Cover plate, display module and display device

Abstract

The utility model discloses a cover plate, a display module and a display device. The cover plate comprises a glass main body, an inner side filler and an outer side filler, the glass main body comprises a bending area, and the bending area comprises a bending inner side and a bending outer side opposite to the bending inner side; a plurality of inner side grooves are formed in the inner side of the bent part, and inner side fillers are arranged in the inner side grooves; a plurality of outer side grooves are formed in the outer sides of the bends, and outer side fillers are arranged in the outer side grooves; the modulus of the inner filler and the modulus of the outer filler are both smaller than the modulus of the glass body. According to the cover plate, the high modulus of the glass body can be fully utilized to improve the supporting performance, the protection performance and the impact resistance of the cover plate; meanwhile, the bending stress deformation amount of the bending area can be absorbed through the inner side filler and the outer side filler, so that the bending area can have good bending performance and impact resistance, and then the crease defect of the bending area is overcome.

Description

Technical Field

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

[0002] Because the display module of the foldable display device needs to take folding performance into consideration, the cover plate in the display module is generally made of resin material. For example, a cover plate structure in which a colorless transparent polyimide layer (Colorless Transparent Pi Film, CPI) and a hardening layer (Hard Coating, HC) are stacked can be used, or a cover plate structure in which a polyethylene terephthalate layer (Polyethylene Glycol Terephthalate, PET) and a hardening layer (Hard Coating, HC) are stacked can be used. However, the film material layer in these cover plate structures is often relatively thin, generally with a thickness of only 50μm to 80μm, resulting in poor support for the foldable display module. In actual use scenarios, the foldable display device has a strong plastic feel and poor protection performance, resulting in defects such as easy damage and obvious creases in the display module.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0004] The present application aims to at least to some extent solve the technical problem that the resin cover of a foldable display device is easily damaged and has obvious creases. To this end, the present application provides a cover, a display module and a display device.

[0005] A cover plate is provided in an embodiment of the present application, and the cover plate includes a glass body, an inner filler and an outer filler; the glass body includes a bending zone, and the bending zone includes a bending inner side and a bending outer side opposite to the bending inner side; the bending inner side is provided with a plurality of inner grooves, and the bending outer side is provided with a plurality of outer grooves; the bending zone is bendable along a first direction, and the inner groove and / or the outer groove are strip grooves extending along the first direction, an inner filler is provided in the inner groove, and an outer filler is provided in the outer groove; the modulus of the inner filler and the modulus of the outer filler are both smaller than the modulus of the glass body.

[0006] In some embodiments, the refractive index of the inner filler is 80% to 120% of the refractive index of the glass body; the refractive index of the outer filler is 80% to 120% of the refractive index of the glass body.

[0007] In some embodiments, the intersection corners of the inner grooves are arc-shaped, and the intersection corners of the outer grooves are arc-shaped.

[0008] In some embodiments, an inner filling layer is stacked on the side of the glass body corresponding to the inner side of the bend, the material of the inner filling layer is the same as the material of the inner filler, and the thickness of the inner filling layer is 5.0μm to 20.0μm; an outer filling layer is stacked on the side of the glass body corresponding to the outer side of the bend, the material of the outer filling layer is the same as the material of the outer filler, and the thickness of the outer filling layer is 5.0μm to 20.0μm.

[0009] In some embodiments, the ratio of the width of the inner groove to the width of the outer groove is (1.3-1.7):1.

[0010] In some embodiments, the modulus of the inner filler is greater than or equal to the modulus of the outer material.

[0011] In some embodiments, the width of the inner groove is negatively correlated with the bending radius of the bending zone, and the width of the outer groove is negatively correlated with the bending radius of the bending zone; and / or, the depth of the inner groove is negatively correlated with the bending radius of the bending zone, and the depth of the outer groove is negatively correlated with the bending radius of the bending zone.

[0012] In some embodiments, a plurality of inner oblique ribs are disposed in the inner groove; a plurality of outer oblique ribs are disposed in the outer groove; and the material of the inner oblique ribs and / or the outer oblique ribs is the same as that of the glass body.

[0013] In some embodiments, each of the inner oblique ribs has the same angle with the first direction, and each of the outer oblique ribs has the same angle with the first direction; and / or each of the inner oblique ribs has a different angle with the first direction, and each of the outer oblique ribs has a different angle with the first direction.

[0014] The disclosed embodiment further provides a display module, which includes a flexible display panel and the above-mentioned cover plate, wherein the cover plate is stacked on the light emitting side of the flexible display panel.

[0015] The embodiment of the present disclosure further provides a display device, which includes the above-mentioned display module.

[0016] The embodiments of the present application have at least the following beneficial effects:

[0017] The above-mentioned cover plate adopts a glass body as the basic structure of the cover plate, and can make full use of the higher modulus of the glass body itself to improve the supporting performance, protective performance and impact resistance of the cover plate; at the same time, the bending zone of the glass body is provided with an inner groove and an outer groove, the inner groove is provided with an inner filler, and the outer groove is filled with an outer filler, and the moduli of the inner filler and the outer filler are both smaller than the modulus of the glass body, then a composite structure of the glass body, the inner filler and the outer filler is formed in the bending zone, that is, the glass body can be used to provide better supporting performance, protective performance and appearance texture for the bending zone, and the inner filler in the inner groove and the outer filler in the outer groove can be used to reduce the modulus of the bending zone, so that the inner filler and the outer filler can be used to absorb the bending stress deformation of the bending zone, so that the bending zone can have better bending performance and impact resistance, thereby improving the crease defects in the bending zone. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 shows a cross-sectional view of a cover plate in an embodiment of the present disclosure;

[0020] Figure 2 Shows Figure 1 A schematic diagram of the structure of the inner side of the bend of the middle cover plate;

[0021] Figure 3 Shows Figure 1 A schematic diagram of the structure of the bent outer side of the middle cover plate;

[0022] Figure 4 Shows Figure 1 A cross-sectional view of the bending area of ​​the middle cover plate;

[0023] Figure 5 Shows Figure 4 A cross-sectional view of a bending area of ​​a glass body in a middle cover plate;

[0024] Figure 6 Shows Figure 5 Schematic diagram of etching the inner groove of the middle bending area;

[0025] Figure 7 Shows Figure 1 Dimensional drawing of the middle cover in the bending area;

[0026] Figure 8A cross-sectional view of a bending area of ​​a cover plate in another embodiment of the present disclosure is shown;

[0027] Fig. 9 Shows Figure 1 A diagram showing the bending state of the bending zone of the middle cover plate;

[0028] Fig.10 Shows Figure 1 A diagram showing the flattened state of the bending area of ​​the middle cover plate;

[0029] Fig.11 Shows Fig. 9 A schematic diagram of the structure of the bending area of ​​the glass body in the middle cover plate;

[0030] Fig.12 A schematic structural diagram of the inner side of the bend of the cover plate in another embodiment of the present disclosure is shown;

[0031] Fig.13 Shows Fig.12 Magnified view at A in the middle;

[0032] Fig.14 A schematic structural diagram of the inner side of the bend of the cover plate in another embodiment of the present disclosure is shown;

[0033] Fig.15 Shows Fig.14 Magnified view at B.

[0034] Reference numerals:

[0035] 1000, glass body; 1100, bending area; 1110, inner side of the bending; 1111, inner groove; 1112, inner ribs; 1113, inner oblique ribs; 1120, outer side of the bending; 1121, outer groove; 1122, outer ribs; 1123, outer oblique ribs; 1200, plane area; 2000, inner filler; 3000, outer filler; 4000, inner filling layer; 5000, outer filling layer; 6000, hardening layer; 7000, anti-fingerprint layer; Q1, arc area; Q2, arc starting area; Q3, inclined plate area; W1, width of inner groove; L1, width of inner rib; W2, width of outer groove; L2, width of outer rib; D1, initial thickness of glass body; D2, minimum thickness of glass body; D3, depth of inner groove; D4, depth of outer groove; F1, first direction; F2, second direction; F3, third direction. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0038] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0039] The present disclosure provides a cover plate, such as Figures 1 to 15 As shown, the cover plate includes a glass body 1000, an inner filler 2000 and an outer filler 3000; the glass body 1000 includes a bending zone 1100, and the bending zone 1100 includes a bending inner side 1110 and a bending outer side 1120 opposite to the bending inner side 1110; the bending inner side 1110 is provided with a plurality of inner grooves 1111, and the bending outer side 1120 is provided with a plurality of outer grooves 1121, the bending zone 1100 can be bent along a first direction F1, the inner grooves 1111 and / or the outer grooves 1121 are strip grooves extending along the first direction F1, the inner groove 1111 is provided with an inner filler 2000; the outer groove 1121 is provided with an outer filler 3000; the modulus of the inner filler 2000 and the modulus of the outer filler 3000 are both smaller than the modulus of the glass body 1000.

[0040] The cover plate provided in the embodiment of the present disclosure is as follows: Figures 1 to 15As shown, the glass body 1000 is used as the basic structure of the cover plate, and the high modulus of the glass body 1000 itself can be fully utilized to improve the support performance, protection performance and impact resistance of the cover plate; at the same time, the bending area 1100 of the glass body 1000 is provided with an inner groove 1111 and an outer groove 1121, the inner groove 1111 is provided with an inner filler 2000, and the outer groove 1121 is filled with an outer filler 3000, and the modulus of the inner filler 2000 and the outer filler 3000 are both smaller than the modulus of the glass body 1000, so the glass body 1000, 1111 and 1121 are formed in the bending area 1100. The composite structure of the inner filler 2000 and the outer filler 3000 can utilize the glass body 1000 to provide better support performance, protection performance and appearance texture for the bending zone 1100, and can utilize the inner filler 2000 in the inner groove 1111 and the outer filler 3000 in the outer groove 1121 to reduce the modulus of the bending zone 1100, and utilize the inner filler 2000 and the outer filler 3000 to absorb the bending stress and deformation of the bending zone 1100, so that the bending zone 1100 can have better bending performance and impact resistance, thereby improving the crease defects of the bending zone 1100.

[0041] In some embodiments of the present disclosure, Figure 2 and Figure 3 As shown, by making the inner groove 1111 and / or the outer groove 1121 a strip groove extending along the first direction F1, the inner filler 2000 filled in the inner groove 1111 extends along the first direction F1, and the outer filler 3000 filled in the outer groove 1121 extends along the first direction F1. When the bending area 1100 is bent, the extension direction of the inner filler 2000 and the extension direction of the outer filler 3000 are perpendicular to the stress direction during bending, and the inner filler 2000 can better absorb the compressive stress of the inner side 1110 of the bending, and the outer filler 3000 can better absorb the compressive stress of the outer side 1120 of the bending.

[0042] In some embodiments of the present disclosure, Figures 1 to 15 As shown, the cover plate is used to cover the light-emitting side of the flexible display panel, and the side of the flexible display panel that the cover plate is used to cover can be determined according to the folding form of the flexible display module. If the flexible display module is in an inner folding form, that is, after the flexible display module is folded, the display panel is folded to the inside of the flexible display module, then the side of the cover plate corresponding to the outer side 1120 of the bend is covered on the light-emitting side of the flexible display panel; if the flexible display module is in an outer folding form, that is, after the flexible display module is folded, the display panel is folded to the outside of the flexible display module, then the side of the cover plate corresponding to the inner side 1110 of the bend is covered on the light-emitting side of the flexible display panel.

[0043] In some embodiments of the present disclosure, Figure 1 As shown, the glass body 1000 in the cover plate includes a bending area 1100 and a plane area 1200 connected to the bending area 1100. Since the plane area 1200 remains straight and unbent when the display module is bent, the two sides of the plane area 1200 will not be subjected to bending stress. Therefore, the plane area 1200 does not need to be provided with structures such as grooves.

[0044] In some embodiments of the present disclosure, Figures 1 to 15 As shown, optionally, the inner filler 2000 may be the same as or different from the outer filler 3000. Optionally, the inner filler 2000 and the outer filler 3000 may be independently selected from flexible resin materials. The flexible resin material may include, but is not limited to, thermoplastic elastomer (TPE), alkylsiloxane resin (PDMS), flexible epoxy resin, flexible vinyl ester resin, and silicone.

[0045] In some embodiments of the present disclosure, Figures 1 to 15 As shown, optionally, an inner groove 1111 can be formed on the inner side 1110 of the bending zone 1100 through an etching process, and at the same time, the inner rib 1112 is retained between adjacent inner grooves 1111, and the inner groove 1111 is filled with an inner filler 2000 so that the inner groove 1111 area is flush with the inner rib 1112 area; an outer groove 1121 can be formed on the outer side 1120 of the bending zone 1100 through an etching process, and at the same time, the outer rib 1122 is retained between adjacent outer grooves 1121, and the outer groove 1121 is filled with an outer filler 3000 so that the outer groove 1121 area is flush with the outer rib 1122 area. When the cover plate is bent in the bending zone 1100, the inner ribs 1112 and the outer ribs 1122 can provide support, and due to the low creep of the glass material, the creases can be reduced to a certain extent; in addition, the inner filler 2000 and the outer filler 3000 can also provide a certain support. Since the modulus of the inner filler 2000 and the outer filler 3000 is smaller than that of the glass body 1000, it is easier to deform when subjected to a force. Therefore, when the bending zone 1100 is bent, the inner filler 2000 can absorb the compressive stress through deformation, and the outer filler 3000 can absorb the tensile stress through deformation, which can not only reduce the impact of the bending of the bending zone 1100 on the glass body 1000, but also reduce the creases generated by the cover plate in the bending zone 1100 to a certain extent, so that the cover plate can pass various reliability tests when folded more than 200,000 times.

[0046] As an optional implementation, the refractive index of the inner filler 2000 is 80% to 120% of the refractive index of the glass body 1000 ; the refractive index of the outer filler 3000 is 80% to 120% of the refractive index of the glass body 1000 .

[0047] In some embodiments of the present disclosure, the refractive index of the inner filler 2000 is 90% to 110% of the refractive index of the glass body 1000, and the refractive index of the outer filler 3000 is 90% to 110% of the refractive index of the glass body 1000, so as to ensure that the overall refractive index of the composite cover plate structure formed after the inner groove 1111 is filled with the inner filler 2000 and the outer groove 1121 is filled with the outer filler 3000 remains basically unchanged. On the one hand, the influence of the inner groove 1111 and the outer groove 1121 and the inner filler 2000 and the outer filler 3000 on the refractive index of the cover plate is reduced, and the adverse influence of the different refractive indices of various parts of the cover plate on the outgoing light of the flexible display panel is avoided; on the other hand, the visibility of the inner groove 1111 and the outer groove 1121 can be reduced.

[0048] In some embodiments of the present disclosure, optionally, the refractive index of the inner filler 2000 is 90% to 110% of the refractive index of the glass body 1000; the refractive index of the outer filler 3000 is 90% to 110% of the refractive index of the glass body 1000. Optionally, the refractive index of the inner filler 2000 is 95% to 105% of the refractive index of the glass body 1000, and the refractive index of the outer filler 3000 is 95% to 105% of the refractive index of the glass body 1000.

[0049] In some embodiments of the present disclosure, optionally, the refractive index of the inner filler 2000 is 80%, 83%, 85%, 87%, 90%, 93%, 95%, 97%, 100%, 103%, 105%, 107%, 110%, 113%, 115%, 117% and 120% of the refractive index of the glass body 1000; the refractive index of the outer filler 3000 is 80%, 83%, 85%, 87%, 90%, 93%, 95%, 97%, 100%, 103%, 105%, 107%, 110%, 110%, 113%, 115%, 117% and 120% of the refractive index of the glass body 1000.

[0050] As an optional implementation, Figures 1 to 11 As shown, the intersection corners of the inner grooves 1111 are arc-shaped, and the intersection corners of the outer grooves 1121 are arc-shaped.

[0051] In some embodiments of the present disclosure, Figures 1 to 11As shown, while the refractive index of the inner filler 2000 and the outer filler 3000 is close to the refractive index of the glass body 1000, by making the intersection corners of the inner groove 1111 and the intersection corners of the outer groove 1121 arc-shaped, the abruptness of the intersection corners can be eliminated to a certain extent, the visibility of the intersection corners can be eliminated, and the visibility of the inner groove 1111 and the outer groove 1121 can be reduced.

[0052] In some embodiments of the present disclosure, Figure 6 As shown, the inner groove 1111 and the outer groove 1121 can be etched on the glass body by a special etching process to form an arc-shaped groove on the glass body, so that the intersection corners of the inner groove 1111 and the outer groove 1121 form a rounded transition. For example, a gradient etching process can be used to gradually increase the etching depth by etching and grooving multiple times, and the etching width is reduced while the etching depth is increased, and then a chemical polishing process can be used to form an arc-shaped groove structure with a rounded transition.

[0053] As an optional implementation, Figures 1 to 8 As shown, an inner filling layer 4000 is stacked on a side of the glass body 1000 corresponding to the inner side 1110 of the bend, and an outer filling layer 5000 is stacked on a side of the glass body 1000 corresponding to the outer side 1120 of the bend.

[0054] In some embodiments of the present disclosure, Figures 1 to 8 As shown, the inner filling layer 4000 is stacked on the side of the glass body 1000 corresponding to the inner side 1110 of the bend, so that the inner filling layer 4000 covers the bending area 1100 and the plane area 1200 of the glass body 1000 as a whole. On the one hand, on the side corresponding to the inner side 1110 of the bend, the surface of the cover plate can be made smoother and more complete; on the other hand, the inner filler 2000 in the inner groove 1111 can be connected as a whole through the inner filling layer 4000, which can prevent the inner filler 2000 from falling off from the inner groove 1111 to a certain extent, and ensure the structural strength of the bending area 1100; in addition, on the side corresponding to the inner side 1110 of the bend, the intersection edges and corners in the glass body 1000 are covered by the inner filling layer 4000, which can reduce the visibility of the inner groove 1111 and make the refractive index of each area of ​​the glass body 1000 closer. Similarly, the configuration and function of the outer filling layer 5000 are the same as those of the inner filling layer 4000 and will not be described in detail herein.

[0055] As an optional implementation, Figure 8 As shown, the cover plate is used to be stacked on the display side of the display panel, and the anti-fingerprint layer 7000 and / or the hardening layer 6000 are stacked on the side of the cover plate opposite to the display panel.

[0056] In some embodiments of the present disclosure, Figure 8 As shown, the cover plate is used to be stacked on the display side of the display panel. By stacking an anti-fingerprint layer 7000 (Anti Finger, AF) on the side of the cover plate opposite to the display panel, it can be used to prevent fingerprints, oil stains, sweat and other dirt from adhering to the cover plate, thereby avoiding the display effect of the display panel being affected by the adhesion of dirt.

[0057] In some embodiments of the present disclosure, Figure 8 As shown, the cover plate is used to be stacked on the display side of the display panel. A hardening layer 6000 (Hard Coating, HC) is stacked on the side of the cover plate opposite to the display panel. The hardening layer 6000 can increase the hardness and scratch resistance of the cover plate, thereby improving the protective effect of the cover plate on the display panel.

[0058] In some embodiments of the present disclosure, Figure 8 As shown, on the side of the cover plate opposite to the display panel, an anti-fingerprint layer 7000 and a hardening layer 6000 can be provided at the same time, thereby forming a composite cover plate structure with more functions, making the cover plate have greater structural strength, better texture, and better user experience. Optionally, the anti-fingerprint layer 7000 is stacked on the side of the hardening layer 6000 away from the glass body 1000, that is, the anti-fingerprint layer 7000 is located at the outermost side of the cover plate, so as to prevent fingerprints, oil stains, sweat and other dirt from adhering to the cover plate through the anti-fingerprint layer 7000.

[0059] As an optional implementation, Figures 1 to 11 As shown, the width W1 of the inner groove is greater than the width W2 of the outer groove.

[0060] In some embodiments of the present disclosure, Figures 1 to 11 As shown, when the bending zone 1100 is bent along the first direction F1, the inner side 1110 of the bend is subjected to compressive stress and has a large deformation, while the outer side 1120 of the bend is subjected to tensile stress and has a small deformation. By making the width W1 of the inner groove of the inner side 1110 of the bend greater than the width W2 of the outer groove of the outer side 1120 of the bend, the inner filler 2000 in the inner groove 1111 can be made relatively wider and have a relatively large deformation, thereby absorbing a relatively large compressive stress; the outer filler 3000 in the outer groove 1121 can be made relatively narrow and have a relatively small deformation, thereby absorbing a relatively small tensile stress; thereby making the forces on the inner and outer sides of the bend more balanced, thereby avoiding the formation of creases to a certain extent.

[0061] In some embodiments of the present disclosure, the compressive stress and deformation of the inner side 1110 of the bend and the tensile stress and deformation of the outer side 1120 of the bend can be obtained through simulation experiments, and the width W1 of the inner groove and the width W2 of the outer groove can be set according to the results of the simulation experiments.

[0062] As an optional implementation, Figures 1 to 11 As shown, the ratio of the width W1 of the inner groove to the width W2 of the outer groove is (1.3-1.7):1.

[0063] In some embodiments of the present disclosure, Figures 1 to 11 As shown, when the bending zone 1100 is bent along the first direction F1, the inner side 1110 of the bend is subjected to compressive stress and has a large deformation, while the outer side 1120 of the bend is subjected to tensile stress and has a small deformation. The deformation of the inner side 1110 of the bend is 1.3 to 1.7 of the deformation of the outer side 1120 of the bend. Therefore, the ratio of the width W1 of the inner groove to the width W2 of the outer groove can be (1.3 to 1.7): 1, so that the inner filler 2000 in the inner groove 1111 is relatively wide to adapt to the relatively large deformation of the inner side 1110 of the bend and absorb the relatively large compressive stress; the outer filler 3000 in the outer groove 1121 is relatively narrow to adapt to the relatively small deformation of the outer side 1120 of the bend and absorb the relatively small tensile stress; thereby making the forces on the inner and outer sides of the bend more balanced and avoiding the formation of creases to a certain extent.

[0064] It should be noted that the width W1 of the inner groove refers to the width of the inner groove 1111 in the second direction F2, and the width W2 of the outer groove refers to the width of the outer groove 1121 in the second direction F2. The second direction F2 is a direction perpendicular to the first direction F1 and parallel to the cover plate.

[0065] As an optional implementation, the modulus of the inner filler 2000 is greater than or equal to the modulus of the outer material.

[0066] In some embodiments of the present disclosure, under the premise that the width W1 of the inner groove is greater than the width W2 of the outer groove, the modulus of the inner filler 2000 can be greater than or equal to the modulus of the outer material, so that the overall modulus of the inner side 1110 of the bend is close to the overall modulus of the outer side 1120 of the bend, so that the inner side 1110 of the bend and the outer side 1120 of the bend can remain horizontal when no force is applied, thereby preventing the cover from automatically bending due to the difference in modulus between the inner side 1110 of the bend and the outer side 1120 of the bend.

[0067] In some embodiments of the present disclosure, the inner filler 2000 can be made of a flexible resin material with a modulus of 20MPa~100Mpa, the outer filler 3000 can be made of a flexible resin material with a modulus of 20MPa~100Mpa, and the outer filler 3000 can also be made of a flexible resin material with a modulus of 50Kpa~50Mpa.

[0068] As an optional implementation, Figures 1 to 11 As shown, the width W1 of the inner groove is negatively correlated with the bending radius of the bending zone 1100, and the width W2 of the outer groove is negatively correlated with the bending radius of the bending zone 1100; and / or, the depth D3 of the inner groove is negatively correlated with the bending radius of the bending zone, and the depth D4 of the outer groove is negatively correlated with the bending radius of the bending zone.

[0069] In some embodiments of the present disclosure, Figures 1 to 11 As shown, due to the different folding forms of the display module, the bending radius in the folding area of ​​the display module is variable, and accordingly the bending radius of the cover plate at different locations in the folding area is different. In areas with relatively large bending radius, the stress on the cover plate is relatively small; in areas with relatively small bending radius, the stress on the cover plate is relatively large.

[0070] In some embodiments of the present disclosure, Figures 1 to 11 As shown, the width W1 of the inner groove and the width W2 of the outer groove can be set according to the stress conditions of the cover plate, so as to adjust the modulus of various locations in the bending zone 1100 by the inner filler 2000 set in the inner groove 1111 and the outer filler 3000 set in the outer groove 1121. By making the width W1 of the inner groove negatively correlated with the bending radius of the bending zone 1100, and the width W2 of the outer groove negatively correlated with the bending radius of the bending zone 1100, that is, in an area with a relatively small bending radius, the stress applied to the cover plate is relatively large, the width W1 of the inner groove and the width W2 of the outer groove can be made relatively large, so as to absorb relatively large stress and deformation through the inner filler 2000 and the outer filler 3000; in an area with a relatively large bending radius, the stress applied to the cover plate is relatively small, the width W1 of the inner groove and the width W2 of the outer groove can be made relatively small, so as to absorb relatively small stress and deformation through the inner filler 2000 and the outer filler 3000, and at the same time, the etching amount of the glass body 1000 in this area is reduced as much as possible, thereby enhancing the strength of the glass body 1000 in the bending zone 1100.

[0071] In some embodiments of the present disclosure, Figures 1 to 11As shown, the depth D3 of the inner groove and the depth D4 of the outer groove can be set according to the stress conditions of the cover plate, so as to adjust the modulus of various locations in the bending zone 1100 by the inner filler 2000 set in the inner groove 1111 and the outer filler 3000 set in the outer groove 1121. By making the depth D3 of the inner groove negatively correlated with the bending radius of the bending zone 1100, and the depth D4 of the outer groove negatively correlated with the bending radius of the bending zone 1100, that is, in an area with a relatively small bending radius, the stress applied to the cover plate is relatively large, the depth D3 of the inner groove and the depth D4 of the outer groove can be made relatively large, so as to absorb relatively large stress and deformation through the inner filler 2000 and the outer filler 3000; in an area with a relatively large bending radius, the stress applied to the cover plate is relatively small, the depth D3 of the inner groove and the depth D4 of the outer groove can be made relatively small, so as to absorb relatively small stress and deformation through the inner filler 2000 and the outer filler 3000, and at the same time, the etching amount of the glass body 1000 in this area is reduced as much as possible, thereby enhancing the strength of the glass body 1000 in the bending zone 1100.

[0072] In some embodiments of the present disclosure, Figures 1 to 11 As shown, the width W1 of the inner groove, the width W2 of the outer groove, the depth D3 of the inner groove and the depth D4 of the outer groove can be set according to the stress of the cover plate, so as to adjust the modulus of each part of the bending zone 1100 by the inner filler 2000 set in the inner groove 1111 and the outer filler 3000 set in the outer groove 1121. By making the width W1 of the inner groove negatively correlated with the bending radius of the bending zone 1100, the width W2 of the outer groove negatively correlated with the bending radius of the bending zone 1100, the depth D3 of the inner groove negatively correlated with the bending radius of the bending zone 1100, and the depth D4 of the outer groove negatively correlated with the bending radius of the bending zone 1100,

[0073] That is to say, in an area where the bending radius is relatively small, the stress applied to the cover plate is relatively large, and the width W1 of the inner groove and the width W2 of the outer groove can be made relatively large, and the depth D3 of the inner groove and the depth D4 of the outer groove can be made relatively large, so as to absorb relatively large stress and deformation through the inner filler 2000 and the outer filler 3000; in an area where the bending radius is relatively large, the stress applied to the cover plate is relatively small, and the width W1 of the inner groove and the width W2 of the outer groove can be made relatively small, and the depth D3 of the inner groove and the depth D4 of the outer groove can be made relatively small, so as to absorb relatively small stress and deformation through the inner filler 2000 and the outer filler 3000, and at the same time, the etching amount of the glass body 1000 in this area can be reduced as much as possible, thereby enhancing the strength of the glass body 1000 in the bending zone 1100.

[0074] It should be noted that the depth D3 of the inner groove refers to the depth of the inner groove 1111 in the third direction F3, the depth D4 of the outer groove refers to the depth of the outer groove 1121 in the third direction F3, and the second direction F2 is a direction perpendicular to both the first direction F1 and the second direction F2.

[0075] In some embodiments of the present disclosure, Figures 9 to 11 As shown, optionally, the inner folding form adopted by the display module can be in the form of a water drop. Accordingly, the bending area 1100 of the cover plate arranged in the display module is in the form of a water drop after being bent. The bending area 1100 may include three areas with different bending radii after being bent, such as Fig. 9 As shown, the three regions with different bending radii can be respectively recorded as the arc region Q1, the arc starting region Q2 and the inclined plate region Q3.

[0076] like Figures 9 to 11 As shown, the bending radius of the arc zone Q1 is relatively small, for example, the bending radius of the arc zone Q1 can be 1.5mm~3.0mm. The compressive stress on the inner side 1110 of the bending in this area is relatively large, and the tensile stress on the outer side 1120 of the bending is relatively large. In order to reduce the stress on the arc zone Q1, the width W1 of the inner groove and the width W2 of the outer groove can be made relatively large, and the density of the inner groove 1111 of the inner side 1110 of the bending and the density of the outer groove 1121 of the outer side 1120 of the bending can also be made relatively large. In other words, the width L1 of the inner rib and the width L2 of the outer rib can be made relatively small.

[0077] like Figures 9 to 11 As shown, the bending radius of the arc-starting zone Q2 is larger than that of the circular arc zone Q1. For example, the bending radius of the arc-starting zone Q2 can be 20mm~30mm, then the pressure on the inner side 1110 of the arc-starting zone Q2 should be smaller than that of the circular arc zone Q1, and the tensile stress on the outer side 1120 of the arc-starting zone Q2 is smaller than that of the circular arc zone Q1. In order to reduce the stress on the arc-starting zone Q2 and at the same time reduce the amount of etching on the glass body 1000 as much as possible so that the glass body 1000 maintains a relatively large strength, the width W1 of the inner groove and the width W2 of the outer groove of the arc-starting zone Q2 can be made smaller than that of the circular arc zone Q1, and the density of the inner groove 1111 of the inner side 1110 of the arc-starting zone Q2 and the density of the outer groove 1121 of the outer side 1120 of the arc-starting zone Q2 can also be made smaller than that of the circular arc zone Q1. In other words, the width L1 of the inner rib and the width L2 of the outer rib of the arc-starting zone Q2 can be made relatively larger.

[0078] like Figures 9 to 11As shown, the inclined plate area Q3 remains straight without any bends, that is, the inclined plate area Q3 has no bending arc and bending radius, so the two sides of the inclined plate area Q3 are not subjected to stress. Therefore, there is no need to set the inner groove 1111 and the outer groove 1121 in the inclined plate area Q3, so that the inclined plate area Q3 retains the initial thickness D1 of the glass body, thereby ensuring the strength of the glass body 1000 of the inclined plate area Q3.

[0079] In some embodiments of the present disclosure, optionally, the depth D3 of the inner groove can be 25% to 55% of the initial thickness D1 of the glass body, the depth D4 of the outer groove can be 25% to 55% of the initial thickness D1 of the glass body, and the minimum thickness D2 of the glass body is 10% to 20% of the initial thickness D1 of the glass body.

[0080] In some embodiments of the present disclosure, glass of a certain initial thickness may be selected as the glass body 1000, so that the plane area 1200 of the glass body 1000 maintains the initial thickness D1 of the glass body to ensure the strength of the glass body 1000 in the plane area 1200; an inner groove 1111 and an outer groove 1121 are formed in the bending area 1100 of the glass body 1000 by etching and other processes, the depth D3 of the inner groove may be 25% to 55% of the initial thickness D1 of the glass body, the depth D4 of the outer groove may be 25% to 55% of the initial thickness D1 of the glass body, the depth D3 of the inner groove and the depth D4 of the outer groove may be the same or different, The depth D3 of the inner groove and the depth D4 of the outer groove can determine their value ranges based on the results of simulation experiments; an inner filler 2000 can be set in the inner groove 1111 and an outer filler 3000 can be set in the outer groove 1121, so that the inner filler 2000 and the outer filler 3000 can absorb the bending stress and deformation. At the same time, after the inner groove 1111 and the outer groove 1121 are etched in the bending zone 1100, the minimum thickness D2 of the glass body in the bending zone 1100 is 10% to 20% of the initial thickness D1 of the glass body, so that the glass body 1000 in the bending zone 1100 retains a certain thickness, thereby ensuring the strength of the bending zone 1100.

[0081] In some embodiments of the present disclosure, Figure 7As shown, the initial thickness D1 of the glass body can be 150μm to 200μm. After the inner groove 1111 and the outer groove 1121 are formed in the bending zone 1100, the inner ribs 1112 are retained between the inner grooves 1111, and the outer ribs 1122 are retained between the outer grooves 1121. Then, the distance between the inner ribs 1112 and the outer grooves 1121 is equal to the initial thickness D1 of the glass body. The depth D3 of the inner groove and the depth D4 of the outer groove can be 50μm to 80μm, respectively. The depth D3 of the inner groove and the depth D4 of the outer groove can be the same or different. After the inner groove 1111 and the outer groove 1121 are formed in the bending zone 1100, the bending zone 1100 retains a certain thickness, so that the minimum thickness D2 of the glass body can be 20μm to 30μm. That is, the distance between the bottom of the inner groove 1111 and the bottom of the outer groove 1121 is equal to the minimum thickness D2 of the glass body, so as to ensure the structural strength of the bending zone 1100.

[0082] In some embodiments of the present disclosure, Figure 7 As shown, optionally, the width W1 of the inner groove can be 1.0mm-3.0mm, and the width L1 of the inner rib can be 0.2mm-0.5mm; the width W2 of the outer groove can be 1.0mm-3.0mm, and the width W2 of the outer groove can be greater than the width W1 of the inner groove, and the width L2 of the outer rib can be 0.5mm-1.0mm, and the width L2 of the outer rib can be greater than the width L1 of the inner rib. In addition, the width W1 of the inner groove, the width L1 of the inner rib, the width W2 of the outer groove, and the width L2 of the outer rib can be adaptively adjusted according to the change of the bending radius of the bending zone 1100, so that the cover can meet the optical requirements, appearance requirements, bending performance and various reliability tests.

[0083] As an optional implementation, Figures 12 to 15 As shown, a plurality of inner oblique ribs 1113 are disposed in the inner groove 1111 ; a plurality of outer oblique ribs 1123 are disposed in the outer groove 1121 ; the material of the inner oblique ribs 1113 and / or the outer oblique ribs 1123 is the same as that of the glass body 1000 .

[0084] In some embodiments of the present disclosure, Figures 12 to 15As shown, the inner groove 1111 is a strip groove extending along the first direction F1, and the inner rib 1112 is a strip rib extending along the first direction F1; similarly, the outer groove 1121 is a strip groove extending along the first direction F1, and the outer rib 1122 is a strip rib extending along the first direction F1. In order to improve the crease defect of the cover plate and improve the protection performance of the cover plate, a plurality of inner oblique ribs 1113 may be provided in the inner groove 1111, and a plurality of outer oblique ribs 1123 may be provided in the outer groove 1121. That is to say, inner oblique ribs 1113 are added between adjacent inner ribs 1112, and outer oblique ribs 1123 are added between adjacent outer ribs 1122. The inner oblique ribs 1113 and the outer oblique ribs 1123 can eliminate stress concentration, absorb greater bending stress and deformation, and thus avoid the glass body 1000 from breaking during the bending process to a certain extent, so as to improve the anti-crease ability of the cover plate. In addition, by adding the inner oblique ribs 1113 and the outer oblique ribs 1123, the structural strength of the cover plate itself and the supporting performance and protection performance of the display panel can be improved.

[0085] In some embodiments of the present disclosure, Figures 12 to 15 As shown, the distance between adjacent inner oblique ribs 1113 may be greater than 20 mm, and the distance between adjacent outer oblique ribs 1123 may be greater than 20 mm, so as to avoid excessive rebound force in the bending zone 1100 due to the inner oblique ribs 1113 and the outer oblique ribs 1123 being too dense.

[0086] In some embodiments of the present disclosure, Figures 12 to 15 As shown, the material of the inner oblique ribs 1113 and the outer oblique ribs 1123 can be the same as that of the glass body 1000. For example, the inner oblique ribs 1113 and the outer oblique ribs 1123 can be reserved when the inner grooves 1111 and the outer grooves 1121 are etched in the bending area 1100 of the glass body 1000. The inner oblique ribs 1113 and the outer oblique ribs 1123 can also be added to the inner grooves 1111 and the outer grooves 1121 after the inner grooves 1111 and the outer grooves 1121 are etched in the bending area 1100 of the glass body 1000.

[0087] As an optional implementation, Figures 12 to 15 As shown, the angles between each inner oblique rib 1113 and the first direction F1 are the same, and the angles between each outer oblique rib 1123 and the first direction F1 are the same; and / or, the angles between each inner oblique rib 1113 and the first direction F1 are different, and the angles between each outer oblique rib 1123 and the first direction F1 are different.

[0088] In some embodiments of the present disclosure, the inner groove 1111 is a strip groove extending along the first direction F1, and the inner rib 1112 is a strip rib extending along the first direction F1. Fig.14 and Fig.15 As shown, the included angles between each inner oblique rib 1113 and the first direction F1 can be made the same, that is, the included angles between each inner oblique rib 1113 and the inner rib 1112 can be made the same.

[0089] In some embodiments of the present disclosure, the inner groove 1111 is a strip groove extending along the first direction F1, and the inner rib 1112 is a strip rib extending along the first direction F1. Fig.12 and Fig.13 As shown, the included angles between each inner oblique rib 1113 and the first direction F1 can be different, that is, the included angles between each inner oblique rib 1113 and the inner rib 1112 can be different. Fig.12 and Fig.13 As shown, the included angles between adjacent inner oblique ribs 1113 and inner ribs 1112 are the same but in different directions.

[0090] In some embodiments of the present disclosure, Figures 12 to 15 As shown, the inner oblique rib 1113 may be inclined at an angle of 45° to 60° relative to the inner rib 1112 , that is, the included angle between the inner oblique rib 1113 and the inner rib 1112 may be 45° to 60°.

[0091] Those skilled in the art may comprehensively consider the setting spacing, the inclination angle and the inclination direction of the inner oblique ribs 1113 relative to the first direction F1 according to the folding performance and the supporting performance of the cover plate.

[0092] In some embodiments of the present disclosure, the outer groove 1121 is a strip groove extending along the first direction F1, and the outer rib 1122 is a strip rib extending along the first direction F1. Optionally, the angle between each outer oblique rib 1123 and the first direction F1 can be the same, that is, the angle between each outer oblique rib 1123 and the outer rib 1122 can be the same.

[0093] In some embodiments of the present disclosure, the outer groove 1121 is a strip groove extending along the first direction F1, and the outer rib 1122 is a strip rib extending along the first direction F1. Optionally, the angle between each outer oblique rib 1123 and the first direction F1 can be different, that is, the angle between each outer oblique rib 1123 and the outer rib 1122 can be different. For example, the angles between adjacent outer oblique ribs 1123 and the outer rib 1122 are the same but in different directions.

[0094] In some embodiments of the present disclosure, optionally, the outer oblique rib 1123 may be inclined at an angle of 45° to 60° relative to the outer rib 1122 , that is, the included angle between the outer oblique rib 1123 and the outer rib 1122 may be 45° to 60°.

[0095] Those skilled in the art may comprehensively consider the setting spacing, the inclination angle and the inclination direction of the outer oblique ribs 1123 relative to the first direction F1 according to the folding performance and the supporting performance of the cover plate.

[0096] Based on the same inventive concept, the embodiment of the present disclosure further proposes a display module, which includes a flexible display panel and the above-mentioned cover plate, and the cover plate is stacked on the light-emitting side of the flexible display panel.

[0097] Since the display module provided by the present invention includes the cover plate of the above technical solution, the display module provided by the present invention has all the beneficial effects of the above cover plate, which will not be described in detail here.

[0098] Based on the same inventive concept, an embodiment of the present disclosure further proposes a display device, which includes the above-mentioned display module.

[0099] Since the display device provided by the present invention includes the display module of the above technical solution, the display device provided by the present invention has all the beneficial effects of the above display module, which will not be described in detail here.

[0100] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0101] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0102] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0103] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cover plate, characterized in that: The cover plate includes a glass body, an inner filler and an outer filler; the glass body includes a bending zone, the bending zone includes a bending inner side and a bending outer side opposite to the bending inner side; the bending inner side is provided with a plurality of inner grooves, and the bending outer side is provided with a plurality of outer grooves; the bending zone can be bent along a first direction, the inner groove and / or the outer groove are strip grooves extending along the first direction, an inner filler is provided in the inner groove, and an outer filler is provided in the outer groove; the modulus of the inner filler and the modulus of the outer filler are both smaller than the modulus of the glass body.

2. The cover plate according to claim 1, characterized in that: The refractive index of the inner filler is 80% to 120% of the refractive index of the glass body; the refractive index of the outer filler is 80% to 120% of the refractive index of the glass body.

3. The cover plate according to claim 2, characterized in that: The intersection corners of the inner grooves are arc-shaped, and the intersection corners of the outer grooves are arc-shaped.

4. The cover plate according to claim 1, characterized in that: An inner filling layer is stacked on the side of the glass body corresponding to the inner side of the bend, the material of the inner filling layer is the same as the material of the inner filler, and the thickness of the inner filling layer is 5.0μm to 20.0μm; an outer filling layer is stacked on the side of the glass body corresponding to the outer side of the bend, the material of the outer filling layer is the same as the material of the outer filler, and the thickness of the outer filling layer is 5.0μm to 20.0μm.

5. The cover plate according to claim 1, characterized in that: The ratio of the width of the inner groove to the width of the outer groove is (1.3-1.7):

1.

6. The cover plate according to claim 1, characterized in that: The modulus of the inner filler is greater than or equal to the modulus of the outer material.

7. The cover plate according to claim 1, characterized in that: The width of the inner groove is negatively correlated with the bending radius of the bending zone, and the width of the outer groove is negatively correlated with the bending radius of the bending zone; and / or, the depth of the inner groove is negatively correlated with the bending radius of the bending zone, and the depth of the outer groove is negatively correlated with the bending radius of the bending zone.

8. The cover plate according to any one of claims 1 to 7, characterized in that: A plurality of inner oblique ribs are arranged in the inner groove; a plurality of outer oblique ribs are arranged in the outer groove; and the material of the inner oblique ribs and / or the outer oblique ribs is the same as that of the glass body.

9. The cover plate according to claim 8, characterized in that: The angle between each inner oblique rib and the first direction is the same, and the angle between each outer oblique rib and the first direction is the same; and / or the angle between each inner oblique rib and the first direction is different, and the angle between each outer oblique rib and the first direction is different.

10. A display module, characterized in that: The display module comprises a flexible display panel and a cover plate as claimed in any one of claims 1 to 9, wherein the cover plate is stacked on a light emitting side of the flexible display panel.

11. A display device, characterized in that: The display device comprises the display module as claimed in claim 10.

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