Display panel, display device and display panel preparation method

Abstract

The invention discloses a display panel, a display device and a display panel preparation method, the display panel comprises a display area and a non-display area, and the display panel further comprises a substrate; the first planarization layer is arranged on one side of the substrate and at least located in the non-display area; the wiring layer is at least located in the non-display area, the wiring layer of the non-display area comprises a first wiring part and a second wiring part, the first wiring part is the part, covered by the first planarization layer, of the wiring layer of the non-display area, and the second wiring part is the part, not covered by the first planarization layer, of the wiring layer of the non-display area; and the protective layer covers at least part of the second wiring part. According to the display panel provided by the embodiment of the invention, the protection layer is used for covering at least part of the second wiring part which is not covered by the first planarization layer in the wiring layer in the process of the display panel, so that the situation that the second wiring part is etched in the subsequent process, electrochemical corrosion is generated, a circuit of the wiring layer is damaged, and subsequent packaging failure is caused is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display device, in particular to a display panel, a display device and a display panel preparation method. BACKGROUND

[0002] The organic light emitting diode (OLED) display panel and the display panel using light emitting diode (LED) devices and other flat panel display devices have been widely used in mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, desktop computers and other consumer electronic products due to their high image quality, power saving, thin body and wide application range, and have become the mainstream of display devices.

[0003] However, the use performance of the current OLED product needs to be improved. SUMMARY

[0004] The display panel, the display device and the display panel preparation method provided by the embodiments of the present application can improve the use performance of the display panel.

[0005] In one aspect, the display panel provided by the embodiments of the present application comprises a display area and a non-display area, and further comprises a substrate, a first planarization layer disposed on one side of the substrate and located at least in the non-display area, a wiring layer located at least in the non-display area, the wiring layer in the non-display area comprising a first wiring portion and a second wiring portion, the first wiring portion being a portion of the wiring layer in the non-display area covered by the first planarization layer, and the second wiring portion being a portion of the wiring layer in the non-display area not covered by the first planarization layer, and a protective layer disposed on the side of the first planarization layer away from the substrate, the protective layer covering at least part of the second wiring portion.

[0006] According to one aspect of the embodiments of the present application, the second wiring portion comprises a top surface and a side wall, the protective layer covers at least part of the side wall of the second wiring portion, and / or the protective layer covers at least part of the top surface of the second wiring portion.

[0007] According to one aspect of the embodiments of the present application, the orthographic projection of the second wiring portion on the substrate is located within the orthographic projection of the protective layer on the substrate.

[0008] According to one aspect of the embodiments of the present application, the protective layer covers at least part of the side wall of the second wiring portion.

[0009] According to one aspect of the embodiments of the present application, the wiring layer is a composite film layer structure comprising multiple metal films with different etching selectivity ratios, and the protective layer covers at least the side wall of the metal film with the smallest etching selectivity ratio among the multiple metal films from the side wall of the second wiring portion.

[0010] According to an aspect of the embodiments of the present application, the trace layer includes a first titanium metal layer, an aluminum metal layer and a second titanium metal layer which are sequentially arranged in a direction away from the substrate, and the protective layer covers at least part of the sidewall of the second trace portion and at least part of the sidewall of the aluminum metal layer.

[0011] According to an aspect of the embodiments of the present application, the protective layer includes a first sub-portion and a second sub-portion, the first sub-portion covers the sidewall of the first titanium metal layer, the sidewall of the aluminum metal layer and the sidewall of the second titanium metal layer, and / or the second sub-portion covers the top surface of the second titanium metal layer.

[0012] According to an aspect of the embodiments of the present application, the first sub-portion covers the sidewall of the first titanium metal layer and the sidewall of the aluminum metal layer.

[0013] According to an aspect of the embodiments of the present application, the trace layer includes a plurality of sub-traces, the sub-traces are arranged in the second direction in the non-display area; the protective layer has a patterned film structure and includes a plurality of protective sub-portions, the protective sub-portions are arranged in the second direction in the non-display area, and the substrate orthographic projection of the sub-traces is located within the substrate orthographic projection of the protective sub-portions.

[0014] According to an aspect of the embodiments of the present application, the substrate orthographic projection of the plurality of sub-traces is located within the substrate orthographic projection of one protective sub-portion.

[0015] According to an aspect of the embodiments of the present application, the protective sub-portions correspond to the sub-traces one by one, and the substrate orthographic projection of the sub-traces is respectively located within the substrate orthographic projection of the corresponding protective sub-portions.

[0016] According to an aspect of the embodiments of the present application, the first planarization layer further includes a first blocking portion arranged in the display area; the display panel further includes a second planarization layer arranged on the side of the trace layer close to the substrate, and the second planarization layer further includes a second blocking portion arranged in the non-display area.

[0017] According to an aspect of the embodiments of the present application, the second blocking portion is arranged corresponding to the first blocking portion, and the substrate orthographic projection of the second blocking portion is located within the substrate orthographic projection of the first blocking portion.

[0018] According to an aspect of the embodiments of the present application, the non-display area includes a lower frame area, the trace layer extends in the direction from the display area to the non-display area in the lower frame area and covers part of the second blocking portion.

[0019] According to an aspect of the embodiments of the present application, the trace layer further includes at least one of a first conductive layer and a second conductive layer, the first conductive layer is disposed on the side of the second planarization layer close to the substrate, the second conductive layer is disposed between the first planarization layer and the second planarization layer, and the third conductive layer is disposed on the side of the first planarization layer away from the substrate. According to an aspect of the embodiments of the present application, the trace layer includes the first conductive layer and the second conductive layer, the second conductive layer covers at least part of the sidewall of the first conductive layer, and / or the second conductive layer covers at least part of the top surface of the first conductive layer.

[0020] According to an aspect of the embodiments of the present application, the trace layer further includes a third conductive layer and a third planarization layer, the third conductive layer is disposed on the side of the first planarization layer away from the substrate, the third planarization layer is disposed on the side of the third conductive layer away from the substrate, and the protective layer covers at least part of the third conductive layer in the non-display area which is not covered by the third planarization layer.

[0021] According to an aspect of the embodiments of the present application, the trace layer includes the first conductive layer and the third conductive layer, the third conductive layer covers at least part of the sidewall of the first conductive layer, and / or the third conductive layer covers at least part of the top surface of the first conductive layer.

[0022] According to an aspect of the embodiments of the present application, the first blocking part includes a plurality of blocking sub-parts, the plurality of blocking sub-parts are disposed in the non-display area along the direction from the display area to the non-display area, and the second trace part includes the trace layer disposed between adjacent blocking sub-parts.

[0023] According to an aspect of the embodiments of the present application, the display panel further includes a pixel definition layer disposed on the side of the first planarization layer away from the substrate, the pixel definition layer includes a pixel limiting part located in the display area and a pixel opening, the pixel limiting part encloses the pixel opening, and the pixel opening is used to accommodate the light emitting unit.

[0024] According to an aspect of the embodiments of the present application, the protective layer and the pixel definition layer are disposed in the same layer.

[0025] According to an aspect of the embodiments of the present application, the protective layer and the pixel definition layer are made of the same material.

[0026] According to an aspect of the embodiments of the present application, the protective layer and the pixel definition layer are integrally formed.

[0027] According to an aspect of the embodiments of the present application, the protective layer and the pixel definition layer include inorganic material.

[0028] According to an aspect of the embodiments of the present application, the protective layer includes organic material.

[0029] According to an aspect of the embodiments of the present application, the protective layer is disposed in the same layer as the planarization layer other than the first planarization layer.

[0030] According to an aspect of the embodiments of the present application, the display panel further comprises at least one isolation structure located in the display area, and arranged on a side of the pixel definition layer away from the substrate. The isolation structure encloses an isolation opening. The display opening and the pixel opening at least partially overlap in the substrate orthographic projection.

[0031] According to an aspect of the embodiments of the present application, the isolation structure comprises a first isolation portion and a second isolation portion arranged in sequence. The second isolation portion is located on a side of the first isolation portion away from the substrate. The orthographic projection of the first isolation portion on the substrate is located within the orthographic projection of the second isolation portion on the substrate.

[0032] According to an aspect of the embodiments of the present application, the first isolation portion is made of a conductive material. The display panel further comprises an electrode located on a side of the light emitting unit away from the substrate. The electrode is connected to the first isolation portion. The isolation structure is also located in the non-display area. The first isolation portion of the isolation structure in the non-display area is connected to the wiring layer through the pixel definition layer and the first planarization layer.

[0033] According to an aspect of the embodiments of the present application, the display panel further comprises a first encapsulation layer located in the display area and the non-display area, and arranged on a side of the isolation structure away from the substrate. The orthographic projection of the second wiring portion on the substrate is located within the orthographic projection of the first encapsulation layer on the substrate.

[0034] According to an aspect of the embodiments of the present application, the wiring layer comprises at least one of an ELVSS power line and an ELVDD power line.

[0035] In a second aspect, the embodiments of the present application provide another display panel. The display panel comprises a substrate. The display panel comprises a display area and a non-display area. The display panel further comprises: the substrate; a first planarization layer arranged on a side of the substrate and located at least in the non-display area; a wiring layer located at least in the non-display area. The wiring layer in the non-display area comprises a first wiring portion and a second wiring portion. The first wiring portion is a portion of the wiring layer in the non-display area covered by the first planarization layer. The second wiring portion is a portion of the wiring layer in the non-display area not covered by the first planarization layer; and a protection layer arranged on a side of the first planarization layer away from the substrate. The protection layer is in contact with at least part of the second wiring portion.

[0036] According to an aspect of the embodiments of the present application, the first wiring portion comprises a top surface and a sidewall. The protection layer comprises a first portion and a second portion. The first portion is in contact with at least part of the top surface. The second portion is in contact with at least part of the sidewall.

[0037] According to an aspect of the embodiments of the present application, the wiring layer is a composite film layer structure. The composite film layer structure comprises a first titanium metal layer, an aluminum metal layer and a second titanium metal layer arranged in sequence away from the substrate. The second portion is in contact with at least part of the sidewall of the first titanium metal layer, the aluminum metal layer and the second titanium metal layer. The first portion is in contact with at least part of the top surface of the second titanium metal layer.

[0038] According to an aspect of embodiments of the present application, the second section is in contact with at least part of the sidewall of the first titanium metal layer and the sidewall of the aluminum metal layer.

[0039] According to an aspect of embodiments of the present application, the display panel further comprises a functional layer, the functional layer comprises a pixel definition layer and the protective layer, the pixel definition layer is disposed on the side of the first planarization layer away from the substrate, the pixel definition layer comprises a pixel defining portion and a pixel opening in the display area, the pixel defining portion encloses the pixel opening, and the pixel opening is used to accommodate the light emitting unit.

[0040] According to an aspect of embodiments of the present application, the display panel further comprises an isolation structure at least in the display area, the isolation structure is disposed on the side of the pixel definition layer away from the substrate, the isolation structure encloses an isolation opening, and the pixel opening and the isolation opening at least partially overlap in the orthographic projection of the substrate.

[0041] According to an aspect of embodiments of the present application, the wiring layer in the orthographic projection of the substrate is within the orthographic projection of the functional layer in the orthographic projection of the substrate.

[0042] According to an aspect of embodiments of the present application, the second wiring section in the orthographic projection of the substrate is within the orthographic projection of the protective layer in the orthographic projection of the substrate.

[0043] According to an aspect of embodiments of the present application, the display panel further comprises a first encapsulation layer in the display area and the non-display area, the first encapsulation layer is disposed on the side of the protective layer and the isolation structure away from the substrate, and the second wiring section in the orthographic projection of the substrate is within the orthographic projection of the first encapsulation layer in the orthographic projection of the substrate.

[0044] In a third aspect, embodiments of the present application further provide a display device comprising any of the display panels as described above.

[0045] In a fourth aspect, embodiments of the present application further provide a display panel preparation method, comprising:

[0046] providing a substrate and dividing the display panel into a display area and a non-display area;

[0047] forming a wiring layer on one side of the substrate, the wiring layer being at least in the non-display area;

[0048] preparing a first planarization layer on the side of the wiring layer away from the substrate;

[0049] performing a patterning process on the first planarization layer to expose at least part of the wiring layer, the wiring layer comprising a first wiring section and a second wiring section, the first wiring section being the part of the wiring layer in the non-display area covered by the first planarization layer, and the second wiring section being the part of the wiring layer in the non-display area not covered by the first planarization layer;

[0050] preparing a protective layer on the side of the first planarization layer away from the substrate;

[0051] The protective layer is patterned to cover at least part of the second trace portion.

[0052] According to an aspect of the embodiments of the present application, in the step of preparing the protective layer on the side of the first planarization layer away from the substrate, the method further comprises preparing a pixel definition layer, the pixel definition layer comprising a pixel defining portion and a pixel opening in the display area, the pixel defining portion enclosing the pixel opening, and the pixel opening being configured to accommodate the light emitting unit.

[0053] According to an aspect of the embodiments of the present application, in the step of preparing the protective layer on the side of the first planarization layer away from the substrate, the method further comprises,

[0054] preparing a functional layer;

[0055] patterning the functional layer to form the pixel definition layer and the protective layer;

[0056] According to an aspect of the embodiments of the present application, the material of the functional layer comprises an inorganic material.

[0057] The display panel provided by the embodiments of the present application covers at least part of the second trace portion that is not covered by the first planarization layer in the process of the display panel, so as to avoid etching of the second trace portion in the subsequent process, electrochemical corrosion, damage of the circuit of the trace layer, and failure of subsequent packaging. BRIEF DESCRIPTION OF DRAWINGS

[0058] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0059] Figure 1 is a partial structure diagram of a lower frame of a display panel;

[0060] Figure 2 is Figure 1 is a structure diagram of an A1 area of a display panel;

[0061] Figure 3 is Figure 2 is a cross-sectional structure diagram along A-A';

[0062] Figure 4 is Figure 2 is a cross-sectional structure diagram along B-B';

[0063] Figure 5 is Figure 1 is another structure diagram of an A1 area of a display panel;

[0064] Figure 6 is Figure 5 is a cross-sectional structure diagram along C-C';

[0065] Figure 7 is Figure 5Another cross-sectional structure schematic view along C-C';

[0066] Figure 8 is Figure 1 Another structure schematic view of the display panel A1 area shown;

[0067] Figure 9 is Figure 8 Another cross-sectional structure schematic view along D-D';

[0068] Figure 10 is Figure 8 Another cross-sectional structure schematic view along E-E';

[0069] Figure 11 is a flow chart of a display panel preparation method provided by an embodiment of the present application;

[0070] Figure 12 is a flow chart of another display panel preparation method provided by an embodiment of the present application;

[0071] Figure 13 is a flow chart of another display panel preparation method provided by an embodiment of the present application;

[0072] Figure 14 is Figure 2 Another cross-sectional structure schematic view along A-A';

[0073] Figure 15 is Figure 2 Another cross-sectional structure schematic view along B-B';

[0074] Figure 16 is Figure 2 Another cross-sectional structure schematic view along A-A';

[0075] Figure 17 is Figure 2 Another cross-sectional structure schematic view along B-B';

[0076] Figure 18 is Figure 5 Another cross-sectional structure schematic view along C-C'.

[0077] wherein:

[0078] 10 - display panel;

[0079] 11 - display area; 12 - non-display area; 121 - lower frame area;

[0080] 20 - substrate;

[0081] 30 - trace layer; 31 - first trace part; 32 - second trace part; 321 - top surface; 322 - sidewall; 323 - first titanium metal layer; 324 - aluminum metal layer; 325 - second titanium metal layer; 3231 - first titanium metal layer sidewall; 3241 - aluminum metal layer sidewall; 3251 - second titanium metal layer sidewall; 3252 - second titanium metal layer top surface; 33 - sub-trace; 34 - first wire layer; 35 - second wire layer; 36 - third wire layer;

[0082] 40 - first planarization layer; 41 - first blocking part; 411 - blocking subpart;

[0083] 50 - second planarization layer; 50' - third planarization layer; 51 - second blocking part;

[0084] 60 - protection layer; 61 - first subpart; 62 - second subpart; 63 - protection subpart;

[0085] 70 - pixel definition layer; 71 - pixel opening; 72 - light emitting unit;

[0086] 80 - isolation structure; 81 - first isolation part; 82 - second isolation part; 83 - isolation opening;

[0087] 90 - electrode; 100 - functional layer;

[0088] Y - first direction; X - second direction.

[0089] In the drawings, the same components have the same reference numbers. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0090] Features and exemplary embodiments of various aspects of the present application will be described below in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely illustrative of the present application and is not intended to limit the present application, as is apparent to one of ordinary skill in the art. In the drawings and description below, well-known structures and techniques have not been shown or described in detail in order not to obscure the application. Also, descriptions of features, structures, or characteristics can be presented in terms of their being combined into one or more embodiments, for brevity.

[0091] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0092] The orientation words appearing in the following description are the directions shown in the figures, and do not limit the specific structure of the display panel and the display device of the present application. In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arranged", "connected" should be understood in a broad sense, for example, can be fixedly connected, or detachably connected, or integrally connected; can be directly connected, or indirectly connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0093] OLED display screen is one of the display screen schemes commonly used in electronic devices such as mobile phones, tablet computers, smart wearable devices, and large-screen display devices. At present, a common failure phenomenon of OLED display screen is black spot. Black spot is formed due to the failure of OLED packaging, water and oxygen entering and corroding the light-emitting layer and cathode evaporation layer (not shown in the figure) of OLED. There are many reasons for the failure of OLED packaging, such as common packaging foreign matter, packaging layer cracks, etc.

[0094] Please refer to Figure 1 , in a first aspect, the embodiments of the present application provide a display panel 10.

[0095] One common design defect of the display panel 10 exists in the A1 area in Figure 1 The A1 area in the figure is the lower frame area of the display panel 10. The following frame area is taken as an example for description, only because it is convenient for explanation and setting the following structure in the lower frame area is a conventional technical setting in the art, and the present application is not limited to the lower frame area, and can also be set in any area of the display panel 10.

[0096] The display panel 10 is divided into a display area 11 and a non-display area 12 in the planar direction, and the non-display area 12 is arranged around the display area 11.

[0097] The display area 11 is a main functional area for the display panel 10 to display content, and the relevant pixel structure is arranged in the display area 11, which can emit light and display different texts, images and videos by adjusting different brightness and colors.

[0098] The non-display area 12 can be arranged around the display area 11 to ensure the packaging effect of the display panel 10, accommodate the circuit and the driving chip, or allow the circuit and the driving chip for controlling and driving the display area 11 to pass through and be arranged on the backlight side of the display panel 10. In the non-display area 12, corresponding structures are arranged to prevent the packaging layer of the display panel 10 from overflowing to ensure the packaging effect, and the part of the circuit and the driving chip DDIC (Display Driver Integrated Circuit, DDIC) connected from the display area 11 and needing to pass through the non-display area 12 is arranged to electrically connect the driving circuit of the display area 11 with the driving chip located outside the display panel 10. The circuit and the structure located in the non-display area 12 overlap and intersect, which is prone to packaging failure and other problems.

[0099] The structure in the non-display area 12 will be described in detail below.

[0100] Please refer to Figure 2 , Figure 3 and Figure 4 , in a first aspect, the embodiments of the present application provide a display panel 10, comprising a substrate 20, a first planarization layer 40, a wiring layer 30 and a protection layer 60, the first planarization layer 40 is arranged on one side of the substrate 20 and at least in the non-display area 12;

[0101] The wiring layer 30 is at least located in the non-display area 12, and the wiring layer 30 of the non-display area 12 includes a first wiring part 31 and a second wiring part 32. The first wiring part 31 is the part of the wiring layer 30 of the non-display area 12 covered by the first planarization layer 40, and the second wiring part 32 is the part of the wiring layer 30 of the non-display area 12 not covered by the first planarization layer 40;

[0102] The protection layer 60 is arranged on the side of the first planarization layer 40 away from the substrate 20, and the protection layer 60 covers at least part of the second wiring part 32.

[0103] The display panel 10 provided by the embodiments of the present application covers at least part of the second wiring part 32 of the wiring layer 30 not covered by the first planarization layer 40 in the process of the display panel 10 with the protection layer 60, avoids the second wiring part 32 from being etched in the subsequent process, causes electrochemical corrosion, damages the circuit of the wiring layer 30, causes packaging failure, and allows the water vapor and oxygen channel outside the display panel 10 to enter the display area, and causes problems such as black spots of the display panel 10.

[0104] The display panel 10 includes a substrate 20 in the up-down stacking direction, which mainly plays a supporting role in the display panel 10. The substrate 20 can include a plurality of film layer structures. The substrate 20 can include, but is not limited to, a driving circuit layer and a wiring medium layer covering one side of the driving circuit layer.

[0105] The wiring layer 30 is arranged on the side of the wiring medium layer away from the driving circuit layer. One end of the wiring layer 30 is electrically connected to the driving circuit of the display area 11, and the other end is electrically connected to the driving chip DDIC. The wiring layer 30 electrically connects the display area 11 and the DDIC, and needs to pass through the non-display area 12.

[0106] Directly passing through the non-display area 12 by the wiring layer 30 can more effectively utilize the space and avoid allocating additional space for wiring in the non-display area 12, thereby minimizing the overall thickness of the display panel 10.

[0107] At the same time, directly connecting the DDIC outside the display panel 10 by the wiring layer 30 from the non-display area 12 can reduce the complexity of the connection path and improve the reliability and stability of the circuit connection.

[0108] The wiring medium layer generally also considers the quality and stability of signal transmission of the wiring layer 30 in the design, and selects the wiring path of the wiring layer 30 passing through the non-display area 12. The wiring medium layer can better protect and isolate the signal transmission of the wiring layer 30, reduce interference with other interference sources, and improve the quality and stability of signal transmission.

[0109] The first planarization layer 40 is further arranged on the side of the wiring layer 30 away from the substrate 20. The main function is to perform planarization processing on the display panel 10 in the display area 11, facilitate subsequent process flow, prevent physical damage to the display area 11 by external factors in the non-display area 12, effectively isolate the display area 11 from the outside world, and reduce the influence of external factors on the display area 11.

[0110] Therefore, the wiring layer 30 and the first planarization layer 40 overlap in the non-display area 12. The wiring layer 30 is continuously distributed in the wiring medium layer, and the orthogonal projection of the wiring layer 30 in the wiring medium layer at least partially overlaps the orthogonal projection of the first planarization layer 40 in the wiring medium layer. Therefore, the wiring layer 30 located in the non-display area 12 includes a portion covered by the first planarization layer 40 and a portion not covered by the first planarization layer 40, and the second wiring part 32 is exposed from the first planarization layer 40. In subsequent process flow, it is easy to be affected by wet etching process and dry etching process, etc., to produce acid liquid accumulation, cause the wiring layer 30 to be etched, produce electrochemical corrosion, damage the circuit of the wiring layer 30, cause subsequent packaging failure, water vapor and oxygen channels outside the display panel 10 enter the display area 11, and cause display panel 10 black spot and other problems.

[0111] Therefore, a common design defect of the display panel 10 is formed in the partially overlapping area of ​​the wiring layer 30 and the first planarization layer 40 in the non-display area 12, that is, Figure 1 The A1 region, which is mainly located in the partially overlapping area, is directly exposed to the second wiring portion 32 and is prone to acid accumulation, causing electrochemical corrosion.

[0112] The protective layer 60 is used to cover at least a portion of the second wiring portion 32 to protect the second wiring portion 32 and prevent electrochemical corrosion in subsequent process steps. Figure 1 Not shown in Figure 2 As shown in the structural drawings of the display panel 10 in the A1 area in other subsequent embodiments, the protective layer 60 is shown in the same drawing as other structures in the covered area to more clearly illustrate the other structures in the area covered by the protective layer 60. This application no longer limits the protective layer 60 to a transparent material; the protective layer 60 can be made of transparent materials or opaque materials, and this application does not limit this.

[0113] See also Figure 5 and Figure 6 In some embodiments, the second routing portion 32 includes a top surface and sidewalls, the protective layer 60 covers at least a portion of the sidewalls 322 of the second routing portion 32 , and / or the protective layer 60 covers at least a portion of the top surface 321 of the second routing portion 32 .

[0114] The display panel 10 provided in the embodiment of the present application covers the top surface 321 and the side wall 322 of the second wiring portion 32 respectively through the protective layer 60. The protective layer 60 can be flexibly and selectively set to cover different positions of the second wiring portion 32 that is easily etched, thereby achieving precise coverage and improving the protection effect.

[0115] The “and / or” here means that the protective layer 60 can completely cover the second routing portion 32, or the protective layer 60 can be separately set to cover the side wall 322 and the top surface 321 of the second routing portion 32 respectively, or the protective layer 60 only covers one of the side wall 322 or the top surface 321 of the second routing portion 32 according to the covering requirements.

[0116] In some optional embodiments, the orthographic projection of the second routing portion 32 on the substrate 20 is located within the orthographic projection of the protection layer 60 on the substrate 20 .

[0117] In the display panel 10 provided in the embodiment of the present application, the second wiring portion 32 is completely covered by the protective layer 60 , thereby improving the protection effect.

[0118] In some embodiments, the protection layer 60 covers at least a portion of the sidewall 322 of the second wiring portion 32 .

[0119] The display panel 10 provided by the embodiment of the present application covers the side wall 322 of the second wiring part 32 which is easy to be etched by the protective layer 60, realizes accurate coverage, and improves the protection effect.

[0120] The side wall 322 of the second wiring part 32 is not only easy to be etched as the top surface 321 in the subsequent process, but also easy to be further etched by the acid liquid accumulated between the patterns of the first planarization layer 40 in the process of wet etching. Therefore, the side wall 322 is more easy to be etched than the top surface 321.

[0121] In some optional embodiments, the wiring layer 30 is a composite film layer structure including multiple metal films with different etching selectivity ratios, and the protective layer 60 covers at least the side wall of the metal film with the minimum etching selectivity ratio among the multiple metal films from the side wall 322 of the second wiring part 32.

[0122] The display panel 10 provided by the embodiment of the present application covers the side wall of the metal film with the minimum etching selectivity ratio in the second wiring part 32 by the protective layer 60, realizes further accurate coverage, and further improves the protection effect.

[0123] In some embodiments, the wiring layer 30 includes a first titanium metal layer 323, an aluminum metal layer 324 and a second titanium metal layer 325 which are sequentially stacked in the direction away from the substrate 20, and the protective layer 60 covers at least part of the side wall of the second wiring part 32 and covers at least part of the side wall 3241 of the aluminum metal layer.

[0124] The display panel 10 provided by the embodiment of the present application covers the side wall 3241 of the aluminum metal layer with the minimum etching selectivity ratio by the protective layer 60, realizes further accurate coverage, and further improves the protection effect.

[0125] The aluminum metal layer 324, the first titanium metal layer 323 and the second titanium metal layer 325 are different in material, and when corroded by the acid liquid, the etching rate of the aluminum metal layer 324 is faster and the aluminum metal layer 324 is more easy to be etched. Therefore, the wiring layer 30 provided by the composite film layer structure of the first titanium metal layer 323, the aluminum metal layer 324 and the second titanium metal layer 325 can provide better protection performance. The first titanium metal layer 323 and the second titanium metal layer 325 can be used as a protective structure to prevent the influence of physical damage and electrochemical corrosion from the outside on the wiring layer 30. At the same time, the aluminum metal layer 324 has good conductivity and is used as a conductive layer to play a role in transmitting current, connect different parts of the circuit, and realize the transmission and connection function of signals.

[0126] But the aluminum metal layer 324 still has exposed part from the side wall 322 of the trace layer 30, and the acid liquid will corrode the aluminum metal layer side wall 3241 in the subsequent process, causing electrochemical corrosion, so the protective layer 60 needs to cover at least part of the first trace part 31 side wall 322 and cover at least part of the aluminum metal layer side wall 3241.

[0127] In some embodiments, the protective layer 60 includes a first part 61 and a second part 62, the first part 61 covers the first titanium metal layer side wall 3231, the aluminum metal layer side wall 3241 and the second titanium metal layer side wall 3251, and / or the second part 62 covers the second titanium metal layer top surface 3252.

[0128] The display panel 10 provided by the embodiments of the present application is divided into a first part 61 and a second part 62 by setting the protective layer 60, and the side walls of different metal film layers in the second trace part 32 and the second titanium metal layer top surface 3252 above the first titanium metal layer and the aluminum metal layer are covered respectively, so that more accurate coverage is achieved and the protection effect is improved.

[0129] Here, and / or means that the first part 61 and the second part 62 can be set simultaneously, the first part 61 and the second part 62 are not connected, and cover the metal layer side wall and the second titanium metal layer top surface 3252 respectively, or the first part 61 and the second part 62 can be prepared simultaneously to form a complete protective layer 60 film layer, or only the first part 61 or the second part 62 is set, the first part 61 covers the second titanium metal layer top surface 3252 to prevent the top surface from being etched by using a dry etching process in the subsequent process, and the second part 62 covers the metal film layer side wall to prevent the side wall from accumulating acid liquid in a wet etching process in the subsequent process, thereby causing etching.

[0130] Please refer to Figure 7 In some optional embodiments, the first part 61 covers the first titanium metal layer side wall 3231 and the aluminum metal layer side wall 3241.

[0131] The display panel 10 provided by the embodiments of the present application further covers the first titanium metal layer side wall 3231 and the aluminum metal layer 324 by the first part 61, so that the position that is easy to be etched is further and more accurately covered, and the protection effect is further improved.

[0132] Please refer to Figure 8 , Figure 9 and Figure 10 Another embodiment of the present application provides a display panel 10, the trace layer 30 includes a plurality of sub-traces, the sub-traces are arranged in the second direction X in the non-display area 12, and are arranged in the direction from the display area 11 to the non-display area 12 with intervals.

[0133] The protective layer 60 has a patterned film layer structure, including a plurality of protective sub-parts 63, the protective sub-parts 63 are arranged in the second direction X from the display area 11 to the non-display area 12 in the second area, and the sub-wire is in the orthographic projection of the substrate 20 within the orthographic projection of the protective sub-part 63 in the substrate 20.

[0134] The display panel 10 provided by the embodiment of the present application is divided into a plurality of protective sub-parts 63 by the protective layer 60, so as to more accurately cover a plurality of sub-wires of the wire layer 30, improve the protection effect, and without significantly increasing the thickness of the non-display area 12.

[0135] The wire layer 30 includes sub-wires for different functions, the sub-wires are used to divide the wires for different functions, the protective layer 60 is divided into a plurality of protective sub-parts 63 by the patterning process, so as to achieve further accurate coverage, and the corresponding relationship between the protective sub-part 63 and the sub-wire can be that one protective sub-part 63 covers a plurality of adjacent sub-wires, or one protective sub-part 63 corresponds to one sub-wire, as long as the orthographic projection of the sub-wire in the substrate 20 is within the orthographic projection of the protective sub-part 63 in the substrate 20.

[0136] The orthographic projection of one sub-wire in the substrate 20 can be arranged within the orthographic projection of a plurality of protective sub-parts 63 in the substrate 20.

[0137] The protective layer 60 can also be arranged in one-to-one correspondence between the protective sub-part 63 and the sub-wire, and the orthographic projection of the sub-wire in the substrate 20 is arranged within the orthographic projection of the corresponding protective sub-part 63 in the substrate 20.

[0138] The protective layer 60 can also arrange the orthographic projection of a plurality of different sub-wires in the substrate 20 within the orthographic projection of a plurality of different protective sub-parts 63 in the substrate 20, and adjust according to the actual effective space of the non-display area 12 and design requirements.

[0139] The protective layer 60 is divided into a plurality of protective sub-parts 63, and the plurality of sub-wires of the wire layer 30 are accurately covered by shape matching, which can reduce the coverage area of the protective layer 60 covering the non-display area 12, avoid occupying the effective arrangement space of other structures in the non-display area 12, make the structure design and space allocation more reasonable, and the integration of the non-display area 12 is higher, and the overall thickness of the display panel 10 is minimized.

[0140] In some optional embodiments, the orthographic projection of a plurality of sub-wires in the substrate 20 is within the orthographic projection of one protective sub-part 63 in the substrate 20.

[0141] The display panel 10 provided in the embodiment of the present application can further precisely cover and further improve the protection effect by arranging the plurality of sub-walk lines in one protection sub-part 63, and can reduce the difficulty of the patterning process and improve the production efficiency of the display panel 10 by covering the adjacent sub-walk lines with one protection sub-part 63.

[0142] In some optional embodiments, the protection sub-part 63 is in one-to-one correspondence with the first sub-part, and the orthographic projection of the sub-walk line on the substrate 20 is located in the orthographic projection of the corresponding protection sub-part 63 on the substrate 20.

[0143] The display panel 10 provided in the embodiment of the present application can further precisely cover and further improve the protection effect by arranging the plurality of sub-walk lines in one protection sub-part 63, and can reduce the difficulty of the patterning process and improve the production efficiency of the display panel 10 by covering the adjacent sub-walk lines with one protection sub-part 63.

[0144] Please refer to Figure 2 , Figure 3 and Figure 4 , in the display panel 10 provided in the embodiment of the present application, the first planarization layer 40 further includes a first blocking part 41 arranged in the non-display area 12, the display panel 10 further includes a second planarization layer 50 arranged on the side of the walk line layer 30 close to the substrate 20, and the second planarization layer 50 further includes a second blocking part 51 arranged in the non-display area 12.

[0145] The display panel 10 provided in the embodiment of the present application can further precisely cover and further improve the protection effect by arranging the plurality of sub-walk lines in one protection sub-part 63, and can reduce the difficulty of the patterning process and improve the production efficiency of the display panel 10 by covering the adjacent sub-walk lines with one protection sub-part 63.

[0146] The first blocking part 41 and the second blocking part 51 are arranged in the non-display area 12, and mainly function to protect the display area 11 and prevent physical damage of the display area 11 caused by external factors, so that the display area 11 can be effectively isolated from the external environment and the influence of external factors on the display area 11 can be reduced.

[0147] In some optional embodiments, the second blocking part 51 is arranged in correspondence with the first blocking part 41, and the orthographic projection of the second blocking part 51 on the substrate 20 is located in the orthographic projection of the first blocking part 41 on the substrate 20.

[0148] The display panel 10 provided in the embodiment of the present application can further precisely cover and further improve the protection effect by arranging the plurality of sub-walk lines in one protection sub-part 63, and can reduce the difficulty of the patterning process and improve the production efficiency of the display panel 10 by covering the adjacent sub-walk lines with one protection sub-part 63.

[0149] The dam structure is formed by the first blocking part 41 and the second blocking part 51 in the display panel 10 provided in the embodiments of the present application, and the dam structure can further include a plurality of film layers, including but not limited to other insulating layers, which are not limited herein.

[0150] The dam structure formed by the first blocking part 41 and the second blocking part 51 overlaps with the wiring layer 30 in the non-display area 12. The wiring layer 30 is continuously distributed in the wiring medium layer, and the orthographic projection of the wiring layer 30 on the wiring medium layer partially overlaps with the orthographic projection of the dam structure on the wiring medium layer. In the area where the orthographic projection of the wiring layer 30 on the wiring medium layer partially overlaps with the orthographic projection of the dam structure on the wiring medium layer, the wiring layer 30 and the dam structure are perpendicular to each other. The above arrangement can more effectively utilize the limited space resources, minimize the additional space allocated to the arrangement of the wiring layer 30 and the dam structure in the non-display area 12, and save space as much as possible, so that the overall display panel 10 is more compact.

[0151] Meanwhile, the wiring layer 30 and the dam structure are arranged perpendicular to each other in the overlapping area, which also helps to improve the structural stability of the display panel 10. The wiring layer 30 and the dam structure support each other, the stress is uniform, the strength and stability of the overall structure are increased, and the durability of the display panel 10 is improved.

[0152] In some optional embodiments, the non-display area 12 includes a lower frame area 121, and the wiring layer 30 extends in the direction from the display area 11 to the non-display area 12 and covers part of the second blocking part 51 in the lower frame area 121.

[0153] The display panel 10 provided in the embodiments of the present application is characterized in that the wiring layer 30 passes between the first blocking part 41 and the second blocking part 51, and the wiring layer 30 covers the second wiring part 32 and is exposed only from the first blocking part 41, thereby reducing the exposed part of the wiring layer 30.

[0154] Please refer to Figure 3 , Figure 4 , Figure 14 and Figure 15 In some optional embodiments, the wiring layer 30 further includes at least one of the first conductive layer 34 and the second conductive layer 35, the first conductive layer 34 is arranged on the side of the second planarization layer 50 close to the substrate 20, and the second conductive layer 35 is arranged between the first planarization layer 40 and the second planarization layer 50.

[0155] The display panel 10 provided in the embodiments of the present application is characterized in that the wiring layer 30 can be flexibly arranged and adjusted.

[0156] Please refer to Figure 18In some optional embodiments, the wiring layer 30 includes a first conductive layer 34 and a second conductive layer 35, the second conductive layer 35 covers at least part of the sidewall of the first conductive layer 34, and / or the second conductive layer 35 covers at least part of the top surface of the first conductive layer 34.

[0157] The display panel 10 provided by the embodiments of the present application can first use the second conductive layer 35 to cover the first conductive layer 34 to achieve a first layer protection effect, and then use the protective layer 60 to cover the first conductive layer 34 and the second conductive layer 35 to achieve a second layer protection effect, so that the protection effect is better.

[0158] Please refer to Figure 16 and Figure 17 Optionally, the wiring layer 30 further includes a third conductive layer 36 and a third planarization layer 50', the third conductive layer 36 is arranged on the side of the first planarization layer 40 away from the substrate 20, the third planarization layer 50' is arranged on the side of the third conductive layer 36 away from the substrate 20, and the protective layer 60 covers at least part of the third conductive layer 36 of the non-display area 12 which is not covered by the third planarization layer 50'.

[0159] The display panel 10 provided by the embodiments of the present application can be more flexible in the arrangement of the wiring layer 30 and has a better protection effect of the protective layer 60.

[0160] Please refer to Figure 18 In some optional embodiments, the wiring layer 30 includes a first conductive layer 34 and a third conductive layer 36, the third conductive layer 36 covers at least part of the sidewall of the first conductive layer 34, and / or the third conductive layer 36 covers at least part of the top surface of the first conductive layer 34.

[0161] The display panel 10 provided by the embodiments of the present application can first use the third conductive layer 36 to cover the first conductive layer 34 to achieve a first layer protection effect, and then use the protective layer 60 to cover the first conductive layer 34 and the third conductive layer 36 to achieve a second layer protection effect, so that the protection effect is better.

[0162] In some embodiments, the first blocking part 41 includes a plurality of blocking sub-parts 411, the plurality of blocking sub-parts 411 are arranged at intervals in the non-display area 12 along the direction from the display area 11 to the non-display area 12, and the second wiring part 32 includes the wiring layer 30 arranged between adjacent blocking sub-parts 411.

[0163] The display panel 10 provided by the embodiments of the present application can not only block the overflow of the encapsulation layer and further improve the encapsulation effect by arranging the first blocking part 41 as a plurality of blocking sub-parts 411, but also can provide additional support force by the blocking sub-parts 411 to ensure the flatness and stability of the display panel 10.

[0164] The blocking sub-section 411 can further improve the packaging effect, and the protection layer 60 also needs more accurate coverage. In the process of making the dam structure, in order to form a plurality of continuously and spacedly arranged blocking sub-sections 411, a complete first planarization layer 40 is usually formed, and then the material between the blocking sub-sections 411 is removed to form a plurality of blocking sub-sections 411, so that the part of the wiring layer 30 between the blocking sub-sections 411 is also completely exposed, and the protection layer 60 is lacking, which is easy to be affected by external factors, such as corrosion, etching and mechanical damage, and in the subsequent process, acid liquid is easy to accumulate between the blocking sub-sections 411, which causes the second wiring part 32 between the blocking sub-sections 411 to be further corroded to form an undercut structure, causing electrochemical corrosion of the wiring layer 30, and causing damage to the wiring layer 30.

[0165] In some embodiments, the display panel 10 further comprises a pixel definition layer 70 disposed on the side of the first planarization layer 40 away from the substrate 20, the pixel definition layer 70 comprises a pixel limiting part and a pixel opening 71 in the display area, the pixel limiting part encloses the pixel opening 71, and the pixel opening 71 is used to accommodate the light emitting unit 72.

[0166] The display panel 10 provided by the embodiments of the present application further comprises a pixel definition layer 70, and the pixel opening 71 is enclosed by the pixel limiting part of the pixel definition layer 70 in the display area 11 to accommodate the light emitting unit 72 of the display panel 10, so that the light emitting unit 72 for realizing the light emitting function of the display panel 10 is arranged.

[0167] In some optional embodiments, the protection layer 60 and the pixel definition layer 70 are disposed in the same layer.

[0168] The display panel 10 provided by the embodiments of the present application is provided by the protection layer 60 and the pixel definition layer 70 disposed in the same layer, which reduces the process steps and improves the production efficiency.

[0169] In some optional embodiments, the protection layer 60 and the pixel definition layer 70 are disposed in the same layer.

[0170] The display panel 10 provided by the embodiments of the present application is provided by the protection layer 60 and the pixel definition layer 70 disposed in the same layer, which reduces the process steps and further improves the production efficiency.

[0171] In some optional embodiments, the protection layer 60 and the pixel definition layer 70 are integrally formed.

[0172] The display panel 10 provided by the embodiments of the present application is provided by the protection layer 60 and the pixel definition layer 70 integrally formed, which further reduces the process steps and further improves the production efficiency.

[0173] In some optional embodiments, the protective layer 60 and the pixel definition layer 70 comprise inorganic materials.

[0174] The display panel 10 provided in the embodiments of the present application ensures the protection effect and improves the corrosion resistance of the second wiring portion 32 by setting the protective layer 60 and the pixel definition layer 70 as inorganic materials.

[0175] In some optional embodiments, the protective layer 60 comprises an organic material.

[0176] The display panel 10 provided in the embodiments of the present application can be set as an organic material, and the protective layer 60 can be set in the same layer and integrally formed with a planarization layer other than the first planarization layer 40, thereby further reducing the process steps and further improving the production efficiency.

[0177] In the display panel 10 provided in the embodiments of the present application, the pixel definition layer 70 is made of a dense inorganic material, such as silicon dioxide, silicon nitride, or indium tin oxide (ITO), etc. Compared with the material of the pixel definition layer 70 in the conventional technology, which is usually a loose organic material, the hole in the protective layer 60 set by the same organic material is easy to absorb and cause acid liquid residue when covering the second wiring portion 32, and due to the loose structure, the corrosion resistance of the organic material is weak, which cannot effectively resist the corrosion of chemicals and environmental conditions, and cannot make the display panel 10 maintain a longer stability and reliability.

[0178] In some embodiments, the display panel 10 further comprises an isolation structure 80 located at least in the display area 11 and set on the side of the pixel definition layer 70 away from the substrate 20, the isolation structure 80 encloses a separation opening 83, and the separation opening 83 and the pixel opening 71 at least partially overlap in the orthographic projection of the substrate 20.

[0179] The display panel 10 provided in the embodiments of the present application can separate the light-emitting material into a plurality of light-emitting units 72 by setting the isolation structure 80, thereby simplifying the process flow.

[0180] The distribution area and setting position of the isolation structure 80 are various, for example, the isolation structure 80 is located in the display area 11 of the display panel 10 and located on the side of at least part of the pixel opening 71, and the orthographic projection shape of the isolation structure 80 is also various, etc., as long as the isolation structure 80 does not cover the pixel opening 71 and does not affect the light-emitting display of the display panel 10.

[0181] Optionally, the isolation structure 80 is in a grid shape, for example, the isolation structure 80 encloses the isolation openings 83, and the orthographic projection of each pixel opening 71 on the substrate is located within the orthographic projection of the isolation opening 83 on the substrate. The isolation opening 83 and each pixel opening 71 are correspondingly arranged, so that the isolation structure 80 can be used to separate the light-emitting material into a plurality of independent light-emitting units 72, and the precise mask evaporation process can be omitted, and the preparation process of the display panel 10 is simplified. In the embodiments of the present application, the isolation structure 80 is in a grid shape, and in other embodiments, the shape of the isolation structure 80 is not limited.

[0182] The isolation structure 80 and the pixel definition layer 70 are located on the same side of the substrate, and the relative position relationship between the isolation structure 80 and the pixel definition layer 70 is not limited in the embodiments of the present application. For example, at least part of the isolation structure 80 can be arranged in the same layer as the pixel definition part, or the isolation structure 80 can be located on the side away from the substrate of the pixel definition part. In the embodiments of the present application, the isolation structure 80 is located on the side away from the substrate of the pixel definition part.

[0183] In some optional embodiments, the isolation structure 80 includes a first isolation part 81 and a second isolation part 82 arranged in sequence. The second isolation part 82 is located on the side away from the substrate 20 of the first isolation part 81, and the orthographic projection of the first isolation part 81 on the substrate 20 is located within the orthographic projection of the second isolation part 82 on the substrate 20.

[0184] The display panel 10 provided by the embodiments of the present application facilitates the preparation and mutual separation of the light-emitting units 72 corresponding to different isolation openings 83 by arranging the second isolation part 82.

[0185] The isolation structure 80 includes a first isolation part 81 and a second isolation part 82, and the orthographic projection of the first isolation part 81 on the substrate 20 is located within the orthographic projection of the second isolation part 82 on the substrate 20, that is, the cross-sectional size of the first isolation part 81 is smaller than the cross-sectional size of the second isolation part 82, so that the second isolation part 82 can form a concave structure, and the light-emitting material can be conveniently separated into independently arranged light-emitting units 72 at the edge of the isolation part. For example, the longitudinal section of the isolation structure 80 can be in a T shape.

[0186] In addition, the specific shape and size of the first isolation part 81 and the second isolation part 82 are not limited in the embodiments of the present application. Optionally, in the direction away from the substrate 20, the cross-sectional size of the first isolation part 81 gradually decreases, that is, the longitudinal section of the first isolation part 81 can be in a trapezoidal structure. Or, in the direction away from the substrate 20, the cross-sectional size of the first isolation part 81 gradually increases, that is, the longitudinal section of the first isolation part 81 can also be in an inverted trapezoidal structure, as long as the orthographic projection of the first isolation part 81 on the substrate 20 is located within the orthographic projection of the second isolation part 82 on the substrate 20.

[0187] In some optional embodiments, the first isolation part 81 is made of a conductive material, and the display panel 10 further comprises an electrode 90 located on the side of the light-emitting unit 72 away from the substrate, and the electrode 90 is connected to the first isolation part 81.

[0188] The isolation structure 80 is also located in the non-display area 12, and the first isolation part 81 of the isolation structure 80 in the non-display area 12 is connected to the wiring layer 30 through the pixel definition layer 70 and the first planarization layer 40.

[0189] The display panel 10 provided by the embodiments of the present application forms an electrical connection between the isolation structure 80 in the non-display area 12 and the wiring layer 30, and the isolation structure 80 can connect the electrode 90 circuit and the driving circuit part to the wiring layer 30, and the wiring layer 30 is connected to the DDIC arranged outside the display panel 10, so as to realize the transmission of control signals to the pixel structure and the driving circuit part.

[0190] In some embodiments, the display panel 10 further comprises a first encapsulation layer located in the display area 11 and the non-display area 12, and arranged on the side of the isolation structure 80 away from the substrate 20, and the second wiring part 32 is located in the projection of the first encapsulation layer on the substrate 20.

[0191] The display panel 10 provided by the embodiments of the present application realizes the overall encapsulation of the structure of the display panel 10 by arranging the first encapsulation layer.

[0192] Before the first encapsulation layer is manufactured, the second wiring part 32 is not covered by the first planarization layer 40 after the first planarization layer 40 is formed, and is exposed in the subsequent process, so that the second wiring part 32 is easy to be etched. By arranging the protection layer 60 to cover at least part of the second wiring part 32, the second wiring part 32 can be protected before the overall encapsulation of the structure of the display panel 10 is completed by manufacturing the first encapsulation layer.

[0193] In some embodiments, the wiring layer 30 comprises at least one of an ELVSS power line and an ELVDD power line.

[0194] The display panel 10 provided by the embodiments of the present application realizes the power supply control of the pixel circuit by connecting the ELVSS power line and the ELVDD power line of the wiring layer 30 to the DDIC.

[0195] The wiring layer 30 is at least one of an electroluminscent voltage source (ELVSS) power line and an electroluminscent voltage drain (ELVDD) power line in the light-emitting layer, and the ELVSS power line and the ELVDD power line are lines for supplying power to a pixel circuit of the light-emitting layer of the display panel 10.

[0196] In some optional embodiments, the protective layer 60 is provided with an opening above the first blocking part 41 after covering the first blocking part 41 and the second wiring part 32. The opening is reserved as a passage for gas or liquid, and prevents the protective layer 60 from covering the first blocking part 41 to form a closed structure, allowing gas or liquid to enter or exit, and avoiding accumulation and residue of gas or liquid generated by the organic material forming the first blocking part 41 in subsequent process procedures.

[0197] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , in the second aspect, another embodiment of the present application further provides a display panel 10, the display panel 10 includes a display area and a non-display area 12, and the display panel 10 further includes: a substrate 20; a first planarization layer 40 disposed on one side of the substrate 20 and located at least in the non-display area 12; a wiring layer 30 disposed on the side of the first planarization layer 40 close to the substrate 20 and located at least in the non-display area 12, the wiring layer 30 in the non-display area 12 includes a first wiring part 31 and a second wiring part 32, the first wiring part 31 is a part of the wiring layer 30 in the non-display area 12 covered by the first planarization layer 40, and the second wiring part 32 is a part of the wiring layer 30 in the non-display area 12 not covered by the first planarization layer 40; and a protective layer 60 disposed on the side of the first planarization layer 40 away from the substrate 20, and the protective layer 60 is in contact with at least part of the second wiring part 32.

[0198] The display panel 10 provided by the embodiments of the present application adopts the protective layer 60 in contact with at least part of the second wiring part 32 to protect the second wiring part 32 from electrochemical corrosion in subsequent process procedures.

[0199] Please refer to Figure 5 and Figure 6 , in some embodiments, the first wiring part 31 includes a top surface and a side wall, and the protective layer 60 includes a first part 61 and a second part 62, the first part 61 is in contact with at least part of the top surface, and / or the second part 62 is in contact with at least part of the side wall.

[0200] The display panel 10 provided in the embodiment of the present application can flexibly and selectively set the protective layer 60 to contact different positions of the second wiring portion 32 that is easily etched through the protective layer 60, thereby achieving precise coverage and improving the protection effect.

[0201] In some embodiments, the routing layer 30 is a composite film layer structure, including a first titanium metal layer 323, an aluminum metal layer 324, and a second titanium metal layer 325 stacked in sequence in a direction away from the substrate 20, and the second division 62 contacts at least a portion of the first titanium metal layer side wall 3231, the aluminum metal layer side wall 3241, and the second titanium metal layer side wall 3251, and / or the first division 61 contacts at least a portion of the top surface of the second titanium metal layer.

[0202] The display panel 10 provided in the embodiment of the present application is divided into a first section 61 and a second section 62 by setting a protective layer 60, which respectively contacts the side walls of different metal film layers in the second wiring portion 32 and the top surface 3252 of the second titanium metal layer located above the first titanium metal layer and the aluminum metal layer, thereby achieving more precise contact and improving the protection effect.

[0203] In some optional embodiments, the second portion contacts at least a portion of the first titanium metal layer sidewall 3231 and the aluminum metal layer sidewall 3241 .

[0204] The display panel 10 provided in the embodiment of the present application achieves further and more precise coverage of easily etched locations by setting the second portion 62 in contact with at least a portion of the first titanium metal layer sidewall 3231 and the aluminum metal layer sidewall 3241, further improving the protection effect.

[0205] See also Figure 2 、 Figure 3 and Figure 4 In some embodiments, the display panel 10 further includes a functional layer 100, the functional layer 100 includes a pixel definition layer 70 and a protective layer 60, the pixel definition layer 70 is arranged on the side of the first planarization layer 40 away from the substrate 20, the pixel definition layer 70 includes a pixel defining portion and a pixel opening 71 located in the display area, the pixel defining portion encloses the pixel opening 71, and the pixel opening 71 is used to accommodate the light-emitting unit 72.

[0206] The display panel 10 provided in the embodiment of the present application comprises a functional layer 100, which also includes a pixel definition layer 70. The pixel definition layer 70 is disposed on the same layer as the protective layer 60, thereby reducing process steps and improving production efficiency. The pixel defining portion of the pixel definition layer 70 located in the display area 11 encloses a pixel opening 71 to accommodate a light-emitting unit 72 of the display panel 10, thereby providing the light-emitting unit 72 with the light-emitting function of the display panel 10.

[0207] In some embodiments, the display panel 10 further comprises at least a separation structure 80 located at the display area 11, and arranged on the side of the pixel definition layer 70 away from the substrate 20. The separation structure 80 encloses a separation opening 83. The separation opening 83 and the pixel opening 71 at least partially overlap in the orthographic projection of the substrate 20.

[0208] The display panel 10 provided by the embodiments of the present application can separate the light-emitting material into a plurality of light-emitting units 72 by arranging the separation structure 80, thereby simplifying the process flow.

[0209] In some embodiments, the wiring layer 30 is within the orthographic projection of the functional layer 100 on the substrate 20.

[0210] The display panel 10 provided by the embodiments of the present application has the functional layer 100 covering the wiring layer 30, thereby improving the protection effect.

[0211] In some optional embodiments, the wiring layer 30 is within the orthographic projection of the protection layer 60 on the substrate 20.

[0212] The display panel 10 provided by the embodiments of the present application has the protection layer 60 covering the wiring layer 30, thereby further improving the protection effect.

[0213] In some embodiments, the display panel 10 further comprises a first encapsulation layer located at the display area 11 and the non-display area 12, and arranged on the side of the protection layer 60 and the separation structure 80 away from the substrate 20. The orthographic projection of the second wiring portion 32 on the substrate 20 is within the orthographic projection of the first encapsulation layer on the substrate 20.

[0214] The display panel 10 provided by the embodiments of the present application can complete the overall encapsulation of the structure of the display panel 10 by arranging the first encapsulation layer.

[0215] In a third aspect, the embodiments of the present application further provide a display device comprising the display panel 10 of any of the above embodiments. Since the display device provided by the embodiments of the present application comprises the display panel 10 of any of the above embodiments, the display device provided by the second aspect of the embodiments of the present application has the beneficial effects of the display panel 10 of any of the first aspect embodiments, which will not be described here.

[0216] The display device in the embodiments of the present application includes but is not limited to a mobile phone, a personal digital assistant (PDA), a tablet computer, an e-book, a television, an access control, a smart fixed phone, a console, and other devices with display functions.

[0217] Please refer to Figure 11 In a fourth aspect, the embodiments of the present application further provide a display panel 10 preparation method, comprising:

[0218] S100, providing a substrate 20.

[0219] The substrate 20 mainly plays a supporting role in the display panel 10, and other film layers are sequentially stacked on the substrate 20.

[0220] S200, manufacturing a wiring layer 30 on one side of the substrate 20.

[0221] The wiring layer 30 is at least located in the non-display area 12, and the wiring in the wiring layer 30 needs to pass through the non-display area 12 to connect the DDIC with the circuit in the display area 11.

[0222] S300, manufacturing a first planarization layer 40 away from the substrate 20 on the side of the wiring layer 30.

[0223] The display panel 10 is planarized in the display area 11, which facilitates the subsequent process flow, prevents physical damage to the display area 11 by external factors in the non-display area 12, and effectively isolates the display area 11 from the outside world, reducing the influence of external factors on the display area 11.

[0224] S400, patterning the first planarization layer 40 to expose at least part of the wiring layer 30.

[0225] The covering relationship between the first planarization layer 40 and the wiring layer 30 divides the wiring layer 30 into a first wiring part 31 and a second wiring part 32. The first wiring part 31 is the part of the wiring layer 30 in the non-display area 12 that is covered by the first planarization layer 40, and the second wiring part 32 is the part of the wiring layer 30 in the non-display area 12 that is not covered by the first planarization layer 40. The second wiring part 32 is easily affected and etched in the subsequent process.

[0226] S500, manufacturing a protection layer 60 away from the substrate 20 on the side of the first planarization layer 40.

[0227] The protection layer 60 is manufactured to cover the second wiring part 32 to protect the second wiring part 32 from electrochemical corrosion in the subsequent process.

[0228] S600, patterning the protection layer 60.

[0229] The protection layer 60 is patterned to form a more precise pattern to cover at least part of the second wiring part 32 to protect the second wiring part 32, which improves the protection effect without significantly increasing the thickness of the non-display area 12.

[0230] Please refer to Figure 12 In some embodiments, the display panel 10 manufacturing method provided by the embodiments of the present application further includes, in step S500,

[0231] S501, manufacturing the pixel definition layer 70.

[0232] The pixel definition layer 70 includes a pixel defining part located in the display area 11 and a pixel opening 71, the pixel defining part circumscribes to form the pixel opening 71, and the pixel opening 71 is used to accommodate the light emitting unit 72.

[0233] The pixel definition layer 70 is manufactured in the same layer as the protective layer 60, which can reduce the process steps and improve the production efficiency.

[0234] Referring to Figure 13 In some optional embodiments, the display panel 10 manufacturing method provided by the embodiments of the present application further includes, in step S500,

[0235] S510, manufacturing the functional layer 100.

[0236] The functional layer 100 integrates the pixel definition layer 70 and the protective layer 60, further reducing the process steps and further improving the production efficiency.

[0237] S520, performing a patterning process on the functional layer 100 to form the pixel definition layer 70 and the protective layer 60.

[0238] The functional layer 100 processing is divided into different film layers, further reducing the process steps and further improving the production efficiency.

[0239] In some optional embodiments, the pixel definition layer 70 and the protective layer 60 are made of inorganic materials.

[0240] The functional layer 100 is made of inorganic materials, which ensures the protection effect and can improve the corrosion resistance of the second wiring part 32.

[0241] The pixel definition layer 70 is made of dense inorganic materials, such as silicon dioxide, silicon nitride, or indium tin oxide (ITO), etc. Compared with the materials used in the pixel definition layer 70 in the conventional technology, which are usually loose organic materials, the holes in the protective layer 60 made of the same organic materials are easy to absorb and cause acid liquid residues when covering the second wiring part 32. Moreover, due to the loose structure, the corrosion resistance of the organic materials is weak, and they cannot effectively resist the corrosion of chemicals and environmental conditions, and cannot make the display panel 10 maintain a longer stability and reliability.

[0242] Although the present application has been described with reference to preferred embodiments, various modifications can be made to the application without departing from the scope of the application. In particular, the technical features mentioned in the various embodiments can be combined in any way, provided that there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized by, The display panel comprises a display area and a non-display area, and further comprises: a substrate; a first planarization layer disposed on one side of the substrate and located at least in the non-display area; a trace layer located at least in the non-display area, the trace layer in the non-display area comprising a first trace portion and a second trace portion, the first trace portion being a portion of the trace layer in the non-display area covered by the first planarization layer, and the second trace portion being a portion of the trace layer in the non-display area not covered by the first planarization layer; a protective layer disposed on a side of the first planarization layer away from the substrate, the protective layer covering at least part of the second trace portion.

2. The display panel of claim 1, wherein, The second trace portion comprises a top surface and a sidewall, the protective layer covering at least part of the sidewall of the second trace portion, and / or the protective layer covering at least part of the top surface of the second trace portion; Preferably, the orthographic projection of the second trace portion on the substrate is located within the orthographic projection of the protective layer on the substrate.

3. The display panel of claim 2, wherein, The protective layer covers at least part of the sidewall of the second trace portion. Preferably, the trace layer is a composite film layer structure comprising multiple layers of metal films with different etching selectivity ratios, and the protective layer covers at least the sidewall of the metal film with the smallest etching selectivity ratio among the multiple layers of metal films from the sidewall of the second trace portion.

4. The display panel of claim 3, wherein, The trace layer comprises a first titanium metal layer, an aluminum metal layer and a second titanium metal layer stacked in sequence in a direction away from the substrate, and the protective layer covers at least part of the sidewall of the second trace portion and at least part of the sidewall of the aluminum metal layer.

5. The display panel of claim 4, wherein, The protective layer comprises a first sub-portion and a second sub-portion, the first sub-portion covering the sidewall of the first titanium metal layer, the sidewall of the aluminum metal layer and the sidewall of the second titanium metal layer, and / or the second sub-portion covering the top surface of the second titanium metal layer; Preferably, the first sub-portion covers the sidewall of the first titanium metal layer and the sidewall of the aluminum metal layer.

6. The display panel of claim 1, wherein, The trace layer comprises multiple sub-traces, and the sub-traces are spaced apart in a second direction in the non-display area; The protective layer has a patterned film layer structure comprising multiple protective sub-portions, and the protective sub-portions are spaced apart in the second direction in the non-display area, and the orthographic projection of the sub-traces on the substrate is located within the orthographic projection of the protective sub-portions on the substrate; Preferably, the orthographic projection of multiple sub-traces on the substrate is located within the orthographic projection of one protective sub-portion on the substrate; Preferably, the protective sub-portions correspond one-to-one to the sub-traces, and the orthographic projection of the sub-traces on the substrate is respectively located within the orthographic projection of the corresponding protective sub-portions on the substrate.

7. The display panel of claim 1, wherein the first planarization layer further comprises a first blocking portion disposed in the non-display area; the display panel further comprises a second planarization layer disposed on a side of the trace layer close to the substrate, and the second planarization layer further comprises a second blocking portion disposed in the non-display area; Preferably, the second blocking portion is disposed correspondingly to the first blocking portion, and the orthographic projection of the second blocking portion on the substrate is located within the orthographic projection of the first blocking portion on the substrate. Preferably, the non-display area comprises a lower frame area, the trace layer extends in the lower frame area along a direction from the display area to the non-display area, and covers part of the second blocking part; Preferably, the trace layer further comprises at least one of a first conductive layer and a second conductive layer, the first conductive layer is arranged on a side of the second planarization layer away from the substrate, and the second conductive layer is arranged between the first planarization layer and the second planarization layer; Preferably, the trace layer comprises the first conductive layer and the second conductive layer, the second conductive layer covers at least part of the sidewall of the first conductive layer, and / or, the second conductive layer covers at least part of the top surface of the first conductive layer; Preferably, the trace layer further comprises a third conductive layer and a third planarization layer, the third conductive layer is arranged on a side of the first planarization layer away from the substrate, the third planarization layer is arranged on a side of the third conductive layer away from the substrate, and the protective layer covers at least part of the third conductive layer in the non-display area which is not covered by the third planarization layer; Preferably, the trace layer comprises the first conductive layer and the third conductive layer, the third conductive layer covers at least part of the sidewall of the first conductive layer, and / or, the third conductive layer covers at least part of the top surface of the first conductive layer.

8. The display panel of claim 7, wherein, The first blocking part comprises a plurality of blocking sub-parts, and the plurality of blocking sub-parts are arranged in the non-display area along a direction from the display area to the non-display area, and the second trace part comprises the trace layer arranged between adjacent blocking sub-parts.

9. The display panel of claim 1, wherein, The display panel further comprises a pixel definition layer arranged on a side of the first planarization layer away from the substrate, the pixel definition layer comprises a pixel defining part and a pixel opening in the display area, the pixel defining part encloses the pixel opening, and the pixel opening is used to accommodate a light emitting unit; Preferably, the protective layer is arranged in the same layer as the pixel definition layer; Preferably, the protective layer is made of the same material as the pixel definition layer; Preferably, the protective layer is integrally formed with the pixel definition layer; Preferably, the protective layer and the pixel definition layer comprise inorganic materials; Preferably, the protective layer comprises organic materials; Preferably, the protective layer is arranged in the same layer as the planarization layer other than the first planarization layer.

10. The display panel of claim 9, wherein, The display panel further comprises an isolation structure at least in the display area, arranged on a side of the pixel definition layer away from the substrate, the isolation structure encloses an isolation opening, and the isolation opening and the pixel opening at least partially overlap in the orthographic projection of the substrate; Preferably, the isolation structure comprises a first isolation part and a second isolation part arranged in sequence, the second isolation part is located on a side of the first isolation part away from the substrate, and the orthographic projection of the first isolation part on the substrate is located within the orthographic projection of the second isolation part on the substrate; Preferably, the first isolation part has a conductive material, and the display panel further comprises an electrode, the electrode is located on a side of the light emitting unit away from the substrate, and the electrode is connected to the first isolation part. The isolation structure is also located in the non-display area, and the first isolation part of the isolation structure in the non-display area is connected with the trace layer through the pixel definition layer and the first planarization layer.

11. The display panel of claim 10, wherein, The display panel further comprises a first encapsulation layer located in the display area and the non-display area, and arranged on a side of the isolation structure away from the substrate, and the second trace part is located in the first encapsulation layer in the substrate orthographic projection.

12. The display panel of any one of claims 1 to 9, wherein, The trace layer comprises at least one of an ELVSS power line and an ELVDD power line.

13. A display panel comprising a substrate, the display panel comprising a display area and a non-display area, characterized in that, The display panel further comprises: a substrate; a first planarization layer arranged on a side of the substrate and located at least in the non-display area; a trace layer located at least in the non-display area, the trace layer in the non-display area comprising a first trace part and a second trace part, the first trace part being a part of the trace layer in the non-display area covered by the first planarization layer, and the second trace part being a part of the trace layer in the non-display area not covered by the first planarization layer; a protection layer arranged on a side of the first planarization layer away from the substrate, and in contact with at least part of the second trace part.

14. The display panel of claim 13, wherein, The first trace part comprises a top surface and a side wall, the protection layer comprises a first part and a second part, the first part is in contact with at least part of the top surface, and / or, the second part is in contact with at least part of the side wall; Preferably, the trace layer is a composite film layer structure comprising a first titanium metal layer, an aluminum metal layer and a second titanium metal layer arranged in sequence from the side of the substrate away from the substrate, the second part is in contact with at least part of the side wall of the first titanium metal layer, the aluminum metal layer and the second titanium metal layer, and / or, the first part is in contact with at least part of the top surface of the second titanium metal layer; Preferably, the second part is in contact with at least part of the side wall of the first titanium metal layer and the side wall of the aluminum metal layer.

15. The display panel of claim 13, wherein the display panel further comprises a functional layer comprising a pixel definition layer and the protection layer, the pixel definition layer being arranged on a side of the first planarization layer away from the substrate, the pixel definition layer comprising a pixel defining part located in the display area and a pixel opening, the pixel defining part enclosing the pixel opening, and the pixel opening being used to accommodate a light emitting unit; Preferably, the display panel further comprises an isolation structure located at least in the display area and arranged on a side of the pixel definition layer away from the substrate, the isolation structure enclosing an isolation opening, and the isolation opening and the pixel opening at least partially overlap in the substrate orthographic projection.

16. The display panel of claim 15, wherein, The trace layer in the substrate orthographic projection is within the functional layer in the substrate orthographic projection; Preferably, the second trace part in the substrate orthographic projection is within the protection layer in the substrate orthographic projection.

17. The display panel of claim 15, wherein, The display panel further comprises a first encapsulation layer located in the display area and the non-display area, and disposed on the side of the isolation structure away from the substrate, and the second trace part is located in the first encapsulation layer in the orthographic projection of the substrate.

18. A display device comprising: The display panel as claimed in any one of claims 1 to 17.

19. A display panel manufacturing method, comprising: The display panel comprises: providing a substrate and dividing the display panel into a display area and a non-display area; forming a trace layer on one side of the substrate, the trace layer being located at least in the non-display area; preparing a first planarization layer on the side of the trace layer away from the substrate; performing a patterning process on the first planarization layer to expose at least part of the trace layer, the trace layer comprising a first trace part and a second trace part, the first trace part being the part of the trace layer in the non-display area covered by the first planarization layer, and the second trace part being the part of the trace layer in the non-display area not covered by the first planarization layer; preparing a protection layer on the side of the first planarization layer away from the substrate; performing a patterning process on the protection layer to cover at least part of the second trace part.

20. The display panel manufacturing method of claim 19, wherein, In the step of preparing a protection layer on the side of the first planarization layer away from the substrate, a pixel definition layer is further prepared, the pixel definition layer comprising a pixel limiting part located in the display area and a pixel opening, the pixel limiting part enclosing the pixel opening, and the pixel opening being used to accommodate a light emitting unit. Preferably, in the step of preparing a protection layer on the side of the first planarization layer away from the substrate, further comprising: preparing a functional layer; performing a patterning process on the functional layer to form the pixel definition layer and the protection layer; Preferably, the material for preparing the functional layer comprises an inorganic material.

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