Protective cover plate, method of manufacturing the same, and electronic device

Abstract

The present invention relates to a protective cover, a method for preparing the same, and an electronic device. The protective cover comprises a cover base, a decorative layer, an adhesive layer, and an optical functional sheet. The cover base has a decorative area, the decorative layer is disposed on the decorative area of ​​the cover base, and the decorative layer has a hollow hole. The adhesive layer is disposed in the hollow hole of the decorative layer and is bonded to the cover base. The optical functional sheet is bonded to a surface of the adhesive layer that is away from the cover base. The optical functional sheet comprises an optical substrate and an optical functional layer disposed on the optical substrate, and either the optical substrate or the optical functional layer is bonded to a surface of the adhesive layer that is away from the cover base. The protective cover has a low production cost and is not limited by production equipment or coating clamping. This is beneficial for improving product yield and reducing costs, has high production capacity, and is easy to promote and apply.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, in particular to a protective cover plate, a preparation method thereof and an electronic device. BACKGROUND

[0002] With the development of smart consumer electronics technology, functions such as face recognition, 3D image, and high-definition video are integrated on the same product, so multiple coating is required to achieve additional optical functions. The surface of the current electronic product is generally provided with a protective cover plate for protecting the internal structure of the electronic product. However, during the additional production of multiple types of optical functions, the optical production process may cause damage to the cover plate, spectral differences, and appearance defects, resulting in a high product failure rate and high production cost. SUMMARY

[0003] Therefore, it is necessary to provide a protective cover plate and a preparation method thereof and an electronic device capable of improving product yield.

[0004] A protective cover plate comprises:

[0005] a cover plate substrate having a decorative area;

[0006] a decorative layer disposed on the decorative area of the cover plate substrate, the decorative layer having a hollow hole;

[0007] an adhesive layer disposed in the hollow hole of the decorative layer and bonded to the cover plate substrate; and

[0008] an optical functional sheet bonded to the surface of the adhesive layer away from the cover plate substrate; the optical functional sheet comprises an optical substrate and an optical functional layer disposed on the optical substrate, and any one of the optical substrate and the optical functional layer is bonded to the surface of the adhesive layer away from the cover plate substrate.

[0009] The protective cover plate adopts a process of combining an optical functional sheet and bonding, so that the optical functional layer is arranged in the hollow hole of the decorative layer of the cover plate substrate, and the optical function is added to the cover plate substrate. Compared with the process of directly using coating on the protective cover plate to manufacture the optical functional layer, the preparation of the protective cover plate does not need to coat the entire cover plate substrate of large size, which is clamped and placed in the coating equipment for coating. This avoids the problem of increasing the failure rate caused by the need to sequentially coat the same product in multiple coating equipment to form different optical functional layers when facing multiple different optical functional layers. The protective cover plate adds the optical functional layer to the optical substrate to form an optical functional sheet convenient for pasting, and then combines with the cover plate substrate. The manufacturing cost is low, is not limited by the manufacturing equipment and coating clamping, is conducive to improving the product yield and reducing the cost, has high production capacity, and is convenient for popularization and application.

[0010] In some embodiments, at least part of the optical functional sheet is located within the hollow hole.

[0011] In some embodiments, the projection area of the optical functional sheet on the cover substrate in the direction perpendicular to the cover substrate is less than the projection area of the hollow hole on the cover substrate in the direction perpendicular to the cover substrate.

[0012] In some embodiments, at least part of the optical functional sheet is exposed outside the hollow hole; the projection area of the optical functional sheet on the cover substrate in the direction perpendicular to the cover substrate is greater than or equal to the projection area of the hollow hole on the cover substrate in the direction perpendicular to the cover substrate.

[0013] In some embodiments, the cross-sectional shape of the optical functional sheet perpendicular to the cover substrate is T-shaped or trapezoidal or hexagonal or octagonal.

[0014] In some embodiments, the surface of the adhesive layer away from the cover substrate is not lower than the surface of the decorative layer away from the cover substrate; the optical functional sheet is located outside the hollow hole and protrudes from the decorative layer.

[0015] In some embodiments, the decorative layer has a plurality of hollow holes; the adhesive layers in any adjacent plurality of the hollow holes are connected to each other or separated from each other.

[0016] A method for preparing a protective cover plate, comprising the following steps:

[0017] providing a cover substrate having a decorative area;

[0018] forming a decorative layer having a hollow hole on the decorative area of the cover substrate;

[0019] forming an adhesive layer bonding with the cover substrate in the hollow hole of the decorative layer;

[0020] bonding an optical functional sheet on the surface of the adhesive layer away from the cover substrate; the optical functional sheet comprises an optical substrate and an optical functional layer provided on the optical substrate, wherein the optical functional layer or the optical substrate is bonded with the surface of the adhesive layer away from the cover substrate.

[0021] An electronic device comprising a body, an optical detection component and the protective cover plate according to any one of the above, the optical detection component is connected with the body, and the protective cover plate is connected with the body; wherein the optical functional sheet of the protective cover plate is arranged correspondingly with the optical detection component.

[0022] In some embodiments, the optical detection component is a camera, a face recognition component, an infrared sensing component, a visible light sensing component, a laser sensing component, or a combination of at least two of the five. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Structure diagram of a protective cover plate according to an embodiment;

[0024] Figure 2 Structure diagram of a protective cover plate according to an embodiment; Figure 1 Structure diagram of a protective cover plate according to an embodiment;

[0025] Figure 3 Structure diagram of a protective cover plate according to an embodiment;

[0026] Figure 4 Structure diagram of a protective cover plate according to an embodiment. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present application, a more comprehensive description of the present application will be given below, and the preferred embodiments of the present application will be provided. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0029] An embodiment of the present application provides a protective cover plate and a method for manufacturing the same. The structure of the protective cover plate will be described in detail below in conjunction with the method for manufacturing the same.

[0030] Referring to Figure 1 A protective cover plate 100 according to an embodiment of the present application includes a cover plate substrate 110, a decorative layer 120, an adhesive layer 130, and an optical functional sheet 140.

[0031] The cover plate substrate 110 has a decorative area 112.

[0032] The decorative layer 120 is disposed on the decorative area 112 of the cover plate substrate 110, and the decorative layer 120 has a hollow hole.

[0033] The adhesive layer 130 is disposed in the hollow hole of the decorative layer 120 and is bonded to the cover plate substrate 110.

[0034] The optical functional sheet 140 is bonded to the surface of the adhesive layer 130 away from the cover substrate 110.

[0035] Further, the optical functional sheet 140 comprises an optical substrate and an optical functional layer disposed on the optical substrate, and any one of the optical substrate and the optical functional layer is bonded to the surface of the adhesive layer 130 away from the cover substrate 110.

[0036] The manufacturing method of the protective cover plate 100 can be prepared by the following steps S10-S40:

[0037] Step S10, providing a cover substrate 110 with a decorative area 112.

[0038] Step S20, forming a decorative layer 120 with a hollow hole in the decorative area 112 of the cover substrate 110.

[0039] Step S30, forming an adhesive layer 130 bonded to the cover substrate 110 in the hollow hole of the decorative layer 120.

[0040] Step S40, bonding an optical functional sheet 140 to the surface of the adhesive layer 130 away from the cover substrate 110; the optical functional sheet 140 comprises an optical substrate and an optical functional layer disposed on the optical substrate, and the optical functional layer or the optical substrate is bonded to the surface of the adhesive layer 130 away from the cover substrate 110.

[0041] The protective cover plate 100 adopts the process of bonding the optical functional sheet 140 and the adhesive layer 130, so that the optical functional layer is arranged in the hollow hole of the decorative layer 120 of the cover substrate 110, and the optical function is added to the cover substrate 110. Compared with the process of directly forming the optical functional layer on the protective cover plate 100 by plating, the preparation of the protective cover plate 100 does not need to plate the whole cover substrate 110 with large size, and avoids the problem that when facing multiple different optical functional layers, the same product needs to be plated in multiple plating equipment to form different optical functional layers, which increases the yield. The protective cover plate 100 and its manufacturing method add the optical functional layer to the optical substrate to form the optical functional sheet 140 which is convenient to bond, and then combine with the cover substrate 110, which has low manufacturing cost, is not limited by manufacturing equipment and plating clamping, is conducive to improving product yield and reducing cost, has high production capacity, and is convenient for popularization and application.

[0042] In addition, when facing the optical detection components such as optical lenses with curved surface design, if the coating process is directly used to coat the optical lenses to make optical layers, the thickness and optical differences of different curved surface positions are affected by the topography, which is not conducive to the production of high-precision optical layers. By pre-forming the optical functional sheet 140 with small volume and convenient to paste, and then combining with the cover plate base 110, the curved surface design of the optical lens is not affected. Therefore, the above-mentioned protective cover plate 100 and the preparation method thereof are widely used.

[0043] It can be understood that the optical functional layer in the optical functional sheet 140 can be multi-layer, which can be multi-layer with the same optical function or multi-layer with different optical functions. Further, the optical functional layer can be located on one side of the optical substrate, or on both sides of the optical substrate. Further, the optical functional sheet 140 can be provided with a decorative functional layer or a conductive touch functional layer, etc. in addition to the optical functional layer.

[0044] In some embodiments, the optical functional layer in the optical functional sheet 140 can be in direct contact with the optical substrate, or can have one or more transition layers. The transition layer can be one or a combination of an auxiliary optical functional layer, a bonding promotion layer, a plating stability layer, a special texture effect layer, or a decorative layer 120.

[0045] In some embodiments, the topography of the optical substrate in the optical functional sheet 140 can be 2D plane, 3D curved surface, special shape, etc. which can be formed by corresponding preparation methods.

[0046] The preparation method of the optical functional layer can be one or a combination of one or more of the preparation methods such as coating, printing, pressing, coating, and deposition. Further, the material used for the optical functional layer can be organic, inorganic, or a combination of organic and inorganic layers. In a specific example, the optical functional layer formed by coating is formed by the alternating layer combination of SiO2 and Ti3O5 on the optical substrate to form different types of spectral combination layers; wherein SiO2 is a low-refractive optical functional layer and Ti3O5 is a high-refractive optical functional layer.

[0047] Further, the optical substrate can be glass, transparent plastic sheet (such as PMMA or PC, etc.), transparent plastic film (such as PET film, COP film, CPI film or PC film, etc.), sapphire, transparent microcrystalline material (such as microcrystalline glass, etc.), inorganic transparent die-casting sheet (such as aluminum oxynitride die-casting material, etc.), which can use a single type of substrate or a combination of multiple types of substrates. Among them, the glass can be one of strengthened, semi-strengthened, and un-strengthened. Further, the thickness of the glass is greater than or equal to 0.001 mm, and preferably 0.05 mm to 0.4 mm.

[0048] For example, the infrared cut-off optical functional sheet, the preparation steps of the optical functional layer are as follows: forming an infrared cut-off coating layer on a glass optical substrate, and then cutting into small pieces. The size of the small piece can be determined according to the size of the detection area of the detector. The edge of the small piece can be engraved, polished, and etched to improve the strength and reliability. The infrared anti-reflection optical functional sheet, the ultraviolet cut-off optical functional sheet, and the like can be prepared by similar methods. It can be understood that the types of the optical functional sheet 140 are not limited to this.

[0049] In some embodiments, the cover substrate 110 can be glass, plastic, sapphire, or other transparent material. The shape of the cover substrate 110 can be made by CNC (i.e., numerical control), polishing, and glass chemical strengthening. Accordingly, the cover substrate 110 can be a transparent cover, a plastic transparent cover, a transparent glass cover, or a sapphire transparent cover.

[0050] Further, the cover substrate 110 can have a 2D plane, a 3D curved surface (formed by hot bending, engraved cold working, die casting / pouring, cold bending, etc.), a special shape (formed by hot bending, engraved cold working, die casting / pouring, cold bending, etc.), or the like. The cover substrate 110 can be formed by corresponding preparation methods.

[0051] Further, the side of the cover substrate 110 away from the decorative layer 120 can be provided with a hard protective coating layer (not shown) or a hard anti-reflection coating layer (i.e., hard AR coating layer) (not shown). Further, the hard protective coating layer or the hard anti-reflection coating layer can be further provided with a fingerprint-resistant layer.

[0052] In some embodiments, the decorative layer 120 on the decorative area 112 can be formed by ink, i.e., the decorative layer 120 is an ink layer. Since the cover substrate 110 is mostly transparent, the part of the cover substrate 110 without the decorative area 112 is a transparent window area 114. In other words, in some embodiments, the cover substrate 110 can include the decorative area 112 and the window area 114. In a specific example, the decorative area 112 is arranged around the window area 114, as shown in FIG. 1B. In some examples, the window area 114 is the display area. Figure 1

[0053] Please refer to Figure 2 In some embodiments, the cover substrate 110 and the optical functional sheet 140 can be connected by an adhesive layer 130. For example, the optical functional sheet 140 and the surface of the cover substrate provided with the decorative area 112 (i.e., the inner surface of the cover substrate) are bonded by using an adhesive material such as a solid optical transparent adhesive (OCA), a liquid optical transparent adhesive (OCR), or the like, to form a transparent adhesive layer 130.

[0054] ​Further, the adhesive layer 130 can be thickness controlled by a coining die, a spacer, or other thickness control carrier. Further, the thickness of the adhesive layer 130 is controlled to be within 20 mm, preferably 1-300 microns.

[0055] Further, when the optical substrate of the optical functional sheet 140 has the optical functional layer on only one side, the optical functional sheet 140 can be attached to the surface of the cover substrate 110 having the decorative area 112 via the optical substrate or the optical functional layer.

[0056] In a specific example, the optical functional sheet 140 is attached to the surface of the cover substrate 110 having the decorative area 112 via the optical functional layer.

[0057] Further, the positions of the hollowed-out holes are positions required for corresponding optical detection components in the electronic device. Further, in the preparation process of the electronic device, the optical functional sheet 140 can be combined with the optical detection components (such as a camera, a face recognition component, an infrared sensing component, etc.) of corresponding functions first, and then attached to the cover substrate 110. Alternatively, the optical functional sheet 140 can be attached to the cover substrate 110 first, and then combined with the optical detection components (such as a camera, a face recognition component, an infrared sensing component, etc.) of corresponding functions. The combination method can be optical adhesive attachment, or frame adhesive attachment, hot melt adhesive attachment, etc.

[0058] Further, the number of the hollowed-out holes on the decorative layer 120 is multiple, and correspondingly, one optical functional layer is attached in each hollowed-out hole. In this way, the optical function requirements at different positions can be achieved, and the production requirements of 3D or special-shaped curved optical protective cover 100 can also be met.

[0059] Please refer to Figure 2 or Figure 3 In some embodiments, at least part of the optical functional sheet 140 is located in the hollowed-out hole. Further, at least part of the optical functional sheet 140 is exposed from the hollowed-out hole.

[0060] Further, please refer to Figure 2 The projection area of the optical functional sheet 140 on the cover substrate 110 in the direction perpendicular to the cover substrate 110 is less than the projection area of the hollowed-out hole on the cover substrate 110 in the direction perpendicular to the cover substrate 110.

[0061] In the example as shown in Figure 2 , the cross-sectional shape of the optical functional sheet 140 perpendicular to the cover substrate 110 is rectangular. It can be understood that in other examples, the cross-sectional shape of the optical functional sheet 140 perpendicular to the cover substrate 110 is not limited to this, but can also be T-shaped, trapezoidal, hexagonal, or octagonal, etc.

[0062] Further, referring to Figure 3 , the projection area of the optical functional sheet 140 on the cover substrate 110 in the direction perpendicular to the cover substrate 110 is greater than or equal to the projection area of the hollow hole on the cover substrate 110 in the direction perpendicular to the cover substrate 110. Accordingly, the adhesive layer 130 is further arranged between the surface of the decorative layer 120 away from the cover substrate 110 and the optical functional sheet 140.

[0063] In this way, the optical functional sheet 140 partially covers the decorative layer 120, which can avoid the problem that the gap between the optical functional sheet 140 and the decorative layer 120 affects the appearance and the optical detection function.

[0064] In the example as shown in Figure 3 , the cross-sectional shape of the optical functional sheet 140 perpendicular to the cover substrate 110 is T-shaped. The optical functional sheet 140 with this shape, on the one hand, is partially located in the hollow hole and is firmly adhered, and on the other hand, partially covers the decorative layer 120, which can avoid the problem that the gap between the optical functional sheet 140 and the decorative layer 120 affects the appearance and the optical detection function. It can be understood that the optical functional sheet 140 with the cross-sectional shape of T-shaped can be formed by an optical substrate with the cross-sectional shape of T-shaped and an optical functional layer arranged on the optical substrate. It can be understood that in other examples, the cross-sectional shape of the optical functional sheet 140 perpendicular to the cover substrate 110 is not limited to this, but can also be different shapes such as rectangular, trapezoidal, hexagonal, or octagonal.

[0065] Referring to Figure 4 , in some other embodiments, the surface of the adhesive layer 130 away from the cover substrate 110 is not lower than the surface of the decorative layer 120 away from the cover substrate 110; in other words, the adhesive layer 130 fills the entire hollow hole of the decorative layer 120, and the adhesive layer 130 is at least flush with the decorative layer 120, and of course can be higher than the decorative layer 120. Accordingly, the optical functional sheet 140 is located outside the hollow hole and protrudes from the decorative layer 120. The adhesive layer 130 is further arranged between the surface of the decorative layer 120 away from the cover substrate 110 and the optical functional sheet 140. In this way, the optical functional sheet 140 is simple to manufacture, has a lower cost, and partially covers the decorative layer 120, which can avoid the problem that the gap between the optical functional sheet 140 and the decorative layer 120 affects the appearance and the optical detection function.

[0066] In the example as shown in Figure 4In the example shown, the projection of the optical functional sheet 140 on the cover substrate 110 in the direction perpendicular to the cover substrate 110 preferably completely covers the projection of the hollow hole on the cover substrate 110 in the direction perpendicular to the cover substrate 110. At this time, the projection area of the optical functional sheet 140 on the cover substrate 110 in the direction perpendicular to the cover substrate 110 is preferably greater than or equal to the projection area of the hollow hole on the cover substrate 110 in the direction perpendicular to the cover substrate 110.

[0067] It can be understood that the projection of the optical functional sheet 140 on the cover substrate 110 in the direction perpendicular to the cover substrate 110 can also be located within the projection of the hollow hole on the cover substrate 110 in the direction perpendicular to the cover substrate 110. That is, the projection area of the optical functional sheet 140 on the cover substrate 110 in the direction perpendicular to the cover substrate 110 can also be less than the projection area of the hollow hole on the cover substrate 110 in the direction perpendicular to the cover substrate 110.

[0068] In some examples, as shown in FIG. 1, the cover substrate 110 is provided with a plurality of hollow holes 120, and the optical functional sheet 140 is provided with a plurality of optical functional sheets 140 corresponding to the plurality of hollow holes 120. Figure 4 In the example shown, the cross-sectional shape of the optical functional sheet 140 perpendicular to the cover substrate 110 is rectangular. It can be understood that in other examples, the cross-sectional shape of the optical functional sheet 140 perpendicular to the cover substrate 110 is not limited to this, but can also be different shapes such as T-shaped, trapezoidal, hexagonal, or octagonal.

[0069] Further, referring to FIG. 1, FIG. 2, or FIG. 3, Figure 3 or Figure 4 When the hollow hole and the optical functional sheet 140 are both multiple, the optical functional sheet 140 is one-to-one pasted in each hollow hole. In some examples, the adhesive layer 130 in each hollow hole is also one-to-one and independent of each other. In some examples, the adhesive layers 130 in any multiple adjacent hollow holes can be connected to each other. For example, the adhesive layers 130 in two or more adjacent hollow holes can be connected to each other, which is particularly suitable for the adhesive layers 130 in hollow holes with close spacing, which are connected to each other at one step, simplifying the process.

[0070] An embodiment of the present application also provides an electronic device of an embodiment, comprising a body, an optical detection component, and the protective cover 100 of any one of the above. The optical detection component is connected to the body, and the protective cover 100 is connected to the body. Among them, the optical functional sheet 140 of the protective cover 100 is correspondingly arranged with the optical detection component.

[0071] Further, the electronic device can be a mobile phone, a computer, a notebook, an iPad, a television, etc. Among them, the optical detection component can be a camera, a face recognition component, an infrared sensing component, a visible light sensing component, a laser sensing component, etc., or a combination of at least two of these to form a combined function detection component.

[0072] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered within the scope of the present disclosure.

[0073] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It shall be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A protective cover, characterized in that: include: a cover base having a decorative area; A decorative layer is provided on the decorative area of ​​the cover base, the decorative layer having a hollow hole, and the position of the hollow hole is used to correspond to the installation position of the optical detection component; an adhesive layer, disposed in the hollow hole of the decorative layer and bonded to the cover base; and an optical functional sheet bonded to a surface of the adhesive layer away from the cover substrate; the optical functional sheet comprises an optical substrate and an optical functional layer provided on the optical substrate, either the optical substrate or the optical functional layer being bonded to a surface of the adhesive layer away from the cover substrate, and the optical functional sheet being provided corresponding to the hollow hole; At least a portion of the optical functional sheet is located in the hollow hole.

2. The protective cover according to claim 1, wherein: A projected area of ​​the optical functional sheet on the cover substrate along a direction perpendicular to the cover substrate is smaller than a projected area of ​​the hollow hole on the cover substrate along a direction perpendicular to the cover substrate.

3. The protective cover according to claim 1, wherein: At least a portion of the optical functional sheet is exposed from the hollow hole; A projected area of ​​the optical functional sheet on the cover substrate along a direction perpendicular to the cover substrate is greater than or equal to a projected area of ​​the hollow hole on the cover substrate along a direction perpendicular to the cover substrate.

4. The protective cover according to claim 3, wherein: The cross-section of the optical functional sheet perpendicular to the cover substrate is T-shaped, trapezoidal, hexagonal, or octagonal.

5. The protective cover according to any one of claims 1 to 4, characterized in that: The decorative layer has a plurality of hollow holes, and the adhesive layers of any adjacent hollow holes are connected to each other or independent of each other.

6. A method for preparing a protective cover, characterized in that: The steps include: providing a cover substrate having a decorative area; forming a decorative layer having hollow holes on the decorative area of ​​the cover substrate, wherein the hollow holes are used to correspond to the installation positions of the optical detection components; forming an adhesive layer in the hollow holes of the decorative layer to be bonded to the cover base; The optical functional sheet is bonded to the surface of the adhesive layer away from the cover substrate, and the optical functional sheet is arranged corresponding to the hollow hole; the optical functional sheet includes an optical substrate and an optical functional layer arranged on the optical substrate, wherein the optical functional layer or the optical substrate is bonded to the surface of the adhesive layer away from the cover substrate, and at least a portion of the optical functional sheet is located in the hollow hole.

7. An electronic device, characterized in that: It comprises a main body, an optical detection component and a protective cover according to any one of claims 1 to 5, wherein the optical detection component is connected to the main body, and the protective cover is connected to the main body; wherein the optical functional sheet of the protective cover is arranged corresponding to the optical detection component.

8. The electronic device according to claim 7, wherein: The optical detection component is a camera, a face recognition component, an infrared sensing component, a visible light sensing component, a laser sensing component, or a combined functional detection component formed by at least two of these five.

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