Organic light-emitting display panels

Abstract

The present application discloses an organic light-emitting display panel, comprising a display area and a non-display area. The organic light-emitting display panel further comprises a substrate, an insulating layer, a first organic material layer, a first metal signal line, a retaining wall, a second organic material layer, and an inorganic material layer. Specifically, the insulating layer is disposed on the substrate; the first organic material layer is disposed on the insulating layer; the film layer containing the first metal signal line is disposed on the first organic material layer, the first metal signal line is located in the non-display area, and the edges of the first metal signal line are provided with multiple notches; the retaining wall is disposed on the film layer containing the first metal signal line, and the retaining wall is located in the non-display area; the second organic material layer is disposed on the film layer containing the first metal signal line; and the inorganic material layer is disposed on a surface of the second organic material layer away from the substrate. The advantage of this invention is that it can improve the problem of black spots appearing on the display screen of the organic light-emitting display panel due to failure of the light-emitting device.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to an organic light-emitting display panel. Background Art

[0002] When preparing an OLED (Organic Light-Emitting Diode) display panel, it is necessary to make metal signal lines on the substrate of the OLED display panel. After the metal signal lines are prepared, it is necessary to use processes such as development, photoresist stripping, and anodic etching to prepare other organic material layers and inorganic material layers of the OLED display panel. When using development, photoresist stripping, and anodic etching to prepare other organic material layers and inorganic material layers of the OLED display panel, the side of the metal signal line will be etched to form a channel. At the same time, a portion of the organic material layer of the OLED display panel will overflow into the channel, forming an organic channel on the side of the metal signal line. External water vapor can easily enter the interior of the OLED display panel through the organic channel, causing the light-emitting device of the OLED display panel to fail and causing black spots to appear on the display screen of the OLED display panel. Summary of the Invention

[0003] Embodiments of the present application provide an organic light emitting display panel to improve the problem of black spots appearing on a display screen of the organic light emitting display panel due to failure of a light emitting device.

[0004] An embodiment of the present application provides an organic light-emitting display panel, including a display area and a non-display area, and the organic light-emitting display panel further includes:

[0005] substrate;

[0006] an insulating layer, the insulating layer being disposed on the substrate;

[0007] a first organic material layer, wherein the first organic material layer is disposed on the insulating layer;

[0008] a first metal signal line, wherein the film layer where the first metal signal line is located is provided on the first organic material layer, the first metal signal line is located in the non-display area, and a plurality of notches are provided at the edge of the first metal signal line;

[0009] a retaining wall, the retaining wall being provided on the film layer where the first metal signal line is located, and the retaining wall being located in the non-display area;

[0010] a second organic material layer, the second organic material layer being disposed on the film layer where the first metal signal line is located;

[0011] The inorganic material layer is disposed on a surface of the second organic material layer away from the substrate.

[0012] Furthermore, the first metal signal line includes a first segment, a second segment, and a third segment, the second segment is located between the first segment and the third segment, a distance from the first segment to the edge of the display area is smaller than a distance from the third segment to the edge of the display area, and the notch is located on the second segment;

[0013] In a top view of the organic light-emitting display panel, the retaining wall overlaps with a portion of the first segment, and the retaining wall does not overlap with the second segment, the first organic material layer overlaps with the third segment, and the first organic material layer does not overlap with the second segment, the second organic material layer overlaps with the third segment, and the second organic material layer does not overlap with the second segment.

[0014] Furthermore, the notch includes a first notch portion and a second notch portion, the first notch portion is connected to the second notch portion, and the distance from the first notch portion to the edge of the first metal signal line is smaller than the distance from the second notch portion to the edge of the first metal signal line.

[0015] Furthermore, the first notch portion is in the shape of an elongated strip, and the second notch portion is in the shape of an elongated strip or a circle.

[0016] Furthermore, when the second notch is in a strip shape, in a top view of the organic light emitting display panel, a length direction of the first notch is perpendicular to a length direction of the second notch.

[0017] Furthermore, the length of the first notch is smaller than the length of the second notch.

[0018] Furthermore, the notch further includes a bending portion, the bending portion is located between the first notch portion and the second notch portion, and the edge of the bending portion is arc-shaped.

[0019] Furthermore, the retaining wall includes a first retaining wall and a second retaining wall, the first retaining wall and the second retaining wall are spaced apart, and the distance from the first retaining wall to the gap is greater than the distance from the second retaining wall to the gap.

[0020] Furthermore, the notches are located on the edges of both sides of the first metal signal line, and the notches on the edges of both sides of the first metal signal line are arranged to be aligned or staggered.

[0021] Furthermore, the organic light-emitting display panel also includes a second metal signal line, the film layer where the second metal signal line is located is provided on the insulating layer, and the second metal signal line is located in the non-display area, wherein the first metal signal line and the second metal signal line are connected in parallel.

[0022] Beneficial effects of this application:

[0023] The present application provides an organic light-emitting display panel. By providing multiple notches at the edge of the first metal signal line, the length of the organic channel can be increased to increase the area of ​​the organic channel without organic residue, thereby cutting off the path of water vapor intrusion and preventing external water vapor from entering the interior of the organic light-emitting display panel through the organic channel, causing the light-emitting device of the organic light-emitting display panel to fail, thereby avoiding the problem of black spots appearing on the display screen of the organic light-emitting display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the organic light emitting display panel of the present application;

[0025] Figure 2 is a schematic diagram of water vapor invading from the non-display area to the display area of ​​the organic light-emitting display panel of the present application;

[0026] Figure 3 yes Figure 1 A cross-sectional view of the organic light emitting display panel taken along line CC′ is shown;

[0027] Figure 4 is a schematic diagram of a first structure of a first metal signal line of an organic light emitting display panel of the present application;

[0028] Figure 5 is a schematic diagram of a second structure of the first metal signal line of the organic light emitting display panel of the present application;

[0029] Figure 6 is a schematic diagram of the first metal signal line of the organic light emitting display panel of the present application before being etched;

[0030] Figure 7 This is a schematic diagram of the organic light emitting display panel of the present application after the first metal signal line is etched.

[0031] 100-substrate; 200-insulating layer; 300-first organic material layer; 400-first metal signal line, 410-first segment, 420-second segment, 421-notch, 4211-first notch portion, 4212-second notch portion, 4213-bend portion, 430-third segment, 440-first metal layer, 450-second metal layer, 460-third metal layer; 500-retaining wall, 510-first retaining wall, 520-second retaining wall; 600-second organic material layer; 700-inorganic material layer, 710-first inorganic material layer, 720-second inorganic material layer; 800-second metal signal line; 900-thin film transistor, 910-active layer, 920-gate, 930-source, 940-drain, 950-first via, 960-second via; 1000-third organic material layer. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0033] In addition, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise expressly limited.

[0034] Since the first metal signal line is generally a Ti / Al / Ti stacked structure, after the metal signal line is prepared, when other organic material layers and inorganic material layers of the organic light-emitting display panel are prepared using processes such as development, photoresist stripping and anode etching, the AL side of the metal signal line will be etched, so that the AL side of the metal signal line is hollowed out to form side engraving. In the subsequent process, the side-engraved part of the AL of the metal signal line is blocked by the top layer of Ti, resulting in insufficient exposure of the AL of the metal signal line. Organic residue will form on the side-engraved part of the AL of the metal signal line, and then an organic channel will be formed along the edge of the side-engraved AL of the metal signal line. External water vapor can easily enter the interior of the organic light-emitting display panel through the organic channel, causing the light-emitting device of the organic light-emitting display panel to fail, and causing black spots to appear on the display screen of the organic light-emitting display panel.

[0035] Therefore, the embodiment of the present application provides an organic light emitting display panel, referring to Figure 1-Figure 3 The organic light-emitting display panel includes a display area A and a non-display area B. The organic light-emitting display panel also includes a substrate 100, an insulating layer 200, a first organic material layer 300, a first metal signal line 400, a retaining wall 500, a second organic material layer 600 and an inorganic material layer 700.

[0036] Specifically, the insulating layer 200 is arranged on the substrate 100; the first organic material layer 300 is arranged on the insulating layer 200; the film layer where the first metal signal line 400 is located is arranged on the first organic material layer 300, the first metal signal line 400 is located in the non-display area B, and the edge of the first metal signal line 400 is provided with multiple notches 421; the retaining wall 500 is arranged on the film layer where the first metal signal line 400 is located, and the retaining wall 500 is located in the non-display area B; the second organic material layer 600 is arranged on the film layer where the first metal signal line 400 is located; the inorganic material layer 700, the inorganic material layer 700 is arranged on a surface of the second organic material layer 600 away from the substrate 100.

[0037] By providing multiple notches 421 at the edge of the first metal signal line 400, the length of the organic channel can be increased to increase the area of ​​the organic channel without organic residue, thereby cutting off the path of water vapor intrusion and preventing external water vapor from entering the interior of the organic light-emitting display panel through the organic channel, causing the light-emitting device of the organic light-emitting display panel to fail, thereby avoiding the problem of black spots appearing on the display screen of the organic light-emitting display panel; and because multiple notches 421 are provided, the edges of the notches 421 of the first metal signal line 400 have a greater density, reducing the degree of side engraving at the AL of the first metal signal line 400, thereby reducing the risk of organic residue in the organic channel.

[0038] In this embodiment, the first metal signal line 400 includes a high voltage power line or a low voltage power line.

[0039] In this embodiment, the first metal signal line 400 includes a first metal layer 440 , a second metal layer 450 disposed on the first metal layer 440 , and a third metal layer 460 disposed on the second metal layer 450 .

[0040] In this embodiment, reference Figure 6 and Figure 7 The material of the first metal layer 440 of the first metal signal line 400 includes Ti, the material of the second metal layer 450 of the first metal signal line 400 includes Al, and the material of the third metal layer 460 of the first metal signal line 400 includes Ti.

[0041] Specifically, the first metal signal line 400 includes a Ti / Al / Ti stacked structure.

[0042] In this embodiment, reference Figure 3The first metal signal line 400 includes a first segment 410, a second segment 420, and a third segment 430. The second segment 420 is located between the first segment 410 and the third segment 430. The distance from the first segment 410 to the edge of the display area A is smaller than the distance from the third segment 430 to the edge of the display area A. The notch 421 is located on the second segment 420. In a top view of the organic light-emitting display panel, the retaining wall 500 overlaps with a portion of the first segment 410, and the retaining wall 500 does not overlap with the second segment 420. The first organic material layer 300 overlaps with the third segment 430, and the first organic material layer 300 does not overlap with the second segment 420. The second organic material layer 600 overlaps with the third segment 430, and the second organic material layer 600 does not overlap with the second segment 420. By setting the notch 421 on the second segment 420, the retaining wall 500 overlaps with a portion of the first segment 410, and the retaining wall 500 does not overlap with the second segment 420, the first organic material layer 300 overlaps with the third segment 430, and the first organic material layer 300 does not overlap with the second segment 420, the second organic material layer 600 overlaps with the third segment 430, and the second organic material layer 600 does not overlap with the second segment 420, the length of the organic channel located in the second segment 420 can be increased, so as to increase the area of ​​the organic channel of the second segment 420 without organic residue, thereby cutting off the path of water vapor intrusion, preventing external water vapor from entering the interior of the organic light-emitting display panel through the organic channel, causing the light-emitting device of the organic light-emitting display panel to fail, thereby avoiding the problem of black spots on the display screen of the organic light-emitting display panel.

[0043] In this embodiment, reference Figure 4 and Figure 5 The notch 421 includes a first notch portion 4211 and a second notch portion 4212. The first notch portion 4211 communicates with the second notch portion 4212, and the distance from the first notch portion 4211 to the edge of the first metal signal line 400 is shorter than the distance from the second notch portion 4212 to the edge of the first metal signal line 400. By providing the notch 421 with the first notch portion 4211 and the second notch portion 4212, the first notch portion 4211 communicates with the second notch portion 4212, and the distance from the first notch portion 4211 to the edge of the first metal signal line 400 is shorter than the distance from the second notch portion 4212 to the edge of the first metal signal line 400. Compared to a solution in which the notch 421 is provided in only one direction, the length of the path for water vapor to move within the notch 421 is increased, and the area within the notch 421 free of organic residue is increased, thereby cutting off the path for water vapor intrusion.

[0044] In this embodiment, reference Figure 4 The first notch portion 4211 is in the shape of an elongated strip, and the second notch portion 4212 is in the shape of an elongated strip.

[0045] In this embodiment, reference Figure 5 The first notch portion 4211 is in the shape of an elongated strip, and the second notch portion 4212 is in the shape of a circle.

[0046] In this embodiment, reference Figure 4 When the second notch portion 4212 is in a strip shape, in a top view of the organic light emitting display panel, the length direction of the first notch portion 4211 is perpendicular to the length direction of the second notch portion 4212 .

[0047] In this embodiment, reference Figure 4 , the length of the first notch portion 4211 is smaller than the length of the second notch portion 4212 .

[0048] In this embodiment, reference Figure 4 The notch 421 further includes a bent portion 4213, which is located between the first notch 4211 and the second notch 4212, and has an arc-shaped edge. By providing the notch 421 with a bent portion 4213, which is located between the first notch 4211 and the second notch 4212, and having an arc-shaped edge, the edge of the arc-shaped bent portion 4213 can guide the movement of water vapor after entering the notch 421, ensuring that the water vapor can enter the second notch 4212 more smoothly.

[0049] In this embodiment, the edge of the first notch 4211 away from the second notch 4212 is curved. By setting the edge of the first notch 4211 away from the second notch 4212 to be curved, the curved edge can guide water vapor, thereby ensuring that water can better enter the notch 421 from the entrance of the first notch 4211.

[0050] In this embodiment, the retaining wall 500 includes a first retaining wall 510 and a second retaining wall 520 . The first retaining wall 510 and the second retaining wall 520 are spaced apart from each other, and the distance from the first retaining wall 510 to the notch 421 is greater than the distance from the second retaining wall 520 to the notch 421 .

[0051] In a top view of the organic light emitting display panel, a portion of the first retaining wall 510 overlaps with a portion of the first segment 410 , and a portion of the second retaining wall 520 overlaps with a portion of the first segment 410 .

[0052] In this embodiment, the notches 421 are located at the edges of both sides of the first metal signal line 400 , and the notches 421 at the edges of both sides of the first metal signal line 400 are arranged to face each other.

[0053] In this embodiment, the notches 421 are located at the edges of both sides of the first metal signal line 400 , and the notches 421 located at the edges of both sides of the first metal signal line 400 are staggered.

[0054] In this embodiment, reference Figure 3 The organic light-emitting display panel further includes a second metal signal line 800. The film layer where the second metal signal line 800 is located is provided on the insulating layer 200. The second metal signal line 800 is located in the non-display area B. The first metal signal line 400 and the second metal signal line 800 are connected in parallel. By providing the second metal signal line 800 and connecting the first metal signal line 400 and the second metal signal line 800 in parallel, the impedance can be reduced, thereby improving the stability of signal transmission on the first metal signal line 400.

[0055] In this embodiment, the second metal signal line 800 includes a power line.

[0056] In this embodiment, reference Figure 3 In a top view of the display panel, a portion of the inorganic material layer 700 overlaps with the second segment 420 .

[0057] In this embodiment, reference Figure 3 The inorganic material layer 700 includes a first inorganic material layer 710 and a second inorganic material layer 720. The first inorganic material layer 710 is arranged on a surface of the second organic material layer 600 away from the substrate 100. A portion of the first inorganic material layer 710 covers a portion of the first metal signal line 400, and a portion of the first inorganic material layer 710 covers a portion of the first metal signal line 400 and covers the retaining wall 500. The second inorganic material layer 720 is arranged on a surface of the first inorganic material layer 710 away from the substrate 100.

[0058] In this embodiment, in a top view of the organic light emitting display panel, a portion of the first inorganic material layer 710 overlaps with the second segment 420 , and a portion of the second inorganic material layer 720 overlaps with the second segment 420 .

[0059] In this embodiment, reference Figure 3 The organic light-emitting display panel also includes a thin film transistor 900, which includes an active layer 910, a gate 920, a source electrode 930 and a drain electrode 940. The source electrode 930 is electrically connected to one side of the active layer 910 through a first via hole 950 that penetrates the film layer between the film layer where the source electrode 930 is located and the active layer 910, and the drain electrode 940 is electrically connected to the other side of the active layer 910 through a first via hole 950 that penetrates the film layer between the film layer where the drain electrode 940 is located and the active layer 910; wherein, the second metal signal line 800, the source electrode 930 and the drain electrode 940 are located in the same film layer.

[0060] In this embodiment, a portion of the first organic material layer 300 covers the source electrode 930 and the drain electrode 940 .

[0061] In this embodiment, in a top view of the organic light emitting display panel, a portion of the second organic material layer 600 overlaps with the thin film transistor 900 .

[0062] In this embodiment, the organic light-emitting display panel also includes a third organic material layer 1000, which is arranged between the first inorganic material layer 710 and the second inorganic material layer 720. In the top view of the organic light-emitting device display panel, the third organic material layer 1000 overlaps with the thin film transistor 900; wherein, the first inorganic material layer 710, the third organic material layer 1000 and the second inorganic material layer 720 constitute an encapsulation layer for encapsulating the light-emitting device of the display panel.

[0063] The above describes in detail the specific embodiments of the present application. The above embodiments disclosed in this application are merely preferred embodiments of the present application. Those skilled in the art will appreciate that many variations and improvements can be made without departing from the spirit of the present application. These variations and improvements fall within the scope of protection defined by the claims of this application.

Claims

1. An organic light emitting display panel, characterized in that: The organic light emitting display panel includes a display area and a non-display area, and further includes: substrate; an insulating layer, the insulating layer being disposed on the substrate; a first organic material layer, wherein the first organic material layer is disposed on the insulating layer; a first metal signal line, wherein the film layer where the first metal signal line is located is provided on the first organic material layer, the first metal signal line is located in the non-display area, and a plurality of notches are provided at the edge of the first metal signal line; a retaining wall, the retaining wall being provided on the film layer where the first metal signal line is located, and the retaining wall being located in the non-display area; a second organic material layer, the second organic material layer being disposed on the film layer where the first metal signal line is located; The inorganic material layer is disposed on a surface of the second organic material layer away from the substrate.

2. The organic light emitting display panel according to claim 1, wherein: The first metal signal line includes a first segment, a second segment, and a third segment, the second segment is located between the first segment and the third segment, the distance between the first segment and the edge of the display area is smaller than the distance between the third segment and the edge of the display area, and the notch is located on the second segment; In a top view of the organic light-emitting display panel, the retaining wall overlaps with a portion of the first segment, and the retaining wall does not overlap with the second segment, the first organic material layer overlaps with the third segment, and the first organic material layer does not overlap with the second segment, the second organic material layer overlaps with the third segment, and the second organic material layer does not overlap with the second segment.

3. The organic light emitting display panel according to claim 2, wherein: The notch includes a first notch portion and a second notch portion, the first notch portion is connected to the second notch portion, and a distance from the first notch portion to the edge of the first metal signal line is smaller than a distance from the second notch portion to the edge of the first metal signal line.

4. The organic light emitting display panel according to claim 3, wherein: The first notch portion is in an elongated strip shape, and the second notch portion is in an elongated strip shape or a circular shape.

5. The organic light emitting display panel according to claim 4, wherein: When the second notch is in an elongated strip shape, in a plan view of the organic light emitting display panel, a length direction of the first notch is perpendicular to a length direction of the second notch.

6. The organic light emitting display panel according to claim 5, wherein: The length of the first notch portion is smaller than the length of the second notch portion.

7. The organic light emitting display panel according to claim 3, wherein: The notch further includes a bending portion, which is located between the first notch portion and the second notch portion, and an edge of the bending portion is arc-shaped.

8. The organic light emitting display panel according to claim 2, wherein: The retaining wall includes a first retaining wall and a second retaining wall. The first retaining wall and the second retaining wall are spaced apart from each other, and the distance from the first retaining wall to the gap is greater than the distance from the second retaining wall to the gap.

9. The organic light emitting display panel according to claim 1, wherein: The notches are located on the edges of both sides of the first metal signal line, and the notches on the edges of both sides of the first metal signal line are arranged to be aligned or staggered.

10. The organic light emitting display panel according to claim 1, wherein: The organic light-emitting display panel further includes a second metal signal line. The film layer where the second metal signal line is located is provided on the insulating layer. The second metal signal line is located in the non-display area. The first metal signal line and the second metal signal line are connected in parallel.

Images