Display panel, manufacturing method thereof and display device

Abstract

The invention provides a display panel, a manufacturing method thereof and a display device, and belongs to the technical field of display. A display panel includes: a substrate; the anode wires are located on the substrate and extend in the first direction; the insulating layer is positioned on one side, far away from the substrate, of the anode wire and comprises a via hole for exposing the anode wire; the auxiliary cathodes and the anodes are located on the side, away from the substrate, of the insulating layer, the auxiliary cathodes extend in the second direction, the second direction intersects with the first direction, the orthographic projection of the anodes on the substrate and the orthographic projection of the auxiliary cathodes on the substrate are not overlapped, and the anodes are connected with the anode wires through via holes; the pixel defining layer is positioned on one side, far away from the substrate, of the anode and comprises a first opening for defining a pixel region; an organic light-emitting layer located in the pixel region; and the cathode is positioned on one side, far away from the substrate, of the organic light-emitting layer and is electrically connected with the auxiliary cathode. According to the invention, large-size display can be realized.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) display devices have been listed as the next generation display technology with great development prospects due to their advantages such as thinness, lightness, wide viewing angle, active light emission, continuously adjustable light color, low cost, fast response speed, low energy consumption, low driving voltage, wide operating temperature range, simple production process, high light emission efficiency and flexible display. Summary of the invention

[0003] Embodiments of the present disclosure provide a display panel and a manufacturing method thereof, and a display device, which can realize large-size display.

[0004] To solve the above technical problems, the embodiments of the present disclosure provide the following technical solutions:

[0005] In one aspect, a display panel is provided, comprising:

[0006] substrate;

[0007] a plurality of anode wirings located on the substrate, the anode wirings extending along a first direction;

[0008] an insulating layer located on a side of the anode wiring away from the substrate, the insulating layer comprising a via hole exposing the anode wiring;

[0009] A plurality of auxiliary cathodes and anodes located on a side of the insulating layer away from the substrate, the auxiliary cathodes extending along a second direction, the second direction intersecting the first direction, the orthographic projection of the anode on the substrate and the orthographic projection of the auxiliary cathode on the substrate not overlapping, and the anodes connected to the anode wiring through the vias;

[0010] A pixel defining layer located on a side of the anode away from the substrate, the pixel defining layer comprising a first opening defining a pixel area;

[0011] an organic light-emitting layer located in the pixel area;

[0012] A cathode is located on a side of the organic light emitting layer away from the substrate, and the cathode is electrically connected to the auxiliary cathode.

[0013] In some embodiments, the display panel further includes:

[0014] A connecting electrode is provided in the same layer and material as the auxiliary cathode, the connecting electrode is located between the insulating layer and the anode, the connecting electrode is connected to the anode wiring through the via hole, and is connected to the anode.

[0015] In some embodiments, the anode comprises:

[0016] A first anode pattern and a second anode pattern are independent of each other, wherein the orthographic projection of the first anode pattern on the substrate overlaps with the pixel area, the orthographic projection of the second anode pattern on the substrate overlaps with the orthographic projection of the anode wiring on the substrate, and the first anode pattern and the second anode pattern are connected via a third anode pattern.

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

[0018] An auxiliary trace set in the same layer and material as the anode, the orthographic projection of the auxiliary trace on the substrate falls within the orthographic projection of the auxiliary cathode on the substrate, the orthographic projection of the auxiliary trace on the substrate falls within the orthographic projection of the cathode on the substrate, and the auxiliary trace is located between the auxiliary cathode and the cathode, and is in direct contact with the auxiliary cathode and the cathode respectively.

[0019] In some embodiments, the display panel further includes:

[0020] A cathode isolation column is located on the side of the anode away from the substrate, the cathode isolation column is located between adjacent pixel areas, the cathode isolation column extends along the second direction, the side of the cathode isolation column has a notch, and the cathode is disconnected at the side of the cathode isolation column.

[0021] In some embodiments, an orthographic projection of the cathode isolation column on the substrate does not overlap with an orthographic projection of the auxiliary cathode on the substrate.

[0022] In some embodiments, the pixel defining layer further includes a second opening exposing the auxiliary cathode, and the cathode is electrically connected to the auxiliary cathode through the second opening.

[0023] In some embodiments, the anode and / or the cathode is a light-transmitting electrode.

[0024] In some embodiments, the thickness of the insulating layer is 200-800 nanometers; and / or

[0025] The thickness of the auxiliary cathode is 200-1000 nanometers; and / or

[0026] The thickness of the anode is 40-200 nanometers; and / or

[0027] The thickness of the pixel defining layer is 1.5-2.0 microns.

[0028] An embodiment of the present disclosure further provides a display device, comprising the display panel as described above.

[0029] An embodiment of the present disclosure further provides a method for manufacturing a display panel, comprising:

[0030] providing a substrate;

[0031] forming a plurality of anode wirings on the substrate, wherein the anode wirings extend along a first direction;

[0032] forming an insulating layer covering the anode wiring, and etching the insulating layer to form a via hole exposing the anode wiring;

[0033] forming a plurality of auxiliary cathodes and anodes, wherein the auxiliary cathodes extend along a second direction, the second direction intersects the first direction, the orthographic projection of the anodes on the substrate does not overlap with the orthographic projection of the auxiliary cathodes on the substrate, and the anodes are connected to the anode wiring through the vias;

[0034] forming a pixel defining layer, wherein the pixel defining layer includes a first opening defining a pixel area;

[0035] forming an organic light-emitting layer in the pixel area;

[0036] A cathode is formed, and the cathode is electrically connected to the auxiliary cathode.

[0037] In some embodiments, the manufacturing method includes:

[0038] While forming the auxiliary cathode, a connecting electrode is formed through a same patterning process, and the connecting electrode is connected to the anode wiring through the via hole and is connected to the anode.

[0039] In some embodiments, forming the anode includes:

[0040] A third anode pattern, as well as a first anode pattern and a second anode pattern that are independent of each other are formed, wherein the orthographic projection of the first anode pattern on the substrate overlaps with the pixel area, the orthographic projection of the second anode pattern on the substrate overlaps with the orthographic projection of the anode wiring on the substrate, and the first anode pattern and the second anode pattern are connected via the third anode pattern.

[0041] In some embodiments, the manufacturing method includes:

[0042] While forming the anode, an auxiliary wiring is formed through the same composition process, the orthographic projection of the auxiliary wiring on the substrate falls into the orthographic projection of the auxiliary cathode on the substrate, the orthographic projection of the auxiliary wiring on the substrate falls into the orthographic projection of the cathode on the substrate, and the auxiliary wiring is located between the auxiliary cathode and the cathode, and is in direct contact with the auxiliary cathode and the cathode respectively.

[0043] In some embodiments, after forming the anode, the manufacturing method further comprises:

[0044] A cathode isolation column is formed, the cathode isolation column is located between adjacent pixel regions, the cathode isolation column extends along the second direction, the side of the cathode isolation column has a notch, and when the cathode is formed, the cathode is disconnected at the side of the cathode isolation column.

[0045] The embodiments of the present disclosure have the following beneficial effects:

[0046] In the above scheme, the display panel is provided with an auxiliary cathode, which is connected to the cathode. The auxiliary cathode is connected in parallel with the cathode to reduce the resistance of the cathode, thereby reducing the voltage drop of the cathode. When performing large-size display, the display brightness uniformity of the display panel can also be guaranteed, thereby helping to achieve large-size display. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic diagram of forming an anode routing for an embodiment of the present disclosure;

[0048] Figure 2 A schematic diagram of forming a via hole according to an embodiment of the present disclosure;

[0049] Figure 3 and Figure 4 A schematic diagram of forming an auxiliary cathode according to an embodiment of the present disclosure;

[0050] Figure 5 and Figure 6 A schematic diagram of forming an anode according to an embodiment of the present disclosure;

[0051] Figure 7 and Figure 8 A schematic diagram of forming a pixel definition layer according to an embodiment of the present disclosure;

[0052] Fig. 9 and Fig.10 A schematic diagram of forming a cathode isolation column according to an embodiment of the present disclosure;

[0053] Fig.11 and Fig.12 A schematic diagram of forming an organic light-emitting layer according to an embodiment of the present disclosure;

[0054] Fig.13 and Fig.14A schematic diagram of forming a cathode according to an embodiment of the present disclosure.

[0055] Reference numerals

[0056] 11 Anode wiring

[0057] 121 Vias

[0058] 13 Auxiliary cathode material layer

[0059] 131 Auxiliary cathode

[0060] 132 Connecting electrodes

[0061] 14 Anode material layer

[0062] 141 Auxiliary routing

[0063] 142 Second anode pattern

[0064] 143 Third anode pattern

[0065] 144 first anode pattern

[0066] 151 First Opening

[0067] 152 Second Opening

[0068] 16 Cathode isolation column

[0069] 17 Organic light emitting layer

[0070] 18 Cathode DETAILED DESCRIPTION

[0071] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present disclosure more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0072] Embodiments of the present disclosure provide a display panel and a manufacturing method thereof, and a display device, which can realize large-size display.

[0073] An embodiment of the present disclosure provides a display panel, such as Figure 1-14 As shown, including:

[0074] substrate;

[0075] A plurality of anode wirings 11 located on the substrate, the anode wirings 11 extending along a first direction;

[0076] An insulating layer located on a side of the anode wiring 11 away from the substrate, the insulating layer comprising a via 121 exposing the anode wiring 11;

[0077] A plurality of auxiliary cathodes 131 and anodes located on a side of the insulating layer away from the substrate, the auxiliary cathodes 131 extending along a second direction, the second direction intersecting the first direction, the orthographic projection of the anode on the substrate does not overlap with the orthographic projection of the auxiliary cathodes 131 on the substrate, and the anode is connected to the anode trace 11 through the via 121;

[0078] A pixel defining layer located on a side of the anode away from the substrate, the pixel defining layer comprising a first opening 151 defining a pixel area;

[0079] An organic light emitting layer 17 located in the pixel area;

[0080] The cathode 18 is located on a side of the organic light emitting layer 17 away from the substrate, and the cathode 18 is electrically connected to the auxiliary cathode 131 .

[0081] In this embodiment, the display panel is provided with an auxiliary cathode 131, which is connected to the cathode 18. The auxiliary cathode 131 is connected in parallel with the cathode 18 to reduce the resistance of the cathode 18, thereby reducing the voltage drop of the cathode 18. When performing large-size display, the display brightness uniformity of the display panel can also be guaranteed, thereby helping to achieve large-size display.

[0082] In this embodiment, the substrate adopts a light-transmitting substrate, and the substrate can be a glass substrate or a quartz substrate with a thickness of 50-1000 microns. Among them, the anode can be a light-transmitting electrode, and the anode can be made of transparent conductive materials such as ITO and IZO, and the thickness of the anode can be 40-200nm, so that light can be emitted from the anode side; or, the cathode 18 can be a light-transmitting electrode, and the cathode 18 can be made of transparent conductive materials such as ITO and IZO, and the thickness of the cathode 18 can be 40-200nm, so that light can be emitted from the cathode 18 side; or, the anode and the cathode 18 can both be light-transmitting electrodes, so that double-sided light emission can be achieved. The display panel of this embodiment can be applied to scenes such as vehicle sunroofs and skylights.

[0083] In this embodiment, Figure 1 As shown, a plurality of anode wirings 11 are arranged on the substrate. The anode wirings 11 are used to transmit the electrical signals loaded on the anodes. The anode wirings 11 can be formed on the substrate by sputtering or thermal evaporation with a thickness of about The metal layer may be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or an alloy of these metals. The metal layer may be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The metal layer is patterned to form a plurality of anode wirings 11, and the anode wirings 11 extend along a first direction. Specifically, the first direction may be a row direction, and the second direction may be a column direction.

[0084] An insulating layer is provided on the side of the anode away from the substrate. The insulating layer can be prepared by plasma enhanced chemical vapor deposition (PECVD) method. The insulating layer can be made of oxide, nitride or oxynitride with a thickness of 200-800nm. Figure 2 As shown, the insulating layer is patterned so that the insulating layer forms a via hole 121 exposing the anode wiring 11 .

[0085] like Figure 3 and Figure 4 As shown, an auxiliary cathode 131 is provided on the side of the insulating layer away from the substrate. The auxiliary cathode 131 can be made of metals such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, and alloys of these metals. The metal layer can be a single-layer structure or a multi-layer structure, and the multi-layer structure is such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The thickness of the auxiliary cathode 131 can be 200-1000nm; in addition, in order to optimize the electrical connection between the anode and the anode wiring 11, the display panel also includes: a connecting electrode 132 provided in the same layer and material as the auxiliary cathode 131, the connecting electrode 132 is located between the insulating layer and the anode, and the connecting electrode 132 is connected to the anode wiring 11 through the via 121, and is connected to the anode. The connecting electrode 132 and the auxiliary cathode 131 can be made by the same patterning process, so that the connecting electrode 132 can be made without adding an additional patterning process.

[0086] like Figure 5 and Figure 6As shown, the anode includes a third anode pattern 143, a first anode pattern 144 and a second anode pattern 142 which are independent of each other, the orthographic projection of the first anode pattern 144 on the substrate overlaps with the pixel area, the orthographic projection of the second anode pattern 142 on the substrate overlaps with the orthographic projection of the anode wiring 11 on the substrate, and the first anode pattern 144 and the second anode pattern 142 are connected through the third anode pattern 143. In this embodiment, the second anode pattern 142 is directly overlapped on the connecting electrode 132, and is connected to the anode wiring 11 through the connecting electrode 132; if the connecting electrode 132 is not provided, the second anode pattern 142 is connected to the anode wiring 11 through the via 121 penetrating the insulating layer. The first anode pattern 144 is located in the pixel area, and the second anode pattern 142 is located above the anode wiring 11. Specifically, the orthographic projection of the first anode pattern 144 on the substrate can coincide with the pixel area, and the orthographic projection of the second anode pattern 142 on the substrate falls within the orthographic projection of the anode wiring 11 on the substrate. The first anode pattern 144 and the second anode pattern 142 are independent of each other, and the first anode pattern 144 and the second anode pattern 142 are connected by a third anode pattern 143 with a smaller size. The width of the third anode pattern 143 in the first direction can be less than 100 nm. In this way, when a faulty area appears in the display panel, the third anode pattern 143 in the faulty area can be easily cut off to repair the display panel.

[0087] In order to optimize the electrical connection between the cathode 18 and the auxiliary cathode 131, in some embodiments, as Figure 5 and Figure 6 As shown, the display panel further includes: an auxiliary wiring 141 provided in the same layer and the same material as the anode, the orthographic projection of the auxiliary wiring 141 on the substrate falls within the orthographic projection of the auxiliary cathode 131 on the substrate, the orthographic projection of the auxiliary wiring 141 on the substrate falls within the orthographic projection of the cathode 18 on the substrate, and the auxiliary wiring 141 is located between the auxiliary cathode 131 and the cathode 18, and is in direct contact with the auxiliary cathode 131 and the cathode 18 respectively. The auxiliary wiring 141 and the anode can be manufactured by the same patterning process, so that the auxiliary wiring 141 can be manufactured without adding an additional patterning process.

[0088] In this embodiment, a pixel defining layer is disposed on the side of the anode away from the substrate. The pixel defining layer may be made of organic material and may have a thickness of 1.5-2.0 microns. Figure 7 and Figure 8As shown, the pixel defining layer includes a first opening 151 that defines a pixel area. In addition, in order to prevent the pixel defining layer from affecting the connection between the auxiliary cathode 131 and the cathode 18, the pixel defining layer also includes a second opening 152 that exposes the auxiliary cathode 131. The cathode 18 can be electrically connected to the auxiliary cathode 131 through the second opening 152.

[0089] In this embodiment, Fig. 9 and Fig.10 As shown, the display panel further includes: a cathode isolation column 16 located on the side of the anode away from the substrate, the cathode isolation column 16 can be made of organic material, and the thickness can be 1.5-2.0 microns. The cathode isolation column 16 is located between adjacent pixel areas, and the cathode isolation column 16 extends along the second direction. The side of the cathode isolation column 16 has a notch, so that when the cathode 18 is subsequently manufactured, the entire surface of the cathode 18 can be manufactured, which can simplify the manufacturing process of the cathode 18. The cathode 18 is disconnected at the side of the cathode isolation column 16 to form a plurality of independent cathode patterns.

[0090] In some embodiments, in order to prevent the cathode isolation column 16 from affecting the contact between the auxiliary cathode 131 and the cathode 18 , the orthographic projection of the cathode isolation column 16 on the substrate does not overlap with the orthographic projection of the auxiliary cathode 131 on the substrate.

[0091] like Fig.11 and Fig.12 As shown, the display panel also includes an organic light-emitting layer 17 located in the first opening 151 . When manufacturing the organic light-emitting layer 17 , a fine metal mask or a printing process can be used to manufacture the organic light-emitting layer 17 , so that the organic light-emitting layer 17 can be accurately formed in the first opening 151 .

[0092] like Fig.13 and Fig.14 As shown, the display panel also includes a cathode 18 located on the side of the organic light-emitting layer 17 away from the substrate. The cathode 18 is connected to the auxiliary wiring 141 and the auxiliary cathode 131. The auxiliary wiring 141 and the auxiliary cathode 131 can reduce the resistance of the cathode 18, thereby reducing the voltage drop of the cathode 18. When performing large-size display, the display brightness uniformity of the display panel can also be guaranteed, thereby helping to achieve large-size display.

[0093] An embodiment of the present disclosure further provides a display device, comprising the display panel as described above.

[0094] The display device includes but is not limited to: a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply. Those skilled in the art will appreciate that the structure of the above-mentioned display device does not constitute a limitation on the display device, and the display device may include more or less of the above-mentioned components, or a combination of certain components, or different component arrangements. In the embodiments of the present disclosure, the display device includes but is not limited to a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.

[0095] The display device may be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device further includes a flexible circuit board, a printed circuit board and a backplane.

[0096] The display device of this embodiment can realize double-sided light emission and can be applied to scenes such as vehicle sunroofs and skylights.

[0097] The embodiment of the present disclosure also provides a method for manufacturing a display panel, such as Figure 1-Figure 14 As shown, the manufacturing method of this embodiment includes:

[0098] Step 1, providing a substrate; forming a plurality of anode wirings 11 on the substrate, wherein the anode wirings 11 extend along a first direction;

[0099] In this embodiment, the substrate is a light-transmitting substrate, and the substrate may be a glass substrate or a quartz substrate with a thickness of 50-1000 microns.

[0100] like Figure 1 As shown, a layer with a thickness of about The metal layer may be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or an alloy of these metals. The metal layer may be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. A photoresist is coated on the metal layer, and after the photoresist is exposed and developed, a pattern of the photoresist is formed. The metal layer is etched using the pattern of the photoresist as a mask to form a pattern of the anode wiring 11, and the anode wiring 11 extends along a first direction.

[0101] Step 2: Figure 2As shown, a plasma enhanced chemical vapor deposition (PECVD) method can be used to form an insulating layer covering the anode wiring 11. The insulating layer can be made of oxide, nitride or oxynitride with a thickness of 200-800 nm. A photoresist is coated on the insulating layer, and after the photoresist is exposed and developed, a photoresist pattern is formed. The insulating layer is etched with the photoresist pattern to form a via 121 exposing the anode wiring 11.

[0102] Step 3: Figure 3 and Figure 4 As shown, an auxiliary cathode material layer 13 with a thickness of about 200-1000 nm can be formed on the substrate by sputtering or thermal evaporation. The auxiliary cathode material layer 13 can be metals such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, and alloys of these metals. The auxiliary cathode material layer 13 can be a single-layer structure or a multi-layer structure, and the multi-layer structure is such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. A photoresist is coated on the auxiliary cathode material layer 13, and after the photoresist is exposed and developed, a pattern of the photoresist is formed. The auxiliary cathode material layer 13 is etched using the pattern of the photoresist as a mask to form an auxiliary cathode 131, and the auxiliary cathode 131 extends along a second direction, and the second direction intersects with the first direction.

[0103] In addition, in order to optimize the electrical connection between the anode and the anode wiring 11 , a connection electrode 132 may be formed by a same patterning process while forming the auxiliary cathode 131 , and the connection electrode 132 is connected to the anode wiring 11 through the via 121 .

[0104] Step 4: Figure 5 and Figure 6 As shown, an anode is formed;

[0105] Specifically, an anode material layer 14 with a thickness of about 40-200 nm can be formed on the substrate by sputtering or thermal evaporation, and the anode material layer 14 can be made of ITO or IZO. A photoresist is coated on the anode material layer 14, and after the photoresist is exposed and developed, a pattern of the photoresist is formed. The anode material layer 14 is etched using the pattern of the photoresist as a mask to form an anode pattern.

[0106] The anode includes a third anode pattern 143, a first anode pattern 144 and a second anode pattern 142 which are independent of each other, the orthographic projection of the first anode pattern 144 on the substrate overlaps with the pixel area, the orthographic projection of the second anode pattern 142 on the substrate overlaps with the orthographic projection of the anode wiring 11 on the substrate, and the first anode pattern 144 and the second anode pattern 142 are connected through the third anode pattern 143. In this embodiment, the second anode pattern 142 is directly overlapped on the connecting electrode 132 and connected to the anode wiring 11 through the connecting electrode 132; if the connecting electrode 132 is not provided, the second anode pattern 142 is connected to the anode wiring 11 through the via 121 penetrating the insulating layer. The first anode pattern 144 is located in the pixel area, and the second anode pattern 142 is located above the anode wiring 11. The first anode pattern 144 and the second anode pattern 142 are independent of each other, and the first anode pattern 144 and the second anode pattern 142 are connected by a third anode pattern 143 with a smaller size. The width of the third anode pattern 143 in the first direction can be less than 100nm. In this way, when a faulty area appears in the display panel, the third anode pattern 143 in the faulty area can be easily cut off to repair the display panel.

[0107] In addition, in order to optimize the electrical connection between the cathode 18 and the auxiliary cathode 131, an auxiliary wiring 141 is formed through the same composition process while forming the anode, and the orthographic projection of the auxiliary wiring 141 on the substrate falls into the orthographic projection of the auxiliary cathode 131 on the substrate, and the orthographic projection of the auxiliary wiring 141 on the substrate falls into the orthographic projection of the cathode 18 on the substrate, and the auxiliary wiring 141 is located between the auxiliary cathode 131 and the cathode 18, and is in direct contact with the auxiliary cathode 131 and the cathode 18 respectively.

[0108] Step 5: Figure 7 and Figure 8 As shown, a pixel defining layer is formed;

[0109] The pixel defining layer can be made of organic materials and can have a thickness of 1.5-2.0 microns. Specifically, the pattern of the pixel defining layer can be formed by using organic resin materials through pre-baking, exposure, development and other steps, and the water and organic solvent can be removed by post-baking at 230 degrees. The pixel defining layer includes a first opening 151 that defines the pixel area. In addition, in order to prevent the pixel defining layer from affecting the connection between the auxiliary cathode 131 and the cathode 18, the pixel defining layer also includes a second opening 152 that exposes the auxiliary cathode 131, and the cathode 18 can be electrically connected to the auxiliary cathode 131 through the second opening 152.

[0110] Step 6: Fig. 9 and Fig.10As shown, a cathode isolation column 16 is formed;

[0111] The cathode spacer 16 can be made of organic material and can have a thickness of 1.5-2.0 microns. The pattern of the cathode spacer 16 can be formed by using organic resin material through pre-baking, exposure, development and other steps, and then post-baking at 230 degrees to remove water and organic solvent.

[0112] The cathode isolation column 16 is located between adjacent pixel regions, and the cathode isolation column 16 extends along the second direction. The side of the cathode isolation column 16 has a notch, so that when the cathode 18 is subsequently manufactured, a whole surface of the cathode 18 can be manufactured, which can simplify the manufacturing process of the cathode 18. The cathode 18 is disconnected at the side of the cathode isolation column 16 to form a plurality of independent cathode 18 patterns. In order to prevent the cathode isolation column 16 from affecting the contact between the auxiliary cathode 131 and the cathode 18, the positive projection of the cathode isolation column 16 on the substrate does not overlap with the positive projection of the auxiliary cathode 131 on the substrate.

[0113] Step 7: Fig.11 and Fig.12 As shown, an organic light emitting layer 17 is formed in the pixel area;

[0114] In this embodiment, the organic light emitting layer 17 may be formed in the pixel area by using a fine metal mask or a printing process.

[0115] Step 8: Fig.13 and Fig.14 As shown, a cathode 18 is formed, and the cathode 18 is electrically connected to the auxiliary cathode 131 .

[0116] Specifically, the cathode 18 with a whole surface can be prepared on the substrate by sputtering or thermal evaporation, with a thickness of about 40-200 nm. The cathode 18 can be made of transparent conductive materials such as ITO or IZO. The cathode 18 is electrically connected to the auxiliary wiring 141 and the auxiliary cathode 131 through the second opening 152. The auxiliary wiring 141 and the auxiliary cathode 131 can reduce the resistance of the cathode 18, thereby reducing the voltage drop of the cathode 18. When performing large-size display, the display brightness uniformity of the display panel can also be guaranteed, thereby facilitating the realization of large-size display.

[0117] The serial numbers of the above steps cannot be used to limit the sequence of the steps. For ordinary technicians in this field, without paying creative work, changes to the sequence of the steps are also within the protection scope of the present disclosure.

[0118] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiments.

[0119] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0120] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0121] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0122] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display panel, characterized in that: include: substrate; a plurality of anode wirings located on the substrate, the anode wirings extending along a first direction; an insulating layer located on a side of the anode wiring away from the substrate, the insulating layer comprising a via hole exposing the anode wiring; A plurality of auxiliary cathodes and anodes located on a side of the insulating layer away from the substrate, the auxiliary cathodes extending along a second direction, the second direction intersecting the first direction, the orthographic projection of the anode on the substrate and the orthographic projection of the auxiliary cathode on the substrate not overlapping, and the anodes connected to the anode wiring through the vias; A pixel defining layer located on a side of the anode away from the substrate, the pixel defining layer comprising a first opening defining a pixel area; an organic light-emitting layer located in the pixel area; A cathode is located on a side of the organic light emitting layer away from the substrate, and the cathode is electrically connected to the auxiliary cathode.

2. The display panel according to claim 1, characterized in that: The display panel further includes: A connecting electrode is provided in the same layer and material as the auxiliary cathode, the connecting electrode is located between the insulating layer and the anode, the connecting electrode is connected to the anode wiring through the via hole, and is connected to the anode.

3. The display panel according to claim 1, characterized in that: The anode comprises: A first anode pattern and a second anode pattern are independent of each other, wherein the orthographic projection of the first anode pattern on the substrate overlaps with the pixel area, the orthographic projection of the second anode pattern on the substrate overlaps with the orthographic projection of the anode wiring on the substrate, and the first anode pattern and the second anode pattern are connected via a third anode pattern.

4. The display panel according to claim 1, characterized in that: The display panel further includes: An auxiliary trace set in the same layer and material as the anode, the orthographic projection of the auxiliary trace on the substrate falls within the orthographic projection of the auxiliary cathode on the substrate, the orthographic projection of the auxiliary trace on the substrate falls within the orthographic projection of the cathode on the substrate, and the auxiliary trace is located between the auxiliary cathode and the cathode, and is in direct contact with the auxiliary cathode and the cathode respectively.

5. The display panel according to claim 1, characterized in that: The display panel further includes: A cathode isolation column is located on the side of the anode away from the substrate, the cathode isolation column is located between adjacent pixel areas, the cathode isolation column extends along the second direction, the side of the cathode isolation column has a notch, and the cathode is disconnected at the side of the cathode isolation column.

6. The display panel according to claim 5, characterized in that: The orthographic projection of the cathode isolation column on the substrate does not overlap with the orthographic projection of the auxiliary cathode on the substrate.

7. The display panel according to claim 1, characterized in that: The pixel defining layer further includes a second opening exposing the auxiliary cathode, and the cathode is electrically connected to the auxiliary cathode through the second opening.

8. The display panel according to claim 1, characterized in that: The anode and / or the cathode is a light-transmitting electrode.

9. The display panel according to claim 1, characterized in that: The thickness of the insulating layer is 200-800 nanometers; and / or The thickness of the auxiliary cathode is 200-1000 nanometers; and / or The thickness of the anode is 40-200 nanometers; and / or The thickness of the pixel defining layer is 1.5-2.0 microns.

10. A display device, characterized in that: The invention comprises a display panel as claimed in any one of claims 1 to 9.

11. A method for manufacturing a display panel, characterized in that: include: providing a substrate; forming a plurality of anode wirings on the substrate, wherein the anode wirings extend along a first direction; forming an insulating layer covering the anode wiring, and etching the insulating layer to form a via hole exposing the anode wiring; forming a plurality of auxiliary cathodes and anodes, wherein the auxiliary cathodes extend along a second direction, the second direction intersects the first direction, the orthographic projection of the anodes on the substrate does not overlap with the orthographic projection of the auxiliary cathodes on the substrate, and the anodes are connected to the anode wiring through the vias; forming a pixel defining layer, wherein the pixel defining layer includes a first opening defining a pixel area; forming an organic light-emitting layer in the pixel area; A cathode is formed, and the cathode is electrically connected to the auxiliary cathode.

12. The method for manufacturing a display panel according to claim 11, characterized in that: The production method comprises: While forming the auxiliary cathode, a connecting electrode is formed through a same patterning process, and the connecting electrode is connected to the anode wiring through the via hole and is connected to the anode.

13. The method for manufacturing a display panel according to claim 11, characterized in that: Forming the anode includes: A third anode pattern, as well as a first anode pattern and a second anode pattern that are independent of each other are formed, wherein the orthographic projection of the first anode pattern on the substrate overlaps with the pixel area, the orthographic projection of the second anode pattern on the substrate overlaps with the orthographic projection of the anode wiring on the substrate, and the first anode pattern and the second anode pattern are connected via the third anode pattern.

14. The method for manufacturing a display panel according to claim 11, characterized in that: The production method comprises: While forming the anode, an auxiliary wiring is formed through the same composition process, the orthographic projection of the auxiliary wiring on the substrate falls into the orthographic projection of the auxiliary cathode on the substrate, the orthographic projection of the auxiliary wiring on the substrate falls into the orthographic projection of the cathode on the substrate, and the auxiliary wiring is located between the auxiliary cathode and the cathode, and is in direct contact with the auxiliary cathode and the cathode respectively.

15. The method for manufacturing a display panel according to claim 11, characterized in that: After forming the anode, the manufacturing method further comprises: A cathode isolation column is formed, the cathode isolation column is located between adjacent pixel regions, the cathode isolation column extends along the second direction, the side of the cathode isolation column has a notch, and when the cathode is formed, the cathode is disconnected at the side of the cathode isolation column.

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