Display panel and manufacturing method therefor, and display device

Abstract

The present disclosure belongs to the technical field of display. Provided are a display panel and a manufacturing method therefor, and a display device. The display panel comprises an opening area, a first isolation area, a second isolation area and an active area, wherein the second isolation area is disposed around the first isolation area; and the active area is disposed around the second isolation area. The display panel comprises: a drive substrate; an isolation structure disposed on one side of the drive substrate, located in the second isolation area and disposed around the first isolation area; a light-emitting functional layer disposed on the side of the isolation structure away from the drive substrate; and encapsulation layers, which are disposed on the side of the light-emitting functional layer away from the drive substrate and cover the isolation structure, wherein the orthographic projection of the light-emitting functional layer on the drive substrate does not overlap with the orthographic projection of at least part of the first isolation area on the drive substrate. The present disclosure can prevent GDS defects from occurring in the active area.

Description

Display panel, manufacturing method thereof and display device

[0001] Cross-reference to related applications

[0002] The present application claims priority to Chinese Patent Application No. 202410831347.4, filed on June 25, 2024, the contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of display, and particularly refers to a display panel, a manufacturing method thereof and a display device. BACKGROUND

[0004] In related organic light-emitting diode (OLED) display panels, a hole is often punched on the screen to accommodate devices such as cameras and sensors, but the hole punched on the screen is easy to expose the film layer of the OLED, and a isolation column needs to be set to block the water and oxygen intrusion channel formed by the electro-luminescence (EL) functional layer, so as to avoid causing the growing dark spot (GDS) and other defects in the active area (AA). SUMMARY

[0005] The technical problem to be solved by the present disclosure is to provide a display panel, a manufacturing method thereof and a display device, which can avoid GDS defects in the display area.

[0006] To solve the above technical problems, the technical solutions of the embodiments of the present disclosure are as follows:

[0007] In one aspect, a display panel is provided, comprising a hole area, a first isolation area, a second isolation area and a display area, the first isolation area is arranged around the hole area, the second isolation area is arranged around the first isolation area, and the display area is arranged around the second isolation area, and the display panel comprises:

[0008] a driving substrate;

[0009] an isolation structure arranged on one side of the driving substrate, located in the second isolation area and arranged around the first isolation area;

[0010] an electro-luminescence (EL) functional layer arranged on the side of the isolation structure away from the driving substrate;

[0011] an encapsulation layer arranged on the side of the EL functional layer away from the driving substrate and covering the isolation structure;

[0012] The orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate.

[0013] In some embodiments, the display panel further comprises a cathode layer on a side of the light-emitting functional layer away from the driving substrate, and the orthographic projection of the cathode layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate.

[0014] In some embodiments, the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least part of the second isolation region on the driving substrate.

[0015] In some embodiments, in a direction away from the driving substrate, the encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer stacked in sequence.

[0016] The orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate.

[0017] In some embodiments, the orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least part of the second isolation region on the driving substrate.

[0018] In some embodiments, the display panel comprises an inorganic pixel definition layer between the driving substrate and the light-emitting functional layer.

[0019] In the first isolation region, the second inorganic encapsulation layer is in direct contact with the inorganic pixel definition layer, or the second inorganic encapsulation layer is in direct contact with the driving substrate.

[0020] In some embodiments, the display panel further comprises:

[0021] An auxiliary cathode trace in the first isolation region and the second isolation region, the auxiliary cathode trace being connected to the cathode of a pixel in the display area.

[0022] In some embodiments, in a first direction, the auxiliary cathode trace extends from a display area on a first side of the first isolation region and the second isolation region to a display area on a second side of the first isolation region and the second isolation region, the first side and the second side being opposite sides.

[0023] In a second direction, the auxiliary cathode trace extends from a display area on a third side of the first isolation region and the second isolation region to a display area on a fourth side of the first isolation region and the second isolation region, the third side and the fourth side being opposite sides.

[0024] The first direction is perpendicular to the second direction.

[0025] In some embodiments, along a direction away from the driving substrate, the auxiliary cathode trace includes a first film layer, a second film layer and a third film layer arranged in a stack, the first film layer and the light-emitting functional layer of the sub-pixel of the first color of the display area are made of the same material, the second film layer and the cathode of the sub-pixel of the first color of the display area are made of the same material, and the second film layer and the first inorganic encapsulation layer of the sub-pixel of the first color of the display area are made of the same material.

[0026] In some embodiments, the display area includes first, second and third sub-pixels of different colors, and the auxiliary cathode trace includes first and second auxiliary traces arranged in a stack or arranged side by side.

[0027] Along a direction away from the driving substrate, the first auxiliary trace includes a fourth film layer, a fifth film layer and a sixth film layer arranged in a stack, the fourth film layer and the light-emitting functional layer of the first sub-pixel are made of the same material, the fifth film layer and the cathode of the first sub-pixel are made of the same material, and the sixth film layer and the first inorganic encapsulation layer of the first sub-pixel are made of the same material.

[0028] Along a direction away from the driving substrate, the second auxiliary trace includes a seventh film layer, an eighth film layer and a ninth film layer arranged in a stack, the seventh film layer and the light-emitting functional layer of the second sub-pixel are made of the same material, the eighth film layer and the cathode of the second sub-pixel are made of the same material, and the ninth film layer and the first inorganic encapsulation layer of the second sub-pixel are made of the same material.

[0029] In some embodiments, the display area includes a pixel defining layer and a plurality of sub-pixels defined by the pixel defining layer, the pixel defining layer is provided with an undercut structure on a side away from the driving substrate, and the light-emitting functional layer and the cathode of the sub-pixel are broken at the undercut structure.

[0030] In some embodiments, the undercut structure includes a fourth source-drain metal layer and an inorganic insulating layer arranged in a stack, the fourth source-drain metal layer is located between the inorganic insulating layer and the pixel defining layer, and a normal projection of the fourth source-drain metal layer on the driving substrate is located within a normal projection of the inorganic insulating layer on the driving substrate.

[0031] The display panel is also provided in the embodiments of the present disclosure.

[0032] The display panel manufacturing method comprises:

[0033] forming a driving substrate;

[0034] forming an isolation structure on the driving substrate, the isolation structure being located in the second isolation region and surrounding the first isolation region;

[0035] forming a light-emitting functional layer on the driving substrate, and removing the light-emitting functional layer of at least part of the first isolation region, so that the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate;

[0036] forming an encapsulation layer, the encapsulation layer covering the isolation structure.

[0037] In some embodiments, the method further comprises:

[0038] removing the light-emitting functional layer of at least part of the second isolation region, so that the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least part of the second isolation region on the driving substrate.

[0039] In some embodiments, forming the encapsulation layer comprises: forming a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer which are sequentially stacked; and the method further comprises:

[0040] removing the first inorganic encapsulation layer of at least part of the first isolation region, so that the orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate.

[0041] In some embodiments, the method further comprises:

[0042] removing the first inorganic encapsulation layer of at least part of the second isolation region, so that the orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least part of the second isolation region on the driving substrate.

[0043] In some embodiments, the display region comprises first, second and third sub-pixels which are different in color; and the method specifically comprises:

[0044] forming a first light-emitting functional layer, a first cathode and a first inorganic encapsulation layer on the driving substrate, the first light-emitting functional layer being a light-emitting functional layer corresponding to the first sub-pixel;

[0045] forming a photoresist covering the first sub-pixel;

[0046] removing the first light-emitting functional layer, the first cathode and the first inorganic encapsulation layer in the region where the second sub-pixel and the third sub-pixel are located, and removing at least part of the first light-emitting functional layer, the first cathode and the first inorganic encapsulation layer in the first isolation region, with the photoresist as a mask;

[0047] forming a second light-emitting functional layer, a second cathode and a first inorganic encapsulation layer on the driving substrate, the second light-emitting functional layer being the light-emitting functional layer corresponding to the second sub-pixel;

[0048] forming a photoresist covering the second sub-pixel;

[0049] removing the second light-emitting functional layer, the second cathode and the first inorganic encapsulation layer in the region where the first sub-pixel and the third sub-pixel are located, and removing at least part of the second light-emitting functional layer, the second cathode and the first inorganic encapsulation layer in the first isolation region, with the photoresist as a mask;

[0050] forming a third light-emitting functional layer, a third cathode and a first inorganic encapsulation layer on the driving substrate, the third light-emitting functional layer being the light-emitting functional layer corresponding to the third sub-pixel;

[0051] forming a photoresist covering the third sub-pixel;

[0052] removing the third light-emitting functional layer, the third cathode and the first inorganic encapsulation layer in the region where the first sub-pixel and the second sub-pixel are located, and removing at least part of the third light-emitting functional layer, the third cathode and the first inorganic encapsulation layer in the first isolation region, with the photoresist as a mask;

[0053] forming an organic encapsulation layer;

[0054] forming a second inorganic encapsulation layer.

[0055] In some embodiments, the method further comprises:

[0056] forming an auxiliary cathode trace in the first isolation region and the second isolation region, the auxiliary cathode trace being connected to the cathode of the pixel in the display region.

[0057] In some embodiments, forming the auxiliary cathode trace comprises:

[0058] forming the light-emitting functional layer, the cathode, the first inorganic encapsulation layer and the auxiliary cathode trace of the sub-pixel of one color in the display region through one patterning process.

[0059] In some embodiments, the display region includes first, second and third sub-pixels with different colors; the auxiliary cathode wire includes first and second auxiliary wires arranged in a stack, or the auxiliary cathode wire includes first and second auxiliary wires arranged side by side; forming the auxiliary cathode wire includes:

[0060] forming the light-emitting functional layer, the cathode, the first inorganic encapsulation layer and the first auxiliary wire of the first sub-pixel through a one-time patterning process;

[0061] forming the light-emitting functional layer, the cathode, the first inorganic encapsulation layer and the second auxiliary wire of the second sub-pixel through a one-time patterning process.

[0062] Embodiments of the present disclosure have the following beneficial effects:

[0063] In the above scheme, the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate, so that there is no continuous light-emitting functional layer in the first isolation region, a continuous water vapor intrusion path cannot be formed in the first isolation region, water vapor intrusion along the light-emitting functional layer of the first isolation region into the display region can be avoided, GDS defects caused by water vapor intrusion due to exposure of the light-emitting functional layer can be improved, GDS defects in the display region can be avoided, and the display effect of the display panel can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0064] FIG. 1 is a structural schematic diagram of an OLED display panel in the related art;

[0065] FIG. 2 is a structural schematic diagram of a display panel according to an embodiment of the present disclosure;

[0066] FIGS. 3-8 are schematic diagrams of the display panel according to an embodiment of the present disclosure with an auxiliary cathode wire;

[0067] FIGS. 9-12 are schematic diagrams of manufacturing a display panel in the related art;

[0068] FIGS. 13-19 are schematic diagrams of manufacturing a display panel according to an embodiment of the present disclosure.

[0069] 01 substrate 02 first source-drain metal layer 03 first planarization layer 04 second source-drain metal layer 05 second planarization layer 06 third source-drain metal layer 07 third planarization layer 08 inorganic pixel definition layer 09 anode 10 fourth source-drain metal layer 11 inorganic insulating layer 12 first inorganic encapsulation layer 13 photoresist 14 light-emitting functional layer 15 cathode 21 driving substrate 41 inorganic pixel definition layer 22 light-emitting functional layer of red sub-pixel 23 cathode 24 first inorganic encapsulation layer 25 organic encapsulation layer 26 second inorganic encapsulation layer 27 planarization layer 28 isolation structure 29 inner isolation column 30 outer isolation column 31 scribe line 32 light-emitting functional layer of blue sub-pixel 33 light-emitting functional layer of green sub-pixel DETAILED DESCRIPTION

[0070] To make the technical problems, technical solutions and advantages to be solved by the embodiments of the present disclosure clearer, the following will be described in detail with reference to the drawings and specific embodiments.

[0071] The embodiments of the present disclosure will be described in detail below with reference to the drawings. The embodiments can be implemented in various forms. Those skilled in the art can easily understand that the manner and content can be changed into various forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the content described in the following embodiments. The embodiments in the present disclosure and the features in the embodiments can be combined with each other arbitrarily without conflict. In order to keep the following description of the embodiments of the present disclosure clear and brief, the present disclosure omits the detailed description of some known functions and known components. The drawings of the embodiments of the present disclosure only involve the structures related to the embodiments of the present disclosure, and other structures can be referred to the general design.

[0072] The proportions of the drawings in the present disclosure can be used as a reference in the actual process, but are not limited thereto. For example, the thickness and interval of each film layer, the width and interval of each signal line can be adjusted according to the actual situation. The drawings described in the present disclosure are only schematic structural diagrams, and one embodiment of the present disclosure is not limited to the shapes or values shown in the drawings.

[0073] The ordinal numbers "first", "second", "third" and the like in the present specification are set to avoid confusion of the constituent elements, and are not intended to be limiting in terms of number.

[0074] In this specification, terms of "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicating the positional or directional relationship are used to describe the positional relationship of the components with reference to the drawings for the convenience of explanation and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present disclosure. The positional relationship of the components is appropriately changed according to the direction in which each component is described. Therefore, the terms described in the specification are not limited, and can be appropriately changed according to the situation.

[0075] In this specification, unless explicitly defined and limited otherwise, the terms "mount", "connected", "connected" should be broadly understood. For example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate, or communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0076] In this specification, "electrically connected" includes the case where the components are connected together through an element having a certain electrical effect. The "element having a certain electrical effect" is not particularly limited as long as it can perform the transmission of electrical signals between the connected components. Examples of the "element having a certain electrical effect" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, other elements having one or more functions, and the like.

[0077] In this specification, "parallel" means that the angle formed by two straight lines is -10° or more and 10° or less, and therefore can include the case where the angle is -5° or more and 5° or less. In addition, "perpendicular" means that the angle formed by two straight lines is 80° or more and 100° or less, and therefore can include the case where the angle is 85° or more and 95° or less.

[0078] In this specification, "film" and "layer" can be interchanged. For example, "conductive layer" can be replaced by "conductive film". Similarly, "insulating film" can be replaced by "insulating layer".

[0079] In this specification, a triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, etc. are not strictly, and can be an approximate triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, etc. There can be some small deformation due to tolerance, there can be an angle, an arc edge, and deformation, etc.

[0080] In the present disclosure, "about" means not strictly limited boundaries, allowing values within the range of process and measurement errors.

[0081] The "thickness" in the present disclosure is the dimension of a film layer in the direction perpendicular to the substrate.

[0082] FIG. 1 is a schematic diagram of an OLED display panel in the related art. As shown in FIG. 1, the display panel includes an opening area, a first isolation area, a second isolation area, and a display area. A sensor device such as a camera can be disposed in the opening area. The display panel includes film layers such as a driving substrate 21, a light-emitting functional layer 22, a cathode 23, a first inorganic encapsulating layer 24, an organic encapsulating layer 25, a second inorganic encapsulating layer 26, and a planarization layer 27. An outer isolation column 30 is disposed in the first isolation area, and an isolation structure 28 and an inner isolation column 29 are disposed in the second isolation area. The outer isolation column 30 and the inner isolation column 29 are undercut structures, so that the light-emitting functional layer 22 and the cathode 23 are broken at the outer isolation column 30 and the inner isolation column 29 to isolate the invading moisture from the outside. However, this structure is unstable, and the moisture can still invade along the cross section of the light-emitting functional layer 22 from the cutting edge 31, or can invade through the crack of the first inorganic encapsulating layer 24 at the undercut structure, resulting in GDS defects in the display area and affecting the display effect of the display panel.

[0083] Embodiments of the present disclosure provide a display panel and a manufacturing method thereof, and a display device, which can avoid GDS defects in the display area.

[0084] Embodiments of the present disclosure provide a display panel, which includes an opening area, a first isolation area, a second isolation area, and a display area. The first isolation area is disposed around the opening area, the second isolation area is disposed around the first isolation area, and the display area is disposed around the second isolation area. The display panel includes:

[0085] a driving substrate;

[0086] an isolation structure disposed on one side of the driving substrate, located in the second isolation area, and disposed around the first isolation area;

[0087] a light-emitting functional layer disposed on a side of the isolation structure away from the driving substrate;

[0088] an encapsulating layer disposed on a side of the light-emitting functional layer away from the driving substrate and covering the isolation structure;

[0089] wherein a normal projection of the light-emitting functional layer on the driving substrate does not overlap with a normal projection of at least part of the first isolation area on the driving substrate.

[0090] In the embodiment, the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate, so that there is no continuous light-emitting functional layer in the first isolation region, a continuous water vapor invasion path cannot be formed in the first isolation region, water vapor can be prevented from invading the display region along the light-emitting functional layer of the first isolation region, GDS defects caused by water vapor invasion due to exposure of the light-emitting functional layer are improved, GDS defects of the display region are avoided, and the display effect of the display panel is improved.

[0091] In some embodiments, the display panel further includes a cathode layer on the side of the light-emitting functional layer away from the driving substrate, and the orthographic projection of the cathode layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate. In the embodiment, part of the cathode layer can be reserved in the first isolation region, or the cathode layer in the first isolation region can be completely removed.

[0092] In the embodiment, part of the light-emitting functional layer can be reserved in the first isolation region, or the light-emitting functional layer in the first isolation region can be completely removed, so that there is no light-emitting functional layer in the first isolation region, a water vapor invasion path cannot be formed in the first isolation region, water vapor can be prevented from invading the display region along the light-emitting functional layer of the first isolation region, GDS defects caused by water vapor invasion due to exposure of the light-emitting functional layer are completely improved, GDS defects of the display region are avoided, and the display effect of the display panel is improved.

[0093] In a specific example of the present disclosure, as shown in FIG. 2, in the second isolation region, the display panel includes a driving substrate 21, an inorganic pixel definition layer 41 on the driving substrate 21, an organic encapsulation layer 25, a second inorganic encapsulation layer 26, and a planarization layer 27; in the first isolation region, the display panel includes the driving substrate 21, the inorganic pixel definition layer 41 on the driving substrate 21, the second inorganic encapsulation layer 26, and the planarization layer 27, the second inorganic encapsulation layer 26 is in direct contact with the inorganic pixel definition layer 41, there is no light-emitting functional layer in the first isolation region, so that a water vapor invasion path cannot be formed in the first isolation region, and water vapor can be prevented from invading the display region along the light-emitting functional layer of the first isolation region. In some embodiments, the inorganic pixel definition layer 41 in the first isolation region can also be removed, so that in the first isolation region, the second inorganic encapsulation layer 26 is in direct contact with the driving substrate 21, there is no light-emitting functional layer in the first isolation region, a water vapor invasion path cannot be formed in the first isolation region, and water vapor can be prevented from invading the display region along the light-emitting functional layer of the first isolation region.

[0094] In the related art, the isolation column arranged in the first isolation region is to cause the light-emitting functional layer to break in the first isolation region, and when there is no light-emitting functional layer in the first isolation region, there is no need to form an isolation column in the first isolation region, and the isolation column in the first isolation region can be removed.

[0095] In some embodiments, the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least part of the second isolation region on the driving substrate. In this way, there is no continuous light-emitting functional layer in the second isolation region, and a continuous water vapor intrusion path cannot be formed in the second isolation region, thereby avoiding water vapor intrusion along the light-emitting functional layer of the second isolation region into the display area and avoiding causing GDS defects in the display area.

[0096] In the present embodiment, part of the light-emitting functional layer can be retained in the second isolation region, or the light-emitting functional layer in the second isolation region can be completely removed. In this way, there is no light-emitting functional layer in the second isolation region, and a water vapor intrusion path cannot be formed in the second isolation region, thereby completely improving the GDS defects caused by water vapor intrusion due to exposure of the light-emitting functional layer.

[0097] In the related art, the isolation column arranged in the second isolation region is to cause the light-emitting functional layer to break in the second isolation region. When there is no light-emitting functional layer in the second isolation region, there is no need to form an isolation column in the second isolation region, and the isolation column in the second isolation region can be removed.

[0098] As shown in FIG. 1, in the display area of the display panel, in a direction away from the driving substrate, the encapsulation layer includes a first inorganic encapsulation layer 24, an organic encapsulation layer 25, and a second inorganic encapsulation layer 26 stacked in sequence. In order to avoid water vapor intrusion through the cracks of the first inorganic encapsulation layer 24, in the present embodiment, the orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate. In this way, there is no continuous first inorganic encapsulation layer in the first isolation region, and water vapor intrusion along the cracks of the first inorganic encapsulation layer of the first isolation region into the display area can be avoided.

[0099] In the present embodiment, part of the first inorganic encapsulation layer can be retained in the first isolation region, or the first inorganic encapsulation layer in the first isolation region can be completely removed. In this way, there is no first inorganic encapsulation layer in the first isolation region, and water vapor cannot intrude into the display area along the cracks of the first inorganic encapsulation layer of the first isolation region.

[0100] In one specific example of the present disclosure, as shown in FIG. 2, in the second isolation region, the display panel includes a driving substrate 21, an inorganic pixel definition layer 41 located on the driving substrate 21, an organic encapsulation layer 25, a second inorganic encapsulation layer 26, and a planarization layer 27. In the first isolation region, the display panel includes the driving substrate 21, the inorganic pixel definition layer 41 located on the driving substrate 21, the second inorganic encapsulation layer 26, and the planarization layer 27, and the second inorganic encapsulation layer 26 directly contacts the inorganic pixel definition layer 41. In this way, there is no first inorganic encapsulation layer in the first isolation region, and water vapor intrusion along the cracks of the first inorganic encapsulation layer of the first isolation region into the display area can be avoided.

[0101] In some embodiments, a projection of the first inorganic encapsulation layer on the driving substrate does not overlap with a projection of at least part of the second isolation region on the driving substrate. In this way, in the absence of the first inorganic encapsulation layer in the second isolation region, water vapor cannot enter the display region through a crack in the first inorganic encapsulation layer of the second isolation region.

[0102] In the present embodiment, part of the first inorganic encapsulation layer can be retained in the second isolation region, or the first inorganic encapsulation layer in the second isolation region can be completely removed. In this way, in the absence of the first inorganic encapsulation layer in the second isolation region, water vapor cannot enter the display region through a crack in the first inorganic encapsulation layer of the second isolation region.

[0103] In the related art, the presence of the first isolation region leads to uneven distribution of cathode signals in the display region around the first isolation region. In order to solve this problem, in the present embodiment, the display panel further comprises an auxiliary cathode trace located in the first isolation region and the second isolation region, and the auxiliary cathode trace is connected to the cathode of a pixel in the display region. In this way, the uneven distribution of cathode signals in the display region can be improved by the auxiliary cathode trace, and the display effect of the display panel can be improved.

[0104] In some embodiments, in the first direction, the auxiliary cathode trace extends from the display region on the first side of the first isolation region and the second isolation region to the display region on the second side of the first isolation region and the second isolation region, and the first side and the second side are opposite sides. In this way, the auxiliary cathode trace can be connected to the cathode of a pixel in the display region on the two sides of the first isolation region and the second isolation region in the first direction, and the uneven distribution of cathode signals in the display region on the two sides of the first isolation region and the second isolation region in the first direction can be improved.

[0105] In the second direction, the auxiliary cathode trace extends from the display region on the third side of the first isolation region and the second isolation region to the display region on the fourth side of the first isolation region and the second isolation region, and the third side and the fourth side are opposite sides. In this way, the auxiliary cathode trace can be connected to the cathode of a pixel in the display region on the two sides of the first isolation region and the second isolation region in the second direction, and the uneven distribution of cathode signals in the display region on the two sides of the first isolation region and the second isolation region in the second direction can be improved.

[0106] The first direction is perpendicular to the second direction.

[0107] In some embodiments, the display region comprises first, second, and third sub-pixels of different colors; and the auxiliary cathode trace comprises first and second auxiliary traces arranged in layers, or the auxiliary cathode trace comprises first and second auxiliary traces arranged side by side.

[0108] In a direction away from the driving substrate, the first auxiliary trace includes a fourth film layer, a fifth film layer and a sixth film layer which are arranged in a stack, the fourth film layer is made of the same material as the light-emitting functional layer of the first sub-pixel, the fifth film layer is made of the same material as the cathode of the first sub-pixel, and the sixth film layer is made of the same material as the first inorganic encapsulation layer of the first sub-pixel; in this way, the first auxiliary trace can be formed by using the same patterning process as that for forming the light-emitting functional layer, the cathode and the first inorganic encapsulation layer of the first sub-pixel, and the first auxiliary trace does not need to be formed by an additional patterning process, thereby simplifying the manufacturing process of the display panel.

[0109] In a direction away from the driving substrate, the second auxiliary trace includes a seventh film layer, an eighth film layer and a ninth film layer which are arranged in a stack, the seventh film layer is made of the same material as the light-emitting functional layer of the second sub-pixel, the eighth film layer is made of the same material as the cathode of the second sub-pixel, and the ninth film layer is made of the same material as the first inorganic encapsulation layer of the second sub-pixel; in this way, the second auxiliary trace can be formed by using the same patterning process as that for forming the light-emitting functional layer, the cathode and the first inorganic encapsulation layer of the second sub-pixel, and the second auxiliary trace does not need to be formed by an additional patterning process, thereby simplifying the manufacturing process of the display panel.

[0110] In a specific example, the display panel includes green sub-pixels, blue sub-pixels and red sub-pixels, as shown in FIGS. 3 and 4, the first cathode trace S1 can be formed by using the light-emitting functional layer 22, the cathode 23 and the first inorganic encapsulation layer of the red sub-pixel, and the second cathode trace S2 can be formed by using the light-emitting functional layer 32, the cathode 23 and the first inorganic encapsulation layer of the blue sub-pixel; since the light-emitting functional layer 22 and the cathode 23 of the red sub-pixel are sequentially formed by the evaporation process, and the light-emitting functional layer 32 and the cathode 23 of the blue sub-pixel are sequentially formed by the evaporation process, the light-emitting functional layer 22 of the red sub-pixel and the light-emitting functional layer 32 of the blue sub-pixel are also retained in the first isolation region and the second isolation region; in order to avoid the moisture invading the display region along the light-emitting functional layer of the first isolation region and the second isolation region, as shown in FIG. 3, the light-emitting functional layer of the green sub-pixel in the first isolation region and the second isolation region needs to be removed in the region indicated by the arrow, so as to avoid forming a continuous light-emitting functional layer in the first isolation region and the second isolation region.

[0111] As shown in FIG. 4, the first cathode wire S1 is arranged around the opening area, and the first cathode wire S1 extends from the display area AA on the upper side of the first isolation area and the second isolation area to the display area AA on the lower side of the first isolation area and the second isolation area; the first cathode wire S1 also extends from the display area AA on the left side of the first isolation area and the second isolation area to the display area AA on the right side of the first isolation area and the second isolation area; the second cathode wire S2 is arranged around the opening area, and the second cathode wire S2 extends from the display area AA on the upper side of the first isolation area and the second isolation area to the display area AA on the lower side of the first isolation area and the second isolation area; the second cathode wire S2 also extends from the display area AA on the left side of the first isolation area and the second isolation area to the display area AA on the right side of the first isolation area and the second isolation area.

[0112] In another specific example, the display panel includes green sub-pixels, blue sub-pixels and red sub-pixels, as shown in FIG. 5 and FIG. 6, the first cathode wire S1 can be formed by the light-emitting functional layer 33, the cathode 23 and the first inorganic encapsulation layer of the green sub-pixel, and the second cathode wire S2 can be formed by the light-emitting functional layer 32, the cathode 23 and the first inorganic encapsulation layer of the blue sub-pixel, since the light-emitting functional layer 33 of the green sub-pixel and the cathode 23 are sequentially formed by the evaporation process, and the light-emitting functional layer 32 of the blue sub-pixel and the cathode 23 are sequentially formed by the evaporation process, the light-emitting functional layer 33 of the green sub-pixel and the light-emitting functional layer 32 of the blue sub-pixel will be reserved in the first isolation area and the second isolation area, in order to avoid the water vapor invading the display area along the light-emitting functional layer of the first isolation area and the second isolation area, as shown in FIG. 5, the light-emitting functional layer of the red sub-pixel in the first isolation area and the second isolation area needs to be removed in the area indicated by the arrow, so as to avoid forming a continuous light-emitting functional layer in the first isolation area and the second isolation area.

[0113] As shown in FIG. 6, the first cathode wire S1 is arranged around the opening area, and the first cathode wire S1 extends from the display area AA on the upper side of the first isolation area and the second isolation area to the display area AA on the lower side of the first isolation area and the second isolation area; the first cathode wire S1 also extends from the display area AA on the left side of the first isolation area and the second isolation area to the display area AA on the right side of the first isolation area and the second isolation area; the second cathode wire S2 is arranged around the opening area, and the second cathode wire S2 extends from the display area AA on the upper side of the first isolation area and the second isolation area to the display area AA on the lower side of the first isolation area and the second isolation area; the second cathode wire S2 also extends from the display area AA on the left side of the first isolation area and the second isolation area to the display area AA on the right side of the first isolation area and the second isolation area.

[0114] As shown in FIG. 4 and FIG. 6, the first cathode wire S1 and the second cathode wire S2 are arranged side by side, and in some embodiments, the first cathode wire S1 and the second cathode wire S2 can also be arranged in a stacked manner.

[0115] In the embodiment, the first cathode trace S1 is not limited to being formed by the conductive film layer of the red sub-pixel and the green sub-pixel, and the second cathode trace S2 is not limited to being formed by the conductive film layer of the blue sub-pixel. The first cathode trace S1 and the second cathode trace S2 can be respectively formed by the conductive film layer of any two of the blue sub-pixel, the red sub-pixel and the green sub-pixel.

[0116] In some embodiments, in a direction away from the driving substrate, the auxiliary cathode trace includes a first film layer, a second film layer and a third film layer arranged in a stack, the first film layer is made of the same material as the light-emitting functional layer of the sub-pixel of one color in the display area, the second film layer is made of the same material as the cathode of the sub-pixel of the color in the display area, and the second film layer is made of the same material as the first inorganic encapsulation layer of the sub-pixel of the color in the display area. In this way, the auxiliary cathode trace can be formed by using the same patterning process when forming the light-emitting functional layer, the cathode and the first inorganic encapsulation layer of the sub-pixel of the color, without forming the auxiliary cathode trace by an additional patterning process, thereby simplifying the manufacturing process of the display panel.

[0117] In a specific example, the display panel includes green sub-pixels, blue sub-pixels and red sub-pixels, as shown in FIGS. 7 and 8, the auxiliary cathode trace S3 can be formed by the light-emitting functional layer 33, the cathode 23 and the first inorganic encapsulation layer of the green sub-pixel. Since the light-emitting functional layer 33 and the cathode 23 of the green sub-pixel are sequentially formed by the evaporation process, the light-emitting functional layer 33 of the green sub-pixel is retained in the first isolation area and the second isolation area. In order to avoid the invasion of water vapor along the light-emitting functional layer of the first isolation area and the second isolation area into the display area, it is necessary to remove the light-emitting functional layer of the red sub-pixel and the blue sub-pixel in the first isolation area and the second isolation area in the area indicated by the arrow, so as to avoid the formation of a continuous light-emitting functional layer in the first isolation area and the second isolation area.

[0118] As shown in FIG. 8, the auxiliary cathode trace S3 is arranged around the opening area, and extends from the display area AA above the first isolation area and the second isolation area to the display area AA below the first isolation area and the second isolation area. The auxiliary cathode trace S3 also extends from the display area AA on the left side of the first isolation area and the second isolation area to the display area AA on the right side of the first isolation area and the second isolation area. Of course, in the embodiment, the auxiliary cathode trace is not limited to being formed by the light-emitting functional layer, the cathode and the first inorganic encapsulation layer of the green sub-pixel, but can also be formed by the light-emitting functional layer, the cathode and the first inorganic encapsulation layer of the red sub-pixel or the blue sub-pixel.

[0119] In some embodiments, as shown in FIG. 12, in the display area of the display panel, the display panel includes a substrate 01, a first source-drain metal layer 02, a first planarization layer 03, a second source-drain metal layer 04, a second planarization layer 05, a third source-drain metal layer 06, a third planarization layer 07, an inorganic pixel definition layer 08, an anode 09, a fourth source-drain metal layer 10 and an inorganic insulating layer 11 formed on the substrate 01, wherein the inorganic pixel definition layer 08 defines a plurality of sub-pixel areas, the fourth source-drain metal layer 10 and the inorganic insulating layer 11 are formed in an undercut structure on the side of the inorganic pixel definition layer 08 away from the substrate 01, and the light-emitting functional layer and the cathode of the sub-pixel are broken at the undercut structure.

[0120] The display device provided in the embodiments of the present disclosure includes the display panel as described above.

[0121] The display device includes, but is not limited to, a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, a power supply and the like. Those skilled in the art can understand that the structure of the display device described above does not constitute a limitation on the display device, and the display device can include more or fewer components described above, or combine certain components, or different component arrangements. In the embodiments of the present disclosure, the display device includes, but is not limited to, a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device and the like.

[0122] The display device can be a television, a display, a digital photo frame, a mobile phone, a tablet computer and the like any product or component with display function, wherein the display device further includes a flexible circuit board, a printed circuit board and a driving substrate.

[0123] The embodiments of the present disclosure further provide a manufacturing method of a display panel, the display panel including an opening area, a first isolation area, a second isolation area and a display area, the first isolation area being arranged around the opening area, the second isolation area being arranged around the first isolation area, and the display area being arranged around the second isolation area, the manufacturing method of the display panel including:

[0124] forming a driving substrate;

[0125] forming an isolation structure on the driving substrate, the isolation structure being located in the second isolation area and arranged around the first isolation area;

[0126] forming a light-emitting functional layer on the driving substrate, and removing at least part of the light-emitting functional layer of the first isolation area, so that the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation area on the driving substrate;

[0127] forming an encapsulation layer, the encapsulation layer covering the isolation structure.

[0128] In the embodiment, the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate, so that there is no continuous light-emitting functional layer in the first isolation region, a continuous water vapor intrusion path cannot be formed in the first isolation region, water vapor intrusion along the light-emitting functional layer of the first isolation region into the display region can be avoided, GDS defects caused by water vapor intrusion due to exposure of the light-emitting functional layer can be improved, GDS defects in the display region can be avoided, and the display effect of the display panel can be improved.

[0129] In the embodiment, part of the light-emitting functional layer can be reserved in the first isolation region, or the light-emitting functional layer in the first isolation region can be completely removed, so that there is no light-emitting functional layer in the first isolation region, a water vapor intrusion path cannot be formed in the first isolation region, water vapor intrusion along the light-emitting functional layer of the first isolation region into the display region can be avoided, GDS defects caused by water vapor intrusion due to exposure of the light-emitting functional layer can be completely improved, GDS defects in the display region can be avoided, and the display effect of the display panel can be improved.

[0130] In one specific example of the present disclosure, as shown in FIG. 2, in the second isolation region, the display panel includes a driving substrate 21, an inorganic pixel definition layer 41 located on the driving substrate 21, an organic encapsulation layer 25, a second inorganic encapsulation layer 26, and a planarization layer 27; in the first isolation region, the display panel includes the driving substrate 21, the inorganic pixel definition layer 41 located on the driving substrate 21, the second inorganic encapsulation layer 26, and the planarization layer 27, the second inorganic encapsulation layer 26 directly contacts the inorganic pixel definition layer 41, and there is no light-emitting functional layer in the first isolation region, so that a water vapor intrusion path cannot be formed in the first isolation region, and water vapor intrusion along the light-emitting functional layer of the first isolation region into the display region can be avoided. In some embodiments, the inorganic pixel definition layer 41 in the first isolation region can also be removed, so that in the first isolation region, the second inorganic encapsulation layer 26 directly contacts the driving substrate 21, there is no light-emitting functional layer in the first isolation region, a water vapor intrusion path cannot be formed in the first isolation region, and water vapor intrusion along the light-emitting functional layer of the first isolation region into the display region can be avoided.

[0131] In the related art, the isolation column arranged in the first isolation region is to cause the light-emitting functional layer to break in the first isolation region, and when there is no light-emitting functional layer in the first isolation region, the isolation column in the first isolation region also does not need to be formed, and the isolation column in the first isolation region can be removed.

[0132] In some embodiments, the method further includes:

[0133] The light-emitting functional layer of at least part of the second isolation region is removed, so that the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least part of the second isolation region on the driving substrate. In this way, there is no continuous light-emitting functional layer in the second isolation region, and a continuous water vapor intrusion path cannot be formed in the second isolation region, so that water vapor intrusion along the light-emitting functional layer of the second isolation region into the display area can be avoided, and GDS defects caused by water vapor intrusion due to exposure of the light-emitting functional layer can be completely improved.

[0134] In the embodiment, part of the light-emitting functional layer can be retained in the second isolation region, or the light-emitting functional layer of the second isolation region can be completely removed. In this way, there is no light-emitting functional layer in the second isolation region, and a water vapor intrusion path cannot be formed in the second isolation region, so that water vapor intrusion along the light-emitting functional layer of the second isolation region into the display area can be avoided, and GDS defects caused by water vapor intrusion due to exposure of the light-emitting functional layer can be completely improved.

[0135] In the related art, the isolation column arranged in the second isolation region is to cause the light-emitting functional layer to be broken in the second isolation region. When there is no light-emitting functional layer in the second isolation region, there is no need to form an isolation column in the second isolation region, and the isolation column of the second isolation region can be removed.

[0136] In some embodiments, forming the encapsulation layer includes: forming a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer which are sequentially stacked; and the method further includes:

[0137] The first inorganic encapsulation layer of at least part of the first isolation region is removed, so that the orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least part of the first isolation region on the driving substrate. In this way, there is no continuous first inorganic encapsulation layer in the first isolation region, and water vapor intrusion along the crack of the first inorganic encapsulation layer of the first isolation region into the display area can be avoided.

[0138] In the embodiment, part of the first inorganic encapsulation layer can be retained in the first isolation region, or the first inorganic encapsulation layer of the first isolation region can be completely removed. In this way, there is no first inorganic encapsulation layer in the first isolation region, and water vapor cannot intrude into the display area along the crack of the first inorganic encapsulation layer of the first isolation region.

[0139] In some embodiments, the method further includes:

[0140] The first inorganic encapsulation layer of at least part of the second isolation region is removed, so that the orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least part of the second isolation region on the driving substrate. In this way, there is no continuous first inorganic encapsulation layer in the second isolation region, and water vapor intrusion along the crack of the first inorganic encapsulation layer of the second isolation region into the display area can be avoided.

[0141] In this embodiment, part of the first inorganic encapsulation layer in the second isolation area can be reserved, or the first inorganic encapsulation layer in the second isolation area can be completely removed, so that there is no first inorganic encapsulation layer in the second isolation area, and water vapor cannot enter the display area along the cracks of the first inorganic encapsulation layer in the second isolation area.

[0142] As shown in FIGS. 9-12, in the related art, the following steps are performed when preparing a display panel:

[0143] Step 1, as shown in FIG. 9, a substrate 01 is provided, and a first source-drain metal layer 02, a first planar layer 03, a second source-drain metal layer 04, a second planar layer 05, a third source-drain metal layer 06, a third planar layer 07, an inorganic pixel definition layer 08, an anode 09, a fourth source-drain metal layer 10, and an inorganic insulating layer 11 are formed on the substrate 01, wherein the fourth source-drain metal layer 10 and the inorganic insulating layer 11 are formed as an undercut structure;

[0144] Step 2, as shown in FIG. 10, a light-emitting functional layer 14, a cathode 15, and a first inorganic encapsulation layer 12 of a red sub-pixel are formed, the light-emitting functional layer 14, the cathode 15, and the first inorganic encapsulation layer 12 of the red sub-pixel cover the entire area of the display panel, including the display area, the second isolation area, and the first isolation area, and the light-emitting functional layer 14 and the cathode 15 of the red sub-pixel are broken at the undercut structure formed by the fourth source-drain metal layer 10 and the inorganic insulating layer 11;

[0145] Step 3, as shown in FIG. 11, a photoresist 13 covering the area where the red sub-pixel is located is formed;

[0146] Step 4, as shown in FIG. 12, using the photoresist 13 as a mask, the light-emitting functional layer 14, the cathode 15, and the first inorganic encapsulation layer 12 of the red sub-pixel in the area other than the area where the red sub-pixel is located in the display area are removed by over-etching, and then the photoresist is removed, and the boundary of the remaining light-emitting functional layer 14, the cathode 15, and the first inorganic encapsulation layer 12 of the red sub-pixel is the undercut structure formed by the fourth source-drain metal layer 10 and the inorganic insulating layer 11 around the red sub-pixel.

[0147] Using similar steps to steps 1-4, a light-emitting functional layer, a cathode, and a first inorganic encapsulation layer of a green sub-pixel are formed, and the boundary of the light-emitting functional layer, the cathode, and the first inorganic encapsulation layer of the green sub-pixel is the undercut structure formed by the fourth source-drain metal layer 10 and the inorganic insulating layer 11 around the green sub-pixel; using similar steps to steps 1-4, a light-emitting functional layer, a cathode, and a first inorganic encapsulation layer of a blue sub-pixel are formed, and the boundary of the light-emitting functional layer, the cathode, and the first inorganic encapsulation layer of the blue sub-pixel is the undercut structure formed by the fourth source-drain metal layer 10 and the inorganic insulating layer 11 around the blue sub-pixel. Then, an organic encapsulation layer and a second inorganic encapsulation layer are formed.

[0148] In this embodiment, the red sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of at least part of the first isolation area can be removed by over-etching at the same time as the red sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of other areas outside the area where the red sub-pixel is located in the display area are removed; the blue sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of at least part of the first isolation area can be removed by over-etching at the same time as the blue sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of other areas outside the area where the blue sub-pixel is located in the display area are removed; and the green sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of at least part of the first isolation area can be removed by over-etching at the same time as the green sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of other areas outside the area where the green sub-pixel is located in the display area are removed. In this way, the light emitting functional layer of at least part of the first isolation area can be removed, and a continuous water vapor intrusion channel in the first isolation area can be avoided.

[0149] Of course, in this embodiment, the red sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of all the first isolation areas can be removed by over-etching at the same time as the red sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of other areas outside the area where the red sub-pixel is located in the display area are removed; the green sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of all the first isolation areas can be removed by over-etching at the same time as the green sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of other areas outside the area where the green sub-pixel is located in the display area are removed; and the blue sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of all the first isolation areas can be removed by over-etching at the same time as the blue sub-pixel light emitting functional layer, the cathode and the first inorganic encapsulation layer of other areas outside the area where the blue sub-pixel is located in the display area are removed. In this way, in the first isolation area, the light emitting functional layer and the isolation column are completely removed, the inorganic pixel defining layer can be in direct contact with the second inorganic encapsulation layer, and has a good encapsulation effect, and there is no water vapor intrusion path, and the GDS defect caused by water vapor intrusion due to the exposure of the light emitting functional layer is completely improved.

[0150] In some embodiments, the display area includes first, second and third sub-pixels of different colors; and the method specifically includes:

[0151] forming a first light emitting functional layer, a first cathode and a first inorganic encapsulation layer on the driving substrate, the first light emitting functional layer being a light emitting functional layer corresponding to the first sub-pixel;

[0152] forming a photoresist covering the first sub-pixel;

[0153] forming a photoresist covering the second sub-pixel;

[0154] forming a second light-emitting functional layer, a second cathode and a first inorganic encapsulation layer on the driving substrate, the second light-emitting functional layer being a light-emitting functional layer corresponding to the second sub-pixel;

[0155] forming a photoresist covering the second sub-pixel;

[0156] forming a photoresist covering the second sub-pixel;

[0157] forming a third light-emitting functional layer, a third cathode and a first inorganic encapsulation layer on the driving substrate, the third light-emitting functional layer being a light-emitting functional layer corresponding to the third sub-pixel;

[0158] forming a photoresist covering the third sub-pixel;

[0159] forming a photoresist covering the third sub-pixel;

[0160] forming an organic encapsulation layer;

[0161] forming a second inorganic encapsulation layer.

[0162] In this embodiment, the light emitting functional layer, the cathode and the first inorganic encapsulation layer of the first sub-pixel in the regions other than the region where the first sub-pixel is located in the display area are removed by over-etching, and the light emitting functional layer, the cathode and the first inorganic encapsulation layer of the first sub-pixel in all the first isolation regions are removed, and the isolation columns are removed; the light emitting functional layer, the cathode and the first inorganic encapsulation layer of the second sub-pixel in the regions other than the region where the second sub-pixel is located in the display area are removed by over-etching, and the light emitting functional layer, the cathode and the first inorganic encapsulation layer of the second sub-pixel in all the first isolation regions are removed; the light emitting functional layer, the cathode and the first inorganic encapsulation layer of the third sub-pixel in the regions other than the region where the third sub-pixel is located in the display area are removed by over-etching, and the light emitting functional layer, the cathode and the first inorganic encapsulation layer of the third sub-pixel in all the first isolation regions are removed. In this way, in the first isolation region, the light emitting functional layer and the isolation column are completely removed, the inorganic pixel defining layer can be in direct contact with the second inorganic encapsulation layer, and has a good encapsulation effect, and there is no path for water vapor to invade, and the GDS defect caused by water vapor invasion due to exposure of the light emitting functional layer is completely improved.

[0163] The first sub-pixel, the second sub-pixel and the third sub-pixel can be selected from a red sub-pixel, a green sub-pixel and a blue sub-pixel, and for example, the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel and the third sub-pixel is a blue sub-pixel, and the manufacturing method of the embodiment includes the following steps as shown in FIGS. 13-18:

[0164] Step 1, as shown in FIG. 13, a driving substrate 21 is formed, and an inorganic pixel defining layer 41 is formed on the driving substrate 21;

[0165] The driving substrate 21 includes a substrate, a thin film transistor array and signal traces on the substrate, and can further include an anode of a pixel.

[0166] Step 2, as shown in FIG. 14, a light emitting functional layer 22, a cathode 23 and a first inorganic encapsulation layer 24 of a red sub-pixel are formed on the driving substrate 21;

[0167] Step 3, a photoresist covering the red sub-pixel in the display area is formed, and the light emitting functional layer 22, the cathode 23 and the first inorganic encapsulation layer 24 outside the region where the red sub-pixel is located in the display area are removed with the photoresist as a mask, as shown in FIG. 15, the light emitting functional layer 22, the cathode 23 and the first inorganic encapsulation layer 24 in the second isolation region and the first isolation region are removed;

[0168] Step 4, as shown in FIG. 16, a light emitting functional layer 32, a cathode 23 and a first inorganic encapsulation layer 24 of a blue sub-pixel are formed on the driving substrate 21;

[0169] Step 5, photoresist covering the blue sub-pixel in the display area is formed, and the light-emitting functional layer 32, the cathode 23 and the first inorganic encapsulation layer 24 outside the area where the blue sub-pixel in the display area is located are removed as a mask of the photoresist, as shown in FIG. 17, the light-emitting functional layer 32, the cathode 23 and the first inorganic encapsulation layer 24 in the second isolation area and the first isolation area are removed;

[0170] Step 6, as shown in FIG. 18, the light-emitting functional layer 33, the cathode 23 and the first inorganic encapsulation layer 24 of the green sub-pixel are formed on the driving substrate 21;

[0171] Step 7, photoresist covering the green sub-pixel in the display area is formed, and the light-emitting functional layer 33, the cathode 23 and the first inorganic encapsulation layer 24 outside the area where the green sub-pixel in the display area is located are removed as a mask of the photoresist, as shown in FIG. 19, the light-emitting functional layer 33, the cathode 23 and the first inorganic encapsulation layer 24 in the second isolation area and the first isolation area are removed;

[0172] Step 8, as shown in FIG. 2, the organic encapsulation layer 25, the second inorganic encapsulation layer 26 and the planarization layer 27 are formed.

[0173] The boundary of the organic encapsulation layer 25 is the isolation structure 28, in the first isolation area, the second inorganic encapsulation layer 26 is in direct contact with the inorganic pixel boundary layer 41, there is no light-emitting functional layer in the first isolation area, and the water vapor intrusion path cannot be formed in the first isolation area, which can avoid the water vapor intrusion along the light-emitting functional layer in the first isolation area to the display area, completely improve the GDS defect caused by the water vapor intrusion due to the exposure of the light-emitting functional layer, avoid causing the GDS defect in the display area, and improve the display effect of the display panel.

[0174] In the embodiment, the cathodes of the blue sub-pixel, the red sub-pixel and the green sub-pixel adopt the same material, and therefore the same reference sign 23 represents the cathodes of the blue sub-pixel, the red sub-pixel and the green sub-pixel. Of course, the cathodes of the blue sub-pixel, the red sub-pixel and the green sub-pixel can also adopt different materials.

[0175] In the related art, due to the existence of the first isolation area, the cathode signal distribution of the display area around the first isolation area is uneven, and in order to solve this problem, in some embodiments, the method further comprises:

[0176] An auxiliary cathode trace is formed in the first isolation area and the second isolation area, and the auxiliary cathode trace is connected with the cathode of the pixel in the display area, so that the problem of uneven cathode signal distribution of the display area can be improved through the auxiliary cathode trace, and the display effect of the display panel is improved.

[0177] In some embodiments, the display region includes first, second and third sub-pixels with different colors; the auxiliary cathode wire includes first and second auxiliary wires arranged in a stack, or the auxiliary cathode wire includes first and second auxiliary wires arranged side by side; forming the auxiliary cathode wire includes:

[0178] The light-emitting functional layer, the cathode, the first inorganic encapsulation layer and the first auxiliary wire of the first sub-pixel are formed through one patterning process, so that the first auxiliary wire is formed without an additional patterning process, and the manufacturing process of the display panel is simplified.

[0179] The light-emitting functional layer, the cathode, the first inorganic encapsulation layer and the second auxiliary wire of the second sub-pixel are formed through one patterning process, so that the second auxiliary wire is formed without an additional patterning process, and the manufacturing process of the display panel is simplified.

[0180] In a specific example, the display panel includes green, blue and red sub-pixels, as shown in FIGS. 3 and 4, the first cathode wire S1 can be formed using the light-emitting functional layer 22, the cathode 23 and the first inorganic encapsulation layer of the red sub-pixel, and the second cathode wire S2 can be formed using the light-emitting functional layer 32, the cathode 23 and the first inorganic encapsulation layer of the blue sub-pixel. Since the light-emitting functional layer 22 and the cathode 23 of the red sub-pixel are sequentially formed through an evaporation process, and the light-emitting functional layer 32 and the cathode 23 of the blue sub-pixel are sequentially formed through an evaporation process, the light-emitting functional layer 22 of the red sub-pixel and the light-emitting functional layer 32 of the blue sub-pixel are also retained in the first and second isolation regions. In order to prevent water vapor from invading the display region along the light-emitting functional layer of the first isolation region, as shown in FIG. 3, the light-emitting functional layer of the green sub-pixel in the first and second isolation regions in the region indicated by the arrow needs to be removed to avoid forming a continuous light-emitting functional layer in the first and second isolation regions.

[0181] As shown in FIG. 4, the first cathode wire S1 is arranged around the opening region, and extends from the display region AA above the first and second isolation regions to the display region AA below the first and second isolation regions; the first cathode wire S1 also extends from the display region AA on the left side of the first and second isolation regions to the display region AA on the right side of the first and second isolation regions; the second cathode wire S2 is arranged around the opening region, and extends from the display region AA above the first and second isolation regions to the display region AA below the first and second isolation regions; the second cathode wire S2 also extends from the display region AA on the left side of the first and second isolation regions to the display region AA on the right side of the first and second isolation regions.

[0182] In another specific example, the display panel includes green sub-pixels, blue sub-pixels, and red sub-pixels, as shown in FIG. 5 and FIG. 6, the first cathode wire S1 can be formed by the light-emitting functional layer 33, the cathode 23, and the first inorganic encapsulation layer of the green sub-pixel, and the second cathode wire S2 can be formed by the light-emitting functional layer 32, the cathode 23, and the first inorganic encapsulation layer of the blue sub-pixel. Since the light-emitting functional layer 33 of the green sub-pixel and the cathode 23 are sequentially formed by the evaporation process, and the light-emitting functional layer 32 of the blue sub-pixel and the cathode 23 are sequentially formed by the evaporation process, the light-emitting functional layer 33 of the green sub-pixel and the light-emitting functional layer 32 of the blue sub-pixel will be reserved in the first isolation area and the second isolation area. In order to avoid the invasion of water vapor along the light-emitting functional layer of the first isolation area and the second isolation area into the display area, as shown in FIG. 5, the light-emitting functional layer of the red sub-pixel in the first isolation area and the second isolation area needs to be removed in the area indicated by the arrow, so as to avoid the formation of a continuous light-emitting functional layer in the first isolation area and the second isolation area.

[0183] As shown in FIG. 6, the first cathode wire S1 is arranged around the opening area, and the first cathode wire S1 extends from the display area AA on the upper side of the first isolation area and the second isolation area to the display area AA on the lower side of the first isolation area and the second isolation area; the first cathode wire S1 also extends from the display area AA on the left side of the first isolation area and the second isolation area to the display area AA on the right side of the first isolation area and the second isolation area; the second cathode wire S2 is arranged around the opening area, and the second cathode wire S2 extends from the display area AA on the upper side of the first isolation area and the second isolation area to the display area AA on the lower side of the first isolation area and the second isolation area; the second cathode wire S2 also extends from the display area AA on the left side of the first isolation area and the second isolation area to the display area AA on the right side of the first isolation area and the second isolation area.

[0184] As shown in FIG. 4 and FIG. 6, the first cathode wire S1 and the second cathode wire S2 are arranged side by side, and in some embodiments, the first cathode wire S1 and the second cathode wire S2 can also be arranged in a stacked manner.

[0185] In the present embodiment, the first cathode wire S1 is not limited to being formed by the cathode of the red sub-pixel and the green sub-pixel, and the second cathode wire S2 is not limited to being formed by the cathode of the blue sub-pixel. The cathode of any two sub-pixels among the blue sub-pixel, the red sub-pixel, and the green sub-pixel can be used to form the first cathode wire S1 and the second cathode wire S2, respectively.

[0186] In some embodiments, forming the auxiliary cathode wire includes:

[0187] The light-emitting functional layer, the cathode, the first inorganic encapsulation layer and the auxiliary cathode trace of the sub-pixel of one color of the display area are formed by one patterning process, so that the auxiliary cathode trace can be formed without an additional patterning process, and the manufacturing process of the display panel can be simplified.

[0188] In one specific example, the display panel includes green sub-pixels, blue sub-pixels and red sub-pixels, as shown in FIGS. 7 and 8, the auxiliary cathode trace S3 can be formed by the light-emitting functional layer 33, the cathode 23 and the first inorganic encapsulation layer of the green sub-pixel. Since the light-emitting functional layer 33 and the cathode 23 of the green sub-pixel are sequentially formed by the evaporation process, the light-emitting functional layer 33 of the green sub-pixel is retained in the first isolation area and the second isolation area. In order to avoid the invasion of water vapor along the light-emitting functional layer of the first isolation area and the second isolation area into the display area, the light-emitting functional layer of the red sub-pixel and the blue sub-pixel in the first isolation area and the second isolation area needs to be removed in the area indicated by the arrow, so as to avoid the formation of a continuous light-emitting functional layer in the first isolation area and the second isolation area.

[0189] As shown in FIG. 8, the auxiliary cathode trace S3 is arranged around the opening area, and extends from the display area AA above the first isolation area and the second isolation area to the display area AA below the first isolation area and the second isolation area. The auxiliary cathode trace S3 also extends from the display area AA on the left side of the first isolation area and the second isolation area to the display area AA on the right side of the first isolation area and the second isolation area. Of course, in the present embodiment, the cathode of the green sub-pixel is not limited to forming the auxiliary cathode trace, and the cathode of the red sub-pixel or the blue sub-pixel can also be used to form the auxiliary cathode trace.

[0190] In the method embodiments of the present disclosure, the serial numbers of the steps cannot be used to limit the sequence of the steps, and for those skilled in the art, the changes in the sequence of the steps without creative labor are also within the protection scope of the present disclosure.

[0191] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each of the embodiments focuses on the differences from other embodiments. In particular, for the embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the description of the product embodiments.

[0192] The above merely describes the specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A display panel, characterized in that, The display panel includes an opening area, a first isolation area, a second isolation area, and a display area. The first isolation area surrounds the opening area, the second isolation area surrounds the first isolation area, and the display area surrounds the second isolation area. The display panel includes: Drive substrate; An isolation structure is disposed on one side of the driving substrate, located in the second isolation region, and surrounding the first isolation region; A light-emitting functional layer is disposed on the side of the isolation structure away from the driving substrate; An encapsulation layer is disposed on the side of the light-emitting functional layer away from the driving substrate and covers the isolation structure; Wherein, the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least a portion of the first isolation region on the driving substrate.

2. The display panel according to claim 1, characterized in that, The display panel further includes a cathode layer located on the side of the light-emitting functional layer away from the driving substrate, wherein the orthographic projection of the cathode layer on the driving substrate does not overlap with the orthographic projection of at least a portion of the first isolation area on the driving substrate.

3. The display panel according to claim 1, characterized in that, The orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least a portion of the second isolation region on the driving substrate.

4. The display panel according to claim 1 or 3, characterized in that, Along a direction away from the driving substrate, the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked sequentially. Wherein, the orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least a portion of the first isolation region on the driving substrate.

5. The display panel according to claim 4, characterized in that, The orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least a portion of the second isolation region on the driving substrate.

6. The display panel according to claim 4, characterized in that, The display panel includes an inorganic pixel defining layer located between the driving substrate and the light-emitting functional layer; In the first isolation region, the second inorganic encapsulation layer is in direct contact with the inorganic pixel defining layer; or, the second inorganic encapsulation layer is in direct contact with the driving substrate.

7. The display panel according to claim 1, characterized in that, The display panel also includes: The auxiliary cathode traces are located in the first isolation area and the second isolation area, and the auxiliary cathode traces are connected to the cathodes of the pixels in the display area.

8. The display panel according to claim 7, characterized in that, In a first direction, the auxiliary cathode trace extends from the display area on the first side of the first isolation region and the second isolation region to the display area on the second side of the first isolation region and the second isolation region, wherein the first side and the second side are opposite sides; In the second direction, the auxiliary cathode trace extends from the display area on the third side of the first isolation region and the second isolation region to the display area on the fourth side of the first isolation region and the second isolation region, wherein the third side and the fourth side are opposite sides; Wherein, the first direction is perpendicular to the second direction.

9. The display panel according to claim 7, characterized in that, Along a direction away from the driving substrate, the auxiliary cathode trace includes a first film layer, a second film layer, and a third film layer stacked together. The first film layer uses the same material as the light-emitting functional layer of a sub-pixel of a certain color in the display area. The second film layer uses the same material as the cathode of the sub-pixel of that color in the display area. The second film layer uses the same material as the first inorganic encapsulation layer of the sub-pixel of that color in the display area.

10. The display panel according to claim 7, characterized in that, The display area includes a first subpixel, a second subpixel, and a third subpixel of different colors; the auxiliary cathode trace includes a first auxiliary trace and a second auxiliary trace stacked together, or the auxiliary cathode trace includes a first auxiliary trace and a second auxiliary trace arranged side by side. Along the direction away from the driving substrate, the first auxiliary trace includes a fourth film layer, a fifth film layer and a sixth film layer stacked together. The fourth film layer is made of the same material as the light-emitting functional layer of the first sub-pixel, the fifth film layer is made of the same material as the cathode of the first sub-pixel, and the sixth film layer is made of the same material as the first inorganic encapsulation layer of the first sub-pixel. Along a direction away from the driving substrate, the second auxiliary trace includes a seventh film layer, an eighth film layer, and a ninth film layer stacked together. The seventh film layer uses the same material as the light-emitting functional layer of the second sub-pixel, the eighth film layer uses the same material as the cathode of the second sub-pixel, and the ninth film layer uses the same material as the first inorganic encapsulation layer of the second sub-pixel.

11. The display panel according to claim 1, characterized in that, The display area includes a pixel defining layer and a plurality of sub-pixels defined by the pixel defining layer. The pixel defining layer has an undercut structure on the side away from the driving substrate, and the light-emitting functional layer and cathode of the sub-pixel are broken at the undercut structure.

12. The display panel according to claim 11, characterized in that, The undercut structure includes a fourth source / drain metal layer and an inorganic insulating layer stacked together. The fourth source / drain metal layer is located between the inorganic insulating layer and the pixel defining layer. The orthographic projection of the fourth source / drain metal layer on the driving substrate is located within the orthographic projection of the inorganic insulating layer on the driving substrate.

13. A display device, characterized in that, Includes the display panel as described in any one of claims 1-12.

14. A method for manufacturing a display panel, characterized in that, The display panel includes an opening area, a first isolation area, a second isolation area, and a display area. The first isolation area is disposed around the opening area, the second isolation area is disposed around the first isolation area, and the display area is disposed around the second isolation area. The method for manufacturing the display panel includes: Forming a driving substrate; An isolation structure is formed on the driving substrate, located in the second isolation region and surrounding the first isolation region; A light-emitting functional layer is formed on the driving substrate, and at least a portion of the light-emitting functional layer of the first isolation region is removed, such that the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least a portion of the first isolation region on the driving substrate; An encapsulation layer is formed, which covers the isolation structure.

15. The method for manufacturing a display panel according to claim 14, characterized in that, The method further includes: Remove at least a portion of the light-emitting functional layer of the second isolation region such that the orthographic projection of the light-emitting functional layer on the driving substrate does not overlap with the orthographic projection of at least a portion of the second isolation region on the driving substrate.

16. The method for manufacturing a display panel according to claim 14 or 15, characterized in that, Forming the encapsulation layer includes: forming a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked sequentially; the method further includes: Remove at least a portion of the first inorganic encapsulation layer of the first isolation region such that the orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least a portion of the first isolation region on the driving substrate.

17. The method for manufacturing a display panel according to claim 16, characterized in that, The method further includes: Remove at least a portion of the first inorganic encapsulation layer of the second isolation region such that the orthographic projection of the first inorganic encapsulation layer on the driving substrate does not overlap with the orthographic projection of at least a portion of the second isolation region on the driving substrate.

18. The method for manufacturing a display panel according to claim 16, characterized in that, The display area includes a first sub-pixel, a second sub-pixel, and a third sub-pixel of different colors; the method specifically includes: A first light-emitting functional layer, a first cathode, and a first inorganic encapsulation layer are formed on the driving substrate, wherein the first light-emitting functional layer is the light-emitting functional layer corresponding to the first sub-pixel; Forming a photoresist covering the first subpixel; Using the photoresist as a mask, the first light-emitting functional layer, the first cathode, and the first inorganic encapsulation layer in the regions where the second sub-pixel and the third sub-pixel are located are removed, while at least a portion of the first light-emitting functional layer, the first cathode, and the first inorganic encapsulation layer in the first isolation region are also removed. A second light-emitting functional layer, a second cathode, and a first inorganic encapsulation layer are formed on the driving substrate, wherein the second light-emitting functional layer is the light-emitting functional layer corresponding to the second sub-pixel; Forming a photoresist covering the second subpixel; Using the photoresist as a mask, the second light-emitting functional layer, the second cathode, and the first inorganic encapsulation layer in the regions where the first sub-pixel and the third sub-pixel are located are removed, while at least a portion of the second light-emitting functional layer, the second cathode, and the first inorganic encapsulation layer in the first isolation region are also removed. A third light-emitting functional layer, a third cathode, and a first inorganic encapsulation layer are formed on the driving substrate, wherein the third light-emitting functional layer is the light-emitting functional layer corresponding to the third sub-pixel; Forming a photoresist covering the third subpixel; Using the photoresist as a mask, the third light-emitting functional layer, the third cathode, and the first inorganic encapsulation layer in the regions where the first sub-pixel and the second sub-pixel are located are removed, while at least a portion of the third light-emitting functional layer, the third cathode, and the first inorganic encapsulation layer in the first isolation region are also removed. Form an organic encapsulation layer; A second inorganic encapsulation layer is formed.

19. The method for manufacturing a display panel according to claim 14, characterized in that, The method further includes: Auxiliary cathode traces are formed in the first isolation region and the second isolation region, and the auxiliary cathode traces are connected to the cathodes of the pixels in the display area.

20. The method for manufacturing a display panel according to claim 19, characterized in that, Forming the auxiliary cathode trace includes: The display area is formed in a single patterning process by creating a light-emitting functional layer, a cathode, a first inorganic encapsulation layer, and auxiliary cathode traces of a subpixel of one color.

21. The method for manufacturing a display panel according to claim 19, characterized in that, The display area includes a first subpixel, a second subpixel, and a third subpixel of different colors; the auxiliary cathode trace includes a first auxiliary trace and a second auxiliary trace stacked together, or the auxiliary cathode trace includes a first auxiliary trace and a second auxiliary trace arranged side by side. Forming the auxiliary cathode trace includes: The first sub-pixel's light-emitting functional layer, cathode, first inorganic encapsulation layer, and first auxiliary trace are formed through a single patterning process. The second subpixel's light-emitting functional layer, cathode, first inorganic encapsulation layer, and second auxiliary trace are formed through a single patterning process.

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