Protective film, screen assembly and electronic equipment

Abstract

The utility model provides a protective film, a screen assembly and an electronic device, the protective film comprises a first film body used for being adhered to the copper foil surface of a flexible screen, the first film body is provided with an exhaust area, the surface, used for making contact with the copper foil, of the exhaust area is a non-adhesive surface, the exhaust area is provided with a front camera part and a first exhaust structure, the front camera part is used for covering a front camera hole, and the first exhaust structure is used for exhausting the first exhaust structure; the first exhaust structure and the front camera part are arranged at intervals and used for communicating with the atmosphere. Through the arrangement, the channel for air circulation is formed in the exhaust area, and the situation that copper foil of the screen assembly is sunken under the action of the internal and external air pressure difference, and consequently a flexible screen is poor is avoided; meanwhile, the position of the first exhaust structure does not correspond to the position of the front camera hole, so that the front camera hole area can be ensured to have a better dustproof effect, dust is prevented from entering the front camera hole to influence the function of the front camera, and the protective film has the dustproof and exhaust functions at the same time.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a protective film, screen assembly, and electronic device. Background Technology

[0002] Currently, ultrasonic fingerprint chips are being used in an increasing number of flexible screen electronic devices due to their advantages such as high penetration and high recognition rate.

[0003] The ultrasonic fingerprint chip needs to be attached to the back of the flexible screen using an adhesive inside a vacuum chamber. After the flexible screen and the ultrasonic fingerprint chip assembly are attached, they need to be degassed under an environment of 4 times atmospheric pressure to remove air bubbles from the ultrasonic fingerprint chip location.

[0004] During this process, vacuum bonding and high-pressure degassing create a pressure difference between the inside and outside of the flexible screen at the front camera aperture. During vacuum bonding, the internal pressure is greater than the external pressure, causing gas to escape; during high-pressure degassing, the external pressure is greater than the internal pressure.

[0005] In existing technologies, copper foil surfaces are usually provided with a protective film for dust prevention and protection of the copper foil. However, the protective film often cannot simultaneously perform the functions of venting and dust prevention. If the venting effect is poor, the protective film and copper foil at the front camera hole position will deform and sink inward during high-pressure degassing, which can easily squeeze the flexible screen and bring about the risk of black spots. Utility Model Content

[0006] In view of this, this application provides a protective film, a screen assembly, and an electronic device that can simultaneously provide dust protection and ventilation functions.

[0007] Specifically, the following technical solutions are included:

[0008] In a first aspect, this application provides a protective film applied to a flexible screen, wherein the back of the flexible screen has a copper foil, and the flexible screen and the copper foil have a front-facing camera aperture, and the protective film includes:

[0009] A first film body is used to adhere to the surface of the copper foil. The first film body has an exhaust area. The surface of the exhaust area that contacts the copper foil is a non-adhesive surface. The exhaust area has a front-facing portion and a first exhaust structure. The front-facing portion is used to cover the front-facing aperture. The first exhaust structure is spaced apart from the front-facing portion and is used to communicate with the atmosphere.

[0010] In an optional embodiment, the protective film further includes a second film body covering the first film body and having an adhesive-free surface facing away from the venting area. The second film body is provided with a second venting structure, the position of which corresponds to the position of the first venting structure.

[0011] In an optional embodiment, the first exhaust structure and / or the second exhaust structure is a cross-shaped exhaust slit.

[0012] In an optional embodiment, the surface of the venting area that contacts the second membrane is an adhesive surface, and the venting area is bonded to the second membrane.

[0013] In an optional embodiment, the venting area is a membrane sheet that is cut from the first membrane body, flipped, and spliced ​​onto the first membrane body.

[0014] In an optional embodiment, the exhaust region is an axisymmetric shape.

[0015] Secondly, this application provides a screen assembly, the screen assembly including a flexible screen and a protective film provided in any embodiment of the first aspect, the back of the flexible screen having a copper foil, the flexible screen and the copper foil having a front camera hole, and the protective film being adhered to the surface of the copper foil.

[0016] In an optional embodiment, the screen assembly further includes an ultrasonic fingerprint chip disposed on the back of the flexible screen.

[0017] In an optional embodiment, the flexible screen and the copper foil are further provided with light-sensing holes, which are spaced apart from the front camera hole, and the position of the first venting structure of the protective film corresponds to the position of the light-sensing holes.

[0018] In an optional embodiment, the size of the first exhaust structure is smaller than the size of the photosensitive aperture.

[0019] In an optional embodiment, in the orthographic projection of the protective film onto the surface of the copper foil, the edge of the venting region is located outside the edge of the front-viewing hole.

[0020] In an optional embodiment, the distance between the edge of the exhaust region and the edge of the front camera hole is greater than 0.5 mm.

[0021] Thirdly, this application provides an electronic device, characterized in that the electronic device includes a screen component provided in any embodiment of the second aspect.

[0022] The beneficial effects of the technical solution provided in this application embodiment include at least the following: by setting the surface of the exhaust area that contacts the copper foil to be a non-adhesive surface, a channel for gas circulation is formed in the exhaust area. Since the first exhaust structure can communicate with the atmosphere, the exhaust area can also communicate with the atmosphere, thus preventing the copper foil of the screen component from denting under the action of internal and external air pressure difference, which would cause defects in the flexible screen; at the same time, since the first exhaust structure is spaced apart from the front camera part covering the front camera hole, the position of the first exhaust structure does not correspond to the position of the front camera hole, thus ensuring that the front camera hole area has a good dustproof effect, preventing dust from entering the front camera hole and affecting the function of the front camera, so that the protective film can simultaneously take into account the dustproof and exhaust functions. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a partial structural diagram of the first membrane body of the protective film provided in the embodiments of this application;

[0025] Figure 2 A schematic diagram showing the assembly position of the exhaust area and the front camera hole provided in an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the protective film provided in an embodiment of this application.

[0027] The reference numerals in the figure indicate:

[0028] 1-Protective membrane; 11-First membrane; 111-Exhaust region; 111a-Front viewer; 111b-First exhaust structure; 12-Second membrane; 121-Second exhaust structure;

[0029] 10-Flexible screen; 101-Front camera hole; 102-Light sensor hole; 20-Copper foil.

[0030] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In the embodiments of this application, directional terms such as "upper," "lower," and "side" are generally used in the following ways: Figure 1 The relative positions shown are based on the given information, and these directional terms are used only to more clearly describe the relationships between structures, not to describe absolute positions. Positions may change when the product is placed in different orientations; for example, "up" and "down" may be interchanged.

[0033] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0034] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0035] Currently, ultrasonic fingerprint chips are being used in an increasing number of flexible screen electronic devices due to their advantages such as high penetration and high recognition rate.

[0036] The ultrasonic fingerprint chip needs to be attached to the back of the flexible screen using an adhesive inside a vacuum chamber. After the flexible screen and the ultrasonic fingerprint chip assembly are attached, they need to be degassed under an environment of 4 times atmospheric pressure to remove air bubbles from the ultrasonic fingerprint chip location.

[0037] During this process, vacuum bonding and high-pressure degassing create a pressure difference between the inside and outside of the flexible screen at the front camera aperture. During vacuum bonding, the internal pressure is greater than the external pressure, causing gas to escape; during high-pressure degassing, the external pressure is greater than the internal pressure.

[0038] In existing technologies, copper foil surfaces are usually provided with a protective film for dust prevention and protection of the copper foil. However, the protective film often cannot simultaneously perform the functions of venting and dust prevention. If the venting effect is poor, the protective film and copper foil at the front camera hole position will deform and sink inward during high-pressure degassing, which can easily squeeze the flexible screen and bring about the risk of black spots.

[0039] To address the aforementioned technical problems, this application provides a protective film 1, a screen assembly, and an electronic device that can simultaneously provide dust protection and ventilation functions. It should be noted that the ventilation function mentioned in this application refers to the gas exchange function, and is not limited to simply venting gas.

[0040] The protective film 1 provided in this application is applied to electronic devices with flexible screens 10, especially to electronic devices with flexible screens 10 having ultrasonic fingerprint chips. The back of the flexible screen 10 has a copper foil 20, and the flexible screen 10 and the copper foil 20 have a front camera hole 101, which is used to expose the front camera of the electronic device.

[0041] like Figures 1 to 3 As shown, the protective film 1 provided in this application includes a first film body 11, which is used to adhere to the surface of the copper foil 20 and provides a certain degree of protection for the copper foil 20. The first film body 11 is provided with an exhaust area 111, the surface of the exhaust area 111 that is in contact with the copper foil 20 is an adhesive-free surface, the exhaust area 111 has a front-facing portion 111a and a first exhaust structure 111b, the front-facing portion 111a is used to cover the front-facing hole 101, and the first exhaust structure 111b is spaced apart from the front-facing portion 111a and is used to communicate with the atmosphere.

[0042] The area outside the exhaust zone 111 in the first membrane 11 is covered with an adhesive on the surface of the copper foil 20.

[0043] The surface of the exhaust area 111 that comes into contact with the copper foil 20 is an adhesive-free surface without any adhesive coating. The adhesive-free surface does not adhere to the copper foil 20, thus forming a channel for gas flow between the copper foil 20 and the exhaust area 111. Since the first exhaust structure 111b can communicate with the atmosphere, the front camera portion 111a can also communicate with the atmosphere, enabling gas exchange between the area where the front camera hole 101 is located and the outside world, preventing the protective film 1 and the copper foil 20 at the position of the front camera hole 101 from deforming and sinking inward during high-pressure degassing.

[0044] Specifically, such as Figure 2 As shown, the first exhaust structure 111b is located near the front camera hole 101, but matches the position of the front camera hole 101. This setting ensures the dustproof effect of the area where the front camera hole 101 is located. Even if there is dust at the first exhaust structure 111b, the dust will not enter the area where the front camera hole 101 is located. This can prevent the front camera of electronic devices from being affected by dust and thus avoid the image quality.

[0045] For example, the first exhaust structure 111b can be a structure that penetrates the exhaust region 111, such as a hole, groove, or gap, as long as it can ensure that the exhaust region 111 is connected to the atmosphere.

[0046] The protective film 1 provided in this application embodiment has a non-adhesive surface for the surface of the venting area 111 that contacts the copper foil 20. A channel for gas flow is formed in the venting area 111. Since the first venting structure 111b can communicate with the atmosphere, the venting area 111 can also communicate with the atmosphere, preventing the copper foil 20 of the screen assembly from denting under the action of internal and external air pressure difference, thus preventing the flexible screen 10 from malfunctioning. At the same time, since the first venting structure 111b is spaced apart from the front camera part 111a covering the front camera hole 101, the position of the first venting structure 111b does not correspond to the position of the front camera hole 101. Therefore, it can ensure that the area of ​​the front camera hole 101 has a good dustproof effect, preventing dust from entering the front camera hole 101 and affecting the function of the front camera. Thus, the protective film 1 takes into account both dustproof and venting functions.

[0047] In a further embodiment, such as Figure 3 As shown, the protective film 1 also includes a second film 12, which covers the first film 11 and is away from the adhesive-free surface of the exhaust area 111. The second film 12 is provided with a second exhaust structure 121, and the position of the second exhaust structure 121 corresponds to the position of the first exhaust structure 111b.

[0048] Specifically, the second film 12 is bonded to and stacked with the first film 11. The second film 12 is located on the side of the first film 11 away from the copper foil 20. The protective film 1 has a double-layer structure, which fully ensures the protective effect on the copper foil 20 of the flexible screen 10 and avoids damage to the copper foil 20.

[0049] Since the position of the second exhaust structure 121 corresponds to the position of the first exhaust structure 111b, it can be ensured that the second exhaust structure 121 is connected to the first exhaust structure 111b and the atmosphere respectively, thereby enabling the exhaust area 111 to fully exchange gases with the atmospheric environment and ensuring the exhaust effect of the protective film 1.

[0050] For example, the second exhaust structure 121 can be a structure that penetrates the second membrane 12, such as a hole, groove, or gap. The second exhaust structure 121 and the first exhaust structure 111b can have the same structure or different structures.

[0051] In one specific embodiment, the first exhaust structure 111b and / or the second exhaust structure 121 are cross-shaped exhaust slots.

[0052] For example, a cross-shaped section penetrating the membrane can be cut into the venting area 111 to form the first venting structure 111b; a cross-shaped section penetrating the membrane can be cut into the second membrane 12 to form the second venting structure 121. This arrangement ensures that both the first venting structure 111b and the second venting structure 121 have good venting performance, while also preventing dust from entering, thus ensuring that the protective membrane 1 has good dustproof performance.

[0053] In one embodiment, the surface of the venting region 111 that contacts the second membrane 12 is an adhesive surface, and the venting region 111 is bonded to the second membrane 12.

[0054] The surface of the exhaust region 111 that is in contact with the second membrane 12 is coated with an adhesive, thereby achieving the bonding between the exhaust region 111 and the second membrane 12 and improving the connection stability between the exhaust region 111 and the second membrane 12.

[0055] Furthermore, the exhaust region 111 is a membrane sheet that is cut from the first membrane body 11, flipped and spliced ​​onto the first membrane body 11, that is, the first membrane body 11 is a spliced ​​membrane structure.

[0056] The adhesive side of the first membrane 11 faces the copper foil 20, and the non-adhesive side faces away from the copper foil 20. By cutting out a portion of the first membrane 11, flipping the cut membrane, and splicing it into the cutting hole of the first membrane 11, the venting area 111 can be obtained. At this time, the adhesive side of the venting area 111 faces away from the copper foil 20 and faces the second membrane 12, and the non-adhesive side of the venting area 111 faces the copper foil 20, which is exactly the opposite of the distribution of adhesive and non-adhesive sides in the area outside the venting area 111 on the first membrane 11.

[0057] With this setup, no special processing is required for the first membrane 11 to obtain the exhaust area 111 where the adhesive and non-adhesive surfaces are flipped relative to other areas of the first membrane 11. This is simple to operate and also helps to control production costs.

[0058] In a further embodiment, the exhaust region 111 is an axisymmetric shape, which ensures that the exhaust region 111 can still match the shape of the cutting hole on the first membrane 11 after being flipped.

[0059] For example Figure 1 and Figure 2 As shown, the exhaust area 111 is oval in shape.

[0060] This application also provides a screen assembly, including a flexible screen 10 and a protective film 1 provided in any of the above embodiments. The back of the flexible screen 10 has a copper foil 20, and a front camera hole 101 is formed between the flexible screen 10 and the copper foil 20. The protective film 1 is adhered to the surface of the copper foil 20. The front camera hole 101 is used to expose the front-facing camera of the electronic device.

[0061] The flexible screen 10 can be an AMOLED (Active-matrix organic light-emitting diode) flexible screen, an OLED (Organic Light-Emitting Diode) flexible screen, etc. The back of the flexible screen 10 is the side surface that is not used for display.

[0062] The screen assembly provided in this application embodiment has a non-adhesive surface in the venting area 111 of the protective film 1 for contacting the copper foil 20. A channel for gas flow is formed in the venting area 111. Since the first venting structure 111b can communicate with the atmosphere, the venting area 111 can also communicate with the atmosphere, preventing the copper foil 20 of the screen assembly from denting under the action of internal and external air pressure difference, thus avoiding defects in the flexible screen 10. At the same time, since the first venting structure 111b is spaced apart from the front camera portion 111a covering the front camera hole 101, and the position of the first venting structure 111b does not correspond to the position of the front camera hole 101, it can ensure that the area of ​​the front camera hole 101 has a good dustproof effect, preventing dust from entering the front camera hole 101 and affecting the function of the front camera. Thus, the protective film 1 takes into account both dustproof and venting functions.

[0063] Furthermore, the screen assembly also includes an ultrasonic fingerprint chip, which is located on the back of the flexible screen 10.

[0064] Since the screen assembly provided in this application embodiment is provided with a protective film 1 that has both dustproof and exhaust functions, during the installation of the ultrasonic fingerprint chip, especially in the high-pressure degassing process, the protective film 1 can ensure that the screen assembly exchanges gas with the outside world, reduce the pressure difference between the inside and outside of the screen assembly, and prevent the copper foil 20 from deforming and sinking inward, thus preventing adverse risks to the flexible screen 10.

[0065] Furthermore, the flexible screen 10 and the copper foil 20 are also provided with light-sensing holes 102, which are spaced apart from the front camera hole 101. The position of the first venting structure 111b of the protective film 1 corresponds to the position of the light-sensing hole 102.

[0066] The light sensor 102 is used to ensure that the light sensor of the electronic device can receive light normally, so that the light sensor can detect the light intensity of the surrounding environment and automatically adjust the screen brightness according to the changes in light intensity.

[0067] like Figure 2As shown, the light sensor 102 is located near the front camera aperture 101, and the position of the first exhaust structure 111b matches the position of the light sensor 102. This arrangement ensures that while the exhaust area 111 is open to the atmosphere, it also guarantees dust protection for the area where the front camera aperture 101 is located. Even if there is dust at the first exhaust structure 111b, it will not enter the area where the front camera aperture 101 is located, thus preventing dust from affecting the image quality of the electronic device's front-facing camera. Furthermore, since dust has a relatively small impact on photosensitivity, even if there is dust at the first exhaust structure 111b, it will not affect the function of the light sensor.

[0068] For screen components that do not have a light sensor hole 102, or whose light sensor hole 102 is not near the front camera hole 101, the first exhaust structure 111b can also be set in other positions near the front camera hole 101.

[0069] In a further embodiment, the size of the first exhaust structure 111b is smaller than the size of the photosensitive aperture 102.

[0070] like Figure 2 As shown, when the first exhaust structure 111b is a cross-shaped exhaust slit, the orthographic projection of the first exhaust structure 111b is located inside the photosensitive hole 102 and does not extend outside the photosensitive hole 102. The orthographic projection of the first exhaust structure 111b is the orthographic projection on the surface of the copper foil 20.

[0071] This setting further prevents dust from penetrating deep into the exhaust area 111 and entering the location of the front camera hole 101, thus helping to improve the dustproof effect of the protective film 1.

[0072] In one embodiment, in the orthographic projection of the protective film 1 onto the surface of the copper foil 20, the edge of the venting region 111 is located outside the edge of the front camera hole 101.

[0073] This setting ensures that the exhaust area 111 fully covers the front camera hole 101, guaranteeing the gas exchange effect in the area of ​​the front camera hole 101 and preventing the copper foil 20 from sinking.

[0074] Furthermore, the distance between the edge of the exhaust region 111 and the edge of the front camera hole 101 is greater than 0.5 mm.

[0075] This setting ensures that the exhaust area 111 has both good exhaust performance and good dust prevention.

[0076] This application also provides an electronic device, which includes the screen component provided in any of the above embodiments.

[0077] Electronic devices can be mobile phones, laptops, tablets, mobile phone accessories, laptop accessories, tablet accessories, etc., and this application does not specifically limit them.

[0078] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0079] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0080] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A protective film (1) applied to a flexible screen (10), the back of the flexible screen (10) having a copper foil (20), the flexible screen (10) and the copper foil (20) having a front camera hole (101), characterized in that, The protective film (1) comprises: A first film (11) is used to adhere to the surface of the copper foil (20). The first film (11) is provided with an exhaust area (111). The surface of the exhaust area (111) that contacts the copper foil (20) is a non-adhesive surface. The exhaust area (111) has a front-facing portion (111a) and a first exhaust structure (111b). The front-facing portion (111a) is used to cover the front-facing hole (101). The first exhaust structure (111b) is spaced apart from the front-facing portion (111a) and is used to communicate with the atmosphere.

2. The protective film (1) according to claim 1, characterized in that, The protective film (1) further includes a second film (12), which covers the adhesive-free surface of the first film (11) and is away from the exhaust area (111). The second film (12) is provided with a second exhaust structure (121), and the position of the second exhaust structure (121) corresponds to the position of the first exhaust structure (111b).

3. The protective film (1) according to claim 2, characterized in that, The first exhaust structure (111b) and / or the second exhaust structure (121) are cross-shaped exhaust slits.

4. The protective film (1) according to claim 2, characterized in that, The surface of the venting area (111) that is in contact with the second membrane (12) is an adhesive surface, and the venting area (111) is bonded to the second membrane (12).

5. The protective film (1) according to claim 4, characterized in that, The exhaust area (111) is a membrane that is cut from the first membrane (11), flipped and spliced ​​onto the first membrane (11).

6. The protective film (1) according to claim 5, characterized in that, The exhaust region (111) is an axisymmetric figure.

7. A screen assembly, characterized in that, The screen assembly includes a flexible screen (10) and a protective film (1) as described in any one of claims 1 to 6. The flexible screen (10) has a copper foil (20) on its back side. The flexible screen (10) and the copper foil (20) have a front camera hole (101). The protective film (1) is adhered to the surface of the copper foil (20).

8. The screen assembly according to claim 7, characterized in that, The screen assembly also includes an ultrasonic fingerprint chip disposed on the back of the flexible screen (10).

9. The screen assembly according to claim 7, characterized in that, The flexible screen (10) and the copper foil (20) are also provided with a light-sensing hole (102), the light-sensing hole (102) is spaced apart from the front camera hole (101), and the position of the first exhaust structure (111b) of the protective film (1) corresponds to the position of the light-sensing hole (102).

10. The screen assembly according to claim 9, characterized in that, The size of the first exhaust structure (111b) is smaller than the size of the photosensitive hole (102).

11. The screen assembly according to claim 7, characterized in that, In the orthographic projection of the protective film (1) onto the surface of the copper foil (20), the edge of the venting region (111) is located outside the edge of the front aperture (101).

12. The screen assembly according to claim 11, characterized in that, The distance between the edge of the exhaust region (111) and the edge of the front camera hole (101) is greater than 0.5 mm.

13. An electronic device, characterized in that, The electronic device includes the screen assembly as described in any one of claims 7 to 12.

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