Display module and display device

Abstract

The application relates to a display module and a display device; the display module comprises a display panel and a cover plate; the cover plate is arranged on one side of the display panel; the cover plate comprises an ultrathin glass layer and a cover layer; the ultrathin glass layer is located on one side of the display panel; the cover layer covers at least one side of the ultrathin glass layer away from the display panel; wherein the cover layer contains a silicon-oxygen coupling agent; part of the silicon-oxygen coupling agent and the ultrathin glass layer form a chemical bond; the application can effectively improve the hardness of the cover plate, improve the touch feeling and the crease phenomenon, improve the adhesion between the ultrathin glass layer and the cover layer, and reduce the probability of peeling between the ultrathin glass layer and the cover layer.

Description

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] The folding display device is the future technology development trend, and the folding brings a new development direction for the display industry. At present, the organic light emitting diode (OLED) display device is more concerned, which has unique bending and folding characteristics, so as to be prepared into various forms of folding display devices, which are convenient to carry out and store, and are widely concerned by the market.

[0003] At present, the outermost cover plate of the folding display module is generally an organic polymer film, which is easy to make the surface of the folding display module soft, strong plastic feeling and serious folding. SUMMARY

[0004] The display module and the display device provided by the embodiments of the present application can improve the hardness of the cover plate surface of the display module, improve the touch feeling and folding phenomenon, and improve the adhesion between the cover layer and the ultra-thin glass layer.

[0005] The display module provided by the embodiments of the present application comprises:

[0006] a display panel;

[0007] a cover plate arranged on one side of the display panel, wherein the cover plate comprises an ultra-thin glass layer and a cover layer, the ultra-thin glass layer is arranged on one side of the display panel, and the cover layer covers at least one side of the ultra-thin glass layer away from the display panel;

[0008] wherein the cover layer contains a silicon-oxygen coupling agent, and part of the silicon-oxygen coupling agent forms a chemical bond with the ultra-thin glass layer.

[0009] In an embodiment of the present application, the silicon-oxygen coupling agent comprises a first type of silicon-oxygen coupling agent, the first type of silicon-oxygen coupling agent is connected to the surface of the ultra-thin glass layer, and a silicon-oxygen bond is formed between the first type of silicon-oxygen coupling agent and the surface of the ultra-thin glass layer.

[0010] In an embodiment of the present application, the cover layer further contains a polymer, and the first type of silicon-oxygen coupling agent is connected between the ultra-thin glass layer and the polymer.

[0011] In an embodiment of the present application, the polymer comprises a polyimide molecular chain, and the first type of silicon-oxygen coupling agent is connected between the ultra-thin glass layer and the polyimide molecular chain.

[0012] In an embodiment of the present application, the siloxane coupling agent further comprises a second type of siloxane coupling agent grafted to the amino group in the polyimide molecular chain.

[0013] In an embodiment of the present application, the siloxane coupling agent further comprises a third type of siloxane coupling agent freely distributed in the cover layer.

[0014] In an embodiment of the present application, the cover layer further comprises fluorine-containing particles.

[0015] In an embodiment of the present application, the display module comprises a bending area and a non-bending area adjacent to the bending area.

[0016] When the thickness of the ultrathin glass layer in the non-bending area is less than 50 microns, the thickness of the ultrathin glass layer in the bending area is equal to the thickness of the ultrathin glass layer in the non-bending area.

[0017] When the thickness of the ultrathin glass layer in the non-bending area is greater than or equal to 50 microns, the thickness of the ultrathin glass layer in the bending area is less than the thickness of the ultrathin glass layer in the non-bending area, and the thickness of the ultrathin glass layer in the bending area is less than 50 microns.

[0018] In an embodiment of the present application, the display module is an outer folding type, a groove is formed on the side of the ultrathin glass layer away from the display panel, the groove is located in the bending area, and the cover layer covers at least the side of the ultrathin glass layer away from the display panel and fills the groove.

[0019] In an embodiment of the present application, the display module is an inner folding type, a groove is formed on the side of the ultrathin glass layer close to the display panel, the groove is located in the bending area, and the cover layer covers the side of the ultrathin glass layer close to the display panel and fills the groove.

[0020] In an embodiment of the present application, the display module further comprises:

[0021] a hardening layer arranged between the cover plate and the display panel, and the surface water drop angle of the hardening layer is greater than or equal to 105°.

[0022] a first adhesive layer arranged between the hardening layer and the cover plate, and the first adhesive layer is attached to the side of the cover plate close to the hardening layer.

[0023] In an embodiment of the present application, the first adhesive layer is attached to the side of the ultra-thin glass layer close to the display panel, and the display module further comprises a bearing layer arranged between the first adhesive layer and the hardened layer, and a second adhesive layer arranged between the bearing layer and the hardened layer, the cover plate is attached to the bearing layer through the first adhesive layer, and the bearing layer is attached to the hardened layer through the second adhesive layer.

[0024] In an embodiment of the present application, the cover layer further covers the side of the ultra-thin glass layer close to the display panel, and the cover layer covering the side of the ultra-thin glass layer close to the display panel is attached to the hardened layer through the first adhesive layer.

[0025] In an embodiment of the present application, the ultra-thin glass layer comprises a first surface away from the display panel, a second surface close to the display panel, and a side surface connected between the first surface and the second surface, and the cover layer further covers the side surface of the ultra-thin glass layer.

[0026] In an embodiment of the present application, the cover plate has a projection boundary on the hardened layer, which coincides with the projection boundary of the first adhesive layer on the hardened layer, the projection of the cover plate on the hardened layer and the projection of the first adhesive layer on the hardened layer are within the coverage range of the hardened layer, and the projection boundary of the cover plate on the hardened layer is spaced apart from the boundary of the hardened layer, and the projection boundary of the first adhesive layer on the hardened layer is spaced apart from the boundary of the hardened layer.

[0027] According to the above purposes of the present application, the embodiments of the present application further provide a display device, which comprises the display module.

[0028] The present application provides a display module and a display device, which effectively improve the hardness of the cover plate, and improve the touch feeling and crease phenomenon by arranging an ultra-thin glass layer in the cover plate. In addition, the cover layer covering the ultra-thin glass layer contains a siloxane coupling agent, and a siloxane bond can be formed between the siloxane coupling agent and the glass, thereby improving the adhesion between the ultra-thin glass layer and the cover layer, reducing the probability of peeling between the ultra-thin glass layer and the cover layer, and improving the stability of the cover plate. The siloxane coupling agent can also be grafted onto the polymer in the cover layer to improve the cross-linking degree of the polymer in the cover layer, thereby further improving the hardness of the surface of the cover plate and improving the touch feeling and crease phenomenon of the display module.

[0029] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments 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 any creative effort on the basis of these drawings.

[0031] 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.

[0032] Figure 1 The structural schematic diagram of the display module provided for an embodiment is shown in the figure.

[0033] Figure 2 The first structural schematic diagram of the display module provided for an embodiment of the present application is shown in the figure.

[0034] Figure 3 The connecting interface structural schematic diagram between the ultrathin glass layer and the cover layer provided for an embodiment of the present application is shown in the figure.

[0035] Figure 4 The first structural schematic diagram of the cover provided for an embodiment of the present application is shown in the figure.

[0036] Figure 5 The second structural schematic diagram of the display module provided for an embodiment of the present application is shown in the figure.

[0037] Figure 6 The second structural schematic diagram of the cover provided for an embodiment of the present application is shown in the figure.

[0038] Figure 7 The third structural schematic diagram of the display module provided for an embodiment of the present application is shown in the figure.

[0039] Figure 8 The third structural schematic diagram of the cover provided for an embodiment of the present application is shown in the figure.

[0040] Figure 9 The fourth structural schematic diagram of the display module provided for an embodiment of the present application is shown in the figure.

[0041] Figure 10 The fourth structural schematic diagram of the cover provided for an embodiment of the present application is shown in the figure.

[0042] Figure 11 The fifth structural schematic diagram of the display module provided for an embodiment of the present application is shown in the figure.

[0043] Figure 12 The fifth structural schematic diagram of the cover provided for an embodiment of the present application is shown in the figure.

[0044] Explanation of reference numerals:

[0045] 1, panel; 2, polarizer (substrate); 3, first OCA adhesive layer; 4, first polymer layer; 5, second OCA adhesive layer; 6, second polymer layer;

[0046] 10, display panel; 101, bending area; 102, non-bending area;

[0047] 20, cover plate; 21, ultra-thin glass layer; 22, cover layer; 210, groove; 211, first surface; 212, second surface; 213, side surface; first type of siloxane coupling agent 221; polyimide molecular chain 222;

[0048] 30, hardening layer;

[0049] 40, bearing layer;

[0050] 51, first adhesive layer; 52, second adhesive layer;

[0051] 60, functional layer. DETAILED DESCRIPTION

[0052] 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 part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0053] Please refer to Figure 1 , the folding display module includes display panel 1, polarizer (substrate) 2, first OCA adhesive layer 3, first polymer layer 4, second OCA adhesive layer 5 and second polymer layer 6 which are sequentially stacked; at present, the outermost side of the display module usually adopts polymer film as cover plate, for example, first polymer layer 4 and second polymer layer 6, but the polymer layer is relatively soft, and has poor supporting property, and then the touch feeling is soft and collapsed, and creases are easily generated, which seriously affects the user experience.

[0054] Please refer to Figure 2 , the present application provides a display module, which comprises a display panel 10 and a cover plate 20; the cover plate 20 is arranged on one side of the display panel 10, and the cover plate 20 comprises an ultra-thin glass layer 21 and a cover layer 22, the ultra-thin glass layer 21 is located on one side of the display panel 10, and the cover layer 22 covers at least one side of the ultra-thin glass layer 21 away from the display panel 10.

[0055] Among them, the cover layer 22 contains siloxane coupling agent, and part of the siloxane coupling agent forms a chemical bond with the ultra-thin glass layer 21.

[0056] In the implementation process, the embodiment of the present application sets the ultra-thin glass layer 21 in the cover plate 20 to effectively improve the hardness of the cover plate 20 and improve the touch feeling and crease phenomenon. In addition, the covering layer 22 covering the ultra-thin glass layer 21 contains a siloxane coupling agent, and a siloxane bond can be formed between the siloxane coupling agent and the glass, thereby improving the adhesion between the ultra-thin glass layer 21 and the covering layer 22, reducing the probability of peeling between the ultra-thin glass layer 21 and the covering layer 22, and improving the stability of the cover plate 20. The siloxane coupling agent can also be grafted onto the polymer in the covering layer 22 to increase the cross-linking degree of the polymer in the covering layer 22, thereby further improving the hardness of the surface of the cover plate 20 and improving the touch feeling and crease phenomenon of the display module.

[0057] It should be noted that the display panel 10 is an OLED display panel, and the display module can be a folding display module.

[0058] In some embodiments, the display panel 10 can include a substrate and a thin film transistor layer disposed on the substrate, the thin film transistor layer being located on a side of the substrate close to the cover plate 20. The substrate can be a hard 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 made of the same material, such as polyimide, and adjacent sub-substrates are bonded by an adhesive sub-layer.

[0059] In some embodiments, the thin film transistor layer includes a thin film transistor including a semiconductor on the substrate, which can be formed of polycrystalline silicon or metal oxide (such as indium gallium zinc oxide). The semiconductor is divided into a channel region and source and drain regions 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 having 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, and 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 having 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 source and drain contact holes, and the source and drain regions are exposed through the source and drain contact holes, respectively.

[0060] 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 with the source region through the source contact hole, and the drain electrode is connected with 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 by a low-resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with 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.

[0061] 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.

[0062] 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 with the pixel units. Each anode is electrically connected with 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.

[0063] 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.

[0064] In some embodiments, the display panel 10 further includes a cathode layer covering the light-emitting layer. In the direction from the anode layer 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 layer, 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.

[0065] 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 a plurality of inorganic film layers and organic film layers stacked alternately, 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.

[0066] 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.

[0067] 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 a first touch electrode, a second touch electrode, and a first bridge line, and the first touch metal layer comprises a second bridge line.

[0068] In some embodiments, the display module further comprises a hardening layer 30 disposed between the display panel 10 and the cover plate 20, a functional layer 60 disposed between the hardening layer 30 and the cover plate 20, and a first adhesive layer 51 disposed between the hardening layer 30 and the cover plate 20.

[0069] In some embodiments, the functional layer 60 can be a polarizer. Alternatively, when the display panel 10 adopts a polarizer-removed architecture, a color film layer is added in the display panel 10 to achieve the functions of reducing reflection and removing the polarizer. In this case, the functional layer 60 can be a substrate layer, and the material can include polyethylene terephthalate.

[0070] In some embodiments, the surface water drop angle of the hardening layer (HC) 30 is greater than or equal to 105°. This is conducive to the separation between the cover plate 20 and the hardening layer 30. During the use of the display module, the cover plate 20 can be replaced, thereby improving the service life and convenience of the display module.

[0071] In some embodiments, the first adhesive layer 51 is attached to one side of the cover plate 20 close to the hardened layer 30, and the cover plate 20 is attached to the hardened layer 30 away from the display panel 10 through the first adhesive layer 51. It can be understood that the cover plate 20 can be directly attached to one side of the hardened layer 30 away from the display panel 10 through the first adhesive layer 51, or there are some functional film layers between the hardened layer 30 and the cover plate 20, and the cover plate 20 is attached to one side of the functional film layer away from the hardened layer 30 through the first adhesive layer 51.

[0072] In the embodiments of the present application, the cover plate 20 includes an ultrathin glass layer 21 and a cover layer 22, and the cover layer 22 covers at least one side of the ultrathin glass layer 21 away from the display panel 10, wherein the ultrathin glass layer 21 has a greater hardness relative to the polymer layer shown in FIG. 1, thereby effectively improving the hardness of the cover plate 20, so that the elastic modulus of the cover plate 20 can reach about 50 Gpa, to improve the touch feeling of the display module and improve the crease phenomenon. Figure 1

[0073] Further, the cover layer 22 contains a siloxane coupling agent, which can form a chemical bond with the ultrathin glass layer 21 on one hand, to improve the adhesion between the cover layer 22 and the ultrathin glass layer 21, and reduce the probability of peeling between the cover layer 22 and the ultrathin glass layer 21; on the other hand, the siloxane coupling agent can also be grafted onto the polymer molecules in the cover layer 22, to improve the crosslinking degree of the polymer in the cover layer 22, thereby further improving the hardness of the cover plate 20, to improve the touch feeling of the display module and improve the crease phenomenon.

[0074] Please refer to Figure 2 and Figure 3 The siloxane coupling agent is distributed in the cover layer 22, and the siloxane coupling agent can include a first type of siloxane coupling agent 221, a second type of siloxane coupling agent, and a third type of siloxane coupling agent according to different distribution positions.

[0075] In some embodiments, the first type of siloxane coupling agent 221 is located at the interface between the cover layer 22 and the ultrathin glass layer 21, and the first type of siloxane coupling agent 221 is connected to the surface of the ultrathin glass layer 21, and a siloxane bond is formed between the first type of siloxane coupling agent 221 and the surface of the ultrathin glass layer 21; for example, Si in the first type of siloxane coupling agent 221 can be connected to O on the surface of the ultrathin glass layer 21 to form a siloxane bond.

[0076] ​In some embodiments, the covering layer 22 further comprises a polymer, and the first siloxane coupling agent 221 can be connected between the polymer and the ultra-thin glass layer 21.

[0077] In some embodiments, the polymer can comprise a polyimide molecular chain 222, i.e., the polymer in the covering layer 22 is polyimide; it can be understood that, if the covering layer 22 does not contain the siloxane coupling agent, the covering layer 22 and the ultra-thin glass layer 21 will be connected by hydrogen bond force, and the hydrogen bond force is smaller than the siloxane bond force, therefore, the embodiments of the present application can effectively improve the adhesion between the covering layer 22 and the ultra-thin glass layer 21 by adding the siloxane coupling agent in the covering layer 22.

[0078] In other embodiments of the present application, the polymer in the covering layer 22 can further comprise polyethylene terephthalate (PET), thermoplastic polyurethane rubber (TPU) or polymethyl methacrylate (PMMA).

[0079] In some embodiments, the first siloxane coupling agent 221 is connected between the ultra-thin glass layer 21 and the polyimide molecular chain 222; further, the first siloxane coupling agent 221 can be connected to the amino group in the polyimide molecular chain 222.

[0080] It can be understood that, Figure 3 The connection structure in the figure is only used to illustrate the connection mode between the first siloxane coupling agent 221 and the ultra-thin glass layer 21 and the polyimide molecular chain 222, i.e., Si in the siloxane coupling agent is connected with O on the surface of the ultra-thin glass layer 21, and the alkyl group in the siloxane coupling agent is connected with the amino group in the polyimide molecular chain 222; but the specific structure is not limited thereto, and changes according to the selection of the siloxane coupling agent and the polyimide.

[0081] It can be understood that, according to the selection of the siloxane coupling agent, Figure 3 The O on the left and right sides of Si in the above formula can also be connected with an alkyl group, i.e., R can be an alkyl group.

[0082] Further, the present application provides a comparative example and example 1 to verify the improved adhesion between the ultra-thin glass layer 21 and the covering layer 22 of the embodiments of the present application, and the results are shown in Table 1 below, wherein the material of the covering layer 22 in the comparative example is polyimide, and the material of the covering layer 22 in example 1 comprises polyimide and the siloxane coupling agent.

[0083] Table 1

[0084] Comparative Example Example 1 Adhesion (N / cm) 0.017 0.45

[0085] As can be seen from Table 1, after the siloxane coupling agent is added in the cover layer 22, the adhesion between the ultra-thin glass layer 21 and the cover layer 22 is more than 26 times of the comparative example, that is, it indicates that the embodiment of the present application can effectively improve the adhesion between the cover layer 22 and the ultra-thin glass layer 21 by adding the siloxane coupling agent in the cover layer 22, and reduce the probability of peeling between the cover layer 22 and the ultra-thin glass layer 21.

[0086] In some embodiments, the siloxane coupling agent further includes a second type of siloxane coupling agent grafted on the amino group in the polyimide molecular chain 222; and the cross-linking density of the cover layer 22 can be further improved, so that the cover plate 20 forms a high-hardness surface, further improves the support of the cover plate 20, and effectively improves the touch and crease phenomenon.

[0087] In some embodiments, the siloxane coupling agent further includes a third type of siloxane coupling agent, which is free distributed in the cover layer 22, that is, the third type of siloxane coupling agent is the siloxane coupling agent which has not reacted.

[0088] As described above, in some embodiments, the chemical structural formula of the first type of siloxane coupling agent can be

[0089]

[0090] In the formula, R1 includes at least one of an alkyl group with 1-15 carbon atoms, a cycloalkyl group with 1-15 carbon atoms, and an alkoxy group with 1-15 carbon atoms, R2 and R3 can each include an alkyl group with 1-10 carbon atoms.

[0091] In some embodiments, the chemical structural formula of the second type of siloxane coupling agent can be

[0092] In the formula, R1 includes at least one of an alkyl group with 1-15 carbon atoms, a cycloalkyl group with 1-15 carbon atoms, and an alkoxy group with 1-15 carbon atoms, R2 and R3 can each include an alkyl group with 1-10 carbon atoms, and R4 includes at least one of an alkyl group with 1-10 carbon atoms and an alkenyl group with 1-10 carbon atoms.

[0093] In some embodiments, the siloxane coupling agent can include propyltrimethoxysilane, A151 (vinyltriethoxysilane), A171 (vinyltrimethoxysilane), A172 (vinyltris(β-methoxyethoxy)silane), 3-glycidyloxypropyltrimethoxysilane, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, trimethoxy[2-(7-oxabicyclo[4.1.0]hept-3-yl)ethyl]silane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, or 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane, etc.

[0094] For example, when the siloxane coupling agent is propyltrimethoxysilane, the first type of siloxane coupling agent is The second type of siloxane coupling agent is The third type of siloxane coupling agent is propyltrimethoxysilane.

[0095] In some embodiments, the cover layer 22 further contains fluorine-containing particles, so that the surface of the cover layer 22 and the cover plate 20 have anti-fingerprint, anti-oil and high water properties.

[0096] In some embodiments, the elastic modulus of the cover layer 22 is greater than or equal to 3 Gpa and less than or equal to 7 Gpa, and the elongation at break of the cover layer 22 is greater than 5%.

[0097] Further, in some embodiments, the display module includes a bending area 101 and a non-bending area 102 adjacent to the bending area 101, and the part of the display module located in the bending area 101 can be bent, so that the display module can be applied to a folding display device.

[0098] In some embodiments, the thickness of the ultrathin glass layer 21 in the bending area 101 is less than or equal to the thickness of the ultrathin glass layer 21 in the non-bending area 102, that is, the bending performance of the cover plate 20 can be improved by reducing the thickness of the ultrathin glass layer 21 in the bending area 101.

[0099] In an embodiment of the present application, please refer to Figure 2 and Figure 4 The ultrathin glass layer 21 includes oppositely arranged first and second surfaces 211 and 212, and a side surface 213 connected between the first and second surfaces 211 and 212, the first surface 211 is located on the side of the ultrathin glass layer 21 away from the display panel 10, and the second surface 212 is located on the side of the ultrathin glass layer 21 close to the display panel 10.

[0100] The cover layer 22 covers the first surface 211 and the side surface 213, and the first adhesive layer 51 is attached to the second surface 212, that is, the first adhesive layer 51 is attached to one side of the ultra-thin glass layer 21 close to the display panel 10.

[0101] In some embodiments, the display module further comprises a bearing layer 40 arranged between the first adhesive layer 51 and the hardened layer 30, and a second adhesive layer 52 arranged between the bearing layer 40 and the hardened layer 30, the cover plate 20 is attached to the bearing layer 40 through the first adhesive layer 51, and the bearing layer 40 is attached to the hardened layer 30 through the second adhesive layer 52.

[0102] It should be noted that, since the cover layer 22 does not cover the second surface 212, in order to avoid the phenomenon of breakage and residue of the ultra-thin glass layer 21 due to stress during replacement of the cover plate 20, the bearing layer 40 is formed on the side of the ultra-thin glass layer 21 close to the display panel 10 in the embodiment of the application to cover the second surface 212, so that the ultra-thin glass layer 21 can be completely removed during replacement, thereby improving the replacement yield and convenience of the cover plate 20.

[0103] In some embodiments, the orthographic projection boundary of the cover plate 20 on the hardened layer 30, the orthographic projection boundary of the first adhesive layer 51 on the hardened layer 30, the orthographic projection boundary of the bearing layer 40 on the hardened layer 30, and the orthographic projection boundary of the second adhesive layer 52 on the hardened layer 30 all coincide, that is, the side surfaces of the cover plate 20, the first adhesive layer 51, the bearing layer 40, and the second adhesive layer 52 are flush.

[0104] In some embodiments, the orthographic projection of the cover plate 20 on the hardened layer 30, the orthographic projection of the first adhesive layer 51 on the hardened layer 30, the orthographic projection of the bearing layer 40 on the hardened layer 30, and the orthographic projection of the second adhesive layer 52 on the hardened layer 30 are all within the coverage range of the hardened layer, and the orthographic projection boundary of the cover plate 20 on the hardened layer 30 is spaced apart from the boundary of the hardened layer 30, the orthographic projection boundary of the first adhesive layer 51 on the hardened layer 30 is spaced apart from the boundary of the hardened layer 30, the orthographic projection boundary of the bearing layer 40 on the hardened layer 30 is spaced apart from the boundary of the hardened layer 30, and the orthographic projection boundary of the second adhesive layer 52 on the hardened layer 30 is spaced apart from the boundary of the hardened layer 30.

[0105] In some embodiments, the material of the bearing layer 40 can include polyethylene terephthalate, and the first adhesive layer 51 and the second adhesive layer 52 can both be OCA optical adhesive.

[0106] In the embodiment, the thickness of the ultra-thin glass layer 21 in the non-bending area 102 is less than 50 microns. When the thickness of the ultra-thin glass layer 21 is small, the bending performance is good. Therefore, the thickness of the ultra-thin glass layer 21 in the bending area 101 is equal to the thickness of the ultra-thin glass layer 21 in the non-bending area 102. Thus, the cover plate 20 has high hardness and supportability while ensuring good bending performance.

[0107] In another embodiment of the present application, in combination with Figure 5 and Figure 6 , the difference between the embodiment and the embodiment shown in Figure 2 is that the thickness of the ultra-thin glass layer 21 in the non-bending area 102 is greater than or equal to 50 microns, so as to further improve the hardness and supportability of the cover plate 20 and improve the touch feeling of the display module.

[0108] In the embodiment, the thickness of the ultra-thin glass layer 21 in the bending area 101 is less than the thickness of the ultra-thin glass layer 21 in the non-bending area 102. That is, the ultra-thin glass layer 21 in the bending area 101 is thinned to improve the bending performance of the ultra-thin glass layer 21 in the bending area 101. Therefore, the embodiment can improve the hardness and supportability of the cover plate 20 and improve the touch feeling of the display module while ensuring the bending performance of the cover plate 20 in the bending area 101.

[0109] In some embodiments, the thickness of the ultra-thin glass layer 21 in the bending area 101 is less than 50 microns.

[0110] Specifically, the ultra-thin glass layer 21 includes a groove 210 formed in the bending area 101, and the groove 210 is located on the side of the ultra-thin glass layer 21 away from the display panel 10, that is, the groove 210 is located at the first surface 211; the cover layer 22 covers the first surface 211 and the side surface 213 and fills the groove 210.

[0111] In some embodiments, the side of the cover layer 22 away from the display panel 10 is a plane, so that the outer surface of the display module is a plane, thereby improving the touch effect of the display module.

[0112] In another embodiment of the present application, in combination with Figure 7 and Figure 8 , the difference between the embodiment and the embodiment shown in Figure 2The difference in the illustrated embodiment is that the cover layer 22 also covers the side of the ultra-thin glass layer 21 near the display panel 10, and the cover layer 22 covering the side of the ultra-thin glass layer 21 near the display panel 10 is bonded to the hardened layer 30 through the first adhesive layer 51.

[0113] In this embodiment, the cover layer 22 covers the ultra-thin glass layer 21, that is, the cover layer 22 covers the first surface 211, the second surface 212 and the side surface 213. Therefore, in this embodiment, when the cover plate 20 is replaced, since the ultra-thin glass layer 21 is covered by the cover layer 22, the phenomenon of the ultra-thin glass layer 21 cracking due to stress can be avoided, so that the ultra-thin glass layer 21 can be completely removed during the replacement process, thereby improving the replacement yield and convenience of the cover plate 20.

[0114] Furthermore, this embodiment is relative to Figure 2 In the embodiment shown, there is no need to set a carrier layer 40. Therefore, the cover plate 20 is directly bonded to the hardened layer 30 through the first adhesive layer 51. This embodiment can save the preparation of the carrier layer 40, save process steps, reduce process costs, and also reduce the thickness of the display module.

[0115] In some embodiments, the orthographic projection boundary of the cover plate 20 on the hardened layer 30 and the orthographic projection boundary of the first adhesive layer 51 on the hardened layer 30 coincide, that is, the side surfaces of the cover plate 20 and the first adhesive layer 51 are flush.

[0116] In some embodiments, the orthographic projection of the cover plate 20 on the hardened layer 30 and the orthographic projection of the first adhesive layer 51 on the hardened layer 30 are both located within the coverage area of ​​the hardened layer, and the boundary of the orthographic projection of the cover plate 20 on the hardened layer 30 is spaced apart from the boundary of the hardened layer 30, and the boundary of the orthographic projection of the first adhesive layer 51 on the hardened layer 30 is spaced apart from the boundary of the hardened layer 30.

[0117] In another embodiment of this application, please refer to... Figure 9 as well as Figure 10 This embodiment and Figure 7 The difference in the illustrated embodiment is that the thickness of the ultra-thin glass layer 21 in the non-bending area 102 is greater than 50 micrometers, so as to further improve the rigidity and support of the cover plate 20 and improve the tactile feel of the display module.

[0118] In the embodiment, the thickness of the ultra-thin glass layer 21 in the bending area 101 is less than the thickness of the ultra-thin glass layer 21 in the non-bending area 102, that is, the ultra-thin glass layer 21 in the bending area 101 is thinned to improve the bending performance of the ultra-thin glass layer 21 in the bending area 101. Therefore, the hardness and support of the cover plate 20 are improved, the touch feeling of the display module is improved, and the bending performance of the cover plate 20 in the bending area 101 is also ensured.

[0119] In some embodiments, the thickness of the ultra-thin glass layer 21 in the bending area 101 is less than 50 microns.

[0120] Specifically, the ultra-thin glass layer 21 includes a groove 210 opened in the bending area 101, and the groove 210 is located on the side of the ultra-thin glass layer 21 away from the display panel 10, that is, the groove 210 is located at the first surface 211; the cover layer 22 covers the first surface 211 and the side surface 213, and fills the groove 210.

[0121] In some embodiments, the side of the cover layer 22 away from the display panel 10 is a plane, so that the outer surface of the display module is a plane, improving the touch effect of the display module.

[0122] In another embodiment of the present application, please combine Figure 11 and Figure 12 , the difference between the embodiment and the embodiment shown in Figure 9 is that the ultra-thin glass layer 21 includes a groove 210 opened in the bending area 101, and the groove 210 is located on the side of the ultra-thin glass layer 21 close to the display panel 10, that is, the groove 210 is located at the second surface 212; the cover layer 22 covers the second surface 212 and the side surface 213, and fills the groove 210.

[0123] In some embodiments, the side of the cover layer 22 close to the display panel 10 and the side of the cover layer 22 away from the display panel 10 are both planes, so that the outer surface of the display module is a plane, improving the touch effect of the display module.

[0124] It should be noted that in the embodiments of the present application, the groove 210 can be arranged on the side of the ultrathin glass layer 21 away from the display panel 10 and / or the side of the ultrathin glass layer 21 close to the display panel 10, the groove 210 is located in the bending area 101, and the cover layer 22 can cover the side of the ultrathin glass layer 21 provided with the groove 210 and fill the groove 210. When the groove 210 is arranged on the side of the ultrathin glass layer 21 away from the display panel 10, the display module can be an outer folding display module; when the groove 210 is arranged on the side of the ultrathin glass layer 21 close to the display panel 10, the display module can be an inner folding display module; the groove 210 is located on the outer side of the bending when the display module is bent.

[0125] As described above, the embodiments of the present application effectively improve the hardness of the cover plate 20 by arranging the ultrathin glass layer 21 in the cover plate 20, and improve the touch feeling and crease phenomenon; in addition, the cover layer 22 covering the ultrathin glass layer 21 contains a siloxane coupling agent, and a siloxane bond can be formed between the siloxane coupling agent and the glass, thereby improving the adhesion between the ultrathin glass layer 21 and the cover layer 22, reducing the probability of peeling between the ultrathin glass layer 21 and the cover layer 22, and improving the stability of the cover plate 20; and the siloxane coupling agent can also be grafted onto the polymer in the cover layer 22 to improve the crosslinking degree of the polymer in the cover layer 22, thereby further improving the hardness of the surface of the cover plate 20 and improving the touch feeling and crease phenomenon of the display module.

[0126] Further, the embodiments 2 to 4 are provided to perform strain tests on the cover plate 20 as shown in Figure 4 and Figure 8 .

[0127] In the embodiment 2, the structure of the cover plate 20 as shown in Figure 4 is adopted, and the thickness of the cover layer 22 is 15 microns.

[0128] In the embodiment 3, the structure of the cover plate 20 as shown in Figure 4 is adopted, and the thickness of the cover layer 22 is 35 microns.

[0129] In the embodiment 4, the structure of the cover plate 20 as shown in Figure 8 is adopted, and the thickness of the cover layer 22 on one side is 15 microns.

[0130] The results obtained by verification are shown in Table 2 as follows.

[0131] Table 2

[0132] Example 2 Example 3 Example 4 Material Safety Value Cover Layer Strain Value 0.1％ 0.2％ 1.3％ 8.0％ Ultra-Thin Glass Layer Strain Value 0.7％ 0.8％ 0.6％ 1.95％

[0133] As can be seen from Table 2, the cover plate 20 provided by the embodiment of the present application can completely meet the safety value of the used material, that is, the cover plate 20 provided by the embodiment of the present application has good stability.

[0134] In addition, the embodiment of the present application further provides a display device, which comprises the display module described in the above embodiment.

[0135] To sum up, the embodiment of the present application effectively improves the hardness of the cover plate 20, improves the touch feeling and the crease phenomenon by arranging the ultrathin glass layer 21 in the cover plate 20. In addition, the covering layer 22 covering the ultrathin glass layer 21 contains a siloxane coupling agent, and a siloxane bond can be formed between the siloxane coupling agent and the glass, thereby improving the adhesion between the ultrathin glass layer 21 and the covering layer 22, reducing the probability of peeling between the ultrathin glass layer 21 and the covering layer 22, and improving the stability of the cover plate 20. The siloxane coupling agent can also be grafted onto the polymer in the covering layer 22 to improve the cross-linking degree of the polymer in the covering layer 22, thereby further improving the hardness of the surface of the cover plate 20 and improving the touch feeling and the crease phenomenon of the display device.

[0136] 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.

[0137] 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 related description of other embodiments.

[0138] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0139] 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 according to the technical essence of the present application, without departing from the technical solution of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A display module, characterized by The display module comprises: a display panel; a cover plate arranged on one side of the display panel, the cover plate comprising an ultra-thin glass layer and a cover layer, the ultra-thin glass layer being arranged on one side of the display panel, and the cover layer covering at least one side of the ultra-thin glass layer away from the display panel; wherein the cover layer contains a silicon-oxygen coupling agent and a polymer, part of the silicon-oxygen coupling agent and the ultra-thin glass layer form a chemical bond, the silicon-oxygen coupling agent comprises a first type of silicon-oxygen coupling agent and a second type of silicon-oxygen coupling agent, and the polymer comprises a polyimide molecular chain; the first type of silicon-oxygen coupling agent is connected between the ultra-thin glass layer and the polyimide molecular chain, and the second type of silicon-oxygen coupling agent is grafted on the amino group in the polyimide molecular chain.

2. The display module of claim 1, wherein, The first type of silicon-oxygen coupling agent is connected to the surface of the ultra-thin glass layer, and a silicon-oxygen bond is formed between the first type of silicon-oxygen coupling agent and the surface of the ultra-thin glass layer.

3. The display module of claim 1, wherein, The first type of silicon-oxygen coupling agent is connected between the ultra-thin glass layer and the polyimide molecular chain.

4. The display module of claim 1, wherein the display module is configured to be mounted on a surface of a device. The silicon-oxygen coupling agent further comprises a third type of silicon-oxygen coupling agent, and the third type of silicon-oxygen coupling agent is distributed freely in the cover layer.

5. The display module of claim 1, wherein, The cover layer further contains fluorine-containing particles.

6. The display module of claim 1, wherein, The display module comprises a bending area and a non-bending area adjacent to the bending area; when the thickness of the ultra-thin glass layer in the non-bending area is less than 50 microns, the thickness of the ultra-thin glass layer in the bending area is equal to the thickness of the ultra-thin glass layer in the non-bending area; when the thickness of the ultra-thin glass layer in the non-bending area is greater than or equal to 50 microns, the thickness of the ultra-thin glass layer in the bending area is less than the thickness of the ultra-thin glass layer in the non-bending area, and the thickness of the ultra-thin glass layer in the bending area is less than 50 microns.

7. The display module of claim 6, wherein, The display module is of an outer folding type, a groove is arranged on the side of the ultra-thin glass layer away from the display panel, the groove is located in the bending area, and the cover layer covers at least the side of the ultra-thin glass layer away from the display panel and fills the groove.

8. The display module of claim 6, wherein, The display module is of an inner folding type, a groove is arranged on the side of the ultra-thin glass layer close to the display panel, the groove is located in the bending area, and the cover layer covers the side of the ultra-thin glass layer close to the display panel and fills the groove.

9. The display module of claim 1, wherein, The display module further comprises: a hardening layer arranged between the cover plate and the display panel, and the surface of the hardening layer has a water drop angle greater than or equal to 105°; a first adhesive layer arranged between the hardening layer and the cover plate, and the first adhesive layer is attached to the side of the cover plate close to the hardening layer.

10. The display module of claim 9, wherein, The first adhesive layer is attached to the side of the ultra-thin glass layer close to the display panel, the display module further comprises a bearing layer arranged between the first adhesive layer and the hardening layer and a second adhesive layer arranged between the bearing layer and the hardening layer, the cover plate is attached to the bearing layer through the first adhesive layer, and the bearing layer is attached to the hardening layer through the second adhesive layer.

11. The display module of claim 9, wherein, The cover layer also covers one side of the ultrathin glass layer close to the display panel, and the cover layer on the one side of the ultrathin glass layer close to the display panel is attached to the hardened layer through the first adhesive layer.

12. The display module of claim 9, wherein, The ultrathin glass layer comprises a first surface away from the display panel, a second surface close to the display panel, and a side surface connected between the first surface and the second surface, and the cover layer also covers the side surface of the ultrathin glass layer.

13. The display module of claim 9, wherein, The projection boundary of the cover plate on the hardened layer coincides with the projection boundary of the first adhesive layer on the hardened layer, the projection of the cover plate on the hardened layer and the projection of the first adhesive layer on the hardened layer are within the coverage range of the hardened layer, and the projection boundary of the cover plate on the hardened layer is spaced from the boundary of the hardened layer, and the projection boundary of the first adhesive layer on the hardened layer is spaced from the boundary of the hardened layer.

14. A display device comprising: The display device comprises the display module according to any one of claims 1 to 13.

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