Display panel, display device and manufacturing method for display panel

Abstract

The present disclosure relates to the technical field of display. Disclosed are a display panel, a display device and a manufacturing method for a display panel, capable of alleviating the display abnormity caused by poor connection of a cathode of a display panel manufactured by a process in which no fine mask is used, and improving the display effect. The display panel comprises: a substrate layer; a plurality of light-emitting devices arranged on one side of the substrate layer, wherein each light-emitting device comprises a first electrode, a light-emitting layer and a second electrode, and 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 auxiliary electrode; and an auxiliary signal line electrically connected to at least two auxiliary electrodes.

Description

Display panel, display device, and method for manufacturing display panel

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent applications No. 202311437939.X and No. 202322942031.6 filed on October 31, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure 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

[0004] 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 use of FMM (Fine Metal Mask) can realize the graphical 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 FMM's graphic accuracy, 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 FMM-free process. However, the existing FMM-free process is prone to poor cathode connection, resulting in abnormal display of the display panel.

[0005] Summary of the Invention

[0006] 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 enhance display effects.

[0007] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0008] substrate layer;

[0009] A plurality of light-emitting devices are arranged on one side of the substrate layer;

[0010] The light emitting device includes a first electrode, a light emitting layer, and a second electrode, wherein the light emitting layer is disposed between the first electrode and the second electrode;

[0011] a plurality of auxiliary electrodes, wherein the second electrode is electrically connected to at least one of the auxiliary electrodes;

[0012] The auxiliary signal line is electrically connected to at least two of the auxiliary electrodes.

[0013] 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,

[0014] 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,

[0015] 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,

[0016] The orthographic projection of the auxiliary electrode on the substrate layer does not 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.

[0017] In some embodiments, the display panel further includes:

[0018] a plurality of pixel units arranged in an array, each pixel unit comprising a plurality of the light-emitting devices;

[0019] The auxiliary electrodes corresponding to the pixel units in the same row are electrically connected to the same auxiliary signal line; and / or,

[0020] The auxiliary electrodes corresponding to the pixel units in the same column are electrically connected to the same auxiliary signal line; and / or,

[0021] The auxiliary electrodes corresponding to the light-emitting devices in the same row are electrically connected to the same auxiliary signal line; and / or,

[0022] The auxiliary electrodes corresponding to the light-emitting devices in the same column are electrically connected to the same auxiliary signal line;

[0023] The direction of the rows intersects with the direction of the columns.

[0024] 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,

[0025] The auxiliary signal line is provided between the light emitting devices in adjacent rows, and / or the auxiliary signal line is provided between the light emitting devices in adjacent columns.

[0026] In some embodiments, the display panel further includes:

[0027] a pixel defining layer, wherein the pixel defining layer and the light-emitting device are arranged on the same side of the substrate layer;

[0028] The pixel defining layer includes a pixel opening and a first groove, wherein the pixel opening is used to expose at least a portion of the first electrode;

[0029] The notch of the first groove is located on a side of the pixel defining layer away from the substrate layer, and the first groove is located between adjacent pixel openings;

[0030] The light-emitting layer is disposed in the pixel opening, and the second electrode is electrically connected to the auxiliary electrode through the first groove.

[0031] In some embodiments, the first groove is used to break the light-emitting layer at the edge of the first groove;

[0032] The first groove is used to electrically connect at least a portion of a side wall of the auxiliary electrode in a thickness direction to the second electrode, where the thickness direction is a direction perpendicular to the plane where the substrate layer is located.

[0033] 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 and the auxiliary signal line are electrically connected through the via hole.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] In some embodiments, the display panel further includes:

[0039] a driving layer disposed between the substrate layer and the light-emitting device, the driving layer comprising a pixel driving circuit, the pixel driving circuit being electrically connected to the first electrode of the light-emitting device;

[0040] The pixel driving circuit includes multiple conductive layers, and the auxiliary signal line is provided on the same layer as at least one of the conductive layers; and / or,

[0041] The auxiliary signal line is provided in the same layer as the first electrode.

[0042] In some embodiments, the display panel further includes:

[0043] a pixel defining layer, wherein the pixel defining layer and the light-emitting device are arranged on the same side of the substrate layer;

[0044] The pixel defining layer includes 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;

[0045] The light emitting layer is provided at the pixel opening, and the auxiliary electrode is electrically connected to the auxiliary signal line through the via hole;

[0046] The pixel opening includes a first opening and a second opening, the first opening is connected to the second opening to form the pixel opening, and the first opening is farther away from the substrate layer than the second opening;

[0047] 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;

[0048] 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.

[0049] In some embodiments, the auxiliary electrode is disposed on at least a portion of an inner wall of the first opening at one end close to the pixel opening, and the second electrode is connected to the auxiliary electrode on the inner wall of the first opening.

[0050] 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 line connecting the vias 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,

[0051] The second electrode of the light-emitting device is correspondingly connected to at least two of the via holes.

[0052] In some embodiments, the display panel further includes:

[0053] a partition layer, disposed on a side of the pixel defining layer away from the substrate layer, the partition layer being used to break the light-emitting layer at an edge of the partition layer, and the partition layer being used to break the second electrode at an edge of the partition layer;

[0054] The orthographic projection of the partition layer on the substrate layer surrounds the orthographic projection of the pixel opening on the substrate layer.

[0055] 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.

[0056] 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,

[0057] The orthographic projection of the isolation layer on the substrate layer at least partially surrounds the orthographic projection of the via hole on the substrate layer.

[0058] In some embodiments, when the pixel defining layer includes the via hole, at least two via holes are provided between two adjacent pixel openings;

[0059] At least two of the via holes between two adjacent pixel openings are connected to the same auxiliary signal line; and / or,

[0060] 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,

[0061] At least two of the via holes between two adjacent pixel openings are connected to the same auxiliary electrode.

[0062] In some embodiments, an area between 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 hole on the substrate layer;

[0063] An orthographic projection of the partition layer on the substrate layer does not overlap with an orthographic projection of the second sub-region on the substrate layer.

[0064] In some embodiments, in the thickness direction, the thickness of the isolation layer is greater than the groove depth of the first groove;

[0065] 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.

[0066] 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.

[0067] 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

[0068] In a direction in which the pixel opening points to the partition layer, a dimension of the partition layer at an end away from the substrate layer is larger than a dimension of the partition layer at an end close to the substrate layer.

[0069] 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.

[0070] 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;

[0071] 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, and 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. The first projection surrounds the second projection.

[0072] 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;

[0073] 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.

[0074] 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.

[0075] In some embodiments, the pixel defining layer further includes a second groove, and the second groove is disposed between the pixel opening and the isolation layer;

[0076] The opening of the second groove is located on 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.

[0077] 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,

[0078] 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,

[0079] The depth of the second groove in the thickness direction is in the range of 0.1 to 0.5 μm; and / or,

[0080] The size of the second groove in the direction from the partition layer to the pixel opening is a first size, and the first size is greater than or equal to the step difference of the side wall of the partition layer in the thickness direction.

[0081] In some embodiments, a third groove is provided on a side of the isolation layer away from the substrate layer;

[0082] 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.

[0083] In some embodiments, the display panel further includes:

[0084] a pixel defining layer, the pixel defining layer and the light-emitting device being disposed on the same side of the substrate layer, the pixel defining layer comprising a pixel opening and a fourth groove, the notch of the fourth groove being located on a side of the pixel defining layer away from the substrate layer, the light-emitting layer being disposed in the pixel opening, and the fourth groove being disposed between adjacent pixel openings;

[0085] The isolation layer is arranged on a side of the pixel defining layer away from the substrate layer. The isolation layer includes a third opening that passes through the isolation layer. The orthographic projection of the third opening on the substrate layer covers the orthographic projection of the fourth groove on the substrate layer.

[0086] In some embodiments, a side of the isolation layer close to the substrate layer is connected to the auxiliary electrode.

[0087] In some embodiments, the display panel further includes:

[0088] an encapsulation layer, disposed on a side of the second electrode away from the substrate layer;

[0089] The encapsulation layer includes 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;

[0090] In the case where the pixel defining layer includes a first groove, the first inorganic encapsulation layer is disposed in the first groove; and / or,

[0091] The first inorganic encapsulation layer is disposed in the second groove; and / or,

[0092] The second sidewall segment is connected to the first inorganic layer.

[0093] In some embodiments, the light-emitting device further comprises a plurality of light-emitting auxiliary layers, at least one of the light-emitting auxiliary layers is disposed on a side of the light-emitting layer away from the substrate layer, and / or at least one of the light-emitting auxiliary layers is disposed on a side of the light-emitting layer close to the substrate layer;

[0094] 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;

[0095] 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 to emit light.

[0096] 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,

[0097] The auxiliary electrode includes at least one of titanium, aluminum, molybdenum, copper, indium tin oxide, and silver; and / or,

[0098] The auxiliary signal line includes at least one of titanium, aluminum, molybdenum, copper, indium tin oxide and silver; and / or,

[0099] The light-emitting layer includes a red light-emitting layer, a blue light-emitting layer and a green light-emitting layer.

[0100] According to a second aspect of the embodiments of the present application, a display device is provided, including:

[0101] The display panel as described in the first aspect.

[0102] A third aspect of the embodiments of the present application provides a method for manufacturing a display panel, for manufacturing the display panel according to the first aspect, the method comprising:

[0103] 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;

[0104] The light-emitting device includes 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.

[0105] In some embodiments, 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 configured 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 the third region, the fourth region, and the fifth region, respectively;

[0106] The plurality of light-emitting devices are provided on one side of the substrate layer, comprising:

[0107] Disposing a plurality of the first electrodes on one side of the substrate layer;

[0108] Disposing a pixel defining layer on a side of the first electrode away from the substrate layer;

[0109] Etching a side of the pixel defining 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;

[0110] 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;

[0111] Disposing the second electrode on a side of the first light-emitting layer away from the substrate layer, wherein the second electrode is electrically connected to the first light-emitting layer, so as to form the light-emitting device in the third area;

[0112] Disposing an encapsulation layer on a side of the second electrode away from the substrate layer;

[0113] removing the encapsulation layer, the second electrode, and the first light-emitting layer in the fourth region and the fifth region;

[0114] 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;

[0115] Disposing the second electrode on a side of the second light-emitting layer away from the substrate layer, wherein the second electrode is electrically connected to the second light-emitting layer, so as to form the light-emitting device in the fourth area;

[0116] Disposing an encapsulation layer on a side of the second electrode away from the substrate layer;

[0117] removing the encapsulation layer, the second electrode, and the second light-emitting layer in the third region and the fifth region;

[0118] Disposing the third light-emitting layer 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;

[0119] The second electrode is provided 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;

[0120] Disposing an encapsulation layer on a side of the second electrode away from the substrate layer;

[0121] The encapsulation layer, the second electrode, and the third light-emitting layer in the third region and the fourth region are removed.

[0122] In some embodiments, providing the auxiliary signal line includes:

[0123] Before arranging the plurality of first electrodes on one side of the substrate layer, arranging the auxiliary signal line on one side of the substrate layer;

[0124] and / or,

[0125] Disposing a first electrode layer on one side of the substrate layer;

[0126] etching the first electrode layer to obtain a plurality of the first electrodes and the auxiliary signal lines;

[0127] and / or,

[0128] 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 layers of the 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.

[0129] In some embodiments, etching a side of the pixel defining layer away from the substrate layer includes:

[0130] 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;

[0131] Before providing the light-emitting layer, the method further comprises:

[0132] Disposing an auxiliary electrode 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;

[0133] A partition layer is provided 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.

[0134] In some embodiments, before or after providing the auxiliary electrode, the method further includes:

[0135] 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;

[0136] Providing the light-emitting layer includes:

[0137] 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;

[0138] Providing the second electrode includes:

[0139] 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.

[0140] In some embodiments, etching a side of the pixel defining layer away from the substrate layer includes:

[0141] Etching a side of the pixel defining layer away from the substrate layer to form a plurality of first openings and a plurality of second openings, wherein the first openings are connected to the second openings to form the pixel openings, the first openings are farther away from the substrate layer than the second openings, the inner diameter of the first openings is larger 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;

[0142] Providing the auxiliary electrode comprises:

[0143] The 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, and one end of the auxiliary electrode close to the pixel opening is connected to the step structure;

[0144] Providing the second electrode includes:

[0145] 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.

[0146] In some embodiments, providing the barrier layer includes:

[0147] Disposing a partition film on a side of the pixel defining layer away from the substrate layer;

[0148] Etching the isolation film to obtain the isolation layer, wherein at least a portion of the sidewalls of the isolation 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, an orthographic projection of a side surface of the isolation layer corresponding to the first sidewall segment on the substrate layer is a first projection, an orthographic projection of a side surface of the isolation layer corresponding to the second sidewall segment on the substrate layer is a second projection, and the first projection surrounds the second projection;

[0149] or,

[0150] 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.

[0151] In some embodiments, etching the barrier film to obtain the barrier layer comprises:

[0152] Etching the isolation film to obtain the isolation layer, wherein 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;

[0153] The orthographic projection of the side surface of the partition layer corresponding to the third sidewall segment on the substrate layer is a third projection, and the first projection surrounds the third projection;

[0154] 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.

[0155] In some embodiments, etching the side of the pixel defining layer away from the substrate layer further comprises:

[0156] 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.

[0157] In some embodiments, etching the side of the pixel defining layer away from the substrate layer further comprises:

[0158] Etching a side of the pixel definition layer away from the substrate layer to form a fourth groove, wherein the fourth groove is arranged between adjacent pixel openings;

[0159] Providing the isolation layer includes:

[0160] Disposing a partition film on a side of the pixel defining layer away from the substrate layer;

[0161] The isolation film is etched to obtain the isolation layer, wherein the isolation layer includes 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.

[0162] The display panel provided in the embodiment of the present application electrically connects the second electrode through the auxiliary electrode by providing 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 display abnormalities caused by the second electrode set as a whole layer breaks along with the light-emitting layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0163] FIG1 is a schematic partial cross-sectional structural diagram of a display panel provided in an embodiment of the present application;

[0164] FIG2 is a schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0165] FIG3 is a schematic cross-sectional structural diagram of a display panel along line A1-A2 provided by an embodiment of the present application;

[0166] FIG4 is a schematic cross-sectional structural diagram of another display panel along line A1-A2 provided by an embodiment of the present application;

[0167] FIG5 is a schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0168] FIG6 is a schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0169] FIG7 is a schematic cross-sectional structural diagram of another display panel along line A1-A2 provided in an embodiment of the present application;

[0170] FIG8 is a schematic cross-sectional structural diagram of another display panel along A1-A2 provided by an embodiment of the present application;

[0171] FIG9 is a schematic cross-sectional structural diagram of a display panel along line A1-A2 provided by an embodiment of the present application;

[0172] FIG10 is a schematic cross-sectional structural diagram of another display panel along A1-A2 provided by an embodiment of the present application;

[0173] FIG11 is a schematic cross-sectional structural diagram of another display panel along line A1-A2 provided by an embodiment of the present application;

[0174] FIG12 is a schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0175] FIG13 is a schematic cross-sectional structural diagram of a display panel along B1-B2 according to an embodiment of the present application;

[0176] FIG14 is a schematic cross-sectional structural diagram of another display panel along B1-B2 provided in an embodiment of the present application;

[0177] FIG15 is a schematic cross-sectional structural diagram of another display panel along B1-B2 provided in an embodiment of the present application;

[0178] FIG16 is a schematic cross-sectional structural diagram of another display panel along B1-B2 according to an embodiment of the present application;

[0179] FIG17 is a schematic cross-sectional structural diagram of a display panel along B1-B2 according to an embodiment of the present application;

[0180] FIG18 is a schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0181] FIG19 is a schematic cross-sectional structural diagram of a display panel along C1-C2 according to an embodiment of the present application;

[0182] FIG20 is a schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0183]

[0184] FIG21 is a schematic cross-sectional structural diagram of another display panel along C1-C2 according to an embodiment of the present application;

[0185] FIG22 is a schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0186] FIG23 is a schematic cross-sectional structural diagram of another display panel along C1-C2 according to an embodiment of the present application;

[0187] FIG24 is a schematic cross-sectional structural diagram of another display panel along C1-C2 according to an embodiment of the present application;

[0188] FIG25 is a schematic cross-sectional structural diagram of a display panel along C1-C2 according to an embodiment of the present application;

[0189] FIG26 is a schematic cross-sectional structural diagram of another display panel along C1-C2 according to an embodiment of the present application;

[0190] FIG27 is a schematic cross-sectional structural diagram of another display panel along C1-C2 according to an embodiment of the present application;

[0191] FIG28 is a schematic cross-sectional structural diagram of another display panel along C1-C2 according to an embodiment of the present application;

[0192] FIG29 is a schematic cross-sectional structural diagram of a display panel along C1-C2 according to an embodiment of the present application;

[0193] FIG30 is a schematic structural diagram of a display device provided in an embodiment of the present application;

[0194] FIG31 is a schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0195] FIG32 is a schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0196] 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.

[0197] In this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. The term "two or more" includes two or more than two cases.

[0198] With the continuous development of display technology, the application of OLED display panels is becoming increasingly widespread. The mainstream method for mass production of OLED panels is vacuum evaporation. Using FMM, different colors of luminescent materials can be patterned and evaporated on the display panel. The fineness of the FMM pattern directly affects the resolution, display quality, and production yield of the OLED display panel. Due to the limitations of FMM patterning accuracy, the improvement of display panel resolution is limited. Therefore, to further improve the resolution of display panels, FMM-free processes can be used to produce light-emitting devices. However, existing FMM-free processes are prone to poor cathode connection, resulting in display anomalies in the display panel.

[0199] In view of this, 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 enhance display effects.

[0200] In a first aspect of an embodiment of the present application, a display panel is provided. FIG1 is a schematic partial cross-sectional view of the structure of a display panel provided by an embodiment of the present application. As shown in FIG1 , the display panel comprises: a substrate layer 100, a plurality of light-emitting devices 200, a plurality of auxiliary electrodes 300, and auxiliary signal lines 400. For example, the substrate layer 100 may be a rigid substrate such as glass, or a flexible substrate such as polyimide. The plurality of light-emitting devices 200 are disposed on one side of the substrate layer 100. The plurality of light-emitting devices 200 may be arranged in an array. The light-emitting devices include a first electrode 210, a light-emitting layer 220, and a second electrode 230. The light-emitting layer 220 is disposed between the first electrode 210 and the second electrode 230. The light-emitting layer 220 can emit light under the drive of the first electrode 210 and the second electrode 230. The first electrode 210 and the second electrode 230 can each receive a drive signal. The second electrode 230 is electrically connected to at least one auxiliary electrode 300. The second electrodes 230 of different light-emitting devices 200 may be independent of each other, and each second electrode 230 can 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 to display the picture of the display panel. For example, a light-emitting device 200 can serve as a sub-pixel of a display panel. Light-emitting devices that emit light of different colors can form pixel units, and the pixel units are repeatedly arranged in the display panel.

[0201] 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 only exemplary and is not specifically limited in the embodiments of the present application.

[0202] 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. The light-emitting device 200 shown in Figure 1 can be of any color, and the thickness direction H of the display panel is also perpendicular to the plane where the substrate layer 100 is located, and is also the thickness direction of the substrate layer 100.

[0203] 1 , the light emitting layer 220 is broken at the edge of the auxiliary electrode 300 , and the second electrode 230 is connected to the sidewall of the auxiliary electrode 300 in the thickness direction H, thereby achieving electrical connection between the auxiliary electrode 300 and the second electrode 230 .

[0204] For example, as shown in FIG1 , the auxiliary signal line 400 is provided in the same layer as the first electrode 210. The auxiliary signal line 400 and the first electrode 210 can be realized by etching a pattern obtained from the same conductive layer. Therefore, the provision of the auxiliary signal line 400 does not require an increase in the process flow and will not cause an increase in production costs.

[0205] It should be noted that FMMs are typically used to pattern the deposition of different colored luminescent materials on display panels. The pattern cutouts on the FMM allow the luminescent material to penetrate through the display panel during the deposition process, forming a patterned luminescent material. The fineness of the FMM pattern directly impacts the resolution, display quality, and production yield of OLED display panels. FMMs are fine metal masks, typically a thin layer of metal such as Invar (a low-expansion alloy), which can be a nickel-iron alloy, also known as Invar. FMM thickness can be up to 100 microns, and corresponding cutouts can be created based on the desired pattern of the deposited material. FMMs are consumable and expensive, and the deposition process results in significant material waste. Because the precision of the FMM cutouts directly impacts the arrangement of the deposited material pattern on the display panel, and thus the resolution, display panels fabricated using FMMs typically achieve a PPI (Pixels Per Inch) of around 400, making further improvement difficult. Therefore, the development of FMM-free processes for deposited material patterns is a major trend in the development 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. This eliminates the need for FMM, can reduce the distance between adjacent light-emitting devices, and improves the PPI of the display panel.

[0206] It should be noted that the interference of pixels 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.

[0207] The display panel provided in the embodiment of the present application electrically connects the second electrode 230 through the auxiliary electrode 300 by providing an auxiliary electrode 300 and an auxiliary signal line 400. 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. Then, 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 IR Drop 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, thereby avoiding display abnormalities caused by the second electrode 230 being broken along with the light-emitting layer 220.

[0208] 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. 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 can also include any signal lines, such as a gate signal line, a data signal line, etc.

[0209] For example, FIG2 is a schematic partial structural diagram of another display panel provided in an embodiment of the present application; FIG3 is a schematic cross-sectional structural diagram of a display panel provided in an embodiment of the present application along A1-A2. In combination with FIG2 and FIG3, FIG2 and FIG3 only illustrate a partial structure of the display panel. The display panel includes a pixel defining layer 500 and a driving layer 600. The driving layer 600 is arranged between the substrate layer 100 and the light-emitting device, that is, the driving layer 600 is arranged between the substrate layer 100 and the first electrode 210, and the pixel defining layer 500 is arranged on the side of the driving layer 600 away from the substrate layer 100. The pixel defining layer 500 includes a plurality of pixel openings 501. For example, referring to FIG2, 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 the red pixel opening r1, the blue light-emitting device may correspond to the blue pixel opening b1, and the green light-emitting device may correspond to the green pixel opening g1. 3 , the pixel opening 501 can be used to expose a portion of the first electrode 210. The first electrode 210 exposed by the pixel opening 501 can be used to electrically connect 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 disposed between the first electrode 210 and the light-emitting layer 220.

[0210] Exemplarily, the driving layer 600 may include a pixel driving circuit 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 have a circuit structure such as 2T1C, 7T1C, or 9T1C, where T represents TFT (thin-film transistor), C represents capacitance, and the numerical value represents the number of devices. The pixel driving circuit may include a driving transistor 610, the source or drain of which is electrically connected to the first electrode 210.

[0211] For example, referring to FIG3 , a driving transistor 610 includes a gate 511, an active layer 612, and source-drain electrodes 613. The source-drain electrodes 613 include a source and a drain, which can be insulated from each other in the same layer. The driving transistor 610 shown in FIG3 has a bottom-gate structure, i.e., the gate 611 is located on a side of the active layer 612 away from the source-drain electrodes 613.

[0212] For example, referring to FIG3 , the first electrode 210 can be formed before the pixel defining layer 500. In conjunction with FIG2 and FIG3 , 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. As shown in FIG2 , the dotted line surrounding the pixel opening 501 represents the electrode edge 211 of the first electrode 210, and the dotted circle indicates the first electrode via 601, through which the first electrode 210 and the driving transistor 610 can pass.

[0213] Exemplarily, referring to FIG. 2 , the dashed strip 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 .

[0214] For example, as shown in FIG2 , a red light-emitting device corresponding to a red pixel opening r1, a green light-emitting device corresponding to a green pixel opening g1, and a blue light-emitting device corresponding to a blue pixel opening b1 can form a pixel unit 101. The display panel can include a plurality of pixel units 101 arranged in an array, and each pixel unit 101 can include a plurality of light-emitting devices. An auxiliary signal line 400 is provided between pixel units 101 in adjacent rows, with the row direction X intersecting with the column direction Y. Adjacent blue pixel openings b1 are separated by green pixel openings g1 in the row direction X, and adjacent red pixel openings r1 are separated by blue pixel openings b1 in the row direction X. The auxiliary electrodes 300 corresponding to 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 first electrode vias 601 within the pixel unit 101 on the substrate layer 100 can all fall within the virtual frame of the pixel unit 101.

[0215] It should be noted that the red pixel opening r1, blue pixel opening b1, and green pixel opening g1 in the pixel unit 101 shown in FIG2 are arranged in a "pink" pattern. The shape and arrangement of the pixel openings 501 shown in FIG2 are merely illustrative and are not intended to be a specific limitation of this application.

[0216] 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.

[0217] 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 "co-layered" means that the two structures are formed simultaneously through the same patterning process, and the thickness of the film layer is the dimension of the film layer in the thickness direction H. Co-layering the auxiliary signal line 400 and the conductive layer can avoid the increase in process steps caused by the provision of the auxiliary signal line 400, thereby avoiding an increase in production costs.

[0218] Exemplarily, referring to FIG. 1 , the auxiliary signal line 400 is disposed in the same layer as the first electrode 210 .

[0219] Exemplarily, referring to FIG. 3 , the pixel driving circuit includes a conductive layer where the gate 611 is located and a conductive layer where the source-drain electrode 613 is located, and the auxiliary signal line 400 is provided in the same layer as the source-drain electrode 613 .

[0220] It should be noted that, as shown in Figure 3, 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 can include insulating layers of various materials, and the insulating layers can include silicon nitride, silicon oxide or organic materials, etc.

[0221] For example, FIG4 is a schematic cross-sectional structural diagram of another display panel provided by an embodiment of the present application along A1-A2. As shown in FIG4, 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 to 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 on the same layer as the gate signal line 614. The auxiliary signal line 400 and the auxiliary electrode 300 can be connected through an auxiliary connecting structure 401. The auxiliary connecting structure 401 can be arranged on the same layer as the connecting electrode 615.

[0222] For example, referring to FIG. 2 , the auxiliary electrode 300 is disposed on one side of the pixel opening 501 , and the auxiliary electrode 300 may be located between pixel units 101 in adjacent rows.

[0223] 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. For example, FIG5 is a schematic partial structural diagram of another display panel provided in an embodiment of the present application. As shown in FIG5 , 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 surrounding the first electrode 210 can enhance the electrical connection stability between the auxiliary electrode 210 and the second electrode 230.

[0224] In some examples, referring to Figures 1 and 5, the auxiliary signal line 400 can be arranged between adjacent rows of pixel units 101. For example, the auxiliary signal line 400 is distributed in parallel in the column direction Y, and the auxiliary signal line 400 is alternately arranged with the pixel unit rows. The pixel unit row can be a row of pixel units or multiple rows of pixel units.

[0225] In some examples, the auxiliary signal lines 400 may 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, which may be one column of pixel units or multiple columns of pixel units.

[0226] 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 multiple rows of sub-pixels.

[0227] 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.

[0228] For example, 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.

[0229] In some embodiments, the pixel defining layer 500 may further include a first groove and a via hole. 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. 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 breaks at the edge of the auxiliary electrode 300, and the light-emitting layer 220 breaks at the edge of the first groove, the auxiliary electrode 300 and the first groove can both serve to isolate the light-emitting layer 220, allowing the second electrode 230 to connect to the auxiliary electrode 300 at the location where the light-emitting layer 220 breaks, thereby achieving electrical connection.

[0230] In some examples, the breakage 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 continuous at the edge of the auxiliary electrode 300, as long as electrical connection between the second electrode 230 and the auxiliary electrode 300 is achieved.

[0231] 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 separate the light-emitting layer 220 and the second electrode 230. That is, the light-emitting layer 220 and the second electrode 230 can be broken at the edge of the partition layer to achieve film layer isolation. The provision of the partition layer allows the light-emitting layers 220 of different light-emitting devices 200 to be disconnected in a non-FMM process, thereby avoiding light leakage caused by interconnection between the light-emitting layers 220 of different light-emitting devices 200. Light leakage caused by the connection between the light-emitting layers of adjacent light-emitting devices 200 can cause pixel light mixing and reduced color purity.

[0232] In some examples, FIG6 is a schematic partial structural diagram of another display panel provided in an embodiment of the present application; FIG7 is a cross-sectional structural diagram along line A1-A2 of another display panel provided in an embodiment of the present application. In conjunction with FIG6 and FIG7 , the pixel defining layer 500 includes a pixel opening 501, a first groove 502, and a via 503. The display panel further includes a barrier layer 700, which is disposed on a side of the pixel defining layer 500 away from the substrate layer 100. The via 503 penetrates the pixel defining layer 500 in the thickness direction H, and the pixel opening 501 penetrates the pixel defining layer 500 in the thickness direction H. The first groove 502 is disposed on a side of the pixel defining layer 500 away from the substrate layer 100, i.e., the notch of the first groove 502 is located on the side of the pixel defining layer 500 away from the substrate layer 100. The first groove 502 and the via 503 are both disposed between the pixel opening 501 and the barrier layer 700, with the via 503 being located between the first groove 502 and the barrier layer 700. Part of the structure of the auxiliary electrode 300 in the thickness direction H is filled in the via 503 to realize the 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 realize the connection with the second electrode 230.

[0233] For example, referring to FIG. 6 , the partition layer 700 covers the areas other than the pixel opening 501 , the first groove 502 and the auxiliary electrode 300 , and the partition layer 700 can play a better role in partitioning the light-emitting layer.

[0234] In some embodiments, the auxiliary electrodes 300 corresponding 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 .

[0235] 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.

[0236] 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.

[0237] 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.

[0238] For example, referring to FIG6 , an auxiliary signal line 400 is provided between adjacent rows of pixel units 101, and the second electrodes of the light-emitting devices on both sides of the auxiliary signal line 400 in the column direction Y are both connected to the auxiliary signal line 400. Depending on the arrangement of the light-emitting devices within the pixel unit 101, the blue light-emitting device and the red light-emitting device within the same pixel unit 101 can be connected to the same auxiliary signal line 400. FIG6 is merely illustrative and does not constitute a specific limitation of the embodiments of the present application.

[0239] 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 of the light-emitting device and the auxiliary signal line.

[0240] 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.

[0241] For example, referring to FIG7 , the direction from the pixel opening 501 toward the first groove 502 is referred to as reference direction L. The direction from the pixel opening 501 toward the barrier layer 700 is also referred to as 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 a first diameter L1, and the diameter of the first groove 502 at the end closer to the substrate layer 100 is a second diameter L2. The first diameter L1 is smaller than the second diameter L2. The first groove 502 is narrower at the top and wider at the bottom, facilitating isolation of the edge of the first groove 502 by the light-emitting layer 220. The barrier layer 700 has a third outer diameter L3 at the end away from the substrate layer 100 and a fourth outer diameter L4 at the end closer to the substrate layer 100. The third outer diameter L3 is larger than the fourth outer diameter L4. The barrier layer 700 is wider at the top and narrower at the bottom, effectively isolating the light-emitting layer 220 and achieving light isolation between light-emitting devices.

[0242] In some embodiments, FIG8 is a cross-sectional structural diagram of another display panel provided by an embodiment of the present application along line A1-A2. Referring to FIG8 , 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, i.e., the upper surface of the auxiliary electrode 300 extends beyond the notch of the first groove 502, thereby ensuring that the edge of the auxiliary electrode 300 is isolated from the edge of the first groove 502.

[0243] In some examples, referring to Figures 7 and 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; and 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.

[0244] 8 , the difference between the second distance H2 and the first distance H1 is a third distance H3 , the depth of the first groove 502 in the thickness direction H of the pixel defining layer 500 is a fourth distance H4 , and the third distance H3 is greater than the fourth distance H4 , thus ensuring that the upper surface of the auxiliary electrode 300 extends beyond the opening of the first groove 502 .

[0245] 8 , in the thickness direction H, the thickness of the isolation layer 700 is greater than the groove depth of the first groove 502 , and the thickness of the isolation layer 700 is a first thickness H01 . The first thickness H01 is greater than the fourth distance H4 , which can ensure that the isolation layer 700 effectively isolates the light-emitting layer 220 and can even isolate the second electrode 230 .

[0246] Referring to Figure 8, the distance between the surface of the isolation 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 isolation layer 700 exceeds the upper surface of the auxiliary electrode 300, ensuring the film thickness step difference between the auxiliary electrode 300 and the isolation layer 700, so as to achieve a better effect of isolating the light-emitting layer.

[0247] In some examples, FIG9 is a schematic cross-sectional structural diagram of a display panel provided in an embodiment of the present application along line A1-A2. Referring to FIG9 , the light-emitting layer 220 is disposed in the pixel opening 501, and the second electrode 230 is also disposed in the pixel opening 501. The second electrode 230 and the auxiliary electrode 300 may be connected via a first groove 502. The first groove 502 may 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 may be to isolate the light-emitting layer 220, thereby disconnecting the light-emitting layer 220 between adjacent light-emitting devices 200 and preventing optical 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 breakage 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.

[0248] In some examples, the first groove 502 is used to electrically connect at least a portion of the sidewall of the auxiliary electrode 300 in the thickness direction H to the second electrode 230. At least a portion of the end surface of the auxiliary electrode 300 near the first groove 502 is connected to at least a portion of the end surface of the first groove 502 near the auxiliary electrode 300. At least a portion of the inner wall of the first groove 502 can be connected to at least a portion 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 better isolate the light-emitting layer 220. The light-emitting layer 220 can be broken at the connected section to expose at least a portion of the sidewall of the auxiliary electrode 300. The sidewall of the auxiliary electrode 300 exposed by the broken light-emitting layer 220 can be used to connect to the second electrode 230.

[0249] For example, referring to Figures 8 and 9, the inner wall of the first groove 502 near one end of the auxiliary electrode 300 is connected to the end face of the auxiliary electrode 300 near one end of the first groove 502. During the setting 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.

[0250] In some examples, as shown in Figures 8 and 9, 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.

[0251] In some examples, at least a portion of the end surface of the auxiliary electrode 300 near the first groove 502 is flush with at least a portion 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.

[0252] For example, as shown in FIG9 , the light-emitting layer 220 is broken at the edge of the barrier layer 700 , and the second electrode 230 is broken at the edge of the barrier 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 located in the red pixel opening r1, the green light-emitting layer g2 is partially located in the green pixel opening g1, and the blue light-emitting layer is partially located in 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 barrier layer 700, which can separate the red light-emitting layer r2 from the green light-emitting layer g2.

[0253] For example, as shown in FIG9 , 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 independently produced using different process flows, and the FFM can be removed to obtain patterned red light-emitting layer r2, green light-emitting layer g2, and blue light-emitting layer, thereby obtaining independent red, green, and blue light-emitting devices.

[0254] For example, in the display panel manufacturing process, a red light-emitting layer r2 and a second electrode 230 can be first formed as a whole layer. The red light-emitting layer r2 outside the area where the red light-emitting device is located can be etched away through an etching process to obtain a red light-emitting device. A green light-emitting layer g2 and a second electrode 230 can then be formed as a whole layer. The green light-emitting layer g2 outside the area where the green light-emitting device is located can be etched away through an etching process to obtain a green light-emitting device. A blue light-emitting layer and a second electrode 230 can then be formed as a whole layer. The blue light-emitting layer outside the area where the blue light-emitting device is located can be etched away through an etching process to obtain a blue light-emitting device. The boundary between adjacent light-emitting devices can fall on the boundary of the partition layer 700, and the boundary between adjacent light-emitting layers of different colors can fall on the edge of the partition layer 700 or fall within the area where the partition layer 700 is located. For example, referring to Figure 9, the second electrode 230 on the side of the partition layer 700 away from the substrate layer 100 is formed through different film formation processes and etching processes.

[0255] The display panel provided in the embodiments of the present application can isolate the light-emitting layer through the provision of a partition layer 700, thereby achieving independent arrangement of the light-emitting devices without the use of an FFM. Eliminating the FFM eliminates the need to consider the impact of the pattern accuracy on the FFM on the arrangement density of the light-emitting devices, thereby improving the resolution of the display panel. By providing an auxiliary electrode 300 and an auxiliary signal line 400 to provide a drive signal to the second electrode 230, it is ensured that the second electrode 230, isolated by the partition layer 700, stably receives the corresponding drive signal.

[0256] 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. For example, referring to Figures 5 and 9 , since the second electrode 230 is broken at the edge of the partition 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; and 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.

[0257] 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 can 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 does not overlap with the orthographic projection of the second electrode 230.

[0258] 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. For example, referring to FIG9 , a first groove 502 is provided between the auxiliary electrode 300 and the first electrode 210, or a partition layer 700 is provided between the auxiliary electrode 300 and the first electrode 210. 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 facilitates connection between the auxiliary electrode 300 and the auxiliary signal line 400. Regardless of which conductive layer the auxiliary signal line is disposed on, it will not short-circuit with the first electrode 210, maintaining a certain distance of insulation to avoid crosstalk between signals.

[0259] 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 can partially overlap with the projection of the first electrode 210. The partial overlap is allowed while ensuring that the auxiliary electrode 300 is insulated from the first electrode 210.

[0260] In some embodiments, the orthographic projection of the isolation layer 700 on the substrate layer 100 does not overlap with the orthographic projection of the auxiliary electrode 300 on the substrate layer 100. For example, referring to FIG9 , the orthographic projections of the isolation 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 isolation layer 700 can each independently function as a film barrier, without affecting each other.

[0261] In some embodiments, the light emitting device 200 further includes multiple light emitting auxiliary layers, at least one of which is disposed on a side of the light emitting layer 220 away from the substrate layer 100 . At least one light emitting auxiliary layer is disposed on a side of the light emitting layer 220 close to the substrate layer 100 .

[0262] It should be noted that due to the provision of the first groove 502 and the partition layer 700, the light-emitting layer 220 and the light-assisted layer are separated. In this case, the light-emitting layer 220 corresponding to the effective light-emitting area can serve as the effective light-emitting layer. Alternatively, 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 the effective light-emitting layer. The separated 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 ineffective light-emitting layer. The effective light-emitting layer is the light-emitting layer used for emitting light. Similarly, the portion of the light-assisted layer connected to the effective light-emitting layer can serve as the effective light-emitting auxiliary layer. The effective light-emitting auxiliary layer is the light-emitting auxiliary layer used to emit light from the light-assisted layer.

[0263] 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, with the electron generating layer being arranged close to the second electrode 230, the electron blocking layer being arranged close to the light-emitting layer, and the electron transport layer being 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, with the hole injection layer being arranged close to the first electrode 210, the hole blocking layer being arranged close to the light-emitting layer 220, and the hole transport layer being located between the hole injection layer and the hole blocking layer.

[0264] For example, Figure 10 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present application along line A1-A2. As shown in Figure 10, 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.

[0265] In some embodiments, the minimum distance between the edge of at least one effective light-emitting auxiliary layer and the auxiliary electrode 300 is a sixth distance, the minimum distance between the edge of the effective light-emitting layer and the auxiliary electrode 300 is a seventh distance, and the sixth distance is greater than the seventh distance. The edge of the effective light-emitting auxiliary layer is recessed relative to the edge of the effective light-emitting layer to reduce signal interference from the auxiliary electrode 300 on the light-emitting auxiliary layer. For example, the hole injection layer is sensitive to electrical signals and is easily interfered with by electrical signals from the auxiliary electrode 300. Therefore, the hole injection layer can be positioned away from the auxiliary electrode 300 relative to the light-emitting layer 220. The recessed edge of the light-emitting auxiliary layer relative to the edge of the light-emitting layer can be set differently based on the material properties.

[0266] Exemplarily, with reference to FIG10 , the first light-emitting auxiliary layer 240 and the second light-emitting auxiliary layer 250 can both 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, and this 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.

[0267] For example, as shown in FIG10 , the first light-emitting auxiliary layer 240 and the second light-emitting auxiliary layer 250 are both directly and 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.

[0268] In some embodiments, at least a portion of the sidewall of the isolation layer 700 in the thickness direction H includes a first sidewall segment and a second sidewall segment, with the first sidewall segment being farther away from the substrate layer 100 than the second sidewall segment. The orthographic projection of the side surface of the isolation 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 isolation layer 700 corresponding to the second sidewall segment on the substrate layer is the second projection, with the first projection surrounding the second projection. The first projection and the second projection can be lines, and if the first projection surrounds the second projection, this means that the second sidewall segment is indented relative to the first sidewall segment, i.e., the isolation layer 700 is wider at the top and narrower at the bottom. It should be noted that in the embodiments of the present application, "up" refers to a direction away from the substrate layer 100, and "down" refers to a direction toward the substrate layer 100.

[0269] 11 is a schematic cross-sectional view of another display panel along line A1-A2 provided by an embodiment of the present application. As shown in FIG11 , the second sidewall segment 702 of the partition layer 700 is retracted relative to the first sidewall segment 701 , thereby better isolating the light-emitting layer 220 .

[0270] 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 can protect the second electrode 230, the light-emitting layer 220, and the first electrode 210.

[0271] In some examples, as shown in FIG11 , an encapsulation layer 800 is disposed on a side of the second electrode 230 away from the substrate layer 100. 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. 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 is less than the thickness of the organic encapsulation layer 820. The organic encapsulation layer 820 may be prepared using an IJP (inkjet printing) process, and the first inorganic encapsulation layer 810 and the second inorganic encapsulation layer 830 may be prepared using a conventional chemical vapor deposition process.

[0272] In some examples, as shown in FIG11 , during the fabrication of a red light-emitting device, the first inorganic encapsulation layer 810 can be fabricated after the second electrode 230. Prior to fabricating a green light-emitting device, the first inorganic encapsulation layer 810 can be etched away in the corresponding region. During the etching process, the second electrode 230 of the red light-emitting device can be protected by the first inorganic encapsulation layer 810. After all light-emitting devices are fabricated, the organic encapsulation layer 820 and the second inorganic encapsulation layer 830 are then disposed.

[0273] In some examples, as shown in FIG11 , 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 barrier layer 700 may be filled with the first inorganic encapsulation layer 810, the gap between the broken second electrode 230 and the sidewall of the barrier layer 700 may be filled with the first inorganic encapsulation layer 810, and the gap between the broken second electrode 230 and the sidewall of the barrier 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.

[0274] In some examples, Figure 12 is a schematic partial structural diagram of another display panel provided by an embodiment of the present application. Figure 12 shows a schematic partial top view of the display panel on the side where the encapsulation layer is located; Figure 13 is a schematic cross-sectional structural diagram of a display panel along B1-B2 provided by an embodiment of the present application. As shown in Figure 12, the boundary 703 of the partition layer 700 surrounds the pixel opening 501. As shown in Figure 13, 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 arranged at one end of the sidewall of the partition layer 700 away from the substrate layer 100. In combination with Figures 11 and 13, the protruding surface of the protruding structure 704 can serve as the first sidewall segment 701, and the setting of the protruding structure 704 can achieve a setting in which the side of the partition layer 700 is wide at the top and narrow at the bottom.

[0275] For example, as shown in FIG12 , 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 one auxiliary signal line 400, and the light-emitting devices are connected to the auxiliary signal lines 400 in a one-to-one correspondence.

[0276] 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 .

[0277] In some embodiments, the pixel defining layer 500 further includes a second groove disposed between the pixel opening 501 and the isolation layer 700 . The second groove has an opening located on a side of the pixel defining layer 500 away from the substrate layer 100 , and an inner wall of the second groove is connected to a sidewall of the isolation layer 700 in the thickness direction H. The provision of the second groove can increase the step difference between the isolation layer 700 and the pixel defining layer 500 , thereby enhancing the isolation effect on the light-emitting layer 220 .

[0278] In some examples, Figure 14 is a schematic cross-sectional structural diagram of another display panel provided in an embodiment of the present application along line B1-B2. As shown in Figure 14, the second groove 504 is provided on a side of the pixel defining layer 500 away from the substrate layer 100. The inner wall of the second groove 504 is coplanar with the sidewall of the barrier layer 700 in the thickness direction H. In conjunction with Figure 11, the inner wall of the second groove 504 on the side close to the barrier layer 700 can be connected to the second sidewall segment 702. The inner wall of the second groove 504 can extend the second sidewall segment 702, thereby enhancing the barrier effect of the light-emitting layer 220.

[0279] In some examples, as shown in FIG14 , the second groove 504 has a groove depth of an eighth distance H8 in the thickness direction H, and the pixel defining layer 500 has a thickness of a ninth distance H9 in the thickness direction H. The ratio of the eighth distance H8 to the ninth distance H9 can range from 1 / 10 to 1 / 4, for example, 1 / 5, 1 / 7, 1 / 8, or 1 / 9. For example, the groove depth of the second groove 504 in the thickness direction H can range from 0.1 to 0.5 microns, for example, 0.25, 0.3, 0.37, 0.45, or 0.47 microns.

[0280] In some examples, FIG15 is a schematic cross-sectional structural diagram of another display panel provided in an embodiment of the present application along line B1-B2. As shown in FIG15, 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, and the first dimension L8 is greater than or equal to the step difference of the sidewall of the partition layer 700 in the thickness direction H. The step difference of the sidewall of the partition layer 700 in the thickness direction H is a second dimension L9, and L8>L9. By increasing the diameter of the second groove 504 to be greater than the step difference of the sidewall of the partition layer 700, the partition effect on the light-emitting layer 220 can be further enhanced.

[0281] In some examples, as shown in FIG. 15 , a portion of the first inorganic encapsulation layer 810 is disposed in the second groove 504 .

[0282] In some embodiments, the pixel defining layer 500 may include a fourth groove, the notch of which is located on a 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 isolation layer 700 includes a third opening that penetrates the isolation layer 700, and the orthographic projection of the third opening on the substrate layer 100 overlaps 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 communicates with the fourth groove 505 to form a film recess, which can be used to isolate the light-emitting layer 220.

[0283] In some examples, Figure 16 is a schematic cross-sectional view of another display panel along line B1-B2 provided by embodiments of the present application. As shown in Figure 16, 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. The fourth groove 505 can communicate with the third opening 730 to form a film recess on the side away from the substrate layer 100. The film recess can be used to isolate the light-emitting layer 220.

[0284] For example, as shown in FIG16 , the diameter of the fourth groove 505 at the end closer to the substrate layer 100 is larger than the diameter at the end farther from the substrate layer 100. The inner diameter of the third opening 730 can be the same as that of the fourth groove 505. The isolation layer 700 provided with the third opening 730 can serve as an etching mask pattern for the fourth groove 505, thereby reducing the process flow.

[0285] 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 can further enhance the isolation effect on the light-emitting layer 220 .

[0286] 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.

[0287] In some examples, Figure 17 is a schematic cross-sectional view of a display panel along line B1-B2 provided by embodiments of the present application. As shown in Figure 17, the light-emitting layer 220 and the second electrode 230 are broken at the edge of the third opening 730. The provision of the fourth groove 505 can increase the depth of the third opening 730 in the thickness direction H, thereby enhancing the barrier effect. Portions of the light-emitting layer 220 and the second electrode 230 can be disposed within the connected third opening 730 and fourth groove 505. Portions of the first inorganic insulating layer 810 can also be disposed within the third opening 730.

[0288] In some embodiments, the second electrodes 230 of two adjacent light-emitting devices 200 are both 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 toward the other is a first direction. The line connecting the vias 503 corresponding to the auxiliary electrodes 300 connected to the two adjacent light-emitting devices 200 extends along a 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. In the first direction, at least one via 503 can be provided on each side of the light-emitting device 200. In adjacent pixel units, an auxiliary signal line 400 can be provided between two adjacent light-emitting devices 200 along the first direction.

[0289] In some examples, Figure 18 is a schematic partial structural diagram of a display panel provided in an embodiment of the present application; Figure 19 is a schematic cross-sectional structural diagram of a display panel along line C1-C2 provided in an embodiment of the present application; and Figure 20 is a schematic partial structural diagram of another display panel provided in an embodiment of the present application. In conjunction with Figures 18 to 20 , an auxiliary signal line 400 is provided between two adjacent rows of first electrodes 210 in the column direction Y. As shown in Figure 20 , each first electrode 210 is provided with an auxiliary signal line 400 on both sides in the column direction Y.

[0290] It should be noted that auxiliary signal lines 400 may also be provided between adjacent columns of first electrodes 210 , and the arrangement of the auxiliary signal lines 400 may be set according to different arrangements of light-emitting devices.

[0291] In some examples, at least two vias 503 between two adjacent pixel openings 501 are connected to the same auxiliary signal line 400. As shown in FIG18 , 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. The same light-emitting device is connected to two auxiliary electrodes 300, and the two auxiliary electrodes 300 corresponding to the same light-emitting device are located on either side of the first electrode 210. The auxiliary electrodes 300 on both sides of the auxiliary signal line 400 in the column direction Y are both connected to the auxiliary signal line 400.

[0292] 18 , 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 a one-to-two relationship, and the light-emitting devices are connected to the auxiliary signal lines 400 in a one-to-two relationship.

[0293] In some examples, as shown in Figures 18 and 19, the line connecting adjacent pixel openings 501 is parallel to the first direction D1, and the direction in which the first electrodes 210 point toward the auxiliary signal line 400 is parallel to the first direction D1. The line connecting adjacent first electrodes 210 in the same column extends along the second direction D2, which is parallel to the column direction Y and parallel to the first direction D1.

[0294] In some examples, as shown in FIG. 19 , two vias 503 are provided between adjacent first electrodes 210 . The two vias 503 correspond to the same auxiliary signal line 400 , and the two vias 503 are connected to two different auxiliary electrodes 300 .

[0295] In some embodiments, referring to Figure 19, the pixel opening 501 includes a first opening 506 and a second opening 507, and the first opening 506 and the second opening 507 are connected to form the pixel opening 501, and 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, 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; the step structure 508 can be formed by etching.

[0296] In some embodiments, FIG21 is a schematic cross-sectional view of another display panel provided in an embodiment of the present application along line C1-C2. As shown in FIG21, the end of the auxiliary electrode 300 near the pixel opening 501 is connected to the stepped structure 508, and the second electrode 230 is connected to the end of the auxiliary electrode 300 near the pixel opening 501. The end of the auxiliary electrode 300 near 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.

[0297] In some embodiments, as shown in FIG. 21 , 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 .

[0298] In some examples, FIG22 is a schematic partial structural diagram of another display panel provided in an embodiment of the present application. As shown in FIG21 and FIG22 , at least two vias 503 between two adjacent pixel openings 501 are connected to different auxiliary electrodes 300. The area between the at least two vias 503 between two adjacent pixel openings 501 is a first area 110. The first area includes a first sub-area 111. The edges of the first area 110 and the edges of the first sub-area 111 do not overlap. 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. 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. The at least two vias 503 between two adjacent pixel openings 501 are connected to the same auxiliary electrode 300.

[0299] In some examples, as shown in Figure 22, 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.

[0300] In some embodiments, Figure 23 is a schematic cross-sectional structure diagram of another display panel along C1-C2 provided in an embodiment of the present application. As shown in Figure 23, the side wall of the partition layer 700 in the thickness direction H also includes a third side wall segment 705, and the second side wall segment 702 is located between the first side wall segment 701 and the third side wall segment 705. The third side wall segment 705 is close to the substrate layer 100 relative to the second side wall segment 702; the side surface of the partition layer 700 corresponding to the third side wall segment 705 is projected on the substrate layer 100 as 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 partition layer 700. In the thickness direction H, the side wall of the partition layer 700 is wide on the upper and lower sides and narrow in the middle.

[0301] 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 .

[0302] Exemplarily, as shown in FIG. 23 , the first sidewall segment 701 , the second sidewall segment 702 , and the third sidewall segment 705 are all disposed on the sidewall of the partition layer 700 facing the pixel opening 501 .

[0303] For example, as shown in FIG23 , the first side wall segment 701 , the second side wall segment 702 and the third side wall may form a rectangular groove-shaped step structure.

[0304] In some examples, Figure 24 is a schematic cross-sectional view of another display panel along line C1-C2 provided in an embodiment of the present application. As shown in Figure 24 , the first sidewall segment 701 , the second sidewall segment 702 , and the third sidewall are all disposed on the side of the partition layer 700 facing away from the pixel opening 501 .

[0305] In some examples, Figure 25 is a schematic cross-sectional structure diagram of a display panel along line C1-C2 provided by an embodiment of the present application. As shown in Figure 25, the first sidewall segment 701, the second sidewall segment 702, and the third sidewall can form a stepped structure in the shape of a trapezoidal groove. That is, the sidewalls of the partition layer 700 in the thickness direction H have a trapezoidal groove 706. Each auxiliary electrode 300 can correspond to two sidewalls having trapezoidal grooves 706. The two sidewalls having trapezoidal grooves 706 can be arranged opposite each other, and the notches of the two trapezoidal grooves 706 are arranged opposite each other.

[0306] In some examples, Figure 26 is a schematic cross-sectional structural diagram of another display panel provided by an embodiment of the present application along line C1-C2. As shown in Figure 26, the cross-section of the barrier layer 700 is an inverted trapezoidal shape. The outer diameter of the barrier layer 700 at the end away from the substrate layer 100 is larger than the outer diameter of the barrier layer 700 at the end closer to the substrate layer 100. The sidewalls of the barrier layer 700 in the thickness direction H are planar sidewalls.

[0307] In some examples, Figure 27 is a schematic cross-sectional view of another display panel along line C1-C2 provided by embodiments of the present application. As shown in Figure 27, 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 third groove 707 on the side away from the substrate layer 100 is smaller than the inner diameter of the third groove 707 on the side closer to the substrate layer 100. The third groove 707 can be an inverted trapezoidal groove.

[0308] In some examples, as shown in FIG. 27 , a portion of the first inorganic encapsulation layer 810 is disposed in the third groove 707 .

[0309] In some embodiments, referring to FIGS. 21 and 23 to 27 , a side of the partition layer 700 close to the substrate layer 100 is connected to the auxiliary electrode 300 .

[0310] In some examples, the auxiliary electrode 300 provided in embodiments of the present application can include at least one of titanium, aluminum, molybdenum, copper, indium tin oxide, and silver. For example, the auxiliary electrode 300 can be a stacked structure of titanium-aluminum-titanium or molybdenum-aluminum-molybdenum metal films. The auxiliary electrode 300 can also be a single layer of conductive material. For example, in the case of an indium tin oxide-silver-indium tin oxide stack, the thickness of the indium tin oxide can range from 30 to 500 angstroms, and the thickness of the silver can range from 500 to 2000 angstroms, where 1 angstrom = 0.1 nanometer.

[0311] 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.

[0312] 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.

[0313] In some examples, Figure 28 is a schematic cross-sectional structure diagram of another display panel along line C1-C2 provided by an embodiment of the present application. As shown in Figure 28, two vias 503 are provided between two adjacent second electrodes 210. When the vias 503 are provided in a one-to-one correspondence with the auxiliary electrodes 300, the auxiliary signal line 400 can be provided on the same layer as the source-drain electrode 613.

[0314] In some examples, Figure 29 is a schematic cross-sectional structure diagram of a display panel along line C1-C2 provided in an embodiment of the present application. As shown in Figure 29, two vias 503 are provided between two adjacent second electrodes 210, and when the vias 503 are provided in a one-to-one correspondence with the auxiliary electrodes 300, 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 embodiments of the present application.

[0315] It should be noted that the structure of the driving transistor 610 shown in FIG29 is merely schematic and may also be a top-gate structure, which is not specifically limited in the embodiment of the present application.

[0316] In a second aspect of the present invention, a display device is provided. Figure 30 is a schematic structural diagram of a display device provided in an embodiment of the present invention. As shown in Figure 30 , the display device includes the display panel 1000 provided in the first aspect.

[0317] It should be noted that the display device may further include a control mainboard, a battery component, a protective shell and 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.

[0318] 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 do not make specific limitations.

[0319] A third aspect of the present invention provides a method for manufacturing a display panel, which is used to manufacture the display panel described in the first aspect. FIG31 is a schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present invention. As shown in FIG31 , the method for manufacturing a display panel includes:

[0320] S900: Arrange auxiliary signal lines, a plurality of light-emitting devices, and a plurality of auxiliary electrodes on one side of the substrate layer.

[0321] The light-emitting device includes 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. The auxiliary signal line is electrically connected to at least two auxiliary electrodes.

[0322] The display panel provided in the embodiment of the present application electrically connects the second electrode 230 through the auxiliary electrode 300 by providing an auxiliary electrode 300 and an auxiliary signal line 400. 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. Then, 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 IR Drop 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, thereby avoiding display abnormalities caused by the second electrode 230 being broken along with the light-emitting layer 220.

[0323] In some embodiments, FIG32 is a schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application. As shown in FIG32 , the light-emitting layer includes a first light-emitting layer 221, a second light-emitting layer 222, and a third light-emitting layer 223. The first light-emitting layer 221, the second light-emitting layer 222, and the third light-emitting layer 223 are respectively configured to emit light of different colors. The first light-emitting layer 221, the second light-emitting layer 222, and the third light-emitting layer 223 are located in the third region 130, the fourth region 140, and the fifth region 150, respectively. For example, 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.

[0324] A plurality of light emitting devices are provided on one side of the substrate layer, which may include:

[0325] S901: Disposing a plurality of first electrodes 210 on one side of the substrate layer 100;

[0326] A pixel defining layer 500 is disposed on a side of the first electrode 210 away from the substrate layer 100 ;

[0327] 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 .

[0328] 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 ;

[0329] A second electrode 230 is provided 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 . For example, the light-emitting device formed in the third region 130 may be a red light-emitting device.

[0330] An encapsulation layer is provided on a side of the second electrode 230 away from the substrate layer 100 ; the encapsulation layer in this step may be the first inorganic encapsulation layer 810 ;

[0331] 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.

[0332] 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 ;

[0333] A second electrode 230 is provided 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 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;

[0334] An encapsulation layer is provided 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 ;

[0335] 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.

[0336] 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 ;

[0337] A second electrode 230 is provided 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 to form a light-emitting device in the fifth region 150 , which may be a blue light-emitting device.

[0338] An encapsulation layer is provided on a side of the second electrode 230 away from the substrate layer 100; a first inorganic encapsulation layer 810 may be provided;

[0339] 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.

[0340] 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 provided.

[0341] In some embodiments, setting an auxiliary signal line may include:

[0342] Before disposing a plurality of first electrodes 210 on one side of the substrate layer 100, auxiliary signal lines 400 are disposed on one side of the substrate layer. For example, as shown in Figures 3 and 4, the auxiliary signal lines 400 and the first electrodes 210 are not on the same layer, but are disposed on the same layer as the conductive layer preceding the first electrodes 210. Therefore, the auxiliary signal lines 400 are disposed prior to the first electrodes 210. This same-layer configuration reduces the number of process steps and masks required for etching patterns, significantly reducing production costs.

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

[0344] A first electrode layer is provided on one side of the substrate layer 100;

[0345] The first electrode layer is etched to obtain a plurality of first electrodes 210 and auxiliary signal lines 400 .

[0346] Exemplarily, referring to FIG. 1 , the first electrode 210 and the auxiliary signal line 400 may be prepared in the same layer, and the preparation processes are synchronized.

[0347] In some embodiments, setting an auxiliary signal line may include:

[0348] 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.

[0349] In some embodiments, referring to FIG. 7 , etching a side of the pixel defining layer away from the substrate layer may include:

[0350] The side of the pixel definition 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 . The via holes 503 are located between adjacent pixel openings 501 .

[0351] Before setting up the luminous layer, also include:

[0352] 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 .

[0353] 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 .

[0354] 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.

[0355] In some embodiments, referring to FIG. 7 , before providing the auxiliary electrode, the following steps may be included:

[0356] A first groove 502 may also be formed 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 .

[0357] After setting up the auxiliary electrode, you can include:

[0358] 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.

[0359] For example, referring to FIG7 , the direction from the pixel opening 501 toward the first groove 502 is referred to as reference direction L. The direction from the pixel opening 501 toward the barrier layer 700 is also referred to as 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 a first diameter L1, and the diameter of the first groove 502 at the end closer to the substrate layer 100 is a second diameter L2. The first diameter L1 is smaller than the second diameter L2. The first groove 502 is narrower at the top and wider at the bottom, facilitating isolation of the edge of the first groove 502 by the light-emitting layer 220. The barrier layer 700 has a third outer diameter L3 at the end away from the substrate layer 100 and a fourth outer diameter L4 at the end closer to the substrate layer 100. The third outer diameter L3 is larger than the fourth outer diameter L4. The barrier layer 700 is wider at the top and narrower at the bottom, effectively isolating the light-emitting layer 220 and achieving light isolation between light-emitting devices.

[0360] In some embodiments, referring to FIG9 , providing a light-emitting layer may include:

[0361] The light-emitting layer 220 is disposed on the side of the pixel defining layer 500 away from the substrate 100 so as to be electrically connected to the first electrode 210 exposed by the pixel opening 501 . The light-emitting layer 220 is broken at the edge of the first groove 502 and at the edge of the isolation layer 700 .

[0362] Providing a second electrode may include:

[0363] 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 . The second electrode 230 is broken at the edge of the isolation layer 700 .

[0364] 8 and 9 , the inner wall of the first groove 502 near one end of the auxiliary electrode 300 is connected to the end face of the auxiliary electrode 300 near one end of 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. 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.

[0365] In some examples, as shown in Figures 8 and 9, 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.

[0366] In some embodiments, referring to FIG. 19 , etching a side of the pixel definition layer away from the substrate layer may include:

[0367] 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 larger 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.

[0368] Setting up auxiliary electrodes may include:

[0369] 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 . One end of the auxiliary electrode 300 close to the pixel opening 501 is connected to the step structure 508 .

[0370] 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 .

[0371] In some examples, at least two vias 503 between two adjacent pixel openings 501 are connected to the same auxiliary signal line 400. As shown in FIG18 , 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. The same light-emitting device is connected to two auxiliary electrodes 300, and the two auxiliary electrodes 300 corresponding to the same light-emitting device are located on either side of the first electrode 210. The auxiliary electrodes 300 on both sides of the auxiliary signal line 400 in the column direction Y are both connected to the auxiliary signal line 400.

[0372] 18 , 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 a one-to-two relationship, and the light-emitting devices are connected to the auxiliary signal lines 400 in a one-to-two relationship.

[0373] In some examples, as shown in Figures 18 and 19, the line connecting adjacent pixel openings 501 is parallel to the first direction D1, and the direction in which the first electrodes 210 point toward the auxiliary signal line 400 is parallel to the first direction D1. The line connecting adjacent first electrodes 210 in the same column extends along the second direction D2, which is parallel to the column direction Y and parallel to the first direction D1.

[0374] In some examples, as shown in FIG. 19 , two vias 503 are provided between adjacent first electrodes 210 . The two vias 503 correspond to the same auxiliary signal line 400 , and the two vias 503 are connected to two different auxiliary electrodes 300 .

[0375] In some embodiments, referring to Figure 19, the pixel opening 501 includes a first opening 506 and a second opening 507, and the first opening 506 and the second opening 507 are connected to form the pixel opening 501, and 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, 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; the step structure 508 can be formed by etching.

[0376] In some embodiments, referring to FIG. 21 , providing the second electrode may include:

[0377] A 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 .

[0378] In some embodiments, referring to FIG. 21 , providing a barrier layer may include:

[0379] A partition film is provided on a side of the pixel defining layer 500 away from the substrate layer 100;

[0380] The isolation film is etched to obtain an isolation layer 700, wherein at least a portion of the sidewall of the isolation 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 farther away from the substrate layer 100 than the second sidewall segment 702, the orthographic projection of the side surface of the isolation layer 700 corresponding to the first sidewall segment 701 on the substrate layer 100 is a first projection, and the orthographic projection of the side surface of the isolation 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.

[0381] It should be noted that etching the sidewalls of the isolation layer 700 to form the step structure of the sidewalls can be achieved through a specific etching method.

[0382] In some embodiments, referring to FIG. 23 , FIG. 24 , and FIG. 25 , etching the barrier film to obtain the barrier layer may include:

[0383] The partition film is etched to obtain a partition layer 700, wherein the sidewall of the partition layer 700 further includes a third sidewall segment 705, the second sidewall segment 702 is located between the first sidewall segment 701 and the third sidewall segment 705, and the third sidewall segment 705 is closer to the substrate layer 100 than the second sidewall segment 702; the orthographic projection of the side surface of the partition layer 700 corresponding to the third sidewall 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 sidewall segment 701, the second sidewall segment 702, and the third sidewall segment 705 are located on the sidewall of the partition layer 700 away from the pixel opening 501.

[0384] Exemplarily, as shown in FIG. 23 , the first sidewall segment 701 , the second sidewall segment 702 , and the third sidewall segment 705 are all disposed on the sidewall of the partition layer 700 facing the pixel opening 501 .

[0385] For example, as shown in FIG23 , the first side wall segment 701 , the second side wall segment 702 and the third side wall may form a rectangular groove-shaped step structure.

[0386] In some examples, Figure 24 is a schematic cross-sectional view of another display panel along line C1-C2 provided in an embodiment of the present application. As shown in Figure 24 , the first sidewall segment 701 , the second sidewall segment 702 , and the third sidewall are all disposed on the side of the partition layer 700 facing away from the pixel opening 501 .

[0387] In some examples, Figure 25 is a schematic cross-sectional structure diagram of a display panel along line C1-C2 provided by an embodiment of the present application. As shown in Figure 25, the first sidewall segment 701, the second sidewall segment 702, and the third sidewall can form a stepped structure in the shape of a trapezoidal groove. That is, the sidewalls of the partition layer 700 in the thickness direction H have a trapezoidal groove 706. Each auxiliary electrode 300 can correspond to two sidewalls having trapezoidal grooves 706. The two sidewalls having trapezoidal grooves 706 can be arranged opposite each other, and the notches of the two trapezoidal grooves 706 are arranged opposite each other.

[0388] In some embodiments, referring to Figure 27, the isolation film is etched to obtain an isolation layer 700, wherein a third groove 707 is provided on the side of the isolation layer 700 away from the substrate layer 100, and 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 close to the substrate layer 100.

[0389] In some embodiments, referring to FIG. 15 , etching the side of the pixel defining layer away from the substrate layer may further include:

[0390] 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.

[0391] As shown in FIG15 , 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 sidewall of the partition layer 700 in the thickness direction H. The step difference of the sidewall of the partition layer 700 in the thickness direction H is a second dimension L9. L8>L9. By increasing the diameter of the second groove 504 to be greater than the step difference of the sidewall of the partition layer 700, the partitioning effect on the light-emitting layer 220 can be further enhanced.

[0392] In some examples, as shown in FIG. 15 , a portion of the first inorganic encapsulation layer 810 is disposed in the second groove 504 .

[0393] In some embodiments, referring to FIG. 16 , etching the side of the pixel defining layer away from the substrate layer may further include:

[0394] Etching the side of the pixel definition layer 500 away from the substrate layer 100 to form a fourth groove 505, wherein the fourth groove 505 is disposed between adjacent pixel openings 501;

[0395] Set up the isolation layer, including:

[0396] A partition film is provided on a side of the pixel defining layer 500 away from the substrate layer 100;

[0397] The isolation film is etched to obtain an isolation layer 700 , wherein the isolation layer 700 includes a third opening 730 that penetrates the isolation layer 700 , and an orthographic projection of the third opening 730 on the substrate layer 100 covers an orthographic projection of the fourth groove 505 on the substrate layer 100 .

[0398] As shown in Figure 16, 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 recess on the side away from the substrate layer 100, and the film layer recess can be used to isolate the light-emitting layer 220.

[0399] For example, as shown in FIG16 , the diameter of the fourth groove 505 at the end closer to the substrate layer 100 is larger than the diameter at the end farther from the substrate layer 100. The inner diameter of the third opening 730 can be the same as that of the fourth groove 505. The isolation layer 700 provided with the third opening 730 can serve as an etching mask pattern for the fourth groove 505, thereby reducing the process flow.

[0400] It should be noted that the display device provided in the embodiments of the present application may include a smart phone, a tablet computer, a laptop computer, a television, and a smart wearable display device, etc. The smart wearable display device may include a smart watch, etc., and the embodiments of the present application do not make specific limitations.

[0401] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0402] 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.

[0403] 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 concepts. 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.

[0404] Obviously, those skilled in the art may make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if such changes and modifications fall within the scope of the claims of this specification and their equivalents, this specification is intended to include such changes and modifications.

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 a first groove and a 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 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; In the case where the pixel defining layer includes a first groove, 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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