Protective cover plate, display module and display device

Abstract

The invention relates to a protective cover plate, a display module and a display device. The protective cover plate comprises a substrate which comprises an attaching surface and a light emitting surface which are arranged back to back; and the barrier layer is arranged on the attaching surface, and the barrier layer comprises an inorganic material capable of transmitting visible light. According to the invention, the problem of lamination bubbles can be avoided.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a protective cover plate, a display module, and a display device. Background Art

[0002] Liquid Crystal Displays (LCDs) have the advantages of being lightweight, thin, low-power-consuming, easy to drive, and free of harmful rays. OLED (Organic Light Emitting Diode) display panels are one of the hotspots in the current research field of display panels. OLED display panels have the advantages of low energy consumption, low cost, self-luminescence, wide viewing angles, and fast response speeds. Liquid crystal displays and OLED display panels have been widely used in modern information devices such as televisions, laptop computers, mobile phones, and personal digital assistants, and have broad development prospects. In order to improve the reliability of televisions, laptop computers, mobile phones, personal digital assistants, etc. in terms of wear resistance and scratch resistance, a protective cover plate (CG, Coverglass) needs to be attached to one side of the display panel through an optical adhesive layer to protect the display panel.

[0003] However, in the prior art, there are abnormalities in the adhesion of the protective cover plate, such as adhesion bubbles, which reduce the display quality of the display panel. Summary of the Invention

[0004] Based on this, it is necessary to provide a new protective cover plate, a display module, and a display device for the problem that in the prior art, there are abnormalities in the adhesion of the protective cover plate, such as adhesion bubbles, which reduce the display quality of the display panel.

[0005] According to a first aspect of the present application, there is provided a protective cover plate, comprising:

[0006] a substrate including an adhesion surface and a light-emitting surface disposed opposite to each other;

[0007] a barrier layer disposed on the adhesion surface, the barrier layer including an inorganic material that transmits visible light.

[0008] In some embodiments, the material of the barrier layer includes at least one of silicon monoxide, silicon dioxide, and silicon nitride.

[0009] In some embodiments, the barrier layer includes a first sub-layer and a second sub-layer, the materials of the first sub-layer and the second sub-layer are different, and the second sub-layer is located on a side of the first sub-layer away from the adhesion surface.

[0010] In some embodiments, the material of the first sub-layer includes silicon monoxide, and the material of the second sub-layer includes silicon dioxide.

[0011] In some embodiments, the transmittance of ultraviolet light through the substrate is less than 1%.

[0012] In some embodiments, the substrate includes a substrate body and a doped ultraviolet light absorbing material.

[0013] In some embodiments, the ultraviolet light absorbing material includes at least one of salicylates, benzotriazoles, and benzophenone ultraviolet light absorbers;

[0014] The substrate body includes at least one of polycarbonate and polymethyl methacrylate.

[0015] According to the second aspect of the present application, based on the same inventive concept, a display module is provided, including the protection cover plate described in any one of the above.

[0016] In some embodiments, the display module further includes:

[0017] A display panel;

[0018] An optical adhesive layer, and the protection cover plate is attached to one side of the display panel through the optical adhesive layer;

[0019] Wherein, the hardness of the optical adhesive layer is less than 0.9×E5.

[0020] According to the third aspect of the present application, based on the same inventive concept, a display device is provided, including the display module described in any one of the above.

[0021] In the embodiments of the present application, a barrier layer is provided on the bonding surface. The barrier layer includes an inorganic material that can transmit visible light and has various beneficial effects. 1) In the first aspect, the barrier layer includes an inorganic material that can transmit visible light, so that the barrier layer can transmit the display light in the visible light range emitted by the display panel, without affecting the normal display of the display panel. 2) In the second aspect, the barrier layer includes an inorganic material that can transmit visible light, and the inorganic material has good compactness. In the bonding process of the protection cover plate, the barrier layer can well block the small bubbles generated by the acting force on the protection cover plate from entering the optical adhesive layer, and the barrier layer can also block the small bubbles discharged by the protection cover plate during the reliability test from entering the optical adhesive layer, avoiding the generation of bonding bubbles in the optical adhesive layer and improving the display quality of the display panel. Multiple embodiments of the present application have at least the beneficial effects of any one of these two aspects. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments or exemplary embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the fitting process of the protection cover plate in the prior art provided by the embodiments of the present application.

[0024] Figure 2 It is a schematic diagram after the protection cover plate is fitted in the prior art provided by the embodiments of the present application.

[0025] Figure 3 It is a schematic diagram of the first cross-sectional structure of a protection cover plate provided by some embodiments of the present application.

[0026] Figure 4 It is a schematic diagram of the second cross-sectional structure of a protection cover plate provided by some embodiments of the present application.

[0027] Figure 5 It is a schematic diagram of the fitting process of a protection cover plate provided by some embodiments of the present application.

[0028] Figure 6 It is a schematic diagram of the third cross-sectional structure of a protection cover plate provided by some embodiments of the present application.

[0029] Figure 7 It is a schematic diagram of the structure of a display module provided by the embodiments of the present application.

[0030] Figure 8 It is a schematic diagram of the structure of a display device provided by the embodiments of the present application.

[0031] Reference numerals:

[0032] Display device 200; Display module 100; Protection cover plate 10; Substrate 11; Barrier layer 12; Light-emitting surface 1101; Fitting surface 1102; Substrate body 111; Ultraviolet light absorbing material 112; Optical adhesive layer 20; Display panel 30;

[0033] Acting force F1; Small bubble 11a; Fitting bubble 20a; First sub-layer 121; Second sub-layer 122. Detailed implementation manners

[0034] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 of the present application.

[0036] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0037] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "join", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or the like, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0040] In addition, the drawings are not drawn to a scale of 1:1, and the relative sizes of the various elements are only drawn by way of example in the drawings and not necessarily to the true scale.

[0041] Without departing from the spirit or scope of this application, various modifications and changes can be made in this application, which are obvious to those skilled in the art. Therefore, this application is intended to cover the modifications and changes of this application that fall within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in the embodiments of this application can be combined with each other without conflict.

[0042] In the prior art, there is an abnormality of bonding bubbles in the bonding of the protection cover plate, which reduces the display quality of the display panel. Please refer to Figure 1 and Figure 2 . Figure 1 FIG. is a schematic diagram of the bonding process of the protection cover plate in the prior art provided by the embodiment of this application. Figure 2 FIG. is a schematic diagram after the bonding of the protection cover plate in the prior art provided by the embodiment of this application. As Figure 1 shown, when the protection cover plate 10 is bonded to one side of the display panel 30 through the optical adhesive layer 20, a force F1 needs to be applied to the protection cover plate 10 so that the protection cover plate 10 is closely bonded to the display panel 30 through the optical adhesive layer 20. As Figure 2As shown in the figure, in the display module after the protective cover plate 10 is attached, there are attachment bubbles 20a in the optical adhesive layer 20, and the attachment bubbles 20a will reduce the display quality of the display panel. The inventor's research found that the reason for the appearance of the attachment bubbles 20a is that the material of the protective cover plate 10 is plastic. When it is extruded by the acting force F1, some small bubbles 11a are generated inside the protective cover plate 10. The small bubbles 11a will diffuse into the optical adhesive layer 20 to form small attachment bubbles 20a, and multiple small bubbles 11a will also combine to form large attachment bubbles 20a, and the attachment bubbles 20a reduce the display quality of the display panel 30.

[0043] Based on the above problems, the present application provides a new protective cover plate, display module and display device.

[0044] Please refer to Figures 3 to 6 。 Figure 3 FIG. 10 is a schematic cross-sectional structure view of a first kind of protective cover plate provided by some embodiments of the present application. Figure 4 FIG. 11 is a schematic cross-sectional structure view of a second kind of protective cover plate provided by some embodiments of the present application. Figure 5 FIG. 12 is a schematic view of the attachment process of a protective cover plate provided by some embodiments of the present application. Figure 6 FIG. 13 is a schematic cross-sectional structure view of a third kind of protective cover plate provided by some embodiments of the present application.

[0045] In a first aspect, please refer to Figures 3 to 6 , the present application provides a protective cover plate 10, and the protective cover plate 10 includes a substrate 11 and a barrier layer 12. The substrate 11 includes an attachment surface 1102 and a light-emitting surface 1101 arranged opposite to each other; the barrier layer 12 is disposed on the attachment surface 1102, and the barrier layer 12 includes an inorganic material that can transmit visible light.

[0046] Exemplarily, the attachment surface 1102 refers to the surface of the protective cover plate 10 that is attached to the display panel 30 or the optical adhesive layer 20, and the light-emitting surface 1101 is the surface opposite to the attachment surface 1102. The light-emitting surface 1101 is also the surface where the display light emitted by the display panel 30 exits to the human eye.

[0047] Exemplarily, 1) During the fitting process of the protection cover plate 10, the barrier layer 12 is used to block small bubbles generated by the acting force F1 on the protection cover plate 10 from entering the optical adhesive layer 20, avoiding the generation of fitting bubbles in the optical adhesive layer 20 and improving the display quality of the display panel. 2) When the display module after fitting the protection cover plate 10 undergoes a reliability test, for example, when the reliability test is carried out in a high-temperature and high-humidity environment, some small bubbles will be generated or some small bubbles will be discharged after the substrate 11 is heated. The barrier layer 12 is used to block the small bubbles discharged by the protection cover plate 10 during the reliability test from entering the optical adhesive layer 20, avoiding the generation of bubble defects in the optical adhesive layer 20 and improving the display quality of the display panel. That is, the barrier layer 12 can block small bubbles in the substrate 11 caused by various factors from entering the optical adhesive layer 20, avoiding the generation of bubble defects in the optical adhesive layer 20 and improving the display quality of the display panel.

[0048] Exemplarily, the substrate 11 is a material that transmits visible light / a substrate that transmits visible light, and the transmittance of visible light of the substrate 11 is greater than 90%. The material of the substrate 11 can be an organic substance. For example, the material of the substrate 11 can be PC (polycarbonate) or PMMA (polymethyl methacrylate).

[0049] Exemplarily, the barrier layer 12 includes an inorganic material that can transmit visible light, so that the barrier layer 12 can transmit the display light in the visible light range emitted by the display panel 30, without affecting the normal display of the display panel 30. For example, the transmittance of visible light of the barrier layer 12 is greater than 50%.

[0050] Exemplarily, as Figure 5 shown, the barrier layer 12 includes an inorganic material that can transmit visible light. The inorganic material has good compactness and can well block the small bubbles 11a generated by the acting force F1 on the protection cover plate 10 from entering the optical adhesive layer 20, avoiding the generation of fitting bubbles in the optical adhesive layer 20 and improving the display quality of the display panel.

[0051] Exemplarily, the barrier layer 12 includes an inorganic material that can transmit visible light. The barrier layer 12 can be formed by chemical vapor deposition process, which is not limited herein.

[0052] In the embodiments of the present application, the barrier layer 12 is disposed on the bonding surface 1102. The barrier layer 12 includes an inorganic material that can transmit visible light and has various beneficial effects. 1) In the first aspect, the barrier layer 12 includes an inorganic material that can transmit visible light, so that the barrier layer 12 can transmit the display light in the visible light range emitted by the display panel 30, without affecting the normal display of the image on the display panel 30. 2) In the second aspect, the barrier layer 12 includes an inorganic material that can transmit visible light. The inorganic material has good compactness. In the bonding process of the protective cover plate, the barrier layer 12 can well prevent the small bubbles 11a generated by the acting force F1 on the protective cover plate 10 from entering the optical adhesive layer 20. The barrier layer 12 can also prevent the small bubbles discharged by the protective cover plate 10 during the reliability test from entering the optical adhesive layer 20, avoiding the generation of bonding bubbles in the optical adhesive layer 20 and improving the display quality of the display panel. The embodiments of the present application have the beneficial effects of at least one of these two aspects.

[0053] In some embodiments, the material of the barrier layer 12 includes at least one of silicon monoxide, silicon dioxide, and silicon nitride.

[0054] Exemplarily, silicon monoxide, silicon dioxide, and silicon nitride have good compactness, and can well prevent the small bubbles 11a generated by the acting force F1 on the protective cover plate 10 from entering the optical adhesive layer 20, avoiding the generation of bonding bubbles in the optical adhesive layer 20 and improving the display quality of the display panel.

[0055] In some embodiments, as Figure 4 shown, the barrier layer 12 includes a first sub-layer 121 and a second sub-layer 122. The materials of the first sub-layer 121 and the second sub-layer 122 are different, and the second sub-layer 122 is located on the side of the first sub-layer 121 away from the bonding surface 1102.

[0056] Exemplarily, as Figure 4 shown, the barrier layer 12 may include multiple film layers. For example, in the direction perpendicular to the plane where the protective cover plate 10 is located, the barrier layer 12 includes multiple stacked sub-layers.

[0057] Exemplarily, in the direction perpendicular to the plane where the protective cover plate 10 is located, the thickness of the second sub-layer 122 is greater than the thickness of the first sub-layer 121.

[0058] Exemplarily, as Figure 4As shown, the barrier layer 12 includes a first sub-layer 121 and a second sub-layer 122. The materials of the first sub-layer 121 and the second sub-layer 122 are different. The first sub-layer 121 can enhance the bonding force between the barrier layer 12 and the substrate 11. For example, the first sub-layer 121 can change the hydrophilic or hydrophobic properties of the bonding surface 1102, so that the second sub-layer 122 can be tightly and densely bonded to the substrate 11, thereby better preventing the small bubbles 11a generated by the acting force F1 on the protection cover plate 10 from entering the optical adhesive layer 20, avoiding the generation of bonding bubbles in the optical adhesive layer 20, and improving the display quality of the display panel.

[0059] In some embodiments, as Figure 4 shown, the material of the first sub-layer 121 includes silicon monoxide, and the material of the second sub-layer 122 includes silicon dioxide.

[0060] Exemplarily, as Figure 4 shown, a first sub-layer 121 made of silicon monoxide with a relatively thin thickness can be set, and a second sub-layer 122 made of silicon dioxide with a relatively thick thickness can be set. Silicon monoxide can enhance the bonding force between silicon dioxide and the substrate 11, and can change the hydrophilic or hydrophobic properties of the bonding surface 1102, so that silicon dioxide can be tightly and densely bonded to the substrate 11, thereby better preventing the small bubbles 11a generated by the acting force F1 on the protection cover plate 10 from entering the optical adhesive layer 20, avoiding the generation of bonding bubbles in the optical adhesive layer 20, and improving the display quality of the display panel.

[0061] In some embodiments, as Figure 6 shown, the transmittance of ultraviolet light of the substrate 11 is less than 1%.

[0062] Exemplarily, the display light emitted by the display panel 30 includes low-band blue light and / or part of ultraviolet light. The low-band blue light and / or part of ultraviolet light are more harmful to the human eye. It is necessary to remove the low-band blue light and / or part of ultraviolet light. The transmittance of ultraviolet light of the substrate 11 can be made less than 1%, that is, the substrate 11 has the function of removing low-band blue light or ultraviolet light, which can reduce the harm to the human eye and make the display module 100 more healthy and eye-protecting.

[0063] In some embodiments, as Figure 6 shown, the substrate 11 includes a substrate body 111 and a doped ultraviolet light absorbing material 112.

[0064] Exemplarily, the substrate 11 includes a substrate body 111 and a doped ultraviolet light absorbing material 112. The ultraviolet light absorbing material 112 can be doped in the substrate body 111, so that the transmittance of ultraviolet light through the protective cover plate 10 is less than 1%, that is, the protective cover plate 10 has the function of removing low-band blue light (short-wavelength blue light) or ultraviolet light, which can reduce the harm to the human eye and make the display module 100 healthier and more eye-friendly.

[0065] In some embodiments, as Figure 6 shown, the ultraviolet light absorbing material 112 includes at least one of salicylates, benzotriazoles, and benzophenone ultraviolet light absorbers; the substrate body 111 includes at least one of polycarbonate and polymethyl methacrylate.

[0066] It should be noted that the ultraviolet light absorbing material 112 is not limited to salicylates, benzotriazoles, and benzophenone ultraviolet light absorbers, and can also be an ultraviolet light absorber in any prior art, which is not limited here.

[0067] It should be noted that the material of the substrate body 111 is not limited to polycarbonate and polymethyl methacrylate, and can also be a material suitable for the substrate body 111 and capable of doping the ultraviolet light absorbing material 112 in any prior art, which is not limited here.

[0068] Please refer to Figure 7 . Figure 7 It is a schematic structural diagram of a display module provided by an embodiment of the present application.

[0069] In a second aspect, please refer to Figure 7 , based on the same inventive concept, the present application further provides a display module 100, which includes the protective cover plate 10 in any one of the above, or the display module 100 includes the protective cover plate 10 combined with several of the above features.

[0070] In some embodiments, the display module 100 further includes a display panel 30 and an optical adhesive layer 20. The protective cover plate 10 is attached to one side of the display panel 30 through the optical adhesive layer 20; wherein, the hardness of the optical adhesive layer 20 is less than 0.9×E5.

[0071] Exemplarily, the display panel 30 can be a touch screen. For example, the display panel 30 is an in-cell touch (In cell TP) display screen.

[0072] Exemplarily, the optical adhesive layer 20 can be an OCA (Optically Clear Adhesive, solid adhesive).

[0073] Exemplarily, as Figure 5As shown, the inventors also found through research that during the fitting process of the protective cover plate 10, the protective cover plate 10 is subjected to a force F1, and both the protective cover plate 10 and the optical adhesive layer 20 will deform. The hardness of the optical adhesive layer 20 affects the magnitude of the force F1 that the optical adhesive layer 20 can absorb and buffer. For example, the greater the hardness of the optical adhesive layer 20, the smaller the force F1 that the optical adhesive layer 20 can absorb and buffer, and more of the force F1 received by the protective cover plate 10 will be transmitted to the display panel 30, resulting in an increased amount of deformation of the display panel 30. Excessive deformation of the display panel 30 will damage the structure in the display panel 30, such as causing the circuit traces to break or the support posts to be damaged, thereby causing display defects such as color unevenness (Mura) in the display panel. For example, the smaller the hardness of the optical adhesive layer 20, the greater the force F1 that the optical adhesive layer 20 can absorb and buffer, and a smaller force F1 received by the protective cover plate 10 will be transmitted to the display panel 30, resulting in a reduced amount of deformation of the display panel 30. If the display panel 30 undergoes a small amount of deformation or no deformation, the structure in the display panel 30 will not be damaged, such as the circuit traces will not break and the support posts will not be damaged, thereby avoiding display defects such as color unevenness (Mura) in the display panel and improving the display quality of the display panel 30.

[0074] Exemplarily, as Figure 5 As shown, the inventors also found through research that when the hardness of the optical adhesive layer 20 is less than 0.9×E5, the smaller or more moderate the hardness of the optical adhesive layer 20 is, the greater the force F1 that the optical adhesive layer 20 can absorb and buffer. A smaller force F1 received by the protective cover plate 10 will be transmitted to the display panel 30, resulting in a reduced amount of deformation of the display panel 30. If the display panel 30 undergoes a small amount of deformation or no deformation, the structure in the display panel 30 will not be damaged, such as the circuit traces will not break and the support posts will not be damaged, thereby avoiding display defects such as color unevenness (Mura) in the display panel and improving the display quality of the display panel 30.

[0075] Exemplarily, as Figure 5 As shown, the hardness of the optical adhesive layer 20 being less than 0.9×E5 means that the hardness of the optical adhesive layer 20 is less than 0.9×E5 during the fitting process of the protective cover plate 10. For example, during the fitting process of the protective cover plate 10, the optical adhesive layer 20 is not yet cured, and the hardness of the optical adhesive layer 20 being less than 0.9×E5 can be understood as the hardness of the optical adhesive layer 20 when purchased or the hardness before the fitting process of the protective cover plate 10.

[0076] Exemplarily, as Figure 5 As shown, when the hardness of the optical adhesive layer 20 is less than 0.9×E5, the hardness of the optical adhesive layer 20 can be any value among 0.9×E5, 0.8×E5, 0.7×E5, 0.6×E5, and 0.5×E5.

[0077] Exemplarily, when the display panel 30 is a liquid crystal display panel (LCD), the display panel 30 may include a color filter substrate and an array substrate, and a liquid crystal layer sandwiched between the color filter substrate and the array substrate. The color filter substrate and the array substrate are disposed opposite to each other. The protective cover plate 10 may be attached to one side of the color filter substrate away from the array substrate through an optical adhesive layer 20, but is not limited thereto.

[0078] Exemplarily, when the display panel 30 is an organic light emitting display panel (OLED), the display panel 30 may include an array substrate, a light emitting layer disposed on the array substrate, and a packaging layer disposed on the light emitting layer. The protective cover plate 10 may be attached to one side of the packaging layer away from the array substrate through an optical adhesive layer 20, but is not limited thereto.

[0079] Please refer to Figure 8 。 Figure 8 It is a schematic structural diagram of a display device provided by an embodiment of the present application.

[0080] In a third aspect, please refer to Figure 8 , based on the same inventive concept, the present application further provides a display device 200. The display device 200 includes the display module 100 of any one of the above, or the display device 200 includes the display module 100 combined with several of the above features.

[0081] Exemplarily, in some embodiments, the display device 200 includes the protective cover plate 10 of any one of the above, or the display device 200 includes the protective cover plate 10 combined with several of the above features.

[0082] Exemplarily, as Figure 8 shown, taking the display device 200 as a mobile phone as an example, the display device 200 may also be any device with a display function such as a television, a notebook computer, a personal digital assistant, etc.

[0083] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0084] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A protective cover, characterized in that: include: A substrate, comprising a bonding surface and a light emitting surface disposed opposite to each other; The barrier layer is disposed on the bonding surface, and the barrier layer comprises an inorganic material that can transmit visible light.

2. The protective cover according to claim 1, characterized in that: The material of the barrier layer includes at least one of silicon monoxide, silicon dioxide and silicon nitride.

3. The protective cover according to claim 1, characterized in that: The barrier layer includes a first sublayer and a second sublayer. The first sublayer and the second sublayer are made of different materials. The second sublayer is located on a side of the first sublayer away from the bonding surface.

4. The protective cover according to claim 3, characterized in that: The material of the first sub-layer includes silicon monoxide, and the material of the second sub-layer includes silicon dioxide.

5. The protective cover according to claim 1, characterized in that: The ultraviolet light transmittance of the substrate is less than 1%.

6. The protective cover according to claim 1, characterized in that: The substrate comprises a substrate body and a doped ultraviolet light absorbing material.

7. The protective cover according to claim 6, characterized in that: The ultraviolet light absorbing material includes at least one of salicylate, benzotriazole, and benzophenone ultraviolet light absorbers; The substrate body includes at least one of polycarbonate and polymethyl methacrylate.

8. A display module, characterized in that: Comprising the protective cover plate according to any one of claims 1 to 7.

9. The display module according to claim 8, characterized in that: Also includes: Display panel; An optical adhesive layer, through which the protective cover is attached to one side of the display panel; Wherein, the hardness of the optical adhesive layer is less than 0.9×E5.

10. A display device, characterized in that: Comprising the display module as described in any one of claims 8 and 9.

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