Composite cover plate, display module and electronic device

Abstract

The present application provides a composite cover plate, a display module and an electronic device. The composite cover plate comprises a first substrate and a second substrate; the first substrate has a first surface and a second surface opposite to each other, and the first surface of the first substrate has a plurality of first protrusions; the first protrusion has a first inclined surface; the second substrate is arranged on the side where the first surface is located, and has a plurality of second protrusions; wherein the second protrusion overlaps the first inclined surface of at least one of the first protrusions; and at least part of the second protrusions is spaced apart from the first surface of the first substrate. The composite cover plate has good impact resistance.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a composite cover plate, a display module and an electronic device. Background Art

[0002] With the development of display technology, the application of display modules is becoming more and more extensive. However, the existing flexible display modules use a flexible PI substrate on the back and a TFE encapsulation structure on the front. The CVD film layers of the TFE encapsulation are all brittle materials, and the organic layer in the middle is only 10-12μm. Therefore, when the flexible OLED display module is subjected to a frontal impact force, such as the falling ball and pen test of the reliability test, the vertical impact force will directly act on the TFE encapsulation structure, and the back is made of flexible material, and the supporting force is insufficient, resulting in cracks in the CVD film layer of the encapsulation structure, and external water vapor, oxygen, etc. invade the display screen through the cracks, which in turn causes the display screen to fail and cannot display normally. Therefore, the cover plate of the existing flexible OLED display module has poor impact resistance, and the flexible OLED display module is prone to problems such as damage to the upper surface stress encapsulation layer, resulting in display failure. Summary of the invention

[0003] The composite cover plate, display module and electronic device provided in the present application are intended to solve the problem that the cover plate of the existing flexible OLED display module has poor impact resistance and the flexible OLED display module is prone to damage to the upper surface stress packaging layer, resulting in display failure.

[0004] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a composite cover plate. The composite cover plate includes a first substrate and a second substrate; the first substrate has a first surface and a second surface opposite to each other, and the first surface of the first substrate has a plurality of first protrusions; the first protrusions have a first inclined surface; the second substrate is arranged on the side where the first surface is located, and has a plurality of second protrusions; wherein the second protrusions overlap on the first inclined surface of at least one of the first protrusions, and at least part of the second protrusions are arranged at a distance from the first surface of the first substrate.

[0005] Wherein, the second protrusion overlaps the first inclined surface of one of the first protrusions and is spaced apart from other adjacent first protrusions;

[0006] Preferably, at least one of the second protrusions overlaps two adjacent first protrusions;

[0007] Preferably, the cross section of the first inclined surface along the stacking direction of the composite cover plate is linear or curved;

[0008] Preferably, the cross section of the first protrusion along the stacking direction of the composite cover plate is an axisymmetric figure;

[0009] Preferably, the orthographic projection of the first protrusion on the first substrate and the orthographic projection of the second protrusion on the first substrate are alternately distributed along a preset direction and are connected to each other;

[0010] Preferably, the orthographic projection of the first protrusion on the first substrate and the orthographic projection of the second protrusion on the first substrate are alternately distributed along a preset direction and at least partially overlap.

[0011] Among them, it also includes:

[0012] At least one buffer layer is disposed between the first substrate and the second substrate; the buffer layer has a plurality of third protrusions and a plurality of fourth protrusions; the third protrusions protrude toward the second substrate and have a second inclined surface; the second protrusion overlaps the second inclined surface of at least one of the third protrusions;

[0013] The fourth protrusion protrudes toward the first substrate, and the fourth protrusion overlaps the first inclined surface of at least one of the first protrusions;

[0014] Preferably, part of the buffer layer is recessed toward a first direction to form the third protrusion, and the remaining part of the buffer layer is recessed toward a second direction opposite to the first direction to form the fourth protrusion.

[0015] There are multiple buffer layers, and the fourth protrusion of one of the two adjacent buffer layers overlaps the second inclined surface of at least one third protrusion of the other buffer layer;

[0016] Preferably, the buffer layer is made of elastic material.

[0017] Wherein, the first protrusion and the third protrusion have opposite first and second side edges in cross-section along the stacking direction of the composite cover plate, respectively;

[0018] Wherein, the second protrusion overlaps the second side of the third protrusion and is spaced apart from other adjacent third protrusions; the fourth protrusion overlaps the first side of the adjacent first protrusion and is spaced apart from other adjacent first protrusions.

[0019] Wherein, the gap between the second protrusion and other adjacent third protrusions, and / or the gap between the fourth protrusion and other adjacent first protrusions are filled with elastic material.

[0020] Among them, it also includes: the material of the second substrate includes one or more of silicon dioxide, polymethyl methacrylate, and polycarbonate.

[0021] In order to solve the above technical problems, another technical solution adopted by the present application is to provide a display module. The display module includes: a display screen and a cover plate; wherein the display screen has a display surface and a back surface opposite to each other; the cover plate is arranged on the side where the display surface of the display screen is located; and the cover plate is the composite cover plate mentioned above; the second substrate of the composite cover plate is located on the side of the first substrate away from the display screen.

[0022] It also includes a buffer plate, which is arranged on the side where the back of the display screen is located, and is used to buffer the impact force on the back of the display module; wherein the buffer plate is the composite cover plate as described in any one of claims 1-7.

[0023] In order to solve the above technical problem, another technical solution adopted by the present application is to provide an electronic device, which includes the above-mentioned display module.

[0024] The beneficial effects of the embodiments of the present application are different from those of the prior art: the composite cover plate, display module and electronic device provided by the embodiments of the present application, the composite cover plate is provided with a first substrate so that the first surface of the first substrate has a plurality of first protrusions; the first protrusion has a first inclined surface; at the same time, a second substrate is provided on the side where the first surface of the first substrate is located, so that the second substrate has a plurality of second protrusions, and the second protrusions are overlapped on the first inclined surface of at least one first protrusion, and the second protrusions are spaced apart from the first surface of the first substrate; in this way, when the second substrate is subjected to force, since the second protrusions of the second substrate are overlapped on the first inclined surface, the first inclined surface can be used to decompose the vertical downward force exerted on the second substrate, so as to reduce the vertical downward force exerted on the first substrate; at the same time, a plurality of air bags are defined and formed between the first substrate and the second substrate by the first protrusions and the second protrusions. When the second substrate is subjected to force, the rebound of the air bags can also offset part of the downward force, which can play a certain buffering effect and greatly improve the impact resistance of the composite cover plate. In addition, when the composite cover plate is applied to a display module, for example, when the composite cover plate is covered on the side of the packaging layer of the display module facing away from the display screen, the stress on the packaging layer can be reduced, effectively reducing the possibility that the packaging layer will be subjected to excessive stress and cracks will appear, and external water vapor, oxygen, etc. will intrude into the display screen through the cracks, causing the display screen to fail and the probability of abnormal display problems occurring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a composite cover plate provided in one embodiment of the present application;

[0026] Figures 2 to 6 is a cross-sectional view of the first protrusion along the stacking direction of the composite cover plate;

[0027] Figure 7 is a schematic diagram of force analysis between the first substrate and the second substrate;

[0028] Figure 8 A top view showing the second protrusion overlapping the first protrusion;

[0029] Fig. 9 A schematic diagram of the positions of a second protrusion and two adjacent first protrusions provided in an embodiment;

[0030] Fig.10 A schematic diagram of the structure of a composite cover plate provided in another embodiment of the present application;

[0031] Fig.11 A schematic diagram of force analysis between the first substrate, the buffer layer and the second substrate;

[0032] Fig.12 A schematic diagram of the structure of a display module provided in one embodiment of the present application;

[0033] Fig.13 A schematic diagram of the structure of a display module provided in another embodiment of the present application;

[0034] Fig.14 A simplified structural diagram of an electronic device provided in one embodiment of the present application.

[0035] Description of Reference Numerals

[0036] 1-composite cover plate; 11-first substrate; 111-first protrusion; 112-first inclined surface; 113-airbag; 12-second substrate; 121-second protrusion; 13; buffer layer; 131-third protrusion; 1311-second inclined surface; 132-fourth protrusion; M-first side; N-second side; 100-display module; 10-carrying plate 10; 20-display screen; 30-packaging layer; 40-cover plate; 50-buffer plate, 60-polarizer; 70-adhesive layer. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0041] See also Figure 1 , is a schematic diagram of the structure of a composite cover plate provided in an embodiment of the present application; in this embodiment, a composite cover plate 1 is provided, which can be covered on a display screen to protect the display screen and prevent the intrusion of external water vapor, oxygen, etc. Specifically, Figure 1 As shown, the composite cover plate 1 includes a first substrate 11 and a second substrate 12 .

[0042] The first substrate 11 has a first surface and a second surface opposite to each other, and the first surface of the first substrate 11 has a plurality of first protrusions 111; each first protrusion 111 has a first inclined surface 112. The cross section of the first inclined surface 112 along the stacking direction Y of the composite cover plate 1 is linear (as shown below): Figure 2-6 ) or curvilinear (e.g. Figure 1 ). The second surface of the first substrate 11 is a flat surface, so that the composite cover plate 1 can be attached to other structural parts.

[0043] The first protrusions 111 may be arranged in an array or randomly. The first substrate 11 may be made of a hardened material, such as one or more of silicon dioxide, polymethacrylate, and polycarbonate, to improve impact resistance. Of course, the first substrate 11 may also be made of an elastic material to improve buffering capacity when subjected to force.

[0044] In some embodiments, Figure 1 As shown, the cross section of the first protrusion 111 along the stacking direction Y of the composite cover plate 1 can be semi-elliptical or semi-circular. Of course, in some other embodiments, see Figures 2 to 6 , is a cross-sectional view of the first protrusion 111 along the stacking direction Y of the composite cover plate 1; Figure 2 and Figure 3 As shown, the cross section of the first protrusion 111 along the stacking direction Y of the composite cover plate 1 may also be a trapezoid, such as an isosceles trapezoid or a right-angle trapezoid. Figure 4 As shown, the cross section of the first protrusion 111 along the stacking direction Y of the composite cover plate 1 may also be a triangle, such as a right triangle, an isosceles triangle or other triangles. Figure 5 and Figure 6 As shown, the cross section of the first protrusion 111 along the stacking direction Y of the composite cover plate 1 may also be other irregular shapes, which is not limited in the present application, as long as it has the first inclined surface 112. Of course, those skilled in the art can understand that the cross section of the first protrusions 111 along the stacking direction Y of the composite cover plate 1 may be any combination of the above-mentioned various shapes.

[0045] Specifically, the cross section of the first protrusion 111 along the stacking direction Y of the composite cover plate 1 may be an axisymmetric figure.

[0046] The second substrate 12 is arranged on the side where the first surface of the first substrate 11 is located, and has a plurality of second protrusions 121. Among them, the second protrusion 121 overlaps the first inclined surface 112 of at least one first protrusion 111, and the second protrusion 121 is spaced apart from the first surface of the first substrate 11, that is, a gap is provided between the second protrusion 121 and the first surface of the first substrate 11, and the second protrusion 121 does not overlap with the first surface of the first substrate 11. Specifically, the second protrusion 121 only overlaps with the first protrusion 111, and does not overlap with other positions of the first substrate 11 except the first protrusion 111, so as to form an airbag 113 between the first protrusion 111, the second protrusion 121, the first substrate 11 and the second substrate 12. In this way, the combination Figure 7 , Figure 7It is a schematic diagram of force analysis between the first substrate and the second substrate; when the second substrate 12 is subjected to force F, since the second protrusion 121 of the second substrate 12 overlaps the first inclined surface 112, the first inclined surface 112 can be used to decompose the vertical downward force F exerted on the second substrate 12 into a first component force F1 perpendicular to the first inclined surface 112 and a second component force F2 tangential to or parallel to the first inclined surface 112. The vertical component of the first force F1 is Fb, and the vertical component of the second force F2 is Fd. At this time, the vertical downward force transmitted to the first protrusion 111 by the second substrate 12, that is, the force F' exerted on the first protrusion 111 = F-Fb-Fd. In other words, when the second substrate 12 is impacted by the force F, only the force F' is transmitted to the first substrate 11, which effectively reduces the vertical downward force exerted on the first substrate 11. At the same time, a plurality of air bags 113 (see FIG. 1 ) are defined between the first substrate 11 and the second substrate 12 by the first protrusion 111 and the second protrusion 121. Figure 1 ), when the second substrate 12 is subjected to force, the rebound of the airbag 113 can also offset part of the downward force, which can play a certain buffering effect on the transmission of force, greatly improving the impact resistance of the composite cover plate 1. In addition, when the composite cover plate 1 is applied to the display module 100, for example, when the composite cover plate 1 is covered on the side of the packaging layer 30 of the display module 100 away from the display screen 20, the force on the packaging layer 30 can be reduced, effectively reducing the probability that the packaging layer 30 will be subjected to excessive force and cracks will appear, and external water vapor, oxygen, etc. will intrude into the display screen 20 through the cracks, causing the display screen 20 to fail and fail to display normally.

[0047] Among them, the cross-section of the stacked square of the second protrusion 121 along the composite cover plate 1 can be any shape, such as semi-elliptical, rectangular, square, triangular, etc., or the second protrusion 121 can be similar to the shape of the first protrusion 111. The present application does not impose any restrictions on this, as long as it can overlap the first inclined surface 112 of the first protrusion 111.

[0048] In some embodiments, in combination Figure 1 The second protrusion 121 overlaps the first inclined surface 112 of one first protrusion 111 and is spaced apart from other adjacent first protrusions 111. Figure 1 As shown, air pockets 113 are formed between the second protrusions 121, the first protrusions 111 arranged at intervals, the adjacent second protrusions 121, the first substrate 11, and the second substrate 12. In this way, when the second substrate 12 is deformed toward the first substrate 11 by force and gradually fills the air pockets 113 between the first substrate 11 and the second substrate 12, the rebound of the air pockets 113 can offset part of the downward force, so as to further reduce the force on the first substrate 11.

[0049] Furthermore, the airbag 113 may also be filled with an elastic material to further absorb or disperse the impact force on the second substrate 12 and reduce the force transmitted to the first substrate 11. The elastic material may be one or more of ethylene-vinyl acetate copolymer (EVA), thermoplastic polyurethane elastomer (TPU), segmented polyether amide elastomer (PEBAX), ethylene-vinyl acetate copolymer (EVA), and the like.

[0050] Of course, in other embodiments, combined with Figure 8 , Figure 8 It is a top view of the second protrusion overlapped on the first protrusion. The second protrusion 121 can also overlap on the first inclined surfaces 112 of multiple first protrusions 111 at the same time; for example, the second protrusion 121 can also overlap on the first inclined surfaces 112 of two, three, four or more first protrusions 111 at the same time. In this way, the force applied to the second protrusion 121 can be decomposed by multiple first protrusions 111, reducing the vertical downward force applied to the first protrusion 111, and improving the situation where other structural parts in contact with the composite cover plate 1 are split due to excessive local force.

[0051] Specifically, as above Figure 1 and Figure 8 As shown, a second protrusion 121 overlaps two adjacent first protrusions 111. That is, the orthographic projections of the first protrusions 111 on the first substrate 11 and the orthographic projections of the second protrusions 121 on the first substrate 11 are alternately distributed along a preset direction, and the second protrusion 121 is connected to at least one adjacent first protrusion 111. Of course, in some other embodiments, the combination Fig. 9 , Fig. 9 The schematic diagram of the positions of the second protrusion and two adjacent first protrusions provided in one embodiment; two or more second protrusions 121 may also overlap between two adjacent first protrusions 111.

[0052] Specifically, the material of the second substrate 12 may be a hardened material, which can offset the deformation of the composite cover plate 1 caused by the impact force to the maximum extent, thereby reducing the force on the first substrate 11. Specifically, the material of the second substrate 12 includes one or more of silicon dioxide, polymethyl methacrylate, and polycarbonate.

[0053] In other embodiments, see Fig.10, which is a schematic diagram of the structure of a composite cover plate provided in another embodiment of the present application. The composite cover plate 1 also includes at least one buffer layer 13, and the at least one buffer layer 13 is arranged between the first substrate 11 and the second substrate 12, and is used to buffer the impact force received by the composite cover plate 1. The material of the buffer layer 13 can be an elastic material with high optical transmittance, for example, the material of the buffer layer 13 includes one or more of polyethylene terephthalate (PET), transparent polyimide (ClearPolyimide, CPI), thermoplastic polyurethane elastomer (TPU) and cycloolefin polymer (COP).

[0054] For the sake of convenience, the following takes the number of the buffer layer 13 as one as an example. Fig.10 As shown, the buffer layer 13 has a plurality of third protrusions 131 and a plurality of fourth protrusions 132. The third protrusions 131 protrude toward the second substrate 12, and the third protrusions 131 have a second inclined surface 1311; the second protrusion 121 is specifically overlapped on the second inclined surface 1311 of at least one third protrusion 131, so as to be indirectly overlapped on the first protrusion 111 through the buffer layer 13. Specifically, the specific structure and shape of the third protrusion 131 are the same or similar to the specific structure and shape of the first protrusion 111, the specific structure of the second inclined surface 1311 is similar to the first inclined surface 112, and the specific overlap method of the second protrusion 121 overlapping the third protrusion 131 is similar to the specific overlap method of the second protrusion 121 overlapping the first protrusion 111, and the details can be seen above.

[0055] The fourth protrusion 132 protrudes toward the first substrate 11, and the fourth protrusion 132 overlaps the first inclined surface 112 of at least one first protrusion 111. It can be understood that in this embodiment, the second protrusion 121 is overlapped on the first protrusion 111 through the third protrusion 131 and the fourth protrusion 132. The shape of the fourth protrusion 132 may be similar to that of the second protrusion 121. Among them, the specific structure and shape of the fourth protrusion 132 are the same or similar to the specific structure and shape of the second protrusion 121, and the specific overlap method of the fourth protrusion 132 overlapping the first protrusion 111 is similar to the specific overlap method of the second protrusion 121 overlapping the first protrusion 111, which can be specifically referred to above.

[0056] By adding the buffer layer 13, the second protrusion 121 overlaps the second inclined surface 1311 of the third protrusion 131; Fig.11, is a schematic diagram of force analysis between the first substrate, the buffer layer and the second substrate; when the second substrate 12 is subjected to force F, the second inclined surface 1311 can be used to decompose the vertical downward force F exerted on the second substrate 12 into a first force component F1 perpendicular to the second inclined surface 1311 and a second force component F2 tangential to or parallel to the first inclined surface 1312. The vertical force component of the first force component F1 is Fb, and the vertical force component of the second force component F2 is Fd; at this time, the second substrate 12 is transmitted to the buffer layer 13, that is, the force exerted on the buffer layer 13 is F'=F-Fb-Fd. Furthermore, by making the fourth protrusion 132 of the buffer layer 13 overlap the first inclined surface 112 of the first protrusion 111, the first inclined surface 112 can be further utilized to decompose the force F' applied by the buffer layer 13 to the first protrusion 111 through the fourth protrusion 132 into a third component force F3 perpendicular to the first inclined surface 112 and a fourth component force F4 tangential to or parallel to the first inclined surface 112. The vertical component of the third force component F3 is Fg, and the vertical component of the fourth force component F4 is Fi; at this time, the buffer layer 13 transmits the vertical downward force to the first protrusion 111, that is, the force F"=F'-Fg-Fi exerted on the first protrusion 111; that is, of the vertical downward force F exerted on the second substrate 12, only force F" is transmitted to the first substrate 11; compared with the solution of transferring force F' to the first substrate 11, the vertical downward force exerted on the first substrate 11 is further reduced, the overall impact resistance of the composite cover panel 1 is improved, and the situation in which other structural parts in contact with the composite cover panel 1 are split due to large force is improved.

[0057] For details, please continue to refer to Fig.11 , the first protrusion 111 and the third protrusion 131 have opposite first side M and second side N in the cross section along the stacking direction Y of the composite cover plate 1; the second protrusion 121 overlaps the second side N of the third protrusion 131 and is spaced apart from other adjacent third protrusions 131; the fourth protrusion 132 overlaps the first side M of the adjacent first protrusion 111 and is spaced apart from other adjacent first protrusions 111. In other words, the overlapping position of the second protrusion 121 on the third protrusion 131 and the overlapping position of the fourth protrusion 132 on the first protrusion 111 are located on different sides. In this way, alternately distributed airbags 113 can be formed in the composite cover plate 1 to evenly disperse the impact force on the second substrate 12.

[0058] Furthermore, the gap between the second protrusion 121 and other adjacent third protrusions 131 , and / or the gap between the fourth protrusion 132 and other adjacent first protrusions 111 , that is, the inside of the airbag 113 is also filled with elastic material.

[0059] It can be understood by those skilled in the art that when the number of buffer layers 13 is two, three, four or more, the fourth protrusion 132 of one of the two adjacent buffer layers 13 overlaps the second inclined surface 1311 of at least one third protrusion 131 of the other buffer layer 13. In this way, the vertical downward force received can be decomposed once by each second inclined surface 1311, so as to effectively reduce the force on the first substrate 11. The specific number of buffer layers 13 can be selected according to actual conditions.

[0060] In a specific embodiment, in combination Fig.10 , part of the buffer layer 13 is recessed toward the first direction to form a third protrusion 131, and the rest of the buffer layer 13 is recessed toward the second direction opposite to the first direction to form a fourth protrusion 132; that is, the buffer layer 13 is composed of the third protrusion 131 and the fourth protrusion 132, and the two are an integrated structure. Among them, the first direction is toward the second substrate 12 and is parallel to the stacking direction Y of the composite cover plate 1. Of course, in other embodiments, the buffer layer 13 may also include a main body layer, the third protrusion 131 is arranged on the first surface of the main body layer, and the fourth protrusion 132 is arranged on the second surface of the main body layer opposite to the first surface.

[0061] The composite cover plate 1 provided in this embodiment is provided with a first substrate 11, so that the first surface of the first substrate 11 has a plurality of first protrusions 111; the first protrusions 111 have a first inclined surface 112; and at the same time, a second substrate 12 is provided on the side where the first surface of the first substrate 11 is located, so that the second substrate 12 has a plurality of second protrusions 121, and the second protrusions 121 overlap on the first inclined surface 112 of at least one first protrusion 111, and the second protrusions 121 are spaced apart from the first surface of the first substrate 11; in this way, when the second substrate 12 is subjected to force, due to the second substrate The second protrusion 121 of the composite cover 12 overlaps the first inclined surface 112, so that the vertical downward force F exerted on the second substrate 12 can be decomposed by the first inclined surface 112 to reduce the vertical downward force exerted on the first substrate 11; at the same time, a number of airbags 113 are defined and formed between the first substrate 11 and the second substrate 12 through the first protrusion 111 and the second protrusion 121. When the second substrate 12 is subjected to force, the rebound of the airbags 113 can also offset part of the downward force, which can play a certain buffering effect and greatly improve the impact resistance of the composite cover 1. In addition, when the composite cover 1 is applied to the display module 100, for example, when the composite cover 1 is covered on the side of the encapsulation layer 30 of the display module 100 away from the display screen 20, the force exerted on the encapsulation layer 30 can be reduced, effectively reducing the probability that the encapsulation layer 30 will be subjected to excessive force and cracks will appear, and external water vapor, oxygen, etc. will intrude into the display screen 20 through the cracks, causing the display screen 20 to fail and fail to display normally.

[0062] See also Fig.12 , is a schematic diagram of the structure of a display module provided in an embodiment of the present application. In this embodiment, a display module 100 is provided, and the display module 100 includes a carrier plate 10, a display screen 20, a packaging layer 30 and a cover plate 40 stacked in sequence.

[0063] Among them, the carrier plate 10 includes a cushioning member (supper clear foam, SCF) and / or a supporting film layer. The specific structure and function of the carrier plate 10 can be the same or similar to the specific structure and function of the carrier plate 10 in the existing display module 100, and the same or similar technical effects can be achieved, which will not be repeated here. The display screen 20 is arranged on the side where the supporting film layer of the carrier plate 10 is located, and the display screen 20 has a display surface and a back surface opposite to each other. The display surface is used to display the picture, and the back surface is attached to the carrier plate 10. The encapsulation layer 30 is stacked on the side where the display surface of the display screen 20 is located. The cover plate 40 is covered on the side of the encapsulation layer 30 away from the display screen 20, and is located at the outermost side of the display module 100, for protecting the display module 100. Among them, the cover plate 40 is a composite cover plate 1 provided by any of the above-mentioned embodiments. The specific structure and function of the composite cover plate 1 can be found in the above-mentioned related description. Specifically, the second substrate 12 of the composite cover plate 1 is located on the side of the first substrate 11 away from the encapsulation layer 30, so as to utilize the second substrate 12 with greater strength to enhance the impact resistance of the front side of the display module 100.

[0064] By arranging the composite cover plate 1 as provided in the above embodiment on the side of the encapsulation layer 30 facing away from the display screen 20, the front side of the display module 100, that is, the composite cover plate 1, can decompose the vertical downward force exerted on the second substrate 12 by the first inclined surface 112 when the second substrate 12 is subjected to force, so as to reduce the vertical downward force exerted on the first substrate 11; at the same time, a plurality of air bags 113 are defined between the first substrate 11 and the second substrate 12 by the first protrusion 111 and the second protrusion 121. When the second substrate 12 is subjected to force, the rebound of the air bags 113 can also offset a part of the downward force, which can play a certain buffering effect, greatly improving the impact resistance of the composite cover plate 1, reducing the force exerted on the encapsulation layer 30, and effectively reducing the probability that the encapsulation layer 30 will be subjected to excessive force and cracks will appear, and external water vapor, oxygen, etc. will intrude into the display screen 20 through the cracks, causing the display screen 20 to fail and fail to display normally. In addition, by making the composite cover plate 1 include at least one buffer layer 13, a layered structure is formed inside the composite cover plate 1, and the various layers of the composite cover plate 1 support each other to offset most of the frontal impact force, so that the force on the display screen 20 is reduced, thereby protecting the encapsulation layer 30 and preventing it from splitting.

[0065] Among them, see Fig.13, which is a schematic diagram of the structure of a display module provided in another embodiment of the present application; the display module 100 also includes a buffer plate 50, which is arranged on the side where the back of the display screen 20 is located, and is located at the outermost side of the display module 100, and is used to buffer the impact force on the back of the display module 100. Among them, the buffer plate 50 is also the composite cover plate 1 provided in any of the above embodiments, and the second substrate 12 of the composite cover plate 1 is located on the side of the first substrate 11 away from the display screen 20, so as to enhance the impact resistance of the back of the display module 100, and prevent external water vapor from entering the display screen 20 from the back of the display module 100, and affecting the display of the display screen 20.

[0066] See also Fig.14 , Fig.14 This is a simplified structural diagram of an electronic device provided in one embodiment of the present application; in this embodiment, an electronic device is also provided, which can be a desktop computer, a laptop computer, a personal digital assistant (PDA), a mobile phone, a television, etc. The electronic device includes a display module 100 for displaying images during operation. The display module 100 is the display module 100 involved in any of the above embodiments, and the specific structure and function of the display module 100 can refer to the relevant description of the display module 100 provided in the above embodiments, which will not be repeated here.

[0067] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A composite cover plate, It is characterized in that include: A first substrate having a first surface and a second surface opposite to each other, and the first surface of the first substrate has a plurality of first protrusions arranged at intervals; the first protrusions have a first inclined surface; A second substrate is disposed on the side where the first surface is located, and has a plurality of second protrusions arranged at intervals; wherein at least part of the second protrusions are arranged at intervals from the first surface of the first substrate; At least one buffer layer is disposed between the first substrate and the second substrate; the buffer layer has a plurality of third protrusions and a plurality of fourth protrusions disposed at intervals; the third protrusions protrude toward the second substrate and have a second inclined surface; the second protrusion overlaps the second inclined surface of at least one of the third protrusions; The fourth protrusion protrudes toward the first substrate, and the fourth protrusion overlaps the first inclined surface of at least one of the first protrusions; The cross-sections of the first protrusion and the third protrusion along the stacking direction of the composite cover plate respectively have opposite first and second sides; wherein the second protrusion overlaps the second side of the third protrusion and is spaced apart from at least one adjacent third protrusion; the fourth protrusion overlaps the first side of the adjacent first protrusion and is spaced apart from at least one adjacent first protrusion.

2. The composite cover plate according to claim 1, It is characterized in that At least one of the second protrusions overlaps two adjacent first protrusions.

3. The composite cover plate according to claim 2, It is characterized in that The cross section of the first inclined surface along the stacking direction of the composite cover plate is linear or curved.

4. The composite cover plate according to claim 2, It is characterized in that The cross section of the first protrusion along the stacking direction of the composite cover plate is an axisymmetric shape.

5. The composite cover plate according to claim 2, It is characterized in that The orthographic projection of the first protrusion on the first substrate and the orthographic projection of the second protrusion on the first substrate are alternately distributed along a preset direction and are connected to each other.

6. The composite cover plate according to claim 2, It is characterized in that The orthographic projection of the first protrusion on the first substrate and the orthographic projection of the second protrusion on the first substrate are alternately distributed along a preset direction and at least partially overlap.

7. The composite cover plate according to claim 1, It is characterized in that A portion of the buffer layer is recessed toward a first direction to form the third protrusion, and a remaining portion of the buffer layer is recessed toward a second direction opposite to the first direction to form the fourth protrusion.

8. The composite cover plate according to claim 1, It is characterized in that There are a plurality of buffer layers, and the fourth protrusion of one of two adjacent buffer layers overlaps the second inclined surface of at least one third protrusion of the other buffer layer.

9. The composite cover plate according to claim 8, It is characterized in that The buffer layer is made of elastic material.

10. The composite cover plate according to claim 1, It is characterized in that The second protrusion is spaced apart from other adjacent third protrusions; and the fourth protrusion is spaced apart from other adjacent first protrusions.

11. The composite cover plate according to claim 10, It is characterized in that The gap between the second protrusion and the other adjacent third protrusions, and / or the gap between the fourth protrusion and the other adjacent first protrusions is filled with elastic material.

12. The composite cover plate according to claim 1, It is characterized in that Also includes: The material of the second substrate includes one or more of silicon dioxide, polymethyl methacrylate, and polycarbonate.

13. A display module, It is characterized in that include: A display screen having a display surface and a back surface facing each other; The cover plate is arranged on the side where the display surface of the display screen is located; and the cover plate is a composite cover plate as described in any one of claims 1 to 12; the second substrate of the composite cover plate is located on the side of the first substrate away from the display screen.

14. The display module according to claim 13, It is characterized in that It also includes a buffer plate, which is arranged on the side where the back of the display screen is located, and is used to buffer the impact force on the back of the display module; wherein the buffer plate is the composite cover plate as described in any one of claims 1-12.

15. An electronic device, It is characterized in that Comprising a display module as described in any one of claims 13-14.

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