Display panel and preparation method thereof

Abstract

The application provides a display panel and a preparation method thereof. The display panel comprises: a screen body comprising a display part, a bending part and a bonding part connected in sequence, the display part and the bonding part being arranged at a distance from each other, and the bending part being connected between the display part and the bonding part; a first support layer and a second support layer, the first support layer and the second support layer being arranged between the display part and the bonding part, the first support layer being attached to the display part, and the second support layer being attached to the bonding part; and wherein the projection of the bending part in a first direction and the projection of the display part in the first direction have an overlapping area. The display panel provided by the application can reduce the stress of the bending part under the condition of the same bending radius, thereby reducing the probability of metal trace fracture and film layer tearing in the bending part, and finally reducing the risk of black spots and bright lines; also, under the condition of the same stress, the bending radius can be reduced, which is conducive to realizing a narrower frame.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel and a method for manufacturing the same. Background Technology

[0002] OLED (Organic Light-Emitting Diode) is an active-matrix light-emitting device with a sandwich structure consisting of multiple organic layers and electrodes on both sides. Currently, AMOLED (Active-matrix organic light-emitting diode) based displays have been commercialized in fields such as smartphones, watches, and laptops.

[0003] However, the performance of existing displays needs to be improved. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a display panel that helps to reduce the stress and bending radius of the bending part, thereby achieving a narrower bezel.

[0005] For the purposes described above, this application provides a display panel comprising:

[0006] The screen body includes a display section, a bending section, and a bonding section connected in sequence. The display section and the bonding section are spaced apart from each other, and the bending section is connected between the display section and the bonding section. The projection of the display section in a first direction at least partially overlaps the projection of the bonding section in the first direction. The first direction is the thickness direction of the display panel.

[0007] A first support layer and a second support layer are disposed between the display portion and the bonding portion, wherein the first support layer is attached to the display portion and the second support layer is attached to the bonding portion; the projection of the first support layer in a first direction and the projection of the second support layer in the first direction at least partially overlap.

[0008] The projection of the bent portion in the first direction overlaps with the projection of the display portion in the first direction.

[0009] The bending portion includes a main bending portion and an over-stretched portion that are continuously arranged. The projection of the main bending portion in the first direction does not overlap with the projection of the display portion in the first direction, and the projection of the over-stretched portion in the first direction is located within the projection of the display portion in the first direction.

[0010] Preferably, the bending portion includes a wiring area, which is partially located in the main bending portion and partially located in the over-stretching portion.

[0011] In one embodiment, the thickness of the display panel and the bending radius of the main bending portion satisfy the following relationship:

[0012] 0.3d≤r4≤0.5d

[0013] Where d is the thickness of the display panel, and r4 is the bending radius of the main bending section.

[0014] In one embodiment, the projection of the over-pulled portion in the first direction is rectangular;

[0015] Preferably, the bending radius of the main bending portion is greater than the width of the rectangle;

[0016] Preferably, the width of the rectangle is 20-200 μm.

[0017] In one embodiment, the width of the bend is 500-1200 μm.

[0018] In one embodiment, the bent portion forms a free space with the first support layer and the second support layer, allowing the bent portion to bend freely.

[0019] In one embodiment, the bending portion includes a first end and a second end, the first end being connected to the display portion and the second end being connected to the bonding portion, the bending portion being freely bent such that the radius of curvature of the second end is greater than the radius of curvature of the first end.

[0020] In one embodiment, the display panel further includes:

[0021] The adhesive layer is partially located between the display portion and the first support layer, partially located between the bonding portion and the second support layer, and partially located on the inside of the bend of the bent portion.

[0022] In one embodiment, the first support layer and the second support layer are formed by etching the same support layer.

[0023] Based on the same inventive concept, this application also discloses a method for manufacturing a display panel, which includes:

[0024] A bendable display panel is provided, the bendable display panel includes a screen body and a support layer stacked together, wherein a display part, a bendable part and a bonding part are arranged sequentially on the screen body;

[0025] Set up a first support layer and a second support layer;

[0026] The portion to be bent is bent to form a bent portion, such that the display portion and the bonding portion are spaced apart from each other, and the projection of the display portion in a first direction at least partially overlaps with the projection of the bonding portion in the first direction; the first support layer and the second support layer are located between the display portion and the bonding portion, and the projection of the first support layer in the first direction at least partially overlaps with the projection of the second support layer in the first direction; wherein, the projection of the bent portion in the first direction and the projection of the display portion in the first direction have an overlapping area, and the first direction is the thickness direction of the display panel to be bent.

[0027] In one embodiment, setting the portion to be bent includes setting a main bending portion and setting an overstretch portion connected to the main bending portion;

[0028] The step of bending the portion to be bent to form a bent portion includes:

[0029] The portion to be bent is bent to form a bent portion, such that the projection of the main bent portion in the first direction does not overlap with the projection of the display portion in the first direction. The over-stretched portion is over-stretched to the bottom of the display portion, so that the projection of the over-stretched portion in the first direction is located within the projection of the display portion in the first direction.

[0030] In one embodiment, setting the first support layer and the second support layer includes: etching the support layer to remove the area on the support layer corresponding to the part to be bent, so as to form the first support layer on the support layer in the area corresponding to the display part, and to form the second support layer on the support layer in the area corresponding to the bonding part.

[0031] Based on the same inventive concept, this application also discloses a display device, which includes the display panel described in any of the above claims.

[0032] Compared with the prior art, the display panel provided in this application has an overlapping area between the projection of the bent portion in the first direction and the projection of the display portion in the first direction. That is, part of the bent portion is hidden to the non-display side of the display panel. Under the same bending radius, the stress of the bent portion can be reduced, thereby reducing the probability of metal trace breakage and film tearing in the bent portion, and ultimately reducing the risk of black spots and bright lines. Alternatively, under the same stress conditions, reducing the bending radius is beneficial to achieving a narrower bezel. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a related display panel before it is bent.

[0035] Figure 2 for Figure 1 A schematic diagram of the layer structure of the central display panel;

[0036] Figure 3 This is a schematic diagram of a related display panel after it has been bent.

[0037] Figure 4 for Figure 3 A schematic diagram of the layer structure of the central display panel;

[0038] Figure 5 This is a schematic diagram of the layer structure of another related display panel after bending.

[0039] Figure 6 This is a schematic diagram of the layer structure of another related display panel after bending.

[0040] Figure 7 This is a schematic diagram of the layer structure of a display panel after bending, provided in one embodiment of this application;

[0041] Figure 8 for Figure 7 A schematic diagram of the layer structure of the display panel before it is bent.

[0042] Figure 9 for Figure 8 A schematic diagram of the layer structure of the display panel before the slotted area is formed;

[0043] Figure 10 This is a schematic diagram of the layer structure of the display panel before bending, provided in another embodiment of this application;

[0044] Figure 11 A flowchart illustrating a method for manufacturing a display panel according to another embodiment of this application.

[0045] Marker explanation:

[0046] 100. Display panel; 1. Screen body; 10. Display part; 20. Bending part; 21. First end; 22. Second end; 23. Main bending part; 24. Overstretching part; 30. Bonding part; 40. Slotted area; 50. Support layer; 51. First support layer; 52. Second support layer; 60. Free space; 70. Adhesive layer; 80. Part to be bent; 200. Display panel to be bent. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0048] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] Please refer to Figure 1 and 2 As shown, a related display panel 100 is provided. The display panel 100 includes a screen body 1, which includes a display part 10, a bending part 20 and a bonding part 30. The display part 10 is provided with a signal terminal, and the bonding part 30 is provided with a bonding electrode. The signal terminal and the bonding electrode are electrically connected through a signal line.

[0050] To reduce the bezel (typically the bottom bezel) of the display panel 100, the bonding portion 30 needs to be bent to the back of the display panel 100. Since the support layer 50 has relatively high rigidity, therefore, referring to... Figure 2 As shown, in order to achieve the required bending radius, the area corresponding to the bending portion 20 on the support layer 50 needs to be removed to form a slotted area 40. Then, the bending portion 20 is bent. The bent display panel 100 is shown in the figure. Figure 3 and 4 As shown. The width of the slotted area 40 is D1, and the width of the slotted area 40 determines the width of the bent part 20.

[0051] Please refer to Figure 4As shown, in a related display panel 100, the bending portion 20 is bent into a semicircular arc with point O as the center and radius r1, where r1 is the bending radius. At the starting position of the bend (positions a1 and b1 in the figure), the screen 1 changes abruptly from a flat state to an arc state, and the thickness of the support layer 50 also changes abruptly. Therefore, stress concentration occurs at the starting position of the bend, and since the thickness of the screen 1 is usually very thin, it is easy for the signal lines on the screen 1 to break; especially when adjusting the bending shape, the display portion 10 and the bonding portion 30 will be bent along the curve. Figure 4 The relative movement of the -X and X directions makes it easier for the screen 1 to be subjected to greater forces at positions a1 and b1, which can lead to signal line breakage.

[0052] Please refer to Figure 5 As shown, in another related display panel 100, while keeping the thickness d of the display panel 100 constant, the width of the slotted area 40 is increased, that is, the width of the bent portion 20 is increased, so that the bent portion 20 is bent into an elliptical arc. At this time, the stress at position a2 is less than Figure 4 The stress at position a1 is less than the stress at position b2. Figure 4 The stress at position b1. However, the trade-off is that the bending radius r2 is greater than... Figure 4 The bending radius r1 in the middle is not conducive to achieving a narrow bezel.

[0053] Please refer to Figure 6 As shown, in another related display panel 100, while keeping the thickness d of the display panel 100 constant, the width of the slotted area 40 is reduced, that is, the width of the bent portion 20 is reduced, so that the bent portion 20 is bent into an elliptical arc. At this time, the bending radius r3 is less than Figure 4 The bending radius r1 in the middle is beneficial for achieving a narrower bezel. However, it will cause the stress at position a3 to be greater than that at position a3. Figure 4 The stress at position a1 is greater than the stress at position b3. Figure 4 The stress at position b1 makes it easier for the signal lines on screen 1 to break.

[0054] Therefore, how to reduce the stress of the bending part 20 while achieving a narrow bezel is an urgent problem to be solved.

[0055] Therefore, this application provides a display panel solution to address the aforementioned problems.

[0056] Please refer to Figure 7As shown, a display panel 100 provided in an embodiment of this application includes a screen body 1, a first support layer 51, and a second support layer 52. The screen body 1 includes a display portion 10, a bending portion 20, and a bonding portion 30 connected in sequence. The display portion 10 and the bonding portion 30 are spaced apart from each other, and the bending portion 20 is connected between the display portion 10 and the bonding portion 30. The first support layer 51 and the second support layer 52 are disposed between the display portion 10 and the bonding portion 30, and the first support layer 51 is attached to the display portion 10, and the second support layer 52 is attached to the bonding portion 30. The projection of the display portion 10 in a first direction (as shown in the figure, -Y or Y direction) at least partially overlaps with the projection of the bonding portion 30 in the first direction, and the projection of the first support layer 51 in the first direction at least partially overlaps with the projection of the second support layer 52 in the first direction. The first direction is the thickness direction of the display panel. The projection of the bending portion 20 in the first direction overlaps with the projection of the display portion 10 in the first direction.

[0057] The display panel 100 provided in this embodiment has an overlapping area between the projection of the bent portion 20 in the first direction and the projection of the display portion 10 in the first direction. That is, a part of the bent portion 20 is hidden to the non-display side of the display panel 100. Under the same bending radius, the stress of the bent portion 20 can be reduced, thereby reducing the probability of metal trace breakage and film tearing in the bent portion 20, and ultimately reducing the risk of black spots and bright lines. Alternatively, reducing the bending radius under the same stress conditions is beneficial to achieving a narrower bezel.

[0058] Please continue to refer to Figure 7 As shown, in one embodiment, the bending portion 20 includes a continuously arranged main bending portion 23 and an over-stretched portion 24. The projection of the main bending portion 23 in the first direction does not overlap with the projection of the display portion 10 in the first direction, and the projection of the over-stretched portion 24 in the first direction is located within the projection of the display portion 10 in the first direction. That is, the second support layer 52 contracts in the X direction relative to the first support layer 51. (Refer to...) Figure 4-6 As shown, in the direction perpendicular to the display panel 100 (Y and Y directions in the figure), the left side of the second support layer 52 is flush with the left side of the first support layer 51, ensuring that the bent portion 20 has a symmetrical structure. In this embodiment, the left side of the second support layer 52 is vertically offset from the left side of the first support layer 51, which hides part of the bent portion 20 to the non-display side (back side) of the display panel 100. This allows the width of the bent portion 20 to be larger under the same bending radius, increasing the buffer range at positions a4 and b4 during the bending process, effectively reducing the stress at positions a4 and b4 during the bending process, and also reducing the bending radius under the same stress conditions, which is beneficial for achieving a narrower bezel.

[0059] Preferably, the bending portion 20 includes a wiring area, partly located in the main bending portion 23 and partly located in the over-pulling portion 24. The wiring area is used to implement metal traces, and the entire bending portion 20 is a wiring area to ensure stable signal transmission between the display portion 10 and the bonding portion 30.

[0060] Please continue to refer to Figure 7 As shown, in one embodiment, the thickness of the display panel 100 and the bending radius of the main bending portion 23 satisfy the following relationship:

[0061] 0.3d≤r4≤0.5d

[0062] Where d is the thickness of the display panel 100, and r4 is the bending radius of the main bending portion 23. Under this relationship, the bending radius of the main bending portion 23 can be ensured to be sufficiently small, while reducing the stress on the bending portion 20. The bending radius r4 of the main bending portion 23 determines the bezel width of the display panel 100; the smaller the bending radius r4 of the main bending portion 23, the smaller the bezel width of the display panel 100.

[0063] Alternatively, r4 = 0.3d, r4 = 0.35d, r4 = 0.4d, r4 = 0.45d, r4 = 0.5d, etc.

[0064] In one embodiment, the projection of the over-stretched portion 24 in the first direction is rectangular; this means that the width of the over-stretched portion 24 is constant along the direction perpendicular to the XY plane, ensuring that the bending radius of the main bending portion 23 remains constant along the direction perpendicular to the XY plane, thereby ensuring the consistency of the width of the bezel of the display panel 100.

[0065] Preferably, the width s of the rectangle is 20-200 μm, for example, it can be 20 μm, 50 μm, 80 μm, 150 μm, 200 μm, etc. Within this width range, the stress borne by the bending portion 20 can be effectively reduced. In other embodiments, the width of the rectangle can be set as needed, and there is no specific limitation.

[0066] Preferably, the width of the bending portion 20 is 500-1200 μm, for example, it can be 500 μm, 800 μm, 1000 μm, 1200 μm, etc. Within this width range, the bending radius of the main bending portion 23 can be better kept within a preset range, and the stress of the bending portion 20 can also be kept within a preset range. In other embodiments, the width of the bending portion 20 can be set as needed, and is not specifically limited.

[0067] Preferably, the bending radius of the main bending portion 23 is greater than the width s of the rectangle, so as to avoid excessive stress at the end where the bending portion 20 is connected to the display portion 10.

[0068] Please continue to refer to Figure 7As shown, the bent portion 20 forms a free space 60 with the first support layer 51 and the second support layer 52, allowing the bent portion 20 to bend freely, which facilitates the adjustment of the bending radius. At the same time, no additional support structure is required, thus avoiding increased process complexity and cost.

[0069] Specifically, a free space 60 is formed between the inner side of the bend facing the bend portion 20 and the first support layer 51 and the second support layer 52, so that the bend portion 20 is supported and positioned only by the two ends connected to the first support layer 51 and the second support layer 52 respectively, which facilitates the adjustment of the relative position of the display portion 10 and the bonding portion 30 along the -X and X directions, thereby realizing the adjustment of the bending radius r4.

[0070] Please continue to refer to Figure 7 As shown, in one embodiment, the bending portion 20 includes a first end 21 and a second end 22. The first end 21 is connected to the display portion 10, and the second end 22 is connected to the bonding portion 30. The bending portion 20 can be bent freely, such that the radius of curvature of the second end 22 is greater than the radius of curvature of the first end 21, ensuring that the stress at position b4 in the second end 22 can be significantly reduced. Simultaneously, since a portion of the bending portion 20 is hidden on the non-display side of the display panel 100, the width of the bending portion 20 can be made larger while satisfying the bending radius requirement. This increases the buffer range of the first end 21 and the second end 22 during the bending process, thereby reducing the stress at position a4 in the first end 21.

[0071] For ease of understanding, relative to Figure 6 Display panel 100 in the middle, Figure 7 The display panel 100 in this case is equivalent to increasing the width of the bent portion 20 by a certain amount, denoted as s. This increase in width leads to a larger buffer range for the first end 21 and the second end 22 during the bending process, thereby significantly reducing the stress at position a4 in the first end 21 and position b4 in the second end 22. Simultaneously, a portion of the bent portion 20 is hidden on the non-display side of the display panel 100, avoiding an increase in the bending radius. Therefore, relative to... Figure 6 The display panel 100 in this embodiment can effectively reduce the stress borne by the bending part 20 under the same bending radius, thereby reducing the probability of metal trace breakage and film tearing in the bending part 20, and ultimately reducing the risk of black spots and bright lines.

[0072] Compared to Figure 5 Display panel 100 in the middle, Figure 7 The display panel 100 in the middle is equivalent to keeping the width of the bent portion 20 unchanged, and hiding part of the width of the bent portion 20 to the non-display side of the display panel 100, similar to putting Figure 5The second support layer 52 and the bonding part 30 are pulled in the X direction by a distance of s, thereby reducing the bending radius from r2 to r4. This achieves a significant reduction in the bending radius without causing a significant increase in the stress on the bending part 20.

[0073] Similarly, relative to Figure 4 Display panel 100 in the middle, Figure 7 The display panel 100 can reduce the bending radius and reduce the stress on the bending part 20.

[0074] Reference Figure 8 The diagram shown is a schematic representation of the structure of the display panel 100 before bending in one embodiment of this application. The width of the slotted area 40 is D2, and the bending portion 20 corresponds to the portion to be bent 80; that is, the width of the bending portion 20 is D2 relative to... Figure 4 and Figure 6 In this embodiment, the display panel 100 is equivalent to increasing the width of the slotted area 40 and hiding the increased width portion on the non-display side of the display panel 100. Relative to... Figure 5 In this embodiment, the display panel 100 has the width of the slotted area 40 unchanged, but only hides part of the width of the slotted area 40 to the non-display side of the display panel 100.

[0075] Table 1

[0076]

[0077]

[0078] Referring to Table 1, in order to prove the effectiveness of the present invention, the inventors verified the display panel of the present invention with several related display panels. It can be seen that the display panel of the present invention can significantly reduce the stress of the bending portion 20, especially the stress at both ends of the bending portion 20.

[0079] Reference Figure 9 As shown, in one embodiment, the first support layer 51 and the second support layer 52 are formed by etching the same support layer 50, which greatly simplifies the fabrication process and reduces the difficulty of fabrication. Specifically, a grooved area 40 is etched into the support layer 50, and then the bent portion 20 is bent. The first support layer 51 and the second support layer 52 have the same thickness after fabrication, thus achieving the same support effect.

[0080] Reference Figure 10As shown, in another embodiment, the display panel 100 further includes an adhesive layer 70. The adhesive layer 70 is partially located between the display portion 10 and the first support layer 51, partially located between the bonding portion 30 and the second support layer 52, and partially located on the inner side of the bend in the bending portion 20. The adhesive layer 70 is used to bond the screen body 1 to the support layer 50. Additionally, when the slotted area 40 is formed, the adhesive layer 70 can prevent damage to the screen body 1.

[0081] Based on the same inventive concept, another embodiment of this application discloses a method for manufacturing a display panel, the method comprising the following steps:

[0082] Step S10: Provide a display panel 200 to be bent. The display panel 200 includes a screen body 1 and a support layer 50 stacked together. A display section 10, a bending section 80, and a bonding section 30 are sequentially connected on the screen body 1. The display panel 200 to be bent can be referred to... Figure 9 .

[0083] Step S20: Set the first support layer 51 and the second support layer 52.

[0084] Optionally, step S20, setting the first support layer 51 and the second support layer 52, includes: etching the support layer 50 to remove the area on the support layer 50 corresponding to the portion to be bent 80, so that the first support layer 51 is formed on the support layer 50 in the area corresponding to the display portion 10, and the second support layer 52 is formed on the support layer 50 in the area corresponding to the bonding portion 30. Specifically, refer to... Figure 8 After etching the support layer 50, a grooved area 40 is formed. The purpose of the groove is to remove the area on the harder support layer 50 corresponding to the part to be bent 80, so that the part to be bent 80 can be bent in the next step.

[0085] Step S30: Bend the portion 80 to be bent to form a bent portion 20, such that the display portion 10 and the bonding portion 30 are spaced apart from each other, and the projection of the display portion 10 in the first direction at least partially overlaps with the projection of the bonding portion 30 in the first direction; the first support layer 51 and the second support layer 52 are located between the display portion 10 and the bonding portion 30, and the projection of the first support layer 51 in the first direction at least partially overlaps with the projection of the second support layer 52 in the first direction; wherein, the projection of the bent portion 20 in the first direction overlaps with the projection of the display portion 10 in the first direction, and the first direction is the thickness direction of the display panel 200 to be bent. Specifically, refer to... Figure 7 , which is the bent display panel 100.

[0086] The display panel manufacturing method provided in this embodiment produces a display panel 100 in which the projection of the bent portion 20 in the first direction overlaps with the projection of the display portion 10 in the first direction. That is, a part of the bent portion 20 is hidden to the non-display side of the display panel 100. Under the same bending radius, the stress of the bent portion 20 can be reduced, thereby reducing the probability of metal trace breakage and film tearing in the bent portion 20, and ultimately reducing the risk of black spots and bright lines. Alternatively, reducing the bending radius under the same stress conditions is beneficial to achieving a narrower bezel.

[0087] Reference Figure 7 As shown, in one embodiment, the portion to be bent 80 includes a main bending portion 23 and a pull portion 24 connected to the main bending portion 23. Step S30, bending the portion to be bent 80 to form a bending portion 20, includes:

[0088] The portion to be bent 80 is bent to form a bent portion 20, so that the projection of the main bent portion 23 in the first direction does not overlap with the projection of the display portion 10 in the first direction. The overstretched portion 24 is then overstretched to below the display portion 10, so that the projection of the overstretched portion 24 in the first direction is within the projection of the display portion 10 in the first direction. That is, the second support layer 52 contracts relative to the first support layer 51 in the X direction. (Refer to...) Figure 4-6 As shown, in the direction perpendicular to the display panel 100 (Y and Y directions in the figure), the left side of the second support layer 52 is flush with the left side of the first support layer 51, ensuring that the bent portion 20 has a symmetrical structure. In this embodiment, the left side of the second support layer 52 is vertically offset from the left side of the first support layer 51, which hides part of the bent portion 20 to the non-display side (back side) of the display panel 100. This allows the width of the bent portion 20 to be larger under the same bending radius, increasing the buffer range at positions a4 and b4 during the bending process, effectively reducing the stress at positions a4 and b4 during the bending process, and also reducing the bending radius under the same stress conditions, which is beneficial for achieving a narrower bezel.

[0089] Please continue to refer to Figure 7 As shown, in the display panel 100 after bending in step S30, the bent part 20 forms a free space 60 with the first support layer 51 and the second support layer 52, allowing the bent part 20 to bend freely, which facilitates the adjustment of the bending radius. At the same time, no additional support structure is needed, thus avoiding increased process complexity and cost.

[0090] Specifically, in the display panel 100 after bending in step S30, a free space 60 is formed between the inner side of the bend facing the bent portion 20 and the first support layer 51 and the second support layer 52, so that the bent portion 20 is supported and positioned only by the two ends connected to the first support layer 51 and the second support layer 52 respectively, which facilitates the adjustment of the relative position of the display portion 10 and the bonding portion 30 along the -X and X directions, thereby realizing the adjustment of the bending radius r4.

[0091] Based on the same inventive concept, another embodiment of this application discloses a display device, which includes the display panel in the above embodiment. Furthermore, the display device includes mobile phones, VR devices, computers, televisions, in-vehicle display devices, etc.

[0092] This embodiment provides a display device in which the projection of the bent portion 20 in the first direction overlaps with the projection of the display portion 10 in the first direction in the display panel 100. That is, a part of the bent portion 20 is hidden to the non-display side of the display panel 100. Under the same bending radius, the stress of the bent portion 20 can be reduced, thereby reducing the probability of metal trace breakage and film tearing in the bent portion 20, and ultimately reducing the risk of black spots and bright lines. Alternatively, reducing the bending radius under the same stress condition is beneficial to achieving a narrower bezel and improving the performance of the display device.

[0093] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0094] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0095] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, include: The screen body includes a display section, a bending section, and a bonding section connected in sequence. The display section and the bonding section are spaced apart from each other, and the bending section is connected between the display section and the bonding section. The projection of the display section in a first direction at least partially overlaps the projection of the bonding section in the first direction. The first direction is the thickness direction of the display panel. A first support layer and a second support layer are disposed between the display portion and the bonding portion, wherein the first support layer is attached to the display portion and the second support layer is attached to the bonding portion; the projection of the first support layer in a first direction and the projection of the second support layer in the first direction at least partially overlap. Wherein, the projection of the bent portion in the first direction overlaps with the projection of the display portion in the first direction; The bending portion includes a first end and a second end. The first end is connected to the display portion, and the second end is connected to the bonding portion. The bending portion forms a free space with the first support layer and the second support layer, allowing the bending portion to bend freely, such that the radius of curvature of the second end is greater than the radius of curvature of the first end. The bending portion includes a continuously arranged main bending portion and a stretching portion. The projection of the main bending portion in the first direction does not overlap with the projection of the display portion in the first direction. The projection of the stretching portion in the first direction is located within the projection of the display portion in the first direction. The projection of the stretching portion in the first direction does not overlap with the projection of the second support layer in the first direction. The stretching portion protrudes in a direction away from the display portion. The radius of curvature of the stretching portion is greater than the radius of curvature of the main bending portion. The projection of the side of the first support layer near the bend in the first direction and the projection of the side of the second support layer near the bend in the first direction are misaligned. The side of the second support layer near the bend is recessed inward in a direction away from the bend relative to the side of the first support layer near the bend. The distance between the projection of the side of the second support layer near the bend in the first direction and the projection of the side of the first support layer near the bend in the first direction in the arrangement direction of the overstretched portion and the bonding portion is equal to the size of the overstretched portion in the arrangement direction of the overstretched portion and the bonding portion.

2. The display panel according to claim 1, characterized in that, The bending portion includes a wiring area, which is partially located in the main bending portion and partially located in the over-stretching portion.

3. The display panel according to claim 1, characterized in that, The thickness of the display panel and the bending radius of the main bending portion satisfy the following relationship: 0.3d≤r4≤0.5d Where d is the thickness of the display panel, and r4 is the bending radius of the main bending section.

4. The display panel according to claim 1, characterized in that, The projection of the overstretched portion in the first direction is rectangular.

5. The display panel according to claim 4, characterized in that, The bending radius of the main bending portion is greater than the width of the rectangle, and the width of the rectangle is the dimension of the rectangle in the arrangement direction of the over-stretch portion and the bonding portion.

6. The display panel according to claim 4, characterized in that, The width of the rectangle is 20-200 μm.

7. The display panel according to claim 1, characterized in that, The width of the bent portion is 500-1200μm.

8. The display panel according to claim 1, characterized in that, The display panel also includes: The adhesive layer is partially located between the display portion and the first support layer, partially located between the bonding portion and the second support layer, and partially located on the inside of the bend of the bent portion.

9. The display panel according to claim 8, characterized in that, The first support layer and the second support layer are formed by etching the same support layer.

10. The display panel according to claim 1, characterized in that, The projection of the side of the overstretched portion away from the bonding portion in the first direction is aligned with the projection of the side of the first support layer near the main bending portion in the first direction. The projection of the side of the overstretched portion near the bonding portion in the first direction is aligned with the projection of the side of the second support layer near the main bending portion in the first direction. The projection of the portion of the first support layer protruding toward the bend relative to the side of the second support layer near the bend in the first direction covers the projection of the overstretched portion in the first direction. The projection of the side of the display unit near the main bending portion in the first direction is aligned with the projection of the side of the first support layer near the main bending portion in the first direction. The projection of the side of the bonding portion near the main bend in the first direction is aligned with the projection of the side of the second support layer near the main bend in the first direction.

11. The display panel according to claim 1, characterized in that, The first support layer has no contact with the bent portion, and the second support layer has no contact with the bent portion; The projection of the main bending portion in the first direction does not overlap with the projection of the first support layer in the first direction. The first support layer is flat on the side near the bend, and the second support layer is flat on the side near the bend.

12. A display panel, characterized in that, include: The screen body includes a display section, a bending section, and a bonding section connected in sequence. The display section and the bonding section are spaced apart from each other, and the bending section is connected between the display section and the bonding section. The projection of the display section in a first direction at least partially overlaps the projection of the bonding section in the first direction. The first direction is the thickness direction of the display panel. A first support layer and a second support layer are disposed between the display portion and the bonding portion, wherein the first support layer is attached to the display portion and the second support layer is attached to the bonding portion; the projection of the first support layer in a first direction and the projection of the second support layer in the first direction at least partially overlap. Wherein, the projection of the bent portion in the first direction overlaps with the projection of the display portion in the first direction; The bending portion includes a first end and a second end. The first end is connected to the display portion, and the second end is connected to the bonding portion. The radius of curvature of the second end is greater than the radius of curvature of the first end. The bending portion includes a main bending portion and a pull portion that are continuously arranged. The projection of the main bending portion in the first direction does not overlap with the projection of the display portion in the first direction, and the projection of the pull portion in the first direction is located within the projection of the display portion in the first direction. The over-pull portion protrudes in a direction away from the display portion; The radius of curvature of the over-stretched section is greater than the radius of curvature of the main bending section; The first support layer is not in contact with the bending portion, the second support layer is not in contact with the bending portion, and the projection of the side of the overstretched portion away from the bonding portion in the first direction is aligned with the projection of the side of the first support layer near the main bending portion in the first direction. The projection of the side of the first support layer near the bend in the first direction and the projection of the side of the second support layer near the bend in the first direction are offset; the side of the second support layer near the bend is recessed inward relative to the side of the first support layer near the bend in a direction away from the bend. The distance between the projection of the side of the second support layer near the bend in the first direction and the projection of the side of the first support layer near the bend in the first direction in the arrangement direction of the overstretched portion and the bonding portion is equal to the size of the overstretched portion in the arrangement direction of the overstretched portion and the bonding portion.

13. A method for manufacturing a display panel, characterized in that, include: A bendable display panel is provided, the bendable display panel includes a screen body and a support layer stacked together, wherein a display part, a bendable part and a bonding part are arranged sequentially on the screen body; A first support layer and a second support layer are provided to bend the portion to be bent to form a bent portion, such that the display portion and the bonding portion are spaced apart from each other, and the projection of the display portion in a first direction at least partially overlaps with the projection of the bonding portion in the first direction; the first support layer and the second support layer are located between the display portion and the bonding portion, and the projection of the first support layer in the first direction at least partially overlaps with the projection of the second support layer in the first direction; wherein, the projection of the bent portion in the first direction overlaps with the projection of the display portion in the first direction, and the first direction is the thickness direction of the display panel to be bent; the bent portion includes a first end and a second end, the first end is connected to the display portion, the second end is connected to the bonding portion, and the bent portion forms a free space with the first support layer and the second support layer, allowing the bent portion to bend freely, such that the radius of curvature of the second end is greater than the radius of curvature of the first end; Setting the part to be bent includes setting a main bending part and setting an over-stretching part connected to the main bending part; The step of bending the portion to be bent to form a bent portion includes: The portion to be bent is bent to form a bent portion, such that the projection of the main bent portion in the first direction does not overlap with the projection of the display portion in the first direction. The over-stretched portion is then stretched to below the display portion, so that the projection of the over-stretched portion in the first direction lies within the projection of the display portion in the first direction. The projection of the over-stretched portion in the first direction does not overlap with the projection of the second support layer in the first direction, and the over-stretched portion protrudes in a direction away from the display portion. The radius of curvature of the over-stretched portion is greater than the radius of curvature of the main bent portion. The projections of the first support layer near the bent portion in the first direction and the second support layer near the bent portion in the first direction are misaligned. The side of the second support layer near the bent portion is recessed inward relative to the side of the first support layer near the bent portion in a direction away from the bent portion. The distance between the projection of the side of the second support layer near the bend in the first direction and the projection of the side of the first support layer near the bend in the first direction in the arrangement direction of the overstretched portion and the bonding portion is equal to the size of the overstretched portion in the arrangement direction of the overstretched portion and the bonding portion.

14. The method for manufacturing a display panel as described in claim 13, characterized in that, The provision of the first support layer and the second support layer includes: etching the support layer to remove the area on the support layer corresponding to the part to be bent, so as to form the first support layer on the support layer in the area corresponding to the display part, and to form the second support layer on the support layer in the area corresponding to the bonding part.

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