Composite cover plate and display device

Abstract

A composite cover plate and a display device are provided, the composite cover plate has a visible area and a peripheral area located on at least one side of the visible area, and the composite cover plate comprises a plastic substrate, a decorative layer, a supporting layer and a shielding layer. The plastic substrate has a haze in the range of 10% to 30%, and has a thickness in the range of 50 [mu] m to 250 [mu] m. The decorative layer is attached to the surface of the plastic substrate, has a thickness in the range of 16 [mu] m to 24 [mu] m, and has 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 supporting layer is provided with an upper layer surface and a lower layer surface. The upper layer surface is bonded to the plastic substrate and the decorative layer. The masking layer is attached to the lower layer surface and has an optical density in the range of 5.0 to 6.2. The L * of the CIELAB color space of the peripheral region of the composite cover plate measured by the plastic substrate is in the range of 90 to 96. Therefore, the decorative layer can achieve a sufficient decorative effect, and the peripheral area of the composite cover plate can achieve sufficient brightness.

Description

Technical Field

[0001] The present disclosure relates to a composite cover plate and a display device. Background Art

[0002] With the recent boom in smartphones and tablets, the demand for touch panels in these handheld electronic devices has exceeded supply, prompting the industry to continuously develop and improve related process technologies in order to reduce production costs and provide higher production capacity. Generally speaking, a touch panel needs to be covered with a reinforced protective cover to protect the touch sensor underneath from scratches, fingerprints, and contamination. In addition, since the protective glass is especially used in the touch and display of handheld electronic devices, it must also be thin, pressure-resistant, drop-resistant, and highly transparent.

[0003] For conventional protective cover plates, if sufficient brightness and shielding effect are to be achieved in the peripheral area, the thickness of the decorative layer must be increased. However, too thick a decorative layer will not only make the conventional protective cover plate unable to be thinner, but may also cause the peripheral area to warp.

[0004] Therefore, how to propose a composite cover plate and a display device that can solve the above problems is one of the problems that the industry is eager to invest research and development resources to solve. Summary of the invention

[0005] In view of this, an object of the present disclosure is to provide a composite cover plate and a display device that can solve the above problems.

[0006] In order to achieve the above-mentioned object, according to one embodiment of the present 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 a plastic substrate, a decorative layer, a support layer and a shielding layer. The plastic substrate has a haze (Haze) in the range of 10% to 30%, and has a thickness in the range of 50μm to 250μm. The decorative layer is attached to a surface of the plastic substrate, has a thickness in the range of 16μm to 24μm, and has an optical density (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 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 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 through the plastic substrate is in the range of 90 to 96.

[0007] In one or more embodiments of the present disclosure, the peripheral region has a gloss ranging from 30 GU to 75 GU.

[0008] In one or more embodiments of the present disclosure, the plastic substrate has a pencil hardness ranging from 3H to 6H.

[0009] In one or more embodiments of the present disclosure, the shielding layer has a thickness in the range of 6 μm to 20 μm, preferably in the range of 8 μm to 12 μm.

[0010] In order to achieve the above-mentioned object, according to one embodiment of the present 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 a plastic substrate, a decorative layer, a support layer and a shielding layer. The plastic substrate has a haze in the range of 10% to 30%, and has a thickness in the range of 50μm to 250μm. The decorative layer is attached to a surface of the plastic substrate, has a thickness in the range of 16μm to 24μm, and has 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 plastic substrate 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 arranged on the side of the support layer away from the plastic substrate. The L* of the CIELAB color space of the peripheral area of ​​the composite cover plate measured through the plastic substrate is in the range of 90 to 96.

[0011] In one or more embodiments of the present disclosure, the peripheral region has a glossiness ranging from 30 GU to 75 GU.

[0012] In one or more embodiments of the present disclosure, the plastic substrate has a pencil hardness ranging from 3H to 6H.

[0013] In one or more embodiments of the present disclosure, the shielding layer has a thickness in the range of 6 μm to 20 μm, preferably in the range of 8 μm to 12 μm.

[0014] In one or more embodiments of the present disclosure, the display module is a reflective display, such as an electronic ink display or a cholesteric liquid crystal display.

[0015] In one or more embodiments of the present disclosure, the display device further includes a touch module. The touch module is disposed between the composite cover plate and the display module.

[0016] In order to achieve the above-mentioned purpose, according to one embodiment of the present disclosure, a display device includes a composite cover plate, a front light guide module and a display module. The composite cover plate includes a plastic substrate, a decorative layer, a support layer and a shielding layer. The plastic substrate has a haze in the range of 10% to 30% and a thickness in the range of 50μm to 250μm. The decorative layer is attached to a surface of the plastic substrate, has a thickness in the range of 16μm to 24μm, and has 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 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 the range of 5.0 to 6.2. The composite cover plate also has a visible area connected to the peripheral area. The front light guide module is arranged on the side of the support layer away from the plastic substrate. The display module is arranged on the side of the front light guide module away from the composite cover plate. When the display device is in a state where the front light guide module is turned on, the luminance of the visible area measured through the plastic substrate is in the range of 100 nits to 140 nits.

[0017] In one or more embodiments of the present disclosure, the L* of the CIELAB color space of the peripheral area of ​​the composite cover plate measured through the plastic substrate is in the range of 90 to 96.

[0018] In one or more embodiments of the present disclosure, the shielding layer has a thickness in the range of 6 μm to 20 μm, preferably in the range of 8 μm to 12 μm.

[0019] In one or more embodiments of the present disclosure, the display module is an electronic ink display or a cholesteric liquid crystal display.

[0020] In one or more embodiments of the present disclosure, the display device further includes a touch module. The touch module is disposed between the composite cover plate and the display module.

[0021] In summary, in the composite cover plate and display device disclosed herein, by limiting the thickness and optical density of the decorative layer, the decorative layer can achieve a sufficient decorative effect. Furthermore, by further limiting the haze and thickness of the plastic substrate, the peripheral area of ​​the composite cover plate can also achieve sufficient brightness. In addition, by separating the decorative layer from the shielding layer, the total thickness of the composite cover plate can be effectively reduced, thereby effectively avoiding the warping problem in the peripheral area of ​​the composite cover plate.

[0022] The above description is only used to illustrate the problem to be solved by the present disclosure, the technical means to solve the problem, and the effects produced, etc. The specific details of the present disclosure will be described in detail in the following implementation methods and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the above and other purposes, features, advantages and embodiments of the present disclosure more clearly understood, the attached drawings are described as follows:

[0024] Figure 1 A schematic diagram illustrating a display device according to an embodiment of the present disclosure;

[0025] Figure 2A To illustrate Figure 1 A partial enlarged schematic diagram of a display device in FIG.

[0026] Figure 2B To illustrate Figure 1 Another partial enlarged schematic diagram of the display device in;

[0027] Figure 3 is a schematic diagram illustrating a display device according to another embodiment of the present disclosure;

[0028] Figure 4 is a schematic diagram illustrating a display device according to another embodiment of the present disclosure;

[0029] Figure 5 To illustrate Figure 4 Another schematic diagram of the front light guide module in FIG.

[0030] Figure 6 is a schematic diagram illustrating a display device according to another embodiment of the present disclosure;

[0031] Figure 7 A partial schematic diagram of a composite cover plate according to another embodiment of the present disclosure is shown.

[0032]

Explanation of symbols

[0033] 100,200,300,400: Display device

[0034] 110,510: Composite cover

[0035] 111: Plastic substrate

[0036] 112:Decorative layer

[0037] 113: Support layer

[0038] 113a: Upper level

[0039] 1131: Upper level

[0040] 113b: Lower level

[0041] 1132: Lower level

[0042] 114: Shielding layer

[0043] 120: Display module

[0044] 130a, 130b, 130c, 130d, 130e: adhesive

[0045] 140: Touch module

[0046] 150: Front light guide module

[0047] 151: Light guide plate

[0048] 152: Circuit Board

[0049] 153: Light Source

[0050] 154: Tape

[0051] 511: Filling layer

[0052] 512: Anti-glare coating

[0053] A1, A2: Area

[0054] VA: Visual Area

[0055] PA: Peripheral area DETAILED DESCRIPTION

[0056] The following will disclose multiple embodiments of the present disclosure with the accompanying drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present disclosure. In other words, in some embodiments of the present disclosure, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and elements will be depicted in a simple schematic manner in the drawings.

[0057] Please refer to Figure 1 . Figure 1 FIG. 1 is a schematic diagram illustrating a display device 100 according to an embodiment of the present disclosure. Figure 1 As 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 the present disclosure is not limited thereto.

[0058] In some embodiments, the plastic substrate 111 is an anti-glare (AG) film. AG film is a transparent film that can reduce glare on a display or screen. Glare is caused by reflected light from the screen surface, which can cause headaches, eye fatigue and reduce work efficiency. AG film is a hardened transparent film that is atomized to blur the reflection (light scattering) to achieve an anti-glare effect.

[0059] In some embodiments, the plastic substrate 111 has a pencil hardness ranging from 3H to 6H, but the present disclosure is not limited thereto.

[0060] Please refer to Table 1 below. The applicant provides a composite cover plate 110 for actual testing and obtains multiple optical measurement parameters of the composite cover plate 110 .

[0061] Table 1

[0062]

[0063]

[0064] 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 glossiness of transparent plastics (eg, the composite cover plate 110).

[0065] In some embodiments, the decoration layer 112 is a white ink layer, but the present disclosure is not limited thereto. Thus, when a user views the composite cover plate 110 from one side of the plastic substrate 111 , the white ink layer can present a white effect to the user.

[0066] In some embodiments, the decoration layer 112 may be formed on the lower surface of the plastic substrate 111 by a printing process. Figure 2A , which is a drawing Figure 1 FIG. 1 is a partial enlarged schematic diagram of the area A1 of the display device 100. Figure 2A As shown, the decoration layer 112 is, for example, a plurality of ink layers stacked by sequential printing through a printing process. For example, the number of ink layers of the decoration layer 112 is four, and the thickness of each ink layer of the decoration layer 112 is in the range of 4 μm to 6 μm, but the disclosure is not limited thereto.

[0067] In practical applications, the number of ink layers of the decoration layer 112 and the thickness of each ink layer can be flexibly adjusted according to actual needs or process limitations.

[0068] like Figure 1As shown, the decoration layer 112 is attached to the lower surface of the plastic substrate 111. The decoration layer 112 has an optical density (OD) in the range of 1.5 to 2.5. The decoration layer 112 has a thickness in the range of 16 μm to 24 μm.

[0069] By limiting the thickness and optical density of the decorative layer 112, the decorative layer 112 can achieve a sufficient decorative effect. For example, under the aforementioned optical density condition, if the thickness of the decorative layer 112 produced by the printing process is less than 16 μm, the decorative layer 112 may have a pinhole problem and appear not white enough. In addition, a decorative layer 112 with a thickness greater than 24 μm can no longer significantly enhance the white effect presented by the decorative layer 112, but instead affects the overall light transmittance of the composite cover plate 110.

[0070] In addition, by further limiting the haze (i.e., in the range of 10% to 30%) and thickness (i.e., in the range of 50 μm to 250 μm) of the plastic substrate 111, the peripheral area PA of the composite cover plate 110 can also achieve sufficient brightness. For example, the L* of the CIELAB color space of the peripheral area PA measured through 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*, which represent the four unique colors of human vision: red, green, blue, and yellow.

[0071] In some embodiments, the peripheral area PA of the composite cover plate 110 has a gloss within a range of 30 GU to 75 GU, but the present disclosure is not limited thereto.

[0072] In some embodiments, each ink layer of the decoration layer 112 extends from the edge of the plastic substrate 111 toward the viewing area VA.

[0073] In some embodiments, the extension distance of the decoration layer 112 from the edge of the plastic substrate 111 toward the viewing area VA is in a range of 7 mm to 9 mm, but the present disclosure is not limited thereto.

[0074] In some embodiments, Figure 2A As shown, the next ink layer of the decoration layer 112 has a retraction distance of about 0.05mm to 0.25mm away from the visual area VA compared to the previous ink layer, but the present disclosure is not limited thereto. The retraction distance is used to provide a process tolerance for the printing process to avoid the problem that the boundary of the decoration layer 112 cannot be accurately positioned.

[0075] like Figure 1As shown, the support layer 113 is bonded to the plastic substrate 111 and the decoration layer 112 (eg, by adhesive 130 a ). The support layer 113 is used to increase the overall structural strength of the plastic substrate 111 .

[0076] In some embodiments, the support layer 113 may be composed of two materials, such as an upper layer 113a and a lower layer 113b. For example, the material of one of the upper layer 113a and the lower layer 113b includes polycarbonate (PC), and the material of the other of the upper layer 113a and the lower layer 113b includes polymethyl methacrylate (PMMA), but the present disclosure is not limited thereto.

[0077] In some embodiments, the material of the support layer 113 includes glass, but the present disclosure is not limited thereto.

[0078] In some embodiments, the adhesive 130 a is, for example, transparent optical adhesive (Optical Clear Adhesive, OCA), but the present disclosure is not limited thereto.

[0079] like Figure 1 As shown, the shielding layer 114 is attached to the lower surface 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 connecting 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.

[0080] As mentioned above, the decoration layer 112 is formed on the lower surface of the plastic substrate 111, and the shielding layer 114 is attached to the lower surface 1132 of the support layer 113. In other words, the decoration layer 112 and the shielding layer 114 are separated by at least the support layer 113. By separating the decoration 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 avoiding the warping problem of the peripheral area PA of the composite cover plate 110.

[0081] In some embodiments, the shielding layer 114 is a black ink layer, but the present disclosure is not limited thereto. Thus, when the user views the composite cover plate 110 from one side of the plastic substrate 111, the black ink layer can be used to shield the wiring of the display module 120 located in the peripheral area PA below. In addition, the shielding layer 114 also has the effect of preventing light leakage.

[0082] In some embodiments, the shielding layer 114 has a thickness in a range of 6 μm to 20 μm, preferably in a range of 8 μm to 12 μm, but the disclosure is not limited thereto.

[0083] In some embodiments, the shielding layer 114 can be formed on the lower surface 1132 of the support layer 113 by a printing process. Figure 2B , which is a drawing Figure 1 FIG. 1 is a partial enlarged schematic diagram of area A2 of the display device 100. Figure 2B As shown, the shielding layer 114 is, for example, a plurality of ink layers stacked by sequential printing through a printing process. For example, the number of ink layers of the shielding layer 114 is three, and the thickness of each ink layer of the shielding layer 114 is in the range of 4 μm to 6 μm, but the disclosure is not limited thereto.

[0084] In practical applications, the number of ink layers of the shielding layer 114 and the thickness of each ink layer can be flexibly adjusted according to actual needs or process limitations.

[0085] In some embodiments, each ink layer of the shielding layer 114 extends from the edge of the supporting layer 113 toward the viewing area VA.

[0086] like Figure 1 As shown, the extending distance of the shielding layer 114 from the edge of the supporting layer 113 toward the visible area VA is less than the extending distance of the decorative layer 112 from the edge of the plastic substrate 111 toward the visible area VA (that is, the shielding layer 114 is retracted relative to the decorative layer 112). Thus, when the user views the composite cover plate 110 from the side of the plastic substrate 111, only the decorative layer 112 presenting a white effect can be seen, and the shielding layer 114 presenting a black effect cannot be seen. For example, the extending distance of the shielding layer 114 from the edge of the supporting layer 113 toward the visible area VA is less than 7 mm, but the present disclosure is not limited thereto.

[0087] In some embodiments, Figure 2B As shown, the next ink layer of the shielding layer 114 has a retraction distance of about 0.05mm to 0.25mm away from the visual area VA compared to the previous ink layer, but the disclosure is not limited thereto. The retraction distance is used to provide a process tolerance for the printing process to avoid the problem that the boundary of the shielding layer 114 cannot be accurately positioned.

[0088] In some embodiments, Figure 1 As shown, the shielding layer 114 further extends from the lower surface 1132 of the support layer 113 to the side surfaces of the support layer 113 , the adhesive 130 a , the decoration layer 112 and the plastic substrate 111 .

[0089] like Figure 1As shown, the display module 120 is disposed on a side of the support layer 113 away from the plastic substrate 111. For example, the display module 120 is bonded to the lower surface 1132 of the support layer 113 by adhesive 130b.

[0090] In some embodiments, the adhesive 130 b is, for example, transparent optical adhesive, but the present disclosure is not limited thereto.

[0091] Please refer to Table 2 below, the applicant conducted an actual test on a composite cover plate 110 and obtained a plurality of optical measurement parameters of the composite cover plate 110. The test measured different positions of the peripheral area PA through the plastic substrate 111.

[0092] Table 2

[0093] Measuring point L* a* b* ΔE Glossiness OD 01 94.46 -1.15 0.23 1.10 47.80 6.78 02 94.56 -1.15 0.15 1.00 48.80 6.11 03 94.42 -1.17 0.06 1.14 47.80 5.76 04 94.43 -1.16 0.06 1.13 49.00 5.93 05 94.40 -1.19 0.04 1.17 48.70 6.04

[0094] In some embodiments, the display module 120 is a reflective display, such as an electronic ink display or a cholesteric liquid crystal display, but the present disclosure is not limited thereto.

[0095] Please refer to Figure 3 , which is a schematic diagram illustrating a display device 200 according to another embodiment of the present 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 Therefore, the description of these elements can refer to the above related descriptions and will not be repeated here. Figure 1 In the embodiment shown, the display device 100 of this embodiment is additionally provided with 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 by means of adhesive 130b, and is bonded to the upper surface of the display module 120 by means of adhesive 130c. Thus, the display device 200 of this embodiment can provide the user with a touch function.

[0096] In some embodiments, the touch module 140 is a GFF (Glass-Film-Film) type touch module 140, but the present 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 Solution single-sided ITO) type touch module 140, or other types of touch modules 140.

[0097] Please refer to Figure 4 , which is a schematic diagram illustrating a display device 300 according to another embodiment of the present 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 the same as Figure 1 Therefore, the description of these elements can refer to the above related descriptions and will not be repeated here. Figure 1 In the embodiment shown, the display device 300 of this embodiment additionally adds 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 by an adhesive 130b, and is bonded to the upper surface of the display module 120 by an adhesive 130c. The front light guide module 150 is configured to guide light to the display module 120, and then the light is reflected by the display module 120. The front light guide module 150 can be used in an environment with insufficient light. The soft front light design only illuminates the reading surface, allowing the user to read without affecting others. For example, when the front light guide module 150 of the display device 300 is turned on, the brightness of the visible area VA measured through the plastic substrate 111 is in the range of 100 nits to 140 nits.

[0098] Please refer to Figure 5 , which is a drawing Figure 4 Another schematic diagram of the front light guide module 150 in FIG. 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 an adhesive tape 154. The upper surface of the light guide plate 151 can be bonded to the lower surface 1132 of the support layer 113 by an adhesive 130b. The lower surface of the light guide plate 151 can be bonded to the upper surface of the display module 120 by an adhesive 130c. The circuit board 152 is bonded to the lower surface of the light guide plate 151 via an adhesive 130e. The light source 153 is disposed on the circuit board 152 and is configured to emit light toward the side of the light guide plate 151. The adhesive tape 154 is bonded to the upper surface of the light guide plate 151 and the upper surface of the light source 153.

[0099] In some implementations, the light source 153 is a light-emitting diode (LED), but the present disclosure is not limited thereto.

[0100] In some embodiments, the color of the tape 154 is white, but the disclosure is not limited thereto.

[0101] Please refer to Figure 6 , which is a schematic diagram illustrating a display device 400 according to another embodiment of the present disclosure. Figure 6As 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 the same as Figure 3 Therefore, the description of these elements can refer to the above related descriptions and will not be repeated here. Figure 3 In the embodiment shown, the display device 400 of this embodiment additionally adds a front light guide module 150. Specifically, the front light guide module 150 is bonded to the lower surface of the touch module 140 by adhesive 130c, and bonded to the upper surface of the display module 120 by adhesive 130d.

[0102] Please refer to Figure 7 , which is a partial schematic diagram of a composite cover plate 510 according to another embodiment of the present disclosure. Figure 7 As shown, the composite cover plate 510 includes a filling 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 Therefore, the description of these elements can refer to the above related descriptions and will not be repeated here. Figure 1 In the embodiment shown, the composite cover plate 510 of this embodiment replaces the combination of the plastic substrate 111 and the adhesive 130a with the combination of the filling layer 511 and the anti-glare coating 512. 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 (that is, including an upper layer 113a and a lower layer 113b), the decorative layer 112 can be disposed on the upper layer 113a. The filling layer 511 is attached to the upper layer 113a and the decorative layer 112. The filling 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 filling 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 filling layer 511 away from the support layer 113, thereby avoiding the problem of poor adhesion when the anti-glare coating 512 is directly coated on the upper layer 113a of the support layer 113 and the decoration layer 112. In addition, the decoration layer 112 and the shielding layer 114 are also separated by the support layer 113.

[0103] In some embodiments, the filling layer 511 includes a thermosetting transparent material or a UV light curing transparent material, but the present disclosure is not limited thereto.

[0104] It should be noted that Figure 7The advantages of the composite cover plate 510 shown include at least: (1) the decorative layer 112 is closer to the user and can present a better brightness value, so when the optical quality of the decorative layer 112 is measured, the distance between the measurement position and the decorative layer 112 can be shortened; (2) the decorative layer 112 is away from the bright light emitted by the front light guide module 150, thereby reducing the edge glow of the visible area VA, and in touch applications, the distance between the finger contact position and the touch module 140 can also be shortened; and (3) the use of one layer of plastic substrate 111 is reduced, but the original performance, such as haze, gloss, and surface hardness, can still be maintained.

[0105] From the above detailed description of the specific embodiments of the present disclosure, it can be clearly seen that in the composite cover plate and display device of the present disclosure, by limiting the thickness and optical density of the decorative layer, the decorative layer can achieve a sufficient decorative effect. Moreover, by further limiting the haze and thickness of the plastic substrate, the peripheral area of ​​the composite cover plate can also achieve sufficient brightness. In addition, by separating the decorative layer and the shielding layer, the total thickness of the composite cover plate can be effectively reduced, thereby effectively avoiding the warping problem in the peripheral area of ​​the composite cover plate.

[0106] Although the present disclosure has been disclosed in the above embodiments, it is not intended to limit the present disclosure. Anyone familiar with this technology can make various changes and modifications 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 definition of the attached claims.

Claims

1. A composite cover plate having a visible area and a peripheral area located at at least one side of the visible area, characterized in that: The composite decking comprises: a plastic substrate having a haze in the range of 10% to 30% and having a thickness in the range of 50 μm to 250 μm; a decorative layer attached to a surface of the plastic substrate, having a thickness in a range of 16 μm to 24 μm and an optical density in a range of 1.5 to 2.5, wherein the peripheral area of ​​the composite cover is defined by a vertical projection of the decorative layer; a supporting layer having an upper surface and a lower surface, wherein the upper surface is bonded to the plastic substrate and the decorative layer; and a masking layer attached to the lower layer and having 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 through the plastic substrate is in the range of 90 to 96.

2. The composite cover plate according to claim 1, characterized in that: The peripheral zone has a gloss in the range of 30 GU to 75 GU.

3. The composite cover plate according to claim 1, characterized in that: The plastic substrate has a pencil hardness ranging from 3H to 6H.

4. The composite cover plate according to claim 1, characterized in that: The shielding layer has a thickness in the range of 6 μm to 20 μm.

5. A display device, characterized in that: Include: A composite cover plate has a visible area and a peripheral area located on at least one side of the visible area, and comprises: a plastic substrate having a haze in the range of 10% to 30% and having a thickness in the range of 50 μm to 250 μm; a decorative layer attached to a surface of the plastic substrate, having a thickness in a range of 16 μm to 24 μm and an optical density in a range of 1.5 to 2.5, wherein the peripheral area of ​​the composite cover is defined by a vertical projection of the decorative layer; a supporting layer having an upper surface and a lower surface, wherein the upper surface is bonded to the plastic substrate and the decorative layer; and a masking layer attached to the lower layer and having an optical density in the range of 5.0 to 6.2; and a display module, disposed on a side of the support layer away from the plastic substrate, The L* of the CIELAB color space of the peripheral area of ​​the composite cover plate measured through the plastic substrate is in the range of 90 to 96.

6. The display device according to claim 5, characterized in that The peripheral zone has a gloss in the range of 30 GU to 75 GU.

7. The display device according to claim 5, characterized in that The plastic substrate has a pencil hardness ranging from 3H to 6H.

8. The display device according to claim 5, characterized in that The shielding layer has a thickness in the range of 6 μm to 20 μm.

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

10. The display device according to claim 5, characterized in that It further comprises a touch module, which is arranged between the composite cover plate and the display module.

11. A display device, characterized in that: Include: A composite cover plate, comprising: a plastic substrate having a haze in the range of 10% to 30% and having a thickness in the range of 50 μm to 250 μm; a decorative layer attached to a surface of the plastic substrate, having a thickness in a range of 16 μm to 24 μm and an optical density in a range of 1.5 to 2.5, wherein a peripheral area of ​​the composite cover is defined by a vertical projection of the decorative layer; a supporting layer having an upper layer and a lower layer, wherein the upper layer is bonded to the plastic substrate and the decorative layer; and a shielding layer attached to the lower layer and having an optical density in the range of 5.0 to 6.2, wherein the composite cover panel also has a viewing area connected to the peripheral area; a front light guide module, disposed on a side of the support layer away from the plastic substrate; and a display module, arranged on a side of the front light guide module away from the composite cover plate, When the front light guide module of the display device is turned on, the brightness of the visible area measured through the plastic substrate is within a range of 100 nits to 140 nits.

12. The display device according to claim 11, wherein: The L* of the CIELAB color space of the peripheral area of ​​the composite cover plate measured through the plastic substrate is in the range of 90 to 96.

13. The display device according to claim 11, wherein: The shielding layer has a thickness in the range of 6 μm to 20 μm.

14. The display device according to claim 11, wherein: The display module is an electronic ink display or a cholesterol liquid crystal display.

15. The display device according to claim 11, wherein: It further comprises a touch module, which is arranged between the composite cover plate and the display module.

Images