Flexible display cover plate and manufacturing method therefor, display module, and display apparatus

Abstract

A flexible display cover plate (10) and a manufacturing method therefor, a display module, and a display apparatus. The flexible display cover plate (10) comprises a first cover plate layer (11) and a second cover plate layer (12) which are stacked in a first direction (X). The orthographic projection of the second cover plate layer (12) on the first cover plate layer (11) completely covers the first cover plate layer (11). The second cover plate layer (12) comprises a view area (121) and a non-view area (122). The non-view area (122) is located around the view area (121), and the non-view area (122) comprises an ink area (122a) and a non-ink area (122b). The ink area (122a) is arranged between the non-ink area (122b) and the view area (121), and there is an overlapping region (M) between the orthographic projection of the non-ink area (122b) on the first cover plate layer (11) and the first cover plate layer (11). The present application improves the manufacturing reliability for flexible display cover plates.

Description

Flexible display cover, manufacturing method thereof, display module and display device

[0001] This application claims priority to Chinese patent application No. 202311767443.9 filed on December 20, 2023, entitled “Flexible display cover, display module and display device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a flexible display cover and a preparation method thereof, a display module, and a display device. Background Art

[0003] With advancements in display technology, flexible display devices, with their deformable and foldable features, have become highly popular in the display industry. Flexible display devices include flexible display cover plates. These plates offer significant strength and impact resistance, protecting the internal structure of the flexible display device from external damage. Current flexible display cover plates typically consist of ultra-thin glass (UTG).

[0004] Summary of the Invention

[0005] The present application provides a flexible display cover and a preparation method thereof, a display module and a display device.

[0006] In one aspect, a flexible display cover is provided, comprising:

[0007] A first cover plate layer and a second cover plate layer stacked along a first direction, wherein an orthographic projection of the second cover plate layer on the first cover plate layer completely covers the first cover plate layer;

[0008] The second cover layer includes a visible area and a non-visible area, wherein the non-visible area is located around the visible area, and the non-visible area includes an ink area and a non-ink area;

[0009] The ink area exists between the non-ink area and the visible area, and an orthographic projection of the non-ink area on the first cover layer overlaps with the first cover layer.

[0010] Optionally, the non-visible area includes a first side area, the first side area includes the non-ink area, and an orthographic projection of the non-ink area in the first side area on the first cover layer has a first overlapping area with the first cover layer;

[0011] The dimension L1 of the non-ink area in the first side area in the second direction satisfies: 0.5 mm ≤ L1 ≤ 20 mm, and the dimension L2 of the first overlapping area in the third direction satisfies: 0 < L2 ≤ 1 mm;

[0012] The second direction is the length direction of the first side area, the third direction is the width direction of the first side area, and the first direction, the second direction and the third direction are perpendicular to each other.

[0013] Optionally, the first side area includes a plurality of the non-ink areas, and the plurality of the non-ink areas in the first side area are arranged at equal intervals along the second direction.

[0014] Optionally, a ratio of a total size of the plurality of non-ink areas in the first side area in the second direction to a length of the first side area is in a range of 0.1 to 0.5.

[0015] Optionally, the non-visible area further includes a second side area adjacent to the first side area, the length direction of the second side area is the third direction, the width direction of the second side area is the second direction, the second side area includes the non-ink area, and an orthographic projection of the non-ink area in the second side area on the first cover layer has a second overlapping area with the first cover layer;

[0016] A dimension L3 of the non-ink area in the second side area in the third direction satisfies: 0.5 mm ≤ L3 ≤ 20 mm, and a dimension L4 of the second overlapping area in the second direction satisfies: 0<L4 ≤ 1 mm.

[0017] Optionally, the second side area includes a plurality of the non-ink areas, and the plurality of the non-ink areas in the second side area are arranged at equal intervals along the third direction.

[0018] Optionally, a ratio of a total size of the plurality of non-ink areas in the second side edge region in the third direction to a length of the second side edge region is in a range of 0.1 to 0.5.

[0019] Optionally, the non-ink area is provided on the second cover plate layer at the minimum side distance from the first cover plate layer.

[0020] Optionally, the distance from the non-ink area to the vertex of the second cover layer is less than a preset distance.

[0021] Optionally, the flexible display cover has a bending area, and the non-ink area is located in other areas outside the bending area.

[0022] Optionally, the non-visible area includes a line-out side area, and the line-out side area is used to connect to a line-out area of ​​a display device.

[0023] Optionally, the non-visible area includes a non-line side area, the distance between the non-line side area and the side of the first cover layer ranges from 0.05 mm to 1 mm, and the non-ink area is provided in the non-line side area.

[0024] Optionally, the flexible display cover plate further includes an adhesive layer, and the adhesive layer is located between the first cover plate layer and the second cover plate layer.

[0025] Optionally, the shape of the non-ink area includes at least one of a rectangle, a circle, an ellipse, a diamond, and a trapezoid.

[0026] Optionally, the first cover layer is made of ultra-thin glass.

[0027] In another aspect, a method for preparing a flexible display cover is provided, for manufacturing the flexible display cover according to any one of the above aspects, comprising:

[0028] A first cover plate layer and a second cover plate layer are stacked along a first direction to obtain a flexible display cover plate motherboard, wherein an orthographic projection of the second cover plate layer on the first cover plate layer completely covers the first cover plate layer, the second cover plate layer includes a visible area and a non-visible area, the non-visible area is located around the visible area, the non-visible area includes an ink area and a non-ink area, wherein the ink area is between the non-ink area and the visible area, and an orthographic projection of the non-ink area on the first cover plate layer overlaps with the first cover plate layer;

[0029] The flexible display cover plate motherboard is cut along a cutting line to obtain a flexible display cover plate, wherein the cutting line is located in the non-visible area and passes through the non-ink area.

[0030] Optionally, before stacking the first cover plate layer and the second cover plate layer along the first direction, the method further comprises:

[0031] Provide cover motherboard;

[0032] forming an ink layer on the cover plate master;

[0033] The ink layer on the cover plate master is windowed to form the ink area and the non-ink area, thereby obtaining the first cover plate layer.

[0034] In yet another aspect, a display module is provided, comprising the flexible display cover as described in any one of the above aspects.

[0035] Optionally, the display module further includes a display substrate;

[0036] The flexible display cover is arranged on the display substrate, and a surface of the first cover layer in the flexible display cover away from the second cover layer is adhered to the display substrate.

[0037] In another aspect, a display device is provided, comprising the display module as described in any one of the above aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a schematic structural diagram of a flexible display cover provided in an embodiment of the present application;

[0039] FIG2 is a schematic structural diagram of a flexible display cover provided in an embodiment of the present application;

[0040] FIG3 is a schematic structural diagram of another flexible display cover provided in an embodiment of the present application;

[0041] FIG4 is a schematic structural diagram of another flexible display cover provided in an embodiment of the present application;

[0042] FIG5 is a schematic structural diagram of another flexible display cover provided in an embodiment of the present application;

[0043] FIG6 is a schematic structural diagram of a flexible display cover provided by another embodiment of the present application;

[0044] FIG7 is a schematic structural diagram of another flexible display cover provided by another embodiment of the present application;

[0045] FIG8 is a schematic structural diagram of another flexible display cover provided by another embodiment of the present application;

[0046] FIG9 is a schematic structural diagram of a flexible display cover provided in another embodiment of the present application;

[0047] FIG10 is a schematic structural diagram of another flexible display cover provided in yet another embodiment of the present application;

[0048] FIG11 is a schematic flow chart of a method for preparing a flexible display cover according to an embodiment of the present application;

[0049] FIG12 is a schematic structural diagram of a display module provided in an embodiment of the present application;

[0050] FIG13 is a schematic structural diagram of a display module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0052] The "ranges" disclosed herein are defined in terms of lower and upper limits. A given range is defined by selecting a lower limit and an upper limit, and the selected lower and upper limits define the boundaries of the specific range. Ranges defined in this manner are inclusive of the endpoints and can be combined arbitrarily, i.e., any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60 to 120 and 80 to 110 are listed for a particular parameter, it is understood that ranges of 60 to 110 and 80 to 120 are also contemplated. Furthermore, if the minimum range values ​​listed are 1 and 2, and if the maximum range values ​​listed are 3, 4, and 5, then the following ranges are all contemplated: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4, and 2 to 5. In this application, unless otherwise specified, the numerical range "a to b" is an abbreviation for any combination of real numbers between a and b, where a and b are both real numbers. For example, the numerical range "0 to 5" means that all real numbers between "0 to 5" have been listed herein, and "0 to 5" is simply an abbreviation for these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0053] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0054] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0055] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification of this application and the appended claims, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" refer to one, two or more. The term "and / or" is used to describe the association relationship of associated objects, indicating that three relationships can exist; for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0056] References to "one embodiment," "some embodiments," "an example," or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0057] The flexible display cover provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0058] Advances in display technology have enabled foldable smart devices. These devices are also called flexible devices. Flexible devices, such as smartphones and tablets, include flexible display covers. These covers are foldable, enabling the entire device to bend or fold.

[0059] Ultra-thin glass is widely used in flexible display cover panels due to its excellent flexibility, smooth feel, and good uniformity. Due to its thinness, ultra-thin glass is very easy to break during the assembly process of the flexible display cover panel. In addition, after the flexible display cover panel is assembled, it is usually necessary to laser cut the entire flexible display cover panel to complete the production and assembly of subsequent products. However, during the laser cutting process of the flexible display cover panel, due to the requirements of the production process, the cutting edge is usually close to the ultra-thin glass, so it is very likely to cut the ultra-thin glass, causing damage to the ultra-thin glass, which in turn affects the display effect of the display device.

[0060] An embodiment of the present application provides a flexible display cover. For example, Figures 1 and 2 are schematic structural diagrams of a flexible display cover provided in an embodiment of the present application. Figure 1 is a schematic cross-sectional view of the flexible display cover shown in Figure 2 taken along the AA' direction. As shown in Figure 1 or Figure 2, the flexible display cover 10 includes: a first cover layer 11 and a second cover layer 12 stacked along a first direction X. In Figure 2, the first direction X is a direction perpendicular to the paper and upward (not marked in Figure 2).

[0061] The first direction X is the height direction of the flexible display cover 10, which can also be called the thickness direction of the flexible display cover 10. When the thickness of the first cover layer 11, the second cover layer 12 and other film layers is mentioned below, it refers to their dimensions in the first direction X.

[0062] 1 or 2 , the orthographic projection of the second cover plate layer 12 on the first cover plate layer 11 completely covers the first cover plate layer 11 .

[0063] Here, full coverage means that the orthographic projection of the second cover layer 12 on the first cover layer 11 completely covers the first cover layer 11, without missing any part of the first cover layer 11. In other words, the orthographic projection of the first cover layer 11 on the second cover layer 12 is located within the area where the second cover layer 12 is located.

[0064] Referring to FIG. 1 or FIG. 2 , the second cover layer 12 includes a view area (VA) 121 and a non-view area 122. The non-view area 122 is located around the view area 121. The non-view area 122 includes an ink area 122a and a non-ink area 122b. The ink area 122a exists between the non-ink area 122b and the view area 121. Furthermore, the orthographic projection of the non-ink area 122b on the first cover layer 11 overlaps with the first cover layer 11 in an area M.

[0065] Among them, the area around the visible area 121 refers to the area near the side (hereinafter referred to as the side area) remaining after the second cover layer 12 removes the visible area 121, that is, the non-visible area 122 is the side area on the second cover layer 12. The non-visible area 122 on the second cover layer 12 is used to set the ink area 122a and the non-ink area 122b. The specific ratio of the visible area 121 and the non-visible area 122 occupied by the second cover layer 12 is not limited in the embodiments of the present application. For example, the ratio of the visible area 121 and the non-visible area 122 on the second cover layer 12 is set according to the setting range of the visible area and the ink area known in the industry.

[0066] In the embodiment of the present application, the non-visible area 122 on the second cover layer 12 may include four side areas on the second cover layer 12. The non-ink area 122b may be provided in the non-visible area on the second cover layer 12. This may be done by providing the non-ink area 122b on one or more side areas of the second cover layer 12. For example, referring to FIG. 2 , the non-ink area 122b may be provided on each of the four side areas of the second cover layer 12. Optionally, the side of the non-ink area 122b away from the visible area 121 is the side of the second cover layer 12, i.e., the non-ink area 122b is provided along a portion of the side of the second cover layer 12.

[0067] Correspondingly, the first cover layer 11 includes a visible area and a non-visible area. The visible area on the first cover layer 11 is the area where the orthographic projection of the visible area 121 on the second cover layer 12 is located on the first cover layer 11. The non-visible area on the first cover layer 11 is the area located around the visible area. In the embodiment of the present application, since the orthographic projection of the non-ink area 122b on the second cover layer 12 on the first cover layer 11 overlaps with the first cover layer 11 in an area M, and there is an ink area 122a between the non-ink area 122b on the second cover layer 12 and the visible area 121, the non-visible area on the first cover layer 11 includes an area opposite to the non-ink area 122b on the second cover layer 12 (i.e., the overlapping area M) and an area opposite to the ink area 122a on the second cover layer 12. Optionally, the side of the area on the first cover layer 11 opposite to the non-ink area 122 b on the second cover layer 12 (ie, the overlapping area M) away from the visible area is the side edge of the first cover layer 11 .

[0068] Since the purpose of providing the non-ink area 122b on the non-visible area 122 of the second cover layer 12 is to expose the side area of ​​the first cover layer 11, and the area of ​​the second cover layer 12 is larger than that of the first cover layer 11, within a certain tolerance range, the area of ​​the non-ink area 122b on the second cover layer 12 is not less than the area of ​​the overlapping area M.

[0069] In the flexible display cover provided in the embodiments of the present application, a non-ink area is provided on the side of the second cover layer so that the orthographic projection of the non-ink area on the second cover layer onto the first cover layer overlaps with the first cover layer. This allows direct observation of the bonding between the first and second cover layers, timely detection of cracks in the first cover layer, and avoidance of cutting the first cover layer during subsequent processing. By using the non-ink area on the second cover layer to observe the status of various components in the flexible display cover in real time, more accurate tracking of cutting results can be achieved.

[0070] Optionally, the first cover layer 11 is made of ultra-thin glass, for example, soda-lime glass, aluminosilicate glass, sodium aluminosilicate glass, lithium aluminosilicate glass or phosphorus aluminosilicate glass.

[0071] Optionally, the first cover layer 11 has a size of 0.01 mm to 0.1 mm in the first direction X. For example, the first cover layer 11 has a size of 0.01 mm, 0.03 mm, 0.05 mm, 0.08 mm, 0.1 mm, or any value in the above range.

[0072] Optionally, the second cover layer 12 is made of a material including polyimide (PI) or polyethylene terephthalate (PET).

[0073] Optionally, the size of the second cover layer 12 in the first direction X is 0.01 mm to 0.2 mm. For example, the size of the second cover layer 12 in the first direction X is 0.01 mm, 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, or any value in the above range.

[0074] Optionally, referring to FIG1 , the flexible display cover plate 10 further includes an adhesive layer 13 . The adhesive layer 13 is located between the first cover plate layer 11 and the second cover plate layer 12 .

[0075] Optionally, the adhesive layer 13 may be made of a commonly used adhesive material in flexible display devices. For example, the adhesive layer 13 may be made of an optically clear adhesive (OCA).

[0076] It should be understood that an adhesive layer is required between different film layers to achieve bonding. The adhesive layer may or may not be indicated in the drawings, and it does not constitute a limitation to the present application.

[0077] Optionally, Figure 3 is a schematic structural diagram of another flexible display cover provided in an embodiment of the present application. As shown in Figure 3, the non-visible area 122 on the second cover layer 12 includes a first side region 1221. The first side region 1221 includes a non-ink region 122b. The orthographic projection of the non-ink region 122b within the first side region 1221 onto the first cover layer 11 has a first overlap region M1 with the first cover layer 11. The dimension L1 of the non-ink region 122b within the first side region 1221 in the second direction Y satisfies the following: 0.5 mm ≤ L1 ≤ 20 mm. The dimension L2 of the first overlap region M1 in the third direction Z satisfies the following: 0 < L2 ≤ 1 mm. The second direction Y is the length direction of the first side region 1221, and the third direction Z is the width direction of the first side region 1221. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0078] Optionally, when the first side region 1221 is the longer side region of the second cover layer 12 , the second direction can be regarded as the length direction of the flexible display cover 10 , and the third direction can be regarded as the width direction of the flexible display cover 10 .

[0079] It should be understood that the above-mentioned length and width directions are merely conclusions drawn from the accompanying drawings and the default definitions of length and width in a square, and do not constitute limitations on this application. For example, if the dimension of the second cover layer 12 in the second direction Y is smaller than the dimension in the third direction Z, the second direction Y can also be referred to as the width direction of the second cover layer 12.

[0080] In the embodiment of the present application, when a non-ink area 122b is provided within the first side region 1221 of the second cover layer 12, the size of the non-ink area 122b in the second direction Y is 0.5 mm to 20 mm. The non-ink area 122b of this size allows for timely observation of the condition of the first cover layer 11. Furthermore, the dimension L2 in the third direction Z of the area where the orthographic projection of the non-ink area 122b in the first side region 1221 onto the first cover layer 11 (i.e., the first overlapping area M1) is located satisfies the following requirement: 0 < L2 ≤ 1 mm. In other words, the dimension of the observed first overlapping area M1 in the third direction Z is no greater than 1 mm. This allows for the determination of the specific condition of the first cover layer 11 without affecting its function as a display area due to excessive exposure of the first cover layer 11.

[0081] Optionally, the dimension L1 of the non-ink area 122b on the first side area 1221 of the second cover layer 12 in the second direction Y can be 0.5 mm, 3.5 mm, 10.6 mm, 15 mm, 20 mm, or any value within the aforementioned range. The dimension L2 of the first overlapping area M1 in the third direction Z can be 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1 mm, or any value within the aforementioned range.

[0082] Optionally, Figure 4 is a schematic structural diagram of another flexible display cover provided in an embodiment of the present application. As shown in Figure 4, the non-visible area 122 on the second cover layer 12 also includes a second side area 1222 adjacent to the first side area 1221. The length direction of the second side area 1222 is the third direction Z, and the width direction of the second side area 1222 is the second direction Y. The second side area 1222 includes a non-ink area 122b. The orthographic projection of the non-ink area 122b within the second side area 1222 on the first cover layer 11 has a second overlapping area M1 with the first cover layer 11. The dimension L3 of the non-ink area 122b within the second side area 1222 in the third direction Z satisfies the following: 0.5 mm ≤ L3 ≤ 20 mm. The dimension L4 of the second overlapping area M2 in the second direction Y satisfies the following: 0 < L4 ≤ 1 mm.

[0083] In the embodiment of the present application, when a non-ink area 122b is provided within the second side region 1222 of the second cover layer 12, the size of the non-ink area 122b in the third direction Z is 0.5 mm to 20 mm. The condition of the first cover layer 11 can be observed promptly through the non-ink area 122b of this size. Furthermore, the dimension L4 in the second direction Y of the area where the orthographic projection of the non-ink area 122b in the second side region 1222 onto the first cover layer 11 (i.e., the second overlapping area M2) is located satisfies the following requirement: 0 < L2 ≤ 1 mm. That is, the dimension of the observed second overlapping area M2 in the second direction Y is no greater than 1 mm. This allows for the determination of the specific condition of the first cover layer 11 without affecting its function as a display area due to excessive exposure of the first cover layer 11.

[0084] Optionally, a dimension L3 of the non-ink area 122b on the second side area 1222 of the second cover layer 12 in the third direction Z can be 0.5 mm, 5 mm, 10.2 mm, 16 mm, 20 mm, or any value within the aforementioned range. A dimension L4 of the second overlapping area M2 in the second direction Y can be 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1 mm, or any value within the aforementioned range.

[0085] It should be understood that the dimensions of the second cover layer 12 in the second direction Y and the third direction X are generally 50-500 mm, and the dimensions of the non-ink area 122b in the second direction Y and the third direction Y are as described above. Therefore, the drawings of this application only enlarge the size of the non-ink area 122b to show the non-ink area 122b, and the drawings are not used to impose any limitations on the actual product.

[0086] Alternatively, referring to FIG. 3 or FIG. 4 , the second cover layer 12 has four side regions. The non-ink region on the side region opposite the first side region 1221 can be arranged in the same manner as the non-ink region on the first side region 1221 , and the non-ink region on the side region opposite the second side region 1222 can be arranged in the same manner as the non-ink region on the second side region 1222 . This embodiment of the present application will not be further described herein.

[0087] Alternatively, Figure 5 is a schematic diagram of the structure of another flexible display cover provided in an embodiment of the present application. As shown in Figure 5, the first side region 1221 of the second cover layer 12 includes multiple non-ink areas 122b. The multiple non-ink areas 122b within the first side region 1221 are arranged at equal intervals along the second direction Y.

[0088] The multiple non-ink areas 122b in the first side area 1221 are arranged at equal intervals along the second direction Y, which means that the distance between two adjacent non-ink areas 122b in the multiple non-ink areas 122b is equal.

[0089] In the embodiment of the present application, by arranging a plurality of non-ink areas 122 b at equal intervals in the same side area of ​​the second cover layer 12 , the situation of the first cover layer 11 can be observed more comprehensively.

[0090] Optionally, the ratio of the total size of the multiple non-ink areas 122b in the first side area 1221 of the second cover layer 12 in the second direction Y to the length of the first side area 1221 is in a range of 0.1 to 0.5. For example, the ratio of the total size of the multiple non-ink areas 122b in the first side area 1221 of the second cover layer 12 in the second direction Y to the length of the first side area 1221 can be 0.1, 0.15, 0.25, 0.4, 0.5, or any value within the above ranges.

[0091] In the embodiment of the present application, if too many non-ink areas 122b are set in the side area of ​​the second cover layer 12, they may be seen by the user and affect the user's experience. By setting the length dimension ratio of the non-ink area 122b and the side area where it is located to be 0.1-0.5, the non-ink area 122b can play a corresponding role and can also prevent the user experience from being affected by too many non-ink areas 122b.

[0092] Similarly, the method for setting the non-ink area 122b in the second side area 1222 of the second cover layer 12 can be similar to the method for setting the non-ink area 122b in the first side area 1221. Optionally, the second side area 1222 of the second cover layer 12 includes multiple non-ink areas 122b. The multiple non-ink areas 122b in the second side area 1222 are arranged at equal intervals along the third direction Z.

[0093] Optionally, the ratio of the total size of the plurality of non-ink areas 122b in the second side area 1222 of the second cover layer 12 in the third direction Z to the length of the second side area 1222 is in a range of 0.1 to 0.5.

[0094] Optionally, a non-ink area 122b is provided on the second cover layer 12 at the minimum side distance from the first cover layer 11. It is worth noting that the side distance between the second cover layer 12 and the first cover layer 11 mentioned in the embodiments of the present application refers to the distance between the same sides of the two in the second direction Y or the third direction Z.

[0095] For example, FIG6 is a schematic structural diagram of a flexible display cover provided by another embodiment of the present application. As shown in FIG6, the side edges of the first cover layer 11 are parallel to the side edges of the second cover layer 12, that is, the four side edges of the first cover layer 11 are parallel to the four side edges of the second cover layer 12, and the side edges of the second cover layer 12 have four different side spacings L5, L6, L7, and L8 with the side edges of the first cover layer 11. Referring to FIG6, assuming that L7 is the smallest among L5, L6, L7, and L8, a non-ink area 122b can be provided on the side edge area of ​​the second cover layer 12 with a side spacing of L7 from the first cover layer 11. Similarly, if L6 is the smallest among L5, L6, L7, and L8, a non-ink area 122b can be provided on the side edge area of ​​the second cover layer 12 with a side spacing of L6 from the first cover layer 11.

[0096] For example, Figure 7 is a schematic structural diagram of another flexible display cover provided by another embodiment of the present application. As shown in Figure 7, the side edges of the first cover layer 11 are inclined relative to the side edges of the second cover layer 12, that is, the four side edges of the first cover layer 11 are not parallel to the four side edges of the second cover layer 12, and the side edges of the second cover layer 12 have four different side spacings L9, L10, L11, and L12 with the side edges of the first cover layer 11. Referring to Figure 7, assuming that L7 is the smallest among L9, L10, L11, and L12, a non-ink area 122b can be provided on the side edge area of ​​the second cover layer 12 with a side spacing of L7 from the first cover layer 11. Similarly, if L10 is the smallest among L5, L6, L7, and L8, a non-ink area 122b can be provided on the side edge area of ​​the second cover layer 12 with a side spacing of L10 from the first cover layer 11. It should be understood that the side spacing here refers to the shortest distance between the sides of the first cover plate layer 11 and the second cover plate layer 12 on the same side.

[0097] In the embodiment of the present application, due to the presence of the non-ink area 122b on the second cover layer 12, part of the edge area of ​​the first cover layer 11 (the aforementioned overlapping area M) can be observed. Since the predecessor of the flexible display cover 10 (flexible display cover motherboard) will be cut during the processing of the flexible display cover 10, but it is necessary to ensure that the first cover layer 11 is not cut, the non-ink area 122b is provided at the minimum side distance between the second cover layer 12 and the first cover layer 11, so that the edge area of ​​the first cover layer 11 that is most likely to be cut by mistake can be observed, thereby more accurately observing the situation of the first cover layer 11 during cutting, reducing the risk of the first cover layer 11 being cut by mistake.

[0098] Optionally, the distance between the non-ink area 122b on the second cover layer 12 and the vertex of the second cover layer 12 is less than a predetermined distance. That is, the non-ink area 122b can be provided within the side region of the second cover layer 12, near the vertex of the second cover layer 12. For example, the non-ink area 122b can be provided at a certain distance from the vertex of the second cover layer 12, but the distance must be less than the distance from the non-ink area 122b to the middle of the second cover layer 12. Within a certain tolerance range, the non-ink area 122b on the second cover layer 12 may also include the vertex of the second cover layer 12.

[0099] In the embodiment of the present application, the non-ink area 122b on the second cover layer 12 is used to observe the breakage of the first cover layer 11 and accurately track the subsequent cutting process. Because the apex of the second cover layer 12 is more susceptible to breakage than the center, the non-ink area 122b is provided in the side area of ​​the second cover layer 12 near the apex of the second cover layer 12, which makes it easier to observe the side of the first cover layer 11.

[0100] Optionally, the flexible display cover 10 has a bending area, and the non-ink area 122b on the second cover layer 12 is located in an area other than the bending area. That is, the non-ink area 122b on the second cover layer 12 is arranged to avoid the bending area.

[0101] In the embodiment of the present application, the flexible display cover 10 has a folding function and is provided with a bending area for folding the flexible display cover 10. The shielding structure at the edge of the bending area moves as the flexible display cover 10 bends. By avoiding the bending area, the risk of exposure of the non-ink area 122a can be reduced.

[0102] Alternatively, Figure 8 is a schematic diagram of the structure of another flexible display cover provided in another embodiment of the present application. As shown in Figure 8 , the non-visible area 122 on the second cover layer 12 includes a line-out side region 1223. Line-out side region 1223 is used to connect to the line-out region 21 of the display device. The non-ink region 122b may not be provided within line-out side region 1223.

[0103] In the actual production process of the display device, it is necessary to perform laser cutting on the predecessor of the flexible display cover plate 10 to obtain the flexible display cover plate 10 described in the embodiment of the present application. Such as the laser cutting lines OO', NN' and KK' in Figure 8. In this production process, according to the production requirements of some display devices, a side area of ​​the second cover plate layer 12 needs to be reserved to set the output area 21 of the display device in the corresponding side area (Figure 8 is only a figure showing that the output area 21 is set in the flexible display cover plate 10, and it is actually not a component in the flexible display cover plate 10). This side area is the output side area 1223.

[0104] Optionally, the line-out side area 1223 on the second cover layer 12 may be any side area on the second cover layer 12, for example, the first side area 1221 described above, or other side areas, which is not limited in this embodiment of the present application.

[0105] In the embodiment of the present application, a line-out side edge region 1223 is reserved on the second cover layer 12 for connection to the line-out region 21 of the display device, thereby ensuring normal operation of the display device. Furthermore, since the line-out side edge region 1223 does not need to be cut, the non-ink region 122b can be omitted from the line-out side edge region 1223.

[0106] Optionally, the non-visible area 122 on the second cover layer 12 includes a non-line-outgoing side edge area, and the spacing between the non-line-outgoing side edge area and the side edge of the first cover layer 11 ranges from 0.05 mm to 1 mm. A non-ink area 122b is provided within the non-line-outgoing side edge area. For example, the spacing between the non-line-outgoing side edge area on the second cover layer 12 and the side edge of the first cover layer 11 can be 0.05 mm, 0.06 mm, 0.1 mm, 0.5 mm, 1 mm, or any value within the above ranges.

[0107] It is worth noting that, except for the wire-exiting side regions, all other side regions of the second cover layer 12 are non-wire-exiting side regions. For example, in the flexible display cover 10 shown in FIG8 , all other side regions of the second cover layer 12, except for the wire-exiting side region 1223, are non-wire-exiting side regions. The side spacing L10 between one of the non-wire-exiting side regions and the first cover layer 11 ranges from 0.05 mm to 1 mm.

[0108] It should be understood that the side spacing between the non-line-outgoing side area on the second cover layer 12 and the side of the first cover layer 11 refers to the distance between the side on the side where the non-line-outgoing side area on the second cover layer 12 is located and the side on the first cover layer 11 that is parallel to and on the same side as the side.

[0109] Please continue to refer to Figure 8. During the preparation of the flexible display cover plate 10, the predecessor of the flexible display cover plate 10 is cut along the laser cutting lines OO', NN' and KK'. In order to timely observe whether the first cover plate layer 11 will be cut during laser cutting, a non-ink area 122b can be first set on the second cover plate layer 12, and then the second cover plate layer 12 and the first cover plate layer 11 are bonded, and finally laser cutting is performed. Of course, the embodiment of the present application does not specifically limit these process steps. It should be noted that if the second cover plate layer 12 is obtained by laser cutting, the side area of ​​the second cover plate layer 12 mentioned in the embodiment of the present application refers to the side area of ​​the second cover plate layer 12 after cutting.

[0110] In the embodiment of the present application, the first cover layer 11 is disposed below the second cover layer 12, and the orthographic projection of the second cover layer 12 on the first cover layer 11 completely covers the first cover layer 11. By maintaining a spacing of 0.05 mm to 1 mm between the non-wire-exiting side edge regions of the second cover layer 12 and the side edges of the first cover layer 11, the second cover layer 12 can effectively protect the first cover layer 11.

[0111] Optionally, the shape of the non-ink area 122b on the second cover layer 12 includes at least one of a rectangle, a circle, an ellipse, a diamond, and a trapezoid.

[0112] For example, Figures 9 and 10 are schematic structural diagrams of a flexible display cover provided by another embodiment of the present application. As shown in Figure 9, the shape of the non-ink area 122b on the second cover layer 12 can be an ellipse. Alternatively, as shown in Figure 10, the shape of the non-ink area 122b on the second cover layer 12 can be a trapezoid. Alternatively, as shown in any one of Figures 2 to 8, the shape of the non-ink area 122b on the second cover layer 12 can be a rectangle. The embodiment of the present application does not limit the shape of the non-ink area 122b on the second cover layer 12, as long as it can serve the purpose of observing the first cover layer 11, and a suitable shape can be selected according to actual needs.

[0113] It is worth noting that, in the embodiment of the present application, a non-ink area 122b can be set in one or more side areas of the second cover layer 12. For example, referring to Figure 3, the non-ink area 122b can be set only in one side area of ​​the second cover layer 12. For another example, referring to Figure 4, the non-ink area 122b can be set in two side areas of the second cover layer 12. For another example, referring to Figure 8, the non-ink area 122b can be set in three side areas of the second cover layer 12. For another example, referring to Figure 2, the non-ink area 122b can be set in four side areas of the second cover layer 12. In the actual production process, according to observation needs, the non-ink area 122b can be set at any position in the side area of ​​the second cover layer 12. The embodiment of the present application does not limit the setting position of the non-ink area 122b on the second cover layer 12.

[0114] FIG11 is a flow chart of a method for preparing a flexible display cover provided in an embodiment of the present application. As shown in FIG11 , the method includes the following steps 1101 to 1102 .

[0115] In step 1101, a first cover layer and a second cover layer are stacked along a first direction to obtain a flexible display cover motherboard, wherein the orthographic projection of the second cover layer on the first cover layer completely covers the first cover layer, and the second cover layer includes a visible area and a non-visible area, wherein the non-visible area is located around the visible area, and the non-visible area includes an ink area and a non-ink area, wherein an ink area exists between the non-ink area and the visible area, and the orthographic projection of the non-ink area on the first cover layer overlaps with the first cover layer.

[0116] Optionally, before laminating the first cover layer and the second cover layer along the first direction, an ink layer is formed on the provided cover master, and the ink layer on the cover master is windowed to form ink areas and non-ink areas, thereby obtaining the first cover layer.

[0117] In step 1102, the flexible display cover panel motherboard is cut along a cutting line to obtain a flexible display cover panel, wherein the cutting line is located in a non-visible area and passes through a non-ink area.

[0118] Optionally, the flexible display cover motherboard is cut along cutting lines by laser cutting, and the positions of the cutting lines are, for example, the cutting lines OO', NN' and KK' shown in FIG8 .

[0119] In the method for preparing a flexible display cover provided in an embodiment of the present application, a non-ink area is provided on the side edge of the second cover layer so that the orthographic projection of the non-ink area on the second cover layer onto the first cover layer overlaps with the first cover layer. This allows direct observation of the bonding between the first and second cover layers, timely detection of cracks in the first cover layer, and avoidance of cutting the first cover layer during processing. Real-time observation of the various components of the flexible display cover using the non-ink area on the second cover layer enables more accurate tracking of cutting results.

[0120] The present application also provides a display module comprising the flexible display cover plate 10 described in any of the above embodiments. For example, Figures 12 and 13 are schematic structural diagrams of a display module provided in an embodiment of the present application. Figure 12 is a schematic cross-sectional view of the display module shown in Figure 13 along the BB' direction. As shown in Figure 12, the display module 00 comprises the flexible display cover plate 10 shown in Figure 1. As shown in Figure 13, the display module 00 comprises the flexible display cover plate 10 shown in Figure 2.

[0121] Optionally, the display module 00 further includes a display substrate 30. Continuing with Figure 12 , the flexible display cover 10 is disposed on the display substrate 30, with the first cover layer 11 of the flexible display cover 10 being bonded to the display substrate 30 on a side facing away from the second cover layer 12. Optionally, the flexible display cover 10 and the display substrate 30 are secured together by an adhesive layer 31.

[0122] Optionally, referring to FIG12 , the display substrate 30 includes a display layer 32 and a film 33 . The display layer 32 includes an active area (AA) 321 .

[0123] Optionally, please continue to refer to FIG. 13 , which shows that the substrate 30 further includes a wire outlet area 21 .

[0124] The embodiment of the present application further provides a display device, comprising the display module 30 described in any of the above embodiments. The display device may be, for example, an organic light-emitting diode (OLED) display.

[0125] Optionally, the product form of the above-mentioned display device includes but is not limited to: computer monitors, televisions, billboards, laser printers with display functions, telephones, mobile phones, personal digital assistants (PDAs), laptop computers, digital cameras, camcorders, viewfinders, vehicles, large-area walls, theater screens or stadium signs, etc.

[0126] 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.

[0127] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0128] The present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any embodiments having substantially the same structure and effect as the technical concept within the scope of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the present application, other methods of constructing the embodiments by applying various modifications that can be imagined by those skilled in the art and combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A flexible display cover, comprising: A first cover plate layer (11) and a second cover plate layer (12) are stacked along a first direction (X), wherein an orthographic projection of the second cover plate layer (12) on the first cover plate layer (11) completely covers the first cover plate layer (11); The second cover plate layer (12) comprises a visible area (121) and a non-visible area (122), wherein the non-visible area (122) is located around the visible area (121), and the non-visible area (122) comprises an ink area (122a) and a non-ink area (122b); The ink area (122a) exists between the non-ink area (122b) and the visible area (121), and the orthographic projection of the non-ink area (122b) on the first cover layer (11) has an overlapping area (M) with the first cover layer (11).

2. According to the flexible display cover plate of claim 1, the non-visible area (122) comprises a first side area (1221), the first side area (1221) comprises the non-ink area (122b), and the orthographic projection of the non-ink area (122b) in the first side area (1221) on the first cover plate layer (11) has a first overlapping area (M1) with the first cover plate layer (11); The dimension L1 of the non-ink area (122b) in the first side area (1221) in the second direction (Y) satisfies: 0.5 mm ≤ L1 ≤ 20 mm, and the dimension L2 of the first overlap area (M1) in the third direction (Z) satisfies: 0 < L2 ≤ 1 mm; in, The second direction (Y) is the length direction of the first side area (1221), the third direction (Z) is the width direction of the first side area (1221), and the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other.

3. According to the flexible display cover plate of claim 2, the first side area (1221) includes a plurality of the non-ink areas (122b), and the plurality of the non-ink areas (122b) in the first side area (1221) are arranged at equal intervals along the second direction (Y).

4. According to the flexible display cover plate of claim 3, the ratio of the total size of the plurality of non-ink areas (122b) within the first side area (1221) in the second direction (Y) to the length of the first side area (1221) ranges from 0.1 to 0.

5.

5. According to any one of claims 2 to 4, the non-visible area (122) further comprises a second side area (1222) adjacent to the first side area (1221), the length direction of the second side area (1222) is the third direction (Z), the width direction of the second side area (1222) is the second direction (Y), the second side area (1222) comprises the non-ink area (122b), and the orthographic projection of the non-ink area (122b) in the second side area (1222) on the first cover plate layer (11) has a second overlapping area (M2) with the first cover plate layer (11); The dimension L3 of the non-ink area (122b) in the second side area (1222) in the third direction (Z) satisfies: 0.5 mm ≤ L3 ≤ 20 mm, and the dimension L4 of the second overlapping area (M2) in the second direction (Y) satisfies: 0<L4 ≤ 1 mm.

6. According to the flexible display cover plate of claim 5, the second side edge area (1222) includes a plurality of the non-ink areas (122b), and the plurality of the non-ink areas (122b) in the second side edge area (1222) are arranged at equal intervals along the third direction (Z).

7. According to the flexible display cover plate of claim 6, the ratio of the total size of the plurality of non-ink areas (122b) within the second side area (1222) in the third direction (Z) to the length of the second side area (1222) is in the range of 0.1 to 0.

5.

8. According to the flexible display cover plate according to any one of claims 1 to 7, the non-ink area (122b) is provided on the second cover plate layer (12) at the minimum side distance from the first cover plate layer (11).

9. According to any one of claims 1 to 8, the flexible display cover plate, the distance from the non-ink area (122b) to the vertex of the second cover plate layer (12) is less than a preset distance.

10. The flexible display cover according to any one of claims 1 to 9, wherein the flexible display cover has a bending area, and the non-ink area (122b) is located in other areas outside the bending area.

11. The flexible display cover according to any one of claims 1 to 10, wherein the non-visible area (122) comprises a line-out side edge area (1223), and the line-out side edge area (1223) is used to connect to a line-out area of ​​a display device.

12. According to any one of claims 1 to 11, the non-visible area (122) includes a non-line side area, the side spacing between the non-line side area and the first cover layer (11) is in the range of 0.05 mm to 1 mm, and the non-ink area (122b) is arranged in the non-line side area.

13. The flexible display cover plate according to any one of claims 1 to 12, further comprising an adhesive layer (13), wherein the adhesive layer (13) is located between the first cover plate layer (11) and the second cover plate layer (12).

14. According to any one of claims 1 to 13, the shape of the non-ink area (122b) comprises at least one of a rectangle, a circle, an ellipse, a diamond, and a trapezoid.

15. According to any one of claims 1 to 14, the flexible display cover plate, the first cover plate layer (11) is made of ultra-thin glass.

16. A method for preparing a flexible display cover, comprising: A first cover plate layer and a second cover plate layer are stacked along a first direction to obtain a flexible display cover plate motherboard, wherein an orthographic projection of the second cover plate layer on the first cover plate layer completely covers the first cover plate layer, the second cover plate layer comprises a visible area and a non-visible area, the non-visible area is located around the visible area, the non-visible area comprises an ink area and a non-ink area, wherein the ink area is between the non-ink area and the visible area, and an orthographic projection of the non-ink area on the first cover plate layer overlaps with the first cover plate layer; The flexible display cover plate motherboard is cut along a cutting line to obtain a flexible display cover plate, wherein the cutting line is located in the non-visible area and passes through the non-ink area.

17. The preparation method according to claim 16, before laminating the first cover plate layer and the second cover plate layer along the first direction, the method further comprises: Provide cover motherboard; forming an ink layer on the cover plate master; The ink layer on the cover board master is windowed to form the ink area and the non-ink area, thereby obtaining the first cover board layer.

18. A display module, comprising the flexible display cover plate (10) according to any one of claims 1 to 15.

19. The display module according to claim 18, further comprising a display substrate (30); The flexible display cover plate (10) is arranged on the display substrate (30), and a surface of the first cover plate layer (11) in the flexible display cover plate (10) away from the second cover plate layer (12) is bonded to the display substrate (30).

20. A display device comprising the display module according to claim 18 or 19.

Images