. 9 This is a bottom view of the first adhesive layer in the screen protective film provided by the present application in another specific embodiment. In this embodiment, the first adhesive layer includes at least two first connecting segments 114a extending along the second direction Y. The two first connecting segments 114a respectively connect the first outer edge 118 of the first protective layer along the second direction Y and the second outer edge of the light-transmitting layer along the second direction Y, which can improve the connection reliability between the first protective layer and the light-transmitting layer, reduce the risk of the first outer edge 118 of the first protective layer being lifted up under the action of external force during the transportation of the screen protective film, and keep the first protective layer flat. Moreover, the hollow area 117 is located on the side of the first adhesive layer away from the second outer edge, which is convenient for increasing the area of ​​the hollow area 117, thereby making it easier for users to identify screen protective films with poor appearance.

[0094] Among them, a third connecting segment (not shown in the figure) can be further arranged between the two first connecting segments, and the third connecting segment can be connected to the first connecting segment or not, thereby further improving the connection reliability between the first protective layer and the light-transmitting layer.

[0095] In other embodiments, at least part of the hollow area is not surrounded by the first adhesive layer, that is, at least part of the hollow area may be located on a side of the first adhesive layer facing the second outer edge.

[0096] Please refer to Fig.10 and Fig.11 , Fig.10 This is a schematic structural diagram of the screen protection film provided in the present application in another specific embodiment. Fig.11 for Fig.10 FIG. 1 is a bottom view of the first adhesive layer 114. Fig.10 As shown, there is a first hollow area 117a and a second hollow area 117b between the first protective layer 113a and the light-transmitting layer 112, wherein the first hollow area 117a is located in the space surrounded by the first adhesive layer 114, and the second hollow area 117b is located outside the first adhesive layer 114, that is, the first hollow area 117a and the second hollow area 117b are separated by the first adhesive layer 114. In this embodiment, when there is a poor appearance (such as Fig.10 When the screen protective film 11 is not in good appearance, the user can observe it, thereby further facilitating the user to identify the screen protective film 11 with poor appearance.

[0097] The minimum distance L1 between the third outer edge 120 of the first adhesive layer 114 and the first outer edge 118 of the first protective layer 113a satisfies 3mm≤L1≤7mm. L1 should not be too large or too small. When L1 is too large, the distance between the third outer edge 120 of the first adhesive layer 114 and the first outer edge 118 of the first protective layer 113a is large, which reduces the connection reliability between the first outer edge 118 of the first protective layer 113a and the light-transmitting layer 112, and easily causes the first outer edge 118 of the first protective layer 113a to warp up under the action of external force during the transportation of the screen protective film 11; when L1 is too small, the distance between the third outer edge 120 of the first adhesive layer 114 and the first outer edge 118 of the first protective layer 113a is small, which reduces the area of ​​the second hollow area 117b, affecting the user's recognition of the appearance state within the projection range of the second hollow area 117b. Therefore, when L1 satisfies 3mm≤L1≤7mm, the connection reliability between the first outer edge 118 of the first protective layer 113a and the light-transmitting layer 112 is high, and it is convenient for the user to observe the appearance state within the projection range of the second hollow area 117b.

[0098] For example, the minimum distance L1 between the third outer edge 120 of the first adhesive layer 114 and the first outer edge 118 of the first protective layer 113 a may be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, etc.

[0099] Fig.11 In the illustrated embodiment, the first adhesive layer 114 is formed into an annular structure, that is, the first adhesive layer 114 is a continuous structure. In other structures, the first adhesive layer may also include a plurality of separately arranged structures.

[0100] Please refer to Fig.12 , Fig.12 This is a bottom view of the first adhesive layer 114 in the screen protection film provided in the present application in another specific embodiment. In this embodiment, the first adhesive layer 114 is located at the four corners of the first protective layer, so that the four corners of the first protective layer and the four corners of the light-transmitting layer are bonded by the first adhesive layer 114. On the basis of ensuring the reliability of the connection between the first protective layer and the light-transmitting layer, the hollow area 117 formed therein is larger, and the observable area of ​​the light-transmitting layer is larger, thereby improving the observation effect of the appearance state of the light-transmitting layer.

[0101] It should be noted that the shape and structure of the first adhesive layer 114 in the present application are not limited to the above-mentioned embodiments. The first adhesive layer 114 can also be surrounded by a polygonal, circular, elliptical or irregular hollow area 117. The first adhesive layer 114 can also be a curved, wavy structure.

[0102] In the above embodiments, in a plane perpendicular to the first direction X, the surface area of ​​the first adhesive layer 114 is S1, the surface area of ​​the first protective layer 113 a is S2, and S1 / S2 satisfies 0.1≤S1 / S2≤0.15.

[0103] In this embodiment, the ratio of S1 / S2 should not be too large or too small. When it is too small, the bonding area between the first adhesive layer 114 and the first protective layer 113a is too small, which reduces the connection reliability between the first protective layer 113a and the light-transmitting layer 112. During production or transportation, the first protective layer 113a and the light-transmitting layer 112 are prone to cracking. When it is too large, the surface area of ​​the hollow region 117 between the light-transmitting layer 112 and the first protective layer 113a is too small, which reduces the observable area of ​​the light-transmitting layer 112 and affects the confirmation of the appearance of the light-transmitting layer 112. Therefore, when the ratio of S1 / S2 satisfies 0.1≤S1 / S2≤0.15, the observable area of ​​the light-transmitting layer 112 is made larger on the basis of ensuring the connection reliability between the first protective layer 113a and the light-transmitting layer 112.

[0104] For example, the ratio of S1 / S2 may be 0.1, 0.12, 0.14, 0.15, etc.

[0105] The above is only a specific implementation of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto, and any changes or replacements within the technical scope disclosed in the embodiment of the present application should be included in the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiment of the present application should be based on the protection scope of the claims.

Claims

1. A screen protective film, characterized in that: The screen protective film comprises: A film body, the film body comprising an upper surface and a lower surface arranged opposite to each other along a first direction; A light-transmitting layer, the light-transmitting layer being arranged on the upper surface of the film body; A first protective layer, the first protective layer is located on a side of the light-transmitting layer away from the film body, and the first protective layer and the light-transmitting layer are bonded to each other via a first adhesive layer; A second protective layer, the second protective layer is located on one side of the lower surface of the film body, and the second protective layer is bonded to the lower surface of the film body via a second adhesive layer; The surface area of ​​the first adhesive layer is smaller than the surface area of ​​the light-transmitting layer, so that a hollow area is provided between the light-transmitting layer and the first protective layer.

2. The screen protection film according to claim 1, characterized in that: The first adhesive layer surrounds the hollow area.

3. The screen protection film according to claim 2, characterized in that: The first protective layer has a first outer edge, the light-transmitting layer has a second outer edge, and the first outer edge is bonded to the second outer edge via the first adhesive layer.

4. The screen protection film according to claim 1, characterized in that: At least a portion of the hollow area is not surrounded by the first adhesive layer.

5. The screen protection film according to claim 4, characterized in that: The hollow area at least includes a first hollow area and a second hollow area, the first hollow area is surrounded by the adhesive layer, and the second hollow area is located on the outside of the first adhesive layer away from the first hollow area.

6. The screen protection film according to claim 5, characterized in that: The minimum distance between the third outer edge of the first adhesive layer and the first outer edge of the first protective layer is L1, and L1 satisfies 3mm≤L1≤7mm.

7. The screen protection film according to any one of claims 1 to 6, characterized in that: The first adhesive layer includes at least two first connecting segments extending along the second direction, and / or the first adhesive layer includes at least two second connecting segments extending along the third direction.

8. The screen protection film according to claim 7, characterized in that: The first adhesive layer further includes at least one third connecting segment; the third connecting segment is located in the area enclosed by the first connecting segment and / or the second connecting segment.

9. The screen protection film according to any one of claims 1 to 6, characterized in that: The first adhesive layer is a continuous structure.

10. The screen protection film according to claim 1, characterized in that: The first adhesive layer includes a plurality of separately arranged structures and is connected to the corners of the first protective layer.

11. The screen protection film according to any one of claims 1 to 6 and 10, characterized in that: The surface area of ​​the first adhesive layer is S1, the surface area of ​​the first protective layer is S2, and S1 / S2 satisfies 0.1≤S1 / S2≤0.15.

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