CN113690284A

CN113690284A - Display panel, preparation method thereof and display device

Info

Publication number: CN113690284A
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: 2021-11-23
Anticipated expiration: 2041-08-23
Also published as: CN113690284B; CN118434238A

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, a plurality of test interfaces, a plurality of sub-pixels and a plurality of first blocking structures located between the plurality of test interfaces and the plurality of sub-pixels. The plurality of first blocking structures can block the cracks around the plurality of test interfaces from extending to the display area where the plurality of sub-pixels are located, and 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 of the display panel and a display device.

Background

Before the display panel leaves a 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 normally display.

In the related art, the display panel includes a substrate base, a plurality of sub-pixels located in a display area of the substrate base, and a test interface located in a peripheral area of the substrate base. 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 test of the display performance of the plurality of sub-pixels is realized.

However, the periphery of the test interface in the related art often has cracks, and the cracks may extend to the display area, 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 art. The technical scheme is as follows:

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

the display device comprises a substrate base plate, a display panel and a display panel, wherein the substrate base plate is provided with a display area and a peripheral area positioned on one side of the display area;

a plurality of sub-pixels located in a display area;

a plurality of test interfaces located in the peripheral region, the plurality of test interfaces being electrically connected to the plurality of sub-pixels;

and a plurality of strip-shaped first blocking structures arranged at intervals, wherein the plurality of first blocking structures are positioned in the peripheral area, the 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 the 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-out areas arranged at intervals, and each first blocking structure at least includes one first hollow-out 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 base plate is not overlapped with the intervals among the plurality of first blocking structures, and the orthographic projection of the organic material film layer on the substrate base plate is not overlapped with the intervals among the plurality of first blocking structures and the plurality of first blocking structures.

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

Optionally, the display panel further includes a plurality of connection traces; 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 base plate is not overlapped with the plurality of first blocking structures, and the orthographic projection of each connecting wire on the substrate base plate is overlapped with the orthographic projection of the organic material film layer on the substrate base plate.

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

wherein the target area covers an orthographic projection of a space between the first blocking structures on the substrate base plate.

the inorganic material film layer is provided with a plurality of strip-shaped fourth hollow areas which are arranged at intervals, the extending direction of the fourth hollow 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 hollow areas; a plurality of the first blocking structures includes at least: a plurality of the first filling parts.

Optionally, the inorganic material film layer includes: the first inorganic material sub-film layer and the second inorganic material sub-film layer are sequentially stacked along the direction far away from the substrate base plate; the display panel further comprises a plurality of connection traces and a first blocking layer 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 far away from the display area, and the other end of each connecting wire is connected with the plurality of sub-pixels;

each fourth hollow-out region comprises a first sub hollow-out region positioned in the first inorganic material sub-film layer and a second sub hollow-out region positioned in the second inorganic material sub-film layer, and the first filling part is positioned in the second sub hollow-out region; the first blocking layer comprises a second main body part and a second filling part positioned in the first sub-hollow area; the plurality of first blocking structures further comprises: a plurality of the 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 hollow areas which are arranged at intervals, the extending direction of the fifth hollow 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 fifth hollow areas; the plurality of first blocking structures further comprises: a plurality of the third filling parts.

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

the second blocking structure is located in the peripheral area, the second blocking structure is located on 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:

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

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

and forming a plurality of strip-shaped first blocking structures which are arranged at intervals, wherein the 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 the target direction, and the target direction is the arrangement direction of the peripheral area and the display area.

Optionally, the obtaining the substrate base plate includes:

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

forming a plurality of strip-shaped third blocking structures which are arranged at intervals in the area 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 beneficial effect that technical scheme that this application provided brought includes at least:

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

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

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

fig. 2 is a top view of a substrate provided in an embodiment of the present application;

FIG. 3 is a partial schematic view of a display panel according to an embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of the display panel shown in FIG. 3 along direction BB;

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

FIG. 6 is a cross-sectional view of the display panel shown in FIG. 5 along direction CC;

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

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

FIG. 9 is a schematic diagram of a portion of another display panel provided in an embodiment of the present application;

fig. 10 is a cross-sectional view of the display panel shown in fig. 9 in 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 partial schematic view of a substrate and an inorganic material film layer provided by an embodiment of the present application;

fig. 13 is a partial schematic view of another display panel provided in an embodiment of the present application;

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

fig. 15 is a cross-sectional view of a display panel provided in 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;

fig. 18 is a cross-sectional view of another display panel provided in 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 removed 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;

fig. 22 is a partial schematic view of another display panel provided in an embodiment of the present application;

FIG. 23 is a cross-sectional view of the display panel shown in FIG. 22 taken along the GG direction;

fig. 24 is a cross-sectional view of still another display panel provided in an embodiment of the present application;

fig. 25 is a schematic structural diagram of another display panel provided in this 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 disclosure;

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

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

fig. 29 is a 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

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Before the display panel is shipped, the display performance of a plurality of sub-pixels in the display panel needs to be tested, which is generally called an Exploratory (ET) lighting test, so as to ensure the yield of the display panel after being shipped.

The substrate base plate 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 the plurality of sub-pixels, and the test of the display performance of the sub-pixels is realized. In general, after the ET lighting test is completed, the plurality of test interfaces provided on the substrate may be cut off by a cutting process, and the display panel that is finally shipped may not include the test interfaces.

However, after the ET lighting test is completed, the plurality of test interfaces provided on the substrate needs to be cut off by a cutting process, so that the distances between the plurality of test interfaces and the plurality of sub-pixels are usually large, and the connection traces between the plurality of test interfaces and the plurality of sub-pixels are easily burned during the ET lighting test.

Therefore, in order to avoid the burn problem 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, the test interfaces arranged on the substrate are not cut off through a cutting process, and the display panel which is finally delivered from a factory can include the test interfaces. However, the periphery of the test interface usually has cracks (crack), and the cracks may extend to the display area to affect 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 pixel structure 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 provided in an embodiment of the present application. Referring to fig. 2, the base substrate 101 may have a display region 101a and a peripheral region 101b at one side of the display region 101 a. As can be seen from fig. 1 and fig. 2, the plurality of sub-pixels 102 are located in the display region 101a, the plurality of test interfaces 103 are located in the peripheral region 101b, and the plurality of test interfaces 103 can be electrically connected to the plurality of sub-pixels 102 (the connection relationship is not shown in fig. 1). The plurality of test interfaces 103 may be used to provide test signals to the plurality of sub-pixels 102 to test the display performance of the plurality of sub-pixels 102.

Alternatively, the display area 101a may be referred to as an Active Area (AA) or an AA area. Wherein, the plurality of sub-pixels 102 located in the display area 101a can be used to represent: an area where orthogonal projections of the plurality of sub-pixels 102 on the substrate base 101 are located may be a display area 101 a.

Referring to fig. 1, 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 101 b. The plurality of first blocking structures 104 may be located between the plurality of test interfaces 103 and the plurality of sub-pixels 102. Also, the extending direction Y of each first blocking structure 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 configured to block an extending path of a crack around the plurality of test interfaces 103, so as to prevent the crack around the plurality of test interfaces 103 from extending to the display area 101a, and ensure a display effect of the display panel 10.

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

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 present 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 located between the plurality of test interfaces and the plurality of sub-pixels. The plurality of first blocking structures can block the cracks around the plurality of test interfaces from extending to the display area where the plurality of sub-pixels are located, and 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 and drain layers of the sub-pixels 102 in the display panel 10. That is, the test interface 104 may be made of the same material and manufactured by the same patterning process as the source/drain layer of the sub-pixel 102.

Fig. 3 is a partial schematic view of a display panel according to an embodiment of the present disclosure. Fig. 4 is a cross-sectional view of the display panel shown in fig. 3 along the BB direction. As can be seen from fig. 3 and 4, the substrate base plate 101 may have a plurality of first hollow-out regions a1 in the shape of strips arranged at intervals, and the first hollow-out regions a1 may penetrate through the substrate base plate 101.

In this case, each of the first blocking structures 104 may include a first hollowed-out area a 1. Therefore, when the cracks around the plurality of test interfaces 103 extend to the boundary of the first hollow-out region a1 (the first blocking structure 104), the cracks can be blocked by the first hollow-out region a1, so as to prevent the cracks from extending to the display region 101a, thereby ensuring the display effect of the display panel 10. In addition, the portion of the base substrate 101 where the first hollow-out region a1 is provided has good bending performance, and can prevent the display panel 10 from generating bending cracks during bending.

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

Fig. 5 is a partial schematic view of another display panel provided in an embodiment of the present application. Fig. 6 is a sectional view of the display panel shown in fig. 5 along a direction CC. As can be seen from fig. 5 and 6, the display panel 10 may further include an inorganic material film layer 105 and an organic material film layer 106 on the substrate base plate 101. The orthographic projection of the plurality of test interfaces 103 on the substrate base plate 101 overlaps with the orthographic projection of the inorganic material film layer 105105 on the substrate base plate 101, and does not overlap with the orthographic projection of the organic material film layer 106 on the substrate base plate 101. Alternatively, the organic material layer 106 may be a Planarization Layer (PLN).

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

Optionally, the forming method of the first blocking structure 104 may include: coating 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 regions which are not protected by the photoresist in the organic material film layer 106, the inorganic material film layer 105 and the substrate base plate 101; 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 regions of the organic material film layer 106 and the inorganic material film layer 105 which are not protected by the photoresist; and removing the photoresist. In the second etching, only the organic material film 106 and the inorganic material film 105 may be etched without etching the substrate 101. The etching depth can be controlled by the etching duration.

In this case, each of the first blocking structures 104 may include a first hollowed-out area a 1. Therefore, when the cracks around the plurality of test interfaces 103 extend to the boundary of the first hollow-out region a1 (the first blocking structure), the cracks can be blocked by the first hollow-out region a1, so that the cracks are prevented from extending to the display region 101a, and the display effect of the display panel 10 is ensured. In addition, the portion of the base substrate 101 where the first hollow-out region a1 is provided has good bending performance, and can prevent the display panel 10 from generating bending cracks during bending.

Fig. 7 is a partial schematic view of another display panel provided in an embodiment of the present application. Fig. 8 is a cross-sectional view of the display panel shown in fig. 7 along direction DD. Referring to fig. 7 and 8, the inorganic material film 105 may have a second hollowed-out area a2, and the organic material film 106 may have a third hollowed-out area a 3.

In this case, each of the first blocking structures 104 may further include a second hollow-out region a2 and a third hollow-out region a3 in addition to a first hollow-out region a1 of the substrate base plate 101. Each of the first blocking structures 104 includes a first hollow-out area a1, a second hollow-out area a2, and a third hollow-out area a 3. Therefore, when the cracks around the plurality of test interfaces 103 extend to the boundary of the first hollow-out region a1, the second hollow-out region a2 or the third hollow-out region a3, the cracks can be blocked by the first hollow-out region a1, the second hollow-out region a2 or the third hollow-out region a3, so that the cracks are prevented from extending to the display region 101a, and the display effect of the display panel 10 is ensured. In addition, the bending performance of the portions of the first hollow-out region a1, the second hollow-out region a2 and the third hollow-out region a3 of the display panel 10 is good, so that the display panel 10 can be prevented from generating bending cracks during bending.

Optionally, the forming method of the first blocking structure 104 may include: coating 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 regions which are not protected by the photoresist in the organic material film layer 106, the inorganic material film layer 105 and the substrate base plate 101; and removing the photoresist.

Therefore, the first hollow-out region a1, the second hollow-out region a2 and the third hollow-out region a3 in each first blocking structure 104 can be obtained by one etching. The first hollow-out region a1 may penetrate through the substrate 101, the second hollow-out region a2 may penetrate through the inorganic material film 105, and the third hollow-out region 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, where 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 to the display area 101a through the peripheral area 101b, and connected to the plurality of sub-pixels 102 in the display area 101 a.

Fig. 9 is a partial schematic view of another display panel provided in an embodiment of the present application. Fig. 10 is a sectional view of the display panel shown in fig. 9 along EE direction. With reference to fig. 9 and 10, one end of each connection trace 107 in the plurality of connection traces 107 in the display panel 10 may be connected to one side of one test interface 103 close to 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 being routed from the peripheral region 101b to the display region 101 a.

Referring to fig. 9 and 10, the display panel 10 may further include a dummy trace 108 located at the same layer as the plurality of connection traces 107. The dummy trace 108 does not play a role of transmitting signals. The dummy trace 108 and the connection trace 107 are located on the same layer, which means that the dummy trace 108 and the connection trace 107 are made of the same material and manufactured by the same patterning process. For example, the material of the dummy trace 108 and the connection trace 107 may be metal, and the dummy trace 108 and the connection trace 107 may be fabricated at the same layer as the gate (gate) layer of the sub-pixel 102 in the display panel 10.

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

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

Optionally, the forming method of the first blocking structure 104 may include: coating 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 regions which are not protected by the photoresist in the organic material film layer 106, the inorganic material film layer 105 and the substrate base plate 101; and removing the photoresist.

The forming method of the first blocking structure 104 in fig. 10 is the same as the forming method of the first blocking structure 104 in fig. 8, except that the mask used 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 along the extending direction thereof in fig. 10 is smaller than the length of the first blocking structure 104 along 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, a thickness d1 of a portion of the inorganic material film layer 105 on the base substrate 101 where an orthographic projection thereof is located in the target area is smaller than a thickness d2 of a portion of the inorganic material film layer 105 on the base substrate 101 where the orthographic projection thereof is located in an area other than the target area. Wherein the target area covers an orthographic projection of the spaces between the plurality of first blocking structures 104 on the substrate base plate 101.

The inorganic material film layer 105 more easily causes 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 located in the target region in the orthographic projection on the substrate base plate 101 small, it is possible to avoid the crack from extending to the display region 101a through the inorganic material film layer 105 in the space between the plurality of first blocking structures 104, and ensure the display effect of the display panel 10.

Alternatively, the orthographic projection of the target area on the substrate base plate 101 covering the spaces between the plurality of first blocking structures 104 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 of the plurality of first blocking structures 104 having the largest distance along the target direction X. Moreover, the length of the projection of the target area along the direction perpendicular to the extending direction of the first blocking structures 104 is greater than or equal to the distance between two first blocking structures 104 of the plurality of first blocking structures 104 with the largest distance along the extending direction.

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

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

In this case, the plurality of first blocking structures 104 may include at least a plurality of first filling parts 1062. For example, a first blocking structure 104 includes a first filling portion 1062. Therefore, when the cracks around the plurality of test interfaces 103 extend to the boundary of the first filling part 1062, the cracks can be blocked by the first filling part 1062, thereby preventing the cracks from extending to the display area 101a and ensuring the display effect of the display panel 10. In addition, the display panel 10 has a good bending performance in the first filling part 1062, and can prevent the display panel 10 from generating bending cracks during bending.

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 area, which is not protected by the photoresist, in the inorganic material film layer 105 to obtain a plurality of fourth hollowed-out areas a 4; removing the photoresist; the organic material film 106 is formed on the side of the inorganic material film 105 away from the substrate base plate 101, so that the organic material film 106 can be filled into the fourth hollowed-out area a 4. The first filling part 1062 filled in the fourth hollowed-out area a4 is the first blocking structure 104.

Fig. 15 is a cross-sectional view of a display panel provided in an embodiment of the present application. Fig. 16 is a plan 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. With reference 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 sequentially stacked in a direction away from the substrate base plate 101. The display panel 10 further includes 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.

Optionally, 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 manufactured by the same manufacturing process. For example, the material of the connection trace 107 and the first blocking layer 109 is metal, and both the connection trace 107 and the first blocking layer 109 can be fabricated in the same layer as the gate layer of the sub-pixel 102 of the display panel 10.

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

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

In this case, the plurality of first blocking structures 104 may include: a plurality of first filling parts 1062 and a plurality of second filling parts 1092. Referring to fig. 15, the plurality of first filling parts 1062 and the plurality of second filling parts 1092 are alternately arranged in the target direction X. Of course, the plurality of first filling parts 1062 and the plurality of second filling parts 1092 need not be arranged in a staggered manner in the target direction X. For example, two second filling parts 1092 adjacent in the target direction X may have no first filling part 1062 therebetween, or two or more first filling parts 1062. The embodiment of the present application does not limit this.

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 area, which is not protected by the photoresist, in the first inorganic material sub-film layer 1051 to obtain a first sub-hollow area; 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 base plate 101, so that the first blocking layer 109 can be filled into the first sub-hollow area; forming a second inorganic material sub-film layer 1052 on the side of the first blocking layer 109 away from the substrate 101; coating a 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-hollow area; removing the photoresist; the organic material film 106 is formed on the side of the second inorganic material sub-film 1052 away from the substrate 101, so that the organic material film 106 can be filled into the second sub-hollow-out region. The second filling portion 1092 filled into the first sub-hollow area and the first filling portion 1062 filled into the second sub-hollow area are the first blocking structure 104.

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

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

Referring to fig. 18, the plurality of first blocking structures 104 may be a stepped structure, which can effectively prevent cracks around the plurality of test interfaces 103 from extending to the display area 101a, and the effect of the first blocking structures 104 blocking crack extension is better.

Fig. 22 is a partial schematic view of another display panel provided in an embodiment of the present application. Fig. 23 is a sectional view of the display panel shown in fig. 22 taken along the GG direction. As can be seen with reference to fig. 22 and 23, the display panel 10 may further include: and a second blocking structure 111 having a bar shape. The second blocking structure 111 is located in the peripheral region 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 two 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 the first filling part 1062. Accordingly, the inorganic material film 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 area.

By arranging the second blocking structure 111 on one side of the plurality of test interfaces 103 along the target direction X, cracks around the test interfaces 103 can be further prevented from extending from one side of the test interfaces 103 along the target direction X, and the yield of the display panel is ensured.

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

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

Fig. 25 is a schematic structural diagram of another display panel provided in the embodiment of the present application. As can be seen with reference to fig. 25, the display panel 10 may further include a bonding interface 112, and the bonding interface 112 may be located on a side of the test interface 103 near an edge of the substrate base 101. Further, since the size of the bonding interface 112 is smaller than the size of the test interface 103, the possibility of cracks occurring around the bonding interface 112 is smaller than the possibility of cracks occurring around the test interface 103.

Alternatively, the display panel 10 may be a folding display panel. The folding line of the folding display panel 10 may be a middle line M shown in fig. 25. Because the display panel of the embodiment of the present application is provided with the first blocking structure 104 with better bending performance, when the foldable display panel 10 is bent along the folding line M, the foldable 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.

The base 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 invention, 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 can 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 sub-pixels 102 to test the display performance of the plurality of sub-pixels 102.

And 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 101 b. The plurality of first blocking structures 104 may be located between the plurality of test interfaces 103 and the plurality of sub-pixels 102. Also, the extending direction Y of each first blocking structure 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.

Moreover, since the extending direction Y of the first blocking structure 104 intersects with the target direction X (the arrangement direction of the peripheral region 101b and the display region 101a), it is also possible to prevent the cracks around the plurality of test interfaces 103 from extending to the display region 101a along the first blocking structure 104 or the intervals between the plurality of first blocking structures 104, and the effect of the first blocking structure 104 blocking the crack extension can be effectively ensured.

In summary, the embodiment of the present 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 located between the plurality of test interfaces and the plurality of sub-pixels. The plurality of first blocking structures can block the cracks around the plurality of test interfaces from extending to the display area where the plurality of sub-pixels are located, and 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 disclosure. The method can be used for preparing the display panel provided by the embodiment. Referring to fig. 27, the method may include:

step 301, an initial substrate is provided.

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

The region to be cut can be used for cutting the initial substrate along the region to be cut after other film layers are formed subsequently.

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 arranged at intervals.

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

In the embodiment of the present application, in conjunction with fig. 28 and 29, a plurality of strip-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 hollow area formed in the first inorganic material film layer 1051, the dummy trace 108, and the second inorganic material film layer 1052. The hollowed-out region b may be used to expose the second blocking layer 110.

By forming the third blocking structure b in the region to be cut, it is possible to prevent the cracks around the test interface 103 from extending to the region to be cut when subsequently cutting along the region to be cut, thereby ensuring the cutting effect.

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

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

In the embodiment of the present application, after the plurality of third blocking structures b are formed at 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 region to be cut, other film layers formed on the initial substrate c can be cut off together to obtain the display panel.

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 order of the steps of the method for manufacturing a display panel provided in the embodiment of the present application may be appropriately adjusted, and the steps may also be 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 a person skilled in the art within the technical scope disclosed in the present application is covered by the protection scope of the present application, and thus the detailed description thereof is omitted.

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 apparatus may include a power supply assembly 40 and the display panel 10 provided as the above embodiment. The power supply assembly 40 may be used to supply power to the display panel 10. Wherein the display device may be a folding display device.

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

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A display panel, comprising:

a base substrate (101), the base substrate (101) having a display region (101a) and a peripheral region (101b) located on the display region (101a) side;

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 (101b), 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 the plurality of first blocking structures (104) are positioned in the peripheral area (101b), the plurality of first blocking structures (104) are positioned between the plurality of test interfaces (103) and the plurality of sub-pixels (102), 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 (101b) and the display area (101 a).

2. The display panel according to claim 1, wherein the substrate base plate (101) has a plurality of strip-shaped first hollow-out regions arranged at intervals, and each of the first blocking structures (104) comprises at least one first hollow-out region.

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

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

4. The display panel according to claim 2, 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 hollow-out area, and the organic material film layer (106) is provided with a third hollow-out area; each of the first blocking structures (104) further includes one of the second hollow-out areas and one of the third hollow-out areas, wherein each of the first blocking structures (104) includes the first hollow-out area, and the second hollow-out area and the third hollow-out area are communicated.

5. The display panel of claim 4, wherein 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 (101a), and the other end of each connecting wire is connected with the plurality of sub-pixels (102);

the orthographic projection of each connecting trace (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 trace (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).

6. The display panel according to claim 5, wherein the thickness of a portion of the orthographic projection of the inorganic material film layer (105) on the substrate base plate (101) in a target area is smaller than the thickness of a portion of the orthographic projection of the inorganic material film layer (105) on the substrate base plate (101) in an area other than the target area;

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

7. 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 hollow areas which are arranged at intervals, the extending direction of the fourth hollow areas is intersected with the target direction (X), and the organic material film layer (106) comprises a first main body part (1061) and a plurality of first filling parts (1062) which are positioned in the fourth hollow areas; a plurality of said first blocking structures (104) comprises at least: a plurality of the first filling parts (1062).

8. The display panel according to claim 7, wherein the inorganic material film layer (105) comprises: a first inorganic material sub-film layer (1051) and a second inorganic material sub-film layer (1052) which are sequentially laminated in a direction away from the substrate base plate (101); the display panel further comprises a plurality of connection traces (107) and a first blocking layer (109) between the first and second inorganic material sub-film layers (1051, 1052); one end of each connecting wire (107) is connected with one side of one test interface (103) far away from the display area (101a), and the other end of each connecting wire is connected with the plurality of sub-pixels (102);

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

9. The display panel according to claim 8, characterized in that the display panel further comprises: a second blocking layer (110) located between the substrate base plate (101) and the first inorganic material sub-film layer (1051);

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

10. The display panel according to any one of claims 1 to 9, characterized by further comprising: a second blocking structure (111) in the form of a strip;

the second blocking structure (111) is located in the peripheral region (101b), the second blocking structure (111) is located on one side of the plurality of test interfaces (103) along the target direction (X), an 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).

11. A method for manufacturing a display panel, the method comprising:

12. The method of claim 11, wherein the obtaining a substrate base plate comprises:

13. A display device, characterized in that the display device comprises: a power supply assembly and a display panel as claimed in any one of claims 1 to 10;

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