Protective cover plate, display module and display device

Abstract

The present disclosure provides a protective cover plate, a display module and a display device. The protective cover plate comprises a cover plate substrate and a light shielding layer. The cover plate substrate has a first area and a second area on at least one side of the first area. The cover plate substrate comprises a first surface and a second surface arranged oppositely. A groove is arranged on the second area of the first surface. The light shielding layer is arranged on the first surface and located in the second area. The sidewall of the groove comprises a light transmission surface and a light reflection surface. The contact area of the light transmission surface with the light shielding layer accounts for 0-10% of the area of the light transmission surface. A predetermined angle is formed between the light transmission surface and the light reflection surface. The protective cover plate, the display module and the display device provided by the present disclosure can improve the curing rate of the optical adhesive layer and improve the reliability of the display product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a protective cover plate, a display module and a display device. BACKGROUND

[0002] With the improvement of process capability and material performance, the heat bending angle of 3D cover plate is getting larger and larger, for example, the current mainstream appearance form is equal-depth four-curved cover plate. However, whether it is a 2D cover plate or a 3D cover plate, the periphery of the cover plate will be coated with a light shielding layer, and the light shielding layer on the cover plate will partially block the optical adhesive layer (OCA), which will cause the blocked part of the optical adhesive layer to have the risk of incomplete curing, and further cause the optical adhesive layer to easily appear bubbles and other defects in the reliability test. SUMMARY

[0003] The present application provides a protective cover plate, a display module and a display device, which can improve the reliability of display products.

[0004] The technical solutions provided by the embodiments of the present application are as follows:

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

[0006] a cover plate substrate having a first area and a second area located on at least one side of the first area, the cover plate substrate comprising a first surface and a second surface arranged opposite to each other, and a groove is provided on the second area of the first surface;

[0007] a light shielding layer provided on the first surface and located in the second area; wherein,

[0008] the side wall of the groove comprises a light transmitting surface and a light reflecting surface, the contact area of the light transmitting surface with the light shielding layer is 0-10% of the area of the light transmitting surface, and a predetermined included angle is formed between the light transmitting surface and the light reflecting surface.

[0009] According to some exemplary embodiments of the present application, the light shielding layer comprises a first light shielding part covering the surface of the light reflecting surface, and a reflecting layer is further provided at the light reflecting surface, covering one side of the first light shielding part away from the light reflecting surface.

[0010] According to some exemplary embodiments of the present application, the light shielding layer comprises a black ink layer, and the reflecting layer comprises a silver ink layer.

[0011] According to some exemplary embodiments of the present application, the groove is arranged around the first area, and in the direction from the second area to the first area, the light transmitting surface is located on the side of the light reflecting surface close to the first area.

[0012] According to some example embodiments of the present disclosure, the light-transmitting surface comprises a first inclined surface inclined relative to the second surface, and the first inclined surface gradually inclines towards the second surface from a side close to the first region to a side away from the first region; or,

[0013] The light-transmitting surface comprises a first arc-shaped curved surface comprising a first end and a second end opposite in a direction from the first region to the second region, the first end being closer to the first region than the second end, and a distance between the first end and the second surface being greater than a distance between the second end and the second surface, wherein a middle portion of the first arc-shaped curved surface is convex to the recess inner cavity.

[0014] According to some example embodiments of the present disclosure, the light-reflecting surface comprises a second inclined surface inclined relative to the second surface, and the second inclined surface gradually inclines away from the second surface from a side close to the first region to a side away from the first region; or,

[0015] The light-reflecting surface comprises a second arc-shaped curved surface comprising a third end and a fourth end opposite in a direction from the first region to the second region, the third end being closer to the first region than the fourth end, and a distance between the third end and the second surface being less than a distance between the fourth end and the second surface, wherein a middle portion of the second arc-shaped curved surface is convex to the recess inner cavity or concave to the cover substrate.

[0016] According to some example embodiments of the present disclosure, the recess is further filled with a light-transmitting filling body, and a step difference between a side surface of the light-transmitting filling body away from the second surface and the first surface is less than or equal to a threshold value.

[0017] According to a second aspect of the present disclosure, a display module is provided, comprising:

[0018] A protective cover plate as described above; and

[0019] A display panel, the protective cover plate being arranged on a light-emitting side of the display panel, and the protective cover plate and the display panel being attached through an optical adhesive layer.

[0020] According to some example embodiments of the present disclosure, the optical adhesive layer comprises at least an occluded region overlapping a normal projection of the light-shielding layer on the second surface, and a normal projection of the light-reflecting surface on the second surface covers at least a normal projection of the occluded region on the second surface.

[0021] According to a third aspect of the present disclosure, a display device is provided, comprising a display module as described above.

[0022] The beneficial effects brought by the embodiments of the present disclosure are as follows:

[0023] In the above scheme, the groove is arranged on the second area of the first surface of the cover substrate, and the groove is configured to include a light-transmitting surface and a light-reflecting surface. The contact area of the light-transmitting surface with the light-shielding layer accounts for 0-10% of the area of the light-transmitting surface, that is, the light-transmitting surface is at least partially uncovered by the light-shielding layer, so that the light incident from the second surface can at least partially transmit through the light-transmitting surface and be deflected by the interface of the light-transmitting surface. The light-transmitting surface and the light-reflecting surface form a predetermined included angle. In this way, the light-reflecting surface can at least partially reflect the light deflected by the light-transmitting surface to a target area, which can be located on the side of the light-shielding layer away from the second surface, and the target area at least partially overlaps with the orthographic projection of the light-shielding layer on the second surface. That is, the light-transmitting surface and the light-reflecting surface of the groove can modulate the light and reflect at least part of the light to the target area blocked by the light-shielding layer.

[0024] In this way, when the protective cover is applied to a display module, the protective cover and the display panel are attached through an optical adhesive layer, and part of the optical adhesive layer is blocked by the light-shielding layer. The target area can include the area where the optical adhesive layer is blocked by the light-shielding layer. By arranging the groove on the protective cover, the light-transmitting surface and the light-reflecting surface of the groove can modulate the light incident from the second surface into the cover substrate and reflect it to the target area. Therefore, the area of the optical adhesive layer blocked by the light-shielding layer can also be irradiated by the curing light without being affected by the light-shielding layer, so that the overall curing rate of the optical adhesive layer is more balanced, and the display module after the curing rate is improved can avoid the optical adhesive layer-related edge bubbles and other defects, thereby improving the reliability of the display product. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 shows a structural schematic diagram of a display module provided in some embodiments of the present disclosure;

[0026] Figure 2 FIG. 2 shows a structural schematic diagram of a display module provided in some embodiments of the present disclosure;

[0027] Figure 3 FIG. 3 shows a structural schematic diagram of a display module provided in some embodiments of the present disclosure;

[0028] Figure 4 FIG. 4 shows a schematic diagram of the modulation of light by a groove on a protective cover provided in some embodiments of the present disclosure;

[0029] Figure 5 FIG. 5 shows a schematic diagram of the modulation of light by a groove on a protective cover provided in some embodiments of the present disclosure. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the following will be combined with the drawings of the embodiments of the present disclosure to make a clear and complete description of the technical solutions of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0031] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the ordinary meaning understood by a person of ordinary skill in the art to which the present disclosure belongs. The terms “first”, “second” and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms “one”, “a” or “the” and similar terms do not denote quantity limitation, but denote the existence of at least one. The terms “include” or “contain” and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, without excluding other elements or objects. The terms “connect” or “connected” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper”, “lower”, “left”, “right” and the like only represent relative positional relationships, which can change accordingly when the absolute positions of the described objects change.

[0032] Before the protective cover plate and display module and display device provided by the embodiments of the present disclosure are described in detail, the related art is described as follows:

[0033] In the related art, the display module can have 2D, 2.5D or 3D morphologies, and the protective cover plate has corresponding 2D, 2.5D or 3D morphologies. The display module includes a display panel and a protective cover plate, and the protective cover plate is attached to the light-emitting side of the display panel through an optical adhesive layer (OCA). The design scheme for a curved screen is to realize the curved morphology of the module by conformal attachment of the display panel, the optical adhesive layer and other materials to the 3D protective cover plate.

[0034] In the manufacturing process of the display module, the optical adhesive layer needs to be cured by UV light (ultraviolet light) after the display panel and the protective cover plate are attached. Since the second area of the protective cover plate is coated with light-blocking ink, the part of the optical adhesive layer blocked by the light-blocking ink is not completely cured, and the optical adhesive layer that is not completely cured is prone to bubbles and other defects in reliability tests.

[0035] To solve the above problems, the protective cover plate and the display module and the display device provided by the embodiments of the present disclosure can improve the incomplete curing of the optical adhesive layer and improve product reliability.

[0036] As shown in Figures 1 to 5 The protective cover plate 10 provided by the embodiments of the present disclosure can include a cover plate substrate 110 and a light shielding layer 130. The cover plate substrate 110 can be made of a flexible light-transmitting substrate or a rigid light-transmitting substrate such as a glass cover plate.

[0037] The cover plate substrate 110 has a first area S1 and a second area S2 located on at least one side of the first area S1. For example, the first area S1 is a middle area, and the second area S2 is a peripheral area located on the periphery of the first area S1. For example, when the protective cover plate 10 is applied to a display module, the first area S1 can correspond to the display area of the display module, and the second area S2 can correspond to the peripheral area of the display module.

[0038] The cover plate substrate 110 includes a first surface 110A and a second surface 110B arranged opposite to each other. The second area S2 of the first surface 110A is provided with a groove 120, and the light shielding layer 130 is arranged on the first surface 110A and located in the second area S2.

[0039] The side wall of the groove 120 includes a light-transmitting surface 121 and a light-reflecting surface 122. The contact area of the light-transmitting surface 121 with the light shielding layer 130 accounts for 0-10% of the area of the light-transmitting surface 121. In other words, the orthogonal projection of the light-transmitting surface 121 on the second surface 110B is completely overlapped or almost not overlapped. In this way, the light-transmitting surface 121 can be at least partially not blocked by the light shielding layer 130, so that the light-transmitting surface 121 can at least partially transmit and deflect the light incident from the second surface 110B into the cover plate substrate 110.

[0040] The light-transmitting surface 121 and the light-reflecting surface 122 form a predetermined included angle α. In this way, the light-reflecting surface 122 can at least partially reflect the light deflected by the light-transmitting surface 121 to a target area C. The target area C can be located on the side of the light shielding layer 130 away from the second surface 110B, and the orthogonal projection of the target area C and the light shielding layer 130 on the second surface 110B at least partially overlaps, i.e., is located below the light shielding layer 130.

[0041] It should be noted that the predetermined angle a between the light-transmitting surface 121 and the light-reflecting surface 122 can be the angle between the light-transmitting surface 121 and the light-reflecting surface 122 at the intersection point therebetween. The predetermined angle a can be an angle greater than or equal to 60° and less than or equal to 160°. For example, the predetermined angle a can be an angle greater than or equal to 90° and less than or equal to 130°. In actual applications, the specific value of the predetermined angle a can be adjusted in combination with the coverage width of the target region C in the direction from the first region S1 to the second region S2, the depth of the groove 120 in the direction perpendicular to the first surface 110A, the area of the light-transmitting surface 121 and the light-reflecting surface 122, and the like.

[0042] In the above scheme, the groove 120 is arranged on the first surface 110A of the cover substrate 110 at the second region S2, and is configured to include a light-transmitting surface 121 and a light-reflecting surface 122. The contact area of the light-transmitting surface 121 with the light-blocking layer 130 accounts for 0-10% of the area of the light-transmitting surface 121, i.e., the light-transmitting surface 121 is at least partially uncovered by the light-blocking layer 130, so that the light incident from the second surface 110B can at least partially transmit through the light-transmitting surface 121 and be deflected by the interface of the light-transmitting surface 121. The light-reflecting surface 122 is at a predetermined angle with the light-transmitting surface 121, so as to at least partially reflect the light deflected by the light-transmitting surface 121 to a target region C, which can be located on the side of the light-blocking layer 130 away from the second surface 110B, and the target region C at least partially overlaps with the orthographic projection of the light-blocking layer 130 on the second surface 110B. That is, the light-transmitting surface 121 and the light-reflecting surface 122 of the groove 120 can modulate the light and at least partially reflect the light to the target region C blocked by the light-blocking layer 130.

[0043] Thus, when the protective cover plate 10 is applied to a display module, the protective cover plate 10 and the display panel 20 are attached through the optical adhesive layer 30, and part of the optical adhesive layer 30 is blocked by the light-shielding layer 130 to form a blocked area D. The target area C can include the blocked area D in which the optical adhesive layer 30 is blocked by the light-shielding layer 130. By arranging the groove 120 on the protective cover plate 10, the light-transmitting surface 121 and the light-reflecting surface 122 of the groove 120 modulate and reflect the light incident from the second surface 110B into the interior of the cover plate substrate 110 to the target area C. In this way, the blocked area D in which the optical adhesive layer 30 is blocked by the light-shielding layer 130 can also be irradiated by the curing light without being affected by the light-shielding layer 130, so that the overall curing rate of the optical adhesive layer 30 is more balanced, and the display module after the curing rate is improved can avoid the occurrence of edge bubbles and other defects related to the optical adhesive layer 30, thereby improving the reliability of the display product.

[0044] It should be noted that in the above scheme, the target area C can include the blocked area D in which the optical adhesive layer 30 is blocked by the light-shielding layer 130. However, it is not limited thereto. For example, the target area C can also include other areas that need more light irradiation. In actual application, the shape, size, and other structures of the groove 120 can be adjusted to adjust the shape, position, and other parameters of the light-transmitting surface 121 and the light-reflecting surface 122 to adapt to different needs.

[0045] In some exemplary embodiments, as shown in Figure 4 The light-reflecting surface 122 and the orthographic projection of the light-shielding layer 130 on the second surface 110B at least partially overlap. That is, the light-reflecting surface 122 is arranged to cover the area covered by the light-shielding layer 130. The light-shielding layer 130 can include a first light-shielding portion 131 and a second light-shielding portion 132, wherein the first light-shielding portion 131 covers the surface of the light-reflecting surface 122, and the second light-shielding portion 132 is arranged in the second area S2 other than the light-reflecting surface 122.

[0046] As shown in Figures 1 to 3As shown, a reflective layer 140 is further arranged at the light reflecting surface 122, which can be coated on the side of the first light shielding part 131 away from the light reflecting surface 122. In the above scheme, when the light shielding layer 130 is coated on the second area S2, part of the light shielding layer 130 can be coated in the light reflecting surface 122 to form the first light shielding part 131; and then a layer of the reflective layer 140 is coated on the light shielding layer 130 to meet the light reflecting requirement of the light reflecting surface 122. In this way, the light shielding effect of the second area S2 can be ensured, and the purpose of reflecting the light deflected by the light transmitting surface 121 can be achieved.

[0047] In some exemplary embodiments of the present disclosure, the light shielding layer 130 can include a black ink layer, and the reflective layer 140 can include a silver ink layer. The light shielding layer 130 and the reflective layer 140 can be formed on the cover substrate 110 by coating, but are not limited thereto.

[0048] In addition, in some exemplary embodiments of the present disclosure, the groove 120 is arranged around the first area S1. Through the above scheme, the groove 120 is arranged around the protection cover plate 10, and the curing rate of the optical adhesive layer 30 around the protection cover plate 10 can be ensured.

[0049] In addition, in some exemplary embodiments, as shown, Figures 1 to 3 As shown, the light transmitting surface 121 is located on the side of the light reflecting surface 122 close to the first area S1 in the direction from the second area S2 to the first area S1.

[0050] Since the light shielding layer 130 needs to be coated in the second area S2 of the protection cover plate 10, the outer edge of the light shielding layer 130 away from the first area S1 can extend to the edge of the protection cover plate 10, and the inner edge of the light shielding layer 130 close to the first area S1 can extend to cover the light reflecting surface 122 and not cover the light transmitting surface 121. In this way, at least part of the light incident from the second surface 110B into the inside of the cover substrate 110 can be irradiated on the light transmitting surface 121, and the coverage area requirement of the light shielding layer 130 on the second area S2 can be ensured.

[0051] In some exemplary embodiments, as shown, Figure 4As shown, the light-transmitting surface 121 includes a first inclined surface 1211 inclined relative to the second surface 110B, and the first inclined surface 1211 gradually inclines toward the second surface 110B from a side close to the first area S1 to a side away from the first area S1; the light-reflecting surface 122 includes a second inclined surface 1221 inclined relative to the second surface 110B, and the second inclined surface 1221 gradually inclines away from the second surface 110B from a side close to the first area S1 to a side away from the first area S1.

[0052] With the above scheme, the groove 120 at least includes the first inclined surface 1211 and the second inclined surface 1221, the first inclined surface 1211 is inclined relative to the second surface 110B, and the first inclined surface 1211 gradually inclines toward the second surface 110B from a side close to the first area S1 to a side away from the first area S1, so that the first inclined surface 1211 can be formed as the light-transmitting surface 121. Among the light rays incident on the cover substrate 110 from the second surface 110B, the light rays perpendicular to the first inclined surface 1211 can directly pass through the interface of the first inclined surface 1211 and irradiate into the inner cavity of the groove 120, and then irradiate to the optical adhesive layer 30 located in the target area C, i.e., irradiate to the blocked area D in the optical adhesive layer 30 blocked by the light-blocking layer 130.

[0053] Since the light-reflecting surface 122 is configured as the second inclined surface 1221 inclined relative to the second surface 110B, the second inclined surface 1221 gradually inclines away from the second surface 110B from a side close to the first area S1 to a side away from the first area S1, other angle light rays will be deflected by the interface of the first inclined surface 1211 and reflected by the interface of the light-reflecting surface 122, and please refer to Figure 4 As shown, the light rays passing through the first inclined surface 1211 can also be reflected by the interface 31 of the optical adhesive layer 30 away from the protective cover plate 10 back to the light-reflecting surface 122, thereby achieving multiple reflections.

[0054] In some exemplary embodiments, as Figure 4 As shown, the groove 120 is a groove 120 with a cross-section in the shape of an inverted V, however, the structure of the groove 120 is not limited thereto, for example, the cross-section of the groove 120 can also be in the shape of an inverted trapezoid, etc.

[0055] It should be noted that the first inclined surface 1211 can be a flat inclined surface, or can be a prism-like structure with a micro-concave-convex structure. Moreover, the light-transmitting surface 121 is not limited to being configured as an inclined surface, but can also be configured as a curved surface. For example, in some exemplary embodiments, as Figure 5As shown, the light-transmitting surface 121 includes a first arcuate surface 1212. The first arcuate surface 1212 includes a first end a and a second end b, which are opposite each other in the direction from the first region S1 to the second region S2. The first end a is closer to the first region S1 than the second end b, and the distance between the first end a and the second surface 110B is greater than the distance between the second end b and the second surface 110B. The middle part of the first arcuate surface 1212 protrudes into the inner cavity of the groove 120. By adopting the above scheme, constructing the light-transmitting surface 121 as the first arcuate surface 1212 can form a concave lens structure, further increasing the area of ​​the light-transmitting surface 121, so as to concentrate more light into the blocked area D in the optical adhesive layer.

[0056] Furthermore, the second inclined surface 1221 can be a flat plane or a prism-like structure with concave and convex features. Also, the reflective surface 122 is not limited to being constructed as an inclined surface; it can also be constructed as a curved surface. For example, in some exemplary embodiments, the reflective surface 122 may include a second arcuate surface 1222, which includes a third end c and a fourth end d facing each other in a direction from the first region S1 to the second region S2. The third end c is closer to the first region S1 than the fourth end d, and the distance between the third end c and the second surface 110B is less than the distance between the fourth end d and the second surface 110B. The middle portion of the second arcuate surface 1222 protrudes into the cavity of the groove 120 or is recessed into the cover plate substrate 110.

[0057] Using the above solution, when the protective cover plate 10 is applied to the display module, the optical adhesive layer 30 includes at least a blocked area D that overlaps with the orthographic projection of the light-shielding layer 130 on the second surface 110B. The reflective surface 122 can reflect light while also having a converging or diffusing effect to match the area of ​​the blocked area D in the optical adhesive layer 30.

[0058] In some exemplary embodiments, such as Figure 4 As shown, the orthographic projection of the reflective surface 122 on the second surface 110B at least covers the orthographic projection of the blocked area D on the second surface 110B, to ensure that the blocked area D in the optical adhesive layer 30, which is blocked by the light-shielding layer 130, is completely cured.

[0059] Furthermore, according to some exemplary embodiments of this disclosure, such as Figure 4 As shown, the groove 120 is also filled with a light-transmitting filler 150, and the discontinuity between the side surface of the light-transmitting filler 150 facing away from the second surface 110B and the first surface 110A is less than or equal to a threshold.

[0060] By filling the light-transmitting material in the groove 120, the groove 120 can be filled to increase the flatness when the film layers of the display module are attached, and the light-transmitting filling body 150 and the side wall of the groove 120 can form a refractive interface of light, so that more ideal optical effects can be obtained by combining the depth of the groove 120, the inclination angle of the side wall of the groove 120, and the like.

[0061] In some exemplary embodiments, the light-transmitting filling body 150 can be made of a light-transmitting material that is the same as or different from the material of the optical adhesive layer 30. For example, the material of the light-transmitting filling body 150 includes but is not limited to CPI (polyimide copolymer), PET (polyethylene terephthalate), OCA (optical clear adhesive), and the like.

[0062] It should be noted that the difference between the side surface 151 of the light-transmitting filling body 150 away from the second surface 110B and the first surface 110A is less than or equal to a threshold value, specifically, the side surface 151 of the light-transmitting filling body 150 away from the second surface 110B and the first surface 110A are substantially in the same plane. It should be noted that the threshold value can be 0 or a value close to 0 and fluctuate within a certain range (for example, ±10%).

[0063] As shown in Figure 4 and Figure 5 After the protective cover plate 10 and the display panel 20 are attached by the optical adhesive layer 30 during the attachment process of the display module, the UV curing of the optical adhesive layer 30 is performed. Due to the existence of the groove 120, more UV light can enter the lower part of the light-blocking layer 130, and the optical adhesive layer 30 under the light-blocking layer 130 can be irradiated more sufficiently under the refraction of the transparent filling body and the reflection of the reflection layer 140, thereby improving the curing rate of the optical adhesive layer 30 in this area.

[0064] It should be noted that the protective cover plate 10 provided in the embodiments of the present disclosure can be a 2D, 2.5D, or 3D cover plate, which can be applied to 2D, 2.5D, or 3D display modules.

[0065] Specifically, referring to Figure 1 , the protective cover plate 10 is a 2D cover plate; referring to Figure 2 , the protective cover plate 10 is a 2.5D cover plate; and referring to Figure 3As shown, the protective cover plate 10 is a 3D cover plate. Regardless of whether the protective cover plate 10 is a 2D, 2.5D or 3D cover plate, the curing rate of the optical adhesive layer 30 blocked by the light-blocking layer 130 can be improved by providing the groove 120 on the side surface of the protective cover plate 10 coated with the light-blocking layer 130 and configuring the groove 120 to include the light-transmitting surface 121 and the light-reflecting surface 122.

[0066] It should be noted that for the protective cover plate 10 of different shapes, the shape, size and other parameters of the light-reflecting surface 122 and the light-transmitting surface 121 in the side wall of the groove 120 can be adjusted in combination with actual products to obtain the expected optical effect. In addition, it should be noted that the shape, size and other parameters of the groove 120 can also be adjusted in combination with the manufacturing process precision of the protective cover plate 10.

[0067] In addition, as Figure 1 As shown, in some embodiments, the display module further includes a back film 40 and a support layer 50, which are stacked in sequence on the side of the display panel 20 away from the protective cover plate 10.

[0068] As Figures 1 to 3 As shown, the display module provided in the embodiments of the present disclosure includes the protective cover plate 10 provided in the embodiments of the present disclosure and the display panel 20, the protective cover plate 10 is arranged on the light-emitting side of the display panel 20, and the protective cover plate 10 and the display panel 20 are attached through the optical adhesive layer 30.

[0069] The display device includes but is not limited to a smartphone, a display, a notebook computer, a tablet computer, an electronic photo frame, a driving recorder, a smart wearable device and other devices with display functions. Other essential components of the display device (such as a driving chip) should be understood by those skilled in the art, and are not described here in detail, nor should they be considered as a limitation on the present disclosure. Since the principle of solving the problem of the display module is similar to the principle of solving the problem of the above-mentioned protective cover plate 10, the embodiments of the display module provided in the embodiments of the present disclosure can refer to the above-mentioned embodiments of the protective cover plate 10 provided in the embodiments of the present disclosure, which will not be described here in detail.

[0070] As Figure 4 As shown, in some exemplary embodiments of the present disclosure, the optical adhesive layer 30 at least includes a blocked area D overlapping the orthographic projection of the light-blocking layer 130 on the second surface 110B, and the orthographic projection of the light-reflecting surface 122 on the second surface 110B at least covers the orthographic projection of the blocked area D on the second surface 110B, so as to ensure the curing of the area of the optical adhesive layer 30 blocked by the light-blocking layer 130.

[0071] In addition, the display device provided by the embodiments of the present disclosure includes the display module provided by the embodiments of the present disclosure. Since the principle of solving the problem of the display device is similar to the principle of solving the problem of the protective cover plate 10, the embodiments of the display device provided by the embodiments of the present disclosure can refer to the embodiments of the protective cover plate 10 provided by the embodiments of the present disclosure, and details are not repeated here.

[0072] The following points need to be explained:

[0073] (1) The drawings of the embodiments of the present disclosure only involve the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0074] (2) For the sake of clarity, the thickness of the layer or region is magnified or reduced in the drawings used to describe the embodiments of the present disclosure, that is, these drawings are not drawn according to the actual proportion. It can be understood that when an element such as a layer, a film, a region or a substrate is referred to as being located “on” or “under” another element, the element can be “directly” located on or under another element or there can be an intermediate element.

[0075] (3) In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0076] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A protective cover, characterized in that, include: A cover plate substrate having a first region and a second region located on at least one side of the first region, the cover plate substrate including a first surface and a second surface disposed opposite to each other, and a groove being provided in the second region of the first surface; A light-shielding layer is disposed on the first surface and located in the second region; The sidewall of the groove includes a light-transmitting surface and a reflective surface. The ratio of the contact area between the light-transmitting surface and the light-shielding layer to the area of ​​the light-transmitting surface is 0~10%, and the light-transmitting surface and the reflective surface form a predetermined angle. In the direction from the second region to the first region, the light-transmitting surface is located on the side of the reflective surface closer to the first region; wherein, The light-transmitting surface includes a first inclined surface that is tilted relative to the second surface, and the first inclined surface gradually tilts towards the second surface from the side closer to the first area to the side farther away from the first area; or, the light-transmitting surface includes a first arcuate surface, the first arcuate surface including a first end and a second end opposite to each other in the direction from the first area to the second area, the first end being closer to the first area than the second end, and the distance between the first end and the second surface being greater than the distance between the second end and the second surface, wherein the middle part of the first arcuate surface protrudes into the inner cavity of the groove; And / or, The reflective surface includes a second inclined surface that is tilted relative to the second surface, the second inclined surface gradually tilting away from the second surface from the side closer to the first area to the side farther away from the first area; or, the reflective surface includes a second arcuate surface, the second arcuate surface including a third end and a fourth end opposite to each other in the direction from the first area to the second area, the third end being closer to the first area than the fourth end, and the distance between the third end and the second surface being less than the distance between the fourth end and the second surface, wherein the middle part of the second arcuate surface protrudes into the inner cavity of the groove or is recessed into the interior of the cover plate substrate.

2. The protective cover plate according to claim 1, characterized in that, The light-shielding layer includes a first light-shielding portion covering the surface of the reflective surface, and a reflective layer is also provided on the reflective surface, the reflective layer covering the side of the first light-shielding portion away from the reflective surface.

3. The protective cover plate according to claim 2, characterized in that, The light-shielding layer includes a black ink layer, and the reflective layer includes a silver ink layer.

4. The protective cover plate according to claim 1, characterized in that, The groove is arranged around the first area.

5. The protective cover plate according to claim 1, characterized in that, The groove is also filled with a light-transmitting filler, and the gap between the surface of the light-transmitting filler facing away from the second surface and the first surface is less than or equal to a threshold.

6. A display module, characterized in that, include: The protective cover plate as described in any one of claims 1 to 5; and The protective cover is disposed on the light-emitting side of the display panel, and the protective cover is bonded to the display panel by an optical adhesive layer.

7. The display module according to claim 6, characterized in that, The optical adhesive layer includes at least a blocked area that overlaps with the orthographic projection of the light-shielding layer on the second surface, and the orthographic projection of the reflective surface on the second surface at least covers the orthographic projection of the blocked area on the second surface.

8. A display device, characterized in that, Includes the display module as described in any one of claims 6 to 7.

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