Display module and display device

Abstract

The present application discloses a display module and a display device. An ultra thin glass layer comprises a first sub-portion, a second sub-portion, and a third sub-portion, wherein the second sub-portion is located between the first sub-portion and the third sub-portion, the thickness of the first sub-portion is less than the thickness of the second sub-portion, and the thickness of the second sub-portion is less than the thickness of the third sub-portion; the orthographic projection of the first sub-portion on a support layer at least covers a first bending area, and the orthographic projection of an interface where the first sub-portion and the second sub-portion are connected on the support layer is located outside the first bending area.

Description

Display module and display device TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display module and a display device. BACKGROUND

[0002] With the iterative update of display technology, ultra thin glass (UTG) has been used to replace transparent polymer optical film material on the folding screen. On the one hand, after repeated bending of the folding screen, the bending area is severely creased due to the plastic deformation of the polymer film material, which affects the user experience, and the use of ultra thin glass can improve the surface texture. On the other hand, the impact resistance of the polymer film material is poor, and the strength of the screen surface is not enough, and the use of ultra thin glass can improve the strength of the screen.

[0003] In the folding screen, the ultra thin glass in the bending area is often thinned to improve the bending performance of the display module. However, after the ultra thin glass is thinned, the thickness is not uniform, and in the bending process, the bending position and the non-uniform thickness are prone to generate a large stress, which is easy to cause the film layer in the display module to peel off, resulting in a decrease in the yield and stability of the display module. SUMMARY

[0004] The embodiments of the present application provide a display module and a display device, which can reduce the stress received by the display module when bending and reduce the probability of film layer peeling in the display module.

[0005] The embodiments of the present application provide a display module, which comprises a first bending area, a non-bending area and a second bending area between the first bending area and the non-bending area, and comprises:

[0006] a display panel;

[0007] an ultra thin glass layer arranged on one side of the display panel, the ultra thin glass layer comprising a first sub part, a second sub part and a third sub part connected with each other, the second sub part being between the first sub part and the third sub part, the thickness of the first sub part being less than the thickness of the second sub part, and the thickness of the second sub part being less than the thickness of the third sub part;

[0008] a support layer arranged on the side of the display panel away from the ultra thin glass layer;

[0009] When the display module is configured in a folded state, the display panel, the ultra-thin glass layer and the support layer located in the first folding area are in a folded state, and when the display module is configured in a flattened state, the orthographic projection of the first sub-part on the support layer covers at least the first folding area, and the orthographic projection of the interface between the first sub-part and the second sub-part on the support layer is located outside the first folding area.

[0010] According to the above purposes of the present application, the embodiments of the present application further provide a display device, which comprises a display module, the display module comprising a first folding area, a non-folding area and a second folding area between the first folding area and the non-folding area, the display module comprising:

[0011] a display panel;

[0012] an ultra-thin glass layer arranged on one side of the display panel, the ultra-thin glass layer comprising a first sub-part, a second sub-part and a third sub-part connected with each other, the second sub-part being located between the first sub-part and the third sub-part, the thickness of the first sub-part being less than the thickness of the second sub-part, and the thickness of the second sub-part being less than the thickness of the third sub-part;

[0013] a support layer arranged on the side of the display panel away from the ultra-thin glass layer;

[0014] When the display module is configured in a folded state, the display panel, the ultra-thin glass layer and the support layer located in the first folding area are in a folded state, and when the display module is configured in a flattened state, the orthographic projection of the first sub-part on the support layer covers at least the first folding area, and the orthographic projection of the interface between the first sub-part and the second sub-part on the support layer is located outside the first folding area. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0016] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0017] FIG. 1 is a structural schematic diagram of a display module configured in a flattened state according to an embodiment of the present application;

[0018] FIG. 2 is a structural schematic diagram of a display module in a folded state according to an embodiment of the present application;

[0019] FIG. 3 is another structural schematic diagram of a display module in a flattened state according to an embodiment of the present application;

[0020] FIG. 4 is another structural schematic diagram of a display module in a flattened state according to an embodiment of the present application;

[0021] FIG. 5 is another structural schematic diagram of a display module in a flattened state according to an embodiment of the present application;

[0022] FIG. 6 is a structural schematic diagram of a first sub-portion of an ultra-thin glass layer according to an embodiment of the present application;

[0023] FIG. 7 is a bar chart of the relationship between the width of the first sub-portion and the stress of the adhesive layer according to an embodiment of the present application;

[0024] FIG. 8 is a bar chart of the relationship between the width of the first sub-portion and the stress of the light-emitting layer according to an embodiment of the present application;

[0025] FIG. 9 is another structural schematic diagram of a display module in a flattened state according to an embodiment of the present application;

[0026] FIG. 10 is another structural schematic diagram of a display module in a flattened state according to an embodiment of the present application;

[0027] FIG. 11 is a structural schematic diagram of an ultra-thin glass layer according to an embodiment of the present application;

[0028] FIG. 12 is another structural schematic diagram of an ultra-thin glass layer according to an embodiment of the present application;

[0029] FIG. 13 is another structural schematic diagram of an ultra-thin glass layer according to an embodiment of the present application;

[0030] FIG. 14 is another structural schematic diagram of an ultra-thin glass layer according to an embodiment of the present application;

[0031] FIG. 15 is another structural schematic diagram of an ultra-thin glass layer according to an embodiment of the present application;

[0032] FIG. 16 is another structural schematic diagram of an ultra-thin glass layer according to an embodiment of the present application;

[0033] FIG. 17 is a planar structural schematic diagram of an ultra-thin glass layer in a flattened state according to an embodiment of the present application;

[0034] FIG. 18 is a structural schematic diagram of an ultra-thin glass layer in a folded state according to an embodiment of the present application;

[0035] FIG. 19 is another structural schematic diagram of the ultrathin glass layer in a bent state according to an embodiment of the present application.

[0036] Legend of reference signs:

[0037] 10, display panel; 110, third surface; 101, third side; 20, ultrathin glass layer; 21, first sub-portion; 22, second sub-portion; 23, third sub-portion; 210, groove; 201, first surface; 202, second surface; 203, first side; 204, first side edge; 205, second side edge; 30, support layer; 301, first bending area; 302, second bending area; 303, non-bending area; 41, cover layer; 410, second side; 42, first adhesive layer; 420, air bubble; 43, composite protective layer; 44, back plate; 45, buffer layer; 46, dustproof layer; 50, bisecting line; 60, marking groove. Embodiments of the present application

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0039] Please refer to FIG. 1, the present application provides a display module, the display module includes a first bending area 301, a non-bending area 303 and a second bending area 302 between the first bending area 301 and the non-bending area 303, the display module includes a display panel 10, an ultrathin glass layer 20 and a support layer 30.

[0040] The ultrathin glass layer 20 is arranged on one side of the display panel 10, the ultrathin glass layer 20 includes a first sub-portion 21, a second sub-portion 22 and a third sub-portion 23 connected with each other, the second sub-portion 22 is between the first sub-portion 21 and the third sub-portion 23, the thickness of the first sub-portion 21 is less than the thickness of the second sub-portion 22, and the thickness of the second sub-portion 22 is less than the thickness of the third sub-portion 23; the support layer 30 is arranged on the side of the display panel 10 away from the ultrathin glass layer 20.

[0041] Further, when the display module is configured in a bent state, the display panel 10, the ultrathin glass layer 20 and the support layer 30 in the first bending area 301 are all in a bent shape, when the display module is configured in a flat state, the orthographic projection of the first sub-portion 21 on the support layer 30 covers at least the first bending area 301, and the orthographic projection of the interface between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 is located outside the first bending area 301.

[0042] In the implementation process, the first sub-part 21 is arranged to cover the first bending area 301 in the orthographic projection on the support layer 30, and the interface between the first sub-part 21 and the second sub-part 22 is arranged to be located outside the first bending area 301 in the orthographic projection on the support layer 30. That is, the position with uneven thickness in the ultra-thin glass layer 20 is arranged to be outside the first bending area 301, so as to reduce the stress of the display module in the bending process and reduce the probability of peeling of the film layer in the display module.

[0043] In an embodiment of the present application, the first bending area and the second bending area are arranged to be spaced apart, the support layer is provided with a first opening located in the first bending area and a second opening located in the second bending area, the depth of the first opening is equal to the thickness of the support layer, and the depth of the second opening is less than the thickness of the support layer.

[0044] When the display module is arranged in the flat state, the interface between the first sub-part and the second sub-part is arranged to be located between the first bending area and the second bending area in the orthographic projection on the support layer.

[0045] In an embodiment of the present application, when the display module is arranged in the flat state, the interface between the first sub-part and the second sub-part is arranged to be located between the first bending area and the second bending area in the orthographic projection on the support layer.

[0046] In an embodiment of the present application, when the display module is arranged in the flat state, the interface between the first sub-part and the second sub-part is arranged to be located between the first bending area and the second bending area in the orthographic projection on the support layer.

[0047] In an embodiment of the present application, when the display module is arranged in the flat state, the interface between the first sub-part and the second sub-part is arranged to be located between the first bending area and the second bending area in the orthographic projection on the support layer.

[0048] In an embodiment of the present application, when the display module is arranged in the flat state, the interface between the first sub-part and the second sub-part is arranged to be located between the first bending area and the second bending area in the orthographic projection on the support layer.

[0049] In an embodiment of the present application, the support layer is provided with a third opening located in the first bending area and / or the second bending area, the depth of the third opening is equal to the thickness of the support layer, or the support layer is not provided with an opening.

[0050] When the display module is configured in the flat state, the first sub-portion and the second sub-portion are connected, and the intersection interface between the first sub-portion and the second sub-portion is located in the non-bending area on the support layer.

[0051] In an embodiment of the present application, the ultra-thin glass layer is provided with a mark groove located in the non-bending area, the mark groove penetrates the ultra-thin glass layer along the thickness direction of the ultra-thin glass layer, and the mark groove is arranged at the side edge of the ultra-thin glass layer.

[0052] In an embodiment of the present application, the ultra-thin glass layer includes at least one first sub-portion, at least two second sub-portions, and at least two third sub-portions, the second sub-portions are connected to opposite sides of the first sub-portion, and the third sub-portions are connected to sides of the second sub-portions away from the first sub-portion.

[0053] In an embodiment of the present application, the first surface is provided on a side of the ultra-thin glass layer away from the display panel, and the second surface is provided on a side of the support layer close to the display panel.

[0054] At the first surface, the surface of the first sub-portion and the surface of the second sub-portion are concave relative to the surface of the third sub-portion to form a groove, and the first sub-portion and the second sub-portion connected to the first sub-portion are arranged around the groove.

[0055] At the second surface, the surface of the first sub-portion and the surface of the second sub-portion are concave relative to the surface of the third sub-portion to form the groove, and the first sub-portion and the second sub-portion connected to the first sub-portion are arranged around the groove.

[0056] In an embodiment of the present application, the thickness of the second sub-portion gradually increases along the direction of the first sub-portion close to the third sub-portion, the included angle between the side wall of the groove and the plane where the support layer is located is greater than or equal to 0.191° and less than or equal to 0.458°.

[0057] In an embodiment of the present application, the display module further includes a cover layer arranged on a side of the display panel provided with the ultra-thin glass layer, the cover layer covers at least a first side surface connected to the first surface, and the cover layer fills the groove at the first surface and / or the second surface.

[0058] In an embodiment of the present application, the cover layer covering the first side surface has a second side surface away from the one side of the ultra-thin glass layer, and the display panel has a third surface close to the one side of the ultra-thin glass layer and a third side surface connected to the third surface;

[0059] The second side surface and the third side surface are flush with each other on the same side of the display module.

[0060] Alternatively, the second side surface on the same side of the display module is recessed towards the direction close to the ultra-thin glass layer relative to the third side surface.

[0061] In an embodiment of the present application, the surface of the ultra-thin glass layer in contact with the cover layer has hydrophilicity.

[0062] In an embodiment of the present application, the display module includes a plurality of the first bending areas, and when the display module is configured in the bending state, the display panel, the ultra-thin glass layer and the support layer in at least part of the first bending areas are in a bent shape.

[0063] The ultra-thin glass layer includes a plurality of the first sub-parts, and one first sub-part corresponds to one first bending area.

[0064] The ultra-thin glass layer includes a plurality of the grooves, one groove corresponds to one first sub-part, and any groove is located on the first surface or the second surface.

[0065] In an embodiment of the present application, the absolute value of the difference between the thickness of the first sub-part and the thickness of the third sub-part has a first value, the width of the second sub-part along the direction close to the third sub-part from the first sub-part has a second value, and the ratio of the first value to the second value is greater than or equal to 1 / 300 and less than or equal to 1 / 125.

[0066] In an embodiment of the present application, the display module further includes a back plate arranged between the display panel and the support layer, a buffer layer arranged between the back plate and the support layer, and a dustproof layer arranged on the side of the support layer away from the buffer layer, and the orthographic projection of the dustproof layer on the support layer covers at least the first bending area and the second bending area.

[0067] In an embodiment of the present application, the orthographic projection of the first sub-part on the display panel is located in the coverage range of the orthographic projection of the dustproof layer on the display panel.

[0068] Specifically, in one embodiment of the present application, please continue to refer to FIG. 1, the display module includes a display panel 10, an ultra-thin glass layer 20 arranged on the light-out side of the display panel 10, a cover layer 41 arranged on the light-out side of the display panel 10 and covering the ultra-thin glass layer 20, a composite protective layer 43 arranged on the side of the ultra-thin glass layer 20 away from the display panel 10, a back plate 44 arranged on the side of the display panel 10 away from the ultra-thin glass layer 20, a buffer layer 45 arranged on the side of the back plate 44 away from the display panel 10, a support layer 30 arranged on the side of the buffer layer 45 away from the back plate 44, and a dustproof layer 46 arranged on the side of the support layer 30 away from the buffer layer 45.

[0069] In some embodiments, the display panel 10 can include a substrate and a thin film transistor layer arranged on the substrate, the thin film transistor layer being located on the side of the substrate close to the ultra-thin glass layer 20. The substrate can be a rigid substrate, such as a glass substrate, or the substrate can be a flexible substrate, such as a substrate formed of polyimide. When the substrate is a flexible substrate, the substrate can be formed of multiple sub-substrates of the same material, such as polyimide, and adjacent sub-substrates are bonded by an adhesive sub-layer.

[0070] In some embodiments, the thin film transistor layer includes a thin film transistor including a semiconductor on the substrate, the semiconductor can be formed of polycrystalline silicon or metal oxide (such as indium gallium zinc oxide). The semiconductor is divided into a channel region and a source region and a drain region formed on both sides of the channel region. The thin film transistor layer further includes a first gate insulating layer covering the semiconductor. The thin film transistor further includes a first gate formed on the first gate insulating layer, the first gate overlapping the channel region. The first gate can be formed of multiple layers or a single layer including a low-resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance. The thin film transistor layer further includes a second gate insulating layer covering the first gate. The thin film transistor further includes a second gate on the second gate insulating layer, the second gate overlapping the first gate, the second gate can be formed of multiple layers or a single layer including a low-resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance. The thin film transistor layer further includes a first interlayer insulating layer formed on the second gate. The first interlayer insulating layer and the first gate insulating layer and the second gate insulating layer include a source contact hole and a drain contact hole, and the source region and the drain region are respectively exposed through the source contact hole and the drain contact hole.

[0071] The thin film transistor further includes a source electrode and a drain electrode arranged in the same layer and formed on the first interlayer insulating layer, the source electrode is connected to the source region through the source contact hole, and the drain electrode is connected to the drain region through the drain contact hole. The source electrode and the drain electrode can be a plurality of layers or a single layer formed of a low-resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material having high corrosion resistance. For example, the source electrode and the drain electrode can be a triple layer of Ti / Cu / Ti, Ti / Ag / Ti, Ti / Al / Ti, or Mo / Al / Mo, or other single layer or multi-layer structures.

[0072] In some embodiments, the display panel 10 further includes a planar layer between the thin film transistor layer and the light-emitting layer, the planar layer covers the source electrode and the drain electrode.

[0073] In some embodiments, the display panel 10 further includes an anode layer on a side of the planar layer away from the thin film transistor layer, the anode layer includes a plurality of anodes arranged one-to-one corresponding to the pixel units. Each anode is electrically connected to the thin film transistor. The planar layer includes anode contact holes through which the anodes contact the source electrodes or the drain electrodes of the thin film transistors.

[0074] In some embodiments, the display panel 10 further includes a pixel definition layer arranged on a side of the planar layer away from the thin film transistor layer, the pixel definition layer includes pixel definition portions and openings between the pixel definition portions. The display panel 10 further includes a light-emitting layer including a plurality of pixel units. The pixel units are located in the openings. The openings expose part of the anodes and cover edges of the anodes. The pixel units can include red pixel units, green pixel units, and blue pixel units.

[0075] In some embodiments, the display panel 10 further includes a cathode layer covering the light-emitting layer. In the direction from the anode to the cathode layer, the light-emitting layer includes a hole-transporting organic layer, a light-emitting material layer, and an electron-transporting organic layer arranged in sequence. The hole-transporting organic layer can include a hole injection layer and a hole transport layer, the hole injection layer directly contacts the anode, and the hole transport layer is located between the hole injection layer and the light-emitting material layer. The hole-transporting organic layer can further include an electron blocking layer located between the hole transport layer and the light-emitting material layer. The electron-transporting organic layer can include an electron injection layer and an electron transport layer, the electron injection layer directly contacts the cathode layer, and the electron transport layer is located between the electron injection layer and the light-emitting material layer. The electron-transporting organic layer can further include a hole blocking layer located between the electron transport layer and the light-emitting layer.

[0076] In some embodiments, the display panel 10 further includes an encapsulation layer on a side of the cathode layer away from the light-emitting layer. The encapsulation layer is formed by alternately stacking a plurality of inorganic film layers and organic film layers, for example, in the direction from the substrate to the thin film transistor layer, the encapsulation layer includes a first inorganic encapsulation sub-layer, a first organic encapsulation sub-layer, and a second inorganic encapsulation sub-layer.

[0077] In some embodiments, the display panel 10 further comprises a touch layer located on the side of the encapsulation layer away from the light-emitting layer. The touch layer can implement a self-capacitive touch or a mutual-capacitive touch. When the touch layer implements a self-capacitive touch, the touch layer can have only one touch metal layer.

[0078] When the touch layer implements a mutual-capacitive touch, the touch layer comprises a first touch metal layer, a touch insulating layer, and a second touch metal layer. The touch insulating layer is located on the side of the first touch metal layer away from the encapsulation layer, and the second touch metal layer is located on the side of the touch insulating layer away from the encapsulation layer. The first touch metal layer can be directly disposed on the encapsulation layer, or a spacing layer can be further disposed between the first touch layer and the encapsulation layer. The spacing layer can comprise an inorganic spacing layer and / or an organic spacing layer. The first touch metal layer comprises a first touch electrode, a second touch electrode, and a first bridge line, and the second touch metal layer comprises a second bridge line. The first touch electrode and the second touch electrode are both metal networks. Alternatively, the second touch metal layer comprises the first touch electrode, the second touch electrode, and the first bridge line, and the first touch metal layer comprises the second bridge line.

[0079] In some embodiments, the back plate 44 is disposed on the side of the display panel 10 away from the ultra-thin glass layer 20. The material of the back plate 44 can be a material easy to bend, such as polyimide and the like, so as to facilitate maintaining the bending performance of the display module. The buffer layer 45 is disposed on the side of the back plate 44 away from the display panel 10. The material of the buffer layer 45 can be selected from a material easy to bend and having certain elasticity and flexibility, such as black polyimide and the like. The support layer 30 is disposed on the side of the buffer layer 45 away from the back plate 44. The material of the support layer 30 can be selected from a metal material having good heat dissipation performance, such as stainless steel and the like. The support layer 30 and the back plate 44 can both play a certain fixing and supporting role.

[0080] The ultra-thin glass layer 20 is disposed on the light-emitting side of the display panel 10. Since the ultra-thin glass layer 20 has a certain hardness and is easy to bend, the support performance and the bending performance of the display surface of the display module can be simultaneously satisfied.

[0081] In some embodiments, the ultra-thin glass layer 20 includes a first surface 201 away from the display panel 10, a second surface 202 close to the display panel 10, and a first side surface 203 connected to the first surface 201 and between the first surface 201 and the second surface 202; the cover layer 41 can cover the first surface 201 and / or the second surface 202, and the cover layer 41 can cover the first side surface 203; and in the embodiment shown in FIG. 1, the cover layer 41 covers part of the first surface 201, the second surface 202, and the first side surface 203, and the cover layer 41 is attached to the display panel 10 through the first adhesive layer 42.

[0082] In some embodiments, the composite protective layer 43 is arranged on the side of the ultra-thin glass layer 20 away from the display panel 10, and the composite protective layer 43 includes a second adhesive layer, a protective layer, a third adhesive layer, and a repairable layer arranged in sequence along the direction from the display panel 10 to the ultra-thin glass layer 20, wherein the repairable layer can be replaced; for example, when the surface of the repairable layer has scratches or other quality problems during use of the display module, the repairable layer can be removed and replaced with a new repairable layer to improve the quality and service life of the display module.

[0083] It should be noted that the display module provided by the embodiments of the present application is a foldable display module, and the display module includes a folded state and an unfolded state, so that the display module can be switched between the folded state and the unfolded state; when the display module is configured in the folded state, the display panel 10, the ultra-thin glass layer 20, and the support layer 30 and other film layers described in the above embodiments are in a folded state, and when the display module is configured in the unfolded state, the display panel 10, the ultra-thin glass layer 20, and the support layer 30 and other film layers described in the above embodiments are in a flat state.

[0084] In some embodiments, the display module includes a first bending area 301, a non-bending area 303, and a second bending area 302 between the first bending area 301 and the non-bending area 303; wherein the part of the display module corresponding to the first bending area 301 and the second bending area 302 is bent or curved, and the part of the display module corresponding to the non-bending area 303 is not bent or curved.

[0085] In some embodiments, the second bending area 302 is connected to the opposite sides of the first bending area 301, and the non-bending area 303 is connected to the side of the second bending area 302 away from the first bending area 301.

[0086] Specifically, please refer to FIG. 1 and FIG. 2, when the display module is configured in the folded state, the display panel 10, the ultra-thin glass layer 20 and the support layer 30 located in the first folding area 301 are in the shape of a circular arc, the display panel 10, the ultra-thin glass layer 20 and the support layer 30 arranged corresponding to the non-folding area 303 are in the shape of a straight line, and the display panel 10, the ultra-thin glass layer 20 and the support layer 30 arranged corresponding to the second folding area 302 are in the shape of a curve; and the shape of the display module in the first folding area 301 and the second folding area 302 is in the shape of a water droplet.

[0087] It should be noted that the display module in the first folding area 301 can be folded outwardly or inwardly, which is not limited herein.

[0088] In the embodiments of the present application, the ultra-thin glass layer 20 can be thinned, and the thinned area can be arranged in position with the first folding area 301 to improve the bending performance of the ultra-thin glass layer 20, while other areas of the ultra-thin glass layer 20 are not thinned to ensure the strength and support performance of the ultra-thin glass layer 20.

[0089] Specifically, the ultra-thin glass layer 20 includes a first sub-part 21, a third sub-part 23 and a second sub-part 22 connected between the first sub-part 21 and the third sub-part 23, and the thickness of the first sub-part 21 is less than the thickness of the second sub-part 22, and the thickness of the second sub-part 22 is less than the thickness of the third sub-part 23, that is, the thinned part of the ultra-thin glass layer 20 is the first sub-part 21 and the second sub-part 22.

[0090] In some embodiments, the thickness of the second sub-part 22 gradually increases in the direction of the first sub-part 21 close to the third sub-part 23, which changes smoothly; and then the thickness change of the ultra-thin glass layer 20 can play a buffering role, avoiding the occurrence of stress concentration phenomenon due to the thickness change of the ultra-thin glass layer 20, and reducing the probability of film layer peeling.

[0091] In the embodiments of the present application, the orthographic projection of the first sub-part 21 on the support layer 30 covers at least the first folding area 301, that is, the width a of the first sub-part 21 is greater than or equal to the width of the first folding area 301, and the intersection of the first sub-part 21 and the second sub-part 22 is located outside the first folding area 301.

[0092] It can be understood that the first sub-part 21 has a smaller thickness, and its bending performance is better than that of the second sub-part 22 and the third sub-part 23, and therefore, covering the first bending area 301 by the first sub-part 21 can effectively improve the bending performance of the display module; further, since the connection between the first sub-part 21 and the second sub-part 22 is a position where the thickness changes and is also a position where stress is easily generated, in the embodiment of the present application, the orthographic projection of the interface between the first sub-part 21 and the second sub-part 22 on the support layer 30 is located outside the first bending area 301, and the position where the thickness of the ultra-thin glass layer 20 is not uniform is arranged outside the first bending area 301, so as to reduce the stress received by the display module during bending and reduce the probability of peeling of the film layer in the display module.

[0093] In some embodiments, the ultra-thin glass layer 20 includes at least one first sub-part 21, at least two second sub-parts 22, and at least two third sub-parts 23, the second sub-part 22 is connected to the opposite sides of the first sub-part 21, and the third sub-part 23 is connected to the side of the second sub-part 22 away from the first sub-part 21; that is, the display module provided in the embodiment of the present application can be folded in half at the position corresponding to the first sub-part 21.

[0094] Further, in some embodiments, the support layer 30 is provided with a first opening 310 located in the first bending area 301 and a second opening 320 located in the second bending area 302, the depth of the first opening 310 is equal to the thickness of the support layer 30, and the depth of the second opening 320 is less than the thickness of the support layer 30; in the embodiment of the present application, the first opening 310 and the second opening 320 are arranged in the support layer 30 to improve the bending performance of the support layer 30, and since the bending degree or curvature of the first bending area 301 is greater than that of the second bending area 302, the depth of the first opening 310 is greater than that of the second opening 320, so that the bending performance of the support layer 30 in the first bending area 301 is stronger than that of the support layer 30 in the second bending area 302.

[0095] Since the interface between the first sub-part 21 and the second sub-part 22 is located outside the first bending area 301, the orthographic projection of the interface between the first sub-part 21 and the second sub-part 22 on the support layer 30 does not overlap the first opening 310, and the first opening 310 is a position where the thickness of the support layer 30 changes and is also a position where stress is easily generated, if the interface between the first sub-part 21 and the second sub-part 22 overlaps the first opening 310, stress concentration is more likely to occur during bending of the display module, and therefore, in the embodiment of the present application, the orthographic projection of the interface between the first sub-part 21 and the second sub-part 22 on the support layer 30 is located outside the first bending area 301, which can further reduce the stress generated during bending of the display module and reduce the probability of peeling of the film layer in the display module.

[0096] In some embodiments, the dustproof layer 46 has a projection on the support layer 30 covering at least the first bending area 301 and the second bending area 302. Since the support layer 30 has the first opening 310 and the second opening 320 in the first bending area 301 and the second bending area 302, the dustproof layer 46 covering the first bending area 301 and the second bending area 302 is arranged on the side of the support layer 30 away from the display panel 10 to prevent foreign matters such as particles from entering the display module through the first opening 310 and the second opening 320. The material of the dustproof layer 46 can include an organic resin material. Since the dustproof layer 46 is arranged corresponding to the first bending area 301 and the second bending area 302, the dustproof layer 46 can be a material with a certain flexibility.

[0097] In some embodiments, the first sub-part 21 has a projection on the display panel 10 within the projection range of the dustproof layer 46 on the display panel 10.

[0098] In an embodiment of the present application, when the display module is in the flat state, the interface between the first sub-part 21 and the second sub-part 22 has a projection on the support layer 30 not overlapping the second opening 320. The second opening 320 is also a position where the thickness of the support layer 30 changes and stress is easily generated. If the interface between the first sub-part 21 and the second sub-part 22 overlaps the second opening 320, stress concentration is more likely to occur when the display module is bent. Therefore, in the embodiment of the present application, the interface between the first sub-part 21 and the second sub-part 22 has a projection on the support layer 30 not overlapping the second opening 320, which further reduces the stress generated when the display module is bent and reduces the probability of peeling of the film layer in the display module.

[0099] In some embodiments, referring to FIG. 1, the first bending area 301 and the second bending area 302 are arranged apart from each other. When the display module is in the flat state, the interface between the first sub-part 21 and the second sub-part 22 has a projection on the support layer 30 between the first bending area 301 and the second bending area 302. At this time, the first sub-part 21 has a projection on the support layer 30 covering the first bending area 301 and extending beyond the first bending area 301 and stopping between the first bending area 301 and the second bending area 302. The second sub-part 22 has a projection on the support layer 30 partially overlapping the second bending area 302 or covering the second bending area 302.

[0100] In some embodiments, referring to FIG. 3, the first bending area 301 and the second bending area 302 are spaced apart, and when the display module is configured in a flat state, the normal projection of the junction between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 overlaps with the boundary of the second bending area 302 close to the first bending area 301; that is, the normal projection of the first sub-portion 21 on the support layer 30 covers the first bending area 301 and the area between the first bending area 301 and the second bending area 302, and stops at the boundary of the second bending area 302 close to the first bending area 301, and the normal projection of the second sub-portion 22 on the support layer 30 at least partially overlaps with the second bending area 302, or covers the second bending area 302.

[0101] In some embodiments, referring to FIG. 4, the first bending area 301 and the second bending area 302 are spaced apart, and when the display module is configured in a flat state, the normal projection of the junction between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 overlaps with the boundary of the second bending area 302 away from the first bending area 301; that is, the normal projection of the first sub-portion 21 on the support layer 30 covers the first bending area 301 and the second bending area 302, and the normal projection of the second sub-portion 22 on the support layer 30 is located on the side of the second bending area 302 away from the first bending area 301 and in the non-bending area 303.

[0102] In some embodiments, referring to FIG. 5, the first bending area 301 and the second bending area 302 are spaced apart, and when the display module is configured in a flat state, the normal projection of the junction between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 is located in the non-bending area 303; that is, the normal projection of the first sub-portion 21 on the support layer 30 covers the first bending area 301 and the second bending area 302, and extends into the second bending area 302, and the normal projection of the second sub-portion 22 on the support layer 30 is located on the side of the second bending area 302 away from the first bending area 301 and in the non-bending area 303.

[0103] In addition, in other embodiments of the present application, the first bending area 301 and the second bending area 302 are spaced apart, and when the display module is configured in a flat state, the normal projection of the junction between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 is located in the second bending area 302, that is, the normal projection of the junction between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 overlaps with the second opening 320.

[0104] Further, the embodiments of the present application provide embodiments 1 to 4 to verify the normal projection of the junction between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 in different positions, so as to obtain different stress conditions of the display module under different widths of the first sub-portion 21.

[0105] Please refer to FIG. 1, FIG. 6, FIG. 7 and FIG. 8, wherein the display module further comprises a fourth adhesive layer arranged between the display panel 10 and the back plate 44, a fifth adhesive layer arranged between the back plate 44 and the buffer layer 45, and a sixth adhesive layer arranged between the buffer layer 45 and the support layer 30.

[0106] In the embodiment 1, the normal projection of the interface at the connection between the first sub-part 21 and the second sub-part 22 on the support layer 30 is located in the first bending area 301; in the embodiment 2, the normal projection of the interface at the connection between the first sub-part 21 and the second sub-part 22 on the support layer 30 is located between the first bending area 301 and the second bending area 302; in the embodiment 3, the normal projection of the interface at the connection between the first sub-part 21 and the second sub-part 22 on the support layer 30 is located in the second bending area 302; and in the embodiment 4, the normal projection of the interface at the connection between the first sub-part 21 and the second sub-part 22 on the support layer 30 is located on the side of the second bending area 302 away from the first bending area 301.

[0107] Through bending simulation, stress column charts as shown in FIG. 7 and FIG. 8 are obtained. As shown in FIG. 7, the stress of each adhesive layer in the display module is larger in the embodiment 1 and the embodiment 3, and the stress of each adhesive layer is the largest in the embodiment 1, for example, the stress of the fifth adhesive layer and the sixth adhesive layer is much larger than that of other adhesive layers, and the stress of each adhesive layer is the smallest in the embodiment 4. In the embodiment 1 to the embodiment 3, the peeling between each film layer in the display module is prone to occur, which leads to the decrease of the quality and the yield of the display module. Further, as shown in FIG. 8, in the embodiment 1 to the embodiment 4, the stress of the light-emitting layer in the display panel is larger in the embodiment 1 and the embodiment 3, and the stress is the largest in the embodiment 1, and thus the probability of peeling is also the largest. In the embodiment 4, the stress is the smallest, and thus the probability of peeling is also the smallest.

[0108] As mentioned above, in the embodiments of the present application, the normal projection of the interface at the connection between the first sub-part 21 and the second sub-part 22 on the support layer 30 is arranged outside the first bending area 301, and thus the probability of peeling of each film layer in the display module can be effectively reduced.

[0109] Further, in the embodiments of the present application, the normal projection of the interface at the connection between the first sub-part 21 and the second sub-part 22 on the support layer 30 is arranged not to overlap with the second opening 320, and the normal projection of the interface at the connection between the first sub-part 21 and the second sub-part 22 on the support layer 30 is arranged between the first bending area 301 and the second bending area 302, or on the side of the second bending area 302 away from the first bending area 301, and thus the stress of each film layer in the display module can be further reduced, and the probability of peeling of each film layer in the display module can be reduced.

[0110] Preferably, the normal projection of the interface between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 is arranged on the side of the second bending area 302 away from the first bending area 301, so as to further reduce the stress on each film layer in the display module and reduce the probability of peeling of each film layer in the display module.

[0111] More preferably, the normal projection of the interface between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 is arranged to overlap the boundary of the side of the second bending area 302 away from the first bending area 301, so as to control the width of the first sub-portion 21 on the basis of reducing the probability of peeling of each film layer in the display module, and avoid that the width of the first sub-portion 21 is too large, which leads to that the thinning area of the ultra-thin glass layer 20 is too large, and further leads to that the supportability and strength of the ultra-thin glass layer 20 are not enough.

[0112] In another embodiment of the present application, please refer to FIG. 9, the difference between the embodiment shown in FIG. 9 and the embodiment shown in FIG. 4 is that the support layer 30 is provided with a third opening 330 located in the first bending area 301 and the second bending area 302, and the depth of the third opening 330 is equal to the thickness of the support layer 30.

[0113] In the embodiment, when the display module is configured in the flat state, the normal projection of the interface between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 overlaps the boundary of the side of the second bending area 302 away from the first bending area 301.

[0114] In other embodiments of the present application, the normal projection of the interface between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 is located in the non-bending area 303.

[0115] In other embodiments of the present application, the support layer 30 is provided with a third opening 330 located in the first bending area 301 or the second bending area 302, and the depth of the third opening 330 is equal to the thickness of the support layer 30.

[0116] In the embodiment, when the display module is configured in the flat state, the normal projection of the interface between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 overlaps the boundary of the side of the second bending area 302 away from the first bending area 301, or the normal projection of the interface between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 is located in the non-bending area 303.

[0117] In another embodiment of the present application, please refer to FIG. 10, the difference between the embodiment shown in FIG. 10 and the embodiment shown in FIG. 9 is that the support layer 30 is not provided with an opening, that is, the positions of the support layer 30 corresponding to the first bending area 301 and the second bending area 302 are not subjected to the patterning treatment.

[0118] When the display module is configured in the unfolded state, the normal projection of the interface between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 overlaps with the boundary of the second bending area 302 away from the first bending area 301.

[0119] In other embodiments of the present application, the normal projection of the interface between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 is located in the non-bending area 303.

[0120] Continuing from the above, the embodiments of the present application set the normal projection of the first sub-portion 21 on the support layer 30 to cover at least the first bending area 301, and the normal projection of the interface between the first sub-portion 21 and the second sub-portion 22 on the support layer 30 is located outside the first bending area 301; that is, the position of the uneven thickness in the ultra-thin glass layer 20 is set outside the first bending area 301, so as to reduce the stress on the display module during the bending process and reduce the probability of peeling of the film layers in the display module.

[0121] In some embodiments, since the thickness of the first sub-portion 21 and the second sub-portion 22 relative to the third sub-portion 23 is reduced, that is, the surface of the first sub-portion 21 and the surface of the second sub-portion 22 are both concave relative to the surface of the third sub-portion 23, and then a groove 210 is formed in the ultra-thin glass layer 20 at the first sub-portion 21 and the second sub-portion 22, wherein the first sub-portion 21 and the second sub-portion 22 connected to the first sub-portion 21 are arranged around the groove 210.

[0122] In some embodiments, the groove 210 can be formed at the first surface 201 and / or at the second surface 202, and the cover layer 41 fills the groove 210 at the first surface 201 and / or the second surface 202, so that the surface of the ultra-thin glass layer 20 is filled and flattened to obtain a flat surface, thereby improving the bonding yield between the ultra-thin glass layer 20, the cover layer 41 and other film layers.

[0123] The embodiments of the present application take the case where the groove 210 is formed at the first surface 201 as an example for illustration in the diagram provided by the embodiments of the present application.

[0124] In some embodiments, the surface of the first sub-portion 21 close to the display panel 10, the surface of the second sub-portion 22 close to the display panel 10, and the surface of the third sub-portion 23 close to the display panel 10 are flush, that is, the surface of the ultra-thin glass layer 20 close to the display panel 10 is a plane, and then the groove 210 is arranged at the first surface 201.

[0125] In some embodiments, since the thickness of the second sub-portion 22 gradually increases along the direction of the first sub-portion 21 close to the third sub-portion 23, that is, the thickness of the second sub-portion 22 changes smoothly, the sidewall of the groove 210 is a straight inclined surface.

[0126] It should be noted that, please refer to FIG. 11, when the angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located is too small, the width a of the second sub-part 22 in the direction of the first sub-part 21 approaching the third sub-part 23 is too large, which can cause the width of the thinned area in the ultra-thin glass layer 20 to be too large, thereby reducing the support and strength of the ultra-thin glass layer 20; and when the angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located is too large, the width a of the second sub-part 22 in the direction of the first sub-part 21 approaching the third sub-part 23 is too small, which can cause the second sub-part 22 to not sufficiently buffer the change in thickness of the ultra-thin glass layer 20, and thus easily cause the indentation phenomenon.

[0127] Therefore, the angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located and the width b of the second sub-part 22 are verified in the embodiments of the present application, and the following embodiments 5 to 9 are provided; it should be noted that only the width of the second sub-part 22 in the direction of the first sub-part 21 approaching the third sub-part 23 is adjusted in each embodiment, and thus the size of the angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located can be adjusted.

[0128] In the embodiment 5, the thickness c of the first sub-part 21 is 0.03 mm, the width b of the second sub-part 22 in the direction of the first sub-part 21 approaching the third sub-part 23 is 4 mm, the thickness d of the third sub-part 23 is 0.07 mm, and the angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located is calculated by the formula θ = arctan((d-c) / b); and the angle θ is 0.573°.

[0129] In the embodiment 6, the thickness c of the first sub-part 21 is 0.03 mm, the width b of the second sub-part 22 in the direction of the first sub-part 21 approaching the third sub-part 23 is 5 mm, the thickness d of the third sub-part 23 is 0.07 mm, and the angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located is calculated by the formula θ = arctan((d-c) / b); and the angle θ is 0.458°.

[0130] In the embodiment 7, the thickness c of the first sub-part 21 is 0.03 mm, the width b of the second sub-part 22 in the direction of the first sub-part 21 approaching the third sub-part 23 is 8 mm, the thickness d of the third sub-part 23 is 0.07 mm, and the angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located is calculated by the formula θ = arctan((d-c) / b); and the angle θ is 0.286°.

[0131] In Embodiment 8, the thickness c of the first sub-portion 21 is 0.03 mm, the width b of the second sub-portion 22 along the direction of the first sub-portion 21 close to the third sub-portion 23 is 12 mm, the thickness d of the third sub-portion 23 is 0.07 mm, and the included angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located is calculated by the formula θ = arctan((d-c) / b) to be 0.191°.

[0132] In Embodiment 9, the thickness c of the first sub-portion 21 is 0.03 mm, the width b of the second sub-portion 22 along the direction of the first sub-portion 21 close to the third sub-portion 23 is 15 mm, the thickness d of the third sub-portion 23 is 0.07 mm, and the included angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located is calculated by the formula θ = arctan((d-c) / b) to be 0.153°.

[0133] The following Table 1 shows the results obtained through experiments.

[0134] Table 1

[0135] d / mm c / mm b / mm d / mm θ Angle Marking Situation Embodiment 5 0.07 0.03 40 0.573° Serious Embodiment 6 0.07 0.03 50 0.458° Obvious at large viewing angle, invisible at normal viewing angle Embodiment 7 0.07 0.03 80 0.286° Slight at large viewing angle Embodiment 8 0.07 0.03 120 0.191° Slight at large viewing angle Embodiment 9 0.07 0.03 150 0.153° Almost no marking

[0136] As can be seen from Table 1, when the included angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located is greater than 0.458°, serious marking phenomenon will occur; however, as the included angle θ decreases, the width b of the second sub-portion 22 will increase, and too large width b of the second sub-portion 22 will result in reduced support and rigidity of the ultra-thin glass layer 20; in view of the above, the included angle θ between the side wall of the groove 210 and the plane where the support layer 30 is located is greater than or equal to 0.191° and less than or equal to 0.458°.

[0137] In some embodiments, the absolute value of the difference between the thickness of the first sub-portion 21 and the thickness of the third sub-portion 23 has a first value, the width of the second sub-portion 22 in the direction along the first sub-portion 21 towards the third sub-portion 23 has a second value, and the ratio of the first value to the second value is greater than or equal to 1 / 300 and less than or equal to 1 / 125, for example, 1 / 125, 1 / 150, 1 / 175, 1 / 200, 1 / 225, 1 / 250, 1 / 275 or 1 / 300. It should be noted that in the embodiments of the present application, the thickness of the ultra-thin glass layer 20 is set differently to limit the range of the ratio of the first value to the second value, so as to avoid the display module from having a serious indentation phenomenon when the ratio is too large and the second value is too small, and to avoid the ultra-thin glass layer 20 from having insufficient support and rigidity when the ratio is too small and the second value is too large.

[0138] In some embodiments, the width b of the second sub-portion 22 in the direction along the first sub-portion 21 towards the third sub-portion 23 is greater than or equal to 5 mm and less than or equal to 12 mm, for example, the width b of the second sub-portion 22 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm or 12 mm. The embodiments of the present application are verified by experiments, and the width of the second sub-portion 22 is adjusted, so as to improve the indentation phenomenon of the ultra-thin glass layer 20 on the basis of ensuring the support and rigidity of the ultra-thin glass layer 20.

[0139] In some embodiments, the thickness of the first sub-portion 21 can be greater than or equal to 0.03 mm and less than or equal to 0.05 mm, and the thickness of the third sub-portion 23 can be greater than or equal to 0.07 mm and less than or equal to 0.3 mm.

[0140] In some embodiments, the cover layer 41 covers the first side surface 203 and the first surface 201 and / or the second surface 202 of the ultra-thin glass layer 20, the refractive index of the ultra-thin glass layer 20 is greater than or equal to 1.5 and less than or equal to 1.51, and the refractive index of the cover layer 41 is greater than or equal to 1.49 and less than or equal to 1.52. In the embodiments of the present application, the difference in refractive index between the cover layer 41 and the ultra-thin glass layer 20 is further reduced, so as to further improve the indentation phenomenon at the junction between the ultra-thin glass layer 20 and the cover layer 41.

[0141] In some embodiments, the material of the cover layer 41 can include at least one of polyurethane and styrene-poly-methyl-methacrylate copolymer, and the thickness of the cover layer 41 is preferably 20 microns.

[0142] Further, please refer to FIG. 1, FIG. 12 and FIG. 13, in some embodiments, the edge of the ultra-thin glass layer 20 can be wedge-shaped with gradually decreasing thickness, as shown in FIG. 12 and FIG. 13; at this time, the covering layer 41 needs to cover the upper and lower surfaces of the ultra-thin glass layer 20 at the edge position of the ultra-thin glass layer 20, but when the material of the covering layer 41 flows into the area below the ultra-thin glass layer 20 during the coating process, air bubbles 420 are easily generated in this area, affecting the covering effect, protection effect and light transmission uniformity of the covering layer 41 on the ultra-thin glass layer 20.

[0143] In the present embodiment, the ultra-thin glass layer 20 can be subjected to plasma treatment to make the upper and lower surfaces of the ultra-thin glass layer 20 hydrophilic, thereby increasing the wettability between the material of the covering layer 41 and the ultra-thin glass layer 20, so that the ultra-thin glass layer 20 is in complete contact with the covering layer 41, avoiding the generation of air bubbles 420.

[0144] In some embodiments, the surface of the ultra-thin glass layer 20 in contact with the covering layer 41 is hydrophilic.

[0145] Further, please refer to FIG. 1 and FIG. 14, the covering layer 41 covering the first side surface 203 has a second side surface 410 away from the ultra-thin glass layer 20, and the display panel 10 has a third surface 110 close to the ultra-thin glass layer 20 and a third side surface 101 connected to the third surface 110.

[0146] In some embodiments, please refer to FIG. 14, the second side surface 410 on the same side of the display module is inwardly recessed relative to the third side surface 101 towards the direction close to the ultra-thin glass layer 20.

[0147] In the present embodiment, 0 < m < n, and n-m is greater than 0, so that the covering layer 41 does not participate in the beveling process, and the covering layer 41 covering the first side surface 203 of the ultra-thin glass layer 20 can protect the side surface of the ultra-thin glass layer 20.

[0148] In other embodiments, please refer to FIG. 15 and FIG. 16, the second side surface 410 on the same side of the display module is flush with the third side surface 101.

[0149] In the present embodiment, m is greater than n, for example, n < m ≤ 4 mm; then the coating range of the covering layer 41 will exceed the bevel line 50 during the process, so that the covering layer 41 participates in the beveling process, therefore, the second side surface 410 on the same side of the display module is flush with the third side surface 101, which can avoid the collapse of the second adhesive layer and the third adhesive layer on the side away from the display panel 10 of the covering layer 41 and the ultra-thin glass layer 20.

[0150] Further, please refer to FIG. 1 and FIG. 17, since the groove 210 in the ultra-thin glass layer 20 can be arranged in the bending direction, for example, the groove 210 is located on the outer side of the bending of the ultra-thin glass layer 20; therefore, the orientation of the groove 210 in the ultra-thin glass layer 20 can be matched according to the preset direction, but since the ultra-thin glass layer 20 and the cover layer 41 are both transparent, it is not possible to distinguish which side the groove 210 in the ultra-thin glass layer 20 is located on. In order to avoid the groove 210 in the ultra-thin glass layer 20 being arranged incorrectly, the ultra-thin glass layer 20 provided by the embodiment of the present application is provided with a mark groove 60, the mark groove 60 penetrates the ultra-thin glass layer 20 along the thickness direction of the ultra-thin glass layer 20; and the position of the mark groove 60 can be identified in the direction parallel to the ultra-thin glass layer 20.

[0151] In some embodiments, the mark groove 60 is arranged at the side edge of the ultra-thin glass layer 20, and the slot of the mark groove 60 is arranged outwardly; in the top view, when the front surface of the ultra-thin glass layer 20 is upward, the mark groove 60 is located at one side edge of the ultra-thin glass layer 20, and when the front surface of the ultra-thin glass layer 20 is downward, the mark groove 60 is located at the opposite side edge of the ultra-thin glass layer 20; therefore, the front and back surfaces of the ultra-thin glass layer 20 can be distinguished by identifying the position of the mark groove 60 at the side edge of the ultra-thin glass layer 20, that is, which side of the ultra-thin glass layer 20 is provided with the groove 210.

[0152] In some embodiments, the ultra-thin glass layer 20 includes a first side edge 204 and a second side edge 205 which are arranged oppositely without the mark groove 60, wherein the length e of the mark groove 60 along the direction from the first side edge 204 to the second side edge 205 can be 10 mm, the width of the mark groove 60 along the direction parallel to the first side edge 204 can be 0.1 mm, and the distance between the mark groove 60 and the first side edge 204 can be 26 mm.

[0153] In some embodiments, the mark groove 60 is arranged in the non-bending area 303 to avoid interference between the mark groove 60 and the opening in the first bending area 301 and the second bending area 302.

[0154] As described above, in order to improve the support and strength of the display surface of the display module, an ultrathin glass layer 20 is arranged on one side of the display surface of the display module. In order to meet the bending performance of the display module, the first sub-part 21 in the ultrathin glass layer 20 is thinned to improve the bending performance of the ultrathin glass layer 20. After the first sub-part 21 in the ultrathin glass layer 20 is thinned, a groove 210 is formed on the ultrathin glass layer 20. The direction of the groove 210 needs to be determined according to the bending direction of the display module. Since the ultrathin glass layer 20 and the cover layer 41 are both transparent, it is not possible to determine which side of the ultrathin glass layer 20 has the groove 210 in the process. In the embodiment of the present application, a mark groove 60 is formed on the ultrathin glass layer 20 to distinguish the two side surfaces of the ultrathin glass layer 20, and the surface where the groove 210 is located can be determined.

[0155] Further, the display module provided by the embodiment of the present application can be a new form of folding screen with three or more folds.

[0156] Please refer to FIGS. 1, 18 and 19. The display module includes a plurality of first bending areas 301, a plurality of second bending areas 302, and a plurality of non-bending areas 303. The second bending area 302 is connected to the opposite sides of the first bending area 301, and the non-bending area 303 is located on the side of the second bending area 302 away from the first bending area 301. When the display module is configured in a folded state, at least part of the display panel 10, the ultrathin glass layer 20, and the support layer 30 in the first bending area 301 are in a folded state. The ultrathin glass layer 20 includes a plurality of first sub-parts 21, a plurality of second sub-parts 22, and a plurality of third sub-parts 23. The second sub-part 22 is connected to the opposite sides of the first sub-part 21, and the third sub-part 23 is connected to the side of the second sub-part 22 away from the first sub-part 21 and located between the two second sub-parts 22. One first sub-part 21 corresponds to one first bending area 301.

[0157] The ultrathin glass layer 20 includes a plurality of grooves 210. One groove 210 corresponds to one first sub-part 21, and any groove 210 is located on the first surface 201 or the second surface 202. When the tensile performance of the cover layer 41 is good, the groove 210 can be oriented towards the outside of the bend. When the compressive performance of the cover layer 41 is good, the groove 210 can be oriented towards the inside of the bend. When the display module has multiple bends, the grooves 210 can be selectively designed according to the bending direction.

[0158] In some embodiments, when the tensile performance of the cover layer 41 is stronger than the compressive performance, the groove 210 can be oriented towards the outside of the bend. When the compressive performance of the cover layer 41 is stronger than the tensile performance, the groove 210 can be oriented towards the inside of the bend.

[0159] It should be noted that the display module can be folded outwardly or folded inwardly in the first bending area 301, which is not limited herein; when the display module has a plurality of first bending areas 301, the display module can be independently selected to be folded outwardly or folded inwardly in each first bending area 301.

[0160] In some embodiments, please refer to FIG. 1 and FIG. 18, the display module has two bending sections, and the ultrathin glass layer 20 has two grooves 210. Since the two bending sections of the ultrathin glass layer 20 are opposite, one bending section is clockwise and the other bending section is counterclockwise, the two grooves 210 are located on opposite surfaces of the ultrathin glass layer 20.

[0161] In some other embodiments, please refer to FIG. 1 and FIG. 19, the display module has two bending sections, and the ultrathin glass layer 20 has two grooves 210. Since the two bending sections of the ultrathin glass layer 20 are the same, both bending sections are counterclockwise or clockwise, the two grooves 210 are located on the same surface of the ultrathin glass layer 20.

[0162] It should be noted that when the display module has a plurality of bending sections, the ultrathin glass layer 20, the first sub-part 21, the second sub-part 22 and the third sub-part 23 in each bending section can be set according to the foregoing embodiments, such as the embodiments shown in FIG. 1, FIG. 3, FIG. 4, FIG. 5, FIG. 9 or FIG. 10. Similarly, the first bending area 301, the second bending area 302 and the non-bending area 303 of the support layer 30 can be set according to the foregoing embodiments, such as the embodiments shown in FIG. 1, FIG. 3, FIG. 4, FIG. 5, FIG. 9 or FIG. 10.

[0163] In summary, in the embodiments of the present application, the orthographic projection of the first sub-part 21 on the support layer 30 is set to cover at least the first bending area 301, and the orthographic projection of the interface between the first sub-part 21 and the second sub-part 22 on the support layer 30 is located outside the first bending area 301; that is, the position of the ultrathin glass layer 20 with uneven thickness is set outside the first bending area 301, so as to reduce the stress of the display module in the bending process and reduce the probability of peeling of the film layer in the display module; and the width of the second sub-part 22 and the slope angle of the side wall of the groove 210 are adjusted, so as to improve the phenomenon of indentation of the ultrathin glass layer 20 on the basis of ensuring the support and rigidity of the ultrathin glass layer 20; in addition, in the embodiments of the present application, the mark groove 60 is formed on the ultrathin glass layer 20, so as to distinguish the two side surfaces of the ultrathin glass layer 20, and then the surface where the groove 210 is located can be confirmed.

[0164] In addition, the embodiments of the present application also provide a display device, which comprises the display module described in the above embodiments.

[0165] It can be understood that the display device provided by the embodiments of the present application has the same display panel as the above-mentioned embodiments, and therefore has the same beneficial effects as the display panel described in the above-mentioned embodiments, which will not be repeated here.

[0166] In the description of the present application, the terms "first", "second" are only for the purpose of description, 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 features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0167] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0168] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0169] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiment without departing from the technical solution of the present application and in accordance with the technical essence of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A display module, comprising a first bending area, a non-bending area, and a second bending area between the first bending area and the non-bending area, the display module comprising: a display panel; an ultra-thin glass layer disposed on one side of the display panel, the ultra-thin glass layer comprising a first sub-portion, a second sub-portion, and a third sub-portion connected together, the second sub-portion being between the first sub-portion and the third sub-portion, the first sub-portion having a thickness smaller than that of the second sub-portion, and the second sub-portion having a thickness smaller than that of the third sub-portion; and a support layer disposed on a side of the display panel away from the ultra-thin glass layer; wherein, when the display module is configured in a bending state, the display panel, the ultra-thin glass layer, and the support layer in the first bending area are all bent, and when the display module is configured in a flat state, a projection of the first sub-portion on the support layer covers at least the first bending area, and a projection of an interface between the first sub-portion and the second sub-portion on the support layer is located outside the first bending area. The first bending area and the second bending area are arranged apart from each other, the support layer is provided with a first opening in the first bending area and a second opening in the second bending area, the first opening has a depth equal to a thickness of the support layer, and the second opening has a depth smaller than the thickness of the support layer; when the display module is configured in the flat state, the projection of the interface between the first sub-portion and the second sub-portion on the support layer does not overlap with the second opening. When the display module is configured in the flat state, the projection of the interface between the first sub-portion and the second sub-portion on the support layer is located between the first bending area and the second bending area. When the display module is configured in the flat state, the projection of the interface between the first sub-portion and the second sub-portion on the support layer overlaps with a boundary of the second bending area close to the first bending area. When the display module is configured in the flat state, the projection of the interface between the first sub-portion and the second sub-portion on the support layer overlaps with a boundary of the second bending area away from the first bending area. When the display module is configured in the flat state, the projection of the interface between the first sub-portion and the second sub-portion on the support layer is located in the non-bending area. The support layer is provided with a third opening in the first bending area and / or the second bending area, the third opening has a depth equal to the thickness of the support layer, or the support layer is not provided with an opening; wherein, when the display module is configured in the flat state, the projection of the interface between the first sub-portion and the second sub-portion on the support layer overlaps with the boundary of the second bending area away from the first bending area, or the projection of the interface between the first sub-portion and the second sub-portion on the support layer is located in the non-bending area. ​ ​ ​ ​ 2. The display module of claim 1, wherein, ​ ​ 3. The display module of claim 2, wherein, ​ 4. The display module of claim 2, wherein, ​ 5. The display module of claim 2, wherein, ​ 6. The display module of claim 2, wherein, ​ 7. The display module of claim 1, wherein, ​ ​ 8. The display module of claim 1, wherein, The ultra-thin glass layer is provided with a mark groove in the non-bending area, the mark groove penetrates the ultra-thin glass layer along the thickness direction of the ultra-thin glass layer, and the mark groove is arranged at the side of the ultra-thin glass layer.

9. The display module of claim 1, wherein, The ultra-thin glass layer comprises at least one first sub-section, at least two second sub-sections and at least two third sub-sections, the second sub-sections are connected to the opposite sides of the first sub-section, and the third sub-sections are connected to the sides of the second sub-sections away from the first sub-section.

10. The display module of claim 1 or 9, wherein, The side of the ultra-thin glass layer away from the display panel has a first surface, and the side of the support layer close to the display panel has a second surface. At the first surface, the surface of the first sub-section and the surface of the second sub-section are concave relative to the surface of the third sub-section to form a groove, and the first sub-section and the second sub-section connected to the first sub-section are arranged around the groove. At the second surface, the surface of the first sub-section and the surface of the second sub-section are concave relative to the surface of the third sub-section to form the groove, and the first sub-section and the second sub-section connected to the first sub-section are arranged around the groove.

11. The display module of claim 10, wherein, The thickness of the second sub-section gradually increases along the direction of the first sub-section close to the third sub-section, the included angle between the side wall of the groove and the plane where the support layer is located is greater than or equal to 0.191° and less than or equal to 0.458°.

12. The display module of claim 10, wherein, The display module further comprises a cover layer arranged on the side of the display panel provided with the ultra-thin glass layer, the cover layer covers at least the first side surface connected to the first surface, and the cover layer fills the groove at the first surface and / or the second surface.

13. The display module of claim 12, wherein, The cover layer covering the first side surface has a second side surface away from the ultra-thin glass layer, and the display panel has a third surface close to the ultra-thin glass layer and a third side surface connected to the third surface. The second side surface and the third side surface on the same side of the display module are flush. Alternatively, the second side surface on the same side of the display module is inwardly recessed relative to the third side surface towards the direction close to the ultra-thin glass layer.

14. The display module of claim 12, wherein, The surface of the ultra-thin glass layer in contact with the cover layer has hydrophilicity.

15. The display module of claim 10, wherein, The display module comprises a plurality of first bending areas, when the display module is configured in the bending state, the display panel, the ultra-thin glass layer and the support layer in at least part of the first bending areas are in a bent shape. The ultra-thin glass layer comprises a plurality of first sub-sections, and one first sub-section corresponds to one first bending area. The ultra-thin glass layer comprises a plurality of grooves, one groove corresponds to one first sub-section, and any groove is located at the first surface or the second surface.

16. The display module of claim 1, wherein, An absolute value of a difference between a thickness of the first sub-part and a thickness of the third sub-part has a first value, a width of the second sub-part in a direction along the first sub-part and close to the third sub-part has a second value, and a ratio of the first value to the second value is greater than or equal to 1 / 300 and less than or equal to 1 / 125.

17. The display module of claim 1, wherein, The display module further includes a back plate disposed between the display panel and the support layer, a buffer layer disposed between the back plate and the support layer, and a dustproof layer disposed on a side of the support layer away from the buffer layer, a projection of the dustproof layer on the support layer covers at least the first bending area and the second bending area.

18. The display module of claim 17, wherein, The first sub-part is located in a coverage range of a projection of the dustproof layer on the display panel.

19. A display device, comprising a display module, the display module comprising a first bending area, a non-bending area, and a second bending area between the first bending area and the non-bending area, the display module comprising: a display panel; an ultra-thin glass layer disposed on a side of the display panel, the ultra-thin glass layer comprising a first sub-part, a second sub-part, and a third sub-part connected together, the second sub-part being between the first sub-part and the third sub-part, a thickness of the first sub-part being less than a thickness of the second sub-part, and the thickness of the second sub-part being less than a thickness of the third sub-part; a support layer disposed on a side of the display panel away from the ultra-thin glass layer; wherein, when the display module is configured in a bending state, the display panel, the ultra-thin glass layer, and the support layer located in the first bending area are all bent, when the display module is configured in a flat state, a projection of the first sub-part on the support layer covers at least the first bending area, and a projection of an interface between the first sub-part and the second sub-part on the support layer is located outside the first bending area.

20. The display device of claim 19, wherein, The first bending area and the second bending area are arranged apart, the support layer has a first opening located in the first bending area and a second opening located in the second bending area, a depth of the first opening is equal to a thickness of the support layer, and a depth of the second opening is less than the thickness of the support layer; when the display module is configured in the flat state, the projection of the interface between the first sub-part and the second sub-part on the support layer does not overlap the second opening.

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