Composite cover plate and display device

Abstract

A composite cover plate and a display device, the composite cover plate having a viewable area and a peripheral area located at least one side of the viewable area, and comprising a plastic substrate, a decorative layer, a support layer, and a shielding layer. The plastic substrate has a haze in a range of 10% to 30%, and has a thickness in a range of 50 µm to 250 µm. The decorative layer is attached to a surface of the plastic substrate, has a thickness in a range of 16 µm to 24 µm, and has an optical density in a range of 1.5 to 2.5. The peripheral area of the composite cover plate is defined by a vertical projection of the decorative layer. The support layer has an upper surface and a lower surface. The upper surface is bonded to the plastic substrate and the decorative layer. The shielding layer is attached to the lower surface, and has an optical density in a range of 5.0 to 6.2. L* of the CIELAB color space of the peripheral area of the composite cover plate is in a range of 90 to 96 as measured through the plastic substrate. By this, the decorative layer can achieve sufficient decorative effect, and the peripheral area of the composite cover plate can achieve sufficient brightness.

Description

[0001] This application is a divisional application of the patent application filed on June 14, 2023, with application number 202310705746.1 and entitled "Composite Cover Plate and Display Device". Technical Field

[0002] This disclosure relates to a composite cover plate and a display device. Background Technology

[0003] With the recent surge in popularity of smartphones and tablets, the demand for touch panels in these handheld electronic devices has exceeded supply, prompting the industry to continuously research and improve related technologies to reduce production costs and increase capacity. Generally, touch panels require a reinforced protective cover to protect the underlying touch sensors from scratches, fingerprints, and dirt. Furthermore, since the protective glass is specifically used for touch and display functions in handheld electronic devices, it must also be thin, pressure-resistant, drop-resistant, and have high light transmittance.

[0004] For conventional cover plates, to achieve sufficient brightness and shielding in the surrounding area, the thickness of the decorative layer needs to be increased. However, an excessively thick decorative layer not only prevents conventional cover plates from being made thinner, but may also cause warping problems in the surrounding area.

[0005] Therefore, how to propose a composite cover plate and display device that can solve the above problems is one of the issues that the industry is currently eager to invest research and development resources to address. Summary of the Invention

[0006] In view of this, one objective of this disclosure is to provide a composite cover plate and display device that can solve the above-mentioned problems.

[0007] To achieve the above objectives, according to one embodiment of this disclosure, a composite cover plate has a visible area and a peripheral area located on at least one side of the visible area, and includes an anti-glare film, a decorative layer, a support layer, and a shielding layer. The anti-glare film has a haze in the range of 10% to 30% and a thickness in the range of 50 µm to 250 µm. The decorative layer is attached to a surface of the anti-glare film. The decorative layer has a thickness in the range of 16 µm to 24 µm and an optical density (OD) in the range of 1.5 to 2.5. The peripheral area of ​​the composite cover plate is defined by the vertical projection of the decorative layer. The support layer has an upper layer and a lower layer. The upper layer is bonded to the anti-glare film and the decorative layer. The shielding layer is attached to the lower layer. The shielding layer has an optical density in the range of 5.0 to 6.2. The L* of the CIELAB color space of the peripheral area of ​​the composite cover plate, measured via the anti-glare film, is in the range of 90 to 96.

[0008] In one or more embodiments disclosed herein, the peripheral region has a gloss level in the range of 30 GU to 75 GU.

[0009] In one or more embodiments disclosed herein, the anti-glare film has a pencil hardness in the range of 3H to 6H.

[0010] In one or more embodiments disclosed herein, the shielding layer has a thickness ranging from 6 µm to 20 µm, preferably from 8 µm to 12 µm.

[0011] To achieve the above objectives, according to one embodiment of this disclosure, a display device includes a composite cover plate and a display module. The composite cover plate has a visible area and a peripheral area located on at least one side of the visible area, and includes an anti-glare film, a decorative layer, a support layer, and a shielding layer. The anti-glare film has a haze in the range of 10% to 30% and a thickness in the range of 50 µm to 250 µm. The decorative layer is attached to a surface of the anti-glare film. The decorative layer has a thickness in the range of 16 µm to 24 µm and an optical density in the range of 1.5 to 2.5. The peripheral area of ​​the composite cover plate is defined by the vertical projection of the decorative layer. The support layer has an upper layer and a lower layer. The upper layer is bonded to the anti-glare film and the decorative layer. The shielding layer is attached to the lower layer and has an optical density in the range of 5.0 to 6.2. The display module is disposed on the side of the support layer away from the anti-glare film. The L* of the CIELAB color space of the peripheral area of ​​the composite cover plate, measured via the anti-glare film, is in the range of 90 to 96.

[0012] In one or more embodiments disclosed herein, the peripheral area has a gloss level in the range of 30 GU to 75 GU.

[0013] In one or more embodiments disclosed herein, the anti-glare film has a pencil hardness in the range of 3H to 6H.

[0014] In one or more embodiments disclosed herein, the shielding layer has a thickness ranging from 6 µm to 20 µm, preferably from 8 µm to 12 µm.

[0015] In one or more embodiments disclosed herein, the display module is a reflective display, such as an electronic ink display or a cholesteric liquid crystal display.

[0016] In one or more embodiments disclosed herein, the display device further includes a touch module. The touch module is disposed between the composite cover and the display module.

[0017] In summary, in the composite cover plate and display device disclosed herein, by limiting the thickness and optical density of the decorative layer, sufficient decorative effect can be achieved. Furthermore, by further limiting the haze and thickness of the plastic substrate, sufficient brightness can be achieved in the peripheral area of ​​the composite cover plate. Additionally, by separating the decorative layer and the shielding layer, the total thickness of the composite cover plate can be effectively reduced, thereby effectively preventing warping problems in the peripheral area of ​​the composite cover plate.

[0018] The above description is only used to illustrate the problem to be solved by this disclosure, the technical means to solve the problem, and the effects produced, etc. The specific details of this disclosure will be described in detail in the following implementation method and related drawings. Attached Figure Description

[0019] To make the above and other objects, features, advantages and embodiments disclosed herein more apparent and understandable, the accompanying drawings are described below:

[0020] Figure 1 A schematic diagram illustrating a display device according to an embodiment of this disclosure;

[0021] Figure 2A For illustration Figure 1 A partially enlarged schematic diagram of the display device in the image;

[0022] Figure 2B For illustration Figure 1 Another enlarged schematic diagram of a portion of the display device;

[0023] Figure 3 A schematic diagram illustrating a display device according to another embodiment of this disclosure;

[0024] Figure 4 A schematic diagram illustrating a display device according to another embodiment of this disclosure;

[0025] Figure 5 For illustration Figure 4 Another schematic diagram of the front light guide module in the middle;

[0026] Figure 6 A schematic diagram illustrating a display device according to another embodiment of this disclosure;

[0027] Figure 7 This is a partial schematic diagram illustrating a composite cover plate according to another embodiment of the present disclosure.

[0028] [Symbol Explanation]

[0029] 100, 200, 300, 400: Display devices

[0030] 110,510: Composite cover plate

[0031] 111: Plastic substrate

[0032] 112: Decorative layer

[0033] 113: Support layer

[0034] 113a: Upper layer

[0035] 1131: Upper Level

[0036] 113b: Lower layer

[0037] 1132: Lower Level

[0038] 114: Shielding layer

[0039] 120: Display Module

[0040] 130a, 130b, 130c, 130d, 130e: Adhesive

[0041] 140: Touch module

[0042] 150: Front light guide module

[0043] 151: Light guide plate

[0044] 152: Circuit Board

[0045] 153: Light Source

[0046] 154: Tape

[0047] 511: Filler layer

[0048] 512: Anti-glare coating

[0049] A1, A2: Areas

[0050] VA: Visible Area

[0051] PA: Surrounding Area Detailed Implementation

[0052] The following describes several embodiments of this disclosure with reference to the accompanying drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this disclosure. That is, in some embodiments of this disclosure, these practical details are not essential. Furthermore, for the sake of simplicity in the drawings, some conventional structures and elements will be shown in a simple schematic manner.

[0053] Please refer to Figure 1 . Figure 1 A schematic diagram illustrating a display device 100 according to an embodiment of this disclosure is provided. Figure 1As shown, the display device 100 includes a composite cover plate 110 and a display module 120. The composite cover plate 110 includes a plastic substrate 111, a decorative layer 112, a support layer 113, and a shielding layer 114. The plastic substrate 111 has a haze in the range of 10% to 30%. The plastic substrate 111 has a thickness in the range of 50 µm to 250 µm. For example, the thickness of the plastic substrate 111 is about 75 µm, but this disclosure is not limited thereto.

[0054] In some embodiments, the plastic substrate 111 is an anti-glare (AG) film. AG film is a transparent film used on displays or screens to reduce glare. Glare is caused by reflected light from the screen surface, which can cause headaches, eye fatigue, and reduced work efficiency. AG film is achieved by frosting a hardened transparent film, blurring reflections (light scattering) to achieve an anti-glare effect.

[0055] In some embodiments, the plastic substrate 111 has a pencil hardness in the range of 3H to 6H, but this disclosure is not limited thereto.

[0056] Please refer to Table 1 below. The applicant provides a composite cover plate 110 for actual testing and obtains multiple optical measurement parameters of this composite cover plate 110.

[0057] Table 1

[0058]

[0059] It should be noted that ASTM D1003 in Table 1 above is a standard test method developed by the American Society for Testing and Materials (ASTM). This test method can be used to measure the light transmittance, haze, and gloss of transparent plastics (e.g., composite cover plate 110).

[0060] In some embodiments, the decorative layer 112 is a white ink layer, but this disclosure is not limited thereto. In this way, when a user views the composite cover 110 from the side of the plastic substrate 111, the white ink layer can present a white effect to the user.

[0061] In some embodiments, the decorative layer 112 may be formed on the lower surface of the plastic substrate 111 by a printing process. Please refer to... Figure 2A It is a drawing Figure 1 A partially enlarged schematic diagram of region A1 of the display device 100. (See attached diagram.) Figure 2AAs shown, decorative layer 112 is, for example, a plurality of ink layers stacked sequentially by a printing process. For example, the number of ink layers in decorative layer 112 is four, and the thickness of each ink layer in decorative layer 112 is in the range of 4 µm to 6 µm, but this disclosure is not limited thereto.

[0062] In practical applications, the number of ink layers in the decorative layer 112 and the thickness of each ink layer can be flexibly adjusted according to actual needs or process limitations.

[0063] like Figure 1 As shown, decorative layer 112 is attached to the lower surface of plastic substrate 111. Decorative layer 112 has an optical density (OD) in the range of 1.5 to 2.5. Decorative layer 112 has a thickness in the range of 16 µm to 24 µm.

[0064] By limiting the thickness and optical density of the decorative layer 112, a sufficient decorative effect can be achieved. For example, under the aforementioned optical density conditions, if the thickness of the decorative layer 112 produced by the printing process is less than 16µm, the decorative layer 112 may have pinhole problems and appear insufficiently white. Furthermore, a decorative layer 112 with a thickness greater than 24µm cannot significantly improve the whiteness of the decorative layer 112; instead, it affects the overall light transmittance of the composite cover plate 110.

[0065] Furthermore, by further limiting the haze (i.e., within the range of 10% to 30%) and thickness (i.e., within the range of 50 µm to 250 µm) of the plastic substrate 111, sufficient brightness can be achieved in the peripheral area PA of the composite cover plate 110. For example, the L* of the CIELAB color space measured via the plastic substrate 111 can be in the range of 90 to 96. L* represents the perceived brightness. The CIELAB color space also includes a* and b*, representing the four distinct colors of human vision: red, green, blue, and yellow.

[0066] In some embodiments, the peripheral area PA of the composite cover plate 110 has a gloss level in the range of 30 GU to 75 GU, but this disclosure is not limited thereto.

[0067] In some embodiments, each ink layer of the decorative layer 112 extends from the edge of the plastic substrate 111 toward the visible area VA.

[0068] In some embodiments, the decorative layer 112 extends from the edge of the plastic substrate 111 toward the visible area VA by a distance in the range of 7 mm to 9 mm, but this disclosure is not limited thereto.

[0069] In some implementations, such as Figure 2A As shown, the next ink layer of decorative layer 112 has an indentation distance of approximately 0.05 mm to 0.25 mm from the visible area VA compared to the previous ink layer, but this disclosure is not limited to this. The aforementioned indentation distance is used to provide process tolerances for the printing process to avoid the problem of the boundary of decorative layer 112 not being accurately positioned.

[0070] like Figure 1 As shown, the support layer 113 is bonded to the plastic substrate 111 and the decorative layer 112 (e.g., by adhesive 130a). The support layer 113 is used to increase the overall structural strength of the plastic substrate 111.

[0071] In some embodiments, the support layer 113 may be made of two materials, for example, having an upper layer 113a and a lower layer 113b. For example, one of the upper layer 113a and the lower layer 113b may be made of polycarbonate (PC), and the other of the upper layer 113a and the lower layer 113b may be made of acrylic (PMMA), but this disclosure is not limited thereto.

[0072] In some embodiments, the material of the support layer 113 includes glass, but this disclosure is not limited thereto.

[0073] In some embodiments, adhesive 130a is, for example, a transparent optical adhesive (OCA), but this disclosure is not limited thereto.

[0074] like Figure 1 As shown, the shielding layer 114 is attached to the lower layer 1132 of the support layer 113. The shielding layer 114 has an optical density in the range of 5.0 to 6.2. The peripheral area PA of the composite cover plate 110 is defined by the vertical projection of the decorative layer 112. The composite cover plate 110 also has a visible area VA connected to the peripheral area PA. In other words, the visible area VA can be defined as the portion of the composite cover plate 110 that does not overlap with the vertical projection of the decorative layer 112.

[0075] As previously described, the decorative layer 112 is formed on the lower surface of the plastic substrate 111, while the shielding layer 114 is attached to the lower surface 1132 of the support layer 113. In other words, the decorative layer 112 and the shielding layer 114 are separated by at least the support layer 113. By separating the decorative layer 112 and the shielding layer 114, the total thickness of the composite cover plate 110 can be effectively reduced (because the thickness of the adhesive 130a can be thinner), thereby effectively preventing warping of the peripheral area PA of the composite cover plate 110.

[0076] In some embodiments, the shielding layer 114 is a black ink layer, but this disclosure is not limited thereto. Thereby, when a user views the composite cover 110 from the side of the plastic substrate 111, the black ink layer can be used to shield the traces of the display module 120 located in the peripheral area PA. Furthermore, the shielding layer 114 also has the function of preventing light leakage.

[0077] In some embodiments, the shielding layer 114 has a thickness ranging from 6 µm to 20 µm, preferably from 8 µm to 12 µm, but this disclosure is not limited thereto.

[0078] In some embodiments, the shielding layer 114 may be formed on the lower layer 1132 of the support layer 113 by a printing process. Please refer to Figure 2B It is a drawing Figure 1 A partially enlarged schematic diagram of region A2 of the display device 100. (See attached diagram.) Figure 2B As shown, the masking layer 114 is, for example, a plurality of ink layers stacked sequentially by a printing process. For example, the masking layer 114 has three ink layers, and the thickness of each ink layer of the masking layer 114 is in the range of 4 µm to 6 µm, but this disclosure is not limited thereto.

[0079] In practical applications, the number of ink layers in the masking layer 114 and the thickness of each ink layer can be flexibly adjusted according to actual needs or process limitations.

[0080] In some embodiments, each ink layer of the masking layer 114 extends from the edge of the support layer 113 toward the visible area VA.

[0081] like Figure 1 As shown, the shielding layer 114 extends from the edge of the support layer 113 toward the visible area VA by a distance less than the decorative layer 112 extends from the edge of the plastic substrate 111 toward the visible area VA (i.e., the shielding layer 114 is recessed compared to the decorative layer 112). Therefore, when a user views the composite cover 110 from the side of the plastic substrate 111, they will only see the white decorative layer 112 and not the black shielding layer 114. For example, the shielding layer 114 extends from the edge of the support layer 113 toward the visible area VA by less than 7 mm, but this disclosure is not limited to this.

[0082] In some implementations, such as Figure 2B As shown, the next ink layer of the masking layer 114 has an inward distance of approximately 0.05 mm to 0.25 mm from the visible area VA compared to the previous ink layer, but this disclosure is not limited to this. The aforementioned inward distance is used to provide process tolerances for the printing process to avoid the problem of the boundary of the masking layer 114 not being accurately positioned.

[0083] In some implementations, such as Figure 1 As shown, the shielding layer 114 extends from the lower layer 1132 of the support layer 113 to the side of the support layer 113, the adhesive 130a, the decorative layer 112 and the plastic substrate 111.

[0084] like Figure 1 As shown, the display module 120 is disposed on the side of the support layer 113 away from the plastic substrate 111. For example, the display module 120 is bonded to the lower layer 1132 of the support layer 113 by adhesive 130b.

[0085] In some embodiments, adhesive 130b is, for example, a transparent optical adhesive, but this disclosure is not limited thereto.

[0086] Please refer to Table 2 below. The applicant conducted actual tests on a composite cover plate 110 and obtained multiple optical measurement parameters of this composite cover plate 110. The tests were conducted by measuring different positions of the peripheral region PA via a plastic substrate 111.

[0087] Table 2

[0088]

[0089] In some embodiments, the display module 120 is a reflective display, such as an electronic ink display or a cholesteric liquid crystal display, but this disclosure is not limited thereto.

[0090] Please refer to Figure 3 This is a schematic diagram illustrating a display device 200 according to another embodiment of this disclosure. Figure 3 As shown, the display device 200 includes a composite cover plate 110, a display module 120, and a touch module 140, wherein the composite cover plate 110 and the display module 120 are the same as... Figure 1 The embodiments shown are described above, and therefore the descriptions of these components can be found in the foregoing related descriptions, and will not be repeated here. Compared to Figure 1 In the embodiment shown, the display device 100 of this embodiment additionally includes a touch module 140. The touch module 140 is disposed between the composite cover plate 110 and the display module 120. Specifically, the touch module 140 is bonded to the lower surface 1132 of the support layer 113 using adhesive 130b, and to the upper surface of the display module 120 using adhesive 130c. Thus, the display device 200 of this embodiment can provide user touch functionality.

[0091] In some embodiments, the touch module 140 is a GFF (Glass-Film-Film) type touch module 140, but this disclosure is not limited thereto. In practical applications, the touch module 140 may also be a GF (Glass Film) type touch module 140, a GF2 (Glass-Film-Double side) type touch module 140, an OGS-SITO (One Glass Solutions-sided ITO) type touch module 140, or other types of touch modules 140.

[0092] Please refer to Figure 4 This is a schematic diagram illustrating a display device 300 according to another embodiment of this disclosure. Figure 4 As shown, the display device 300 includes a composite cover plate 110, a front light guide module 150, and a display module 120, wherein the composite cover plate 110 and the display module 120 are identical to... Figure 1 The embodiments shown are described above, and therefore the descriptions of these components can be found in the foregoing related descriptions, and will not be repeated here. Compared to Figure 1 In the illustrated embodiment, the display device 300 of this embodiment additionally includes a front light guide module 150. Specifically, the front light guide module 150 is bonded to the lower surface 1132 of the support layer 113 using adhesive 130b, and to the upper surface of the display module 120 using adhesive 130c. The front light guide module 150 is configured to guide light to the display module 120, where it is then reflected back out. The front light guide module 150 can be used in low-light environments. The soft front light design illuminates only the reading surface, allowing users to read without disturbing others. For example, when the front light guide module 150 is on, the luminance of the visible area VA of the display device 300, measured via the plastic substrate 111, is in the range of 100 nits to 140 nits.

[0093] Please refer to Figure 5 It is a drawing Figure 4 Another schematic diagram of the front light guide module 150. (See diagram below.) Figure 5 As shown, the front light guide module 150 includes a light guide plate 151, a circuit board 152, a light source 153, and adhesive tape 154. The upper surface of the light guide plate 151 is bonded to the lower surface 1132 of the support layer 113 using adhesive tape 130b. The lower surface of the light guide plate 151 is bonded to the upper surface of the display module 120 using adhesive tape 130c. The circuit board 152 is bonded to the lower surface of the light guide plate 151 using adhesive tape 130e. The light source 153 is disposed on the circuit board 152 and configured to emit light toward the side of the light guide plate 151. Adhesive tape 154 is bonded to the upper surface of the light guide plate 151 and the upper surface of the light source 153.

[0094] In some embodiments, the light source 153 is a light-emitting diode (LED), but this disclosure is not limited thereto.

[0095] In some embodiments, the tape 154 is white, but this disclosure is not limited thereto.

[0096] Please refer to Figure 6 This is a schematic diagram illustrating a display device 400 according to another embodiment of this disclosure. Figure 6 As shown, the display device 400 includes a composite cover plate 110, a touch module 140, a front light guide module 150, and a display module 120, wherein the composite cover plate 110, the display module 120, and the touch module 140 are identical to... Figure 3 The embodiments shown are described above, and therefore the descriptions of these components can be found in the foregoing related descriptions, and will not be repeated here. Compared to Figure 3 In the embodiment shown, the display device 400 of this embodiment additionally includes a front light guide module 150. Specifically, the front light guide module 150 is bonded to the lower surface of the touch module 140 using adhesive 130c, and to the upper surface of the display module 120 using adhesive 130d.

[0097] Please refer to Figure 7 This is a partial schematic diagram illustrating a composite cover plate 510 according to another embodiment of this disclosure. Figure 7 As shown, the composite cover plate 510 includes a filler layer 511, an anti-glare coating 512, a decorative layer 112, a support layer 113, and a shielding layer 114, wherein the decorative layer 112, the support layer 113, and the shielding layer 114 are the same as... Figure 1 The embodiments shown are described above, and therefore the descriptions of these components can be found in the foregoing related descriptions, and will not be repeated here. Compared to Figure 1In the embodiment shown, the composite cover plate 510 of this embodiment uses a combination of a filler layer 511 and an anti-glare coating 512 instead of a combination of a plastic substrate 111 and an adhesive 130a. Specifically, in this embodiment, the decorative layer 112 is directly disposed on the upper surface 1131 of the support layer 113. When the support layer 113 is composed of two materials (i.e., including an upper layer 113a and a lower layer 113b), the decorative layer 112 can be disposed on the upper layer 113a. The filler layer 511 is attached to the upper layer 113a and the decorative layer 112. The filler layer 511 can fill the step difference at the junction of the upper layer 113a and the decorative layer 112, and the material properties of the filler layer 511 can optically match the upper layer 113a and the decorative layer 112. The anti-glare coating 512 is disposed on the side of the filler layer 511 away from the support layer 113, thus avoiding the problem of poor adhesion when the anti-glare coating 512 is directly applied to the upper layer 113a of the support layer 113 and the decorative layer 112. In addition, the decorative layer 112 and the shielding layer 114 are also separated by the support layer 113.

[0098] In some embodiments, the filler layer 511 comprises a thermosetting transparent material or a UV-curable transparent material, but this disclosure is not limited thereto.

[0099] It should be noted that, Figure 7 The advantages of the composite cover plate 510 shown include at least the following: (1) the decorative layer 112 is closer to the user and can present a better brightness value, so the distance between the measurement position and the decorative layer 112 can be shortened when measuring the optical quality of the decorative layer 112; (2) the decorative layer 112 is away from the light emitted by the front light guide module 150, thus reducing the edge glow of the visible area VA, and the distance between the finger contact position and the touch module 140 can also be shortened when using touch applications; and (3) the use of one plastic substrate 111 is reduced, but the original performance, such as haze, gloss and surface hardness, can still be maintained.

[0100] From the detailed description of the specific embodiments disclosed above, it is evident that in the composite cover plate and display device disclosed herein, by limiting the thickness and optical density of the decorative layer, sufficient decorative effect can be achieved. Furthermore, by further limiting the haze and thickness of the plastic substrate, sufficient brightness can be achieved in the peripheral area of ​​the composite cover plate. Additionally, by separating the decorative layer and the shielding layer, the total thickness of the composite cover plate can be effectively reduced, thereby effectively preventing warping problems in the peripheral area of ​​the composite cover plate.

[0101] Although the present disclosure has been described above with reference to embodiments, it is not intended to limit the present disclosure. Any person skilled in the art may make various modifications and refinements without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.

Claims

1. A composite cover plate having a viewing area and a peripheral area located on at least one side of the viewing area, characterized in that, The composite cover plate includes: An anti-glare film having a haze in the range of 10% to 30% and a thickness in the range of 50 µm to 250 µm; A decorative layer is attached to a surface of the anti-glare film, the decorative layer having a thickness in the range of 16 µm to 24 µm and an optical density in the range of 1.5 to 2.5, wherein the peripheral area of ​​the composite cover is defined by the vertical projection of the decorative layer; A support layer having an upper layer and a lower layer, the upper layer being bonded to the anti-glare film and the decorative layer; and A shielding layer is attached to the underlying layer, the shielding layer having an optical density in the range of 5.0 to 6.2; The L* value of the CIELAB color space of the peripheral area of ​​the composite cover, measured through the anti-glare film, is in the range of 90 to 96.

2. The composite cover plate as described in claim 1, characterized in that, The surrounding area has a gloss level in the range of 30 GU to 75 GU.

3. The composite cover plate as described in claim 1, characterized in that, The anti-glare film has a pencil hardness in the range of 3H to 6H.

4. The composite cover plate as described in claim 1, characterized in that, The shielding layer has a thickness ranging from 6 µm to 20 µm.

5. A display device, characterized in that, Include: A composite cover having a viewing area and a peripheral area located on at least one side of the viewing area, and comprising: An anti-glare film having a haze in the range of 10% to 30% and a thickness in the range of 50 µm to 250 µm; A decorative layer is attached to a surface of the anti-glare film, the decorative layer having a thickness in the range of 16 µm to 24 µm and an optical density in the range of 1.5 to 2.5, wherein the peripheral area of ​​the composite cover is defined by the vertical projection of the decorative layer; A support layer having an upper layer and a lower layer, the upper layer being bonded to the anti-glare film and the decorative layer; and A shielding layer, attached to the underlying layer, having an optical density in the range of 5.0 to 6.2; and A display module is located on the side of the support layer away from the anti-glare film. The L* value of the CIELAB color space of the peripheral area of ​​the composite cover, measured through the anti-glare film, is in the range of 90 to 96.

6. The display device as claimed in claim 5, characterized in that, The surrounding area has a gloss level in the range of 30 GU to 75 GU.

7. The display device as claimed in claim 5, characterized in that, The anti-glare film has a pencil hardness in the range of 3H to 6H.

8. The display device as claimed in claim 5, characterized in that, The shielding layer has a thickness ranging from 6 µm to 20 µm.

9. The display device as claimed in claim 5, characterized in that, The display module is either an electronic ink display or a cholesterol liquid crystal display.

10. The display device as claimed in claim 5, characterized in that, It further includes a touch module disposed between the composite cover and the display module.

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