A display panel

Abstract

The present application provides a display panel comprising a display area and a non-display area, including: a substrate; a driving circuit layer; a light-emitting element layer; a first dam; an encapsulation layer; a touch layer; and a plurality of touch traces; one end of the touch trace is electrically connected to the touch layer, and the other end is used to electrically connect to a touch chip; wherein a first notch is provided on the first dam; the touch trace passes through the first notch and extends from the side of the first dam close to the display area to the side of the first dam away from the display area. In a specific embodiment of the present application, the touch trace passes through the first notch and / or the second notch and extends from the side of the first dam close to the display area to the side of the first dam or the second dam away from the display area. The touch trace is routed through the first notch and / or the second notch without crossing the first dam and / or the second dam, which does not cause the touch trace to break or short circuit due to incomplete metal etching at the edge of the first dam and / or the second dam, thereby improving the yield of the touch process.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a display panel. Background Art

[0002] Mobile phones, tablet computers and other electronic devices are widely used in people's daily lives, including electronic devices with touch display modules. Since organic light-emitting diode display devices are easily corroded by water vapor, an encapsulation layer is generally made on the surface of the organic light-emitting diode substrate to isolate the organic light-emitting diode devices from external water vapor. In order to define the boundary of the organic encapsulation layer formed by inkjet printing, one or more dams are set near the boundary of the organic encapsulation layer to block the organic encapsulation layer formed by inkjet printing and prevent the organic encapsulation layer formed by inkjet printing from overflowing to the outside of the dam. However, the touch traces at the edge of the touch layer are easily broken or the metal etching at the edge of the dam is incomplete, resulting in a short circuit. Summary of the Invention

[0003] The main technical problem to be solved by the present application is that the dam causes the touch traces at the edge of the touch layer to be easily broken or the metal etching at the edge of the dam is incomplete, resulting in a short circuit.

[0004] To solve the above technical problems, a technical solution adopted in the present application is: a display panel including a display area and a non-display area, the display panel including:

[0005] substrate;

[0006] A driving circuit layer is provided on one side of the substrate;

[0007] a light-emitting element layer, provided on a side of the driving circuit layer away from the substrate and located in the display area;

[0008] a first dam, provided on one side of the substrate and located in the non-display area;

[0009] an encapsulation layer, covering at least the light-emitting element layer and the first dam;

[0010] A touch layer is provided on a side of the packaging layer away from the substrate and located in the display area;

[0011] A plurality of touch lines are provided on a side of the packaging layer away from the substrate; one end of the touch line is electrically connected to the touch layer, and the other end is used to be electrically connected to the touch chip;

[0012] A first gap is provided on the first dam; the touch line passes through the first gap and extends from a side of the first dam close to the display area to a side of the first dam far from the display area.

[0013] Preferably, the depth of the first notch is less than or equal to the height of the first dam.

[0014] Preferably, the width of the first notch is 1 μm to 4 μm;

[0015] Optionally, the first notch is arranged perpendicularly or obliquely relative to the extension direction of the first dam.

[0016] More preferably, the depth of the first notch is equal to the height of the first dam; the driving circuit layer has a first exposed portion exposed to the first notch; at the first notch, the encapsulation layer covers the side of the first exposed portion away from the substrate, and covers two oppositely disposed side surfaces of the first notch.

[0017] More preferably, the encapsulation layer arranged on the side of the first exposed portion away from the substrate is a flat structure, and the touch line is arranged on the side of the flat structure away from the substrate; the touch line passes through the flat structure and extends from the side of the first dam close to the display area to the side of the first dam away from the display area.

[0018] Preferably, the display panel further includes:

[0019] a second dam provided on one side of the substrate and located on a side of the first dam away from the display area or on a side of the first dam close to the display area;

[0020] A second notch is provided on the second dam; the touch line passes through the second notch and extends from a side of the second dam close to the display area to a side of the second dam away from the display area;

[0021] Optionally, the depth of the second notch is less than or equal to the height of the second dam;

[0022] Optionally, the width of the second notch is 1 μm to 4 μm;

[0023] Optionally, the second notch is arranged perpendicularly or obliquely relative to the extension direction of the second dam;

[0024] Optionally, the driving circuit layer has a second exposed portion exposed to the second notch, and at the second notch, the encapsulation layer covers a side of the second exposed portion away from the substrate, and covers two opposite side surfaces of the second notch;

[0025] Optionally, the encapsulation layer arranged on the side of the second exposed portion away from the substrate is a flat structure, and the touch line is arranged on the side of the flat structure away from the substrate; the touch line passes through the flat structure and extends from the side of the second dam close to the display area to the side of the second dam away from the display area.

[0026] More preferably, the second notch and the first notch are arranged in a one-to-one correspondence and are located on the same side of the display area, and each of the touch lines passes through the first notch and the second notch in sequence, extending from the side of the first dam close to the display area to the side of the second dam away from the display area.

[0027] More preferably, the correspondingly arranged second notch and the first notch are aligned in the first direction; or

[0028] The corresponding second notch and the first notch are staggered in the first direction. The touch line first passes through the first notch, then extends along the first direction, and then passes through the second notch.

[0029] Preferably, the light emitting element layer includes a plurality of organic light emitting diodes;

[0030] The encapsulation layer includes a first inorganic encapsulation layer, a second inorganic encapsulation layer and an organic encapsulation layer which are stacked, and the organic encapsulation layer is arranged between the first inorganic encapsulation layer and the second inorganic encapsulation layer;

[0031] The first dam is disposed around the display area.

[0032] More preferably, the second dam is disposed around the display area, and the second dam is disposed on a side of the first dam away from the display area.

[0033] Beneficial effects: The embodiment of the present application provides a display panel, comprising a display area and a non-display area, the display panel comprising: a substrate; a driving circuit layer; a light-emitting element layer; a first dam, provided on a side of the driving circuit layer away from the substrate and located in the non-display area; an encapsulation layer, covering at least the light-emitting element layer and the first dam; a touch layer, provided on a side of the encapsulation layer away from the substrate and located in the display area; a plurality of touch traces, provided on a side of the encapsulation layer away from the substrate; one end of the touch trace is electrically connected to the touch layer, and the other end is used to electrically connect to the touch chip; wherein a first notch is provided on the first dam; the touch trace passes through the first notch and extends from a side of the first dam close to the display area to a side of the first dam away from the display area. In a specific embodiment of the present application, the touch trace passes through the first notch and / or the second notch and extends from a side of the first dam close to the display area to a side of the first dam or the second dam away from the display area. The touch line is routed through the first notch and / or the second notch without crossing the first dam and / or the second dam, which will not cause the touch line to break or the metal etching at the edge of the first dam and / or the second dam to be incomplete and cause a short circuit, thereby improving the touch process yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0035] Figure 1 is a schematic top view of the structure of the display panel provided in the first embodiment of the present application;

[0036] Figure 2 yes Figure 1 Schematic diagram of the layered structure of the display panel in the display area;

[0037] Figure 3 yes Figure 1 A cross-sectional view of the first dam along line CC;

[0038] Figure 4a yes Figure 1 A first cross-sectional view of the display panel along line BB is shown;

[0039] Figure 4b yes Figure 1 A second cross-sectional view of the display panel along line BB is shown;

[0040] Figure 5a yes Figure 1 A first cross-sectional view of the first dam along line DD;

[0041] Figure 5b yes Figure 1 A second cross-sectional view of the first dam along line DD;

[0042] Figure 6 is a schematic top view of the structure of a display panel provided in the second embodiment of the present application;

[0043] Figure 7 yes Figure 6 A cross-sectional view of the display panel along line EE is provided;

[0044] Figure 8 yes Figure 6 A cross-sectional view of the display panel along line FF is shown;

[0045] Figure 9 yes Figure 6 A schematic diagram of another position of the first notch of the first dam and the second notch of the second dam in the display panel is provided;

[0046] Figure 10 yes Figure 6 A schematic flow chart of a method for manufacturing a display panel is provided;

[0047] Figure 11 is a schematic top view of the structure of a display panel provided in the third embodiment of the present application;

[0048] Figure 12 is a schematic top view of the structure of a display panel provided in a fourth embodiment of the present application;

[0049] Figure 13 is a schematic top view of the structure of a display panel provided in the fifth embodiment of the present application;

[0050] Figure 14 3 is a schematic diagram of a top view of the display panel provided in the sixth embodiment of the present application. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] The terms "first," "second," and "third" in this application are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications also change accordingly. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0053] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0054] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0055] The inventors of this application discovered that the dam has a certain height, and the touch traces at the edge of the touch layer must cross the dam to electrically connect the peripheral touch chip with the touch electrodes in the display area on the packaging layer. Due to the steepness of the dam, the touch traces at the edge of the touch layer rise and fall as they cross the dam, which can easily cause breakage of the touch traces at the edge of the touch layer or short circuits due to incomplete metal etching at the edge of the dam.

[0056] See also Figures 1 to 5b , Figure 1 is a schematic top view of the display panel provided in the first embodiment of the present application, Figure 2 yes Figure 1 Schematic diagram of the layered structure of the display panel in the display area, Figure 3 yes Figure 1 The cross-sectional view of the first dam along the CC line, Figure 4a yes Figure 1 A first cross-sectional view of the display panel along line BB is shown; Figure 4b yes Figure 1A second cross-sectional view of the display panel along line BB is shown; Figure 5a yes Figure 1 A first cross-sectional view of the first dam along line DD; Figure 5b yes Figure 1 A second cross-sectional view of the first dam along line DD;.

[0057] See also Figures 1 and 2 The present invention provides a display panel 100 including a display area AA and a non-display area NA. The non-display area NA can be located on one side of the display area AA, on two opposite sides of the display area AA, or surrounding the display area AA. The display panel 100 includes a substrate 11, a drive circuit layer 12, a light-emitting element layer 13, a first dam 21, an encapsulation layer 30, a touch layer 40, and a plurality of touch traces 50.

[0058] Specifically: the substrate 11 can be a rigid substrate or a flexible substrate. The rigid substrate can be made of glass, and the flexible substrate can be made of polyimide, polyethersulfone, polycarbonate or polyethylene terephthalate. It can be reasonably set according to needs. The driving circuit layer 12 is arranged on one side of the substrate 11 and is located in the display area AA. The driving circuit layer 12 includes a plurality of pixel circuits. Each pixel circuit includes at least one driving transistor DTFT and a capacitor Cst, which are used to drive the light-emitting element 131 to emit light. The light-emitting element layer 13 is arranged on the side of the driving circuit layer 12 away from the substrate 11 and is located in the display area AA. The light-emitting element layer 13 includes a plurality of light-emitting elements 131, and the plurality of light-emitting elements 131 are electrically connected to the plurality of pixel circuits of the driving circuit layer 12. The light-emitting element 131 can be an organic light-emitting diode (OLED).

[0059] The encapsulation layer 30 at least covers the light-emitting element layer 13 and the first dam 21. The encapsulation layer 30 includes a first inorganic encapsulation layer 31, a second inorganic encapsulation layer 32 and an organic encapsulation layer 33, which are stacked. The organic encapsulation layer 33 is arranged between the first inorganic encapsulation layer 31 and the second inorganic encapsulation layer 32. The first inorganic encapsulation layer 31 and the second inorganic encapsulation layer 32 can both be made of one or a combination of nitrides, oxides, oxynitrides, and carbides. The organic encapsulation layer 33 can be made of one or more of hexamethyldisiloxane, polyacrylates, polycarbonates, and polystyrene, and is used to isolate the driving circuit layer 12, the light-emitting element layer 13, etc. from contact with external water vapor, thereby improving the stress resistance and anti-pollution ability of the display panel 100. The organic encapsulation layer 33 can be formed by inkjet printing.

[0060] The first dam 21 is provided on one side of the substrate 11 and is located in the non-display area NA. To define the encapsulation boundary of the organic encapsulation layer 33, the embodiment of the present application uses the first dam 21 to block the organic encapsulation layer 33, defining the outer edge of the organic encapsulation layer 33 and preventing the organic encapsulation layer 33 from overflowing to the outside of the first dam 21 (away from the display area AA).

[0061] The touch layer 40 is disposed on the side of the encapsulation layer 30 away from the substrate 11 and is located in the display area AA. The touch layer 40 includes multiple touch electrodes 41. In this embodiment, the touch electrodes 41 are metal electrodes, and each touch electrode 41 is staggered relative to each light-emitting element 131 in the light-emitting element layer 13. Multiple touch traces 50 are disposed on the side of the encapsulation layer 30 away from the substrate 11. One end of each touch trace 50 is electrically connected to the touch electrode 41 of the touch layer 40, and the other end extends to the edge of the substrate 11 for electrical connection to the touch chip.

[0062] Specifically, in a specific embodiment of the present application, a first notch 211 is provided on the first dam 21; the touch trace 50 passes through the first notch 211, extending from the side of the first dam 21 close to the display area AA to the side of the first dam 21 away from the display area AA. The touch trace 50 is routed through the first notch 211 without crossing the first dam 21, reducing the possibility of the touch trace 50 breaking or short circuiting due to incomplete metal etching at the edge of the first dam 21, thereby improving the yield of the touch process. In some specific embodiments, the width of the first notch 211 is 1μm to 4μm. Under this width condition, the surface tension of the liquid used to prepare the organic encapsulation layer 33 is used to prevent the inkjet-printed organic encapsulation layer 33 from overflowing. In order to limit the overflow of the inkjet-printed organic encapsulation layer 33 from the first notch 211, the width of the first notch 211 is preferably limited to within 3um. If the width of the first notch 211 is too large, it will be difficult to utilize the surface tension of the liquid used to prepare the organic encapsulation layer 33 to achieve a liquid seal. If the width of the first notch 211 is too small, the touch trace 50 at that location will be too wide, resulting in excessive resistance or difficulty in fabrication. In some specific embodiments, the first notch 211 is disposed perpendicularly or obliquely relative to the extension direction of the first dam 21.

[0063] See also Figure 3 In the embodiment of the present application, the touch line 50 is not provided on the first dam 21 , so there is no need to cross the first dam 21 , which will not cause the touch line 50 to break or the metal etching at the edge of the first dam 21 to be incomplete and cause a short circuit.

[0064] Specifically, in the specific embodiment of the present application, the depth of the first notch 211 is less than or equal to the height of the first dam 21 .

[0065] In some specific embodiments, the depth of the first notch 211 is equal to the height of the first dam 21. Figure 4a The first notch 211 penetrates the first dam 21 in a direction perpendicular to the substrate 11. The substrate 11 has a first exposed portion 111 exposed to the first notch 211. At the first notch 211, the encapsulation layer 30 covers the surface of the first exposed portion 111 away from the substrate 11, and covers the two opposite side surfaces of the first notch 211 (the first side surface 21a and the second side surface 21b). Figure 5a The portion of the encapsulation layer 30 where the first exposed portion 111 is located is a flat structure, and the touch trace 50 is located on the side of the flat structure away from the substrate 11. The touch trace 50 passes through the flat structure and smoothly extends from the side of the first dam 21 closer to the display area AA to the side of the first dam 21 away from the display area AA. It does not need to cross the first dam 21 to form an undulating structure, which will cause the touch trace 50 to break or the metal etching at the edge of the first dam 21 to be incomplete, thus preventing a short circuit.

[0066] In some specific embodiments, the depth of the first notch 211 is less than the height of the first dam 21. Figure 4b At the first notch 211, the encapsulation layer 30 covers the bottom surface of the first notch 211 and covers the two oppositely disposed side surfaces (the first side surface 21a and the second side surface 21b) of the first notch 211. Figure 5b The portion of the encapsulation layer 30 at the first notch 211 is a flat structure, and the touch trace 50 is arranged on the side of the flat structure away from the substrate 11; the touch trace 50 passes through the flat structure and extends smoothly from the side of the first dam 21 close to the display area AA to the side of the first dam 21 away from the display area AA, without crossing the first dam 21. This reduces the steepness of the touch trace 50 passing through the first dam 21, and reduces the possibility of the touch trace 50 breaking or the short circuit caused by incomplete metal etching at the edge of the first dam 21.

[0067] See also Figures 6 to 8 , Figure 6 is a schematic top view of the structure of a display panel provided in the second embodiment of the present application, Figure 7 yes Figure 6 A cross-sectional view of the display panel along line EE is provided. Figure 8 yes Figure 6 The display panel is shown in a cross-sectional view along line FF.

[0068] The display panel 100 provided in this embodiment differs from the display panel 100 provided in the first embodiment in that the display panel 100 provided in this embodiment further includes a second dam 22 disposed on one side of the substrate 11 and on the side of the first dam 21 away from the display area AA. The provision of the second dam 22 further prevents the organic encapsulation layer 33 from overflowing outside the second dam 22. The second dam 22 is provided in correspondence with the first dam 21. For example, if the first dam 21 surrounds the display area AA, the second dam 22 is provided surrounding the first dam 21.

[0069] Furthermore, the second dam 22 provided in this embodiment of the present application is provided with a second notch 221. The touch trace 50 passes through the second notch 221, extending from the side of the first dam 21 closer to the display area AA to the side of the second dam 22 farther from the display area AA. The touch trace 50 is routed through the second notch 221, eliminating the need to cross the second dam 22. This reduces the possibility of breakage of the touch trace 50 or short circuits caused by incomplete metal etching at the edge of the second dam 22, thereby improving the touch process yield. It is understood that in this embodiment, the second dam 22 can also be located on the side of the first dam 21 closer to the display area AA.

[0070] In some specific embodiments, the depth of the second notch 221 is less than or equal to the height of the second dam 22. The depth of the second notch 221 is equal to the height of the second dam 22 (e.g. Figure 8 As shown), that is, the second notch 221 passes through the second dam 22 in a direction perpendicular to the substrate 11, so that the touch line 50 can pass smoothly through the second notch 221. The depth of the second notch 221 is less than the height of the first dam 21 (not shown in the figure), which can also reduce the steepness of the touch line 50 passing through the second dam 22, and reduce the phenomenon of short circuit caused by the breakage of the touch line 50 or incomplete metal etching at the edge of the second dam 22. In some specific embodiments, the width of the second notch 221 is 1μm to 4μm. Under this width condition, the surface tension of the liquid is used to prevent the inkjet-printed organic encapsulation layer 33 from overflowing. In order to limit the overflow of the inkjet-printed organic encapsulation layer 33 from the second notch 221, the width of the second notch 221 is preferably limited to within 3μm. In some specific embodiments, the second notch 221 is vertically or obliquely arranged relative to the extension direction of the second dam 22.

[0071] See also Figure 8The driving circuit layer 12 provided in the embodiment of the present application has a second exposed portion 112 exposed in the second notch 221. At the second notch 221, the encapsulation layer 30 covers the side of the second exposed portion 112 away from the substrate 11, as well as two oppositely disposed side surfaces (the third side surface 22a and the fourth side surface 22b) of the second notch 221. Furthermore, the encapsulation layer 30 disposed on the side of the second exposed portion 112 away from the substrate 11 is a flat structure, and the touch trace 50 is disposed on the side of the flat structure away from the substrate 11. The touch trace 50 passes through the flat structure, extending from the side of the first dam 21 closer to the display area AA to the side of the second dam 22 away from the display area AA. The touch trace 50 does not need to cross the first and second dams 21, 22, thus preventing the touch trace 50 from breaking or causing a short circuit due to incomplete metal etching at the edges of the first and second dams 21, 22.

[0072] In this embodiment, both the first dam 21 and the second dam 22 are disposed on one side of the display area AA, and the extension direction of the first dam 21 is parallel to the extension direction of the second dam 22. In this embodiment, the extension direction of the first dam 21 or the second dam 22 is defined as the first direction X. Furthermore, in this embodiment, the first dam 21 is provided with a plurality of first notches 211 spaced apart along the first direction X, and the second dam 22 is provided with a plurality of second notches 221 spaced apart along the first direction X. The plurality of second notches 221 and the plurality of first notches 211 are provided in a one-to-one correspondence and are located on the same side of the display area AA. Each touch trace 50 sequentially passes through the first notches 211 and the second notches 221, extending from the side of the first dam 21 closer to the display area AA to the side of the second dam 22 farther from the display area AA. Furthermore, in this embodiment, the corresponding second notch 221 and the first notch 211 are aligned in the first direction X. This arrangement facilitates patterning processing and facilitates the touch line 50 to extend from the side of the first dam 21 close to the display area AA to the side of the second dam 22 away from the display area AA, thereby reducing the length of the touch line 50.

[0073] See also Figure 9 , Figure 9 yes Figure 6 A schematic diagram of another position of a first notch in a first dam and a second notch in a second dam in a display panel is provided.

[0074] See also Figure 9 The positional relationship between the first dam 21 and the second dam 22 provided in the embodiment of the present application is similar to Figure 6The difference between the positional relationship of the first dam 21 and the second dam 22 shown is that: in the embodiment of the present application, the corresponding second notch 221 and the first notch 211 are offset in the first direction X. The touch trace 50 first passes through the first notch 211, then extends along the first direction X, and then passes through the second notch 221. It can be understood that the offset arrangement of the corresponding second notch 221 and the first notch 211 in the first direction X allows the second dam 22 to serve as a shield for the first notch 211. Liquid flowing out of the first notch 211 will not leak directly through the second notch 221, further preventing overflow of the inkjet-printed organic encapsulation layer 33.

[0075] See also Figure 10 , Figure 10 yes Figure 6 A schematic flow chart of a method for preparing a display panel is provided.

[0076] See also Figure 10 The method for manufacturing the display panel 100 provided in the embodiment of the present application includes the following steps:

[0077] S1: Provide a substrate 11 and a driving circuit layer 12; form a light-emitting element layer 13 on the side of the driving circuit layer 12 away from the substrate 11, and form a first dam 21 and a second dam 22 on the side of the driving circuit layer 12 away from the substrate 11; and form a plurality of first notches 211 in the first dam 21 and a plurality of second notches 221 in the second dam 22; the depth of the first notches 211 is less than or equal to the height of the first dam 21, and the depth of the second notches 221 is less than or equal to the height of the second dam 22. In this embodiment, the width of the first notches 211 is 2.5 μm, and the width of the second notches 221 is 2.5 μm.

[0078] In this step, the first notches 211 spaced apart along the first direction X of the first dam 21 correspond to the second notches 221 spaced apart along the first direction X of the second dam 22, and are located on the same side of the display area AA. Each touch trace 50 sequentially passes through the first notch 211 and the second notch 221, extending from the side of the first dam 21 closer to the display area AA to the side of the second dam 22 farther from the display area AA. The extension direction of the touch trace 50 is perpendicular to the first direction X. Furthermore, in this embodiment, the corresponding second notches 221 and first notches 211 are aligned in the first direction X.

[0079] S2: A first inorganic encapsulation layer 31 is formed on the side of the first dam 21, the second dam 22, the driving circuit layer 12, and the light-emitting element layer 13 away from the substrate 11. The first inorganic encapsulation layer 31 is an inorganic protective layer made of, for example, SiNx material. The thickness of the first inorganic encapsulation layer is in the range of 0.3 μm to 1 μm.

[0080] S3: forming an organic encapsulation layer 33 on a side of the first inorganic encapsulation layer 31 away from the substrate 11 by inkjet printing, wherein the organic encapsulation layer 33 is disposed on a side of the light-emitting element layer 13 away from the substrate 11;

[0081] S4: A second inorganic encapsulation layer 32 is formed on the side of the organic encapsulation layer 33, the first dam 21, the second dam 22, and the exposed portion of the driving circuit layer 12 away from the substrate 11. The second inorganic encapsulation layer 32 is an inorganic protective layer made of, for example, SiNx material. The thickness of the second inorganic encapsulation layer 32 is in the range of 0.3μm-1μm.

[0082] S5: Touch traces 50 are fabricated on the side of the second inorganic encapsulation layer 32 away from the substrate 11. Touch traces 50 are formed using a photolithography and etching process, connecting the touch electrodes 41 of the touch layer 40 to the touch chip in the edge region. Touch traces 50 are located in the first notch 211 of the first dam 21 and the second notch 221 of the second dam 22.

[0083] See also Figure 11 , Figure 11 3 is a schematic diagram of a top view of the display panel provided in the third embodiment of the present application.

[0084] See also Figure 11 The display panel 100 provided in the embodiment of the present application is Figure 6 The difference between the display panel 100 shown is that: Figure 6 In the illustrated display panel 100, the first notch 211 and the second notch 221 extend in directions perpendicular to the first direction X, and are arranged on a straight line. That is, the first notch 211 and the second notch 221 extend in the same direction. Therefore, the touch trace 50 is a straight line perpendicular to the first direction X. In the display panel 100 provided in this embodiment, the first notch 211 and the second notch 221 are arranged at an angle, that is, their extension directions are not perpendicular to the first direction X. Furthermore, the first notch 211 and the second notch 221 are arranged on a straight line. Therefore, the touch trace 50 is a straight line non-perpendicular to the first direction X. The inclined arrangement of the first notch 211 and the second notch 221 increases their lengths, which facilitates utilizing liquid surface tension to prevent overflow of the inkjet-printed organic encapsulation layer 33.

[0085] See also Figure 12 , Figure 12 3 is a schematic diagram of a top view of the display panel provided in the fourth embodiment of the present application.

[0086] See also Figure 12 The display panel 100 provided in the embodiment of the present application is Figure 11The display panel 100 shown in the figure differs in that the first notch 211 and the second notch 221 in the display panel 100 provided in this embodiment are both arranged at an angle, i.e., their extension directions are not perpendicular to the first direction X. Furthermore, the first notch 211 and the second notch 221 are not arranged in a straight line, i.e., the extension directions of the first notch 211 and the second notch 221 are different. The touch trace 50 is a curved line that is not perpendicular to the first direction X. Because the first notch 211 and the second notch 221 are arranged at an angle and extend in different directions, not only are the lengths of the first notch 211 and the second notch 221 increased, but the surface tension of the liquid is also more effectively used to prevent overflow of the inkjet-printed organic encapsulation layer 33.

[0087] See also Figure 13 and Figure 14 , Figure 13 is a schematic top view of the display panel provided in the fifth embodiment of the present application, Figure 14 3 is a schematic diagram of a top view of the display panel provided in the sixth embodiment of the present application.

[0088] See also Figure 13 The display panel 100 provided in the embodiment of the present application is Figure 1 The difference of the display panel 100 shown is that the first dam 21 provided in this embodiment is arranged around the display area AA, further defining the encapsulation boundary of the organic encapsulation layer 33 .

[0089] See also Figure 14 The display panel 100 provided in the embodiment of the present application is Figure 6 The difference of the display panel 100 shown is that the second dam 22 provided in this embodiment is arranged around the display area AA, and the second dam 22 is arranged on the side of the first dam 21 away from the display area AA, further preventing the organic encapsulation layer 33 from overflowing to the outside of the second dam 22.

[0090] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0091] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0092] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel comprising a display area and a non-display area, characterized in that: The display panel includes: substrate; A driving circuit layer is provided on one side of the substrate; a light-emitting element layer, provided on a side of the driving circuit layer away from the substrate and located in the display area; a first dam, provided on one side of the substrate and located in the non-display area; an encapsulation layer, covering at least the light-emitting element layer and the first dam; A touch layer is provided on a side of the packaging layer away from the substrate and located in the display area; A plurality of touch lines are provided on a side of the packaging layer away from the substrate; one end of the touch line is electrically connected to the touch layer, and the other end is used to be electrically connected to the touch chip; A first gap is provided on the first dam; the touch line passes through the first gap and extends from a side of the first dam close to the display area to a side of the first dam far from the display area.

2. The display panel according to claim 1, wherein: The depth of the first notch is less than or equal to the height of the first dam.

3. The display panel according to claim 1 or 2, wherein: The width of the first notch is 1 μm to 4 μm.

4. The display panel according to claim 3, wherein: The first notch is arranged perpendicularly or obliquely relative to the extension direction of the first dam.

5. The display panel according to claim 2, wherein: The depth of the first notch is equal to the height of the first dam; the driving circuit layer has a first exposed portion exposed to the first notch; at the first notch, the encapsulation layer covers the side of the first exposed portion away from the substrate, and covers two oppositely arranged side surfaces of the first notch.

6. The display panel according to claim 5, wherein: The encapsulation layer arranged on the side of the first exposed portion away from the substrate is a flat structure, and the touch line is arranged on the side of the flat structure away from the substrate; the touch line passes through the flat structure and extends from the side of the first dam close to the display area to the side of the first dam away from the display area.

7. The display panel according to claim 1, wherein: The display panel further includes: a second dam provided on one side of the substrate and located on a side of the first dam away from the display area or on a side of the first dam close to the display area; A second notch is provided on the second dam; the touch line passes through the second notch and extends from a side of the second dam close to the display area to a side of the second dam away from the display area.

8. The display panel according to claim 7, wherein: The depth of the second notch is less than or equal to the height of the second dam.

9. The display panel according to claim 7, wherein: The width of the second notch is 1 μm to 4 μm.

10. The display panel according to claim 7, wherein: The second notch is arranged perpendicularly or obliquely relative to the extension direction of the second dam.

11. The display panel according to claim 7, wherein: The driving circuit layer has a second exposed portion exposed to the second notch. At the second notch, the encapsulation layer covers a side of the second exposed portion away from the substrate and two opposite side surfaces of the second notch.

12. The display panel according to claim 11, wherein: The encapsulation layer arranged on the side of the second exposed portion away from the substrate is a flat structure, and the touch line is arranged on the side of the flat structure away from the substrate; the touch line passes through the flat structure and extends from the side of the second dam close to the display area to the side of the second dam away from the display area.

13. The display panel according to claim 7, wherein: The second notch and the first notch are arranged in a one-to-one correspondence and are located on the same side of the display area. Each touch line passes through the first notch and the second notch in sequence, extending from the side of the first dam close to the display area to the side of the second dam away from the display area.

14. The display panel according to claim 13, wherein: The second notch and the first notch are aligned in the first direction; or The corresponding second notch and the first notch are staggered in the first direction. The touch line first passes through the first notch, then extends along the first direction, and then passes through the second notch.

15. The display panel according to claim 1, wherein The light emitting element layer includes a plurality of organic light emitting diodes; The encapsulation layer includes a first inorganic encapsulation layer, a second inorganic encapsulation layer and an organic encapsulation layer which are stacked, and the organic encapsulation layer is arranged between the first inorganic encapsulation layer and the second inorganic encapsulation layer; The first dam is disposed around the display area.

16. The display panel according to claim 7, wherein: The second dam is disposed around the display area, and the second dam is disposed on a side of the first dam away from the display area.

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