Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises a screen body, the screen body comprises a display part, a bending part and a bonding part which are sequentially connected, the display part and the bonding part are stacked and arranged at intervals, and the bending part is connected between the display part and the bonding part; the supporting layer is arranged between the display part and the bonding part and is attached to the display part; the supporting body is in contact with the inner surface, close to the supporting layer, of the bending part and is used for fixing the bending form of the bending part to a target bending form; in the target bending state, the bending part comprises a first cambered surface part, a plane part and a second cambered surface part, the first cambered surface part is connected with the display part, the second cambered surface part is connected with the bonding part, and the plane part is connected between the first cambered surface part and the second cambered surface part. According to the display panel, the bending form of the bending part is fixed by arranging the supporting body, so that the bending radius of the bending part can be effectively reduced, a narrower frame is realized, and the performance of the display panel is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] OLED (Organic Light-Emitting Diode) is an active light-emitting device with a sandwich structure consisting of multiple organic layers and electrodes on both sides. At present, display screens based on AMOLED (Active-matrix organic light-emitting diode) have been commercialized in the fields of smart phones, 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 the present application is to provide a display panel that is conducive to reducing the bending radius of the bending portion, thereby achieving a narrower frame.

[0005] Based on the above purpose, the present application provides a display panel, which includes:

[0006] A screen body, the screen body comprising a display portion, a bending portion and a bonding portion connected in sequence, the display portion and the bonding portion are stacked and spaced from each other, and the bending portion is connected between the display portion and the bonding portion;

[0007] A supporting layer, the supporting layer is disposed between the display portion and the bonding portion and is bonded to the display portion;

[0008] A support body, the support body being in contact with an inner surface of the bending portion close to the support layer;

[0009] The bending portion includes a first arc portion, a plane portion, and a second arc portion. The first arc portion is connected to the display portion, the second arc portion is connected to the bonding portion, and the plane portion is connected between the first arc portion and the second arc portion.

[0010] In one embodiment, the display panel further includes:

[0011] A padding block is arranged between the supporting layer and the bonding portion.

[0012] In one embodiment, the padding block extends toward the bending portion and forms the support body;

[0013] In one embodiment, the support body and the raising block are made of the same material and are integrally formed.

[0014] In one embodiment, a transition arc surface is provided between a side of the support body away from the bending portion and a side of the padding block away from the bonding portion.

[0015] In one embodiment, a side of the pad block close to the bonding portion is in contact with the bonding portion;

[0016] In one embodiment, a side of the raising block close to the bonding portion is bonded to the bonding portion by glue.

[0017] In one embodiment, the plane where the side surface of the planar portion is located is perpendicular to the first plane; wherein the first plane is the plane where the side surface of the display portion is located;

[0018] In one embodiment, the radius of curvature of the first curved surface portion is the same as the radius of curvature of the second curved surface portion, and the orthographic projection of the first curved surface portion on the first plane completely overlaps with the orthographic projection of the second curved surface portion on the first plane.

[0019] In one embodiment, the support body includes a first supporting arc surface, a supporting plane, and a second supporting arc surface, the first supporting arc surface contacts the inner surface of the first arc surface portion close to the supporting layer, the supporting plane contacts the inner surface of the plane portion close to the supporting layer, and the second supporting arc surface contacts the inner surface of the second arc surface portion close to the supporting layer.

[0020] In one embodiment, the first supporting arc surface and the inner surface of the first arc surface portion close to the supporting layer are bonded by glue;

[0021] In one embodiment, the support plane and the inner surface of the plane portion close to the support layer are bonded by glue;

[0022] In one embodiment, the second supporting arc surface and the inner surface of the second arc surface portion close to the supporting layer are bonded by glue.

[0023] In one embodiment, the display panel further includes:

[0024] A composite film layer is located between the bonding portion and the supporting layer.

[0025] In one embodiment, the composite film layer includes a SCF component, and the SCF component includes an adhesive layer, a buffer layer, and a metal layer stacked in sequence.

[0026] Based on the same inventive concept, the present application also discloses a display device, which includes any one of the display panels described above.

[0027] Compared with the prior art, the display panel provided in the present application fixes the bending portion to the target bending shape through a supporting body, so that the bending portion forms a first arc portion, a planar portion and a second arc portion, wherein the existence of the planar portion can effectively reduce the bending radius of the bending portion, thereby achieving a narrower frame, and at the same time, avoids reducing the thickness of the display panel and affecting the performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 is a schematic diagram of a related display panel before being bent;

[0030] Figure 2 for Figure 1 Schematic diagram of the layer structure of the display panel;

[0031] Figure 3 is a schematic diagram of a related display panel after being bent;

[0032] Figure 4 for Figure 3 Schematic diagram of the layer structure of the display panel;

[0033] Figure 5 is a schematic diagram of the layer structure of another related display panel after being bent;

[0034] Figure 6 A schematic diagram of the layer structure of a display panel after being bent according to an embodiment of the present application;

[0035] Figure 7 A schematic diagram of the structure of a support body provided in one embodiment of the present application;

[0036] Figure 8 A schematic diagram of the layer structure of a display panel after being bent provided by another embodiment of the present application;

[0037] Fig. 9 A schematic diagram of the structure of a support body and a padding block provided in another embodiment of the present application;

[0038] Fig.10 A schematic diagram of the layer structure of a display panel after being bent provided by another embodiment of the present application;

[0039] Fig.11 A schematic diagram of the structure of a composite membrane layer provided in another embodiment of the present application.

[0040] Marking Description:

[0041] 100. Display panel; 1. Screen body; 11. Display part; 12. Bending part; 121. First arc part; 122. Plane part; 123. Second arc part; 13. Bonding part; 2. Support layer; 21. Slotted area; 3. Support body; 31. First support arc surface; 32. Support plane; 33. Second support arc surface; 4. Heightening block; 41. Transition arc surface; 5. Composite film layer; 51. Adhesive layer; 52. Buffer layer; 53. Metal layer. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0043] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like 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.

[0044] Please refer to Figure 1 and 2 As shown, a related display panel 100 includes a screen body 1, the screen body 1 includes a display part 11, a bending part 12 and a bonding part 13, a signal terminal is arranged in the display part 11, a bonding pad is arranged in the bonding part 13, and the signal terminal and the bonding pad are electrically connected through a signal line.

[0045] In order to reduce the frame (usually the lower frame) of the display panel 100, the bonding portion 13 needs to be bent to the back of the display panel 100. Since the hardness of the support layer 2 is relatively large, Figure 2As shown, in order to achieve the desired bending radius, the area corresponding to the bending portion 12 on the support layer 2 needs to be removed to form a groove area 21, and then the bending portion 12 is bent. The display panel 100 after bending is shown in FIG. Figure 3 and 4 shown.

[0046] Reference Figure 4 As shown, after the display panel 100 is bent, the display portion 11 and the bonding portion 13 are stacked and spaced from each other, and the bending portion 12 is connected between the display portion 11 and the bonding portion 13. The grooved area 21 divides the support layer 2 into two parts, one part of the support layer 2 is attached to the display portion 11, and the other part of the support layer 2 is attached to the bonding portion 13. The bending portion 12 is bent into a semicircular arc with a point o as the center and a radius of r1, wherein r1 is the bending radius. The smaller the bending radius r1, the narrower the frame of the display panel 100.

[0047] Please refer to Figure 5 As shown, in another related display panel 100, the bending radius is reduced by reducing the thickness of the display panel 100 to achieve a narrow frame, where d is the thickness of the display panel 100. Since after bending, a film layer for providing support, buffering and heat dissipation is also provided between the display portion 11 and the bonding portion 13, in order to reduce the thickness of the display panel 100, these film layers need to be thinned, and the thinning of the film layers will affect its support, buffering and heat dissipation properties.

[0048] Based on this, the present application provides a display panel solution to solve the above problems.

[0049] Please refer to Figure 6 and 7 As shown, a display panel 100 provided in an embodiment of the present application includes a screen body 1, a supporting layer 2 and a supporting body 3, wherein the screen body 1 includes a display portion 11, a bending portion 12 and a bonding portion 13 which are connected in sequence, the display portion 11 and the bonding portion 13 are stacked and spaced apart from each other, and the bending portion 12 is connected between the display portion 11 and the bonding portion 13; the supporting layer 2 is arranged between the display portion 11 and the bonding portion 13, and is attached to the display portion 11; the supporting body 3 is in contact with the inner surface of the bending portion 12 close to the supporting layer 2, and is used to fix the bending shape of the bending portion 12 to the target bending shape.

[0050] In the target bending form, the bending portion 12 includes a first arc portion 121, a plane portion 122 and a second arc portion 123, the first arc portion 121 is connected to the display portion 11, the second arc portion 123 is connected to the bonding portion 13, and the plane portion 122 is connected between the first arc portion 121 and the second arc portion 123.

[0051] The display panel 100 provided by the embodiment of the present application fixes the bent portion 12 to the target bent shape through the support 3, so that the bent portion 12 forms a first arc surface portion 121, a flat surface portion 122, and a second arc surface portion 123. Among them, the existence of the flat surface portion 122 can effectively reduce the bending radius r2 of the bent portion 12, making r2 < r1, and further realizing a narrower border. At the same time, it avoids reducing the thickness of the display panel 100 and affecting the performance of the display panel 100.

[0052] Specifically, for the display panel 100 provided in this embodiment, without changing the width of the slotted area 21, the bending radius of the bent portion 12 can be effectively reduced, and further a narrower border can be realized; and it is not necessary to thin the film layer between the display portion 11 and the bonding portion 13 that provides functions such as support, buffering, and heat dissipation in order to reduce the bending radius, thereby avoiding affecting functions such as support, buffering, and heat dissipation and ensuring the performance of the display panel 100. In fact, without changing the width of the slotted area 21, since part of the bent portion 12 is straightened, the thickness of the display panel 100 provided in this embodiment will increase, which is beneficial to setting a thicker film layer between the display portion 11 and the bonding portion 13 to improve functions such as support, buffering, and heat dissipation. Or, if it is necessary to keep the thickness of the display panel 100 unchanged, the width of the slotted area 21 can be appropriately reduced. In this way, after the bent portion 12 is bent, the thickness of the display panel 100 will be correspondingly reduced, so that the display panel 100 remains at the target thickness.

[0053] Specifically, in the absence of the support 3, both ends of the bent portion 12 are stressed, and other parts are not stressed. It is in a free bending shape, and the bent portion 12 is all arc surface portions, resulting in a larger bending radius r1. In this embodiment, the support 3 is used to change the bending shape of the bent portion 12, fix the bent portion 12 from the original free bending shape to the target bending shape, and in the target bending shape, the bent portion 12 changes from the original all arc surface portions to a combination of arc surface portions and flat surface portions. Among them, the flat surface portion 122 is equivalent to straightening a part of the original bent portion 12, so that the bending radius of the bent portion 12 can be effectively reduced, and further a narrower border can be realized. Specifically, the screen body 1 is a flexible screen body, specifically an organic light emitting diode (OLED) screen body.

[0054] Please refer to Figure 7 As shown, in one of the embodiments, the support 3 includes a first support arc surface 31, a support flat surface 32, and a second support arc surface 33. The first support arc surface 31 contacts the inner surface of the first arc surface portion 121 close to the support layer 2, the support flat surface 32 contacts the inner surface of the flat surface portion 122 close to the support layer 2, and the second support arc surface 33 contacts the inner surface of the second arc surface portion 123 close to the support layer 2.

[0055] The first supporting arc surface 31 contacts the inner surface of the first arc surface portion 121 close to the supporting layer 2, and the inner surface of the first arc surface portion 121 close to the supporting layer 2 is fixed to a first target arc surface, and the curvature of the first target arc surface is the same as the curvature of the first supporting arc surface 31. The supporting plane 32 contacts the inner surface of the plane portion 122 close to the supporting layer 2, and the inner surface of the plane portion 122 close to the supporting layer 2 is fixed to a plane. The second supporting arc surface 33 contacts the inner surface of the second arc surface portion 123 close to the supporting layer 2, and the inner surface of the second arc surface portion 123 close to the supporting layer 2 is fixed to a second target arc surface, and the curvature of the second target arc surface is the same as the curvature of the second supporting arc surface 33.

[0056] In one embodiment, the first supporting arc surface 31 and the inner surface of the first arc surface portion 121 close to the supporting layer 2 are bonded by glue, which can increase the fit between the first supporting arc surface 31 and the inner surface of the first arc surface portion 121 close to the supporting layer 2, so as to better fix the first arc surface portion 121 into the first target arc surface, and avoid the occurrence of a gap between the first supporting arc surface 31 and the inner surface of the first arc surface portion 121 close to the supporting layer 2. Further, before the display panel 100 is bent, glue can be applied to the first supporting arc surface 31, and after bending, the glue bonds the first supporting arc surface 31 and the inner surface of the first arc surface portion 121 close to the supporting layer 2.

[0057] In one embodiment, the support plane 32 and the inner surface of the plane portion 122 close to the support layer 2 are bonded by glue, which can increase the fit between the support plane 32 and the inner surface of the plane portion 122 close to the support layer 2, so as to better fix the plane portion 122 into a plane and prevent the plane portion 122 from bulging. Furthermore, before the display panel 100 is bent, glue can be applied to the plane portion 122, and after bending, the glue bonds the support plane 32 to the inner surface of the plane portion 122 close to the support layer 2.

[0058] In one embodiment, the second supporting arc surface 33 and the inner surface of the second arc surface portion 123 close to the supporting layer 2 are bonded by glue, which can increase the fit between the second supporting arc surface 33 and the inner surface of the second arc surface portion 123 close to the supporting layer 2, so as to better fix the second arc surface portion 123 into the second target arc surface, and avoid the occurrence of a gap between the second supporting arc surface 33 and the inner surface of the second arc surface portion 123 close to the supporting layer 2. Further, before the display panel 100 is bent, glue can be applied to the second supporting arc surface 33, and after bending, the glue bonds the second supporting arc surface 33 and the inner surface of the second arc surface portion 123 close to the supporting layer 2.

[0059] Please refer to Figure 8 and 9As shown, in one embodiment, the display panel 100 further includes a padding block 4, and the padding block 4 is disposed between the support layer 2 and the bonding portion 13. The padding block 4 provides additional support for the bending portion 12, fixes the relative position of the bending portion 12, and prevents the bending portion 12 from being excessively bent. At the same time, the padding block 4 can also play a role in heat dissipation and shock absorption. Furthermore, there are many ways to set the padding block 4. For example, the material of the padding block 4 includes an absorbing material, so that the padding block 4 can play a role in electromagnetic shielding. Optionally, the material of the padding block 4 also includes polyester resin (Polyethylene terephthalate; PET), polyimide (Polyimide; PI), etc.

[0060] Please continue to refer to Fig. 9 As shown, in one embodiment, the padding block 4 extends toward the bent portion 12 and forms the support body 3. The support body 3 can be prepared at the same time as the padding block 4, which is conducive to reducing the difficulty of the process. Preferably, the support body 3 and the padding block 4 are made of the same material and are integrally formed, which is conducive to improving the support strength of the bent portion 12 and improving the anti-extrusion performance of the screen body 1.

[0061] In one embodiment, a transition arc surface 41 is provided between the side of the support body 3 away from the bending portion 12 and the side of the padding block 4 away from the bonding portion 13 . The transition arc surface 41 can effectively improve the structural strength of the connection between the support body 3 and the padding block 4 .

[0062] Specifically, refer to Fig. 9 As shown, the support body 3 and the pad block 4 form a structure similar to an L-shape. Since the support body 3 is used to fix the bending shape of the bending portion 12, the side of the support body 3 close to the bending portion 12 is pressed against the bending portion 12. Therefore, the support body 3 will be subjected to the squeezing force of the bending portion 12, and the part of the support body 3 close to the pad block 4 will be subjected to the supporting force brought by the pad block 4, while the part of the support body 3 away from the pad block 4 lacks support. The setting of the transition arc surface 41 can effectively improve the structural strength of the connection between the support body 3 and the pad block 4, thereby supporting the part of the support body 3 away from the pad block 4, and avoiding fracture between the side of the support body 3 away from the bending portion 12 and the side of the pad block 4 away from the bonding portion 13.

[0063] In one embodiment, the side of the padding block 4 close to the bonding portion 13 is in contact with the bonding portion 13, wherein the padding block 4 is in direct contact with the bonding portion 13, and the support layer between the padding block 4 and the bonding portion 13 is eliminated, which is beneficial to reducing the thickness of the display panel 100. At the same time, since the support body 3 is formed by extending from the padding block 4 to the bending portion 12, the integrated structure of the support body 3 and the padding block 4 can effectively support the bonding portion 13 and the bending portion 12 at the same time, ensuring that the support effect will not be reduced due to the elimination of the support layer between the support body 3 and the padding block 4.

[0064] In one embodiment, the side of the padding block 4 close to the bonding portion 13 is bonded to the bonding portion 13 by glue, which can increase the fit between the padding block 4 and the bonding portion 13 and the stability of the connection.

[0065] Please continue to refer to Figure 8 As shown, in one embodiment, the plane where the side of the planar portion 122 is located is perpendicular to the first plane; wherein the first plane is the plane where the side of the display portion 11 is located, which is beneficial for further reducing the bending radius of the bending portion 12 while keeping the width of the groove area 21 unchanged.

[0066] In one embodiment, the radius of curvature of the first curved portion 121 is the same as the radius of curvature of the second curved portion 123, and the orthographic projection of the first curved portion 121 on the first plane completely overlaps with the orthographic projection of the second curved portion 123 on the first plane, that is, the structures of the first curved portion 121 and the second curved portion 123 are exactly the same, and the first curved portion 121 and the second curved portion 123 are symmetrically arranged, which ensures that the stresses on the first curved portion 121 and the second curved portion 123 are the same, ensures the life of the bending portion 12, and reduces the difficulty of the preparation process.

[0067] Please refer to Fig.10 and 11 As shown, in one embodiment, the display panel 100 further includes a composite film layer 5 , which is located between the bonding portion 13 and the support layer 2 . The composite film layer 5 can provide buffering properties and the like to protect the display panel 100 .

[0068] Please continue to refer to Fig.11As shown, in one embodiment, the composite film layer 5 includes an SCF (Super CleanFoam) component, and the SCF component includes an adhesive layer 51, a buffer layer 52 and a metal layer 53 which are stacked in sequence. Among them, the adhesive layer 51 is used to bond the buffer layer 52 and the support layer 2. The buffer layer 52 is used to enhance the impact resistance of the display panel 100, and the metal layer 53 is used to further increase the strength and toughness of the display panel 100, so that the anti-fall ability of the display panel 100 is increased, and the protective effect of the composite film layer 5 on the display panel 100 is further enhanced. Furthermore, the material of the buffer layer 52 is a material with the characteristics of elasticity, light weight, free bending, and ultra-thin volume, such as a foam material. The material of the metal layer is a metal material with good ductility, such as copper foil.

[0069] Based on the same inventive concept, another embodiment of the present application further discloses a display device, which includes the display panel in the above embodiment. Further, the display device includes a mobile phone, VR equipment, computer, television, car display equipment, etc.

[0070] A display device provided in this embodiment has a display panel 100 in which a bending portion 12 is fixed to a target bending shape by a support body 3, so that the bending portion 12 forms a first arc portion 121, a flat portion 122 and a second arc portion 123, wherein the existence of the flat portion 122 can effectively reduce the bending radius of the bending portion 12, thereby achieving a narrower frame, and at the same time, avoiding reducing the thickness of the display panel 100 and affecting the performance of the display panel 100, which is beneficial to improving the performance of the display device.

[0071] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0072] It should be noted that the above describes some embodiments of the present 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 an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0073] The embodiments of the present 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 the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: A screen body, the screen body comprising a display portion, a bending portion and a bonding portion connected in sequence, the display portion and the bonding portion are stacked and spaced from each other, and the bending portion is connected between the display portion and the bonding portion; A supporting layer, the supporting layer is disposed between the display portion and the bonding portion and is bonded to the display portion; A support body, the support body being in contact with an inner surface of the bending portion close to the support layer; The bending portion includes a first arc portion, a plane portion, and a second arc portion. The first arc portion is connected to the display portion, the second arc portion is connected to the bonding portion, and the plane portion is connected between the first arc portion and the second arc portion.

2. The display panel according to claim 1, characterized in that: The display panel further includes: A padding block is arranged between the supporting layer and the bonding portion.

3. The display panel according to claim 2, characterized in that: The padding block extends toward the bending portion and forms the supporting body; Preferably, the support body and the raising block are made of the same material and are integrally formed; Preferably, a transition arc surface is provided between a side of the support body away from the bending portion and a side of the padding block away from the bonding portion.

4. The display panel according to claim 3, characterized in that: A side of the pad block close to the bonding portion is in contact with the bonding portion; Preferably, a side of the raising block close to the bonding portion is bonded to the bonding portion by glue.

5. The display panel according to claim 1, characterized in that: The plane where the side surface of the planar portion is located is perpendicular to the first plane; wherein the first plane is the plane where the side surface of the display portion is located; Preferably, the radius of curvature of the first arc surface portion is the same as the radius of curvature of the second arc surface portion, and the orthographic projection of the first arc surface portion on the first plane completely overlaps with the orthographic projection of the second arc surface portion on the first plane.

6. The display panel according to claim 1, characterized in that: The support body includes a first supporting arc surface, a supporting plane, and a second supporting arc surface. The first supporting arc surface contacts the inner surface of the first arc surface portion close to the supporting layer, the supporting plane contacts the inner surface of the plane portion close to the supporting layer, and the second supporting arc surface contacts the inner surface of the second arc surface portion close to the supporting layer.

7. The display panel according to claim 6, characterized in that: The first supporting arc surface and the inner surface of the first arc surface portion close to the supporting layer are bonded by glue; Preferably, the supporting plane and the inner surface of the plane portion close to the supporting layer are bonded by glue; Preferably, the second supporting arc surface and the inner surface of the second arc surface portion close to the supporting layer are bonded by glue.

8. The display panel according to claim 1, characterized in that: The display panel further includes: A composite film layer is located between the bonding portion and the supporting layer.

9. The display panel according to claim 8, characterized in that: The composite film layer comprises an SCF component, and the SCF component comprises an adhesive layer, a buffer layer and a metal layer which are stacked in sequence.

10. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-9.

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