Display panel, display device and preparation method of display panel

Abstract

The invention discloses a display panel, a display device and a preparation method of the display panel, relates to the technical field of display, and can improve display abnormity caused by poor cathode connection of the display panel prepared by a non-refined mask process and improve the display effect. A display panel includes: a substrate layer; the plurality of light emitting devices are arranged on one side of the substrate layer; the light-emitting device comprises a first electrode, a light-emitting layer and a second electrode, wherein the light-emitting layer is arranged between the first electrode and the second electrode; a plurality of auxiliary electrodes, wherein the second electrode is electrically connected with at least one auxiliary electrode; and the auxiliary signal line is electrically connected with the at least two auxiliary electrodes.

Description

Technical Field

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

[0002] With the continuous development of display technology, the application of OLED (Organic light-Emitting Diode) display panels is becoming more and more widespread. The mainstream method for mass production of OLED panels is the vacuum evaporation process. The FMM (Fine Metal Mask) can be used to realize the graphical evaporation of different color luminescent materials on the display panel. The graphic fineness of the FMM will directly affect the resolution, display effect and production yield of the OLED display panel. Due to the limitation of the graphical accuracy of the FMM, the improvement of the display panel resolution is limited. Therefore, in order to further improve the resolution of the display panel, a non-FMM process can be used to prepare the light-emitting device. However, the existing non-FMM process is prone to poor connection of the cathode, resulting in abnormal display of the display panel. Summary of the invention

[0003] The embodiments of the present application provide a display panel, a display device and a method for manufacturing a display panel, which can improve display anomalies caused by poor cathode connection of a display panel manufactured without an FMM process and improve display effects.

[0004] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0005] substrate layer;

[0006] A plurality of light emitting devices are arranged on one side of the substrate layer;

[0007] The light emitting device comprises a first electrode, a light emitting layer and a second electrode, wherein the light emitting layer is arranged between the first electrode and the second electrode;

[0008] a plurality of auxiliary electrodes, wherein the second electrode is electrically connected to at least one of the auxiliary electrodes;

[0009] The auxiliary signal line is electrically connected to at least two of the auxiliary electrodes.

[0010] In some embodiments, the orthographic projection of the auxiliary electrode on the substrate layer at least partially surrounds the orthographic projection of the second electrode on the substrate layer; and / or,

[0011] The orthographic projection of the auxiliary electrode on the substrate layer at least partially surrounds the orthographic projection of the first electrode on the substrate layer; and / or,

[0012] The orthographic projection of the auxiliary electrode on the substrate layer does not overlap with the orthographic projection of the second electrode on the substrate layer; and / or,

[0013] The orthographic projection of the auxiliary electrode on the substrate layer has no overlap with the orthographic projection of the first electrode on the substrate layer, or the orthographic projection of the auxiliary electrode on the substrate layer partially overlaps with the orthographic projection of the first electrode on the substrate layer.

[0014] In some embodiments, the display panel further includes:

[0015] A plurality of pixel units arranged in an array, wherein the pixel units include a plurality of the light-emitting devices;

[0016] The auxiliary electrodes corresponding to the pixel units in the same row are electrically connected to the same auxiliary signal line; and / or,

[0017] The auxiliary electrodes corresponding to the pixel units in the same column are electrically connected to the same auxiliary signal line; and / or,

[0018] The auxiliary electrodes corresponding to the light emitting devices in the same row are electrically connected to the same auxiliary signal line; and / or,

[0019] The auxiliary electrodes corresponding to the light emitting devices in the same column are electrically connected to the same auxiliary signal line;

[0020] The direction of the rows intersects with the direction of the columns.

[0021] In some embodiments, the auxiliary signal line is disposed between the pixel units in adjacent rows, and / or, the auxiliary signal line is disposed between the pixel units in adjacent columns; and / or,

[0022] The auxiliary signal line is disposed between the light emitting devices in adjacent rows, and / or the auxiliary signal line is disposed between the light emitting devices in adjacent columns.

[0023] In some embodiments, the display panel further includes:

[0024] A pixel defining layer, wherein the pixel defining layer and the light emitting device are arranged on the same side of the substrate layer;

[0025] The pixel defining layer comprises a pixel opening and a first groove, wherein the pixel opening is used to expose at least a portion of the first electrode;

[0026] The notch of the first groove is located at a side of the pixel defining layer away from the substrate layer, and the first groove is located between adjacent pixel openings;

[0027] The light emitting layer is disposed at the pixel opening, and the second electrode is electrically connected to the auxiliary electrode through the first groove.

[0028] In some embodiments, the first groove is used to break the light-emitting layer at the edge of the first groove;

[0029] The first groove is used to electrically connect at least a portion of the side wall of the auxiliary electrode in the thickness direction to the second electrode, and the thickness direction is a direction perpendicular to the plane where the substrate layer is located.

[0030] In some embodiments, the pixel defining layer includes a via hole, the via hole penetrates the pixel defining layer in a thickness direction, the via hole is located between the first groove and the pixel opening, and the auxiliary electrode is electrically connected to the auxiliary signal line through the via hole.

[0031] In some embodiments, at least a portion of an end surface of the auxiliary electrode close to the first groove is connected to at least a portion of an end surface of the first groove close to the auxiliary electrode.

[0032] In some embodiments, at least a portion of an end surface of the auxiliary electrode close to the first groove is flush with at least a portion of an end surface of the first groove close to the auxiliary electrode.

[0033] In some embodiments, the distance between the surface of the auxiliary electrode away from the substrate layer and the substrate layer is a first distance, the distance between the bottom of the first groove and the substrate layer is a second distance, and the first distance is greater than the second distance.

[0034] In some embodiments, the difference between the second distance and the first distance is a third distance, the depth of the first groove in the thickness direction of the pixel defining layer is a fourth distance, and the third distance is greater than the fourth distance.

[0035] In some embodiments, the display panel further includes:

[0036] A driving layer, disposed between the substrate layer and the light-emitting device, the driving layer comprising a pixel driving circuit, and the pixel driving circuit is electrically connected to the first electrode of the light-emitting device;

[0037] The pixel driving circuit comprises a plurality of conductive layers, and the auxiliary signal line is arranged in the same layer as at least one of the conductive layers; and / or,

[0038] The auxiliary signal line is arranged in the same layer as the first electrode.

[0039] In some embodiments, the display panel further includes:

[0040] A pixel defining layer, wherein the pixel defining layer and the light emitting device are arranged on the same side of the substrate layer;

[0041] The pixel defining layer comprises a pixel opening and a via hole, wherein the pixel opening and the via hole penetrate the pixel defining layer in a thickness direction, wherein the thickness direction is a direction perpendicular to the plane where the substrate layer is located, and the via hole is located between adjacent pixel openings;

[0042] The light emitting layer is disposed at the pixel opening, and the auxiliary electrode is electrically connected to the auxiliary signal line through the via hole;

[0043] The pixel opening includes a first opening and a second opening, the first opening is connected with the second opening to form the pixel opening, and the first opening is farther away from the substrate layer than the second opening;

[0044] The inner diameter of the first opening is greater than the inner diameter of the second opening, and a step structure is formed at the junction of the inner wall of the first opening and the inner wall of the second opening;

[0045] One end of the auxiliary electrode close to the pixel opening is connected to the step structure, and the second electrode is connected to one end of the auxiliary electrode close to the pixel opening.

[0046] In some embodiments, the auxiliary electrode is disposed at one end close to the pixel opening on at least a portion of an inner wall of the first opening, and the second electrode is connected to the auxiliary electrode on the inner wall of the first opening.

[0047] In some embodiments, the second electrodes of two adjacent light-emitting devices are electrically connected to the auxiliary signal line between the two adjacent light-emitting devices, the direction in which one of the two adjacent light-emitting devices points to the other is a first direction, and the connection line of the via holes corresponding to the auxiliary electrodes connected to the two adjacent light-emitting devices extends along a second direction, and the first direction is parallel to the second direction; and / or,

[0048] The second electrode of the light-emitting device is correspondingly connected to at least two of the via holes.

[0049] In some embodiments, the display panel further includes:

[0050] A partition layer is provided on a side of the pixel defining layer away from the substrate layer, the partition layer is used to break the light emitting layer at the edge of the partition layer, and the partition layer is used to break the second electrode at the edge of the partition layer;

[0051] The orthographic projection of the partition layer on the substrate layer surrounds the orthographic projection of the pixel opening on the substrate layer.

[0052] In some embodiments, when the pixel defining layer includes the first groove and the via hole, the via hole is located between the isolation layer and the first groove.

[0053] In some embodiments, the orthographic projection of the isolation layer on the substrate layer at least partially surrounds the orthographic projection of the first groove on the substrate layer; and / or,

[0054] The orthographic projection of the partition layer on the substrate layer at least partially surrounds the orthographic projection of the via hole on the substrate layer.

[0055] In some embodiments, when the pixel defining layer includes the via hole, at least two via holes are disposed between two adjacent pixel openings;

[0056] At least two of the via holes between two adjacent pixel openings are connected to the same auxiliary signal line; and / or,

[0057] At least two of the via holes between two adjacent pixel openings are connected to different auxiliary electrodes, the area between at least two of the via holes between two adjacent pixel openings is a first area, the first area includes a first sub-area, an edge of the first area does not overlap with an edge of the first sub-area, an orthographic projection of the partition layer on the substrate layer does not overlap with an orthographic projection of the first sub-area on the substrate layer, and an orthographic projection of the auxiliary signal line on the substrate layer covers an orthographic projection of the first sub-area on the substrate layer; or,

[0058] At least two of the via holes between two adjacent pixel openings are connected to the same auxiliary electrode.

[0059] In some embodiments, the area between the adjacent pixel openings is a second area, the second area includes a second sub-area, an edge of the second area does not overlap with an edge of the second sub-area, and an orthographic projection of the second sub-area on the substrate layer does not overlap with an orthographic projection of the via on the substrate layer;

[0060] An orthographic projection of the partition layer on the substrate layer has no overlap with an orthographic projection of the second sub-region on the substrate layer.

[0061] In some embodiments, in the thickness direction, the thickness of the isolation layer is greater than the groove depth of the first groove;

[0062] The orthographic projection of the partition layer on the substrate layer does not overlap with the orthographic projection of the auxiliary electrode on the substrate layer, or the orthographic projection of the partition layer on the substrate layer partially overlaps with the orthographic projection of the auxiliary electrode on the substrate layer.

[0063] In some embodiments, the distance between the surface of the auxiliary electrode away from the substrate layer and the substrate layer is a first distance, the distance between the surface of the partition layer away from the substrate layer and the substrate layer is a fifth distance, and the fifth distance is greater than the first distance.

[0064] In some embodiments, in the direction in which the pixel opening points to the first groove, the diameter of the first groove at an end away from the substrate layer is smaller than the diameter of the first groove at an end close to the substrate layer; and / or,

[0065] In the direction in which the pixel opening points to the partition layer, a dimension of an end of the partition layer away from the substrate layer is larger than a dimension of an end of the partition layer close to the substrate layer.

[0066] In some embodiments, at least a portion of the sidewall of the isolation layer in the thickness direction includes a protruding structure, and the protruding structure is arranged at an end of the sidewall of the isolation layer away from the substrate layer, and / or the protruding structure is arranged at an end of the sidewall of the isolation layer close to the substrate layer.

[0067] In some embodiments, at least a portion of the sidewall of the isolation layer in the thickness direction includes a first sidewall segment and a second sidewall segment, and the first sidewall segment is farther away from the substrate layer than the second sidewall segment;

[0068] The orthographic projection of the side surface of the partition layer corresponding to the first side wall segment on the substrate layer is a first projection, and the orthographic projection of the side surface of the partition layer corresponding to the second side wall segment on the substrate layer is a second projection, and the first projection surrounds the second projection.

[0069] In some embodiments, the sidewall of the isolation layer further includes a third sidewall segment, the second sidewall segment is located between the first sidewall segment and the third sidewall segment, and the third sidewall segment is closer to the substrate layer than the second sidewall segment;

[0070] The orthographic projection of the side surface of the isolation layer corresponding to the third side wall segment on the substrate layer is a third projection, and the first projection surrounds the third projection.

[0071] In some embodiments, at least two of the first sidewall segment, the second sidewall segment, and the third sidewall segment are located on a sidewall of the partition layer away from the pixel opening.

[0072] In some embodiments, the pixel definition layer further includes a second groove, and the second groove is disposed between the pixel opening and the isolation layer;

[0073] The notch of the second groove is located at a side of the pixel defining layer away from the substrate layer, and the inner wall of the second groove is connected to the side wall of the partition layer in the thickness direction.

[0074] In some embodiments, the inner wall of the second groove is coplanar with the side wall of the isolation layer in the thickness direction; and / or,

[0075] The ratio of the groove depth of the second groove in the thickness direction to the thickness of the pixel defining layer is in a range of 1 / 10 to 1 / 4; and / or,

[0076] The depth of the second groove in the thickness direction is in the range of 0.1 to 0.5 micrometers; and / or,

[0077] The dimension of the second groove in the direction from the partition layer to the pixel opening is a first dimension, and the first dimension is greater than or equal to the step difference of the side wall of the partition layer in the thickness direction.

[0078] In some embodiments, a third groove is provided on a side of the isolation layer away from the substrate layer;

[0079] In the direction of a line connecting two adjacent pixel openings, an inner diameter of an end of the third groove away from the substrate layer is smaller than an inner diameter of an end of the third groove close to the substrate layer.

[0080] In some embodiments, the display panel further includes:

[0081] a pixel defining layer, wherein the pixel defining layer and the light emitting device are arranged on the same side of the substrate layer, the pixel defining layer comprises a pixel opening and a fourth groove, the notch of the fourth groove is located on a side of the pixel defining layer away from the substrate layer, the light emitting layer is arranged at the pixel opening, and the fourth groove is arranged between adjacent pixel openings;

[0082] The partition layer is arranged on a side of the pixel defining layer away from the substrate layer, and the partition layer comprises a third opening, the third opening penetrates the partition layer, and the orthographic projection of the third opening on the substrate layer covers the orthographic projection of the fourth groove on the substrate layer.

[0083] In some embodiments, a side of the isolation layer close to the substrate layer is connected to the auxiliary electrode.

[0084] In some embodiments, the display panel further includes:

[0085] An encapsulation layer, disposed on a side of the second electrode away from the substrate layer;

[0086] The encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, the organic encapsulation layer is located between the first inorganic encapsulation layer and the second inorganic encapsulation layer, the first inorganic encapsulation layer is located between the second electrode and the organic encapsulation layer, and the thickness of the first inorganic encapsulation layer and the second inorganic encapsulation layer is less than the thickness of the organic encapsulation layer;

[0087] The first inorganic encapsulation layer is disposed in the first groove; and / or,

[0088] The first inorganic encapsulation layer is disposed in the second groove; and / or,

[0089] The second sidewall segment is connected to the first inorganic layer.

[0090] In some embodiments, the light-emitting device further comprises a plurality of light-emitting auxiliary layers, at least one of which is disposed on a side of the light-emitting layer away from the substrate layer, and / or at least one of which is disposed on a side of the light-emitting layer close to the substrate layer;

[0091] The minimum distance between the edge of at least one effective light-emitting auxiliary layer and the auxiliary electrode is a sixth distance, the minimum distance between the edge of the effective light-emitting layer and the auxiliary electrode is a seventh distance, and the sixth distance is greater than the seventh distance;

[0092] The effective luminescent auxiliary layer is the luminescent auxiliary layer used to assist the luminescent layer in luminescence, and the effective luminescent layer is the luminescent layer used for luminescence.

[0093] In some embodiments, the light-emitting auxiliary layer includes an electron transport layer, an electron generation layer, an electron blocking layer, a hole transport layer, a hole injection layer and a hole blocking layer; and / or,

[0094] The auxiliary electrode includes at least one of titanium, aluminum, molybdenum, copper, indium tin oxide and silver; and / or,

[0095] The auxiliary signal line includes at least one of titanium, aluminum, molybdenum, copper, indium tin oxide and silver; and / or,

[0096] The light-emitting layer includes a red light-emitting layer, a blue light-emitting layer and a green light-emitting layer.

[0097] According to a second aspect of an embodiment of the present application, a display device is provided, including:

[0098] A display panel as described in the first aspect.

[0099] According to a third aspect of the embodiments of the present application, there is provided a method for preparing a display panel, which is used to prepare the display panel according to the first aspect, and the method comprises:

[0100] Auxiliary signal lines, a plurality of light emitting devices and a plurality of auxiliary electrodes are respectively arranged on one side of the substrate layer;

[0101] The light-emitting device comprises a first electrode, a light-emitting layer and a second electrode, the light-emitting layer is arranged between the first electrode and the second electrode, the second electrode is electrically connected to at least one auxiliary electrode, and the auxiliary signal line is electrically connected to at least two auxiliary electrodes.

[0102] In some embodiments, the light-emitting layer includes a first light-emitting layer, a second light-emitting layer and a third light-emitting layer, the first light-emitting layer, the second light-emitting layer and the third light-emitting layer are respectively used to emit light of different colors, and the regions where the first light-emitting layer, the second light-emitting layer and the third light-emitting layer are located are respectively the third region, the fourth region and the fifth region;

[0103] The plurality of light emitting devices are arranged on one side of the substrate layer, comprising:

[0104] Disposing a plurality of the first electrodes on one side of the substrate layer;

[0105] Disposing a pixel defining layer on a side of the first electrode away from the substrate layer;

[0106] Etching a side of the pixel definition layer away from the substrate layer to obtain a plurality of pixel openings, wherein the pixel openings are used to expose at least a portion of the first electrode;

[0107] Disposing the first light-emitting layer on a side of the pixel defining layer away from the substrate layer, so that the first light-emitting layer is electrically connected to the first electrode exposed by the pixel opening;

[0108] The second electrode is disposed on a side of the first light-emitting layer away from the substrate layer, and the second electrode is electrically connected to the first light-emitting layer to form the light-emitting device in the third area;

[0109] Disposing a packaging layer on a side of the second electrode away from the substrate layer;

[0110] removing the encapsulation layer, the second electrode and the first light-emitting layer in the fourth region and the fifth region;

[0111] Disposing the second light-emitting layer on a side of the pixel defining layer away from the substrate layer, so that the second light-emitting layer is electrically connected to the first electrode exposed by the pixel opening;

[0112] The second electrode is disposed on a side of the second light-emitting layer away from the substrate layer, and the second electrode is electrically connected to the second light-emitting layer to form the light-emitting device in the fourth area;

[0113] Disposing a packaging layer on a side of the second electrode away from the substrate layer;

[0114] removing the encapsulation layer, the second electrode and the second light-emitting layer in the third region and the fifth region;

[0115] The third light-emitting layer is disposed on a side of the pixel defining layer away from the substrate layer, so that the third light-emitting layer is electrically connected to the first electrode exposed by the pixel opening;

[0116] The second electrode is disposed on a side of the third light-emitting layer away from the substrate layer, and the second electrode is electrically connected to the third light-emitting layer to form the light-emitting device in the fifth area;

[0117] Disposing a packaging layer on a side of the second electrode away from the substrate layer;

[0118] The encapsulation layer, the second electrode, and the third light emitting layer in the third region and the fourth region are removed.

[0119] In some implementations, setting the auxiliary signal line includes:

[0120] Before arranging the plurality of the first electrodes on one side of the substrate layer, arranging the auxiliary signal line on one side of the substrate layer;

[0121] and / or,

[0122] Disposing a first electrode layer on one side of the substrate layer;

[0123] Etching the first electrode layer to obtain a plurality of the first electrodes and the auxiliary signal lines;

[0124] and / or,

[0125] A driving layer is arranged between the substrate layer and the light-emitting device, and the driving layer includes a pixel driving circuit. In the case where the pixel driving circuit includes multiple conductive layers, multiple conductive layers are arranged on one side of the substrate layer, and the conductive layers are etched to obtain the pixel driving circuit and the auxiliary signal line.

[0126] In some embodiments, etching a side of the pixel defining layer away from the substrate layer includes:

[0127] Etching a side of the pixel definition layer away from the substrate layer to obtain a plurality of pixel openings and a plurality of via holes, wherein the via holes are located between adjacent pixel openings;

[0128] Before providing the light-emitting layer, the method further comprises:

[0129] An auxiliary electrode is disposed on a side of the pixel defining layer away from the substrate layer, so that the auxiliary electrode is electrically connected to the auxiliary signal line through the via hole;

[0130] A partition layer is disposed on a side of the pixel defining layer away from the substrate layer, wherein an orthographic projection of the partition layer on the substrate layer does not overlap with an orthographic projection of the pixel opening on the substrate layer.

[0131] In some embodiments, before or after providing the auxiliary electrode, the method further includes:

[0132] Etching a side of the pixel definition layer away from the substrate layer to obtain a plurality of first grooves, wherein the via holes are located between the first grooves and the pixel openings;

[0133] The light-emitting layer is provided, comprising:

[0134] The light-emitting layer is disposed on a side of the pixel defining layer away from the substrate layer, so that the light-emitting layer is electrically connected to the first electrode exposed by the pixel opening, and the light-emitting layer is broken at the edge of the first groove and the edge of the isolation layer;

[0135] The second electrode is provided, comprising:

[0136] The second electrode is disposed on a side of the light emitting layer away from the substrate layer, so that the second electrode is electrically connected to the auxiliary electrode through the first groove, and the second electrode is broken at an edge of the isolation layer.

[0137] In some embodiments, etching a side of the pixel defining layer away from the substrate layer includes:

[0138] Etching a side of the pixel definition layer away from the substrate layer to obtain a plurality of first openings and a plurality of second openings, wherein the first openings are connected with the second openings to form the pixel openings, the first openings are away from the substrate layer relative to the second openings, the inner diameter of the first openings is greater than the inner diameter of the second openings, and a step structure is formed at the junction of the inner wall of the first opening and the inner wall of the second opening;

[0139] The auxiliary electrode is provided, comprising:

[0140] The auxiliary electrode is arranged on a side of the pixel defining layer away from the substrate layer, so that the auxiliary electrode is electrically connected to the auxiliary signal line through the via hole, and one end of the auxiliary electrode close to the pixel opening is connected to the step structure;

[0141] Providing the second electrode comprises:

[0142] The second electrode is disposed on a side of the light emitting layer away from the substrate layer, so that the second electrode is connected to an end of the auxiliary electrode close to the pixel opening, and the second electrode is broken at an edge of the isolation layer.

[0143] In some embodiments, providing the barrier layer comprises:

[0144] Disposing a partition film on a side of the pixel defining layer away from the substrate layer;

[0145] Etching the partition film to obtain the partition layer, wherein at least part of the sidewall of the partition layer in the thickness direction includes a first sidewall segment and a second sidewall segment, the first sidewall segment is farther away from the substrate layer than the second sidewall segment, the orthographic projection of the side surface of the partition layer corresponding to the first sidewall segment on the substrate layer is a first projection, the orthographic projection of the side surface of the partition layer corresponding to the second sidewall segment on the substrate layer is a second projection, and the first projection surrounds the second projection;

[0146] or,

[0147] The partition film is etched to obtain the partition layer, wherein a third groove is provided on a side of the partition layer away from the substrate layer, and in the direction of a line connecting two adjacent pixel openings, an inner diameter of an end of the third groove away from the substrate layer is smaller than an inner diameter of an end of the third groove close to the substrate layer.

[0148] In some embodiments, etching the partition film to obtain the partition layer includes:

[0149] Etching the partition film to obtain the partition layer, wherein the sidewall of the partition layer further includes a third sidewall segment, the second sidewall segment is located between the first sidewall segment and the third sidewall segment, and the third sidewall segment is closer to the substrate layer than the second sidewall segment;

[0150] The orthographic projection of the side surface of the partition layer corresponding to the third side wall segment on the substrate layer is a third projection, and the first projection surrounds the third projection;

[0151] At least two of the first sidewall segment, the second sidewall segment, and the third sidewall segment are located on a sidewall of the partition layer away from the pixel opening.

[0152] In some embodiments, etching the side of the pixel defining layer away from the substrate layer further comprises:

[0153] A side of the pixel definition layer away from the substrate layer is etched to obtain a second groove, wherein the second groove is arranged between the pixel opening and the isolation layer, and an inner wall of the second groove is connected to a side wall of the isolation layer in a thickness direction.

[0154] In some embodiments, etching the side of the pixel defining layer away from the substrate layer further comprises:

[0155] Etching a side of the pixel definition layer away from the substrate layer to obtain a fourth groove, wherein the fourth groove is arranged between adjacent pixel openings;

[0156] Providing the isolation layer includes:

[0157] Disposing a partition film on a side of the pixel defining layer away from the substrate layer;

[0158] The isolation film is etched to obtain the isolation layer, wherein the isolation layer comprises a third opening, the third opening penetrates the isolation layer, and the orthographic projection of the third opening on the substrate layer covers the orthographic projection of the fourth groove on the substrate layer.

[0159] The display panel provided in the embodiment of the present application electrically connects the second electrode through the auxiliary electrode by setting an auxiliary electrode and an auxiliary signal line, and the auxiliary signal line can provide a second drive signal for the second electrode. On the one hand, all auxiliary signal lines can be connected to the same second drive signal, and the setting of the auxiliary signal line and the auxiliary electrode is equivalent to a parallel resistor, which can reduce the path impedance of the second electrode, reduce the IR Drop (voltage drop) on the second electrode, and improve the display effect. On the other hand, the auxiliary signal line provides the second drive signal to the second electrode, which can ensure that the second electrode receives the required second drive signal, avoiding the display abnormality problem caused by the second electrode set in the entire layer breaking along with the light-emitting layer breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0160] Figure 1 A schematic partial cross-sectional structure diagram of a display panel provided in an embodiment of the present application;

[0161] Figure 2 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0162] Figure 3 A schematic cross-sectional structure diagram of a display panel along line A1-A2 provided in an embodiment of the present application;

[0163] Figure 4 A schematic cross-sectional structural diagram of another display panel along line A1-A2 provided in an embodiment of the present application;

[0164] Figure 5 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0165] Figure 6 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0166] Figure 7 A schematic cross-sectional structure diagram of another display panel along line A1-A2 provided in an embodiment of the present application;

[0167] Figure 8 A schematic cross-sectional structural diagram of another display panel along line A1-A2 provided in an embodiment of the present application;

[0168] Fig. 9 A schematic cross-sectional structure diagram of a display panel along line A1-A2 provided in an embodiment of the present application;

[0169] Fig.10 A schematic cross-sectional structural diagram of another display panel along line A1-A2 provided in an embodiment of the present application;

[0170] Fig.11 A schematic cross-sectional structure diagram of another display panel along line A1-A2 provided in an embodiment of the present application;

[0171] Fig.12 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0172] Fig.13 A schematic cross-sectional structural diagram of a display panel along line B1-B2 provided in an embodiment of the present application;

[0173] Fig.14 A schematic cross-sectional structural diagram of another display panel along line B1-B2 provided in an embodiment of the present application;

[0174] Fig.15 A schematic cross-sectional structural diagram of another display panel along line B1-B2 provided in an embodiment of the present application;

[0175] Fig.16 A schematic cross-sectional structural diagram of another display panel along line B1-B2 provided in an embodiment of the present application;

[0176] Fig.17 A schematic cross-sectional structural diagram of a display panel along line B1-B2 provided in an embodiment of the present application;

[0177] Fig.18 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0178] Fig.19A schematic cross-sectional structure diagram of a display panel along line C1-C2 provided in an embodiment of the present application;

[0179] Fig. 20 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0180] Fig.21 A schematic cross-sectional structural diagram of another display panel along line C1-C2 provided in an embodiment of the present application;

[0181] Fig. 22 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0182] Fig.23 A schematic cross-sectional structure diagram of another display panel along line C1-C2 provided in an embodiment of the present application;

[0183] Fig.24 A schematic cross-sectional structural diagram of another display panel along line C1-C2 provided in an embodiment of the present application;

[0184] Fig.25 A schematic cross-sectional structure diagram of a display panel along line C1-C2 provided in an embodiment of the present application;

[0185] Fig.26 A schematic cross-sectional structural diagram of another display panel along line C1-C2 provided in an embodiment of the present application;

[0186] Fig. 27 A schematic cross-sectional structure diagram of another display panel along line C1-C2 provided in an embodiment of the present application;

[0187] Fig.28 A schematic cross-sectional structural diagram of another display panel along line C1-C2 provided in an embodiment of the present application;

[0188] Fig.29 A schematic cross-sectional structure diagram of a display panel along line C1-C2 provided in an embodiment of the present application;

[0189] Fig.30 A schematic structural diagram of a display device provided in an embodiment of the present application;

[0190] Fig.31 A schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application;

[0191] Fig.32 A schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0192] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0193] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0194] With the continuous development of display technology, the application of OLED display panels is becoming more and more extensive. The mainstream method for mass production of OLED panels is the vacuum evaporation process. FMM can be used to realize the graphic evaporation of different color luminescent materials on the display panel. The graphic fineness of FMM will directly affect the resolution, display effect and production yield of the OLED display panel. Due to the limitation of the graphic accuracy of FMM, the improvement of the display panel resolution is limited. Therefore, in order to further improve the resolution of the display panel, the light-emitting device can be prepared by the FMM-free process. However, the existing FMM-free process is prone to poor cathode connection, resulting in abnormal display of the display panel.

[0195] In view of this, the embodiments of the present application provide a display panel, a display device and a method for manufacturing a display panel, which can improve display abnormalities caused by poor cathode connection of a display panel manufactured without an FMM process and improve display effects.

[0196] According to a first aspect of an embodiment of the present application, a display panel is provided. Figure 1 This is a schematic partial cross-sectional structure diagram of a display panel provided in an embodiment of the present application. Figure 1As shown, it includes: a substrate layer 100, a plurality of light-emitting devices 200, a plurality of auxiliary electrodes 300 and an auxiliary signal line 400; illustratively, the substrate layer 100 may be a hard substrate, such as glass; the substrate layer 100 may also be a flexible substrate, such as polyimide. A plurality of light-emitting devices 200 are arranged on one side of the substrate layer 100; the plurality of light-emitting devices 200 may be arranged in an array, and the light-emitting device includes a first electrode 210, a light-emitting layer 220 and a second electrode 230, and the light-emitting layer 220 is arranged between the first electrode 210 and the second electrode 230; the light-emitting layer 220 may emit light under the drive of the first electrode 210 and the second electrode 230, and the first electrode 210 and the second electrode 230 may receive a driving signal respectively. The second electrode 230 is electrically connected to at least one auxiliary electrode 300, and the second electrodes 230 of different light-emitting devices 200 may be independent of each other, and each second electrode 230 may be connected to at least one auxiliary electrode 300. The auxiliary signal line 400 is electrically connected to at least two auxiliary electrodes 300. The number of auxiliary signal lines 400 on the display panel can be one or more, and is not specifically limited. The auxiliary signal line 400 is used to provide the second driving signal of the second electrode 230 to the auxiliary electrode 300. The auxiliary electrode 300 can transmit the received second driving signal to the second electrode 230 to drive the light-emitting layer 220 to emit light. The first electrode 210 can receive the first driving signal. The first driving signal and the second driving signal can be voltage signals. The light-emitting layer 220 emits light under the action of the first driving signal and the second driving signal, and the emitted light can be used for displaying the picture of the display panel. Exemplarily, a light-emitting device 200 can be used as a sub-pixel of a display panel, and light-emitting devices that emit light of different colors can form a pixel unit, and the pixel units are repeatedly arranged in the display panel.

[0197] Exemplarily, the first electrode 210 can be one of the anode and the cathode, and the second electrode 230 can be the other of the anode and the cathode; when the first electrode 210 is the anode and the second electrode 230 is the cathode, the first drive signal is the anode signal and the second drive signal is the cathode signal. This is merely exemplary and is not specifically limited in the embodiments of the present application.

[0198] It should be noted that Figure 1 is a schematic diagram of the cross-sectional structure of a light emitting device 200 in the display panel in the thickness direction H of the display panel, Figure 1 The light emitting device 200 shown can be of any color, and the thickness direction H of the display panel is also a direction perpendicular to the plane where the substrate layer 100 is located, and is also the thickness direction of the substrate layer 100 .

[0199] For example, Figure 1As shown, the light emitting layer 220 is broken at the edge of the auxiliary electrode 300 , and the second electrode 230 is connected to the side wall of the auxiliary electrode 300 in the thickness direction H, so that the auxiliary electrode 300 and the second electrode 230 can be electrically connected.

[0200] For example, Figure 1 As shown, the auxiliary signal line 400 is arranged in the same layer as the first electrode 210. The auxiliary signal line 400 and the first electrode 210 can be realized by etching the same conductive layer to obtain a pattern. Therefore, the arrangement of the auxiliary signal line 400 does not need to increase the process flow and will not cause an increase in production costs.

[0201] It should be noted that FMM can usually be used to realize the graphic evaporation of different color luminescent materials on the display panel. The graphic hollowing on the FMM can pass the luminescent material to the display panel during the evaporation process to form a graphic luminescent material. The graphic fineness of the FMM will directly affect the resolution, display effect and production yield of the OLED display panel. FMM is a fine metal mask, usually a thin layer of metal. The metal can be Invar (low expansion alloy), and Invar can be a nickel-iron alloy, also known as Invar alloy. The thickness of FMM can be within 100 microns, and the corresponding hollowing can be set according to the needs of the evaporation material pattern. FMM is consumable and expensive, and there is also a lot of waste of evaporation materials in the evaporation process. Since the process accuracy of the hollowing of FMM will directly affect the arrangement setting of the evaporation material pattern of the display panel, that is, it affects the resolution of the display panel, the PPI (Pixels Per Inch) of the display panel prepared by FMM is usually around 400, which is difficult to further increase. Therefore, the preparation of evaporation material patterns without FMM process is a major development trend of OLED display panels. Light-emitting devices are prepared without the FMM process, and light-emitting materials of different colors are prepared separately. The light-emitting materials outside the target area can be removed by etching or other methods, and light-emitting devices of corresponding colors can be obtained in the target area. There is no need to use FMM, which can shorten the distance between adjacent light-emitting devices and improve the PPI of the display panel.

[0202] It should be noted that pixel interference of different colors can be separated by isolating the light-emitting layers of light-emitting devices of different colors. However, when isolating the light-emitting layers, the cathode will also be responded to and isolated due to its front setting, affecting the cathode drive and causing display abnormalities.

[0203] The display panel provided in the embodiment of the present application is provided with an auxiliary electrode 300 and an auxiliary signal line 400, and the second electrode 230 is electrically connected through the auxiliary electrode 300, and the auxiliary signal line 400 can provide a second driving signal for the second electrode 230. On the one hand, all the auxiliary signal lines 400 can be connected to the same second driving signal, and the setting of the auxiliary signal line 400 and the auxiliary electrode 300 is equivalent to a parallel resistor, which can reduce the path impedance of the second electrode 230, reduce the IRDrop on the second electrode 230, and improve the display effect. On the other hand, the auxiliary signal line 400 provides the second driving signal to the second electrode 230, which can ensure that the second electrode 230 receives the required second driving signal, and avoids the display abnormality problem caused by the second electrode 230 set in the whole layer breaking along with the light-emitting layer 220.

[0204] In some embodiments, the display panel further includes a pixel defining layer and a driving layer, the pixel defining layer is provided with a plurality of pixel openings, the pixel openings can be used to define the area where the light-emitting device is located, and the pixel openings can be used to expose at least a portion of the first electrode 210, so that the first electrode 210 exposed by the pixel opening is electrically connected to the light-emitting layer 220. The driving layer can be used to provide a driving signal to the first electrode 210 and the second electrode 230, the driving layer can include multiple conductive layers, and the auxiliary signal line 400 can be provided in the same layer as any conductive layer. The driving layer can include a driving device, such as a driving transistor, and the driving layer can also include any signal line, such as a gate signal line, a data signal line, etc.

[0205] For example, Figure 2 A schematic partial structural diagram of another display panel provided in an embodiment of the present application; Figure 3 A schematic cross-sectional structure diagram of a display panel along A1-A2 provided in an embodiment of the present application. Figure 2 and Figure 3 , Figure 2 and Figure 3 The display panel is only partially illustrated. The display panel includes a pixel defining layer 500 and a driving layer 600. The driving layer 600 is disposed between the substrate layer 100 and the light emitting device, that is, the driving layer 600 is disposed between the substrate layer 100 and the first electrode 210. The pixel defining layer 500 is disposed on a side of the driving layer 600 away from the substrate layer 100. The pixel defining layer 500 includes a plurality of pixel openings 501. Figure 2 The light emitting device 200 may include a red light emitting device, a blue light emitting device and a green light emitting device. The red light emitting device may correspond to a red pixel opening r1, the blue light emitting device may correspond to a blue pixel opening b1, and the green light emitting device may correspond to a green pixel opening g1. Figure 3The pixel opening 501 can be used to expose a portion of the first electrode 210, and the first electrode 210 exposed by the pixel opening 501 can be used to be electrically connected to the light-emitting layer. It should be noted that a light-emitting auxiliary layer, such as a hole injection layer, a hole transport layer, and an electron blocking layer, can also be provided between the first electrode 210 and the light-emitting layer 220.

[0206] Exemplarily, the driving layer 600 may include a pixel driving circuit, which is electrically connected to the first electrode 210 of the light emitting device 200; the pixel driving circuit may include multiple transistors, for example, the pixel driving circuit may be a circuit structure such as 2T1C, 7T1C or 9T1C, where T represents TFT (thin film transistor), C represents capacitance, and the value represents the number of devices. The pixel driving circuit may include a driving transistor 610, and the source or drain of the driving transistor is electrically connected to the first electrode 210.

[0207] Exemplary, reference Figure 3 The driving transistor 610 includes a gate 511, an active layer 612 and a source-drain electrode 613. The source-drain electrode 613 includes a source and a drain. The source and the drain can be insulated from each other in the same layer. Figure 3 The driving transistor 610 shown is a bottom gate structure, that is, the gate 611 is located on a side of the active layer 612 away from the source-drain electrode 613 .

[0208] Exemplary, reference Figure 3 , the first electrode 210 can be prepared before the pixel definition layer 500. Figure 2 and Figure 3 , the orthographic projection of the pixel opening 501 on the substrate layer 100 falls within the orthographic projection of the first electrode 210 on the substrate layer 100. Figure 2 As shown, the dotted line surrounding the pixel opening 501 is the electrode edge 211 of the first electrode 210 , and the dotted circle indicates the first electrode via hole 601 , through which the first electrode 210 and the driving transistor 610 can pass.

[0209] Exemplary, reference Figure 2 , the dashed line box indicates the auxiliary signal line 400 , and the orthographic projection of the auxiliary electrode 300 on the substrate layer 100 at least partially overlaps with the orthographic projection of the auxiliary signal line 400 on the substrate layer 100 .

[0210] For example, Figure 2As shown, the red light-emitting device corresponding to the red pixel opening r1, the green light-emitting device corresponding to the green pixel opening g1, and the blue light-emitting device corresponding to the blue pixel opening b1 can form a pixel unit 101, and the display panel can include a plurality of pixel units 101 arranged in an array, and the pixel unit 101 can include a plurality of light-emitting devices. The auxiliary signal line 400 is arranged between the pixel units 101 in adjacent rows, and the row direction X intersects with the column direction Y. The adjacent blue pixel openings b1 are separated by green pixel openings g1 in the row direction X, and the adjacent red pixel openings r1 are separated by blue pixel openings b1 in the row direction X. The auxiliary electrodes 300 corresponding to the adjacent green pixel openings g1 and red pixel openings r1 in the column direction Y can be connected to the same auxiliary signal line 400. The orthographic projections of all the first electrode vias 601 in the pixel unit 101 on the substrate layer 100 can all fall into the virtual frame of the pixel unit 101.

[0211] It should be noted that Figure 2 The red pixel opening r1 , the blue pixel opening b1 , and the green pixel opening g1 in the pixel unit 101 are arranged in a “P” shape. Figure 2 The shape and arrangement of the pixel opening 501 shown are only for illustration and are not intended to be a specific limitation of the present application.

[0212] It should be noted that the light emitting period in the pixel unit 101 may be arranged in rows and columns, which is not specifically limited in the embodiment of the present application.

[0213] In some embodiments, the pixel driving circuit may include multiple conductive layers, and the auxiliary signal line 400 is disposed in the same layer as at least one conductive layer. It should be noted that the same-layer arrangement means that the two structures are formed simultaneously through the same patterning process, and the thickness of the film layer is the size of the film layer in the thickness direction H. The auxiliary signal line 400 is disposed in the same layer as the conductive layer to avoid an increase in the process flow caused by the arrangement of the auxiliary signal line 400, thereby avoiding an increase in production costs.

[0214] Exemplary, reference Figure 1 , the auxiliary signal line 400 is disposed in the same layer as the first electrode 210 .

[0215] Exemplary, reference Figure 3 The pixel driving circuit includes a conductive layer where the gate electrode 611 is located and a conductive layer where the source-drain electrode 613 is located, and the auxiliary signal line 400 is arranged on the same layer as the source-drain electrode 613 .

[0216] It should be noted that if Figure 3As shown, the driving layer 600 includes multiple insulating layers, an insulating layer is arranged between the gate 611 and the active layer 6121, an insulating layer can be arranged between the source and drain electrodes 613 and the first electrode 210, and an insulating layer can be arranged between the gate 611 and the substrate layer 100. The driving layer 600 may include insulating layers of various materials, and the insulating layers may include silicon nitride, silicon oxide or organic materials, etc.

[0217] For example, Figure 4 This is a schematic cross-sectional structure diagram of another display panel along A1-A2 provided in an embodiment of the present application. Figure 4 As shown, the driving transistor 610 includes a gate 611, an active layer 612, a source-drain electrode 613, a gate signal line 614 and a connecting electrode 615. The gate signal line 614 can be used to transmit a gate signal, and the connecting electrode 615 can be used to connect the source-drain electrode 613 and the first electrode 210. The gate 611 is located on the side of the active layer 612 away from the substrate layer 100, and the driving transistor 610 is a top gate structure. The auxiliary signal line 400 is arranged in the same layer as the gate signal line 614, and the auxiliary signal line 400 and the auxiliary electrode 300 can be connected through an auxiliary connecting structure 401, and the auxiliary connecting structure 401 can be arranged in the same layer as the connecting electrode 615.

[0218] Exemplary, reference Figure 2 The auxiliary electrode 300 is disposed at one side of the pixel opening 501 , and the auxiliary electrode 300 may be located between pixel units 101 in adjacent rows.

[0219] In some embodiments, the orthographic projection of the auxiliary electrode 300 on the substrate layer 100 at least partially surrounds the orthographic projection of the first electrode 210 on the substrate layer. Figure 5 This is a schematic partial structural diagram of another display panel provided in an embodiment of the present application. Figure 5 As shown, the orthographic projection of the auxiliary electrode 300 on the substrate layer 100 partially surrounds the orthographic projection of the first electrode 210 on the substrate layer 100. The auxiliary electrode 300 partially surrounds the first electrode 210, which can enhance the electrical connection stability between the auxiliary electrode 210 and the second electrode 230.

[0220] In some examples, reference Figure 1 and Figure 5 The auxiliary signal lines 400 may be arranged between adjacent rows of pixel units 101. For example, the auxiliary signal lines 400 are distributed in parallel in the column direction Y, and the auxiliary signal lines 400 are alternately arranged with the pixel unit rows. The pixel unit row may be a row of pixel units or multiple rows of pixel units.

[0221] In some examples, the auxiliary signal lines 400 may also be arranged between adjacent columns of pixel units 101. For example, the auxiliary signal lines 400 are arranged in parallel in the row direction X, and the auxiliary signal lines 400 are arranged alternately with the pixel unit columns, and the pixel unit columns may be one column of pixel units or multiple columns of pixel units.

[0222] In some examples, the auxiliary signal lines 400 are disposed between adjacent rows of light emitting devices 200. For example, the auxiliary signal lines 400 are distributed in the column direction Y, and the auxiliary signal lines 400 are alternately disposed with sub-pixel rows, the light emitting devices and the pixel driving circuits may constitute sub-pixels, and the sub-pixel rows may be a row of sub-pixels or a plurality of rows of sub-pixels.

[0223] In some examples, the auxiliary signal lines 400 are disposed between adjacent columns of light emitting devices 200. For example, the auxiliary signal lines 400 are distributed in the row direction X, and the auxiliary signal lines 400 are alternately disposed with sub-pixel columns, which may be one column of sub-pixels or multiple columns of sub-pixels.

[0224] Exemplarily, the row direction and the column direction may be perpendicular to each other, that is, the row direction X and the column direction Y are perpendicular to each other.

[0225] In some embodiments, the pixel defining layer 500 may further include a first groove and a via hole, wherein the notch of the first groove is located on the side of the pixel defining layer 500 away from the substrate layer 100, and the first groove is located between adjacent pixel openings 501; the first groove is located between the pixel opening and the via hole, and the via hole penetrates the pixel defining layer 500 in the thickness direction H, and the auxiliary electrode 300 may penetrate the via hole, and the end of the auxiliary electrode 300 away from the substrate layer 100 is connected to the second electrode, and the end of the auxiliary electrode 300 close to the substrate layer 100 is connected to the auxiliary signal line 400. If the light emitting layer 220 is broken at the edge of the auxiliary electrode 300, and the light emitting layer 220 is broken at the edge of the first groove, then the auxiliary electrode 300 and the first groove can both play the role of isolating the light emitting layer 220 so that the second electrode 230 is connected to the auxiliary electrode 300 at the position where the light emitting layer 220 is broken, thereby achieving electrical connection.

[0226] In some examples, the break of the light-emitting layer 220 at the edge of the auxiliary electrode 300 can expose at least a portion of the sidewall of the auxiliary electrode 300 in the thickness direction H, so that the second electrode 230 can be connected to at least a portion of the sidewall of the auxiliary electrode 300 in the thickness direction H. It should be noted that the second electrode 230 can be disconnected or continuously connected at the edge of the first groove; the second electrode 230 can be disconnected or continuously at the edge of the auxiliary electrode 300, as long as the electrical connection between the second electrode 230 and the auxiliary electrode 300 can be achieved.

[0227] In some embodiments, the display panel may further include a partition layer, and the via hole may be located between the first groove and the partition layer. The partition layer is used to partition the light-emitting layer 220 and the second electrode 230, that is, the light-emitting layer 220 and the second electrode 230 may be broken at the edge of the partition layer to achieve the partition of the film layer. The provision of the partition layer can disconnect the light-emitting layers 220 of different light-emitting devices 200 in a process without FMM, and can avoid the light leakage caused by the connection between the light-emitting layers 220 of different light-emitting devices 200. The light leakage of the light-emitting layers of adjacent light-emitting devices 200 may cause pixel light mixing and reduced color purity.

[0228] In some examples, Figure 6 A schematic partial structural diagram of another display panel provided in an embodiment of the present application; Figure 7 A cross-sectional structure diagram of another display panel along line A1-A2 provided in an embodiment of the present application. Figure 6 and Figure 7 , the pixel defining layer 500 includes a pixel opening 501, a first groove 502 and a via hole 503, and the display panel further includes a partition layer 700, which is disposed on a side of the pixel defining layer 500 away from the substrate layer 100. The via hole 503 penetrates the pixel defining layer 500 in the thickness direction H, the pixel opening 501 penetrates the pixel defining layer 500 in the thickness direction H, and the first groove 502 is disposed on a side of the pixel defining layer 500 away from the substrate layer 100, that is, the notch of the first groove 502 is located on a side of the pixel defining layer 500 away from the substrate layer 100. The first groove 502 and the via hole 503 are both disposed between the pixel opening 501 and the partition layer 700, and the via hole 503 is located between the first groove 502 and the partition layer 700. Part of the structure of the auxiliary electrode 300 in the thickness direction H is filled in the via 503 to achieve connection between the auxiliary electrode 300 and the auxiliary signal line 400 through the via 503. The end of the auxiliary electrode 300 away from the substrate layer 100 is laid on the side of the pixel defining layer 500 away from the substrate layer 100 to achieve connection with the second electrode 230.

[0229] Exemplary, reference Figure 6 The partition layer 700 covers the other regions except the pixel opening 501, the first groove 502 and the auxiliary electrode 300, and the partition layer 700 can play a better role in isolating the light-emitting layer.

[0230] In some embodiments, the auxiliary electrodes 300 correspondingly connected to the pixel units 101 in the same row are electrically connected to the same auxiliary signal line 400 , that is, the second electrodes 230 of the pixel units 101 in the same row are correspondingly connected to the same auxiliary signal line 400 .

[0231] In some embodiments, the auxiliary electrodes 300 correspondingly connected to the pixel units 101 in the same column are electrically connected to the same auxiliary signal line 400. The second electrodes 230 of the pixel units 101 in the same column are correspondingly connected to the same auxiliary signal line 400.

[0232] In some embodiments, the auxiliary electrodes 300 correspondingly connected to the light emitting devices 200 in the same row are electrically connected to the same auxiliary signal line 400; the second electrodes 230 of the light emitting devices 200 in the same row are correspondingly connected to the same auxiliary signal line 400.

[0233] In some embodiments, the auxiliary electrodes 300 correspondingly connected to the light emitting devices 200 in the same column are electrically connected to the same auxiliary signal line 400; the second electrodes 230 of the light emitting devices 200 in the same column are correspondingly connected to the same auxiliary signal line 400.

[0234] Exemplary, reference Figure 6 The auxiliary signal line 400 is arranged between the pixel units 101 in adjacent rows, and the second electrodes of the light emitting devices on both sides of the auxiliary signal line 400 in the column direction Y are connected to the auxiliary signal line 400. According to the arrangement of the light emitting devices in the pixel unit 101, the blue light emitting device and the red light emitting device in one pixel unit 101 can be connected to the same auxiliary signal line 400. Figure 6 It is only for illustration and is not intended to be a specific limitation of the embodiments of the present application.

[0235] It should be noted that the connection method between the second electrode and the auxiliary signal line can be set according to the specific arrangement method of the light-emitting device and the auxiliary signal line.

[0236] In some embodiments, in the direction in which the pixel opening 501 points to the first groove 502, the diameter of the first groove 502 at the end away from the substrate layer 100 is smaller than the diameter of the first groove 502 at the end close to the substrate layer 100; in the direction in which the pixel opening 501 points to the isolation layer 700, the size of the isolation layer 700 at the end away from the substrate layer 100 is larger than the size of the isolation layer 700 at the end close to the substrate layer 100.

[0237] Exemplary, reference Figure 7, the direction from the pixel opening 501 to the first groove 502 is the reference direction L, and the direction from the pixel opening 501 to the partition layer 700 is also the reference direction L. Since the pixel opening 501 is a closed shape, the reference direction L is not unique. In the reference direction L, the diameter of the first groove 502 at the end away from the substrate layer 100 is the first diameter L1, and the diameter of the first groove 502 at the end close to the substrate layer 100 is the second diameter L2. The first diameter L1 is smaller than the second diameter L2. The first groove 502 is wide at the top and wide at the bottom, so that the edge of the first groove 502 is partitioned by the light-emitting layer 220. The dimension of the partition layer 700 at the end away from the substrate layer 100 is the third outer diameter L3, and the dimension of the partition layer 700 at the end close to the substrate layer 100 is the fourth outer diameter L4. The third outer diameter L3 is larger than the fourth outer diameter L4. The partition layer 700 is wide at the top and narrow at the bottom, so that the light-emitting layer 220 can be better partitioned to achieve light isolation between light-emitting devices.

[0238] In some embodiments, Figure 8 A cross-sectional structure diagram of another display panel along A1-A2 provided in an embodiment of the present application. Figure 8 The distance between the surface of the auxiliary electrode 300 away from the substrate layer 100 and the substrate layer 100 is a first distance H1, and the distance between the bottom of the first groove 502 and the substrate layer 100 is a second distance H2. The first distance H1 is greater than the second distance H2, that is, the upper surface of the auxiliary electrode 300 exceeds the notch of the first groove 502, which can ensure the isolation effect between the edge of the auxiliary electrode 300 and the edge of the first groove 502.

[0239] In some examples, reference Figure 7 and Figure 8 , the orthographic projection of the partition layer 700 on the substrate layer 100 surrounds the orthographic projection of the pixel opening 501 on the substrate layer 100. The orthographic projection of the partition layer 700 on the substrate layer 100 at least partially surrounds the orthographic projection of the first groove 502 on the substrate layer 100; the orthographic projection of the partition layer 700 on the substrate layer 100 at least partially surrounds the orthographic projection of the via 503 on the substrate layer 100.

[0240] refer to Figure 8 The difference between the second distance H2 and the first distance H1 is the third distance H3, the depth of the first groove 502 in the thickness direction H of the pixel defining layer 500 is the fourth distance H4, and the third distance H3 is greater than the fourth distance H4, which ensures that the upper surface of the auxiliary electrode 300 exceeds the notch of the first groove 502.

[0241] refer to Figure 8In the thickness direction H, the thickness of the partition layer 700 is greater than the groove depth of the first groove 502, and the thickness of the partition layer 700 is a first thickness H01. The first thickness H01 is greater than the fourth distance H4, which can ensure that the partition layer 700 effectively isolates the light-emitting layer 220 and can even isolate the second electrode 230.

[0242] refer to Figure 8 The distance between the surface of the partition layer 700 away from the substrate layer 100 and the substrate layer 100 is a fifth distance H5, and the fifth distance H5 is greater than the first distance H1, that is, the upper surface of the partition layer 700 exceeds the upper surface of the auxiliary electrode 300, ensuring the film thickness step difference between the auxiliary electrode 300 and the partition layer 700, so as to achieve a better effect of isolating the light-emitting layer.

[0243] In some examples, Fig. 9 A schematic cross-sectional structure diagram of a display panel along A1-A2 provided in an embodiment of the present application, referring to Fig. 9 , the light-emitting layer 220 is disposed at the pixel opening 501, the second electrode 230 is also disposed at the pixel opening 501, and the second electrode 230 and the auxiliary electrode 300 can be connected through the first groove 502. The first groove 502 can be used to break the light-emitting layer 220 at the edge of the first groove 502; the partition layer 700 is used to break the light-emitting layer 220 at the edge of the partition layer 700, and the partition layer 700 is used to break the second electrode 230 at the edge of the partition layer 700. The function of the partition layer 700 can be to separate the light-emitting layer 220 so that the light-emitting layer 220 between adjacent light-emitting devices 200 is disconnected to avoid light crosstalk between adjacent light-emitting devices 200. In order to ensure that the light-emitting layer 220 is disconnected more thoroughly on the isolation layer 700, the isolation layer 700 usually has a large step difference with the adjacent film layer, and the step difference of the side wall of the isolation layer 700 in the rear direction H is sufficient, which will cause the second electrode 230 to break at the edge of the isolation layer 700. The break of the second electrode 230 requires the auxiliary electrode 300 to provide the required driving signal on the second electrode 230. In some examples, each light-emitting device 200 can be correspondingly provided with at least one auxiliary electrode 300 to ensure that the second electrode 230 receives the corresponding driving signal to achieve normal light emission of the light-emitting device.

[0244] In some examples, the first groove 502 is used to electrically connect at least part of the sidewall of the auxiliary electrode 300 in the thickness direction H to the second electrode 230. At least part of the end surface of the auxiliary electrode 300 close to the first groove 502 is connected to at least part of the end surface of the first groove 502 close to the auxiliary electrode 300, and at least part of the inner wall of the first groove 502 can be connected to at least part of the end surface of the auxiliary electrode 300, which can strengthen the step difference between the bottom of the first groove 502 and the upper surface of the auxiliary electrode 300, and can better isolate the light-emitting layer 220. The light-emitting layer 220 is broken at the connected section to expose at least part of the sidewall of the auxiliary electrode 300, and the sidewall of the auxiliary electrode 300 exposed by the broken light-emitting layer 220 can be used to connect with the second electrode 230.

[0245] Exemplary, reference Figure 8 and Fig. 9 The inner wall of the first groove 502 near the auxiliary electrode 300 is connected to the end face of the auxiliary electrode 300 near the first groove 502. During the setting process of the light-emitting layer 220, part of the light-emitting layer 220 falls into the first groove 502, and part of the light-emitting layer 220 is set on the side of the auxiliary electrode 300 away from the substrate layer 100, and the light-emitting layer 220 is broken at the junction of the first groove 502 and the auxiliary electrode 300, and the side wall of the auxiliary electrode 300 in the thickness direction H is exposed. The second electrode 230 is connected to the exposed side wall of the auxiliary electrode 300, so that the electrical connection between the second electrode 230 and the auxiliary electrode 300 can be achieved.

[0246] In some examples, such as Figure 8 and Fig. 9 As shown, the inner wall of the first groove 502 is not flush with the side wall of the auxiliary electrode 300, that is, the inner wall of the first groove 502 is not coplanar with the side wall of the auxiliary electrode 300, and the bottom of the first groove 502 is expanded outward to enhance the film isolation effect.

[0247] In some examples, at least part of the end surface of the auxiliary electrode 300 near the first groove 502 is flush with at least part of the end surface of the first groove 502 near the auxiliary electrode 300. The flush end surfaces can enhance the fracture of the film layer, and the first groove 502 can be obtained using the auxiliary electrode 300 as a mask during the preparation process.

[0248] For example, Fig. 9As shown, the light-emitting layer 220 is broken at the edge of the partition layer 700, and the second electrode 230 is broken at the edge of the partition layer 700. The light-emitting layer 220 includes a red light-emitting layer r2, a green light-emitting layer g2, and a blue light-emitting layer. The red light-emitting layer r2 is partially arranged at the red pixel opening r1, the green light-emitting layer g2 is partially arranged at the green pixel opening g1, and the blue light-emitting layer is partially arranged at the blue pixel opening b1. The red light-emitting device corresponding to the red light-emitting layer r2 and the green light-emitting device corresponding to the green light-emitting layer g2 are separated by the partition layer 700, and the partition layer 700 can separate the red light-emitting layer r2 and the green light-emitting layer g2.

[0249] For example, Fig. 9 As shown, a portion of the red light-emitting layer r2 and a portion of the green light-emitting layer g2 are provided on the side of the partition layer 700 away from the substrate layer 100. The red light-emitting layer r2 and the green light-emitting layer g2 can be prepared independently by different process flows, and the FFM can be removed to obtain a patterned red light-emitting layer r2, a green light-emitting layer g2 and a blue light-emitting layer, thereby obtaining independent red light-emitting devices, green light-emitting devices and blue light-emitting devices.

[0250] Illustratively, in the preparation process of the display panel, the red light-emitting layer r2 and the second electrode 230 may be arranged in an entire layer first, and the red light-emitting layer r2 outside the area where the red light-emitting device is located may be etched away through an etching process to obtain a red light-emitting device; the green light-emitting layer g2 and the second electrode 230 may be arranged in an entire layer, and the green light-emitting layer g2 in the area outside the green light-emitting device may be etched away through an etching process to obtain a green light-emitting device; the blue light-emitting layer and the second electrode 230 may be arranged in an entire layer, and the blue light-emitting layer in the area outside the blue light-emitting device may be etched away through an etching process to obtain a blue light-emitting device. The boundary between adjacent light-emitting devices may fall on the boundary of the partition layer 700, and the boundary between adjacent light-emitting layers of different colors may fall on the edge of the partition layer 700, or may fall within the area where the partition layer 700 is located. Illustratively, refer to Fig. 9 The second electrode 230 on the side of the partition layer 700 away from the substrate layer 100 is obtained by different film forming processes and etching processes.

[0251] The display panel provided in the embodiment of the present application can isolate the light-emitting layer by setting the isolation layer 700, so as to realize the independent setting of the light-emitting device without using the FFM. The cancellation of the FFM can eliminate the need to consider the influence of the graphic accuracy on the FFM on the arrangement density of the light-emitting device, and can improve the resolution of the display panel. By setting the auxiliary electrode 300 and the auxiliary signal line 400 to provide the second electrode 230 with a driving signal, it can be ensured that the second electrode 230 isolated by the isolation layer 700 stably receives the corresponding driving signal.

[0252] In some embodiments, the orthographic projection of the auxiliary electrode 300 on the substrate layer 100 at least partially surrounds the orthographic projection of the second electrode 230 on the substrate layer. Figure 5 and Fig. 9 Since the second electrode 230 is broken at the edge of the isolation layer 700, the auxiliary electrode 300 connected to the red light-emitting device can partially surround the second electrode 230 of the green light-emitting device; similarly, the auxiliary electrode 300 connected to the green light-emitting device can partially surround the second electrode 230 of the blue light-emitting device; the auxiliary electrode 300 connected to the blue light-emitting device can partially surround the second electrode 230 of the red light-emitting device and partially surround the second electrode 230 of the green light-emitting device.

[0253] In some embodiments, the orthographic projection of the auxiliary electrode 300 on the substrate layer 100 does not overlap with the orthographic projection of the second electrode 230 on the substrate layer 100. The second electrode 230 above the auxiliary electrode 300 may be etched away by etching, leaving only the sidewall of the auxiliary electrode 300 connected to the second electrode 230, so that the orthographic projection of the auxiliary electrode 300 may not overlap with the orthographic projection of the second electrode 230.

[0254] In some embodiments, the orthographic projection of the auxiliary electrode 300 on the substrate layer 100 does not overlap with the orthographic projection of the first electrode 210 on the substrate layer 100. Fig. 9 The auxiliary electrode 300 is separated from the first electrode 210 by a first groove 502, or the auxiliary electrode 300 is separated from the first electrode 210 by a partition layer 700. The projection of the auxiliary electrode 300 in the thickness direction H does not overlap with the projection of the first electrode 210 in the rear direction H, which can facilitate the connection between the auxiliary electrode 300 and the auxiliary signal line 400. No matter which conductive layer the auxiliary signal line is arranged on, it will not be short-circuited with the first electrode 210, and a certain distance of insulation is maintained to avoid crosstalk between signals.

[0255] In some embodiments, the orthographic projection of the auxiliary electrode 300 on the substrate layer 100 partially overlaps with the orthographic projection of the first electrode 210 on the substrate layer 100. The projection of the end of the auxiliary electrode 300 away from the substrate layer 100 in the thickness direction H may partially overlap with the projection of the first electrode 210, and the partial overlap may exist while ensuring that the auxiliary electrode 300 is insulated from the first electrode 210.

[0256] In some embodiments, the orthographic projection of the partition layer 700 on the substrate layer 100 does not overlap with the orthographic projection of the auxiliary electrode 300 on the substrate layer 100. Fig. 9, the orthographic projections of the partition layer 700 and the auxiliary electrode 300 in the thickness direction H do not overlap. The first groove 502, the auxiliary electrode 300 and the partition layer 700 can each play an independent film partitioning role, and the film partitioning roles do not affect each other.

[0257] In some embodiments, the light emitting device 200 further includes multiple light emitting auxiliary layers, at least one of which is disposed on the side of the light emitting layer 220 away from the substrate layer 100. At least one light emitting auxiliary layer is disposed on the side of the light emitting layer 220 close to the substrate layer 100.

[0258] It should be noted that due to the setting of the first groove 502 and the partition layer 700, the light-emitting layer 220 and the light-emitting auxiliary layer will be isolated, then the light-emitting layer 220 corresponding to the effective light-emitting area can be used as an effective light-emitting layer, or the light-emitting layer 220 used to emit light under the drive of the first electrode 210 and the second electrode 230 can be called an effective light-emitting layer, and the isolated light-emitting layer 220 is only connected to the second electrode 230 and cannot emit light. The disconnected light-emitting layer cannot emit light and can be regarded as an invalid light-emitting layer, and the effective light-emitting layer is a light-emitting layer used for emitting light. Similarly, the part of the light-emitting auxiliary layer connected to the effective light-emitting layer can be used as an effective light-emitting auxiliary layer, and the effective light-emitting auxiliary layer is a light-emitting auxiliary layer used for the light-emitting auxiliary layer to emit light.

[0259] Exemplarily, the light-emitting auxiliary layer may include an electron transport layer, an electron generating layer, an electron blocking layer, a hole transport layer, a hole injection layer and a hole blocking layer. The electron generating layer, the electron transport layer and the electron blocking layer may be arranged between the second electrode 230 and the light-emitting layer 220, the electron generating layer is arranged close to the second electrode 230, the electron blocking layer is arranged close to the light-emitting layer, and the electron transport layer is arranged between the electron generating layer and the electron blocking layer. The hole injection layer, the hole transport layer and the hole blocking layer may be arranged between the first electrode 210 and the light-emitting layer 220, the hole injection layer is arranged close to the first electrode 210, the hole blocking layer is arranged close to the light-emitting layer 220, and the hole transport layer is located between the hole injection layer and the hole blocking layer.

[0260] For example, Fig.10 This is a schematic cross-sectional structure diagram of another display panel along A1-A2 provided in an embodiment of the present application. Fig.10 As shown, the light-emitting auxiliary layer includes a first light-emitting auxiliary layer 240 and a second light-emitting auxiliary layer 250, the first light-emitting auxiliary layer 240 is located between the first electrode 210 and the light-emitting layer 220, and the second light-emitting auxiliary layer 250 is located between the second electrode 230 and the light-emitting layer 220. The first light-emitting auxiliary layer 240 may include a hole injection layer, a hole transport layer and a hole blocking layer, and the second light-emitting auxiliary layer 250 may include an electron generation layer, an electron transport layer and an electron blocking layer.

[0261] In some embodiments, the minimum distance between the edge of at least one effective light-emitting auxiliary layer and the auxiliary electrode 300 is the sixth distance, the minimum distance between the edge of the effective light-emitting layer and the auxiliary electrode 300 is the seventh distance, and the sixth distance is greater than the seventh distance. The edge of the effective light-emitting auxiliary layer is retracted relative to the edge of the effective light-emitting layer, which can reduce the signal interference of the auxiliary electrode 300 on the light-emitting auxiliary layer. For example, the hole injection layer is more sensitive to electrical signals and is easily interfered by the electrical signals on the auxiliary electrode 300. Therefore, the hole injection layer can be far away from the auxiliary electrode 300 relative to the light-emitting layer 220. The edges of different light-emitting auxiliary layers can be retracted relative to the edges of the light-emitting layer according to material properties.

[0262] Exemplary, reference Fig.10 , both the first light-emitting auxiliary layer 240 and the second light-emitting auxiliary layer 250 can serve as effective light-emitting auxiliary layers, and the edge of the first light-emitting auxiliary layer 240 can be flush with the edge of the second light-emitting auxiliary layer 250. The edge of the first light-emitting auxiliary layer 240 may or may not be flush with the edge of the second light-emitting auxiliary layer 250, which is not specifically limited in the embodiments of the present application. The distance between the edge of the first light-emitting auxiliary layer 240 and the edge of the auxiliary electrode 300 is the sixth distance L6, and the distance between the edge of the effective light-emitting layer 201 and the auxiliary electrode 300 is the seventh distance L7. If the sixth distance L6 is greater than the seventh distance L7, the edge of the first light-emitting auxiliary layer 240 is retracted relative to the edge of the effective light-emitting layer 201, which can avoid the first light-emitting auxiliary layer 240 being too close to the auxiliary electrode 300 and causing signal interference.

[0263] For example, Fig.10 As shown, the first light-emitting auxiliary layer 240 and the second light-emitting auxiliary layer 250 are directly or indirectly disposed on the inner wall of the pixel opening 501 , which can increase the contact area with the effective light-emitting layer 201 and increase the light-emitting area.

[0264] In some embodiments, at least part of the sidewall of the partition layer 700 in the thickness direction H includes a first sidewall segment and a second sidewall segment, the first sidewall segment is away from the substrate layer 100 relative to the second sidewall segment; the orthographic projection of the side surface of the partition layer 700 corresponding to the first sidewall segment on the substrate layer 100 is the first projection, and the orthographic projection of the side surface of the partition layer 700 corresponding to the second sidewall segment on the substrate layer is the second projection, and the first projection surrounds the second projection. The first projection and the second projection can be lines, and the first projection surrounding the second projection corresponds to the second sidewall segment being inwardly contracted relative to the first sidewall segment, that is, forming the partition layer 700 to be wide at the top and narrow at the bottom. It should be noted that the top in the embodiment of the present application refers to the direction away from the substrate layer 100, and the bottom refers to the direction close to the substrate layer 100.

[0265] For example, Fig.11This is a schematic cross-sectional structure diagram of another display panel along A1-A2 provided in an embodiment of the present application. Fig.11 As shown, the second side wall segment 702 of the partition layer 700 is retracted relative to the first side wall segment 701 , so as to better partition the light emitting layer 220 .

[0266] In some embodiments, the display panel further includes an encapsulation layer, which is disposed on a side of the second electrode 230 away from the substrate layer 100. The encapsulation layer is used to protect the light-emitting device from being corroded by external water samples, and the encapsulation layer can protect the second electrode 230, the light-emitting layer 220, the first electrode 210, and the like.

[0267] In some examples, such as Fig.11 As shown, the encapsulation layer 800 is disposed on a side of the second electrode 230 away from the substrate layer 100, and the encapsulation layer 800 may include a first inorganic encapsulation layer 810, an organic encapsulation layer 820, and a second inorganic encapsulation layer 830. The organic encapsulation layer 820 is located between the first inorganic encapsulation layer 810 and the second inorganic encapsulation layer 830, and the first inorganic encapsulation layer 810 is located between the second electrode 230 and the organic encapsulation layer 820. The thickness of the first inorganic encapsulation layer 810 and the second inorganic encapsulation layer 830 are both less than the thickness of the organic encapsulation layer 820. The organic encapsulation layer 820 may be prepared by an IJP (inkjet printing) process, and the first inorganic encapsulation layer 810 and the second inorganic encapsulation layer 830 may be prepared by a conventional chemical vapor deposition process.

[0268] In some examples, such as Fig.11 As shown, in the process of preparing the red light-emitting device, the first inorganic encapsulation layer 810 can be prepared after the second electrode 230, and before preparing the green light-emitting device, the first inorganic encapsulation layer 810 can be etched away in the corresponding area, and the second electrode 230 of the red light-emitting device can be protected by the first inorganic encapsulation layer 810 during the etching process. After all the light-emitting devices are prepared, the organic encapsulation layer 820 and the second inorganic encapsulation layer 830 are set.

[0269] In some examples, such as Fig.11 As shown, the first groove 502 may be provided with a portion of the first inorganic encapsulation layer 810, the gap formed between the broken light-emitting layer 220 and the partition layer 700 may be filled with the first inorganic encapsulation layer 810, the gap between the broken second electrode 230 and the side wall of the partition layer 700 may be filled with the first inorganic encapsulation layer 810, and the gap between the broken second electrode 230 and the side wall of the partition layer 700 may also be filled with a portion of the organic encapsulation layer 820. A portion of the second sidewall segment 702 may be connected to the first inorganic encapsulation layer 810, and a portion of the second sidewall segment 702 may be connected to the organic encapsulation layer 820.

[0270] In some examples, Fig.12A schematic partial structural diagram of another display panel provided in an embodiment of the present application. Fig.12 FIG. 4 is a schematic partial top view of the display panel from the side where the encapsulation layer is located; Fig.13 This is a schematic cross-sectional structure diagram of a display panel along B1-B2 provided in an embodiment of the present application. Fig.12 As shown, the boundary 703 of the partition layer 700 surrounds the pixel opening 501. Fig.13 As shown, at least part of the sidewall of the partition layer 700 in the thickness direction H includes a protruding structure 704, and the protruding structure 704 is disposed at one end of the sidewall of the partition layer 700 away from the substrate layer 100. Fig.11 and Fig.13 The raised surface of the raised structure 704 can be used as the first side wall segment 701 , and the setting of the raised structure 704 can realize the setting of the side surface of the isolation layer 700 to be wide at the top and narrow at the bottom.

[0271] For example, Fig.12 As shown, the red light emitting device R and the green light emitting device G on both sides of the auxiliary signal line 400 are connected to the auxiliary signal line 400. The blue light emitting device B and the red light emitting device R in the same pixel unit are connected to the same auxiliary signal line 400. Each light emitting device is connected to an auxiliary signal line 400, and the light emitting devices are connected to the auxiliary signal lines 400 in a one-to-one correspondence.

[0272] Exemplary, reference Fig.12 , the edge of the light emitting layer 220 and the second electrode 230 separated by the partition layer 700 falls outside the pixel opening 501. Fig.13 , the edge of the light emitting layer 220 and the second electrode 230 separated by the partition layer 700 falls within the pixel opening 501 .

[0273] In some embodiments, the pixel defining layer 500 further includes a second groove, which is disposed between the pixel opening 501 and the isolation layer 700; the notch of the second groove is located on the side of the pixel defining layer 500 away from the substrate layer 100, and the inner wall of the second groove is connected to the side wall of the isolation layer 700 in the thickness direction H. The provision of the second groove can increase the film layer step difference between the isolation layer 700 and the pixel defining layer 500, and can enhance the isolation effect on the light emitting layer 220.

[0274] In some examples, Fig.14 This is a schematic cross-sectional structural diagram of another display panel along B1-B2 provided in an embodiment of the present application. Fig.14 As shown, the second groove 504 is disposed on a side of the pixel defining layer 500 away from the substrate layer 100, and the inner wall of the second groove 504 is coplanar with the side wall of the partition layer 700 in the thickness direction H. Fig.11The inner wall of the second groove 504 close to the partition layer 700 can be connected to the second side wall segment 702 , and the inner wall of the second groove 504 can lengthen the second side wall segment 702 and enhance the partition effect of the light-emitting layer 220 .

[0275] In some examples, such as Fig.14 As shown, the groove depth of the second groove 504 in the thickness direction H is an eighth distance H8, the thickness of the pixel defining layer 500 in the thickness direction H is a ninth distance H9, and the ratio of the eighth distance H8 to the ninth distance may range from 1 / 10 to 1 / 4, for example, 1 / 5, 1 / 7, 1 / 8, or 1 / 9, etc. Exemplarily, the groove depth of the second groove 504 in the thickness direction H may range from 0.1 to 0.5 microns, for example, 0.25, 0.3, 0.37, 0.45, or 0.47 microns, etc.

[0276] In some examples, Fig.15 This is a schematic cross-sectional structure diagram of another display panel along B1-B2 provided in an embodiment of the present application. Fig.15 As shown, the orthographic projection of the second groove 504 on the substrate layer 100 surrounds the orthographic projection of the pixel opening 501 on the substrate layer 100. The dimension of the second groove 504 in the direction from the partition layer 700 to the pixel opening 501 is a first dimension L8, the first dimension L8 is greater than or equal to the step difference of the side wall of the partition layer 700 in the thickness direction H, the step difference of the side wall of the partition layer 700 in the thickness direction H is a second dimension L9, L8>L9, the diameter of the second groove 504 can be increased to be greater than the step difference of the side wall of the partition layer 700, and the partition effect on the light-emitting layer 220 can be further enhanced.

[0277] In some examples, such as Fig.15 As shown, a portion of the first inorganic packaging layer 810 is disposed in the second groove 504 .

[0278] In some embodiments, the pixel defining layer 500 may include a fourth groove, the notch of the fourth groove is located on the side of the pixel defining layer 500 away from the substrate layer 100, and the fourth groove is disposed between adjacent pixel openings 501; the partitioning layer 700 includes a third opening, the third opening penetrates the partitioning layer 700, and the orthographic projection of the third opening on the substrate layer 100 covers the orthographic projection of the fourth groove on the substrate layer 100. The orthographic projection of the third opening 730 on the substrate layer 100 surrounds the orthographic projection of the pixel opening 501 on the substrate layer 100. The third opening 730 is connected to the fourth groove 505 to form a film layer depression, which can be used to partition the light-emitting layer 220.

[0279] In some examples, Fig.16 This is a schematic cross-sectional structure diagram of another display panel along B1-B2 provided in an embodiment of the present application. Fig.16As shown, the inner wall of the fourth groove 505 of the pixel defining layer 500 can be connected to the inner wall of the third opening 730 of the isolation layer 700 , and the fourth groove 505 can be connected to the third opening 730 to form a film layer depression on the side away from the substrate layer 100 , and the film layer depression can be used to isolate the light-emitting layer 220 .

[0280] For example, Fig.16 The diameter of the fourth groove 505 at one end close to the substrate layer 100 is larger than the diameter at one end away from the substrate layer 100. The inner diameter of the third opening 730 can be the same as the inner diameter of the fourth groove 505, and the partition layer 700 provided with the third opening 730 can be used as an etching mask pattern of the fourth groove 505 to reduce the process flow.

[0281] In some examples, the inner diameter of the fourth groove 505 at the end away from the substrate layer 100 may be larger than the inner diameter of the third opening 730 , which may further enhance the partition effect on the light emitting layer 220 .

[0282] Exemplarily, the ratio of the groove depth of the fourth groove 505 to the thickness of the pixel defining layer 500 can range from 1 / 3 to 1 / 2, and the numerical range of the groove depth of the fourth groove 505 can be 0.5 to 1 micron, for example, it can be 0.55, 0.67, 0.75, 0.88 or 0.95 micron, etc.

[0283] In some examples, Fig.17 This is a schematic cross-sectional structure diagram of a display panel along B1-B2 provided in an embodiment of the present application. Fig.17 As shown, the light-emitting layer 220 and the second electrode 230 are broken at the edge of the third opening 730. The fourth groove 505 can deepen the depth of the third opening 730 in the thickness direction H and enhance the partition effect. Part of the light-emitting layer 220 and the second electrode 230 can be disposed in the connected third opening 730 and fourth groove 505. Part of the first inorganic insulating layer 810 can be disposed in the third opening 730.

[0284] In some embodiments, the second electrodes 230 of two adjacent light-emitting devices 200 are electrically connected to the auxiliary signal line 400 between the two adjacent light-emitting devices 200, the direction in which one of the two adjacent light-emitting devices 200 points to the other is the first direction, the connecting line of the vias 503 corresponding to the auxiliary electrodes 300 connected to the two adjacent light-emitting devices 200 extends along the second direction, the first direction is parallel to the second direction, the second electrodes 230 of the light-emitting devices 200 are connected to at least two vias 503, and in the first direction, at least one via 503 can be respectively set on both sides of the light-emitting device 200. In adjacent pixel units, an auxiliary signal line 400 can be set between two adjacent light-emitting devices 200 along the first direction.

[0285] In some examples, Fig.18 A schematic partial structural diagram of a display panel provided in an embodiment of the present application; Fig.19 A schematic cross-sectional structure diagram of a display panel along line C1-C2 provided in an embodiment of the present application; Fig. 20 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. Figures 18 to 20 , an auxiliary signal line 400 is disposed between two adjacent rows of first electrodes 210 in the column direction Y. Fig. 20 As shown, auxiliary signal lines 400 are disposed on both sides of each first electrode 210 in the column direction Y.

[0286] It should be noted that auxiliary signal lines 400 may also be arranged between adjacent columns of first electrodes 210 , and the arrangement of the auxiliary signal lines 400 may be arranged according to different arrangements of light emitting devices.

[0287] In some examples, at least two vias 503 between two adjacent pixel openings 501 are connected to the same auxiliary signal line 400. Fig.18 As shown, in the column direction Y, the auxiliary electrodes 300 corresponding to two adjacent light-emitting devices are connected to the same auxiliary signal line 400, and the same light-emitting device is connected to two auxiliary electrodes 300. The two auxiliary electrodes 300 corresponding to the same light-emitting device are respectively located on both sides of the first electrode 210. The auxiliary electrodes 300 on both sides of the auxiliary signal line 400 in the column direction Y are connected to the auxiliary signal line 400.

[0288] For example, Fig.18 As shown, the blue light emitting device B and the green light emitting device G are connected to the same auxiliary signal line 400, and the blue light emitting device B and the red light emitting device R are connected to the same auxiliary signal line 400. The light emitting devices are connected to the auxiliary electrodes 300 in pairs, and the light emitting devices are connected to the auxiliary signal lines 400 in pairs.

[0289] In some examples, such as Fig.18 and Fig.19 As shown, the connection line of adjacent pixel openings 501 is parallel to the first direction D1, and the direction in which the first electrode 210 points to the auxiliary signal line 400 is parallel to the first direction D1. The connection line between adjacent first electrodes 210 in the same column extends along the second direction D2, and the second direction D2 is parallel to the column direction Y, and the second direction D2 is parallel to the first direction D1.

[0290] In some examples, such as Fig.19 As shown, two via holes 503 are disposed between adjacent first electrodes 210 , and the two via holes 503 correspond to the same auxiliary signal line 400 , and the two via holes 503 are connected to two different auxiliary electrodes 300 .

[0291] In some embodiments, reference Fig.19 The pixel opening 501 includes a first opening 506 and a second opening 507. The first opening 506 and the second opening 507 are connected to form the pixel opening 501. The first opening 506 is away from the substrate layer 100 relative to the second opening 507. The inner diameter of the first opening 506 is greater than the inner diameter of the second opening 507. A step structure 508 is formed at the junction of the inner wall of the first opening 506 and the inner wall of the second opening 507. The step structure 508 can be formed by etching.

[0292] In some embodiments, Fig.21 This is a schematic cross-sectional structure diagram of another display panel along C1-C2 provided in an embodiment of the present application. Fig.21 As shown, one end of the auxiliary electrode 300 close to the pixel opening 501 is connected to the step structure 508, and the second electrode 230 is connected to one end of the auxiliary electrode 300 close to the pixel opening 501. One end of the auxiliary electrode 300 close to the pixel opening 501 is disposed on at least a portion of the inner wall of the first opening 506, and the second electrode 230 is connected to the auxiliary electrode 300 on the inner wall of the first opening 506.

[0293] In some embodiments, Fig.21 As shown, the orthographic projection of the partition layer 700 on the substrate layer 100 at least partially overlaps with the orthographic projection of the auxiliary electrode 300 on the substrate layer 100 .

[0294] In some examples, Fig. 22 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. Fig.21 and Fig. 22 As shown, at least two vias 503 between two adjacent pixel openings 501 are connected to different auxiliary electrodes 300, the area between at least two vias 503 between two adjacent pixel openings 501 is the first area 110, the first area includes a first sub-area 111, the edge of the first area 110 does not overlap with the edge of the first sub-area 111, the orthographic projection of the partition layer 700 on the substrate layer 100 does not overlap with the orthographic projection of the first sub-area 111 on the substrate layer 100, and the orthographic projection of the auxiliary signal line 400 on the substrate layer 100 covers the orthographic projection of the first sub-area 111 on the substrate layer; at least two vias 503 between two adjacent pixel openings 501 are connected to the same auxiliary electrode 300.

[0295] In some examples, such as Fig. 22As shown, the area between adjacent pixel openings 501 is the second area 120, the second area 120 includes a second sub-area 121, the edge of the second area 120 does not overlap with the edge of the second sub-area 121, the orthographic projection of the second sub-area 121 on the substrate layer 100 does not overlap with the orthographic projection of the via 503 on the substrate layer 100; the orthographic projection of the partition layer 700 on the substrate layer 100 does not overlap with the orthographic projection of the second sub-area 121 on the substrate layer 100.

[0296] In some embodiments, Fig.23 A schematic cross-sectional structure diagram of another display panel along C1-C2 provided in an embodiment of the present application, as shown in FIG. Fig.23 As shown, the side wall of the isolation layer 700 in the thickness direction H also includes a third side wall segment 705, the second side wall segment 702 is located between the first side wall segment 701 and the third side wall segment 705, and the third side wall segment 705 is closer to the substrate layer 100 relative to the second side wall segment 702; the positive projection of the side surface of the isolation layer 700 corresponding to the third side wall segment 705 on the substrate layer 100 is the third projection, and the first projection surrounds the third projection, so a step difference structure can be formed on the side wall of the isolation layer 700, and in the thickness direction H, the side wall of the isolation layer 700 has a step difference structure that is wide at the upper and lower sides and narrow in the middle.

[0297] In some examples, at least two of the first sidewall segment 701 , the second sidewall segment 702 , and the third sidewall segment 705 are located on a sidewall of the partition layer 700 away from the pixel opening 501 .

[0298] For example, Fig.23 As shown, the first side wall segment 701 , the second side wall segment 702 and the third side wall segment 705 are all disposed on the side wall of the partition layer 700 facing the pixel opening 501 .

[0299] For example, Fig.23 As shown, the first side wall segment 701, the second side wall segment 702 and the third side wall can form a rectangular groove-shaped step difference structure.

[0300] In some examples, Fig.24 A schematic cross-sectional structure diagram of another display panel along C1-C2 provided in an embodiment of the present application. Fig.24 As shown, the first side wall segment 701 , the second side wall segment 702 and the third side wall are all arranged on the side of the partition layer 700 away from the pixel opening 501 .

[0301] In some examples, Fig.25 This is a schematic cross-sectional structure diagram of a display panel along C1-C2 provided in an embodiment of the present application. Fig.25As shown, the first side wall segment 701, the second side wall segment 702 and the third side wall can form a trapezoidal groove-shaped step difference structure, that is, the side wall of the isolation layer 700 in the thickness direction H has a trapezoidal groove 706, each auxiliary electrode 300 can correspond to two side walls with trapezoidal grooves 706, and the two side walls with trapezoidal grooves 706 can be arranged opposite to each other, and the notches of the two trapezoidal grooves 706 are arranged opposite to each other.

[0302] In some examples, Fig.26 This is a schematic cross-sectional structure diagram of another display panel along C1-C2 provided in an embodiment of the present application. Fig.26 As shown, the cross section of the partition layer 700 is an inverted trapezoid, the outer diameter of the partition layer 700 away from the substrate layer 100 is larger than the outer diameter of the partition layer 700 close to the substrate layer 100, and the side wall of the partition layer 700 in the thickness direction H is a plane side wall.

[0303] In some examples, Fig. 27 A schematic cross-sectional structure diagram of another display panel along C1-C2 provided in an embodiment of the present application. Fig. 27 As shown, a third groove 707 is provided on the side of the partition layer 700 away from the substrate layer 100; in the direction of the line connecting two adjacent pixel openings 501, the inner diameter of the end of the third groove 707 away from the substrate layer 100 is smaller than the inner diameter of the end of the third groove 707 close to the substrate layer 100. The third groove 707 can be an inverted trapezoidal groove.

[0304] In some examples, such as Fig. 27 As shown, a portion of the first inorganic encapsulation layer 810 is disposed in the third groove 707 .

[0305] In some embodiments, reference Fig.21 , 23 27 , the side of the partition layer 700 close to the substrate layer 100 is connected to the auxiliary electrode 300 .

[0306] In some examples, the auxiliary electrode 300 provided in the embodiment of the present application may include at least one of titanium, aluminum, molybdenum, copper, indium tin oxide and silver. For example, the auxiliary electrode 300 may be a metal film layer stack structure of titanium aluminum titanium or molybdenum aluminum molybdenum, and the auxiliary electrode 300 may also be a single layer of conductive material film, etc. Exemplarily, in the case of a film layer stack of indium tin oxide-silver-indium tin oxide, the thickness of indium tin oxide may range from 30 to 500 angstroms, the thickness of silver may range from 500 to 2000 angstroms, and 1 angstrom = 0.1 nanometers.

[0307] In some examples, the auxiliary signal line 400 may include at least one of titanium, aluminum, molybdenum, copper, indium tin oxide and silver. For example, the auxiliary signal line 400 may be a single-layer conductive layer film, a metal film layer stack structure of titanium aluminum titanium or molybdenum aluminum molybdenum, etc.

[0308] In some examples, the material of the isolation layer 700 may be organic, inorganic or metal, which is not specifically limited in the embodiments of the present application.

[0309] In some examples, Fig.28 A schematic cross-sectional structure diagram of another display panel along C1-C2 provided in an embodiment of the present application. Fig.28 As shown, two via holes 503 are disposed between two adjacent first electrodes 210 , and when the via holes 503 and the auxiliary electrodes 300 are disposed in a one-to-one correspondence, the auxiliary signal line 400 can be disposed in the same layer as the source-drain electrode 613 .

[0310] In some examples, Fig.29 This is a schematic cross-sectional structure diagram of a display panel along C1-C2 provided in an embodiment of the present application. Fig.29 As shown, two via holes 503 are provided between two adjacent first electrodes 210, and the via holes 503 are provided in one-to-one correspondence with the auxiliary electrodes 300, and the auxiliary signal line 400 can be provided in the same layer as the gate 611. A buffer insulating layer can be provided between the substrate layer 100 and the gate 611, a gate insulating layer can be provided between the gate and the active layer 612, an interlayer insulating layer can be provided between the active layer 612 and the source-drain electrode 613, and a planarization layer and a passivation layer can be provided between the source-drain electrode 613 and the first electrode 210, etc., which are not specifically limited in the embodiment of the present application.

[0311] It should be noted that Fig.29 The structure of the driving transistor 610 shown is only schematic, and may also be a top-gate structure, which is not specifically limited in the embodiment of the present application.

[0312] According to a second aspect of the embodiments of the present application, a display device is provided. Fig.30 Schematic diagram of a display device provided in an embodiment of the present application. Fig.30 As shown, the display device includes the display panel 1000 provided in the first aspect.

[0313] It should be noted that the display device may further include a control mainboard, a battery component, a protective shell, a support assembly, etc. The control mainboard may be electrically connected to the display panel, and the battery component may be electrically connected to the control mainboard.

[0314] It should be noted that the display devices provided in the examples of this application may include smart phones, tablet computers, laptop computers, televisions, and smart wearable display devices, etc. Smart wearable display devices may include smart watches, VR (augmented reality) displays, and AR (virtual reality) displays, etc., and the embodiments of this application are not specifically limited.

[0315] According to a third aspect of the embodiments of the present application, a method for preparing a display panel is provided, which is used to prepare the display panel according to the first aspect. Fig.31 The following is a schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application. Fig.31 As shown, the method for preparing the display panel includes:

[0316] S900: Auxiliary signal lines, a plurality of light-emitting devices and a plurality of auxiliary electrodes are respectively arranged on one side of the substrate layer.

[0317] The light emitting device comprises a first electrode, a light emitting layer and a second electrode, the light emitting layer is arranged between the first electrode and the second electrode, the second electrode is electrically connected to at least one auxiliary electrode, and the auxiliary signal line is electrically connected to at least two auxiliary electrodes.

[0318] The display panel provided in the embodiment of the present application is provided with an auxiliary electrode 300 and an auxiliary signal line 400, and the second electrode 230 is electrically connected through the auxiliary electrode 300, and the auxiliary signal line 400 can provide a second driving signal for the second electrode 230. On the one hand, all the auxiliary signal lines 400 can be connected to the same second driving signal, and the setting of the auxiliary signal line 400 and the auxiliary electrode 300 is equivalent to a parallel resistor, which can reduce the path impedance of the second electrode 230, reduce the IRDrop on the second electrode 230, and improve the display effect. On the other hand, the auxiliary signal line 400 provides the second driving signal to the second electrode 230, which can ensure that the second electrode 230 receives the required second driving signal, and avoids the display abnormality problem caused by the second electrode 230 set in the whole layer breaking along with the light-emitting layer 220.

[0319] In some embodiments, Fig.32 A schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application. Fig.32 As shown, the light-emitting layer includes a first light-emitting layer 221, a second light-emitting layer 222 and a third light-emitting layer 223, and the first light-emitting layer 221, the second light-emitting layer 222 and the third light-emitting layer 223 are respectively used to emit light of different colors, and the regions where the first light-emitting layer 221, the second light-emitting layer 222 and the third light-emitting layer 223 are located are the third region 130, the fourth region 140 and the fifth region 150, respectively; illustratively, the first light-emitting layer 221 can emit red light, the second light-emitting layer 222 can emit green light, and the third light-emitting layer 223 can emit blue light.

[0320] A plurality of light emitting devices are arranged on one side of the substrate layer, which may include:

[0321] S901: Disposing a plurality of first electrodes 210 on one side of the substrate layer 100;

[0322] A pixel defining layer 500 is disposed on a side of the first electrode 210 away from the substrate layer 100;

[0323] The side of the pixel definition layer 500 away from the substrate layer 100 is etched to obtain a plurality of pixel openings 501 . The pixel openings 501 are used to expose at least a portion of the first electrode 210 .

[0324] S902: Disposing a first light emitting layer 221 on a side of the pixel defining layer 500 away from the substrate layer 100 , so that the first light emitting layer 221 is electrically connected to the first electrode 210 exposed by the pixel opening 501 ;

[0325] A second electrode 230 is disposed on a side of the first light-emitting layer 221 away from the substrate layer 100, and the second electrode 230 is electrically connected to the first light-emitting layer 221 to form a light-emitting device in the third region 130; illustratively, the light-emitting device formed in the third region 130 may be a red light-emitting device;

[0326] A packaging layer is provided on a side of the second electrode 230 away from the substrate layer 100; the packaging layer in this step may be a first inorganic packaging layer 810;

[0327] The encapsulation layer, the second electrode 230 and the first light-emitting layer 221 in the fourth region 140 and the fifth region 150 are removed; the process of removing the film layer may be an etching process or the like.

[0328] S903: disposing a second light emitting layer 222 on a side of the pixel defining layer 500 away from the substrate layer 100 , so that the second light emitting layer 222 is electrically connected to the first electrode 210 exposed by the pixel opening 501 ;

[0329] A second electrode 230 is disposed on a side of the second light-emitting layer 222 away from the substrate layer 100, and the second electrode 230 is electrically connected to the second light-emitting layer 222, so as to form a light-emitting device in the fourth region 140; the light-emitting device formed in the fourth region 140 may be a green light-emitting device;

[0330] An encapsulation layer is disposed on a side of the second electrode 230 away from the substrate layer 100; the encapsulation layer may include a first inorganic encapsulation layer 810;

[0331] The encapsulation layer, the second electrode 230 and the second light emitting layer 222 in the third region 130 and the fifth region 150 are removed.

[0332] S904: disposing a third light-emitting layer 223 on a side of the pixel defining layer 500 away from the substrate layer 100 , so that the third light-emitting layer 223 is electrically connected to the first electrode 210 exposed by the pixel opening 501 ;

[0333] A second electrode 230 is disposed on a side of the third light-emitting layer 223 away from the substrate layer 100, and the second electrode 230 is electrically connected to the third light-emitting layer 223, so as to form a light-emitting device in the fifth region 150, and a blue light-emitting device can be formed;

[0334] An encapsulation layer is disposed on a side of the second electrode 230 away from the substrate layer 100; a first inorganic encapsulation layer 810 may be disposed;

[0335] The encapsulation layer, the second electrode 230 and the third light emitting layer 223 in the third region 130 and the fourth region 140 are removed.

[0336] It should be noted that after the red light emitting device, the green light emitting device and the blue light emitting device are prepared, the inorganic encapsulation layer 820 and the second inorganic encapsulation layer 830 may be disposed.

[0337] In some implementations, setting an auxiliary signal line may include:

[0338] Before a plurality of first electrodes 210 are disposed on one side of the substrate layer 100, an auxiliary signal line 400 is disposed on one side of the substrate layer. Figure 3 and Figure 4 As shown, the auxiliary signal line 400 is in a different layer from the first electrode 210, and the auxiliary signal line 400 is arranged in the same layer as the conductive layer before the first electrode 210, so the arrangement process of the auxiliary signal line 400 is prior to the arrangement process of the first electrode 210. The process of arranging in the same layer can save the process flow and the number of masks required for etching patterns, and greatly reduce production costs.

[0339] In some implementations, setting an auxiliary signal line may include:

[0340] A first electrode layer is disposed on one side of the substrate layer 100;

[0341] The first electrode layer is etched to obtain a plurality of first electrodes 210 and auxiliary signal lines 400 .

[0342] Exemplary, reference Figure 1 , the first electrode 210 and the auxiliary signal line 400 can be prepared in the same layer, and the preparation process is synchronized.

[0343] In some implementations, setting an auxiliary signal line may include:

[0344] A driving layer 600 is arranged between the substrate layer 100 and the light-emitting device 200. The driving layer 600 includes a pixel driving circuit. When the pixel driving circuit includes multiple conductive layers, multiple conductive layers are arranged on one side of the substrate layer 100, and the conductive layers are etched to obtain the pixel driving circuit and auxiliary signal lines.

[0345] In some embodiments, reference Figure 7 , etching the side of the pixel definition layer away from the substrate layer may include:

[0346] The side of the pixel defining layer 500 away from the substrate layer 100 is etched to obtain a plurality of pixel openings 501 and a plurality of via holes 503 , wherein the via holes 503 are located between adjacent pixel openings 501 .

[0347] Before setting the luminous layer, also include:

[0348] The auxiliary electrode 300 is disposed on a side of the pixel defining layer 500 away from the substrate layer 100 , so that the auxiliary electrode 300 is electrically connected to the auxiliary signal line 400 through the via hole 503 .

[0349] A partition layer 700 is disposed on a side of the pixel defining layer 500 away from the substrate layer 100 , wherein an orthographic projection of the partition layer 700 on the substrate layer 100 does not overlap with an orthographic projection of the pixel opening 501 on the substrate layer 100 .

[0350] It should be noted that the step of providing the partition layer 700 may be after the step of providing the auxiliary electrode 300 , or the step of providing the partition layer 700 may be before the step of providing the auxiliary electrode 300 , which is not specifically limited in the embodiment of the present application.

[0351] In some embodiments, reference Figure 7 , before setting the auxiliary electrode, it may include:

[0352] A first groove 502 may also be obtained during the etching of the pixel definition layer 500 , and the via hole 503 is located between the first groove 502 and the pixel opening 501 .

[0353] After setting up the auxiliary electrode, you can include:

[0354] A first groove 502 is etched between the pixel opening 501 and the via hole 503 of the pixel defining layer 500 . The first groove may be etched using the edge of the auxiliary electrode 300 close to the pixel opening 501 as a mask.

[0355] Exemplary, reference Figure 7, the direction from the pixel opening 501 to the first groove 502 is the reference direction L, and the direction from the pixel opening 501 to the partition layer 700 is also the reference direction L. Since the pixel opening 501 is a closed shape, the reference direction L is not unique. In the reference direction L, the diameter of the first groove 502 at the end away from the substrate layer 100 is the first diameter L1, and the diameter of the first groove 502 at the end close to the substrate layer 100 is the second diameter L2. The first diameter L1 is smaller than the second diameter L2. The first groove 502 is wide at the top and wide at the bottom, so that the edge of the first groove 502 is partitioned by the light-emitting layer 220. The dimension of the partition layer 700 at the end away from the substrate layer 100 is the third outer diameter L3, and the dimension of the partition layer 700 at the end close to the substrate layer 100 is the fourth outer diameter L4. The third outer diameter L3 is larger than the fourth outer diameter L4. The partition layer 700 is wide at the top and narrow at the bottom, so that the light-emitting layer 220 can be better partitioned to achieve light isolation between light-emitting devices.

[0356] In some embodiments, reference Fig. 9 , setting a light-emitting layer may include:

[0357] A light-emitting layer 220 is disposed on a side of the pixel defining layer 500 away from the substrate 100 so that the light-emitting layer 220 is electrically connected to the first electrode 210 exposed by the pixel opening 501 , and the light-emitting layer 220 is broken at the edge of the first groove 502 , and the light-emitting layer 220 is broken at the edge of the isolation layer 700 .

[0358] Providing a second electrode may include:

[0359] The second electrode 230 is disposed on a side of the light emitting layer 220 away from the substrate layer 100 , so that the second electrode 230 is electrically connected to the auxiliary electrode 300 through the first groove 502 , and the second electrode 230 is broken at the edge of the isolation layer 700 .

[0360] refer to Figure 8 and Fig. 9 The inner wall of the first groove 502 near the auxiliary electrode 300 is connected to the end face of the auxiliary electrode 300 near the first groove 502. During the setting process of the light-emitting layer 220, part of the light-emitting layer 220 falls into the first groove 502, and part of the light-emitting layer 220 is set on the side of the auxiliary electrode 300 away from the substrate layer 100, and the light-emitting layer 220 is broken at the junction of the first groove 502 and the auxiliary electrode 300, and the side wall of the auxiliary electrode 300 in the thickness direction H is exposed. The second electrode 230 is connected to the exposed side wall of the auxiliary electrode 300, so that the electrical connection between the second electrode 230 and the auxiliary electrode 300 can be achieved.

[0361] In some examples, such as Figure 8 and Fig. 9As shown, the inner wall of the first groove 502 is not flush with the side wall of the auxiliary electrode 300, that is, the inner wall of the first groove 502 is not coplanar with the side wall of the auxiliary electrode 300, and the bottom of the first groove 502 is expanded outward to enhance the film isolation effect.

[0362] In some embodiments, reference Fig.19 , etching the side of the pixel definition layer away from the substrate layer may include:

[0363] The side of the pixel defining layer 500 away from the substrate layer 100 is etched to obtain a plurality of first openings 506 and a plurality of second openings 507, wherein the first opening 506 is connected to the second opening 507 to form a pixel opening 501, the first opening 506 is away from the substrate layer 100 relative to the second opening 507, the inner diameter of the first opening 506 is greater than the inner diameter of the second opening 507, and a step structure 508 is formed at the junction of the inner wall of the first opening 506 and the inner wall of the second opening 507.

[0364] Setting up auxiliary electrodes may include:

[0365] An auxiliary electrode 300 is disposed on a side of the pixel defining layer 500 away from the substrate layer 100 , so that the auxiliary electrode 300 is electrically connected to the auxiliary signal line 400 through the via hole 503 , and one end of the auxiliary electrode 300 close to the pixel opening 501 is connected to the step structure 508 .

[0366] It should be noted that the step of providing the auxiliary electrode 300 may be provided after the step of etching the pixel defining layer 500 .

[0367] In some examples, at least two vias 503 between two adjacent pixel openings 501 are connected to the same auxiliary signal line 400. Fig.18 As shown, in the column direction Y, the auxiliary electrodes 300 corresponding to two adjacent light-emitting devices are connected to the same auxiliary signal line 400, and the same light-emitting device is connected to two auxiliary electrodes 300. The two auxiliary electrodes 300 corresponding to the same light-emitting device are respectively located on both sides of the first electrode 210. The auxiliary electrodes 300 on both sides of the auxiliary signal line 400 in the column direction Y are connected to the auxiliary signal line 400.

[0368] For example, Fig.18 As shown, the blue light emitting device B and the green light emitting device G are connected to the same auxiliary signal line 400, and the blue light emitting device B and the red light emitting device R are connected to the same auxiliary signal line 400. The light emitting devices are connected to the auxiliary electrodes 300 in pairs, and the light emitting devices are connected to the auxiliary signal lines 400 in pairs.

[0369] In some examples, such as Fig.18 and Fig.19As shown, the connection line of adjacent pixel openings 501 is parallel to the first direction D1, and the direction in which the first electrode 210 points to the auxiliary signal line 400 is parallel to the first direction D1. The connection line between adjacent first electrodes 210 in the same column extends along the second direction D2, and the second direction D2 is parallel to the column direction Y, and the second direction D2 is parallel to the first direction D1.

[0370] In some examples, such as Fig.19 As shown, two via holes 503 are disposed between adjacent first electrodes 210 , and the two via holes 503 correspond to the same auxiliary signal line 400 , and the two via holes 503 are connected to two different auxiliary electrodes 300 .

[0371] In some embodiments, reference Fig.19 The pixel opening 501 includes a first opening 506 and a second opening 507. The first opening 506 and the second opening 507 are connected to form the pixel opening 501. The first opening 506 is away from the substrate layer 100 relative to the second opening 507. The inner diameter of the first opening 506 is larger than the inner diameter of the second opening 507. A step structure 508 is formed at the junction of the inner wall of the first opening 506 and the inner wall of the second opening 507. The step structure 508 can be formed by etching.

[0372] In some embodiments, reference Fig.21 , setting a second electrode may include:

[0373] The second electrode 230 is disposed on a side of the light emitting layer 220 away from the substrate layer 100 , so that the second electrode 230 is connected to an end of the auxiliary electrode 300 close to the pixel opening 501 , and the second electrode 230 is broken at the edge of the partition layer 700 .

[0374] In some embodiments, reference Fig.21 , setting up the isolation layer may include:

[0375] A partition film is disposed on a side of the pixel defining layer 500 away from the substrate layer 100;

[0376] The partition film is etched to obtain a partition layer 700, wherein at least part of the sidewall of the partition layer 700 in the thickness direction H includes a first sidewall segment 701 and a second sidewall segment 702, the first sidewall segment 701 is away from the substrate layer 100 relative to the second sidewall segment 702, the orthographic projection of the side surface of the partition layer 700 corresponding to the first sidewall segment 701 on the substrate layer 100 is a first projection, the orthographic projection of the side surface of the partition layer 700 corresponding to the second sidewall segment 702 on the substrate layer 100 is a second projection, and the first projection surrounds the second projection.

[0377] It should be noted that the step structure of the sidewalls formed by etching the sidewalls of the isolation layer 700 can be obtained by a specific etching method.

[0378] In some embodiments, reference Fig.23 , Fig.24 and Fig.25 , etching the partition film to obtain a partition layer, which may include:

[0379] The partition film is etched to obtain a partition layer 700, wherein the side wall of the partition layer 700 further includes a third side wall segment 705, the second side wall segment 702 is located between the first side wall segment 701 and the third side wall segment 705, and the third side wall segment 705 is closer to the substrate layer 100 relative to the second side wall segment 702; the orthographic projection of the side surface of the partition layer 700 corresponding to the third side wall segment 705 on the substrate layer 100 is the third projection, and the first projection surrounds the third projection; at least two of the first side wall segment 701, the second side wall segment 702 and the third side wall segment 705 are located on the side wall of the partition layer 700 away from the pixel opening 501.

[0380] For example, Fig.23 As shown, the first side wall segment 701 , the second side wall segment 702 and the third side wall segment 705 are all disposed on the side wall of the partition layer 700 facing the pixel opening 501 .

[0381] For example, Fig.23 As shown, the first side wall segment 701, the second side wall segment 702 and the third side wall can form a rectangular groove-shaped step difference structure.

[0382] In some examples, Fig.24 A schematic cross-sectional structure diagram of another display panel along C1-C2 provided in an embodiment of the present application. Fig.24 As shown, the first side wall segment 701 , the second side wall segment 702 and the third side wall are all arranged on the side of the partition layer 700 away from the pixel opening 501 .

[0383] In some examples, Fig.25 This is a schematic cross-sectional structure diagram of a display panel along C1-C2 provided in an embodiment of the present application. Fig.25 As shown, the first side wall segment 701, the second side wall segment 702 and the third side wall can form a trapezoidal groove-shaped step difference structure, that is, the side wall of the isolation layer 700 in the thickness direction H has a trapezoidal groove 706, each auxiliary electrode 300 can correspond to two side walls with trapezoidal grooves 706, and the two side walls with trapezoidal grooves 706 can be arranged opposite to each other, and the notches of the two trapezoidal grooves 706 are arranged opposite to each other.

[0384] In some embodiments, reference Fig. 27, the partition film is etched to obtain a partition layer 700, wherein a third groove 707 is provided on a side of the partition layer 700 away from the substrate layer 100, and in the direction of a line connecting two adjacent pixel openings 501, an inner diameter of an end of the third groove 707 away from the substrate layer 100 is smaller than an inner diameter of an end of the third groove close to the substrate layer 100.

[0385] In some embodiments, reference Fig.15 , etching the side of the pixel defining layer away from the substrate layer, may also include:

[0386] The side of the pixel definition layer 500 away from the substrate layer 100 is etched to obtain a second groove 504 . The second groove 504 is disposed between the pixel opening 501 and the isolation layer 700 . The inner wall of the second groove 504 is connected to the side wall of the isolation layer 700 in the thickness direction H.

[0387] like Fig.15 As shown, the orthographic projection of the second groove 504 on the substrate layer 100 surrounds the orthographic projection of the pixel opening 501 on the substrate layer 100. The dimension of the second groove 504 in the direction from the partition layer 700 to the pixel opening 501 is a first dimension L8, the first dimension L8 is greater than or equal to the step difference of the side wall of the partition layer 700 in the thickness direction H, the step difference of the side wall of the partition layer 700 in the thickness direction H is a second dimension L9, L8>L9, the diameter of the second groove 504 can be increased to be greater than the step difference of the side wall of the partition layer 700, and the partition effect on the light-emitting layer 220 can be further enhanced.

[0388] In some examples, such as Fig.15 As shown, a portion of the first inorganic packaging layer 810 is disposed in the second groove 504 .

[0389] In some embodiments, reference Fig.16 , etching the side of the pixel defining layer away from the substrate layer, may also include:

[0390] Etching the side of the pixel definition layer 500 away from the substrate layer 100 to obtain a fourth groove 505, wherein the fourth groove 505 is arranged between adjacent pixel openings 501;

[0391] Set up the isolation layer, including:

[0392] A partition film is disposed on a side of the pixel defining layer 500 away from the substrate layer 100;

[0393] The partition film is etched to obtain a partition layer 700 , wherein the partition layer 700 includes a third opening 730 , the third opening 730 penetrates the partition layer 700 , and the orthographic projection of the third opening 730 on the substrate layer 100 covers the orthographic projection of the fourth groove 505 on the substrate layer 100 .

[0394] like Fig.16 As shown, the inner wall of the fourth groove 505 of the pixel defining layer 500 can be connected to the inner wall of the third opening 730 of the isolation layer 700 , and the fourth groove 505 can be connected to the third opening 730 to form a film layer depression on the side away from the substrate layer 100 , and the film layer depression can be used to isolate the light-emitting layer 220 .

[0395] For example, Fig.16 The diameter of the fourth groove 505 at one end close to the substrate layer 100 is larger than the diameter at one end away from the substrate layer 100. The inner diameter of the third opening 730 can be the same as the inner diameter of the fourth groove 505, and the partition layer 700 provided with the third opening 730 can be used as an etching mask pattern of the fourth groove 505 to reduce the process flow.

[0396] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0397] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0398] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0399] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that: include: substrate layer; A plurality of light emitting devices are arranged on one side of the substrate layer; The light emitting device comprises a first electrode, a light emitting layer and a second electrode, wherein the light emitting layer is arranged between the first electrode and the second electrode; a plurality of auxiliary electrodes, wherein the second electrode is electrically connected to at least one of the auxiliary electrodes; The auxiliary signal line is electrically connected to at least two of the auxiliary electrodes.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the auxiliary electrode on the substrate layer at least partially surrounds the orthographic projection of the second electrode on the substrate layer; and / or, The orthographic projection of the auxiliary electrode on the substrate layer at least partially surrounds the orthographic projection of the first electrode on the substrate layer; and / or, The orthographic projection of the auxiliary electrode on the substrate layer does not overlap with the orthographic projection of the second electrode on the substrate layer; and / or, The orthographic projection of the auxiliary electrode on the substrate layer has no overlap with the orthographic projection of the first electrode on the substrate layer, or the orthographic projection of the auxiliary electrode on the substrate layer partially overlaps with the orthographic projection of the first electrode on the substrate layer.

3. The display panel according to claim 1, characterized in that: Also includes: A plurality of pixel units arranged in an array, wherein the pixel units include a plurality of the light-emitting devices; The auxiliary electrodes corresponding to the pixel units in the same row are electrically connected to the same auxiliary signal line; and / or, The auxiliary electrodes corresponding to the pixel units in the same column are electrically connected to the same auxiliary signal line; and / or, The auxiliary electrodes corresponding to the light emitting devices in the same row are electrically connected to the same auxiliary signal line; and / or, The auxiliary electrodes corresponding to the light emitting devices in the same column are electrically connected to the same auxiliary signal line; The direction of the rows intersects with the direction of the columns.

4. The display panel according to claim 3, characterized in that: The auxiliary signal line is arranged between the pixel units in adjacent rows, and / or, the auxiliary signal line is arranged between the pixel units in adjacent columns; and / or, The auxiliary signal line is disposed between the light emitting devices in adjacent rows, and / or the auxiliary signal line is disposed between the light emitting devices in adjacent columns.

5. The display panel according to claim 1, characterized in that: Also includes: A pixel defining layer, wherein the pixel defining layer and the light emitting device are arranged on the same side of the substrate layer; The pixel defining layer comprises a pixel opening and a first groove, wherein the pixel opening is used to expose at least a portion of the first electrode; The notch of the first groove is located at a side of the pixel defining layer away from the substrate layer, and the first groove is located between adjacent pixel openings; The light emitting layer is disposed at the pixel opening, and the second electrode is electrically connected to the auxiliary electrode through the first groove.

6. The display panel according to claim 5, characterized in that: The first groove is used to break the light-emitting layer at the edge of the first groove; The first groove is used to electrically connect at least a portion of the side wall of the auxiliary electrode in the thickness direction to the second electrode, and the thickness direction is a direction perpendicular to the plane where the substrate layer is located.

7. The display panel according to claim 5, characterized in that: The pixel defining layer includes a via hole, the via hole penetrates the pixel defining layer in a thickness direction, the via hole is located between the first groove and the pixel opening, and the auxiliary electrode is electrically connected to the auxiliary signal line through the via hole.

8. The display panel according to claim 5, characterized in that: At least a portion of an end surface of the auxiliary electrode close to the first groove is connected to at least a portion of an end surface of the first groove close to the auxiliary electrode.

9. The display panel according to claim 8, characterized in that: At least a portion of an end surface of the auxiliary electrode close to the first groove is flush with at least a portion of an end surface of the first groove close to the auxiliary electrode.

10. The display panel according to claim 5, characterized in that: A first distance is between the surface of the auxiliary electrode away from the substrate layer and the substrate layer, a second distance is between the bottom of the first groove and the substrate layer, and the first distance is greater than the second distance.

11. The display panel according to claim 10, characterized in that: The difference between the second distance and the first distance is a third distance, the depth of the first groove in the thickness direction of the pixel defining layer is a fourth distance, and the third distance is greater than the fourth distance.

12. The display panel according to claim 5, characterized in that: Also includes: A driving layer, disposed between the substrate layer and the light-emitting device, the driving layer comprising a pixel driving circuit, and the pixel driving circuit is electrically connected to the first electrode of the light-emitting device; The pixel driving circuit comprises a plurality of conductive layers, and the auxiliary signal line is arranged in the same layer as at least one of the conductive layers; and / or, The auxiliary signal line is arranged in the same layer as the first electrode.

13. The display panel according to claim 1, characterized in that: Also includes: A pixel defining layer, wherein the pixel defining layer and the light emitting device are arranged on the same side of the substrate layer; The pixel defining layer comprises a pixel opening and a via hole, wherein the pixel opening and the via hole penetrate the pixel defining layer in a thickness direction, wherein the thickness direction is a direction perpendicular to the plane where the substrate layer is located, and the via hole is located between adjacent pixel openings; The light emitting layer is disposed at the pixel opening, and the auxiliary electrode is electrically connected to the auxiliary signal line through the via hole; The pixel opening includes a first opening and a second opening, the first opening is connected with the second opening to form the pixel opening, and the first opening is farther away from the substrate layer than the second opening; The inner diameter of the first opening is greater than the inner diameter of the second opening, and a step structure is formed at the junction of the inner wall of the first opening and the inner wall of the second opening; One end of the auxiliary electrode close to the pixel opening is connected to the step structure, and the second electrode is connected to one end of the auxiliary electrode close to the pixel opening.

14. The display panel according to claim 13, characterized in that: One end of the auxiliary electrode close to the pixel opening is disposed on at least a portion of the inner wall of the first opening, and the second electrode is connected to the auxiliary electrode on the inner wall of the first opening.

15. The display panel according to claim 7 or 13, characterized in that: The second electrodes of two adjacent light-emitting devices are both electrically connected to the auxiliary signal line between the two adjacent light-emitting devices, the direction in which one of the two adjacent light-emitting devices points to the other is a first direction, and the connection line of the via holes corresponding to the auxiliary electrodes connected to the two adjacent light-emitting devices extends along a second direction, and the first direction is parallel to the second direction; and / or, The second electrode of the light-emitting device is correspondingly connected to at least two of the via holes.

16. The display panel according to any one of claims 7 to 14, characterized in that: Also includes: A partition layer is provided on a side of the pixel defining layer away from the substrate layer, the partition layer is used to break the light emitting layer at the edge of the partition layer, and the partition layer is used to break the second electrode at the edge of the partition layer; The orthographic projection of the partition layer on the substrate layer surrounds the orthographic projection of the pixel opening on the substrate layer.

17. The display panel according to claim 16, characterized in that: In a case where the pixel defining layer includes the first groove and the via hole, the via hole is located between the partition layer and the first groove.

18. The display panel according to claim 17, characterized in that: The orthographic projection of the isolation layer on the substrate layer at least partially surrounds the orthographic projection of the first groove on the substrate layer; and / or, The orthographic projection of the partition layer on the substrate layer at least partially surrounds the orthographic projection of the via hole on the substrate layer.

19. The display panel according to claim 16, characterized in that: In the case where the pixel defining layer includes the via holes, at least two via holes are arranged between two adjacent pixel openings; At least two of the via holes between two adjacent pixel openings are connected to the same auxiliary signal line; and / or, At least two of the via holes between two adjacent pixel openings are connected to different auxiliary electrodes, the area between at least two of the via holes between two adjacent pixel openings is a first area, the first area includes a first sub-area, the edge of the first area does not overlap with the edge of the first sub-area, the orthographic projection of the partition layer on the substrate layer does not overlap with the orthographic projection of the first sub-area on the substrate layer, and the orthographic projection of the auxiliary signal line on the substrate layer covers the orthographic projection of the first sub-area on the substrate layer; or, At least two of the via holes between two adjacent pixel openings are connected to the same auxiliary electrode.

20. The display panel according to claim 16, characterized in that: The area between the adjacent pixel openings is a second area, the second area includes a second sub-area, the edge of the second area does not overlap with the edge of the second sub-area, and the orthographic projection of the second sub-area on the substrate layer does not overlap with the orthographic projection of the via hole on the substrate layer; An orthographic projection of the partition layer on the substrate layer has no overlap with an orthographic projection of the second sub-region on the substrate layer.

21. The display panel according to claim 17, characterized in that: In the thickness direction, the thickness of the isolation layer is greater than the groove depth of the first groove; The orthographic projection of the partition layer on the substrate layer does not overlap with the orthographic projection of the auxiliary electrode on the substrate layer, or the orthographic projection of the partition layer on the substrate layer partially overlaps with the orthographic projection of the auxiliary electrode on the substrate layer.

22. The display panel according to claim 16, characterized in that: A first distance is defined between a surface of the auxiliary electrode away from the substrate layer and the substrate layer, a fifth distance is defined between a surface of the partition layer away from the substrate layer and the substrate layer, and the fifth distance is greater than the first distance.

23. The display panel according to claim 17, characterized in that: In the direction in which the pixel opening points to the first groove, the diameter of the first groove at an end away from the substrate layer is smaller than the diameter of the first groove at an end close to the substrate layer; and / or, In the direction in which the pixel opening points to the partition layer, a dimension of an end of the partition layer away from the substrate layer is larger than a dimension of an end of the partition layer close to the substrate layer.

24. The display panel according to claim 16, characterized in that: At least part of the sidewall of the partition layer in the thickness direction comprises a protruding structure, and the protruding structure is arranged at one end of the sidewall of the partition layer away from the substrate layer, and / or the protruding structure is arranged at one end of the sidewall of the partition layer close to the substrate layer.

25. The display panel according to claim 16, characterized in that: At least part of the sidewall of the partition layer in the thickness direction includes a first sidewall segment and a second sidewall segment, and the first sidewall segment is farther away from the substrate layer than the second sidewall segment; The orthographic projection of the side surface of the partition layer corresponding to the first side wall segment on the substrate layer is a first projection, and the orthographic projection of the side surface of the partition layer corresponding to the second side wall segment on the substrate layer is a second projection, and the first projection surrounds the second projection.

26. The display panel according to claim 25, characterized in that: The sidewall of the isolation layer further includes a third sidewall segment, the second sidewall segment is located between the first sidewall segment and the third sidewall segment, and the third sidewall segment is closer to the substrate layer than the second sidewall segment; The orthographic projection of the side surface of the isolation layer corresponding to the third side wall segment on the substrate layer is a third projection, and the first projection surrounds the third projection.

27. The display panel according to claim 26, characterized in that: At least two of the first sidewall segment, the second sidewall segment, and the third sidewall segment are located on a sidewall of the partition layer away from the pixel opening.

28. The display panel according to claim 25, characterized in that: The pixel definition layer further includes a second groove, and the second groove is arranged between the pixel opening and the isolation layer; The notch of the second groove is located at a side of the pixel defining layer away from the substrate layer, and the inner wall of the second groove is connected to the side wall of the partition layer in the thickness direction.

29. The display panel according to claim 28, characterized in that: The inner wall of the second groove is coplanar with the side wall of the isolation layer in the thickness direction; and / or, The ratio of the groove depth of the second groove in the thickness direction to the thickness of the pixel defining layer is in a range of 1 / 10 to 1 / 4; and / or, The depth of the second groove in the thickness direction is in the range of 0.1 to 0.5 micrometers; and / or, The dimension of the second groove in the direction from the partition layer to the pixel opening is a first dimension, and the first dimension is greater than or equal to the step difference of the side wall of the partition layer in the thickness direction.

30. The display panel according to claim 16, characterized in that: A third groove is provided on a side of the partition layer away from the substrate layer; In the direction of a line connecting two adjacent pixel openings, an inner diameter of an end of the third groove away from the substrate layer is smaller than an inner diameter of an end of the third groove close to the substrate layer.

31. The display panel according to any one of claims 1 to 4, characterized in that: Also includes: a pixel defining layer, wherein the pixel defining layer and the light emitting device are arranged on the same side of the substrate layer, the pixel defining layer comprises a pixel opening and a fourth groove, the notch of the fourth groove is located on a side of the pixel defining layer away from the substrate layer, the light emitting layer is arranged at the pixel opening, and the fourth groove is arranged between adjacent pixel openings; The partition layer is arranged on a side of the pixel defining layer away from the substrate layer, and the partition layer comprises a third opening, the third opening penetrates the partition layer, and the orthographic projection of the third opening on the substrate layer covers the orthographic projection of the fourth groove on the substrate layer.

32. The display panel according to claim 19, characterized in that: A side of the partition layer close to the substrate layer is connected to the auxiliary electrode.

33. The display panel according to claim 28, characterized in that: Also includes: An encapsulation layer, disposed on a side of the second electrode away from the substrate layer; The encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, the organic encapsulation layer is located between the first inorganic encapsulation layer and the second inorganic encapsulation layer, the first inorganic encapsulation layer is located between the second electrode and the organic encapsulation layer, and the thickness of the first inorganic encapsulation layer and the second inorganic encapsulation layer is less than the thickness of the organic encapsulation layer; The first inorganic encapsulation layer is disposed in the first groove; and / or, The first inorganic encapsulation layer is disposed in the second groove; and / or, The second sidewall segment is connected to the first inorganic layer.

34. The display panel according to any one of claims 1 to 14, characterized in that: The light-emitting device further comprises a plurality of light-emitting auxiliary layers, at least one of which is disposed on a side of the light-emitting layer away from the substrate layer, and / or at least one of which is disposed on a side of the light-emitting layer close to the substrate layer; The minimum distance between the edge of at least one effective light-emitting auxiliary layer and the auxiliary electrode is a sixth distance, the minimum distance between the edge of the effective light-emitting layer and the auxiliary electrode is a seventh distance, and the sixth distance is greater than the seventh distance; The effective luminescent auxiliary layer is the luminescent auxiliary layer used to assist the luminescent layer in luminescence, and the effective luminescent layer is the luminescent layer used for luminescence.

35. The display panel according to claim 34, characterized in that: The light-emitting auxiliary layer includes an electron transport layer, an electron generation layer, an electron blocking layer, a hole transport layer, a hole injection layer and a hole blocking layer; and / or, The auxiliary electrode includes at least one of titanium, aluminum, molybdenum, copper, indium tin oxide and silver; and / or, The auxiliary signal line includes at least one of titanium, aluminum, molybdenum, copper, indium tin oxide and silver; and / or, The light-emitting layer includes a red light-emitting layer, a blue light-emitting layer and a green light-emitting layer.

36. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 35.

37. A method for preparing a display panel, characterized in that: Used to prepare a display panel according to any one of claims 1 to 36, the preparation method comprising: Auxiliary signal lines, a plurality of light emitting devices and a plurality of auxiliary electrodes are respectively arranged on one side of the substrate layer; The light-emitting device comprises a first electrode, a light-emitting layer and a second electrode, the light-emitting layer is arranged between the first electrode and the second electrode, the second electrode is electrically connected to at least one auxiliary electrode, and the auxiliary signal line is electrically connected to at least two auxiliary electrodes.

38. The method for preparing a display panel according to claim 37, characterized in that: The light-emitting layer includes a first light-emitting layer, a second light-emitting layer and a third light-emitting layer, wherein the first light-emitting layer, the second light-emitting layer and the third light-emitting layer are respectively used to emit light of different colors, and the regions where the first light-emitting layer, the second light-emitting layer and the third light-emitting layer are located are respectively the third region, the fourth region and the fifth region; The plurality of light emitting devices are arranged on one side of the substrate layer, comprising: Disposing a plurality of the first electrodes on one side of the substrate layer; Disposing a pixel defining layer on a side of the first electrode away from the substrate layer; Etching a side of the pixel definition layer away from the substrate layer to obtain a plurality of pixel openings, wherein the pixel openings are used to expose at least a portion of the first electrode; Disposing the first light-emitting layer on a side of the pixel defining layer away from the substrate layer, so that the first light-emitting layer is electrically connected to the first electrode exposed by the pixel opening; The second electrode is disposed on a side of the first light-emitting layer away from the substrate layer, and the second electrode is electrically connected to the first light-emitting layer to form the light-emitting device in the third area; Disposing a packaging layer on a side of the second electrode away from the substrate layer; removing the encapsulation layer, the second electrode and the first light-emitting layer in the fourth region and the fifth region; Disposing the second light-emitting layer on a side of the pixel defining layer away from the substrate layer, so that the second light-emitting layer is electrically connected to the first electrode exposed by the pixel opening; The second electrode is disposed on a side of the second light-emitting layer away from the substrate layer, and the second electrode is electrically connected to the second light-emitting layer to form the light-emitting device in the fourth area; Disposing a packaging layer on a side of the second electrode away from the substrate layer; removing the encapsulation layer, the second electrode and the second light-emitting layer in the third region and the fifth region; The third light-emitting layer is disposed on a side of the pixel defining layer away from the substrate layer, so that the third light-emitting layer is electrically connected to the first electrode exposed by the pixel opening; The second electrode is disposed on a side of the third light-emitting layer away from the substrate layer, and the second electrode is electrically connected to the third light-emitting layer to form the light-emitting device in the fifth area; Disposing a packaging layer on a side of the second electrode away from the substrate layer; The encapsulation layer, the second electrode, and the third light emitting layer in the third region and the fourth region are removed.

39. The method for preparing a display panel according to claim 38, characterized in that: Setting the auxiliary signal line includes: Before arranging the plurality of the first electrodes on one side of the substrate layer, arranging the auxiliary signal line on one side of the substrate layer; and / or, Disposing a first electrode layer on one side of the substrate layer; Etching the first electrode layer to obtain a plurality of the first electrodes and the auxiliary signal lines; and / or, A driving layer is arranged between the substrate layer and the light-emitting device, and the driving layer includes a pixel driving circuit. In the case where the pixel driving circuit includes multiple conductive layers, multiple conductive layers are arranged on one side of the substrate layer, and the conductive layers are etched to obtain the pixel driving circuit and the auxiliary signal line.

40. The method for preparing a display panel according to claim 38, characterized in that: Etching a side of the pixel defining layer away from the substrate layer, comprising: Etching a side of the pixel definition layer away from the substrate layer to obtain a plurality of pixel openings and a plurality of via holes, wherein the via holes are located between adjacent pixel openings; Before providing the light-emitting layer, the method further comprises: An auxiliary electrode is disposed on a side of the pixel defining layer away from the substrate layer, so that the auxiliary electrode is electrically connected to the auxiliary signal line through the via hole; A partition layer is disposed on a side of the pixel defining layer away from the substrate layer, wherein an orthographic projection of the partition layer on the substrate layer does not overlap with an orthographic projection of the pixel opening on the substrate layer.

41. The method for preparing a display panel according to claim 40, characterized in that: Before or after providing the auxiliary electrode, the method further comprises: Etching a side of the pixel definition layer away from the substrate layer to obtain a plurality of first grooves, wherein the via holes are located between the first grooves and the pixel openings; The light-emitting layer is provided, comprising: The light-emitting layer is disposed on a side of the pixel defining layer away from the substrate layer, so that the light-emitting layer is electrically connected to the first electrode exposed by the pixel opening, and the light-emitting layer is broken at the edge of the first groove and the edge of the isolation layer; The second electrode is provided, comprising: The second electrode is disposed on a side of the light emitting layer away from the substrate layer, so that the second electrode is electrically connected to the auxiliary electrode through the first groove, and the second electrode is broken at an edge of the isolation layer.

42. The method for preparing a display panel according to claim 40, characterized in that: Etching a side of the pixel defining layer away from the substrate layer, comprising: Etching a side of the pixel definition layer away from the substrate layer to obtain a plurality of first openings and a plurality of second openings, wherein the first openings are connected with the second openings to form the pixel openings, the first openings are away from the substrate layer relative to the second openings, the inner diameter of the first openings is greater than the inner diameter of the second openings, and a step structure is formed at the junction of the inner wall of the first opening and the inner wall of the second opening; The auxiliary electrode is provided, comprising: The auxiliary electrode is arranged on a side of the pixel defining layer away from the substrate layer, so that the auxiliary electrode is electrically connected to the auxiliary signal line through the via hole, and one end of the auxiliary electrode close to the pixel opening is connected to the step structure; Providing the second electrode comprises: The second electrode is disposed on a side of the light emitting layer away from the substrate layer, so that the second electrode is connected to an end of the auxiliary electrode close to the pixel opening, and the second electrode is broken at an edge of the isolation layer.

43. The method for preparing a display panel according to claim 40, characterized in that: Setting the isolation layer includes: Disposing a partition film on a side of the pixel defining layer away from the substrate layer; Etching the partition film to obtain the partition layer, wherein at least part of the sidewall of the partition layer in the thickness direction includes a first sidewall segment and a second sidewall segment, the first sidewall segment is farther away from the substrate layer than the second sidewall segment, the orthographic projection of the side surface of the partition layer corresponding to the first sidewall segment on the substrate layer is a first projection, the orthographic projection of the side surface of the partition layer corresponding to the second sidewall segment on the substrate layer is a second projection, and the first projection surrounds the second projection; or, The partition film is etched to obtain the partition layer, wherein a third groove is provided on a side of the partition layer away from the substrate layer, and in the direction of a line connecting two adjacent pixel openings, an inner diameter of an end of the third groove away from the substrate layer is smaller than an inner diameter of an end of the third groove close to the substrate layer.

44. The method for preparing a display panel according to claim 43, characterized in that: The partition film is etched to obtain the partition layer, comprising: Etching the partition film to obtain the partition layer, wherein the sidewall of the partition layer further includes a third sidewall segment, the second sidewall segment is located between the first sidewall segment and the third sidewall segment, and the third sidewall segment is closer to the substrate layer than the second sidewall segment; The orthographic projection of the side surface of the partition layer corresponding to the third side wall segment on the substrate layer is a third projection, and the first projection surrounds the third projection; At least two of the first sidewall segment, the second sidewall segment, and the third sidewall segment are located on a sidewall of the partition layer away from the pixel opening.

45. The method for preparing a display panel according to claim 40, characterized in that: Etching a side of the pixel defining layer away from the substrate layer, further comprising: A side of the pixel definition layer away from the substrate layer is etched to obtain a second groove, wherein the second groove is arranged between the pixel opening and the isolation layer, and an inner wall of the second groove is connected to a side wall of the isolation layer in a thickness direction.

46. ​​The method for preparing a display panel according to claim 40, characterized in that: Etching a side of the pixel defining layer away from the substrate layer, further comprising: Etching a side of the pixel definition layer away from the substrate layer to obtain a fourth groove, wherein the fourth groove is arranged between adjacent pixel openings; Providing the isolation layer includes: Disposing a partition film on a side of the pixel defining layer away from the substrate layer; The isolation film is etched to obtain the isolation layer, wherein the isolation layer comprises a third opening, the third opening penetrates the isolation layer, and the orthographic projection of the third opening on the substrate layer covers the orthographic projection of the fourth groove on the substrate layer.

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