Display panel and display module

Abstract

The invention provides a display panel and a display module. The display panel comprises a main body part and at least one stretching part, the at least one stretching part is located on the peripheral side of the main body part, the stretching part can be stretched in the stretching direction and contracted in the contraction direction, and the stretching part comprises a non-pixel area provided with a plurality of positive Poisson's ratio holes, and the positive Poisson's ratio holes penetrate through the non-pixel area in the thickness direction of the stretching part; the plurality of pixel regions are arranged at intervals through the non-pixel regions; the non-pixel area and the pixel area extend in the stretching direction, and in the stretching direction, the Poisson's ratio of the stretching part is larger than the Poisson's ratio of the main body part. According to the display panel, the risk that wrinkles appear at the corner position of the display screen with at least one arc angle formed by attaching the display panel can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display module. Background Art

[0002] As users have higher and higher requirements for the effective display area of ​​​​the display screen, in order to obtain a larger screen-to-body ratio, the current mainstream technical direction is to bend the four sides of the display panel to visually achieve a full screen.

[0003] However, the display panel in the related art cannot achieve a true four-curved display effect. Summary of the invention

[0004] In view of the above problems, the present application provides a display panel and a display module, which can effectively reduce the risk of wrinkles appearing at the corners of a display screen having at least one arc angle formed by bonding display panels.

[0005] In the first aspect, an embodiment of the present application provides a display panel, which includes a main body and at least one stretching portion, wherein the at least one stretching portion is located on the peripheral side of the main body, and the stretching portion can be stretched in a stretching direction and contracted in a contraction direction, and the stretching portion includes: a non-pixel area, which is provided with a plurality of positive Poisson's ratio holes, each positive Poisson's ratio hole penetrates the non-pixel area along the thickness direction of the stretching portion; a plurality of pixel areas, which are arranged at intervals through the non-pixel areas; the non-pixel areas and the pixel areas both extend along the stretching direction, and in the stretching direction, the Poisson's ratio of the stretching portion is greater than the Poisson's ratio of the main body.

[0006] In some embodiments of the first aspect, along the stretching direction, a Poisson's ratio of a side of the stretching portion close to the main body portion is smaller than a Poisson's ratio of a side of the stretching portion far from the main body portion.

[0007] In some embodiments of the first aspect, the Poisson's ratio of the stretching portion gradually increases along the stretching direction.

[0008] In some embodiments of the first aspect, along the contraction direction, the Poisson's ratio of the stretching portion first gradually increases and then gradually decreases.

[0009] In some embodiments of the first aspect, along the stretching direction, the proportion of the opening area of ​​the plurality of positive Poisson's ratio holes on the stretching portion gradually increases.

[0010] In some embodiments of the first aspect, along the contraction direction, the proportion of the opening area of ​​the plurality of positive Poisson's ratio holes on the stretching portion first gradually increases and then gradually decreases.

[0011] In some embodiments of the first aspect, the plurality of positive Poisson's ratio holes accounts for an open area of ​​the stretch portion in a range of 10% to 50%.

[0012] In some embodiments of the first aspect, each positive Poisson's ratio hole has the same shape.

[0013] In some embodiments of the first aspect, among two adjacent positive Poisson's ratio holes in the stretching direction, the opening area of ​​the positive Poisson's ratio hole close to the main body is smaller than the opening area of ​​the positive Poisson's ratio hole far from the main body.

[0014] In some embodiments of the first aspect, a length of the positive Poisson's ratio hole in the stretching direction is not less than a length in the shrinking direction.

[0015] In some embodiments of the first aspect, the orthographic projection of the positive Poisson's ratio hole in the thickness direction is a quadrilateral, and the quadrilateral has a first diagonal and a second diagonal intersecting each other, and the first diagonal is parallel to the stretching direction.

[0016] In some embodiments of the first aspect, the first diagonal line is perpendicular to the second diagonal line.

[0017] In some embodiments of the first aspect, the first diagonal line and the second diagonal line are symmetry axes of each other.

[0018] In some embodiments of the first aspect, the stretching portion is axially symmetrically arranged, and the stretching direction is parallel to the symmetry axis of the stretching portion.

[0019] In some embodiments of the first aspect, the plurality of pixel regions are distributed in an array in the stretching direction and the contraction direction.

[0020] In some embodiments of the first aspect, the plurality of positive Poisson's ratio holes are distributed in an array in the stretching direction and the contraction direction.

[0021] In some embodiments of the first aspect, in the contraction direction, the plurality of positive Poisson's ratio holes are staggered with the plurality of pixel regions.

[0022] In some embodiments of the first aspect, along the stretching direction, the stretching portion includes a first stretching sub-portion, a second stretching sub-portion, and a third stretching sub-portion arranged in sequence; along the stretching direction, the distance between adjacent positive Poisson's ratio holes located in the first stretching sub-portion is greater than the distance between adjacent positive Poisson's ratio holes located in the second stretching sub-portion, and the distance between adjacent positive Poisson's ratio holes located in the second stretching sub-portion is greater than the distance between adjacent positive Poisson's ratio holes located in the third stretching sub-portion.

[0023] In some embodiments of the first aspect, the shapes of the multiple positive Poisson's ratio holes are the same, and the opening area of ​​the positive Poisson's ratio holes located in the first stretching sub-section is smaller than the opening area of ​​the positive Poisson's ratio holes located in the second stretching sub-section, and the opening area of ​​the positive Poisson's ratio holes located in the second stretching sub-section is smaller than the opening area of ​​the positive Poisson's ratio holes located in the third stretching sub-section.

[0024] In some embodiments of the first aspect, adjacent positive Poisson's ratio holes in the third stretching sub-portion are connected to each other along the stretching direction.

[0025] In some embodiments of the first aspect, the shape and area of ​​each positive Poisson's ratio hole are the same, and the opening density of the positive Poisson's ratio holes located in the first stretching sub-section is smaller than the opening density of the positive Poisson's ratio holes located in the second stretching sub-section, and the opening density of the positive Poisson's ratio holes located in the second stretching sub-section is smaller than the opening density of the positive Poisson's ratio holes located in the third stretching sub-section.

[0026] In some embodiments of the first aspect, the display panel includes a flexible substrate, a light-emitting functional layer and an encapsulation layer stacked in sequence, the positive Poisson's ratio hole includes a first hole formed on the flexible substrate, a second hole formed on the light-emitting functional layer and a third hole formed on the encapsulation layer, and the second hole connects the first hole and the third hole; or, the display panel includes a flexible substrate, a driving circuit layer, a light-emitting functional layer and an encapsulation layer stacked in sequence, the positive Poisson's ratio hole includes a first hole formed on the flexible substrate, a second hole formed on the light-emitting functional layer, a third hole formed on the encapsulation layer and a fourth hole formed on the driving circuit layer, the fourth hole connects the first hole with the second hole, and the second hole with the third hole.

[0027] In some embodiments of the first aspect, the display panel also includes a first portion provided on one side of the first direction of the main body and a second portion provided on one side of the second direction of the main body, the first portion and the second portion being connected via a stretching portion; the stretching portion having: a first area connected to the first portion; a second area connected to the second portion, and the second area and the first area are spaced apart along the contraction direction; a third area connecting the first area and the second area; wherein the first portion and the first area are used to form a first single curved surface, the second area and the second portion are used to form a second single curved surface, and the third area is used to form a hyperbolic surface.

[0028] In a second aspect, the present application provides a display module, comprising a display screen having at least one arc angle formed by bonding the display panels provided by any embodiment of the first aspect.

[0029] In some embodiments of the second aspect, the display module also includes: a supporting film, connected to the display screen via a first optical adhesive; a polarizer, connected to the side of the display screen away from the supporting film via a second optical adhesive; an optical adhesive layer, connected to the side of the polarizer away from the display screen; and a cover plate, connected to the side of the optical adhesive layer away from the polarizer.

[0030] In some embodiments of the second aspect, the stretching resilience of the first optical adhesive is 30% to 50%, and each positive Poisson's ratio hole is filled with the first optical adhesive.

[0031] In some embodiments of the second aspect, the stretching resilience of the second optical adhesive is 30% to 50%, and each positive Poisson's ratio hole is filled with the second optical adhesive.

[0032] In some embodiments of the second aspect, the stretching resilience of the optical adhesive layer is 30% to 50%.

[0033] In the display panel of the present application, a plurality of positive Poisson's ratio holes are arranged on the non-pixel area of ​​the stretching portion, and in the stretching direction, the Poisson's ratio of the stretching portion is greater than that of the main portion, so that the Poisson's ratio of the stretching portion of the present application is increased relative to the Poisson's ratio of the stretching portion in the related art, so that during the stretching of the stretching portion along the stretching direction, the stretching portion is more likely to shrink in the contraction direction. Therefore, the risk of wrinkles in the corners of the display screen formed by bonding the display panel due to the extrusion force from the contraction direction during the stretching process can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0035] Figure 1 A top view of a display panel provided by an embodiment of the first aspect of the present application;

[0036] Figure 2 for Figure 1 An enlarged view of portion A in the display panel shown;

[0037] Figure 3 for Figure 2 An enlarged view of the first stretching subsection in section A shown;

[0038] Figure 4 for Figure 2 An enlarged view of the second stretching subsection in section A shown;

[0039] Figure 5 for Figure 2 An enlarged view of the third stretching subsection in section A shown;

[0040] Figure 6 for Figure 5 A cross-sectional view of the third stretching sub-portion along the EE direction is shown;

[0041] Figure 7 A cross-sectional view of a third stretching sub-portion in a display panel along the EE direction provided in some other embodiments of the first aspect of the present application;

[0042] Figure 8 for Figure 1 A three-dimensional image of a display screen formed by bonding the display panels shown;

[0043] Fig. 9 A cross-sectional view of a planar portion of a display module provided by an embodiment of the second aspect of the present application;

[0044] Fig.10 A partial structural diagram of a cross-sectional view of a curved surface portion of a display module provided by an embodiment of the second aspect of the present application;

[0045] The reference numerals in the specific implementation manner are as follows:

[0046] 1. Support film;

[0047] 3. Display panel; 30. Main body; 31. First part; 32. Second part; 33. Stretching part; B. First stretching sub-part; C. Second stretching sub-part; D. Third stretching sub-part; 331. Non-pixel area; 333. Pixel area; 335. First area; 337. Second area; 339. Third area; 34. Poisson's ratio hole; 341. First hole; 343. Second hole; 345. Third hole; 347. Fourth hole; 348. Fifth hole ; 349, sixth hole; 34A, first diagonal line; 34B, second diagonal line; 35, flexible substrate; 36, driving circuit layer; 37, light-emitting function layer; 371, pixel definition layer; 372, pixel opening; 373, pixel unit; 374, anode; 375, light-emitting layer; 376, cathode layer; 379, sub-pixel; 39, encapsulation layer; 301, first single curved surface; 302, second single curved surface; 303, hyperbolic surface 303;

[0048] 4. First optical adhesive; 5. Polarizer; 6. Second optical adhesive; 7. Optical adhesive layer; 8. Cover plate;

[0049] X, stretching direction; H, shrinking direction; Y, first direction; Z, second direction; T, thickness direction; O, symmetry axis. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0052] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0053] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0055] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0056] The term "plurality" used in the present application refers to two or more (including two).

[0057] In the present application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; meanwhile, "vertical" includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0058] As users have higher and higher requirements for the effective display area of ​​​​the display screen, in order to obtain a larger screen-to-body ratio, the current mainstream technical direction is to bend the four sides of the display panel to visually achieve a full screen.

[0059] The display module in the related art uses a highly fluid optical adhesive material to form an optical adhesive layer and a micro-curved design to achieve a micro-curved display effect. However, the display panel of such a display module not only causes wrinkles at the corners during the four-curved surface bonding process, but also fails to achieve an ideal deep four-curved state, and thus fails to achieve a true four-curved display effect.

[0060] In order to solve the above technical problems, this application is proposed. In order to better understand this application, Figures 1 to 10 The display panel and display module according to the embodiment of the present application are described in detail. Among them, the display panel 3 is used to be directly or indirectly bonded to the cover plate 8, the cover plate 8 is a four-curved cover plate, the cover plate 8 is provided with single curved surfaces on both sides of the first direction and the second direction, and the cover plate is also provided with a special-shaped surface connecting two adjacent single curved surfaces, and the display panel 3 is bonded to the cover plate 8 to form a display screen.

[0061] Please refer to Figures 1 to 8 , Figure 1 A top view of a display panel provided by an embodiment of the first aspect of the present application; Figure 2 for Figure 1 An enlarged view of portion A in the display panel shown; Figure 3 for Figure 2 An enlarged view of the first stretching subsection in section A shown; Figure 4 for Figure 2 An enlarged view of the second stretching subsection in section A shown; Figure 5 for Figure 2 An enlarged view of the third stretching subsection in section A shown;

[0062] Figure 6 for Figure 5 A cross-sectional view of the third stretching sub-portion along the EE direction is shown; Figure 7 A cross-sectional view of a third stretching sub-portion in a display panel along the EE direction provided in some other embodiments of the first aspect of the present application; Figure 8 for Figure 1 The three-dimensional diagram of the display screen formed by bonding the display panels shown in FIG.

[0063] like Figure 1As shown, an embodiment of the first aspect of the present application provides a display panel 3, which includes a main body portion 30 and at least one stretching portion 33, at least one stretching portion 33 is located on the peripheral side of the main body portion 30, and the stretching portion 33 can be stretched in a stretching direction X and contracted in a contraction direction H.

[0064] Specifically, when the display panel 3 and the cover plate 8 are attached to form a display screen having at least one arc angle, the stretching portion 33 is at least stressed in the stretching direction X and stretches in the stretching direction X and shrinks in the shrinking direction H.

[0065] In some embodiments, the display panel 3 further includes a first portion 31 disposed on one side of the first direction Y of the main body 30 and a second portion 32 disposed on one side of the second direction Z of the main body 30, and the first portion 31 and the second portion 32 are connected via a stretching portion 33. The stretching direction X is located between the first direction Y and the second direction Z, that is, the angle between the first direction Y and the second direction Z is equal to the sum of the angle between the stretching direction X and the first direction Y and the angle between the stretching direction X and the second direction Z.

[0066] Optionally, the main body 30 is substantially rectangular, the first direction Y is the long axis direction of the main body 30 , and the second direction Z is the short axis direction of the main body 30 . That is, the first direction Y is perpendicular to the second direction Z.

[0067] Optionally, the stretching direction X intersects the first direction Y and the second direction Z respectively, and the shrinking direction H intersects the first direction Y and the second direction Z respectively.

[0068] like Figures 2 to 5 As shown, the stretching portion 33 includes a non-pixel area 331 and a plurality of pixel areas 333 , and the plurality of pixel areas 333 are arranged at intervals through the non-pixel area 331 .

[0069] Continue reading Figure 6 and Figure 7 The non-pixel region 331 is provided with a plurality of positive Poisson's ratio holes 34 , and each positive Poisson's ratio hole 34 penetrates the non-pixel region 331 along the thickness direction T of the stretching portion 33 .

[0070] The non-pixel region 331 and the plurality of pixel regions 333 are both extended along the stretching direction X, and in the stretching direction X, the Poisson's ratio of the stretching portion 33 is greater than the Poisson's ratio of the main body portion 30 .

[0071] In the display panel 3 of the present application, a plurality of positive Poisson's ratio holes 34 are provided on the non-pixel region 331 of the stretching portion 33, and in the stretching direction X, the Poisson's ratio of the stretching portion 33 is greater than the Poisson's ratio of the main body portion 30, so that the Poisson's ratio of the stretching portion 33 of the present application is increased relative to the Poisson's ratio of the stretching portion in the related art, so that during the stretching of the stretching portion 33 along the stretching direction X, the stretching portion 33 is more likely to shrink in the shrinking direction H, thereby effectively reducing the risk of wrinkles in the corners of the display screen formed by the display panel 3 and the cover plate being bonded together due to the squeezing force from the shrinking direction H during the stretching process of the stretching portion 33.

[0072] Optionally, the non-pixel area 331 is a non-luminous display area on the stretching portion 33, that is, the non-pixel area 331 does not have a pixel unit of the display panel 3; multiple pixel areas 333 are luminous display areas on the stretching portion 33, and each pixel area 333 has a pixel unit 373 of the display panel 3, and each pixel unit 373 has a sub-pixel 379 or multiple sub-pixels 379 with different luminous colors, and the sub-pixel 379 is used for luminous display. Among them, the size and number of pixel areas 333 will affect the resolution and clarity of the image displayed by the stretching portion 33. Generally speaking, the smaller the pixel area 333 is and the more the number is, the higher the resolution of the image is, and more details and color information can be captured.

[0073] Exemplarily, each pixel unit 373 includes three sub-pixels 379 , and the three sub-pixels 379 are respectively a red sub-pixel, a green sub-pixel, and a blue sub-pixel.

[0074] In some embodiments, along the stretching direction X, the Poisson's ratio of the stretching portion 33 close to the main body 30 is smaller than the Poisson's ratio of the stretching portion 33 away from the main body 30. That is, along the stretching direction X, the plurality of positive Poisson's ratio holes 34 make the Poisson's ratio of the stretching portion 33 tend to increase. On the one hand, the display panel 3 can meet the non-zero Gaussian bonding requirements. On the other hand, during the bonding process between the display panel 3 and the cover plate 8, the farther the stretching portion 33 is from the main body 30 along the stretching direction X, the greater the shrinkage deformation in the shrinkage direction H. Therefore, the display panel 3 can be wrinkle-free at the corresponding position of the special-shaped surface of the cover plate to meet the bonding requirements.

[0075] In some optional embodiments, the Poisson's ratio of the stretching portion 33 gradually increases along the stretching direction X. The gradually increasing Poisson's ratio of the stretching portion 33 is more conducive to making the corners of the display panel 3 have non-zero Gaussian curvature, that is, meeting the requirement of curved surface lamination without wrinkles.

[0076] In some optional embodiments, the Poisson's ratio of the stretching portion 33 gradually increases and then gradually decreases along the contraction direction H. On the one hand, it can effectively avoid the stretching portion 33 from generating excessive tensile deformation and contraction deformation near the first portion 31 and the second portion 32, and on the other hand, it can avoid making a special shape design for the appearance characteristics of the stretching portion 33 to meet the tensile deformation and contraction deformation of the stretching portion 33 near the first portion 31 and the second portion 32, thereby making the appearance characteristics of the display panel 3 simpler, thereby facilitating the molding of the display panel 3.

[0077] Optionally, the shape of the positive Poisson's ratio hole 34 or / and the ratio of the opening area of ​​the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 may affect the Poisson's ratio of the stretching portion 33 in the stretching direction X. Specifically, different shapes of the positive Poisson's ratio holes 34 may lead to different increases in the Poisson's ratio of the stretching portion 33 in the stretching direction X; and the ratio of the opening area of ​​the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 may lead to different increases in the Poisson's ratio of the stretching portion 33 in the stretching direction X and different increases in the trends.

[0078] In some optional embodiments, along the stretching direction X, the opening area ratio of the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 gradually increases. The larger the opening area ratio of the plurality of positive Poisson's ratio holes 34 is, the more the Poisson's ratio of the stretching portion 33 increases. Therefore, along the stretching direction X, the opening area ratio of the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 gradually increases, which can gradually increase the Poisson's ratio of the stretching portion 33 in the stretching direction X, that is, the size and distribution of the positive Poisson's ratio holes 34 can gradually increase the Poisson's ratio of the stretching portion 33.

[0079] The ratio of the opening area of ​​the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 refers to the ratio of the sum of the areas of the plurality of positive Poisson's ratio holes 34 within a unit area of ​​the stretching portion 33 to the unit area.

[0080] More specifically, the gradually increasing proportion of the opening area of ​​the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 means that along the stretching direction X, the further the stretching portion 33 is from the main body 30, the greater the sum of the opening areas of the plurality of positive Poisson's ratio holes 34 per unit area. Figures 2 to 5 As shown, Figure 3 The first stretching sub-section B shown, Figure 4 The second stretching sub-section C and Figure 5 The third stretching subsection D shown is arranged along the stretching direction X, wherein the opening area of ​​the positive Poisson's ratio holes 34 in the first stretching subsection B is less than the opening area of ​​the positive Poisson's ratio holes 34 in the second stretching subsection C and less than the opening area of ​​the positive Poisson's ratio holes 34 in the third stretching subsection D.

[0081] In some optional embodiments, along the contraction direction H, the opening area ratio of the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 first gradually increases and then gradually decreases.

[0082] In these optional embodiments, the opening area of ​​the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 accounts for 10% to 50%. The opening area of ​​the plurality of positive Poisson's ratio holes 34 accounts for 10% to 50% in the range of 10% to 50% so that the display panels can be laminated to form a deep four-curved display screen.

[0083] Optionally, along the stretching direction X, the opening area ratio of the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 gradually increases within a range of 10% to 50%.

[0084] Optionally, along the contraction direction H, the opening area of ​​the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 first gradually increases and then gradually decreases within a range of 10% to 50%.

[0085] In some embodiments, each positive Poisson's ratio hole 34 has the same shape. Compared with changing the shape of the positive Poisson's ratio hole 34 to change the Poisson's ratio of the stretching portion 33, changing the opening area ratio of multiple positive Poisson's ratio holes 34 of the same shape not only makes it easier to design the change trend of the Poisson's ratio of the stretching portion 33, but also facilitates the molding of multiple positive Poisson's ratio holes 34.

[0086] Optionally, the orthographic projection of the positive Poisson's ratio hole 34 along the thickness direction T may be a quadrilateral, a circle, an ellipse, or the like.

[0087] like Figures 3 to 5 As shown, in some embodiments, among two adjacent positive Poisson's ratio holes 34 in the stretching direction X, the opening area of ​​the positive Poisson's ratio hole 34 close to the main body 30 is smaller than the opening area of ​​the positive Poisson's ratio hole 34 far from the main body 30 .

[0088] like Figures 3 to 5 As shown, in some embodiments, the length of the positive Poisson's ratio hole 34 in the stretching direction X is not less than the length in the contraction direction H.

[0089] Exemplarily, the length of the positive Poisson's ratio hole 34 in the stretching direction X is greater than the length in the contracting direction H.

[0090] like Figures 3 to 5 As shown, in some embodiments, the positive Poisson's ratio hole 34 has an orthographic projection in the thickness direction T of a quadrilateral, and the quadrilateral has a first diagonal line 34A and a second diagonal line 34B intersecting each other, and the first diagonal line 34A is parallel to the stretching direction X. The quadrilateral has instability, so the quadrilateral positive Poisson's ratio hole 34 makes it easier for the stretching portion 33 to shrink in the shrinking direction H when being stretched along the stretching direction X.

[0091] In some embodiments, the first diagonal line 34A is perpendicular to the second diagonal line 34B. That is, the positive Poisson's ratio hole 34 is at least symmetrical about one of the first diagonal line 34A and the second diagonal line 34B. Therefore, compared with some positive Poisson's ratio holes of other shapes, the quadrilateral positive Poisson's ratio hole 34 is more conducive to the stretching of the stretching portion 33 along the stretching direction X and the contraction along the contraction direction H.

[0092] In some embodiments, the first diagonal line 34A and the second diagonal line 34B are mutually symmetric axes, that is, the positive Poisson's ratio hole 34 is a rhombus.

[0093] In some embodiments, the stretching portion 33 is axially symmetrical, and the stretching direction X is parallel to the symmetry axis O of the stretching portion 33. The stretching direction X is parallel to the symmetry axis O of the stretching portion 33, which is beneficial for lamination on the one hand, and for designing the distribution of multiple positive Poisson's ratio holes 34 on the other hand.

[0094] like Figures 3 to 5 As shown, in some embodiments, the plurality of pixel regions 333 are distributed in an array in the stretching direction X and the contraction direction H.

[0095] Optionally, the contraction direction H is the row direction, and the stretching direction X is the column direction. Under the condition that the size and number of the pixel areas 333 are the same, compared with the multiple pixel areas 333 being arranged in an array in the first direction Y and the second direction Z, the multiple pixel areas 333 are arranged in an array in the stretching direction X and the contraction direction H, so that the non-pixel area 331 has a larger area between two adjacent columns of pixel areas 333 to set the positive Poisson's ratio hole 34.

[0096] like Figures 3 to 5 As shown, in some embodiments, a plurality of positive Poisson's ratio holes 34 are distributed in an array in the stretching direction X and the shrinking direction H. The plurality of positive Poisson's ratio holes 34 distributed in an array in the stretching direction X and the shrinking direction H are more conducive to the stretching portion 33 to stretch in the stretching direction X and shrink in the shrinking direction H.

[0097] like Figures 3 to 5 As shown, in some embodiments, in the contraction direction H, the plurality of positive Poisson's ratio holes 34 and the plurality of pixel regions 333 are arranged in a staggered manner.

[0098] The multiple positive Poisson's ratio holes 34 and the multiple pixel areas 333 are arranged in a staggered manner, which means that the multiple positive Poisson's ratio holes 34 in each column are arranged between the multiple pixel areas 333 in two adjacent columns. The multiple positive Poisson's ratio holes 34 and the multiple pixel areas 333 are arranged in a staggered manner. On the one hand, it can further facilitate the stretching of the stretching part 33 in the stretching direction X and the contraction in the contraction direction H. On the other hand, it can reduce the deformation of each pixel area 333 caused by the stretching and contraction of the stretching part 33, thereby reducing the deformation of the displayed image caused by the deformation of each pixel area 333. At the same time, since the multiple positive Poisson's ratio holes 34 and the multiple pixel areas 333 are arranged in a staggered manner, the length of the positive Poisson's ratio holes 34 in the stretching direction X is greater than the length in the contraction direction H, which is more conducive to forming positive Poisson's ratio holes 34 with a large opening area on the stretching part 33, thereby facilitating the reduction of the number of openings of the stretching part 33.

[0099] like Figures 2 to 5 As shown, along the stretching direction X, the stretching portion 33 includes a first stretching sub-portion B, a second stretching sub-portion C, and a third stretching sub-portion D arranged in sequence; along the stretching direction, the distance between adjacent positive Poisson's ratio holes 34 in the first stretching sub-portion B is greater than the distance between adjacent positive Poisson's ratio holes 34 in the second stretching sub-portion C, and the distance between adjacent positive Poisson's ratio holes 34 in the second stretching sub-portion C is greater than the distance between adjacent positive Poisson's ratio holes 34 in the third stretching sub-portion D. This is conducive to increasing the proportion of the opening area of ​​the plurality of positive Poisson's ratio holes 34 on the stretching portion 33.

[0100] In order to make the opening area of ​​the multiple positive Poisson's ratio holes 34 on the stretching portion 33 show an increasing trend, in some optional embodiments, the multiple positive Poisson's ratio holes 34 have the same shape, and the opening area of ​​the positive Poisson's ratio holes 34 located in the first stretching sub-portion B is smaller than the opening area of ​​the positive Poisson's ratio holes 34 located in the second stretching sub-portion C, and the opening area of ​​the positive Poisson's ratio holes 34 located in the second stretching sub-portion C is smaller than the opening area of ​​the positive Poisson's ratio holes 34 located in the third stretching sub-portion D.

[0101] like Figure 5 As shown, in some optional embodiments, along the stretching direction X, adjacent positive Poisson's ratio holes 34 located in the third stretching sub-portion D are connected to each other.

[0102] In order to make the opening area proportion of the plurality of positive Poisson's ratio holes 34 on the stretching portion 33 increase, in some other embodiments, the positive Poisson's ratio holes 34 can also be set to have the same shape and area, and the opening density of the positive Poisson's ratio holes 34 located in the first stretching sub-portion B is less than the opening density of the positive Poisson's ratio holes 34 located in the second stretching sub-portion C, and the opening density of the positive Poisson's ratio holes 34 located in the second stretching sub-portion C is less than the opening density of the positive Poisson's ratio holes 34 located in the third stretching sub-portion D. That is, along the stretching direction X, the opening density of the plurality of positive Poisson's ratio holes 34 has an increasing trend.

[0103] The opening density refers to the number of openings of positive Poisson's ratio holes 34 per unit area.

[0104] On the one hand, compared with changing the number of openings of the positive Poisson's ratio holes 34 of the same shape and area to change the Poisson's ratio of the stretching portion 33, changing the opening area of ​​the positive Poisson's ratio holes 34 of the same shape not only makes it easier to design the change trend of the Poisson's ratio of the stretching portion 33, but also can relatively reduce the number of openings of the positive Poisson's ratio holes 34, thereby being more conducive to the molding of the display panel 3; on the other hand, the positive Poisson's ratio holes 34 with a small opening area have relatively little effect on the Poisson's ratio of the stretching portion 33.

[0105] like Figure 6 As shown, in some embodiments, the display panel 3 includes a flexible substrate 35, a light-emitting functional layer 37 and an encapsulation layer 39 which are stacked in sequence, and the positive Poisson's ratio hole 34 includes a first hole 341 formed on the flexible substrate 35, a second hole 343 formed on the light-emitting functional layer 37 and a third hole 345 formed on the encapsulation layer 39, and the second hole 343 connects the first hole 341 and the third hole 345.

[0106] like Figure 7 As shown, in some embodiments, the display panel 3 includes a flexible substrate 35, a driving circuit layer 36, a light-emitting functional layer 37 and an encapsulation layer 39 which are stacked in sequence, and the positive Poisson's ratio hole 34 includes a first hole 341 formed on the flexible substrate 35, a second hole 343 formed on the light-emitting functional layer 37, a third hole 345 formed on the encapsulation layer 39, and a fourth hole 347 formed on the driving circuit layer 36. The fourth hole 347 connects the first hole 341 with the second hole 343, and the second hole 343 with the third hole 345.

[0107] Optionally, the flexible substrates 35 are all made of polyimide materials.

[0108] like Figure 6 and Figure 7As shown, optionally, the light-emitting functional layer 37 includes a pixel definition layer 371 that defines a plurality of pixel openings 372 and a pixel unit 373 arranged at each pixel opening 372, the pixel unit 373 includes an anode 374 exposed by the pixel opening 372, a light-emitting layer 375 located on the anode 374, and a cathode layer 376 located on the side of the anode 374 away from the light-emitting layer 375 and covering the pixel definition layer 371.

[0109] The second hole 343 includes a fifth hole 348 penetrating the pixel definition layer 371 and a sixth hole 349 penetrating the cathode layer 376 . The diameter of the sixth hole 349 is larger than that of the fifth hole 348 so that the encapsulation layer 39 covers the inner wall of the sixth hole 349 .

[0110] Optionally, the fourth hole 347 is formed on the insulating layer of the driving circuit layer 36 and avoids the conductive circuit of the driving circuit layer 36 .

[0111] Optionally, the display panel may further include an elastic module layer covering the encapsulation layer 39 , the elastic module layer is bonded to the encapsulation layer 39 , and changes with the deformation of the stretching portion, further ensuring that no wrinkles are formed during the bonding process of the display panel.

[0112] like Figure 1 and Figure 8 As shown, Figure 1 The display panels shown are bonded to form Figure 8 The stretching portion 33 has a first area 335, a second area 337 and a third area 339. The first area 335 is connected to the first portion 31, the second area 337 is connected to the second portion 32, and the second area 337 and the first area 335 are spaced apart along the contraction direction H. The third area 339 connects the first area 335 and the second area 337. The first portion 31 and the first area 335 are used to form Figure 8 The first single curved surface 301, the second area 337 and the second portion 32 are used to form Figure 8 The second single curved surface 302 shown, the third area 339 is used to form Figure 8 Hyperboloid 303 is shown.

[0113] Specifically, Figure 1 During the bonding process between the display panel 3 and the cover plate, the stretching portion 33 stretches along the stretching direction X and shrinks along the shrinking direction H so that the third area 339 is formed. Figure 8 The hyperboloid 303, the first portion 31 and the first region 335 shown form Figure 8 The first single curved surface 301 and the second area 337 and the second portion 32 are formed Figure 8 The second single curved surface 302 is shown. The hyperboloid 303 corresponds to the profiled surface of the cover plate, the first single curved surface 301 corresponds to the single curved surface of the cover plate 8 in the first direction, and the second single curved surface 302 corresponds to the single curved surface of the cover plate 8 in the second direction.

[0114] Optionally, by controlling the increasing trend of the Poisson's ratio of the stretching portion 33 along the stretching direction X, a hyperbolic surface 303 with different preset curvatures can be obtained; by controlling the absolute increase value of the Poisson's ratio of the stretching portion 33 along the stretching direction X, a display screen with different degrees of curvature can be obtained, such as a micro-curved display screen or a deep-curved display screen.

[0115] The embodiment of the second aspect of the present application further provides a display module, which includes a display screen having at least one arc angle formed by bonding the above-mentioned display panels 3.

[0116] Please continue reading Fig. 9 and Fig.10 , Fig. 9 A cross-sectional view of a planar portion of a display module provided by an embodiment of the second aspect of the present application; Fig.10 A partial structural diagram of a cross-sectional view of a curved portion of a display module provided in an embodiment of the second aspect of the present application.

[0117] like Fig. 9 and Fig.10 As shown, in some embodiments, the display module includes a support film 1 , a display screen 3 , a polarizer 5 , an optical adhesive layer 7 and a cover plate 8 .

[0118] The supporting film 1 is connected to the display screen 3 via the first optical adhesive 4;

[0119] The polarizer 5 is connected to the side of the display screen 3 facing away from the supporting film 1 via the second optical adhesive 6 .

[0120] The optical adhesive layer 7 is connected to a side of the polarizer 5 facing away from the display screen 3 .

[0121] The cover plate 8 is connected to a side of the optical adhesive layer 7 facing away from the polarizer 5 .

[0122] Optionally, in order to make the display module have a preset four-curved display effect, the polarizer 5 and the cover plate 8 have the same four-curved surfaces as the display screen 3. Therefore, the display module has a flat surface portion corresponding to the display screen 3 and a curved surface portion corresponding to the hyperboloid 303.

[0123] In some embodiments, the stretching resilience of the first optical adhesive 4 is 30% to 50%, and each positive Poisson's ratio hole 34 is filled with the first optical adhesive 4 .

[0124] In some embodiments, the stretching resilience of the second optical adhesive 6 is 30% to 50%, and each positive Poisson's ratio hole 34 is filled with the second optical adhesive 6 .

[0125] In some embodiments, the stretching resilience of the optical adhesive layer 7 is 30% to 50%.

[0126] In other embodiments, the display module may not include a polarizer, and the cover plate 8 is directly connected to the display panel 3 via the optical adhesive layer 7 .

[0127] In the above display module, high-fluidity optical glue is used to connect two adjacent layers of structure. On the one hand, it can be more evenly distributed on the bonding surface to ensure consistent optical performance and connection strength in the bonding area. On the other hand, it is more conducive to achieving a four-curved display effect.

[0128] The display panel or display module of the embodiment of the present application is applied to a display device, which can realize a zero-border display on the side frame of the display device on the basis of realizing a true four-curved display effect. The type of the display device is not limited here, and the display device can be a terminal such as a mobile phone, a tablet computer, and a television.

[0129] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A display panel, characterized in that: The invention comprises a main body and at least one stretching part, wherein at least one stretching part is located at the peripheral side of the main body, and the stretching part can be stretched in a stretching direction and contracted in a contraction direction, and the stretching part comprises: The non-pixel region is provided with a plurality of positive Poisson's ratio holes, each of the positive Poisson's ratio holes penetrates the non-pixel region along the thickness direction of the stretching portion; A plurality of pixel regions are arranged at intervals through the non-pixel region; The non-pixel region and the pixel region both extend along the stretching direction, and in the stretching direction, the Poisson's ratio of the stretching portion is greater than the Poisson's ratio of the main body portion.

2. The display panel according to claim 1, characterized in that: Along the stretching direction, the Poisson's ratio of the stretching portion close to the main body is smaller than the Poisson's ratio of the stretching portion away from the main body; Preferably, along the stretching direction, the Poisson's ratio of the stretching portion gradually increases; Preferably, along the contraction direction, the Poisson's ratio of the stretching portion first gradually increases and then gradually decreases.

3. The display panel according to claim 1, characterized in that: Along the stretching direction, the opening area ratio of the plurality of positive Poisson's ratio holes on the stretching portion gradually increases; Preferably, along the contraction direction, the opening area ratio of the plurality of positive Poisson's ratio holes on the stretching portion first gradually increases and then gradually decreases; Preferably, the opening area of ​​the plurality of positive Poisson's ratio holes on the stretching portion accounts for 10% to 50%.

4. The display panel according to claim 3, characterized in that: Each of the positive Poisson's ratio holes has the same shape; Preferably, in two adjacent positive Poisson's ratio holes in the stretching direction, the opening area of ​​the positive Poisson's ratio hole close to the main body is smaller than the opening area of ​​the positive Poisson's ratio hole far from the main body.

5. The display panel according to any one of claims 1 to 4, characterized in that: The length of the positive Poisson's ratio hole in the stretching direction is not less than the length in the contraction direction; Preferably, the positive projection of the positive Poisson's ratio hole in the thickness direction is a quadrilateral, and the quadrilateral has a first diagonal and a second diagonal intersecting each other, and the first diagonal is parallel to the stretching direction; Preferably, the first diagonal line is perpendicular to the second diagonal line; Preferably, the first diagonal line and the second diagonal line are symmetry axes of each other; Preferably, the stretching portion is axially symmetrically arranged, and the stretching direction is parallel to the symmetry axis of the stretching portion; Preferably, the plurality of pixel regions are distributed in an array in the stretching direction and the contraction direction; Preferably, the plurality of positive Poisson's ratio holes are distributed in an array in the stretching direction and the contraction direction; Preferably, in the shrinking direction, the plurality of positive Poisson's ratio holes are arranged in a staggered manner with respect to the plurality of pixel regions.

6. The display panel according to claim 1, 2 or 3, characterized in that: Along the stretching direction, the stretching portion includes a first stretching sub-portion, a second stretching sub-portion, and a third stretching sub-portion arranged in sequence; along the stretching direction, the distance between adjacent positive Poisson's ratio holes in the first stretching sub-portion is greater than the distance between adjacent positive Poisson's ratio holes in the second stretching sub-portion, and the distance between adjacent positive Poisson's ratio holes in the second stretching sub-portion is greater than the distance between adjacent positive Poisson's ratio holes in the third stretching sub-portion; Preferably, the plurality of positive Poisson's ratio holes have the same shape, and the opening area of ​​the positive Poisson's ratio holes in the first stretching sub-portion is smaller than the opening area of ​​the positive Poisson's ratio holes in the second stretching sub-portion, and the opening area of ​​the positive Poisson's ratio holes in the second stretching sub-portion is smaller than the opening area of ​​the positive Poisson's ratio holes in the third stretching sub-portion; Preferably, along the stretching direction, adjacent positive Poisson's ratio holes in the third stretching sub-portion are connected to each other; Preferably, the shape and area of ​​each of the positive Poisson's ratio holes are the same, and the opening density of the positive Poisson's ratio holes located in the first stretching sub-section is smaller than the opening density of the positive Poisson's ratio holes located in the second stretching sub-section, and the opening density of the positive Poisson's ratio holes located in the second stretching sub-section is smaller than the opening density of the positive Poisson's ratio holes located in the third stretching sub-section.

7. The display panel according to claim 1, characterized in that: The display panel comprises a flexible substrate, a light-emitting functional layer and an encapsulation layer which are stacked in sequence, the positive Poisson's ratio hole comprises a first hole formed on the flexible substrate, a second hole formed on the light-emitting functional layer and a third hole formed on the encapsulation layer, and the second hole connects the first hole and the third hole; or, The display panel includes a flexible substrate, a driving circuit layer, a light-emitting functional layer and an encapsulation layer which are stacked in sequence. The positive Poisson's ratio hole includes a first hole formed on the flexible substrate, a second hole formed on the light-emitting functional layer, a third hole formed on the encapsulation layer and a fourth hole formed on the driving circuit layer. The fourth hole connects the first hole with the second hole, and the second hole connects the third hole.

8. The display panel according to claim 1, characterized in that: The display panel further includes a first portion disposed on one side of the main body in a first direction and a second portion disposed on one side of the main body in a second direction, wherein the first portion and the second portion are connected via the stretching portion; the stretching portion has: a first zone connected to the first portion; a second area connected to the second portion, and the second area and the first area are spaced apart along the contraction direction; a third zone connecting the first zone and the second zone; The first portion and the first area are used to form a first single-curved surface, the second area and the second portion are used to form a second single-curved surface, and the third area is used to form a hyperbolic surface.

9. A display module, characterized in that: It comprises a display screen having at least one arc angle formed by bonding the display panels as described in any one of claims 1 to 8.

10. The display module according to claim 9, characterized in that: The display module also includes: A supporting film connected to the display screen via a first optical adhesive; A polarizer, connected to a side of the display screen away from the supporting film via a second optical adhesive; An optical adhesive layer connected to a side of the polarizer facing away from the display screen; A cover plate connected to a side of the optical adhesive layer facing away from the polarizer; Preferably, the stretching resilience of the first optical adhesive is 30% to 50%, and each of the positive Poisson's ratio holes is filled with the first optical adhesive; Preferably, the stretching resilience of the second optical adhesive is 30% to 50%, and each of the positive Poisson's ratio holes is filled with the second optical adhesive; Preferably, the stretch resilience of the optical adhesive layer is 30% to 50%.

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