Display Panel and Display Device

Abstract

The present invention discloses a display panel and a display device. The display panel includes a touch trace (2) electrically connected to a touch electrode and disposed on a side of a retaining wall structure (1) remote from a base substrate (100), the touch trace (2) including a first trace portion (200). At least a portion of the orthogonal projection of the first trace portion (200) on the base substrate (100) overlaps with the orthogonal projection of the first retaining wall portion (10) on the base substrate (100). The first trace portion (200) includes at least one first trace sub-portion (201) having an average width (h) and at least one second trace sub-portion (202) having an average width (H). In the extension direction of the trace portion (200), the minimum distance between the orthogonal projection of the first trace sub-portion (201) on the base substrate (100) and the orthogonal projection of the first retaining wall portion (10) on the base substrate (100) is less than or equal to 15 um, and the first width (h) is smaller than the second width (H), thereby reducing the incidence of short circuits.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor technology, and more particularly to display panels and display devices.

[0002] [Cross-reference to Related Applications] This application claims priority based on a Chinese patent application filed with the Chinese Patent Office on February 27, 2020, with an application number of PCT / CN2020 / 077041 and an invention title of "Display Panel and Display Device", and incorporates the entire disclosure herein.

Background Art

[0003] Active-matrix organic light-emitting diode (AMOLED) has the advantages of thinness, low power consumption, high contrast, high color gamut, and flexible display, and is widely applied in the display industry.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Among AMOLED products, the flexible multi-layer on cell (FMLOC) on the cell has already been a trend design product. Compared with an external touch screen panel (TSP), the cost can be significantly reduced and the integration level is higher. The product is thin and easy to fold.

[0005] However, the touch integrated display device of the prior art tends to short-circuit between adjacent touch wires, resulting in touch failures.

Means for Solving the Problems

[0006] The display panel provided by an embodiment of the present invention includes a base substrate, a retaining wall structure, a touch electrode, and a touch trace. The base substrate includes a display area and a peripheral area surrounding the display area. The retaining wall structure is disposed in the peripheral area on the base substrate, surrounds the display area, and includes a first retaining wall portion disposed on at least one side of the display area. The touch electrode is disposed at least in the display area. The touch trace is electrically connected to the touch electrode and is disposed on the side of the retaining wall structure away from the base substrate. The touch trace includes a first trace portion. A part of the orthographic projection of at least the first trace portion on the base substrate overlaps the orthographic projection of the first retaining wall portion on the base substrate. The first trace portion includes at least one first trace sub-portion with an average width being a first width and at least one second trace sub-portion with an average width being a second width. In the extending direction of the first trace portion, the minimum distance between the orthographic projection of the first trace sub-portion on the base substrate and the orthographic projection of the first retaining wall portion on the base substrate is 15 μ m or less. ri The first width is smaller than the second width.

[0007] In a possible implementation method, the range of the ratio of the minimum distance between the orthographic projection of the first trace sub-portion on the base substrate and the orthographic projection of the first retaining wall portion on the base substrate to the width of the first retaining wall portion is less than 0.5 and not less than 0. In a possible implementation method, the edge of the orthographic projection of the first retaining wall portion on the base substrate overlaps the orthographic projection of the first trace sub-portion on the base substrate.

[0008] In a possible implementation method, the first retaining wall portion includes a flat portion and inclined portions disposed on both sides of the flat portion in a direction along the extending direction of the first trace portion. The orthographic projection of the inclined portion on the base substrate overlaps the orthographic projection of the first trace sub-portion on the base substrate.

[0009] In a possible implementation method, the orthographic projection of the flat portion on the base substrate overlaps with the orthographic projection of the second trace sub-portion on the base substrate.

[0010] In a possible implementation method, the second trace sub-portion includes a first portion disposed on the flat portion and before bi the following inclined portion placed at a second portion, and the average width of the first portion is smaller than the average width of the second portion.

[0011] In a possible implementation method, the average width of the first portion is 0.8 to 0.95 times the average width of the second portion.

[0012] In a possible implementation method, the inclined portion includes a first inclined sub-portion and a second inclined sub-portion. The second inclined sub-portion is located on the side of the first inclined sub-portion facing the flat portion, and the average gradient of the first inclined sub-portion is greater than the average gradient of the second inclined sub-portion.

[0013] In a possible implementation method, the first trace sub-portion and the second trace sub-portion are arranged alternately.

[0014] In a possible implementation method, the width of the first trace sub-portion along the direction perpendicular to the extension direction of the first trace portion is 0.6 to 0.95 times the width of the second trace sub-portion along the direction perpendicular to the extension direction of the first trace portion.

[0015] In a possible implementation method, there is a width that gradually changes on the side of the second trace sub-portion close to the first trace sub-portion. In the direction from the second trace sub-portion to the first trace sub-portion, the width of the second trace sub-portion gradually decreases.

[0016] In a possible implementation method, the dividing line between the first trace sub-portion and the second trace sub-portion is substantially on the same plane as the boundary of the first retaining wall portion.

[0017] In a possible implementation method, the ratio range of the length to the width of the first trace sub - part is about 0.3 to 0.7.

[0018] In a possible implementation method, the ratio range of the length of the first trace sub - part to the width of the first retaining wall part is about 0.05 to 0.3.

[0019] In a possible implementation method, the peripheral region further includes fan - out data signal lines, the fan - out data signal lines are electrically connected to the data lines of the pixel circuits in the display region, the orthographic projection of the fan - out data signal lines on the base substrate overlaps with the orthographic projection of the first retaining wall part on the base substrate, and the orthographic projection of the fan - out data signal lines on the base substrate overlaps with the orthographic projection of the first trace part on the base substrate.

[0020] In a possible implementation method, the extension direction of at least a part of the fan - out data signal lines intersects with the extension directions of the first retaining wall part and the first trace part. In a possible implementation method, the display panel includes a multi - turn retaining wall structure, and the second trace sub - part includes a touch trace disposed between two adjacent retaining wall structures.

[0021] In a possible implementation method, the extension directions of the first retaining wall part and the first trace part are substantially perpendicular.

[0022] The display panel provided by the embodiment of the present invention includes a display region, a multi - turn retaining wall structure, and a touch trace. There are touch electrodes in the display region. The multi - turn retaining wall structure sequentially surrounds the display region, and the retaining wall structure includes the innermost turn of the retaining wall structure closest to the display region and the outermost turn of the retaining wall structure farthest from the display region. Touch trace, the touch electrode is drawn out from the display area through the touch trace spanning the retaining wall structure, the touch trace includes a lead portion connected to the jumper portion and the jumper portion, the jumper portion overlaps in a direction perpendicular to the display area with the retaining wall structure of the inner turn, the retaining wall structure of the outer turn, the area between the retaining wall structure of the inner turn and the retaining wall structure of the outer turn, in a direction perpendicular to the display area, the lead portion does not overlap with the retaining wall structure, the extending directions of the lead portion and the jumper portion are substantially the same, and the average width at the rising position of the jumper portion spanning at least one of the retaining wall structures is smaller than the average width of the lead portion.

[0023] In a possible implementation method, the display panel has a plurality of the retaining wall structures, and the widths at the rising positions of the same jumper portion spanning different retaining wall structures are the same.

[0024] In a possible implementation method, the widths at the rising positions of different jumper portions are the same.

[0025] In a possible implementation method, there is a hollow portion recessed inward from the outer edge of the touch trace at the rising position of each jumper portion.

[0026] In a possible implementation method, there are two opposing hollow portions at one of the rising positions of each jumper portion, and the notches of the two hollow portions are on opposite sides of each other.

[0027] In a possible implementation method, the length of the hollow portion in the extending direction along the touch trace is longer than the length in the extending direction perpendicular to the touch trace.

[0028] In a possible implementation method, the shape of the hollow portion is rectangular, square, semi-circular, semi-elliptical, trapezoidal, or triangular.

[0029] In a possible implementation method, the length of the hollow portion in the extension direction perpendicular to the touch trace is from 1 / 15 to 1 / 5 of the width of the touch trace.

[0030] In a possible implementation method, the length of the hollow portion in the extension direction perpendicular to the touch trace is 1 μm to 3 μm.

[0031] In a possible implementation method, the width of the hollow portion in the extension direction of the touch trace is 5 μm to 15 μm.

[0032] In a possible implementation method, the width of the jumper portion between two adjacent retaining wall structures is smaller than the width of the lead portion.

[0033] In a possible implementation method, the average width of the jumper portion at the rising position spanning the retaining wall structure is basically the same as the average width of the jumper portion between two adjacent retaining wall structures.

[0034] In a possible implementation method, the widths of different jumper portions between two adjacent retaining wall structures are the same.

[0035] In a possible implementation method, the jumper portion includes an overlapping portion that overlaps with the end face of the retaining wall structure away from the base substrate, and the maximum width of the overlapping portion is basically the same as the maximum width of the lead portion.

[0036] In a possible implementation method, each of the touch traces has a concave portion recessed inward from the outer edge of the touch trace at a position between two adjacent turns of the retaining wall structure.

[0037] In a possible implementation method, each of the touch traces has two concave portions at a position between two adjacent turns of the retaining wall structure, and the notches of the two concave portions are on opposite sides of each other.

[0038] In a possible implementation method, the length of the concave portion in the extension direction of the touch trace is longer than the length in the extension direction perpendicular to the touch trace.

[0039] In a possible implementation method, the shape of the concave portion is a rectangle, a semi-circle, a semi-ellipse, a trapezoid or a triangle.

[0040] In a possible implementation method, the shape of the concave portion is a rectangle, and the length of the concave portion in the extension direction perpendicular to the touch trace is from one-tenth to one-fifth of the width of the lead portion.

[0041] In a possible implementation method, between two adjacent turns of the retaining wall structure, the hollow portion and the concave portion have a communication structure.

[0042] In a possible implementation method, the display panel includes a base substrate, a thin film transistor sequentially arranged on the base substrate, a light emitting layer, and a encapsulation layer, and the touch trace is arranged on the side of the encapsulation layer away from the light emitting layer.

[0043] The display device provided by an embodiment of the present invention includes the display panel provided by an embodiment of the present invention.

Brief Description of the Drawings

[0044]

Figure 1

Figure 2A

Figure 2B

Figure 3A

Figure 3B

Figure 3C

Figure 3D

Figure 3E

Figure 3F

Figure 3G

Figure 4

Figure 5

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Figure 7

Figure 8

Figure 9

Figure 10A

Figure 10B

Figure 11

Figure 12

DETAILED DESCRIPTION OF THE INVENTION

[0045] To make the objectives, technical solutions, and advantages of the embodiments according to the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments according to the present invention with reference to the drawings of the embodiments according to the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention.

[0046] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the ordinary meanings understood by those skilled in the art to which the present invention pertains. Terms such as "first" and "second" used in the present invention do not indicate order, quantity, or importance, but are only used to distinguish different components. Terms such as "comprising" or "including" mean that the elements or items before the word cover the elements or items listed after the word and their equivalents without excluding other elements or items. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections and may include electrical connections, whether direct or indirect.

[0047] It should be noted that the sizes and shapes of all graphs in the drawings do not reflect the true scale and are only intended to illustrate the content of the present invention. The same or similar reference numerals represent the same or similar elements, or elements having the same or similar functions from beginning to end.

[0048] Referring to FIGS. 1, 2A, and 2B, FIG. 2A is a schematic enlarged view of the dotted box in FIG. 1, and FIG. 2B is a schematic cross-sectional view of the dotted circle in FIG. 2A. The present invention provides a display panel including the following.

[0049] The base substrate 100 includes a display area AA and a peripheral area BB surrounding the display area AA.

[0050] The retaining wall structure 1 is disposed in the peripheral area BB of the base substrate 100, surrounds the display area AA, and includes a first retaining wall portion 10 disposed on at least one side of the display area AA.

[0051] The touch electrode is disposed at least in the display area AA.

[0052] The touch trace 2 is electrically connected to the touch electrode and is disposed on the side of the retaining wall structure 1 away from the base substrate 10. Specifically, other layers such as an encapsulation layer are disposed between the retaining wall structure 1 and the touch trace 2. The touch trace 2 includes a first trace portion 200. At least a part thereof overlaps with the orthographic projection of the first retaining wall portion 10 on the base substrate 100. The first trace portion 200 includes at least one first trace sub-portion 201 having an average width of the first width h and at least one second trace sub-portion 202 having an average width of the second width H. The first width h is smaller than the second width H. Along the extension direction AB of the first trace portion 200, the minimum distance between the orthographic projection of the first trace sub-portion 201 on the base substrate 100 and the orthographic projection of the first retaining wall portion 10 on the base substrate 100 is 15 μ m or less ru . Here, in FIG. 2A, the orthographic projection of the first trace sub-portion 201 on the base substrate 100 and the orthographic projection of the first retaining wall portion 10 on the base substrate 100 overlap, and in this case, the distance between the two is 0. Specifically, in a possible implementation method, as shown in FIG. 3A, when the orthographic projection of the first trace sub-portion 201 on the base substrate 100 and the orthographic projection of the first retaining wall portion 10 on the base substrate 100 do not overlap, the minimum distance therebetween can be understood as the distance k between the boundary B1 of the first trace sub-portion 201 close to the first retaining wall portion 10 and the boundary B2 of the first retaining wall portion 10 close to the first trace sub-portion 201. The distance k is 15 μm or less. Since the distance k is small, it is considered that the partial width of the first trace portion 200 is reduced. It can be understood that this portion is a vicinity region where the boundary between the first trace portion 200 and the first retaining wall portion 10 intersects. In a possible implementation method, the distance k can be 5 μm or less. Specifically, the first width h and the second width H can be within a value range. For example, the first width h can be about 14 to 16 μm, and the second width H can be 15 to 20 μm.

[0053] In the display panel provided by an embodiment of the present invention, in a touch trace, at least a part overlaps with the orthographic projection of the first retaining wall portion 10 on the base substrate 100. The first trace portion 200 includes at least one first trace sub-portion 201 with an average width of the first width h and at least one second trace sub-portion 202 with an average width of the second width H. The first width h is smaller than the second width H. The first trace sub-portion 201 and the second trace sub-portion 202 are alternately arranged. Along the extension direction AB of the first trace portion 200, the minimum distance between the orthographic projection of the first trace sub-portion 201 on the base substrate 100 and the orthographic projection of the first retaining wall portion 10 on the base substrate 100 is 15 μ m or less ru. That is, when the touch trace 2 enters the display area (AA) from an external circuit (for example, FPC), when passing through the retaining wall structure 1 (Dam), there is a large step. When exposing the metal film layer forming the touch trace 2, photoresist (PR) residue is likely to remain on the retaining wall structure 1. Photoresist residues are generated on the steep gradient of the same film layer metal traces of different signals. After the subsequent removal of the photoresist, metal residues are generated, resulting in a short circuit between the touch traces 2, and further causing touch failures. In this embodiment of the present invention, by setting the touch trace 2 to have a structure with alternately changing widths at positions spanning the retaining wall structure 1, the space between the touch traces can be increased, the occurrence rate of short circuits can be reduced, the yield can be improved, and the problem that the touch integrated display device tends to short-circuit between adjacent touch wires and causes touch failures is improved.

[0054] In a specific implementation form, the first trace sub-portion 201 and the second trace sub-portion 202 are alternately arranged.

[0055] In a possible implementation method, the ratio range of the minimum distance between the orthographic projection of the first trace sub-portion 201 on the base substrate 100 and the orthographic projection of the first retaining wall portion 10 on the base substrate 100 to the width of the first retaining wall portion 10 is less than 0.5 and not less than 0.

[0056] In a specific implementation form, as shown in FIG. 2A, the display panel includes a multi-turn retaining wall structure 1, and the second trace sub-portion 202 includes a touch trace 203 disposed between two adjacent retaining wall structures 1.

[0057] In a specific implementation form, as shown in FIG. 2A, the orthographic projection edge B1 of the first retaining wall portion 10 on the base substrate 100 overlaps with the orthographic projection of the first trace sub-portion 201 on the base substrate 100, that is, the orthographic projection edge B1 of the first retaining wall portion 10 on the base substrate 100 is disposed on the orthographic projection of the first trace sub-portion 201 on the base substrate 100. In an embodiment of the present invention, the orthographic projection edge B1 of the first retaining wall portion 10 on the base substrate 100 overlaps with the orthographic projection of the first trace sub-portion 201 on the base substrate 100, that is, the portion where the width of the touch trace 2 starts to decrease is at the position where it begins to intersect with the first retaining wall portion 10, which improves the ease of photo-resist accumulation on the slope of the first retaining wall portion 10 when the touch trace 2 is patterned. When metal is exposed there, residues are generated, causing a short-circuit fault.

[0058] In a specific implementation form, as shown in FIGS. 2B and 3B, the first retaining wall portion 10 includes a flat portion 101 along the extension direction of the first trace portion 201 (i.e., the extension direction AB of the first trace portion 200) and inclined portions 102 disposed on both sides of the flat portion 101. The orthographic projection of the inclined portion 102 on the base substrate 100 overlaps with the orthographic projection of the first trace sub-portion 201 on the base substrate 100. The orthographic projection of the flat portion 101 on the base substrate 100 overlaps with the orthographic projection of the second trace sub-portion 202 on the base substrate 100. In an embodiment of the present invention, the orthographic projection of the inclined portion 102 on the base substrate 100 overlaps with the orthographic projection of the first trace sub-portion 201 on the base substrate 100, that is, the width of the touch trace 2 at the inclined portion of the first retaining wall portion 10 is reduced to prevent the photo-resist from easily accumulating on the slope, and as a result, residual metal is exposed on the slope, causing a short-circuit fault.

[0059] In a possible implementation method, as shown in FIG. 3C, the second trace sub - part 202 includes a first part 2021 located in the flat part 101 and a second part 2022 located in the inclined part 102. The average width c1 of the first part 2021 is smaller than the average width c2 of the second part 2022. Specifically, the average width c1 of the first part 2021 is 0.8 to 0.95 times the average width c2 of the second part 2022.

[0060] In a specific implementation form, as shown in FIG. 3D, the inclined part 102 includes a first inclined sub - part 1021 and a second inclined sub - part 1022. The second inclined sub - part 1022 is arranged on the side of the first inclined sub - part 1021 facing the flat part 101. The average gradient k1 of the first inclined sub - part 1021 is larger than the average gradient k2 of the second inclined sub - part 1022.

[0061] In a possible implementation method, as shown in FIG. 3E, the side of the second trace sub - part 202 close to the first trace sub - part 201 has a width that changes upward. In the direction from the second trace sub - part 202 to the first trace sub - part 201, the width c3 of the second trace sub - part 202 gradually decreases.

[0062] In a possible implementation method, as shown in FIG. 3F, the dividing line B3 between the first trace sub - part 201 and the second trace sub - part 202 is substantially on the same plane as the boundary B4 of the first retaining wall part 10. Specifically, the range that is substantially on the same plane can be 0 to 1 μm.

[0063] In a specific implementation form, as shown in FIG. 2A, the width h of the first trace sub - part 201 in the extension direction AB perpendicular to the first trace part 200 is 0.6 to 0.95 times the width H of the second trace sub - part 202 in the extension direction AB perpendicular to the first trace part 200.

[0064] In a specific implementation form, as shown in FIG. 2A, the ratio range of the length f to the width h of the first trace sub - part 201 is in the range of about 0.3 to 0.7.

[0065] In a specific implementation form, as shown in FIG. 2A, the ratio range of the length f of the first trace sub - part 201 to the width e of the first retaining wall part 10 is about 0.05 to 0.3.

[0066] In a specific implementation form, as shown in FIG. 3G, the peripheral region BB further includes fan - out data signal lines 5. The fan - out data signal lines 5 are electrically connected to the data lines (not shown in the figure) of the pixel circuits in the display region AA. The orthographic projection of the fan - out data signal lines 5 on the base substrate 100 overlaps with the orthographic projection of the first retaining wall part 10 on the base substrate 100. The orthographic projection of the fan - out data signal lines 5 on the base substrate 100 overlaps with the orthographic projection of the first trace part 200 on the base substrate 100. Specifically, the extension direction of at least a part of the fan - out data signal lines 5 intersects with the extension directions of the first retaining wall part 10 and the first trace part 200. Specifically, the fan - out data signal lines 5 and the touch trace 2 can be arranged on different layers and are insulated from each other.

[0067] In a specific implementation form, the extension directions of the first retaining wall part 10 and the first trace part 200 are substantially perpendicular.

[0068] Referring to FIGS. 1, 2A, and 2B, FIG. 2A is an enlarged schematic view of the dotted - line box in FIG. 1, and FIG. 2B is a cross - sectional schematic view of the dotted - line circle in FIG. 2A. The present invention provides a display panel including the following.

[0069] The display region AA has touch electrodes (not shown in the figure). Specifically, the display panel can further include a peripheral region BB of the display region AA.

[0070] The multi-turn retaining wall structure 1 sequentially surrounds the display area AA. The retaining wall structure 1 includes the inner-turn retaining wall structure 11 closest to the display area AA and the outer-turn retaining wall structure 12 farthest from the display area AA. Specifically, the distance between the retaining wall structure 1 and the display area AA may be understood as the distance between each retaining wall structure 1 and the outer edge of the display area AA in the display surface parallel to the display panel and the extension direction perpendicular to the retaining wall structure 1 (for example, the direction indicated by the arrow XY in FIG. 1). Note that FIG. 1 is only a schematic diagram of a panel display having two turns of the retaining wall structure 1 as an example. In a specific implementation form, in a specific implementation of the present invention, the display panel can also have other numbers of retaining wall structures 1 such as three turns, four turns, and five turns.

[0071] For the touch trace 2 and the touch electrode 1, the touch trace 2 is drawn out from the display area AA through the touch trace 2 straddling the retaining wall structure 1. The touch trace 2 includes a lead portion 210 connected to the jumper 220 and the jumper portion 220. The jumper portion 220 overlaps in the direction perpendicular to the display area AA with the inner-turn retaining wall structure 11, the outer-turn retaining wall structure 12, and the area between the inner-turn retaining wall structure 11 and the outer-turn retaining wall structure 12. The lead portion 210 does not overlap with the retaining wall structure 1 in the direction perpendicular to the display area AA. The extension directions of the lead portion 210 and the jumper portion 220 are substantially the same. The average width h of the jumper portion 220 at the ascending position straddling at least one retaining wall structure 1 is smaller than the average width H of the lead portion 210. The width of the jumper portion 220 and the width of the lead portion 210 can be specifically understood as the width parallel to the display surface and perpendicular to the extension direction of the touch trace 2. Specifically, as shown in FIG. 2B, the ascending position is understood as the area traversed by climbing from the lower part of the retaining wall structure 1 to the upper part of the retaining wall structure 1.

[0072] The display panel provided by an embodiment of the present invention has a display area and a retaining wall structure surrounding the display area. The display area has touch electrodes. The touch electrodes are drawn out from the display area through touch traces spanning the retaining wall structure. Here, the width h of the jumper portion 220 at the rising position spanning the retaining wall structure 1 is smaller than the width H of the lead portion 210. That is, when the touch trace enters the display area (AA) from an external circuit (for example, FPC), there is a large step in the retaining wall structure (Dam), and when the metal film layer forming the touch trace is exposed, photoresist (PR) residues are likely to occur on the steep gradient of the retaining wall structure. Photoresist residues occur on the steep gradients of the same film layer metal traces of different signals, and after subsequent removal of the photoresist, metal residues are generated, causing a short circuit between the touch traces, and further resulting in touch failures. In contrast, in the embodiment of the present invention, the width of the touch trace at the rising position spanning the retaining wall structure is reduced, thereby increasing the space between the touch traces at the rising position, reducing the occurrence rate of short circuits, improving the yield, and improving the modern touch integrated display device that tends to short circuit between adjacent touch wires and causes touch failures.

[0073] In a specific implementation form, the display panel of the embodiment of the present invention can be an FMLOC display panel. That is, after the encapsulation layer for encapsulating the organic light-emitting diodes of the display panel is manufactured, the touch film layer is directly manufactured thereon. Touch and display are integrated on the same panel. Specifically, as shown in FIG. 1, the touch electrodes are drawn out from the retaining wall structure 1 of a frame (for example, the lower frame) on one side of the display panel, and the touch trace 2 outside the retaining wall structure 1 can be drawn out to the flexible circuit board FPC.

[0074] It should be noted that the retaining wall structure according to the embodiment of the present invention can specifically be a retaining wall structure that blocks the flow of the organic encapsulation material in the encapsulation layer during the encapsulation process.

[0075] In a specific implementation form, the display panel has a plurality of retaining wall structures 1, and the widths of the same jumper portions 220 at rising positions spanning different retaining wall structures 1 are the same. That is, as shown in FIG. 4, for example, the display panel has a retaining wall structure 1 with two turns. Each jumper portion 220 must pass through a first rising position A1, a second rising position A2, a third rising position A3, and a fourth rising position A4 when passing through the retaining wall structure 1 with two turns from the display area AA to the outside. There are a width h11 at the first rising position A1, a width h12 at the second rising position A2, a width h13 at the third rising position A3, and a width h14 at the fourth rising position A4, and h11, h12, h13, and h14 are all the same. In an embodiment of the present invention, the widths of the same jumper portions 220 at rising positions spanning different retaining wall structures are the same, which is beneficial for reducing the difficulty of manufacturing touch traces in the embodiment of the present invention.

[0076] In a specific implementation form, the widths of different jumper portions 220 at rising positions are the same. That is, for example, as shown in FIG. 4, the width h21 of the second jumper portion 220 from the left at the rising position and the width h11 of the first jumper portion 220 from the left at the rising position are the same. In an embodiment of the present invention, the widths of different touch traces 2 at rising positions are the same, which is beneficial for reducing the difficulty of manufacturing touch traces in the embodiment of the present invention. Also, the problem that different touch signals are provided to the display panel due to different widths of different touch traces 2 is avoided.

[0077] In a specific implementation form, as shown in FIGS. 2A, 4, and 5, each jumper 220 has a hollow portion 21 that is recessed inward from the outer edge of the touch trace at the raised position (as indicated by the arrow in FIG. 5). Specifically, each jumper portion 220 has two opposing hollow portions 21 at one raised position. The notches of the two hollow portions 21 are on opposite sides of each other. That is, for example, as shown in FIG. 5, the first jumper portion 220 from the left has a first hollow portion 211 and a second hollow portion 212 at one raised position A1, and the notches of the first hollow portion 211 and the second hollow portion 212 face opposite sides of each other.

[0078] In a specific implementation form, as shown in FIG. 6, the length y of the hollow portion 21 along the touch trace extension direction AB is greater than the length x in the extension direction perpendicular to the touch trace 2 (i.e., the direction indicated by the arrow CD). In an embodiment of the present invention, since the y direction is the direction in which the touch trace 2 rises from the retaining wall structure 1, the x direction is the direction in which different touch traces 2 are likely to be short-circuited. Since the touch trace 2 has a long slope at the raised position, the setting of y becomes larger. Since x does not increase and the line width of the touch trace 2 itself is relatively small, if the x direction becomes too large, it will cause tolerance variation.

[0079] In a specific implementation, the shape of the hollow portion 21 is rectangular as shown in FIG. 5 or FIG. 6. The shape of the hollow portion 21 can also be square as shown in FIG. 7. The hollow portion 21 can also be a semi-circle as shown in FIG. 8. The shape of the hollow portion 21 can also be a semi-ellipse as shown in FIG. 9. The shape of the hollow portion 21 can also be trapezoidal as shown in FIG. 10A. As shown in FIG. 10B, the shape of the hollow portion 21 can also be triangular. Of course, it can be understood that the above-mentioned rectangle, square, semi-circle, semi-ellipse, trapezoid, and triangle may be approximate rectangle, approximate square, approximate semi-circle, approximate semi-ellipse, approximate triangle in actual production considering the errors in the production process.

[0080] In a specific implementation, as shown in FIG. 6, the shape of the hollow portion 21 is rectangular, and the length x of the hollow portion 21 along the extension direction AB of the touch trace 2 is from 1 / 15 to 1 / 5 of the width H of the touch trace 2. Specifically, the length x of the hollow portion 21 along the extension direction AB of the touch trace 2 is from 1 / 10 to 1 / 5 of the width H of the touch trace 2. In the embodiment of the present invention, the length x of the hollow portion 21 along the extension direction AB of the touch trace 2 is from 1 / 10 to 1 / 5 of the width H of the touch trace 2, thereby improving the problem that short circuits are likely to occur at the rising position, while avoiding the influence on the signal transmission ability of the touch trace itself when the line width of the touch trace is too narrow.

[0081] In a specific implementation form, as shown in FIG. 6, the length x of the hollow portion 21 along the extension direction AB perpendicular to the touch trace 2 is 1 μm to 3 μm. Specifically, for example, it can be 2.6 μm. The width y of the hollow portion 21 along the extension direction AB of the touch trace 2 is 5 μm to 15 μm, and specifically, for example, it can be 7 μm.

[0082] In a specific implementation, as shown in FIGS. 2A and 4, the touch trace 2 can only reduce the width at the rising position, that is, the width h of the touch trace 2 at the rising position spanning the retaining wall structure 1 is smaller than the width H of the touch trace 2 at other positions, and the other positions can specifically be the width of the touch trace 2 at positions other than the rising position.

[0083] In a specific implementation, as shown in FIG. 11, in addition to reducing the width at the ascending position, the width of the jumper 220 between two adjacent retaining wall structures 1 (the rectangular coil C in FIG. 11) of the touch trace 2 is also reduced. That is, the width p of the jumper portion 220 between two adjacent retaining wall structures 1 is smaller than the width H of the lead portion 210. Since the distance between two adjacent retaining wall structures 1 is small and the distance between two adjacent touch traces 2 is also small, the patterning space is limited. In an embodiment of the present invention, the touch trace 2 reduces the width at the ascending position and the width of the jumper portion 220 between two adjacent retaining wall structures 1, which can further improve the risk problem of short circuit of the touch trace 1 caused by photoresist residues between adjacent retaining wall structures 1.

[0084] In a specific implementation, referring to FIG. 11, the average width h of the jumper portion 220 at the ascending position spanning the retaining wall structure 1 is basically the same as the average width p of the jumper portion 220 between two adjacent retaining wall structures 1. In an embodiment of the present invention, the width h of the jumper portion 220 at the ascending position spanning the retaining wall structure 1 is the same as the width p of the jumper portion 220 between two adjacent retaining wall structures 1, whereby the manufacturing process of the touch trace 1 can be simplified and the manufacturing cost of the display panel can be reduced.

[0085] In a specific embodiment, the widths of different jumper portions 220 between two adjacent retaining wall structures 1 are the same. For example, referring to FIG. 11, the width p of the first jumper portion 220 from the left between two adjacent retaining wall structures 1 is the same as the width p of the second jumper portion 220 from the left between two adjacent retaining walls. In an embodiment of the present invention, the widths of different bridging portions 220 between two adjacent retaining wall structures 1 are the same, whereby the manufacturing process of the touch trace 1 can be simplified and the manufacturing cost of the display panel can be reduced.

[0086] In a specific embodiment, as shown in FIGS. 2B and 11, the jumper portion 220 includes an overlapping portion 230 that overlaps with the end face 10 of the retaining wall structure 1 facing the jumper portion 220. The maximum width Y of the overlapping portion 230 is the same as the maximum width H of the lead portion 210.

[0087] In a specific implementation form, as shown in FIGS. 11 and 12, each touch trace 2 has a concave portion 22 that is recessed inward from the outer edge of the touch trace 2 between the retaining wall structures 1 of two adjacent turns. Specifically, each touch trace 2 has two concave portions 22 between the retaining wall structures 1 of two adjacent turns. The notches of the two concave portions 22 are on opposite sides of each other.

[0088] In a specific implementation, the length b of the concave portion 22 along the extension direction of the touch trace is greater than the length a along the extension direction perpendicular to the touch trace. Because the distance between two adjacent retaining wall structures 1 is large, the length of the concave portion 22 provided along the extension direction of the touch trace is relatively long. Please consider that the length a of the concave portion 22 along the extension direction perpendicular to the touch trace is not too long and the line width of the touch trace 2 itself is relatively small. If a is large, the resistance changes rapidly.

[0089] In a specific implementation form, between the retaining wall structures 1 of two adjacent turns, the hollow portion 21 and the concave portion 22 are in a communicating structure. In an embodiment of the present invention, between the retaining wall structures 1 of two adjacent turns, the concave portion 22 and the hollow portion 21 provided at the ascending position have the same structure, which simplifies the manufacturing process of the touch trace 2 and reduces the manufacturing cost of the display panel.

[0090] In a specific implementation form, the shape of the concave portion 22 can be a rectangle, a semi-circle, a semi-ellipse, a trapezoid, or a triangle.

[0091] In a specific implementation form, the shape of the concave portion 22 is rectangular, and the length a of the concave portion 22 along the extension direction perpendicular to the touch trace 2 is from one-tenth to one-fifth of the width H of the lead portion 210. In the embodiment of the present invention, the length a of the concave portion 22 along the extension direction perpendicular to the touch trace 2 is from one-tenth to one-fifth of the width H of the lead portion 210, which improves the problem that the problem of short-circuit of the touch trace is likely to occur between adjacent retaining wall structures 1, and also avoids the influence on the signal transmission ability of the touch trace itself when the line width of the touch trace is too narrow.

[0092] In a specific implementation form, the length a of the concave portion 22 along the extension direction perpendicular to the touch trace 2 is 1 μm to 3 μm. Specifically, for example, the width b of the concave portion 22 in the extension direction of the touch trace 2 may be 30 μm to 45 μm. Specifically, for example, it may be 37 μm.

[0093] Specifically, as shown in FIG. 11, the width H of the lead portion 210 is 10 μm to 45 μm. Specifically, for example, it is 14 μm to 15 μm. Specifically, for example, it may be 14.6 μm. Specifically, the distance k1 between two adjacent lead portions 210 may be 15 μm to 25 μm. Specifically, for example, it may be 19 μm.

[0094] Specifically, as shown in FIG. 11, the width h of the jumper portion 220 at the rising position is 10 μm to 15 μm, and for example, it may be 12 μm. The width p of the jumper portion 220 between two adjacent retaining wall structures 1 may specifically be 10 μm to 15 μm. Specifically, for example, it may be 12 μm. Specifically, the distance k2 between two adjacent jumper portions 220 at the rising position may be 20 μm to 25 μm. Specifically, for example, it may be 21.6 μm.

[0095] In a specific implementation form, as shown in FIG. 11, the width k3 of the retaining wall structure 1 may be 30 μm to 40 μm. The distance k4 between two adjacent retaining wall structures 1 may be 30 μm to 40 μm.

[0096] During a specific implementation, other layers such as an encapsulation layer can also be used between the retaining wall structure 1 and the touch trace 2. In a specific implementation form, the display panel sequentially includes a base substrate, a thin film transistor disposed on the base substrate, a light emitting layer, and an encapsulation layer in order. Here, the touch trace is disposed on the side of the encapsulation layer away from the light emitting layer. The retaining wall structure 1 can be disposed between the light emitting layer and the encapsulation layer.

[0097] Embodiments of the present invention further provide a display device including a display panel provided by the embodiments of the present invention.

[0098] The beneficial effects of the embodiments of the present invention are as follows.

[0099] The display panel provided by the embodiments of the present invention includes a display area and a retaining wall structure surrounding the display area. The display area includes touch electrodes. The touch electrodes are drawn out from the display area through touch traces spanning the retaining wall structure. Here, the width of the jumper portion at the rising position spanning the retaining wall structure is smaller than the width of the lead portion. That is, when the touch trace enters the display area (AA) from an external circuit (for example, FPC), after passing through the lower retaining wall structure (Dam), there is a large step, and when the metal film layer forming the touch trace is exposed, photoresist (PR) residues are likely to occur on the steep gradient of the retaining wall structure. Photoresist residues occur on the steep gradient of the same film layer metal trace of different signals, and after the subsequent removal of the photoresist, metal residues are generated, causing a short circuit between the touch traces and resulting in a touch failure. The width of the touch trace at the rising position spanning the retaining wall structure is reduced, thereby increasing the space between the touch traces at the rising position, reducing the occurrence rate of short circuits, improving the yield, and in the case of a touch integrated display device, improving the problem of the short circuit tendency and touch failure between adjacent touch wires.

Claims

1. A display panel, wherein the display panel comprises a base substrate, a retaining wall structure, a touch electrode, and a touch trace, the base substrate includes a display area and a peripheral area surrounding the display area, the retaining wall structure is disposed in the peripheral area on the base substrate, surrounds the display area, and includes a first retaining wall portion disposed on at least one side of the display area, the touch electrode is disposed at least in the display area, the touch trace is electrically connected to the touch electrode and is disposed on a side of the retaining wall structure away from the base substrate, the touch trace includes a first trace portion, and a part of the orthographic projection of at least the first trace portion on the base substrate overlaps with the orthographic projection of the first retaining wall portion on the base substrate, the first trace portion includes at least one first trace sub-portion with an average width of a first width and at least one second trace sub-portion with an average width of a second width, and in the extending direction of the first trace portion, the minimum distance between the orthographic projection of the first trace sub-portion on the base substrate and the orthographic projection of the first retaining wall portion on the base substrate is 15 μm or less, and the first width is smaller than the second width, the first retaining wall portion includes a flat portion and inclined portions disposed on both sides of the flat portion in a direction along the extending direction of the first trace portion, and the orthographic projection of the inclined portion on the base substrate overlaps with the orthographic projection of the first trace sub-portion on the base substrate, the inclined portion includes a first inclined sub-portion and a second inclined sub-portion, the second inclined sub-portion is located on a side of the first inclined sub-portion facing the flat portion, and the average gradient of the first inclined sub-portion is greater than the average gradient of the second inclined sub-portion. A display panel characterized by this.

2. The display panel according to claim 1, wherein the range of the ratio of the minimum distance between the orthographic projection of the first trace sub-portion on the base substrate and the orthographic projection of the first retaining wall portion on the base substrate to the width of the first retaining wall portion is less than 0.5 and not less than 0.

3. The display panel according to claim 1, wherein an edge of the orthographic projection of the first retaining wall portion on the base substrate overlaps with the orthographic projection of the first trace sub-portion on the base substrate.

4. The display panel according to claim 1, wherein the orthographic projection of the flat portion on the base substrate overlaps with the orthographic projection of the second trace sub-portion on the base substrate.

5. The second trace sub-portion includes a first portion disposed on the flat portion and a second portion disposed on the inclined portion, and an average width of the first portion is smaller than an average width of the second portion. The display panel according to claim 1.

6. The display panel according to claim 5, wherein the average width of the first portion is 0.8 to 0.95 times the average width of the second portion.

7. The display panel according to claim 1, wherein the first trace sub-portion and the second trace sub-portion are alternately arranged.

8. The display panel according to claim 1, wherein a width of the first trace sub-portion along a direction perpendicular to an extending direction of the first trace portion is 0.6 to 0.95 times a width of the second trace sub-portion along a direction perpendicular to the extending direction of the first trace portion.

9. The display panel according to claim 1, wherein there is a width that gradually changes on a side of the second trace sub-portion close to the first trace sub-portion, and in a direction from the second trace sub-portion to the first trace sub-portion, the width of the second trace sub-portion gradually decreases.

10. The display panel according to claim 1, wherein a dividing line between the first trace sub-portion and the second trace sub-portion is substantially on the same plane as a boundary of the first retaining wall portion.

11. The display panel according to claim 1, wherein a ratio range of a length to a width of the first trace sub-portion is 0.3 to 0.

7.

12. The display panel according to claim 1, wherein a ratio range of a length of the first trace sub-portion to a width of the first retaining wall portion is 0.05 to 0.

3.

13. The peripheral region further includes fan-out data signal lines, the fan-out data signal lines are electrically connected to data lines of pixel circuits in the display region, and an orthographic projection of the fan-out data signal lines on the base substrate overlaps an orthographic projection of the first retaining wall portion on the base substrate, and an orthographic projection of the fan-out data signal lines on the base substrate overlaps an orthographic projection of the first trace portion on the base substrate. The display panel according to claim 1, characterized in that.

14. The display panel according to claim 13, characterized in that an extension direction of at least a part of the fan-out data signal lines intersects an extension direction of the first retaining wall portion and the first trace portion.

15. The display panel includes the multi-turn retaining wall structure, and the second trace sub-portion includes a touch trace disposed between two adjacent retaining wall structures. The display panel according to claim 1, characterized in that.

16. The display panel according to claim 1, characterized in that an extension direction of the first retaining wall portion and the first trace portion is substantially perpendicular.

17. A display device including the display panel according to claim 1.

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