Display panel and manufacturing method thereof, and display device

Abstract

A display panel and a display device are provided. The display panel is divided into a display area (P1) and a non-display area (P2) at least partially surrounding the display area (P1). The non-display area (P2) is provided with a fan-out area (P3). The display panel comprises a substrate (10) and a first power supply line provided on the substrate (10). A first portion (20) of the first power supply line is provided in the fan-out area (P3) for transmitting a first power supply signal. The first portion (20) comprises a sheet line (210) near an edge of the display panel and a plurality of strip lines (220) extending from the sheet line (210) toward the display area (P1) and spaced apart from each other. By configuring the first power supply line located in the fan-out area (P3) to include a plurality of strip lines (220), the reflective area of ​​the power supply line is reduced, the degree of reflectiveness of the power supply line can be weakened, and the display effect is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to, but are not limited to, the field of display technology, and in particular to a display panel and a method for manufacturing the same, and a display device. Background Art

[0002] Flexible displays offer numerous advantages, including impact and vibration resistance, light weight, compact size, and portability, making them a key future development trend. A flexible display comprises a display panel and a cover plate. The non-display area of ​​the display panel is provided with power traces for supplying power signals to the display area to enable display. The cover plate is bonded to the display panel, and ink is applied to the edges of the cover plate to cover the non-display area. To prevent ink from entering the display area, bonding tolerances are taken into account when bonding the cover plate to the display panel. This ensures that the power traces in the non-display area are not completely covered by the ink on the cover plate. Summary of the Invention

[0003] The present application provides a display panel, a method for manufacturing the same, and a display device.

[0004] In a first aspect, the display panel includes a display area and a non-display area at least partially surrounding the display area, the non-display area is provided with a fan-out area, the display panel includes a substrate and a first power line arranged on the substrate, the first power line includes a first portion arranged in the fan-out area, and the first portion includes a sheet line close to the edge of the display panel and a first sub-portion extending from the sheet line toward the display area; and the area of ​​the orthographic projection area of ​​the first sub-portion on the substrate per unit area is smaller than the area of ​​the orthographic projection area of ​​the sheet line on the substrate.

[0005] In one embodiment, the display area includes a plurality of pixel units; the first sub-portion includes a plurality of strip lines spaced apart from each other; the display panel also includes a plurality of transfer lines electrically connected between the plurality of strip lines and the plurality of pixel units, and the plurality of transfer lines are arranged in the fan-out area.

[0006] In one embodiment, the plurality of pixel units include a plurality of rows and columns of pixel units; and each of the plurality of transfer lines is electrically connected to the first power signal line of a corresponding column of pixel units in the plurality of columns of pixel units.

[0007] In one embodiment, the first part further includes a bus bar, which is arranged on a side of the multiple strip traces away from the sheet traces, and the multiple strip traces are all connected to the bus bar; and the multiple transfer traces are all electrically connected to the bus bar on a side away from the display area.

[0008] In one embodiment, at least one of the plurality of strip-shaped traces includes a first end portion adjacent to a bus bar, and an orthographic projection of the first end portion on the bus bar gradually increases in area as the first end portion approaches the bus bar.

[0009] In one embodiment, at least one of the plurality of transfer traces includes a second end portion adjacent to the bus bar, and an orthographic projection of the second end portion on the bus bar gradually increases in area as the second end portion approaches the bus bar.

[0010] In one embodiment, a first inclination angle is formed between the first end of the strip trace and the bus bar; a second inclination angle is formed between the transfer trace and the bus bar; and an angular difference between the first inclination angle and the second inclination angle is less than 30°.

[0011] In one embodiment, the distance between any two adjacent strip lines among the plurality of strip lines is the distance between the center lines of the two adjacent strip lines, and the distance difference between at least two adjacent strip lines among the plurality of strip lines is no more than 10 μm.

[0012] In one embodiment, the distance between at least two adjacent strip-shaped wirings is between 0.5 and 2 times the distance between at least two adjacent columns of pixel units in the multiple rows and columns of pixel units.

[0013] In one embodiment, the display area further includes a plurality of data lines, and the fan-out area further includes a plurality of data line lead-out lines; the orthographic projections of the plurality of data lines on the substrate are respectively located between the orthographic projections of the plurality of first power signal lines of the plurality of columns of pixel units on the substrate; the plurality of data lines are respectively connected to the data signal lines through the plurality of data line lead-out lines; and the plurality of data line lead-out lines partially overlap with the orthographic projections of the plurality of strip lines and the sheet lines on the substrate.

[0014] In one embodiment, the substrate is flexible.

[0015] In a second aspect, in the method for preparing the display panel, the display panel is divided into a display area and a non-display area partially surrounding the display area, and the non-display area is provided with a fan-out area. The preparation method includes: forming a first power line for transmitting a first power signal on a substrate, so that a first part of the first power line is provided in the fan-out area, and the first part includes a sheet line close to the edge of the display panel and a plurality of strip lines spaced apart from each other extending from the sheet line toward the display area.

[0016] In one embodiment, the method further comprises forming a plurality of transfer traces electrically connected to the first portion in a fan-out region of the substrate, for electrically connecting to a plurality of pixel units of the display panel.

[0017] In a third aspect, the display device includes: the above-mentioned display panel; a cover plate, which is attached to the display panel, and a light-shielding layer is provided at the edge of the cover plate to cover the non-display area, wherein the first part of the first power line is at least partially not covered by the light-shielding layer.

[0018] In one embodiment, the display device further includes a second power line, which is arranged in a position in the fan-out area away from the display area relative to the first power line; wherein the light shielding layer at least partially covers the second power line. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0020] Figure 1 A top view of a display panel provided in an embodiment of the present application;

[0021] Figure 2 A top view of a display panel provided in an embodiment of the present application;

[0022] Figure 3 A top view of a display panel provided in an embodiment of the present application;

[0023] Figure 4 A side view of a display panel provided in an embodiment of the present application;

[0024] Figure 5 A top view of a first portion of a first power supply line provided in an embodiment of the present application;

[0025] Figures 6A to 6C A top view of a first portion of a first power supply line provided in an embodiment of the present application;

[0026] Figure 7 A top view of a first portion of a first power supply line provided in an embodiment of the present application;

[0027] Figure 8 The embodiment of this application provides Figure 7 A cross-sectional view of the display panel taken along the AA direction;

[0028] Figure 9 A cross-sectional view of a display panel provided in an embodiment of the present application;

[0029] Figure 10A cross-sectional view of a display panel provided in an embodiment of the present application;

[0030] Figure 11 A top view of a first portion of a first power supply line of a display panel and a light absorbing layer formed thereon, provided in an embodiment of the present application;

[0031] Figure 12 A cross-sectional view of a display panel provided in an embodiment of the present application;

[0032] Figure 13 A cross-sectional view of a display panel provided in an embodiment of the present application;

[0033] Figure 14 A flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0034] Figure 15 A schematic diagram of a method for manufacturing a display panel provided in an embodiment of the present application;

[0035] Figure 16 A schematic diagram of a method for manufacturing a display panel provided in an embodiment of the present application;

[0036] Figure 17 A top view of a display panel provided in an embodiment of the present disclosure;

[0037] Figure 18 A top view of a display panel provided in an embodiment of the present disclosure;

[0038] Figure 19A and Figure 19B A cross-sectional view of a display panel provided for an embodiment of the present disclosure; and

[0039] Figure 20 A top view of a display panel provided in the related art. DETAILED DESCRIPTION

[0040] This application describes multiple embodiments, but this description is exemplary rather than restrictive, and it will be apparent to those skilled in the art that more embodiments and implementations may be included within the scope of the embodiments described herein. Although many possible feature combinations are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0041] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps in the specific order described. As will be understood by those skilled in the art, other orders of steps are also possible. Therefore, the specific order of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can readily understand that these orders can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0042] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly; and the objects being described may be in direct contact or indirect contact.

[0043] In related technologies, in order to improve display performance, power traces are usually made of metal. However, since metal is easily reflective, the light reflected by the power traces not covered by ink is visible to the naked eye, thereby affecting the display effect.

[0044] In order to solve the above technical problems, the embodiments of the present application provide a display panel and a manufacturing method thereof, and a display device, which are described in detail as follows:

[0045] Figure 1 A top view of a display panel provided in an embodiment of the present application is shown. Figure 2 A top view of a display panel provided in an embodiment of the present application is shown. Figure 3 A top view of a display panel provided in an embodiment of the present application is shown. Figure 4 This is a cross-sectional view of a display panel provided in an embodiment of the present application. Figures 1 to 4As shown, the display panel in the embodiment of the present application is divided into a display area P1 and a non-display area P2 surrounding the display area P1. A fan-out area P3 is provided in the non-display area P2. The display panel includes: a substrate 10 and a first power supply line provided on the substrate 10. A first portion 20 of the first power supply line is provided in the fan-out area P3 for transmitting a first power supply signal, such as the power supply signal VDD in the display panel. The first power supply line is typically a film layer made of Ti / Al / Ti.

[0046] like Figure 1 The first portion 20 of the first power supply line in the present application includes a sheet line 210 near the edge of the display panel, a plurality of strip lines 220 extending from the sheet line 210 toward the display area P1 and spaced apart from each other, and a bus bar 230 electrically connected to the plurality of strip lines 220. In this embodiment, the sheet line 210, the plurality of strip lines 220, and the bus bar 230 can be integrally formed, that is, they can be prepared from a single piece of metal material through a patterning process. For example, the first portion 20 can be formed by forming a plurality of vias 200 on a single piece of metal material layer through a patterning process. For example Figure 7 shown.

[0047] For example, the formed plurality of vias 200 may be parallel to each other, and thus the formed plurality of strip traces 220 may also be parallel to each other. The distance between each two adjacent strip traces 220 may be equal. Figure 1 As shown, the display panel further includes a plurality of transfer traces 100 disposed in the fan-out region P3 and electrically connected to the bus bar 230 for transmitting the first power supply to the pixel units in the display region P1. For example, when the display region P1 includes multiple columns and rows of pixel units, each transfer trace 100 is electrically connected to a column of pixel units to provide the first power supply to the pixel units in that column.

[0048] In one embodiment, the sheet trace 210 , the plurality of strip traces 220 , the bus bar 230 and the plurality of transfer traces 100 may be integrally formed, ie, may be prepared from a single piece of metal material through a patterning process.

[0049] from Figure 1 In the display panel shown, it can also be seen that the length of the strip line in the corner area 280 in the first part of the first power line of the display panel is shorter than the strip electrode lines in other areas. This is because the corner area will be covered by the frame of the display panel, so no reflection will be generated.

[0050] Like Figure 20 The conventional technology shown in the figure shows that the power lines in the fan-out area P3 of the display panel are different from the power lines of the whole piece. Figure 1A plurality of vias 200 are provided in the first portion 20 of the first power line provided in the fan-out region P3 shown, which can reduce the reflective area of ​​the power line and weaken the reflective degree of the power line, thereby improving the display effect.

[0051] like Figure 2 As shown, in this embodiment, the first portion 20 of the first power supply line includes a sheet line 210 provided at the edge of the display panel and a plurality of strip lines 220 extending from the sheet line 210 toward the display area P1. In this embodiment, the first portion 20 of the first power supply line does not include a bus bar, and the transfer line 100 is directly electrically connected to the strip lines 220. Figure 5 In addition, Figure 5 In the illustrated embodiment, the distance between each two adjacent strip traces 220 is a spacing a, and the length of each strip trace 220 is h. For example, the distance a between each two adjacent strip traces 220 can be 0.5 to 2 pixel pitches (i.e., each pixel pitch is the distance between each two adjacent columns of pixels when multiple pixels are periodically arranged in multiple rows and columns). For example, if the distance between each two columns of pixels is 61.5 μm, then a can also be 61.5 μm, wherein the width of each strip trace can be 22 μm and the distance between the two strip traces can be selected to be 39.5 μm; the length h can be selected based on the process bonding error, for example, the length h of each strip trace can range from 250 to 300 μm, such as 295 μm.

[0052] like Figure 3 As shown, in this embodiment, the first portion 20 of the first power supply line includes a sheet line 210, a plurality of strip electrodes 220 extending from the sheet line 210 toward the display area P1, and a bus bar 230 electrically connected to the plurality of strip electrodes 220. Figure 1 The difference is that the bus bar 230 in this embodiment is not formed integrally with the plurality of strip electrodes 220 and the sheet trace 210. For example, Figure 2 A bus bar 230 is formed on the basis of the first power supply line formed as shown in FIG6 . In this embodiment, the first part may also include Figure 1 Corner region 280 is shown.

[0053] like Figure 4 As shown, the first portion 20 of the first power line is located in the non-display area P2, and the orthographic projection of the first portion 20 of the first power line on the substrate 1 is located in the fan-out area P3, and the first portion 20 of the first power line is connected to the display area P1 through the transfer line 100 included therein.

[0054] like Figure 4As shown, the substrate 10 is bent, and the display panel further includes: a support layer 11 provided on the side of the substrate 10 away from the first power supply line and a light shielding layer (for example, ink 12) for covering the non-display area when the cover plate is attached, as shown in FIG. Figures 1 to 4 As shown, in order to prevent the ink 12 from entering the display area P1, there is a certain gap between the ink 12 and the display area P1, so that the first part 20 of the first power line is not covered by the ink, that is, the transfer line 100 and the first part 20 of the first power line are set in the gap between the ink 12 and the display area P1.

[0055] In an exemplary embodiment, Figure 8 As shown, the display panel may further include: a thin film transistor 30 located in the display area, a pixel defining layer 40 and a light emitting device layer 50, wherein the thin film transistor 30 includes: an active layer 31, a gate electrode 32, and a source-drain electrode 33. The thin film transistor may have a top gate structure or a bottom gate structure. Figure 8 The description is made by taking a thin film transistor with a top gate structure as an example.

[0056] In one embodiment, the display panel may further include a gate insulating layer 34 , an interlayer insulating layer 35 , and an insulating layer 36 , wherein the insulating layer 36 includes a passivation layer and a planarization layer.

[0057] In one embodiment, the light emitting device layer 50 includes: an anode connected to the source and drain electrodes of the thin film transistor, a light emitting material layer disposed on the anode, and a cathode on the light emitting material layer.

[0058] In one embodiment, the display panel may be an organic light emitting diode display panel, or may be a quantum dot light emitting diode display panel.

[0059] In one embodiment, the fan-out region is located on a side of the display panel away from the camera and the earpiece.

[0060] In one embodiment, the substrate 10 may be a flexible substrate, wherein the flexible substrate may be, but is not limited to, one or more of polyethylene terephthalate, polyethylene terephthalate, polyetheretherketone, polystyrene, polycarbonate, polyarylate, polyarylate, polyimide, polyvinyl chloride, polyethylene, and textile fibers.

[0061] The direction perpendicular to the substrate refers to the stacking direction of the first power trace and the substrate.

[0062] In one embodiment, the number of vias 200 provided in the first portion 20 of the first power trace is determined according to actual conditions. The more vias 200 there are, the more strip traces 220 there are, and the smaller the reflective area of ​​the first portion 20 of the first power trace.

[0063] In one embodiment, the first power trace may be made of a metal, such as silver or aluminum, to ensure the conductivity of the first power trace, for example, a film layer made of Ti / Al / Ti.

[0064] The display panel provided in an embodiment of the present application is divided into a display area and a non-display area at least partially surrounding the display area. The non-display area is provided with a fan-out area. The display panel includes: a substrate and a first power trace provided on the substrate; a first portion of the first power trace is provided in the fan-out area for transmitting a first power signal, and the first portion of the first power trace includes a sheet trace near the edge of the display panel and a plurality of spaced-apart strip traces extending from the sheet trace toward the display area. The present application provides a plurality of vias in the first portion of the first power trace located in the non-display area, thereby forming a plurality of spaced-apart strip traces. This reduces the reflective area of ​​the power trace, weakens the degree of reflectivity of the power trace, and thereby improves the display effect.

[0065] Figures 5 to 7 The figure shows that multiple strip-shaped traces are periodically arranged along a predetermined direction. That is, multiple openings spaced apart from each other are formed throughout the metal layer. These openings are also periodically arranged along the predetermined direction. The predetermined direction may, for example, be parallel or substantially parallel to the edge of the display area near the first power trace. The multiple strip-shaped traces and the multiple openings extend, for example, in a direction perpendicular to the predetermined direction. If the display area includes multiple rows and columns of pixel units, the predetermined direction may, for example, be a direction extending along the multiple rows of pixel units.

[0066] In one embodiment, the display panel also includes: a signal line located in the non-display area and arranged on the same layer as the gate electrode of the thin film transistor, the orthographic projection of the signal line on the substrate and the orthographic projection of the first power line on the substrate have an overlapping area, and an interlayer insulating layer is located between the signal line and the first power line, wherein the extension direction of the signal line and the extension direction of the first power line are perpendicular to or cross each other.

[0067] In one embodiment, the shape of the cross section of the via hole 200 perpendicular to the substrate 10 may include: a rectangle, or the shape of the cross section of the via hole 200 perpendicular to the substrate 10 may be a circle, an ellipse, a diamond or other shapes. For example, when the shape of the cross section of the via hole 200 perpendicular to the substrate 10 is a circle or an ellipse, the two ends of the strip trace 220 respectively connected to the sheet trace 210 and the first power signal line 300 are wider than the middle portion thereof, as shown in FIG. Figure 6B When the shape of the cross section of the via 200 perpendicular to the substrate 10 is a diamond, the strip trace 220 formed is inclined at a certain angle relative to the edge of the display area P1, as shown; Figure 6Cshown.

[0068] Figures 1 to 7 A display panel according to an embodiment of the present disclosure is shown, which includes: a substrate and a first power supply line arranged on the substrate; the first part of the first power supply line is arranged in the fan-out area for transmitting a first power supply signal, and the first part of the first power supply line includes a sheet line close to the edge of the display panel and a plurality of strip lines extending from the sheet line toward the display area and spaced apart from each other. The present application forms a plurality of strip lines spaced apart from each other by providing a plurality of vias in the first part of the first power supply line located in the non-display area, thereby reducing the reflective area of ​​the power supply line, weakening the degree of reflectivity of the power supply line, and thus improving the display effect. That is, the first part of the first power supply line of the present disclosure includes a sheet line and a first sub-portion extending from the sheet line toward the display area, and the area of ​​the orthographic projection area of ​​the first sub-portion on the substrate per unit area is smaller than the area of ​​the orthographic projection area of ​​the sheet line on the substrate. Based on this, the reflective area of ​​the power supply line is reduced, weakening the degree of reflectivity of the power supply line, and thus improving the display effect. For example, Figure 5 As shown, the first portion 20 of the first power supply line includes a sheet line 210 and a first sub-portion 260 extending from the sheet line toward the display area. Within a unit area, the orthographic projection area of ​​the first sub-portion 260 on the substrate is smaller than the orthographic projection area of ​​the sheet line on the substrate. For example, Figure 5 The first sub-section 260 shown includes a plurality of strip traces 220 spaced apart from each other, and Figure 6A The illustrated first subsection 260 includes a plurality of strip traces 220 and bus bars 230 , etc., spaced apart from one another.

[0069] Figure 9 A cross-sectional view of a display panel provided in an embodiment of the present disclosure is shown. Figure 10 A cross-sectional view of a display panel provided in an embodiment of the present disclosure is shown. Figure 11 A top view of a display panel provided in an embodiment of the present disclosure, Figure 12 A cross-sectional view of a display panel provided in an embodiment of the present disclosure is shown. Figure 13 A cross-sectional view of a display panel provided in an embodiment of the present disclosure. In these embodiments, the display panel further includes: a light absorbing layer 70 located in the non-display area P2, and an insulating layer 36 located between the light absorbing layer 70 and the first portion 20 of the first power line.

[0070] The first power supply line is provided in the same layer as the source / drain electrode 33 of the thin film transistor; the light absorption layer 70 is provided in the same layer as the pixel definition layer 40 and is used to absorb light reflected by the first portion 20 of the first power supply line.

[0071] In one embodiment of the present disclosure, the thickness of the light absorbing layer 70 may be 1.5 microns to 3 microns, and the material may be a photosensitive resin, which includes photoresist, polyimide, or polytetrafluoroethylene.

[0072] The display panel provided in the embodiments of the present disclosure includes a light-absorbing layer, which can significantly reduce the light reflection from the first power supply line, thereby ensuring the display quality of the display panel. The light reflection of the display panel provided with the light-absorbing layer and the first via hole is higher than that of the display panel provided with only the first via hole.

[0073] In one embodiment, the light absorption layer includes: a plurality of light absorption structures; the plurality of light absorption structures correspond one-to-one to the plurality of via holes 200 .

[0074] In one embodiment of the present disclosure, the cross-sectional shape of the light absorption structure may be the same as or different from the cross-sectional shape of the corresponding via hole. The cross-sectional shape of the light absorption structure may be rectangular, circular, elliptical, or diamond-shaped.

[0075] In an exemplary embodiment, Figure 9 As shown, the orthographic projection of the light absorption structure 71 on the substrate 10 coincides with the orthographic projection of the corresponding via hole 200 on the substrate 10 . Figure 9 The description is made by taking the case where the cross-sectional shape of the light absorption structure is the same as the cross-sectional shape of the corresponding via hole as an example.

[0076] exist Figure 10 In FIG. 1 , the orthographic projection of the light absorption structure 71 on the substrate 10 covers the orthographic projection of the via hole 200 on the substrate 10 . Figure 11 Shown Figure 10 In the top view of the first power line, the length of the long side of the via 200 is greater than the length of the corresponding light absorption structure along the extension direction of the long side of the via, and the length of the short side of the via 200 is less than the length of the corresponding light absorption structure along the extension direction of the short side of the via.

[0077] Figure 12 This is a cross-sectional view of a display panel provided in accordance with an embodiment of the present disclosure. In this embodiment, the orthographic projection of the light absorption structure 71 on the substrate covers the orthographic projection of the corresponding via hole on the substrate.

[0078] Figure 12 The illustrated light absorbing structure 71 includes an integrally formed first light absorbing portion 711 and a second light absorbing portion 712. The first light absorbing portion 711 is located on a side of the second light absorbing portion 712 that is closer to the first power trace 20. The orthographic projection of the first light absorbing portion 711 on the substrate coincides with the orthographic projection of the corresponding first via on the substrate, while the orthographic projection of the second light absorbing portion 712 on the substrate overlaps with the orthographic projection of the corresponding first via on the substrate.

[0079] In an exemplary embodiment, the length of the long side of the via hole is less than the length of the second light absorbing portion of the corresponding light absorbing structure along the extension direction of the long side of the via hole, and the length of the short side of the via hole is greater than the length of the second light absorbing portion of the corresponding light absorbing structure along the extension direction of the short side of the via hole.

[0080] Figure 13 A cross-sectional view of a display panel according to an embodiment of the present disclosure is provided. In this embodiment, the via holes V2 in the light absorption layer 70 correspond one-to-one to the via holes 200 .

[0081] In one embodiment, the orthographic projection of via hole V2 on the substrate coincides with the orthographic projection of corresponding via hole 200. In one embodiment, the orthographic projection of via hole V2 on the substrate coincides with the orthographic projection of corresponding via hole 200 on the substrate.

[0082] In an exemplary embodiment, the length of the long side of via 200 may be greater than the length of the corresponding via V2 along the extension direction of the long side of via 200, and the length of the short side of via 200 may be less than the length of the corresponding via V2 along the extension direction of the short side of via 200.

[0083] An embodiment of the present application further provides a display device, including: a display panel.

[0084] The display panel is the display panel provided in the aforementioned embodiment, and the implementation principle and effect are similar, which will not be described in detail here.

[0085] The display device may further include a cover plate attached to the display panel, wherein ink is provided on an edge of the cover plate to cover the non-display area, and at least a portion of the first power supply line is not covered by the ink.

[0086] In addition, the display panel further includes a second power supply line, which is arranged in the fan-out area P3 at a position away from the display area P1 relative to the first power supply line; the light shielding layer at least partially covers the second power supply line, such as Figure 4 As shown, the second power trace 80 is covered by the ink 20 .

[0087] In the embodiments of the present disclosure, the display device may be a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system, any product or component having a display function. Other essential components of the display device are well understood by those skilled in the art and are not described here in detail, nor should they be construed as limiting the present invention.

[0088] Figure 14 Flowchart of the method for manufacturing a display panel provided in an embodiment of the present application. Figure 14As shown, the embodiment of the present application also provides a method for manufacturing a display panel, which is used to manufacture a display panel, wherein the display panel is divided into a display area and a non-display area surrounding the display area, and the non-display area is provided with a fan-out area. The method for manufacturing a display panel provided in the embodiment of the present application includes the following steps:

[0089] Step S1: providing a substrate.

[0090] In one embodiment, the substrate may be a flexible substrate, wherein the flexible substrate may be, but is not limited to, one or more of polyethylene terephthalate, polyethylene terephthalate, polyetheretherketone, polystyrene, polycarbonate, polyarylate, polyarylate, polyimide, polyvinyl chloride, polyethylene, and textile fibers.

[0091] Step S2: forming a first power supply line in the non-display area on the substrate.

[0092] The orthographic projection of the first power line on the substrate is located in the fan-out area. The first power line is provided with a plurality of strip-shaped vias in a direction perpendicular to the substrate, so that the first power line includes a plurality of strip-shaped lines parallel to each other.

[0093] The display panel is the display panel provided in the aforementioned embodiment, and the implementation principle and effect are similar, which will not be described in detail here.

[0094] In an exemplary embodiment, step S2 includes: forming source and drain electrodes of the thin film transistor located in the display area and a first power supply line located in the non-display area on the substrate using the same process.

[0095] In an exemplary embodiment, after step S2, the method for preparing the display panel further includes step S3: using the same process to form a pixel defining layer located in the display area and a light absorbing layer located in the non-display area on a side of the first power line away from the substrate.

[0096] The following combination Figures 15 to 16 , a technical solution provided by an exemplary embodiment is described based on the preparation process of the display panel.

[0097] Step 100: Provide a substrate 10, and sequentially form an active layer 31, a gate insulating layer 34, a gate electrode 32, and an interlayer insulating layer 35 of a thin film transistor on the substrate 10. Figure 15 shown.

[0098] Step 200: forming the source and drain electrodes 33 of the thin film transistor located in the display area P1 and the first portion 20 of the first power supply line located in the non-display area P2 on the interlayer insulating layer 35, as shown in FIG. Figure 16 shown.

[0099] Step 300: forming an insulating layer 36 on the source / drain electrodes 33, and forming a pixel defining layer 40 in the display area and a light absorbing layer 70 in the non-display area on the insulating layer 36. Figure 8-10 and Figure 12-13 shown.

[0100] Figure 17 A top view of a display panel according to an embodiment of the present disclosure is shown. The display panel in this embodiment is divided into a display area P1 and a non-display area P2 surrounding the display area P1. A fan-out area P3 is provided in the non-display area P2. The display panel includes: a substrate 10 and a first power supply line provided on the substrate 10. The first portion 20 of the first power supply line is provided in the fan-out area P3 and is used to transmit a first power supply signal, such as the power supply signal VDD in the display panel. The first power supply line is typically a film layer made of Ti / Al / Ti. The first portion includes a sheet line 210 near the edge of the display panel, a plurality of strip lines 220 extending from the sheet line 210 toward the display area P1 and spaced apart from each other, and a bus bar 230 electrically connected to the plurality of strip lines 220. In this embodiment, the sheet line 210, the plurality of strip lines 220, and the bus bar 230 can be integrally formed, that is, they can be prepared from a single piece of metal material through a patterning process. For example, the first portion 20 may be formed by forming a plurality of via holes 200 on a single metal material layer through a patterning process.

[0101] As shown, the display panel further includes a plurality of transfer traces 100 disposed in the fan-out region P3 and electrically connected to the bus bar 230 for transmitting the first power supply to each column of pixel units in the display region P1. For example, when the display region P1 includes multiple columns and rows of pixel units, each transfer trace 100 is electrically connected to the first power signal line 300 of a column of pixel units to provide the first power supply to the column of pixel units.

[0102] In one embodiment, the sheet trace 210 , the plurality of strip traces 220 , the bus bar 230 and the plurality of transfer traces 100 may be integrally formed, ie, may be prepared from a single piece of metal material through a patterning process.

[0103] like Figure 17 As shown, the length of the strip line 220 in the corner area 280 of the first part of the first power line of the display panel is shorter than the strip electrode lines in other areas. This is because the corner area will be covered by the frame of the display panel and thus no reflection will be generated.

[0104] In one embodiment, at least one of the plurality of strip traces 220 includes a first end adjacent to the bus bar 230, and the area of ​​the orthographic projection of the first end on the bus bar 230 gradually increases as it approaches the bus bar 230. In one embodiment, at least one of the plurality of transfer traces 100 includes a second end adjacent to the bus bar 230, and the area of ​​the orthographic projection of the second end on the bus bar 230 gradually increases as it approaches the bus bar 230.

[0105] like Figure 17 As shown, the first inclination angle between the first end of the strip trace 220 and the bus bar 230 is a, and the second inclination angle between the second end of the transfer trace 100 and the bus bar 230 is b. In this embodiment, the first inclination angle a is greater than the second inclination angle b. However, the present disclosure is not limited to this, and the first inclination angle a can also be set to be less than or equal to the second inclination angle b. For example, the absolute value of the angular difference between the first inclination angle a and the second inclination angle b is less than 30°, such as 10°, 15°, 20°, 25°, etc.

[0106] In one embodiment, the sheet trace 210, the plurality of strip traces 220, the bus bar 230, the plurality of transfer traces 100, the corner region 280 in the first portion of the first power trace, and the first power signal line 300 can be integrally formed, that is, they can be prepared from a single piece of metal material through a single patterning process. However, the present disclosure is not limited to this, and any two or more of the sheet trace 210, the plurality of strip traces 220, the bus bar 230, the plurality of transfer traces 100, the corner region 280 in the first portion of the first power trace, and the first power signal line 300 can be arranged to form an integral structure through the same patterning process using a single piece of metal. That is, the first power signal line directly extends out from the display area P1 and is integrally structured with the transfer trace 100, the bus bar 230, the strip trace 220, and the sheet trace 210, for example, in the area where the pixel driver circuit is located.

[0107] In one embodiment, the sheet trace 210, the plurality of strip traces 220, the bus bar 230, the plurality of transfer traces 100, the first power trace, and the first power signal line are arranged on the same layer. However, the present disclosure is not limited thereto; any two or more of the sheet trace 210, the plurality of strip traces 220, the bus bar 230, the plurality of transfer traces 100, the first power trace, and the first power signal line may be arranged on different layers, as long as power supply can be achieved.

[0108] Figure 18 FIG. 1 shows a top view of a display panel according to an embodiment of the present disclosure. Figure 17In addition to the structure shown, the display area is also provided with multiple data lines 400, and the fan-out area is provided with corresponding multiple data line lead-out lines 500. In this embodiment, the data lines 400 and the first power supply lines 300 of the pixel units are generally provided in different layers. The orthographic projections of the multiple data lines 400 on the substrate 10 are respectively located between the orthographic projections of the multiple first power supply lines 300 of the multiple columns of pixel units on the substrate. The multiple data lines 400 are respectively connected to the data signal lines via multiple data line lead-out lines 500. The multiple data line lead-out lines 500 partially overlap with the orthographic projections of the multiple strip lines 220 and the sheet lines 210 on the substrate.

[0109] The first portion 20 of the first power supply line of the present disclosure is not limited to the corner of the non-display area P2 away from the edge of the display area P1. Figures 1 to 3 and Figures 5 to 7 、 Figure 11 For example, Figure 17 and Figure 18 The corner of the first power trace close to the sheet trace 210 is rounded, but this application is not limited to this.

[0110] In order to reduce the resistance of the sheet trace 210, the plurality of strip traces 220, the bus bar 230, the plurality of transfer traces 100, and the corner region 280, additional metal film layers may be connected in parallel above or below the corresponding metal film layers, for example Figure 19A As shown, an additional metal layer 21 is connected in parallel above the strip trace 220; for example Figure 19A As shown, an additional metal layer 21 is connected in parallel above the strip trace 220 .

[0111] The drawings of the embodiments of this application only involve the structures involved in the embodiments of this application, and other structures can refer to the general design.

[0112] For the sake of clarity, the thickness and size of layers or microstructures are exaggerated in the drawings used to describe the embodiments of the present application. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element can be "directly on" or "under" the other element, or intervening elements may be present.

[0113] Although the embodiments disclosed in this application are as described above, the contents described are merely embodiments adopted to facilitate understanding of this application and are not intended to limit this application. Any person skilled in the art to which this application belongs may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application. However, the scope of patent protection of this application shall still be based on the scope defined by the attached claims.

Claims

1. A display panel, wherein: The display panel includes a display area and a non-display area at least partially surrounding the display area, wherein the non-display area is provided with a fan-out region. The display panel includes a substrate and a first power line arranged on the substrate, wherein the first power line includes a first portion arranged in the fan-out area; The first portion includes a sheet trace close to an edge of the display panel and a first sub-portion extending from the sheet trace toward the display area; as well as The orthographic projection area of ​​the first sub-portion on the substrate within a unit area is smaller than the orthographic projection area of ​​the sheet trace on the substrate; The first sub-portion includes a plurality of strip-shaped traces spaced apart from each other; The first part further includes a bus bar, which is arranged on a side of the plurality of strip-shaped traces away from the sheet-shaped traces, and the plurality of strip-shaped traces are all connected to the bus bar; and At least one of the plurality of strip-shaped traces includes a first end portion adjacent to a bus bar, and an area of ​​an orthographic projection of the first end portion on the bus bar gradually increases as the area approaches the bus bar.

2. The display panel according to claim 1, wherein The display area includes a plurality of pixel units; The display panel further includes a plurality of transfer lines electrically connected between the plurality of strip lines and the plurality of pixel units, and The plurality of transfer lines are arranged in the fan-out area.

3. The display panel according to claim 2, wherein: The plurality of pixel units include a plurality of rows and columns of pixel units; and Each of the plurality of transfer lines is electrically connected to a first power signal line of a corresponding column of pixel units among the plurality of columns of pixel units.

4. The display panel according to claim 3, wherein: The plurality of transfer traces are all electrically connected to the bus bar at a side away from the display area.

5. The display panel according to claim 4, wherein: At least one of the plurality of transfer traces includes a second end portion adjacent to the bus bar, and an orthographic projection of the second end portion on the bus bar gradually increases in area as the second end portion approaches the bus bar. The display panel according to claim 5 , wherein: A first inclination angle is formed between the first end of the strip-shaped trace and the bus bar; A second inclination angle is formed between the transfer line and the bus bar; and An absolute value of an angular difference between the first inclination angle and the second inclination angle is less than 30°.

7. The display panel according to claim 4, wherein: The distance between any two adjacent strip lines among the plurality of strip lines is the distance between the center lines of the two adjacent strip lines, and the distance difference between at least two adjacent strip lines among the plurality of strip lines is no more than 10 μm.

8. The display panel according to claim 4, wherein: The distance between at least two adjacent strip-shaped wirings is between 0.5 and 2 times the distance between at least two adjacent columns of pixel units in the multiple rows and columns of pixel units.

9. The display panel according to claim 3, wherein: The display area further includes a plurality of data lines, and the fan-out area further includes a plurality of data line lead-out lines; The orthographic projections of the plurality of data lines on the substrate are respectively located between the orthographic projections of the plurality of first power signal lines of the plurality of columns of pixel units on the substrate; The plurality of data lines are respectively connected to the data signal lines through the plurality of data line lead lines; and The plurality of data line lead-out lines partially overlap with the orthographic projections of the plurality of strip-shaped routing lines and the sheet-shaped routing lines on the substrate.

10. The display panel according to any one of claims 1 to 9, wherein: The substrate is flexible.

11. A method for preparing a display panel according to any one of claims 1 to 10, wherein: The display panel is divided into a display area and a non-display area partially surrounding the display area, and the non-display area is provided with a fan-out area. The preparation method comprises: A first power supply line for transmitting a first power supply signal is formed on a substrate, so that a first portion of the first power supply line is arranged in the fan-out area, and the first portion includes a sheet line close to an edge of the display panel and a plurality of strip lines extending from the sheet line toward the display area and spaced apart from each other. 12 . The method according to claim 11 , further comprising forming a plurality of transfer traces electrically connected to the first portion in a fan-out region of the substrate, for electrically connecting to a plurality of pixel units of the display panel.

13. A display device comprising: The display panel according to any one of claims 1 to 10; The cover plate is attached to the display panel, and a light shielding layer is provided on the edge of the cover plate to cover the non-display area. The first portion of the first power line is at least partially not covered by the light shielding layer.

14. The display device according to claim 13, further comprising a second power supply line, which is arranged in a position in the fan-out region away from the display area relative to the first power supply line; wherein The light shielding layer at least partially covers the second power supply line.

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