Display panel, preparation method of display panel and display device

Abstract

The invention discloses a display panel, a preparation method of the display panel and a display device, and relates to the technical field of display, the display panel comprises a substrate, a display unit, a blocking dam body, a packaging layer and a signal routing, the substrate is divided into a display area and a non-display area, the display unit is arranged in the display area, the blocking dam body is arranged in the non-display area, and the packaging layer is arranged in the non-display area. The blocking dam body is arranged in the non-display area and surrounds the display area; the packaging layer covers the display unit and the blocking dam body, the signal line is arranged on one side, far away from the blocking dam body, of the packaging layer, a first connecting hole is formed in the position, corresponding to the blocking dam body, of the packaging layer in the direction perpendicular to the substrate in a penetrating mode, and a second connecting hole is formed in the position, corresponding to the blocking dam body, of the packaging layer and penetrates through the packaging layer in the direction perpendicular to the substrate. The signal wire passes through the first connecting hole, and the blocking dam body is conducted with a connecting wire connected with a binding area of the display panel; through the above design, the signal wiring is prevented from being broken.

Description

Technical Field

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

[0002] At present, the thin film encapsulation (Thin Film Encapsulation, referred to as TFE) flexible packaging route of the Fine Metal Mask (FMM) route is very mature; however, in order to achieve higher pixels and performance effects, the industry is currently developing a mass production of overhanging structure mask-free OLED process route.

[0003] Because there is a blocking dam on the periphery of the display panel, which is used to block the leveling of the organic encapsulation layer; the first inorganic encapsulation layer and the second inorganic encapsulation layer cover the blocking dam, and an undercut structure or a semi-air undercut structure is formed at the blocking dam. As a result, the metal lines of the subsequent signal routing process will be broken when crossing the blocking dam.

[0004] Therefore, this is an issue that needs to be addressed urgently. Summary of the invention

[0005] The purpose of the present application is to provide a display panel, a method for manufacturing a display panel, and a display device that avoids disconnection of signal wiring.

[0006] The present application discloses a display panel, comprising a substrate, a display unit, a blocking dam, a packaging layer and a signal routing line, wherein the substrate is divided into a display area and a non-display area, the display unit is arranged in the display area, the blocking dam is arranged in the non-display area and surrounds the display area; the packaging layer covers the display unit and the blocking dam, and the signal routing line is arranged on a side of the packaging layer away from the blocking dam, wherein a first connecting hole is formed through the packaging layer in a direction perpendicular to the substrate, and the signal routing line is connected through the first connecting hole and the connecting line connecting the blocking dam and the binding area of ​​the display panel.

[0007] Optionally, the blocking dam includes a blocking base and a blocking structure, the blocking base is arranged on the substrate, the blocking structure is arranged on a side of the blocking base away from the substrate, the blocking structure includes a conductive layer and a shielding layer stacked in sequence, and the shielding layer is made of a conductive material; a second connecting hole is formed on the blocking base corresponding to the blocking structure through a direction perpendicular to the substrate, and the signal routing is conductive through the first connecting hole, the shielding layer, the conductive layer and the second connecting hole and the connecting line connected to the binding area of ​​the display panel.

[0008] Optionally, the blocking dam includes a blocking base and a blocking structure, the blocking base is arranged on the substrate, the blocking structure is arranged on a side of the blocking base away from the substrate, the blocking structure includes a conductive layer and a shielding layer stacked in sequence, and the shielding layer is made of a non-conductive material; a second connecting hole is formed on the blocking base corresponding to the blocking structure through a direction perpendicular to the substrate, and a third connecting hole is formed on the shielding layer through a direction perpendicular to the substrate, and the signal routing is conductively connected to the connecting line connected to the binding area of ​​the display panel through the first connecting hole, the third connecting hole, the conductive layer and the second connecting hole.

[0009] Optionally, the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence, and the first connection hole is arranged on the first inorganic encapsulation layer and the second inorganic encapsulation layer; the blocking base includes a stacked passivation layer, a connecting wire, a metal wiring layer and a pixel definition layer, the connecting wire is arranged between the gold layer wiring layer and the substrate, and is electrically connected to the metal wiring layer, the pixel definition layer penetrates along a direction perpendicular to the substrate to form the second connection hole, the metal wiring layer is partially exposed at the second connection hole, and the conductive layer is partially arranged in the second connection hole.

[0010] Optionally, the blocking structure includes a first blocking structure and a second blocking structure, and the first blocking structure and the second blocking structure are arranged at intervals along the direction from the display area to the non-display area, the first blocking structure is arranged on a side of the second blocking structure close to the display area, and the first connecting hole and the second connecting hole are both arranged corresponding to the first blocking structure; wherein, the number of the first blocking structures is multiple, and the multiple first blocking structures are arranged around the display area at intervals, and the second blocking structure is arranged around the non-display area at least once without interruption.

[0011] Optionally, the blocking structure includes a plurality of first blocking structures and a plurality of second blocking structures, and the first blocking structures and the second blocking structures are arranged at intervals along the direction from the display area to the non-display area, the first blocking structure is arranged on a side of the second blocking structure close to the display area, the first connection hole includes a first sub-connection hole and a second sub-connection hole, the second connection hole includes a third sub-connection hole and a fourth sub-connection hole, the first sub-connection hole and the third sub-connection hole are arranged corresponding to the first blocking structure, and the second sub-connection hole and the fourth sub-connection hole are arranged corresponding to the second blocking structure; wherein, the plurality of first blocking structures and the plurality of second blocking structures are arranged at intervals around the display area for at least one circle, and the display panel also includes a first blocking dam, the first blocking dam is arranged on a side of the second blocking structure away from the first blocking structure, and the first blocking dam is arranged uninterruptedly around the second blocking structure for at least one circle.

[0012] Optionally, a plurality of the first blocking structures are arranged in parallel around the display area; or a plurality of the first blocking structures are arranged in a staggered manner around the display area.

[0013] Optionally, a plurality of the first blocking structures and a plurality of the second blocking structures are arranged in parallel around the display area; or a plurality of the first blocking structures and a plurality of the second blocking structures are arranged in a staggered manner around the display area.

[0014] The present application also discloses a method for preparing a display panel, which is used for the display panel as described above, comprising the steps of:

[0015] providing a substrate;

[0016] Dividing the substrate into a display area and a non-display area;

[0017] forming a display unit on the substrate corresponding to the display area;

[0018] forming a blocking dam on the substrate corresponding to the non-display area;

[0019] forming an encapsulation layer above the display unit and the blocking dam;

[0020] Etching the encapsulation layer at a position corresponding to the blocking dam body by a process to form a first connecting hole;

[0021] A signal line is arranged above the packaging layer, so that the signal line is connected through the first connection hole, the blocking dam body and the connection line connecting the binding area of ​​the display panel.

[0022] The present application also discloses a display device, comprising the display panel as described above.

[0023] Compared with the prior art where the first inorganic encapsulation layer and the second inorganic encapsulation layer cover the overhanging structure, an undercut structure or a half-empty undercut structure is formed at the overhanging structure, which causes the metal line of the subsequent touch control process to cross the overhanging structure and break, the substrate of the display panel of the present application is divided into a display area and a non-display area, the display unit is arranged in the display area, the blocking dam is arranged in the non-display area, and is arranged around the display area; the encapsulation layer covers the display unit and the blocking dam, and the signal routing is arranged on the side of the encapsulation layer away from the blocking dam, wherein the upper edge of the encapsulation layer penetrates through the direction perpendicular to the substrate to form a The first connecting hole is used for conducting the signal line through the connecting line connected to the binding area of ​​the display panel through the first connecting hole and the blocking dam. In this way, when the entire packaging film layer of the display panel is completed and the signal line connection is arranged outside the packaging film layer, the blocking structure can be used as a bridge part of the signal line. The signal line directly passes through the first connecting hole opened in the packaging layer above the blocking structure, and is connected to the connecting line connected to the binding area of ​​the display panel by using the blocking structure. The signal can be normally connected and output without crossing the blocking dam, thereby avoiding the problem of the signal line being easily broken when crossing the blocking dam, thereby improving the reliability of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 It is a schematic diagram of a structure in which an inorganic encapsulation layer is formed above a barrier dam in the prior art;

[0026] Figure 2 yes Figure 1 A schematic diagram of the local enlarged structure of the middle A area;

[0027] Figure 3 It is a schematic diagram of the block diagram structure of the display device provided by the present application;

[0028] Figure 4 is a partial top view structural schematic diagram of a display panel provided by the present application;

[0029] Figure 5 yes Figure 4 A schematic diagram of the local enlarged structure of the middle B area;

[0030] Figure 6 yes Figure 5 A schematic cross-sectional view of the first embodiment along the cross-sectional line CC';

[0031] Figure 7 yes Figure 5 A schematic diagram of the cross-sectional structure along the cross-sectional line D-D';

[0032] Figure 8 yes Figure 6 Schematic diagram of the structure in the unpackaged state;

[0033] Fig. 9 is a schematic diagram of a top view of the structure of a display panel provided in the first embodiment of the present application;

[0034] Fig.10 is a schematic diagram of the process steps of the method for preparing a display panel provided in the first embodiment of the present application;

[0035] Fig.11 yes Fig.10 A schematic flow chart of further steps of step S4;

[0036] Fig.12 yes Fig.11 A schematic diagram of a further step flow chart of step S43;

[0037] Fig.13 yes Fig.12 A schematic diagram of a further step flow chart of step S44;

[0038] Fig.14 yes Fig.10 A schematic flow chart of further steps of step S6;

[0039] Fig.15 is a schematic diagram of a partial cross-sectional structure of a display panel provided in a second embodiment of the present application;

[0040] Fig.16 is a partial top view structural schematic diagram of a display panel provided in a third embodiment of the present application;

[0041] Fig.17 is a partial top view structural schematic diagram of a display panel provided in a fourth embodiment of the present application;

[0042] Fig.18 yes Fig.17 A schematic diagram of the cross-sectional structure along the cross-sectional line E-E';

[0043] Fig.19 yes Fig.18 Schematic diagram of the structure in the encapsulation completed state.

[0044] Among them, 10, display device; 100, display panel; 110, substrate; 111, display area; 112, non-display area; 113, display unit; 120, blocking dam; 121, blocking base; 122, blocking structure; 123, conductive layer; 124, shielding layer; 125, third connection hole; 126, first blocking structure; 127, second blocking structure; 128, first conductive layer; 129, first shielding layer; 130, second conductive layer; 131, second shielding layer; 140, encapsulation layer; 141, first inorganic encapsulation layer; 142, second inorganic encapsulation layer; 143, first connection hole; 144, first sub-connection hole; 145, second sub-connection hole; 150, passivation layer; 160, Metal wiring layer; 170, pixel definition layer; 171, second connection hole; 172, third sub-connection hole; 173, fourth sub-connection hole; 174, first pixel definition part; 175, second pixel definition part; 176, third pixel definition part; 180, connection area; 181, first connection area; 182, second connection area; 190, connection line; 200, signal wiring; 210, touch signal line; 220, detection signal line; 230, connection line at the input end; 240, connection line at the output end; 300, organic encapsulation layer; 400, channel; 410, first channel; 420, second channel; 430, third channel; 500, first blocking dam; 510, second blocking dam; 600, punching area. DETAILED DESCRIPTION

[0045] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0046] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. In addition, the terms "upper", "lower", "left", "right", "second direction", "first direction", etc. indicating the orientation or position relationship are described based on the orientation or relative position relationship shown in the accompanying drawings, and are only for the convenience of describing the simplified description of the present application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0047] Figure 3is a schematic diagram of the block diagram of the display device provided by the present application, Figure 4 is a partial top view structural diagram of a display panel provided in the present application, Figure 5 yes Figure 4 The schematic diagram of the local enlarged structure of the B area is as follows: Figure 3-Figure 5 As shown, the present application discloses a display device 1010, including a substrate 110, a display unit 113, a blocking dam 120, an encapsulation layer 140 and a signal line 200, wherein the substrate 110 is divided into a display area 111 and a non-display area 112, the display unit 113 is arranged in the display area 111, the blocking dam 120 is arranged in the non-display area 112 and is arranged around the display area 111; the encapsulation layer 140 covers the display unit 113 and the blocking dam 120, and the signal line 200 is arranged on a side of the encapsulation layer 140 away from the blocking dam 120, wherein a first connection hole 143 is formed through the encapsulation layer 140 in a direction perpendicular to the substrate 110, and the signal line 200 is connected through the first connection hole 143, the blocking dam 120 and the connection line 190 connected to the binding area of ​​the display panel 100.

[0048] like Figure 1-Figure 2As shown, the blocking structure 122 in the existing display panel 100 is similar to a mushroom body structure, the conductive layer 123 is similar to the mushroom stem of the mushroom body, and the shielding layer 124 is similar to the mushroom cap located above the mushroom stem. The structural features between the conductive layer 123 and the shielding layer 124 easily lead to the formation of an undercut structure or a semi-air package undercut structure in the area between the conductive layer 123 and the two sides of the shielding layer 124 when the first inorganic encapsulation layer 141 and the second inorganic encapsulation layer 142 are encapsulated after the light-emitting layer and the cathode are evaporated. The inventor of the present application has found that such a design will have a problem of wire breakage when the metal line of the subsequent touch control process crosses the blocking dam structure. Therefore, in order to avoid the problem of wire breakage of the signal line 200, the present application improves the blocking structure 122. Specifically, the substrate 110 of the display panel 100 of the present application is divided into a display area 111 and a non-display area 112, the display unit 113 is arranged in the display area 111, and the blocking dam body 120 is arranged in the non-display area 112 and surrounds the display area 111. The encapsulation layer 140 covers the display unit 113 and the blocking dam 120, and the signal line 200 is arranged on the side of the encapsulation layer 140 away from the blocking dam 120, wherein a first connection hole 143 is formed through the encapsulation layer 140 in a direction perpendicular to the substrate 110, and the signal line 200 is connected to the connection line 190 connected to the binding area of ​​the display panel 100 through the first connection hole 143 and the blocking dam 120. In this way, when the entire encapsulation film layer of the display panel 100 is completed, the signal line 200 is arranged outside the encapsulation film layer. When the signal line 200 is connected, the blocking structure 122 can be used as a bridge part of the signal line 200. After the signal line 200 directly passes through the first connection hole 143 opened in the packaging layer 140 above the blocking structure 122, it is connected to the connection line 190 connected to the binding area of ​​the display panel 100 by using the blocking structure 122. The signal can be normally connected and output without crossing the blocking dam body 120, thereby avoiding the problem of the signal line 200 being easily disconnected when crossing the blocking dam body 120, thereby improving the reliability of the display panel 100.

[0049] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0050] First embodiment:

[0051] Figure 6 yes Figure 5 A schematic cross-sectional view of the first embodiment along the cross-sectional line CC', Figure 7 yes Figure 5 Schematic diagram of the cross-sectional structure along the section line D-D', combined with Figure 6-Figure 7It can be seen that the signal trace 200 includes a touch signal line 210, the blocking dam 120 includes a blocking base 121 and a blocking structure 122, the blocking base 121 is arranged on the substrate 110, the blocking structure 122 is arranged on the side of the blocking base 121 away from the substrate 110, the blocking structure 122 includes a conductive layer 123 and a shielding layer 124 stacked in sequence, and the shielding layer 124 is made of a conductive material; the encapsulation layer includes a flat layer, and a second connection hole 171 is formed on the blocking base 121 corresponding to the blocking structure 122 in a direction perpendicular to the substrate 110, and the encapsulation layer 140 includes a first inorganic encapsulation layer 141, an organic encapsulation layer 30 stacked in sequence. 0 and a second inorganic packaging layer 142, the first connection hole 143 is arranged on the first inorganic packaging layer 141 and the second inorganic packaging layer 142, the blocking base 121 includes a passivation layer 150, a metal wiring layer 160 and a pixel definition layer 170 stacked, the connection line 190 connected to the binding area of ​​the display panel 100 is arranged between the gold layer wiring layer and the substrate 110, and is electrically connected to the metal wiring layer 160, the pixel definition layer 170 penetrates along a direction perpendicular to the substrate 110 to form the second connection hole 171, the metal wiring layer 160 is partially exposed at the second connection hole 171, and the conductive layer 123 is partially arranged in the second connection hole 171.

[0052] That is, the conductive layer 123 is electrically connected to the metal wiring layer 160 to form a connection area 180, and is connected to the connection line 190 below the metal wiring layer 160 through the connection area 180. Figure 8 The touch signal line 210 overlaps the conductive layer 123 from above the shielding layer 124 through the first connection hole 143, and then connects to the metal wiring layer 160 inside through the second connection hole 171 on the pixel definition layer 170, and then connects to the connection line 190 of the binding part of the display panel 100, and then connects to the driving end through the connection line 190 for receiving and outputting signals.

[0053] The blocking structure 122 includes a first blocking structure 126 and a second blocking structure 127, the first blocking structure 126 includes a first conductive layer 128 and a first blocking layer 129 stacked in sequence, the second blocking structure 127 includes a second conductive layer 130 and a second blocking layer 131 stacked in sequence, and along the direction of the display area 111 pointing to the non-display area 112, the first blocking structure 126 and the second blocking structure 127 are arranged at intervals, the first blocking structure 126 is arranged on a side of the second blocking structure 127 close to the display area 111, and the first connecting hole 143 and the second connecting hole 171 are both arranged corresponding to the first blocking structure 126; wherein, the number of the first blocking structures 126 is multiple, and the multiple first blocking structures 126 are arranged around the display area 111 at intervals, and the second blocking structure 127 is arranged around the non-display area 112 at least once in an uninterrupted manner.

[0054] In this way, after the subsequent touch signal lines 210 of the display panel 100 are arranged above the packaging layer 140, they can be connected respectively through the first connection holes 143 of the first blocking structure 126, which facilitates the subsequent arrangement of the touch signal lines 210. In addition, multiple first blocking structures 126 are arranged in parallel around the display area 111, and a channel 400 is formed between two adjacent first blocking structures 126. When the organic packaging material of the organic packaging layer 300 is inkjet printed, the organic packaging material can flow in a direction away from the display area 111 through the channel 400, which can divert part of the organic packaging material, which is beneficial to the curing speed of the organic packaging layer 300 in the display area 111. On the side of the first blocking structure 126 away from the display area 111, a second blocking structure 127 is continuously arranged in a whole circle, which can be used to block the printing and packaging of the organic packaging material and prevent the overflow of the organic packaging printing material.

[0055] Along the direction from the display area 111 to the non-display area 112, the width of the surface where the conductive layer 123 abuts against the shielding layer 124 is smaller than the width of the shielding layer 124. The width of the shielding layer 124 is assumed to be H1, and the diameter of the first connection hole 143 is assumed to be h1, wherein 1 / 3H1≦h1<1 / 2H1. This ensures that the touch signal line 210 is connected through the first connection hole 143, and that the opening of the first connection hole 143 on the encapsulation layer 140 is not too large. There is enough encapsulation layer 140 to cover the shielding layer 124, and after the touch signal line 210 is overlapped and matched, a sealed state is formed to avoid the invasion of water and oxygen.

[0056] Assume that the width of the surface where the conductive layer 123 abuts against the pixel definition layer 170 is H12, and the diameter of the second connection hole 171 is h2, wherein 1 / 4H2≦h2<1 / 3H2, thereby reducing the exposed area of ​​the metal wiring layer 160 and ensuring the abutment area of ​​the conductive layer 123 against the upper surface of the pixel definition layer 170, thereby ensuring the overall stability of the blocking structure 122 on the pixel definition layer 170.

[0057] The first connection hole 143 and the second connection hole 171 can both be round holes, so that the hole digging process can be more direct and convenient. Of course, the first connection hole 143 and the second connection hole 171 can also be rectangular holes or polygonal holes. The specific design is based on actual needs and is not limited here.

[0058] like Figure 6-Figure 7 As shown, a first blocking dam 500 can also be set at the edge of the non-display area 112. The first blocking dam 500 is set on the side of the second blocking structure 127 away from the first blocking structure 126. The first blocking dam 500 is set around the second blocking structure 127 in an uninterrupted circle, which can further prevent the overflow of the organic package during printing, and also prevent the edge of the display panel 100 package from water and oxygen intrusion. The first blocking dam 500 is formed by a passivation layer 150, a pixel definition layer 170, a conductive layer 123 and a shielding layer 124 stacked in sequence. Of course, a second blocking dam 510 can also be set on the side of the first blocking dam 500 away from the display area 111 to further prevent the overflow of the organic packaging material and the invasion of water and oxygen at the edge. Of course, the number of blocking dams set in the non-display area 112 away from the second blocking structure 127 is designed according to the specific display panel 100, and is not limited here.

[0059] Combination Figure 6 and Figure 8 After the process of the blocking structure 122 is completed, the display area 111 and the non-display area 112 are stacked and packaged with the first inorganic packaging layer 141, the organic packaging layer 300 and the second inorganic packaging layer 142. Since the film layers are uneven to form a stacked structure, if cracks appear in the film layers after the subsequent packaging film layers are packaged, it is easy to cause external water and oxygen to enter from the cracks and affect the internal light-emitting devices or metal connecting lines 190, thereby affecting the quality of the display panel 100. Therefore, a detection signal line 220 can be set after the packaging is completed for crack detection. Specifically, Fig. 9 is a schematic diagram of a top view of the structure of a display panel 100 provided in the first embodiment of the present application. Fig. 9As shown, the signal routing 200 also includes a detection signal line 220, which is arranged between the display area 111 and the non-display area 112, and can utilize two first blocking structures 126 therein. The output end of the detection signal line 220 is connected to one of the first blocking structures 126, and the input end of the detection signal line 220 is connected to the other first blocking structure 126, which are respectively connected to the driving signal end for detecting whether there is a crack at that location. If a crack occurs, the detection signal line 220 arranged at that location will be short-circuited, thereby being able to determine whether a crack occurs.

[0060] Among them, the metal layer of the detection signal line 220 and the metal layer of the touch signal line 210 use the same metal film layer, so that the process will not be increased. After the detection signal line 220 is set in a circle, it needs to be connected to the two first blocking structures 126 respectively through two overlapping holes. Therefore, there is no detection signal line 220 between the two overlapping holes. If a crack occurs here, it cannot be detected. Therefore, the number of the detection signal lines 220 can be set to multiple, and the multiple detection signal lines 220 are staggered. Then, two connectable blocking structures 122 are added on the side of the first blocking structure 126 close to the display area 111 or on the side away from the display area 111 for connection. Of course, the detection signal line 220 can also be set to only one, and it can be set at a position where cracks are prone to occur. The specific design is based on the actual situation of the display panel 100, which will not be repeated here.

[0061] Fig.10 is a schematic diagram of the process steps of the method for preparing a display panel provided in the first embodiment of the present application, such as Fig.10 As shown, the present application also discloses a method for preparing a display panel, which is used for the display panel as described above, comprising the steps of:

[0062] S1: providing a substrate;

[0063] S2: dividing the substrate into a display area and a non-display area;

[0064] S3: forming a display unit on the substrate corresponding to the display area;

[0065] S4: forming a blocking dam on the substrate corresponding to the non-display area;

[0066] S5: forming an encapsulation layer above the display unit and the blocking dam;

[0067] S6: etching the encapsulation layer at a position corresponding to the blocking dam using a process to form a first connection hole;

[0068] S7: Arranging signal wiring above the packaging layer, so that the signal wiring is connected through the first connection hole, the blocking dam body and the connection line connecting the binding area of ​​the display panel.

[0069] Fig.11 yes Fig.10 A further step flow diagram of step S4 in FIG. Fig.11 As shown, the step of forming a blocking dam on the substrate corresponding to the non-display area includes the following steps:

[0070] S41: forming a passivation layer, a connection metal layer and a pixel definition layer stacked in sequence on the substrate corresponding to the non-display area to form a blocking base;

[0071] S42: etching the pixel definition layer using a process to form a second connection hole on the pixel definition layer;

[0072] S43: forming a conductive layer and a shielding layer in sequence on the pixel definition layer at a position corresponding to the second connection hole to form a blocking structure.

[0073] Fig.12 yes Fig.11 A further step flow diagram of step S43 in FIG. Fig.12 As shown, the step of sequentially forming a conductive layer and a shielding layer on the pixel definition layer at a position corresponding to the second connection hole to form a blocking structure further includes the steps of:

[0074] S44: corresponding to the third sub-connection hole, sequentially forming a first conductive layer and a first shielding layer stacked on the pixel definition layer to form a first blocking structure;

[0075] S45: corresponding to the fourth sub-connection hole, forming a second conductive layer and a second shielding layer stacked on the pixel definition layer to form a second blocking structure.

[0076] Fig.13 yes Fig.12 A further step flow diagram of step S44 is shown in FIG. Fig.13 As shown, the step of sequentially forming a first conductive layer and a first shielding layer stacked on the pixel definition layer to form a first blocking structure corresponding to the third sub-connection hole further includes the following steps:

[0077] S46: etching part of the first blocking layer and part of the first conductive layer along a direction perpendicular to the substrate using a process to form a plurality of first blocking structures arranged at intervals.

[0078] Fig.14 yes Fig.10 A further step flow diagram of step S6 in FIG. Fig.14As shown, the step of forming an encapsulation layer above the display unit and the blocking dam body includes the steps of:

[0079] S62: forming a first inorganic encapsulation layer corresponding to the display area and the first blocking structure and the second blocking structure;

[0080] S63: forming an organic encapsulation layer on the first inorganic encapsulation layer corresponding to the display area;

[0081] S64: forming a second inorganic encapsulation layer on the organic encapsulation layer corresponding to the entire surface of the display area and the non-display area;

[0082] Therefore, in the step of etching the encapsulation layer at a position corresponding to the blocking dam to form the first connection hole using a process, it is necessary to etch the second inorganic encapsulation layer and the first inorganic encapsulation layer at a position corresponding to the blocking structure to form the first connection hole.

[0083] Second embodiment:

[0084] Fig.15 is a schematic diagram of a partial cross-sectional structure of a display panel provided in the second embodiment of the present application. Fig.15 As shown, as the second embodiment of the present application, this embodiment is different from the first embodiment in that the blocking structure 122 includes a plurality of first blocking structures 126 and a plurality of second blocking structures 127, and is arranged in a direction from the display area 111 to the non-display area 112, the first blocking structure 126 and the second blocking structure 127 are arranged at intervals, the first blocking structure 126 is arranged on a side of the second blocking structure 127 close to the display area 111, the first connection hole 143 includes a first sub-connection hole 144 and a second sub-connection hole 145, the second connection hole 171 includes a third sub-connection hole 172 and a fourth sub-connection hole 173, the first sub-connection hole 144 and the third sub-connection hole 172 are arranged corresponding to the first blocking structure 126, and the second sub-connection hole 145 and the fourth sub-connection hole 173 are arranged corresponding to the second blocking structure 127;

[0085] Among them, multiple first blocking structures 126 and multiple second blocking structures 127 are arranged at least one circle around the display area 111, and the display panel 100 also includes a first blocking dam 500, which is arranged on a side of the second blocking structure 127 away from the first blocking structure 126, and the first blocking dam 500 is arranged around the second blocking structure 127 without interruption for at least one circle.

[0086] That is, in the non-display area 112, two parallel columns of blocking structures 122 are provided for connecting the signal wiring 200, wherein the height of the first blocking structure 126 and the height of the second blocking structure 127 can be kept consistent to ensure that the organic encapsulation layer 300 is not prone to overflow across the blocking dam 120 during inkjet printing.

[0087] In this way, different connection areas 180 need to be formed on the pixel definition layer 170. Specifically, Fig.15 As shown, the pixel definition layer 170 includes a first pixel definition portion 174, a second pixel definition portion 175 and a third pixel definition portion 176, the second pixel definition portion 175 is arranged between the first pixel definition portion 174 and the third pixel definition portion 176, the first pixel definition portion 174 and the second pixel definition portion 175 are arranged at intervals through the third sub-connection hole 172 to form a first connection area 181, and the second pixel definition portion 175 and the third pixel definition portion 176 are arranged at intervals through the fourth sub-connection hole 173 to form a second connection area 182;

[0088] The connection metal layer includes a first connection metal layer and a second connection metal layer, wherein the first connection metal layer is partially exposed in the first connection area 181, and the second connection metal layer is partially exposed in the second connection area 182. The first blocking structure 126 is arranged corresponding to the first connection area 181, and the first conductive layer 128123 of the first blocking structure 126 is partially arranged in the first connection area 181, and connected to the first connection metal layer through the first connection area 181; the second blocking structure 127 is arranged corresponding to the second connection area 182, and the second conductive layer 130123 of the second blocking structure 127 is partially arranged in the second connection area 182, and connected to the second connection metal layer through the second connection area 182. In this way, every two signal wires 200 can be arranged at least partially overlapped, which appropriately reduces the space occupied by the layout of the signal wires 200.

[0089] Third embodiment:

[0090] Fig.16 is a partial top view of the structure of the display panel provided in the third embodiment of the present application. Fig.16As shown in the figure, as the third embodiment of the present application, this embodiment is different from the second embodiment in that a plurality of the first blocking structures 126 and a plurality of the second blocking structures 127 are staggeredly arranged around the display area 111, and from the top view, along the direction from the display area 111 to the non-display area 112, the staggered first blocking structures 126 and the second blocking structures 127 are also formed between the channel 400, that is, two first blocking structures 126 and one second blocking structure 127 are grouped together, a first channel 410 is formed between the first first blocking structure 126 and the second first blocking structure 126, and the first first blocking structure 126 is formed between the first first blocking structure 126 and the second first blocking structure 126. A second channel 420 is formed between the blocking structure 126 and the second blocking structure 127, and a third channel 430 is formed between the second first blocking structure 126 and the second blocking structure 127. When the organic encapsulation material reaches the first blocking structure 126, part of it first flows through the first channel 410 and is blocked by the second blocking structure 127, and the rest of it is diverted through the second channel 420 and the third channel 430 respectively, and then reaches the first blocking dam 500 and is blocked by the first blocking dam 500, thereby achieving a double mitigation effect to further avoid overflow of the organic encapsulation material printed with ink.

[0091] Fourth embodiment:

[0092] Fig.17 is a partial top view of the structure of a display panel provided in the fourth embodiment of the present application, Fig.18 yes Fig.17 Schematic diagram of the cross-sectional structure along the section line E-E', Fig.19 yes Fig.18 Schematic diagram of the structure of the package completion state, combined with Figure 17-Figure 19As the fourth embodiment of the present application, this embodiment is different from the first, second and third embodiments in that the display panel 100 further includes a perforated area 600 and a packaging area. The perforated area 600 is used for assembling a camera etc. after being perforated, and a packaging area is also required to be formed outside the perforated area 600 to prevent cracks in the film layer in this area after perforation. The packaging area is located on a side away from the perforated area 600. The packaging area is provided with at least one circle of second blocking dam 510 around the perforated area 600. The blocking dam body 120 includes a blocking base 121, a first blocking structure 126 and a second blocking structure 127. The first blocking structure 126 and the second blocking structure 127 are provided. On the blocking base 121, and arranged on the side of the second blocking dam 510 away from the punching area 600, and spaced around the second blocking dam 510, so that one end of the crack detection signal line 220 is connected to the input end of the crack detection sensor through the connecting line 230 connecting the first blocking structure 126, and the other end is connected to the output end of the crack detection sensor through the connecting line 240 connecting the second blocking structure 127, which is used for connecting the crack detection signal of the packaging area. The signal line 200 is also arranged around the second blocking dam 510, and the signal line 200 is connected to the metal layer inside through the blocking structure 122 to facilitate crack detection.

[0093] Of course, multiple first blocking structures 126 and multiple second blocking structures 127 can be arranged at intervals around the second blocking dam 510, so that the crack detection signal line 220 can be arranged above the multiple first blocking structures 126 and the multiple second blocking structures 127, and only connected to the input end through one of the first blocking structures 126, and connected to the output end through one of the second blocking structures 127. In this way, the wiring setting is more uniform and smooth, and the number and setting method of the signal wiring 200 can refer to the setting of the above-mentioned non-display area 112, which will not be repeated here.

[0094] Fifth embodiment:

[0095] As the fifth embodiment of the present application, this embodiment is different from the first embodiment in that the shielding layer 124 is made of non-conductive material. At this time, a third connecting hole 125 is formed on the shielding layer 124 along a direction perpendicular to the substrate 110, and the touch signal line 210 is connected to the connecting line 190 connected to the binding area of ​​the display panel 100 through the first connecting hole 143, the third connecting hole 125, the conductive layer 123 and the second connecting hole 171.

[0096] After the step of sequentially forming a conductive layer and a shielding layer on the pixel definition layer at a position corresponding to the second connection hole to form a blocking structure, the method further comprises the following steps:

[0097] S61: etching the blocking layer using a process to form a third connection hole on the blocking layer.

[0098] The other process steps are the same. After the touch signal line 210 is arranged, the connection line 190 connected to the binding area of ​​the display panel 100 through the first connection hole 143, the second connection hole 171, the conductive layer 123 and the second connection hole 171 can be conductive.

[0099] It should be noted that the limitations on the various steps involved in this solution, without affecting the implementation of the specific solution, are not deemed to limit the order of the steps. The steps written in front can be executed first, or later, or even simultaneously. As long as this solution can be implemented, it should be deemed to fall within the scope of protection of this application.

[0100] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0101] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The invention comprises a substrate, a display unit, a blocking dam, a packaging layer and a signal wiring, wherein the substrate is divided into a display area and a non-display area, the display unit is arranged in the display area, the blocking dam is arranged in the non-display area and surrounds the display area; The packaging layer covers the display unit and the blocking dam, and the signal wiring is arranged on a side of the packaging layer away from the blocking dam, wherein A first connection hole is formed on the packaging layer at a position corresponding to the blocking dam and penetrating the packaging layer in a direction perpendicular to the substrate. The signal line is connected through the first connection hole, the blocking dam and the connection line connecting the binding area of ​​the display panel.

2. The display panel according to claim 1, wherein: The blocking dam body comprises a blocking base and a blocking structure, wherein the blocking base is arranged on the substrate, the blocking structure is arranged on a side of the blocking base away from the substrate, the blocking structure comprises a conductive layer and a shielding layer stacked in sequence, and the shielding layer is made of a conductive material; A second connection hole is formed on the blocking base corresponding to the blocking structure in a direction perpendicular to the substrate, and the signal line is connected to the binding area of ​​the display panel through the first connection hole, the shielding layer, the conductive layer and the second connection hole.

3. The display panel according to claim 1, wherein: The blocking dam body comprises a blocking base and a blocking structure, wherein the blocking base is arranged on the substrate, the blocking structure is arranged on a side of the blocking base away from the substrate, the blocking structure comprises a conductive layer and a shielding layer stacked in sequence, and the shielding layer is made of a non-conductive material; A second connection hole is formed on the blocking base corresponding to the blocking structure and penetrates in a direction perpendicular to the substrate, and a third connection hole is formed on the blocking layer and penetrates in a direction perpendicular to the substrate. The signal line is connected to the binding area of ​​the display panel through the first connection hole, the third connection hole, the conductive layer and the second connection hole.

4. The display panel according to claim 2 or 3, characterized in that: The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence, and the first connection hole is provided on the first inorganic encapsulation layer and the second inorganic encapsulation layer; The blocking base includes a stacked passivation layer, a metal routing layer and a pixel definition layer. The connecting line connected to the binding area of ​​the display panel is arranged between the gold layer routing layer and the substrate, and is electrically connected to the metal routing layer. The pixel definition layer penetrates along a direction perpendicular to the substrate to form the second connection hole. The metal routing layer is partially exposed at the second connection hole, and the conductive layer is partially arranged in the second connection hole.

5. The display panel according to claim 4, wherein: The blocking structure includes a first blocking structure and a second blocking structure, and is arranged in a direction from the display area to the non-display area, the first blocking structure and the second blocking structure are arranged at intervals, the first blocking structure is arranged on a side of the second blocking structure close to the display area, and the first connection hole and the second connection hole are both arranged corresponding to the first blocking structure; There are multiple first blocking structures, and the multiple first blocking structures are arranged around the display area at intervals, and the second blocking structure is arranged around the non-display area continuously for at least one circle.

6. The display panel according to claim 4, wherein: The blocking structure includes a plurality of first blocking structures and a plurality of second blocking structures, and is arranged in a direction from the display area to the non-display area, the first blocking structure and the second blocking structure are arranged at intervals, the first blocking structure is arranged on a side of the second blocking structure close to the display area, the first connection hole includes a first sub-connection hole and a second sub-connection hole, the second connection hole includes a third sub-connection hole and a fourth sub-connection hole, the first sub-connection hole and the third sub-connection hole are arranged corresponding to the first blocking structure, and the second sub-connection hole and the fourth sub-connection hole are arranged corresponding to the second blocking structure; Among them, multiple first blocking structures and multiple second blocking structures are arranged at least one circle around the display area, and the display panel also includes a first blocking dam, which is arranged on a side of the second blocking structure away from the first blocking structure, and the first blocking dam is arranged at least one circle around the second blocking structure without interruption.

7. The display panel according to claim 5, wherein: A plurality of the first blocking structures are arranged in parallel around the display area; or A plurality of the first blocking structures are staggeredly arranged around the display area.

8. The display panel according to claim 6, wherein: A plurality of the first blocking structures and a plurality of the second blocking structures are arranged in parallel around the display area; or The plurality of first blocking structures and the plurality of second blocking structures are staggeredly disposed around the display area.

9. A method for preparing a display panel, used for preparing the display panel according to any one of claims 1 to 8, characterized in that: Includes steps: providing a substrate; Dividing the substrate into a display area and a non-display area; forming a display unit on the substrate corresponding to the display area; forming a blocking dam on the substrate corresponding to the non-display area; forming an encapsulation layer above the display unit and the blocking dam; Etching the encapsulation layer at a position corresponding to the blocking dam body by a process to form a first connecting hole; A signal line is arranged above the packaging layer, so that the signal line is connected through the first connection hole, the blocking dam body and the connection line connecting the binding area of ​​the display panel.

10. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-8.

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