CN111430435A - Display panel, display device, and method for manufacturing display panel - Google Patents

Abstract

The present disclosure discloses a display panel, a display device, and a manufacturing method of the display panel. The display panel includes a display area, a bending area and a binding area. The bending area is located between the display area and the binding area. The bending area is sequentially provided with a substrate, a buffer layer and data lines arranged at intervals. is a groove, the groove extends along the edge of the display area, and the edge of the groove includes at least one slope; the data line is arranged on the buffer layer, and transmits the electrical signal of the binding area to the display area; wherein, adjacent data lines A protruding piece is arranged on the inclined surface between the lines, and the protruding piece is arranged on the inclined surface, and the protruding piece is made of insulating material. According to the technical solutions provided by the embodiments of the present disclosure, the problem of short-circuiting of adjacent data lines caused by patterning the data lines can be solved by arranging the protrusions on the slopes between adjacent data lines in the bending region.

Description

Display panel, display device, and manufacturing method of display panel

technical field

The present disclosure generally relates to the field of display technology, and in particular, to a display panel, a display device, and a manufacturing method of the display panel.

Background technique

With the popularity of narrow-bezel display devices, especially the mobile phone industry, it has entered the era of full-screen displays. In order to facilitate circuit bonding (Bonding) and full-screen narrow border design, in the Active Matrix Organic Light Emitting Display (AMOLED) display panel, the edge of the display panel can be bent (Bending) to form In the bending area, the display area is electrically connected with the binding area through the bending area to realize the transmission of electrical signals.

The bending area generally includes a substrate, a buffer layer, a source drain (SD) and a flat layer that are stacked in sequence, and the signal in the binding area is transmitted to the display area through the SD data line in the bending area. In order to facilitate bending, the bending area is designed with grooves. At this time, the SD metal layer on the edge of the groove is not easy to be etched and easy to form residues, which will short the adjacent SD data lines and cause the risk of X dark lines.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a display panel, a display device, and a manufacturing method of the display panel that prevent short-circuiting of data lines in the bending area.

In a first aspect, a display panel is provided, including a display area, a bending area and a binding area, the bending area is located between the display area and the binding area, and the bending area is sequentially provided with a substrate, a buffer layer and spaced data line,

The surface of the buffer layer is a groove, the groove extends along the edge of the display area, and the edge of the groove includes at least one bevel;

The data line is arranged on the buffer layer, and transmits the electrical signal of the binding area to the display area;

Wherein, a protruding piece is provided on the inclined surface between adjacent data lines, and the protruding piece is made of insulating material.

In some embodiments, the width of the protruding member is less than or equal to the distance between adjacent data lines.

In some embodiments, the height of the raised member is greater than the height of the data line.

In some embodiments, a plurality of vias are provided on the data line.

In some embodiments, the edge of the groove is a trapezoidal step, including a first step and a second step arranged in sequence, the first step is close to the bottom of the groove, and the second step is far away from the bottom of the groove.

In some embodiments, the protrusions are elongated.

In some embodiments, the starting point of the protruding member is located on the mesa of the second step, and the end point is located at the bottom of the groove, and covers part of the bottom of the groove.

In some embodiments, the display panel further includes a flat layer covering the entire bending area, and the flat layer is located above the data lines.

In a second aspect, a display device is provided, including the display panel provided by each embodiment of the present disclosure.

In a third aspect, a method for manufacturing a display panel is provided, comprising the following steps:

The display panel includes a display area, a bending area and a binding area, and the bending area is located between the display area and the binding area, wherein the bending area is formed according to the following method:

provide the substrate;

forming a base and a buffer layer on the substrate in sequence;

forming a groove on the buffer layer, the groove extending along the edge of the display area, the edge of the groove including a slope;

A plurality of protruding pieces arranged at intervals are formed on the inclined surface;

forming a metal layer, and patterning the metal layer to form a plurality of data lines arranged at intervals, so that the protrusions are located between adjacent data lines;

A flat layer is formed covering the entire bent area.

According to the technical solutions provided by the embodiments of the present disclosure, the problem of short-circuiting of adjacent data lines caused by patterning the data lines can be solved by arranging protruding members between adjacent data lines in the bending region.

Description of drawings

Other features, objects and advantages of the present disclosure will become more apparent upon reading the detailed description of non-limiting embodiments taken with reference to the following drawings:

Figure 1 shows a sectional view of the bent region with metal residue;

FIG. 2 shows an exemplary structural block diagram of a display panel according to an embodiment of the present disclosure;

Fig. 3 shows the C-C sectional view of Fig. 2;

FIG. 4 shows a C-C cross-sectional view of FIG. 2 without the flat layer

Fig. 5 shows the partial enlarged view of D area of Fig. 2;

Fig. 6 shows the A-A sectional view of Fig. 5;

Fig. 7 shows the B-B sectional view of Fig. 5;

FIG. 8 shows an exemplary flowchart of a method of manufacturing a display panel.

Detailed ways

The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related invention, but not to limit the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the invention are shown in the drawings.

Unless otherwise defined, technical or scientific terms used in this disclosure should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used in this disclosure, "first," "second," and similar words do not denote any order, quantity, or importance, but are merely used to distinguish the various components. "Comprising" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to indicate the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

It should be noted that the embodiments of the present disclosure and the features of the embodiments may be combined with each other under the condition of no conflict. The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

FIG. 2 is a schematic diagram of a display panel according to an embodiment of the present disclosure. Referring to FIG. 2 , the display panel includes a display area AA, a bending area H and a binding area B, and the bending area H is located between the display area AA and the binding area B. The display area is electrically connected to the binding area through the data lines on the bending area, so as to realize the transmission of electrical signals from the binding area to the display area.

In the present disclosure, the display panel includes a display area AA, a bending area H, and a binding area B with different film layer structures. The bending area H is used for bending and has no touch function and display function, and the display area AA is used for touch And the display screen, the binding area B is connected with the driving circuit. The driving signal is transmitted to the display area AA through the binding area B and the bending area H, so a data line needs to be provided in the bending area.

FIG. 3 shows the C-C sectional view of FIG. 2 . Referring to FIG. 3, the bending area includes a substrate 101, a buffer layer 102, spaced SD (Source Drain, source drain for short) data lines 104 and a flat layer 106, which are stacked in sequence. SD data line is transmitted to the display area. Wherein, the substrate is a flexible substrate, and the material can be polyimide, so that the display device can be bent, bent or stretched. Please refer to FIG. 2 and FIG. 3, in order to facilitate bending, the buffer layer in the bending area is designed with a groove 107, and the groove 107 extends along the edge of the display area AA. When the SD metal layer is patterned to form the data lines 104 arranged at intervals, the SD metal layer on the stepped slope portion of the edge 107-1 of the groove 107 is not easily etched, and SD metal residues 211 are easily formed, so that the adjacent SD data lines are easily short-circuited. , resulting in the risk of dark X lines, as shown in Figure 1.

In order to solve the above technical problems, the present disclosure provides the following technical solutions.

Please refer to FIG. 2 to FIG. 7 , a display panel includes a display area AA, a bending area H and a binding area B, the bending area H is located between the display area AA and the binding area B, and the bending area H is in turn A substrate 101, a buffer layer 102 and spaced data lines 104 are provided,

The surface of the buffer layer 102 is a groove 107, the groove 107 extends along the edge of the display area, and the edge 107-1 of the groove includes at least one inclined surface 111;

The data line 104 is arranged on the buffer layer 102, and transmits the electrical signal of the binding area B to the display area AA;

Wherein, a protruding member 103 is provided on the inclined surface 111 between adjacent data lines, and the protruding member 103 is made of insulating material.

The material of the protruding member 103 may be resin, or a material having an insulating effect. The data lines 104 arranged at intervals are formed by patterning, that is, after a metal layer is provided in the entire bending region H, a desired pattern is obtained by etching. The metal layer at this time may be an SD metal layer, or other metals that can conduct electricity. As shown in FIG. 5 , in this embodiment, the patterns of the data lines 104 formed are longitudinally spaced patterns, which are perpendicular to the grooves 107 extending along the edge of the display area. As also shown in FIG. 2 , the edge of the display area adjacent to the bending area is located in the lateral direction, so the groove 107 extends from one end of the bending area to the other end in the lateral direction. Clearly there will be data lines 104 at the edge 107-1 of the groove. On the other hand, the adjacent data lines 104 on the inclined plane 111 are likely to be short-circuited due to metal residues. Protrusions 103 are provided on the slopes between the data lines where SD metal residues are likely to be formed, which can effectively prevent the formation of SD metal residues.

In some embodiments, the width W1 of the protruding member is less than or equal to the distance W2 between adjacent data lines. In the process steps, after forming the bumps 103 , the metal layer is patterned to form data lines arranged at intervals. Therefore, the width W1 of the bumps should be smaller than the distance W2 between adjacent data lines in order not to affect the formation of the later data lines. It can be understood that, on the premise that the relevant equipment can satisfy sufficient accuracy, the possibility that the width W1 of the protruding member 103 is equal to the distance W2 between the adjacent data lines 104 is not excluded.

In some embodiments, the height h1 of the protrusion is greater than the height h2 of the data line. When the height h1 of the protruding member is greater than the height h2 of the data line, according to the characteristics of top-down etching, the metal layer above the protruding member 103 can be completely etched away, thereby solving the problem of metal residues caused by the adjacent data lines 104. And the short circuit problem.

As shown in FIG. 5 , in some embodiments, a plurality of vias 108 are provided on the data line 104 . The via hole 108 can reduce stress concentration and play a role in preventing crack propagation. The shape of the via hole 108 may be an ellipse, a circle, a rectangle, etc., which is not limited here, and is set according to an application scenario.

In some embodiments, the edge of the groove 107 is a trapezoidal step, including a first step and a second step arranged in sequence, the first step is close to the bottom of the groove 107 , and the second step is far away from the bottom of the groove 107 . The first step includes an inclined surface 111-1, and the second step includes an inclined surface 111-2. According to application scenarios, the edge of the groove 107 may include one step, two steps, or multiple steps. Here, two steps are used as an example for description. Since the metal residues are formed on the stepped slopes of the metal layer with a large vertical thickness, the protrusions should cover all the slopes. In some embodiments, the protrusions 103 are elongated. The starting point 1 of the protruding piece 103 is located on the mesa of the second step, and the ending point 2 is located at the bottom of the groove and covers part of the bottom of the groove. Taking the edge including two steps as an example, the protruding piece should cover all the inclined surfaces, including the inclined surfaces 111-1 and 111-2. Therefore, the starting point 1 is located on the mesa of the second step, extending to the position of the bottom end point 2 of the groove 107 . As for how much the protruding piece 107 covers the bottom of the groove, it can be set according to the application scenario, which is not limited here. It should be noted that, according to the application scenario, the protruding member 103 may also adopt other shapes such as an ellipse.

In some embodiments, the display panel further includes a flat layer 106 covering the entire bending area, and the flat layer 106 is located above the data lines 104 . The flattening layer 106 serves to flatten the concave and convex surfaces of the data lines 104 arranged at intervals, so as to provide a flat surface for later processes. It is understood that the flat layer will fill the vias 108 on the data lines 104 .

The present disclosure also provides a display device including the display panel provided by the various embodiments of the present disclosure.

FIG. 8 shows an exemplary flowchart of a method of manufacturing a display panel. As shown in FIG. 8 , the present disclosure further provides a manufacturing method of a display panel, the method includes the following steps. The display panel includes a display area, a bending area and a binding area, wherein the bending area is formed as follows:

Step S101: providing a substrate;

Step S102: forming a base and a buffer layer on the substrate in sequence;

Step S103: forming a groove on the buffer layer, the groove extends along the edge of the display area, and the edge of the groove includes a slope;

Step S104: forming a plurality of protruding pieces arranged at intervals on the inclined surface;

Step S105: forming a metal layer, and patterning the metal layer to form a plurality of data lines arranged at intervals, so that the protrusions are located between adjacent data lines;

Step S106 : forming a flat layer covering the entire bending area.

The following description will be made with reference to Fig. 2 to Fig. 7 .

In step S101, the substrate may be a glass substrate.

In step S102, the bending area H may be fabricated simultaneously with the display area AA. At this time, the bending area H may retain the desired film layer of the display area AA and etch away the unnecessary film layer. The required film layers include a substrate 101 and a buffer layer 102, the substrate 101 may be a flexible substrate, and the material may be polyimide, so that the display device can be bent, bent or stretched. The buffer layer 102 may be one film layer or multiple film layers in the display area, which is determined according to the application scenario.

In step S103, in order to make the bending area H easy to bend, a groove 107 is formed on the buffer layer 102, and the groove 107 extends along the edge of the display area AA. The edge of the groove 107 also includes a bevel 111 . For example, the edges of the grooves are trapezoidal steps, or other shapes with beveled edges.

Step S104: forming a plurality of protruding parts 103 on the inclined surface 111, and the protruding parts 103 are arranged in a spaced manner;

In step S105, a patterning process is used to form the data lines 105, and the required pattern of the data lines 104 arranged at intervals is obtained after etching the entire metal layer. The data lines 104 are perpendicular to the extending direction of the grooves, and the protrusions 103 are located between data lines;

In step S106, a flat layer 106 covering the entire bending region is formed.

The above description is merely a preferred embodiment of the present disclosure and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the present disclosure is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, and should also cover the above-mentioned technical features without departing from the inventive concept. Other technical solutions formed by any combination of its equivalent features. For example, a technical solution is formed by replacing the above-mentioned features with the technical features disclosed in the present disclosure (but not limited to) with similar functions.

Claims (10)

1. A display panel is characterized by comprising a display area, a bending area and a binding area, wherein the bending area is positioned between the display area and the binding area, the bending area is sequentially provided with a substrate, a buffer layer and data lines which are arranged at intervals,

the surface of the buffer layer is a groove, the groove extends along the edge of the display area, and the edge of the groove comprises at least one inclined plane;

the data line is arranged on the buffer layer and transmits the electric signal of the binding region to the display region;

and the inclined plane between the adjacent data lines is provided with a protruding part, and the protruding part is made of an insulating material.

2. The display panel according to claim 1, wherein a width of the protrusion is equal to or less than a distance between the adjacent data lines.

3. The display panel according to claim 1, wherein a height of the protrusion is greater than a height of the data line.

4. The display panel according to claim 1, wherein a plurality of via holes are provided on the data line.

5. The display panel according to claim 1, wherein the edge of the groove is a trapezoid step, and the trapezoid step comprises a first step and a second step which are sequentially arranged, the first step is close to the bottom of the groove, and the second step is far away from the bottom of the groove.

6. The display panel according to claim 5, wherein the protrusion member has a long bar shape.

7. The display panel according to claim 6, wherein the protrusion has a start point located on the mesa of the second step and an end point located at the bottom of the groove and covering a portion of the bottom of the groove.

8. The display panel according to claim 1, further comprising a flat layer covering the entire bending region, the flat layer being located above the data line.

9. A display device characterized by comprising the display panel according to any one of claims 1 to 6.

10. A method for manufacturing a display panel, comprising the steps of:

the display panel comprises a display area, a bending area and a binding area, wherein the bending area is positioned between the display area and the binding area, and the bending area is formed according to the following mode:

providing a substrate;

sequentially forming a substrate and a buffer layer on the substrate;

forming a groove on the buffer layer, the groove extending along an edge of the display area, the edge of the groove including a slope;

a plurality of protruding parts arranged at intervals are formed on the inclined surface;

forming a metal layer, and patterning the metal layer to form a plurality of data lines arranged at intervals, so that the protruding parts are positioned between the adjacent data lines;

a flat layer is formed covering the entire bending region.

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