Display panel, preparation method of display panel, display module and display device

Abstract

The embodiment of the invention provides a display panel, a preparation method of the display panel, a display module and a display device, and is applied to the technical field of display, and the display panel can realize a folding function and has better effects of impact resistance, extrusion resistance, film printing resistance and the like. The display panel comprises at least one folding area and a plurality of non-folding areas, and one folding area is located between every two adjacent non-folding areas; the display panel comprises a substrate and a display function layer located on one side of the substrate. The substrate comprises a rigid base material and an organic material layer, the rigid base material comprises a first surface and a second surface which are opposite, the first surface is provided with at least one first groove, the first groove is correspondingly formed in the folding area, and the rigid base material can be folded at the position of the at least one first groove; the organic material layer is arranged on one side of the first surface of the rigid base material and fills the at least one first groove, the boundary of the organic material layer extends outwards by a set distance compared with the boundary of the rigid base material, and at least one side of the rigid base material is coated with the organic material layer.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel, a method for manufacturing the display panel, a display module, and a display device. Background Technology

[0002] Currently, display panels, such as OLED (Organic Light-Emitting Diode) display panels or QLED (Quantum Dot Light-Emitting Diodes) display panels, are increasingly widely used in various display products such as mobile phones, tablets, computers, and televisions due to their self-emissive characteristics.

[0003] In recent years, with the advancement of technology and the continuous improvement of user demands, foldable screen products have gradually become a new favorite in the market. Foldable screen products have attracted the attention of countless consumers with their flexible use and innovative design. Summary of the Invention

[0004] This disclosure provides a display panel with foldable functionality and good resistance to impact, compression, and film printing.

[0005] This disclosure provides a display panel including at least one folded area and a plurality of non-folded areas, wherein the folded area is located between two adjacent non-folded areas; the display panel includes: a substrate and a display functional layer located on one side of the substrate; the substrate includes a rigid substrate and an organic material layer, the rigid substrate includes a first surface and a second surface opposite to each other, the first surface is provided with at least one first groove, the first groove is correspondingly disposed in the folded area, and the rigid substrate can be folded at at least one first groove position; the organic material layer is disposed on one side of the first surface of the rigid substrate and fills at least one first groove, the boundary of the organic material layer extends outward by a predetermined distance relative to the boundary of the rigid substrate, and covers at least one side of the rigid substrate.

[0006] The beneficial effects of some embodiments of this disclosure are as follows: the substrate of the display panel includes a rigid substrate and an organic material layer; the rigid substrate has good impact resistance, compression resistance, and film printing resistance; by setting a first groove in the area corresponding to the folding area on the first surface of the rigid substrate, the rigid substrate is thinned at this position, and the rigid substrate can be folded in at least one folding area, thus realizing the foldable function of the display panel; at the same time, the organic material layer is disposed on one side of the first surface of the rigid substrate and fills at least one first groove, and the boundary of the organic material layer extends outward by a set distance compared with the boundary of the rigid substrate, and covers at least one side of the rigid substrate, such as all four sides, so that the organic material layer can better protect the rigid substrate from damage and further improve the impact resistance, compression resistance, and film printing resistance of the back of the display panel.

[0007] In some embodiments, the rigid substrate is a glass substrate, a sapphire substrate, or a quartz substrate.

[0008] In some embodiments, at least one position of the bottom surface of the first groove closest to the second surface of the rigid substrate, the distance between the groove and the second surface of the rigid substrate ranges from 50 μm to 100 μm.

[0009] In some embodiments, the boundary of the orthographic projection of the functional layer onto the substrate surrounds at least one boundary of the rigid substrate.

[0010] In some embodiments, the display functional layer is disposed on one side of the rigid substrate; the portion of the organic material layer extending outward relative to the rigid substrate is flush with the second surface of the rigid substrate near the surface of the display functional layer.

[0011] In some embodiments, the display functional layer is disposed on one side of the organic material layer; the display panel also includes a protective layer located on the side of the substrate away from the display functional layer.

[0012] In some embodiments, the display panel further includes a bonding bending area, wherein the portion of the organic material layer extending outward relative to the rigid substrate is an extension of the organic material layer; the bonding bending area corresponds to a portion of the extension of the organic material layer; the extension of the organic material layer is provided with a blind groove, which is provided on the side of the organic material layer away from the display functional layer and is correspondingly provided in the bonding bending area.

[0013] In some embodiments, the ratio of the depth of the blind groove to the thickness of the portion of the organic material layer extending outward relative to the rigid substrate ranges from 0.6 to 0.9.

[0014] In some embodiments, the bottom surface of at least one first groove is provided with a plurality of second grooves and / or a plurality of protrusions.

[0015] In some embodiments, the second groove is a strip-shaped groove, and the extension direction of the second groove is consistent with the extension direction of at least one folded area; and / or, the protrusion is a strip-shaped protrusion, and the extension direction of the protrusion is consistent with the extension direction of at least one folded area.

[0016] In some embodiments, the second groove and / or protrusion is shaped as a prism and / or pyramid and / or cylindrical and / or hemispherical.

[0017] In some embodiments, at least one first groove includes a bottom surface and a side surface connected to the bottom surface; the side surface is shaped as an arc surface or a slope surface; or, the side surface is perpendicular to the bottom surface, and there is a rounded corner between the side surface and the bottom surface and / or, there is a rounded corner between the side surface and the first surface of the rigid substrate.

[0018] Some embodiments of this disclosure also provide a method for manufacturing a display panel, including: S1, providing a rigid substrate, the rigid substrate including opposing first and second surfaces, the rigid substrate including at least one folded area; S2, forming at least one first groove on the first surface of the rigid substrate, the first groove being correspondingly disposed in the folded area; S3, forming an organic material layer on one side of the first surface of the rigid substrate, the organic material layer filling the at least one first groove, and the boundary of the organic material layer extending outward by a predetermined distance relative to the boundary of the rigid substrate, and covering the periphery of the rigid substrate to form a substrate; S4, forming a display functional layer on one side of the substrate.

[0019] The display panel obtained by the above preparation method can achieve the function of folding and has good resistance to impact, compression and film printing.

[0020] In some embodiments, the portion of the organic material layer extending outward relative to the rigid substrate includes a bonding bending region; the method for preparing the display panel further includes: after forming an organic material layer on one side of a first surface of the rigid substrate, forming a blind groove in the portion of the organic material layer extending outward relative to the rigid substrate, the blind groove being disposed on the side of the organic material layer away from the display functional layer and correspondingly disposed in the bonding bending region.

[0021] Some embodiments of this disclosure also provide a display module, including the display panel described above and a driving chip connected to the display panel; the display panel includes a display surface and a non-display surface; the driving chip is disposed on the portion of the organic material layer of the display panel that extends outward relative to the rigid substrate, and is disposed on the display surface side of the display panel; the driving chip is configured to bend to the non-display surface side of the display panel along with the portion of the organic material layer that extends outward relative to the rigid substrate.

[0022] The display module, including the display panel mentioned above, can be folded, and can also be designed with a narrow bezel. It also has good resistance to impact, compression, and film printing.

[0023] In some embodiments, the display module further includes a cover plate and a metal support layer; the cover plate is disposed on the display surface side of the display panel; the metal support layer is disposed on the side of the display panel away from the cover plate.

[0024] Some embodiments of this disclosure also provide a display device, including the display module described above.

[0025] The display device including the display module mentioned above can realize the folding function, can also realize the design of narrow bezel of the display device, and has good impact resistance, compression resistance, and anti-film printing effect. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0027] Figure 1 A cross-sectional view of a display module provided in some embodiments;

[0028] Figure 2 Another cross-sectional view of the display module provided in some embodiments;

[0029] Figure 3 Another cross-sectional view of the display module provided in some embodiments;

[0030] Figure 4 Another cross-sectional view of the display module provided in some embodiments;

[0031] Figure 5 A plan view of a display panel provided for some embodiments of this disclosure;

[0032] Figure 6 A cross-sectional view of a display panel provided for some embodiments of this disclosure;

[0033] Figure 7 A cross-sectional view of a substrate provided for some embodiments of this disclosure;

[0034] Figure 8 A plan view of the substrate provided for some embodiments of this disclosure;

[0035] Figure 9 Another plan view of a display panel provided for some embodiments of this disclosure;

[0036] Figure 10 Another cross-sectional view of a display panel provided for some embodiments of this disclosure;

[0037] Figure 11 Another cross-sectional view of a display panel provided for some embodiments of this disclosure;

[0038] Figure 12 Another cross-sectional view of the substrate provided for some embodiments of this disclosure;

[0039] Figure 13 A cross-sectional view of a second groove or protrusion provided for some embodiments of this disclosure;

[0040] Figure 14 A top view of a first groove provided for some embodiments of this disclosure;

[0041] Figure 15 A cross-sectional view of the first groove provided for some embodiments of this disclosure;

[0042] Figure 16 A flowchart illustrating the fabrication process of a display panel provided for some embodiments of this disclosure;

[0043] Figure 17 A step diagram illustrating the preparation process of a rigid substrate provided in some embodiments of this disclosure;

[0044] Figure 18 A diagram illustrating another preparation step of the rigid substrate provided in some embodiments of this disclosure;

[0045] Figure 19A A diagram illustrating the preparation steps of a substrate provided for some embodiments of this disclosure;

[0046] Figure 19B A diagram illustrating the preparation steps of a substrate provided for some embodiments of this disclosure;

[0047] Figure 20 Another cross-sectional view of the substrate provided for some embodiments of this disclosure;

[0048] Figure 21 Another manufacturing process diagram of a display panel provided for some embodiments of this disclosure;

[0049] Figure 22 Another cross-sectional view of a display module provided in some embodiments of this disclosure;

[0050] Figure 23 Another cross-sectional view of a display module provided for some embodiments of this disclosure. Detailed Implementation

[0051] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0052] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific feature, structure, material, or characteristic may be included in any suitable manner in any one or more embodiments or examples.

[0053] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0054] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0055] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0056] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. “equal” includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, a difference between the two equal values ​​being less than or equal to 5% of either one. Numerical limits are not strictly defined, and values ​​within the acceptable deviation range may fluctuate, for example, by 5%.

[0057] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0058] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0059] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, in some embodiments, the display module 100 may be stacked from bottom to top, comprising a display panel 10, a polarizer 102, an adhesive material 103, and a cover plate 104. For example... Figure 1 and Figure 2 As shown, exemplarily, the display module 100 also includes a metal support layer 101 disposed on the side of the display panel 10 away from the cover plate 104. Wherein, as Figure 1 and Figure 3 As shown, the display panel 10 may include a flexible substrate 11 and a substrate protective layer 13 protecting the flexible substrate 11, or, as... Figure 2 and Figure 4 As shown, the display panel 10 may include a rigid substrate 14, such as glass.

[0060] like Figure 1 As shown, the flexible substrate 11 provides a supporting foundation for other film layer structures in the display panel 10, that is, other film layer structures in the display panel 10, such as the display functional layer 12, are fabricated on the flexible substrate 11. The material of the flexible substrate 11 is typically a flexible material such as polyimide (PI) or saturated polyester (PET); due to the foldable and bendable characteristics of the flexible substrate 11, the display panel 10 made using the flexible substrate 11 has been widely used in foldable display products; such as... Figure 3 As shown, the display panel 10 made of the flexible substrate 11 can be designed with a pad bending structure to achieve a narrow bezel design for the display panel 10.

[0061] In some embodiments, a flexible substrate is fabricated using polyimide (PI) or saturated polyester (PET) as the carrier. Using a flexible substrate allows for folding and bending, enabling the display panel 10 to achieve foldable functionality and a narrow bezel design.

[0062] In some embodiments, a rigid substrate is used as the load-bearing structure. As the foldable display product is folded for longer periods and more frequently, when it unfolds from a folded state, the folded area is less prone to wrinkles and noticeable creases. The display screen more easily recovers or returns to a flat state, exhibiting good crease recovery performance. Furthermore, the impact resistance, compression resistance, and film printing resistance of the back of the display panel 10 can be enhanced. To achieve better impact resistance, compression resistance, and film printing resistance on the back of the display panel 10, such as... Figure 2 As shown, the display panel 10 can be made of a rigid substrate 14, such as glass.

[0063] like Figure 5 As shown, some embodiments of this disclosure provide a display panel 10, including at least one folded area CC and a plurality of non-folded areas NN, wherein a folded area CC is located between two adjacent non-folded areas NN; as Figure 6 As shown, the display panel 10 includes: a substrate 15 and a display functional layer 12 located on one side of the substrate 15; as Figure 7As shown, the substrate 15 includes a rigid substrate 151 and an organic material layer 152. The rigid substrate 151 includes a first surface 151-1 and a second surface 151-2 facing each other. The first surface 151-1 is provided with at least one first groove 1, which is correspondingly disposed at the folding area CC. The rigid substrate 151 can be folded at at least one first groove 1 position. The organic material layer 152 is disposed on one side of the first surface 151-1 of the rigid substrate 151 and fills at least one first groove 1. The boundary of the organic material layer 152 extends outward by a predetermined distance relative to the boundary of the rigid substrate 151 and covers at least one side of the rigid substrate 151. 'Correspondingly disposed' can be interpreted as the orthographic projection of the first groove 1 on the rigid substrate 151 completely covering the folding area CC, partially covering the folding area CC, or completely falling into the folding area CC. The positional relationship is not limited, as long as bending at this position can be achieved.

[0064] In some embodiments, the first groove 1 is a blind hole; in other embodiments, the first groove is a through hole or multiple through holes.

[0065] For example, the display panel 10 may be an OLED (Organic Light-Emitting Diode) display panel 10, a Micro Organic Light-Emitting Diode (Micro OLED) display panel 10, a Quantum Dot Light-Emitting Diode (QLED) display panel 10, a Mini Light-Emitting Diode (Mini LED) display panel 10, or a Micro Light-Emitting Diode (Micro LED) display panel 10, etc. Some embodiments of this disclosure are illustrated using an OLED display panel 10 as an example.

[0066] For example, such as Figure 5As shown, the display panel 10 may include a display area AA and a peripheral area BB surrounding the display area AA. The display area AA is provided with multiple sub-pixels arranged in an array. The peripheral area BB is provided with signal lines, such as clock signal lines (CLK lines), trigger signal lines (STV lines), etc. The display panel 10 may also include at least one folded area CC and multiple non-folded areas NN. For example, the plane on which the display panel 10 is located includes an intersecting first direction X and a second direction Y. For example, the first direction X and the second direction Y are perpendicular. The first direction X is the row direction of the sub-pixel arrangement, and the second direction Y is the column direction of the sub-pixel arrangement. For example, at least one folding area CC and multiple non-folding areas NN are arranged along a second direction Y, and the folding area CC extends along a first direction X; or, for another example, at least one folding area CC and multiple non-folding areas NN are arranged along a first direction X, and the folding area CC extends along a second direction Y; a folding area CC may include a portion of the display area AA and a portion of the peripheral area BB, and the display panel 10 is folded at the folding area CC position, for example, the display panel 10 may be folded towards the display surface; or, for another example, the display panel 10 may be folded towards the non-display surface; the position setting of the folding area CC can be set according to the actual product, and this disclosure does not limit it. A folding area CC divides the remaining area of ​​the display panel 10 into two non-folding areas NN; multiple folding areas CC divide the remaining area of ​​the display panel 10 into multiple non-folding areas NN, and a folding area CC is located between two adjacent non-folding areas NN; it is understood that some embodiments of this disclosure may have only one folding area CC or multiple folding areas CC, and this disclosure does not limit it.

[0067] For example, such as Figure 6 As shown, the display panel 10 includes a substrate 15 and a display functional layer 12 located on one side of the substrate 15; the substrate 15 provides a support for other film layer structures in the display panel 10, such as the display functional layer 12. The display functional layer 12 may include a driving circuit layer 121, a light-emitting layer 122, an encapsulation layer 123, etc., stacked together.

[0068] For example, such as Figure 7 As shown, the substrate 15 includes a rigid substrate 151 and an organic material layer 152. The structure of the substrate is described in detail below.

[0069] It should be noted that the "rigidity" in the rigid substrate 151 described in this disclosure refers to the material's ability to resist deformation under external force.

[0070] Specifically, the rigid substrate 151 has good impact resistance, compression resistance, and film printing resistance. To improve the impact resistance, compression resistance, and film printing resistance of the back of the display panel 10, the rigid substrate 151 can be used to make the base 15 of the display panel 10; to enable the display panel 10 to achieve a foldable function, such as... Figure 7 As shown, at least one first groove 1 can be provided on the first surface 151-1 of the rigid substrate 151. The first groove 1 is correspondingly provided in the folding area CC. It can be understood that one first groove 1 is correspondingly provided in one folding area CC. 'Correspondingly provided' can be interpreted as the orthographic projection of the first groove 1 on the rigid substrate 151 completely covering the folding area CC, partially covering the folding area CC, or completely falling into the folding area CC. The positional relationship is not limited, as long as bending at this position can be achieved.

[0071] When the display panel 10 has only one folding area CC, a first groove 1 is provided on the first surface 151-1 of the rigid substrate 151, and the first groove 1 is correspondingly provided on the folding area CC. When the display panel 10 has multiple folding areas CC, multiple first grooves 1 are provided on the first surface 151-1 of the rigid substrate 151, and the number of first grooves 1 is the same as the number of folding areas CC, with one first groove 1 corresponding to one folding area CC. 'Correspondingly provided' can be interpreted as the orthographic projection of the first groove 1 on the rigid substrate 151 completely covering the folding area CC, partially covering the folding area CC, or completely falling into the folding area CC. The positional relationship is not limited, as long as bending at this position can be achieved.

[0072] A first groove 1 is provided on the first surface 151-1 of the rigid substrate 151, corresponding to a folding area CC of the display panel 10. This is equivalent to thinning the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10. That is, the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 is thinner than the portion of the rigid substrate 151 corresponding to the non-folding area NN of the display panel 10. This setting makes the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 relatively weak in resistance to deformation. It can deform under the action of external force, thereby enabling the rigid substrate 151 to fold at least one position of the first groove 1, realizing the foldable function of the display panel 10. At the same time, the rigid substrate 151 at the position of the first groove 1 has the characteristics of impact resistance, compression resistance, and film printing resistance of the rigid substrate 151, giving the display panel 10 good crease recovery performance.

[0073] It should be noted that, as Figure 7 , Figure 8 As shown, the boundary of the organic material layer 152 extends outward by a set distance d4 relative to the boundary of the rigid substrate 151, and covers at least one side of the rigid substrate 151. This means that the boundary of the organic material layer 152 is not flush with the boundary of the rigid substrate 151, and the orthographic projection of the rigid substrate 151 onto the organic material layer 152 lies within the boundary line of at least one side of the organic material layer 152. The portion of the organic material layer 152 extending outward relative to the rigid substrate 151 is the extension portion 152-1 of the organic material layer 152; as... Figure 7 , Figure 8 As shown, exemplarily, the extension 152-1 of the organic material layer 152 surrounds at least one side, such as all four sides, of the rigid substrate.

[0074] Specifically, such as Figure 7 As shown, an organic material layer 152 is disposed on one side of the first surface 151-1 of the rigid substrate 151 and fills at least one first groove 1. This arrangement, on the one hand, allows the rigid substrate 151 and the organic material layer 152 to be integrated, making it less likely for the rigid substrate 151 and the organic material layer 152 to peel off, and the organic material layer 152 can be used to protect the first surface 151-1 of the rigid substrate 151; on the other hand, the boundary of the organic material layer 152 extends outward by a predetermined distance relative to the boundary of the rigid substrate 151 and covers at least one side of the rigid substrate 151, for example, all four sides, thus protecting the rigid substrate 151. For example, as shown... Figure 10 As shown, during the fabrication process of the display panel 10, the display functional layer 12 in the display panel 10 is formed on one side of the substrate 15. When the substrate 15 is cut and shaped, or when the stack of the display functional layer 12 and the substrate 15 is cut and shaped, at least one side of the rigid substrate 151, such as the organic material layer 152 around the perimeter, can be cut. This avoids the stress generated when directly cutting the rigid substrate 151, which could cause microcracks in the rigid substrate 151 and damage it. At the same time, the strengthening effect of the rigid substrate 151 is preserved. Furthermore, the organic material layer 152 adds a buffer to the first surface 151-1 and the perimeter of the rigid substrate 151, improving the impact resistance of the edge of the rigid substrate 151 and preventing the rigid substrate 151 from being damaged by bumps. It can also further improve the impact resistance, compression resistance, and film printing resistance of the back of the display panel 10.

[0075] The organic material layer 152 can be made of organic materials such as polyimide (PI) or saturated polyester (PET), and this disclosure does not limit it.

[0076] The boundary of the organic material layer 152 described in some embodiments of this disclosure extends outward by a set distance relative to the boundary of the rigid substrate 151. This extension can be designed according to the specific process of the actual product, and is not limited herein.

[0077] The beneficial effects of the display panel 10 provided in some embodiments of this disclosure are as follows: the substrate 15 of the display panel 10 includes a rigid substrate 151 and an organic material layer 152; the rigid substrate 151 has good impact resistance, compression resistance, and film printing resistance; by setting a first groove 1 in the area corresponding to the folding area CC on the first surface 151-1 of the rigid substrate 151, the rigid substrate 151 is thinned at this position, and the rigid substrate 151 can be folded in at least one folding area CC, thus realizing the foldable function of the display panel 10; at the same time, the organic material layer 152 is disposed on one side of the first surface 151-1 of the rigid substrate 151 and fills at least one first groove 1, the boundary of the organic material layer 152 extends outward by a set distance compared with the boundary of the rigid substrate 151, and covers at least one side of the rigid substrate 151, such as all four sides, the organic material layer 152 can better protect the rigid substrate 151 from damage, and further improve the impact resistance, compression resistance, and film printing resistance of the back side of the display panel 10.

[0078] In some embodiments, the rigid substrate 151 may be a glass substrate, such as ultrathin glass; the rigid substrate 151 may also be a sapphire substrate or a quartz substrate, which is not limited herein.

[0079] In some embodiments, such as Figure 7 As shown, at least one of the bottom surfaces 1-1 of the first groove 1 closest to the second surface 151-2 of the rigid substrate 151 has a distance d1 ranging from 50µm to 100µm (the numerical limit is not strictly defined, and the value is within an acceptable range, such as fluctuating up or down by 5%). That is, at least one of the bottom surfaces 1-1 of the first groove 1 closest to the second surface 151-2 of the rigid substrate 151 has a distance d1 ranging from greater than or equal to 50µm to less than or equal to 100µm.

[0080] For example, a first groove 1 is disposed on a first surface 151-1 of a rigid substrate 151. The first groove 1 includes a bottom surface 1-1. The bottom surface 1-1 of the first groove 1 is located closest to the second surface 151-2 of the rigid substrate 151. The distance d1 between the bottom surface 1-1 and the second surface 151-2 of the rigid substrate 151 can range from 50um to 100um. That is, the thickness of the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 can be from 50um to 100um, for example, 50um, 55um, 60um, 65um, 70um, 75um, 80um, etc. The range of values, such as 1µm, 85µm, 90µm, and 95µm, allows the rigid substrate 151, such as the glass substrate, to have relatively weak resistance to deformation in the folding area CC of the display panel 10. Under external force, the rigid substrate 151 can be folded at at least one first groove 1, thus realizing the foldable function of the display panel 10. At the same time, it ensures that the rigid substrate 151, such as the glass substrate, retains the characteristics of impact resistance, compression resistance, and film printing resistance at the first groove 1, giving the display panel 10 good crease recovery performance.

[0081] In some embodiments, the thickness of the rigid substrate 151 can be 100um to 300um, the depth of the first groove 1 can be 50um to 200um, and the thickness of the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 can be 50um to 100um.

[0082] For example, the rigid substrate 151 has a thickness of 100 μm, the first groove 1 has a depth of 50 μm, and the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 has a thickness of 50 μm; for another example, the rigid substrate 151 has a thickness of 150 μm, the first groove 1 has a depth of 100 μm, and the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 has a thickness of 50 μm; for yet another example, the rigid substrate 151 has a thickness of 200 μm, the first groove 1 has a depth of 100 μm, and the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 has a thickness of 100 μm; for yet another example, the rigid substrate 151 has a thickness of 250 μm, the first groove 1 has a depth of 190 μm, and the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 has a thickness of 60 μm; for yet another example, the rigid substrate 151 has a thickness of 300 μm, the first groove 1 has a depth of 200 μm, and the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 has a thickness of 100 μm.

[0083] In some embodiments, such as Figure 9 As shown, the boundary of the orthographic projection of the functional layer 12 onto the substrate 15 surrounds at least one boundary of the rigid substrate 151.

[0084] For example, such as Figure 7 As shown, the substrate 15 of the display panel 10 can be configured to include a rigid substrate 151, with at least one first groove 1 formed on a first surface 151-1 of the rigid substrate 151, and an organic material layer 152 formed on one side of the first surface 151-1 of the rigid substrate 151. The organic material layer 152 fills at least one first groove 1, and the boundary of the organic material layer 152 extends outward a certain distance relative to the boundary of the rigid substrate 151, and covers at least one side of the rigid substrate 151, for example, all four sides; Figure 9 As shown, the display functional layer 12 is fabricated on one side of the substrate 15. The boundary of the orthographic projection of the display functional layer 12 on the substrate 15 is located in the portion of the organic material layer 152 of the substrate 15 that extends outward relative to the rigid substrate 151. That is, the display functional layer 12 is located on the surface jointly formed by the rigid substrate 151 and the organic material layer 152. The boundary of the orthographic projection of the display functional layer 12 on the substrate 15 surrounds at least one boundary of the rigid substrate 151, for example, the boundary of the orthographic projection of the display functional layer 12 on the substrate 15 surrounds all four boundaries of the rigid substrate 151.

[0085] This arrangement is due to the fact that during the manufacturing process of the display panel, an initial display functional layer is formed on an initial substrate. The boundary of the orthographic projection of the initial display functional layer on the initial substrate surrounds at least one boundary of the rigid substrate. For example, the boundary of the orthographic projection of the display functional layer 12 on the substrate 15 surrounds all four boundaries of the rigid substrate 151. That is, the initial display functional layer is located on the rigid substrate and extends to the extension of the organic material layer. When cutting and shaping the initial substrate and the initial display functional layer, at least one side of the rigid substrate 151, such as the organic material layer 152 around the perimeter, can be cut to avoid damage to the rigid substrate 151 caused by stress generated when directly cutting the rigid substrate 151. Furthermore, the organic material layer 152 can further improve the impact resistance, compression resistance, and film printing resistance of the back side of the display panel 10. Thus, in the display panel 10 obtained after the cutting and shaping process, the boundary of the orthographic projection of the display functional layer 12 on the substrate 15 surrounds at least one boundary of the rigid substrate 151, for example, the boundary of the orthographic projection of the display functional layer 12 on the substrate 15 surrounds all four boundaries of the rigid substrate 151. For example, at least one boundary of the orthographic projection of the functional layer 12 onto the substrate 15 is flush with at least one boundary of the organic material layer 152.

[0086] In some embodiments, such as Figure 10 As shown, the display functional layer 12 is disposed on one side of the rigid substrate 151; the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 is flush with the second surface 151-2 of the rigid substrate 151 near the surface of the display functional layer 12.

[0087] For example, such as Figure 10As shown, the display functional layer 12 can be disposed on the side of the rigid substrate 151 of the substrate 15, that is, the display functional layer 12 can be disposed on the side of the second surface 151-2 of the rigid substrate 151 of the substrate 15. The organic material layer 152 of the substrate 15 can be used to protect the side of the rigid substrate 151 away from the display functional layer 12, that is, the organic material layer 152 of the substrate 15 can be used to protect the side of the first surface 151-1 of the rigid substrate 151, further improving the impact resistance, extrusion resistance, and film printing resistance of the back of the display panel 10. The surface of the organic material layer 152 extending outward relative to the rigid substrate 151 is flush with the second surface 151-2 of the rigid substrate 151, ensuring the flatness of the substrate 15. The display functional layer 12 is made on the flat substrate 15, ensuring the finished product yield of the display panel 10.

[0088] In some embodiments, such as Figure 11 As shown, the display functional layer 12 is disposed on one side of the organic material layer 152; the display panel 10 also includes a protective layer 16 located on the side of the substrate 15 away from the display functional layer 12.

[0089] For example, such as Figure 11 As shown, the display functional layer 12 can be disposed on the side where the organic material layer 152 of the substrate 15 is located. At this time, the side where the rigid substrate 151 of the substrate 15 is located is exposed, that is, the side where the second surface 151-2 of the rigid substrate 151 of the substrate 15 is exposed. The exposed second surface 151-2 of the rigid substrate 151 is easily damaged. A protective layer 16 can be disposed on the side where the second surface 151-2 of the rigid substrate 151 is located, that is, the protective layer 16 is disposed on the side of the substrate 15 away from the display functional layer 12. For example, the protective layer 16 overlaps with the rigid substrate 151. Furthermore, the protective layer 16 covers the second surface 151-2 of the rigid substrate 151. The boundary of the protective layer 16 slightly exceeds the boundary of the rigid substrate 151. The protective layer 16 is used to protect the side where the second surface 151-2 of the rigid substrate 151 is located, ensuring the finished product yield of the display panel 10.

[0090] The material of the protective layer 16 can be an organic material. In some embodiments, the material of the protective layer 16 is the same as the material of the organic material layer 152.

[0091] In some embodiments, such as Figure 5 As shown, the display panel 10 also includes a binding bending area DD, such as Figure 7 , Figure 8 As shown, the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 is the extension 152-1 of the organic material layer 152; the bonding bending area DD corresponds to a portion of the extension 152-1 of the organic material layer 152; a blind groove 2 is provided in the extension 152-1 of the organic material layer 152, as shown. Figure 10 , Figure 11 As shown, the blind slot 2 is located on the side of the organic material layer 152 away from the display function layer 12, and is correspondingly located in the binding bending area DD. 'Correspondingly located' can be interpreted as the orthographic projection of the blind slot 2 on the organic material layer 152 completely covering the binding bending area DD, partially covering the binding bending area DD, or completely falling into the binding bending area DD. The positional relationship is not limited, as long as a smaller bending radius is achieved at this location.

[0092] For example, such as Figure 6 As shown, the display panel 10 may include a display surface a and a non-display surface b. The side of the display functional layer 12 furthest from the substrate 15 is the display surface a side of the display panel 10; the side of the display functional layer 12 closest to the substrate 15 is the non-display surface b side of the display panel 10. Figure 5 As shown, the peripheral area BB of the display panel 10 can be divided into a left border, a right border, a top border, and a bottom border. At the bottom border of the peripheral area BB of the display panel 10, there may also be a binding bend area DD and a binding area EE connected to the binding bend area DD, such as... Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown, the film layer of the bonding area EE can be connected to the driver chip 4; the display panel 10 is bent at the bonding bending area DD, and the bonding area EE of the display panel 10 is bent to the non-display surface b side of the display panel 10 to achieve the narrow bezel design of the display panel 10.

[0093] It should be noted that, in order to bend the bonding area EE of the display panel 10 to the non-display surface b of the display panel 10, the portion of the substrate 15 corresponding to the bonding bending area DD needs to have low impact resistance and deformation resistance. Therefore, the rigid substrate 151 does not extend to the bonding bending area DD, and an organic material layer 152 is provided between the bonding bending area DD and the bonding area EE. That is to say, the bonding bending area DD corresponds to a part of the extension 152-1 of the organic material layer 152. The extension 152-1 of the organic material layer 152 can be bent in the bonding bending area DD, and the display function layer 12 of the display panel 10 can be bent to the non-display surface b of the display panel 10 along with the extension 152-1 of the organic material layer 152, thereby enabling the display panel 10 to achieve a narrow bezel design.

[0094] In other words, the distance by which the organic material layer 152 at the bottom edge of the display panel 10 extends outward relative to the rigid substrate 151 is greater than the distance by which the organic material layer 152 at the left edge, right edge, and top edge of the display panel 10 extends outward relative to the rigid substrate 151; at the bottom edge of the display panel 10, both the bonding bending area DD and the bonding area EE are located in a portion of the extension 152-1 of the organic material layer 152.

[0095] For example, in order to achieve a thinner design for the display panel 10, the bonding bending area DD is made to have a smaller bending radius, such as... Figure 10 , Figure 11 As shown, a blind groove 2 can be provided in a portion of the extension 152-1 of the organic material layer 152. The blind groove 2 is located on the surface of the substrate 15 away from the display functional layer 12. Both the bonding bending area DD and the bonding area EE are located in a portion of the extension 152-1 of the organic material layer 152. When the display panel 10 is bent at the position of the bonding bending area DD, the organic material layer 152 is actually bent. The organic material layer 152 has good flexibility and can be bent better and more conveniently at the position of the bonding bending area DD, realizing the narrow bezel design of the display panel 10. At the same time, the thickness of the portion of the substrate 15 located at the position of the blind groove 2 is less than the thickness of the portions of the substrate 15 located at other positions. When the display panel 10 is bent at the position of the blind groove 2, the stress generated during bending is smaller, and the bonding bending area DD can have a smaller bending radius, realizing the thin design of the display panel 10.

[0096] In some embodiments, such as Figure 7 As shown, the ratio of the depth d2 of the blind groove 2 to the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 can range from 0.6 to 0.9 (the numerical limit is not strictly defined, and values ​​within the acceptable deviation range are acceptable, such as fluctuations of 5%). That is, the ratio of the depth d2 of the blind groove 2 to the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 can be greater than or equal to 0.6 and less than or equal to 0.9.

[0097] For example, such as Figure 7 As shown, the ratio of the depth d2 of the blind groove 2 to the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 can be 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, or 0.9. This design ensures that the bonding bending area DD has a smaller bending radius, while the substrate 15 has strong strength, preventing the substrate 15 from breaking at the location of the blind groove 2 and damaging the display panel 10.

[0098] In some embodiments, the depth d2 of the blind groove 2 can be 80um to 250um (the numerical limit is not strictly defined, and the value within the acceptable deviation range is acceptable, for example, fluctuating up and down by 5%), and the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 can be 100um to 300um (the numerical limit is not strictly defined, and the value within the acceptable deviation range is acceptable, for example, fluctuating up and down by 5%). For example, if the depth d2 of the blind groove 2 is 80 μm and the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 is 100 μm, then the thickness of the organic material layer 152 at the blind groove 2 is 20 μm. As another example, if the depth d2 of the blind groove 2 is 150 μm and the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 is 200 μm, then the thickness of the organic material layer 152 at the blind groove 2 is 50 μm. And as yet another example, if the depth d2 of the blind groove 2 is 200 μm and the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 is 240 μm, then the thickness of the organic material layer 152 at the blind groove 2 is 40 μm. When the thickness of the organic material layer 152 at the blind groove 2 can be between 20 μm and 50 μm, the bending radius achievable in the bonding bending area DD can be between 0.2 mm and 1.0 mm (the numerical limits are not strictly defined, and values ​​within an acceptable deviation range are acceptable, such as fluctuations of up to 5%).

[0099] In some embodiments, such as Figure 12 As shown, at least one first groove 1 has a plurality of second grooves 5 and / or a plurality of protrusions 6 on its bottom surface 1-1.

[0100] For example, in order to fold the display panel 10 to a smaller radius, or to fold it more times, such as Figure 12 As shown, the bottom surface 1-1 of the first groove 1 can be provided with multiple second grooves 5 and / or multiple protrusions 6. An enlarged cross-sectional view of the multiple second grooves 5 and / or multiple protrusions 6 is shown below. Figure 13 As shown. When the display panel 10 is folded, the stress generated in the folding area CC can be distributed on multiple second grooves 5 and / or multiple protrusions 6. That is, the stress generated when the display panel 10 is folded will reduce the distance between the sides of the second grooves 5 in the stress generation direction and / or reduce the distance between the top surfaces of adjacent protrusions 6 in the stress generation direction, effectively reducing the damage to the relevant film layers of the folding area CC of the display panel 10 caused by the stress generated in the folding area CC when the display panel 10 is folded.

[0101] In some embodiments, such as Figure 14 As shown, the second groove 5 is a strip-shaped groove 51, and the extension direction of the second groove 5 is consistent with the extension direction of at least one folding area CC; and / or, the protrusion 6 is a strip-shaped protrusion 61, and the extension direction of the protrusion 6 is consistent with the extension direction of at least one folding area CC.

[0102] For example, such as Figure 14 As shown, the second groove 5 can be a strip-shaped groove 51. The extension direction of the strip-shaped groove 51 is consistent with the extension direction of the folding area CC in which it is located. That is, the strip-shaped groove 51 is arranged parallel to the first groove 1 in which it is located, and the width of the strip-shaped groove 51 is smaller than the width of the first groove 1.

[0103] For example, such as Figure 14 As shown, the protrusion 6 can be a strip-shaped protrusion 61. The extension direction of the strip-shaped protrusion 61 is consistent with the extension direction of the folding area CC in which it is located. That is, the strip-shaped protrusion 61 is arranged parallel to the first groove 1 in which it is located, and the width of the strip-shaped protrusion 61 is smaller than the width of the first groove 1.

[0104] In some embodiments, such as Figure 13 As shown, the shape of the second groove 5 and / or protrusion 6 can be a prism and / or pyramid and / or a cylindrical and / or hemispherical shape, etc., which are not limited in this disclosure.

[0105] In some embodiments, such as Figure 15 As shown, at least one first groove 1 includes a bottom surface 1-1 and a side surface 1-2 connected to the bottom surface 1-1; the side surface 1-2 is curved or inclined; or, the side surface 1-2 is perpendicular to the bottom surface 1-1, and there is a rounded corner 3 between the side surface 1-2 and the bottom surface 1-1 and / or, there is a rounded corner 3 between the side surface 1-2 and the first surface 151-1 of the rigid substrate 151. This arrangement facilitates a smooth transition of the first groove 1 on the first surface 151-1 of the rigid substrate 151, avoiding sharp edges and corners, thereby increasing the probability of damage to the rigid substrate 151 from impacts.

[0106] Some embodiments of this disclosure also provide a method for manufacturing a display panel, such as... Figure 16 As shown, it includes:

[0107] S1. A rigid substrate is provided, the rigid substrate including opposing first and second surfaces, and the rigid substrate including at least one folded area;

[0108] S2. At least one first groove is formed on the first surface of the rigid substrate, and the first groove is correspondingly disposed in the folded area;

[0109] S3. An organic material layer is formed on one side of the first surface of the rigid substrate. The organic material layer fills at least one first groove, and the boundary of the organic material layer extends outward by a predetermined distance relative to the boundary of the rigid substrate, and covers at least one side of the rigid substrate to form a substrate.

[0110] S4. A display functional layer is formed on one side of the substrate.

[0111] 'Corresponding setting' can be interpreted as the first groove 1's orthogonal projection on the rigid substrate 151 completely covering the folding area CC, partially covering the folding area CC, or completely falling into the folding area CC. The positional relationship is not limited, as long as bending at this position can be achieved.

[0112] For example, the rigid substrate 151 may be a glass substrate 151. Some embodiments of this disclosure are described with the rigid substrate 151 being a glass substrate 151.

[0113] For example, in step S2, at least one first groove 1 is formed on the first surface 151-1 of the rigid substrate 151, and the first groove 1 is correspondingly disposed in the folded area CC. Specific steps may include (e.g.) Figure 17 As shown):

[0114] S21. Coat the surface of the glass substrate 151 with a photoresist material 7, such as photoresist.

[0115] S22. Exposure and development of photoresist material 7: For example, optical irradiation can be used to transfer a specific pattern from a photomask, such as a film or stencil, onto a glass substrate 151 through photoresist material 7.

[0116] S23. The area of ​​the glass substrate 151 not covered by the photoresist material 7 is thinned by chemical etching to form at least one first groove 1.

[0117] S24. Remove the photoresist material 7.

[0118] To ensure a smooth transition of the first groove 1 on the first surface 151-1 of the glass substrate 151, the following steps can be added:

[0119] S25. Etch the first groove 1 on the first surface 151-1 of the glass substrate 151, for example, by dry etching, and etch the sharp corners of the first groove 1.

[0120] For example, the side surface 1-2 of the first groove 1 can be etched as an arc surface or a slope surface; or the first groove 1 can be etched such that the side surface 1-2 is perpendicular to the bottom surface 1-1, and there is a rounded corner 3 between the side surface 1-2 and the bottom surface 1-1 and / or there is a rounded corner 3 between the side surface 1-2 and the first surface 151-1 of the glass substrate 151.

[0121] To improve the strength of the glass substrate 151, the following steps can be added after S25 (e.g. Figure 18 As shown):

[0122] S26. The glass substrate 151 is formed and strengthened. S26 includes:

[0123] S261. Multiple glass substrates 151 forming at least one first groove 1 are stacked and placed, and adjacent glass substrates 151 are bonded together using an adhesive, such as photosensitive adhesive.

[0124] S262. Place a cover plate 104' on the top and bottom of the stacked glass substrate 151 (to prevent the glass substrate 151 from being scratched during subsequent edge trimming);

[0125] S263. Cut the stacked glass substrate 151 to a set size;

[0126] S264. The cut and stacked glass substrate 151 is edge-ground to form the desired shape;

[0127] S265. The stacked glass substrate 151 after edge grinding is placed into an etching solution, such as hydrofluoric acid solution, to etch the edges of the stacked glass substrate 151 (etching the micro-cracks caused by cutting the glass substrate 151 at the edge, removing the defects at the edge of the glass substrate 151, and reducing the risk of the glass substrate 151 breaking due to edge defects).

[0128] S266. Separate the stacked glass substrates 151 after edge etching (utilize the property that the adhesion of photosensitive adhesive weakens after light exposure to reduce the adhesion of photosensitive adhesive, and then separate each glass substrate 151).

[0129] S267. The separated glass substrate 151 is placed in a tempering solution, such as a potassium nitrate solution, for tempering (K+ has a larger radius than Na+, and K+ in the potassium nitrate solution replaces Na+ on the surface of the glass substrate 151, increasing the stress on the surface of the glass substrate 151 and improving the strength of the glass substrate 151).

[0130] S268. The strengthened glass substrate 151 is placed in an etching solution, such as a hydrofluoric acid solution, for etching (to remove defects on the surface of the strengthened glass substrate 151).

[0131] Exemplarily, in step S3, an organic material layer 152 is formed on one side of the first surface 151-1 of a rigid substrate 151, such as a glass substrate 151. The organic material layer 152 fills at least one first groove 1, and the boundary of the organic material layer 152 extends outward by a predetermined distance relative to the boundary of the rigid substrate 151, covering at least one side of the rigid substrate 151 to form a substrate 15. Specific steps may include (e.g.) Figure 19A , Figure 19B As shown):

[0132] S31. The formed single glass substrate 151 is attached to the carrier 41 coated with adhesive 43, with the first surface 151-1 where the first groove 1 is located facing upward; the adhesive 43 is used to fix, support and protect the glass substrate 151.

[0133] S32. Apply organic material to the first surface 151-1 of the glass substrate 151 and fill the first groove 1.

[0134] For example, a coating process is used to apply organic material to the first surface 151-1 of the glass substrate 151 using the discharge device 42. The organic material fills the first groove 1 and wraps the edge of the glass substrate 151.

[0135] S33. The organic material film is cut and shaped to form an organic material layer 152. The boundary of the organic material layer 152 extends outward from the boundary of the glass substrate 151 by a predetermined distance, for example, extending outward by 50um to 200um (the numerical limit is not strictly defined, and the value within the acceptable deviation range is acceptable, for example, fluctuating up or down by 5%), for example, extending outward by 50um, 60um, 80um, 90um, 100um, 110um, 120um, 130um, 140um, 150um, 160um, 170um, 180um, or 200um, and covering at least one side of the glass substrate 151, for example, all four sides.

[0136] S34. Forming substrate 15, packaging and shipping multiple substrates, the formed substrate 15 as follows: Figure 20 As shown.

[0137] The display panel 10 obtained by the above preparation method can achieve the function of folding and has good impact resistance, compression resistance, and film printing resistance.

[0138] In some embodiments, the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 includes a binding bending region DD; such as Figure 21 As shown, the method for preparing the display panel further includes: S3-1, after forming an organic material layer on one side of the first surface of the rigid substrate, forming a blind groove in the portion of the organic material layer that extends outward relative to the rigid substrate, for example, the blind groove can be made by photolithography; the blind groove is disposed on the side of the organic material layer away from the display functional layer, and is correspondingly disposed in the bonding bending area.

[0139] 'Corresponding setting' can be interpreted as the orthographic projection of blind groove 2 on organic material layer 152 completely covering the binding bending area DD, partially covering the binding bending area DD, or completely falling into the binding bending area DD. The positional relationship is not limited, as long as a smaller bending radius is achieved at this position.

[0140] Some embodiments of this disclosure also provide a display module 100, such as Figure 22 As shown, it includes the display panel 10 described above and the driver chip 4 connected to the display panel 10; the display panel 10 includes a display surface a and a non-display surface b; as Figure 10 , Figure 11 As shown, the driver chip 4 is disposed on the portion of the organic material layer 152 of the display panel 10 that extends outward relative to the rigid substrate 151, and is disposed on the display surface a side of the display panel 10; as Figure 22 As shown, the driving chip 4 is configured to bend to the non-display surface b side of the display panel 10 along with the portion of the organic material layer 152 extending outward relative to the rigid substrate 151.

[0141] The binding bending area DD is located on the part of the organic material layer 152 of the substrate 15 that extends outward relative to the rigid substrate 151. Because the organic material layer 152 has good flexibility and bendable characteristics, the driving chip 4 can be bent to the non-display surface b side of the display panel 10, thereby realizing the narrow bezel design of the display panel 10.

[0142] The display module 100, including the display panel 10 mentioned above, can be folded, and can also be designed with a narrow bezel. It also has good resistance to impact, compression, and film printing.

[0143] In some embodiments, such as Figure 23 As shown, the display module 100 also includes a cover plate 104 and a metal support layer 101; the cover plate 104 is disposed on the display surface a side of the display panel 10; the metal support layer 101 is disposed on the side of the display panel 10 away from the cover plate 104. The metal support layer 101 is used to support the display panel 10, further improving the anti-molding effect of the display module 100.

[0144] Some embodiments of this disclosure also provide a display device, including the display module 100 described above.

[0145] The display device including the display module 100 mentioned above can realize the folding function, can also realize the narrow bezel design of the display device, and has good impact resistance, compression resistance, and film printing resistance.

[0146] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0147] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, It includes at least one folded area and multiple non-folded areas, wherein one of the folded areas is located between two adjacent non-folded areas; The display panel includes: Base; The display function layer is located on one side of the substrate; The substrate includes: A rigid substrate includes a first surface and a second surface opposite to each other. The first surface is provided with at least one first groove, which is correspondingly disposed in the folding area. The rigid substrate is capable of being folded at the position of the at least one first groove. An organic material layer is disposed on one side of the first surface of the rigid substrate and fills the at least one first groove. The boundary of the organic material layer extends outward by a predetermined distance relative to the boundary of the rigid substrate and covers at least one side of the rigid substrate.

2. The display panel according to claim 1, characterized in that, The rigid substrate is a glass substrate, a sapphire substrate, or a quartz substrate.

3. The display panel according to claim 1, characterized in that, The distance between the bottom surface of the at least one first groove, which is closest to the second surface of the rigid substrate, and the second surface of the rigid substrate ranges from 50µm to 100µm.

4. The display panel according to claim 1, characterized in that, The boundary of the orthographic projection of the display functional layer onto the substrate surrounds at least one boundary of the rigid substrate.

5. The display panel according to claim 4, characterized in that, The display functional layer is disposed on one side of the rigid substrate; the portion of the organic material layer extending outward relative to the rigid substrate is flush with the second surface of the rigid substrate near the surface of the display functional layer.

6. The display panel according to claim 4, characterized in that, The display functional layer is disposed on one side of the organic material layer; the display panel also includes a protective layer located on the side of the substrate away from the display functional layer.

7. The display panel according to any one of claims 1 to 6, characterized in that, The display panel further includes a bonding bending area, wherein the portion of the organic material layer extending outward relative to the rigid substrate is an extension of the organic material layer; the bonding bending area corresponds to a portion of the extension of the organic material layer. The extension portion of the organic material layer is provided with a blind groove, which is located on the side of the organic material layer away from the display function layer and is correspondingly located in the bonding bending area.

8. The display panel according to claim 7, characterized in that, The ratio of the depth of the blind groove to the thickness of the portion of the organic material layer extending outward relative to the rigid substrate is in the range of 0.6 to 0.

9.

9. The display panel according to any one of claims 1 to 6, characterized in that, The bottom surface of the at least one first groove is provided with a plurality of second grooves and / or a plurality of protrusions.

10. The display panel according to claim 9, characterized in that, The second groove is a strip-shaped groove, and the extending direction of the second groove is consistent with the extending direction of the at least one folded area; And / or, the protrusion is a strip-shaped protrusion, and the extending direction of the protrusion is consistent with the extending direction of the at least one folded area.

11. The display panel according to claim 9, characterized in that, The second groove and / or the protrusion are shaped as prisms and / or pyramids and / or cylindrical and / or hemispheres.

12. The display panel according to any one of claims 1 to 6, characterized in that, The at least one first groove includes a bottom surface and a side surface connected to the bottom surface; the side surface is shaped as an arc or a slope; or, the side surface is perpendicular to the bottom surface, and there is a rounded corner between the side surface and the bottom surface and / or, there is a rounded corner between the side surface and the first surface of the rigid substrate.

13. A method for manufacturing a display panel, characterized in that, include: A rigid substrate is provided, the rigid substrate including opposing first and second surfaces, the rigid substrate including at least one folded region; At least one first groove is formed on the first surface of the rigid substrate, and the first groove is correspondingly disposed in the folded area; An organic material layer is formed on one side of the first surface of the rigid substrate. The organic material layer fills the at least one first groove, and the boundary of the organic material layer extends outward by a predetermined distance relative to the boundary of the rigid substrate, and covers the periphery of the rigid substrate to form a substrate. A display functional layer is formed on one side of the substrate.

14. The method for manufacturing a display panel according to claim 13, characterized in that, The portion of the organic material layer extending outward relative to the rigid substrate includes a bonding bending area; The method for manufacturing the display panel further includes: after forming the organic material layer on one side of the first surface of the rigid substrate, forming a blind groove in the portion of the organic material layer that extends outward relative to the rigid substrate, wherein the blind groove is disposed on the side of the organic material layer away from the display functional layer and is correspondingly disposed in the bonding bending area.

15. A display module, characterized in that, include The display panel according to any one of claims 1 to 12, wherein the display panel includes a display surface and a non-display surface; The driver chip connected to the display panel; The driving chip is disposed on the portion of the organic material layer of the display panel that extends outward relative to the rigid substrate, and is disposed on the display surface side of the display panel; the driving chip is configured to bend along the portion of the organic material layer that extends outward relative to the rigid substrate to the non-display surface side of the display panel.

16. The display module according to claim 15, characterized in that, The display module also includes: A cover plate is disposed on one side of the display surface of the display panel; A metal support layer is disposed on the side of the display panel away from the cover plate.

17. A display device, characterized in that, Includes the display module as described in any one of claims 15 to 16.

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