Display screen assembly and electronic equipment

Abstract

The invention relates to the technical field of electronic equipment, in particular to a display screen assembly and electronic equipment. The display screen assembly comprises a display screen, a polaroid and a covering piece, the display screen comprises a display area and a non-display area, and the non-display area is located on the edge of the display screen and surrounds the display area; the polaroid is arranged on the display screen along the thickness direction of the display screen; the water drop angle of the surface, deviating from the display screen, of the polaroid is smaller than or equal to 70 degrees; the covering piece is arranged on the polaroid in the thickness direction and is bonded with part of the surface of the polaroid; the covering piece is used for covering at least part of the non-display area and the first gap, and the first gap is a gap between the edge of the display screen and the shell of the electronic equipment. By means of the mode, the covering piece can be connected with the polaroid in a bonding mode, under the condition, a fixing support does not need to be arranged to fix the covering piece, and therefore the distance between the display area of the display screen and the side wall of the second shell is shortened, and the screen-to-body ratio is increased.

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 equipment technology, electronic devices equipped with display screens, such as TVs and laptops, have become an indispensable tool in people's work and daily life. At the same time, people's requirements for the performance and quality of electronic devices are also increasing. In particular, electronic devices with a high screen-to-body ratio are gradually becoming the darling of the market and are highly sought after by users because they can bring users a more immersive and transparent visual experience.

[0003] Currently, in the structural design of electronic devices, functional shading areas are commonly found at the edges of display screens. Taking the organic light emitting diode (OLED) display screen as an example, the edge of the OLED display screen is usually provided with a covering member (such as mylar), whose main function is to shield the assembly tolerance between the display screen and the electronic device housing, and to cover the wiring layout of the non-visible area of ​​the display screen. However, in order to achieve reliable fixation of the covering member, the traditional solution requires the addition of an annular fixing bracket around the display module. This structure increases the width of the unilateral shading area, thereby 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 disposed 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 disposed 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 a gap between an edge of the display screen and a 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 larger 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 to set a fixing bracket to fix 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 disposed on a surface of the substrate facing away from the display screen, the coating is constructed as the surface of the polarizer, and a content of fluorine 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 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, a content of silicon in the coating is less than or equal to 5%.

[0010] It is understandable that the silicon-containing filler that has undergone surface modification 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 also includes a camera, the camera has an optical collection end arranged along the thickness direction, the optical collection end includes 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, when assembling the display screen assembly, the camera can be assembled without accurately positioning the optical collection part in the camera and the through hole. In this case, the assembly tolerance of the camera can be reduced, thereby reducing the length of the cover and increasing the screen-to-body ratio. In addition, since precise positioning is not required during the assembly of the camera, the assembly efficiency of the display screen assembly can also be improved.

[0013] In a possible implementation manner of the first aspect, the cover member 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 adhesive, 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 adhesive is activated.

[0015] In a possible implementation of the first aspect, the low-pressure back glue includes a substrate, the substrate has 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 understandable that the microstructure using micropores can reduce the processing cost of low-pressure adhesive, thereby reducing the cost of display assembly. In addition, the microstructure using micropores can also reduce the complexity of the process of bonding the cover member to the polarizer.

[0019] In a possible implementation manner of the first aspect, the material of the substrate is 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, thereby reducing 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 manner 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 adhesive can be greater than or equal to 1 MPa, so that the low-pressure adhesive can withstand greater shear force, thereby better resisting relative sliding between adherends and improving the shear resistance of the connection structure obtained after the polarizer and the cover are bonded.

[0025] In a possible implementation manner 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 manner of the first aspect, the length of the covering piece is 1.5 mm-2.5 mm.

[0028] It can be understood that the length of the covering piece 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 manner of the first aspect, the cover has a first projection on the display screen, and 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, including 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 manner 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; Figure 1B A schematic diagram of a top view structure of a display screen assembly and a second housing provided in an embodiment of the present application; Figure 1C A schematic diagram of a three-dimensional structure of a display screen provided in an embodiment of the present application; Figure 1D A schematic diagram of a three-dimensional structure of a display screen assembly and a second shell provided in an embodiment of the present application; Figure 1E A schematic diagram of a three-dimensional structure of a polarizer provided in an embodiment of the present application; Figure 1F A schematic diagram of a laminated structure of a polarizer provided in an embodiment of the present application; Figure 1G A schematic cross-sectional structure diagram of a display screen assembly provided in an embodiment of the present application; Figure 2A A schematic diagram of the structure of a display screen assembly provided in an embodiment of the present application; Figure 2B A schematic diagram of the structure of a water drop angle on the surface of a polarizer provided in an embodiment of the present application; Figure 2C A schematic cross-sectional structure diagram of a display screen assembly provided in an embodiment of the present application; Figure 3 An energy spectrum analysis diagram of a hardened coating of Sample 1 provided in an embodiment of the present application; Figure 4 A Fourier transform infrared spectrum of a hardened coating of Sample 1 provided in an embodiment of the present application; Figure 5 The energy spectrum analysis intention of a hardened coating of Sample 2 provided in the embodiment of the present application; Figure 6 A Fourier transform infrared spectrum of a hardened coating of Sample 2 provided in an embodiment of the present application; Figure 7 An energy spectrum analysis diagram of a hardened coating of Sample 3 provided in an embodiment of the present application; Figure 8 A Fourier transform infrared spectrum of a hardened coating of Sample 3 provided in an embodiment of the present application; Fig. 9 Scanning electron microscope scans of hardened coatings of Sample 1, Sample 2, and Sample 3 provided in the embodiments of the present application; Fig.10 A schematic diagram of a connection structure of a cover, a polarizer and a display screen provided in an embodiment of the present application; Fig.11 A schematic diagram of the structure of a low-pressure adhesive provided in an embodiment of the present application; Fig.12 A schematic cross-sectional structure diagram of a display screen assembly provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] The specific implementation of the present application will be described in detail below with reference to the accompanying drawings.

[0036] The 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, vehicle-mounted devices, wearable devices, walkmans, radios, and other electronic devices 100. Among them, wearable devices include but are not limited to smart bracelets, smart watches, smart head-mounted displays, smart glasses, etc. In the following description, the electronic device 100 is taken as an example of a laptop computer.

[0037] See also Figure 1A , Figure 1AThe structure of an electronic device 100 is shown. The present application embodiment and the following embodiments are described by taking the electronic device 100 as a laptop computer as an example. For the convenience of description, in the following description, the X direction may be the width direction of the laptop computer, the Y direction may be the length direction of the laptop computer, and the Z direction may be the thickness direction of the laptop computer when it is folded. The X direction, the Y direction, and the Z direction may be perpendicular to each other.

[0038] refer to Figure 1A As shown, the electronic device 100 may include a housing 101, a keyboard 102, a touch panel 103 and a display screen assembly 20. The housing 101 is used to protect the internal components of the electronic device 100 and its material may be 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 screen 201 side.

[0039] The keyboard 102 may be disposed in the first housing 101b. The keyboard 102 is a main tool for the user to input instructions and data, and the keyboard 102 may include a plurality of keys. The touchpad 103 may also be disposed in the first housing 101b, and the touchpad 103 may realize the mouse function, and the touchpad 103 controls the cursor and performs operations by sensing the movement and click of the finger. The user may control the electronic device 100 through the keyboard 102 and the touchpad 103.

[0040] 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 A top view structure of the display screen assembly 20 and the second housing 101a is shown, referring to Figure 1B The display screen assembly 20 may include a display screen 201 and a cover 202. For example, the display screen 201 may be an OLED display screen 201. The OLED display screen 201 does not require a backlight source, so it can be made thinner and lighter, which is conducive to realizing an ultra-thin electronic device 100. The cover 202 is used to cover the assembly tolerance between the display screen 201 and the housing 101 of the electronic device 100, and to cover the wiring layout of the non-visible area of ​​the display screen 201. For example, the material of the cover 202 may be plastic or metal, such as polyethylene terephthalate, polyvinyl chloride, polycarbonate, polypropylene, polymethyl methacrylate, aluminum or aluminum alloy.

[0041] Figure 1C A three-dimensional structure of a display screen is shown, referring to Figure 1CThe display screen 201 may include a display area 201b and a non-display area 201a, wherein the non-display area 201a is located at the edge of the display screen 201 and surrounds the display area 201b. In practical applications, the display area 201b refers to an area of ​​the display screen 201 that can display images, texts and other information, and the non-display area 201a refers to a portion of the display screen 201 that is not directly used to display content, and it mainly supports, protects and assists the normal operation of the display area 201b.

[0042] The display screen assembly 20 may further include a polarizer 210. Figure 1D A three-dimensional structure of a display screen assembly 20 and a second housing 101a is shown. Figure 1D The polarizer 210 can be stacked on the surface of the display screen 201 along the Z direction. The polarizer 210 can convert natural light into polarized light. When external light shines on the surface of the display screen 201, the polarizer 210 can effectively reduce the intensity and amount of reflected light, reduce the interference of external light on the screen display content, and thus improve the display quality.

[0043] Figure 1E shows a three-dimensional structure of a polarizer, referring 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. The surface of the coating layer 212 is configured as one surface of the polarizer 210.

[0044] In some embodiments, the substrate 211 may include multiple functional layers stacked in layers. As an example, Figure 1F A stacked 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.

[0045] The adhesive layer 211a may be a pressure sensitive adhesive (PSA), which is used to achieve the connection between the polarizer 210 and the display screen 201. The optical compensation layer 211b (optical waveguide plate, OWP) is used to adjust the phase of light or reduce reflection. The first protective layer 211c and the second protective layer 211e are used to protect the polarizing layer 211d disposed between the first protective layer 211c and the second protective layer 211e. For example, the material of the first protective layer 211c and the second protective layer 211e may be triacetyl cellulose (TAC). The polarizing layer 211d is used to realize the polarization function of the polarizer 210, allowing light in a specific direction to pass through and blocking light in other directions. Optionally, the material of the polarizing layer 211d may be polyvinyl alcohol (PVA).

[0046] The coating 212 may be one or more of a hard coating 212a (HC), an anti-reflective coating (ARC), and an anti-glare coating (AGC). The coating 212 may be disposed on the surface of the second protective layer 211e away from the polarizing layer 211d. The components of the coating 212 are usually complex, and various additives or fillers are often added to increase the wear resistance, hardness, or smoothness of the surface.

[0047] For ease of description, the specific implementation of the coating 212 is introduced below by taking the hardened coating 212a as an example.

[0048] The hardened coating 212a can protect the surface of the polarizer 210, prevent scratches and wear, and ensure the durability and optical performance of the polarizer 210. The hardened coating 212a can be obtained by drying a hardened coating applied on the surface of the second protective layer 211e. The hardened coating can generally include components such as resin, inorganic filler, organic / inorganic hybrid resin, and photoinitiator.

[0049] Resin (e.g., polyurethane acrylate) is the main film-forming substance of the hardened coating 212a, providing basic properties. Inorganic fillers enhance the mechanical properties of the coating, such as fillers such as silica and alumina dispersed in the resin matrix, directly improving the surface hardness and wear resistance. Organic / inorganic hybrid resins are used to achieve synergistic enhancement of organic and inorganic materials. The structural stability of the hardened coating 212a can be improved by embedding nano inorganic particles (e.g., silica, alumina, etc.) into organic resins through chemical bonds or physical doping. Photoinitiators are used to trigger ultraviolet curing (UV) reactions to achieve rapid hardening of hardened coatings.

[0050] The hardening coating 212a mainly prevents scratches and abrasions 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 are often considered.

[0051] From the perspective of wear resistance, a fluorine-containing additive can be added to the hardened coating. The addition of more fluorine can make the surface of the hardened coating 212a smoother, and the fluorine and the resin have good cross-linking, which can enhance the structural stability of the hardened coating 212a. At the same time, wear-resistant particles can be added to the hardened coating. The wear-resistant particles have high hardness and wear resistance, can withstand external mechanical friction, and protect the underlying resin material from wear. In addition, during the curing process of the hardened coating, a nitrogen environment can be used to reduce the interference of oxygen on the curing reaction, thereby increasing the cross-linking density and surface hardness of the hardened coating, and further improving the wear resistance.

[0052] From the perspective of hardness performance, the resin can be a high-functional group resin, such as polyurethane acrylate with 8 or 10 functional groups. The high-functional group resin has more cross-linking sites, which can increase the cross-linking density, increase the rigidity, compressive strength and scratch resistance of the hardened coating 212a, and reduce plastic deformation. The inorganic filler can be particles with a high surface coverage rate to increase the filling density of the hardened coating 212a, thereby reducing the voids inside the hardened coating 212a and enhancing the mechanical strength and hardness of the coating. In addition, inorganic additives can be added to the hardened coating to improve the performance of the hardened coating.

[0053] In practical applications, fluorine-containing materials have low surface energy. After adding fluorine-containing additives to the hardened coating 212a, the surface adhesiveness of the hardened coating 212a is poor. In addition, fillers or additives containing silicon elements, such as fumed silica, mainly function to increase leveling properties. However, surface-modified silica often also has low surface energy, which makes the surface energy of the hardened coating 212a obtained after the hardening coating is hardened low, further reducing the surface adhesiveness of the hardened coating 212a.

[0054] In order to install the cover 202 , a fixing bracket 104 is usually used in the related art to fix the cover 202 .

[0055] Specifically, Figure 1G A cross-sectional structure of a display screen assembly 20 is shown, and the section line may 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-like structure with an opening at one end, and the display screen 201 may be installed in the second shell 101a through the opening.

[0056] refer to Figure 1G As shown, a circle of fixing brackets 104 is provided along the side wall 101c of the second shell 101a, and 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 shell 101a. The fixing brackets 104 can be a step-shaped structure, and the step-shaped structure has a step surface 104a.

[0057] refer to Figure 1G As shown, there is a gap 105a between the edge of the non-display area 201a away from the display area 201b and the support portion, and the cover 202 is arranged on the polarizer 210 and the gap 105a along the Z direction. That is, the cover 202 can cover the non-display area 201a and the gap between the display screen 201 and the fixed bracket 104, thereby improving the appearance quality of the display screen assembly 20. Part of the lower surface of the cover 202 (facing the side wall 101c) can be arranged on the step surface 104a. Exemplarily, part of the lower surface of the cover 202 can be bonded to the step surface 104a, for example, by glue or tape. In some embodiments, the cover 202 can also be connected to the step surface 104a by other means, such as welding, clamping, etc.

[0058] refer to Figure 1G As shown, the height of the step surface 104a of the fixing bracket 104 is equal to or slightly higher than the height of the display screen 201 and the polarizer 210 after being stacked, and the remaining lower surface of the cover 202 (i.e., the lower surface of the portion other than that disposed on the step surface 104a) can be disposed above the polarizer 210, and the remaining lower surface of the cover 202 can partially cover the non-display area 201a in the display screen 201. For example, the distance between the edge of the side 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 0.3mm-0.8mm. In some embodiments, the remaining lower surface of the cover 202 can also completely cover the non-display area 201a in 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.

[0059] It can be understood that due to the existence 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 .

[0060] In view of this, an embodiment of the present application provides a display screen assembly 20, Figure 2A The structure of a display screen assembly 20 is shown, 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 Figure 1C As shown). The polarizer 210 is arranged on the display screen 201 along the Z direction of the display screen 201, and the water drop angle of the surface of the polarizer 210 away from the display screen 201 is less than or equal to 70°. The cover 202 is arranged on the polarizer 210 and the first gap 105 along the Z direction, and is bonded to a part of the surface of the polarizer 210. The first gap 105 is the gap between the edge of the display screen 201 and the housing 101 of the electronic device 100. The length of the cover 202 is related to the length of the non-display area 201a. In this way, the screen ratio of the display screen assembly 20 can be improved.

[0061] Figure 2B A schematic diagram of the structure of a water drop angle on the surface of a polarizer 210 is shown, referring to 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 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 larger 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 set a fixing bracket 104 to fix 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 shell 101a, thereby increasing the screen ratio.

[0062] The following is a detailed description of the display screen assembly 20 provided in the embodiment of the present application in conjunction with the accompanying drawings. For ease of description, in the following description, the OLED display screen 201 is used as an example of the display screen 201, and the hardened coating 212a is used as an example of the layer to describe the specific implementation of the display screen assembly 20 provided in the present application.

[0063] refer to Figure 2A As shown, Figure 1D The difference of the display screen assembly 20 shown is that the cover member 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.

[0064] As described above, the polarizer 210 may include a substrate 211 and a hardening coating 212a, the hardening coating 212a is disposed on the surface of the substrate 211 away from the display screen 201, and the hardening coating 212a is configured as the surface of the polarizer 210. In the embodiment of the present application, the water drop angle of the surface of the polarizer 210 away from the display screen 201 is less than or equal to 70°. That is, the hardening coating 212a has a higher surface energy.

[0065] Exemplarily, since the surface energy of the fluorine-containing material is relatively low, in order to improve the surface energy of the hardened coating 212a, the fluorine element may be disabled in the hardened coating 212a. Optionally, the content of the fluorine element in the hardened coating 212a is less than or equal to 0.5%. For the hardened coating, the main function of the fluorine-containing additive is to improve the surface slipperiness of the obtained hardened coating 212a. After the fluorine element is disabled, 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, a phosphate additive may be used to improve the slipperiness of the surface of the hardened coating 212a.

[0066] For example, in order to improve the surface adhesiveness of the hardening coating 212a, the content of silicon in the hardening coating 212a also needs to be controlled. Optionally, the content of silicon in the hardening coating 212a is less than or equal to 5%. The role of silicon-containing fillers, such as fumed silica, in the hardening coating is to increase the leveling properties of the hardening coating. Other leveling fillers can be used to replace silicon-containing fillers, such as using barium sulfate fillers to replace fumed silica, so that the leveling properties of the hardening coating can achieve the same effect.

[0067] By disabling the fluorine element in the hardening coating 212a (ie, the fluorine element is less than or equal to 0.5%) and controlling the silicon element content in the hardening coating 212a, the surface energy of the hardening coating 212a can be greatly improved, making the surface adhesive.

[0068] 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.

[0069] Table 1 Element contents of hardened coatings of three samples

[0070] Figure 3 The energy dispersive spectroscopy (EDS) diagram of the hardened coating 212 a 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.

[0071] Table 2 Element content of hardened coating of sample 1

[0072] Figure 4 The Fourier transform infrared spectroscopy (FTIR) diagram of the hardened coating 212 a of Example 1 is shown. Figure 4 As shown, it can be seen that the wave number is below 1000cm -1 There is an absorbance peak in the wave number 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 hardening coating 212 a, and a chemical bond is formed between the silicon element and the oxygen element.

[0073] 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.

[0074] Table 3 Element content of hardened coating of Sample 2

[0075] 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 below 1000cm -1 There is an absorbance peak in the wavenumber range. The functional group corresponding to the peak is Si-O bond (Si-O). It can be seen that the height of the peak is significantly higher than Figure 4 A peak is shown, that is, the silicon content in the hardened coating 212 a of Example 2 is higher than the silicon content in the hardened coating 212 a of Example 1.

[0076] Figure 7 The energy spectrum analysis diagram of the hardened coating 212a of Example 3 is shown. Figure 7By 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.

[0077] Table 4 Element content of hardened coating of Sample 3

[0078] Figure 8 The Fourier transform infrared spectrum of the hardened coating 212a of Example 3 is shown. Figure 8 As shown, it can be seen that the wave number is below 1000cm -1 There is no absorbance peak corresponding to the silicon-oxygen bond (Si—O) in the wave number range of , that is, there is no silicon element in the hardened coating 212 a.

[0079] Fig. 9 The scanning electron microscopy (SEM) images of the hardened coating 212a of Sample 1, Sample 2, and Sample 3 are shown. Fig. 9 , the white particles are silicon dioxide, thus Fig. 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.

[0080] 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 excessive 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 content of silicon, 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.

[0081] Table 5 Surface performance comparison of sample 1, sample 2, sample 3 and comparative example

[0082] In summary, by disabling the use of fluorine and controlling the content of silicon, the surface energy of the hardened coating 212 a can be increased, making it adhesive.

[0083] Please continue to refer to Figure 2AAs shown, there is a first gap 105 between the edge of the non-display area 201a away from the display area 201b and the side wall 101c of the second housing 101a, and the cover 202 is arranged on the polarizer 210 and the first gap 105 along the Z direction. Optionally, the distance between the edge of the display area 201b and the side wall 101c of the second housing 101a is 1.5mm-2.5mm. That is, the size of the distance W between the display area 201b and the side wall 101c of the second housing 101a is 1.5mm-2.5mm, thereby improving the screen ratio of the display screen assembly 20.

[0084] 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. Fig.10 A connection structure of a cover 202, a polarizer 210 and a display screen 201 is shown. Fig.10 , the distance D between the edge of one side of the cover 202 facing the display area 201b and the edge of the display area 201b is 0.3mm-0.8mm. In some embodiments, if the processing accuracy and processing cost allow, the edge of one side of the cover 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 shell 101a. It can be understood that since the cover 202 needs to cover the non-display area 201a and the first gap 105, in this case, the length of the cover 202 can be greater than the length of the non-display area 201a.

[0085] refer to Fig.10 As shown, the cover 202 and the polarizer 210 can be bonded by the 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 can be 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 to achieve a firm bond between the cover 202 and the polarizer 210, thereby protecting the polarizer 210 and the cover 202, so as to avoid damage to the display screen 201 and / or the polarizer 210 when the low-pressure adhesive 204 is activated.

[0086] Fig.11 A structure of a low-pressure adhesive 204 is shown, referring to Fig.11The low-pressure adhesive backing 204 includes a substrate 204a, and adhesive layers 204b are provided on two surfaces of the substrate 204a that are opposite to each other along the Z direction. Exemplarily, the material of the substrate 204a can be one or more of polyethylene, polyvinyl chloride, polypropylene or polyethylene terephthalate.

[0087] 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 may be micropores 204c. The micropores 204c exist between the adhesive layer 204b and the substrate 204a layer, and the micropores 204c may arch the adhesive layer 204b so that the surface area of ​​the adhesive layer 204b is greater 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.

[0088] In some embodiments, the peeling force of the adhesive layer 204b may 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 may be greater than or equal to 1 MPa, so that the low-pressure adhesive 204 can withstand a 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 210 and the cover 202 are bonded.

[0089] As an example, Table 6 shows the performance of three types of low-pressure adhesives 204. The three types of low-pressure adhesives 204, Model 1, Model 2 and Model 3, are respectively bonded to the surface of the polarizer 210 (i.e., the hardened coating 212a) and the surface of the aluminum housing to test the bonding performance of the low-pressure adhesive 204.

[0090] Table 6 Performance comparison of three low-pressure adhesives

[0091] It can be seen from Table 6 that by disabling the use of fluorine and controlling the content of silicon, the surface energy of the hardened coating 212a can be increased, and by using a low-pressure adhesive 204 (such as polyethylene terephthalate adhesive) with a low activation pressure, the surface bonding performance of the polarizer 210 can be improved. Referring to Table 6, by controlling the element composition of the hardened coating 212a in the polarizer 210 and selecting the low-pressure adhesive 204, the bonding performance of the surface of the polarizer 210 can be close to that of the aluminum housing surface, thereby ensuring the connection reliability between the cover 202 and the polarizer 210.

[0092] Fig.12 Another cross-sectional structure of a display screen assembly 20 is shown, and the section line may be along Figure 1B BB in. Reference Fig.11 As shown, the display screen assembly 20 may further include a camera 205, the camera 205 having an optical collection end arranged along the Z direction, the optical collection end including an optical collection portion 205a and a connecting portion 205b. A through hole 202a is provided on the cover 202, the connecting portion 205b is bonded to the cover 202, and the through hole 202a exposes the optical collection portion 205a. In other words, the camera 205 may be connected to the cover 202 by bonding.

[0093] Generally speaking, the camera 205 is often assembled on the second housing 101a by bonding, clamping, etc. In this way, when assembling the display screen assembly 20, it is necessary to first position the through hole 202a in the cover 202, that is, it is necessary to align the optical collection part 205a in the camera 205 with the through hole 202a, so that after the display screen assembly 20 is installed on the second housing 101a, the optical collection part 205a can be exposed from the through hole 202a. It can be understood that this method requires the dimensional tolerance of the through hole 202a to be controlled to prevent the optical collection part 205a from being unable to be exposed from the through hole 202a.

[0094] 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 aligning the optical collection portion 205a in the camera 205 with the through hole 202a. In this case, there is no need to set an assembly tolerance 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.

[0095] In the above manner, the cover 202 can be fixed without setting the fixing bracket 104, so that the length L of the cover 202 can be reduced, and the distance W between the display area 201b of the display screen 201 and the side wall 101c of the second shell 101a is greatly shortened, thereby improving the screen ratio. By controlling the element composition of the hardening 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 shell 101a can be less than or equal to 2.15mm. 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 a 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.

[0096] 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.

[0097] 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 of 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 referred device or element 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.

[0098] In the embodiments of the present application, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features.

[0099] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0100] In the embodiments of the present application, "and / or" is only a description of the association relationship of the 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.

[0101] 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 may be a range in which 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.

[0102] 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, the display screen comprising a display area and a non-display area, the non-display area is located at an edge of the display screen and surrounds the display area; A polarizer, wherein the polarizer is disposed on the display screen along a thickness direction of the display screen, and a water drop angle of the surface of the polarizer facing away from the display screen is less than or equal to 70°; A covering member, wherein the covering member is arranged on the polarizer along the thickness direction and bonded to a portion of the surface of the polarizer, and the covering member is used to cover a first gap and at least a portion of the non-display area, wherein the first gap is a gap between an edge of the display screen and a housing of the electronic device, and the length of the covering member is related to the length of the non-display area.

2. The display screen assembly according to claim 1, characterized in that: 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, the coating is constructed as the surface of the polarizer, and the content of fluorine element in the coating is less than or equal to 0.5%.

3. The display screen assembly according to claim 2, characterized in that: The content of silicon in the coating is less than or equal to 5%.

4. The display screen assembly according to any one of claims 1 to 3, characterized in that: 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 part and a connecting part; 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.

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

6. The display screen assembly according to claim 5, characterized in that: The low-pressure back glue includes a substrate, which has 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.

7. The display screen assembly according to claim 6, characterized in that: The microstructure is micropores.

8. The display screen assembly according to claim 6, characterized in that: The material of the substrate is one of polyethylene, polyvinyl chloride, polypropylene or polyethylene terephthalate.

9. The display screen assembly according to claim 6, characterized in that: The peeling force of the adhesive layer is greater than or equal to 10N / cm 2 .

10. The display screen assembly according to claim 5, characterized in that: The shear strength of the low-pressure adhesive is greater than or equal to 1 MPa.

11. The display screen assembly according to claim 1, characterized in that: The length of the covering member is greater than the length of the non-display area.

12. The display screen assembly according to claim 11, characterized in that: The length of the covering piece is 1.5 mm-2.5 mm.

13. The display screen assembly according to claim 11 or 12, characterized in that: The cover has a first projection on the display screen, and the first projection is away from a 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.

14. An electronic device, characterized in that: It comprises a shell and a display screen assembly as described in any one of claims 1 to 13, wherein the display screen assembly is installed in the shell.

15. The electronic device according to claim 14, characterized in that: A first gap is provided 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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