CN113594206A

CN113594206A - Flexible display panel and preparation method thereof

Info

Publication number: CN113594206A
Application number: CN202010370987.1A
Authority: CN
Inventors: 李灵芝; 陈龙; 张玉佩
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd; Royole Corp
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-11-02

Abstract

The application provides a flexible display panel capable of improving the connection strength between an elastic connection structure and an island-shaped structure and a preparation method thereof. The application provides a flexible display panel, includes: a substrate; the island-shaped structures are arranged on the substrate and are arranged in an array, net-shaped gaps are formed among the island-shaped structures, and a hollow part communicated with the net-shaped gaps is arranged on at least one island-shaped structure; and the elastic connecting structure is arranged on the substrate, is positioned in the reticular gaps and the hollow parts and is connected with at least two adjacent island-shaped structures through the hollow parts and the reticular gaps, and the elastic modulus of the elastic connecting structure is smaller than that of the island-shaped structures.

Description

Flexible display panel and preparation method thereof

Technical Field

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

Background

At present, flexible display panels (including stretchable display panels, etc.) often adopt island-shaped structures arranged in an array and elastic connection structures connected between the island-shaped structures, where the elastic connection structures are used to provide stretchable space for the flexible display panels, and the island-shaped structures are used to protect pixel units of the flexible display panels from being damaged by stretching during the stretching process. In the actual stretching process of the flexible display panel, the connection strength between the elastic connection structure and the island-shaped structure has a great influence on the reliability of the flexible display panel, and therefore, how to improve the connection strength between the elastic connection structure and the island-shaped structure in the flexible display panel becomes one of the problems to be solved urgently.

Disclosure of Invention

The application provides a flexible display panel capable of improving the connection strength between an elastic connection structure and an island-shaped structure and a preparation method thereof.

In a first aspect, the present application provides a flexible display panel comprising:

a substrate;

the island-shaped structures are arranged on the substrate and are arranged in an array, net-shaped gaps are formed among the island-shaped structures, and a hollow part communicated with the net-shaped gaps is arranged on at least one island-shaped structure; and

locate elastic connection structure on the base plate, elastic connection structure is located netted space reaches in the fretwork portion, and through the fretwork portion with netted space connects at least two adjacent island structures, just elastic connection structure's elastic modulus is less than island structure's elastic modulus.

In a second aspect, the present application also provides a method for manufacturing a flexible display panel, including:

forming a plurality of island-shaped structures which are arranged in an array manner on a substrate and arranging net-shaped gaps among the island-shaped structures, wherein at least one island-shaped structure is provided with a hollow part communicated with the net-shaped gaps;

and forming an elastic connecting structure for connecting at least two adjacent island-shaped structures in the net-shaped gap, and filling part of the elastic connecting structure in the hollow part, wherein the elastic modulus of the elastic connecting structure is smaller than that of the island-shaped structures.

According to the flexible display panel and the preparation method of the flexible display panel, the hollow parts are arranged on the island-shaped structures, the elastic connecting structures are designed to be connected with the island-shaped structures through the hollow parts of the island-shaped structures, so that the elastic connecting structures and the island-shaped structures form a mutually-meshed connecting mechanism, the connecting area of the elastic connecting structures and the island-shaped structures is increased, the connecting strength between the elastic connecting structures and the island-shaped structures is improved, and the reliability of the flexible display panel is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described 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 flexible display panel provided in an embodiment of the present application;

fig. 2 is a top view of the substrate, the island structures and the elastic connection structures in the flexible display panel provided in fig. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of a first elastomeric joint structure provided in FIG. 2;

FIG. 5 is a schematic view of a second elastomeric joint structure provided in FIG. 2;

FIG. 6 is a schematic view of a third elastomeric joint structure provided in FIG. 2;

FIG. 7 is a schematic structural view of a fourth elastic attachment structure provided in FIG. 2;

FIG. 8 is a schematic structural view of a fifth elastic attachment arrangement provided in FIG. 2;

FIG. 9 is a schematic view of a sixth elastomeric joint structure provided in FIG. 2;

FIG. 10 is a schematic view of a seventh elastomeric joint structure provided in FIG. 2;

FIG. 11 is a schematic view of an eighth type of elastomeric joint structure provided in FIG. 2;

FIG. 12 is a cross-sectional view of the flexible display panel provided in FIG. 1;

fig. 13 is a flowchart of a method for manufacturing a flexible display panel according to an embodiment of the present disclosure;

fig. 14 is a schematic structural diagram of disposing a screen on a substrate according to an embodiment of the present application;

fig. 15 is a schematic structural view of the first screen provided in fig. 14;

fig. 16 is a schematic view of the structure of the second screen provided in fig. 14;

fig. 17 is a schematic view of the structure of the third screen provided in fig. 14;

fig. 18 is a schematic view of the structure of the fourth screen provided in fig. 14.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be noted that the embodiments provided in the present application may be combined with each other.

The application provides a flexible display panel is a display device with at least one of three performances of stretching, bending and bending. Referring to fig. 1, the stretchable flexible display panel 100 is taken as an example for description in the present embodiment, and details are not described later.

During the stretching of the flexible display panel 100, the flexible display panel may still display images. The flexible display panel has higher flexibility than a non-flexible display device. Therefore, the shape of the flexible display panel can be freely changed according to the user's manipulation. For example, when a user holds and pulls one end of the flexible display panel, the flexible display panel may be stretched by the force of the user. Alternatively, when a user places the flexible display panel on an uneven wall, the flexible display panel may be configured to be curved in the shape of the surface of the wall. When the force applied by the user is removed, the flexible display panel may return to its original shape; alternatively, the user applies a force to cause the flexible display panel to resume its shape.

The flexible display panel 100 provided in the present application is described in detail below with reference to the accompanying drawings.

Referring to fig. 2, a flexible display panel 100 according to an embodiment of the present disclosure includes a substrate 10, a plurality of island structures 20, and an elastic connection structure 30.

The substrate 10 is a substrate of the flexible display panel 100. The substrate 10 has flexibility. The material of the substrate 10 includes, but is not limited to, at least one of silicone rubber such as Polydimethylsiloxane (PDMS) or elastomer such as Polyurethane (PU). The substrate 10 may have a single-layer structure or a multi-layer composite structure.

For convenience of description, the length direction of the substrate 10 (also the length direction of the flexible display panel 100) is defined as the X-axis direction; defining the width direction of the substrate 10 (also the width direction of the flexible display panel 100) as the Y-axis direction; the thickness direction of the substrate 10 (also the thickness direction of the flexible display panel 100) is defined as the Z-axis direction.

Referring to fig. 2, the flexible display panel 100 includes a plurality of island structures 20 arranged in sequence along a row direction X and a plurality of island structures 20 arranged in sequence along a column direction Y on a substrate 10, that is, includes a plurality of island structures 20 arranged in an array. Any two adjacent island structures 20 are spaced apart from each other so that a plurality of island structures 20 partition the space on the substrate 10 into a network of voids 40. It is understood that the island-like structure 20 is a part of the flexible display panel 100, and the island-like structure 20 is a real existing structure, not a single island-like pattern.

Referring to fig. 2, at least one of the island structures 20 is provided with a hollow portion 50 communicating with the mesh gap 40. In other words, the flexible display panel 100 provided by the present application includes a case where only one island structure 20 has a hollow portion 50 communicating with the mesh-shaped void 40, a case where all the island structures 20 have a hollow portion 50 communicating with the mesh-shaped void 40, and a case where a part of the island structures 20 have a hollow portion 50 communicating with the mesh-shaped void 40, and another part of the island structures 20 do not have a hollow portion 50.

In the present embodiment, the island-shaped structures 20 are rectangular or substantially rectangular, but the present invention is not limited thereto, and in other embodiments, the island-shaped structures 20 may be triangular, substantially triangular, rhombic, substantially rhombic, pentagonal, circular, hexagonal, octagonal, and the like.

Specifically, the shape of the hollow portion 50 may be circular, long strip, bent strip, hook, etc.

Referring to fig. 2 and 3, the elastic connection structure 30 is disposed on the substrate 10. The elastic connecting structure 30 is located in the mesh-shaped space 40 and the hollow portion 50, and connects at least two adjacent island-shaped structures 20 through the hollow portion 50 and the mesh-shaped space 40. The hollow-out portion 50 connects the elastic connection structure 30 and the island-shaped structure 20 in an interlocking manner.

Every two adjacent island-shaped structures 20 are connected by at least one elastic connecting structure 30, so that the plurality of island-shaped structures 20 are connected into a whole. The shape of the elastic connection structure 30, the number of the island-like structures 20 connected by one elastic connection structure 30, and the specific position of the elastic connection structure 30 connected to the island-like structures 20 are not particularly limited.

In the present embodiment, the island-shaped structures 20 are used to protect the pixel units disposed thereon from tensile damage. The elastic connection structure 30 serves to provide a stretchable space for the flexible display panel 100. It will be appreciated that the island structures 20 have a greater modulus of elasticity than the elastic linking structures 30. For example, the island-shaped structures 20 are made of a flexible plastic material, such as Polyimide (PI), polyacrylate, or polyacetate; the elastic connection structure 30 is made of any elastic material such as rubber, elastic plastic, thermoplastic polyurethane, etc. The elastic connecting structure 30 has a good elasticity, so that the elastic connecting structure 30 can recover the deformation after being stretched.

It can be understood that, although the island-shaped structures 20 and the elastic connection structures 30 are made of different materials, the island-shaped structures 20 and the elastic connection structures 30 are in contact with each other and co-cured during the molding process, so that interface fusion occurs between the island-shaped structures 20 and the elastic connection structures 30, and thus the island-shaped structures 20 and the elastic connection structures 30 are connected to each other.

When the flexible display panel 100 is stretched, since the elastic connection structure 30 has a small elastic modulus, the elastic connection structure 30 may deform relatively greatly under the stretching force to counteract most or all of the stretching force; however, since the island-like structures 20 have a large elastic modulus, the island-like structures 20 are deformed little by a tensile force or the substrate 10 is not deformed. In other words, the active deformation of the elastic attachment structure 30 under a stretching force can effectively protect the island-like structure 20 from being damaged by the stretching force. The elastic connection structures 30 are stretched to increase the gaps between the island structures 20, but the size and shape of each island structure 20 are not changed to ensure that the pixel units and the like on the island structures 20 are not damaged, so as to ensure the display yield of the flexible display panel 100 when being stretched.

In the process that the flexible display panel 100 is stretched, if the connection between the elastic connection structure 30 and the island-shaped structure 20 is not firm, it is very likely that the elastic connection structure 30 and the island-shaped structure 20 are broken under the stretching force, and then in the subsequent stretching process, the island-shaped structure 20 cannot transmit the stretching force to the elastic connection structure 30, so that the stretching force acts on the island-shaped structure 20, and further, the pixel unit protected by the island-shaped structure 20 is damaged by stretching.

The flexible display panel 100 provided by the embodiment of the application, the hollow portion 50 is disposed on the island-shaped structure 20, and the elastic connection structure 30 is designed to connect the island-shaped structure 20 through the hollow portion 50 of the island-shaped structure 20, so that the elastic connection structure 30 and the island-shaped structure 20 form an interlocking connection mechanism, and the connection area between the elastic connection structure 30 and the island-shaped structure 20 is also increased, thereby improving the connection strength between the elastic connection structure 30 and the island-shaped structure 20, and increasing the reliability of the flexible display panel 100 during stretching.

In this embodiment, each of the island structures 20 is provided with at least one hollow portion 50. When the island-shaped structure 20 is polygonal, at least one hollow-out portion 50 can be disposed on each side of the island-shaped structure 20. The island-shaped structure 20 is rectangular, and three hollow portions 50 are provided on each side of the island-shaped structure 20. It will be appreciated that the number of openings 50 on each side of the island 20 may be equal or unequal.

The following description of the specific shape of the elastic connection structure 30 is provided in conjunction with the accompanying drawings, and it is understood that the elastic connection structure 30 provided in the present application includes, but is not limited to, the following embodiments.

Optionally, referring to fig. 2 and fig. 3, the elastic connection structure 30 fills the mesh gap 40 and the plurality of hollow portions 50. When the elastic connection structure 30 fills up the hollow-out portion 50, a portion of the elastic connection structure 30 is embedded in the island-shaped structure 20, so that the elastic connection structures 30 are engaged with each other.

The elastic connection structure 30 fills the whole mesh gap 40 and the plurality of hollow parts 50, so that on one hand, the number of the elastic connection structures 30 in the flexible display panel 100 is large, and further, the flexible display panel 100 is more easily stretched, and the stretching deformation and the recovery deformation are more flexible; on the other hand, the connection area between the elastic connection structure 30 and the island-shaped structure 20 is increased, so that the connection force between the elastic connection structure 30 and the island-shaped structure 20 is increased, and the reliability of the flexible display panel 100 in stretching is improved.

Moreover, when the island-shaped structure 20 is provided with the hollow-out portion 50, the elastic connection structure 30 fills the whole hollow-out portion 50, so that the elastic connection structure 30 is tightly engaged with the island-shaped structure 20.

Alternatively, the elastic connection structure 30 may be a single body connected between two adjacent island structures 20. The number of the elastic connection structures 30 is plural. The plurality of elastic connection structures 30 connect all of the island-like structures 20 on the entire substrate 10.

In a first embodiment, referring to fig. 4, the elastic connection structure 30 includes a plurality of elongated connection bars 31. Adjacent ends of each connecting bar 31 connect adjacent two island structures 20, respectively. Further, one end of the connecting bar 31 is filled in the hollow portion 50 of one island-shaped structure 20, and the other end of the connecting bar 31 is filled in the hollow portion 50 of the other island-shaped structure 20. In this way, the connecting bar 31 tightly connects the adjacent two island-like structures 20. When the flexible display panel 100 is stretched, the spacing between two adjacent island structures 20 increases and the connection bar 31 is stretched.

Alternatively, the plurality of island-like structures 20 arranged in the X-axis direction may be connected by a connecting bar 31 extending in the X-axis direction, or may be connected by a connecting bar 31 inclined with respect to the X-axis direction. The plurality of island-like structures 20 arranged in the Y-axis direction may be connected by a connecting bar 31 extending in the Y-axis direction, or may be connected by a connecting bar 31 inclined with respect to the Y-axis direction.

Adjacent two island structures 20 may be connected via a plurality of connecting bars 31. The extending directions of the connecting bars 31 provided between two adjacent island-like structures 20 may be the same or different.

In a second embodiment, referring to fig. 5, the elastic connecting structure 30 includes a plurality of bending strips 32. Adjacent ends of each bending strip 32 are connected to two adjacent island structures 20, respectively. Further, one end of the bending strip 32 is filled in the hollow portion 50 of one island-shaped structure 20, and the other end of the bending strip 32 is filled in the hollow portion 50 of the other island-shaped structure 20. The bending strip 32 has a bending section in the middle to make the bending strip 32 have better stretchability and extensibility relative to the connecting strip 31, so that the flexible display panel 100 has better stretching stability after being stretched for a long time.

The arrangement of the bending strips 32 can refer to the arrangement of the connecting strips 31 in the first embodiment, and will not be described herein.

In a third embodiment, referring to fig. 6, the elastic connection structure 30 includes a plurality of arc-shaped bars 33. The adjacent two ends of each arc-shaped strip 33 are respectively connected with two adjacent island-shaped structures 20. Further, one end of the arc-shaped bar 33 is filled in the hollow portion 50 of one island-shaped structure 20, and the other end of the arc-shaped bar 33 is filled in the hollow portion 50 of the other island-shaped structure 20. The arc-shaped strips 33 are arc-shaped, so that the arc-shaped strips 33 have better stretchability and extensibility with respect to the connection strips 31, thereby enabling the flexible display panel 100 to have better stretching stability after being stretched for a long time.

The arcuate strips 33 may be semi-circular, semi-elliptical, S-shaped, etc.

It is understood that the first to third embodiments are all capable of achieving stretching of the flexible display panel 100 in multiple directions.

In a fourth embodiment, referring to fig. 7, the elastic connection structure 30 includes a plurality of center connection blocks 34. One center connection block 34 connects the plurality of island-shaped structures 20, and the center connection block 34 is located at the center surrounded by the plurality of island-shaped structures 20. The central connection block 34 comprises a plurality of branches, each branch connecting one island 20. When the island structures 20 are rectangular and the island structures 20 are arranged in a row-column array, a central connecting block 34 has four branches to connect the four island structures 20, respectively. A central connection block 34 is disposed at the center of every four island-shaped structures 20 to connect the island-shaped structures 20 on the substrate 10 into a whole.

In this embodiment, the plurality of island-shaped structures 20 can be connected by one center connection block 34, so that the flexible display panel 100 can be stretched in any direction, thereby achieving free stretching of the flexible display panel 100.

Specifically, referring to fig. 8, the elastic connection structure 30 includes a main body 35 and a protruding thorn portion 36 disposed on one side or two opposite sides of the main body 35. The body portion 35 is located in the mesh void 40. In other words, the body 35 is in a mesh shape. The spur portion 36 is located in the hollow portion 50. More specifically, the burs 36 fill the hollowed-out portions 50. It will be appreciated that the body portion 35 is connected to the island 20 within the web-like void 40 and the spine portion 36 is connected to the island 20 within the hollowed-out portion 50. It will be appreciated that the number of spurs 36 is the same as the number of hollowed-outs 50 of the island structure 20.

The structure of the spur portion 36 will be described in detail with reference to the drawings, and the connection between the elastic connection structure 30 and one side of the island-like structure 20 will be described below with reference to the extension of the body portion 35 connected to the spur portion 36 along the Y-axis direction.

Optionally, referring to fig. 8, the spur 36 includes at least one first extension 361. The first extension 361 is embedded in the island-shaped structure 20. Specifically, a spur 36 includes a first extension 361. The extending direction of the first extending segment 361 intersects or is perpendicular to the extending direction of the body portion 35 connected thereto.

When the main body 35 extends along the Y-axis direction, the extending direction of the first extending segment 361 can extend along the X-axis direction, so that the first extending segment 361 and the island-shaped structure 20 are engaged with each other when the flexible display panel 100 is subjected to a tensile force along the Y-axis direction, and the connection strength between the island-shaped structure 20 and the elastic connection structure 30 can be increased.

When the main body 35 extends along the Y-axis direction, the extending direction of the first extending segment 361 can intersect with the Y-axis direction, so that when the flexible display panel 100 is subjected to a tensile force along the Y-axis direction or the X-axis direction, the first extending segment 361 and the island-shaped structure 20 are engaged with each other, and the connection strength between the island-shaped structure 20 and the elastic connection structure 30 can be increased.

The number of the first extension 361 on one side of the main body 35 may be plural, and the number of the first extension 361 is illustrated as three in the present application. The three first extension segments 361 may be all provided at the left side of the body portion 35. Further, the right side (with reference to fig. 8) of the main body 35 may be further provided with three first extending segments 361 to improve the connection tightness between the elastic connection structure 30 and the island-shaped structure 20.

Optionally, referring to fig. 9, the spur portion 36 further includes a second extending section 362 and a third extending section 363 connected to the body portion 35. The second extension 362 and the third extension 363 extend opposite to each other on opposite sides of the first extension 361.

Specifically, when the body portion 35 extends in the Y-axis direction, the extending direction of the first extending section 361 may extend in the X-axis direction. The connection points of the first extension 361, the second extension 362 and the third extension 363 to the body portion 35 may be the same or different. In this embodiment, the connection points of the first extension 361, the second extension 362, and the third extension 363 with the body 35 are the same as each other.

Alternatively, referring to fig. 9, the first extension segment 361 extends along the X-axis toward the left side of the main body 35 (refer to fig. 9). The second extension 362 extends upward to the left (with reference to fig. 9) from the body 35, and the third extension 363 extends downward to the left (with reference to fig. 9) from the body.

The first extension 361, the second extension 362 and the third extension 363 form a claw-shaped protruding part 36 to tightly connect the elastic connection structure 30 with the island-shaped structure 20.

Further, referring to fig. 9, the spur portion 36 further includes a fourth extending section 364, a fifth extending section 365 and a sixth extending section 366 connected to the body portion 35, wherein the fourth extending section 364, the fifth extending section 365 and the sixth extending section 366 are all located on the right side of the body portion 35 (refer to fig. 9). The fourth extension 364 extends toward the right side (with reference to fig. 9) of the body portion 35 along the X-axis. The fifth extending portion 365 extends from the main body 35 toward the upper right (with reference to fig. 9), and the sixth extending portion 366 extends from the main body 35 toward the lower right (with reference to fig. 9).

Optionally, referring to fig. 10, the protruding thorn portion 36 further includes a first arc-shaped hook segment 367. The first arc-shaped hook segment 367 is connected to an end of the first extension segment 361 away from the body portion 35. The first extension segment 361 extends leftward in the X-axis direction, and the first arc-shaped hook segment 367 may extend toward the upper left or toward the lower left.

In the present embodiment, the protruding portions 36 form a relatively complex double-hook shape to hook the island-shaped structures 20, so as to increase the connection strength between the elastic connection structure 30 and the island-shaped structures 20, and when the flexible display panel 100 is subjected to a tensile force in any direction, the elastic connection structure 30 and the island-shaped structures 20 can be stably connected together.

Further, referring to fig. 10, the protruding thorn portion 36 further includes a second arc-shaped hook section 368. In one embodiment, referring to fig. 10, the first arc-shaped hooking section 367 and the second arc-shaped hooking section 368 are both connected to the end of the first extending section 361 away from the main body 35. The second arc-shaped hook section 368 is opposite to the first arc-shaped hook section 367. For example, the first extension segment 361 extends leftward in the X-axis direction, the first arc-shaped hook segment 367 extends upward to the left, and the second arc-shaped hook segment 368 extends downward to the left.

The connection strength between the elastic connection structure 30 and the island-shaped structure 20 can be further increased by providing the first arc-shaped hook sections 367 and the second arc-shaped hook sections 368.

In another embodiment, referring to fig. 11, the first curved hook segment 367 is connected to the end of the first extension segment 361 away from the main body 35, the second curved hook segment 368 is connected to the end of the first curved hook segment 367 away from the first extension segment 361, and the opening of the second curved hook segment 368 faces opposite to the opening of the first curved hook segment 367.

The above embodiments are merely descriptions of the connection between one side of the elastic connection structure 30 and one island-shaped structure 20, and reference may be made to the connection between the other side of the elastic connection structure 30 and the island-shaped structure 20.

Referring to fig. 12, the flexible display panel 100 further includes a plurality of pixel units 60 arranged in an array, and an organic light emitting unit 70 disposed on the pixel units 60. At least one pixel unit 60 is disposed on one of the island structures 20. The pixel unit 60 includes a gate line, a data line, a driving circuit, a pixel electrode, and the like. The driving circuit includes at least a thin film transistor. The drain of the thin film transistor is connected to a pixel electrode, the pixel electrode is electrically connected to one side of the organic light emitting unit 70, and the opposite side of the organic light emitting unit 70 is electrically connected to the common electrode. After the gate line transmits a scan signal to the driving circuit and the data line transmits a data signal to the driving circuit, the driving circuit supplies a current to the organic light emitting unit 70 through the turned-on thin film transistor and the pixel electrode, so that the organic light emitting unit 70 emits light to display a picture.

When one pixel unit 60 is provided on one island structure 20, at least the driving circuit is provided on the island structure 20.

The embodiment of the application provides a flexible display panel 100, through set up fretwork portion 50 on island-shaped structure 20, and set up spur portion 36 on elastic connection structure 30, spur portion 36 connects island-shaped structure 20 through the fretwork portion 50 of island-shaped structure 20, so that elastic connection structure 30 and island-shaped structure 20 form the connection mechanism of interlock each other, the connection area of elastic connection structure 30 and island-shaped structure 20 has also been increased, thereby improve the joint strength between elastic connection structure 30 and the island-shaped structure 20, increase flexible display panel 100's reliability.

Referring to fig. 13, the present application further provides a method for manufacturing a flexible display panel 100, including the following steps:

step 100: a plurality of island-shaped structures 20 arranged in an array are formed on a substrate 10, and a mesh-shaped gap 40 is formed between the plurality of island-shaped structures 20, wherein a hollow portion 50 is arranged on an edge of at least one of the island-shaped structures 20, and the hollow portion 50 is communicated with the mesh-shaped gap 40.

Step 100 specifically comprises the following steps:

step 110: projections are provided on the wires of the screen.

Specifically, referring to fig. 14, a screen 1 is provided, and the mesh 3 of the screen 1 includes, but is not limited to, triangle, rectangle, square, diamond, hexagon, octagon, etc. In the present embodiment, the mesh 3 of the silk screen 1 is rectangular, and the silk screen 1 includes a plurality of rows and a plurality of columns of interlaced silk threads. The wires of the screen 1 are surrounded to form a plurality of meshes 3 arranged in an array. Wherein the plurality of filaments surrounding one of said meshes 3 comprises a first filament section 11. Specifically, when the meshes 3 are quadrilateral, four sections of silk threads surround one mesh 3, and one section of the four sections of silk threads is a first silk thread section 11. In this embodiment, the design of the first silk thread segment 11 is taken as an example for explanation, and other silk thread segments of the silk screen 1 may refer to the first silk thread segment 11, which is not described herein again.

Referring to fig. 15, at least one protrusion 2 extending toward the mesh 3 is provided on the first wire segment 11.

Optionally, at least one protrusion 2 is provided on both opposite sides of the first thread segment 11. In particular, the projection 2 comprises at least one first projection 21 perpendicular to or intersecting the first thread segment 11. When the first segment 11 extends along the Y-axis direction, two opposite sides of the first segment 11 may be respectively provided with first protruding sections 21 extending along the X-axis direction.

Further, referring to fig. 16, the protruding portion 2 further includes a second protruding section 22, one end of the second protruding section 22 is connected to the first wire section 11 and/or the first protruding section 21, and the other end of the second protruding section 22 extends to a region between the first protruding section 21 and the first wire section 11.

Specifically, when the first filament segment 11 extends along the Y-axis direction, the first protruding segment 21 extends along the X-axis direction, and the second protruding segment 22 is connected to a connection point between the first protruding segment 21 and the first filament segment 11 or connected to the first filament segment 11, and extends toward an area between the first protruding segment 21 and the first filament segment 11.

Further, referring to fig. 16, the protruding portion 2 further includes a third protruding section 23, one end of the third protruding section 23 is connected to the first wire section 11 and/or the first protruding section 21, and the other end of the third protruding section 23 extends along a side of the first protruding section 21 away from the second protruding section 22.

Specifically, when the first filament segment 11 extends along the Y-axis direction, the first protruding segment 21 extends along the X-axis direction, and the second protruding segment 22 extends towards the upper left (with reference to fig. 16), the third protruding segment 23 is connected to the connection point between the first protruding segment 21 and the first filament segment 11 or connected to the first filament segment 11, and extends towards the side of the first protruding segment 21 away from the second protruding segment 22, that is, the third protruding segment 23 extends towards the upper right (with reference to fig. 16).

Optionally, referring to fig. 17, the protruding portion 2 includes at least one first protruding section 21 perpendicular to or intersecting with the first wire segment 11, so that the protruding portion 2 further includes a first arc-shaped protruding section 24, and the first arc-shaped protruding section 24 is connected to an end of the first protruding section 21 away from the first wire segment 11.

Further, referring to fig. 17, the protruding portion 2 further includes a second arc-shaped protruding section 25, the second arc-shaped protruding section 25 is connected to one end of the first protruding section 21 away from the first wire section 11, and the second arc-shaped protruding section 25 is disposed opposite to the first arc-shaped protruding section 24. Alternatively, referring to fig. 18, the second arc-shaped protruding section 25 is connected to an end of the first arc-shaped protruding section 24 away from the first protruding section 21, and an opening direction of the second arc-shaped protruding section 25 is opposite to an opening direction of the first arc-shaped protruding section 24.

The density and size of the projections 2 of the screen 1 are not particularly limited in the present application.

Step 120: a flexible base material is printed on the substrate 10 through the screen 1.

The screen 1 is fixed to the substrate 10, and a flexible base material is printed on the substrate 10 through the screen 1. Flexible substrate materials include, but are not limited to, Polyimide (PI), polyacrylate, or polyacetate, and the like.

Step 130: and curing the flexible base material to form a plurality of island-shaped structures 20 arranged in an array on the substrate 10.

The flexible substrate material is pre-cured to set the flexible substrate material to initially form the island structures 20. The pre-curing method includes, but is not limited to, heat baking, ultraviolet curing, laser curing, and the like.

Step 140: the screen 1 is withdrawn, so that the area of the substrate 10 corresponding to the screen 1 forms the net-shaped spaces 40 between the island-shaped structures 20, and the area of the protrusions 2 forms the hollowed-out portions 50 at the edges of the island-shaped structures 20.

Step 200: and forming an elastic connection structure 30 connecting at least two adjacent island-shaped structures 20 in the mesh-shaped gap 40, so that a part of the elastic connection structure 30 is filled in the hollow part 50, wherein the elastic modulus of the elastic connection structure 30 is smaller than that of the island-shaped structures 20.

Specifically, step 200 includes filling the mesh-like voids 40 and the hollow-out portions 50 with an elastic connection substrate; the elastomeric joint substrate is cured to form elastomeric joint structures 30 joining at least two adjacent island structures 20.

The elastic connection substrate is filled by means including, but not limited to, coating, ink jet printing, etc., and is cured to form the elastic connection structure 30 between the island structures 20 and the island structures 20. The elastic connection structure 30 is filled in the hollow portion 50 to form the spur portion 36. The shape of the spur 36 can be referred to the above description of the spur 36.

The island structures 20 are again co-cured with the elastic linking structures 30 to form a film, which becomes a complete island substrate suitable for use in stretchable devices.

The flexible display panel 100 provided by this embodiment, by designing the screen 1, on one hand, the complete island-shaped structure 20 and the elastic connection structure 30 can be completed by two processes, so that when the flexible display panel 100 is under acting forces such as stretching, the elastic connection structure 30 can bear stress, and the pixel units 60 in the island-shaped structure 20 are not damaged by stress, on the other hand, by adding the protruding portion 2 on the screen 1, the connection between the island-shaped structure 20 and the elastic connection structure 30 can be increased, so that the island-shaped structure 20 and the elastic connection structure 30 are not easily separated when being stretched, thereby enhancing the overall stress resistance of the flexible display panel 100.

Step 300: at least one pixel cell 60 is formed on the island structure 20.

The pixel unit 60 includes a gate line, a data line, a driving circuit, a pixel electrode, and the like. The gate lines transmit scan signals to the driving circuits, and the data lines transmit data signals to the driving circuits. The driving circuit includes at least a thin film transistor. The drain electrode of the thin film transistor is connected to the pixel electrode.

Step 400: an organic light emitting unit 70 is formed on the pixel unit 60.

The organic light emitting unit 70 includes an anode layer, a hole injection layer, a hole transport layer, an organic light layer, an electron transport layer, an electron injection layer, and a cathode layer, which are sequentially stacked.

The pixel electrode is electrically connected to one side of the organic light emitting unit 70, and the opposite side of the organic light emitting unit 70 is electrically connected to the common electrode. After the gate lines transmit scanning signals to the driving circuit and the data lines transmit data signals to the driving circuit, the driving circuit supplies current to the organic light emitting unit 70 through the turned-on thin film transistors and the pixel electrodes, so that the organic light emitting unit 70 emits light to display a picture.

While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the application, and it is intended that such changes and modifications be covered by the scope of the application.

Claims

1. A flexible display panel, comprising:

a substrate;

2. The flexible display panel according to claim 1, wherein each of the island structures is provided with at least one of the hollow portions, and the elastic connection structure fills the mesh-like gap and the hollow portions.

3. The flexible display panel according to claim 2, wherein the elastic connection structure comprises a body portion and a protruding portion disposed on the body portion, the body portion is located in the mesh gap, the protruding portion is located in the hollow portion, and the protruding portion comprises at least one first extending section embedded in the island-shaped structure.

4. The flexible display panel of claim 3, wherein the spine portion further comprises a second extension segment and a third extension segment connected to the body portion, the second extension segment and the third extension segment extending opposite to each other on opposite sides of the first extension segment.

5. The flexible display panel of claim 3, wherein the spur portion further comprises a first curved hook section and a second curved hook section; the first arc-shaped hook section and the second arc-shaped hook section are connected to the tail end, away from the body part, of the first extension section, and the second arc-shaped hook section and the first arc-shaped hook section are arranged back to back; or, the first arc hook section is connected to the end of the first extension section far away from the body part, the second arc hook section is connected to the end of the first arc hook section far away from the first extension section, and the opening direction of the second arc hook section is opposite to that of the first arc hook section.

6. The flexible display panel according to any one of claims 1 to 5, further comprising a plurality of pixel units arranged in an array, wherein at least one of the pixel units is disposed on the island-shaped structure.

7. A method for manufacturing a flexible display panel, comprising:

forming a plurality of island-shaped structures which are arranged in an array mode on a substrate, and arranging net-shaped gaps among the island-shaped structures, wherein at least one island-shaped structure is provided with a hollow-out part communicated with the net-shaped gaps;

8. The method according to claim 7, wherein the forming a plurality of island-shaped structures arranged in an array and a mesh-shaped gap between the plurality of island-shaped structures on the substrate, wherein at least one of the island-shaped structures is provided with a hollow portion communicating with the mesh-shaped gap, comprises:

arranging a convex part on the silk threads of the silk screen;

printing a flexible base material on a substrate through the screen;

curing the flexible base material to form a plurality of island-shaped structures arranged in an array on the substrate;

and withdrawing the silk screen so as to form a net-shaped gap between the island-shaped structures corresponding to the area of the silk screen on the substrate, and form a hollow-out part arranged at the edge of the island-shaped structures at the area of the protrusion part.

9. The method according to claim 7 or 8, wherein the forming of the elastic connection structure in the mesh-like voids to partially fill the hollow portion comprises:

elastic connection base materials are filled in the reticular gaps and the hollow parts;

and curing the elastic connection substrate to form an elastic connection structure so as to connect at least two adjacent island-shaped structures.

10. The method of manufacturing a flexible display panel according to claim 7, further comprising:

forming at least one pixel unit on the island-shaped structure;

an organic light emitting unit is formed on the pixel unit.