Display panel cover plate and display screen

Abstract

The invention provides a display panel cover plate and a display screen, the display panel cover plate comprises a first film layer, a buffer layer and a second film layer which are stacked in sequence, and the first film layer covers the surface of a display panel; the buffer layer is used for absorbing impact stress through elastic deformation; the buffer layer comprises a first elastic body and a second elastic body, and the first elastic body and the second elastic body are strip-shaped; wherein a plurality of first elastic bodies and a plurality of second elastic bodies are arranged, the plurality of first elastic bodies are arranged at intervals, and the plurality of second elastic bodies are arranged at intervals; and along the thickness direction of the display panel, the height of the first elastomer is greater than that of the second elastomer, and the modulus of the first elastomer is greater than that of the second elastomer. The folding screen module solves the problems that due to the design of an existing folding screen module, the impact resistance and deformation resistance of the folding screen module are weak, a screen body is prone to being damaged, and display is abnormal.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a cover plate for a display panel and a display screen. Background Art

[0002] This new form of mobile phone with a flexible folding screen brings a brand-new user experience. However, due to the stacked design of the folding screen module (especially the design of the screen cover plate), a large amount of flexible polymer materials are required, and their stiffness and strength are far inferior to the inorganic materials (such as cover glass) used in straight-bar mobile phones and curved-screen mobile phones. As a result, their ability to resist impact and deformation is very weak, the probability of damage to the screen body increases sharply, the display appears abnormal, and the user experience is greatly reduced. Summary of the Invention

[0003] Embodiments of this application provide a cover plate for a display panel and a display screen, which solve the problem that the existing design of the folding screen module leads to weak resistance to impact and deformation, easy damage to the screen body, and abnormal display.

[0004] The present invention is implemented as follows. A cover plate for a display panel includes a first film layer, a buffer layer, and a second film layer. The first film layer covers the surface of the display panel; the buffer layer is disposed on the surface of the first film layer facing away from the display panel, and the buffer layer is used to absorb impact stress through elastic deformation; the second film layer covers the surface of the buffer layer facing away from the first film layer; the buffer layer includes a first elastic body and a second elastic body, and both the first elastic body and the second elastic body are strip-shaped; wherein, there are multiple first elastic bodies and multiple second elastic bodies, and the multiple first elastic bodies are arranged at intervals, and the multiple second elastic bodies are arranged at intervals; and along the thickness direction of the display panel, the height of the first elastic body is greater than the height of the second elastic body, and the elastic modulus of the first elastic body is greater than the elastic modulus of the second elastic body.

[0005] In one embodiment, the multiple first elastic bodies and the multiple second elastic bodies cross each other;

[0006] Preferably, the arrangement direction of the multiple first elastic bodies is perpendicular to the arrangement direction of the multiple second elastic bodies.

[0007] In one embodiment, along the arrangement direction of the multiple first elastic bodies, both side surfaces of the first elastic body are flat.

[0008] In one embodiment, along the arrangement direction of the multiple second elastic bodies, both side surfaces of the second elastic body are flat.

[0009] In one embodiment, along the arrangement direction of the plurality of first elastomers, both side surfaces of the first elastomer are wavy surfaces.

[0010] In one embodiment, along the arrangement direction of the plurality of second elastomers, both side surfaces of the second elastomer are wavy surfaces.

[0011] In one embodiment, the plurality of first elastomers are arranged at equal intervals;

[0012] The plurality of second elastomers are arranged at equal intervals.

[0013] In one embodiment, the elastic modulus of the first elastomer is 300 kPa to 800 kPa; the elastic modulus of the second elastomer is 20 kPa to 50 kPa.

[0014] In one embodiment, along the thickness direction of the display panel, the height of the first elastomer is 4 / 5 to 9 / 10 times the height of the second elastomer.

[0015] In one embodiment, the second film layer includes glass fibers, and the proportion of the glass fibers in the second film layer is greater than 10%;

[0016] The elastic modulus of the second film layer is greater than 10 GPa.

[0017] In one embodiment, the buffer layer includes a polyurethane material, and along the thickness direction of the display panel, the thickness of the buffer layer is 0.03 mm to 0.1 mm.

[0018] An embodiment of the present application further provides a display screen, including a display panel and a display panel cover plate as described in any one of the above embodiments, and the display panel cover plate covers the surface of the display panel;

[0019] In one embodiment, the display screen is a flexible screen.

[0020] The beneficial effects of the display panel cover plate and the display screen provided by this application are as follows: Compared with the prior art, in this application, a buffer layer is provided between the first film layer and the second film layer. The structure of the buffer layer is set to include strip-shaped first elastic bodies and strip-shaped second elastic bodies, and there are multiple first elastic bodies and multiple second elastic bodies. The multiple first elastic bodies and the multiple second elastic bodies are arranged at intervals respectively, and the multiple first elastic bodies and the multiple second elastic bodies cross each other. The buffer layer can absorb impact stress, thereby improving the impact resistance of the screen cover plate. In addition, when setting the buffer layer, the height of the first elastic body is set to be greater than the height of the second elastic body, and the elastic modulus of the first elastic body is greater than the elastic modulus of the second elastic body. In this way, when the second film layer is subjected to an impact force, the first elastic body will first undergo elastic deformation, achieving a better anti-impact effect. If the impact force is large, after the first elastic body deforms, the second elastic body will also undergo elastic deformation to better absorb the impact energy. In this way, the buffering capacity of the buffer layer can be greatly improved, and the impact resistance of the screen cover plate can be greatly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the display screen provided by an embodiment of this application;

[0022] Figure 2 is a schematic structural diagram of the display panel cover plate provided by an embodiment of this application;

[0023] Figure 3 is a schematic structural diagram of the buffer layer of the display panel cover plate provided by an embodiment of this application disposed on the first film layer;

[0024] Figure 4 is a simplified arrangement structure diagram of the first elastic body and the second elastic body of the buffer layer of the display panel cover plate provided by an embodiment of this application Figure 1 ;

[0025] Figure 5 is a simplified arrangement structure diagram of the first elastic body and the second elastic body of the buffer layer of the display panel cover plate provided by an embodiment of this application Figure 2 ;

[0026] Figure 6 is a simplified arrangement structure diagram of the first elastic body and the second elastic body of the buffer layer of the display panel cover plate provided by an embodiment of this application Figure 3 ;

[0027] Figure 7 is a simplified arrangement structure diagram of the first elastic body and the second elastic body of the buffer layer of the display panel cover plate provided by an embodiment of this application Figure 4 。

[0028] Reference numerals: 10, display panel; 20, display panel cover plate;

[0029] 21. The first film layer; 22. The buffer layer; 221. The first elastomer; 222. The second elastomer; 23. The second film layer. Detailed implementation manners

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, 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 thus should not be construed as a limitation to the present application.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0034] It should also be noted that in the embodiments of the present application, the same reference numerals are used to represent the same components or the same parts. For the same parts in the embodiments of the present application, only one of the parts or components may be marked with a reference numeral in the figure. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0035] With the explosive growth of electronic devices such as smartphones or tablets (portable equipment, PAD), the functions of electronic devices are becoming more and more diverse. The different display screen areas of electronic devices will result in different usage experiences of related functions of electronic devices. The display area of the display screen of electronic devices is getting larger and larger. However, when the display screen area is relatively large, the overall size of the electronic device will be relatively large, resulting in the problem of inconvenient carrying. In related technologies, a flexible display module includes a flexible display screen and a backplane. Compared with traditional screens, flexible display screens have significant advantages. For example, flexible display screens are bendable and flexible, so they can be applied to foldable electronic devices to achieve flexible changes in the display area. At the same time, the size of the folded electronic device itself is small and easy to carry.

[0036] However, in the prior art, in order to achieve the foldable effect of the flexible display screen, a large amount of flexible polymer materials are required in the module design of the flexible display screen (especially the design of the flexible cover plate). The flexible cover plate material requires flexibility (foldable), hardness and wear resistance (physical contact), anti-fingerprint, and optical properties (transparency) at the same time. It has high barriers and high value, and has become a key material affecting the future development of foldable displays. At present, the production materials of the flexible cover plate of the flexible display screen usually adopt CPI (Colorless Polyimide, Chinese name: transparent polyimide), UTG (Ultra-Thin Glass, Chinese name: ultra-thin flexible glass), PET (Polyethylene terephthalate, Chinese name: polyethylene terephthalate), etc. The structure of the flexible cover plate is mainly a single CPI or a combination of PET and UTG. A single CPI means directly using CPI to make the entire flexible cover plate, and the combination of PET and UTG means that PET and UTG are stacked. Specifically, UTG can be arranged closely to the flexible screen. When the flexible cover plate of the folding screen is subjected to an impact force, the flexible cover plate made of a single CPI material is prone to pits or depressions, and pits or depressions are likely to appear on the PET layer of the flexible cover plate with PET and UTG stacked, resulting in fragmentation of the UTG layer, increasing the risk of fragmentation of the flexible screen of the folding screen.

[0037] CPI is a high-performance polymer material with high transparency, high heat resistance (can withstand high temperatures above 300°C), high mechanical strength, and excellent softness and scratch resistance. PET is a thermoplastic polyester material, commonly known as polyester resin. It is made from terephthalic acid and ethylene glycol through a condensation reaction. Together with PBT (polybutylene terephthalate), it is collectively referred to as thermoplastic polyester or saturated polyester. PET has excellent creep resistance, fatigue resistance, abrasion resistance and dimensional stability, as well as high hardness and good toughness. UTG is a flexible and bendable glass material with a thickness of usually less than 100 microns (0.1 mm) and can be bent arbitrarily without breaking when only subjected to external force. UTG has high light transmittance and excellent optical quality, which can provide users with a clearer and more delicate visual experience, while improving the speed and accuracy of under-screen fingerprint recognition.

[0038] The embodiments of the present application provide a display panel cover and a display screen, which solve the problem that the design of the existing folding screen module causes its ability to resist impact and deformation to be very weak, and the screen body is easily damaged, resulting in abnormal display.

[0039] refer to Figure 1 An embodiment of the present application provides a display screen, which can be applied to an electronic device. The electronic device can be a common mobile terminal such as a mobile phone or a tablet computer, and the electronic device has a folded state and an unfolded state; in the folded state, the display screen is bent together with the electronic device; in the unfolded state, the display screen is unfolded into a plane together with the electronic device.

[0040] The display screen includes a display panel 10 and a display panel cover 20 covering the surface of the display panel 10. The display screen also includes a support component. The display panel 10 can be an integrated flexible display screen, or a display screen composed of two rigid screens and a display panel 10 located between the two rigid screens; the support component supports the display panel 10, and the display panel cover 20 covers the side of the display panel 10 away from the support component, that is, the display panel cover 20 is attached to the outer surface of the display panel 10, and the display panel cover 20 protects the display panel 10 and improves the flatness of the surface of the display panel 10. The display panel cover 20 is light-transmissive, and the image displayed by the display panel 10 can be seen through the display panel cover 20, and the display panel cover 20 can be folded or flattened synchronously with the display panel 10 to adapt to the switching of the folding screen module between the unfolded state and the folded state.

[0041] Among them, the display panel cover 20, as a protective layer of the display panel, plays the most critical role in the impact resistance of the display screen. Therefore, the structural optimization of the display panel cover 20 naturally becomes one of the important improvement directions for improving the impact performance of the display screen.

[0042] Reference Figure 2 ,The cover plate 20 of the display panel provided in the embodiment of the present application is used to cover the display panel 10 and can be folded together with the display panel 10. The cover plate 20 of the display panel includes a first film layer 21, a buffer layer 22, and a second film layer 23. The first film layer 21, the buffer layer 22, and the second film layer 23 are stacked in sequence to form a stacked structure design, so that the cover plate 20 of the display panel forms a continuous surface structure, improving the appearance of the display screen.

[0043] Among them, the first film layer 21 covers the surface of the display panel 10; the buffer layer 22 is disposed on the surface of the first film layer 21 facing away from the display panel 10, and the second film layer 23 covers the surface of the buffer layer 22 facing away from the first film layer 21; the buffer layer 22 is used to absorb impact stress through elastic deformation, thereby protecting the display panel 10, and can greatly improve the impact resistance of the display screen.

[0044] Reference Figure 2 and Figure 3 ,The buffer layer 22 includes a first elastomer 221 and a second elastomer 222, and both the first elastomer 221 and the second elastomer 222 are strip-shaped; there are multiple first elastomers 221 and multiple second elastomers 222, and the multiple first elastomers 221 are arranged at intervals of each other, and the multiple second elastomers 222 are arranged at intervals of each other; along the thickness direction Z of the display panel 10, the height of the first elastomer 221 is greater than the height of the second elastomer 222, and the elastic modulus of the first elastomer 221 is greater than the elastic modulus of the second elastomer 222.

[0045] It should be noted that the buffer layer 22 in the cover plate 20 of the display panel in the embodiment of the present application is arranged such that multiple first elastomers 221 and multiple second elastomers 222 are arranged at intervals of each other, which can make the buffer layer 22 absorb the impact force received by the cover plate 20 of the display panel more evenly, thereby improving the resistance of the cover plate 20 of the display panel to the impact force. In addition, in the thickness direction Z of the display panel 10, the height of the first elastomer 221 is set to be greater than the height of the second elastomer 222, and the elastic modulus of the first elastomer 221 is greater than the elastic modulus of the second elastomer 222. In this way, the second film layer 23 is in close contact with the first elastomer 221. When the second film layer 23 is subjected to an impact force, the first elastomer 221 will undergo elastic deformation to resist the impact force received by the second film layer 23. Since the first elastomer 221 and the second elastomer 222 cross each other, when the first elastomer 221 resists the impact force, the second elastomer 222 will absorb the impact force, thereby better preventing the impact force from hitting the display panel 10 and causing the display panel 10 to be damaged, playing a good protective role for the display panel 10.

[0046] In the embodiments of the present application, the plurality of first elastomers 221 are arranged at intervals. It is possible that the extending directions of each of the plurality of first elastomers 221 are parallel to each other. The distance between any two adjacent first elastomers 221 may be the same or different, and the embodiments of the present application do not make specific limitations. Similarly, the plurality of second elastomers 222 are arranged at intervals. It is possible that the extending directions of each of the plurality of second elastomers 222 are parallel to each other. The distance between any two adjacent second elastomers 222 may be the same or different, and the embodiments of the present application do not make specific limitations.

[0047] In some embodiments, the buffer layer 22 includes a polyurethane material, which can bond the first film layer 21 and the second film layer 23 together through the buffer layer 22 to form a complete display panel cover 20.

[0048] It can be understood that polyurethane (PU), whose full name is polyisocyanate, is a polymer material formed by the polycondensation reaction of polyols and polyisocyanates and has excellent mechanical properties and extremely strong plasticity. It has better stability, chemical resistance, resilience and mechanical properties, and has smaller compression deformation; it has good heat insulation, sound insulation, earthquake resistance and gas poisoning resistance; rigid polyurethane plastics are light in weight, have excellent sound insulation and heat insulation properties, are resistant to chemical drugs, have good electrical properties, are easy to process, and have low water absorption; polyurethane elastomers have properties between plastics and rubbers, are oil-resistant, wear-resistant, low-temperature resistant, aging-resistant, have high hardness and elasticity.

[0049] It can be understood that the buffer layer 22 includes a polyurethane material, which is equivalent to that both the first elastomer 221 and the second elastomer 222 include a polyurethane material. Among them, the content of the hard segment monomer in the polyurethane material included in the first elastomer 221 is greater than the content of the hard segment monomer in the polyurethane material included in the second elastomer 222. In this way, the properties of the first elastomer 221 and the second elastomer 222 can be different, so that the elastic modulus of the first elastomer 221 is greater than that of the second elastomer 222. In this way, the first elastomer 221 can have better performance in resisting impact force. At the same time, the second elastomer 222 can have better ability to absorb impact force. In this way, when the second film layer 23 is impacted, it can be buffered through the buffer layer 22 to effectively avoid damage to the display panel 10 caused by the impact force.

[0050] In the embodiments of the present application, the first film layer 21 covers the display panel 10 and can be made of UTG material. The second film layer 23 covers the buffer layer 22 and is used to receive external impact forces, and can be made of CPI material or PET material. Since the elastic force of the CPI material is better than that of the PET material, the CPI material is used to make the second film layer 23 in the embodiments of the present application. When manufacturing the display panel cover plate 20, an independent UTG film layer and a CPI film layer are first manufactured, and then a polyurethane material is sprayed or printed on the UTG film layer to form the buffer layer 22. Finally, the CPI film layer is covered on the buffer layer 22 to obtain the display panel cover plate 20.

[0051] Specifically, the manufacturing method of the buffer layer 22 is as follows: A polyurethane material is sprayed or printed on the UTG film layer to form a plurality of strip-shaped second elastic bodies 222. During the formation of the second elastic bodies 222, it is necessary to pay attention to the fact that the content of hard segment monomers in the polyurethane material is relatively low. Then, the polyurethane material is sprayed or printed on the UTG film layer again to form a plurality of strip-shaped first elastic bodies 221. During the formation of the first elastic bodies 221, it is necessary to pay attention to the fact that the content of hard segment monomers in the polyurethane material is relatively high.

[0052] Of course, it is also possible to first spray or print a polyurethane material on the UTG film layer to form a plurality of strip-shaped first elastic bodies 221. During the formation of the first elastic bodies 221, it is necessary to pay attention to the fact that the content of hard segment monomers in the polyurethane material is relatively high. Then, the polyurethane material is sprayed or printed on the UTG film layer again to form a plurality of strip-shaped second elastic bodies 222. During the formation of the second elastic bodies 222, it is necessary to pay attention to the fact that the content of hard segment monomers in the polyurethane material is relatively low.

[0053] In some embodiments, referring to Figure 3 and Figure 4 , a plurality of first elastic bodies 221 and a plurality of second elastic bodies 222 intersect with each other. This can enable the buffer layer 22 to absorb the impact forces received by the display panel cover plate 20 more evenly, thereby improving the resistance of the display panel cover plate 20 to impact forces.

[0054] It should be noted that the first elastic body 221 and the second elastic body 222 cross each other. It can be regarded as setting a plurality of slots on the first elastic body 221. The width of each slot is equal to the dimension of the second elastic body 222 in the arrangement direction of the plurality of second elastic bodies 222, and the depth of each slot is equal to the dimension of the second elastic body 222 in the thickness direction Z of the display panel 10. The first elastic body 221 is inserted on the second elastic body 222 through the slots, and the plurality of slots correspond to the plurality of second elastic bodies 222 one by one. This can not only ensure that the first elastic body 221 contacts the first film layer 21 after being inserted on the second elastic body 222, but also enable the first elastic body 221 to contact the plurality of second elastic bodies 222, so as to evenly transfer the impact force borne by the first elastic body 221 to the plurality of second elastic bodies 222, so that the second elastic body 222 can absorb the impact force energy more evenly and quickly, and improve the impact resistance of the display panel cover plate 20.

[0055] Preferably, the arrangement direction of the plurality of first elastic bodies 221 is perpendicular to the arrangement direction of the plurality of second elastic bodies 222. In this way, the impact force received by the second film layer 23 can be more evenly dispersed to the first elastic body 221 and the second elastic body 222.

[0056] It should be noted that both the first elastic body 221 and the second elastic body 222 can be set as plate-like objects with a certain thickness. Along the thickness direction Z of the display panel 10, both side surfaces of the first elastic body 221 are flat and perpendicular to the thickness direction Z of the display panel 10, and the plurality of first elastic bodies 221 are arranged at intervals along the thickness direction of the first elastic body 221; along the thickness direction Z of the display panel 10, both side surfaces of the second elastic body 222 are flat and perpendicular to the thickness direction Z of the display panel 10, and the plurality of second elastic bodies 222 are arranged at intervals along the thickness direction of the second elastic body 222.

[0057] In some embodiments, referring to Figure 5 , the included angle between the arrangement direction of the plurality of first elastic bodies 221 and the arrangement direction of the plurality of second elastic bodies 222 is an obtuse angle. In this way, the impact force received by the second film layer 23 can also be more evenly dispersed to the first elastic body 221 and the second elastic body 222.

[0058] In the embodiments of the present application, the shapes and sizes of the plurality of first elastic bodies 221 are the same, and the shapes and sizes of the plurality of second elastic bodies 222 are the same. The shapes and sizes of the first elastic body 221 and the second elastic body 222 may be the same or different, and the embodiments of the present application do not make specific limitations.

[0059] Among them, the first elastic body 221 can be a linear plate, that is, along the arrangement direction of the plurality of first elastic bodies 221, both side surfaces of the first elastic body 221 are flat surfaces. The first elastic body 221 can also be a corrugated plate, that is, along the arrangement direction of the plurality of first elastic bodies 221, both side surfaces of the first elastic body 221 are corrugated surfaces.

[0060] The second elastic body 222 can be a linear plate, that is, along the arrangement direction of the plurality of second elastic bodies 222, both side surfaces of the second elastic body 222 are flat surfaces. The second elastic body 222 can also be a corrugated plate, that is, along the arrangement direction of the plurality of second elastic bodies 222, both side surfaces of the second elastic body 222 are corrugated surfaces.

[0061] It should be noted that taking the first elastic body 221 as a linear plate as an example to illustrate the linear plate, at this time, both side surfaces of the first elastic body 221 along the thickness direction Z of the display panel 10 are flat surfaces, and along the arrangement direction of the plurality of first elastic bodies 221, both side surfaces of the first elastic body 221 are flat surfaces, that is, the first elastic body 221 can be regarded as a long strip plate with a rectangular cross-section. Taking the first elastic body 221 as a corrugated plate as an example to illustrate the corrugated plate, at this time, both side surfaces of the first elastic body 221 along the thickness direction Z of the display panel 10 are flat surfaces, and along the arrangement direction of the plurality of first elastic bodies 221, both side surfaces of the first elastic body 221 are corrugated surfaces, that is, the orthographic projection of the first elastic body 221 on the first film layer 21 is corrugated; specifically, the wave crests and wave troughs of the corrugated orthographic projection of the first elastic body 221 on the first film layer 21 are the same.

[0062] Specifically, referring to Figure 4 and Figure 5 , the structures of the first elastic body 221 and the second elastic body 222 can be set as follows: along the arrangement direction of the plurality of first elastic bodies 221, both side surfaces of the first elastic body 221 are flat surfaces. Along the arrangement direction of the plurality of second elastic bodies 222, both side surfaces of the second elastic body 222 are flat surfaces.

[0063] Referring to Figure 6 , the structures of the first elastic body 221 and the second elastic body 222 can be set as follows: along the arrangement direction of the plurality of first elastic bodies 221, both side surfaces of the first elastic body 221 are flat surfaces. Along the arrangement direction of the plurality of second elastic bodies 222, both side surfaces of the second elastic body 222 are corrugated surfaces.

[0064] Referring to Figure 7, the structures of the first elastic body 221 and the second elastic body 222 can be set as follows: along the arrangement direction of the plurality of first elastic bodies 221, both side surfaces of the first elastic body 221 are wavy surfaces. Along the arrangement direction of the plurality of second elastic bodies 222, both side surfaces of the second elastic body 222 are flat surfaces.

[0065] The structures of the first elastic body 221 and the second elastic body 222 can be set as follows: along the arrangement direction of the plurality of first elastic bodies 221, both side surfaces of the first elastic body 221 are wavy surfaces. Along the arrangement direction of the plurality of second elastic bodies 222, both side surfaces of the second elastic body 222 are wavy surfaces.

[0066] With the structures of the first elastic body 221 and the second elastic body 222 set as above, when the second film layer 23 is subjected to an impact force, the first elastic body 221 will undergo elastic deformation to resist the impact force received by the second film layer 23. And while the first elastic body 221 resists the impact force, the second elastic body 222 will absorb the impact force, thereby better preventing the impact force from hitting the display panel 10 and causing the display panel 10 to be damaged, and playing a good protective role for the display panel 10.

[0067] In some embodiments, the plurality of first elastic bodies 221 are arranged at equal intervals; the plurality of second elastic bodies 222 are arranged at equal intervals.

[0068] It should be noted that the plurality of first elastic bodies 221 being arranged at equal intervals means that the plurality of first elastic bodies 221 are parallel to each other and the distance between any two adjacent first elastic bodies 221 is equal; the plurality of second elastic bodies 222 being arranged at equal intervals means that the plurality of second elastic bodies 222 are parallel to each other and the distance between any two adjacent second elastic bodies 222 is equal. In this way, when an impact force is applied to the second film layer 23, the impact force will be evenly dispersed to the plurality of first elastic bodies 221. The plurality of first elastic bodies 221 undergo elastic deformation and then evenly disperse the impact force to the plurality of second elastic bodies 222, so that the plurality of second elastic bodies 222 can better absorb the energy of the impact force. Thus, the impact force received by the second film layer 23 will be buffered by the first elastic body 221 and the second elastic body 222, effectively avoiding the impact force received by the second film layer 23 from hitting the first film layer 21 and causing the first film layer 21 to rupture, or hitting the display panel 10 and causing the display panel 10 to be broken, playing a good protective role for the display panel 10, and being able to greatly extend the service life of the display screen and improve the user's satisfaction.

[0069] Furthermore, the distance between any two adjacent first elastic bodies 221 and the distance between any two adjacent second elastic bodies 222 can be equal or not equal, and the embodiments of the present application do not make specific limitations.

[0070] In some embodiments, the elastic modulus of the first elastomer 221 is 300 kPa to 800 kPa; the elastic modulus of the second elastomer 222 is 20 kPa to 50 kPa. In this way, the first elastomer 221 has a relatively high elastic modulus, and the first elastomer 221 is higher than the second elastomer 222 in the thickness direction Z of the display panel 10, which can make the first elastomer 221 have a better anti-impact effect; the second elastomer 222 has a relatively low elastic modulus, and the second elastomer 222 is lower than the second elastomer 222 in the thickness direction Z of the display panel 10, which can make the second elastomer 222 have a better effect of absorbing impact energy.

[0071] In the embodiments of the present application, by setting the height of the first elastomer 221 along the thickness direction Z of the display panel 10 to be greater than the height of the second elastomer 222 along the thickness direction Z of the display panel 10, the effect that the first elastomer 221 bears the impact force first and the second elastomer 222 bears the impact force subsequently can be achieved. However, if the height value by which the first elastomer 221 is higher than the second elastomer 222 is too large, that is, the height difference between the first elastomer 221 and the second elastomer 222 is too large, after the first elastomer 221 bears the impact force, due to the too small height of the second elastomer 222, the elastic deformation range of the second elastomer 222 will also be small. Therefore, not much of the impact force transmitted to the second elastomer 222 will be absorbed by the second elastomer 222. It is equivalent that the external impact force applied to the second film layer 23 is mainly resisted by the first elastomer 221, and the impact force energy absorbed by the second elastomer 222 is extremely small. In this way, the buffering ability of the buffer layer 22 to the external impact force will be reduced, thereby reducing the resistance of the display panel cover 20 to the external impact force.

[0072] If the height value by which the first elastomer 221 is higher than the second elastomer 222 is too small, that is, the height difference between the first elastomer 221 and the second elastomer 222 is too small, after the first elastomer 221 bears the impact force, the first elastomer 221 will maintain the same height as the second elastomer 222 during the elastic deformation process, thereby restricting the elastic deformation range of the first elastomer 221 and affecting the anti-impact effect of the first elastomer 221 on the external impact force. Moreover, the external impact force will be borne by both the first elastomer 221 and the second elastomer 222 at the same time. Since the resistance ability of the first elastomer 221 is limited, solely relying on the second elastomer 222 to absorb the impact force energy will greatly reduce the buffering effect of the buffer layer 22 on the impact force, thereby reducing the resistance of the display panel cover 20 to the external impact force.

[0073] Therefore, along the thickness direction Z of the display panel 10, the height of the first elastic body 221 is 4 / 5 to 9 / 10 times the height of the second elastic body 222. In this way, when an external impact force is applied to the second film layer 23, the first elastic body 221 will bear the impact force first and resist it, and then the impact force is transmitted to the second elastic body 222, and the impact force energy is absorbed by the second elastic body 222, so that the impact force received by the second film layer 23 is buffered by the first elastic body 221 and the second elastic body 222, effectively preventing the impact force received by the second film layer 23 from hitting the first film layer 21 and causing the first film layer 21 to break, or hitting the display panel 10 and causing the display panel 10 to break, playing a good protective role for the display panel 10, greatly extending the service life of the display screen, and improving the user's satisfaction.

[0074] In some embodiments, the second film layer 23 includes fiberglass, and the proportion of fiberglass in the second film layer 23 is greater than 10%; the elastic modulus of the second film layer 23 is greater than 10 GPa.

[0075] It should be noted that the second film layer 23 in the embodiments of the present application is made of CPI material, and the second film layer 23 may include polyamide or polyimide. Since the second film layer 23 is far from the display panel 10, when an external impact force impacts the display screen, the impact force will first be applied to the second film layer 23. Therefore, the second film layer 23 needs to have a certain impact resistance. Therefore, when manufacturing the second film layer 23 in the present application, fiberglass is added to the material for manufacturing the second film layer 23, and the proportion of fiberglass in the overall manufacturing material of the second film layer 23 exceeds 10%. In this way, by using the characteristics of high mechanical strength of fiberglass, the overall strength of the second film layer 23 made of the material added with fiberglass can be increased, thereby enhancing the impact resistance of the second film layer 23, and further improving the impact resistance of the entire display panel cover 20, being able to better protect the display panel 10 from breaking, effectively extending the service life of the display screen, and improving the user's experience.

[0076] Among them, fiberglass is an excellent inorganic non-metallic material with a wide variety of types. Its advantages are good insulation, high heat resistance, good corrosion resistance, and high mechanical strength, but its disadvantages are brittleness and poor wear resistance. It is made from six ores, namely pyrophyllite, quartz sand, limestone, dolomite, boron calcium stone, and boron magnesium stone, through processes such as high-temperature melting, wire drawing, winding, and weaving. The diameter of its single filament is several microns to more than twenty microns, which is 1 / 20 - 1 / 5 of a hair. Each bundle of fiber rovings consists of hundreds or even thousands of single filaments. Fiberglass is usually used as a reinforcing material, electrical insulating material, heat insulating and heat preserving material, circuit board, etc. in various fields of the national economy.

[0077] In the embodiments of the present application, since the first elastomer 221 is higher than the second elastomer 222, the thickness of the buffer layer 22 is the height of the first elastomer 221. The buffer layer 22 achieves a good buffering effect mainly depending on the arrangement of the first elastomer 221 and the second elastomer 222, as well as the height difference and elastic modulus difference between the first elastomer 221 and the second elastomer 222. However, the realization of the height difference between the first elastomer 221 and the second elastomer 222 and the realization of the functions of the first elastomer 221 and the second elastomer 222 both depend on the setting of the respective height values of the first elastomer 221 and the second elastomer 222. Therefore, there are certain requirements for the thickness setting of the buffer layer 22.

[0078] If the thickness of the buffer layer 22 is set too large, it will cause the overall thickness of the display panel cover plate 20 to increase, thereby increasing the thickness of the entire display screen, which is not conducive to the development of the thinness of the display screen. If the thickness of the buffer layer 22 is set too small, the heights of the first elastomer 221 and the second elastomer 222 will be too small, which is not conducive to the realization of the height difference between the first elastomer 221 and the second elastomer 222. In this way, after the first elastomer 221 bears the impact force, it can only elastically deform within a limited range, weakening the resistance to the impact force, thereby reducing the impact resistance of the display panel cover plate 20.

[0079] Therefore, in some embodiments, along the thickness direction Z of the display panel 10, the thickness of the buffer layer 22 is 0.03 mm to 0.1 mm. In this way, it can not only resist and absorb the impact force through the buffer layer 22 to improve the impact resistance of the display panel cover plate 20, but also adding the buffer layer 22 between the first film layer 21 and the second film layer 23 will not overly increase the overall thickness of the display panel cover plate 20, and will not have too much impact on the overall thickness of the display screen.

[0080] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A display panel cover, characterized in that: include: A first film layer, covering the surface of the display panel; A buffer layer, disposed on a surface of the first film layer facing away from the display panel, the buffer layer being used to absorb impact stress through elastic deformation; A second film layer, covering a surface of the buffer layer on a side facing away from the first film layer; The buffer layer includes a first elastic body and a second elastic body, and the first elastic body and the second elastic body are both in strip shape; Wherein, a plurality of the first elastic body and a plurality of the second elastic body are provided, and the plurality of the first elastic bodies are arranged at intervals from each other, and the plurality of the second elastic bodies are arranged at intervals from each other; and Along the thickness direction of the display panel, the height of the first elastic body is greater than the height of the second elastic body, and the elastic modulus of the first elastic body is greater than the elastic modulus of the second elastic body.

2. The display panel cover according to claim 1, characterized in that: A plurality of the first elastic bodies and a plurality of the second elastic bodies are crossed with each other; Preferably, an arrangement direction of the plurality of first elastomers is perpendicular to an arrangement direction of the plurality of second elastomers.

3. The display panel cover according to claim 1 or 2, characterized in that: Along the arrangement direction of the plurality of first elastic bodies, both side surfaces of the first elastic bodies are planes; And / or, along the arrangement direction of the plurality of second elastic bodies, both side surfaces of the second elastic body are planes.

4. The display panel cover according to claim 1 or 2, characterized in that: Along the arrangement direction of the plurality of first elastic bodies, both side surfaces of the first elastic body are wave surfaces; And / or, along the arrangement direction of the plurality of second elastic bodies, both side surfaces of the second elastic body are wavy surfaces.

5. The display panel cover according to claim 1 or 2, characterized in that: A plurality of the first elastic bodies are arranged at equal intervals; A plurality of the second elastic bodies are arranged at equal intervals.

6. The display panel cover according to claim 1 or 2, characterized in that: The elastic modulus of the first elastic body is 300 kPa to 800 kPa; the elastic modulus of the second elastic body is 20 kPa to 50 kPa.

7. The display panel cover according to claim 1 or 2, characterized in that: Along the thickness direction of the display panel, the height of the first elastic body is equal to 4 / 5 to 9 / 10 times the height of the second elastic body.

8. The display panel cover according to claim 1 or 2, characterized in that: The second film layer includes glass fibers, and the glass fibers account for more than 10% of the second film layer; The elastic modulus of the second film layer is greater than 10 GPa.

9. The display panel cover according to claim 1 or 2, characterized in that: The buffer layer comprises a polyurethane material, and along the thickness direction of the display panel, the thickness of the buffer layer is 0.03 mm to 0.1 mm.

10. A display screen, characterized in that: include: Display panel; The display panel cover plate as described in any one of claims 1 to 9, wherein the display panel cover plate covers the surface of the display panel.

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