Composite cover plate and display device

Abstract

Embodiments of the present application disclose a composite cover plate and a display device. The composite cover plate comprises a protection layer, a light shielding layer, an adhesive layer and a cover plate body arranged in sequence, the protection layer has a first surface and a second surface arranged oppositely, the light shielding layer is arranged on the second surface, the light shielding layer is located in a light shielding area, the light shielding layer is formed with a first through hole corresponding to a camera area, and the side of the cover plate body away from the adhesive layer is used for being attached to a display module. Wherein, the area enclosed by the protection layer corresponding to the light shielding layer protrudes along the direction of the second surface towards the first surface and forms a protruding part, and the thickness of the protruding part corresponding to the camera area is equal in the direction of the first surface towards the second surface. By setting the part corresponding to the camera area on the protruding part as uniform thickness, the present application can avoid the incident light entering the camera area from producing optical path difference or divergence when passing through the protection layer, thereby avoiding the optical path distortion of the incident light and improving the imaging quality.

Description

Technical Field

[0001] This application relates to the field of displays, specifically to a composite cover plate and a display device. Background Technology

[0002] Currently, front-facing cameras achieve their recording function by creating a camera hole in the display module, with a cover plate structure attached to the light-emitting side of the display module to protect it. It is a common practice in the display industry to place a light-shielding layer at the camera hole location on the cover plate structure to block the boundary of the lower stacked structure's opening for aesthetic purposes. However, in existing technologies, the addition of a light-shielding layer to the cover plate structure results in a thickness difference in the area corresponding to the camera hole. This causes optical path differences and divergence in the light entering the camera hole, leading to optical path distortion of the incident light and affecting the final image quality. Summary of the Invention

[0003] This application provides a composite cover plate and a display device, which can solve the problem of optical path distortion that occurs when incident light passes through the camera area on the composite cover plate in existing composite cover plates.

[0004] This application provides a composite cover plate for bonding to a display module. The composite cover plate includes a camera area, a light-shielding area at least partially surrounding the camera area, and a light-transmitting area at least partially surrounding the light-shielding area. The composite cover plate further includes:

[0005] A protective layer has a first surface and a second surface disposed opposite to each other, wherein the first surface is located on the side of the second surface opposite to the display module;

[0006] A light-shielding layer is disposed on the second surface, the light-shielding layer is located in the light-shielding area, and a first through hole is formed in the light-shielding layer corresponding to the position of the camera area;

[0007] An adhesive layer is disposed on the side of the light-shielding layer opposite to the protective layer;

[0008] The cover plate body is disposed on the 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 adhere to the display module;

[0009] The protective layer protrudes from the area enclosed by the light-shielding layer along the direction from the second surface toward the first surface, forming a protrusion. The portion of the protrusion corresponding to the camera area has the same thickness everywhere along the direction from the first surface toward the second surface.

[0010] Optionally, in some embodiments of this application, a second through hole is provided on the adhesive layer at the position corresponding to the first through hole, and the orthographic projection of the sidewall of the second through hole on the protective layer is located within the orthographic projection of the light-shielding layer on the protective layer.

[0011] Optionally, in some embodiments of this application, the light-shielding layer is annular, and there is a first distance between the sidewall of the second through hole and the inner wall of the light-shielding layer, and a second distance between the sidewall of the second through hole and the outer wall of the light-shielding layer; the first distance is greater than or equal to 50 micrometers; and the second distance is greater than or equal to 50 micrometers.

[0012] Optionally, in some embodiments of this application, a third through hole is provided on the cover plate body at the position corresponding to the second through hole, and the orthographic projection of the sidewall of the third through hole on the protective layer is located within the orthographic projection of the light-shielding layer on the protective layer.

[0013] Optionally, in some embodiments of this application, the orthographic projection of the sidewall of the third through hole onto the protective layer lies within the orthographic projection of the adhesive layer onto the protective layer.

[0014] Optionally, in some embodiments of this application, there is a third distance 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.

[0015] Optionally, in some embodiments of this application, the composite cover plate further includes a filling layer that fills 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.

[0016] Optionally, in some embodiments of this application, the composite cover plate further includes a filling layer that fills the first through hole and covers the side of the light-shielding layer opposite to the protective layer, and the adhesive layer covers the filling layer.

[0017] Optionally, in some embodiments of this application, in the 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.

[0018] Accordingly, this application also provides a display device, which includes a display module and the composite cover plate described in any of the above claims, wherein the composite cover plate is attached to the light-emitting surface of the display module.

[0019] In this embodiment, the composite cover plate includes a protective layer, a light-shielding layer, an adhesive layer, and a cover plate body arranged sequentially. The protective layer has a first surface and a second surface disposed opposite to each other. The light-shielding layer is disposed on the second surface and located in the light-shielding area. A first through hole is formed in the light-shielding layer at the position corresponding to the camera area. The side of the cover plate body away from the adhesive layer is used to adhere to the display module. The area enclosed by the protective layer and the light-shielding layer protrudes along the direction from the second surface toward the first surface, forming a protrusion. The thickness of the protrusion corresponding to the camera area is uniform throughout the direction from the first surface toward the second surface. By making the portion of the protrusion corresponding to the camera area uniform in thickness, this application can avoid the incident light entering the camera area from generating an optical path difference or diverging 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 adhered to the display module. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a composite cover plate provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of another composite cover plate provided in an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of another composite cover plate provided in an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of another display device provided in an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. Display device;

[0028] 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, Filler layer;

[0029] 200, Display module; 210, Support layer; 220, Buffer layer; 230, Back panel; 240, Display panel; 250, Polarizing film; 260, Camera hole; 270, Camera. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0031] This application provides a composite cover plate and a display device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0032] like Figures 1 to 3 As shown, 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. The camera area S1 of the composite cover plate 100 corresponds to the area where the camera hole 260 is located on the display module 200. Optical elements such as a camera 270 are installed in the camera hole 260 on the display module 200 for taking pictures or videos. The light-shielding area S2 of the composite cover plate 100 surrounds 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.

[0033] The composite cover plate 100 includes a protective layer 110. The protective layer 110 has a first surface 111 and a second surface 112 disposed opposite to each other. The first surface 111 is located on the side of the second surface 112 facing away from the display module 200. As a protective structure of the composite cover plate 100, the protective layer 110 is provided on the entire surface. When the composite cover plate 100 is attached to the display module 200, the protective layer 110 can also provide a certain degree of protection for the display module 200, preventing the display module 200 from being damaged by the external environment or forces. The material of the protective layer 110 can be a light-transmitting material such as polyethylene terephthalate (PET) or transparent polyimide (CPI).

[0034] 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 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 can pass through the protective layer 110 and smoothly enter 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, used to block the underlying film 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.

[0035] The composite cover plate 100 includes an adhesive layer 130 and a cover plate body 140. The adhesive layer 130 is disposed on the side of the light-shielding layer 120 away from the protective layer 110. The adhesive layer 130 can be an optical adhesive layer, which has both adhesive function and light transmission. The cover plate body 140 can be a light-transmitting material such as ultra-thin glass (UTG) so that the display screen of the display module 200 can pass through normally. The cover plate body 140 is disposed on the side of the adhesive layer 130 away from the protective layer 110. That is, the cover plate body 140 is connected to the protective layer 110 through the adhesive layer 130. The side of the cover plate body 140 away from the adhesive layer 130 is used to bond with the display module 200. That is, after the composite cover plate 100 is manufactured, the entire cover plate body 140 away from the adhesive layer 130 is bonded to the display module 200. During bonding, an optical adhesive layer can be first set on the surface of the cover plate body 140 or the display module 200, and then the bonding is performed.

[0036] The area enclosed by the protective layer 110 and 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 the position corresponding to the light-shielding area S2. When the cover plate body 140 is attached to the protective layer 110 through the adhesive layer 130, the light-shielding layer 120 will squeeze the protective layer 110 under the action of the cover plate body 140, so that the area enclosed by the protective layer 110 and the light-shielding layer 120, that is, the position on the protective layer 110 corresponding to the light-shielding area S2 and the camera area S1, will protrude away from the cover plate body 140 and form a protrusion 113. In this application, the thickness of the portion of the protrusion 113 corresponding to the camera 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 camera area S1 is uniform, so that the incident light entering the camera area S1 will not produce 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 plate 100 is attached to the display module 200.

[0037] In this embodiment, 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 arranged sequentially. The protective layer 110 has a first surface 111 and a second surface 112 arranged opposite to each other. The light-shielding layer 120 is disposed on the second surface 112 and is located in the light-shielding area S2. The light-shielding layer 120 has a first through hole 121 formed at the position corresponding to the camera area S1. The side of the cover plate body 140 away from the adhesive layer 130 is used to attach to the display module 200. The area of ​​the protective layer 110 corresponding to the light-shielding layer 120 protrudes along the second surface 112 toward the first surface 111 and forms a protrusion 113. The part of the protrusion 113 corresponding to the camera area S1 has the same thickness everywhere in the direction from the first surface 111 toward the second surface 112. This 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 having an optical path difference or diverging 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 plate 100 is attached to the display module 200.

[0038] Optional, such as Figure 1 and Figure 2As shown, a second through hole 131 is provided on the adhesive layer 130 at the position corresponding to the first through hole 121. 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 covers 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 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 avoiding the incident light entering the imaging area S1 from having an optical path difference or diverging due to the thickness difference, and thus avoiding optical path distortion of the incident light.

[0039] In some embodiments, the light-shielding layer 120 is annular, and there is a first gap between the sidewall of the second through-hole 131 and the inner wall of the light-shielding layer 120, and a second gap 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 away from the protective layer 110. In other words, 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 block the edge of the second through-hole 131 of the adhesive layer 130. Even at a certain tilted viewing angle, the edge structure of the second through-hole 131 on the adhesive layer 130 will not be directly seen, thereby improving imaging and display quality.

[0040] The first spacing is greater than or equal to 50 micrometers, and the second spacing is greater than or equal to 50 micrometers. If the first spacing and / or the second spacing 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 actual manufacturing, the first spacing and the second spacing can be set to 50 micrometers, 100 micrometers, 200 micrometers, 300 micrometers, 400 micrometers, or 500 micrometers, etc., respectively. The specific values ​​can be selected and adjusted according to actual design requirements, and no special restrictions are imposed here.

[0041] Correspondingly, the width of the light-shielding layer 120 (the difference between the inner and outer diameters of the light-shielding layer 120, i.e., the distance between the inner and outer walls of the light-shielding layer 120) can be set to be greater than or equal to 100 micrometers and less than or equal to 1000 micrometers. If the width of the light-shielding layer 120 is too large, it will affect the area ratio of the displayed image 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, it will cause the light-shielding layer 120 to be unable to effectively block the edge structure of the second through hole 131, affecting the imaging and display quality. In the actual manufacturing process, the width of the light-shielding layer 120 can be set to 100 micrometers, 200 micrometers, 400 micrometers, 600 micrometers, 800 micrometers, or 1000 micrometers, etc., and its specific value can be selected and adjusted according to the actual design requirements. No special restrictions are imposed here.

[0042] It should be noted that when the adhesive layer 130 is placed on the side of the light-shielding layer 120 away from the protective layer 110, the adhesive layer 130 can be formed first, and a second through-hole 131 can be opened on the adhesive layer 130. Then, the adhesive layer 130 can be bonded to the protective layer 110 with the light-shielding layer 120 printed on it. Alternatively, a circular blocking area can be set on the protective layer 110 with the light-shielding layer 120 printed on it, and then an adhesive layer 130 with the second through-hole 131 can be formed by coating outside the blocking area. The specific manufacturing method can be selected and adjusted according to the actual process requirements, and no special restrictions are imposed here.

[0043] In other embodiments, such as Figure 2 As shown, a third through hole 141 is provided on the cover plate body 140 at the 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 avoid the formation of an air gap between the cover plate body 140 and the protective layer 110 after the cover plate body 140 is attached to the adhesive layer 130, thereby avoiding adverse effects on the imaging of the imaging area S1. The orthographic projection of the sidewall 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 sidewall of the third through hole 141 is recessed relative to the sidewall 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 plate body 140, thereby improving the imaging and display quality.

[0044] In some other embodiments, the orthographic projection of the sidewall of the third through hole 141 onto the protective layer 110 is located within the orthographic projection of the adhesive layer 130 onto 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 ensures that the edge structure of the third through hole 141 on the cover plate body 140 will not be directly seen even at a certain tilt angle of view, thereby improving imaging and display quality.

[0045] The third through-hole 141 has a third gap between its sidewall and the sidewall of the second through-hole 131. This third gap is greater than or equal to 50 micrometers and less than or equal to 250 micrometers. If the third gap is too small, the inner wall of the light-shielding layer 120 may not be able to effectively shield the edge structure of the third through-hole 141 on the cover plate body 140 at a certain tilted viewing angle, thus affecting imaging and display quality. If the third gap is too large, and only a light-transmitting adhesive layer 130 is provided between the protective layer 110 and the cover plate body 140, the outer wall of the light-shielding layer 120 may also not be able to effectively shield the edge structure of the third through-hole 141 on the cover plate body 140 at a certain tilted viewing angle, thus affecting imaging and display quality.

[0046] In actual production, the third spacing can be set to 50 micrometers, 100 micrometers, 150 micrometers, 200 micrometers or 250 micrometers, etc. The specific value can be selected and adjusted according to the actual design requirements, and there are no special restrictions here.

[0047] It should be noted that when attaching the cover plate body 140 to the side of the adhesive layer 130 away from the protective layer 110, the cover plate body 140 needs to be designed with an opening to form a third through hole 141. A chemical etching process can be used for opening the hole. After opening, the third through hole 141 on the cover plate body 140 is aligned with the second through hole 131 on the adhesive layer 130 and attached to the adhesive layer 130. In this embodiment, by designing the sidewall of the third through hole 141 to be recessed relative to the sidewall of the second through hole 131, it is possible to avoid the sidewall of the third through hole 141 of the cover plate body 140 extending into the sidewall of the second through hole 131 of the adhesive layer 130 due to fitting errors during the attachment process. This would prevent the light-shielding layer 120 from effectively blocking the edge structure of the third through hole 141 on the cover plate body 140, thereby affecting imaging and display quality.

[0048] Optional, such as Figure 3 As shown, the composite cover plate 100 also includes a filling layer 150, which is disposed in the first through hole 121. The 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 on the second surface 112 of the protective layer 110 corresponding to the positions of the camera area S1 and the light-shielding area S2. The adhesive layer 130 directly covers the light-shielding layer 120, the filling layer 150 and the protective layer 110, so that the cover plate body 140 is bonded to the adhesive layer 130 on the whole surface. This is beneficial to improving the bonding stability of the cover plate body 140, thereby improving the overall structural stability of the composite cover plate 100.

[0049] 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, when the filling layer 150 fills into the first through hole 121, the side of the filling layer 150 away from the protective layer 110 is flush with the side of the light-shielding layer 120 away from the protective layer 110. This allows the cover plate body 140 to adhere to the adhesive layer 130, and the light-shielding layer 120 and the filling layer 150 simultaneously compress the protective layer under the action of the cover plate body 140. 110, 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 a direction away from the cover plate body 140, so that the incident light entering the camera area S1 will not produce 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 plate 100 is attached to the display module 200.

[0050] In some embodiments, the filling layer 150 fills the first through hole 121 while covering the side of the light-shielding layer 120 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 light-shielding layer 120 with the filling layer 150, it is possible to prevent the thickness of the filling layer 150 from 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. This further ensures the uniformity of the thickness of the protrusion 113 formed by the position of the light-shielding area S2 and the imaging area S1 on the protective layer 110 protruding in a direction away from the cover plate body 140. As a result, the incident light entering the imaging area S1 will not produce an optical path difference or diverge when passing through the protective layer 110 and the filling layer 150, thereby preventing optical path distortion of the incident light and improving the imaging quality of the imaging area S1 after the composite cover plate 100 is attached to the display module 200.

[0051] In the direction from the first surface 111 to the second surface 112, the thickness of the filling layer 150 can be set to be greater than or equal to 0.5 micrometers and less than or equal to 20 micrometers. If the thickness of the filling layer 150 is too small, it may be impossible to ensure that the filling layer 150 is flush with the light-shielding layer 120 during the manufacturing process due to the influence of manufacturing precision; if the thickness of the filling layer 150 is too large, it will result in the overall thickness of the composite cover plate 100 being too large, which is not conducive to the thin and light design of the display device 10, and will also reduce the utilization rate of incident light after passing through the protective layer 110 and the filling layer 150 in sequence, thereby affecting the imaging effect.

[0052] In the actual manufacturing process, the thickness of the filler layer 150 can be set to 0.5 micrometers, 1 micrometer, 2 micrometers, 5 micrometers, 10 micrometers, 15 micrometers or 20 micrometers, etc. The specific thickness value can be selected and adjusted according to the actual design requirements, and there are no special restrictions here.

[0053] 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 micrometers and less than or equal to 5 micrometers. If the thickness of the light-shielding layer 120 is too small, the light-shielding layer 120 will have a poor shielding effect on the edge structure of the underlying film layer, affecting the imaging and display quality; if the thickness of the light-shielding layer 120 is too large, the overall thickness of the composite cover plate 100 will be too large, which is not conducive to the thin and light design of the display device 10, and will also result in the thickness of the filling layer 150 being 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, thus affecting the imaging effect.

[0054] In the actual manufacturing process, the thickness of the light-shielding layer 120 can be set to 0.5 micrometers, 1 micrometer, 2 micrometers, 3 micrometers, 4 micrometers or 5 micrometers, etc. The specific thickness value can be selected and adjusted according to the actual design requirements, and there are no special restrictions here.

[0055] It should be noted that the filler layer 150 is translucent, and its material can be a transparent ester material that can be photocured or thermocured, so that incident light passes through the protective layer 110 and the filler layer 150 in sequence before entering the camera hole 260 of the display module 200 to form an image. When manufacturing the filler layer 150, it can be formed by first applying a liquid coating and then curing it, or by directly attaching the filler material. The specific formation method can be selected and adjusted according to the actual manufacturing process, and no special restrictions are imposed here.

[0056] Secondly, this application embodiment also provides a display device, which includes a composite cover plate. The specific structure of the composite cover plate is as described in the above embodiments. Since this display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0057] like Figure 4 and Figure 5As shown, 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, i.e., the composite cover plate 100 is located on the light-emitting side of the display module 200 to protect the display module 200. The display module 200 has a camera hole 260, which houses optical elements such as a camera 270 for taking photos or videos. The display module 200 includes a support layer 210, a buffer layer 220, a back plate 230, a display panel 240, and a polarizer 250, all stacked together. The composite cover plate 100 is attached to the polarizer 250 of the display module 200 using an optical adhesive layer.

[0058] 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 incident light can enter the camera hole 260 through the camera area S1. 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, so as to prevent the human eye from directly observing the edge structure of the camera hole 260, which would affect 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.

[0059] 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 arranged sequentially. The protective layer 110 has a first surface 111 and a second surface 112 arranged opposite to each other. The light-shielding layer 120 is disposed on the second surface 112 and is located in the light-shielding area S2. The light-shielding layer 120 has a first through hole 121 formed at the position corresponding to the camera area S1. The side of the cover plate body 140 away from the adhesive layer 130 is used to attach to the display module 200. The area of ​​the protective layer 110 corresponding to the light-shielding layer 120 protrudes along the second surface 112 toward the first surface 111 and forms a protrusion 113. The part of the protrusion 113 corresponding to the camera area S1 has the same thickness everywhere in the direction from the first surface 111 toward the second surface 112. This 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 having an optical path difference or diverging 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 plate 100 is attached to the display module 200.

[0060] The composite cover plate and display device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A composite cover plate, characterized in that, The composite cover plate is used to be attached to the display module. The composite cover plate includes a camera area, a light-shielding area that at least partially surrounds the camera area, and a light-transmitting area that at least partially surrounds the light-shielding area. The composite cover plate also includes: A protective layer has a first surface and a second surface disposed opposite to each other, wherein the first surface is located on the side of the second surface opposite to the display module; A light-shielding layer is disposed on the second surface, the light-shielding layer is located in the light-shielding area, and a first through hole is formed in the light-shielding layer corresponding to the position of the camera area; An adhesive layer is disposed on the side of the light-shielding layer opposite to the protective layer; The cover plate body is disposed on the 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 adhere to the display module; The protective layer protrudes from the area enclosed by the light-shielding layer along the direction from the second surface toward the first surface, forming a protrusion. The portion of the protrusion corresponding to the camera area has the same thickness everywhere in the direction from the first surface toward the second surface. The protrusion is formed by the cover plate body pressing the area where the light-shielding layer is located through the adhesive layer.

2. The composite cover plate according to claim 1, characterized in that, A second through hole is provided on the adhesive layer at the position corresponding to the first through hole, and the orthographic projection of the sidewall 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, characterized in that, The light-shielding layer is annular, and there is a first gap between the sidewall of the second through hole and the inner wall of the light-shielding layer, and a second gap between the sidewall of the second through hole and the outer wall of the light-shielding layer; the first gap is greater than or equal to 50 micrometers; the second gap is greater than or equal to 50 micrometers.

4. The composite cover plate according to claim 2, characterized in that, A third through hole is provided on the cover plate body at the position corresponding to the second through hole, and the orthographic projection of the sidewall of the third through hole on the protective layer is located within the orthographic projection of the light-shielding layer on the protective layer.

5. The composite cover plate according to claim 4, characterized in that, The orthographic projection of the sidewall of the third through hole onto the protective layer lies within the orthographic projection of the adhesive layer onto the protective layer.

6. The composite cover plate according to claim 5, characterized in that, The sidewall of the third through hole has a third distance from 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.

7. The composite cover plate according to claim 1, characterized in that, The composite cover plate further includes a filling layer that fills 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.

8. The composite cover plate according to claim 1, characterized in that, The composite cover plate further includes a filler layer that fills the first through hole and covers the side of the light-shielding layer opposite to the protective layer, and the adhesive layer covers the filler layer.

9. The composite cover plate according to claim 7 or 8, characterized in that, In the 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.

10. A display device, characterized in that, The display device includes a display module and a composite cover plate according to any one of claims 1 to 9, wherein the composite cover plate is attached to the light-emitting surface of the display module.

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