Cover plate, manufacturing method of cover plate and electronic product with display function

Abstract

The invention provides a cover plate, a manufacturing method of the cover plate and an electronic product with a display function, the cover plate comprises a central area and an edge area arranged around the central area, and the central area is provided with a boss protruding upwards relative to the edge area. The central area comprises a display area, a visible area surrounding the display area and a first part of a non-visible area surrounding the visible area, and the edge area is a second part of the visible area; the cover plate comprises a first shading part and a second shading part, the first shading part and the second shading part are located in the non-visual area, the first shading part is arranged perpendicular to the thickness direction of the cover plate, the outer boundary of the first shading part is flush with the outer boundary of the edge area, and the inner boundary of the first shading part is flush with the outer boundary of the visual area; the second shading part is used for shading light emitted from the side face of the boss. The first shading part and the second shading part respectively shield light rays emitted from the front surface and the side surface of the cover plate in the non-visual area, so that the problem of light leakage at the edge position of the cover plate is solved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a cover plate, a method for manufacturing the cover plate, and an electronic product with a display function. Background Art

[0002] As flexible OLED display technology matures, its applications are expanding, including in mobile devices, wearable devices, notebooks, and automotive applications, as well as in new applications such as e-cigarettes. During e-cigarette development, due to their small size and narrow bezels, and the raised platform design on their covers, the distance between the display area and the edge of the platform is relatively small, which is a major cause of light leakage from the edges of the products. This light leakage leads to a poor user experience and hinders the further promotion and application of the product. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a cover plate, a method for manufacturing the cover plate, and an electronic product with a display function, to solve the problem of light leakage at the edge of the cover plate. The specific technical solution is as follows:

[0004] According to a first aspect of the present application, there is provided a cover plate, comprising a central area and an edge area arranged around the central area, the central area having an upwardly protruding boss relative to the edge area, the central area comprising a display area, a visible area surrounding the display area, and a first part of a non-visual area surrounding the visible area, and the edge area being the second part of the visible area; the cover plate comprises a first light-shielding portion and a second light-shielding portion, the first light-shielding portion and the second light-shielding portion being located in the non-visual area, the first light-shielding portion being arranged perpendicular to the thickness direction of the cover plate, and the outer boundary of the first light-shielding portion being flush with the outer boundary of the edge area, the inner boundary of the first light-shielding portion being flush with the outer boundary of the visible area, and the second light-shielding portion being used to block light emitted from the side of the boss.

[0005] In some embodiments, the first light shielding portion is used to form the edge area of the cover plate, and extends toward the central area until it is flush with the outer boundary of the visible area.

[0006] In some embodiments, the second light shielding portion is arranged along the thickness direction of the cover plate, is located above the first light shielding portion, and is arranged in contact with the first light shielding portion, and the inner side surface of the second light shielding portion is flush with the inner side surface of the first light shielding portion.

[0007] In some embodiments, a first preset distance is formed between the second light shielding portion and the top surface of the cover.

[0008] In some embodiments, the first preset distance is 1 / 3 to 1 / 2 of the height of the boss.

[0009] In some embodiments, the outer side surface of the second light shielding portion is flush with the side surface of the cover plate, or the outer side surface of the second light shielding portion is spaced apart from the side surface of the cover plate.

[0010] In some embodiments, the outer side surface of the second light shielding portion is a plane or an inclined surface.

[0011] In some embodiments, the cover includes a first part and a second part, the first part includes the first light-shielding portion and the second light-shielding portion, the first part is made of black material, and the second part is made of transparent material; the first part and the second part are interlocked with each other through a two-color injection molding process to form the cover.

[0012] In some embodiments, the first portion is integrally formed.

[0013] In some embodiments, the cover plate includes a first film and a substrate layer; the substrate layer includes a substrate center area and a substrate edge area arranged around the substrate center area, the substrate center area has an upwardly protruding substrate boss relative to the substrate edge area, the substrate center area is arranged corresponding to the center area, the substrate edge area is arranged corresponding to the edge area, and the substrate boss is arranged corresponding to the boss; the first light-shielding portion is located on the bottom surface of the substrate layer; the first film includes a first area and a second area, the first area is arranged opposite to the display area and the visible area, and the second area is arranged opposite to the non-visible area, and the second area is provided with a first black coating on one of its surfaces along the thickness direction, the first film layer covers the top surface of the substrate layer, so that the first black coating is located on the side of the first film away from the substrate layer to form the second light-shielding portion; wherein, the second light-shielding portion is formed before the first film is compounded with the substrate layer.

[0014] In some embodiments, the cover plate also includes a second film, the second film includes a third area and a fourth area, the third area is arranged opposite to the display area and the visible area, the fourth area is arranged opposite to the non-visual area, and the fourth area is provided with a second black coating on one of its surfaces along the thickness direction; the second film layer covers the bottom surface of the substrate layer, and the second black coating is located on the side of the second film away from the substrate layer to form the first light-shielding portion, and the first light-shielding portion is formed before the second film is compounded with the substrate layer.

[0015] In some embodiments, the second light-shielding portion includes a first partition, a second partition, and a third partition, wherein the first partition covers the side surface of the substrate boss, the second partition covers a portion of the top surface of the substrate boss outside the outer boundary of the visible area, and the third partition covers a portion of the top surface of the substrate edge area.

[0016] In some embodiments, a second preset distance is provided between the second partition and the outer boundary of the visible area, and the second preset distance is 0.2 mm-0.4 mm.

[0017] In some embodiments, there is a third preset distance between the outer boundary of the first diaphragm and the outer boundary of the edge area, and the third preset distance is 0.3 mm-0.5 mm.

[0018] In some embodiments, the first black coating layer and the second black coating layer are formed by screen printing.

[0019] In some embodiments, the substrate layer is polycarbonate or polymethyl methacrylate, the first film is polyethylene terephthalate, and the second film is polyethylene terephthalate.

[0020] A second aspect of the present application provides a method for manufacturing a cover plate, which is used to manufacture the cover plate described above, and includes at least the following steps:

[0021] Providing a first film, comprising a first area and a second area, wherein the first area is disposed opposite to the display area and the visual area, and the second area is disposed opposite to the non-visual area, and a first black coating is disposed on one surface of the second area along its thickness direction;

[0022] Providing a second film, comprising a third area and a fourth area, wherein the third area is disposed opposite to the display area and the visual area, and the fourth area is disposed opposite to the non-visual area, and a second black coating is disposed on one surface of the fourth area along its thickness direction;

[0023] placing the first diaphragm and the second diaphragm into corresponding positions of the injection mold;

[0024] The raw materials required to form the cover plate are injected into the injection mold to perform double-sided in-mold injection molding, wherein the first black coating is located on the bottom surface of the cover plate to form the second light-shielding portion, and the second black coating is located on the top surface of the cover plate to at least cover the side surfaces of the boss to form the first light-shielding portion.

[0025] A third aspect of the present application provides an electronic product with a display function, wherein the electronic product with a display function includes the cover plate described above.

[0026] Beneficial effects of the embodiments of the present application:

[0027] The cover plate and the method for manufacturing the cover plate, as well as the electronic product with a display function, provided in the embodiments of the present application, are configured such that a first shading portion is provided on the portion of the bottom surface of the cover plate located outside the visible area, and a second shading portion is provided in the non-visible area of the boss to block the light emitted from the side. The first shading portion is mainly used to block the light emitted from the front of the cover plate in the non-visible area, and the second shading portion is used to block the light emitted from the side of the cover plate in the non-visible area, thereby effectively preventing the emitted light from being emitted from the non-visible area of the cover plate, thereby improving the problem of light leakage at the edge of the cover plate.

[0028] Of course, it is not necessary to achieve all the advantages described above at the same time when implementing any product or method of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0030] Figure 1 This is one of the forms of the structural schematic diagram of the cover provided in Example 1 of the present application;

[0031] Figure 2 This is the second form of the structural schematic diagram of the cover provided in the first embodiment of the present application;

[0032] Figure 3 This is the third form of the structural schematic diagram of the cover provided in the first embodiment of the present application;

[0033] Figure 4 This is a schematic structural diagram of the cover plate provided in Example 2 of the present application;

[0034] Figure 5 Schematic diagram of the IML injection molding process provided in Example 2 of this application;

[0035] Figure 6 This is a schematic structural diagram of the cover plate provided in Example 3 of the present application;

[0036] Figure 7 This is a schematic structural diagram of the first diaphragm provided in Example 3 of the present application;

[0037] Figure 8 This is a schematic structural diagram of the second diaphragm provided in Example 3 of the present application;

[0038] Figure 9A flow chart of a double-sided IML injection molding process in one embodiment of the present application is provided.

[0039] The reference numerals are as follows:

[0040] Central area A1; edge area A2; display area AA; visible area VA; outer boundary of the visible area VA1; inner boundary of the visible area VA2; non-visible area NA; boss 1; first light shielding portion 2; second light shielding portion 3; inner side surface 31 of the second light shielding portion; outer side surface 32 of the second light shielding portion; first partition 33; second partition 34; third partition 35; first diaphragm 4; first area 41; second area 42; first black coating layer 421; substrate layer 5; substrate central area 51; substrate edge area 52; substrate boss 53; second diaphragm 6; third area 61; fourth area 62; second black coating layer 621; positioning hole 63; first preset distance L1; second preset distance L2; third preset distance L3; thickness direction H. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field based on this application are within the scope of protection of this application.

[0042] As the size of electronic products with display functions becomes smaller and smaller, and the borders become narrower and narrower, light leakage occurs at the edges of electronic products, causing serious customer complaints and seriously affecting the promotion and use of Flex OLED (Flexible OLED) in new application fields. In order to solve the above problems, this application provides a cover plate, such as Figure 1 As shown, the cover plate includes a central area A1 and an edge area A2 surrounding central area A1. Central area A1 has an upwardly projecting boss 1 relative to edge area A2. Central area A1 includes a display area AA, a visible area VA surrounding the display area AA, and a first portion of a non-visible area NA surrounding the visible area VA. Edge area A2 is the second portion of the visible area VA. The cover plate includes a first light shielding portion 2 and a second light shielding portion 3. The first light shielding portion 2 and the second light shielding portion 3 are located in the non-visible area NA. The first light shielding portion 2 is arranged perpendicular to the thickness direction H of the cover plate, and the outer boundary of the first light shielding portion 2 is flush with the outer boundary of the edge area A2. The inner boundary of the first light shielding portion 2 is flush with the outer boundary VA1 of the visible area. The second light shielding portion 3 is used to block light emitted from the side of the boss 1. It can be understood that the inner boundary VA2 of the visible area is also the dividing line between the display area AA and the visible area VA.

[0043] By setting a first light-shielding portion 2 on the portion of the bottom surface of the cover plate located outside the visible area VA, and setting a second light-shielding portion 3 for blocking the side-emitted light in the non-visible area NA of the boss 1, the first light-shielding portion 2 is mainly used to block the light emitted from the front of the cover plate in the non-visible area NA, and the second light-shielding portion 3 is used to block the light emitted from the side of the cover plate in the non-visible area NA, so as to better prevent the emitted light from being emitted from the non-visible area NA of the cover plate, thereby improving the problem of light leakage at the edge of the cover plate.

[0044] Based on the different formation methods of the first light shielding portion 2 and the second light shielding portion 3, this application provides the following three embodiments:

[0045] Example (1):

[0046] like Figure 1 、 Figure 2 and Figure 3 As shown, the first light shielding portion 2 is used to form an edge area A2 of the cover plate, and extends toward the center area A1 until it is flush with the outer boundary VA1 of the viewing area.

[0047] The edge area A2 of the cover is directly made into the first shading portion 2, and the first shading portion 2 is partially embedded in the central area A1, and the inner boundary of the first shading portion 2 is controlled to be flush with the outer boundary VA1 of the visible area. In this way, it can be ensured that all light emitted from the front of the cover in the non-visible area NA can be blocked or absorbed.

[0048] The edge area A2 of the cover plate is directly made into the first light shielding portion 2, and there is no need to spray ink on the edge area A2 of the cover plate for light shielding, thereby simplifying the subsequent processes after the cover plate is manufactured.

[0049] Furthermore, the second shading portion 3 is provided along the thickness direction H of the cover plate and is located above the first shading portion 2 and is provided in contact with the first shading portion 2 . The inner side surface 31 of the second shading portion is flush with the inner side surface of the first shading portion 2 .

[0050] The second light shielding portion is located above the first light shielding portion 2, and the two are arranged in contact. There is no gap between the first light shielding portion 2 and the second light shielding portion 3, which can prevent the light emitted from the side from being emitted through the gap between the two, and the effect of blocking the side light leakage is better. The second light shielding portion 3 is arranged inside the boss 1 along the thickness direction H of the cover plate. The light emitted from the side of the cover plate can be blocked by the second light shielding portion 3, and the light emitted from the front can be blocked by the first light shielding portion 2, thereby solving the problem of light leakage at the edge of the cover plate. The inner side surface 31 of the second light shielding portion is flush with the inner side surface of the first light shielding portion 2, and both are flush with the outer boundary VA1 of the visible area, so that the first light shielding portion 2 and the second light shielding portion 3 can block the oblique light at the boundary line between the visible area VA and the non-visible area NA, preventing the oblique light from entering the non-visible area NA, and improving the problem of light leakage at the edge of the cover plate. The oblique light mentioned here refers to the light whose angle with the light perpendicular to the top surface of the cover plate is greater than zero degrees.

[0051] In this embodiment, the cover is divided into two parts. The first part includes the first light shielding portion 2 and the second light shielding portion 3, and the second part is the portion other than the first light shielding portion 2 and the second light shielding portion 3. The first part is made of a black material, and the second part is made of a transparent material. The first and second parts can be interlocked through a two-color injection molding process to form the cover.

[0052] Two-color injection molding is a process that combines two different plastic materials into one piece during the same injection molding process. This technology is often used to create composite products with varying colors, hardness, or tactile properties. The basic principle of two-color injection molding is to inject one material (called the base material) during a single injection process. The mold is then rotated 180 degrees and a different material (called the cover material) is injected. The advantage of two-color injection molding is the ability to produce products with multiple characteristics, such as varying colors, hardness, or tactile properties, thereby enhancing the product's aesthetics and functionality. This process is widely used in consumer electronics, automotive, and medical fields.

[0053] The cover plate formed by the two-color injection molding process has a built-in light-shielding effect. There is no need to spray ink on the cover plate after it is formed to form a light-shielding layer. The production process of the cover plate is simpler, the product yield is improved, and customer complaints are greatly reduced.

[0054] Conventional solutions to address light leakage from the cover plate typically involve spraying ink on the sidewalls. This approach is complex, requires specialized masking fixtures, and the thickness of the ink applied to the sidewalls is difficult to control, resulting in high costs. While spraying ink on the sidewalls can address light leakage, it increases the cost per panel by 15%, and the difficulty in controlling the thickness of the ink sprayed on the sidewalls creates the risk of interference with overall assembly.

[0055] Alternatively, the first portion may be made of a black polycarbonate material, and the second portion may be made of a transparent polycarbonate material.

[0056] Polycarbonate (PC), also known as PC plastic, is a high-molecular polymer containing carbonate groups in its molecular chain. Based on the structure of the ester groups, it can be categorized into aliphatic, aromatic, and aliphatic-aromatic types. It offers advantages such as high transparency, light weight, sound insulation, heat insulation, flame retardancy, and impact resistance, making it widely applicable. Furthermore, polycarbonate can be formulated with various pigments to create different colors based on specific needs. Therefore, the first and second parts of the cover can both be made of polycarbonate, with the first part simply being black by adding black pigment to ensure its light-blocking effect. By making the first and second parts from the same material, the two parts blend better, improving the cover's strength and extending its lifespan.

[0057] In addition, the ideal temperature range of PC plastic in the injection molding process is usually controlled at 250-350℃. This temperature range is the stage where plastic molecules fully flow and fuse into shape. It is also the key point to ensure the physical properties of plastic products. Its molding temperature is lower than that of aluminum-silicon material cover plates. Therefore, using polycarbonate material to make cover plates can also save energy.

[0058] The first part can be formed in one piece.

[0059] The first light shielding portion 2 and the second light shielding portion 3 are integrally formed, and the production of the first light shielding portion 2 and the second light shielding portion 3 can be completed by one-time injection molding, which is conducive to simplifying the production process of the cover plate.

[0060] In some embodiments, as Figure 1 、 Figure 2 and Figure 3 As shown, there is a first preset distance L1 between the second light shielding portion 3 and the top surface of the cover.

[0061] In this embodiment, the height of the second light shielding portion 3 is less than that of the boss 1, allowing the second light shielding portion 3 to be completely located within the boss 1. This increases the contact area between the second light shielding portion 3 and the rest of the cover, ensuring a more secure fit between the second light shielding portion 3 and the rest of the cover, and increasing the structural stability of the cover. Furthermore, the second light shielding portion 3 is completely located within the boss 1 and does not protrude from the cover surface, resulting in a more uniform appearance.

[0062] Alternatively, as Figure 1 、 Figure 2 and Figure 3As shown, the first preset distance L1 is 1 / 3 to 1 / 2 of the height of the boss 1, and can be, for example, 1 / 3, 5 / 12, 1 / 2, etc. In other words, the height of the second light shielding portion 3 is greater than or equal to half the height of the boss 1 and less than or equal to 2 / 3 of the height of the boss 1. This can block most light and improve the problem of light leakage from the side of the cover. In addition, considering the limitations of the injection molding process itself, it is difficult for the second light shielding portion 3 to abut the top surface of the cover. Therefore, the first preset distance L1 between the second light shielding portion 3 and the top surface of the cover can also reduce the difficulty of molding.

[0063] In some embodiments, as Figure 3 As shown, the outer side surface 32 of the second light shielding portion is flush with the side surface of the cover plate, or as shown in FIG. Figure 1 、 Figure 2 As shown, the outer side surface 32 of the second light shielding portion is spaced apart from the side surface of the cover plate.

[0064] The outer side surface 32 of the second shading portion is flush with the side surface of the cover plate. At this time, the width of the second shading portion 3 is consistent with the width of the non-visible area NA of the boss 1, making the structure other than the first shading portion 2 and the second shading portion 3 simpler, which is conducive to simplifying the structure of the mold.

[0065] When there is a gap between the outer side surface 32 of the second shading portion and the side surface of the cover, the width of the second shading portion 3 is reduced, and the fitting effect between the second shading portion 3 and the second portion of the cover is better, which is beneficial to improving the strength of the cover.

[0066] As can be understood, the second shading portion 3 primarily blocks side light. The effectiveness of this shading depends primarily on whether light outside the outer boundary VA1 of the visible area is blocked. Therefore, as long as the inner boundary of the second shading portion 3 is positioned at the outer boundary VA1 of the visible area, light can be blocked from entering outside the visible area VA, ensuring effective shading. Since the effectiveness of shading side light depends on the design height of the second shading portion and is not significantly affected by its design width, reducing the width of the second shading portion 3 will not affect the shading effect.

[0067] In some embodiments, the outer side surface 32 of the second light shielding portion can be a plane or an inclined surface. Figure 1 As shown, the outer side surface 32 of the second light shielding portion is an inclined surface, which is helpful to reduce the difficulty of mold design. Figure 2 、 Figure 3 As shown, the outer side surface 32 of the second light shielding portion is a plane.

[0068] Embodiment (two):

[0069] like Figure 4As shown, the cover plate includes a first film 4 and a substrate layer 5. The substrate layer 5 includes a substrate central area 51 and a substrate edge area 52 arranged around the substrate central area 51. The substrate central area 51 has a substrate boss 53 protruding upward relative to the substrate edge area 52. The substrate central area 51 is arranged corresponding to the central area A1, the substrate edge area 52 is arranged corresponding to the edge area A2, and the substrate boss 53 is arranged corresponding to the boss 1. The first light shielding portion 2 is located on the bottom surface of the substrate layer 5. Figure 7 The first film 4 includes a first area 41 and a second area 42. The first area 41 is arranged opposite to the display area AA and the visible area VA, and the second area 42 is arranged opposite to the non-visible area NA. A first black coating 421 is provided on one surface of the second area 42 along its thickness direction H. The first film layer covers the top surface of the substrate layer 5, so that the first black coating 421 is located on the side of the first film 4 away from the substrate layer 5 to form a second light-shielding portion 3; wherein the second light-shielding portion 3 is formed before the first film 4 is compounded with the substrate layer 5.

[0070] The shape of the base material layer 5 is consistent with that of the cover plate, with only a slight difference in size. It is understandable that this difference is caused by the first film 4. The cover plate is formed by the first film 4 and the base material layer 5. Specifically, it can be formed by the IML (In-Mold Labeling) process. The IML process is a process in which a printed decorative film is placed in an injection mold and then injection molded, so that the product surface has a beautiful decorative effect. The injection molding process diagram is shown in FIG. Figure 5 As shown, Figure 5 The IML injection molding process is illustrated using the first film 4 as an example. Due to its advantages, such as precise transfer of complex patterns, improved production efficiency, and reduced production costs, the IML process is widely used in fields such as home appliances, automobiles, and consumer electronics, becoming a key technology in modern manufacturing. The IML process not only enhances product aesthetics but also increases durability and scratch resistance. Therefore, it is widely used in the production of products such as mobile phone casings, home appliance panels, and automotive interiors, satisfying consumers' pursuit of a high-quality lifestyle.

[0071] In this embodiment, before the first film 4 and the substrate layer 5 are subjected to the IML process, the second area 42 of the first film 4 is formed with a first black coating 421. The form of the first film 4 can be referred to Figure 7After the first film 4 is covered on the substrate layer 5, the side of the first film 4 away from the substrate layer 5 is the second light-shielding portion 3, wherein the second light-shielding portion 3 is made on the first film 4 before the cover is formed. Since the first film 4 is a regular horizontal surface, the production difficulty is lower than that on the side wall of the cover, and there are more optional production processes, which is conducive to reducing production costs. In addition, the coating is prepared on a horizontal surface, and the coating thickness is easier to control. The first light-shielding portion 2 is located on the bottom surface of the substrate layer 5, and the bottom surface is a regular horizontal surface. Therefore, the first light-shielding portion 2 can be made directly on the cover. The first light-shielding portion 2 covers the non-visible area NA from the bottom surface of the cover, blocking the light emitted vertically from the non-visible area NA. The second light-shielding portion 3 covers at least the side of the boss 1 from the top surface of the cover, blocking the light emitted obliquely from the non-visible area NA, thereby improving the light leakage problem at the edge of the cover.

[0072] Optionally, the first black coating 421 may be made of, but not limited to, ink. The first light shielding portion 2 is a black coating, and its material may be made of, but not limited to, ink.

[0073] Embodiment (three):

[0074] In this embodiment, based on the embodiment (II), the cover plate is provided with a second film 6, and the first light shielding portion 2 is manufactured on the second film 6. The manufacturing method thereof is similar to the manufacturing method of the second light shielding portion 3. Specifically, Figure 6 、 Figure 7 and Figure 8As shown, the cover plate includes a first film 4, a substrate layer 5, and a second film 6. The substrate layer 5 includes a substrate center region 51 and a substrate edge region 52 surrounding the substrate center region 51. The substrate center region 51 has an upwardly projecting substrate boss 53 relative to the substrate edge region 52. The substrate center region 51 corresponds to the center region A1, the substrate edge region 52 corresponds to the edge region A2, and the substrate boss 53 corresponds to the boss 1. The first film 4 includes a first region 41 and a second region 42. The first region 41 corresponds to the display area AA and the visual area VA, while the second region 42 corresponds to the non-visible area NA. A first black coating 421 is provided on one surface of the second region 42 along its thickness direction H. The first film layer covers the top surface of the substrate layer 5, such that the first black coating 421 is located on the side of the first film 4 away from the substrate layer 5, thereby forming a second light-shielding portion 3. The second light-shielding portion 3 is formed before the first film 4 and the substrate layer 5 are combined. The second film 6 includes a third area 61 and a fourth area 62. The third area 61 is arranged opposite to the display area AA and the visible area VA, and the fourth area 62 is arranged opposite to the non-visible area NA. A second black coating 621 is provided on one surface of the fourth area 62 along its thickness direction H. The second film layer covers the bottom surface of the substrate layer 5, and the second black coating 621 is located on the side of the second film 6 away from the substrate layer 5 to form a first light-shielding portion 2, wherein the first light-shielding portion 2 is formed before the second film 6 is compounded with the substrate layer 5.

[0075] In this embodiment, the cover plate is composed of a first film 4, a substrate layer 5, and a second film 6. Specifically, it can be formed using a double-sided IML (In-Mold Labeling) process. This method is similar to the IML injection molding process, in which two labeling patterns are simultaneously embedded in a single injection mold. In other words, the first film 4 and the second film 6 are pre-placed in the corresponding positions of the injection mold, and then injection molded together, resulting in a double-sided IML injection molded product.

[0076] Before the first film 4 and the second film 6 and the substrate layer 5 are subjected to the IML process, Figure 7 As shown, the second area 42 of the first diaphragm 4 is formed with a first black coating 421, as shown in FIG. Figure 8As shown, the fourth region 62 of the second film 6 is formed with a second black coating 621. After the first film 4 is applied to the substrate layer 5, the portion located on the side of the first film 4 facing away from the substrate layer 5 becomes the second light shielding portion 3. After the second film 6 is applied to the substrate layer 5, the portion located on the side of the second film 6 facing away from the substrate layer 5 becomes the first light shielding portion 2. The first black coating 421 and the second black coating 621 are formed on the surfaces of the first film 4 and the second film 6, respectively. Compared to coating on the bottom and side walls of the cover plate, this approach offers lower manufacturing difficulty and a wider range of manufacturing process options, helping to reduce production costs. Furthermore, since the coating is applied on a horizontal surface, the coating thickness is easier to control. The first light shielding portion 2 covers the non-visible area NA from the bottom surface of the cover plate, blocking light emitted vertically from the non-visible area NA. The second light shielding portion 3 covers at least the side of the boss 1 from the top surface of the cover plate, blocking light emitted obliquely from the non-visible area NA, thereby improving light leakage from the edge of the cover plate.

[0077] The first shading portion 2 and the second shading portion 3 are formed on the second diaphragm 6 and the first diaphragm 4 respectively. The cover plate obtained by a single double-sided IML injection molding can meet the requirement of no light leakage at the edge. There is no need to perform secondary processing on the cover plate to produce the first shading portion 2, which is conducive to simplifying the production process and improving the production efficiency of the cover plate.

[0078] Optionally, the first black coating layer 421 and the second black coating layer 621 may be formed by screen printing.

[0079] The coating is produced using a screen printing process. Compared to spray coating on the cover, this process does not require a masking jig, which can reduce production costs. Screen printing on a horizontal surface makes it easier to control the coating thickness, resulting in a more uniform thickness of the first black coating 421 and the second black coating 621.

[0080] The first black coating layer 421 and the second black coating layer 621 may be made of, but are not limited to, ink.

[0081] Optionally, the substrate layer 5 is made of polycarbonate or polymethyl methacrylate, the first film 4 is made of polyethylene terephthalate (PET), and the second film 6 is made of polyethylene terephthalate.

[0082] Alternatively, as Figure 6 As shown, the second light shielding portion 3 includes a first partition 33, a second partition 34 and a third partition 35. The first partition 33 covers the side surface of the substrate boss 53, the second partition 34 covers a portion of the top surface of the substrate boss 53 outside the outer boundary VA1 of the visible area, and the third partition 35 covers a portion of the top surface of the substrate edge area 52.

[0083] In this embodiment, the second shading portion 3 not only covers the side of the boss 1, but also covers the edge area A2 on the outside of the boss 1 and the non-visible area NA on the top surface of the boss 1. It can completely block the light obliquely emitted from the non-visible area NA, further improving the light leakage problem at the edge of the cover.

[0084] Alternatively, as Figure 6 As shown, there is a second preset distance L2 between the second partition 34 and the outer boundary VA1 of the visual area. The second preset distance L2 is 0.2mm-0.4mm, for example, it can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, etc.

[0085] A distance of 0.2mm-0.4mm is maintained between the second partition 34 and the outer boundary VA1 of the visible area, preventing the second light shielding portion 3 from partially encroaching on the visible area VA due to misalignment. Setting a second preset distance L2 also reduces the difficulty of aligning the first film 4. When the inner boundary of the first light shielding portion 2 is flush with the outer boundary VA1 of the visible area, the second preset distance L2 between the second partition 34 and the visible area VA does not affect light leakage from the edge of the cover plate.

[0086] It should be noted that, since the inner boundary of the first shading portion 2 is flush with the outer boundary VA1 of the visible area, the distance between the second partition 34 and the outer boundary VA1 of the visible area is the distance between the second partition 34 and the inner boundary of the first shading portion 2 .

[0087] Alternatively, as Figure 6 As shown, there is a third preset distance L3 between the outer boundary of the first diaphragm 4 and the outer boundary of the edge area A2. The third preset distance L3 is 0.3mm-0.5mm, for example, it can be 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc.

[0088] In this embodiment, the overall size of the first membrane 4 is designed to be slightly smaller than the outer contour of the top surface of the cover plate. After the first membrane 4 is attached to the substrate layer 5, the outer boundary of the first membrane 4 will not exceed the outer boundary of the substrate layer 5. There is no need to cut the first membrane 4, which simplifies the process.

[0089] A second aspect of the present application provides a method for manufacturing a cover plate, which is used to manufacture the cover plate described above, and includes at least the following steps:

[0090] S1: providing a first film 4, comprising a first area 41 and a second area 42, wherein the first area 41 is disposed opposite to the display area AA and the visual area VA, and the second area 42 is disposed opposite to the non-visual area NA, and a first black coating 421 is disposed on one surface of the second area 42 along the thickness direction H thereof;

[0091] S2: Providing a second film 6, including a third area 61 and a fourth area 62, wherein the third area 61 is arranged opposite to the display area AA and the visual area VA, and the fourth area 62 is arranged opposite to the non-visual area NA, and a second black coating 621 is provided on one surface of the fourth area 62 along the thickness direction H thereof;

[0092] S3: Place the first diaphragm 4 and the second diaphragm 6 into corresponding positions of the injection mold;

[0093] S4: Inject the raw materials required to form the cover into the injection mold, and perform double-sided in-mold injection molding, wherein the first black coating 421 is located on the bottom surface of the cover to form the second light-shielding portion 3, and the second black coating 621 is located on the top surface of the cover, covering at least the side of the boss 1 to form the first light-shielding portion 2.

[0094] S5: Remove the mold and take out the required cover.

[0095] In this embodiment, the first black coating 421 and the second black coating 621 are formed on the surfaces of the first diaphragm 4 and the second diaphragm 6, respectively. Compared with forming the coating on the bottom wall and side walls of the cover plate, the manufacturing difficulty is lower and more manufacturing processes are available, which is conducive to reducing production costs. In addition, because the coating is applied on a flat surface, the coating thickness is relatively easy to control. The first light shielding portion 2 covers the non-visible area NA from the bottom surface of the cover plate, blocking the light emitted vertically from the non-visible area NA. The second light shielding portion 3 covers at least the side of the boss 1 from the top surface of the cover plate, blocking the light emitted obliquely from the non-visible area NA, thereby improving the problem of light leakage at the edge of the cover plate.

[0096] It should be noted that the order of steps S1 to S3 and S4 to S6 can be reversed, or both can be performed simultaneously on two devices.

[0097] refer to Figure 5 Specifically, the molding process of the first mold piece is:

[0098] S11 : providing a first film 4 mother sheet, printing a first black coating 421 at a specific position of the first film 4 mother sheet, and baking the first black coating 421 .

[0099] S12: After the first diaphragm 4 mother sheet is dried, it is heated to soften it.

[0100] S13: forming into a desired shape by hot pressing.

[0101] S14: The unnecessary portion of the mother sheet of the first diaphragm 4 is cut off by punching, and the remaining portion is the final required shape of the first diaphragm 4.

[0102] The molding process of the second diaphragm 6 is the same as that of the first diaphragm 4. The specific process is as follows:

[0103] S21 : providing a second film 6 mother sheet, printing a second black coating 621 at a specific position of the second film 6 mother sheet, and baking the second black coating 621 .

[0104] S22: After drying, the second film 6 having a second black coating 621 is heated to soften the mother sheet.

[0105] S23: Forming into a desired shape by hot pressing.

[0106] S24: The unnecessary portion of the second diaphragm 6 mother sheet is cut off by punching, and the remaining portion is the final required shape of the second diaphragm 6.

[0107] refer to Figure 9 , Figure 9 The specific process of double-sided IML injection molding of a cover plate in one embodiment is shown.

[0108] The process of making the first membrane 4 is as follows: first raw materials are received to form the first membrane 4 master sheet, which is then screen-printed using ink. The first membrane 4 master sheet is then baked at a temperature of 80°C to 100°C for 25-30 minutes to fully cure the ink. The first membrane 4 master sheet is then coated with a first protective film to protect the first membrane 4 during the manufacturing process. The first membrane 4 master sheet is then punched out to obtain the first membrane 4. The first membrane 4 is then inspected for quality. If it is qualified, it is again coated with a second protective film to protect the first membrane 4 during production and transportation.

[0109] The process of making the second membrane 6 is as follows: the second raw material is taken in to form the second membrane 6 master sheet, which is then screen-printed. The printing material is generally ink, and the second membrane 6 master sheet is then baked at a temperature of 80°C to 100°C for 25-30 minutes to fully solidify the ink. The second membrane 6 master sheet is then covered with a first protective film to protect the first membrane 4 during the manufacturing process. The second membrane 6 master sheet is then punched and then punched to obtain the second membrane 6. The second membrane 6 is then inspected for quality. If it is qualified, it is again covered with a second protective film to protect the first membrane 4 during production and transportation.

[0110] The prepared first diaphragm 4 and second diaphragm 6 are placed in the corresponding positions of the injection mold for injection molding. After the molding is stable, the mold is opened to obtain the required cover plate, and the cover plate shape is polished. Finally, the cover plate quality is inspected and, if qualified, the cover plate is packaged.

[0111] During the process of manufacturing the cover plate, the punched first membrane 4 and the second membrane 6 are further coated, which can better protect the first membrane 4 and the second membrane 6.

[0112] The process of making the second diaphragm 6 also includes a punching step. This is because the second light shielding portion 3 of the second diaphragm 6 needs to match the display area AA of the display panel. During the double-sided IML injection molding process, it is necessary to design positioning holes 63 for the second diaphragm 6 to ensure the position accuracy of the assembly. Figure 6 and Figure 8 shown.

[0113] When using double-sided IML injection molding to produce a cover plate, certain requirements are placed on the corners of the substrate layer 5. The corners where the substrate layer 5 contacts the first diaphragm 4 must be chamfered to ensure a smooth transition. This reduces the difficulty of completely filling the mold cavity with the molding liquid during injection molding and improves product yield.

[0114] A third aspect of an embodiment of the present application provides an electronic product with a display function, which may be, but is not limited to, a mobile phone, a tablet computer, an electronic cigarette, etc. The electronic product with a display function includes the cover plate described above.

[0115] An electronic product with a display function is provided with a first shading portion 2 on a portion of the bottom surface of the cover plate located outside the visible area VA, and a second shading portion 3 for blocking side-emitted light is provided in the non-visible area NA of the boss 1. The first shading portion 2 is mainly used to block light emitted from the front of the cover plate in the non-visible area NA, and the second shading portion 3 is used to block light emitted from the side of the cover plate in the non-visible area NA. This can better prevent the emitted light from being emitted from the non-visible area NA of the cover plate, thereby improving the problem of light leakage at the edge of the cover plate, so that the electronic product with a display function maintains good appearance uniformity in both dark and bright states, which is conducive to improving user satisfaction.

[0116] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0117] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0118] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application are included in the scope of protection of the present application.

Claims

1. A cover plate, characterized in that: The device comprises a central area and an edge area surrounding the central area, wherein the central area has an upwardly protruding platform relative to the edge area, the central area includes a display area, a visual area surrounding the display area, and a first portion of a non-visual area surrounding the visual area, and the edge area is the second portion of the visual area; The cover plate includes a first light-shielding portion and a second light-shielding portion, the first light-shielding portion and the second light-shielding portion are located in the non-visible area, the first light-shielding portion is arranged perpendicular to the thickness direction of the cover plate, and the outer boundary of the first light-shielding portion is flush with the outer boundary of the edge area, the inner boundary of the first light-shielding portion is flush with the outer boundary of the visible area, and the second light-shielding portion is used to block the light emitted from the side of the boss.

2. The cover plate according to claim 1, wherein: The first light shielding portion is used to form the edge area of the cover plate and extends toward the central area until it is flush with the outer boundary of the visible area.

3. The cover plate according to claim 2, wherein: The second light shielding portion is arranged along the thickness direction of the cover plate, is located above the first light shielding portion, and is arranged in contact with the first light shielding portion. The inner side surface of the second light shielding portion is flush with the inner side surface of the first light shielding portion.

4. The cover plate according to claim 3, wherein: There is a first preset distance between the second light shielding portion and the top surface of the cover plate.

5. The cover plate according to claim 4, characterized in that: The first preset distance is 1 / 3 to 1 / 2 of the height of the boss.

6. The cover plate according to claim 4, characterized in that: An outer side surface of the second light shielding portion is flush with a side surface of the cover plate, or an outer side surface of the second light shielding portion is spaced apart from the side surface of the cover plate.

7. The cover plate according to claim 6, characterized in that: The outer side surface of the second light shielding portion is a flat surface or an inclined surface.

8. The cover plate according to any one of claims 2 to 7, characterized in that: The cover plate includes a first portion and a second portion, the first portion includes the first light shielding portion and the second light shielding portion, the first portion is made of a black material, and the second portion is made of a transparent material; The first part and the second part are embedded with each other through a two-color injection molding process to form the cover plate.

9. The cover plate according to claim 8, characterized in that: The first part is formed in one piece.

10. The cover plate according to claim 1, wherein: The cover plate includes a first membrane and a substrate layer; The substrate layer includes a substrate central region and a substrate edge region disposed around the substrate central region, the substrate central region having an upwardly protruding substrate boss relative to the substrate edge region, the substrate central region being disposed correspondingly to the central region, the substrate edge region being disposed correspondingly to the edge region, and the substrate boss being disposed correspondingly to the boss; The first light shielding portion is located on the bottom surface of the substrate layer; The first film includes a first area and a second area, the first area is arranged opposite to the display area and the visible area, and the second area is arranged opposite to the non-visible area. A first black coating is provided on one surface of the second area along its thickness direction. The first film layer covers the top surface of the substrate layer, so that the first black coating is located on a side of the first film away from the substrate layer, thereby forming the second light-shielding portion; Wherein, the second light shielding portion is formed before the first film is combined with the substrate layer.

11. The cover plate according to claim 10, wherein: The cover plate further includes a second film, the second film including a third area and a fourth area, the third area is arranged opposite to the display area and the visual area, the fourth area is arranged opposite to the non-visual area, and a second black coating is provided on one surface of the fourth area along its thickness direction. The second film layer covers the bottom surface of the substrate layer, and the second black coating is located on the side of the second film away from the substrate layer to form the first light-shielding portion, which is formed before the second film is compounded with the substrate layer.

12. The cover plate according to claim 11, wherein: The second light-shielding portion includes a first partition, a second partition, and a third partition. The first partition covers the side surface of the substrate boss, the second partition covers a portion of the top surface of the substrate boss outside the outer boundary of the visible area, and the third partition covers a portion of the top surface of the substrate edge area.

13. The cover plate according to claim 12, wherein: There is a second preset distance between the second partition and the outer boundary of the visual area, and the second preset distance is 0.2mm-0.4mm.

14. The cover plate according to claim 12, wherein: There is a third preset distance between the outer boundary of the first diaphragm and the outer boundary of the edge area, and the third preset distance is 0.3 mm-0.5 mm.

15. The cover plate according to any one of claims 11 to 14, characterized in that: The first black coating layer and the second black coating layer are formed by screen printing.

16. The cover plate according to claim 11, wherein: The substrate layer is polycarbonate or polymethyl methacrylate, the first film is polyethylene terephthalate, and the second film is polyethylene terephthalate.

17. A method for manufacturing a cover plate, used for manufacturing the cover plate according to claim 1, characterized in that: At least the following steps are included: Providing a first film, comprising a first area and a second area, wherein the first area is disposed opposite to the display area and the visual area, and the second area is disposed opposite to the non-visual area, and a first black coating is disposed on one surface of the second area along its thickness direction; Providing a second film, comprising a third area and a fourth area, wherein the third area is disposed opposite to the display area and the visual area, and the fourth area is disposed opposite to the non-visual area, and a second black coating is disposed on one surface of the fourth area along its thickness direction; placing the first diaphragm and the second diaphragm into corresponding positions of the injection mold; The raw materials required to form the cover plate are injected into the injection mold to perform double-sided in-mold injection molding, wherein the first black coating is located on the bottom surface of the cover plate to form the second light-shielding portion, and the second black coating is located on the top surface of the cover plate to at least cover the side surfaces of the boss to form the first light-shielding portion.

18. An electronic product with a display function, characterized in that: The electronic product with a display function comprises the cover plate according to any one of claims 1 to 16.

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