Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a substrate and a display function layer located on one side of the substrate. The display panel comprises at least one first edge, and at the first edge, the substrate comprises a first chamfer and a second chamfer; in the first direction, the first chamfer is at least overlapped with the first filling adhesive, the non-chamfer area or the second chamfer is at least overlapped with the second filling adhesive, the viscosity of the second filling adhesive is larger than that of the first filling adhesive, and the first direction is parallel to the plane where the substrate is located and intersects with the first edge. The first chamfer and the second chamfer are formed on the first edge of the substrate of the display panel, then the first chamfer and the second chamfer are filled with the first filling adhesive and the second filling adhesive which are different in viscosity respectively, the first filling adhesive low in viscosity is used for the first time, and the second filling adhesive high in viscosity is used for the second time; therefore, effective filling of the chamfer is realized, and the packaging effect of the edge of the display panel is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to display technology, and more particularly to a display panel and a display device. Background Art

[0002] With the development of display technology, the application of narrow-frame or even borderless display panels is becoming more and more widespread. For narrow-frame or borderless display panels, the narrow width of the border leads to a narrow area of ​​the edge encapsulation structure film layer, which is prone to warping or encapsulation failure, affecting the display effect. Especially in the field of outdoor public information display (PID), due to the large display area, multiple borderless display panels are usually spliced ​​together, and the structure of the spliced ​​edge has also become a focus of attention. Summary of the Invention

[0003] An embodiment of the present invention provides a display panel and a display device. The display panel forms a first chamfer and a second chamfer on a first edge of a base substrate of the display panel, and then fills the first chamfer and the second chamfer with a first filling glue and a second filling glue of different viscosities, respectively. The first filling glue with a lower viscosity is used for the first time, and the second filling glue with a higher viscosity is used for the second time, thereby achieving effective filling of the chamfer and improving the packaging effect of the edge of the display panel.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, comprising a base substrate and a display function layer disposed on one side of the base substrate;

[0005] The display panel includes at least one first edge, and at the first edge, the base substrate includes a first chamfer close to the display function layer and a second chamfer away from the display function layer;

[0006] In which, in the first direction, the first chamfer at least overlaps with the first filling glue, the non-chamfered area or the second chamfer at least overlaps with the second filling glue, the viscosity of the second filling glue is greater than the viscosity of the first filling glue, and the first direction is parallel to the plane where the base substrate is located and intersects with the first edge.

[0007] In a second aspect, an embodiment of the present invention further provides a display device comprising at least the display panel described in the first aspect.

[0008] A display panel provided by an embodiment of the present invention includes a base substrate and a display function layer disposed on one side of the base substrate, wherein the display function layer includes a plurality of light-emitting elements arranged in an array to display a display image. The display panel includes at least one first edge, wherein the first edge may be a splicing edge of the display panel. At the first edge, the base substrate is provided with a first chamfer on a side close to the display function layer and a second chamfer on a side away from the display function layer. To avoid poor packaging of the first edge, during packaging, a first filler with a lower viscosity is first filled in the first chamfer area to prevent the filler from forming a bubble cavity. Then, a second filler with a higher viscosity is filled in the second chamfer area. The second filler can also cover the non-chamfered area to achieve effective filling of the chamfer, thereby improving the packaging effect of the display panel edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram of a partial structure of a display panel provided by an embodiment of the present invention;

[0010] Figure 2 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0011] Figure 3 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0012] Figure 4 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0013] Figure 5 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0014] Figure 6 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0015] Figure 7 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0016] Figure 8 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0017] Figure 9 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0018] Figure 10 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0019] Figure 11 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0020] Figure 12 A schematic diagram of a top view of a structure in which multiple display panels are spliced ​​together according to an embodiment of the present invention;

[0021] Figure 13 For a Figure 12 Schematic diagram of the cross-sectional structure along the midline A1A2;

[0022] Figure 14 For another Figure 12 Schematic diagram of the cross-sectional structure along the midline A1A2;

[0023] Figure 15 For a Figure 12 Schematic diagram of the cross-sectional structure along the middle section line B1B2;

[0024] Figure 16 For another Figure 12 Schematic diagram of the cross-sectional structure along the middle section line B1B2;

[0025] Figure 17 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0027] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present invention are described based on the angles shown in the accompanying drawings and should not be understood as limitations on the embodiments of the present invention. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is formed "on" or "under" another element, it can not only be formed directly "on" or "under" another element, but can also be formed indirectly "on" or "under" another element through an intermediate element. The terms "first", "second", etc. are only used for descriptive purposes and do not indicate any order, quantity or importance, but are only used to distinguish different components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] In order to solve the packaging problem of the edges of narrow-border or borderless display panels, an embodiment of the present invention provides a display panel, including a base substrate and a display function layer arranged on one side of the base substrate; the display panel includes at least one first edge, and at the first edge, the base substrate includes a first chamfer on a side close to the display function layer and a second chamfer on a side away from the display function layer; wherein, in a first direction, the first chamfer overlaps with at least the first filling glue, and the non-chamfered area or the second chamfer overlaps with at least the second filling glue, the viscosity of the second filling glue is greater than the viscosity of the first filling glue, and the first direction is parallel to the plane where the base substrate is located and intersects with the first edge.

[0029] Indicative, Figure 1 A schematic diagram of a partial structure of a display panel provided by an embodiment of the present invention is provided. Figure 2 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention, Figure 3 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention is shown. Figures 1 to 3 The structure of the display panel's partial display area and first edge is shown. The display panel includes a base substrate 10 and a display function layer 20 disposed on one side of the base substrate 10. The base substrate 10 may be a glass substrate that serves as a support. The display function layer 20 is disposed above the base substrate 10. The display function layer 20 may include a pixel circuit layer 21 ( Figures 1 to 3 The specific structure of the pixel circuit layer 21 is not shown in the figure) and the light-emitting element 22, the display panel may further include a light-shielding layer 23 / 90. The pixel circuit layer 21 is provided with a pixel circuit array, and the pixel circuit drives the light-emitting element 22 to emit light. The pixel circuit in the pixel circuit layer 21 is used to drive the light-emitting element 22 to emit light, so the embodiment of the present invention refers to the pixel circuit layer 21 and the light-emitting element 22 as a display function layer. In other embodiments, only the light-emitting element 22 and related film layers (such as a light-shielding layer, an insulating layer around the light-emitting element electrode) may be used as a display function layer. The light-emitting element 22 may be an organic light-emitting diode (OLED), a sub-millimeter light-emitting diode (MiniLED) or a micro light-emitting diode (Micro LED). The specific implementation can be designed according to actual conditions, and the embodiment of the present invention is not limited thereto. Figures 1 to 3 Only one light-emitting element 22 located at the edge of the display area is schematically shown. In the display area of ​​the display panel, a plurality of light-emitting elements arranged in an array are provided, wherein the light-emitting elements may include red light-emitting elements, green light-emitting elements, and blue light-emitting elements to achieve color display. The display panel includes at least one first edge 30. At the first edge, the base substrate 10 includes a first chamfer 11 on the side close to the display function layer 20 and a second chamfer 12 on the side away from the display function layer 20. Figure 1In the first direction x, the first chamfer 11 overlaps with the first filling glue 40, and the non-chamfered area 13 (the area between the first chamfer 11 and the second chamfer 12 on the side wall of the substrate 10) and the second chamfer 12 both overlap with the second filling glue 50; Figure 2 In the first direction x, the first chamfer 11 overlaps with the first filling glue 40, and the first chamfer 11, the non-chamfered area 13 and the second chamfer 12 all overlap with the second filling glue 50; Figure 3 In the first direction x, the first chamfer 11 and the non-chamfered area 13 both overlap with the first filler 40, and the second chamfer 12 overlaps with the second filler 50; wherein the first direction x is parallel to the plane of the base substrate 10 and intersects with the first edge 30, that is, the first direction x is the direction from the first edge 30 of the display panel to the display area. By setting the first chamfer 11 and the second chamfer 12, the contact area between the filler and the edge of the display panel can be increased, thereby improving the yield rate of the package. In addition, the viscosity of the second filler 50 is set to be greater than the viscosity of the first filler 40, and the elasticity of the second filler 50 is greater than the elasticity of the first filler 40. When encapsulating the side of the display panel, the first filler 40 with a lower viscosity is filled for the first time. Since the first filler 40 has a lower viscosity, it has better fluidity and is less likely to cause bubbles and other undesirable phenomena when filling the edge area of ​​the display function layer. Then, the second filler 50 with a higher viscosity is filled for the second time to fill the edge of the base substrate 10, thereby achieving a better encapsulation effect.

[0030] Continue to refer Figure 1 or Figure 2 At the first edge position, the edge of the side of the display function layer 20 away from the display area (that is, the end face connected between the top surface and the bottom surface of the display function layer. The display function layer and the end face of the display function layer and the specific composition of the end face will be described in detail below. The following is directly described as the edge of the display function layer 20) presents a machined planar shape, that is, the plane formed by the edge of the display function layer 20 is coplanar with the first chamfered surface, so that the projection of the first filling glue 40 in the first chamfered area on the first plane is triangular (or trapezoidal) as a whole, the first plane is perpendicular to the plane where the display panel is located, and the first plane is perpendicular to the first edge.

[0031] It is understandable that Figures 1 to 3 What is shown is a cross-sectional view of the local structure of the display panel with the first plane as the cross-section. In this embodiment, the edge of the display function layer 20 is processed into a plane, which can avoid the formation of steps between different film layers and avoid insufficient filling due to the step difference. By setting the shape of the first filling glue 40 to a triangular shape, it is beneficial to increase the thickness of the first filling glue 40 and the contact area with the edge, thereby improving the packaging effect.

[0032] According to the technical solution of the embodiment of the present invention, the first chamfered area is closer to the display function layer than the second chamfered area. Since the display function layer includes multiple stacked film layers, there may be step differences between the multiple film layer structures, and their boundaries are relatively complex. If the sealing is poor, it may affect the display effect. Therefore, during packaging, the first chamfered area is first filled with a first filling glue with lower viscosity. The first filling glue has lower viscosity and better fluidity, thereby avoiding the formation of bubble cavities by the filling glue. The second chamfered area is located on the back of the display panel, and the second chamfered area is filled with a second filling glue with higher viscosity. The second filling glue can also cover the non-chamfered area to achieve effective filling of the chamfer, thereby improving the packaging effect of the edge of the display panel.

[0033] The inventors have found that in order to achieve a borderless display of a display panel, side traces are usually set to extend along the side of the display panel to the back of the display panel. Since the packaging of the side traces requires the packaging of the side walls of the display panel, the packaging glue may be insufficient to fill the gap, which is more likely to cause edge packaging failure.

[0034] In an embodiment of the present invention, chamfers are provided and then filled with a first filling glue and a second filling glue, thereby avoiding edge packaging failure. In addition, the borderless display panel can also be used for splicing display. An embodiment of splicing display is described in detail below.

[0035] Continue to refer Figure 1 Optionally, the first chamfer is filled with a first filling glue 40, and the second chamfer is filled with a second filling glue 50.

[0036] It can be understood that, since the base substrate 10 is provided with the first chamfer 11 and the second chamfer 12, a filling space corresponding to the filling glue is formed. Figure 1 The area formed by the dotted frame 111 is the space formed by the first chamfer, that is, the first chamfer is filled with the first filling glue 40 , and the area formed by the dotted frame 121 is the space formed by the second chamfer, that is, the second chamfer is filled with the second filling glue 50 .

[0037] Continue to refer Figures 1 to 3 Optionally, the display panel also includes a surface film material 60 located on the side of the display function layer 20 away from the base substrate, wherein the surface film material 60 can be attached to the surface of the display function layer 20 through a transparent optical adhesive layer (OC) 70 / 90, and at least part of the end surface of the second filling glue 50 away from the display area is flush with the end surface of the surface film material 60 at the first edge 30.

[0038] Among them, the surface film material 60 can be a 3A film material including anti-glare (AG), anti-fingerprint (AF) and anti-reflection (AR) functions, or a 2A film material including two functions, or a composite film material with more functions. The surface film material 60 can play a role in protecting the display function layer 20, and can also have functions such as AG, AF and AR. The function of the surface film material 60 can be designed according to actual conditions during implementation, and the embodiment of the present invention is not limited to this. It can be understood that due to the different amounts of glue and packaging methods used during sealing, the first filling glue 40 and the second filling glue 50 can have different settings. Optionally, in the area corresponding to the first chamfer 11 or the first chamfer 11 and the non-chamfered area 13, the second filling glue 50 exposes the end face of the first filling glue 40 away from the display area, and the end face of the first filling glue 40 away from the display area, the end face of the second filling glue 50 away from the display area and the end face of the surface film material 60 at the first edge 30 are flush. The non-chamfered area 13 in the embodiment of the present invention refers to an area on the base substrate 10 between the first chamfer 11 and the second chamfer 12 .

[0039] Optionally, the first filling glue 40 covers the first chamfered area, and the second filling glue 50 covers the second chamfered area; one or both of the first filling glue 40 or the second filling glue 50 covers the non-chamfered area; the first filling glue 40 and the second filling glue 50 are connected, and the two are flush with the edges toward the outside of the base substrate 10.

[0040] For example, in Figure 1 In the embodiment, the interface between the first filling glue 40 and the second filling glue 50 is located below the first chamfer, that is, the surface film material 60, the first filling glue 40 and the second filling glue 50 are flush with the end surface of the first edge 30; in other words, Figure 1 In the embodiment, the edge of the first filling glue 40 is flush with the first edge 30 of the display panel, and the first filling glue 40 and the second filling glue 50 are arranged along the direction of the surface film material 60 pointing to the base substrate 10. Along the first direction x, the second filling glue 50 covers the non-chamfered area 13 on the side of the base substrate. Figure 2 In the embodiment, optionally, in the first direction x, the first chamfer 11 overlaps with the second filling glue 50, and the end surface of the second filling glue 50 away from the display area is flush with the end surface of the surface film material 60 at the first edge 30. That is, the interface between the first filling glue 40 and the second filling glue 50 is located on the right side of the first chamfer area (corresponding to Figure 2In the various embodiments of the present invention, the up, down, left, and right directions described are all the directions in the corresponding drawings), that is, the second filling glue 50 covers the first filling glue 40, that is, the surface film material 60 and the second filling glue 50 are flush with the end surface of the first edge 30; the second filling glue 50 and the surface film material 60 are in contact with the surface of the side close to the base substrate 10, so that the first filling glue 40 can be completely encapsulated in the first chamfer area, which is beneficial to improve the encapsulation effect. Figure 3 In the embodiment, the interface between the first filling glue 40 and the second filling glue 50 is located below the non-chamfered area 13, that is, the surface film material 60, the first filling glue 40 and the second filling glue 50 are flush with the end surface of the first edge 30, the edge of the first filling glue 40 is flush with the first edge 30 of the display panel, and the first filling glue 40 and the second filling glue 50 are arranged along the direction of the surface film material 60 pointing to the base substrate 10. Along the first direction x, the first filling glue 40 covers the non-chamfered area 13 on the side of the base substrate 10. In other embodiments, the first filling glue 40 can also be designed to cover the upper half of the non-chamfered area, and the second filling glue 50 can cover the lower half of the non-chamfered area. The specific implementation can be designed according to actual conditions, and the embodiments of the present invention are not limited to this.

[0041] Figure 4 A partial structural diagram of another display panel provided in an embodiment of the present invention, referring to Figure 4 Optionally, in the non-chamfered area 13 between the first chamfer 11 and the second chamfer 12, the first filling glue 40 and the second filling glue 50 overlap in the first direction x; in the overlapping area, the first filling glue 40 is located on the side of the second filling glue 50 close to the base substrate 10.

[0042] It can be understood that, since the filling glue has fluidity, when the first filling glue 40 is filled in the first chamfer 11, due to the overflow effect of the first filling glue 40, part of the first filling glue 40 will be left in the non-chamfered area 13, that is, the first filling glue 40 forms a slope shape in the non-chamfered area 13, and the second filling glue 50 will form a slope shape complementary to the first filling glue 40, forming Figure 4 The structure shown.

[0043] Figure 5 A partial structural diagram of another display panel provided in an embodiment of the present invention, referring to Figure 5 Optionally, the first filling glue 40 extends to the second chamfer 12, and the surface of the first filling glue 40 close to the second chamfer 12 is connected with and coplanar with the second chamfer surface.

[0044] It is understandable that something like Figure 4In the embodiment, the first filling glue 40 extends to the non-chamfered area 13, but the first filling glue 40 does not cover the second chamfer. Therefore, in this embodiment, the first filling glue 40 is set to extend to the edge of the second chamfer 12, and the surface of the first filling glue 40 close to the second chamfer 12 is coplanar with the second chamfer surface, which is the extreme position of the extension of the first filling glue 40.

[0045] Figure 6 A partial structural diagram of another display panel provided in an embodiment of the present invention, referring to Figure 6 Optionally, the first edge 30 is further provided with a side encapsulation layer 31. Along a direction perpendicular to the first edge 30 and parallel to the plane of the display panel, that is, along the first direction x, the side encapsulation layer 31 covers the side edges of the display function layer 20 and the side edges of the base substrate 10 at the first edge 30. It should be noted that the first edge described here refers to a macroscopic view, where the edge of the display panel is regarded as a line, or when the display panel is viewed from above, the extension direction of the outer contour line of the display panel is the first edge.

[0046] Among them, the side encapsulation layer 31 can effectively encapsulate the edge of the display function layer 20, reducing the failure of the display function layer 20 due to water and oxygen intrusion and other reasons. In addition, the side encapsulation layer 31 can be set to a material with higher viscosity to increase the firmness between the first filling glue 40 and the second filling glue 50 and the first edge 30.

[0047] Figure 7 A partial structural diagram of another display panel provided in an embodiment of the present invention, referring to Figure 7 Optionally, the first edge 30 is further provided with a side trace 32 , the first end of the side trace 32 is located in the display function layer 20 , and the side trace 32 extends along the edge of the base substrate 10 to the surface of the base substrate 10 away from the display function layer 20 .

[0048] Among them, for borderless display panels, in order to achieve a borderless display effect, structures such as the driver chip can be set on the back of the display panel, and then the side wiring is used to connect the driver chip and the circuit in the display area. This setting can reduce the border of the display panel, and the light-emitting elements at the edge of the display area can be set as close to the edge as possible, thereby achieving a visual borderless effect.

[0049] Continue to refer Figure 7 Optionally, it also includes a side encapsulation layer 31, which covers the side traces 32 located at the edge of the base substrate 10 and at least part of the side traces 32 located on the surface of the base substrate 10 away from the display function layer 20.

[0050] The side encapsulation layer 31 can protect the side traces 32 and prevent the side traces 32 from breaking or other defects. In specific implementations, the side encapsulation layer 31 can be a transparent encapsulation layer or a black encapsulation layer, and can be designed according to actual conditions.

[0051] In one embodiment, optionally, the display panel further includes a protective layer, and a projection of the protective layer on the first edge of the display panel covers the first chamfered surface, the second chamfered surface, and a non-chamfered area between the first chamfer and the second chamfer.

[0052] For example, Figure 8 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention is shown. Figure 9 A partial structural diagram of another display panel provided in an embodiment of the present invention, referring to Figure 8 and Figure 9 Optionally, the protective layer includes a first protective layer 81. In the area where the first chamfer is located, the first protective layer 81 is located on the side of the first filling glue 40 close to the base substrate 10. In the non-chamfer area 13, the first protective layer 81 is located on the side of the first filling glue 40 or the second filling glue 50 close to the base substrate 10. In the area where the second chamfer is located, the first protective layer 81 is located on the side of the second filling glue 50 close to the base substrate 10.

[0053] The first protective layer 81 can be used to increase the bonding strength between the first filling glue 40 or the second filling glue 50 and the display panel. Figure 9 In the embodiment shown including the side traces 32 , the first protection layer 81 can be used to protect the side traces 32 , and its structure and effect are similar to those of the side encapsulation layer in the aforementioned embodiment.

[0054] Optionally, the display panel further includes at least one functional layer 90 located on a side of the base substrate 10 close to the display functional layer 20 and close to the first edge 30 (the functional layer at least includes a filling layer 908, a light shielding layer 23 and a transparent optical adhesive layer 70, and the filling layer 908, the light shielding layer 23 and the transparent optical adhesive layer 70 are stacked in sequence along the direction from the base substrate 10 to the display functional layer 20), and the first protective layer 81 also covers the end surface of the functional layer 90 away from the display area ( Figure 8 ), or one end of the first protective layer 81 extends to the inside of the display function layer 20 ( Figure 9 ).

[0055] It is understandable that since the display function layer of the display area includes a semiconductor active layer, multiple metal layers, multiple insulating layers, and a planarization layer, part of the film layer ends inside the display area rather than at the edge of the display function layer. Especially for the borderless splicing display panel, due to its borderless feature, in order to reduce the visibility of the seams after splicing, it is generally necessary to reduce the thickness of the encapsulation layer to the extreme. At this time, in order to prevent the organic layer such as the planarization layer from peeling off, it is necessary to dig grooves near the boundary. This causes the edge of the display function layer to have different heights due to the difference in the film layer, forming a step difference. In order to compensate for the step difference, a functional layer 90 can be formed on the base substrate 10. Figure 8 and Figure 9 Only one functional layer 908 / 90 is schematically shown. In a specific implementation, the insulating layer below ( Figure 8 and Figure 9 Not shown, see Figures 13 to 16 In the embodiment, the light-shielding layer 23 / 90 above, the transparent optical adhesive layer 70 / 90 and other film layers can all be regarded as functional layers.

[0056] Continue to refer Figure 8 Optionally, the first protective layer thickness d1 in the first chamfered area is greater than the first protective layer thickness d2 in the non-chamfered area, and the first protective layer thickness d3 in the second chamfered area is greater than the first protective layer thickness d2 in the non-chamfered area.

[0057] Among them, since the first chamfered surface and the second chamfered surface are inclined, the area where the first chamfer is located and the area where the second chamfer is located are larger than the non-chamfered area, so the first protective layer thickness of the first chamfered area and the second chamfered area can be set to be larger to improve the protection effect.

[0058] In another embodiment, the second chamfer may be directly filled with a protective layer. Schematically, Figure 10 A partial structural diagram of another display panel provided in an embodiment of the present invention, referring to Figure 10 , using the first protective layer 81 to directly fill the second chamfer, and then setting the second filling glue 50 on the outside, can also achieve a good packaging effect.

[0059] Figure 11 A partial structural diagram of another display panel provided in an embodiment of the present invention, referring to Figure 11 Optionally, the protective layer includes a second protective layer 82. In the area where the first chamfer is located, the second protective layer 82 is located on the side of the first filling glue 40 away from the base substrate 10. In the non-chamfered area 13, the second protective layer 82 is located on the side of the first filling glue 40 or the second filling glue 50 away from the base substrate 10. In the area where the second chamfer is located, the second protective layer 82 is located on the side of the second filling glue 50 close to the base substrate 10.

[0060] It is understandable that Figure 11 The protective layer shown includes the first protective layer 81 and the second protective layer 82 for illustration only. In other implementations, the protective layer may be provided with only the first protective layer 81 or only the second protective layer 82. The specific implementation may be designed according to actual conditions. Optionally, the protective layer is a blackened layer.

[0061] It can be understood that the first protective layer 81 and / or the second protective layer 82 can be set as a blackened layer. In specific implementation, only the first protective layer 81 can be set as a blackened layer to prevent the side wiring from affecting the display effect due to reflection and other reasons. Alternatively, only the second protective layer 82 can be set as a blackened layer to block the first filling glue 40 and the second filling glue 50, or both the first protective layer 81 and the second protective layer 82 can be set as blackened layers. Alternatively, the first protective layer 81 can be set as a transparent encapsulation layer and the second protective layer 82 can be set as a blackened layer. The specific implementation can be designed according to actual conditions, and the embodiments of the present invention are not limited to this.

[0062] Continue to refer Figure 11 Optionally, the second protective layer 82 includes a first region 82a, a second region 82b and a third region 82c connected in sequence; along the direction y pointing from the display functional layer 20 to the base substrate 10, the first region 82a covers the first chamfer 11, along the first direction x, the second region 82b covers the first edge 30, along the direction -y pointing from the base substrate 10 to the display functional layer 20, the third region 82c has a second chamfer 12.

[0063] The first chamfer 11 and the second chamfer 12 are non-display structures. In practice, the second protective layer 82 can be blackened to prevent the edges from affecting the display effect. It should be noted that the actual first chamfer 11 and the second chamfer 12 occupy a very small proportion. The figures in this invention are only for illustrative purposes and do not represent the actual size and proportion of the chamfers.

[0064] Optionally, the first region 82a, the second protective layer of the second region of the first part, and the region 110 surrounded by the first chamfered surface are filled with the first filling glue 40, the third region 82c, the second protective layer of the second region of the second part, and the region 120 surrounded by the second chamfered surface are filled with the second filling glue 50, and at least one of the first filling glue 40 or the second filling glue 50 is filled between the second protective layer of the second region of the third part and the non-chamfered region 13 ( Figure 11 The second filling glue 50 is schematically shown in the figure, and in other embodiments it can be the first filling glue 40, or include both the first filling glue 40 and the second filling glue 50); wherein, the second area of ​​the first part, the second area of ​​the third part and the second area of ​​the second part are arranged in sequence along the direction y from the display function layer 20 to the base substrate 10, so as to realize the second protective layer 82 surrounding the chamfered area and the first edge 30.

[0065] The display panel provided by the embodiment of the present invention can be used in the PID field by splicing multiple display panels. Optionally, the first edge is a splicing edge, at least two display panels are spliced, and the splicing edge of a display panel is adjacent to the splicing edge of another display panel.

[0066] For example, Figure 12 A schematic diagram of a top view of a plurality of display panels spliced ​​together according to an embodiment of the present invention is provided. Figure 13 For a Figure 12 Schematic diagram of the cross-section structure along the center line A1A2. Figure 14 For another Figure 12 Schematic diagram of the cross-section structure along the center line A1A2. Figure 15 For a Figure 12 Schematic diagram of the cross-section structure along the middle section line B1B2. Figure 16 For another Figure 12 The cross-sectional structure diagram of the middle section line B1B2 is as follows: Figure 13 and Figure 14 The left picture in the middle shows the cross-section of the right frame of the display panel, and the right picture shows the cross-section of the left frame of the adjacent display panel. Usually, the side wiring is not designed on the left and right frames, so Figure 13 and Figure 14 There is no side routing. Figure 15 and Figure 16 The left figure shows a cross-sectional view of the lower frame of the display panel, and the right figure shows a cross-sectional view of the upper frame of the adjacent display panel. Therefore, the left figure is provided with a side line 32. In another embodiment, the side lines can be provided on both the upper and lower frames of the display panel. Figure 15 or Figure 16 Both the left and right pictures in the middle include side routing.

[0067] Optional, reference Figure 13 or Figure 15 The display panel further includes a plurality of functional layers 90 located between the surface film material 60 and the base substrate 10, wherein the end surface of the functional layer 90 close to the first edge is connected to the first chamfered surface and is coplanar, or referring to Figure 14 or Figure 16 At least a portion of the functional layer 90 extends toward the surface film material 60 along the extension direction of the first chamfered surface.

[0068] Optionally, the display panel further includes at least one functional layer 90 located between the surface film material 60 and the base substrate 10. The functional layer 90 includes multiple sub-layers stacked sequentially along the direction from the base substrate 10 toward the display functional layer 20, i.e., the -y direction. Based on this direction, the end faces of the sub-layers are sequentially constricted toward the display area along the direction from the first edge toward the display area, so that the functional layer as a whole forms a step or inclined surface. Optionally, the sub-layers include a combination of one or more of multiple insulating layers, light-shielding layers, and transparent optical adhesive layers.

[0069] Exemplary, reference Figures 13 to 16 The display area of ​​the display panel includes a first metal layer 201, a first insulating layer 901, a semiconductor active layer 202, a second insulating layer 902, a second metal layer 203, a third insulating layer 903, a third metal layer 204, a fourth insulating layer 904, a first planarization layer 905, a fourth metal layer 205, a second planarization layer 906, a fifth metal layer 206, a fifth insulating layer 907, a light-emitting element 22, a black matrix (light-shielding layer) 23 / 90, a transparent optical adhesive layer 70 / 90 and a surface film material 60, which are stacked in sequence on one side of the base substrate 10. The first metal layer 201, the first insulating layer 901, the semiconductor active layer 202, the second insulating layer 902, the second metal layer 203, the third insulating layer 903, the third metal layer 204, the fourth insulating layer 904, the first planarization layer 905, the fourth metal layer 205, the second planarization layer 906 and the fifth metal layer 206 can be considered to belong to the pixel circuit layer 21. Figure 13 and Figure 15 In the embodiment of the present invention, the edges of the first insulating layer 901, the second insulating layer 902, the third insulating layer 903, the fourth insulating layer 904, the first planarizing layer 905, the second planarizing layer 906, the fifth insulating layer 907, the filling layer 908, the black matrix (light shielding layer) 23 / 90 and the transparent optical adhesive layer 70 / 90 close to the first chamfer 11 are all plane and coplanar with the first chamfer surface. This arrangement is conducive to the flow of the first filling glue 40 and avoids the generation of bubbles and other defects in the first filling glue 40 during filling. Figure 14 and Figure 16In the embodiment, the edges of the first insulating layer 901, the second insulating layer 902, the third insulating layer 903, the fourth insulating layer 904, the first planarizing layer 905, the second planarizing layer 906 and the fifth insulating layer 907 close to the first chamfer 11 are all planes and coplanar with the first chamfer surface, and the edges of the filling layer 908, the black matrix (light-shielding layer) 23 / 90 and the transparent optical adhesive layer 70 / 90 close to the first chamfer 11 are all curved surfaces. Since the filling layer 908, the black matrix (light-shielding layer) 23 / 90 and the transparent optical adhesive layer 70 / 90 are usually organic materials, curved surfaces will be formed at the edges due to overflow and other reasons during preparation. This can release the internal stress of the film layer, and the curved surface can increase the surface area of ​​the edge, thereby increasing the bonding performance with the first filling glue 40 and compensating for the insufficient viscosity of the first filling glue 40. The first metal layer 201 is located below the semiconductor active layer 202 and serves as a light shield to prevent external light from affecting the performance of the semiconductor active layer 202. The semiconductor active layer 202 can be a polysilicon active layer or an oxide semiconductor active layer according to actual needs. In some embodiments, two types of semiconductor active layers can be provided. The second metal layer 203 can form the gate of the transistor, and the third metal layer 204 can form the source and drain of the transistor. Figures 13 to 16 Only one transistor 200 is schematically shown. Furthermore, the second metal layer 203, the third metal layer 204, the fourth metal layer 205, and the fifth metal layer 206 can be designed as internal wiring of the display panel according to actual needs, and their specific design can be selected based on actual conditions. For example, in an embodiment including side wiring, in order to reduce the resistance of the side wiring, the side wiring is connected to the second metal layer 203, the third metal layer 204, the fourth metal layer 205, and the fifth metal layer 206.

[0070] Because the first and second planarizing layers 905 and 906 cut off at the edge of the display area and are made of relatively thick organic materials, a stepped structure is formed. In contrast, the first, second, third, and fourth insulating layers 901, 902, 903, and 904 are typically made of relatively thin inorganic materials, resulting in a directly formed inclined surface coplanar with the first chamfered surface. Therefore, in the non-display area, a filling layer 908, light-shielding layers 23 / 90, transparent optical adhesive layers 70 / 90, and surface film material 60 are disposed above the stepped surface. The filling layer 908 is used to fill the step difference formed by the planarizing layer.

[0071] It should be noted that Figures 13 to 16 This is only for schematically illustrating the structure of the display panel, and the specific film layer design can be adjusted according to actual conditions.

[0072] Continue to refer Figure 13Optionally, the display function layer 20 includes a pixel circuit layer 21 and a light emitting element 22, and the pixel circuit layer 21 includes at least one planarization layer ( Figure 13 Two planarization layers 905 and 906 are shown as examples, which is not a limitation of the embodiments of the present invention); the display panel includes a display area AA and a non-display area NA, the planarization layer is located in the display area AA, and the edge of the planarization layer is located between the display area AA and the edge of the base substrate 10; and further includes a filling layer 908, the filling layer 908 is located in the non-display area NA, and the filling layer 908 at least fills the edge of the planarization layer.

[0073] Optionally, the display panel further includes a light shielding layer 23 / 90 located on a side of the filling layer 908 away from the base substrate 10 and a transparent optical adhesive layer 70 / 90 located on a side of the light shielding layer 23 / 90 away from the base substrate 10 .

[0074] The light shielding layer 23 / 90 forms a black matrix for shielding the pixel circuits. The light shielding layer 23 / 90 is provided with a plurality of holes for arranging light emitting elements. The transparent optical adhesive layer 70 / 90 is used to attach the surface film material 60 to the surface of the display panel.

[0075] Optionally, the filling layer 908 , the light shielding layer 23 / 90 and the transparent optical adhesive layer 70 / 90 are all formed by an inkjet printing process.

[0076] The filling layer 908 , the light shielding layer 23 / 90 and the transparent optical adhesive layer 70 / 90 can all be made of organic materials, and the inkjet printing process has high precision, which is conducive to reducing costs.

[0077] Continue to refer Figure 13 Optionally, the first edge has no edge routing, the end surface of the filling layer 908 away from the display area is planar, and the end surface of the filling layer 908 is connected to the first chamfered surface and is coplanar.

[0078] Continue to refer Figure 16 Optionally, the first edge is further provided with an edge line, and at least one of the filling layer 908, the light shielding layer 23 / 90, and the transparent optical adhesive layer 70 / 90 has a curved surface facing away from the display area. Optionally, the first filling adhesive 40 covers the edge of the filling layer 908, the light shielding layer 23 / 90, and the transparent optical adhesive layer 70 / 90 facing away from the display area.

[0079] Among them, the end face shapes of the filling layer 908, the shading layer 23 / 90 and the transparent optical adhesive layer 70 / 90 are convex, which is only for reference. In other embodiments, the curved surface shape can be set according to actual needs, such as a concave surface, or the surface of multiple film layers can form a wavy shape. The specific implementation can be designed according to actual conditions.

[0080] It should be noted that in other embodiments, for example, if there is an edge with side routing, the end faces of the filling layer 908, the shading layer 23 / 90 and the transparent optical adhesive layer 70 / 90 can also be set to be connected with the first chamfered surface and be coplanar. If there is no edge with side routing, the end faces of the filling layer 908, the shading layer 23 / 90 and the transparent optical adhesive layer 70 / 90 can also be set as curved surfaces.

[0081] An embodiment of the present invention further provides a display device, comprising any one of the display panels provided in the above embodiments.

[0082] Optionally, the display device includes at least two spliced ​​display panels, a first edge of the display panel is a spliced ​​edge, and the spliced ​​edge of the display panel is adjacent to the spliced ​​edge of another display panel. Figure 17 A schematic diagram of a display device according to an embodiment of the present invention is provided. Figure 17 The display device 2 includes a plurality of spliced ​​display panels 1 , and each display panel 1 is adjacent to a spliced ​​edge of another display panel 1 .

[0083] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, combinations, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: It includes a base substrate and a display function layer arranged on one side of the base substrate; The display panel includes at least one first edge, and at the first edge, the base substrate includes a first chamfer close to the display function layer and a second chamfer away from the display function layer; In which, in the first direction, the first chamfer at least overlaps with the first filling glue, the non-chamfered area or the second chamfer at least overlaps with the second filling glue, the viscosity of the second filling glue is greater than the viscosity of the first filling glue, and the first direction is parallel to the plane where the base substrate is located and intersects with the first edge.

2. The display panel according to claim 1, wherein: The first chamfer is filled with the first filling glue, and the second chamfer is filled with the second filling glue.

3. The display panel according to claim 1, wherein: The first edge is a splicing edge, and at least two display panels are spliced ​​together, and a splicing edge of one display panel is adjacent to a splicing edge of another display panel.

4. The display panel according to claim 1, wherein: It also includes a surface film material located on the side of the display function layer away from the base substrate, and at least part of the end surface of the second filling glue away from the display area is flush with the end surface of the surface film material at the first edge.

5. The display panel according to claim 4, wherein: In the first direction, the first chamfer overlaps with the second filling glue, and the end surface of the second filling glue away from the display area is flush with the end surface of the surface film material at the first edge.

6. The display panel according to claim 1, wherein: It also includes a surface film material located on a side of the display function layer away from the base substrate; In the area corresponding to the first chamfer or the first chamfer and non-chamfer area, the second filling glue exposes the end surface of the first filling glue away from the display area, and the end surface of the first filling glue away from the display area, the end surface of the second filling glue away from the display area, and the end surface of the surface film material at the first edge are flush.

7. The display panel according to claim 4, wherein: It also includes at least one functional layer located between the surface film material and the base substrate, the end face of the functional layer close to the first edge is connected to and coplanar with the first chamfered surface, or at least part of the functional layer extends toward the surface film material along the extension direction of the first chamfered surface.

8. The display panel according to claim 4, wherein: It also includes at least one functional layer located between the surface film material and the base substrate, and the functional layer includes a plurality of sub-layers stacked in sequence along the direction of the base substrate pointing to the display functional layer, and the end faces of the sub-layers are sequentially narrowed toward the display area along the direction of the first edge pointing to the display area, so that the functional layer as a whole forms a step or a slope.

9. The display panel according to claim 8, wherein: The sub-layer includes one or more combinations of a plurality of insulating layers, a light shielding layer, and a transparent optical adhesive layer.

10. The display panel according to claim 1, wherein The first edge is further provided with a side encapsulation layer, and along a direction perpendicular to the first edge and parallel to the plane where the display panel is located, the side encapsulation layer covers the side of the display function layer and the side of the base substrate at the first edge.

11. The display panel according to claim 1, wherein The first edge is further provided with a side trace, a first end of the side trace is located in the display function layer, and the side trace extends along the edge of the base substrate to the surface of the base substrate away from the display function layer.

12. The display panel according to claim 11, wherein: It also includes a side encapsulation layer, which covers the side routing located at the edge of the base substrate and at least a portion of the side routing located on the surface of the base substrate away from the display function layer.

13. The display panel according to claim 1, wherein A protective layer is also included, wherein the projection of the protective layer on the first edge of the display panel covers the first chamfered surface, the second chamfered surface, and a non-chamfered area between the first chamfer and the second chamfer.

14. The display panel according to claim 13, wherein: The protective layer includes a first protective layer. In the area where the first chamfer is located, the first protective layer is located on the side of the first filling glue close to the base substrate. In the non-chamfer area, the first protective layer is located on the side of the first filling glue or the second filling glue close to the base substrate. In the area where the second chamfer is located, the first protective layer is located on the side of the second filling glue close to the base substrate.

15. The display panel according to claim 14, wherein: It also includes at least one functional layer located on the side of the base substrate close to the display functional layer and close to the first edge. The first protective layer also covers the end faces of multiple functional layers away from the display area, or one end of the first protective layer extends into the interior of the display functional layer.

16. The display panel according to claim 14, wherein: The thickness of the first protective layer in the first chamfered area is greater than that in the non-chamfered area, and the thickness of the first protective layer in the second chamfered area is greater than that in the non-chamfered area.

17. The display panel according to claim 13, wherein: The protective layer includes a second protective layer. In the area where the first chamfer is located, the second protective layer is located on the side of the first filling glue away from the base substrate. In the non-chamfer area, the second protective layer is located on the side of the first filling glue or the second filling glue away from the base substrate. In the area where the second chamfer is located, the second protective layer is located on the side of the second filling glue close to the base substrate.

18. The display panel according to claim 17, wherein: The second protective layer includes a first region, a second region and a third region connected in sequence; Along the direction from the display function layer to the base substrate, the first area covers the first chamfer; along the first direction, the second area covers the first edge; along the direction from the base substrate to the display function layer, the third area covers the second chamfer.

19. The display panel according to claim 18, wherein: The first filling glue is filled in an area enclosed by the first area, the second protective layer of the second area of ​​the first part, and the first chamfered surface; the second filling glue is filled in an area enclosed by the third area, the second protective layer of the second area of ​​the second part, and the second chamfered surface; and at least one of the first filling glue or the second filling glue is filled between the second protective layer and the non-chamfered area of ​​the second area of ​​the third part; The first portion second area, the third portion second area and the second portion second area are arranged in sequence along a direction from the display function layer to the base substrate.

20. The display panel according to claim 13, wherein The protective layer is a blackened layer.

21. The display panel according to claim 1, wherein In a non-chamfered area between the first chamfer and the second chamfer, the first filling glue and the second filling glue overlap in the first direction; In the overlapping area, the first filling glue is located on a side of the second filling glue close to the base substrate.

22. The display panel according to claim 21, wherein: The first filling glue extends to the second chamfer, and a surface of the first filling glue close to the second chamfer is connected with and coplanar with the second chamfer surface.

23. The display panel according to claim 1, wherein The first filling glue covers the first chamfered area, and the second filling glue covers the second chamfered area; one or both of the first filling glue and the second filling glue cover the non-chamfered area; the first filling glue and the second filling glue are connected, and the two are flush with the edge of the outer side of the base substrate.

24. The display panel according to claim 1, wherein The display function layer includes a pixel circuit layer and a light-emitting element, and the pixel circuit layer includes at least one planarization layer; The display panel includes a display area and a non-display area, the planarization layer is located in the display area, and an edge of the planarization layer is located between the display area and an edge of the base substrate; The device further comprises a filling layer, wherein the filling layer is located in the non-display area and at least fills an edge of the planarization layer.

25. The display panel according to claim 24, wherein: It also includes a light shielding layer located on a side of the filling layer away from the base substrate and a transparent optical adhesive layer located on a side of the light shielding layer away from the base substrate.

26. The display panel according to claim 25, wherein: The filling layer, the light-shielding layer and the transparent optical adhesive layer are all formed by an inkjet printing process.

27. The display panel according to claim 24, wherein: The first edge has no edge line, the end surface of the filling layer away from the display area is in a planar state, and the end surface of the filling layer is connected with the first chamfered surface and is coplanar.

28. The display panel according to claim 25, wherein: The first edge is further provided with an edge line, and an end surface of at least one of the filling layer, the light shielding layer and the transparent optical adhesive layer away from the display area is in a curved state.

29. The display panel according to claim 28, wherein: The first filling glue covers the filling layer, the light shielding layer and the edge of the transparent optical adhesive layer away from the display area.

30. A display device, characterized in that: The display panel comprises any one of claims 1 to 29.

31. The display device according to claim 30, wherein: The display panel comprises at least two spliced ​​display panels, wherein a first edge of the display panel is a spliced ​​edge, and the spliced ​​edge of the display panel is adjacent to a spliced ​​edge of another display panel.

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