Display panel, fabrication method for display panel, display module, and display device

Abstract

Provided is a display panel. The display panel comprises at least one folding area and a plurality of non-folding areas, and one folding area is located between two adjacent non-folding areas. The display panel comprises: a substrate and a display functional layer located on one side of the substrate; the substrate comprises a rigid base material and an organic material layer, the rigid base material has a first surface and a second surface which are opposite to each other, the first surface is provided with at least one first groove, the first groove is correspondingly arranged 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, and the boundary of the organic material layer extends outwards by a set distance relative to the boundary of the rigid base material and covers at least one edge of the rigid base material.

Description

Display panel, display panel manufacturing method, display module and display device

[0001] This application claims priority to Chinese Patent Application No. 202410571625.7, filed on May 9, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a display panel, a display panel manufacturing method, a display module and a display device. BACKGROUND

[0003] At present, display panels, such as OLED (Organic Light-Emitting Diode) display panels or QLED (Quantum Dot Light Emitting Diodes) display panels, etc., have been widely used in various display products such as mobile phones, tablets, computers and televisions due to their self-luminous characteristics.

[0004] In recent years, with the progress of technology and the continuous improvement of user demand, folding screen related products have gradually become the new darling of the market. Folding screen related products have attracted the attention of countless consumers with their flexible use and innovative design. SUMMARY

[0005] Some embodiments of the present disclosure provide a display panel, comprising at least one folding area and a plurality of non-folding areas, one folding area being located between two adjacent non-folding areas; the display panel comprises a substrate and a display functional layer located on one side of the substrate; the substrate comprises a rigid substrate and an organic material layer, the rigid substrate comprises opposite first and second surfaces, the first surface is provided with at least one first groove, the first groove is arranged corresponding to the folding area, and the rigid substrate can be folded at the position of the at least one first groove; the organic material layer is arranged on the 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 certain distance compared to the boundary of the rigid substrate, and at least one side of the rigid substrate is covered.

[0006] In some embodiments, the rigid substrate is a glass substrate, a sapphire substrate or a quartz substrate.

[0007] In some embodiments, the distance between the bottom surface of the at least one first groove closest to the position of the second surface of the rigid substrate and the second surface of the rigid substrate ranges from 50um to 100um.

[0008] In some embodiments, the boundary of the orthographic projection of the display functional layer on the substrate surrounds at least one boundary of the rigid substrate.

[0009] In some embodiments, the display functional layer is disposed on one side of the rigid substrate; and a portion of the organic material layer extending outward relative to the rigid substrate is flush with the second surface of the rigid substrate.

[0010] In some embodiments, the display functional layer is disposed on one side of the organic material layer; and the display panel further comprises a protective layer disposed on the substrate away from the display functional layer.

[0011] In some embodiments, the display panel further comprises a binding bending area; the portion of the organic material layer extending outward relative to the rigid substrate is an extension of the organic material layer; the binding bending area corresponds to a portion of the extension of the organic material layer; and the extension of the organic material layer is provided with a blind groove, which is disposed on the side of the organic material layer away from the display functional layer and corresponds to the binding bending area.

[0012] 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.

[0013] In some embodiments, the bottom surface of the at least one first groove is provided with a plurality of second grooves and / or a plurality of protrusions.

[0014] In some embodiments, the second grooves are strip-shaped grooves, and the extension direction of the second grooves is consistent with the extension direction of the at least one folding area; and / or, the protrusions are strip-shaped protrusions, and the extension direction of the protrusions is consistent with the extension direction of the at least one folding area.

[0015] In some embodiments, the second grooves and / or the protrusions are in the shape of a prism and / or a pyramid and / or a cylinder and / or a hemisphere.

[0016] In some embodiments, the at least one first groove comprises a bottom surface and a side surface connected to the bottom surface; the side surface is in the shape of an arc surface or an inclined surface; or, the side surface is perpendicular to the bottom surface, and the side surface and the bottom surface have a fillet angle and / or the side surface and the first surface of the rigid substrate have a chamfer angle.

[0017] Some embodiments of the present disclosure further provide a preparation method of a display panel, comprising: S1, providing a rigid substrate, the rigid substrate comprising opposite first and second surfaces, and the rigid substrate comprising at least one folding area; S2, forming at least one first groove on the first surface of the rigid substrate, the first groove being correspondingly disposed in the folding 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 certain distance compared to the boundary of the rigid substrate and covering the periphery of the rigid substrate to form a substrate; and S4, forming a display functional layer on one side of the substrate.

[0018] In some embodiments, the part of the organic material layer extending outward relative to the rigid substrate comprises a binding bending area; the method for manufacturing the display panel further comprises: after forming the organic material layer on the first surface side of the rigid substrate, forming a blind groove on the part of the organic material layer extending outward relative to the rigid substrate, the blind groove being arranged on the side of the organic material layer away from the display functional layer and corresponding to the binding bending area.

[0019] Some embodiments of the present disclosure further provide a display module, comprising the display panel described above and a driving chip connected with the display panel; the display panel comprises a display surface and a non-display surface; the driving chip is arranged on the part of the organic material layer extending outward relative to the rigid substrate of the display panel and 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 part of the organic material layer extending outward relative to the rigid substrate.

[0020] In some embodiments, the display module further comprises a cover plate and a metal support layer; the cover plate is arranged on the display surface side of the display panel; the metal support layer is arranged on the side of the display panel away from the cover plate.

[0021] Some embodiments of the present disclosure further provide a display device, comprising the display module described above. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the drawings needed to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only some of the drawings of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limited to the actual size, actual process, actual time sequence, etc. of the products involved in the embodiments of the present disclosure.

[0023] FIG. 1 is a cross-sectional view of a display module provided by some embodiments;

[0024] FIG. 2 is another cross-sectional view of a display module provided by some embodiments;

[0025] FIG. 3 is still another cross-sectional view of a display module provided by some embodiments;

[0026] FIG. 4 is still another cross-sectional view of a display module provided by some embodiments;

[0027] FIG. 5 is a plan view of a display panel provided by some embodiments of the present disclosure;

[0028] FIG. 6 is a cross-sectional view of a display panel provided by some embodiments of the present disclosure;

[0029] FIG. 7 is a cross-sectional view of a substrate according to some embodiments of the present disclosure;

[0030] FIG. 8 is a plan view of a substrate according to some embodiments of the present disclosure;

[0031] FIG. 9 is another plan view of a display panel according to some embodiments of the present disclosure;

[0032] FIG. 10 is another cross-sectional view of a display panel according to some embodiments of the present disclosure;

[0033] FIG. 11 is another cross-sectional view of a display panel according to some embodiments of the present disclosure;

[0034] FIG. 12 is another cross-sectional view of a substrate according to some embodiments of the present disclosure;

[0035] FIG. 13 is a cross-sectional view of a second groove or protrusion according to some embodiments of the present disclosure;

[0036] FIG. 14 is a top view of a first groove according to some embodiments of the present disclosure;

[0037] FIG. 15 is a cross-sectional view of a first groove according to some embodiments of the present disclosure;

[0038] FIG. 16 is a flow chart of a process of manufacturing a display panel according to some embodiments of the present disclosure;

[0039] FIG. 17 is a diagram of a manufacturing step of a rigid substrate according to some embodiments of the present disclosure;

[0040] FIG. 18 is another diagram of a manufacturing step of a rigid substrate according to some embodiments of the present disclosure;

[0041] FIG. 19A is a diagram of a manufacturing step of a substrate according to some embodiments of the present disclosure;

[0042] FIG. 19B is a diagram of a manufacturing step of a substrate according to some embodiments of the present disclosure;

[0043] FIG. 20 is another cross-sectional view of a substrate according to some embodiments of the present disclosure;

[0044] FIG. 21 is another flow chart of a process of manufacturing a display panel according to some embodiments of the present disclosure;

[0045] FIG. 22 is another cross-sectional view of a display module according to some embodiments of the present disclosure;

[0046] FIG. 23 is another cross-sectional view of a display module according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0047] In the following, the technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all. Based on the embodiments provided by the present disclosure, all other embodiments obtained by a person of ordinary skill in the art are within the scope of protection of the present disclosure.

[0048] Unless otherwise required by context, the term "comprises" or "comprising" throughout the specification and claims, is to be construed as an open, non-limiting term meaning "including, but not limited to". In describing the embodiments of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular feature, structure, material, or characteristic following such terms is included in at least one embodiment or example of the present disclosure. The illustrative representations of the above terms do not necessarily indicate a same embodiment or example. In addition, the particular features, structures, materials, or characteristics described can be included in any suitable way in one or more embodiments or examples.

[0049] In the following, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0050] "A, B, and C at least one of" has the same meaning as "at least one of A, B, or C", and includes the following combinations of A, B, and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C.

[0051] "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0052] As used herein, "parallel," "perpendicular," "equal" include the recited condition and conditions approximating the recited condition within an acceptable range of deviation, where the acceptable range of deviation is as determined by one of ordinary skill in the art taking into account the measurement at issue and the error associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, "parallel" includes absolute parallel and near parallel, where near parallel can have an acceptable range of deviation of, for example, within 5°; "perpendicular" includes absolute perpendicular and near perpendicular, where near perpendicular can also have an acceptable range of deviation of, for example, within 5°. "Equal" includes absolute equality and near equality, where near equality can have an acceptable range of deviation of, for example, a difference between the two that is less than or equal to 5% of either. Numerical limits are not strictly confined to the recited numerical values, but rather the numerical values are included within an acceptable range of deviation that is around the recited numerical value, for example, plus or minus 5%.

[0053] It should be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers can also be present.

[0054] Exemplary embodiments are described herein with reference to cross-sectional and / or plan view illustrations that are idealized examples. In the drawings, the thickness of layers and regions are exaggerated for clarity. Accordingly, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the particular shapes of regions as illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region illustrated as a rectangle will typically have rounded or curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the exemplary embodiments.

[0055] As shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, in some embodiments, the display module 100 can be stacked from bottom to top with a display panel 10, a polarizer 102, an adhesive material 103, and a cover plate 104. As shown in FIG. 1 and FIG. 2, the display module 100 can further include a metal support layer 101 disposed on a side of the display panel 10 away from the cover plate 104. As shown in FIG. 1 and FIG. 3, the display panel 10 can include a flexible substrate 11 and a substrate protection layer 13 protecting the flexible substrate 11, or as shown in FIG. 2 and FIG. 4, the display panel 10 can include a rigid substrate 14, such as glass.

[0056] As shown in FIG. 1, the flexible substrate 11 provides a bearing basis for other film layer structures in the display panel 10, i.e., other film layer structures in the display panel 10, such as the display functional layer 12, are made on the flexible substrate 11. The material of the flexible substrate 11 is usually 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 of the flexible substrate 11 has been widely used in foldable display products; as shown in FIG. 3, the display panel 10 made of the flexible substrate 11 can be designed with a pad bending structure to achieve a narrow frame design of the display panel 10.

[0057] In some embodiments, polyimide (PI) or saturated polyester (PET) with good flexibility is used as the bearing to make a flexible substrate. The use of the flexible substrate can achieve folding, bending, etc., so that the display panel 10 can achieve foldable function and narrow frame design.

[0058] In some embodiments, a rigid substrate is used as the bearing. As the folding time of the foldable display product becomes longer and the folding frequency becomes higher, when the foldable display product is unfolded from the folded state, the folded area is not prone to wrinkle phenomenon and does not have obvious creases, and the display screen of the display product can be easily restored or returned to a flat state, having good crease recovery performance. Further, the impact resistance, extrusion resistance, film printing resistance, etc. of the back of the display panel 10 can be enhanced. In order to make the back of the display panel 10 have good impact resistance, extrusion resistance, film printing resistance, etc., as shown in FIG. 2, the display panel 10 can use a rigid substrate 14, such as glass.

[0059] As shown in FIG. 5, some embodiments of the present disclosure provide a display panel 10, which includes at least one folding area CC, a plurality of non-folding areas NN, and one folding area CC located between two adjacent non-folding areas NN; as shown in FIG. 6, the display panel 10 includes a substrate 15 and a display functional layer 12 located on one side of the substrate 15; as shown in FIG. 7, the substrate 15 includes a rigid base material 151 and an organic material layer 152, the rigid base material 151 includes a first surface 151-1 and a second surface 151-2 opposite to each other, the first surface 151-1 is provided with at least one first groove 1, the first groove 1 is arranged in the folding area CC, and the rigid base material 151 can be folded at the position of the at least one first groove 1; the organic material layer 152 is arranged on the side of the first surface 151-1 of the rigid base material 151 and fills the at least one first groove 1, the boundary of the organic material layer 152 extends outward by a certain distance compared with the boundary of the rigid base material 151, and at least one side of the rigid base material 151 is covered. 'Corresponding arrangement' can be explained as that the orthographic projection of the first groove 1 on the rigid base material 151 completely covers the folding area CC, partially covers the folding area CC, or completely falls into the folding area CC, and the positional relationship is not limited, and the bending at this position can be realized.

[0060] In some embodiments, the first groove 1 is a blind hole; in other embodiments, the first groove is one through hole or a plurality of through holes.

[0061] Exemplarily, the display panel 10 can be an OLED (Organic Light-Emitting Diode) display panel 10, a Micro OLED (Micro Organic Light-Emitting Diode) display panel 10, a QLED (Quantum Dot Light Emitting Diodes) display panel 10, a Mini LED (Mini Light-Emitting Diode) display panel 10, or a Micro LED (Micro Light-Emitting Diode) display panel 10, etc., and some embodiments of the present disclosure are described by taking the OLED display panel 10 as an example.

[0062] Exemplarily, as shown in FIG. 5, the display panel 10 can include a display area AA and a peripheral area BB surrounding the display area AA, the display area AA is provided with a plurality of sub-pixels arranged in an array, and the peripheral area BB is provided with signal lines such as a clock signal line (CLK line), a trigger signal line (STV line), and the like. The display panel 10 can further include at least one folding area CC and a plurality of non-folding areas NN. Exemplarily, a plane in which the display panel 10 is located includes a first direction X and a second direction Y which intersect, for example, the first direction X and the second direction Y are perpendicular, the first direction X is a row direction of the arrangement of the sub-pixels, and the second direction Y is a column direction of the arrangement of the sub-pixels. For example, the at least one folding area CC and the plurality of non-folding areas NN are arranged along the second direction Y, and the folding area CC extends along the first direction X; for another example, the at least one folding area CC and the plurality of non-folding areas NN are arranged along the first direction X, and the folding area CC extends along the second direction Y; one folding area CC can include part of the display area AA and part of the peripheral area BB, and the display panel 10 is folded at the position of the folding area CC, for example, the display panel 10 can be folded towards the side of the display surface; for another example, the display panel 10 can be folded towards the side of the non-display surface; the position of the folding area CC can be set according to the actual product, which is not limited in the present disclosure. One folding area CC divides the remaining area of the display panel 10 into two non-folding areas NN; a plurality of folding areas CC divide the remaining area of the display panel 10 into a plurality of non-folding areas NN, and one folding area CC is located between two adjacent non-folding areas NN. It can be understood that some embodiments of the present disclosure can have only one folding area CC, or can have a plurality of folding areas CC, which is not limited in the present disclosure.

[0063] Exemplarily, as shown in FIG. 6, 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 is a bearing base for other film layer structures in the display panel 10, for example, the display functional layer 12. The display functional layer 12 can include a driving circuit layer 121, a light-emitting layer 122, an encapsulation layer 123, and the like which are arranged in a stack.

[0064] Exemplarily, as shown in FIG. 7, the substrate 15 includes a rigid base material 151 and an organic material layer 152, and the structure of the substrate will be described in detail below.

[0065] It should be noted that the "rigidity" in the rigid base material 151 described in the present disclosure refers to the ability of the material not to be easily deformed under external force.

[0066] Specifically, the rigid substrate 151 has good effects of impact resistance, extrusion resistance, and film printing resistance. In order to improve the effects of impact resistance, extrusion resistance, and film printing resistance of the back surface of the display panel 10, the rigid substrate 151 can be used to manufacture the base 15 of the display panel 10. In order to realize the foldable function of the display panel 10, at least one first groove 1 can be arranged on the first surface 151-1 of the rigid substrate 151, and the first groove 1 is arranged in the folding area CC. It can be understood that one first groove 1 is arranged in one folding area CC. The “corresponding arrangement” can be explained as that the orthographic projection of the first groove 1 on the rigid substrate 151 completely covers the folding area CC, partially covers the folding area CC, or completely falls into the folding area CC, and the positional relationship is not limited, and the bending at this position can be realized.

[0067] When the display panel 10 has only one folding area CC, one first groove 1 is arranged on the first surface 151-1 of the rigid substrate 151, and the first groove 1 is arranged in the folding area CC. When the display panel 10 has multiple folding areas CC, multiple first grooves 1 are arranged on the first surface 151-1 of the rigid substrate 151, and the number of the first grooves 1 is consistent with the number of the folding areas CC, and one first groove 1 is arranged in one folding area CC. The “corresponding arrangement” can be explained as that the orthographic projection of the first groove 1 on the rigid substrate 151 completely covers the folding area CC, partially covers the folding area CC, or completely falls into the folding area CC, and the positional relationship is not limited, and the bending at this position can be realized.

[0068] The first groove 1 is arranged on the first surface 151-1 of the rigid substrate 151 and corresponds to one folding area CC of the display panel 10, which is equivalent to thinning the part of the rigid substrate 151 corresponding to the folding area CC of the display panel 10, that is, the part of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 is thinner in thickness than the part of the rigid substrate 151 corresponding to the non-folding area NN of the display panel 10. This arrangement makes the part of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 relatively weak in deformation resistance, which can be deformed under external force, so that the rigid substrate 151 can be folded at the position of the at least one 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, extrusion resistance, and film printing resistance of the rigid substrate 151, so that the display panel 10 has good crease recovery performance.

[0069] It should be noted that, as shown in FIG. 7 and FIG. 8, the boundary of the organic material layer 152 extends outward by a distance d4 compared to the boundary of the rigid substrate 151, and covers at least one side of the rigid substrate 151, which 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 on the organic material layer 152 is located within the boundary line of at least one side of the organic material layer 152. The part of the organic material layer 152 extending outward relative to the rigid substrate 151 is an extension 152-1 of the organic material layer 152; as shown in FIG. 7 and FIG. 8, the extension 152-1 of the organic material layer 152 surrounds at least one side of the rigid substrate, for example, all four sides.

[0070] Specifically, as shown in FIG. 7, the organic material layer 152 is arranged on the side of the first surface 151-1 of the rigid substrate 151 and fills at least one first groove 1, which on the one hand makes the rigid substrate 151 and the organic material layer 152 integrated, and is not easy to cause interlayer peeling between the rigid substrate 151 and the organic material layer 152, 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 distance compared to the boundary of the rigid substrate 151, and covers at least one side of the rigid substrate 151, for example, all four sides, which can play a role in protecting the rigid substrate 151. For example, as shown in FIG. 10, in the preparation process of the display panel 10, the display functional layer 12 in the display panel 10 is formed on the side of the substrate 15, and when the substrate 15 is cut and formed, or when the display functional layer 12 and the substrate 15 are cut and formed, the organic material layer 152 of at least one side of the rigid substrate 151, for example, all four sides, can be cut, so as to avoid the stress generated when the rigid substrate 151 is directly cut, which causes micro-cracks in the rigid substrate 151 and damages the rigid substrate 151, and at the same time, the reinforcing effect of the rigid substrate 151 is not destroyed; and the organic material layer 152 increases the buffer of the first surface 151-1 and all four sides of the rigid substrate 151, improves the impact resistance of the edges of the rigid substrate 151, prevents the rigid substrate 151 from being damaged by knocking, and further improves the effects of impact resistance, extrusion resistance and film printing resistance on the back of the display panel 10.

[0071] The material of the organic material layer 152 can be polyimide (PI) or saturated polyester (PET), which is not limited in the present disclosure.

[0072] The organic material layer 152 described in some embodiments of the present disclosure extends outward by a distance compared to the boundary of the rigid substrate 151, which can be designed according to the specific process of the specific actual product, which is not limited in the present disclosure.

[0073] The display panel 10 provided by some embodiments of the present disclosure has the following advantages: the substrate 15 of the display panel 10 comprises a rigid substrate 151 and an organic material layer 152; the rigid substrate 151 has good effects of impact resistance, extrusion resistance, film printing resistance, etc.; by arranging the first recess 1 on the first surface 151-1 of the rigid substrate 151 corresponding to the area of the folding area CC, the rigid substrate 151 is thinned at this position, and the rigid substrate 151 can be folded at the at least one folding area CC, so that the display panel 10 realizes the foldable function; at the same time, the organic material layer 152 is arranged on one side of the first surface 151-1 of the rigid substrate 151 and fills the at least one first recess 1, the boundary of the organic material layer 152 extends outward by a certain distance compared with the boundary of the rigid substrate 151, and at least one side of the rigid substrate 151, for example, the four sides, is covered, so that the organic material layer 152 can better protect the rigid substrate 151 from being damaged, and further improve the effects of impact resistance, extrusion resistance, film printing resistance, etc. on the back of the display panel 10.

[0074] In some embodiments, the rigid substrate 151 can be a glass substrate, for example, ultra-thin glass; the rigid substrate 151 can also be a sapphire substrate or a quartz substrate, which is not limited in the present disclosure.

[0075] In some embodiments, as shown in FIG. 7, the distance d1 between the bottom surface 1-1 of the at least one first recess 1 and the second surface 151-2 of the rigid substrate 151 at the position closest to the second surface 151-2 of the rigid substrate 151 ranges from 50 um to 100 um (the numerical limit is not strictly limited, and values within the acceptable deviation range, for example, 5% up and down, are acceptable.), that is, the distance d1 between the bottom surface 1-1 of the at least one first recess 1 and the second surface 151-2 of the rigid substrate 151 at the position closest to the second surface 151-2 of the rigid substrate 151 ranges from greater than or equal to 50 um to less than or equal to 100 um.

[0076] Exemplarily, the first groove 1 is arranged on the first surface 151-1 of the rigid substrate 151, the first groove 1 includes a bottom surface 1-1, and the distance d1 between the bottom surface 1-1 of the first groove 1 and the second surface 151-2 of the rigid substrate 151 is in a range of 50 um to 100 um, that is, the thickness of the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 is 50 um to 100 um, for example, 50 um, 55 um, 60 um, 65 um, 70 um, 75 um, 80 um, 85 um, 90 um, 95 um, etc. The setting in this range can satisfy that the portion of the rigid substrate 151, for example, the glass substrate, corresponding to the folding area CC of the display panel 10 has relatively weak anti-deformation ability, and is deformed under external force, so that the rigid substrate 151 can be folded at the position of the at least one first groove 1 to realize the foldable function of the display panel 10. At the same time, the portion of the rigid substrate 151, for example, the glass substrate, corresponding to the folding area CC of the display panel 10 retains the impact resistance, extrusion resistance and film printing resistance of the rigid substrate 151, so that the display panel 10 has good crease recovery performance.

[0077] In some embodiments, the thickness of the rigid substrate 151 can be 100 um to 300 um, the depth of the first groove 1 can be 50 um to 200 um, and the thickness of the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 can be 50 um to 100 um.

[0078] For example, the thickness of the rigid substrate 151 is 100 um, the depth of the first groove 1 is 50 um, and the thickness of the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 is 50 um. For another example, the thickness of the rigid substrate 151 is 150 um, the depth of the first groove 1 is 100 um, and the thickness of the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 is 50 um. For another example, the thickness of the rigid substrate 151 is 200 um, the depth of the first groove 1 is 100 um, and the thickness of the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 is 100 um. For another example, the thickness of the rigid substrate 151 is 250 um, the depth of the first groove 1 is 190 um, and the thickness of the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 is 60 um. For another example, the thickness of the rigid substrate 151 is 300 um, the depth of the first groove 1 is 200 um, and the thickness of the portion of the rigid substrate 151 corresponding to the folding area CC of the display panel 10 is 100 um.

[0079] In some embodiments, as shown in FIG. 9, 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.

[0080] Exemplarily, as shown in FIG. 7, the substrate 15 of the display panel 10 can be provided to include a rigid base material 151, at least one first groove 1 is provided at a first surface 151-1 of the rigid base material 151, and an organic material layer 152 is provided at the first surface 151-1 of the rigid base material 151, the organic material layer 152 fills the at least one first groove 1, and a boundary of the organic material layer 152 extends outwardly by a distance compared to a boundary of the rigid base material 151, and covers at least one side of the rigid base material 151, for example, four sides; as shown in FIG. 9, the display functional layer 12 is made on one side of the substrate 15, and a boundary of a normal projection of the display functional layer 12 on the substrate 15 is located at the part of the organic material layer 152 extending outwardly relative to the rigid base material 151 of the substrate 15, that is, the display functional layer 12 is located on the surface formed by the rigid base material 151 and the organic material layer 152, and the boundary of the normal projection of the display functional layer 12 on the substrate 15 surrounds at least one boundary of the rigid base material 151, for example, the boundary of the normal projection of the display functional layer 12 on the substrate 15 surrounds four boundaries of the rigid base material 151.

[0081] Such a setting is due to that in the preparation process of the display panel, an initial display functional layer is formed on an initial substrate, a boundary of a normal projection of the initial display functional layer on the initial substrate surrounds at least one boundary of the rigid base material, for example, the boundary of the normal projection of the display functional layer 12 on the substrate 15 surrounds four boundaries of the rigid base material 151, that is, the initial display functional layer is located on the rigid base material and extends to the extended part of the organic material layer, when the initial substrate and the initial display functional layer are cut and formed, the organic material layer 152 of at least one side of the rigid base material 151, for example, four sides, can be cut, so as to avoid damage to the rigid base material 151 caused by stress generated when the rigid base material 151 is directly cut; and the organic material layer 152 can further improve the effects of impact resistance, extrusion resistance, film printing resistance, etc. on the back of the display panel 10. In this way, after the cutting and forming process, the boundary of the normal projection of the display functional layer 12 on the substrate 15 surrounds at least one boundary of the rigid base material 151, for example, the boundary of the normal projection of the display functional layer 12 on the substrate 15 surrounds four boundaries of the rigid base material 151. Exemplarily, at least one boundary of the normal projection of the display functional layer 12 on the substrate 15 is flush with at least one boundary of the organic material layer 152.

[0082] In some embodiments, as shown in FIG. 10, the display functional layer 12 is provided on one side of the rigid base material 151; the surface of the part of the organic material layer 152 extending outwardly relative to the rigid base material 151 close to the display functional layer 12 is flush with the second surface 151-2 of the rigid base material 151.

[0083] Exemplarily, as shown in FIG. 10, the display functional layer 12 can be disposed on the side of the rigid substrate 151 of the base 15, i.e., the display functional layer 12 can be disposed on the side of the second surface 151-2 of the rigid substrate 151 of the base 15, and the organic material layer 152 of the base 15 can be used to protect the side of the rigid substrate 151 away from the display functional layer 12, i.e., the organic material layer 152 of the base 15 can be used to protect the side of the first surface 151-1 of the rigid substrate 151, further improving the effects of impact resistance, extrusion resistance, film printing resistance, etc. on the back of the display panel 10; the part 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 base 15, and the display functional layer 12 is made on the flat base 15, ensuring the yield of the finished product of the display panel 10.

[0084] In some embodiments, as shown in FIG. 11, the display functional layer 12 is disposed on the side of the organic material layer 152; the display panel 10 further includes a protective layer 16 located on the side of the base 15 away from the display functional layer 12.

[0085] Exemplarily, as shown in FIG. 11, the display functional layer 12 can be disposed on the side of the organic material layer 152 of the base 15; at this time, the side of the rigid substrate 151 of the base 15 is exposed, i.e., the side of the second surface 151-2 of the rigid substrate 151 of the base 15 is exposed, and the exposed second surface 151-2 of the rigid substrate 151 is prone to damage, so the protective layer 16 can be disposed on the side of the second surface 151-2 of the rigid substrate 151 of the base 15 away from the display functional layer 12, i.e., the protective layer 16 is disposed on the side of the base 15 away from the display functional layer 12; for example, the protective layer 16 overlaps the rigid substrate 151, and further, 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 of the second surface 151-2 of the rigid substrate 151, and ensure the yield of the finished product of the display panel 10.

[0086] The material of the protective layer 16 can be an organic material, and in some embodiments, the material of the protective layer 16 is consistent with the material of the organic material layer 152.

[0087] In some embodiments, as shown in FIG. 5, the display panel 10 further comprises a binding bending area DD, as shown in FIG. 7, FIG. 8, the part of the organic material layer 152 extending outwards relative to the rigid substrate 151 is an extension 152-1 of the organic material layer 152; the binding 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 is provided with a blind groove 2, as shown in FIG. 10, FIG. 11, the blind groove 2 is provided on the side of the organic material layer 152 away from the display functional layer 12, and is correspondingly provided in the binding bending area DD. 'Correspondingly provided' can be explained as that the orthogonal projection of the blind groove 2 on the organic material layer 152 completely covers the binding bending area DD, partially covers the binding bending area DD, or completely falls into the binding bending area DD, the positional relationship is not limited, and it can be achieved that the bending radius at this position is smaller.

[0088] Exemplarily, as shown in FIG. 6, the display panel 10 can comprise a display surface a and a non-display surface b, the side of the display functional layer 12 away from the substrate 15 is the display surface a side of the display panel 10; the side of the display functional layer 12 close to the substrate 15 is the non-display surface b side of the display panel 10. As shown in FIG. 5, the peripheral area BB of the display panel 10 can be divided into a left frame, a right frame, an upper frame and a lower frame, and the peripheral area BB of the display panel 10 can further comprise a binding bending area DD and a binding area EE connected with the binding bending area DD at the position of the lower frame of the peripheral area BB of the display panel 10, as shown in FIG. 7, FIG. 8, FIG. 9, FIG. 10, FIG. 11, the film layer of the binding area EE can be connected with the driving chip 4; the display panel 10 is bent at the binding bending area DD, and the binding area EE of the display panel 10 is bent to the non-display surface b side of the display panel 10, so as to realize the narrow frame design of the display panel 10.

[0089] It should be noted that, in order to realize the bending of the binding area EE of the display panel 10 to the non-display surface b side of the display panel 10, the impact resistance and deformation resistance of the part of the substrate 15 corresponding to the binding bending area DD need to be low, therefore the rigid substrate 151 does not extend to the binding bending area DD, and the organic material layer 152 is provided in the binding bending area DD and the binding area EE. That is, the binding 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 binding bending area DD, the display functional layer 12 of the display panel 10 can be bent with the extension 152-1 of the organic material layer 152 to the non-display surface b side of the display panel 10, so that the display panel 10 can realize the narrow frame design.

[0090] That is, the distance of the organic material layer 152 extending outward relative to the rigid substrate 151 at the lower edge of the display panel 10 is greater than the distance of the organic material layer 152 extending outward relative to the rigid substrate 151 at the left edge, the right edge, and the upper edge of the display panel 10; at the lower edge of the display panel 10, the binding bending area DD and the binding area EE are both located in a part of the extension 152-1 of the organic material layer 152.

[0091] Exemplarily, in order to realize the thin design of the display panel 10, the binding bending area DD has a smaller bending radius, as shown in FIGS. 10 and 11, a blind groove 2 can be arranged in a part of the extension 152-1 of the organic material layer 152, and the blind groove 2 is arranged on the surface of the base 15 away from the display functional layer 12. The binding bending area DD and the binding area EE are both located in a part of the extension 152-1 of the organic material layer 152; when the display panel 10 is bent at the position of the binding bending area DD, the organic material layer 152 is actually bent, and the organic material layer 152 has good flexibility, so that the organic material layer 152 can be better and more conveniently bent at the position of the binding bending area DD, thereby realizing the narrow frame design of the display panel 10; at the same time, the thickness of the part of the base 15 located at the position of the blind groove 2 is less than the thickness of the part of the base 15 located at other positions, and when the display panel 10 is bent at the position of the blind groove 2, the stress generated during the bending is smaller, the binding bending area DD can have a smaller bending radius, and the thin design of the display panel 10 is realized.

[0092] In some embodiments, as shown in FIG. 7, the ratio of the depth d2 of the blind groove 2 to the thickness d3 of the part of the organic material layer 152 extending outward relative to the rigid substrate 151 can be in the range of 0.6-0.9 (the numerical limits are not strictly limited, and values within an acceptable deviation range can be accepted, for example, floating up and down by 5%). That is, the ratio of the depth d2 of the blind groove 2 to the thickness d3 of the part 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.

[0093] Exemplarily, as shown in FIG. 7, the ratio of the depth d2 of the blind groove 2 to the thickness d3 of the part 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. Such a design can ensure that the binding bending area DD has a smaller bending radius, and at the same time, the base 15 has a relatively strong strength, so as to avoid the base 15 being broken at the position of the blind groove 2 and damaging the display panel 10.

[0094] In some embodiments, the depth d2 of the blind groove 2 can be 80-250 urn (the numerical limits are not strictly limited, and values within an acceptable deviation range, for example, floating up and down by 5%, are acceptable), and the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 can be 100-300 urn (the numerical limits are not strictly limited, and values within an acceptable deviation range, for example, floating up and down by 5%, are acceptable). For example, the depth d2 of the blind groove 2 is 80 urn, and the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 is 100 urn, in which case the thickness of the organic material layer 152 at the blind groove 2 is 20 urn; for another example, the depth d2 of the blind groove 2 is 150 urn, and the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 is 200 urn, in which case the thickness of the organic material layer 152 at the blind groove 2 is 50 urn; for another example, the depth d2 of the blind groove 2 is 200 urn, and the thickness d3 of the portion of the organic material layer 152 extending outward relative to the rigid substrate 151 is 240 urn, in which case the thickness of the organic material layer 152 at the blind groove 2 is 40 urn. When the thickness of the organic material layer 152 at the blind groove 2 can be 20-50 urn, the bending radius that can be achieved by the binding bending region DD is 0.2-1.0 mm (the numerical limits are not strictly limited, and values within an acceptable deviation range, for example, floating up and down by 5%, are acceptable).

[0095] In some embodiments, as shown in FIG. 12, the bottom surface 1-1 of the at least one first groove 1 is provided with a plurality of second grooves 5 and / or a plurality of protrusions 6.

[0096] For example, in order to fold the display panel 10 into a smaller radius, or to fold more times, as shown in FIG. 12, the bottom surface 1-1 of the first groove 1 can be provided with a plurality of second grooves 5 and / or a plurality of protrusions 6, and an enlarged view of the cross section of the plurality of second grooves 5 and / or the plurality of protrusions 6 is shown in FIG. 13. The stress generated at the folding region CC when the display panel 10 is folded can be dispersed on the plurality of second grooves 5 and / or the plurality of protrusions 6, that is, the stress generated when the display panel 10 is folded reduces the distance between the side edges of the second grooves 5 in the direction in which the stress is generated and / or reduces the distance between the top surfaces of adjacent protrusions 6 in the direction in which the stress is generated, effectively reducing the damage to the relevant film layers of the folding region CC of the display panel 10 caused by the stress generated at the folding region CC when the display panel 10 is folded.

[0097] In some embodiments, as shown in FIG. 14, the second grooves 5 are strip-shaped grooves 51, and the extension direction of the second grooves 5 is consistent with the extension direction of the at least one folding region CC; and / or, the protrusions 6 are strip-shaped protrusions 61, and the extension direction of the protrusions 6 is consistent with the extension direction of the at least one folding region CC.

[0098] Exemplarily, as shown in FIG. 14, 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 where the strip-shaped groove 51 is located, that is, the strip-shaped groove 51 is arranged in parallel with the first groove 1 where the strip-shaped groove 51 is located, and the width of the strip-shaped groove 51 is smaller than the width of the first groove 1.

[0099] Exemplarily, as shown in FIG. 14, 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 where the strip-shaped protrusion 61 is located, that is, the strip-shaped protrusion 61 is arranged in parallel with the first groove 1 where the strip-shaped protrusion 61 is located, and the width of the strip-shaped protrusion 61 is smaller than the width of the first groove 1.

[0100] In some embodiments, as shown in FIG. 13, the shape of the second groove 5 and / or the protrusion 6 can be a prism and / or a pyramid and / or a cylinder and / or a hemisphere, etc., which are not limited in the present disclosure.

[0101] In some embodiments, as shown in FIG. 15, the at least one first groove 1 includes a bottom surface 1-1 and a side surface 1-2 connected with the bottom surface 1-1; the shape of the side surface 1-2 is an arc surface or an inclined surface; or, the side surface 1-2 is perpendicular to the bottom surface 1-1, and the side surface 1-2 and the bottom surface 1-1 have a fillet 3 therebetween and / or the side surface 1-2 and the first surface 151-1 of the rigid substrate 151 have a fillet 3 therebetween. This arrangement is conducive to the smooth transition of the first groove 1 on the first surface 151-1 of the rigid substrate 151, avoiding the occurrence of sharp corners, thereby increasing the probability of damage to the rigid substrate 151 due to collision.

[0102] Some embodiments of the present disclosure also provide a preparation method of a display panel, as shown in FIG. 16, which comprises:

[0103] S1, providing a rigid substrate, the rigid substrate comprising opposite first and second surfaces, the rigid substrate comprising at least one folding area;

[0104] S2, forming at least one first groove on the first surface of the rigid substrate, the first groove being arranged in the folding area correspondingly;

[0105] 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 certain distance compared with the boundary of the rigid substrate, and covering at least one side of the rigid substrate to form a base;

[0106] S4, forming a display functional layer on one side of the base.

[0107] ‘Corresponding arrangement’ can be explained as the orthographic projection of the first groove 1 on the rigid substrate 151 completely covers the folding area CC, partially covers the folding area CC, or completely falls into the folding area CC, the positional relationship is not limited, and the bending at this position can be realized.

[0108] Exemplarily, the rigid substrate 151 can be a glass substrate 151. Some embodiments of the present disclosure are described with the rigid substrate 151 being a glass substrate 151.

[0109] Exemplarily, S2, at least one first groove 1 is formed on the first surface 151-1 of the glass substrate 151, and the first groove 1 corresponds to the folding area CC. The specific steps can be (as shown in FIG. 17) as follows:

[0110] S21, coating a photoresist material 7, for example, a photoresist, on the surface of the glass substrate 151.

[0111] S22, exposing and developing the photoresist material 7: for example, the specific pattern on the mask plate, for example, the film negative or the screen plate, can be transferred to the glass substrate 151 through the photoresist material 7 by optical irradiation.

[0112] S23, thinning the area of the glass substrate 151 not covered by the photoresist material 7 by chemical etching to form at least one first groove 1.

[0113] S24, removing the photoresist material 7.

[0114] In order to make the first groove 1 on the first surface 151-1 of the glass substrate 151 transition smoothly, the following steps can be added:

[0115] S25, etching the first groove 1 on the first surface 151-1 of the glass substrate 151, for example, dry etching, to etch the sharp corners of the first groove 1.

[0116] Exemplarily, the side surface 1-2 of the first groove 1 can be etched as an arc surface or an inclined surface; or the first groove 1 can be etched as the side surface 1-2 being perpendicular to the bottom surface 1-1, and the side surface 1-2 and the bottom surface 1-1 having a fillet 3 and / or the side surface 1-2 and the first surface 151-1 of the glass substrate 151 having a fillet 3.

[0117] In order to make the glass substrate 151 have better strength, the following steps can be added after S25 (as shown in FIG. 18):

[0118] S26, forming and strengthening the glass substrate 151. S26 includes:

[0119] S261, stacking a plurality of glass substrates 151 forming at least one first groove 1, and the adjacent glass substrates 151 are bonded by adhesive material, for example, photosensitive adhesive.

[0120] S262, placing a cover plate 104' on the top and bottom of the stacked glass substrates 151 (to prevent the glass substrates 151 from being scratched during subsequent edge cutting);

[0121] S263, cutting the stacked glass substrates 151 to a specified size;

[0122] S264, edge grinding the cut stacked glass substrates 151 to form a desired shape;

[0123] S265, placing the edge ground stacked glass substrates 151 into an etching solution, such as a hydrofluoric acid solution, to etch the edges of the stacked glass substrates 151 (to etch micro-cracks caused by cutting the glass substrates 151, remove defects on the edges of the glass substrates 151, and reduce the risk of the glass substrates 151 breaking due to edge defects);

[0124] S266, separating the edge etched stacked glass substrates 151 (using the property that the adhesion of the photosensitive adhesive decreases after being exposed to light, reducing the adhesion of the photosensitive adhesive, and then separating each glass substrate 151);

[0125] S267, placing the separated glass substrates 151 into a tempering solution, such as a potassium nitrate solution, to strengthen the glass substrates 151 (K+ has a larger radius than Na+, K+ in the potassium nitrate solution replaces Na+ on the surface of the glass substrates 151, increases the stress on the surface of the glass substrates 151, and improves the strength of the glass substrates 151);

[0126] S268, placing the strengthened glass substrates 151 into an etching solution, such as a hydrofluoric acid solution, to etch the glass substrates 151 (to remove defects on the surface of the glass substrates 151 after strengthening).

[0127] For example, S3, forming an organic material layer 152 on the first surface 151-1 of the rigid substrate 151, such as a glass substrate 151, the organic material layer 152 filling at least one first groove 1, and the boundary of the organic material layer 152 extending outward by a specified distance compared to the boundary of the rigid substrate 151, and covering at least one side of the rigid substrate 151 to form a base 15. The specific steps can be (as shown in FIGS. 19A and 19B):

[0128] S31, attaching the shaped single glass substrate 151 to the stage 41 coated with the adhesive material 43, with the first surface 151-1 where the first groove 1 is located facing upward; the adhesive material 43 is used to fix, support, and protect the glass substrate 151.

[0129] S32, coating the organic material on the first surface 151-1 of the glass substrate 151 and filling the first groove 1.

[0130] Exemplarily, the organic material is coated on the first surface 151-1 of the glass substrate 151 by using the discharging device 42 in a coating process, the organic material fills the first groove 1, and the organic material wraps the edges of the glass substrate 151;

[0131] S33, the film layer formed of the organic material is cut and formed to form the organic material layer 152, the boundary of the organic material layer 152 extends outward by a set distance compared with the boundary of the glass substrate 151, for example, extends outward by 50 um to 200 um (the numerical limit is not strictly limited, and the values within the acceptable deviation range, for example, 5% up and down, are acceptable), for example, extends outward by 50 um, 60 um, 80 um, 90 um, 100 um, 110 um, 120 um, 130 um, 140 um, 150 um, 160 um, 170 um, 180 um, 200 um, and wraps at least one edge of the glass substrate 151, for example, the four edges.

[0132] S34, the substrate 15 is formed, and a plurality of substrates are packaged and shipped, and the formed substrate 15 is shown in FIG. 20.

[0133] The display panel 10 obtained by the above preparation method can realize the folding function, and has good effects of impact resistance, extrusion resistance, and film printing resistance.

[0134] In some embodiments, the part of the organic material layer 152 extending outward relative to the rigid substrate 151 includes a binding bending area DD; as shown in FIG. 21, the preparation method of the display panel further includes: S3-1, after forming the organic material layer on the first surface side of the rigid substrate, forming a blind groove in the part of the organic material layer extending outward relative to the rigid substrate, for example, the blind groove can be made by using a photolithography process; the blind groove is arranged on the side of the organic material layer away from the display functional layer, and is arranged corresponding to the binding bending area.

[0135] ‘Corresponding arrangement’ can be explained as that the orthogonal projection of the blind groove 2 on the organic material layer 152 completely covers the binding bending area DD, partially covers the binding bending area DD, or completely falls into the binding bending area DD, and the positional relationship is not limited, and it can be realized that the bending radius at this position is smaller.

[0136] Some embodiments of the present disclosure also provide a display module 100, as shown in FIG. 22, which includes the display panel 10 described above and a driving chip 4 connected with the display panel 10; the display panel 10 includes a display surface a and a non-display surface b; as shown in FIGS. 10 and 11, the driving chip 4 is arranged on the part of the organic material layer 152 extending outward relative to the rigid substrate 151 of the display panel 10, and is arranged on the display surface a side of the display panel 10; as shown in FIG. 22, the driving chip 4 is configured to be bent to the non-display surface b side of the display panel 10 along with the part of the organic material layer 152 extending outward relative to the rigid substrate 151.

[0137] The binding bending area DD is located at the part of the organic material layer 152 of the substrate 15 extending outwardly from the relatively rigid base material 151, because the flexibility of the organic material layer 152 is better, and has the bending feature, the driving chip 4 can be bent to the non-display side b of the display panel 10, and the design of the narrow frame of the display panel 10 is realized.

[0138] The display module 100 including the display panel 10 described above can realize the folding function, and also can realize the design of the narrow frame of the display module 100, and has the better effects of anti-impact, anti-extrusion, anti-film printing, etc.

[0139] In some embodiments, as shown in FIG. 23, the display module 100 further includes a cover plate 104 and a metal support layer 101; the cover plate 104 is arranged on the display side a of the display panel 10; the metal support layer 101 is arranged 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, and further improves the effect of anti-film printing of the display module 100.

[0140] Some embodiments of the present disclosure further provide a display device including the display module 100 described above.

[0141] The display device including the display module 100 described above can realize the folding function, and also can realize the design of the narrow frame of the display device, and has the better effects of anti-impact, anti-extrusion, anti-film printing, etc.

[0142] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0143] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, any person skilled in the art can think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A display panel, comprising: At least one folding area, a plurality of non-folding areas, one folding area is located between two adjacent non-folding areas; The display panel comprises: a substrate; a display function layer located on one side of the substrate; The substrate comprises: a rigid substrate comprising opposite first and second surfaces, the first surface being provided with at least one first groove, the first groove being provided in the folding area, the rigid substrate being foldable at the position of the at least one first groove; an organic material layer provided on the side of the first surface of the rigid substrate and filling the at least one first groove, the boundary of the organic material layer extending outward from the boundary of the rigid substrate by a certain distance, and covering at least one side of the rigid substrate.

2. The display panel of claim 1, wherein, The rigid substrate is a glass substrate, a sapphire substrate or a quartz substrate.

3. The display panel of claim 1, wherein, The distance between the bottom surface of the at least one first groove and the second surface of the rigid substrate is in the range of 50-100 um.

4. The display panel of claim 1, wherein, The boundary of the orthographic projection of the display function layer on the substrate surrounds at least one boundary of the rigid substrate.

5. The display panel of claim 4, wherein, The display function layer is provided on one side of the rigid substrate; the surface of the part of the organic material layer extending outward from the rigid substrate close to the display function layer is flush with the second surface of the rigid substrate.

6. The display panel of claim 4, wherein, The display function layer is provided on one side of the organic material layer; the display panel further comprises a protective layer located on the side of the substrate away from the display function layer.

7. The display panel according to any one of claims 1 to 6, wherein The display panel further comprises a binding bending area, the part of the organic material layer extending outward from the rigid substrate is an extension of the organic material layer; the binding bending area corresponds to a part of the extension of the organic material layer; The extension of the organic material layer is provided with a blind groove, the blind groove is provided on the side of the organic material layer away from the display function layer, and corresponds to the binding bending area.

8. The display panel of claim 7, wherein, The ratio of the depth of the blind groove to the thickness of the part of the organic material layer extending outward from the rigid substrate is in the range of 0.6-0.

9.

9. The display panel according to any one of claims 1 to 6, wherein 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 of claim 9, wherein, The second groove is a strip-shaped groove, and the extension direction of the second groove is consistent with the extension direction of the at least one folding area. And / or, the protrusion is a strip-shaped protrusion, and the extension direction of the protrusion is consistent with the extension direction of the at least one folding area.

11. The display panel of claim 9, wherein, The shape of the second groove and / or the protrusion is a prism and / or a pyramid and / or a cylinder and / or a hemisphere.

12. The display panel according to any one of claims 1 to 6, wherein The at least one first groove comprises a bottom surface and a side surface connected to the bottom surface; the shape of the side surface is an arc surface or an inclined surface; or, the side surface is perpendicular to the bottom surface, and the side surface and the bottom surface have a fillet angle and / or the side surface and the first surface of the rigid substrate have a rounded corner.

13. A display panel manufacturing method, comprising: providing a rigid substrate, the rigid substrate comprising opposite first and second surfaces, the rigid substrate comprising at least one folding area; forming at least one first groove on the first surface of the rigid substrate, the first groove corresponding to the folding area; 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 certain distance compared to the boundary of the rigid substrate, and covering the periphery of the rigid substrate to form a base; forming a display function layer on one side of the base.

14. The method of producing a display panel according to claim 13, wherein, the part of the organic material layer extending outward relative to the rigid substrate comprises a binding folding area; the method for manufacturing the display panel further comprises: after forming the organic material layer on one side of the first surface of the rigid substrate, forming a blind groove on the part of the organic material layer extending outward relative to the rigid substrate, the blind groove being arranged on the side of the organic material layer away from the display function layer, and corresponding to the binding folding area.

15. A display module, comprising the display panel of any one of claims 1-12, the display panel comprising a display surface and a non-display surface; a driving chip connected to the display panel; the driving chip is arranged on the part of the organic material layer extending outward relative to the rigid substrate of the display panel, and on the side of the display surface of the display panel; the driving chip is configured to be folded to the side of the non-display surface of the display panel along with the part of the organic material layer extending outward relative to the rigid substrate.

16. The display module of claim 15, wherein, the display module further comprises: a cover plate arranged on the side of the display surface of the display panel; a metal support layer arranged on the side of the display panel away from the cover plate.

17. A display device comprising the display module of any one of claims 15-16.

Images