Display panel and display device

Abstract

The embodiment of the present invention discloses a display panel and a display device. The display panel includes: a hollow area, the hollow area is arranged in the display area of ​​the display panel; a buffer area, the buffer area is arranged around the hollow area, and the buffer area includes at least one groove, and the groove is arranged around the hollow area in the buffer area. The embodiment of the present invention extends or blocks the crystallization path of the organic layer by arranging the groove in the buffer area around the hollow area, slowing down or avoiding the crystallization of the organic layer in the display area. In addition, the appearance defects of the display panel caused by the diffusion of the crystallization of the organic layer are reduced or avoided.

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] As the screen-to-body ratio of electronic devices continues to increase, the technology of opening holes in the screen to accommodate sensors is becoming more and more popular.

[0003] However, for blind hole screens, in order to improve the optical transmittance of the hollow area and improve the quality of optical information received by the optical components under the hollow area, UV glue (ultraviolet light curing glue) needs to be filled in the hollow area. However, there is a risk of uncured components overflowing from UV glue during reliability verification, which will cause the organic film layer of the OLED device to crystallize, resulting in poor appearance of the display panel. Summary of the invention

[0004] The invention provides a display panel and a display device, which are used to slow down or eliminate the crystallization of an organic film layer caused by overflow of UV glue.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, comprising:

[0006] a hollowed-out area, the hollowed-out area being arranged in a display area of ​​the display panel;

[0007] A buffer zone is arranged around the hollowed-out zone, and the buffer zone comprises at least one groove, and the groove is arranged around the hollowed-out zone in the buffer zone.

[0008] Optionally, the groove includes a first inner wall which is parallel to the surface of the buffer zone and faces opposite to the surface of the buffer zone.

[0009] Optionally, the first inner wall surrounds the opening of the groove.

[0010] Optionally, the groove includes a second inner wall which is parallel to the surface of the buffer zone and faces opposite to the surface of the buffer zone.

[0011] Optionally, the first inner wall and the second inner wall are respectively arranged on two sides of the groove opening.

[0012] Optionally, the second inner wall surrounds the opening of the groove.

[0013] Optionally, a longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes a first line segment and a second line segment, and an extension line of the first line segment and the second line segment or an extension line of the second line segment intersects at a side opposite to the first line segment and away from the opening of the groove;

[0014] The first line segment is a line segment formed by part of the inner wall of the groove in the longitudinal section of the groove, the second line segment is a line segment formed by the surface of the buffer zone in the longitudinal section of the groove, and the tangent point of the tangent line of the groove is located in the longitudinal section.

[0015] Optionally, the longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes the second line segment and a third line segment, the third line segment is a curved segment, and any tangent line of the third line segment intersects with the second line segment or an extension line of the second line segment at a side opposite to the third line segment and away from the groove opening;

[0016] Among them, the third line segment is a line segment formed by part of the inner wall of the groove in the longitudinal section of the groove, the second line segment is a line segment formed by the surface of the buffer zone in the longitudinal section of the groove, and the tangent point of the tangent line of the groove is located in the longitudinal section.

[0017] Optionally, the longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes the second line segment and a fourth line segment, the fourth line segment is a curved segment, a tangent line of the fourth line segment is parallel to the second line segment, and the surface where the fourth line segment is located is at least partially opposite to the surface where the second line segment is located;

[0018] Among them, the fourth line segment is a line segment formed by part of the inner wall of the groove in the longitudinal section of the groove, the second line segment is a line segment formed by the surface of the buffer zone in the longitudinal section of the groove, and the tangent point of the tangent line of the groove is located in the longitudinal section.

[0019] Optionally, the longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes the fifth line segment and the sixth line segment, and the angle formed by the surface of the buffer zone and the fifth line segment is greater than or equal to a preset angle, and the angle formed by the surface of the buffer zone and the sixth line segment is greater than or equal to a preset angle;

[0020] Among them, the fifth line segment is a line segment formed by the first side wall of the groove in the longitudinal section of the groove, the sixth line segment is a line segment formed by the second side wall of the groove in the longitudinal section of the groove, the preset angle is just enough to make the inner wall of the groove coated with the evaporated material during the evaporation process, and the tangent point of the tangent of the groove is located in the longitudinal section.

[0021] Optionally, the display panel includes an array substrate, the array substrate includes a pixel defining layer, and the groove is formed by removing at least a portion of the pixel defining layer located at the groove.

[0022] Optionally, a base substrate is further included, and the buffer zone is located on the base substrate.

[0023] Optionally, a buffer layer is also included, and the buffer zone includes the buffer layer.

[0024] In a second aspect, an embodiment of the present invention further provides a display device, characterized in that it comprises any one of the display panels described above.

[0025] The display panel of the embodiment of the present invention comprises: a hollow area, which is arranged in the display area of ​​the display panel; and a buffer area, which is arranged around the hollow area, and the buffer area comprises at least one groove, which is arranged around the hollow area in the buffer area. By arranging the grooves in the buffer area around the hollow area, the crystallization path of the organic layer is extended or blocked, and the crystallization of the organic layer in the display area is slowed down or avoided. In addition, the appearance defects of the display panel caused by the diffusion of the crystallization of the organic layer are reduced or avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a display panel provided by the prior art;

[0027] Figure 2 for Figure 1 Enlarged view of the cross section at the dotted line;

[0028] Figure 3 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0029] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at the dotted line of the buffer zone;

[0030] Figure 5 for Figure 3 Another schematic diagram of the cross-section structure at the dotted line of the buffer zone;

[0031] Figure 6 for Figure 3 Another schematic diagram of the cross-section structure at the dotted line of the buffer zone;

[0032] Figure 7 for Figure 3 Another schematic diagram of the cross-section structure at the dotted line of the buffer zone;

[0033] Figure 8 for Figure 3 Schematic diagram of the longitudinal section structure at the dotted line of the buffer zone;

[0034] Fig. 9 for Figure 3 Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone;

[0035] Fig.10 for Figure 3Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone;

[0036] Fig.11 for Figure 3 Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone;

[0037] Fig.12 for Figure 3 Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone;

[0038] Fig.13 for Figure 3 Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone;

[0039] Fig.14 for Figure 3 Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone;

[0040] Fig.15 for Figure 3 Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone;

[0041] Fig.16 A schematic diagram of the cross-sectional structure of a display area of ​​a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the structure of existing OLED display panels, since there is a need to place devices such as cameras or optical sensors under the screen in some practical situations, it is often necessary to set a hollow area on the screen. Figure 1 A schematic diagram of a display panel provided by the prior art, see Figure 1 The buffer area 13 is disposed between the display area 11 and the hollow area 12. Figure 2 for Figure 1 For an enlarged view of the cross section at the dotted line, see Figure 2. A display area 11, a hollow area 12 and a buffer area 13 are respectively arranged on one side of the substrate 16, and the hollow area 12 is filled with UV glue. A camera 15 is arranged on the other side of the substrate. The upper surface of the buffer area 13 is flat, and the organic light-emitting layer evaporated on the surface of the buffer area 13 connects the display area 11 and the organic light-emitting layer on the surface of the hollow area 12, and the area of ​​the organic light-emitting layer on the surface of the buffer area 13 is small. Therefore, after the UV glue is injected into the hollow area 12, some uncured UV glue may overflow in the reliability verification link, and these overflowed UV glues will cause the organic layer of the display panel to crystallize, for example, the organic film layer (capping layer) or organic light-emitting layer of the top layer of the OLED device may be affected. In particular, the organic light-emitting layer, after the UV glue contacts the organic light-emitting layer, the crystallization can diffuse along the organic light-emitting layer. Since the surface of the buffer area 13 is flat, the organic light-emitting layer on the surface will diffuse the crystallization of the hollow area 12 to the display area 11 in a relatively short time, resulting in appearance defects of the display panel and affecting the display effect of the display area.

[0044] Therefore, an embodiment of the present invention provides a display panel. Figure 3 A schematic diagram of a display panel according to an embodiment of the present invention is shown in FIG. Figure 3 , which include:

[0045] A hollow area 12, wherein the hollow area 12 is disposed in the display area 11 of the display panel;

[0046] The buffer zone 13 is arranged around the hollow zone 12 . The buffer zone 13 includes at least one groove 14 . The groove 14 is arranged around the hollow zone 12 and in the buffer zone 13 .

[0047] Among them, the hollowed-out area 12 can be of any shape, and the hollowed-out area 12 can be located in the display area of ​​the display panel, or at the edge of the display area of ​​the display panel, and its shape and position can be set according to actual needs. Exemplarily, the hollowed-out area 12 can be located in a circle in the display panel. By setting a groove 14 in the buffer zone 13, the distance of crystallization diffusion is increased; or because the buffer zone 13 is provided with a groove 14, the hollowed-out area 12 of the display panel cannot be connected to the organic light-emitting layer of the display area 11 during the evaporation process, thereby blocking the diffusion of crystallization. Improve the display effect of the display area. The embodiment of the present invention does not set the shape of the groove 14, and it is sufficient to meet the above description. And the shapes of several grooves 14 will be introduced below, taking the buffer zone as a ring as an example.

[0048] Figure 4 for Figure 3 Schematic diagram of the cross-section structure at the dotted line of the buffer zone, see Figure 4In some other embodiments, the groove includes a first inner wall 141 which is parallel to the surface of the buffer zone 13 and faces opposite to the surface of the buffer zone 13 .

[0049] The first inner wall 141 at least partially surrounds the opening of the groove 14. When the organic light-emitting layer is evaporated, the first inner wall 141 is opposite to the surface of the buffer zone 13, and the organic light-emitting material vapor cannot form an organic light-emitting layer 21 (the organic light-emitting layer 21 is not shown in other embodiments below) on the first inner wall 141. Therefore, at least part of the buffer zone 13 forms a fault of the organic light-emitting layer between the hollow area and the display area, which has a certain blocking effect on the transmission of the crystallization of the organic light-emitting layer.

[0050] Based on the previous embodiment, the first inner wall 141 surrounds the opening of the groove.

[0051] Since the first inner wall 141 completely surrounds the opening of the groove, the buffer zone 13 forms a fault of the organic light-emitting layer between the hollowed-out area and the display area, which blocks the transfer of crystallization of the organic light-emitting layer.

[0052] Figure 5 for Figure 3 Another cross-sectional structural diagram at the dotted line of the buffer zone, see Figure 5 Based on the previous embodiment, the groove includes a second inner wall 142 which is parallel to the surface of the buffer zone 13 and faces opposite to the surface of the buffer zone 13 .

[0053] The second inner wall 142 may be arranged around a part of the opening of the groove, or around the entire opening of the groove. When the second inner wall 142 surrounds the entire opening of the groove, adding the second inner wall 142 on the basis of the first inner wall 141 can make the buffer zone 13 form a fault of two organic light-emitting layers. Therefore, the reliability of blocking the crystallization transfer of the organic light-emitting layer is higher.

[0054] Figure 6 for Figure 3 Another cross-sectional structural diagram at the dotted line of the buffer zone, Figure 7 for Figure 3 Another cross-sectional structural diagram at the dotted line of the buffer zone, see Figure 6 and Figure 7 Based on the previous embodiment, the first inner wall 141 and the second inner wall 142 are respectively arranged on two sides of the groove opening.

[0055] Figure 8 for Figure 3 Schematic diagram of the longitudinal section structure at the dotted line of the buffer zone, see Figure 8In some other embodiments, a longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes a first line segment 143 and a second line segment 144, and an extension line of the first line segment 143 and a second line segment or an extension line of the second line segment intersect at a side opposite to the first line segment 143 and away from the groove opening;

[0056] The first line segment 143 is a line segment formed by part of the inner wall of the groove in the longitudinal section of the groove, the second line segment is a line segment formed by the surface of the buffer zone 13 in the longitudinal section of the groove, and the tangent point of the tangent of the groove is located in the longitudinal section.

[0057] Among them, since the inner wall of the groove where the first line segment 143 is located is arranged around the groove opening, the evaporated organic light-emitting material cannot be deposited on the inner wall of the groove where the first line segment 143 is located during evaporation. Therefore, the organic light-emitting layer forms a fault on the inner wall of the groove where the first line segment 143 is located, which blocks the transmission of crystallization of the organic light-emitting layer.

[0058] Fig. 9 for Figure 3 Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone, Fig.10 for Figure 3 Another longitudinal section structure diagram at the dotted line of the buffer zone, see Fig. 9 and Fig.10 In some other embodiments, a longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes a second line segment 144 and a third line segment 145, the third line segment 145 is a curved line segment, and any tangent line of the third line segment 145 intersects with the second line segment 144 or an extension line of the second line segment 144 at a side opposite to the third line segment 145 and away from the opening of the groove;

[0059] The third line segment 145 is a line segment formed by part of the inner wall of the groove in the longitudinal section of the groove, the second line segment 144 is a line segment formed by the surface of the buffer zone 13 in the longitudinal section of the groove, and the tangent point of the tangent of the groove is located in the longitudinal section.

[0060] Among them, since the inner wall of the groove where the third line segment 145 is located is arranged around the groove opening, the evaporated organic light-emitting material cannot be deposited on the inner wall of the groove where the third line segment 145 is located during evaporation. Therefore, the organic light-emitting layer forms a fault on the inner wall of the groove where the third line segment 145 is located, which blocks the transmission of crystallization of the organic light-emitting layer.

[0061] Fig.11 for Figure 3 Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone, Fig.12 for Figure 3 Another longitudinal section structure diagram at the dotted line of the buffer zone, see Fig.11 and Fig.12In some other embodiments, a longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes a second line segment 144 and a fourth line segment 146, the fourth line segment 146 is a curved line segment, a tangent line of the fourth line segment 146 is parallel to the second line segment 144, and a surface where the fourth line segment 146 is located is at least partially opposite to a surface where the second line segment 144 is located;

[0062] The fourth line segment 146 is a line segment formed by part of the inner wall of the groove in the longitudinal section of the groove, the second line segment 144 is a line segment formed by the surface of the buffer zone 13 in the longitudinal section of the groove, and the tangent point of the tangent of the groove is located in the longitudinal section.

[0063] Among them, since the inner wall of the groove where the fourth line segment 146 is located is arranged around the groove opening, and the surface of the tangent point of the fourth line segment 146 and the tangent line parallel to the second line segment 144 is opposite to the surface of the buffer zone 13, the evaporated organic light-emitting material cannot be deposited. As a result, the organic light-emitting layer forms a fault on the inner wall of the groove where the fourth line segment 146 is located, which has a blocking effect on the transmission of crystallization of the organic light-emitting layer.

[0064] Fig.13 for Figure 3 Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone, Fig.14 for Figure 3 Another schematic diagram of the longitudinal section structure at the dotted line of the buffer zone, Fig.15 for Figure 3 Another longitudinal section structure diagram at the dotted line of the buffer zone, see Fig.13 , Fig.14 and Fig.15 In some other embodiments, a longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes a fifth line segment 147 and a sixth line segment 148, and an angle formed by the surface of the buffer zone 13 and the fifth line segment 147 is greater than or equal to a preset angle, and an angle formed by the surface of the buffer zone 13 and the sixth line segment 148 is greater than or equal to a preset angle;

[0065] Among them, the fifth line segment 147 is the line segment formed by the first side wall of the groove in the longitudinal section of the groove, and the sixth line segment 148 is the line segment formed by the second side wall of the groove in the longitudinal section of the groove. The preset angle is just enough to make the inner wall of the groove be coated with the evaporated material during the evaporation process, and the tangent point of the tangent of the groove is located in the longitudinal section.

[0066] Among them, the preset angle can be determined according to actual needs or actual evaporation equipment. During the evaporation process, since the angle between the fifth line segment 147 and the surface of the buffer zone 13 is greater than or equal to the preset angle, the angle between the sixth line segment 148 and the surface of the buffer zone 13 is greater than or equal to the preset angle. Therefore, the inner walls of the grooves where the fifth line segment 147 and the sixth line segment 148 are located are coated with an organic light-emitting layer. Compared with the existing technical solution in which the surface of the buffer zone 13 is coated with an organic light-emitting layer, the technical solution in which the groove in the buffer zone 13 is coated with an organic light-emitting layer in the embodiment of the present invention can make the distance required for the crystallization and diffusion of the organic light-emitting layer longer and take more time. The time for the organic light-emitting layer to crystallize and diffuse to the display area is extended.

[0067] The above-mentioned multiple embodiments all describe partial groove inner walls. In actual use, other groove inner walls can be added according to actual needs to form a complete groove inner wall. Other groove inner walls can be one or more of straight surfaces, curved surfaces or surfaces of any other shape, and the embodiments of the present invention do not limit the shapes of other groove inner walls.

[0068] The buffer zone with grooves in the embodiment of the present invention can be applied to any OLED display panel. An OLED display panel having a buffer zone with grooves in the embodiment of the present invention is exemplarily given below. Fig.16 A schematic diagram of a cross-sectional structure of a display area of ​​a display panel provided by an embodiment of the present invention, referring to Fig.16 . The display panel provided in this embodiment may be an organic light-emitting display panel, which includes a substrate substrate 100 and a thin film transistor 110 and a first light-emitting element 21 arranged on one side of the substrate substrate 100. The substrate substrate 100 may be a rigid substrate, such as a glass substrate, or a flexible substrate, such as a polyimide substrate. The thin film transistor 110 includes an active layer 111, a gate 112, a drain 113 and a source 114, wherein the drain 113 is electrically connected to the second electrode 212 of the first light-emitting element 21 for driving the first light-emitting element 21 to emit light. The first light-emitting element 21 includes a first electrode 211, a second electrode 212 and a light-emitting layer 213 located between the first electrode 211 and the second electrode 212. The display panel also includes a buffer layer 101, a plurality of insulating layers 102 ( Fig.16 Schematically showing two insulating layers), a planarization layer 103, a pixel defining layer 104 and a multi-layered thin film encapsulation layer 105 ( Fig.16 In the figure, three film layers are schematically shown, and in other embodiments, a touch electrode layer may be included. The specific film layers and their positional relationships may be set according to actual needs.

[0069] Continue to refer Fig.16In some other embodiments, the display panel includes an array substrate, the array substrate includes a pixel defining layer 104, and the groove is formed by removing at least a portion of the pixel defining layer 104 located at the groove.

[0070] The buffer area 13 may have the same film structure as the display area, that is, the buffer area 13 may be composed of one or more film structures such as a buffer layer 101, an insulating layer 102, a planarization layer 103, a pixel defining layer 104, and a thin film encapsulation layer 105. Any etching process may be used to etch one or more of the above film structures in a preset area to form a groove.

[0071] Continue to refer Fig.16 In some other embodiments, a base substrate is further included, and the buffer zone 13 is located on the base substrate 100 .

[0072] Among them, the base substrate can be a LTPS substrate.

[0073] An embodiment of the present invention further provides a display device, comprising the display panel in any one of the above embodiments.

[0074] Since the embodiment of the present invention includes the display panel in any of the above embodiments, it has the corresponding beneficial effects of any of the above embodiments.

[0075] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by 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 more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: include: a hollowed-out area, the hollowed-out area being arranged in a display area of ​​the display panel; A buffer zone, the buffer zone is arranged around the hollowed-out zone, the buffer zone comprises at least one groove, the groove is arranged around the hollowed-out zone in the buffer zone, so as to slow down or eliminate the crystallization of the organic film layer caused by the overflow of UV glue; The groove comprises a first inner wall which is parallel to the surface of the buffer zone and faces opposite to the surface of the buffer zone; The groove includes a second inner wall which is parallel to the surface of the buffer zone and faces opposite to the surface of the buffer zone, and the first inner wall and the second inner wall are arranged on the same side of the groove opening.

2. The display panel according to claim 1, characterized in that: The first inner wall surrounds the opening of the groove.

3. The display panel according to claim 1, characterized in that: The second inner wall surrounds the opening of the groove.

4. The display panel according to claim 1, characterized in that: A longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes a first line segment and a second line segment, and an extension line of the first line segment and the second line segment or an extension line of the second line segment intersects at a side opposite to the first line segment and away from the opening of the groove; The first line segment is a line segment formed by part of the inner wall of the groove in the longitudinal section of the groove, the second line segment is a line segment formed by the surface of the buffer zone in the longitudinal section of the groove, and the tangent point of the tangent of the groove is located in the longitudinal section.

5. The display panel according to claim 1, characterized in that: A longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes a second line segment and a third line segment, the third line segment is a curved segment, and any tangent line of the third line segment intersects with the second line segment or an extension line of the second line segment at a side opposite to the third line segment and away from the opening of the groove; Among them, the third line segment is a line segment formed by part of the inner wall of the groove in the longitudinal section of the groove, the second line segment is a line segment formed by the surface of the buffer zone in the longitudinal section of the groove, and the tangent point of the tangent line of the groove is located in the longitudinal section.

6. The display panel according to claim 1, characterized in that: A longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes a second line segment and a fourth line segment, the fourth line segment is a curved line segment, a tangent line of the fourth line segment is parallel to the second line segment, and a surface where the fourth line segment is located is at least partially opposite to a surface where the second line segment is located; Among them, the fourth line segment is a line segment formed by part of the inner wall of the groove in the longitudinal section of the groove, the second line segment is a line segment formed by the surface of the buffer zone in the longitudinal section of the groove, and the tangent point of the tangent line of the groove is located in the longitudinal section.

7. The display panel according to claim 1, characterized in that: A longitudinal section perpendicular to the plane where the display panel is located and perpendicular to the tangent direction of the groove includes a fifth line segment and a sixth line segment, an angle formed by the surface of the buffer zone and the fifth line segment is greater than or equal to a preset angle, and an angle formed by the surface of the buffer zone and the sixth line segment is greater than or equal to a preset angle; Among them, the fifth line segment is the line segment formed by the first side wall of the groove in the longitudinal section of the groove, the sixth line segment is the line segment formed by the second side wall of the groove in the longitudinal section of the groove, the preset angle is just enough to make the inner wall of the groove coated with the evaporated material during the evaporation process, and the tangent point of the tangent of the groove is located in the longitudinal section.

8. The display panel according to claim 1, characterized in that: The display panel includes an array substrate, the array substrate includes a pixel defining layer, and the groove is formed by removing at least a portion of the pixel defining layer located at the groove.

9. The display panel according to claim 1, characterized in that: Also included is a base substrate, on which the buffer zone is located.

10. The display panel according to claim 1, characterized in that: A buffer layer is also included, and the buffer zone includes the buffer layer.

11. A display device, characterized in that: Comprising the display panel according to any one of claims 1 to 10.

Images