CN112002237B

CN112002237B - Stretchable display panel, display device and assembling method thereof

Info

Publication number: CN112002237B
Application number: CN202010898867.9A
Authority: CN
Inventors: 何睦; 杨铭
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2022-04-12
Anticipated expiration: 2040-08-31
Also published as: CN112002237A

Abstract

The invention discloses a stretchable display panel, a display device and an assembling method thereof, and relates to the technical field of display. The stretchable display panel comprises a first area, a second area and a third area, wherein the second area surrounds the first area in a closed mode, and the third area surrounds the second area in a non-closed mode; wherein the first zone is a non-stretchable zone; the second zone is a stretchable zone; the third zone is a non-stretchable zone or a stretchable zone less stretchable than the second zone; the second area is stretched along the direction of the first area to the outer edge of the display panel and towards the direction perpendicular to the plane where the first area is located, so that the whole second area is bent, the stretchable display panel with a complete full-curved surface is achieved, and the stretchable display panel formed by bending the whole second area has a complete and good display effect.

Description

Stretchable display panel, display device and assembling method thereof

Technical Field

The invention relates to the technical field of display, in particular to a stretchable display panel, a display device and an assembling method of the stretchable display panel.

Background

In the prior art, most curved display screens provided in the market generally only include a set of curved surfaces arranged oppositely, that is, only bending of at most two opposite sides can be realized, and under the condition of maintaining a display area of a display panel to be a complete rectangle, it is difficult to achieve a four-side full-curved structure of the display panel; the small part of curved surface display screen realizes the setting of the four-side full-curved surface of the display panel, a small rectangular area is dug off four corners of the rectangular display panel to form the special-shaped display panel, the four sides of the special-shaped display panel are bent for 90 degrees in a paper folding box mode, but a black splicing seam is formed between two adjacent sides after the bending, and the whole display effect of the four-side full-curved surface display screen is influenced. Therefore, it is desirable to provide a display panel with good display effect, which can realize a full-curved surface of four sides.

Disclosure of Invention

In view of the above, the present invention provides a stretchable display panel, a display device and an assembling method thereof, so as to solve the problem that the display panel cannot realize complete full-curved-surface display without removing corners and has a poor display effect.

In a first aspect, the present application provides a stretchable display panel comprising a first region, a second region, and a third region, wherein the second region surrounds the first region in a closed manner, and the third region surrounds the second region in a non-closed manner;

wherein the first region is a non-stretchable region; the second region is a stretchable region; the third region is a non-stretchable region or a stretchable region that is less stretchable than the second region.

In a second aspect, the present application provides a display device comprising a stretchable display panel comprising a display region and a non-display region;

the display device also comprises cover plate glass, and the edges of the cover plate glass are all of curved surface structures; the display area in the second area of the stretchable display panel is correspondingly attached to the curved surface structure.

In a third aspect, the present application provides a method of assembling a display device, for use in a display device; the glass cover plate comprises a flat area, and a curved surface structure surrounds the flat area;

the assembling method comprises the following steps:

pre-stretching a second region of the stretchable display panel along the first region toward a third region;

bonding the first region of the stretchable display panel with the flat region of the glass cover plate;

bonding the display area of the stretchable display panel located in the second area with the curved structure of the glass cover plate.

Compared with the prior art, the stretchable display panel, the display device and the assembling method thereof provided by the invention at least realize the following beneficial effects:

in the stretchable display panel, the display device and the assembling method thereof provided by the present application, the second region of the stretchable region closely surrounds the first region, and the second region is non-closely surrounded by the third region which is a non-stretchable region or a stretchable region less stretchable than the second region; the second region with the stretchable effect is used for forming a curved surface structure of the stretchable display panel, and the second region is the stretchable region, so that the second region of the stretchable display panel is stretched towards the outer edge of the display panel along the first region and towards the direction perpendicular to the plane where the first region is located, so that the whole second region is bent, the stretchable display panel with the complete full-curved surface is achieved, and the stretchable display panel formed by bending the whole second region has a complete and good display effect.

Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a top view of a stretchable display panel according to an embodiment of the present application;

fig. 2 is a top view of a stretchable display panel according to an embodiment of the present application;

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

fig. 4 is a schematic top view illustrating a stretchable display panel according to an embodiment of the present application;

fig. 5 is a top view of a stretchable display panel according to an embodiment of the present application;

FIG. 6 is a schematic diagram illustrating a distribution of the display area and the non-display area in FIG. 5 according to an embodiment of the present application;

FIG. 7 is a schematic illustration of FIG. 1 including a transition region according to an embodiment of the present application;

FIG. 8 is a schematic diagram illustrating a distribution of the display area and the non-display area in FIG. 2 according to an embodiment of the present application;

FIG. 9 is a schematic diagram illustrating a distribution of the display area and the non-display area in FIG. 3 according to an embodiment of the present application;

FIG. 10 is a schematic view of the display area of FIG. 8 according to an embodiment of the present disclosure;

FIG. 11 is another schematic view of the display area of FIG. 8 according to an embodiment of the present disclosure;

FIG. 12 is an enlarged schematic view of the area A in FIG. 9 according to an embodiment of the present disclosure;

FIG. 13 is another enlarged schematic view of the area A in FIG. 9 according to an embodiment of the present disclosure;

FIG. 14 illustrates a top view of FIG. 1 in accordance with an embodiment of the present application;

FIG. 15 is a schematic view of the corner region of FIG. 14 according to an embodiment of the present application;

FIG. 16 is another schematic view of the corner region of FIG. 14 provided by an embodiment of the present application;

FIG. 17 is a schematic view of a region B in FIG. 14 according to an embodiment of the present disclosure;

FIG. 18 is a schematic view of the corner region of FIG. 17 provided by an embodiment of the present application;

fig. 19 is a schematic view of a display device according to an embodiment of the present application;

FIG. 20 is a cross-sectional view of a CC' of FIG. 19 according to an embodiment of the present application;

FIG. 21 is a cross-sectional view of another CC' of FIG. 19 as provided by an embodiment of the present application;

FIG. 22 is a cross-sectional view of still another CC' of FIG. 19 according to an embodiment of the present application;

FIG. 23 is a cross-sectional view of still another CC' of FIG. 19 as provided by an embodiment of the present application;

fig. 24 is a flowchart illustrating an assembling method of a display device according to an embodiment of the present disclosure;

fig. 25 is another flowchart illustrating an assembling method of a display device according to an embodiment of the present disclosure;

fig. 26 is a flowchart illustrating a method for assembling a display device according to an embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the prior art, most curved display screens provided in the market generally only include a set of curved surfaces arranged oppositely, that is, bending of at most two opposite sides can be realized, and under the condition of maintaining a display area of a display panel to be a complete rectangle, it is difficult to realize a four-side full-curved structure of the display panel; the small part of curved surface display screen realizes the setting of the four-side full-curved surface of the display panel, a small rectangular area is dug off four corners of the rectangular display panel to form the special-shaped display panel, the four sides of the special-shaped display panel are bent for 90 degrees in a paper folding box mode, but a black splicing seam is formed between two adjacent sides after the bending, and the whole display effect of the four-side full-curved surface display screen is influenced. Therefore, it is desirable to provide a display panel with good display effect, which can realize a full-curved surface of four sides.

Fig. 1 is a top view of a stretchable display panel according to an embodiment of the present application, fig. 2 is another top view of the stretchable display panel according to the embodiment of the present application, fig. 3 is another top view of the stretchable display panel according to the embodiment of the present application, and fig. 4 is another top view of the stretchable display panel according to the embodiment of the present application, please refer to fig. 1-4; the present application provides a stretchable display panel 100, comprising a first region 10, a second region 20, a third region 30, the second region 20 enclosing around the first region 10, the third region 30 not enclosing around the second region 20;

wherein the first region 10 is a non-stretchable region; the second zone 20 is a stretchable zone; the third region 30 is a non-stretchable region or a stretchable region that is less stretchable than the second region 20.

Specifically, the present application provides a stretchable display panel 100, comprising at least a first region 10, a second region 20 and a third region 30, wherein the first region 10 is an entire non-stretchable region, the second region 20 is a stretchable region, the second region 20 closely surrounds the first region 10, the third region 30 is a non-stretchable region or a stretchable region less stretchable than the second region 20, and the third region 30 non-closely surrounds the second region 20; that is, the first region 10 is a rigid region, for example, can be used as a complete display region in the stretchable display panel 100, the stretchable display panel 100 can form a bending region surface by stretching the second region 20 which is used as the stretchable region, at least a part of the second region 20 after bending can also be used as the display region, so as to implement a complete curved surface structure of the stretchable display panel 100, and the curved surface display of the stretchable display panel 100 can also be implemented in a specific design, so as to meet the pursuit of the current user for the display panel 100 with the full curved surface display effect.

It should be noted that the shape of the first region 10, the second region 20, or the third region 30 is not limited in this application, for example, the first region 10 may be a right-angled rectangle shown in fig. 1, a rounded rectangle shown in fig. 2-4, or other shapes, and the orthographic projection of the edge of the second region 20 close to the first region 10 on the light-emitting surface of the stretchable display panel 100 coincides with the orthographic projection of the edge of the first region 10 close to the second region 20 on the light-emitting surface of the stretchable display panel 100, but the shape of the edge of the second region 20 far from the first region 10 is not limited in this application as long as the second region 20 can surround the first region 10 in a closed manner; the third region 30 is selected to be a non-stretchable region or a stretchable region having a smaller degree of stretchability than the second region 20, such that the third region 30 has a lower stretchability than the second region 20, and when the second region 20 is stretched, the first region 10 and the third region 30 can be used as a force application portion for stretching the second region 20, so as to ensure a stretching effect on the second region 20 of the stretchable display panel 100, and thus a complete four-curved-surface structure of the stretchable display panel 100 is realized.

As can be seen, the stretchable display panel 100 provided in the present application includes a first region 10 which is a rigid region (non-stretchable region), surrounds the first region 10 in a closed manner by a second region 20 which is a flexible region (stretchable region), surrounds the second region 20 in a non-closed manner by a third region 30 which is a rigid region (non-stretchable region); that is, the flexible second region 20 enclosing around the first region 10 can achieve an omni-directional stretching effect of the stretchable display panel 10, so that the stretchable display panel 100 can be stretched at any position along the first region 10 towards the third region 30, thereby achieving a fully curved structure (four-sided fully curved structure) of the display panel 100. The rigid third region 30 surrounds the second region 10 in a non-closed manner, so that the third region 30 is divided into a plurality of independent regions, for example, four rectangular regions as shown in fig. 1, when the display panel 100 is bent through the second region 20, the plane of the third region 30 can be in a position perpendicular to the plane of the first region 10, and the third region 30 is equivalent to four rectangular regions, namely four sides of the "uncovered box", and since the four rectangular regions are independent, the tight splicing between the four rectangular regions 30 of the stretchable display panel 100 forming the full-curved structure can be realized, and the occurrence of material redundancy is avoided; and the flexible second region 20 formed at the edge of the full-curved surface in the display panel 100 provided by the present application can also avoid the splicing trace at the edge of the full-curved surface, which is beneficial to improving the overall display effect of the stretchable display panel 100, thereby also improving the display effect of the stretchable display panel 100.

Referring to fig. 3 and fig. 4, optionally, one side edge of the second region 20 away from the first region 10 is recessed toward the inside of the first region 10 to form at least one recessed portion 21, and at least a portion of the third region 30 in the orthographic projection of the light-emitting surface of the stretchable display panel 100 is located within the orthographic projection range of the recessed portion 21 on the light-emitting surface.

Specifically, since the present application does not limit the edge shape of the second region 20 on the side away from the first region 10, as long as the second region 20 can closely surround the first region 10; therefore, when the second region 20 is recessed towards the inside of the first region 10 from a side edge of the second region 20 away from the first region 10 to form at least one recessed portion 21, at least a portion of the third region 30 may be disposed in the recessed portion 21, specifically, at least a portion of the third region 30 in the orthographic projection of the light-emitting surface of the stretchable display panel 100 is located in the orthographic projection range of the recessed portion 21 in the light-emitting surface, for example, a portion of the third region 30 close to one side of the second region 20 shown in fig. 3 is filled in the recessed portion 21, so that the first region 10, the second region 20 and the third region 30 can form a complete stretchable display panel 100, and the display panel 100 with four full curved surfaces is realized by stretching at least the second region 20. Further, as also shown in fig. 4, the third region 30 may be entirely located in the recess 21 to form a regularly shaped stretchable display panel 100, or a specially shaped stretchable display panel 100 having a recess region, for example, a shortest distance between an edge of the third region 30 on a side away from the first region 10 and the first region 10 is smaller than a shortest distance between an edge of the second region 20 on a side away from the first region 10 and the first region 10. The different arrangement of the third region 30 facilitates the appearance diversity of the stretchable display panel 100 to meet the requirements of more users for different appearances of the stretchable display panel 100.

In the stretchable display panel 100 shown in fig. 3, the third region 30 closely surrounding the second region 20 is disposed on the side of the second region 20 away from the first region 10, and the third region 30 also extends to the side of the second region 20 away from the first region 10 after filling the recess 21 in the second region 20; the provision of the rigid third region 30 in combination with the rigid first region 10 facilitates the application or transmission of forces that cause the stretching of the second region 20 to deform; when the second region 20 is stretched to form an edge-congruent curved structure, the corner regions of the second region 20 on the side close to the corners of the first region 10 form a spherical surface, so that the third region 30 is provided to assist in stretching the corner regions of the second region 20 and finally forming a spherical surface, and the rigid first region 10 and the rigid third region 30 on both sides of the flexible second region 20 also facilitate shaping of the formed spherical corner regions. Since the corner regions are not bent like the edge regions along the straight edges, only bending along a bending axis in one direction is considered, and the corner regions are not bent like the edge regions, and the third regions 30 can be directly adjacently connected to the corner regions at the outer side of the corner regions away from the first region 10, the present application is advantageous for assisting the second region 20 to be stretched to form the stretchable display panel 100 with the full-curved surface by disposing the third regions 30 at the side of the second region 20 away from the first region 10, and is also advantageous for maintaining a certain shape of the formed display panel 100 with the full-curved surface structure, thereby improving the manufacturing yield of the stretchable display panel 100.

As shown in fig. 3, the stretchable display panel 100, the third region 30 includes four independent regions, the second region 20 is surrounded by the third region 30 having an independent structure in a non-closed manner, the third region 30 independently disposed after the display panel 100 forms a full-curved structure can be tightly spliced with each other, the occurrence of material redundancy is avoided, the third region 30 which is just fitted with can avoid the occurrence of separation of films with different stretching capabilities, and the production yield of the stretchable display panel 100 is improved.

It should be noted that, the stretchable display panel 100 having the first region 10 with rounded rectangles is taken as an example in fig. 3-4 provided in the present application, but the present application does not limit the shape and corner shape of each region of the display panel 100, as long as the second region 20 surrounds the first region 10 in a closed manner, the third region 30 surrounds the second region 20 in a non-closed manner, and the second region 20 is a stretchable region, so that the display panel 100 can become a display panel with a full-curved structure by stretching the whole second region 20. The shape, area, number, etc. of the recessed portions 21 are not particularly limited in the present application, and fig. 3 and 4 only provide a color scheme in which two sets of recessed portions 21 are symmetrically disposed, but the recessed portions 21 only need to satisfy the region where the outer edge of the second region 20 is recessed toward the inside of the panel, and do not contact the first region 10.

Referring to fig. 4, optionally, an orthogonal projection of the third region 30 on the light emitting surface and an orthogonal projection of the concave portion 21 on the light emitting surface are overlapped.

Specifically, the present application provides a setting mode of the third region 30 in the stretchable display panel 100, where the entire third region 30 is disposed inside the recessed portion 21, and for the aesthetic property and popularity of the surface shape of the stretchable display panel 100, the orthographic projection of the third region 30 on the light-emitting surface of the stretchable display panel 100 and the orthographic projection of the recessed portion 21 on the light-emitting surface of the stretchable display panel 100 may be specifically set to coincide, specifically: the outer edge of the third region 30 on the side far from the first region 10 is flush with the outer edge of the second region 20 on the side far from the first region 10, which together form the outer edge of the stretchable display panel 100; such that the stretchable display panel 100 formed by the first, second and third regions 10, 20, 30 has a regular shape, for example a regular rounded rectangular panel as shown in fig. 4; the formed display panel 100 has smooth peripheral contour, no sharp corner can appear at the junction of the peripheral contour corresponding to different areas, stress concentration can be avoided, the situation that film layers with different stretching capabilities are separated can be avoided, and the service life of the stretchable display panel 100 is prolonged. The stretchable display panel 100 can be used to fabricate a flat display device with a stretchable effect, wherein the second region 20 has the ability to be stretched; the stretchable display panel 100 can be manufactured into a display device with at least one curved surface or a display device with four full-curved surfaces, so that diversified requirements of the stretchable display panel 100 are met, and different using modes of the stretchable display panel 100 are realized while the characteristics of attractiveness, popularity and the like of the stretchable display panel 100 are guaranteed.

Fig. 5 is a top view of a stretchable display panel provided in an embodiment of the present application, referring to fig. 5, optionally, the stretchable display panel 100 further includes a fourth region 40, wherein the fourth region 40 surrounds the second region 20 and the third region 30 in a non-closed manner;

wherein the third region 30 is a stretchable region and the fourth region 40 is a non-stretchable region.

Specifically, when the orthographic projection of the third region 30 on the light-emitting surface of the stretchable display panel 100 in the stretchable display panel 100 and the orthographic projection of the recess 21 on the light-emitting surface of the stretchable display panel 100 are overlapped, the stretchable display panel 100 may further include a fourth region 40, the fourth region 40 surrounds the second region 20 and the third region 30 in a closed manner, and at this time, the third region 30 and the second region 20 may both be stretchable regions, or only the second region may be stretchable regions, the fourth region 40 may be configured as a non-stretchable region, and in addition, the fourth region 40 may also be configured as a stretchable region having a stretchability degree smaller than that of the second region 20 and smaller than that of the third region 30; the second region 20 and/or the third region 30 are/is stretched by the fourth region 40 and the first region 10, so that the second region 20 and/or the third region 30 are/is stretched to form a bending curved surface, thereby realizing a full curved surface structure of the stretchable display panel 100, and realizing curved surface display of the stretchable display panel 100 in a specific design, so as to meet the pursuit of the current user on the display panel 100 with a full curved surface display effect.

It should be noted that, in the stretchable display panel 100 provided in fig. 1, fig. 2, fig. 3 and fig. 5, four unconnected corner regions located on one side of the panel away from the center, for example, at least a part of the third region 30 and the fourth region 40, are disposed on the outer side of the display panel 100 that is enclosed into a regular pattern, when the stretchable region of the stretchable display panel 100 is stretched to form a full curved surface, the four corner regions are bent to the sides, so that the four bent corner regions and the first region 10 are present at 90 °, the four corner regions are independently disposed to form a box shape after being bent, which is beneficial to avoiding redundancy of the corner regions when the four corner regions are bent, and the four corner regions may be all disposed as non-display regions without affecting the overall display effect of the display panel.

Fig. 6 is a schematic distribution diagram of the display area and the non-display area in fig. 5 provided in the embodiment of the present application, please refer to fig. 5 and fig. 6, optionally, the stretchable display panel 100 includes a display area 51 and a non-display area 52, a front projection of the display area 51 on the light emitting surface covers the first area 10, at least a portion of the second area 20 and the third area 30, and a front projection of the non-display area 52 on the light emitting surface covers at least a portion of the second area 20 and the fourth area 40;

the display area 51 in the second area 20 closely surrounds the first area 10, and the non-display area 52 in the second area 20 closely surrounds the display area 51 in the second area 20.

Specifically, the stretchable display panel 100 provided by the present application includes a display area 51 and a non-display area 52, wherein an orthographic projection of the display area 51 on a light emitting surface of the stretchable display panel 100 covers the first area 10, at least a portion of the second area 20, and the third area 30, that is, the first area 10 is a complete display area 51 of the display panel 100, for example, the first area 10 may be a central display area in the display panel 100 having a curved surface structure and parallel to a substrate in the panel; the portion of the second region 20 that is the display region 51 is disposed at a side portion of the second region 20 close to the first region 10, and the display region 51 in the second region 20 is disposed around the first region 10, such that the display region 51 in the first region 10 and the display region 51 in the second region 20 can form a regular and complete display region 51, and when the second region 20 is stretched to form a curved surface structure, the display region 51 in the second region 20 can be used as a curved surface display region of the display panel 100, thereby achieving a display effect of a full curved surface of the stretchable display panel 100, and improving an aesthetic property of a display device using the stretchable display panel 100.

When the orthographic projection of the third region 30 on the light-emitting surface of the stretchable display panel 100 and the orthographic projection of the concave portion 21 on the light-emitting surface are overlapped, and the stretchable display panel 100 includes the fourth region 40 surrounding the second region 20 and the third region 30 in a non-closed manner, the entire third region 30 may be set as the display region 51; the third region 30 may be arranged to seamlessly engage with the display region 51 in the second region 20 such that the first region 10, at least part of the second region 20 and the third region 30 may be used to display a complete picture; the non-display area 52 may also be disposed between the third area 30 and the display area 51 in the second area 20, so that the third area 30, the first area 10 and the second area 20 are respectively used for displaying different contents, and because the third area 30 and the second area 20 are stretchable areas, when the stretchable display panel 100 forms a full-curved structure, the third area 30 is located on the side of the display panel 100, and the third area 30 may be used as a normal display area, for example, the third area 30 is used for displaying functions of time, weather, date, message reminding, and the like, which is beneficial to realizing diversified display effects of the stretchable display panel 100 and improving user experience.

The orthographic projection of the non-display area 52 on the light-emitting surface of the stretchable display panel 100 covers at least a part of the second area 20 and the fourth area 40, the non-display area 52 in the second area 20 is connected with the fourth area 40, the non-display area 52 in the second area 20 surrounds the display area 51 in the second area 20, specifically, the non-display area 52 in the second area 20 can be selectively arranged to surround the display area 51 in the second area 20 in a closed manner, and the diversified display requirements of the stretchable display panel 100 are met by combining the arrangement of the display area 51 in the third area 30.

It should be noted that, when the stretchable display panel 100 provided in the present application has the fourth region 40, and the fourth region 40 surrounds the third region 30 and the second region 20 in a non-closed manner, the fourth region 40 can be bent through the second region 20, so that the fourth region 40 is folded to the back of the first region 10, which is beneficial to reducing the thickness occupied by the frame region of the stretchable display panel 100, and is beneficial to the thinning of the display panel 100.

Fig. 7 is a schematic view of fig. 1 including a transition region according to an embodiment of the present application, and referring to fig. 7, the stretchable display panel 100 further includes a transition region 60, wherein the transition region 60 is disposed between the non-stretchable region and the stretchable region; the elastic modulus of the transition zone 60 lies between the elastic modulus of the non-stretchable region and the elastic modulus of the stretchable region.

Specifically, the stretchable display panel 100 provided herein further includes a transition region 60, wherein the transition region 60 is configured to be disposed between the non-stretchable region and the stretchable region, for example, the transition region 60 shown in fig. 7 is located between the first region 10 and the second region 20 and between the second region 20 and the third region 30, wherein the first region 10 and the third region 30 may be non-stretchable regions, and the second region 20 is a stretchable region. The present application contemplates that the transition region 60 has a modulus of elasticity that is greater than the modulus of elasticity of the stretchable region and less than the modulus of elasticity of the non-stretchable region; in particular, it may be arranged that the elastic modulus of the transition zone 60 becomes gradually larger in a direction from the stretchable zone to the non-stretchable zone. By using the transition region 60 as a linking structure between the non-stretchable region and the stretchable region, it is advantageous to avoid that the stretchable region exerts too much stretching force on the non-stretchable region, resulting in the risk of the non-stretchable region being pulled apart or torn; thereby contributing to an improvement in the good yield and the lifespan of the stretchable display panel 100.

Fig. 8 is a schematic distribution diagram of the display area and the non-display area in fig. 2 according to an embodiment of the present disclosure, and fig. 9 is a schematic distribution diagram of the display area and the non-display area in fig. 3 according to an embodiment of the present disclosure, please refer to fig. 2, fig. 3, fig. 8, and fig. 9, alternatively, the stretchable display panel 100 includes a display area 51 and a non-display area 52, and a front projection of the display area 51 on a light-emitting surface of the stretchable display panel 100 covers the first area 10 and at least a portion of the second area 20; the orthographic projection of the non-display area 52 on the light exit surface covers at least part of the second area 20 and at least part of the third area 30,

Specifically, referring to fig. 2 and 8, the stretchable display panel 100 provided by the present application includes a display area 51 and a non-display area 52, when the stretchable display panel 100 does not include the fourth area 40, a front projection of the display area 51 in the stretchable display panel 100 on a light-emitting surface of the stretchable display panel 100 covers the first area 10 and at least a portion of the second area 20, and a front projection of the non-display area 52 on the light-emitting surface covers at least a portion of the second area 20 and at least a portion of the third area 30. As shown in fig. 8, when the second region 20 of the stretchable display panel 100 is closed around the first region 10 and the third region 30 is closed around the second region 20, the display region 51 includes a portion of the second region 20 close to the first region 10 and the entire first region 10, and the non-display region 52 includes a portion of the second region 20 far from the first region 10 and the entire third region 30; the non-display area 52 in the second area 20 now surrounds the display area 51 in the second area 20 in a closed manner and the third area 30 surrounds the second area 20 in a non-closed manner. Referring to fig. 3 and 9, for example, when the second region 20 includes the recess 21 and at least a portion of the third region 30 is located in the recess 21, the third region 30 located in the recess 21 can be set as the display region 51, and the third region 30 located outside the recess 21 is set as the non-display region 52.

By adjusting the areas included in the stretchable display panel 100 and the positions of the display area 51 and the non-display area 52 in the included areas, the stretchable display panel 100 is favorable for realizing diversified appearance display and diversified display effects, is favorable for providing various choices for users, and improves the experience of the users.

When the third region 30 located outside the recess 21 is the non-display region 52, and the third region 30 surrounds the second region 20 in a non-closed manner, the third region 30 can be bent through the second region 20, so that a portion of the third region 30 located on one side of the second region 20 far away from the first region 10 is turned over to the back of the first region 10, which is beneficial to reducing the thickness occupied by the frame region of the stretchable display panel 100, and is beneficial to the thinning of the display panel 100.

It should be further noted that the second region 20 does not include the recess 21, and the third region 30 is located on a side of the second region 20 away from the first region 10, when the third region 30 surrounds the second region 20 in a non-closed manner, the third region 30 can be bent through the second region 20, so that a part of the third region 30 is turned over to the back of the first region 10, which is beneficial to reducing the thickness occupied by the frame region of the stretchable display panel 100, and is beneficial to the thinning of the display panel 100.

Fig. 10 is a schematic view of the display area in fig. 8 according to an embodiment of the present disclosure, referring to fig. 2, fig. 8 and fig. 10, optionally, the display panel 100 further includes a plurality of sub-pixel units 70 arranged in the display area 51, the second region 20 includes a bent state and a non-bent state, and in the non-bent state:

the arrangement density of the sub-pixel units 70 located in the second region 20 is greater than or equal to the arrangement density of the sub-pixel units 70 located in the first region 10.

Specifically, the stretchable display panel 100 provided by the present application includes a plurality of sub-pixel units 70 arranged in the display area 51, and the second region 20 is a stretchable area, and may include a bent state and a non-bent state, where the whole stretchable display panel 100 in the non-bent state is located on the same plane, and the stretchable display panel 100 in the bent state forms a curved panel structure having a full curved surface.

When the display area 51 of the stretchable display panel 100 only covers the first region 10 and at least a portion of the second region 20, in the non-bent state of the stretchable display panel 100, the present application provides a setting manner of the sub-pixel unit 70: the arrangement density of the sub-pixel units 70 in the second region 20 is greater than that of the sub-pixel units 70 in the first region 10, and mainly along the stretching direction of the stretchable display panel 100, the arrangement density of the sub-pixel units 70 in the second region 20 is greater than that of the sub-pixel units 70 in the first region 10. With such an arrangement, after the second region 20 of the stretchable display panel 100 is stretched (for example, the panel is stretched along the row arrangement direction and/or the column arrangement direction of the sub-pixel units 70), the distance between the sub-pixel units 70 in the second region 20 is increased, so that the stretchable display panel 100 is stretched to form a full-curved structure, and the arrangement densities of all the sub-pixel units 70 in the second region 20 and the first region 10 are approximately the same, which is beneficial to improving the display uniformity of the stretchable display panel 100 and improving the display effect of the display panel 100.

In addition, when the stretchable display panel 100 is in the non-bent state, the arrangement density of the sub-pixel units 70 in the second region 20 may also be set to be equal to the arrangement density of the sub-pixel units 70 in the first region 10, that is, the arrangement densities of all the sub-pixel units 70 in the manufactured stretchable display panel 100 are the same, so that the arrangement is favorable for the integral molding of the sub-pixel units 70 in the manufacturing process of the display panel 100, the manufacturing process of the stretchable display panel 100 is simplified, and the manufacturing efficiency of the display panel 100 is improved.

Fig. 11 is another schematic view of the display area in fig. 8 provided in the embodiment of the present application, please refer to fig. 2, 8 and 11, optionally, the display panel 100 further includes a plurality of sub-pixel units 70 arranged in the display area 51, the second region 20 includes a bent state and a non-bent state, and in the non-bent state:

the size of the sub-pixel unit 70 located in the second region 20 is greater than or equal to the size of the sub-pixel unit 70 located in the first region 10.

When the display area 51 of the stretchable display panel 100 only covers the first region 10 and at least a portion of the second region 20, in the non-bent state of the stretchable display panel 100, the present application provides a setting manner of the sub-pixel unit 70: the sub-pixel unit 70 in the second region 20 is configured to have a larger size than the sub-pixel unit 70 in the first region 10, mainly the length of the sub-pixel unit 70 in the second region 20 along the stretching direction of the stretchable display panel 100 is larger, so that the sub-pixel unit 70 in the second region 20 has a larger size. When the second region 20 of the stretchable display panel 100 is stretched, the larger-sized sub-pixel unit 70 may compensate for the display effect of the stretched second region 20 to some extent, which is beneficial to weaken the problem that the non-display area 52 in the second region 20 is stretched to be larger, so that the display effect of the second region 20 is deteriorated.

In addition, when the stretchable display panel 100 is in the non-bent state, the size of the sub-pixel unit 70 located in the second region 20 may also be set to be equal to the size of the sub-pixel unit 70 located in the first region 10, that is, the sizes of all the sub-pixel units 70 in the manufactured stretchable display panel 100 are the same, so that the arrangement is beneficial to the integral molding of the sub-pixel units 70 in the manufacturing process of the display panel 100, the manufacturing process of the stretchable display panel 100 is simplified, and the manufacturing efficiency of the display panel 100 is improved.

Referring to fig. 3 and fig. 9, optionally, the orthographic projection of the display area 51 on the light emitting surface further covers at least part of the third area 30, the edge of one side of the second area 20 away from the first area 10 is recessed toward the inside of the first area 10 to form at least one recessed portion 21, at least part of the orthographic projection of the third area 30 on the light emitting surface is located within the orthographic projection range of the recessed portion 21 on the light emitting surface, and the orthographic projection of the display area 51 on the light emitting surface in the third area 30 and the orthographic projection of the recessed portion 21 on the light emitting surface are overlapped.

Specifically, in the stretchable display panel 100 provided in the present application, the orthographic projection of the display area 51 on the light emitting surface of the stretchable display panel 100 may further cover at least a part of the third area 30, which specifically may be: when the second region 20 of the stretchable display panel 100 provided in the present application is recessed towards the inside of the first region 10 at a side edge thereof away from the first region 10 to form at least one recessed portion 21, at least a portion of the orthographic projection of the third region 30 on the light-emitting surface of the stretchable display panel 100 may be located within the orthographic projection range of the recessed portion 21 on the light-emitting surface, and at this time, the orthographic projection of the display region 51 on the light-emitting surface in the third region 30 and the orthographic projection of the recessed portion 21 on the light-emitting surface are overlapped; that is, the present application provides a setting manner of the display area 51 in the third area 30 as follows: the region of the third region 30 located inside the recessed portion 21 is the display region 51, and the region of the third region 30 located outside the recessed portion 21 may be the non-display region 52.

By adjusting the size of the third region 30 and whether the sub-pixel units 70 are arranged at different positions in the third region 30 as the display region 51 or the non-display region 52, the design of diversified display of the stretchable display panel 100 is realized, and the requirements of different appearances and different display effects of the stretchable display panel 100 are favorably met.

Fig. 12 is an enlarged schematic view of the area a in fig. 9 according to an embodiment of the present disclosure, referring to fig. 3, 9 and 12, optionally, the display panel 100 further includes a plurality of sub-pixel units 70 arranged in the display area 51, and the second area 20 includes a bent state and a non-bent state, where:

the arrangement density of the sub-pixel units 70 located in the third region 30 is greater than or equal to the arrangement density of the sub-pixel units 70 located in the first region 10, and is less than or equal to the arrangement density of the sub-pixel units 70 located in the second region 20.

When the display region 51 of the stretchable display panel 100 covers the first region 10 and at least a portion of the second region 20 and at least a portion of the third region 30, in a non-bent state of the stretchable display panel 100, the present application provides a manner of setting the sub-pixel unit 70: the arrangement density of the sub-pixel units 70 in the third region 30 is greater than the arrangement density of the sub-pixel units 70 in the first region 10 and less than the arrangement density of the sub-pixel units 70 in the second region 20, and mainly along the stretching direction of the stretchable display panel 100, the arrangement density of the sub-pixel units 70 in the third region 30 is greater than the arrangement density of the sub-pixel units 70 in the first region 10 and less than the arrangement density of the sub-pixel units 70 in the second region 20; with such an arrangement, after the second region 20 and the third region 30 of the stretchable display panel 100 are stretched, the distance between each sub-pixel unit 70 in the second region 20 and the third region 30 is increased, so that after the stretchable display panel 100 is stretched to form a full-curved-surface structure, the arrangement density of all sub-pixel units 70 in the third region 30, the second region 20 and the first region 10 is approximately the same, which is beneficial to improving the display uniformity of the stretchable display panel 100 and improving the display effect of the display panel 100.

In addition, when the stretchable display panel 100 is in the non-bent state, the arrangement density of the sub-pixel units 70 in the third region 30 may also be set to be equal to the arrangement density of the sub-pixel units 70 in the first region 10 and equal to the arrangement density of the sub-pixel units 70 in the second region 20; that is, the arrangement density of all the sub-pixel units 70 in the manufactured stretchable display panel 100 is the same, so that the arrangement is favorable for the integral molding of the sub-pixel units 70 in the manufacturing process of the display panel 100, the manufacturing process of the stretchable display panel 100 is simplified, and the manufacturing efficiency of the display panel 100 is improved.

Fig. 13 is another enlarged schematic view of the region a in fig. 9 according to an embodiment of the present disclosure, referring to fig. 3, 9 and 13, optionally, the display panel 100 further includes a plurality of sub-pixel units 70 arranged in the display area 51, and the second region 20 includes a bent state and a non-bent state, where:

the size of the sub-pixel unit 70 located in the third region 30 is greater than or equal to the size of the sub-pixel unit 70 located in the first region 10 and less than or equal to the size of the sub-pixel unit 70 located in the second region 20.

When the display region 51 of the stretchable display panel 100 covers the first region 10 and at least a portion of the second region 20 and at least a portion of the third region 30, in a non-bent state of the stretchable display panel 100, the present application provides a manner of setting the sub-pixel unit 70: setting the size of the sub-pixel unit 70 located in the third region 30 to be larger than the size of the sub-pixel unit 70 located in the first region 10 and smaller than the size of the sub-pixel unit 70 located in the second region 20, mainly the length of the sub-pixel unit 70 located in the third region 30 along the stretching direction of the stretchable display panel 100 is larger than the length of the sub-pixel unit 70 located in the first region 10 and smaller than the length of the sub-pixel unit 70 located in the second region 20, so that the size of the sub-pixel unit 70 located in the third region 30 is larger than the size of the sub-pixel unit 70 located in the first region 10 and smaller than the size of the sub-pixel unit 70 located in the second region 20; when the second region 20 of the stretchable display panel 100 is stretched, the larger-sized sub-pixel unit 70 may compensate the display effect of the stretched third region 30 and second region 20 to some extent, which is beneficial to weaken the problem that the regions of the non-display region 52 in the third region 30 and second region 20 are stretched to be larger, so that the display effect thereof is deteriorated.

In addition, in the non-bent state of the stretchable display panel 100, the size of the sub-pixel unit 70 located in the third region 30 may also be set to be equal to the size of the sub-pixel unit 70 located in the first region 10 and equal to the size of the sub-pixel unit 70 located in the second region 20; that is, the dimensions of all the sub-pixel units 70 in the manufactured stretchable display panel 100 are the same, so that the arrangement is favorable for the integral molding of the sub-pixel units 70 in the manufacturing process of the display panel 100, the manufacturing process of the stretchable display panel 100 is simplified, and the manufacturing efficiency of the display panel 100 is improved.

Fig. 14 is a top view of fig. 1 provided in an embodiment of the present application, please refer to fig. 14, and optionally, the second area 20 includes a plurality of edge areas 81 and a plurality of corner areas 82, and the corner areas 82 connect two adjacent edge areas 81;

the modulus of elasticity of the corner regions 82 is less than the modulus of elasticity of the side regions 81.

Specifically, the second region 20 in the stretchable display panel 100 provided by the present application is a stretchable region, and the second region 20 includes a plurality of side regions 81 and a plurality of corner regions 82, for example, when the first region 10 is rectangular, the corner regions 82 are disposed outside corners of the first region 10 and between any two adjacent side regions 81, a central corner of the corner region 82 is a corner of the first region 10, and the side regions 81 are disposed along a direction in which each side of the first region 10 extends. Wherein, this application sets up the elastic modulus of corner region 82 and is less than the elastic modulus of limit region 81, so that compare in limit region 81, corner region 82 has better tensile performance, make the tensile of diagonal region 82 go on better, also be favorable to corner region 82 to form required crooked formula fan-shaped structure after being stretched, for with the shell that has the display device of four sides global curved surface carry out the adaptation, be favorable to improving the preparation effect of tensile display panel 100, and then can improve the good productivity of tensile display panel 100.

When the first area 10 is a polygon, the second area 20 is a polygonal ring with the polygon as a surrounding path; further, the second region 20 may be located around the first region 10 along the path of the rounded polygonal ring; optionally, the outer contour of the first region 10 is a common N-polygon or a rounded N-polygon, and the path of the second region 20 is a rounded N-polygon, where N is an integer greater than or equal to 3; in this case, the corner region 82 is a partial region corresponding to the corner of the rounded polygon in the second region 20.

With reference to fig. 14, optionally, the second area 20 includes a plurality of edge areas 81 and a plurality of corner areas 82, and the corner areas 82 connect two adjacent edge areas 81; the angular region 82 has a fan-shaped configuration, the center of which is located between the first region 10 and the circular arc line of the fan-shaped configuration in the direction from the first region 10 to the second region 20.

Specifically, the second region 20 in the stretchable display panel 100 provided by the present application is a stretchable region, and the second region 20 includes a plurality of side regions 81 and a plurality of corner regions 82, for example, when the first region 10 is rectangular, the corner regions 82 are disposed outside corners of the first region 10 and between any two adjacent side regions 81, a central corner of the corner region 82 is a corner of the first region 10, and the side regions 81 are disposed along a direction in which each side of the first region 10 extends. Wherein, the angular region 82 is a fan-shaped structure, and along the direction that the first region 10 points to the second region 20, the center of a circle of the fan-shaped structure is located between the first region 10 and the circular arc line of the fan-shaped structure, which specifically may be: the centre of the circle of the fan-shaped structure is the corner of the rectangular first area 10. Set up the angle region 82 into fan-shaped structure, fan-shaped structure is favorable to receiving the transmission of force and even stress when expanding, and fan-shaped structure's shape is more pleasing to the eye, more is favorable to being stretched the back and forms partial spherical structure, avoids the phenomenon such as turning to appear in the tensile display panel 100 that has the curved surface structure that forms to be favorable to improving the whole display effect of tensile display panel 100.

With reference to fig. 14, optionally, the elastic modulus of the angular region 82 gradually increases along the radius of the fan-shaped structure and along the direction in which the center of the fan-shaped structure points to the arc line of the fan-shaped structure.

Specifically, the second region 20 in the stretchable display panel 100 provided by the present application is a stretchable region, and the second region 20 includes a plurality of side regions 81 and a plurality of corner regions 82, for example, when the first region 10 is rectangular, the corner regions 82 are disposed outside corners of the first region 10 and between any two adjacent side regions 81, a central corner of the corner region 82 is a corner of the first region 10, and the side regions 81 are disposed along a direction in which each side of the first region 10 extends. The application provides a mode of setting up of angle region 82 elastic modulus does: along the radius of fan-shaped structure, and along the direction of the circular arc line of fan-shaped structure's centre of a circle point to fan-shaped structure, the elastic modulus of angle region 82 grow gradually, and the position tensile effect that the angle region 82 is closer to the centre of a circle is the better promptly. Because the area of the sector in the corner region 82 of the sector structure is smaller at the position close to the center of the sector, the stretching effect is better at the position close to the center of the sector in the corner region 82, which is favorable for stretching the diagonal region 82 when stretching the second region 20, so that the situation that the corner region 82 is broken when stretching the second region 20 is avoided, and the production yield of the stretchable display panel 100 is favorably improved.

Referring to fig. 15, which is a schematic view of the corner region in fig. 14 according to an embodiment of the present disclosure, referring to fig. 14 and 15, optionally, the corner region 82 includes a plurality of sector islands 821 sequentially arranged along an extension direction of a circular arc of the sector structure with a center of the sector structure as a center, and adjacent sector islands 821 are connected to each other through a stretchable bridge 825.

Specifically, the corner area 82 in the second area 20 of the stretchable display panel 100 provided by the present application is of a sector structure, and the corner area 82 may include a plurality of sector islands 821, specifically, the corner area 82 includes a plurality of sector islands 821 sequentially arranged along the extension direction of the circular arc line of the sector structure with the center of the sector structure as the center of the circle, or the corner area 82 includes a plurality of sector islands 821 sequentially arranged along the extension direction of the circular arc line of the sector structure, and any one of the sector islands 821 and the sector structure have the same center of the circle and the same radius; a stretchable bridge 825 is connected to any one of the sector islands 821, the stretchable bridge 825 is disposed between two adjacent sector islands 821, and the stretchable bridge 825 may be further disposed between the sector island 821 and the edge area 81 disposed adjacent thereto.

The corner region 82 is arranged to be the island bridge structure (the fan-shaped island 821 and the stretchable bridge 825) so that the corner region 82 can be stretched and deformed, when the second region 20 is stretched, the stretchable bridge 825 can be stretched in the direction in which the fan shape is opened, that is, stretching or shrinking of the corner region 82 can be realized through the change of the stretching amount of the stretchable bridge 825, the enforceability of the corner region 82 in stretching deformation is improved, the risk that the fan-shaped island 821 or other regions connected with the fan-shaped island 821 are stretched and broken can be avoided, and the manufacturing yield of the stretchable display panel 100 is improved. In addition, with the configuration of the present embodiment, the deformation path of the corner region 82 can be set to be constant, that is, the deformation that is likely to occur or is preferentially generated when the display panel 100 is stretched is designed to be deformed along the fanned out path. The design of the present embodiment provides a path for the stretching deformation of the display panel 100, so that the deformation after stretching is more controllable and more desirable.

Fig. 16 is another schematic view of the corner region in fig. 14 according to an embodiment of the present application, please refer to fig. 14 and 16, and optionally, the corner region 82 includes a plurality of island structures and a plurality of stretchable bridges 825 connecting the island structures, wherein the island structures are centered around the center of the sector structure and arranged along the radius direction of the sector structure;

the island structure comprises a sector island 822 and a sector annular island 823, the sector annular island 823 being located on a side of the sector island 822 remote from the first area 10.

Specifically, the corner regions 82 in the second region 20 of the stretchable display panel 100 provided by the present application are in a sector structure, the corner regions 82 include a plurality of island structures and a plurality of stretchable bridges 825, each island structure is connected with a stretchable bridge 825, the stretchable bridges 825 are disposed between two adjacent island structures, and the stretchable bridges 825 may also be disposed between an island structure and a corner region 82 disposed adjacent thereto. Any island structure located in the same corner region 82 is arranged in a divergent manner in the radial direction of the sector structure with the center of the corresponding sector structure as the center of the circle, the island structure includes a sector island 822 and a sector annular island 823, and the sector annular island 823 is located on one side of the sector island 822 far away from the first region 10. That is, the sector island 822 in the corner region 82 is circular around the center of the sector structure and is disposed along the radial direction of the sector structure, but the radius of the sector island 822 is smaller than that of the sector structure, and the sector island 822 is disposed on the side of the sector structure close to the center of the circle; sector annular island 823 also uses the centre of a circle of fan-shaped structure for circular, and sets up along the direction of radius of fan-shaped structure, and the circular arc line of keeping away from centre of a circle one side overlaps with the circular arc line of fan-shaped structure in the sector annular island 823, and the circular arc line that sector annular island 823 is close to centre of a circle one side is located one side that sector island 822 kept away from the centre of a circle.

The stretchable bridge 825 is disposed between the fan-shaped island 822 and the edge area 81 disposed adjacent to the fan-shaped island 822, and between the fan-shaped island 823 and the edge area 81 disposed adjacent to the fan-shaped island 823.

The corner region 82 is arranged to be the island bridge structure (the fan-shaped island 822 and the stretchable bridge 825) so that the corner region 82 can be stretched to deform, when the second region 20 is stretched, the stretchable bridge 825 can be stretched in the direction in which the fan shape is opened, that is, stretching or shrinking of the corner region 82 can be realized through the change of the stretching amount of the stretchable bridge 825, the enforceability of the corner region 82 in stretching deformation is improved, the risk that the fan-shaped island 822 or other regions connected with the fan-shaped island 822 are stretched and broken can be avoided, and the manufacturing yield of the stretchable display panel 100 is improved.

Fig. 17 is a schematic view of a region B in fig. 14 according to an embodiment of the present disclosure, and fig. 18 is a schematic view of a corner region in fig. 17 according to an embodiment of the present disclosure, please refer to fig. 14, 17 and 18, where alternatively, any one of the side regions 81 has a first elastic modulus along a first direction and a second elastic modulus along a second direction, and any one of the side regions 81 extends along the second direction, and the second direction is perpendicular to the first direction; wherein the first elastic modulus is less than the second elastic modulus.

Specifically, the stretchable display panel 100 provided by the present application includes a corner region 82 and a corner region 81 in the second region 20, the corner region 82 has a fan-shaped structure, wherein an edge where any one of the corner regions 81 and the corner region 82 are connected is a first edge 83, as shown in fig. 17, one edge region 81 and two corner regions 82 of a B region in fig. 14, only the one edge region 81 shown in fig. 17 is taken as an example, an extending direction of the first edge 83 is a first direction, and any one of the corner regions 81 has a first elastic modulus along the first direction; the direction in which any edge region 81 extends to the two side corner regions 82 is a second direction, or the extending direction of any edge region 81 along the edge of the first region 10 is a second direction, and any edge region 81 has a second elastic modulus along the second direction; wherein the second direction is perpendicular to the first direction, and the first elastic modulus of any edge region 81 in the display panel 100 is set to be smaller than the second elastic modulus; that is, the stretchability in the first direction of any one of the side regions 81 is greater than the stretchability in the second direction.

As shown in fig. 18, in the non-bent state of the stretchable display panel 100, the fan-shaped region (the corner region 82) is theoretically regarded as a non-quarter circle, specifically, a fan shape smaller than a quarter circle, that is, the central angle of the fan-shaped region is smaller than 90 degrees. Therefore, when the sector is spread out to 90 degrees as the bending and stretching of the corner region 82 of the sector, the side region 81, which originally had a length of Y1 in the first direction, reaches the longest length Y2 in the first direction, and at this time, the length of the side region 81 in the first direction is completely embodied in the first direction, that is, the entire sector is completely opened.

With the opening of the corner region 82 (i.e. the fan-shaped structure), the edge region 81 needs to be elongated in a direction extending along the first edge 83 (first direction), needs to provide some pulling force in a direction extending perpendicular to the first edge 83, whereas the corner region 82 cannot be pulled apart if the edge region 81 is too flexible in a direction extending perpendicular to the first edge 83, i.e. it is itself easier to be stretched than the corner region 82. Therefore, the elastic modulus of the edge region 81 in the extending direction of the first edge 83 is smaller than the elastic modulus of the edge region 81 in the extending direction perpendicular to the first edge 83, so that when the second region 20 is stretched, the position of the corner region 82 is opened, the good stretching effect of the corner region 82 is realized, the display panel 100 with a full-curved surface is formed, and the display effect is not affected.

It should be noted that fig. 17 only illustrates the edge region 81 located at the left side of the stretchable display panel 100 in fig. 14 and the two corner regions 82 located adjacent to the edge region, and the first direction and the second direction corresponding to this edge region 81 are as shown in fig. 17 and fig. 18, but do not represent the first direction and the second direction corresponding to the edge region 81 located at the upper side or the lower side of the stretchable display panel 100; the first direction corresponding to any edge region 81 is the extending direction of the first edge 83 where the edge region 81 is connected with the corner region 82, and the second direction is the direction perpendicular to the corresponding first direction, or the second direction is the extending direction of the edge region 81.

Fig. 19 is a schematic view of a display device according to an embodiment of the present invention, fig. 20 is a cross-sectional view of a CC 'of fig. 19 according to an embodiment of the present invention, fig. 21 is a cross-sectional view of another CC' of fig. 19 according to an embodiment of the present invention, and referring to fig. 19-21, based on the same inventive concept, a display device 200 is further provided, and the display device 200 includes a stretchable display panel 100. The stretchable display panel is any one of the stretchable display panels 100 provided herein.

The stretchable display panel 100 includes a display region 51 and a non-display region 52;

the display device 200 further comprises a cover glass 90, and the edges of the cover glass 90 are all of curved surface structures; the display area 51 of the stretchable display panel 100 located in the second region 20 is correspondingly attached to the curved surface structure.

Specifically, the present application provides a display device 200, including a cover glass 90, edges of the cover glass 90 are curved structures, the stretchable display panel 100 includes a display area 51 and a non-display area 52 surrounding the display area 51, the display area 51 in the second area 20 in the stretchable display panel 100 is correspondingly attached to the curved structures, and the display area 51 in the first area 10 in the stretchable display panel 100 is correspondingly attached to a central plane structure of the cover glass 90, so as to implement assembly between the stretchable display panel 100 and the cover glass 90 having the curved structures after being stretched.

It should be noted that, in the process of attaching the stretchable display panel 100 and the cover glass 90 to assemble the display device, the bonding between the stretchable display panel 100 and the cover glass 90 is realized by using a transparent adhesive, such as an Optical Clear Adhesive (OCA), a Pressure Sensitive Adhesive (PSA), and the like, and the influence on the display effect of the display device 200 can be avoided.

Referring to fig. 20 and 21, optionally, when the orthographic projection of the non-display area 52 on the light-emitting surface of the stretchable display panel 100 covers at least a portion of the second area 20 and the third area 30, a plane where at least a portion of the second area 20 and the third area 30 are located is parallel to a plane where the first area 10 is located; or at least part of the second region 20 and the third region 30 may lie in a plane perpendicular to the plane of the first region 10.

Specifically, referring to fig. 21, when the orthographic projection of the non-display area 52 on the light-emitting surface of the stretchable display panel 100 covers at least a portion of the second area 20 and the third area 30, the second area 20 and the third area 30 can be bent through the stretchable area in the second area 20, so that at least a portion of the second area 20 and at least a portion of the third area 30 can be bent to the back of the first area 10, and a plane where at least a portion of the second area 20 and at least a portion of the third area 30 are located is parallel to a plane where the first area 10 is located, so that the area of the frame area of the display panel 100 is reduced, the thickness of the display panel 100 can also be reduced, and the design of the display device 200 with a narrow frame and a thin thickness can be realized.

In addition, referring to fig. 20, after the second region 20 is stretched to form the stretchable display panel 100 with a full-curved structure, a state that a plane where at least a portion of the second region 20 and at least a portion of the third region 30 are located is perpendicular to a plane where the first region 10 is located is directly maintained, so that a manufacturing process of the display device is simplified, and the manufacturing efficiency of the display device 200 is improved.

Fig. 22 is a cross-sectional view of still another CC 'of fig. 19 according to an embodiment of the present application, and fig. 23 is a cross-sectional view of still another CC' of fig. 19 according to an embodiment of the present application, please refer to fig. 22-23, wherein optionally, the stretchable display panel 100 further includes a fourth region 40, and the fourth region 40 is a non-stretchable region;

when the orthographic projection of the non-display area 52 on the light-emitting surface of the stretchable display panel 100 covers the fourth area 40, the plane where at least part of the second area 20, at least part of the third area 30 and the fourth area 40 are located is parallel to the plane where the first area 10 is located; or, the plane in which at least part of the second region 20, at least part of the third region 30 and the fourth region 40 are located is perpendicular to the plane in which the first region 10 is located.

Specifically, referring to fig. 22, when the stretchable display panel 100 further includes the fourth region 40, the orthographic projection of the non-display region 52 on the light-emitting surface of the stretchable display panel 100 covers the fourth region 40, and at least a portion of the second region 20, at least a portion of the third region 30, and at least a portion of the fourth region 40 can be bent by the stretchable regions in the second region 20 and the third region 30, so that a plane where at least a portion of the second region 20, at least a portion of the third region 30, and at least a portion of the fourth region 40 are located is parallel to a plane where the first region 10 is located, thereby reducing an area of a frame region of the display panel 100, and reducing a thickness of the display panel 100, which is beneficial to realizing a design of a narrow frame and a thin thickness of the display device 200.

Referring to fig. 23, in addition, after the second region 20 and the third region 30 are stretched to form the stretchable display panel 100 with a full-curved structure, a state that a plane where at least a portion of the second region 20, at least a portion of the third region 30, and the fourth region 40 are located is perpendicular to a plane where the first region 10 is located is directly maintained, so that a manufacturing process of the display device 200 is simplified, and the manufacturing efficiency of the display device 200 is improved.

Fig. 24 is a flowchart illustrating an assembling method of a display device according to an embodiment of the present application, and referring to fig. 20 to fig. 24, based on the same inventive concept, the present application further provides an assembling method of a display device, where the assembling method is applied to a display device 200, and the display device is any one of the display devices 200 provided in the present application.

Wherein the glass cover plate 90 includes a flat region, and the curved structure surrounds the flat region;

the assembling method comprises the following steps:

101, performing pre-stretching on the second region 20 of the stretchable display panel 100 along the first region 10 towards the third region 30;

102, bonding the first region 10 of the stretchable display panel 100 with the flat region of the glass cover plate 90;

step 103, bonding the display area 51 in the second area 20 of the stretchable display panel 100 to the curved surface structure of the glass cover plate 90.

Specifically, the present application also provides an assembling method of a display device, wherein the glass cover plate 90 in the display device 100 comprises a flat area, and the curved surface structure in the glass cover plate 90 surrounds the flat area; when the stretchable display panel 100 includes only the first, second, and

third regions

10, 20, and 30, the assembling method specifically includes: the second region 20 of the stretchable display panel 100 is pre-stretched along the first region 10 towards the third region 30 through step 101, the first region 10 of the stretchable display panel 100 is bonded to the flat region of the glass cover plate 90 through step 102, the display region 51 of the stretchable display panel 100 located in the second region 10 is bonded to the curved structure of the glass cover plate 90 through step 103, and therefore the assembly of the stretchable display panel 100 and the glass cover plate 90 is achieved; the flat area and the curved surface structure correspond to the display area 51 of the stretchable display panel 100, which is beneficial to realizing the full-curved-surface display effect of the display device 200.

Fig. 25 is another flowchart of an assembly method of a display device according to an embodiment of the present application, please refer to fig. 20-23 and fig. 25, in which, alternatively, the orthographic projection of the non-display area 52 on the light-emitting surface of the stretchable display panel 100 covers at least a portion of the second area 20 and the third area 30;

the assembly method further comprises:

step 1041, bending at least a part of the second region 20 and the third region 30, so that a plane where the at least a part of the second region 20 and the third region 30 after bending is located is parallel to a plane where the first region 10 is located, and along a direction perpendicular to the plane where the first region 10 is located, orthographic projections of the at least a part of the second region 20 and the third region 30 after bending are located inside the first region 10; or at least part of the second region 20 and the third region 30 may lie in a plane perpendicular to the plane of the first region 10.

Specifically, when the orthographic projection of the non-display region 51 on the light emitting surface of the stretchable display panel 100 covers at least a portion of the second region 20 and the third region 30, the method for assembling the display device may further include step 1041 after the steps 101 to 103, bending at least a portion of the second region 20 and the third region 30 through the stretchable region in the second region 20, and positioning the orthographic projection of at least a portion of the second region 20 and the third region 30 after bending in a direction perpendicular to the plane of the first region 10 inside the first region 10, so that at least a portion of the second region 20 and at least a portion of the third region 30 may be bent to the back of the first region 10, so that the plane of at least a portion of the second region 20 and at least a portion of the third region 30 is parallel to the plane of the first region 10, thereby reducing the area of the frame region of the display panel 100, the thickness of the display panel 100 can be reduced, which is advantageous for the design of the display device 200 with a narrow frame and a thin profile.

Alternatively, after the second region 20 is stretched to form the stretchable display panel 100 having a fully curved structure, the state that the plane where at least a portion of the second region 20 and at least the third region 30 are located is perpendicular to the plane where the first region 10 is located is directly maintained, so that the manufacturing process of the display device is simplified, and the manufacturing efficiency of the display device 200 is improved.

Fig. 26 is a flowchart illustrating a method for assembling a display device according to an embodiment of the present application, referring to fig. 20-23 and fig. 26, optionally, the stretchable display panel 100 further includes a fourth region 40, the third region 30 is a stretchable region, and the fourth region 40 is a non-stretchable region;

the assembly method further comprises:

step 1011, performing a pre-stretch on the third region 30 of the stretchable display panel 100 along the first region 10 towards the fourth region 40;

step 1042, when the orthographic projection of the non-display area 52 on the light emitting surface of the stretchable display panel 100 covers the fourth area 40, bending at least a part of the second area 20, at least a part of the third area 30, and the fourth area 40, so that a plane where the bent at least a part of the second area 20, at least a part of the third area 30, and the fourth area 40 are located is parallel to a plane where the first area 10 is located, and along a direction perpendicular to the plane where the first area 10 is located, the orthographic projection of the bent at least a part of the second area 20, at least a part of the third area 30, and the fourth area 40 is located inside the first area 10; or, the plane of the at least part of the second region 20, the at least part of the third region 30 and the fourth region 40 is perpendicular to the plane of the first region 10.

Specifically, when the stretchable display panel further includes a fourth region, the third region is a stretchable region, and the fourth region is a non-stretchable region, the assembly method of the display device provided in the present application further includes pre-stretching the second region of the stretchable display panel along the first region toward the third region in step 101, and pre-stretching the third region of the stretchable display panel along the first region toward the fourth region in step 1011, and then bending at least a portion of the second region 20, at least a portion of the third region 30, and the fourth region 40 through the stretchable region in the second region 20 and the third region 30 in step 1042 after steps 102 and 103, so that a plane in which at least a portion of the second region 20, at least a portion of the third region 30, and the fourth region 40 are located is parallel to a plane in which the first region 10 is located, and is along a direction perpendicular to the plane in which the first region 10 is located, the orthographic projection of at least part of the second region 20, at least part of the third region 30 and the fourth region 40 after bending is located inside the first region, so that the area of the frame region of the display panel 100 is reduced, the thickness of the display panel 100 can also be reduced, and the design of narrowing the frame and thinning the display device 200 is facilitated.

In addition, after the second region 20 and the third region 30 are stretched to form the stretchable display panel 100 with a full-curved structure, the state that the plane where at least part of the second region 20, at least part of the third region 30, and the fourth region 40 is located is perpendicular to the plane where the first region 10 is located is directly maintained, so that the manufacturing process of the display device 200 is simplified, and the manufacturing efficiency of the display device 200 is improved.

It should be noted that, for the embodiments of the display device provided in the embodiments of the present application, reference may be made to the embodiments of the display panel described above, and repeated descriptions are omitted. The display device provided by the application can be: any product and component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a vehicle-mounted display screen, a navigator and the like.

As can be seen from the above embodiments, the stretchable display panel, the display device and the assembling method thereof provided by the present invention at least achieve the following beneficial effects:

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A stretchable display panel, comprising a first region, a second region, and a third region, wherein the second region surrounds the first region in a closed manner, and the third region surrounds the second region in a non-closed manner;

wherein the first region is a non-stretchable region; the second region is a stretchable region; the third region is a non-stretchable region or a stretchable region less stretchable than the second region;

at least one concave part is formed by the second area being concave towards the inside of the first area, and at least part of the third area in the orthographic projection of the light-emitting surface of the stretchable display panel is located in the orthographic projection range of the concave part on the light-emitting surface.

2. The stretchable display panel of claim 1, wherein an orthographic projection of the third region on the light exit surface and an orthographic projection of the recess on the light exit surface coincide.

3. The stretchable display panel of claim 2, further comprising a fourth region that non-closely surrounds the second region and the third region;

wherein the third region is a stretchable region and the fourth region is a non-stretchable region.

4. The stretchable display panel according to claim 3, wherein the stretchable display panel comprises a display area and a non-display area, wherein an orthographic projection of the display area on the light exit surface covers the first area, at least a portion of the second area and the third area, and an orthographic projection of the non-display area on the light exit surface covers at least a portion of the second area and the fourth area;

the display area in the second area closely surrounds the first area, and the non-display area in the second area closely surrounds the display area in the second area.

5. The stretchable display panel of claim 1, further comprising a transition region disposed between a non-stretchable region and a stretchable region; the transition zone has an elastic modulus that lies between the elastic modulus of the non-stretchable region and the elastic modulus of the stretchable region.

6. The stretchable display panel according to claim 1, wherein the stretchable display panel comprises a display area and a non-display area, and an orthographic projection of the display area on a light emitting surface of the stretchable display panel covers the first area and at least a part of the second area; the orthographic projection of the non-display area on the light emergent surface covers at least part of the second area and at least part of the third area;

7. The stretchable display panel of claim 6, wherein the display panel further comprises a plurality of sub-pixel units arranged in the display area, and the second region comprises a bent state and a non-bent state, and in the non-bent state:

the arrangement density of the sub-pixel units in the second area is greater than or equal to that of the sub-pixel units in the first area.

8. The stretchable display panel of claim 6, wherein the display panel further comprises a plurality of sub-pixel units arranged in the display area, and the second region comprises a bent state and a non-bent state, and in the non-bent state:

the size of the sub-pixel unit in the second area is larger than or equal to the size of the sub-pixel unit in the first area.

9. The stretchable display panel according to claim 6, wherein an orthographic projection of the display region on the light emitting surface further covers at least a portion of the third region, a side edge of the second region away from the first region is recessed towards the inside of the first region to form at least one recess, at least a portion of the orthographic projection of the third region on the light emitting surface is located within an orthographic projection range of the recess on the light emitting surface, and the orthographic projection of the display region on the light emitting surface in the third region and the orthographic projection of the recess on the light emitting surface coincide.

10. The stretchable display panel of claim 9, wherein the display panel further comprises a plurality of sub-pixel units arranged in the display region, and the second region comprises a bent state and a non-bent state, and in the non-bent state:

the arrangement density of the sub-pixel units in the third region is greater than or equal to the arrangement density of the sub-pixel units in the first region and less than or equal to the arrangement density of the sub-pixel units in the second region.

11. The stretchable display panel of claim 9, wherein the display panel further comprises a plurality of sub-pixel units arranged in the display region, and the second region comprises a bent state and a non-bent state, and in the non-bent state:

the size of the sub-pixel unit in the third area is larger than or equal to the size of the sub-pixel unit in the first area and smaller than or equal to the size of the sub-pixel unit in the second area.

12. The stretchable display panel of claim 1, wherein the second region comprises a plurality of edge regions and a plurality of corner regions, the corner regions connecting two adjacent edge regions;

the modulus of elasticity of the corner regions is less than the modulus of elasticity of the edge regions.

13. The stretchable display panel of claim 1, wherein the second region comprises a plurality of edge regions and a plurality of corner regions, the corner regions connecting two adjacent edge regions; the angle area is of a fan-shaped structure, the direction of the first area pointing to the second area is along, and the circle center of the fan-shaped structure is located between the first area and the arc line of the fan-shaped structure.

14. The stretchable display panel of claim 13, wherein the elastic modulus of the corner region gradually increases along the radius of the fan-shaped structure and along the direction of the center of the fan-shaped structure pointing to the arc line of the fan-shaped structure.

15. The stretchable display panel according to claim 13, wherein the corner region comprises a plurality of sector islands sequentially arranged along the extension direction of the circular arc line of the sector structure with the center of the sector structure as the center, and adjacent sector islands are connected to each other by a stretchable bridge.

16. The stretchable display panel according to claim 13, wherein the corner region comprises a plurality of island structures and a plurality of stretchable bridges connecting the island structures, the island structures being centered at a center of the sector structure and arranged along a radius direction of the sector structure;

the island structure comprises a fan-shaped island and a fan-shaped annular island, wherein the fan-shaped annular island is positioned on one side, far away from the first area, of the fan-shaped island.

17. The stretchable display panel of claim 13, wherein any of the edge regions has a first elastic modulus in a first direction and a second elastic modulus in a second direction, and wherein any of the edge regions extends in the second direction, the second direction being perpendicular to the first direction; wherein the first elastic modulus is less than the second elastic modulus.

18. A display device, characterized in that the display device comprises a stretchable display panel according to any one of claims 1 to 17, the stretchable display panel comprising a display region and a non-display region;

19. The display device according to claim 18, wherein when the orthographic projection of the non-display area on the light-emitting surface of the stretchable display panel covers at least part of the second area and the third area, a plane on which at least part of the second area and the third area are located is parallel to a plane on which the first area is located; or at least part of the plane where the second area and the third area are located is perpendicular to the plane where the first area is located.

20. The display device according to claim 18, wherein the stretchable display panel further comprises a fourth region, the fourth region being a non-stretchable region;

when the orthographic projection of the non-display area on the light-emitting surface of the stretchable display panel covers the fourth area, the plane where at least part of the second area, at least part of the third area and the fourth area are located is parallel to the plane where the first area is located; or the plane where at least part of the second region, at least part of the third region and the fourth region are located is perpendicular to the plane where the first region is located.

21. A method of assembling a display device, for use in a display device as claimed in any one of claims 18 to 20; the glass cover plate comprises a flat area, and a curved surface structure surrounds the flat area;

the assembling method comprises the following steps:

22. The method of assembling a display device according to claim 21, wherein the orthographic projection of the non-display area on the light-emitting surface of the stretchable display panel covers at least a portion of the second area and the third area, the method further comprising:

bending at least part of the second area and the third area, so that the plane where the at least part of the second area and the third area are located after bending is parallel to the plane where the first area is located, and along the direction perpendicular to the plane where the first area is located, the orthographic projection of the at least part of the second area and the third area after bending is located inside the first area; or at least part of the plane where the second area and the third area are located is perpendicular to the plane where the first area is located.

23. The method of assembling a display device according to claim 21, wherein the stretchable display panel further comprises a fourth region, the third region being a stretchable region, the fourth region being a non-stretchable region;

the assembly method further comprises:

pre-stretching a third region of the stretchable display panel along the first region toward the fourth region;

when the orthographic projection of the non-display area on the light-emitting surface of the stretchable display panel covers the fourth area, bending at least a part of the second area, at least a part of the third area and the fourth area, enabling the plane where the bent at least a part of the second area, the bent at least a part of the third area and the bent fourth area are located to be parallel to the plane where the first area is located, and enabling the orthographic projection of the bent at least a part of the second area, the bent at least a part of the third area and the bent fourth area to be located inside the first area along the direction perpendicular to the plane where the first area is located; or the plane where at least part of the second region, at least part of the third region and the fourth region are located is perpendicular to the plane where the first region is located.