CN113690284B

CN113690284B - Display panel, preparation method thereof and display device

Info

Publication number: CN113690284B
Application number: CN202110968938.2A
Authority: CN
Inventors: 朱大勇; 张伟; 王凌飞; 李�杰; 马彬彬
Original assignee: BOE Technology Group Co Ltd; Chongqing BOE Display Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chongqing BOE Display Technology Co Ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2024-05-28
Anticipated expiration: 2041-08-23
Also published as: CN118434238A; CN113690284A

Abstract

The application discloses a display panel, a preparation method thereof and a display device, and relates to the technical field of display. The display panel comprises a substrate base plate, a plurality of test interfaces, a plurality of sub-pixels and a plurality of first blocking structures positioned between the plurality of test interfaces and the plurality of sub-pixels. The first blocking structures can block the crack around the test interfaces from extending to the display area where the sub-pixels are located, so that the display effect of the display panel is ensured.

Description

Display panel, preparation method thereof and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel, a preparation method thereof and a display device.

Background

Before the display panel leaves the factory, the display performance of a plurality of sub-pixels in the display panel needs to be tested so as to ensure that the display panel can display normally.

In the related art, a display panel includes a substrate, a plurality of sub-pixels located in a display area of the substrate, and a test interface located in a peripheral area of the substrate. The test interface can provide test signals for the plurality of sub-pixels so that the plurality of sub-pixels display images, and further, the display performance of the plurality of sub-pixels is tested.

However, the test interface in the related art generally has a crack around it, and the crack may extend to the display area, thereby affecting the display effect of the display panel.

Disclosure of Invention

The application provides a display panel, a preparation method thereof and a display device, which can solve the problem of poor display effect of the display panel in the related technology. The technical scheme is as follows:

in one aspect, there is provided a display panel including:

A substrate having a display region and a peripheral region located at one side of the display region;

A plurality of sub-pixels located in the display area;

the plurality of test interfaces are positioned in the peripheral area and are electrically connected with the plurality of sub-pixels;

And a plurality of strip-shaped first blocking structures which are arranged at intervals, wherein a plurality of first blocking structures are positioned in the peripheral area, a plurality of first blocking structures are positioned between the plurality of test interfaces and the plurality of sub-pixels, the extending direction of each first blocking structure is intersected with a target direction, and the target direction is the arrangement direction of the peripheral area and the display area.

Optionally, the substrate base plate has a plurality of strip-shaped first hollow areas that are arranged at intervals, and each first blocking structure at least comprises one first hollow area.

Optionally, the display panel further includes an inorganic material film layer and an organic material film layer on the substrate;

the orthographic projection of the inorganic material film layer on the substrate is not overlapped with the intervals among the first blocking structures and the first blocking structures, and the orthographic projection of the organic material film layer on the substrate is not overlapped with the intervals among the first blocking structures and the first blocking structures.

the inorganic material film layer is provided with a second hollowed-out area, and the organic material film layer is provided with a third hollowed-out area; each first blocking structure further comprises a second hollow-out area and a third hollow-out area, wherein each first blocking structure comprises the first hollow-out area, and the second hollow-out area and the third hollow-out area are communicated.

Optionally, the display panel further includes a plurality of connection wires; one end of each connecting wire is connected with one side of one test interface close to the display area, and the other end of each connecting wire is connected with the plurality of sub-pixels;

the orthographic projection of each connecting wire on the substrate is not overlapped with the plurality of first blocking structures, and the orthographic projection of each connecting wire on the substrate is overlapped with the orthographic projection of the organic material film layer on the substrate.

Optionally, the thickness of the portion of the inorganic material film layer, which is located in the target area, in the orthographic projection on the substrate is smaller than the thickness of the portion of the inorganic material film layer, which is located in the other area except the target area, in the orthographic projection on the substrate;

wherein the target area covers orthographic projections of intervals between the plurality of first blocking structures on the substrate base plate.

The inorganic material film layer is provided with a plurality of strip-shaped fourth hollowed-out areas which are arranged at intervals, the extending direction of the fourth hollowed-out areas is intersected with the target direction, and the organic material film layer comprises a first main body part and a plurality of first filling parts which are positioned in the fourth hollowed-out areas; the plurality of first blocking structures at least includes: a plurality of the first filling portions.

Optionally, the inorganic material film layer includes: a first inorganic material sub-film layer and a second inorganic material sub-film layer which are sequentially laminated along a direction away from the substrate base plate; the display panel further comprises a plurality of connecting wires and a first blocking layer, wherein the connecting wires and the first blocking layer are positioned between the first inorganic material sub-film layer and the second inorganic material sub-film layer; one end of each connecting wire is connected with one side of one test interface, which is far away from the display area, and the other end of each connecting wire is connected with the plurality of sub-pixels;

Each fourth hollowed-out area comprises a first sub-hollowed-out area positioned on the first inorganic material sub-film layer and a second sub-hollowed-out area positioned on the second inorganic material sub-film layer, and the first filling part is positioned in the second sub-hollowed-out area; the first blocking layer comprises a second main body part and a second filling part positioned in the first sub-hollowed-out area; the plurality of first blocking structures further comprises: and a plurality of second filling parts.

Optionally, the display panel further includes: a second blocking layer located between the substrate base plate and the first inorganic material sub-film layer;

The substrate base plate is provided with a plurality of strip-shaped fifth hollowed-out areas which are arranged at intervals, the extending direction of the fifth hollowed-out areas is intersected with the target direction, and the second blocking layer comprises a third main body part and a plurality of third filling parts which are positioned in the plurality of fifth hollowed-out areas; the plurality of first blocking structures further comprises: and a plurality of third filling parts.

Optionally, the display panel further includes: a second blocking structure in the form of a strip;

The second blocking structure is located in the peripheral area, the second blocking structure is located at one side of the plurality of test interfaces along the target direction, the extending direction of the second blocking structure is parallel to the target direction, and the second blocking structure is connected with the first blocking structure.

In another aspect, a method for manufacturing a display panel is provided, the method including:

Acquiring a substrate, wherein the substrate is provided with a display area and a peripheral area positioned at one side of the display area;

forming a plurality of sub-pixels and a plurality of test interfaces, wherein the sub-pixels are positioned in a display area, the test interfaces are positioned in the peripheral area, and the test interfaces are electrically connected with the sub-pixels;

And forming a plurality of strip-shaped first blocking structures which are arranged at intervals, wherein a plurality of first blocking structures are positioned in the peripheral area, the first blocking structures are positioned between the plurality of test interfaces and the plurality of sub-pixels, the extending direction of each first blocking structure is intersected with a target direction, and the target direction is the arrangement direction of the peripheral area and the display area.

Optionally, the obtaining a substrate includes:

Providing an initial substrate, wherein the initial substrate is provided with a display area, a peripheral area positioned at one side of the display area and an area to be cut positioned at one side of the peripheral area away from the display area;

forming a plurality of strip-shaped third blocking structures which are arranged at intervals in the region to be cut, wherein the extending direction of each third blocking structure is intersected with the target direction;

and cutting the initial substrate along the area to be cut to obtain a substrate.

In still another aspect, there is provided a display device including: a power supply assembly and a display panel as described in the above aspects;

the power supply assembly is used for supplying power to the display panel.

The technical scheme provided by the application has the beneficial effects that at least:

The application provides a display panel, a preparation method thereof and a display device. The first blocking structures can block the crack around the test interfaces from extending to the display area where the sub-pixels are located, so that the display effect of the display panel is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application;

FIG. 2 is a top view of a substrate base plate provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a display panel according to an embodiment of the present application;

Fig. 4 is a sectional view of the display panel shown in fig. 3 along the BB direction;

FIG. 5 is a schematic diagram of a portion of another display panel according to an embodiment of the present application;

fig. 6 is a sectional view of the display panel shown in fig. 5 in the CC direction;

FIG. 7 is a schematic diagram of a portion of another display panel according to an embodiment of the present application;

FIG. 8 is a cross-sectional view of the display panel shown in FIG. 7 along DD;

FIG. 9 is a schematic diagram of a portion of a display panel according to another embodiment of the present application;

fig. 10 is a sectional view of the display panel shown in fig. 9 along the EE direction;

FIG. 11 is a cross-sectional view of a substrate base plate and an inorganic material film layer provided by an embodiment of the present application;

FIG. 12 is a schematic view of a portion of a substrate and an inorganic material film layer according to an embodiment of the present application;

FIG. 13 is a schematic view of a portion of a display panel according to another embodiment of the present application;

fig. 14 is a sectional view of the display panel shown in fig. 13 in FF direction;

Fig. 15 is a cross-sectional view of a display panel according to an embodiment of the present application;

FIG. 16 is a top view of the display panel shown in FIG. 15;

FIG. 17 is a top view of the display panel of FIG. 15 with the organic material film layer and the second inorganic material sub-film layer removed;

FIG. 18 is a cross-sectional view of another display panel provided by an embodiment of the present application;

FIG. 19 is a top view of the display panel shown in FIG. 18;

FIG. 20 is a top view of the display panel of FIG. 18 with the organic material film layer and the second inorganic material sub-film layer removed;

FIG. 21 is a top view of a second blocking layer in the display panel of FIG. 18;

FIG. 22 is a schematic diagram of a portion of a display panel according to another embodiment of the present application;

fig. 23 is a sectional view of the display panel shown in fig. 22 in a GG direction;

FIG. 24 is a cross-sectional view of yet another display panel provided by an embodiment of the present application;

fig. 25 is a schematic structural diagram of another display panel according to an embodiment of the present application;

Fig. 26 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present application;

FIG. 27 is a flowchart of another method for manufacturing a display panel according to an embodiment of the present application;

FIG. 28 is a partial top view of a display panel forming a third blocking structure according to an embodiment of the present application;

Fig. 29 is a cross-sectional view of fig. 28 in the HH direction;

fig. 30 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

Before the display panel leaves the factory, the display performance of a plurality of sub-pixels in the display panel needs to be tested, which is commonly called exploratory (exploratory, ET) lighting test, so as to ensure the yield of the display panel after leaving the factory.

The substrate of the display panel can be provided with a plurality of test interfaces (pins) for ET lighting test, and the test equipment is connected with the plurality of test interfaces, so that the test interfaces provide test signals for a plurality of sub-pixels, and the display performance of the sub-pixels is tested. In general, after the ET lighting test is completed, a plurality of test interfaces disposed on the substrate may be cut off by a cutting process, and the test interfaces may not be included in the final display panel shipped from the factory.

However, after the ET lighting test is completed, a plurality of test interfaces disposed on the substrate need to be cut off by a dicing process, so that the distances between the plurality of test interfaces and the plurality of sub-pixels are generally large, which easily causes burn of connection traces between the plurality of test interfaces and the plurality of sub-pixels during the ET lighting test.

Therefore, in order to avoid burn-in during the ET lighting test, the distances between the plurality of test interfaces and the plurality of sub-pixels can be designed to be smaller. Therefore, after the ET lighting test is completed, a plurality of test interfaces arranged on the substrate base plate can not be cut off through a cutting process, and finally the display panel leaving the factory can comprise the test interfaces. But the test interface typically has a crack (ack) around it that can extend to the display area, affecting the display effect of the display panel.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application. As can be seen with reference to fig. 1, the display panel 10 may include: the display device comprises a substrate base plate 101, a plurality of sub-pixels 102, a plurality of test interfaces 103 and a plurality of strip-shaped first blocking structures 104 which are arranged at intervals.

Fig. 2 is a top view of a substrate base plate according to an embodiment of the present application. Referring to fig. 2, the substrate 101 may have a display region 101a and a peripheral region 101b located at one side of the display region 101 a. As can be seen in fig. 1 and 2, the plurality of sub-pixels 102 are located in the display area 101a, the plurality of test interfaces 103 are located in the peripheral area 101b, and the plurality of test interfaces 103 may be electrically connected to the plurality of sub-pixels 102 (connection relationship not shown in fig. 1). The plurality of test interfaces 103 may be used to provide test signals to the plurality of subpixels 102 to test the display performance of the plurality of subpixels 102.

Alternatively, the display area 101a may be referred to as an effective display area (ACTIVE AREA, AA) or AA region. Wherein the plurality of subpixels 102 are located in the display area 101a may be used to represent: the area where the front projection of the plurality of sub-pixels 102 on the substrate 101 is located may be a display area 101a.

Referring to fig. 1, a plurality of first blocking structures 104 are located in the peripheral region 101b, and a plurality of first blocking structures 104 are located in the peripheral region 101b. The plurality of first blocking structures 104 may be located between the plurality of test interfaces 103 and the plurality of subpixels 102. Also, the extension direction Y of each of the first blocking structures 104 may intersect with a target direction X, which may be an arrangement direction of the peripheral region 101b and the display region 101 a.

The plurality of first blocking structures 104 may be used to block the extension paths of the cracks around the plurality of test interfaces 103, prevent the cracks around the plurality of test interfaces 103 from extending to the display area 101a, and ensure the display effect of the display panel 10.

In addition, since the extending direction Y of the first blocking structure 104 intersects the target direction X (the arrangement direction of the peripheral region 101b and the display region 101 a), it is also possible to prevent the crack around the plurality of test interfaces 103 from extending to the display region 101a along the first blocking structure 104 or the interval between the plurality of first blocking structures 104, and to effectively ensure that the first blocking structure 104 blocks the crack from extending.

Alternatively, the extending direction Y of the first blocking structure 104 may be perpendicular to the target direction X. For example, in fig. 1, the extending direction Y of the first blocking structure 104 may be a pixel row direction of the display panel 10, and the target direction X may be a pixel column direction of the display panel 10.

In summary, the embodiment of the application provides a display panel, which includes a substrate, a plurality of test interfaces, a plurality of sub-pixels, and a plurality of first blocking structures between the plurality of test interfaces and the plurality of sub-pixels. The first blocking structures can block the crack around the test interfaces from extending to the display area where the sub-pixels are located, so that the display effect of the display panel is ensured.

Alternatively, the material of the test interface 104 may be metal. The test interface 104 may be co-located with the source-drain layers of the subpixels 102 in the display panel 10. That is, the test interface 104 may be made of the same material and by the same patterning process as the source/drain layer of the subpixel 102.

Fig. 3 is a schematic diagram of a portion of a display panel according to an embodiment of the application. Fig. 4 is a sectional view of the display panel shown in fig. 3 in the BB direction. Referring to fig. 3 and fig. 4, it can be seen that the substrate 101 may have a plurality of strip-shaped first hollow areas a1 arranged at intervals, and the first hollow areas a1 may penetrate through the substrate 101.

In this case, each of the first blocking structures 104 may include a first hollowed-out area a1. Therefore, when the cracks around the plurality of test interfaces 103 extend to the boundary of the first hollow area a1 (the first blocking structure 104), the cracks can be blocked by the first hollow area a1, so that the cracks are prevented from extending to the display area 101a, and the display effect of the display panel 10 is ensured. In addition, the portion of the substrate 101 where the first hollowed-out region a1 is provided has good bending performance, and bending cracks of the display panel 10 during bending can be avoided.

Optionally, the forming method of the first blocking structure 104 may include: coating a photoresist on one side of the substrate base 101; exposing the photoresist by adopting a first mask plate; developing the exposed photoresist; etching the region of the substrate 101 not protected by the photoresist; the photoresist is removed. The etching region may form a first hollow region a1, where the first hollow region a1 is the first blocking structure 104.

Fig. 5 is a schematic partial view of another display panel according to an embodiment of the application. Fig. 6 is a sectional view of the display panel shown in fig. 5 in the CC direction. As can be seen with reference to fig. 5 and 6, the display panel 10 may further comprise an inorganic material film layer 105 and an organic material film layer 106 on the substrate base 101. The front projections of the plurality of test interfaces 103 onto the substrate 101 overlap with the front projections of the inorganic material film layers 105105 onto the substrate 101 and do not overlap with the front projections of the organic material film layers 106 onto the substrate 101. Alternatively, the organic material film layer 106 may be a planar layer (planarization layer, PLN).

Referring to fig. 6, the orthographic projection of the inorganic material film layer 105 on the substrate base 101 is not overlapped with the plurality of first blocking structures 104 and the intervals between the plurality of first blocking structures 104. The orthographic projection of the organic material film layer 106 on the substrate 101 does not overlap with the first blocking structures 104 and the intervals between the first blocking structures 104.

Optionally, the forming method of the first blocking structure 104 may include: coating a photoresist on one side of the organic material film layer 106; exposing the photoresist by adopting a second mask plate; developing the exposed photoresist, and etching the organic material film layer 106, the inorganic material film layer 105 and the area of the substrate 101 which is not protected by the photoresist; removing the photoresist; recoating photoresist on one side of the organic material film layer 106; exposing the photoresist by adopting a third mask plate, and developing the exposed photoresist; etching the region of the organic material film layer 106 and the inorganic material film layer 105 which is not protected by the photoresist; the photoresist is removed. In this case, only the organic material film layer 106 and the inorganic material film layer 105 may be etched in the second etching, without etching the substrate 101. The etch depth may be controlled by the etch duration.

In this case, each of the first blocking structures 104 may include a first hollowed-out area a1. Therefore, when the cracks around the plurality of test interfaces 103 extend to the boundary of the first hollow area a1 (the first blocking structure), the cracks can be blocked by the first hollow area a1, so that the cracks are prevented from extending to the display area 101a, and the display effect of the display panel 10 is ensured. In addition, the portion of the substrate 101 where the first hollowed-out region a1 is provided has good bending performance, and bending cracks of the display panel 10 during bending can be avoided.

Fig. 7 is a schematic partial view of another display panel according to an embodiment of the application. Fig. 8 is a cross-sectional view of the display panel shown in fig. 7 along the DD direction. Referring to fig. 7 and 8, it can be seen that the inorganic material film layer 105 may have a second hollowed-out region a2, and the organic material film layer 106 may have a third hollowed-out region a3.

In this case, each of the first blocking structures 104 may include a second hollowed-out area a2 and a third hollowed-out area a3 in addition to the first hollowed-out area a1 of the substrate 101. In addition, each first blocking structure 104 includes a first hollow area a1, a second hollow area a2, and a third hollow area a3 that are communicated. Therefore, when the cracks around the plurality of test interfaces 103 extend to the boundary of the first hollow area a1, the second hollow area a2 or the third hollow area a3, the cracks can be blocked by the first hollow area a1, the second hollow area a2 or the third hollow area a3, so that the cracks are prevented from extending to the display area 101a, and the display effect of the display panel 10 is ensured. In addition, the portions of the first hollow area a1, the second hollow area a2 and the third hollow area a3 in the display panel 10 have better bending performance, so that bending cracks of the display panel 10 during bending can be avoided.

Optionally, the forming method of the first blocking structure 104 may include: coating a photoresist on one side of the organic material film layer 106; exposing the photoresist by adopting a fourth mask plate; developing the exposed photoresist, and etching the organic material film layer 106, the inorganic material film layer 105 and the area of the substrate 101 which is not protected by the photoresist; the photoresist is removed.

Therefore, the first hollow area a1, the second hollow area a2, and the third hollow area a3 in each first blocking structure 104 can be obtained by one etching. The first hollow area a1 may penetrate through the substrate 101, the second hollow area a2 may penetrate through the inorganic material film 105, and the third hollow area a3 may penetrate through the organic material film 106.

Referring to fig. 5 to 8, the display panel 10 may further include a plurality of connection traces 107, and one end of each connection trace 107 is connected to a side of one test interface 103 away from the display area 101a, and the other end is connected to a plurality of sub-pixels 102. For example, the other end of each connection trace 107 may be routed from the side of the test interface 103 away from the display area 101a through the peripheral area 101b to the display area 101a and connected to a plurality of sub-pixels 102 in the display area 101 a.

Fig. 9 is a schematic partial view of a display panel according to another embodiment of the application. Fig. 10 is a sectional view of the display panel shown in fig. 9 along the EE direction. Referring to fig. 9 and 10, one end of each of the plurality of connection traces 107 in the display panel 10 may be connected to one side of one test interface 103 near the display area 101a, and the other end is connected to the plurality of sub-pixels 102. That is, in this implementation, the connection trace 107 is directly connected to the plurality of sub-pixels 102 without winding from the peripheral region 101b to the display region 101a.

Referring to fig. 9 and 10, the display panel 10 may further include dummy wirings 108 at the same layer as the plurality of connection wirings 107. Wherein the dummy trace 108 does not function as a transmission signal. The dummy trace 108 and the connection trace 107 being located on the same layer may mean that the dummy trace 108 and the connection trace 107 are made of the same material and by the same patterning process. For example, the material of the dummy wiring 108 and the connection wiring 107 may be metal, and the dummy wiring 108 and the connection wiring 107 may be prepared in the same layer as a gate (gate) layer of the sub-pixel 102 in the display panel 10.

Referring to fig. 9, the front projection of each connection trace 107 on the substrate 101 does not overlap with the plurality of first blocking structures 104, and the front projection of each connection trace 107 on the substrate 101 overlaps with the front projection of the organic material film layer 106 on the substrate 101.

In which fig. 9 shows four test interfaces 103 and corresponding four connection traces 107. And, there may be at least one first blocking structure 104 between every two adjacent connection wires 107. For example, in fig. 9, there are four first blocking structures 104 between every two adjacent connection traces 107.

Optionally, the forming method of the first blocking structure 104 may include: coating a photoresist on one side of the organic material film layer 106; exposing the photoresist by adopting a fifth mask plate; developing the exposed photoresist, and etching the organic material film layer 106, the inorganic material film layer 105 and the area of the substrate 101 which is not protected by the photoresist; the photoresist is removed.

The method for forming the first blocking structure 104 in fig. 10 is the same as the method for forming the first blocking structure 104 in fig. 8, except that the mask plate is different, so that the shape of the finally formed first blocking structure 104 is different. For example, the length of the first blocking structure 104 in the extending direction thereof in fig. 10 is smaller than the length of the first blocking structure 104 in the extending direction thereof in fig. 8, and the number of the first blocking structures 104 in fig. 10 is larger than the number of the first blocking structures 104 in fig. 8.

Referring to fig. 10, the thickness d1 of the portion of the inorganic material film layer 105 that is located at the target region in the front projection on the substrate 101 is smaller than the thickness d2 of the portion of the inorganic material film layer 105 that is located at the other region than the target region in the front projection on the substrate 101. Wherein the target area covers an orthographic projection of the spaces between the plurality of first blocking structures 104 on the substrate base 101.

The inorganic material film layer 105 is more likely to cause crack propagation around the test interface 103 than the organic material film layer 106. Thus, by making the thickness of the portion of the inorganic material film layer 105 where the orthographic projection on the substrate base plate 101 is located at the target region smaller, it is possible to prevent cracks from extending to the display region 101a through the inorganic material film layer 105 in the intervals between the plurality of first blocking structures 104, ensuring the display effect of the display panel 10.

Alternatively, the orthographic projection of the target area covering the intervals between the plurality of first blocking structures 104 on the substrate 101 may be used to represent: the length of the projection of the target area along the target direction X is greater than or equal to the distance between two first blocking structures 104 having the greatest distance along the target direction X among the plurality of first blocking structures 104. And, a length of the projection of the target area along the extending direction perpendicular to the first blocking structures 104 is greater than or equal to a distance between two first blocking structures 104 having the greatest distance along the extending direction among the plurality of first blocking structures 104.

Fig. 11 is a cross-sectional view of a substrate base and an inorganic material film layer provided in an embodiment of the present application. Fig. 12 is a schematic partial view of a substrate and an inorganic material film layer according to an embodiment of the present application. Referring to fig. 11 and 12, the inorganic material film layer 105 may have a plurality of stripe-shaped fourth hollowed-out regions a4 arranged at intervals, and an extending direction of the fourth hollowed-out regions a4 intersects with the target direction X. Referring to fig. 11 and 12, the fourth hollowed-out region a4 may expose the substrate 101 located at one side of the inorganic material film layer 105.

Fig. 13 is a schematic partial view of a display panel according to another embodiment of the application. Fig. 14 is a sectional view of the display panel shown in fig. 13 in FF direction. Referring to fig. 13 and 14, the organic material film layer 106 may include a first body portion 1061 and a plurality of first filling portions 1062 located in a plurality of fourth hollowed-out areas a 4.

In this case, the plurality of first blocking structures 104 may include at least a plurality of first filling portions 1062. For example, a first blocking structure 104 includes a first filler portion 1062. Accordingly, when the cracks around the plurality of test interfaces 103 extend to the boundary of the first filling portion 1062, the cracks can be blocked by the first filling portion 1062, and further the cracks are prevented from extending to the display area 101a, thereby ensuring the display effect of the display panel 10. Further, the portion of the display panel 10 at the first filling portion 1062 has good bending performance, and bending cracks can be prevented from occurring in bending the display panel 10.

Optionally, the forming method of the first blocking structure 104 may include: after the inorganic material film layer 105 is formed, a photoresist is coated on one side of the inorganic material film layer 105; exposing the photoresist by adopting a sixth mask plate; developing the exposed photoresist; etching the region of the inorganic material film layer 105 which is not protected by the photoresist to obtain a plurality of fourth hollowed-out regions a4; removing the photoresist; an organic material film layer 106 is formed on a side of the inorganic material film layer 105 away from the substrate 101, so that the organic material film layer 106 can be filled into the fourth hollow area a 4. The first filling portion 1062 filled into the fourth hollow region a4 is the first blocking structure 104.

Fig. 15 is a cross-sectional view of a display panel according to an embodiment of the present application. Fig. 16 is a top view of the display panel shown in fig. 15. Fig. 17 is a top view of the display panel shown in fig. 15 with the organic material film layer and the second inorganic material sub-film layer removed. Referring to fig. 15 to 17, the inorganic material film layer 105 may include: a first inorganic material sub-film layer 1051 and a second inorganic material sub-film layer 1052, which are sequentially stacked in a direction away from the base substrate 101. The display panel 10 further includes a plurality of connection traces 107 and a first blocking layer 109 between the first and second inorganic material sub-film layers 1051 and 1052.

Alternatively, the connection trace 107 and the first blocking layer 109 are located on the same layer, and the connection trace 107 and the first blocking layer 109 may be made of the same material and by the same manufacturing process. For example, the materials of the connection trace 107 and the first blocking layer 109 are both metal, and the connection trace 107 and the first blocking layer 109 may be prepared in the same layer as the gate layer of the sub-pixel 102 of the display panel 10.

One end of each connection wire 107 is connected to one side of one test interface 103 away from the display area 101a, and the other end is connected to a plurality of sub-pixels 102. For example, the other end of each connection trace 107 may be routed from the side of the test interface 103 away from the display area 101a through the peripheral area 101b to the display area 101a and connected to a plurality of sub-pixels 102 in the display area 101 a.

Optionally, each fourth hollowed-out area a1 includes a first sub-hollowed-out area located in the first inorganic material sub-film 1051 and a second sub-hollowed-out area located in the second inorganic material sub-film 1052. Referring to fig. 15, the first filling portion 1062 of the organic material film 106 is located in the second hollow region. The first blocking layer 109 includes a second main body 1091 and a second filling portion 1092 located in the first hollow region. The first sub-hollowed-out area and the second sub-hollowed-out area are not illustrated in fig. 15.

In this case, the plurality of first blocking structures 104 may include: a plurality of first filling portions 1062 and a plurality of second filling portions 1092. Referring to fig. 15, the plurality of first filling portions 1062 and the plurality of second filling portions 1092 are staggered in the target direction X. Of course, the plurality of first filling portions 1062 and the plurality of second filling portions 1092 do not need to be staggered in the target direction X. For example, there may be no first filling portion 1062 between two second filling portions 1092 adjacent in the target direction X, or there may be two or more first filling portions 1062. The embodiment of the present application is not limited thereto.

Optionally, the forming method of the first blocking structure 104 may include: after forming the first inorganic material sub-film layer 1051, coating a photoresist on one side of the first inorganic material sub-film layer 1051; exposing the photoresist by adopting a seventh mask plate; developing the exposed photoresist; etching the region, which is not protected by the photoresist, of the first inorganic material sub-film layer 1051 to obtain a first sub-hollowed-out region; removing the photoresist; forming a first blocking layer 109 on a side of the first inorganic material sub-film layer 1051 away from the substrate 101, such that the first blocking layer 109 can be filled into the first sub-hollowed-out area; forming a second inorganic material sub-film layer 1052 on a side of the first blocking layer 109 away from the base substrate 101; coating photoresist on one side of the second inorganic material sub-film layer 1052; exposing the photoresist by adopting an eighth mask plate; developing the exposed photoresist; etching the area which is not protected by the photoresist in the second inorganic material sub-film layer 1052 to obtain a second sub-hollowed-out area; removing the photoresist; an organic material film layer 106 is formed on a side of the second inorganic material sub-film layer 1052 remote from the substrate 101, such that the organic material film layer 106 can fill into the second sub-hollowed-out area. The second filling portion 1092 filled into the first hollow-out area and the first filling portion 1062 filled into the second hollow-out area are the first blocking structure 104.

Fig. 18 is a cross-sectional view of another display panel according to an embodiment of the present application. Fig. 19 is a top view of the display panel shown in fig. 18. Fig. 20 is a top view of the display panel shown in fig. 18 with the organic material film layer and the second inorganic material sub-film layer removed. Fig. 21 is a top view of a second blocking layer in the display panel shown in fig. 18. Referring to fig. 18 to 21, the display panel 10 further includes: a second blocking layer 110 located between the base substrate 101 and the first inorganic material sub-film layer 1051. The substrate 101 has a plurality of strip-shaped fifth hollow areas (not shown in the figure) arranged at intervals, and the extending direction of the fifth hollow areas may intersect with the target direction X. The second blocking layer 110 may include a third body portion 1101, and a plurality of third filling portions 1102 located in a plurality of fifth hollowed-out regions.

In this case, the plurality of first blocking structures 104 may include: a plurality of first filling portions 1062, a plurality of second filling portions 1092, and a plurality of third filling portions 1102. Referring to fig. 18 to 20, an area where the orthographic projections of the plurality of third filling portions 1102 on the substrate base plate 101 may overlap with the orthographic projections of the test interface 103 on the substrate base plate 101. The orthographic projection of the plurality of first filling portions 1062 on the substrate 101 does not overlap with the orthographic projection of the test interface 103 on the substrate 101. The orthographic projections of the plurality of second filling portions 1092 on the substrate 101 do not overlap with the orthographic projections of the test interface 103 on the substrate 101.

Referring to fig. 18, the plurality of first blocking structures 104 may be a step structure, so that it is capable of effectively preventing the crack around the plurality of test interfaces 103 from extending to the display area 101a, and the effect of blocking the crack extension by the first blocking structures 104 is better.

Fig. 22 is a schematic partial view of a display panel according to another embodiment of the application. Fig. 23 is a sectional view of the display panel shown in fig. 22 in the GG direction. As can be seen with reference to fig. 22 and 23, the display panel 10 may further include: a second blocking structure 111 in the form of a strip. The second blocking structure 111 is located in the peripheral area 101b, and the second blocking structure 111 is located at one side of the plurality of test interfaces 103 along the target direction X. For example, two second blocking structures 111 are respectively disposed on both sides of the plurality of test interfaces 103 along the target direction X. The extending direction of the second blocking structure 111 is parallel to the target direction X, and the second blocking structure 111 is connected to the first blocking structure 104.

Alternatively, fig. 22 exemplifies that the first blocking structure 104 includes a first filling portion 1062. Correspondingly, the inorganic material film layer 105 may have a plurality of strip-shaped sixth hollow areas, and the extending direction of the sixth hollow areas is parallel to the target direction X. The second blocking structure 111 is located in the sixth hollow region.

By providing the second blocking structure 111 at one side of the plurality of test interfaces 103 along the target direction X, it is possible to further prevent cracks around the test interfaces 103 from extending from one side of the test interfaces 103 along the target direction X, and to ensure the yield of the display panel.

Fig. 24 is a cross-sectional view of still another display panel according to an embodiment of the present application. As can be seen with reference to fig. 24, the substrate base 101 may include a first base plate 1011 and a second base plate 1012. The inorganic material film layer 105 may further include a third inorganic material sub-film layer 1053. The first substrate 1011, the third inorganic material sub-film 1051, the second substrate 1012, the first inorganic material sub-film 1051, and the second inorganic material sub-film 1052 are stacked in this order.

Alternatively, the material of the first substrate 1011 and the second substrate 1012 in the substrate 101 may be Polyimide (PI).

Fig. 25 is a schematic structural diagram of another display panel according to an embodiment of the application. Referring to fig. 25, it can be seen that the display panel 10 may further include a bonding interface 112, and the bonding interface 112 may be located at a side of the test interface 103 near the edge of the substrate board 101. Further, since the size of the binding interface 112 is small relative to the size of the test interface 103, the possibility of occurrence of cracks around the binding interface 112 is smaller than the possibility of occurrence of cracks around the test interface 103.

Alternatively, the display panel 10 may be a folded display panel. The folding line of the folding display panel 10 may be a middle line M shown in fig. 25. Since the display panel provided with the first blocking structure 104 in the embodiment of the application has better bending performance, when the folded display panel 10 is bent along the folding line M, the folded display panel 10 can be prevented from generating bending cracks.

Fig. 26 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present application. The method can be used for preparing the display panel provided by the embodiment. Referring to fig. 26, the method may include:

Step 201, obtaining a substrate base plate.

The substrate 101 has a display region 101a and a peripheral region 101b located on the display region 101a side.

Step 202, forming a plurality of sub-pixels and a plurality of test interfaces.

In the embodiment of the present application, the plurality of sub-pixels 102 are located in the display area 101a, the plurality of test interfaces 103 are located in the peripheral area 101b, and the plurality of test interfaces 103 may be electrically connected to the plurality of sub-pixels 102. The plurality of test interfaces 103 may be used to provide test signals to the plurality of subpixels 102 to test the display performance of the plurality of subpixels 102.

Step 203, forming a plurality of strip-shaped first blocking structures which are arranged at intervals.

In the embodiment of the present application, the plurality of first blocking structures 104 are located in the peripheral region 101b, and the plurality of first blocking structures 104 are located in the peripheral region 101b. The plurality of first blocking structures 104 may be located between the plurality of test interfaces 103 and the plurality of subpixels 102. Also, the extension direction Y of each of the first blocking structures 104 may intersect with a target direction X, which may be an arrangement direction of the peripheral region 101b and the display region 101 a.

In addition, since the extending direction Y of the first blocking structure 104 intersects the target direction X (the arrangement direction of the peripheral region 101b and the display region 101 a), it is also possible to prevent the crack around the plurality of test interfaces 103 from extending to the display region 101a along the first blocking structure 104 or the interval between the plurality of first blocking structures 104, and to effectively ensure the effect of blocking the crack extension by the first blocking structure 104.

In summary, the embodiment of the application provides a method for manufacturing a display panel, where the display panel manufactured by the method includes a substrate, a plurality of test interfaces, a plurality of sub-pixels, and a plurality of first blocking structures between the plurality of test interfaces and the plurality of sub-pixels. The first blocking structures can block the crack around the test interfaces from extending to the display area where the sub-pixels are located, so that the display effect of the display panel is ensured.

Fig. 27 is a flowchart of another method for manufacturing a display panel according to an embodiment of the present application. The method can be used for preparing the display panel provided by the embodiment. Referring to fig. 27, the method may include:

Step 301, providing an initial substrate.

In the embodiment of the application, an initial substrate can be obtained first when the display panel is manufactured. The initial substrate may have a display area, a peripheral area located at one side of the display area, and an area to be cut located at one side of the peripheral area away from the display area.

The to-be-cut region may be used to cut the initial substrate along the to-be-cut region after the other film layers are subsequently formed.

Step 302, forming a plurality of sub-pixels and a plurality of test interfaces.

Step 303, forming a plurality of strip-shaped first blocking structures which are arranged at intervals.

Step 304, forming a plurality of strip-shaped third blocking structures which are arranged at intervals in the area to be cut.

In the embodiment of the present application, in combination with fig. 28 and 29, a plurality of stripe-shaped third blocking structures b are formed at intervals in the region to be cut of the initial substrate c. Referring to fig. 29, the third blocking structure b may be a hollowed-out area formed in the first inorganic material film 1051, the dummy trace 108, and the second inorganic material film 1052. The hollowed-out area b may be used to expose the second blocking layer 110.

By forming the third blocking structure b in the area to be cut, it is possible to prevent the crack around the test interface 103 from extending to the area to be cut when the subsequent cutting is performed along the area to be cut, and to ensure the cutting effect.

Alternatively, fig. 28 and 29 illustrate an example in which the first blocking structure 104 in the display panel 10 includes the first filling portion 1061 of the organic material film layer 106 and the third filling portion 1102 in the second blocking layer 110. Of course, in the preparation of any of the display panels 10 provided in the embodiments of the present application, a plurality of strip-shaped third blocking structures b may be formed in the to-be-cut area of the initial substrate. The embodiments of the present application are not described herein.

Step 305, cutting the initial substrate along the area to be cut.

In the embodiment of the present application, after forming the plurality of third blocking structures b in the region to be cut, the initial substrate may be cut along the region to be cut. When the initial substrate c is cut along the area to be cut, other film layers formed on the initial substrate c can be cut off together, so that the display panel is obtained.

For example, referring to fig. 29, the initial substrate c, the second blocking layer 110, the inorganic material layer 105, and the dummy trace 108 may be cut along the region to be cut.

It should be noted that, the sequence of the steps of the preparation method of the display panel provided by the embodiment of the application can be properly adjusted, and the steps can be correspondingly increased or decreased according to the situation. For example, step 303 may be performed before step 302 and step 304 may be deleted as appropriate. Any method that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered in the protection scope of the present application, and thus will not be repeated.

Fig. 30 is a schematic structural diagram of a display device according to an embodiment of the present application. As can be seen with reference to fig. 30, the display device may include a power supply assembly 40 and a display panel 10 as provided in the above-described embodiments. The power supply assembly 40 may be used to power the display panel 10. The display device may be a folding display device.

Optionally, the display device may be any product or component with a display function and a fingerprint recognition function, such as an organic light-emitting diode (OLED) display panel, electronic paper, mobile phone, tablet computer, television, display, notebook computer, digital photo frame, or navigator.

The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but rather, the application is to be construed as limited to the appended claims.

Claims

1. A display panel, the display panel comprising:

a substrate (101), wherein the substrate (101) has a display region (101 a) and a peripheral region (101 b) located on one side of the display region (101 a);

a plurality of sub-pixels (102), the plurality of sub-pixels (102) being located in a display area (101 a);

a plurality of test interfaces (103), the plurality of test interfaces (103) being located in the peripheral region (101 b), the plurality of test interfaces (103) being electrically connected to the plurality of sub-pixels (102);

And a plurality of strip-shaped first blocking structures (104) arranged at intervals, wherein a plurality of the first blocking structures (104) are positioned in the peripheral area (101 b), and a plurality of the first blocking structures (104) are positioned between the plurality of test interfaces (103) and the plurality of sub-pixels (102), and the extending direction of each first blocking structure (104) is intersected with a target direction (X), and the target direction (X) is the arrangement direction of the peripheral area (101 b) and the display area (101 a);

the substrate (101) is provided with a plurality of strip-shaped first hollowed-out areas which are arranged at intervals, and each first blocking structure (104) at least comprises one first hollowed-out area;

The display panel further comprises an inorganic material film layer (105) and an organic material film layer (106) on the substrate base plate (101);

The orthographic projection of the inorganic material film layer (105) on the substrate (101) is not overlapped with the first blocking structures (104) and the intervals among the first blocking structures (104), and the orthographic projection of the organic material film layer (106) on the substrate (101) is not overlapped with the first blocking structures (104) and the intervals among the first blocking structures (104).

2. The display panel according to claim 1, further comprising an inorganic material film layer (105) and an organic material film layer (106) on the substrate base plate (101);

The inorganic material film layer (105) is provided with a second hollowed-out area, and the organic material film layer (106) is provided with a third hollowed-out area; each first blocking structure (104) further comprises a second hollow-out area and a third hollow-out area, wherein each first blocking structure (104) comprises the first hollow-out area, and the second hollow-out area and the third hollow-out area are communicated.

3. The display panel according to claim 2, characterized in that the display panel further comprises a plurality of connection tracks (107); one end of each connecting wire (107) is connected with one side of one test interface (103) close to the display area (101 a), and the other end is connected with the plurality of sub-pixels (102);

The orthographic projection of each connecting wire (107) on the substrate base plate (101) is not overlapped with the plurality of first blocking structures (104), and the orthographic projection of each connecting wire (107) on the substrate base plate (101) is overlapped with the orthographic projection of the organic material film layer (106) on the substrate base plate (101).

4. A display panel according to claim 3, characterized in that the thickness of the portion of the film layer of inorganic material (105) on the substrate (101) where the orthographic projection is located at the target area is smaller than the thickness of the portion of the film layer of inorganic material (105) on the substrate (101) where the orthographic projection is located at other areas than the target area;

wherein the target area covers an orthographic projection of the spacing between the plurality of first blocking structures (104) onto the substrate base plate (101).

5. The display panel according to claim 1, further comprising an inorganic material film layer (105) and an organic material film layer (106) on the substrate base plate (101);

The inorganic material film layer (105) is provided with a plurality of strip-shaped fourth hollowed-out areas which are arranged at intervals, the extending direction of the fourth hollowed-out areas is intersected with the target direction (X), the organic material film layer (106) comprises a first main body part (1061), and a plurality of first filling parts (1062) positioned in the fourth hollowed-out areas; a plurality of said first blocking structures (104) comprises at least: a plurality of the first filling portions (1062).

6. The display panel according to claim 5, wherein the inorganic material film layer (105) includes: a first inorganic material sub-film layer (1051) and a second inorganic material sub-film layer (1052) that are sequentially laminated in a direction away from the base substrate (101); the display panel further comprises a plurality of connection traces (107) and a first blocking layer (109) between the first inorganic material sub-film layer (1051) and the second inorganic material sub-film layer (1052); one end of each connecting wire (107) is connected with one side of one test interface (103) far away from the display area (101 a), and the other end is connected with the plurality of sub-pixels (102);

Each fourth hollowed-out area comprises a first sub-hollowed-out area positioned in the first inorganic material sub-film layer (1051) and a second sub-hollowed-out area positioned in the second inorganic material sub-film layer (1052), and the first filling part (1062) is positioned in the second sub-hollowed-out area; the first blocking layer (109) comprises a second body portion (1091) and a second filling portion (1092) located in the first sub-hollowed-out region; the plurality of first blocking structures (104) further comprises: a plurality of second filling portions (1092).

7. The display panel of claim 6, further comprising: a second blocking layer (110) located between the substrate base plate (101) and the first inorganic material sub-film layer (1051);

The substrate (101) is provided with a plurality of strip-shaped fifth hollowed-out areas which are arranged at intervals, the extending direction of the fifth hollowed-out areas is intersected with the target direction (X), the second blocking layer (110) comprises a third main body part (1101), and a plurality of third filling parts (1102) positioned in the plurality of fifth hollowed-out areas; the plurality of first blocking structures (104) further comprises: a plurality of third filling portions (1102).

8. The display panel according to any one of claims 1 to 7, further comprising: -a second blocking structure (111) in the form of a strip;

The second blocking structure (111) is located in the peripheral area (101 b), the second blocking structure (111) is located at one side of the plurality of test interfaces (103) along the target direction (X), the extending direction of the second blocking structure (111) is parallel to the target direction (X), and the second blocking structure (111) is connected with the first blocking structure (104).

9. A method of manufacturing the display panel according to any one of claims 1 to 8, comprising:

10. The method of claim 9, wherein the acquiring a substrate base plate comprises:

11. A display device, characterized in that the display device comprises: a power supply assembly and a display panel according to any one of claims 1 to 8;

the power supply assembly is used for supplying power to the display panel.