Display screen cover plate, display screen and display device

Abstract

The invention provides a display screen cover plate, a display screen and a display device. The display screen cover plate comprises a cover plate body and a shielding layer, the cover plate body is provided with a display area and a shielding area, and the shielding area surrounds the display area; the shielding layer is located in the shielding area and located on the binding face of the cover plate body, and the shielding layer comprises a first sub-shielding layer and a second sub-shielding layer which are sequentially stacked on the binding face in the direction away from the binding face. The inner edge of the second sub-shielding layer retracts in the direction away from the display area relative to the inner edge of the first sub-shielding layer to form a step structure, the inner edge of the second sub-shielding layer is provided with a plurality of notches, and the notches are arranged in the extending direction of the inner edge of the second sub-shielding layer. The attaching bubbles between the display screen cover plate and the display panel can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and particularly to a display screen cover plate, a display screen, and a display device. Background Art

[0002] A display screen is an important component of an electronic device. Generally, a display screen includes a display screen cover plate and a display panel, and the display screen cover plate and the display panel are adhered together through a transparent adhesive layer.

[0003] In the related art, the display screen cover plate includes a cover plate body and a shielding layer. The cover plate body has a display area and a shielding area, and the shielding area surrounds the display area. The shielding layer is located in the shielding area and on the bonding surface of the cover plate body, that is, the surface of the cover plate body that is bonded to the display panel.

[0004] However, when the display panel and the display screen cover plate are adhered through the adhesive layer, air bubbles are likely to appear in the overlapping area between the shielding layer and the adhesive layer, resulting in defects in the display screen. Summary of the Invention

[0005] Embodiments of the present disclosure provide a display screen cover plate, a display screen, and a display device, which can improve the bonding air bubbles during the bonding process of the display screen cover plate and the display screen. The technical solutions are as follows:

[0006] In a first aspect, a display screen cover plate is provided, including a cover plate body and a shielding layer; the cover plate body has a display area and a shielding area, and the shielding area surrounds the display area; the shielding layer is located in the shielding area and on the bonding surface of the cover plate body, and the shielding layer includes a first sub-shielding layer and a second sub-shielding layer that are sequentially stacked on the bonding surface in a direction away from the bonding surface, and the inner edge of the second sub-shielding layer is indented in a direction away from the display area relative to the inner edge of the first sub-shielding layer, forming a stepped structure, and the inner edge of the second sub-shielding layer has a plurality of notches, and the plurality of notches are arranged along the extending direction of the inner edge of the second sub-shielding layer.

[0007] Optionally, every two adjacent notches define a protrusion on the inner edge of the second sub-shielding layer, and the projection of the protrusion on the surface of the first sub-shielding layer away from the bonding surface is triangular, trapezoidal, arc-shaped, or rectangular.

[0008] Optionally, at least two adjacent protrusions are connected.

[0009] Optionally, the projection of the protrusion on the surface of the first sub-shielding layer away from the bonding surface is trapezoidal, the length of the upper base of the trapezoid is 0.2 ± 0.1 mm, the length of the lower base of the trapezoid is 0.5 ± 0.1 mm, and the height of the trapezoid is 0.18 ± 0.1 mm.

[0010] Optionally, the top surface of the protrusion is an inclined surface. The top surface of the protrusion is the surface of the protrusion away from the fitting surface, and the thickness of the side of the top surface of the protrusion close to the inner edge of the first sub-blocking layer is less than the thickness of the side away from the inner edge of the first sub-blocking layer.

[0011] Optionally, the cover plate body includes a flat portion and a bent portion. The bent portion surrounds the flat portion and is connected to the edge of the flat portion. The shielding area is located in the bent portion, and the plurality of notches are located in the bent portion.

[0012] Optionally, the bent portion includes a plurality of single-fold areas and a plurality of double-fold areas. Each double-fold area is located between two adjacent single-fold areas and is connected to the two adjacent single-fold areas. The plurality of notches are located in at least one of the double-fold areas.

[0013] Optionally, the second sub-blocking layer has exhaust holes. The exhaust holes are located in at least one of the single-fold areas. The exhaust holes extend from the inner edge of the second sub-blocking layer in a direction away from the display area, and the distance between one end of the exhaust hole close to the outer edge of the second sub-blocking layer and the outer edge of the second sub-blocking layer is greater than 0.

[0014] Optionally, two exhaust holes are provided on one side of each double-fold area. The width of the exhaust hole is 0.1 mm - 0.2 mm, and the distance between the two exhaust holes is 10 mm - 20 mm.

[0015] Optionally, the second sub-blocking layer has a groove. The opening of the groove is located on the surface of the second sub-blocking layer away from the first sub-blocking layer.

[0016] Optionally, the second sub-blocking layer has a plurality of the grooves, such that the second sub-blocking layer has a grid structure.

[0017] Optionally, the width of the groove is 0.2 ± 0.1 mm, and the distance between adjacent grooves is 0.4 ± 0.1 mm.

[0018] In a second aspect, a display screen is provided. The display screen includes a display panel, a display screen cover plate, and an adhesive layer. The adhesive layer is located between the fitting surface of the display screen cover plate and the display panel. The display screen cover plate is any one of the foregoing display screen cover plates.

[0019] Optionally, the adhesive layer is an optically transparent adhesive layer. The surface of the adhesive layer opposite to the display screen cover plate has an air storage groove. The air storage groove is located between the arc-forming area of the cover plate body and the inner edge of the first sub-blocking layer.

[0020] Optionally, the width of the air storage groove is 0.2±0.1 mm, and the depth of the air storage groove is 0.05±0.05 mm.

[0021] Optionally, the air storage groove is arranged along a part of the edge of the cover plate body, and the extending direction of the air storage groove matches the extending direction of the edge of the cover plate body where it is located.

[0022] In a third aspect, a display device is provided, which includes: a power supply and any one of the foregoing display screens, and the power supply is electrically connected to the display screen.

[0023] The beneficial effects brought by the technical solutions provided by the embodiments of the present disclosure are:

[0024] In the embodiments of the present disclosure, when bonding the display screen cover plate and the display panel through an adhesive layer, a plurality of notches provided at the inner edge of the second sub-blocking layer can, on the one hand, facilitate the entry of gas above the stepped structure, so that the gas can be discharged through other processes subsequently, thereby reducing bubbles; on the other hand, it can reduce the extrusion stress on the adhesive layer in the overlapping area between the second sub-blocking layer and the adhesive layer, thereby reducing the rebound force of the adhesive layer, and further reducing the bubbles generated due to the rebound force. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a top view structural schematic diagram of a display screen cover plate provided by an embodiment of the present disclosure;

[0027] Figure 2 It is a partial enlarged structural schematic diagram of the display screen cover plate provided by an embodiment of the present disclosure;

[0028] Figure 3 is Figure 2 The cross-sectional structural schematic diagram of the display screen cover plate in along the line A-A;

[0029] Figure 4 It is an enlarged structural schematic diagram of the inner edge of the second sub-blocking layer provided by an embodiment of the present disclosure;

[0030] Figure 5 is Figure 2 Another cross-sectional structural schematic diagram of the display screen cover plate in along the line A-A;

[0031] Figure 6It is a partially enlarged structural schematic diagram of another display screen cover plate provided by an embodiment of the present disclosure;

[0032] Figure 7 It is Figure 6 a sectional structural schematic diagram of the display screen cover plate in along line B-B;

[0033] Figure 8 It is Figure 6 an enlarged structural schematic diagram of the exhaust hole in ;

[0034] Figure 9 It is a partially enlarged structural schematic diagram of yet another display screen cover plate provided by an embodiment of the present disclosure;

[0035] Figure 10 It is Figure 9 a sectional structural schematic diagram of the display screen cover plate in along line C-C;

[0036] Figure 11 It is a structural schematic diagram of a display screen provided by an embodiment of the present disclosure;

[0037] Figure 12 It is Figure 11 a schematic diagram of the positional relationship between the display screen cover plate and the adhesive layer in ;

[0038] Figure 13 It is Figure 12 a sectional structural schematic diagram of the display screen cover plate and the adhesive layer in along line D-D;

[0039] Figure 14 It is a flow schematic diagram of a manufacturing method of a display screen cover plate provided by an embodiment of the present disclosure;

[0040] Figure 15 It is a top view structural schematic diagram of a laminating tool provided by an embodiment of the present disclosure;

[0041] Figure 16 It is Figure 15 a side view structural schematic diagram of the laminating tool in .

[0042] Reference numerals

[0043] Display screen cover plate 1; Display panel 2; Adhesive layer 3;

[0044] Cover plate body 10; Display area 10a; Masking area 10b;

[0045] Blocking layer 20;

[0046] First sub-blocking layer 21; Inner edge 21a of the first sub-blocking layer; Outer edge 21b of the first sub-blocking layer;

[0047] Second sub-blocking layer 22; Inner edge 22a of the second sub-blocking layer; Outer edge 22b of the second sub-blocking layer;

[0048] Notch 221; protrusion 222; exhaust hole 223; groove 224;

[0049] Air storage groove 31. Specific embodiments

[0050] To make the objectives, technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0051] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", "third" and similar terms used in the specification and claims of the present patent application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms "a" or "an" and the like do not denote a limitation of quantity, but mean that there is at least one. The terms "comprising" or "including" and the like mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms "connected" or "coupled" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", "top", "bottom" and the like are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0052] In the related art, a display screen cover plate includes a cover plate body and a shielding layer. The cover plate body has a display area and a shielding area, and the shielding area surrounds the display area. The shielding layer is located in the shielding area and on the bonding surface of the cover plate body. The shielding layer includes a first sub-shielding layer and a second sub-shielding layer stacked in sequence in a direction away from the bonding surface. The inner edge of the second sub-shielding layer is retracted inward in a direction away from the display area relative to the inner edge of the first sub-shielding layer, forming a stepped structure. The shape of the inner edge of the second sub-shielding layer is substantially the same as the shape of the inner edge of the first sub-shielding layer.

[0053] When bonding the display panel and the display screen cover plate through an adhesive layer, air bubbles are likely to appear in the overlapping area between the second sub-shielding layer and the adhesive layer, resulting in defects in the display screen.

[0054] To this end, the embodiments of the present disclosure provide a display screen cover plate, which improves the air bubbles in the process of bonding the display panel and the display screen cover plate by providing a notch at the inner edge of the second sub-shielding layer.

[0055] Figure 1 It is a schematic structural diagram of a display screen cover plate provided by an embodiment of the present disclosure. AsFigure 1 As shown, the display screen cover plate 1 includes a cover plate body 10 and a shielding layer 20. The cover plate body 10 has a display area 10a and a shielding area 10b, and the shielding area 10b surrounds the display area 10a. The shielding layer 20 is located in the shielding area 10b and on the fitting surface of the cover plate body 10. The shielding layer 20 is arranged around the display area 10a to prevent light leakage.

[0056] Figure 2 is Figure 1 a partial enlarged structural schematic diagram of the display screen cover plate in, showing Figure 1 the structure at the upper left corner of the display screen cover plate in. Figure 3 is Figure 2 a structural schematic diagram of the display screen cover plate along line A-A in. Combining Figure 2 and Figure 3 , the shielding layer 20 includes a first sub-shielding layer 21 and a second sub-shielding layer 22 that are sequentially stacked on the fitting surface in a direction away from the fitting surface. The inner edge 22a of the second sub-shielding layer 22 is indented in a direction away from the display area relative to the inner edge 21a of the first sub-shielding layer 21, forming a stepped structure 23. The inner edge 22a of the second sub-shielding layer 22 has a plurality of notches 221, and the plurality of notches 221 are arranged along the extending direction of the inner edge 22a of the second sub-shielding layer 22.

[0057] Wherein, the fitting surface of the cover plate body 10 refers to the surface of the cover plate body 10 that fits with the display panel.

[0058] In the embodiment of the present disclosure, when bonding the display screen cover plate and the display panel through an adhesive layer, the plurality of notches provided at the inner edge of the second sub-shielding layer can, on the one hand, facilitate the entry of gas above the stepped structure, so that the gas can be discharged through other processes subsequently, thereby reducing bubbles; on the other hand, it can reduce the extrusion stress on the adhesive layer in the overlapping area between the second sub-shielding layer and the adhesive layer, thereby reducing the rebound force of the adhesive layer, and further reducing the bubbles generated due to the rebound force. In addition, since a plurality of notches are provided at the inner edge of the second sub-shielding layer, the attachment area between the adhesive layer and the shielding layer is increased, which can improve the fitting effect, and at the same time improve the adhesion and durability of the shielding layer.

[0059] Optionally, the distance S1 between the inner edge 21a of the first sub-shielding layer 21 and the inner edge 22a of the second sub-shielding layer 22 is 0.18 ± 0.1 mm.

[0060] Optionally, the outer edge 21b of the first sub-shielding layer 221 is flush with the outer edge 22b of the second sub-shielding layer 22.

[0061] Optionally, both the first sub-shielding layer 21 and the second sub-shielding layer 22 are ink layers. When implemented, the first sub-shielding layer 21 and the second sub-shielding layer 22 can be formed on the fitting surface of the cover plate body 10 by printing or the like.

[0062] Optionally, the thickness of the first sub-blocking layer 21 is 1 μm - 10 μm, and the thickness of the second sub-blocking layer 22 is 1 μm - 10 μm.

[0063] Optionally, the cover plate body 10 can be a plate body made of a transparent material such as a glass plate or a plastic plate.

[0064] In order to obtain a better visual experience and a more comfortable holding feeling, the application of curved display screens is becoming more and more widespread. During the fitting process of a curved display screen, due to the bending of the display screen cover plate, the problem of fitting bubbles is more serious. Therefore, the display screen cover plate in the embodiments of the present disclosure can be the cover plate of a curved display screen.

[0065] Optionally, the display screen cover plate can be a four-curved screen cover plate or a double-curved screen cover plate. Since the process of the cover plate body of the four-curved screen cover plate is more complex, the cost is higher and the problem of bubbles is more likely to occur. Therefore, in the embodiments of the present disclosure, the four-curved screen cover plate is taken as an example for illustration.

[0066] Refer to again Figure 1 , the cover plate body 10 includes a flat portion 11 and a bent portion 12. The bent portion 12 surrounds the flat portion 11 and is connected to the edge of the flat portion 11. The boundary line between the flat portion 11 and the bent portion 12 is the arc starting area 13. The shielding area 10b is located in the bent portion 12, that is, the blocking layer 20 is located in the bent portion 12.

[0067] The bent portion 12 includes four single-fold areas 12a and four double-fold areas 12b. The four single-fold areas 12a are respectively located at the top side, bottom side and two side edges of the cover plate body 10a. Each double-fold area 12b is located between two adjacent single-fold areas 12a and is connected to the two adjacent single-fold areas 12a. In the embodiments of the present disclosure, the single-fold area 12a refers to an area bent in one direction. For example, the left single-fold area 12a is bent in a direction perpendicular to the paper surface. The double-fold area 12b refers to an area with two bending directions. For example, the upper left double-fold area 12b is bent both in a direction perpendicular to the paper surface and in a direction parallel to the paper surface.

[0068] In the embodiments of the present disclosure, the plurality of notches 221 can be located in the entire bent portion 12 or in a partial area of the bent portion 12. When the display screen cover plate is attached to the display panel, the overlapping area between the blocking layer and the adhesive layer at the bent portion is more likely to generate bubbles. Therefore, notches need to be provided in the bent portion to reduce the generation of bubbles.

[0069] In the embodiments of the present disclosure, a plurality of notches 221 are arranged in each double-fold area 12b. It should be noted that, in other embodiments, only some of the double-fold areas 12b may be provided with a plurality of notches 221. That is, the notches 221 are located in at least one double-fold area 12b. The possibility of generating bubbles in the double-fold area is higher. Therefore, arranging the notches in the double-fold area is more conducive to improving the fitting bubbles.

[0070] Since the possibility of generating bubbles in the single-fold area 12a is relatively small, the notches 221 may not be provided, or only some areas may be provided with notches 221. For example, notches may be provided at positions close to the double-fold area 12b.

[0071] It should be noted that Figure 1 in, the outer contour of the cover plate body 10 is a rounded rectangle. In other embodiments, the outer contour shape of the cover plate body 10 may be set according to actual needs, such as a circle, etc.

[0072] Figure 4 is an enlarged structural schematic diagram of the inner edge of the second sub-blocking layer provided in the embodiments of the present disclosure. As Figure 4 shown, each adjacent two notches 221 define a protrusion 222 on the inner edge of the second sub-blocking layer 22, and the projection of the protrusion 222 on the surface of the first sub-blocking layer 21 away from the fitting surface is trapezoidal.

[0073] When the protrusion 222 is trapezoidal, when the display screen cover plate is attached to the display panel through an adhesive layer, the attachment area of the adhesive layer to the first sub-blocking layer and the second sub-blocking layer increases, which can not only improve the fitting effect, reduce bubbles, but also improve the adhesion and durability of the ink.

[0074] It should be noted that Figure 4 taking the projection of the protrusion on the surface of the second sub-blocking layer away from the fitting surface as trapezoidal as an example for illustration. In implementation, a protrusion with a suitable shape can be selected according to needs, such as a triangle, a trapezoid, an arc, or a rectangle, etc.

[0075] Optionally, at least two adjacent protrusions 222 are connected. For example, Figure 2 in, the lower bases of two adjacent trapezoids are connected.

[0076] When the adjacent protrusions are connected, with a certain protrusion size, the number of notches can be large and evenly distributed, which is beneficial to further reduce bubbles in the case where the occurrence position of the in-plane fitting bubbles is uncertain.

[0077] Optionally, the length L1 of the upper base of the trapezoid is 0.2 ± 0.1 mm, the length L2 of the lower base of the trapezoid is 0.5 ± 0.1 mm, and the height H1 of the trapezoid is 0.18 ± 0.1 mm.

[0078] The trapezoid designed according to this size can increase the attachment area between the shielding layer and the bonding layer, improve the bonding effect, and at the same time enhance the adhesion and durability of the shielding layer. Moreover, the notches can be evenly arranged in the area where bubbles may appear. In this way, no matter where the bubbles appear, they can be guided above the step structure through these notches.

[0079] Combined with Figure 3 , the top surface of the protrusion 222 is a flat surface, and the top surface of the protrusion 222 is the surface of the protrusion far from the bonding surface.

[0080] Figure 5 is another schematic structural view of the display screen cover plate shown in the figure along the line A-A. As Figure 5 shown, optionally, the top surface of the protrusion 222 is an inclined surface, and the thickness of the side of the top surface of the protrusion 222 close to the inner edge 21a of the first sub-shielding layer 21 is less than the thickness of the side of the top surface of the protrusion far from the inner edge 21a of the first sub-shielding layer 21.

[0081] Designing the top surface of the protrusion as an inclined surface makes it more convenient to guide the bubbles above the step structure and facilitate the discharge of gas. In implementation, the notches and protrusions can be formed by the relief printing process.

[0082] Figure 6 is a partially enlarged schematic structural view of another display screen cover plate provided by an embodiment of the present disclosure. Different from the Figure 2 display screen cover plate shown, the second sub-shielding layer 22 has exhaust holes 223, and the exhaust holes 223 are located in at least one single-fold area 12a.

[0083] Figure 7 is Figure 6 the cross-sectional structural view of the display screen cover plate along the line B-B in Figure 7 shown. As shown, the exhaust holes 223 extend from the inner edge 22a of the second sub-shielding layer 22 in a direction away from the display area 10a, and the distance between one end of the exhaust holes 223 close to the outer edge 22b of the second sub-shielding layer 22 and the outer edge 22b of the second sub-shielding layer 22 is greater than 0.

[0084] The exhaust holes extend from the inner edge of the second sub-shielding layer in a direction away from the display area. In this way, the in-plane compressed gas generated during the bonding process can be guided to the exhaust holes through the step structure, and the gas is accommodated in the exhaust holes, which can further reduce the bubbles generated between the bonding surface and the bonding layer. Moreover, the distance between one end of the exhaust holes 223 close to the outer edge of the second sub-shielding layer 22 and the outer edge of the second sub-shielding layer 22 is greater than 0, that is, one end of the exhaust holes 223 is closed, so as to prevent external air from entering between the display screen cover plate and the display panel.

[0085] In some examples, two exhaust holes 223 are provided on one side of each double-fold area 12a. Figure 8 Yes Figure 6 It is a schematic enlarged structure diagram of the exhaust hole 223 corresponding to the double-fold area 12a. As Figure 8 shown, the width W1 of each exhaust hole 223 is 0.1 mm - 0.2 mm, and the distance D1 between the two exhaust holes 223 is 10 mm - 20 mm.

[0086] Generally, the diameter of the bubble is 0.01 mm - 0.02 mm, and the estimated volume of a single bubble is 8×10 -5 mm 3 . And the volume of the exhaust hole designed according to this size is 3.6×10 -3 mm 3 , which can accommodate multiple bubbles and is sufficient to meet the exhaust requirements during the lamination process. Moreover, by setting the exhaust hole according to this size, it is possible to prevent foreign particles from entering due to the oversized exhaust hole.

[0087] Exemplarily, the exhaust hole 223 can be set at a position close to the bending line 12c of the single-fold area 12a where it is located. The bending line 12c refers to the position where the side where the single-fold area 12a is located starts to bend, that is, the boundary line between the adjacent single-fold area 12a and double-fold area 12b. For example, the distance between the exhaust hole 223 closest to the bending line 12c of the single-fold area 12a where it is located and the bending line 12c can be 10 ± 1 mm. In this way, the exhaust hole 223 is closer to the double-fold area 12b, facilitating the entry of gas into the exhaust hole.

[0088] In implementation, for a four-curved screen, the exhaust holes corresponding to the two upper double-fold areas can be set in the single-fold area of the top edge, and the exhaust holes corresponding to the two lower double-fold areas can be set in the single-fold area of the bottom edge.

[0089] Exemplarily, as Figure 6 shown, a plurality of notches 221 are not only located in the double-fold area 12b, but also located in the part of the single-fold area 12a close to the double-fold area 12b, and the opening of the exhaust hole 223 is located between two adjacent protrusions 222.

[0090] In other embodiments, a plurality of notches 221 can be only located in the double-fold area 12b and not in the single-fold area 12a.

[0091] Figure 9 It is a partial enlarged structure diagram of another display screen cover plate provided by an embodiment of the present disclosure. As Figure 9 shown, the second sub-blocking layer 22 has a groove 224, and the opening of the groove 224 is located on the surface of the second sub-blocking layer 22 away from the first sub-blocking layer 21.

[0092] During the process of bonding the display screen cover plate to the display panel, the bonding layer will be subjected to extrusion stress from the bonding tool. When the bonding layer is an OCA layer or a film layer made of other materials with large anti-elastic deformation and large modulus, rebound bubbles are likely to occur at the bonding part where the bonding layer overlaps with the shielding layer. And the groove 224 can provide space for the deformation and displacement of the bonding layer material, thereby releasing a part of the extrusion stress during the bonding process and reducing the generation of rebound bubbles.

[0093] Optionally, the depth of the groove 224 can be less than or equal to the thickness of the second sub-shielding layer 22.

[0094] Optionally, there are multiple grooves 224 in the second sub-shielding layer 22, and these multiple grooves 224 make the second sub-shielding layer in a grid structure.

[0095] In this way, the overall extrusion stress during the bonding process is dispersed to each grid line of the grid structure, and a part of the concentrated extrusion stress is released through the grid gaps and the bosses, thereby reducing the rebound bubbles caused by the relatively large local extrusion stress.

[0096] Figure 10 Yes Figure 9 The structural schematic diagram of the display screen cover plate along the C-C line is shown. As Figure 10 shown, optionally, the width W2 of the groove 224 is 0.2±0.1 mm, and the distance D2 between adjacent grooves 224 is 0.4±0.1 mm. For the grid structure with this size, the stress dispersion effect is better.

[0097] The present disclosure embodiment does not limit the shape of the groove 224, and it can be limited according to actual needs, such as being rectangular, oval, circular, polygonal or irregular in shape, etc.

[0098] Figure 11 This is the structural schematic diagram of a display screen provided by the embodiment of the present disclosure. As Figure 11 shown, the display screen includes a display panel 2, a display screen cover plate 1, and a bonding layer 3. The bonding layer 3 is located between the bonding surface of the display screen cover plate 1 and the display panel 2, and the display screen cover plate 1 is any one of the foregoing display screen cover plates.

[0099] In the embodiment of the present disclosure, the display panel 2 can be any type of display panel, including but not limited to an organic light emitting diode (OLED) display panel, etc.

[0100] Optionally, the bonding layer 3 is an optical clear adhesive (OCA) layer.

[0101] Figure 12 Yes Figure 11Partial top view structural schematic diagram of the display screen in Figure 13 is Figure 12 Cross-sectional structural schematic diagram of the display screen cover plate and the adhesive layer along the D-D line. As Figure 12 and 13 shown, the surface of the adhesive layer 3 opposite to the display screen cover plate 1 has an air storage groove 31, and the air storage groove 31 is located between the arc starting area 13 of the cover plate body 10 and the inner edge 21a of the first sub-blocking layer 21.

[0102] Judging from actual production experience, most of the in-plane bubbles within the arc starting area of the cover plate body can be eliminated through a defoaming process such as an ultraviolet light defoaming process, while the bubbles outside the arc starting area of the cover plate body are difficult to eliminate. In the case where an air storage groove is provided, the gas that cannot be released during the lamination process can enter the air storage groove, so that the air that cannot be discharged will not cause arching in the Z direction (i.e., the thickness direction of the display screen) to form bubbles after lamination. Moreover, the area between the arc starting area of the cover plate body and the inner edge of the first sub-blocking layer is close to the overlapping area of the adhesive layer and the blocking layer, and bubbles are likely to be generated. Setting the air storage groove between the arc starting area of the cover plate body and the inner edge of the first sub-blocking layer can better improve the bubble problem during lamination.

[0103] Exemplarily, the distance S3 between the outer edge of the air storage groove 31 and the inner edge 21a of the first sub-blocking layer 21 is 0.5±0.1 mm.

[0104] Optionally, the width of the air storage groove 31 is 0.2±0.1 mm, and the depth of the air storage groove 31 is 0.05±0.05 mm.

[0105] It is found through experiments that the air storage groove of this size is sufficient to accommodate the in-plane bubbles generated during the lamination process and has little impact on the lamination effect.

[0106] Optionally, the air storage groove 31 is provided along a part of the edge of the cover plate body 10, and the extending direction of the air storage groove 31 matches the extending direction of the edge of the cover plate body 10 where it is located. For example, the outer contour of the cover plate body 10 is a rounded rectangle, and the air storage groove 31 is provided at the four rounded corners of the rounded rectangle, and the extending direction of the air storage groove 31 is parallel to the outer contour line at the rounded corners.

[0107] The shape of the air storage groove matches the shape of the cover plate body, which is convenient for the gas that cannot be released during the lamination process to enter the air storage groove.

[0108] The embodiment of the present disclosure also provides a display device, which includes the aforementioned display screen and a power supply, and the power supply is electrically connected to the display screen.

[0109] Optionally, the display device can be any product or component with a display function such as a notebook computer, a mobile phone, a tablet computer, a television, a monitor, a wearable device, a navigator, etc.

[0110] An embodiment of the present disclosure also provides a method for manufacturing a display screen cover plate. Figure 13 It is a flowchart of a method for manufacturing a display screen cover plate provided by an embodiment of the present disclosure. As Figure 13 shown, the method may include:

[0111] In S1, a cover plate body is provided.

[0112] The cover plate body has a display area and a shielding area, and the shielding area surrounds the display area.

[0113] In S2, a shielding layer is formed on the bonding surface of the cover plate body.

[0114] Wherein, the shielding layer is located in the shielding area, and the shielding layer includes a first sub-shielding layer and a second sub-shielding layer that are sequentially stacked on the bonding surface in a direction away from the bonding surface. The inner edge of the second sub-shielding layer is indented in a direction away from the display area relative to the inner edge of the first sub-shielding layer, forming a stepped structure. The inner edge of the second sub-shielding layer has a plurality of notches, and the plurality of notches are arranged along the extending direction of the inner edge of the second sub-shielding layer.

[0115] Optionally, S2 includes the following three steps:

[0116] The first step is to form a first sub-shielding layer on the bonding surface located in the shielding area;

[0117] The second step is to form a second sub-shielding layer on the surface of the first sub-shielding layer away from the bonding surface;

[0118] The third step is to form a plurality of notches on the inner edge of the second sub-shielding layer.

[0119] In this first step, the first sub-shielding layer can be formed by printing or other means.

[0120] In this second step, the second sub-shielding layer can be formed by printing or other means.

[0121] In this third step, a plurality of notches can be formed on the inner edge of the second sub-shielding layer by letterpress printing.

[0122] An embodiment of the present disclosure also provides a method for manufacturing a display screen. The method may include: providing an adhesive layer between the bonding surface of the display screen panel and the display panel; then, applying pressure to the display screen panel and the display panel to bond the display screen panel and the display panel through the adhesive layer.

[0123] In implementation, the display panel and the adhesive layer can be sequentially placed on a bonding tool, and the bonding tool with the display panel and the adhesive layer placed thereon can be placed on one side of the display screen cover plate; the display panel and the adhesive layer are pressed into the bonding surface of the display screen cover plate through the bonding tool.

[0124] Figure 14 It is a top view structural schematic diagram of a fitting tool. Figure 15 is Figure 14 a side view structural schematic diagram of the fitting tool in Figure 14 and Figure 15 As shown, the shape of the edge of the fitting tool matches the shape of the fitting surface. Exemplarily, the edge of the fitting tool includes a plurality of first regions 41 and a plurality of second regions 42. The plurality of second regions 42 correspond to the aforementioned double-fold region, and the plurality of first regions 41 correspond to the aforementioned single-fold region.

[0125] The closer the surface topography of the fitting tool is to the topography of the fitting surface, the higher the degree of fitting between the display panel and the adhesive layer on the fitting tool and the fitting surface. The more complex the topography of the fitting surface and the greater the curvature, the higher the requirements for the surface topography of the fitting tool. In practical applications, it is difficult to make the surface topography of the fitting tool (especially the topography at the position corresponding to the double-fold region) exactly the same as the topography of the fitting surface. When the arc of the fitting surface of the cover plate body is relatively deep, if the surface topography of the fitting tool changes correspondingly, it may increase the stress of the fitting tool on the adhesive layer during fitting, resulting in rebound bubbles. If the surface topography of the fitting tool does not change correspondingly, the adhesive layer may not be firmly attached during fitting, resulting in bubble residues. Bubbles are particularly likely to occur at the double-fold region. Therefore, by providing the aforementioned notch at the double-fold region in the embodiments of the present disclosure, the fitting bubbles in the double-fold region can be effectively improved, and the product yield can be increased.

[0126] It should be noted that for the sake of illustration, the aforementioned Figure 3 , Figure 5 , Figure 7 and Figure 9 are all illustrated in the unfolded state of the cover plate body 10. In fact, the cover plate body 10 is curved.

[0127] As mentioned above, it is not any form of limitation to the present disclosure. Although the present disclosure has been disclosed as above through embodiments, it is not intended to limit the present disclosure. Any person skilled in the art, without departing from the scope of the technical solution of the present disclosure, can make some changes or modifications to the above-disclosed technical content to form equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present disclosure, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present disclosure still fall within the scope of the technical solution of the present disclosure.

Claims

1. A display screen cover, characterized in that: include: Cover plate body and shielding layer; The cover body has a display area and a shielding area, and the shielding area surrounds the display area; The blocking layer is located in the shielding area and on the fitting surface of the cover plate body, and the blocking layer includes a first sub-shielding layer and a second sub-shielding layer sequentially stacked on the fitting surface in a direction away from the fitting surface, an inner edge of the second sub-shielding layer is indented relative to an inner edge of the first sub-shielding layer in a direction away from the display area to form a step structure, and the inner edge of the second sub-shielding layer has a plurality of notches, and the plurality of notches are arranged along an extension direction of the inner edge of the second sub-shielding layer.

2. The display screen cover according to claim 1, characterized in that: Every two adjacent notches define a protrusion on the inner edge of the second sub-shielding layer, and the projection of the protrusion on the surface of the first sub-shielding layer away from the laminating surface is in the shape of a triangle, a trapezoid, an arc or a rectangle.

3. The display screen cover according to claim 2, characterized in that: At least two adjacent protrusions are connected.

4. The display screen cover according to claim 3, characterized in that: The projection of the protrusion on the surface of the first sub-shielding layer away from the bonding surface is a trapezoid, the length of the upper base of the trapezoid is 0.2±0.1 mm, the length of the lower base of the trapezoid is 0.5±0.1 mm, and the height of the trapezoid is 0.18±0.1 mm.

5. The display screen cover according to claim 2, characterized in that: The top surface of the protrusion is an inclined surface, which is the surface of the protrusion away from the bonding surface, and the thickness of the side of the top surface of the protrusion close to the inner edge of the first sub-shielding layer is smaller than the thickness of the side away from the inner edge of the first sub-shielding layer.

6. The display screen cover according to any one of claims 1 to 5, characterized in that: The cover plate body includes a plane portion and a bending portion, the bending portion surrounds the plane portion and is connected to an edge of the plane portion, the shielding area is located at the bending portion, and the plurality of notches are located at the bending portion.

7. The display screen cover according to claim 6, characterized in that: The bending portion includes a plurality of single folding areas and a plurality of double folding areas, each of the double folding areas is located between two adjacent single folding areas and is connected to the two adjacent single folding areas, and the plurality of notches are located in at least one of the double folding areas.

8. The display screen cover according to claim 7, characterized in that: The second sub-shielding layer has an exhaust hole, which is located in at least one of the single folding areas. The exhaust hole extends from the inner edge of the second sub-shielding layer in a direction away from the display area, and the distance between one end of the exhaust hole close to the outer edge of the second sub-shielding layer and the outer edge of the second sub-shielding layer is greater than 0.

9. The display screen cover according to claim 8, characterized in that: Two exhaust holes are provided on one side of each double folding area, the width of the exhaust holes is 0.1mm-0.2mm, and the distance between the two exhaust holes is 10mm-20mm.

10. The display screen cover according to any one of claims 1 to 5 and claims 7 to 9, characterized in that: The second sub-shielding layer has a groove therein, and an opening of the groove is located on a surface of the second sub-shielding layer away from the first sub-shielding layer.

11. The display screen cover according to claim 10, characterized in that: The second sub-shielding layer has a plurality of grooves therein, so that the second sub-shielding layer has a grid structure.

12. The display screen cover according to claim 10, characterized in that: The width of the groove is 0.2±0.1 mm, and the spacing between adjacent grooves is 0.4±0.1 mm.

13. A display screen, characterized in that: It comprises a display panel, a display cover plate and an adhesive layer, wherein the adhesive layer is located between the bonding surface of the display cover plate and the display panel, and the display cover plate is the display cover plate according to any one of claims 1 to 12.

14. The display screen according to claim 13, characterized in that: The adhesive layer is an optically transparent adhesive (OCA) layer, and a surface of the adhesive layer opposite to the display screen cover plate has an air storage groove, and the air storage groove is located between the arc starting area of ​​the cover plate body and the inner edge of the first sub-shielding layer.

15. The display screen according to claim 14, characterized in that: The width of the air storage groove is 0.2±0.1 mm, and the depth of the air storage groove is 0.05±0.05 mm.

16. The display screen according to claim 14 or 15, characterized in that: The air storage groove is arranged along a portion of the edge of the cover plate body, and an extension direction of the air storage groove matches an extension direction of an edge of the cover plate body where the air storage groove is located.

17. A display device, characterized in that: The invention comprises a power supply and a display screen as claimed in any one of claims 13 to 16, wherein the power supply is electrically connected to the display screen.

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