Display device

Abstract

The present invention discloses a display device. The display device includes a main area, a side area, and a corner area. The side area is located on the periphery of the main area. The corner area connects the side areas on adjacent sides and includes a groove area and at least two adhesive layers. The adhesive layers have grooves in the groove area. The at least two adhesive layers include a first adhesive layer and a second adhesive layer. The grooves in the first adhesive layer are denoted as first grooves, and first protrusions are formed between adjacent first grooves. The grooves in the second adhesive layer are denoted as second grooves, and second protrusions are formed between adjacent second grooves. In a direction perpendicular to the plane of the first adhesive layer, the first grooves overlap with the second protrusions, and / or the second grooves overlap with the first protrusions. By providing grooves on the adhesive layer in the groove area, with the first grooves overlapping with the second protrusions, and / or the second grooves overlapping with the first protrusions, the colloid of the adhesive layer can be filled into the grooves after fitting and extrusion, which can reduce the overall thickness of the groove area and lower the risk of wrinkle occurrence.

Description

Technical Field

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

[0002] In order to facilitate users to hold or increase the screen-to-body ratio, consumer electronic products (such as smart phones and tablet computers, etc.) will design the display screen (such as an OLED display screen) into a shape with a certain curvature (such as a two-curved screen or a four-curved screen), so that the user's palm can hold the consumer electronic product more comfortably or increase the proportion of the display screen.

[0003] However, in the process of bonding and squeezing flexible module materials (such as optical glue, polarizer, flexible panel, and backplane, etc.) in the corner area of the current display device, the flexible module materials change from the original flattened state to a bent state with a certain curvature, which may cause the compression amount of the flexible module materials in the corner area to exceed a certain limit, that is, the perimeter difference in the corner area is too large, resulting in wrinkling in the corner area. Summary of the Invention

[0004] Embodiments of the present invention provide a display device to reduce the overall thickness of the groove area in the corner area, reduce the compression amount of the groove area, thereby reducing the risk of wrinkling in the groove area and reducing the risk of wrinkling in the corner area.

[0005] Embodiments of the present invention provide a display device, which includes a main area, a side area, and a corner area; the side area is located on the periphery of the main area, and the corner area connects the adjacent two side areas and includes a groove area;

[0006] At least two bonding layers, the bonding layer has grooves in the groove area, including a first bonding layer and a second bonding layer;

[0007] The groove in the first bonding layer is denoted as the first groove, and a first protrusion is formed between adjacent first grooves;

[0008] The groove in the second bonding layer is denoted as the second groove, and a second protrusion is formed between adjacent second grooves;

[0009] In the direction perpendicular to the plane where the first bonding layer is located, the first groove overlaps with the second protrusion, and / or the second groove overlaps with the first protrusion.

[0010] The corner region of the embodiment of the present invention includes a groove region. By providing grooves in the adhesive layer of the groove region, the grooves at least include a first groove located in the first adhesive layer and a second groove located in the second adhesive layer. In the direction perpendicular to the plane where the first adhesive layer is located, the first groove overlaps with the second protrusion, and / or the second groove overlaps with the first protrusion. During the process of fitting and squeezing in the corner region, the adhesive layer deforms, and then part of the colloid in the adhesive layer fills into the grooves. Compared with the prior art solution without grooves provided in the corner region, the first groove and the second groove of the present invention can accommodate part of the colloid. After fitting and squeezing, through the first groove and the second groove, the overall thickness of the groove region is reduced, the compression amount of the groove region is reduced, and then the perimeter difference of the groove region before and after fitting and squeezing is reduced, thereby reducing the risk of wrinkles occurring in the corner region. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of a display device provided by an embodiment of the present invention;

[0012] Figure 2 is Figure 1 a cross-sectional schematic diagram along the AA' direction in

[0013] Figure 3 is Figure 1 another cross-sectional schematic diagram along the AA' direction in

[0014] Figure 4 is Figure 1 another cross-sectional schematic diagram along the AA' direction in

[0015] Figure 5 is Figure 1 another cross-sectional schematic diagram along the AA' direction in

[0016] Figure 6 is Figure 1 another cross-sectional schematic diagram along the AA' direction in

[0017] Figure 7 is Figure 1 another cross-sectional schematic diagram along the AA' direction in

[0018] Figure 8 is Figure 1 another cross-sectional schematic diagram along the AA' direction in

[0019] Figure 9 is Figure 1 another cross-sectional schematic diagram along the AA' direction in

[0020] Figure 10 is Figure 1 another cross-sectional schematic diagram along the AA' direction in

[0021] Figure 11 is Figure 1 An enlarged structural diagram of area B in

[0022] Figure 12 is Figure 1 Another enlarged structural diagram of area B in Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present invention clearer, the following will, in conjunction with the accompanying drawings in the embodiments of the present invention, completely describe the technical solutions of the present invention through specific implementation manners. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Figure 1 is a schematic structural diagram of a display device provided by an embodiment of the present invention. Figure 2 is Figure 1 A cross-sectional schematic diagram along the AA' direction in Figure 1 and Figure 2 The display device 01 provided by the embodiment of the present invention includes a main area AA, a side area BB and a corner area CC. Among them, the side area BB is located on the periphery of the main area AA, the corner area CC connects the side areas BB on adjacent sides, and the corner area CC includes a groove area DD. The display device 01 includes at least two bonding layers 10, and the bonding layer 10 has a groove 20 in the groove area DD. The bonding layer 10 includes a first bonding layer 110 and a second bonding layer 120. The groove 20 in the first bonding layer 110 is denoted as the first groove 210, and a first protrusion 310 is formed between adjacent first grooves 210. The groove 20 in the second bonding layer 120 is denoted as the second groove 220, and a second protrusion 320 is formed between adjacent second grooves 220. In the direction X perpendicular to the plane where the first bonding layer 110 is located, the first groove 210 overlaps with the second protrusion 320, and / or the second groove 220 overlaps with the first protrusion 310.

[0025] The corner area CC of the embodiment of the present invention includes a groove area DD. By providing grooves 20 in the bonding layer 10 of the groove area DD, that is, providing a first groove 210 in the first bonding layer 110 and a second groove 220 in the second bonding layer 120. During the process of fitting and squeezing in the corner area, the colloid in the first protrusion 310 between adjacent first grooves 210 will fill into the first groove 210, but does not completely fill the first groove 210. That is to say, the height of the first protrusion 310 will decrease, and the depth of the first groove 210 will become smaller. Similarly, the height of the second protrusion 320 will decrease, and the depth of the second groove 220 will become smaller. Further, in the direction perpendicular to the plane where the first bonding layer 110 is located, the first groove 210 and the second protrusion 320 are arranged to overlap, and / or the second groove 220 and the first protrusion 310 are arranged to overlap, so that the first groove 210 and the second groove 220 partially overlap, or the first groove 210 and the second groove 220 do not overlap. In other words, the first protrusion 310 and the second protrusion 320 do not overlap, or the first protrusion 310 and the second protrusion 320 partially overlap. Further, in the direction Y of the plane where the first bonding layer 110 is located, the first protrusion 310 and the second protrusion 320 are located at different positions, so that the positions where the height decreases are different, so as to reduce the overall thickness of the groove area DD. Compared with the prior art in which no grooves are provided in the corner area, and the thickness is larger and the compression amount is larger after fitting and squeezing, the first groove 210 and the second groove 220 of the present invention can accommodate part of the colloid. After fitting and squeezing, through the first groove 210 and the second groove 220, the overall thickness of the groove area DD is reduced, so that the compression amount of the groove area DD is reduced, and further the perimeter difference of the groove area DD before and after fitting and squeezing is reduced, thereby reducing the risk of wrinkles occurring in the corner area CC.

[0026] Exemplarily, referring to Figure 1, The display device includes a main area AA, a side area BB, and a corner area CC. The main area AA can be a display area. The main area AA can include a plurality of pixel circuits, a plurality of gate lines, and a plurality of data lines (not shown in the above figures) located on the substrate, and sub-pixels located on one side of the substrate. The sub-pixels can be arranged in an array. The orthographic projections of the plurality of gate lines and the plurality of data lines on the substrate can intersect to form a plurality of circuit areas, and one pixel circuit can be arranged in each circuit area. The plurality of data lines are electrically connected to the plurality of pixel circuits, and the plurality of data lines can be configured to provide data signals to the plurality of pixel circuits. The plurality of gate lines are electrically connected to the plurality of pixel circuits, and the plurality of gate lines can be configured to provide gate control signals to the plurality of pixel circuits, and then drive the sub-pixels to emit light through the pixel circuits to achieve normal display of the main area AA. Among them, the gate control signal can include a scanning signal, or can include a scanning signal and a light emission control signal. The side area BB is located on the periphery of the main area AA and surrounds the main area AA. The corner area CC is located at the four top corners of the display device 01 and is respectively connected to the side area BB on adjacent sides. The side area BB and the corner area CC can also be used for display, and the embodiments of the present invention do not limit this.

[0027] It should be noted that when the side area BB and the corner area CC are also used for display, the main area AA and the side area BB are an integrated structure, and there is no connection trace or gap between them. When displaying a picture, they jointly present a complete pattern. The side area BB and the corner area CC are also an integrated structure, and there is no connection trace or gap between them. When displaying a picture, they jointly present an integrated pattern.

[0028] Exemplarily, the corner area CC includes a groove area DD, and a groove 20 is provided in the adhesive layer 10 of the groove area DD. Among them, the adhesive layer 10 at least includes a first adhesive layer 110 and a second adhesive layer 120. Specifically, the first adhesive layer 10 can be an optical adhesive film layer. The optically clear adhesive (OCA) film layer has characteristics such as high light transmittance and good bonding strength, and is widely used in the manufacturing process of display screens to bond different film layers of the display screen. For example, the optical adhesive film layer can be provided between the display panel and the cover plate to bond the display panel and the cover plate. That is, the first adhesive layer 110 can be located between the cover plate and the polarizer to bond the polarizer and the cover plate. The second adhesive layer 120 can be a polarizer adhesive layer, and then the display panel and the polarizer are bonded through the second adhesive layer 120.

[0029] It should be noted that the above embodiments only schematically illustrate that the first adhesive layer 110 is an optical adhesive film layer and the second adhesive layer 120 is a polarizer adhesive layer. However, the embodiments of the present invention are not limited thereto. In other embodiments, the adhesive layer 10 may further include a backplane adhesive layer for bonding the backplane and the display panel. The first adhesive layer 110 and the second adhesive layer 120 may be any two of the optical adhesive film layer, the polarizer adhesive layer, and the backplane adhesive layer. That is, the first adhesive layer 110 may also be a polarizer adhesive layer, and the second adhesive layer 120 may also be a backplane adhesive layer. Then, the polarizer and the display panel are bonded through the first adhesive layer 110, and the display panel and the backplane are bonded through the second adhesive layer 120, etc. Those skilled in the art can set according to needs.

[0030] The first adhesive layer 110 includes first grooves 210 and first protrusions 310 between adjacent first grooves 210. The second adhesive layer 120 includes second grooves 220 and second protrusions 320 between adjacent second grooves 220. Wherein, in a direction perpendicular to the plane of the first adhesive layer 110, the first grooves 210 overlap with the second protrusions 320, and / or the second grooves 220 overlap with the first protrusions 310, that is, the first grooves 210 and the second grooves 220 partially overlap, or the first grooves 210 and the second grooves 220 do not overlap. During the fitting and extrusion process in the corner area, through the first grooves 210 and the second grooves 220, part of the colloid located at the first protrusions 310 and part of the colloid located at the second protrusions 320 in the adhesive layer 10 are respectively filled into the first grooves 210 and the second grooves 220, thereby reducing the depths of the first grooves 210 and the second grooves 220, and reducing the heights of the first protrusions 310 and the second protrusions 320. Since the first grooves 210 and the second grooves 220 partially overlap, or the first grooves 210 and the second grooves 220 do not overlap, that is, in the direction of the plane of the first adhesive layer 110, the first grooves 210 and the second grooves 220 are at different positions, that is, the positions where the heights of the first protrusions 310 and the second protrusions 320 are reduced are different, so as to reduce the overall thickness of the groove area DD. Compared with the prior art where no grooves are provided in the corner area, and the thickness is larger and the compression amount is larger after fitting and extrusion, the present invention can reduce the overall thickness of the groove area DD, reduce the compression amount of the groove area DD, and further reduce the perimeter difference of the groove area DD before and after fitting and extrusion, thereby reducing the risk of wrinkles occurring in the corner area CC.

[0031] It should be noted that, for better illustrating the thickness change amount of the corner area before and after the fitting and extrusion process, Figure 2 and the subsequent drawings are all described in the flattened state of the corner area before fitting and extrusion.

[0032] It should also be noted that after the fitting and extrusion in the corner area, the first bonding layer 110 in the corner area still has the first groove 210 and the first protrusion 310, and the second bonding layer 120 still has the second groove 220 and the second protrusion 320. Only the depth of the groove 20 becomes smaller and the height of the protrusion decreases compared with that before the fitting and extrusion. In addition, after the fitting and extrusion in the corner area, the original flattened state changes to a curved surface state with a certain curvature. Therefore, the direction X perpendicular to the plane where the first bonding layer 110 is located and the direction Y parallel to the plane where the first bonding layer 110 is located mentioned above include both the directions in the flattened state and the directions in the curved surface state.

[0033] Continue to refer to Figure 2 , within the groove area DD, the total thickness of the bonding layer 10 at any two positions is equal. Among them, the total thickness of the bonding layer 10 is the sum of the thicknesses of each bonding layer 10 in the direction X perpendicular to the plane where the first bonding layer 110 is located.

[0034] Specifically, as Figure 2 shown, multiple first grooves 210 can be evenly spaced, multiple second grooves 220 can be evenly spaced, and there is a one-to-one correspondence between multiple first grooves 210 and multiple second grooves 220 in the direction X perpendicular to the plane where the first bonding layer 110 is located. Then, the first groove 210 and the second groove 220 with a corresponding relationship are denoted as the groove group S, and the bonding layer 10 is composed of multiple groove groups S. During the fitting and extrusion process, the colloid of the bonding layer 10 fills into the first groove 210 and the second groove 220 in the groove group S. Before the fitting and extrusion, the total thickness of the bonding layer 10 at any two positions of the first groove 210, at any two positions of the second groove 220, and at any one position in the first groove 210 and any one position in the second groove 220 is equal. Or it can be understood that before the fitting and extrusion, the second groove 220 in the same groove group S is translated upward in the direction X perpendicular to the plane where the first bonding layer 110 is located, so that the second groove 220 in the same groove group S and the first groove 210 are in the same plane, and the combined depth of the position where the second groove 220 is located and the position where the first groove 210 is located is the same. Then, within the groove area DD, the total thickness of the bonding layer 10 at any two positions is equal, so that the overall thickness of the groove area DD after the fitting and extrusion remains consistent, which is beneficial to reducing the perimeter difference of the groove area DD before and after the fitting and extrusion, thereby reducing the risk of wrinkles occurring in the corner area CC.

[0035] It should be noted that the explanation of translating the groove 20 upward in the direction X perpendicular to the plane where the first adhesive layer 110 is located in the present invention is only for more convenient understanding of the solution. During the actual lamination and extrusion process, the position of the groove 20 remains unchanged, and the colloid of each adhesive layer 10 will only fill into the groove 20 of the corresponding adhesive layer 10. Moreover, the deformation degree of the adhesive layer 10 is greater than that of the film layer (display panel, polarizer, or backplane, etc.) bonded to the adhesive layer 10. Therefore, the change in thickness is approximately the same as the deformation degree of the adhesive layer 10.

[0036] It should also be noted that since it is the overall thickness reduction of the groove area DD, after lamination and extrusion, the total thickness of the adhesive layer 10 at any two positions within the groove area DD is still equal.

[0037] Optionally, continue to refer to Figure 2 , the groove area DD and the corner area CC have the same area range. Specifically, as Figure 2 shown, within the same groove group S, the projections of the first groove 210 and the second groove 220 in the direction X perpendicular to the plane where the first adhesive layer 110 is located do not overlap, and their projections traverse the area where the same groove group S is located. Or it can be understood that the second groove 220 in the same groove group S is translated upward in the direction X perpendicular to the plane where the first adhesive layer 110 is located, so that the second groove 220 in the same groove group S is in the same plane as the first groove 210, and the first groove 210 and the second groove 220 are arranged closely. In this way, the entire corner area CC is traversed by the first groove 210 and the second groove 220, so that the groove area DD and the corner area CC have the same area range. Furthermore, the overall thickness of the corner area CC can be reduced, the compression amount of the corner area CC can be decreased, and then the perimeter difference of the corner area CC before and after lamination and extrusion can be reduced, thereby further reducing the risk of wrinkles occurring in the corner area CC.

[0038] Exemplarily, Figure 3 is Figure 1 another cross-sectional schematic diagram along the AA' direction in Figure 3 . At least two adhesive layers 10 further include a third adhesive layer 130. The groove 20 in the third adhesive layer 130 is denoted as the third groove 230, and a third protrusion 330 is formed between adjacent third grooves 230. In the direction X perpendicular to the plane where the first adhesive layer 110 is located, the third groove 230 overlaps with the first protrusion 310 and / or the second protrusion 320, and the third protrusion 330 overlaps with the first groove 210 and / or the second groove 220.

[0039] Exemplarily, at least two bonding layers 10 further include a third bonding layer 130. The third bonding layer 130 can be a backplane adhesive layer. Through the third bonding layer 130, a polarizer and a backplane can be bonded. The third bonding layer 130 includes third grooves 230 and third protrusions 330 located between adjacent third grooves 230. At this time, the groove group S includes the first groove 210, the second groove 220, and the third groove 230 with corresponding relationships. Further, during the fitting and extrusion process in the corner area, through the first groove 210, the second groove 220, and the third groove 230, part of the colloid of the bonding layer 10 located at the first protrusion 310, part of the colloid located at the second protrusion 320, and part of the colloid located at the third protrusion 330 are respectively filled into the first groove 210, the second groove 220, and the third groove 230. As a result, the depths of the first groove 210, the second groove 220, and the third groove become smaller, and the heights of the first protrusion 310, the second protrusion 320, and the third protrusion 330 decrease. Due to the direction X perpendicular to the plane where the first bonding layer 110 is located, the third groove 230 overlaps with the first protrusion 310 and / or the second protrusion 320, and the third protrusion 330 overlaps with the first groove 210 and / or the second groove 220. That is to say, in the direction of the plane where the first bonding layer 110 is located, the positions where the first groove 210, the second groove 220, and the third groove are located are different, that is, the positions where the heights of the first protrusion 310, the second protrusion 320, and the third protrusion 330 decrease are different, so as to reduce the overall thickness of the groove area DD. Compared with the prior art solution where no grooves are provided in the corner area and the thickness is larger and the compression amount is larger after fitting and extrusion, the present invention can reduce the overall thickness of the groove area DD, reduce the compression amount of the groove area DD, and further reduce the perimeter difference of the groove area DD before and after fitting and extrusion, and further reduce the risk of wrinkles occurring in the corner area CC.

[0040] Continue to refer to Figure 3 , the first groove 210, the second groove 220, and the third groove 230 each include a single groove depth. Specifically, as Figure 3 shown, the depth distributions of the first groove 210, the second groove 220, and the third groove 230 are uniform, that is, within the same groove, the depths at various positions of the groove 20 are the same, so that the setting method of the groove 20 is simple.

[0041] Exemplarily, Figure 4 is Figure 1 another cross-sectional schematic diagram along the AA' direction in Figure 5 is Figure 1 another cross-sectional schematic diagram along the AA' direction in Figure 3 , Figure 4 and Figure 5, in the direction X perpendicular to the plane where the first adhesive layer 110 is located, any two of the first groove 210, the second groove 220, and the third groove 230 are staggered. Any two of the first groove 210, the second groove 220, and the third groove 230 have the same groove depth.

[0042] Exemplarily, the groove depth of the first groove 210 can be denoted as H1, the groove depth of the second groove 220 can be denoted as H2, and the groove depth of the third groove 230 can be denoted as H3. Any two of the first groove 210, the second groove 220, and the third groove 230 are staggered in the direction Y of the plane where the first adhesive layer 110 is located. In other words, along the direction X perpendicular to the plane where the first adhesive layer 110 is located, the projections of the first groove 210, the second groove 220, and the third groove 230 do not overlap, including that the first groove 210, the second groove 220, and the third groove 230 do not completely traverse the corner region CC. Specifically, see Figure 4 , it can be understood that the second groove 220 and the third groove 230 in the same groove group S are respectively translated upward along the direction X perpendicular to the plane where the first adhesive layer 110 is located, so that the second groove 220 and the third groove 230 in the same groove group S are in the same plane as the first groove 210. There are intervals between the first groove 210, the second groove 220, and the third groove 230, and the corner region CC is not completely traversed; or see Figure 5 , it can be understood that the second groove 220 and the third groove 230 in the same groove group S are respectively translated upward along the direction X perpendicular to the plane where the first adhesive layer 110 is located, so that the second groove 220 and the third groove 230 in the same groove group S are in the same plane as the first groove 210. There is an interval between the first groove 210 and the second groove 220, and the second groove 220 and the third groove 230 are closely arranged. In this way, the corner region CC is not completely traversed, etc. Furthermore, through the scheme of not completely traversing the corner region CC, the overall thickness of the groove region DD can be reduced, the compression amount of the groove region DD can be reduced, and then the perimeter difference of the groove region DD before and after fitting and extrusion can be reduced, thereby reducing the risk of wrinkling in the corner region CC.

[0043] In addition, it also includes completely traversing the corner region CC through the first groove 210, the second groove 220, and the third groove 230, such as Figure 3As shown, it can be understood that the second groove 220 and the third groove 230 in the same groove group S are respectively translated upward along the direction X perpendicular to the plane where the first adhesive layer 110 is located, so that the second groove 220 and the third groove 230 in the same groove group S are in the same plane as the first groove 210. The first groove 210, the second groove 220, and the third groove 230 are arranged closely, completely traversing the corner area CC. Furthermore, the overall thickness of the corner area CC can be reduced. And because the first groove 210, the second groove 220, and the third groove 23 have the same groove depth, that is, H1 = H2 = H3. Therefore, compared with the prior art solution without grooves in the corner area, the overall thickness of the corner area CC can be reduced by H1, the compression amount of the corner area CC is reduced, and then the perimeter difference of the corner area CC before and after fitting and extrusion is reduced, thereby further reducing the risk of wrinkles occurring in the corner area CC.

[0044] Figure 6 is Figure 1 Another cross-sectional schematic diagram along the AA' direction in, see Figure 6 , in the direction X perpendicular to the plane where the first adhesive layer 110 is located, the first groove 210 is offset from both the second groove 220 and the third groove 230, the second groove 220 and the third groove 230 overlap, and the groove depth H1 of the first groove 210 is equal to the sum of the groove depths of the second groove 220, H2, and the third groove H3.

[0045] Exemplarily, as Figure 6 shown, along the direction Y parallel to the plane where the first adhesive layer 110 is located, the first groove 210 is offset from both the second groove 220 and the third groove 230, and along the direction X perpendicular to the plane where the first adhesive layer 110 is located, the second groove 220 and the third groove 230 overlap. It can be understood that the second groove 220 and the third groove 230 in the same groove group S are respectively translated upward along the direction X perpendicular to the plane where the first adhesive layer 110 is located. Since the second groove 220 and the third groove 230 overlap, therefore, the overlapping structure formed by the second groove 220 and the third groove 230 after upward translation is in the same plane as the first groove 210. And because the groove depth H1 of the first groove 210 is equal to the sum of the groove depths of the second groove 220, H2, and the third groove H3, that is, H1 = H2 + H3. Therefore, compared with the prior art solution without grooves in the corner area, the overall thickness of the groove area DD can be reduced by H1, the compression amount of the groove area DD is reduced, and then the perimeter difference of the groove area DD before and after fitting and extrusion is reduced, thereby further reducing the risk of wrinkles occurring in the corner area CC.

[0046] It should be noted that the above-mentioned first groove 210, second groove 220, and third groove 230 may completely traverse the corner region CC or may not completely traverse the corner region CC. The present invention does not limit this.

[0047] Figure 7 is Figure 1 Another cross-sectional schematic diagram along the AA' direction in [figure reference], see Figure 7 , the first groove 210 includes a first sub-part 2101 and a second sub-part 2102 of the first groove. The first sub-part 2101 and the second sub-part 2102 of the first groove have different groove depths, and both the second groove 220 and the third groove 230 include a single groove depth.

[0048] Specifically, as Figure 7 shown, the first groove 210 includes a first sub-part 2101 and a second sub-part 2102 of the first groove with different groove depths. The groove depth distributions of the second groove 220 and the third groove 230 are uniform. That is, within the same groove, the depths at various positions of the groove 20 are the same. Furthermore, by setting the first groove 210 with different depths, and the second groove 220 and the third groove 230 with uniform groove depth distributions, the overall thickness of the groove region DD can be reduced while diversifying the setting method of the groove 20.

[0049] Based on the above embodiments, continue to refer to Figure 7 , in the direction X perpendicular to the plane of the first adhesive layer 110, the first sub-part 2101 of the first groove is offset from both the second groove 220 and the third groove 230, the second sub-part 2102 of the first groove is offset from the second groove 220 and overlaps with the third groove 230, and the second groove 220 overlaps with the third groove 230. The groove depth H1-1 of the first sub-part 2101 of the first groove is equal to the sum of the groove depth H1-2 of the second sub-part 2102 of the first groove and the groove depth H3 of the third groove, and is equal to the sum of the groove depth H2 of the second groove 220 and the groove depth H3 of the third groove 230.

[0050] Specifically, as Figure 7As shown, along the direction Y parallel to the plane where the first adhesive layer 110 is located, the first groove 210 and the second groove 220 are staggeredly arranged. Specifically, the first sub - part 2101 of the first groove is staggered from both the second groove 220 and the third groove 230, and the second sub - part 2102 of the first groove is staggered from the second groove 220. Along the direction X perpendicular to the plane where the first adhesive layer 110 is located, the second sub - part 2102 of the first groove overlaps with the third groove 230, and the second groove 220 overlaps with the third groove 230. Thus, the corner area CC can be traversed by the first sub - part 2101 of the first groove, the second sub - part 2102 of the first groove, the second groove 220, and the third groove 230. It can be understood that the second groove 220 and the third groove 230 are respectively translated upward along the direction X perpendicular to the plane where the first adhesive layer 110 is located. Since the second groove 220 overlaps with the third groove 230, the overlapping structure formed by the second groove 220 and the third groove 230 after upward translation is in the same plane as the first groove 210. Also, because the groove depth H1 - 1 of the first sub - part 2101 of the first groove is equal to the sum of the groove depth H1 - 2 of the second sub - part 2102 of the first groove and the groove depth H3 of the third groove, and is also equal to the sum of the groove depth H2 of the second groove 220 and the groove depth H3 of the third groove 230, that is, (H1 - 1)=(H1 - 2)+H3 = H2 + H3. Therefore, the combined grooves form a large groove that traverses the corner area CC with a groove depth of H1 - 1. Compared with the prior - art solution without grooves in the corner area, the overall thickness of the corner area CC can be reduced by H1 - 1, the compression amount of the corner area CC is reduced, and then the perimeter difference before and after the corner area CC is fitted and extruded is reduced, thereby further reducing the risk of wrinkles occurring in the corner area CC.

[0051] Figure 8 is Figure 1 Another cross - sectional schematic diagram along the AA' direction in Figure 8 , along the direction X perpendicular to the plane where the first adhesive layer 110 is located, the first sub - part 2101 of the first groove is staggered from both the second groove 220 and the third groove 230, the second sub - part 2102 of the first groove overlaps with the second groove 220 and is staggered from the third groove 230, and the second groove 220 is staggered from the third groove 230. The groove depth H1 - 1 of the first sub - part 2101 of the first groove is equal to the sum of the groove depth H1 - 2 of the second sub - part 2102 of the first groove and the groove depth H2 of the second groove 220, and is equal to the groove depth H3 of the third groove 230.

[0052] Exemplarily, see Figure 8, along the direction Y parallel to the plane where the first adhesive layer 110 is located, the first groove 210 and the third groove 230 are staggeredly arranged, and the second groove 220 and the third groove 230 are staggeredly arranged. Specifically, the first sub-part 2101 of the first groove is staggered from both the second groove 220 and the third groove 230, and the second sub-part 2102 of the first groove is staggered from the third groove 230. Along the direction X perpendicular to the plane where the first adhesive layer 110 is located, the second sub-part 2102 of the first groove overlaps with the second groove 220. Thus, the corner area CC can be traversed by the first sub-part 2101 of the first groove, the second sub-part 2102 of the first groove, the second groove 220, and the third groove 230. It can be understood that the second groove 220 and the third groove 230 are respectively translated upward along the direction X perpendicular to the plane where the first adhesive layer 110 is located. Since the second groove 220 and the third groove 230 overlap, the overlapping structure formed by the second groove 220 and the third groove 230 after upward translation is in the same plane as the first groove 210. Also, because the groove depth H1-1 of the first sub-part 2101 of the first groove is equal to the sum of the groove depth H1-2 of the second sub-part 2102 of the first groove and the groove depth H2 of the second groove 220, and is also equal to the groove depth H3 of the third groove 230, that is, (H1-1)=(H1-2)+H2=H3. Therefore, the combined grooves form a large groove that traverses the corner area CC and has a groove depth of H1-1. Compared with the prior art solution without grooves in the corner area, the overall thickness of the corner area CC can be reduced by H1-1, the compression amount of the corner area CC can be reduced, and further, the perimeter difference before and after the corner area CC is fitted and extruded can be reduced, thereby further reducing the risk of wrinkles occurring in the corner area CC.

[0053] Figure 9 Yes Figure 1 Another cross-sectional schematic diagram along the AA' direction in, see Figure 9 , the first groove 210 includes a first sub-part 2101 and a second sub-part 2102 of the first groove. The first sub-part 2101 and the second sub-part 2102 of the first groove have different groove depths. The third groove 230 includes a first sub-part 2301 and a second sub-part 2302 of the third groove. The first sub-part 2301 and the second sub-part 2302 of the third groove have different groove depths. The second groove 220 includes a single groove depth.

[0054] Specifically, as Figure 9As shown, the first groove 210 includes a first sub - part 2101 and a second sub - part 2102 of the first groove with different groove depths. The third groove 230 includes a first sub - part 2301 and a second sub - part 2302 of the third groove with different groove depths. The groove depth distribution of the second groove 220 is uniform, that is, the depth at each position of the second groove 220 is the same. Furthermore, by setting the first groove 210 and the third groove 230 with different depths, and the second groove 220 with a uniform groove depth distribution, the setting method of the groove 20 can be diversified on the basis of reducing the overall thickness of the groove area DD.

[0055] Continue to refer to Figure 9 , in the direction X perpendicular to the plane where the first bonding layer 110 is located, the first sub - part 2101 of the first groove is staggered from both the second groove 220 and the third groove 230. The second sub - part 2102 of the first groove overlaps with the second groove 220 and is staggered from the third groove 230. The second groove 220 overlaps with the first sub - part 2301 of the third groove and is staggered from the second sub - part 2302 of the third groove. The groove depth H1 - 1 of the first sub - part 2201 of the first groove is equal to the sum of the groove depth H1 - 2 of the second sub - part 2102 of the first groove and the groove depth H2 of the second groove 220, equal to the sum of the groove depth H3 - 1 of the first sub - part 2301 of the third groove and the groove depth H2 of the second groove 220, and equal to the groove depth H3 - 2 of the second sub - part 2302 of the third groove.

[0056] Specifically, as Figure 9As shown, in the direction Y parallel to the plane of the first adhesive layer 110, the first groove 210 and the third groove 230 are staggeredly arranged. The first sub - part 2101 of the first groove is staggered from both the second groove 220 and the third groove 230. The second sub - part 2102 of the first groove is staggered from the third groove. The second groove 220 is staggered from the second sub - part 2302 of the third groove. Along the direction X perpendicular to the plane of the first adhesive layer 110, the second sub - part 2102 of the first groove overlaps with the second groove 220, and the first sub - part 2301 of the third groove overlaps with the second groove 220. Thus, the corner area CC can be traversed by the first sub - part 2101 of the first groove, the second sub - part 2102 of the first groove, the second groove 220, the first sub - part 2301 of the third groove, and the second sub - part 2302 of the third groove. It can be understood that the second groove 220 and the third groove 230 are respectively translated upward along the direction X perpendicular to the plane of the first adhesive layer 110. Since the second groove 220 and the third groove 230 overlap, the overlapping structure formed by the second groove 220 and the third groove 230 after upward translation is in the same plane as the first groove 210. Also, because the groove depth H1 - 1 of the first sub - part 2201 of the first groove is equal to the sum of the groove depth H1 - 2 of the second sub - part 2102 of the first groove and the groove depth H2 of the second groove 220, and is also equal to the sum of the groove depth H3 - 1 of the first sub - part 2301 of the third groove and the groove depth H2 of the second groove 220, and is also equal to the groove depth H3 - 2 of the second sub - part 2302 of the third groove, that is, (H1 - 1)=(H1 - 2)+H2=(H3 - 2). Therefore, the combined grooves form a large groove that traverses the corner area CC and has a groove depth of H1 - 1. Compared with the prior - art solution without grooves in the corner area, the overall thickness of the corner area CC can be reduced by H1 - 1, so that the compression amount of the corner area CC is reduced, and further, the perimeter difference before and after the corner area CC is fitted and extruded is reduced, thereby further reducing the risk of wrinkles occurring in the corner area CC.

[0057] Figure 10 is Figure 1 Another cross - sectional schematic diagram along the AA' direction in Figure 10, in the direction X perpendicular to the plane of the first adhesive layer 110, the first sub-part 2101 of the first groove is offset from both the second groove 220 and the third groove 230, the second sub-part 2102 of the first groove overlaps with both the second groove 220 and the first sub-part 2301 of the third groove and is offset from the second sub-part 2302 of the third groove, the second groove 220 overlaps with the first sub-part 2301 of the third groove and is offset from the second sub-part 2302 of the third groove, the groove depth H1-1 of the first sub-part 2101 of the first groove is equal to the sum of the groove depth H1-2 of the second sub-part 2102 of the first groove, the groove depth H2 of the second groove 220, and the groove depth H3-1 of the first sub-part 2301 of the third groove, and is equal to the groove depth H3-2 of the second sub-part 2302 of the third groove.

[0058] Exemplarily, refer to Figure 10 , in the direction Y parallel to the plane of the first adhesive layer 110, the first sub-part 2101 of the first groove is offset from both the second groove 220 and the third groove 230, the second sub-part 2102 of the first groove is offset from the second sub-part 2302 of the third groove, the second groove 220 is offset from the second sub-part 2302 of the third groove, in the direction X perpendicular to the plane of the first adhesive layer 110, the first groove 210 overlaps with both the second groove 220 and the third groove 230. Specifically, the second sub-part 2102 of the first groove overlaps with both the second groove 220 and the first sub-part 2301 of the third groove, and the second groove 220 overlaps with the first sub-part 2301 of the third groove. Thus, the corner region CC can be traversed by the first sub-part 2101 of the first groove, the second sub-part 2102 of the first groove, the second groove 220, the first sub-part 2301 of the third groove, and the second sub-part 2302 of the third groove. It can be understood that the second groove 220 and the third groove 230 are respectively translated upward in the direction X perpendicular to the plane of the first adhesive layer 110. Since the second groove 220 and the third groove 230 overlap, the overlapping structure formed by the second groove 220 and the third groove 230 after upward translation is in the same plane as the first groove 210. Also, because the groove depth H1-1 of the first sub-part 2101 of the first groove is equal to the sum of the groove depth H1-2 of the second sub-part 2102 of the first groove, the groove depth H2 of the second groove 220, and the groove depth H3-1 of the first sub-part 2301 of the third groove, and is also equal to the groove depth H3-2 of the second sub-part 2302 of the third groove, that is, (H1-1) = (H1-2) + H2 + (H3-1) = (H3-2). Therefore, the combined grooves form a large groove that traverses the corner region CC with a groove depth of H1-1. Compared with the prior art solution without grooves in the corner region, the overall thickness of the corner region CC can be reduced by H1-1, so that the compression amount of the corner region CC is reduced, and further the perimeter difference before and after the corner region CC is pressed and fitted is reduced, thereby further reducing the risk of wrinkles occurring in the corner region CC.

[0059] It should be noted that in the above embodiments, the groove 20 of the present invention may penetrate through the adhesive layer 10 or may not penetrate through the adhesive layer 10. In addition, when the groove 20 does not penetrate through the adhesive layer 10, the groove 20 may be located on the upper surface, the middle position or the lower surface of the adhesive layer 10. The present invention does not limit this, and those skilled in the art can set it according to needs.

[0060] Based on the above embodiments, continue to refer to Figure 3 , the second adhesive layer 120 is located between the first adhesive layer 110 and the third adhesive layer 130. Specifically, the second adhesive layer 120 may be a polarizer adhesive layer. Then, by disposing the second adhesive layer between the first adhesive layer 110 and the third adhesive layer 130, it is ensured that the second adhesive layer 120 can normally bond the polarizer. The present invention does not limit the specific order of the adhesive layers 10. In other embodiments, the first adhesive layer 110, the second adhesive layer 120, and the third adhesive layer 130 may also have other sequential relationships, and those skilled in the art can set them according to needs.

[0061] Continue to refer to Figure 3 , the display device further includes a backplane 40, a display panel 50, and a polarizer 60. The polarizer 60 is located between the first adhesive layer 110 and the second adhesive layer 120. The display panel 50 is located between the second adhesive layer 120 and the third adhesive layer 130. The backplane 40 is located on the side of the third adhesive layer 130 away from the display panel 50. Specifically, the cover plate (not shown in the figure) and the polarizer 60 are bonded by the first adhesive layer 110, the display panel 50 and the polarizer 60 are bonded by the second adhesive layer 120, and the display panel 50 and the backplane 40 are bonded by the third adhesive layer 130 to ensure the normal bonding of the backplane 40, the display panel 50, and the polarizer 60.

[0062] It should be noted that since the corner region CC needs to be bent during fitting and extrusion, the backplane 40, the display panel 50, and the polarizer 60 located in the corner region CC may be made of flexible materials. While the main region AA does not need to be bent, so the materials of the display panel and the like in the main region are not limited.

[0063] Figure 11 is Figure 1 An enlarged structural diagram of region B in Figure 11 , the corner region CC has a curved edge, and the extending direction of the groove 20 is consistent with the extending direction of the curved edge. As Figure 11As shown, the extending direction of the groove 20 is consistent with that of the curved edge. Furthermore, by traversing the corner area CC through the first groove 210, the second groove 220, and the third groove 230, the overall thickness of the corner area CC can be reduced by H1, so that the compression amount of the corner area CC is reduced. Furthermore, the perimeter difference of the corner area CC before and after fitting and extrusion is reduced, thereby further reducing the risk of wrinkling in the corner area CC.

[0064] Figure 12 is Figure 1 Another enlarged structural diagram of area B in, see Figure 1 and Figure 12 , the corner area CC has a curved edge, and the groove 20 extends from the main area AA towards the curved edge. Specifically, the corner area CC is located at the four fixed-point positions of the display device. Furthermore, the corner area CC can be a fan-shaped area. Furthermore, the groove 20 can extend from the main area AA towards the curved edge, that is, along the radial direction of the fan-shaped area. By traversing the corner area CC through the radially extending first groove 210, the second groove 220, and the third groove 230, the overall thickness of the corner area CC can be reduced by H1, so that the compression amount of the corner area CC is reduced. Furthermore, the perimeter difference of the corner area CC before and after fitting and extrusion is reduced, thereby further reducing the risk of wrinkling in the corner area CC. In addition, since the radially extending groove 20 is from the main area AA towards the curved edge, it is beneficial to the heat dissipation of the display device.

[0065] It should be noted that Figure 11 and Figure 12 in order to illustrate the positional relationship of the groove 20, it is shown in the same plane. Those skilled in the art can understand that the first groove 210, the second groove 220, and the third groove 230 are located in different film layers.

[0066] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, it can also include more other equivalent embodiments, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display device, characterized in that, It includes a main area, a side area, and a corner area; the side area is located on the periphery of the main area, and the corner area connects the side areas on adjacent sides and includes a groove area; At least two bonding layers, the bonding layers having grooves in the groove area, including a first bonding layer and a second bonding layer; The grooves in the first bonding layer are denoted as first grooves, and first protrusions are formed between adjacent first grooves; The grooves in the second bonding layer are denoted as second grooves, and second protrusions are formed between adjacent second grooves; In the direction perpendicular to the plane of the first bonding layer, the first grooves overlap with the second protrusions, and / or the second grooves overlap with the first protrusions; The opening directions of the first grooves and the opening directions of the second grooves are the same; The first grooves include a first groove first sub - part and a first groove second sub - part, and the first groove first sub - part and the first groove second sub - part have different groove depths.

2. The display device according to claim 1, characterized in that, Within the groove area, the total thickness of the bonding layers at any two positions is equal; Wherein, the total thickness of the bonding layers is the sum of the thicknesses of each bonding layer in the direction perpendicular to the plane of the first bonding layer.

3. The display device according to claim 1, characterized in that, The groove area and the corner area have the same area range.

4. The display device according to claim 1, characterized in that, The at least two bonding layers further include a third bonding layer, the grooves in the third bonding layer are denoted as third grooves, and third protrusions are formed between adjacent third grooves; In the direction perpendicular to the plane of the first bonding layer, the third grooves overlap with the first protrusions and / or the second protrusions, and the third protrusions overlap with the first grooves and / or the second grooves.

5. The display device according to claim 4, wherein Both the second grooves and the third grooves include a single groove depth.

6. The display device according to claim 5, wherein, In the direction perpendicular to the plane of the first bonding layer, the first groove first sub - part is staggered from both the second grooves and the third grooves, the first groove second sub - part is staggered from the second grooves and overlaps with the third grooves, and the second grooves overlap with the third grooves; The groove depth of the first groove first sub - part is equal to the sum of the groove depth of the first groove second sub - part and the groove depth of the third groove, and is equal to the sum of the groove depth of the second groove and the groove depth of the third groove.

7. The display device according to claim 5, wherein In the direction perpendicular to the plane of the first bonding layer, the first groove first sub - part is staggered from both the second grooves and the third grooves, the first groove second sub - part overlaps with the second grooves and is staggered from the third grooves, and the second grooves are staggered from the third grooves; The groove depth of the first groove first sub - part is equal to the sum of the groove depth of the first groove second sub - part and the groove depth of the second groove, and is equal to the groove depth of the third groove.

8. The display device according to claim 4, wherein The third grooves include a third groove first sub - part and a third groove second sub - part, and the third groove first sub - part and the third groove second sub - part have different groove depths; The second grooves include a single groove depth.

9. The display device according to claim 8, wherein In a direction perpendicular to the plane of the first adhesive layer, the first sub - portion of the first groove is offset from both the second groove and the third groove, the second sub - portion of the first groove overlaps with the second groove and is offset from the third groove, the second groove overlaps with the first sub - portion of the third groove and is offset from the second sub - portion of the third groove; The groove depth of the first sub - portion of the first groove is equal to the sum of the groove depth of the second sub - portion of the first groove and the groove depth of the second groove, equal to the sum of the groove depth of the first sub - portion of the third groove and the groove depth of the second groove, and equal to the groove depth of the second sub - portion of the third groove.

10. The display device according to claim 8, characterized in that, In a direction perpendicular to the plane of the first adhesive layer, the first sub - portion of the first groove is offset from both the second groove and the third groove, the second sub - portion of the first groove overlaps with both the second groove and the first sub - portion of the third groove and is offset from the second sub - portion of the third groove, the second groove overlaps with the first sub - portion of the third groove and is offset from the second sub - portion of the third groove; The groove depth of the first sub - portion of the first groove is equal to the sum of the groove depth of the second sub - portion of the first groove, the groove depth of the second groove and the groove depth of the first sub - portion of the third groove, and equal to the groove depth of the second sub - portion of the third groove.

11. The display device according to claim 4, wherein The second adhesive layer is located between the first adhesive layer and the third adhesive layer.

12. The display device according to claim 11, wherein It further includes a backplane, a display panel and a polarizer; The polarizer is located between the first adhesive layer and the second adhesive layer, the display panel is located between the second adhesive layer and the third adhesive layer, and the backplane is located on the side of the third adhesive layer away from the display panel.

13. The display device according to claim 1, characterized in that, The corner region has a curved edge, and the extending direction of the groove is consistent with the extending direction of the curved edge.

14. The display device according to claim 1, wherein, The corner region has a curved edge, and the groove extends from the main region towards the curved edge.

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