Display components and electronic devices

Abstract

The present application relates to the technical field of electronic equipment, and in particular to a display screen assembly and electronic equipment. The display screen assembly includes a display screen, a polarizer and a cover. The display screen includes a display area and a non-display area. The non-display area is located at the edge of the display screen and surrounds the display area. The polarizer is arranged on the display screen along the thickness direction of the display screen. The water drop angle of the surface of the polarizer facing away from the display screen is less than or equal to 70°. The cover is arranged on the polarizer along the thickness direction and is bonded to part of the surface of the polarizer. The cover is used to cover at least part of the non-display area and the first gap, which is the gap between the edge of the display screen and the shell of the electronic device. In the above manner, the cover can be connected to the polarizer by bonding. In this case, there is no need to set a fixing bracket to fix the cover, thereby shortening the distance between the display area of ​​the display screen and the side wall of the second shell, thereby increasing the screen-to-body ratio.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a display screen assembly and an electronic device. Background Art

[0002] With the rapid development of electronic device technology, electronic devices equipped with displays, such as televisions and laptops, have become essential tools in people's work and daily lives. At the same time, people's expectations for the performance and quality of electronic devices are also increasing. In particular, electronic devices with high screen-to-body ratios are becoming market favorites and highly sought after because they provide users with a more immersive and transparent visual experience.

[0003] Currently, functional shading areas are common in the structural design of electronic devices. For example, organic light-emitting diode (OLED) displays typically feature a cover (such as mylar) around their edges. This cover primarily serves to offset assembly tolerances between the display and the electronic device housing, and to cover the wiring layout in the non-visible areas of the display. However, to reliably secure the cover, traditional solutions require the addition of an annular fixing bracket around the display module. This structure increases the width of the shading area on one side, reducing the screen-to-body ratio of the electronic device. Summary of the Invention

[0004] The embodiments of the present application provide a display screen assembly and an electronic device, wherein a cover member and a polarizer are connected by bonding, which can reduce the length of the cover member and thus increase the screen-to-body ratio.

[0005] In a first aspect, an embodiment of the present application provides a display screen assembly, comprising: a display screen, the display screen comprising a display area and a non-display area, the non-display area being located at the edge of the display screen and surrounding the display area; a polarizer, the polarizer being arranged on the display screen along a thickness direction of the display screen, the water drop angle of the surface of the polarizer facing away from the display screen being less than or equal to 70°; a covering member, the covering member being arranged on the polarizer along a thickness direction and bonded to a portion of the surface of the polarizer, the covering member being used to cover a first gap and at least a portion of the non-display area, the first gap being the gap between the edge of the display screen and the housing of the electronic device, and the length of the covering member being related to the length of the non-display area.

[0006] In the embodiment of the present application, by controlling the water drop angle on the surface of the polarizer on the display screen to be less than or equal to 70°, the surface of the polarizer has a high surface energy, making it adhesive. In this way, the cover can be connected to the polarizer by bonding. In this case, there is no need for a fixing bracket to secure the cover, thereby shortening the distance between the display area 201b of the display screen and the side wall of the second housing, thereby increasing the screen-to-body ratio.

[0007] In a possible implementation of the first aspect, the polarizer includes a substrate and a coating, the coating is provided on a surface of the substrate facing away from the display screen, the coating is constructed as the surface of the polarizer, and the fluorine content in the coating is less than or equal to 0.5%.

[0008] It can be understood that the surface energy of fluorine-containing materials is low. After adding fluorine-containing additives to the coating, the surface adhesion of the coating is poor. Therefore, by controlling the content of fluorine element in the coating to be less than or equal to 0.5%, the surface energy of the coating can be avoided from being too low and the surface adhesion of the coating can be improved.

[0009] In a possible implementation of the first aspect, the silicon content in the coating is less than or equal to 5%.

[0010] It is understood that the surface-modified silicon-containing filler will reduce the surface adhesiveness of the coating. Therefore, by controlling the fluorine content in the coating to be less than or equal to 5%, the surface adhesiveness of the coating can be improved.

[0011] In a possible implementation of the first aspect, the display screen assembly further includes a camera, the camera having an optical collection end arranged along the thickness direction, the optical collection end including an optical collection part and a connecting part; a through hole is provided on the covering member, the connecting part is bonded to the covering member, and the through hole exposes the optical collection part.

[0012] It can be understood that by bonding the camera to the cover, the camera assembly can be completed without the need to precisely align the camera's optical acquisition unit with the through-hole during assembly of the display assembly. This reduces the camera's assembly tolerances, thereby reducing the cover's length and increasing the screen-to-body ratio. Furthermore, since precise positioning is not required during camera assembly, the assembly efficiency of the display assembly can be improved.

[0013] In a possible implementation of the first aspect, the cover and the polarizer are bonded together by a low-pressure adhesive, and an activation pressure of the low-pressure adhesive is less than or equal to 10N.

[0014] It can be understood that the smaller the activation pressure of the low-pressure back glue, the smaller the force required to achieve a firm bond between the cover and the polarizer, thereby protecting the polarizer and the cover to prevent damage to the display screen and / or polarizer when the low-pressure back glue is activated.

[0015] In a possible implementation of the first aspect, the low-pressure back glue includes a substrate having a first surface and a second surface opposite to each other in the thickness direction, an adhesive layer is provided on the first surface and the second surface, and a microstructure is provided between the adhesive layer and the substrate, and the microstructure is used to increase the contact area between the adhesive layer and the substrate.

[0016] It can be understood that by providing a microstructure between the adhesive layer and the substrate, the contact area between the adhesive layer and the substrate can be increased, thereby improving the firmness of the bonding between the cover and the polarizer.

[0017] In a possible implementation manner of the first aspect, the microstructure is micropores.

[0018] It is understood that the use of micropores in the microstructure can reduce the processing cost of the low-pressure adhesive, thereby reducing the cost of the display assembly. In addition, the use of micropores in the microstructure can also reduce the complexity of the process of bonding the cover member to the polarizer.

[0019] In a possible implementation of the first aspect, the substrate is made of one of polyethylene, polyvinyl chloride, polypropylene, or polyethylene terephthalate.

[0020] It is understandable that the material of the substrate is one of polyethylene, polyvinyl chloride, polypropylene or polyethylene terephthalate, which can reduce the cost of using the low-pressure adhesive and thus reduce the cost of the display assembly.

[0021] In a possible implementation of the first aspect, the peeling force of the adhesive layer is greater than or equal to 10N / cm 2 .

[0022] It can be understood that the peeling force of the adhesive layer is greater than or equal to 10N / cm 2 The connection reliability between the cover and the polarizer can be improved.

[0023] In a possible implementation of the first aspect, the shear strength of the low-pressure adhesive is greater than or equal to 1 MPa.

[0024] It can be understood that the shear strength of the low-pressure backing adhesive can be greater than or equal to 1 MPa, so that the low-pressure backing adhesive can withstand greater shear force, thereby better resisting the relative sliding between the adherends and improving the shear resistance of the connection structure obtained after the polarizer and the cover are bonded.

[0025] In a possible implementation of the first aspect, the length of the covering member is greater than the length of the non-display area.

[0026] It can be understood that the length of the covering member is greater than the length of the non-display area, so that the covering member can cover the non-display area and improve the aesthetics of the display screen assembly.

[0027] In a possible implementation of the first aspect, the length of the covering member is 1.5 mm-2.5 mm.

[0028] It can be understood that the length of the cover is 1.5mm-2.5mm, which can achieve a narrower functional shading area and increase the screen-to-body ratio.

[0029] In a possible implementation of the first aspect, the cover has a first projection on the display screen, the first projection is away from a side of the first gap, and the distance between the first projection and an edge of the display area is 0.3 mm-0.8 mm.

[0030] It can be understood that the cover has a first projection on the display screen, and the first projection is away from the side of the first gap, and the distance between it and the edge of the display area is 0.3mm-0.8mm. That is to say, the distance between the edge of the cover facing the display area and the display area is 0.3mm-0.8mm. By designing a smaller gap size, the screen-to-body ratio can be further improved.

[0031] In a second aspect, an embodiment of the present application provides an electronic device, comprising a housing and the display screen assembly provided in the first aspect, wherein the display screen assembly is installed in the housing.

[0032] In a possible implementation of the second aspect, a first gap is provided between an edge of the display screen and the housing, and the covering member is disposed on the polarizer and the first gap along a thickness direction.

[0033] The beneficial effects of the second aspect can be referred to the beneficial effects that can be achieved by any implementation method of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1A A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0035] Figure 1B A schematic diagram of a top view of a display screen assembly and a second housing provided in an embodiment of the present application;

[0036] Figure 1C A schematic diagram of the three-dimensional structure of a display screen provided in an embodiment of the present application;

[0037] Figure 1D A schematic diagram of the three-dimensional structure of a display screen assembly and a second housing provided in an embodiment of the present application;

[0038] Figure 1E A schematic diagram of the three-dimensional structure of a polarizer provided in an embodiment of the present application;

[0039] Figure 1F A schematic diagram of a laminated structure of a polarizer provided in an embodiment of the present application;

[0040] Figure 1G A schematic cross-sectional view of a display screen assembly provided in an embodiment of the present application;

[0041] Figure 2A A schematic structural diagram of a display screen assembly provided in an embodiment of the present application;

[0042] Figure 2B A schematic structural diagram of a water drop angle on the surface of a polarizer provided in an embodiment of the present application;

[0043] Figure 2C A schematic cross-sectional view of a display screen assembly provided in an embodiment of the present application;

[0044] Figure 3 This is an energy spectrum analysis diagram of a hardened coating of Sample 1 provided in an embodiment of the present application;

[0045] Figure 4 A Fourier transform infrared spectrum of a hardened coating of Sample 1 provided in an embodiment of the present application;

[0046] Figure 5 This is an energy spectrum analysis of the hardened coating of Sample 2 provided in the embodiments of the present application;

[0047] Figure 6 A Fourier transform infrared spectrum of a hardened coating of Sample 2 provided in an embodiment of the present application;

[0048] Figure 7 This is an energy spectrum analysis diagram of the hardened coating of Sample 3 provided in an embodiment of the present application;

[0049] Figure 8 This is a Fourier transform infrared spectrum of a hardened coating of Sample 3 provided in an embodiment of the present application;

[0050] Figure 9 Scanning electron microscope scans of the hardened coating of Sample 1, Sample 2, and Sample 3 provided in the embodiments of the present application;

[0051] Figure 10 A schematic diagram of the connection structure of a cover, a polarizer, and a display screen provided in an embodiment of the present application;

[0052] Figure 11 A schematic structural diagram of a low-pressure adhesive provided in an embodiment of the present application;

[0053] Figure 12 A schematic cross-sectional view of a display screen assembly provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0055] An embodiment of the present application provides an electronic device 100, which is a type of electronic device 100 having a display screen 201. Specifically, the electronic device 100 includes, but is not limited to, mobile phones, tablet computers, laptop computers, personal digital assistants (PDAs), personal computers, notebook computers, in-vehicle devices, wearable devices, walkmans, radios, and the like. Wearable devices include, but are not limited to, smart bracelets, smart watches, smart head-mounted displays, and smart glasses. The following description uses a laptop computer as an example.

[0056] See also Figure 1A , Figure 1A The structure of an electronic device 100 is shown. This embodiment and the following embodiments are described using a laptop computer as an example. For ease of description, the X direction may be the width of the laptop computer, the Y direction may be the length of the laptop computer, and the Z direction may be the thickness of the laptop computer when folded. The X, Y, and Z directions may be perpendicular to each other.

[0057] refer to Figure 1A As shown, the electronic device 100 may include a housing 101, a keyboard 102, a touchpad 103, and a display assembly 20. The housing 101 is used to protect the internal components of the electronic device 100 and may be made of plastic, aluminum, aluminum alloy, titanium alloy, carbon fiber, etc. The housing 101 may include a first housing 101b on the keyboard 102 side and a second housing 101a on the display 201 side.

[0058] The keyboard 102 can be disposed within the first housing 101b. The keyboard 102 is the primary tool for users to input commands and data and can include multiple keys. A touchpad 103 can also be disposed within the first housing 101b. This touchpad 103 can function as a mouse, sensing finger movements and clicks to control the cursor and perform operations. Users can control the electronic device 100 using the keyboard 102 and touchpad 103.

[0059] The display screen assembly 20 is disposed in the second housing 101a and is used to realize the display function of the notebook computer. Figure 1B Shows a top view structure of the display screen assembly 20 and the second housing 101a, referring to Figure 1BThe display assembly 20 may include a display 201 and a cover 202. For example, the display 201 may be an OLED display 201. The OLED display 201 does not require a backlight and can therefore be made thinner and lighter, facilitating the realization of an ultra-thin electronic device 100. The cover 202 is used to cover the assembly tolerance between the display 201 and the housing 101 of the electronic device 100, and to cover the wiring layout in the non-visible area of ​​the display 201. For example, the cover 202 may be made of plastic or metal, such as polyethylene terephthalate, polyvinyl chloride, polycarbonate, polypropylene, polymethyl methacrylate, aluminum, or an aluminum alloy.

[0060] Figure 1C Shows a three-dimensional structure of a display screen, referring to Figure 1C The display screen 201 may include a display area 201b and a non-display area 201a. The non-display area 201a is located at the edge of the display screen 201 and surrounds the display area 201b. In actual applications, the display area 201b refers to the area of ​​the display screen 201 that can display images, text, and other information. The non-display area 201a refers to the part of the display screen 201 that is not directly used for displaying content. It mainly serves to support, protect, and assist the normal operation of the display area 201b.

[0061] The display screen assembly 20 may further include a polarizer 210. Figure 1D Shows a three-dimensional structure of the display assembly 20 and the second housing 101a, referring to Figure 1D Polarizer 210 can be stacked along the Z direction on the surface of display screen 201. Polarizer 210 can convert natural light into polarized light. When external light shines on the surface of display screen 201, polarizer 210 can effectively reduce the intensity and amount of reflected light, reducing the interference of external light on the screen display content, thereby improving display quality.

[0062] Figure 1E Shows a three-dimensional structure of a polarizer, refer to Figure 1E The polarizer 210 may include a substrate 211 and a coating layer 212 stacked on the substrate 211 along the Z direction. A surface of the coating layer 212 is configured as one surface of the polarizer 210 .

[0063] In some embodiments, the substrate 211 may include multiple functional layers stacked together. As an example, Figure 1F A laminated structure of a polarizer 210 is shown, referring to Figure 1F The substrate 211 may include an adhesive layer 211a, an optical compensation layer 211b, a first protective layer 211c, a polarizing layer 211d, and a second protective layer 211e stacked along the Z direction.

[0064] Adhesive layer 211a may be a pressure-sensitive adhesive (PSA), which is used to connect polarizer 210 to display screen 201. Optical waveguide plate (OWP) 211b is used to adjust the phase of light or reduce reflection. First protective layer 211c and second protective layer 211e are used to protect polarizing layer 211d disposed between first protective layer 211c and second protective layer 211e. For example, first protective layer 211c and second protective layer 211e may be made of triacetyl cellulose (TAC). Polarizing layer 211d is used to implement the polarization function of polarizer 210, allowing light in a specific direction to pass through while blocking light in other directions. Optionally, polarizing layer 211d may be made of polyvinyl alcohol (PVA).

[0065] Coating 212 can be one or more of a hard coating (HC) 212a, an anti-reflective coating (ARC), and an anti-glare coating (AGC). Coating 212 can be disposed on the surface of the second protective layer 211e facing away from the polarizing layer 211d. The composition of coating 212 is typically complex, and various additives or fillers are often added to enhance surface wear resistance, hardness, or smoothness.

[0066] For ease of description, the specific implementation of the coating 212 is introduced below by taking the hardened coating 212 a as an example.

[0067] The hardened coating 212a protects the surface of the polarizer 210 from scratches and abrasion, ensuring the durability and optical performance of the polarizer 210. The hardened coating 212a can be obtained by drying a hardened coating applied to the surface of the second protective layer 211e. The hardened coating typically includes components such as a resin, an inorganic filler, an organic / inorganic hybrid resin, and a photoinitiator.

[0068] Resin (e.g., polyurethane acrylate) is the primary film-forming substance of hardened coating 212a, providing fundamental performance. Inorganic fillers enhance the mechanical properties of the coating. For example, fillers such as silica and alumina dispersed within the resin matrix directly improve surface hardness and wear resistance. Organic / inorganic hybrid resins are used to achieve synergistic reinforcement between organic and inorganic materials. Embedding inorganic nanoparticles (e.g., silica and alumina) into organic resins through chemical bonding or physical doping can enhance the structural stability of hardened coating 212a. Photoinitiators trigger the ultraviolet (UV) curing reaction, enabling rapid hardening of the hardened coating.

[0069] The hardening coating 212a mainly prevents scratches and wear to ensure the durability and optical performance of the polarizer 210. Therefore, when selecting the components of the hardening coating, the wear resistance and hardness of the hardening coating 212a often need to be considered.

[0070] To enhance wear resistance, a fluorine-containing additive can be added to the hardening coating. The addition of fluorine can make the resulting hardened coating 212a smoother and more slippery. Fluorine also effectively crosslinks with the resin, enhancing the structural stability of the hardened coating 212a. Furthermore, wear-resistant particles can be added to the hardening coating. These particles possess high hardness and wear resistance, allowing them to withstand external mechanical friction and protect the underlying resin material from wear. Furthermore, a nitrogen atmosphere can be used during the curing process to reduce oxygen interference with the curing reaction, thereby increasing the crosslinking density and surface hardness of the hardening coating and further enhancing wear resistance.

[0071] From a hardness perspective, the resin can be a high-functionality resin, such as polyurethane acrylate with 8 or 10 functional groups. High-functionality resins have more crosslinking sites, which can increase the crosslinking density, enhance the rigidity, compressive strength, and scratch resistance of the hardened coating 212a, and reduce plastic deformation. Inorganic fillers can be particles with a high surface coverage ratio to increase the packing density of the hardened coating 212a, thereby reducing voids within the hardened coating 212a and enhancing the mechanical strength and hardness of the coating. Furthermore, inorganic additives can be added to the hardened coating to improve its properties.

[0072] In practical applications, fluorine-containing materials have low surface energy. Adding a fluorine-containing additive to hardened coating 212a results in poor surface adhesion. Furthermore, silicon-containing fillers or additives, such as fumed silica, primarily enhance leveling properties. However, surface-modified silica also tends to have a low surface energy. This results in a lower surface energy for the resulting hardened coating 212a after curing, further reducing the surface adhesion of hardened coating 212a.

[0073] In order to install the cover 202 , a fixing bracket 104 is generally used in the related art to fix the cover 202 .

[0074] Specifically, Figure 1G A cross-sectional structure of a display screen assembly 20 is shown, and the section line can be along Figure 1B AA in. Reference Figure 1GThe second shell 101a may include a bottom wall 101d and a side wall 101c. The bottom wall 101d and the side wall 101c may form a box-shaped structure with an opening at one end. The display screen 201 may be installed in the second shell 101a through the opening.

[0075] refer to Figure 1G As shown, a ring of fixing brackets 104 is provided along the side wall 101c of the second housing 101a. The fixing brackets 104 are used to fix the cover 202. Specifically, the fixing brackets 104 can be connected to the bottom wall 101d and / or the side wall 101c of the second housing 101a. The fixing brackets 104 can be a stepped structure having a stepped surface 104a.

[0076] refer to Figure 1G As shown, a gap 105a is defined between the edge of the non-display area 201a facing away from the display area 201b and the support portion. The cover 202 is disposed along the Z-direction over the polarizer 210 and the gap 105a. Specifically, the cover 202 can cover the non-display area 201a and the gap between the display screen 201 and the fixing bracket 104, thereby improving the appearance of the display screen assembly 20. A portion of the lower surface of the cover 202 (facing the sidewall 101c) can be disposed on the stepped surface 104a. For example, a portion of the lower surface of the cover 202 can be bonded to the stepped surface 104a, for example, by glue or tape. In some embodiments, the cover 202 can also be connected to the stepped surface 104a by other means, such as welding or snap-fitting.

[0077] refer to Figure 1G As shown, the height of the stepped surface 104a of the fixing bracket 104 is equal to or slightly higher than the height of the stacked display screen 201 and polarizer 210. The remaining portion of the lower surface of the cover 202 (i.e., the portion of the lower surface excluding the portion disposed on the stepped surface 104a) can be disposed above the polarizer 210, and the remaining portion of the lower surface of the cover 202 can partially cover the non-display area 201a of the display screen 201. For example, the distance between the edge of the cover 202 facing the display area 201b and the edge of the display area 201b (i.e., the boundary between the display area 201b and the non-display area 201a) is 0.3 mm to 0.8 mm. In some embodiments, the remaining portion of the lower surface of the cover 202 can also completely cover the non-display area 201a of the display screen 201, thereby reducing the length of the cover 202. It can be understood that the length of the cover 202 refers to the length between the edge of the cover 202 close to the side wall 101c of the second shell 101a and the edge of the cover 202 away from the side wall 101c of the second shell 101a, that is, Figure 1G The cover 202 is shown with a dimension L along the Y direction.

[0078] It can be understood that due to the presence of the fixing bracket 104 , there is a relatively wide distance W between the display area 201 b of the display screen 201 and the side wall 101 c of the second shell 101 a , which greatly reduces the screen-to-body ratio of the display screen 201 .

[0079] In view of this, an embodiment of the present application provides a display screen assembly 20, Figure 2A Shows a structure of a display screen assembly 20, referring to Figure 2A The display screen assembly 20 may include a display screen 201, a polarizer 210, and a cover 202. The display screen 201 includes a display area 201b and a non-display area 201a. The non-display area 201a is located at the edge of the display screen 201 and surrounds the display area 201b (refer to FIG. Figure 1C (As shown). Polarizer 210 is positioned on display screen 201 along the Z direction of display screen 201. The surface of polarizer 210 facing away from display screen 201 has a water drop angle of less than or equal to 70°. Cover 202 is positioned along the Z direction between polarizer 210 and first gap 105 and is bonded to a portion of the surface of polarizer 210. First gap 105 is the gap between the edge of display screen 201 and housing 101 of electronic device 100. The length of cover 202 is related to the length of non-display area 201a. This approach can increase the screen-to-body ratio of display screen assembly 20.

[0080] Figure 2B A schematic diagram of the structure of a water drop angle on the surface of a polarizer 210 is shown. Figure 2B , the water drop angle θ on the surface of the polarizer 210 is less than or equal to 70°. It can be understood that by controlling the water drop angle θ on the surface of the polarizer 210 on the display screen 201 to be less than or equal to 70°, the surface of the polarizer 210 has a higher surface energy, making it adhesive. In this way, the cover 202 can be connected to the polarizer 210 by bonding. In this case, there is no need to provide a fixing bracket 104 to secure the cover 202, thereby shortening the distance between the display area 201b of the display screen 201 and the side wall 101c of the second housing 101a, thereby increasing the screen-to-body ratio.

[0081] The following is a detailed description of the display screen assembly 20 provided in an embodiment of the present application, with reference to the accompanying drawings. For ease of explanation, the following description uses the OLED display screen 201 as an example of the display screen 201 and the hardened coating layer 212a as an example of the layer to describe the specific implementation of the display screen assembly 20 provided in the present application.

[0082] refer to Figure 2A As shown, Figure 1D The difference of the display screen assembly 20 shown is that the cover 202 is not fixed by the fixing bracket 104 , but is fixed by bonding with the polarizer 210 . Figure 2C A cross-sectional structure of a display screen assembly 20 is shown, referring to Figure 2C , compared to Figure 1G The display screen assembly 20 shown can reduce the length L of the cover 202 and shorten the distance W between the display area 201b of the display screen 201 and the side wall 101c of the second shell 101a, thereby increasing the screen-to-body ratio.

[0083] As described above, the polarizer 210 may include a substrate 211 and a hardened coating 212a. The hardened coating 212a is disposed on the surface of the substrate 211 facing away from the display screen 201. The hardened coating 212a is configured as a surface of the polarizer 210. In the embodiment of the present application, the water drop angle of the surface of the polarizer 210 facing away from the display screen 201 is less than or equal to 70°. In other words, the hardened coating 212a has a relatively high surface energy.

[0084] For example, due to the low surface energy of fluorine-containing materials, the presence of fluorine in the hardened coating 212a may be prohibited in order to improve its surface energy. Optionally, the fluorine content in the hardened coating 212a is less than or equal to 0.5%. For hardened coatings, the primary function of fluorine-containing additives is to improve the surface slipperiness of the resulting hardened coating 212a. After fluorine is prohibited, other non-fluorine-containing additives, such as inorganic salt additives, may be used to improve the surface slipperiness of the hardened coating 212a. For example, phosphate additives may be used to improve the surface slipperiness of the hardened coating 212a.

[0085] For example, to improve the surface adhesion of the hardened coating 212a, the silicon content in the hardened coating 212a may also need to be controlled. Optionally, the silicon content in the hardened coating 212a is less than or equal to 5%. Silicon-containing fillers, such as fumed silica, are used in hardening coatings to improve the leveling properties of the hardened coating. Other leveling fillers, such as barium sulfate fillers, can be used in place of fumed silica to achieve the same leveling properties as the hardened coating.

[0086] By disabling the fluorine element in the hardened coating 212a (ie, the fluorine element is less than or equal to 0.5%) and controlling the silicon element content in the hardened coating 212a, the surface energy of the hardened coating 212a can be greatly improved, making the surface adhesive.

[0087] For example, Table 1 shows the element contents of the hardened coating 212 a of three samples. By disabling the fluorine element and controlling the content of the silicon element, the surface energy of the hardened coating 212 a can be increased.

[0088] Table 1 Element content of hardened coatings of three samples

[0089]

[0090] Figure 3 The energy dispersive spectroscopy (EDS) diagram of the hardened coating 212a of Example 1 is shown. Figure 3 By performing energy spectrum analysis on the hardened coating 212a of Sample 1, the actual element content of the hardened coating 212a of Sample 1 can be obtained. The actual element content of the hardened coating 212a of Sample 1 is shown in Table 2.

[0091] Table 2 Element content of hardened coating of Sample 1

[0092]

[0093] Figure 4 The Fourier transform infrared spectroscopy (FTIR) diagram of the hardened coating 212a of Example 1 is shown. Figure 4 As shown, it can be seen that the wave number is lower than 1000 cm -1 There is an absorbance peak in the wavenumber range of , and the functional group corresponding to the peak is a silicon-oxygen bond (Si—O), that is, there is silicon element in the hardened coating 212 a, and a chemical bond is formed between the silicon element and the oxygen element.

[0094] Figure 5 The energy spectrum analysis diagram of the hardened coating 212a of Example 2 is shown. Figure 5 By performing energy spectrum analysis on the hardened coating 212a of Sample 2, the actual element content of the hardened coating 212a of Sample 2 can be obtained. The actual element content of the hardened coating 212a of Sample 2 is shown in Table 3.

[0095] Table 3 Element content of hardened coating of Sample 2

[0096]

[0097] Figure 6 The Fourier transform infrared spectrum of the hardened coating 212a of Example 2 is shown. Figure 6 As shown, it can be seen that the wave number is lower than 1000 cm -1 There is an absorbance peak in the wavenumber range, and the functional group corresponding to the peak is silicon-oxygen bond (Si-O), and it can be seen that the height of the peak is significantly higher than Figure 4 A sharp peak is shown, indicating that the silicon content in the hardened coating layer 212 a of Sample 2 is higher than that in the hardened coating layer 212 a of Sample 1.

[0098] Figure 7The energy spectrum analysis diagram of the hardened coating 212a of Sample 3 is shown. Figure 7 By performing energy spectrum analysis on the hardened coating 212a of Sample 3, the actual element content of the hardened coating 212a of Sample 3 can be obtained. The actual element content of the hardened coating 212a of Sample 3 is shown in Table 4.

[0099] Table 4 Element content of hardened coating of Sample 3

[0100]

[0101] Figure 8 The Fourier transform infrared spectrum of the hardened coating 212a of Sample 3 is shown. Figure 8 As shown, it can be seen that the wave number is lower than 1000 cm -1 There is no absorbance peak corresponding to the silicon-oxygen bond (Si—O) in the wavenumber range of , that is, there is no silicon element in the hardened coating layer 212 a.

[0102] Figure 9 The scanning electron microscopy (SEM) images of the hardened coating 212a of Sample 1, Sample 2, and Sample 3 are shown. Figure 9 , the white particles are silicon dioxide, thus Figure 9 It can be seen that the distribution density of the silicon dioxide particles in the hardened coating 212a of Sample 2 is higher than that of the hardened coating 212a of Sample 1 and the hardened coating 212a of Sample 3.

[0103] Table 5 shows the surface properties of Sample 1, Sample 2, Sample 3 and the comparative example, wherein the comparative example is the surface of the aluminum shell. It can be seen from Table 5 that the surface dyne value of the hardened coating 212a in Sample 2 is 28A and the water drop angle is 72.2288°. This is because the silicon content in the hardened coating 212a in Sample 2 exceeds 15%, and the excessively high silicon content affects the surface energy of its surface. Compared with the hardened coating 212a of Sample 1 and the hardened coating 212a of Sample 3, the interface bonding strength of the hardened coating 212a of Sample 2 is reduced by more than 50%. The hardened coating 212a of Sample 1 and the hardened coating 212a of Sample 3, by controlling the silicon content, make the surface bonding strength close to that of the aluminum material (shell 101 material), so that the surface of the polarizer 210 has adhesiveness.

[0104] Table 5 Comparison of surface properties of Sample 1, Sample 2, Sample 3 and Comparative Example

[0105]

[0106] In summary, by disabling the use of fluorine and controlling the content of silicon, the surface energy of the hardened coating layer 212 a can be increased, making it more adhesive.

[0107] Please continue to refer to Figure 2A As shown, a first gap 105 is defined between the edge of the non-display area 201a facing away from the display area 201b and the sidewall 101c of the second housing 101a. The cover 202 is disposed along the Z-direction over the polarizer 210 and the first gap 105. Optionally, the distance between the edge of the display area 201b and the sidewall 101c of the second housing 101a is 1.5 mm to 2.5 mm. That is, the distance W between the display area 201b and the sidewall 101c of the second housing 101a is 1.5 mm to 2.5 mm, thereby increasing the screen-to-body ratio of the display assembly 20.

[0108] The cover 202 has a first projection on the display screen. The first projection is away from the side of the first gap 105 and the distance between the first projection and the edge of the display area 201b is 0.3 mm-0.8 mm. Figure 10 A connection structure of a cover 202, a polarizer 210 and a display screen 201 is shown. Figure 10 , the distance D between the edge of the cover member 202 facing the display area 201b and the edge of the display area 201b is 0.3mm-0.8mm. In some embodiments, if processing accuracy and processing costs allow, the edge of the cover member 202 facing the display area 201b can also be flush with the edge of the display area 201b, thereby further reducing the width of the distance W between the display area 201b and the side wall 101c of the second housing 101a. It can be understood that since the cover member 202 needs to cover the non-display area 201a and the first gap 105, in this case, the length of the cover member 202 can be greater than the length of the non-display area 201a.

[0109] refer to Figure 10 As shown, the cover 202 and the polarizer 210 can be bonded together by a low-pressure adhesive 204. Specifically, the activation pressure of the low-pressure adhesive 204 is less than or equal to 10N. The activation pressure refers to the pressure required to achieve a firm bond between the low-pressure adhesive 204 and the polarizer 210, and between the low-pressure adhesive 204 and the cover 202. It is understood that the display screen 201 and the polarizer 210 are easily damaged when subjected to pressure. The smaller the activation pressure of the low-pressure adhesive 204, the smaller the force required to achieve a firm bond between the cover 202 and the polarizer 210, thereby protecting the polarizer 210 and the cover 202 to prevent the display screen 201 and / or the polarizer 210 from being damaged when the low-pressure adhesive 204 is activated.

[0110] Figure 11 A structure of a low pressure adhesive 204 is shown, referring to Figure 11 The low-pressure adhesive 204 includes a substrate 204a, and adhesive layers 204b are provided on two opposite surfaces of the substrate 204a along the Z direction. For example, the material of the substrate 204a can be one or more of polyethylene, polyvinyl chloride, polypropylene or polyethylene terephthalate.

[0111] For example, a microstructure is provided between the adhesive layer 204b and the substrate 204a, and the microstructure is used to increase the contact area between the adhesive layer 204b and the substrate 204a. Optionally, the microstructure can be micropores 204c. The micropores 204c exist between the adhesive layer 204b and the substrate 204a layer. The micropores 204c can arch the adhesive layer 204b so that the surface area of ​​the adhesive layer 204b is larger than the surface area of ​​the substrate 204a. When the low-pressure back adhesive 204 is activated, the micropores 204c are squeezed out, so that a larger contact area can be achieved between the adhesive layer 204b and the substrate 204a. At the same time, a larger contact area can also be achieved between the adhesive layer 204b and the bonded surface, such as the surface of the polarizer 210 or the surface of the cover 202, thereby improving the bonding reliability between the polarizer 210 and the cover 202.

[0112] In some embodiments, the peeling force of the adhesive layer 204b can be greater than or equal to 10N / cm 2 , to ensure the bonding strength between the polarizer 210 and the cover 202. In other embodiments, the shear strength of the low-pressure adhesive 204 can be greater than or equal to 1 MPa, allowing the low-pressure adhesive 204 to withstand greater shear forces, thereby better resisting relative sliding between the adherends and improving the shear resistance of the connection structure formed after the polarizer 210 and the cover 202 are bonded.

[0113] As an example, Table 6 shows the performance of three types of low-pressure adhesives 204. Types 1, 2, and 3 of the low-pressure adhesives 204 were bonded to the surface of the polarizer 210 (i.e., the hardened coating 212a) and to the surface of the aluminum housing to test the bonding performance of the low-pressure adhesives 204.

[0114] Table 6 Performance comparison of three low-pressure adhesives

[0115]

[0116] Table 6 shows that by disabling fluorine and controlling the silicon content, the surface energy of the hardened coating 212a can be increased. Furthermore, the use of a low-pressure adhesive 204 (such as polyethylene terephthalate adhesive) with a low activation pressure can enhance the surface adhesion of the polarizer 210. As shown in Table 6, by controlling the elemental composition of the hardened coating 212a on the polarizer 210 and selecting the low-pressure adhesive 204, the adhesion performance of the polarizer 210 surface can be brought close to that of the aluminum housing, thereby ensuring a reliable connection between the cover 202 and the polarizer 210.

[0117] Figure 12 Another cross-sectional structure of the display screen assembly 20 is shown, and the section line can be along Figure 1B BB in. Reference Figure 11 As shown, the display screen assembly 20 may further include a camera 205. The camera 205 has an optical acquisition end arranged along the Z direction. The optical acquisition end includes an optical acquisition portion 205a and a connecting portion 205b. The cover 202 is provided with a through hole 202a. The connecting portion 205b is bonded to the cover 202, and the through hole 202a exposes the optical acquisition portion 205a. In other words, the camera 205 can be connected to the cover 202 by bonding.

[0118] Generally, the camera 205 is often assembled to the second housing 101a through bonding, snapping, or other methods. This method requires first aligning the through-hole 202a in the cover 202 when assembling the display assembly 20. Specifically, the optical collection unit 205a of the camera 205 must be aligned with the through-hole 202a so that, after the display assembly 20 is mounted on the second housing 101a, the optical collection unit 205a can be exposed through the through-hole 202a. This method requires careful control of the dimensional tolerance of the through-hole 202a to prevent the optical collection unit 205a from being exposed.

[0119] By bonding the camera 205 to the cover 202, when assembling the display screen assembly 20, the camera 205 can be directly bonded to the cover 202 without having to align the optical acquisition portion 205a of the camera 205 with the through hole 202a. This eliminates the need to set assembly tolerances for the camera 205, thereby reducing the dimension L of the cover 202 along the Y direction and improving the assembly efficiency of the display screen assembly 20.

[0120] Through the above method, the cover 202 can be fixed without the need for a fixing bracket 104, thereby reducing the length L of the cover 202 and significantly shortening the distance W between the display area 201b of the display screen 201 and the side wall 101c of the second housing 101a, thereby improving the screen-to-body ratio. By controlling the elemental composition of the hardened coating 212a in the polarizer 210 and selecting the low-pressure adhesive 204, the bonding reliability between the cover 202 and the polarizer 210 can be ensured. In the display screen assembly 20 implemented based on the above method, the distance W between the display area 201b of the display screen 201 and the side wall 101c of the second housing 101a can be less than or equal to 2.15 mm. After the length of the covering member 202 is reduced and the overlapping area between the covering member 202 and the non-display area 201a is narrowed, for the laptop computer, the distance W between the display area 201b of the display screen 201 and the side wall 101c of the second shell 101a on opposite sides along the Y direction can be further reduced to less than or equal to 1.86 mm.

[0121] In the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0122] In the embodiments of the present application, it should be understood that the directional terms mentioned, such as "up", "down", "left", "right", "inside", "outside", etc., are only references to the directions in the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0123] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of the features.

[0124] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0125] In the embodiments of this application, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0126] In the embodiments of the present application, it should be noted that the descriptions "vertical" and "parallel" respectively represent approximately vertical and approximately parallel within a certain error range, and the error range can be a range where the deviation angle is less than or equal to 5°, 8° or 10° relative to absolute vertical and absolute parallel, respectively, and no specific limitation is made here.

[0127] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A display screen assembly, characterized in that: include: A display screen, comprising a display area and a non-display area, wherein the non-display area is located at an edge of the display screen and surrounds the display area; a polarizer, the polarizer being disposed on the display screen along a thickness direction of the display screen, wherein a water drop angle of the polarizer surface facing away from the display screen is less than or equal to 70°; a covering member, the covering member being disposed on the polarizer along the thickness direction and bonded to a portion of the surface of the polarizer, the covering member being configured to cover a first gap and at least a portion of the non-display area, the first gap being the gap between the edge of the display screen and the housing of the electronic device, the length of the covering member being related to the length of the non-display area; The polarizer includes a substrate and a coating, wherein the coating is arranged on a surface of the substrate facing away from the display screen, and the coating is constructed as the surface of the polarizer. The content of fluorine in the coating is less than or equal to 0.5%, and the content of silicon in the coating is less than or equal to 5%.

2. The display screen assembly according to claim 1, wherein: The display screen assembly further comprises a camera, wherein the camera has an optical collection end arranged along the thickness direction, and the optical collection end comprises an optical collection portion and a connecting portion; The cover is provided with a through hole, the connecting portion is bonded to the cover, and the optical collecting portion is exposed through the through hole.

3. The display screen assembly according to claim 1, wherein: The cover is bonded to the polarizer by a low-pressure adhesive, and the activation pressure of the low-pressure adhesive is less than or equal to 10N.

4. The display screen assembly according to claim 3, wherein: The low-pressure backing adhesive includes a substrate having a first surface and a second surface opposite to each other along the thickness direction, an adhesive layer is provided on the first surface and the second surface, and a microstructure is provided between the adhesive layer and the substrate, and the microstructure is used to increase the contact area between the adhesive layer and the substrate.

5. The display screen assembly according to claim 4, wherein: The microstructure is micropores.

6. The display screen assembly according to claim 4, wherein: The substrate is made of one of polyethylene, polyvinyl chloride, polypropylene or polyethylene terephthalate.

7. The display screen assembly according to claim 4, wherein: The peeling force of the adhesive layer is greater than or equal to 10N / cm 2 .

8. The display screen assembly according to claim 3, wherein: The shear strength of the low-pressure adhesive is greater than or equal to 1 MPa.

9. The display screen assembly according to claim 1, wherein: The length of the covering member is greater than the length of the non-display area.

10. The display screen assembly according to claim 9, wherein: The length of the covering member is 1.5 mm to 2.5 mm.

11. The display screen assembly according to claim 9 or 10, characterized in that: The covering member has a first projection on the display screen, the first projection is away from the side of the first gap, and the distance between the first projection and the edge of the display area is 0.3 mm-0.8 mm.

12. An electronic device, characterized in that: It comprises a housing and a display screen assembly according to any one of claims 1 to 11, wherein the display screen assembly is installed in the housing.

13. The electronic device according to claim 12, wherein: A first gap is formed between the edge of the display screen and the housing, and the covering member is arranged on the polarizer and the first gap along the thickness direction.

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