Composite cover plate and display device

Abstract

Disclosed are a composite cover plate and a display device. The composite cover plate comprises a protection layer, a light shielding layer, a bonding layer and a cover plate body which are sequentially arranged; the protection layer is provided with a first surface and a second surface arranged opposite to each other; the light shielding layer is arranged on the second surface and located in a light shielding area; a first through hole is formed in the light shielding layer corresponding to a camera area; the protection layer forms a protruding part in the area enclosed by the light shielding layer, along the direction from the second surface to the first surface; and the protruding part has an equal thickness in the direction from the first surface to the second surface.

Description

Composite cover and display device

[0001] This application claims priority to Chinese patent application No. 202311641725.4 filed on November 30, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display, and in particular to a composite cover plate and a display device. Background Art

[0003] Currently, front-facing cameras can achieve their camera function by opening a camera hole in the display module, and a cover structure is attached to the light-emitting side of the display module to protect it. A common practice in the display industry is to provide a light-shielding layer at the cover structure corresponding to the camera hole to block the opening boundary of the underlying stacked structure for aesthetic purposes. However, the installation of the light-shielding layer can lead to a thickness difference in the cover structure corresponding to the camera hole, causing optical path differences and divergence of light entering the camera hole. This in turn causes optical path distortion of the incident light, affecting the final imaging effect. SUMMARY OF THE INVENTION

[0004] The present application provides a composite cover plate and a display device, which can solve the problem of optical path distortion of incident light when passing through an imaging area on the composite cover plate in the existing composite cover plate.

[0005] In a first aspect, the present application provides a composite cover plate, the composite cover plate being adapted to be attached to a display module, the composite cover plate comprising an imaging area, a light-shielding area at least partially surrounding the imaging area, and a light-transmitting area at least partially surrounding the light-shielding area; the composite cover plate further comprising:

[0006] a protective layer having a first surface and a second surface opposite to each other, wherein the first surface is located on a side of the second surface facing away from the display module;

[0007] a light shielding layer, disposed on the second surface, the light shielding layer being located in the light shielding area, and a first through hole being formed in the light shielding layer at a position corresponding to the imaging area;

[0008] An adhesive layer is provided on a side of the light-shielding layer away from the protective layer;

[0009] a cover plate body, disposed on a side of the adhesive layer facing away from the protective layer, the side of the cover plate body facing away from the adhesive layer being used for laminating with the display module;

[0010] The protective layer corresponding to the area enclosed by the shading layer protrudes along the second surface toward the first surface to form a protruding portion, and the thickness of the protruding portion corresponding to the camera area in the direction from the first surface to the second surface is equal everywhere.

[0011] In a second aspect, the present application further provides a display device, comprising a display module and the composite cover plate described above, wherein the composite cover plate is attached to the light-emitting surface of the display module. Beneficial effects

[0012] Compared to the prior art, the composite cover plate in the present application includes a protective layer, a light-shielding layer, an adhesive layer, and a cover plate body that are sequentially arranged. The protective layer has a first surface and a second surface that are relatively arranged. The light-shielding layer is arranged on the second surface. The light-shielding layer is located in the light-shielding area. A first through hole is formed at a position of the light-shielding layer corresponding to the camera area. The side of the cover plate body facing away from the adhesive layer is used to be bonded to the display module. The area enclosed by the protective layer corresponding to the light-shielding layer protrudes along the direction from the second surface toward the first surface and forms a protrusion. The thickness of the protrusion corresponding to the camera area in the direction from the first surface toward the second surface is the same everywhere. By setting the portion of the protrusion corresponding to the camera area to have a uniform thickness, the present application can avoid the incident light entering the camera area from generating an optical path difference or divergence when passing through the protective layer, thereby avoiding optical path distortion of the incident light and improving the imaging quality of the camera area after the composite cover plate is bonded to the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic structural diagram of a composite cover plate provided in an embodiment of the present application.

[0014] FIG2 is a schematic structural diagram of another composite cover plate provided in an embodiment of the present application.

[0015] FIG3 is a schematic structural diagram of another composite cover plate provided in an embodiment of the present application.

[0016] FIG4 is a schematic structural diagram of a display device provided in an embodiment of the present application.

[0017] FIG5 is a schematic structural diagram of another display device provided in an embodiment of the present application.

[0018] Description of reference numerals:

[0019] 10. Display device;

[0020] 100, composite cover plate; S1, camera area; S2, light-shielding area; S3, light-transmitting area; 110, protective layer; 111, first surface; 112, second surface; 113, protrusion; 120, light-shielding layer; 121, first through hole; 130, adhesive layer; 131, second through hole; 140, cover plate body; 141, third through hole; 150, filling layer;

[0021] 200, display module; 210, support layer; 220, buffer layer; 230, back plate; 240, display panel; 250, polarizer; 260, camera hole; 270, camera. Modes for Carrying Out the Invention

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a 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 those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0023] The embodiments of the present application provide a composite cover plate and a display device, which are described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments.

[0024] As shown in Figures 1 to 3, the composite cover plate 100 includes a camera area S1, a light-shielding area S2 that at least partially surrounds the camera area S1, and a light-transmitting area S3 that at least partially surrounds the light-shielding area S2. The composite cover plate 100 is used to be attached to the display module 200, and the camera area S1 of the composite cover plate 100 corresponds to the area where the camera hole 260 on the display module 200 is located. The camera hole 260 on the display module 200 is installed with optical elements such as a camera 270 for performing operations such as taking photos or videos. The light-shielding area S2 of the composite cover plate 100 is arranged around the camera area S1, and is used to block the edge structure of the camera hole 260 on the display module 200 to avoid affecting the imaging and display quality. The light-transmitting area S3 of the composite cover plate 100 corresponds to the display area of ​​the display module 200, and is used to transmit the display image of the display module 200.

[0025] The composite cover plate 100 includes a protective layer 110 having a first surface 111 and a second surface 112 disposed opposite each other. The first surface 111 is located on the side of the second surface 112 facing away from the display module 200. The protective layer 110 serves as a protective structure for the composite cover plate 100 and is provided on the entire surface. When the composite cover plate 100 is attached to the display module 200, the protective layer 110 also provides a certain degree of protection for the display module 200, preventing the display module 200 from being damaged by the external environment or applied forces. The protective layer 110 can be made of a light-transmitting material such as polyethylene terephthalate (PET) or transparent polyimide (CPI).

[0026] The composite cover plate 100 includes a light-shielding layer 120, which is disposed on the second surface 112 of the protective layer 110 and is located in the light-shielding area S2. A first through-hole 121 is formed in the light-shielding layer 120 at a position corresponding to the imaging area S1. That is, the first through-hole 121 corresponds to the imaging hole 260 on the display module 200, so that incident light passes through the protective layer 110 and smoothly enters the imaging hole 260 of the display module 200 through the first through-hole 121 for imaging. The material used for the light-shielding layer 120 can be ink, which is used to block the underlying membrane structure, that is, the edge structure of the imaging hole 260 on the display module 200, to avoid affecting the final imaging and display quality.

[0027] The composite cover 100 includes an adhesive layer 130 and a cover body 140. The adhesive layer 130 is disposed on the side of the light-shielding layer 120 facing away from the protective layer 110. The adhesive layer 130 can be an optical adhesive layer, which has both adhesive properties and light transmittance. The cover body 140 can be made of a light-transmitting material such as ultra-thin glass (UTG) to allow the display image of the display module 200 to pass through normally. The cover body 140 is disposed on the side of the adhesive layer 130 facing away from the protective layer 110, that is, the cover body 140 is connected to the protective layer 110 via the adhesive layer 130. The side of the cover body 140 facing away from the adhesive layer 130 is used to bond with the display module 200. That is, after the composite cover 100 is manufactured, the entire cover body 140 is bonded to the display module 200 with the side facing away from the adhesive layer 130. When bonding, a layer of optical adhesive layer can be first set on the surface of the cover body 140 or the display module 200, and then bonding can be performed.

[0028] The area of ​​the protective layer 110 corresponding to the area enclosed by the light-shielding layer 120 protrudes along the second surface 112 toward the first surface 111, forming a protrusion 113. This is because the light-shielding layer 120 is only provided on the second surface 112 of the protective layer 110 at a location corresponding to the light-shielding area S2. When the cover body 140 is bonded to the protective layer 110 via the adhesive layer 130, the light-shielding layer 120, under the action of the cover body 140, presses against the protective layer 110, causing the area of ​​the protective layer 110 corresponding to the area enclosed by the light-shielding layer 120, that is, the location on the protective layer 110 corresponding to the light-shielding area S2 and the imaging area S1, to protrude away from the cover body 140, forming a protrusion 113. In the present application, the thickness of the portion of the protrusion 113 corresponding to the imaging area S1 in the direction from the first surface 111 to the second surface 112 is set to be equal everywhere, that is, the thickness of the portion of the protrusion 113 corresponding to the imaging area S1 is uniform, so that the incident light entering the imaging area S1 will not produce an optical path difference or divergence when passing through the protective layer 110, thereby avoiding optical path distortion of the incident light and improving the imaging quality of the imaging area S1 after the composite cover 100 is attached to the display module 200.

[0029] In the embodiment of the present application, the composite cover plate 100 includes a protective layer 110, a light-shielding layer 120, an adhesive layer 130 and a cover plate body 140, which are arranged in sequence. The protective layer 110 has a first surface 111 and a second surface 112 that are arranged opposite to each other, and the light-shielding layer 120 is arranged on the second surface 112. The light-shielding layer 120 is located in the light-shielding area S2, and a first through hole 121 is formed at a position of the light-shielding layer 120 corresponding to the camera area S1. The side of the cover plate body 140 facing away from the adhesive layer 130 is used to be bonded to the display module 200. Among them, the area of ​​the protective layer 110 corresponding to the light-shielding layer 120 protrudes along the direction from the second surface 112 to the first surface 111 and forms a protrusion 113, and the thickness of the part of the protrusion 113 corresponding to the camera area S1 in the direction from the first surface 111 to the second surface 112 is equal everywhere. The present application sets the portion of the protrusion 113 corresponding to the camera area S1 to have a uniform thickness, which can prevent the incident light entering the camera area S1 from generating optical path difference or divergence when passing through the protective layer 110, thereby avoiding optical path distortion of the incident light and improving the imaging quality of the camera area S1 after the composite cover 100 is attached to the display module 200.

[0030] Optionally, as shown in Figures 1 and 2, a second through hole 131 is provided on the adhesive layer 130 at a position corresponding to the first through hole 121, and the orthographic projection of the sidewall of the second through hole 131 on the protective layer 110 is located within the orthographic projection of the light-shielding layer 120 on the protective layer 110. That is, when the adhesive layer 130 is applied to the light-shielding layer 120, the adhesive layer 130 does not extend into the first through hole 121 on the light-shielding layer 120, but only covers or partially covers the side of the light-shielding layer 120 facing away from the protective layer 110, so as to avoid affecting the thickness uniformity of the film structure corresponding to the imaging area S1, thereby preventing the incident light entering the imaging area S1 from generating an optical path difference or divergence due to the thickness difference, and further preventing the incident light from being distorted in the optical path.

[0031] In some embodiments, the light-shielding layer 120 is annular, with a first spacing between the sidewall of the second through-hole 131 and the inner wall of the light-shielding layer 120, and a second spacing between the sidewall of the second through-hole 131 and the outer wall of the light-shielding layer 120. That is, the adhesive layer 130 only partially covers the side of the light-shielding layer 120 facing away from the protective layer 110, meaning that the sidewall of the second through-hole 131 is recessed relative to the sidewall of the first through-hole 121. This design allows the light-shielding layer 120 to effectively shield the edge of the second through-hole 131 in the adhesive layer 130, preventing direct visibility of the edge structure of the second through-hole 131 on the adhesive layer 130 even at a certain tilted viewing angle, thereby improving imaging and display quality.

[0032] The first spacing is greater than or equal to 50 microns, and the second spacing is greater than or equal to 50 microns. If the first spacing and / or the second spacing are too small, the light shielding layer 120 will not be able to effectively block the edge structure of the second through hole 131, affecting imaging and display quality. In the actual production process, the first spacing and the second spacing can be set to 50 microns, 100 microns, 200 microns, 300 microns, 400 microns, or 500 microns, respectively. The specific values ​​can be selected and adjusted according to actual design requirements and are not particularly limited here.

[0033] Correspondingly, the width of the light-shielding layer 120 (the difference between the inner diameter and the outer diameter of the light-shielding layer 120, that is, the distance between the inner wall and the outer wall of the light-shielding layer 120) can be set to be greater than or equal to 100 microns and less than or equal to 1000 microns. If the width of the light-shielding layer 120 is too large, it will affect the area ratio of the display screen after the composite cover plate 100 is attached to the display module 200; if the width of the light-shielding layer 120 is too small, the light-shielding layer 120 will not be able to effectively block the edge structure of the second through hole 131, affecting the imaging and display quality. In the actual production process, the width of the light-shielding layer 120 can be set to 100 microns, 200 microns, 400 microns, 600 microns, 800 microns or 1000 microns, etc. The specific value can be selected and adjusted according to actual design requirements, and there is no special restriction here.

[0034] It should be noted that when the adhesive layer 130 is disposed on the side of the light-shielding layer 120 facing away from the protective layer 110, the adhesive layer 130 can be first formed, and the second through hole 131 can be opened in the adhesive layer 130. The adhesive layer 130 can then be laminated to the protective layer 110 printed with the light-shielding layer 120. Alternatively, a circular shielding area can be provided on the protective layer 110 printed with the light-shielding layer 120, and then coating can be performed outside the shielding area to form the adhesive layer 130 with the second through hole 131. The specific manufacturing method can be selected and adjusted according to actual process requirements and is not particularly limited here.

[0035] In other embodiments, as shown in FIG2 , a third through hole 141 is provided on the cover body 140 at a position corresponding to the second through hole 131, that is, the third through hole 141, the second through hole 131, and the first through hole 121 are interconnected to prevent the formation of an air layer between the cover body 140 and the protective layer 110 after the cover body 140 and the adhesive layer 130 are attached to each other, thereby preventing adverse effects on the imaging of the camera area S1. The orthographic projection of the side wall of the third through hole 141 on the protective layer 110 is located within the orthographic projection of the light-shielding layer 120 on the protective layer 110, that is, the side wall of the third through hole 141 is designed to be retracted relative to the side wall of the first through hole 121. This design allows the light-shielding layer 120 to effectively block the edge of the third through hole 141 of the cover body 140, thereby improving imaging and display quality.

[0036] In yet other embodiments, the orthographic projection of the sidewall of the third through hole 141 on the protective layer 110 lies within the orthographic projection of the adhesive layer 130 on the protective layer 110. That is, the sidewall of the third through hole 141 is recessed relative to the sidewall of the second through hole 131. This design prevents the edge structure of the third through hole 141 on the cover body 140 from being directly visible even when viewed at a certain angle, thereby improving imaging and display quality.

[0037] A third spacing is defined between the sidewalls of the third through hole 141 and the sidewalls of the second through hole 131, and the third spacing is greater than or equal to 50 microns and less than or equal to 250 microns. If the third spacing is too small, the inner wall of the light-shielding layer 120 may not effectively shield the edge structure of the third through hole 141 on the cover body 140 at certain oblique viewing angles, thereby affecting imaging and display quality. If the third spacing is too large, and only a light-transmitting adhesive layer 130 is disposed between the protective layer 110 and the cover body 140, the outer wall of the light-shielding layer 120 may not effectively shield the edge structure of the third through hole 141 on the cover body 140 at certain oblique viewing angles, thereby affecting imaging and display quality.

[0038] In the actual production process, the third spacing can be set to 50 microns, 100 microns, 150 microns, 200 microns or 250 microns, etc. The specific value can be selected and adjusted according to actual design requirements, and there is no special restriction here.

[0039] It should be noted that when attaching the cover body 140 to the side of the adhesive layer 130 facing away from the protective layer 110, it is necessary to first perform a hole design on the cover body 140 to form the third through hole 141. This hole design can be performed using a chemical etching process. After the hole design is completed, the third through hole 141 on the cover body 140 is aligned with the second through hole 131 on the adhesive layer 130 and attached to the adhesive layer 130. In the embodiment of the present application, by designing the sidewalls of the third through hole 141 to be recessed relative to the sidewalls of the second through hole 131, it is also possible to prevent the sidewalls of the third through hole 141 of the cover body 140 from protruding into the sidewalls of the second through hole 131 of the adhesive layer 130 due to attachment errors during the attaching process of the cover body 140, thereby preventing the light shielding layer 120 from effectively shielding the edge structure of the third through hole 141 on the cover body 140, thereby affecting imaging and display quality.

[0040] Optionally, as shown in FIG3 , the composite cover plate 100 further includes a filling layer 150, which is disposed within the first through hole 121, and an adhesive layer 130 covers the light-shielding layer 120 and the filling layer 150. That is, the light-shielding layer 120 and the filling layer 150 are disposed entirely on the second surface 112 of the protective layer 110 at positions corresponding to the imaging area S1 and the light-shielding area S2, and the adhesive layer 130 directly and entirely covers the light-shielding layer 120, the filling layer 150, and the protective layer 110, so that the cover plate body 140 and the adhesive layer 130 are bonded to each other over their entire surfaces, which is beneficial for improving the bonding stability of the cover plate body 140, thereby improving the overall structural stability of the composite cover plate 100.

[0041] In the direction from the first surface 111 to the second surface 112 , the thickness of the filling layer 150 is equal to the thickness of the light shielding layer 120 . That is, after the filling layer 150 is filled into the first through hole 121, the side of the filling layer 150 facing away from the protective layer 110 is flush with the side of the shading layer 120 facing away from the protective layer 110, so that after the cover body 140 is attached to the adhesive layer 130, the shading layer 120 and the filling layer 150 simultaneously squeeze the protective layer 110 under the action of the cover body 140, so as to further ensure the uniformity of the thickness of the protrusion 113 formed by the position corresponding to the shading area S2 and the camera area S1 on the protective layer 110 protruding in the direction away from the cover body 140, so that the incident light entering the camera area S1 will not produce an optical path difference or divergence when passing through the protective layer 110 and the filling layer 150, thereby avoiding optical path distortion of the incident light and improving the imaging quality of the camera area S1 after the composite cover 100 is attached to the display module 200.

[0042] In some embodiments, the filling layer 150 fills the first through hole 121 and covers the side of the light shielding layer 120 facing away from the protective layer 110, and the adhesive layer 130 covers the filling layer 150. That is, the maximum thickness of the filling layer 150 is the sum of the thickness of the light shielding layer 120 and the thickness of the filling layer 150 on the light shielding layer 120. By covering the filling layer 150 on the light-shielding layer 120, it is possible to avoid the thickness of the filling layer 150 being less than the thickness of the light-shielding layer 120 due to curing shrinkage after the filling layer 150 is filled into the first through hole 121, so as to further ensure the uniformity of the thickness of the protrusion 113 formed by the position of the protective layer 110 corresponding to the light-shielding area S2 and the camera area S1 protruding in the direction away from the cover body 140, so that the incident light entering the camera area S1 will not produce an optical path difference or divergence when passing through the protective layer 110 and the filling layer 150, thereby avoiding optical path distortion of the incident light and improving the imaging quality of the camera area S1 after the composite cover 100 is adhered to the display module 200.

[0043] The thickness of the filling layer 150 in the direction from the first surface 111 to the second surface 112 can be set to be greater than or equal to 0.5 microns and less than or equal to 20 microns. If the thickness of the filling layer 150 is too thin, it may result in the filling layer 150 not being able to ensure flushness with the light shielding layer 120 due to the influence of manufacturing precision during the manufacturing process; if the thickness of the filling layer 150 is too thick, the overall thickness of the composite cover plate 100 will be too large, which is not conducive to the lightweight design of the display device 10 and will also reduce the utilization rate of the incident light after passing through the protective layer 110 and the filling layer 150, thereby affecting the imaging effect.

[0044] During the actual production process, the thickness of the filling layer 150 can be set to 0.5 microns, 1 micron, 2 microns, 5 microns, 10 microns, 15 microns or 20 microns, etc. The specific thickness value can be selected and adjusted according to actual design requirements, and there is no special restriction here.

[0045] Correspondingly, in the direction from the first surface 111 to the second surface 112, the thickness of the light shielding layer 120 can be set to be greater than or equal to 0.5 microns and less than or equal to 5 microns. If the thickness of the light shielding layer 120 is too thin, the light shielding layer 120 will have a poor shielding effect on the edge structure of the underlying film layer, affecting imaging and display quality. If the thickness of the light shielding layer 120 is too thick, the overall thickness of the composite cover plate 100 will be too large, which is not conducive to the lightweight design of the display device 10 and will also cause the thickness of the filling layer 150 to be too large, thereby reducing the utilization rate of the incident light after passing through the protective layer 110 and the filling layer 150 in sequence, thereby affecting the imaging effect.

[0046] During the actual production process, the thickness of the light-shielding layer 120 can be set to 0.5 microns, 1 micron, 2 microns, 3 microns, 4 microns or 5 microns, etc. The specific thickness value can be selected and adjusted according to actual design requirements, and there is no special restriction here.

[0047] It should be noted that the filling layer 150 is light-transmissive and can be made of a transparent ester material that can be photocured or heat-cured. This allows incident light to sequentially pass through the protective layer 110 and the filling layer 150 before entering the camera hole 260 of the display module 200, thereby generating an image. When manufacturing the filling layer 150, it can be first applied and leveled by liquid coating and then cured, or it can be directly attached. The specific formation method can be selected and adjusted according to the actual manufacturing process and is not particularly limited here.

[0048] Secondly, an embodiment of the present application also provides a display device, which includes a composite cover plate. The specific structure of the composite cover plate refers to the above embodiment. Since this display device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0049] As shown in Figures 4 and 5, the display device 10 includes a display module 200 and a composite cover plate 100. The composite cover plate 100 is attached to the light-emitting surface of the display module 200, that is, the composite cover plate 100 is located on the light-emitting side of the display module 200 to protect the display module 200. A camera hole 260 is provided on the display module 200, and an optical element such as a camera 270 is provided in the camera hole 260 for performing operations such as taking photos or videos. The display module 200 includes a stacked support layer 210, a buffer layer 220, a backplane 230, a display panel 240, and a polarizer 250. The composite cover plate 100 is attached to the polarizer 250 of the display module 200 via an optical adhesive layer.

[0050] The composite cover plate 100 includes a camera area S1, a light-shielding area S2 that at least partially surrounds the camera area S1, and a light-transmitting area S3 that at least partially surrounds the light-shielding area S2. When the composite cover plate 100 is attached to the display module 200, the camera area S1 of the composite cover plate 100 corresponds to the camera hole 260 on the display module 200, so that the incident light passes through the camera area S1 and enters the camera hole 260. The light-shielding area S2 of the composite cover plate 100 is used to block the edge structure of the camera hole 260 on the display module 200 to prevent the human eye from directly observing the edge structure of the camera hole 260 and affecting the imaging and display quality. The light-transmitting area S3 of the composite cover plate 100 corresponds to the display area of ​​the display module 200 and is used to transmit the display image of the display module 200 to ensure the normal display of the display device 10.

[0051] Specifically, the composite cover plate 100 includes a protective layer 110, a light-shielding layer 120, an adhesive layer 130 and a cover plate body 140, which are arranged in sequence. The protective layer 110 has a first surface 111 and a second surface 112 that are arranged opposite to each other, and the light-shielding layer 120 is arranged on the second surface 112. The light-shielding layer 120 is located in the light-shielding area S2, and a first through hole 121 is formed at a position of the light-shielding layer 120 corresponding to the camera area S1. The side of the cover plate body 140 facing away from the adhesive layer 130 is used to be bonded to the display module 200. Among them, the area of ​​the protective layer 110 corresponding to the light-shielding layer 120 protrudes along the direction of the second surface 112 toward the first surface 111 and forms a protrusion 113, and the thickness of the part of the protrusion 113 corresponding to the camera area S1 in the direction from the first surface 111 to the second surface 112 is equal everywhere. The present application sets the portion of the protrusion 113 corresponding to the camera area S1 to have a uniform thickness, which can prevent the incident light entering the camera area S1 from generating optical path difference or divergence when passing through the protective layer 110, thereby avoiding optical path distortion of the incident light and improving the imaging quality of the camera area S1 after the composite cover 100 is attached to the display module 200.

[0052] The above is a detailed introduction to a composite cover plate and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A composite cover plate, the composite cover plate being used to be attached to a display module, the composite cover plate comprising an imaging area, a light shielding area at least partially surrounding the imaging area, and a light transmitting area at least partially surrounding the light shielding area; The composite cover plate further comprises: A protective layer having a first surface and a second surface arranged opposite to each other, wherein the first surface is located on a side of the second surface away from the display module; A light shielding layer is provided on the second surface, the light shielding layer is located in the light shielding area, and a first through hole is formed at a position of the light shielding layer corresponding to the imaging area; An adhesive layer is arranged on a side of the light shielding layer away from the protective layer; A cover plate body, arranged on a side of the adhesive layer away from the protective layer, and the side of the cover plate body away from the adhesive layer is used to be attached to the display module; The protective layer corresponding to the area enclosed by the shading layer protrudes from the second surface toward the first surface to form a protruding portion, and the protruding portion corresponding to the camera area has the same thickness in the direction from the first surface to the second surface.

2. The composite cover plate according to claim 1, wherein: A second through hole is opened on the adhesive layer at a position corresponding to the first through hole, and the orthographic projection of the side wall of the second through hole on the protective layer is located within the orthographic projection of the light shielding layer on the protective layer.

3. The composite cover plate according to claim 2, wherein: The light-shielding layer is annular, and there is a first distance between the side wall of the second through hole and the inner wall of the light-shielding layer, and there is a second distance between the side wall of the second through hole and the outer wall of the light-shielding layer; the first distance is greater than or equal to 50 microns; and the second distance is greater than or equal to 50 microns.

4. The composite cover plate according to claim 2 or 3, wherein: The width of the light shielding layer is greater than or equal to 100 micrometers and less than or equal to 1000 micrometers.

5. The composite cover plate according to claim 2, wherein: A third through hole is provided on the cover body at a position corresponding to the second through hole, and an orthographic projection of a side wall of the third through hole on the protective layer is located within an orthographic projection of the light shielding layer on the protective layer.

6. The composite cover plate according to claim 5, wherein: The orthographic projection of the side wall of the third through hole on the protective layer is located within the orthographic projection of the adhesive layer on the protective layer.

7. The composite cover plate according to claim 6, wherein: A third distance is provided between the sidewall of the third through hole and the sidewall of the second through hole; the third distance is greater than or equal to 50 micrometers and less than or equal to 250 micrometers.

8. The composite cover plate according to claim 1, wherein: The composite cover plate also includes a filling layer, which is filled in the first through hole, and the adhesive layer covers the light-shielding layer and the filling layer; in the direction from the first surface to the second surface, the thickness of the filling layer is equal to the thickness of the light-shielding layer.

9. The composite cover plate according to claim 1, wherein: The composite cover plate further includes a filling layer, which fills the first through hole and covers a side of the light shielding layer away from the protective layer, and the adhesive layer covers the filling layer.

10. The composite cover plate according to claim 8 or 9, wherein: In a direction from the first surface to the second surface, the thickness of the filling layer is greater than or equal to 0.5 micrometers and less than or equal to 20 micrometers, and the thickness of the light shielding layer is greater than or equal to 0.5 micrometers and less than or equal to 5 micrometers.

11. A display device, comprising a display module and the composite cover plate according to claim 1, wherein the composite cover plate is attached to a light emitting surface of the display module.

12. The display device according to claim 11, wherein: The display module comprises a stacked support layer, a buffer layer, a back plate, a display panel and a polarizer, and the composite cover plate is attached to the polarizer.

13. The display device according to claim 11, wherein: A second through hole is opened on the adhesive layer at a position corresponding to the first through hole, and the orthographic projection of the side wall of the second through hole on the protective layer is located within the orthographic projection of the light shielding layer on the protective layer.

14. The display device according to claim 13, wherein: The light-shielding layer is annular, and there is a first distance between the side wall of the second through hole and the inner wall of the light-shielding layer, and there is a second distance between the side wall of the second through hole and the outer wall of the light-shielding layer; the first distance is greater than or equal to 50 microns; and the second distance is greater than or equal to 50 microns.

15. The display device according to claim 13, wherein: A third through hole is provided on the cover body at a position corresponding to the second through hole, and an orthographic projection of a side wall of the third through hole on the protective layer is located within an orthographic projection of the light shielding layer on the protective layer.

16. The display device according to claim 15, wherein: The orthographic projection of the side wall of the third through hole on the protective layer is located within the orthographic projection of the adhesive layer on the protective layer.

17. The display device according to claim 16, wherein: A third distance is provided between the sidewall of the third through hole and the sidewall of the second through hole; the third distance is greater than or equal to 50 micrometers and less than or equal to 250 micrometers.

18. The display device according to claim 11, wherein: The composite cover plate also includes a filling layer, which is filled in the first through hole, and the adhesive layer covers the light-shielding layer and the filling layer; in the direction from the first surface to the second surface, the thickness of the filling layer is equal to the thickness of the light-shielding layer.

19. The display device according to claim 11, wherein: The composite cover plate further includes a filling layer, which fills the first through hole and covers a side of the light shielding layer away from the protective layer, and the adhesive layer covers the filling layer.

20. The display device according to claim 18 or 19, wherein: In a direction from the first surface to the second surface, the thickness of the filling layer is greater than or equal to 0.5 micrometers and less than or equal to 20 micrometers, and the thickness of the light shielding layer is greater than or equal to 0.5 micrometers and less than or equal to 5 micrometers.

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