Display panel and display device

Abstract

A display panel and a display device. The display panel has a display area, a first area and a bending area, the first area is located between the display area and the bending area; the display panel comprises a substrate, a first signal line located on one side of the substrate and extending from the bending area to the first area and the display area; a dam located in the first area and on the side of the substrate where the first signal line is located, the orthogonal projection of the dam and the first signal line on the substrate intersects; a first inorganic insulating layer located at least in the first area and on the side of the first signal line away from the substrate; the orthogonal projection of the first inorganic insulating layer and the dam on the substrate at least partially overlaps; the edge of the first signal line comprises a first segment and a second segment, the orthogonal projection of the first segment and the dam on the substrate does not overlap; the orthogonal projection of the second segment and the dam on the substrate overlaps; the orthogonal projection of the first inorganic insulating layer on the substrate covers the orthogonal projection of the first segment and at least part of the second segment on the substrate.

Description

Technical Field

[0001] This disclosure pertains to the field of display technology, specifically relating to a display panel and a display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) displays have attracted widespread attention due to their advantages such as self-illumination, low power consumption, thinness, flexibility, vibrant colors, high contrast, and fast response speed. Summary of the Invention

[0003] In a first aspect, embodiments of this disclosure provide a display panel having a display area, a first area, and a bending area, wherein the first area is located between the display area and the bending area;

[0004] The display panel includes a substrate.

[0005] A first signal line is located on one side of the substrate and extends from the bending area to the first area and the display area;

[0006] A dam is located in the first area and on the side of the base where the first signal line is located, and the orthographic projections of the dam and the first signal line on the base intersect.

[0007] A first inorganic insulating layer is located at least in the first region and on the side of the first signal line away from the substrate;

[0008] The orthographic projections of the first inorganic insulating layer and the dam onto the substrate at least partially overlap;

[0009] The edge of the first signal line includes a first segment and a second segment, wherein the first segment and the orthographic projection of the dam on the base do not overlap; the second segment and the orthographic projection of the dam on the base overlap.

[0010] The orthographic projection of the first inorganic insulating layer on the substrate covers the orthographic projection of the first segment on the substrate and at least a portion of the orthographic projection of the second segment on the substrate.

[0011] In some embodiments, the dam may include multiple dams;

[0012] The first inorganic insulating layer includes a plurality of sub-strips, and the sub-strips and the dam are arranged alternately in sequence along a direction away from the display area;

[0013] The sub-strip includes a first sub-part and a second sub-part, the first sub-part and the second sub-part are arranged along the length direction of the sub-strip, and the first sub-part and the second sub-part are connected;

[0014] The orthographic projections of the edges of the first sub-part and the first signal line on the substrate overlap; the orthographic projections of the edges of the second sub-part and the first signal line on the substrate do not overlap.

[0015] The width of the first sub-part in the direction away from the display area is greater than the width of the second sub-part in the direction away from the display area.

[0016] In some embodiments, the orthographic projections of the first sub-part and part of the second segment onto the substrate do not overlap.

[0017] In some embodiments, the orthographic projection of the first sub-part onto the substrate overlaps the orthographic projection of the portion of the second segment closest to the first segment onto the substrate and the orthographic projection of the first segment onto the substrate.

[0018] In some embodiments, the orthographic projection of the first sub-part onto the substrate covers the orthographic projection of the first segment onto the substrate and the orthographic projection of the second segment onto the substrate.

[0019] In some embodiments, the orthographic projection of the first segment onto the first sub-part and the orthographic projection of the second segment onto the first sub-part are located on the center line of the first sub-part perpendicular to the length direction of the sub-strip.

[0020] In some embodiments, the dam includes a first organic insulating layer located on a side of the first signal line away from and / or close to the substrate;

[0021] The first inorganic insulating layer is located on the side of the first organic insulating layer away from the substrate.

[0022] In some embodiments, the sub-strip further includes a third sub-part, which is arranged along the length of the sub-strip along with the second sub-part and the first sub-part, and the third sub-part is connected to the second sub-part.

[0023] The orthographic projections of the edges of the third sub-part and the first signal line onto the substrate do not overlap.

[0024] The width of the third sub-part in the direction away from the display area is greater than the width of the second sub-part in the direction away from the display area.

[0025] In some embodiments, the orthographic projections of the third sub-section and the dam onto the base intersect.

[0026] In some embodiments, the orthographic projections of the first sub-part, the second sub-part, and the third sub-part onto the substrate cover the orthographic projections of the edges of the first organic insulating layer in the dam, arranged sequentially in a direction away from the display area, onto the substrate.

[0027] In some embodiments, a first gap exists between the orthographic projection of the side edge of the sub-strip arranged in the direction away from the display area onto the substrate and the orthographic projection of the corresponding side edge of the first organic insulating layer in the dam arranged in the direction away from the display area onto the substrate.

[0028] The first spacing is greater than 0.

[0029] In some embodiments, the dam may include multiple dams;

[0030] The orthographic projection of the first inorganic insulating layer on the substrate covers the orthographic projection of the dam on the substrate.

[0031] In some embodiments, a second spacing exists between the orthographic projection of any side edge of the first inorganic insulating layer arranged in the direction away from the display area onto the substrate and the orthographic projection of the corresponding side edge of the first organic insulating layer closest to the corresponding side edge of the first inorganic insulating layer onto the substrate.

[0032] The second spacing is greater than 0.

[0033] In some embodiments, the first signal line includes at least two conductive layers, which are stacked and in contact in a direction away from the substrate;

[0034] In any two adjacent conductive layers, the orthographic projection of the conductive layer farther from the substrate onto the substrate covers the orthographic projection of the conductive layer closer to the substrate onto the substrate, and the conductive layer farther from the substrate covers the edge end face of the conductive layer closer to the substrate.

[0035] In some embodiments, a second inorganic insulating layer is further included, extending from the display area to the first area, the second inorganic insulating layer being located between the first organic insulating layer and the first signal line, and the orthographic projection of the second inorganic insulating layer on the substrate covering the orthographic projection of the first signal line on the substrate.

[0036] In some embodiments, a second inorganic insulating layer is further included, extending from the display area to the first area;

[0037] The first signal line includes at least two conductive layers, which are stacked sequentially in a direction away from the substrate;

[0038] The number of the second inorganic insulating layer is at least one.

[0039] The second inorganic insulating layer also extends between at least one set of adjacent conductive layers;

[0040] The orthographic projection of the second inorganic insulating layer onto the substrate covers the first region.

[0041] In some embodiments, the orthographic projections of the conductive layer located on the side of the second inorganic insulating layer closer to the substrate and the conductive layer located on the side of the second inorganic insulating layer farther from the substrate on the substrate at least partially overlap.

[0042] In some embodiments, the dam further includes a second organic insulating layer located on the side of the first inorganic insulating layer away from the substrate, and the orthographic projection of the second organic insulating layer on the substrate lies within the orthographic projection of the first organic insulating layer on the substrate.

[0043] In some embodiments, a third inorganic insulating layer and a third organic insulating layer are further included, extending from the display area to the first area respectively, and located on the side of the first inorganic insulating layer away from the substrate;

[0044] The third inorganic insulating layer and the third organic insulating layer are stacked sequentially in a direction away from the substrate;

[0045] The orthographic projections of the third inorganic insulating layer and the third organic insulating layer on the substrate cover the orthographic projections of the dam, the first signal line, and the first inorganic insulating layer on the substrate.

[0046] Secondly, embodiments of this disclosure also provide a display device, which includes the aforementioned display panel. Attached Figure Description

[0047] The accompanying drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:

[0048] Figure 1A This is a top view of a partial structure of the display panel in this disclosure.

[0049] Figure 1B This is a schematic diagram of the arrangement of light-emitting devices in the display area of ​​the display panel of this disclosure.

[0050] Figure 1C For along Figure 1B A structural cross-sectional view of the AA section line.

[0051] Figure 1D for Figure 1A Enlarged top view of Part B in the related technology.

[0052] Figure 1E For along Figure 1D A structural cross-sectional view of the CC section line.

[0053] Figure 1F For along Figure 1D A structural cross-sectional view of the DD section line.

[0054] Figure 1G For along Figure 1D A structural cross-sectional view of the EE section line.

[0055] Figure 2A for Figure 1A Part B is an enlarged top view in this embodiment.

[0056] Figure 2B For along Figure 2A A structural cross-sectional view of the FF section line.

[0057] Figure 2C For along Figure 2A A structural cross-sectional view of the GG section line.

[0058] Figure 2D For along Figure 2A A structural cross-sectional view of the HH section line.

[0059] Figure 2E This is a physical image of the first organic insulating layer at the edge of the first inorganic insulating layer in an embodiment of this disclosure.

[0060] Figure 3A for Figure 1A Another enlarged top view of part B in this embodiment.

[0061] Figure 3B For along Figure 3A A structural cross-sectional view of section line II.

[0062] Figure 3C For along Figure 3A A structural cross-sectional view of the JJ section line.

[0063] Figure 3D For along Figure 3A A structural cross-sectional view of the KK section line.

[0064] Figure 3E For along Figure 3A Another structural cross-sectional view of section line II.

[0065] Figure 3F For along Figure 3A Another structural cross-sectional view of the JJ section line.

[0066] Figure 3G For along Figure 3AAnother structural cross-sectional view of the KK section line.

[0067] Figure 4A for Figure 1A Part B is another enlarged top view in this embodiment.

[0068] Figure 4B For along Figure 4A A structural cross-sectional view of the LL section line.

[0069] Figure 4C For along Figure 4A A structural cross-sectional view of the MM section line.

[0070] Figure 4D For along Figure 4A A schematic diagram of the cross-sectional view of the NN section line.

[0071] Figure 4E For along Figure 4A A structural cross-sectional view of the OO section line.

[0072] Figure 5A for Figure 1A Part B is another enlarged top view in this embodiment.

[0073] Figure 5B For along Figure 5A A cross-sectional view of the structure of the PP section.

[0074] Figure 5C For along Figure 5A A structural cross-sectional view of the QQ section line.

[0075] Figure 5D For along Figure 5A A structural cross-sectional view of the RR section line.

[0076] Figure 6A For along Figure 2A Another structural cross-sectional view of the FF section line.

[0077] Figure 6B For along Figure 2A Another structural cross-sectional view of the HH section line.

[0078] Figure 7 For along Figure 2A Another structural cross-sectional view of the FF section line.

[0079] Figure 8A For along Figure 2A Another structural cross-sectional view of the GG section line.

[0080] Figure 8B For along Figure 2AAnother structural cross-sectional view of the HH section line. Detailed Implementation

[0081] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, a display panel and display device provided in the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0082] Embodiments of this disclosure will be described more fully below with reference to the accompanying drawings; however, the embodiments shown may be embodied in different forms and should not be construed as limited to the embodiments set forth in this disclosure. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0083] This disclosure is not limited to the embodiments shown in the accompanying drawings, but includes modifications to the configuration based on the manufacturing process. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown illustrate specific shapes of the areas, but are not intended to be limiting.

[0084] In related technologies, refer to Figure 1A The OLED display panel has a display area 100 and a pad area 103. The pad area 103 is located on the lower edge outside the display area 100. The pad area 103 includes a first area 101 and a bending area 102. The first area 101 is located between the display area 100 and the bending area 102. The bending area 102 can be bent toward the back side of the display area 100.

[0085] Reference Figure 1B and Figure 1C The display area 100 contains an array of sub-pixels (such as OLED light-emitting devices 8). Currently, to improve light emission crosstalk between adjacent light-emitting devices 8 within the display area 100, a power-off isolation trench design is required. A first inorganic insulating layer 4 can be added above the top planarization layer (i.e., the planarization layer closest to the anode 81 of the light-emitting device 8, such as PLN) 9. When the first inorganic insulating layer 4 is etched to form a pattern, it will over-etch the underlying top planarization layer 9, causing a portion of the edge of the pattern corresponding to the first inorganic insulating layer 4 on the top planarization layer 9 to be etched away, forming an undercut (recessed 10) shape. The light-emitting functional layer 82 and cathode 83 in the light-emitting device 8 are disconnected at this undercut position, thereby improving light emission crosstalk between adjacent light-emitting devices 8. (Refer to...) Figure 1D , Figure 1E , Figure 1F and Figure 1G The first inorganic insulating layer 4 is retained below the light-emitting device 8 within the display area 100, but is etched away in the first region 101 and the bending region 102 outside the display area 100. (See reference...) Figure 1CA pixel circuit is also disposed between the substrate 1 and the light-emitting device 8. The pixel circuit includes a driving transistor 12, which is electrically connected to the anode 81 of the light-emitting device 8 through a first conductive connection portion 13 disposed on the SD1 film layer and a second conductive connection portion 14 disposed on the SD2 film layer. An encapsulation layer 15, a touch layer 16, and an organic protective layer 17 are sequentially stacked on the side of the light-emitting device 8 away from the substrate 1. The encapsulation layer 15 includes a first inorganic layer 151, an organic layer 152, and a second inorganic layer 153 sequentially stacked in the direction away from the substrate 1; the touch layer 16 includes a touch conductive layer 161 and an inorganic insulating layer 162 sequentially stacked in the direction away from the substrate 1.

[0086] Reference Figure 1A First signal lines 2 are distributed within the first region 101 and the bending region 102. These first signal lines 2 include signal traces such as VSS / VDD / Vinit. The first signal lines 2 extend from the bending region 102 to the first region 101 and then connect to the display region 100 through the first region 101 to provide corresponding signals to the driving circuit within the display region 100. The first signal lines 2 are located below the top planarization layer 9. Within the bending region 102, the first signal lines 2 are routed using a single conductive layer (such as an SD2 film layer, which is a neutral layer and ensures minimal stress on the signal trace after bending). A dam 3 is also distributed within the first region 101. The dam 3 prevents the organic encapsulation layer encapsulating the light-emitting device 8 from overflowing. The dam 3 is formed by stacking at least one of at least some organic insulating layers (such as a bottom planarization layer, a top planarization layer 9, a pixel defining layer 11, a spacer layer, etc., all of which are distributed within the display region 100). The first signal line 2 needs to pass through the dam 3 within the first zone 101 before it can be connected to the display zone 100.

[0087] Reference Figure 1A , Figure 1D , Figure 1E , Figure 1F and Figure 1GThe first signal line 2 within the first region 101 can be traced using a single conductive layer (such as an SD1 film layer) or multiple stacked conductive layers. For example, in the first zone 101, the first signal line 2 is located below the top planarization layer 9. For a display panel in which a second inorganic insulating layer 5 (such as a passivation layer) is provided between the first signal line 2 and the top planarization layer 9 in the first zone 101, the first signal line 2 in the first zone 101 is routed using a single conductive layer (such as SD1) located below the second inorganic insulating layer 5. The second inorganic insulating layer 5 covers the edge of the first signal line 2 to prevent the edge of the first signal line 2 from being over-etched and forming an undercut shape when etching to form the anode 81 pattern. However, since the organic insulating layer (such as the top planarization layer 9) is removed in the area outside the dam 3 in the first zone 101, the first inorganic insulating layer 4 will be over-etched to form an undercut shape when etching the removed edge of the top planarization layer 9 in the area where the top planarization layer 9 is removed. Moisture can easily enter the display area 100 along the undercut shape position of the top planarization layer 9 at the edge of the first signal line 2, causing black spots to appear in the display area 100 near the first zone 101. For example, in a display panel where no second inorganic insulating layer 5 (such as a passivation layer) is provided between the first signal line 2 and the top planarization layer 9 in the first region 101, the anode 81 of the light-emitting device 8 is prone to over-etching the edge of the first signal line 2 in the first region 101 during etching, forming an undercut morphology. After the anode 81 is prepared, the pixel limiting layer 11 is prepared. The material of the pixel limiting layer 11 is prone to remain in the undercut of the edge of the first signal line 2, which makes it easier for moisture to invade the display area 100, causing black spots to appear in the display area 100 near the first region 101.

[0088] To address the aforementioned problems in the related art, in a first aspect, embodiments of this disclosure provide a display panel, referring to... Figure 1A , Figures 2A-2E , Figures 3A-3G , Figures 4A-4E , Figures 5A-5D , Figures 6A-6B , Figure 7 , Figures 8A-8BThe display panel includes a display area 100, a first area 101, and a bending area 102, with the first area 101 located between the display area 100 and the bending area 102. The display panel includes a substrate 1, a first signal line 2 located on one side of the substrate 1, extending from the bending area 102 to the first area 101 and the display area 100; a dam 3 located in the first area 101 and on the side of the substrate 1 where the first signal line 2 is located, the dam 3 and the first signal line 2 intersecting on the substrate 1 through their orthographic projections; and a first inorganic insulating layer 4 located at least in the first area 100. 01, and located on the side of the first signal line 2 away from the substrate 1; the orthographic projections of the first inorganic insulating layer 4 and the dam 3 on the substrate 1 at least partially overlap; the edge of the first signal line 2 includes a first segment 21 and a second segment 22, the orthographic projections of the first segment 21 and the dam 3 on the substrate 1 do not overlap; the orthographic projections of the second segment 22 and the dam 3 on the substrate 1 overlap; the orthographic projection of the first inorganic insulating layer 4 on the substrate 1 covers the orthographic projection of the first segment 21 on the substrate 1 and at least part of the orthographic projection of the second segment 22 on the substrate 1.

[0089] Both the first area 101 and the bending area 102 are non-display areas, such as the binding side bezel area (i.e., Pad area) 103 outside the display area 100; the bending area 102 can be bent towards the back of the display panel 100. The first signal line 2 includes power signal lines, such as VSS, VDD, and Vinit signal lines. The first signal line 2 is used to provide corresponding power signals to the display driving circuit within the display area 100.

[0090] In this embodiment, the dam 3 surrounds the periphery of the display area 100 and is at least partially located in the first area 101. The dam 3 prevents the organic encapsulation layer encapsulating the light-emitting device from overflowing. The orthographic projection of the extension direction of the dam 3 and the extension direction of the first signal line 2 onto the substrate 1 intersects, such as a perpendicular intersection of the orthographic projection of the extension direction of the dam 3 and the extension direction of the first signal line 2 onto the substrate 1.

[0091] In some embodiments, the dam 3 includes a first organic insulating layer 31 located on the side of the first signal line 2 away from and / or close to the substrate 1; and a first inorganic insulating layer 4 located on the side of the first organic insulating layer 31 away from the substrate 1. The first organic insulating layer 31 can be prepared together with the top planarization layer within the display area 100 via a single exposure process.

[0092] In some embodiments, refer to Figure 1B and Figure 1CA light-emitting device 8 is disposed in the display area 100; a first inorganic insulating layer 4 is also located in the display area 100 and is disposed between the anode 81 of the light-emitting device 8 and the first organic insulating layer 31 (i.e., the top planarization layer 9) below the anode 81. The first inorganic insulating layer 4 is etched apart between adjacent light-emitting devices 8. The etched position will cause over-etching of the first organic insulating layer 31 below, so that a part of the first organic insulating layer 31 corresponding to the edge of the first inorganic insulating layer 4 pattern is etched away. An undercut (concave 10) morphology is formed in the first organic insulating layer 31 at the position corresponding to the edge of the first inorganic insulating layer 4. The light-emitting functional layer 82 and the cathode 83 in the light-emitting device 8 are disconnected at the undercut position, thereby improving the light crosstalk between adjacent light-emitting devices 8.

[0093] In this embodiment, the first signal line 2 and the first inorganic insulating layer 4 are located on the side of the anode of the light-emitting device closer to the substrate 1. The first organic insulating layer 31 is located between the first signal line 2 and the first inorganic insulating layer 4, or the first organic insulating layer 31 is located between the first signal line 2 and the substrate 1. The first organic insulating layer 31 is removed (i.e., no pattern) in the area outside the dam 3 within the first region 101.

[0094] In some embodiments, refer to Figures 2A-2E , Figures 3A-3D , Figures 4A-4E The first organic insulating layer 31 is located between the first signal line 2 and the first inorganic insulating layer 4. The display panel also includes a second inorganic insulating layer 5, which extends from the display area 100 to the first area 101. The second inorganic insulating layer 5 is located between the first organic insulating layer 31 and the first signal line 2, and the orthographic projection of the second inorganic insulating layer 5 on the substrate 1 covers the orthographic projection of the first signal line 2 on the substrate 1. With this configuration, the second inorganic insulating layer 5 can cover the edge of the first signal line 2. When the first inorganic insulating layer 4 is etched in the area where the first organic insulating layer 31 is removed outside the inner dam 3 of the first area 101, and the removed edge of the first organic insulating layer 31 is over-etched to form an undercut (recessed 10) morphology, moisture can be prevented from entering the display area 100 along the undercut morphology of the first organic insulating layer 31 at the edge of the first signal line 2.

[0095] The first organic insulating layer 31 is a top planar layer 9 extending from the display area 100 to the first area 101; the second inorganic insulating layer 5 extends from the display area 100 to the first area 101; the first inorganic insulating layer 4 extends from the display area 100 to the first area 101; and the first signal line 2 is disposed on the same layer as the first conductive connection portion 13 located in the display area 100.

[0096] In this embodiment, by having the orthographic projection of the first inorganic insulating layer 4 on the substrate 1 cover the orthographic projections of the first segment 21 and at least part of the second segment 22 on the substrate 1, compared to the related art where the first inorganic insulating layer 4 is completely etched away in the first region 101, this embodiment retains the first inorganic insulating layer 4 in the area where the first organic insulating layer 31 outside the dam 3 in the first region 101 is removed. On the one hand, for a display panel in the first region 101 where the second inorganic insulating layer 5 is disposed between the first signal line 2 and the first organic insulating layer 31, the first inorganic insulating layer 4 can further cover the first segment 21 and part of the second segment 22 of the first signal line 2, based on the second inorganic insulating layer 5 covering the edge of the first signal line 2, thereby avoiding over-etching of the removed edge of the first organic insulating layer 31 to form an undercut (concave 10) shape when the first inorganic insulating layer 4 is etched in the area where the first organic insulating layer 31 is removed outside the dam 3 in the first region 101, thus preventing moisture from spreading along the edge of the first organic insulating layer 31. The undercut morphology of layer 31 enters the display area 100, ultimately improving or preventing display black spots in the area near the first region 101 within the display area 100. On the other hand, for display panels where no second inorganic insulating layer 5 is provided between the first signal line 2 and the first organic insulating layer 31 within the first region 101, compared to the related art where the first inorganic insulating layer 4 within the first region 101 is completely etched away, in this embodiment, the first inorganic insulating layer 4 covers the first segment 21 and part of the second segment 22 of the first signal line 2. During the anode etching of the light-emitting device, the edge of the first signal line 2 within the first region 101 will not be over-etched to form an undercut morphology. At the same time, when the pixel defining layer is prepared after the anode is prepared, the material of the pixel defining layer is prevented from remaining in the undercut structure at the edge of the first signal line 2, thereby preventing moisture from invading the display area 100 from the undercut position at the edge of the first signal line 2, thus improving or preventing display black spots in the area near the first region 101 within the display area 100.

[0097] In some embodiments, refer to Figures 2A-2E , Figures 3A-3D , Figures 4A-4EThe dam 3 includes multiple sections; the first inorganic insulating layer 4 includes multiple sub-strips 40, and the sub-strips 40 and the dam 3 are arranged alternately in sequence along the direction away from the display area 100; the sub-strip 40 includes a first sub-section 401 and a second sub-section 402, the first sub-section 401 and the second sub-section 402 are arranged along the length direction of the sub-strip 40, and the first sub-section 401 and the second sub-section 402 are connected; the orthographic projections of the first sub-section 401 and the edge of the first signal line 2 on the substrate 1 overlap; the orthographic projections of the second sub-section 402 and the edge of the first signal line 2 on the substrate 1 do not overlap; the width a of the first sub-section 401 along the direction away from the display area 100 is greater than the width b of the second sub-section 402 along the direction away from the display area 100.

[0098] In some embodiments, refer to Figure 2A , Figure 2B , Figure 2C , Figure 2D and Figure 2E The orthographic projections of the first sub-part 401 and part of the second segment 22 on the base 1 do not overlap.

[0099] In some embodiments, refer to Figure 2A , Figure 2B , Figure 2C , Figure 2D and Figure 2E The orthographic projection of the first sub-part 401 on the base 1 covers the orthographic projection of the portion of the second segment 22 near the first segment 21 on the base 1 and the orthographic projection of the first segment 21 on the base 1.

[0100] This configuration serves two purposes. First, for display panels where a second inorganic insulating layer 5 is positioned between the first signal line 2 and the first organic insulating layer 31 within the first zone 101, the second inorganic insulating layer 5 covers the edge of the first signal line 2, while the first inorganic insulating layer 4 further covers the portion of the second segment 22 of the first signal line 2 near the first segment 21 and the first segment 21 itself. This prevents over-etching of the first organic insulating layer 31 at the removed edge during etching, thus avoiding the formation of an undercut (recessed 10) morphology. Furthermore, it prevents moisture from entering the display area 100 along the undercut morphology of the first organic insulating layer 31 at the edge of the first signal line 2, ultimately improving or preventing display black spots in the area near the first zone 101 within the display area 100. Second, for display panels where a second inorganic insulating layer 5 is positioned between the first signal line 2 and the first organic insulating layer 31 within the first zone 101, the second inorganic insulating layer 5 covers the edge of the first signal line 2. For a display panel in which no second inorganic insulating layer 5 is provided between the first signal line 2 and the first organic insulating layer 31 in the first region 101, compared to the related technology where the first inorganic insulating layer 4 in the first region 101 is completely etched away, in this embodiment the first inorganic insulating layer 4 covers the portion of the second segment 22 of the first signal line 2 that is close to the first segment 21 and the first segment 21. When the anode of the light-emitting device is etched, the edge of the first signal line 2 in the first region 101 will not be over-etched to form an undercut morphology. At the same time, when the pixel limiting layer is prepared after the anode is prepared, the material of the pixel limiting layer is prevented from remaining in the undercut structure at the edge of the first signal line 2, thereby preventing moisture from invading the display area 100 from the undercut position at the edge of the first signal line 2, thereby improving or preventing the appearance of display black spots in the area of ​​the display area 100 close to the first region 101.

[0101] In some embodiments, refer to Figure 3A , Figure 3B , Figure 3C and Figure 3D ,as well as Figure 4A , Figure 4B , Figure 4C , Figure 4D and Figure 4E The orthographic projection of the first sub-part 401 on the base 1 covers the orthographic projection of the first segment 21 on the base 1 and the orthographic projection of the second segment 22 on the base 1.

[0102] This configuration serves two purposes. First, for display panels where a second inorganic insulating layer 5 is positioned between the first signal line 2 and the first organic insulating layer 31 within the first zone 101, the first inorganic insulating layer 4 can further cover the first segment 21 and the second segment 22 of the first signal line 2, in addition to the second inorganic insulating layer 5 covering the edge of the first signal line 2. This prevents the first inorganic insulating layer 4 from over-etching the removed edge of the first organic insulating layer 31 in the area outside the dam 3 within the first zone 101, forming an undercut (recessed 10) shape. This, in turn, prevents moisture from entering the display area 100 along the undercut shape of the first organic insulating layer 31 at the edge of the first signal line 2, ultimately improving or preventing display black spots in the area near the first zone 101 within the display area 100. Second, ... For a display panel in which no second inorganic insulating layer 5 is provided between the first signal line 2 and the first organic insulating layer 31 in the first region 101, compared to the related technology where the first inorganic insulating layer 4 in the first region 101 is completely etched away, in this embodiment the first inorganic insulating layer 4 covers the first segment 21 and the second segment 22 of the first signal line 2. When the anode of the light-emitting device is etched, the edge of the first signal line 2 in the first region 101 will not be over-etched to form an undercut morphology. At the same time, when the pixel limiting layer is prepared after the anode is prepared, the material of the pixel limiting layer is avoided from remaining in the undercut structure at the edge of the first signal line 2, thereby preventing moisture from invading the display area 100 from the undercut position at the edge of the first signal line 2, thereby improving or avoiding the appearance of display black spots in the area of ​​the display area 100 near the first region 101.

[0103] In some embodiments, refer to Figure 3E , Figure 3F and Figure 3G Unlike the above embodiments, no second inorganic insulating layer is provided between the first signal line 2 and the first inorganic insulating layer 4, and the first organic insulating layer 31 is located on the side of the first signal line 2 closer to the substrate 1.

[0104] In some embodiments, refer to Figures 2A-2E , Figures 3A-3D , Figures 4A-4E The orthographic projection of the first segment 21 on the substrate 1 and the orthographic projection of the second segment 22 on the first sub-section 401 are located on the center line of the first sub-section 401 perpendicular to the length direction of the sub-strip 40. This arrangement allows the first sub-section 401 of the first inorganic insulating layer 4 to provide good coverage of the edge of the first signal line 2, preventing moisture from entering the display area 100 along the edge of the first signal line 2, thereby improving or preventing display black spots in the area near the first region 101 within the display area 100.

[0105] In some embodiments, refer to Figure 4A, Figure 4B , Figure 4C , Figure 4D and Figure 4E The sub-strip 40 also includes a third sub-section 403, which is arranged along the length of the sub-strip 40 with the second sub-section 402 and the first sub-section 401. The third sub-section 403 is connected to the second sub-section 402. The orthographic projections of the third sub-section 403 and the edge of the first signal line 2 on the substrate 1 do not overlap. The width c of the third sub-section 403 in the direction away from the display area 100 is greater than the width b of the second sub-section 402 in the direction away from the display area 100.

[0106] In some embodiments, refer to Figure 4A , Figure 4B , Figure 4C , Figure 4D and Figure 4E The third sub-part 403 and the dam 3 intersect on the base 1 through their orthogonal projections.

[0107] In some embodiments, refer to Figures 4A-4E The orthographic projections of the first sub-part 401, the second sub-part 402, and the third sub-part 403 on the substrate 1 cover the orthographic projections of the edges of the first organic insulating layer 31 in the dam 3 arranged sequentially in the direction away from the display area 100 on the substrate 1.

[0108] In this embodiment, by covering the edge of the first organic insulating layer 31 in the dam 3 with the first sub-section 401, the second sub-section 402 and the third sub-section 403 of the sub-strip 40, the entire sub-strip 40 can cover the edge of the first organic insulating layer 31 in the dam 3, thereby avoiding the formation of an undercut (concave 10) morphology on the edge of the first organic insulating layer 31 during the etching of the first inorganic insulating layer 4. This prevents moisture from entering the display area 100 from the undercut morphology position of the edge of the first organic insulating layer 31, and ultimately improves or avoids the appearance of display black spots in the area near the first area 101 in the display area 100.

[0109] In some embodiments, there is a first spacing d between the orthographic projection of any side edge of the sub-strip 40 arranged in the direction away from the display area 100 on the substrate 1 and the orthographic projection of the corresponding side edge of the first organic insulating layer 31 in the dam 3 arranged in the direction away from the display area 100 on the substrate 1, and the first spacing d is greater than 0. With this configuration, each sub-strip 40 can completely cover the edge of the first organic insulating layer 31 in the dam 3, thereby avoiding over-etching of the edge of the first organic insulating layer 31 to form an undercut (concave 10) morphology during the etching of the first inorganic insulating layer 4, thereby preventing moisture from entering the display area 100 from the undercut morphology position of the edge of the first organic insulating layer 31, and ultimately improving or avoiding the appearance of display black spots in the area near the first region 101 in the display area 100.

[0110] In some embodiments, refer to Figure 5A , Figure 5B , Figure 5C and Figure 5D The dam 3 includes multiple sections; the orthographic projection of the first inorganic insulating layer 4 on the substrate 1 covers the orthographic projection of the dam 3 on the substrate 1.

[0111] In some embodiments, refer to Figure 5A , Figure 5B , Figure 5C and Figure 5D A second distance e exists between the orthographic projection of any side edge of the first inorganic insulating layer 4 arranged in the direction away from the display area 100 onto the substrate 1 and the orthographic projection of the corresponding side edge of the first organic insulating layer 31 closest to the first inorganic insulating layer 4 onto the substrate 1. The second distance e is greater than 0. This configuration enables the first inorganic insulating layer 4 to completely cover the edge of the first organic insulating layer 31 in the dam 3, thereby preventing the first inorganic insulating layer 4 from over-etching the edge of the first organic insulating layer 31 to form an undercut (concave 10) morphology during etching. This, in turn, prevents moisture from entering the display area 100 from the undercut morphology position of the edge of the first organic insulating layer 31, ultimately improving or preventing display black spots in the area near the first region 101 within the display area 100.

[0112] In some embodiments, refer to Figure 6A and Figure 6B The first signal line 2 includes at least two conductive layers 200, which are stacked and in contact in a direction away from the substrate 1. In any two adjacent conductive layers 200, the orthographic projection of the conductive layer 200 farther from the substrate 1 on the substrate 1 covers the orthographic projection of the conductive layer 200 closer to the substrate 1 on the substrate 1, and the conductive layer 200 farther from the substrate 1 covers the edge end face of the conductive layer 200 closer to the substrate 1.

[0113] Among them, reference Figure 6A and Figure 6B When no insulating layer is provided between the two superimposed conductive layers 200 of the first signal line 2, by making the orthogonal projection of the conductive layer 200 farther from the substrate 1 on the substrate 1 cover the orthogonal projection of the conductive layer 200 closer to the substrate 1 on the substrate 1, and by having the conductive layer 200 farther from the substrate 1 cover the edge end face of the conductive layer 200 closer to the substrate 1, it is possible to avoid over-etching of the conductive layer 200 closer to the substrate 1 when the conductive layer 200 farther from the substrate 1 is etched to form a pattern.

[0114] In some embodiments, refer to Figure 7The display panel also includes a second inorganic insulating layer 5 extending from the display area 100 to the first area 101. The first signal line 2 includes at least two conductive layers 200, which are stacked sequentially in a direction away from the substrate 1. The number of second inorganic insulating layers 5 is at least one, and the second inorganic insulating layer 5 also extends between at least one set of adjacent conductive layers 200. The orthographic projection of the second inorganic insulating layer 5 on the substrate 1 covers the first area 101.

[0115] In some embodiments, refer to Figure 7 The orthographic projections of the conductive layer 200 located on the side of the second inorganic insulating layer 5 near the substrate 1 and the conductive layer 200 located on the side of the second inorganic insulating layer 5 away from the substrate 1 on the substrate 1 at least partially overlap.

[0116] In some embodiments, refer to Figure 7 The conductive layer 200 located on the side of the second inorganic insulating layer 5 near the substrate 1 and the first conductive connection portion 13 located in the display area 100 are disposed in the same layer; the conductive layer 200 located on the side of the second inorganic insulating layer 5 away from the substrate 1 and the second conductive connection portion 14 located in the display area 100 are disposed in the same layer.

[0117] Among them, reference Figure 7 When the conductive layer 200 located on the side of the second inorganic insulating layer 5 away from the substrate 1 is etched to form a pattern, due to the shielding of the second inorganic insulating layer 5, the conductive layer 200 located on the side of the second inorganic insulating layer 5 close to the substrate 1 will not be over-etched. Therefore, the orthographic projections of the conductive layer 200 located on the side of the second inorganic insulating layer 5 close to the substrate 1 and the conductive layer 200 located on the side of the second inorganic insulating layer 5 away from the substrate 1 on the substrate 1 can partially overlap or completely overlap. Alternatively, the orthographic projection of the conductive layer 200 located on the side of the second inorganic insulating layer 5 close to the substrate 1 on the substrate 1 can cover the orthographic projection of the conductive layer 200 located on the side of the second inorganic insulating layer 5 away from the substrate 1 on the substrate 1, or the orthographic projection of the conductive layer 200 located on the side of the second inorganic insulating layer 5 away from the substrate 1 on the substrate 1 can cover the orthographic projection of the conductive layer 200 located on the side of the second inorganic insulating layer 5 close to the substrate 1 on the substrate 1.

[0118] In some embodiments, the first signal line 2 may include a single conductive layer 200. For example, when a second inorganic insulating layer 5 is provided, the first signal line 2 uses a single conductive layer 200 located below the second inorganic insulating layer 5; when no second inorganic insulating layer is provided, the first signal line 2 uses a top conductive layer located below the first inorganic insulating layer 4. The first signal line 2 may also include two conductive layers 200 stacked sequentially. For example, the first signal line 2 uses a top conductive layer 200 and a second top conductive layer 200 located below the first inorganic insulating layer 4. A second inorganic insulating layer 5 may or may not be provided between the two conductive layers 200. The first signal line 2 may also include three conductive layers 200 stacked sequentially. For example, the first signal line 2 uses a top conductive layer 200, a first top conductive layer 200, and a second top conductive layer 200 located below the first inorganic insulating layer 4. A second inorganic insulating layer 5 may or may not be provided between any two adjacent conductive layers 200.

[0119] In some embodiments, each conductive layer 200 of the first signal line 2 can be prepared in a single patterning process with the conductive layer in the same layer of the display area 100.

[0120] In some embodiments, refer to Figure 8A and Figure 8B The dam 3 also includes a second organic insulating layer 32, located on the side of the first inorganic insulating layer 4 away from the substrate 1, and the orthographic projection of the second organic insulating layer 32 on the substrate 1 is located within the orthographic projection of the first organic insulating layer 31 on the substrate 1.

[0121] The second organic insulating layer 32 can be prepared together with the pixel defining layer and / or spacer layer within the display area 100 through a single exposure process. The provision of the second organic insulating layer 32 in the dam 3 enables the dam 3 to better prevent the organic encapsulation layer encapsulating the light-emitting device from overflowing.

[0122] In some embodiments, refer to Figures 2A-2E , Figures 3A-3G , Figures 4A-4E , Figures 5A-5D , Figure 6A and Figure 6B , Figure 7 , Figures 8A-8B The display panel also includes a third inorganic insulating layer 6 and a third organic insulating layer 7, which extend from the display area 100 to the first area 101, respectively, and are located on the side of the first inorganic insulating layer 4 away from the substrate 1; the third inorganic insulating layer 6 and the third organic insulating layer 7 are stacked sequentially in the direction away from the substrate 1; the orthographic projection of the third inorganic insulating layer 6 and the third organic insulating layer 7 on the substrate 1 covers the orthographic projection of the dam 3, the first signal line 2 and the first inorganic insulating layer 4 on the substrate 1.

[0123] The third inorganic insulating layer 6 includes inorganic insulating layers (151, 153) in the encapsulation layer 15 and inorganic insulating layer 162 in the touch layer 16; the inorganic insulating layers (151, 153) in the encapsulation layer 15 and inorganic insulating layer 162 in the touch layer 16 are stacked sequentially in a direction away from the substrate 1. The third organic insulating layer 7 includes an organic protective layer 17 located on the side of the touch layer 16 opposite to the substrate 1.

[0124] The display panel provided in this embodiment, by having the orthographic projection of the first inorganic insulating layer 4 on the substrate 1 cover the orthographic projection of the first segment 21 and at least part of the second segment 22 on the substrate 1, compared to the related art scheme in which the first inorganic insulating layer 4 in the first region 101 is completely etched away, retains the first inorganic insulating layer 4 in the area where the first organic insulating layer 31 outside the dam 3 in the first region 101 is removed. On the one hand, for the display panel in the first region 101 where the second inorganic insulating layer 5 is provided between the first signal line 2 and the first organic insulating layer 31, on the basis of the second inorganic insulating layer 5 covering the edge of the first signal line 2, the first inorganic insulating layer 4 can further cover the first segment 21 and part of the second segment 22 of the first signal line 2, thereby avoiding the over-etching of the removed edge of the first organic insulating layer 31 to form an undercut (concave 10) shape when the first inorganic insulating layer 4 is etched in the area where the first organic insulating layer 31 outside the dam 3 in the first region 101 is removed, thus preventing water vapor from spreading along the first signal line 2. The undercut morphology of the organic insulating layer 31 enters the display area 100, ultimately improving or preventing display black spots in the area near the first region 101 within the display area 100. On the other hand, for display panels where no second inorganic insulating layer 5 is provided between the first signal line 2 and the first organic insulating layer 31 within the first region 101, compared to the related art where the first inorganic insulating layer 4 within the first region 101 is completely etched away, in this embodiment, the first inorganic insulating layer 4 covers the first segment 21 and part of the second segment 22 of the first signal line 2. During the anode etching of the light-emitting device, the edge of the first signal line 2 within the first region 101 will not be over-etched to form an undercut morphology. At the same time, when the pixel defining layer is prepared after the anode is prepared, the material of the pixel defining layer is prevented from remaining in the undercut structure at the edge of the first signal line 2, thereby preventing moisture from invading the display area 100 from the undercut position at the edge of the first signal line 2, thus improving or preventing display black spots in the area near the first region 101 within the display area 100.

[0125] Secondly, embodiments of this disclosure also provide a display device, which includes the display panel in any of the above embodiments.

[0126] By employing the display panel in any of the above embodiments, moisture can be prevented from invading the display area of ​​the display panel from the edge of the first signal line in the display panel, thereby improving or preventing the appearance of display black spots in the area near the first area of ​​the display device and improving the display effect of the display device.

[0127] The display device provided in this disclosure can be any product or component with display function, such as an OLED panel, OLED TV, OLED billboard, monitor, mobile phone, or navigator.

[0128] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A display panel, wherein, It has a display area, a first area, and a bending area, wherein the first area is located between the display area and the bending area; The display panel includes a substrate. A first signal line is located on one side of the substrate and extends from the bending area to the first area and the display area; A dam is located in the first area and on the side of the base where the first signal line is located, and the orthographic projections of the dam and the first signal line on the base intersect. A first inorganic insulating layer is located at least in the first region and on the side of the first signal line away from the substrate; The orthographic projections of the first inorganic insulating layer and the dam onto the substrate at least partially overlap; The edge of the first signal line includes a first segment and a second segment, wherein the first segment and the orthographic projection of the dam onto the base do not overlap; The second segment and the orthographic projection of the cofferdam onto the base overlap; The orthographic projection of the first inorganic insulating layer on the substrate covers the orthographic projection of the first segment on the substrate and at least a portion of the orthographic projection of the second segment on the substrate.

2. The display panel according to claim 1, wherein, The dams include multiple sections; The first inorganic insulating layer includes a plurality of sub-strips, and the sub-strips and the dam are arranged alternately in sequence along a direction away from the display area; The sub-strip includes a first sub-part and a second sub-part, the first sub-part and the second sub-part are arranged along the length direction of the sub-strip, and the first sub-part and the second sub-part are connected; The orthographic projections of the edges of the first sub-part and the first signal line on the substrate overlap; the orthographic projections of the edges of the second sub-part and the first signal line on the substrate do not overlap. The width of the first sub-part in the direction away from the display area is greater than the width of the second sub-part in the direction away from the display area.

3. The display panel according to claim 2, wherein, The orthographic projections of the first sub-part and part of the second segment onto the substrate do not overlap.

4. The display panel according to claim 3, wherein, The orthographic projection of the first sub-part onto the substrate covers the orthographic projection of the portion of the second segment closest to the first segment onto the substrate and the orthographic projection of the first segment onto the substrate.

5. The display panel according to claim 2, wherein, The orthographic projection of the first sub-part onto the substrate covers the orthographic projection of the first segment onto the substrate and the orthographic projection of the second segment onto the substrate.

6. The display panel according to claim 4 or 5, wherein, The orthographic projection of the first segment onto the first sub-part and the orthographic projection of the second segment onto the first sub-part are located on the center line of the first sub-part perpendicular to the length direction of the sub-strip.

7. The display panel according to any one of claims 2-5, wherein, The dam includes a first organic insulating layer located on the side of the first signal line away from and / or close to the substrate; The first inorganic insulating layer is located on the side of the first organic insulating layer away from the substrate.

8. The display panel according to claim 7, wherein, The sub-strip further includes a third sub-part, which is arranged along the length of the sub-strip along with the second sub-part and the first sub-part, and the third sub-part is connected to the second sub-part. The orthographic projections of the edges of the third sub-part and the first signal line onto the substrate do not overlap. The width of the third sub-part in the direction away from the display area is greater than the width of the second sub-part in the direction away from the display area.

9. The display panel according to claim 8, wherein, The third sub-section and the cofferdam intersect on the base.

10. The display panel according to claim 8 or 9, wherein, The orthographic projections of the first sub-part, the second sub-part, and the third sub-part onto the substrate cover the orthographic projections of the edges of the first organic insulating layer in the dam, arranged sequentially in a direction away from the display area, onto the substrate.

11. The display panel according to claim 10, wherein, There is a first gap between the orthographic projection of the side edge of the sub-strip arranged in the direction away from the display area on the substrate and the orthographic projection of the corresponding side edge of the first organic insulating layer in the dam arranged in the direction away from the display area on the substrate. The first spacing is greater than 0.

12. The display panel according to claim 7, wherein, The dams include multiple sections; The orthographic projection of the first inorganic insulating layer on the substrate covers the orthographic projection of the dam on the substrate.

13. The display panel according to claim 12, wherein, There is a second spacing between the orthographic projection of any side edge of the first inorganic insulating layer arranged in the direction away from the display area on the substrate and the orthographic projection of the corresponding side edge of the first organic insulating layer closest to the corresponding side edge of the first inorganic insulating layer on the substrate. The second spacing is greater than 0.

14. The display panel according to claim 1, wherein, The first signal line includes at least two conductive layers, which are stacked and in contact in a direction away from the substrate; In any two adjacent conductive layers, the orthographic projection of the conductive layer farther from the substrate onto the substrate covers the orthographic projection of the conductive layer closer to the substrate onto the substrate, and the conductive layer farther from the substrate covers the edge end face of the conductive layer closer to the substrate.

15. The display panel according to claim 7, wherein, It also includes a second inorganic insulating layer extending from the display area to the first area, the second inorganic insulating layer being located between the first organic insulating layer and the first signal line, and the orthographic projection of the second inorganic insulating layer on the substrate covering the orthographic projection of the first signal line on the substrate.

16. The display panel according to claim 1, wherein, It also includes a second inorganic insulating layer that extends from the display area to the first area; The first signal line includes at least two conductive layers, which are stacked sequentially in a direction away from the substrate; The number of the second inorganic insulating layer is at least one. The second inorganic insulating layer also extends between at least one set of adjacent conductive layers; The orthographic projection of the second inorganic insulating layer onto the substrate covers the first region.

17. The display panel according to claim 16, wherein, The conductive layer located on the side of the second inorganic insulating layer closer to the substrate and the conductive layer located on the side of the second inorganic insulating layer away from the substrate have at least partial orthogonal projections onto the substrate.

18. The display panel according to claim 7, wherein, The dam also includes a second organic insulating layer located on the side of the first inorganic insulating layer away from the substrate, and the orthographic projection of the second organic insulating layer on the substrate lies within the orthographic projection of the first organic insulating layer on the substrate.

19. The display panel according to claim 1, wherein, It also includes a third inorganic insulating layer and a third organic insulating layer, which extend from the display area to the first area, respectively, and are located on the side of the first inorganic insulating layer away from the substrate; The third inorganic insulating layer and the third organic insulating layer are stacked sequentially in a direction away from the substrate; The orthographic projections of the third inorganic insulating layer and the third organic insulating layer on the substrate cover the orthographic projections of the dam, the first signal line, and the first inorganic insulating layer on the substrate.

20. A display device, wherein, Includes the display panel as described in any one of claims 1-19.

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