Flexible cover plate, display module and preparation method therefor, and display apparatus

Abstract

A flexible cover plate (100), comprising: a glass cover plate (110) comprising a first surface (A1) and a second surface (A2) arranged opposite to each other, one side of the first surface (A1) of the glass cover plate (110) being provided with a groove (G) recessed towards one side of the second surface (A2), and the groove (G) extending in a first direction (D1); and an organic resin layer (120) located on one side of the first surface (A1) of the glass cover plate (110) and filling the groove (G). The glass cover plate (110) comprises a first portion (111), a second portion (112), and a third portion (113) which are sequentially connected, the first portion (111) being located at the bottom (Ga) of the groove (G), the second portion (112) being located at a side wall (Gb) of the groove (G), and the third portion (113) being located outside the groove (G). The thickness of the first portion (111) is less than the thickness of the third portion (113), and the thickness of the second portion (112) close to the first portion (111) is less than the thickness of the second portion (112) close to the third portion (113). The glass cover plate (110) comprises first side surfaces (A3) connecting the first surface (A1) and the second surface (A2), and the organic resin layer (120) covers the first surface (A1) and the side surfaces (A3) of the glass cover plate (110).

Description

Flexible cover plate, display module, its preparation method and display device Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a flexible cover plate, a display module, a method for manufacturing the same, and a display device. Background Technology

[0002] In recent years, foldable display products have been increasingly widely used. To meet the folding requirements, the flexible cover plate in foldable display products has poor performance in terms of impact resistance and surface flatness due to its low modulus and low stiffness. How to improve the impact resistance and surface flatness of the flexible cover plate while meeting the folding requirements is one of the important research topics for researchers.

[0003] The information disclosed in this section is only for understanding the background of the inventive concept of this disclosure, and therefore may include information that does not constitute prior art. Summary of the Invention

[0004] In one aspect, a flexible cover is provided, comprising:

[0005] A glass cover plate includes a first surface and a second surface disposed opposite to each other. A groove is provided on one side of the first surface of the glass cover plate, recessed towards one side of the second surface, and the groove extends along a first direction.

[0006] An organic resin layer is located on one side of the first surface of the glass cover and fills the groove.

[0007] The glass cover plate includes a first part, a second part, and a third part connected in sequence. The first part is located at the bottom of the groove, the second part is located at the sidewall of the groove, and the third part is located outside the groove. The thickness of the first part is less than the thickness of the third part, and the thickness of the second part near the first part is less than the thickness of the second part near the third part.

[0008] The glass cover includes a first side surface connecting the first surface and the second surface, and the organic resin layer covers the first surface and the side surface of the glass cover.

[0009] According to some exemplary embodiments, the thickness of the third portion is greater than or equal to twice the thickness of the first portion.

[0010] According to some exemplary embodiments, the ratio of the difference between the thickness of the first portion and the thickness of the third portion to the dimension of the second portion along the second direction is greater than or equal to 0.005 and less than or equal to 0.015, wherein the second direction is perpendicular to the first direction and parallel to the second surface.

[0011] According to some exemplary embodiments, the portion of the first surface located at the junction of the second portion and the first portion is a curved surface that convexes toward the side closer to the second surface; and / or

[0012] The portion of the first surface located at the junction of the second part and the third part is a curved surface that bulges away from the second surface.

[0013] According to some exemplary embodiments, the sidewalls of the groove are wavy, with the crests and troughs of the wavy shape alternating along the direction from the first portion to the third portion.

[0014] According to some exemplary embodiments, in a trough and two peaks adjacent to the trough, the distance between the trough and the peak near the first portion along a direction perpendicular to the second surface is a first distance, and the distance between the trough and the peak near the third portion along a direction perpendicular to the second surface is a second distance, wherein the first distance is smaller than the second distance.

[0015] According to some exemplary embodiments, the bottom of the groove is provided with at least one groove extending along the first direction, and the organic resin layer fills the groove.

[0016] According to some exemplary embodiments, the thickness of the first portion is greater than or equal to 0.02 mm and less than or equal to 0.07 mm, and / or the thickness of the third portion is greater than or equal to 0.06 mm and less than or equal to 0.2 mm.

[0017] According to some exemplary embodiments, the Young's modulus of the organic resin layer is greater than or equal to 50 MPa and less than or equal to 900 MPa.

[0018] According to some exemplary embodiments, the flexible cover plate further includes a first adhesive layer located on the side of the organic resin layer away from the glass cover plate, a protective layer located on the side of the first adhesive layer away from the organic resin layer, and a hardened coating located on the side of the protective layer away from the organic resin layer.

[0019] According to some exemplary embodiments, the Young's modulus of the organic resin layer is less than that of the protective layer, and / or the Young's modulus of the organic resin layer is greater than that of the first adhesive layer.

[0020] According to some exemplary embodiments, the thickness of the third portion is greater than the thickness of the protective layer, and / or the thickness of the first portion is less than the thickness of the protective layer.

[0021] In another aspect, a display module is provided, the display module including a display panel and a flexible cover plate as described in any of the preceding claims, the flexible cover plate being located on one side of the light-emitting surface of the display panel, and the second surface of the glass cover plate facing the display panel;

[0022] The display panel includes a foldable display section, two transition display sections located on both sides of the foldable display section, and two flat display sections located on the side of the two transition display sections away from the flat display section; and

[0023] The first part of the glass cover is located on one side of the foldable display section, the second part of the glass cover is located on one side of the transition display section, and the third part of the glass cover is located on one side of the flat display section.

[0024] According to some exemplary embodiments, the display module includes a folded state and an unfolded state. When the display module is in the folded state, the foldable display portion is configured to be bent into a semi-cylindrical shape with a bending radius R; and

[0025] When the display module is in the unfolded state, the dimension of the first portion along the second direction is greater than πR, and the second direction is perpendicular to the first direction and parallel to the second surface; and / or,

[0026] The first part completely covers the foldable display section.

[0027] According to some exemplary embodiments, when the display module is in a folded state, the display panel is located outside the flexible cover plate in a folded form;

[0028] The two flat panel display units are arranged opposite to each other and parallel to each other, and the distance between the two flat panel display units is less than 2R;

[0029] The transition display section includes a first transition section connected to the foldable display section, a second transition section connected to the side of the first transition section away from the foldable display section, and a third transition section connected between the second transition section and the flat display section; and

[0030] The first transition portion is curved, the second transition portion is flat, the third transition portion is curved, and the second portion of the glass cover plate at least covers the first transition portion.

[0031] According to some exemplary embodiments, the second portion of the glass cover covers the first transition portion, the second transition portion, and the third transition portion.

[0032] According to some exemplary embodiments, when the display module is in a folded display mode, the display panel is located inside the flexible cover plate in the folded mode; and

[0033] The second part of the glass cover plate covers the transition display section.

[0034] In another aspect, a method for manufacturing a display module is provided, the method comprising:

[0035] A flexible cover plate is formed on one side of the light-emitting surface of the display panel to obtain a display module mother plate. The flexible cover plate includes a glass cover plate located on the display panel and an organic resin layer located on the side of the glass cover plate away from the display panel. The glass cover plate includes a first surface and a second surface disposed opposite to each other, with the second surface facing the display panel. A groove is provided on one side of the first surface of the glass cover plate, recessed towards the second surface, and the groove extends along a first direction. The glass cover plate includes a first side surface connecting the first surface and the second surface. The organic resin layer covers the first surface and the side surface of the glass cover plate.

[0036] The display module motherboard is edge-cut along the cutting line to remove the portion of the display module motherboard located at the edge. The orthographic projection of the cutting line on the display panel surrounds the orthographic projection of the glass cover plate on the display panel.

[0037] In another aspect, a display device is provided, the display device comprising a flexible cover plate as described in any of the preceding claims or a display module as described in any of the preceding claims. Attached Figure Description

[0038] The features and advantages of this disclosure will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0039] Figure 1 schematically shows a cross-sectional view of a display module in the related art.

[0040] Figure 2 schematically shows a plan view of a flexible cover plate according to some embodiments of the present disclosure.

[0041] Figure 3 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure.

[0042] Figure 4 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure.

[0043] Figure 5 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure.

[0044] Figure 6 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure.

[0045] Figure 7 schematically shows a plan view of a flexible cover plate according to some embodiments of the present disclosure.

[0046] Figure 8 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure.

[0047] Figures 9A-9F schematically illustrate methods for preparing flexible cover plates according to some embodiments of the present disclosure.

[0048] Figure 10 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure.

[0049] Figure 11 schematically shows a cross-sectional view of a display module according to some embodiments of the present disclosure.

[0050] Figure 12A schematically shows a plan view of a display panel in a display module according to some embodiments of the present disclosure.

[0051] Figure 12B schematically shows a plan view of a display panel in a display module according to some embodiments of the present disclosure.

[0052] Figure 13 schematically shows a cross-sectional view of a display module in a folded state according to some embodiments of the present disclosure.

[0053] Figure 14 schematically shows a cross-sectional view of a display module in a folded state according to some embodiments of the present disclosure.

[0054] Figure 15 schematically illustrates a flowchart of a method for preparing a display module according to some embodiments of the present disclosure.

[0055] Figures 16A-16D schematically illustrate the fabrication process of a display module according to some embodiments of the present disclosure. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the protection scope of this disclosure.

[0057] It should be noted that, for clarity and / or descriptive purposes, the dimensions and relative dimensions of components may be enlarged in the accompanying drawings. Therefore, the dimensions and relative dimensions of the individual components are not necessarily limited to those shown in the drawings. In the specification and accompanying drawings, the same or similar reference numerals indicate the same or similar parts.

[0058] When an element is described as being "on" another element, "connected to" another element, or "attached to" another element, the element may be directly on, directly connected to, or directly attached to the other element, or there may be intermediate elements. However, when an element is described as being "directly on" another element, "directly connected to" another element, or "directly attached to" another element, there are no intermediate elements. Other terms and / or expressions used to describe relationships between elements should be interpreted in a similar manner, such as "between" versus "directly between," "adjacent" versus "directly adjacent," or "on" versus "directly on," etc. Furthermore, the term "connection" can refer to a physical connection, an electrical connection, a communication connection, and / or a fluid connection. Moreover, the X-axis, Y-axis, and Z-axis are not limited to the three axes of a Cartesian coordinate system and can be interpreted in a broader sense. For example, the X-axis, Y-axis, and Z-axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z such as XYZ, XY, YZ, and XZ. As used herein, the term “and / or” includes any and all combinations of one or more of the listed related items.

[0059] It should be noted that although the terms "first," "second," etc., may be used herein to describe various components, members, elements, regions, layers, and / or parts, these components, members, elements, regions, layers, and / or parts should not be limited by these terms. Rather, these terms are used to distinguish one component, member, element, region, layer, and / or part from another. Thus, for example, the first component, first member, first element, first region, first layer, and / or first part discussed below may be referred to as a second component, second member, second element, second region, second layer, and / or second part without departing from the teachings of this disclosure.

[0060] For ease of description, spatial relation terms, such as “above,” “below,” “left,” “right,” etc., may be used herein to describe the relationship between one element or feature and another element or feature as shown in the figure. It should be understood that spatial relation terms are intended to cover other orientations of the device in use or operation besides those described in the figure. For example, if the device in the figure were inverted, an element described as “below” or “under” other elements or features would be oriented “above” or “on top” other elements or features.

[0061] In this document, the terms “substantially,” “approximately,” “approximately,” “roughly,” and other similar terms are used as terms of approximation rather than as terms of degree, and they are intended to account for inherent deviations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art. Taking into account factors such as process variations, measurement problems, and errors associated with the measurement of a particular quantity (i.e., limitations of the measurement system), “approximately” as used herein includes stated values ​​and indicates that a particular value is within an acceptable range of deviation for one of ordinary skill in the art. For example, “approximately” may mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0062] It should be noted that in this paper, "same layer" refers to a layer structure formed by using the same film deposition process to form a film layer for a specific pattern, and then using the same mask to pattern that film layer in a single patterning process. Depending on the specific pattern, a single patterning process may include multiple exposure, development, or etching processes, and the specific pattern in the formed layer structure can be continuous or discontinuous. That is, multiple elements, components, structures, and / or portions located in the "same layer" are made of the same material and formed by the same single patterning process. Typically, multiple elements, components, structures, and / or portions located in the "same layer" have approximately the same thickness.

[0063] Those skilled in the art will understand that, unless otherwise stated herein, the terms “height” or “thickness” refer to the dimensions along the surface of each film layer disposed perpendicular to the display substrate, i.e., the dimensions along the light-emitting direction of the display substrate, or the dimensions along the normal direction of the display device.

[0064] Figure 1 schematically shows a cross-sectional view of a display module in the related art.

[0065] Referring to Figure 1, the display module includes a display panel, a polarizing layer located on the light-emitting side of the display panel, an optical adhesive layer located on the side of the polarizing layer away from the display panel, a flexible cover plate located on the side of the optical adhesive layer away from the display panel, a back film layer located on the side of the display panel away from the polarizing layer, an adhesive layer located on the side of the back film layer away from the display panel, and a support layer located on the side of the adhesive layer away from the display panel.

[0066] The flexible cover plate includes a cover plate base film and a hardened coating located on the side of the cover plate base film away from the display panel. The cover plate base film can be composed of one to three layers of transparent polyimide film (CPI) and transparent polyethylene terephthalate (PET) film. Both CPI and PET have relatively low stiffness, resulting in poor impact resistance and surface flatness of the display module.

[0067] Optionally, the cover plate base film can be composed of either CPI or PET combined with ultra-thin glass (UTG). To meet bending performance requirements, the thickness of UTG is set relatively thin, for example, ≤0.03mm. This ultra-thin design results in UTG being flexible but lacking rigidity, failing to provide better protection and support for the flexible module in terms of flatness and resistance to external impacts.

[0068] Figure 2 schematically shows a plan view of a flexible cover plate according to some embodiments of the present disclosure. Figure 3 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure, wherein Figure 3 schematically shows a cross-sectional view taken along line AA' in Figure 2.

[0069] Referring to Figures 2 and 3, the flexible cover plate 100 includes a glass cover plate 110 and an organic resin layer 120 located on the glass cover plate 110. The glass cover plate 110 includes a first surface A1 and a second surface A2 disposed opposite to each other. The second surface A2 of the glass cover plate 110 is substantially planar. A groove G is provided on one side of the first surface A1 of the glass cover plate 110, which is recessed into the second surface A2. The groove G extends along a first direction D1 and penetrates the two sides of the glass cover plate 110 located on both sides of the first direction D1.

[0070] The groove G includes a groove bottom Ga and sidewalls Gb connected to both sides of the groove bottom Ga along a second direction D2. The second direction D2 is perpendicular to the first direction D1 and parallel to the second surface A2. That is, the glass cover 110 includes a first part 111, a second part 112, and a third part 113 connected sequentially along the second direction D2. The portion of the glass cover 110 located at the groove bottom Ga of the groove G is the first part 111, the portion of the glass cover 110 located at the sidewalls Gb of the groove G is the second part 112, and the portion of the glass cover 110 located outside the groove G is the third part 113. The thickness THK1 of the first part 111 along the direction perpendicular to the second surface A2 is less than the thickness THK2 of the third part 113 along the direction perpendicular to the second surface A2. The thickness of the second part 112 near the first part 111 is less than the thickness of the second part 112 near the third part 113.

[0071] An organic resin layer 120 is located on one side of the first surface A1 of the glass cover plate 110 and fills the groove G. The side of the organic resin layer 120 away from the glass cover plate 110 has a flat surface. The glass cover plate 110 includes a first side surface A3 connecting the first surface A1 and the second surface A2. The organic resin layer 120 extends from the first surface A1 of the glass cover plate 110 to the first side surface A3 of the glass cover plate 110 and covers the first surface A1 and the first side surface A3 of the glass cover plate 110. The portion of the organic resin layer 120 on the first surface A1 of the glass cover plate 110 and the portion on the first side surface A3 of the glass cover plate 110 are connected as an integral structure. As can be seen from the schematic plan view in Figure 2, the orthographic projection of the glass cover plate 110 is located within the orthographic projection of the organic resin layer 120.

[0072] In the flexible cover plate 100 provided in this embodiment, a groove G is provided on one side of the glass cover plate 110. The thickness of the first part 111 and the second part 112 located at the groove G is less than the thickness of the third part 113 located where the groove G is not provided. When the flexible cover plate 100 is applied to a foldable display module, the first part 111 and the second part 112 are located in the foldable display area and the transition display area of ​​the foldable display module, respectively, and the third part 113 is located in the planar display area of ​​the foldable display module. On the one hand, since the first part 111 has a thinner thickness, it can better meet the folding requirements. On the other hand, since the third part 113 has a thicker thickness, it has higher strength, thereby improving the overall impact resistance and surface flatness of the foldable display module.

[0073] Furthermore, since the organic resin layer 120 extends from the first surface A1 of the glass cover plate 110 to the first side surface A3 of the glass cover plate 110, the cutting line can be positioned on the portion of the organic resin layer 120 located on the first side surface A3 of the glass cover plate 110 during the cutting process after assembling the flexible cover plate 100 and the display panel. This prevents the cutting of the high-hardness glass cover plate 110 during the cutting process, thereby significantly improving the cutting yield.

[0074] It should be noted that the flexible cover plate 100 shown in Figures 2 and 3 includes only one groove G, meaning that the flexible cover plate 100 can only be folded once. Depending on the actual folding requirements, two or more grooves G can also be provided. When multiple grooves G are provided, the structure of the other grooves G can be consistent with the structure of the groove G shown in the figure.

[0075] According to some exemplary embodiments, referring to FIG3, the thickness THK2 of the third portion 113 in the direction perpendicular to the second surface A2 is greater than or equal to twice the thickness THK1 of the first portion 111 in the direction perpendicular to the second surface A2. In this way, the flexible cover plate 100 can have both good bending performance and impact resistance.

[0076] According to some exemplary embodiments, the thickness THK1 of the first part 111 is greater than or equal to 0.02 mm and less than or equal to 0.07 mm, and the thickness THK2 of the third part 113 is greater than or equal to 0.06 mm and less than or equal to 0.2 mm.

[0077] For example, the thickness THK1 of the first part 111 is 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm or 0.07mm, etc.

[0078] For example, the thickness THK2 of the third part 113 is 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm or 0.2mm, etc.

[0079] According to some exemplary embodiments, the Young's modulus of the organic resin layer 120 is greater than or equal to 50 MPa and less than or equal to 900 MPa. The Young's modulus of the organic resin layer 120 should not be set too small, otherwise the flexible cover plate 100 will have insufficient rigidity at the location where the groove G is provided. The Young's modulus of the organic resin layer 120 should also not be set too large, otherwise the flexible cover plate 100 will warp after bending.

[0080] For example, the Young's modulus of the organic resin layer 120 is 50 MPa, 100 MPa, 200 MPa, 300 MPa, 400 MPa, 500 MPa, 600 MPa, 700 MPa, 800 MPa or 900 MPa, etc.

[0081] According to some exemplary embodiments, referring to FIG3, the bottom Ga of the groove G is a plane substantially parallel to the second surface A2, the sidewall Gb of the groove G is a plane inclined at a certain angle relative to the second surface A2, the bottom Ga of the groove G and the sidewall Gb of the groove G form an obtuse angle, the cross-sectional shape of the groove G perpendicular to the second surface A2 is an inverted trapezoid, the thickness of the first part 111 located at the bottom Ga of the groove G is substantially equal at all points, and the thickness of the second part 112 gradually increases in the direction away from the first part 111.

[0082] According to some exemplary embodiments, referring to FIG3, the difference between the thickness THK1 of the first part 111 and the thickness THK2 of the third part 113 and the ratio of the dimension W1 of the second part 112 along the second direction D2 is greater than or equal to 0.005 and less than or equal to 0.015. This makes the slope angle of the sidewall Gb of the groove G within a predetermined range, which greatly reduces the difficulty of forming the groove G.

[0083] Figure 4 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure.

[0084] According to some exemplary embodiments, referring to FIG4, the portion of the first surface A1 located at the connection between the second portion 112 and the first portion 111 is a curved surface that protrudes towards the side closer to the second surface A2. The groove bottom Ga and the side wall Gb of the groove G are connected by rounded corners, which can reduce the bending stress at the junction when bending, and further improve the bending capability of the flexible cover plate 100.

[0085] It should be noted that when the surface of the connection between the second part 112 and the first part 111 is rounded, the part located at the rounded corner should be understood as part of the second part 112. The surface of the first part 111 near the organic resin layer 120 is basically flat.

[0086] According to some exemplary embodiments, referring to FIG4, the portion of the first surface A1 located at the junction of the second portion 112 and the third portion 113 is a curved surface that protrudes away from the second surface A2. The sidewall Gb of the groove G and the surface of the glass cover plate 110 where the groove G is not provided are connected by rounded corners, which can reduce the bending stress at the junction when bending and further improve the bending ability of the flexible cover plate 100.

[0087] It should be noted that when the surface of the connection between the second part 112 and the third part 113 is rounded, the part located at the rounded corner should be understood as part of the second part 112, and the surface of the third part 113 near the organic resin layer 120 is basically flat.

[0088] Figure 5 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure.

[0089] According to some exemplary embodiments, referring to FIG5, the sidewall Gb of the groove G is stepped, and the sidewall Gb of the groove G has at least one step portion J, the step portion J having a step slope J1 and a step plane J2, the step plane J2 being substantially parallel to the second surface A2, the step slope J1 being inclined relative to the second surface A2, and the step slope J1 and the step plane J2 forming an obtuse angle. Specifically, along the direction away from the first portion 111, the step slope J1 has an inclined trend that gradually moves away from the second surface A2. By setting the sidewall Gb of the groove G to be stepped, such that a portion of the sidewall Gb of the groove G is a plane parallel to the second surface A2, the display effect of the display module including the flexible cover plate 100 located at the sidewall Gb of the groove G can be improved.

[0090] It should be noted that Figure 5 shows that the flexible cover plate 100 has a step J at the side wall Gb of the groove G. The number of steps J can be two, three or more. The size and inclination angle of the step J can also be set according to the actual process requirements. This embodiment does not limit this.

[0091] Figure 6 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure.

[0092] According to some exemplary embodiments, referring to FIG6, the sidewall Gb of the groove G is wavy, with the crests M and troughs N of the wave alternating along the direction from the first portion 111 to the third portion 113. The structure of the flexible cover plate 100 shown in FIG6 at the sidewall Gb of the groove G is similar to that shown in FIG5, both being stepped. The only difference is that in the flexible cover plate 100 shown in FIG6, the sharp corners present at the sidewall Gb of the groove G are all rounded, thus making the sidewall Gb of the groove G wavy. This configuration not only improves the display effect of the display module including the flexible cover plate 100 at the sidewall Gb of the groove G, but also reduces the bending stress of the flexible cover plate 100 at the sidewall Gb of the groove G when bent.

[0093] According to some exemplary embodiments, referring to FIG6, in a trough N and two adjacent peaks M, the distance between the trough N and the peak M near the first portion 111 along the direction perpendicular to the second surface A2 is a first distance D1, and the distance between the trough N and the peak M near the third portion 113 along the direction perpendicular to the second surface A2 is a second distance D2. The first distance D1 is smaller than the second distance D2. This arrangement makes the slope of the sidewall Gb located between the trough N and the peak M near the first portion 111 gentler. This gentler slope can effectively improve the display effect of the display module including the flexible cover plate 100 at the sidewall Gb located in the groove G.

[0094] Figure 7 schematically shows a plan view of a flexible cover plate according to some embodiments of the present disclosure. Figure 8 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure, wherein Figure 8 schematically shows a cross-sectional view taken along line BB' in Figure 7.

[0095] According to some exemplary embodiments, referring to Figures 7 and 8, at least one groove X extending along the first direction D1 is provided on the surface of the first portion 111 that contacts the organic resin layer 120. That is, the bottom Ga of the groove G is provided with a groove X that is recessed towards the second surface A2, and the organic resin layer 120 fills the groove X. By providing this groove X, the bending stress generated in the portion of the flexible cover plate 100 located at the bottom Ga of the groove G can be reduced when it is bent. In addition, the adhesion between the organic resin layer 120 and the glass cover plate 110 can be increased, avoiding the problem of peeling at the interface between the organic resin layer 120 and the glass cover plate 110 due to repeated bending.

[0096] For example, the bottom Ga of the groove G is provided with multiple grooves X arranged along the second direction D2 and extending along the first direction D1. These grooves X penetrate the glass cover plate 110 along the first direction D1 and are located on both sides of the first direction D1. The size of the grooves X is set according to the actual process requirements. For example, the depth of the grooves X perpendicular to the second surface A2 can be 0.1 mm.

[0097] It should be noted that when the bottom Ga of the groove G is provided with a groove X, the thickness of the first part 111 should be understood as the thickness where the groove X is not provided.

[0098] In addition, in the flexible cover plate 100 shown in Figure 5 or Figure 6, the groove X can also be provided at the bottom Ga of the groove G as needed.

[0099] Figures 9A-9F schematically illustrate methods for preparing flexible cover plates according to some embodiments of the present disclosure.

[0100] The following diagram illustrates the preparation method of the flexible cover plate with reference to Figures 9A-9F.

[0101] Referring to Figure 9A, a photoresist layer PR is formed by coating a glass 110' with a specified thickness.

[0102] Referring to Figures 9A and 9B, an exposure and development process is performed on the photoresist layer PR, so that the photoresist layer PR is transformed into a photoresist pattern layer PR' with a predetermined pattern. Specifically, the portion of the photoresist layer PR located in the area where the groove needs to be formed is removed.

[0103] Referring to Figure 9C, the glass 110' is etched under the cover of the photoresist pattern layer PR'. By controlling the etching process, a groove G with the required shape is formed, thus obtaining the glass cover plate 110.

[0104] Referring to Figures 9C and 9D, the photoresist pattern layer PR' located on the glass cover plate 110 is peeled off.

[0105] Referring to Figures 9E and 9F, organic resin adhesive 120' is applied to the surface of the glass cover plate 110 with groove G and the side surface of the glass cover plate 110, and the organic resin adhesive 120' applied to the glass cover plate 110 is cured to obtain an organic resin layer 120, which covers the first surface A1 and the first side surface A3 of the glass cover plate 110 with groove G.

[0106] Referring to Figure 9F, the portion of the organic resin layer 120 located on the first side A3 of the glass cover plate 110 has a thickness of 1 mm or more in the direction perpendicular to the first side A3. This effectively avoids cutting defects caused by cutting the glass cover plate 110 during the cutting process after assembling the flexible cover plate and the display panel.

[0107] Figure 10 schematically shows a cross-sectional view of a flexible cover plate according to some embodiments of the present disclosure.

[0108] According to some exemplary embodiments, referring to FIG10, the flexible cover plate 100 further includes a first adhesive layer 130 located on the side of the organic resin layer 120 away from the glass cover plate 110, a protective layer 140 located on the side of the first adhesive layer 130 away from the organic resin layer 120, and a hardened coating 150 located on the side of the protective layer 140 away from the organic resin layer 120.

[0109] For example, the material of the first adhesive layer 130 includes optically clear adhesive (OCA), and the thickness of the first adhesive layer 130 is less than or equal to 50 μm.

[0110] For example, the protective layer 140 can be a transparent polyimide film or a polyethylene terephthalate film, and the thickness of the protective layer 140 can be 50 μm-80 μm. Exemplarily, the thickness of the protective layer 140 can be 50 μm, 60 μm, 70 μm, or 80 μm, etc.

[0111] For example, the hardened coating 150 is made of a material with high hardness, which can improve the surface scratch resistance of the flexible cover plate 100.

[0112] According to some exemplary embodiments, referring to FIG10, the Young's modulus of the organic resin layer 120 is less than that of the protective layer 140, and the Young's modulus of the organic resin layer 120 is greater than that of the first adhesive layer 130. This arrangement ensures that the Young's modulus of each layer is within a suitable range, thereby enabling the flexible cover plate 100 to have both good bending performance and impact resistance.

[0113] According to some exemplary embodiments, referring to Figures 3 and 10, the thickness THK2 of the third part 113 is greater than the thickness THK3 of the protective layer 140, and the thickness THK1 of the first part 111 is less than the thickness THK3 of the protective layer 140. This arrangement allows the flexible cover plate 100 to have both good bending performance and impact resistance.

[0114] Figure 11 schematically shows a cross-sectional view of a display module according to some embodiments of the present disclosure. Figure 12A schematically shows a plan view of a display panel in a display module according to some embodiments of the present disclosure. Figure 12B schematically shows a plan view of a display panel in a display module according to some embodiments of the present disclosure.

[0115] Other embodiments of this disclosure also provide a display module. Referring to Figures 3, 11 and 12A, the display module includes a display panel 200 and a flexible cover plate 100 of any of the preceding claims. The flexible cover plate 100 is located on one side of the light-emitting surface of the display panel 200, and the second surface A2 of the glass cover plate 110 faces the display panel 200.

[0116] The display panel 200 includes a foldable display section 210, two transition display sections 220 located on both sides of the foldable display section 210, and two flat display sections 230 located on the side of the two transition display sections 220 away from the foldable display section 210. A first portion 111 of the glass cover 110 is located on one side of the foldable display section 210, a second portion 112 of the glass cover 110 is located on one side of the transition display section 220, and a third portion 113 of the glass cover 110 is located on one side of the flat display section 230.

[0117] The display module includes a folded state and an unfolded state. When the display module is in the unfolded state, the foldable display section 210, the transition display section 220 and the flat display section 230 of the display panel 200 are on the same plane, thereby providing a larger display area. When the display module is in the folded state, the foldable display section 210 is bent, and the two flat display sections 230 are arranged opposite each other. The overall size of the display module is small, which improves the portability of the display module.

[0118] It should be noted that in the plan view of the display panel 200 shown in Figures 12A and 12B, only one foldable display section 210 is included, that is, the display panel 200 can only be folded once. Depending on the actual folding requirements, two or more foldable display sections 210 can also be provided. Correspondingly, the number of transition display sections 220 and flat display sections 230 are also increased.

[0119] According to some exemplary embodiments, referring to FIG11, the display module further includes a polarizer POL located on the light-emitting side of the display panel 200. The polarizer POL is bonded to the glass cover plate 110 in the flexible cover plate 100 via a second adhesive layer OCA. The polarizer POL can reduce reflections generated when ambient light shines on the display panel 200, thereby improving display contrast.

[0120] For example, the thickness of the polarizing layer is 45μm-70μm. Exemplarily, the thickness of the polarizing layer is 45μm, 50μm, 55μm, 60μm, 65μm, or 70μm, etc.

[0121] It should be noted that polarization-free technology (Pol-Less) can also be used, in which the polarization layer is built into the display panel 200, thereby further improving the thinness and bending performance of the display module.

[0122] According to some exemplary embodiments, referring to FIG11, the display module further includes a back film layer BF located on the side of the display panel 200 away from the polarizer POL, a third adhesive layer PSA located on the side of the back film layer BF away from the display panel 200, and a support layer 300 located on the side of the third adhesive layer PSA away from the display panel 200.

[0123] For example, the back film layer (BF) may include a polyimide film or a polyethylene terephthalate film. The back film layer (BF) is used to lift and support the back of the display panel 200, and the thickness of the back film layer (BF) can be 30 μm to 80 μm. Exemplarily, the thickness of the back film layer (BF) can be 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, or 80 μm.

[0124] For example, the material of the third adhesive layer PSA includes pressure-sensitive adhesives (PSA).

[0125] For example, the support layer 300 can be a carbon fiber plate, a stainless steel plate or an aluminum alloy plate. The support layer 300 has a specific pattern cutout in the area of ​​the foldable display part 210 of the corresponding display panel 200. The support layer 300 can provide better support for the back of the display panel 200.

[0126] Figure 13 schematically shows a cross-sectional view of a display module in a folded state according to some embodiments of the present disclosure. Figure 14 schematically shows a cross-sectional view of a display module in a folded state according to some embodiments of the present disclosure. In order to more clearly illustrate the structure of the display module in the folded state, Figures 13 and 14 only briefly illustrate the display module and the flexible cover plate, and the specific structure of the flexible cover plate is omitted.

[0127] The folded states of the display module include inward folding and outward folding. The cross-sectional view of the display module in the inward folding state is shown in Figure 13, and the cross-sectional view of the display module in the outward folding state is shown in Figure 14.

[0128] Referring to Figures 12B and 13, when the display module is in the inward folded state, the display panel 200 is located outside the flexible cover plate 100 in the folded state. The foldable display section 210 is configured to be bent into a semi-cylindrical shape with a bending radius of R, and the two flat display sections 230 are arranged parallel and opposite to each other, with a distance of less than 2R between the two flat display sections 230.

[0129] The transition display section 220 includes a first transition section 221, a second transition section 222, and a third transition section 223 connected in sequence. One end of the first transition section 221 is connected to the foldable display section 210, and the other end is curved in a direction away from the virtual bending axis of the foldable display section 210. The second transition section 222 is planar and forms an obtuse angle with the virtual extension of the adjacent planar display section 230. One end of the second transition section 222 is connected to the first transition section 221, and the other end extends towards the adjacent planar display section 230. The third transition section 223 connects the second transition section 222 and the planar display section 230, and the third transition section 223 is curved and bends towards another third transition section 223.

[0130] The foldable display section 210 and the two transition display sections 220 are in the "teardrop" shape when folded inward. When unfolded, the size of the second transition section 222 along the second direction D2 is larger than the size of the third transition section 223 along the second direction D2, and the size of the third transition section 223 along the second direction D2 is larger than the size of the first transition section 221 along the second direction D2.

[0131] Referring to Figures 12A and 14, when the display module is in its outward-folded state, the display panel 200 is located inside the flexible cover plate 100 in its folded state. The foldable display section 210 is configured to be bent into a semi-cylindrical shape with a bending radius of R. The two flat display sections 230 are arranged parallel to each other and opposite to each other, with a distance of 2R between the two flat display sections 230. The transition display section 220 connecting the flat display section 230 and the foldable display section 210 is substantially planar. In the unfolded state, the dimension of the transition display section 220 along the second direction D2 is smaller than the dimension of the transition display section 220 along the second direction D2 in the display module in its inward-folded state as shown in Figure 13.

[0132] It should be noted that for display modules that fold outwards, when assembling the display module into a display device, the side of the support layer 300 away from the display panel 200 needs to be glued to the outer shell of the display device. The adhesive should be glued to the area where the flat display section 230 is located. Since there may be some deviation during the gluing process, in order to avoid the adhesive from being glued to the foldable display area, the area where the adhesive is glued needs to be spaced at a predetermined distance from the area where the flat display section 230 is located. This spaced area should be understood as the area where the transition display section 220 is located.

[0133] Furthermore, for the inwardly folded display module shown in Figure 13, when assembling the display module into a display device, it is also necessary to attach the side of the support layer 300 away from the display panel 200 to the outer shell of the display device, with the adhesive applied to the area where the flat display section 230 and the second transition section 222 are located.

[0134] According to some exemplary embodiments, referring to Figures 3, 13, and 14, when the display module is in an inward-folded or outward-folded state, the foldable display portion 210 is configured to be bent into a semi-cylindrical shape with a bending radius of R. When the display module is in the unfolded state, the dimension W2 of the first portion 111 along the second direction D2 is greater than πR, that is, the first portion 111 completely covers the foldable display portion 210. This configuration ensures that the display module has good bending performance and effectively avoids warping during bending.

[0135] It should be noted that, considering that there may be some deviation during the bonding process of the flexible cover plate 100 and the display panel, in order to ensure that the first part 111 can completely cover the foldable display part 210, the dimension W2 of the first part 111 along the second direction D2 needs to be greater than πR. The difference between W2 and πR is set according to the bonding accuracy.

[0136] According to some exemplary embodiments, referring to Figures 3, 12B, and 13, the display module is folded inward. When the display module is in the unfolded state, the dimension W1 of the second portion 112 along the second direction D2 is greater than or equal to the dimension of the first transition portion 221 along the second direction D2. That is, the second portion 112 of the glass cover plate 110 at least covers the first transition portion 221. This configuration ensures that the display module has good bending performance and effectively avoids warping during bending.

[0137] According to some exemplary embodiments, referring to Figures 3, 12B, and 13, when the display module is in the unfolded state, the dimension W1 of the second portion 112 along the second direction D2 is greater than or equal to the sum of the dimensions of the first transition portion 221, the second transition portion 222, and the third transition portion 223 along the second direction D2. That is, the second portion 112 of the glass cover 110 covers the first transition portion 221, the second transition portion 222, and the third transition portion 223. This configuration further improves the bending performance of the display module and effectively avoids warping during bending.

[0138] According to some exemplary embodiments, referring to Figures 3, 12A and 14, the display module is folded outwards. When the display module is in the unfolded state, the size of the second part 112 along the second direction D2 is greater than or equal to the size of the transition part along the second direction D2. That is, the second part 112 of the glass cover 110 covers the transition part. This arrangement can ensure that the display module has good bending performance and effectively avoid the problem of warping when bending.

[0139] It should be noted that during the design process, the dimension of the second part 112 along the second direction D2 should first satisfy the condition shown in Figure 3, which is that "the ratio of the difference between the thickness THK1 of the first part 111 and the thickness THK2 of the third part 113 to the dimension W1 of the second part 112 along the second direction D2 is greater than or equal to 0.005 and less than or equal to 0.015". Based on satisfying this condition, the dimensions are then set according to the folding shape of the display module and the dimensions of the transition part to ensure good bending performance.

[0140] Figure 15 schematically illustrates a flowchart of a method for preparing a display module according to some embodiments of the present disclosure.

[0141] Referring to Figure 15, the method for manufacturing the display module includes the following steps S10 and S20.

[0142] In step S10, a flexible cover plate is formed on one side of the light-emitting surface of the display panel to obtain a display module mother plate. The flexible cover plate includes a glass cover plate located on the display panel and an organic resin layer located on the side of the glass cover plate away from the display panel. The glass cover plate includes a first surface and a second surface disposed opposite to each other. The second surface faces the display panel. A groove is provided on one side of the first surface of the glass cover plate that is recessed into the second surface. The groove extends along a first direction. The glass cover plate includes a first side surface that connects the first surface and the second surface. The organic resin layer covers the first surface and the side surface of the glass cover plate.

[0143] In step S20, the display module motherboard is edge-cut along the cutting line to remove the portion of the display module motherboard located at the edge. The orthographic projection of the cutting line on the display panel surrounds the orthographic projection of the glass cover plate on the display panel.

[0144] Figures 16A-16D schematically illustrate the fabrication process of a display module according to some embodiments of the present disclosure.

[0145] Referring to Figure 16A, a polarizer POL is formed on one side of the light-emitting surface of the display panel 200. A flexible cover plate 100 is attached to the side of the polarizer POL away from the display panel 200 through a second adhesive layer OCA. A back film layer BF is attached to the side of the display panel 200 away from the flexible cover plate 100 to obtain the display module motherboard.

[0146] The flexible cover plate 100 includes a glass cover plate 110 located on the display panel 200, an organic resin layer 120 located on the side of the glass cover plate 110 away from the display panel 200, a first adhesive layer 130 located on the side of the organic resin layer 120 away from the glass cover plate 110, a protective layer 140 located on the side of the first adhesive layer 130 away from the organic resin layer 120, and a hardened coating 150 located on the side of the protective layer 140 away from the organic resin layer 120. The glass cover plate 110 includes a first surface A1 and a second surface A2 disposed opposite to each other, the second surface A2 facing the display panel 200. A groove G is provided on the first surface A1 of the glass cover plate 110 that is recessed into the second surface A2. The glass cover plate 110 includes a first side surface A3 connecting the first surface A1 and the second surface A2. The organic resin layer 120 covers the first surface A1 and the first side surface A3 of the glass cover plate 110.

[0147] Referring to Figures 16A, 16B, and 16C, the display module motherboard shown in Figure 16A is edge-cut CL to remove the portion of the display module motherboard located at the edge. The orthographic projection of the cutting line CL on the display panel 200 surrounds the orthographic projection of the glass cover plate 110 on the display panel 200. That is, during the cutting process, the glass cover plate 110 in the flexible cover plate 100 will not be cut, which can greatly improve the cutting yield.

[0148] For example, before cutting, the portion of the organic resin layer 120 on the first side A3 of the flexible cover plate 100 has a thickness greater than or equal to 1 mm in the direction perpendicular to the first side A3 of the flexible cover plate 100, and the portion remaining on the first side A3 of the flexible cover plate 100 after cutting has a thickness less than or equal to 0.25 mm in the direction perpendicular to the first side A3 of the flexible cover plate 100. This can achieve a higher cutting yield and a narrower border after cutting.

[0149] Referring to Figures 16C and 16D, after cutting, the support layer 300 is attached to the back film layer BF on the side away from the display panel 200 via the third adhesive layer PSA, thus preparing the display module.

[0150] Other embodiments of this disclosure also provide a display device, which includes the flexible cover plate or the display module described above. The display device may include any device or product with display functionality. For example, the display device may be a smartphone, mobile phone, e-book reader, desktop computer (PC), laptop PC, netbook PC, personal digital assistant (PDA), portable multimedia player (PMP), digital audio player, mobile medical device, camera, wearable device (e.g., head-mounted device, electronic clothing, electronic bracelet, electronic necklace, electronic accessory, electronic tattoo, or smartwatch), television set, etc.

[0151] It should be understood that the display module and display device according to the embodiments of this disclosure have all the features and advantages of the flexible cover plate described above, as detailed in the above description, which will not be repeated here. Although some embodiments of the overall technical concept of this disclosure have been shown and described, those skilled in the art will understand that changes can be made to these embodiments without departing from the principles and spirit of the overall technical concept, the scope of which is defined by the claims and their equivalents.

Claims

1. A flexible cover plate, wherein, The flexible cover plate includes: A glass cover plate includes a first surface and a second surface disposed opposite to each other. A groove is provided on one side of the first surface of the glass cover plate, recessed towards one side of the second surface, and the groove extends along a first direction. An organic resin layer is located on one side of the first surface of the glass cover and fills the groove. The glass cover plate includes a first part, a second part, and a third part connected in sequence. The first part is located at the bottom of the groove, the second part is located at the sidewall of the groove, and the third part is located outside the groove. The thickness of the first part is less than the thickness of the third part, and the thickness of the second part near the first part is less than the thickness of the second part near the third part. The glass cover includes a first side surface connecting the first surface and the second surface, and the organic resin layer covers the first surface and the side surface of the glass cover.

2. The flexible cover plate according to claim 1, wherein, The thickness of the third part is greater than or equal to twice the thickness of the first part.

3. The flexible cover plate according to claim 1 or 2, wherein, The ratio of the difference between the thickness of the first part and the thickness of the third part to the dimension of the second part along the second direction is greater than or equal to 0.005 and less than or equal to 0.015, whereby the second direction is perpendicular to the first direction and parallel to the second surface.

4. The flexible cover plate according to any one of claims 1-3, wherein, The portion of the first surface located at the connection between the second portion and the first portion is a curved surface that bulges towards the side closer to the second surface; and / or The portion of the first surface located at the junction of the second part and the third part is a curved surface that bulges away from the second surface.

5. The flexible cover plate according to any one of claims 1-3, wherein, The sidewalls of the groove are wavy, with the crests and troughs of the wave alternating along the direction from the first part to the third part.

6. The flexible cover plate according to claim 5, wherein, In a trough and two adjacent peaks, the distance between the trough and the peaks near the first part along a direction perpendicular to the second surface is a first distance, and the distance between the trough and the peaks near the third part along a direction perpendicular to the second surface is a second distance, wherein the first distance is less than the second distance.

7. The flexible cover plate according to any one of claims 1-3, wherein, The bottom of the groove is provided with at least one groove extending along the first direction, and the organic resin layer fills the groove.

8. The flexible cover plate according to any one of claims 1-7, wherein, The thickness of the first part is greater than or equal to 0.02 mm and less than or equal to 0.07 mm, and / or the thickness of the third part is greater than or equal to 0.06 mm and less than or equal to 0.2 mm.

9. The flexible cover plate according to any one of claims 1-7, wherein, The Young's modulus of the organic resin layer is greater than or equal to 50 MPa and less than or equal to 900 MPa.

10. The flexible cover plate according to any one of claims 1-9, wherein, The flexible cover plate further includes a first adhesive layer located on the side of the organic resin layer away from the glass cover plate, a protective layer located on the side of the first adhesive layer away from the organic resin layer, and a hardened coating located on the side of the protective layer away from the organic resin layer.

11. The flexible cover plate according to claim 10, wherein, The Young's modulus of the organic resin layer is less than that of the protective layer, and / or the Young's modulus of the organic resin layer is greater than that of the first adhesive layer.

12. The flexible cover plate according to claim 10, wherein, The thickness of the third part is greater than the thickness of the protective layer, and / or the thickness of the first part is less than the thickness of the protective layer.

13. A display module, wherein, The display module includes a display panel and a flexible cover plate according to any one of claims 1-12, wherein the flexible cover plate is located on one side of the light-emitting surface of the display panel, and the second surface of the glass cover plate faces the display panel; The display panel includes a foldable display section, two transition display sections located on both sides of the foldable display section, and two flat display sections located on the side of the two transition display sections away from the flat display section; and The first part of the glass cover is located on one side of the foldable display section, the second part of the glass cover is located on one side of the transition display section, and the third part of the glass cover is located on one side of the flat display section.

14. The display module according to claim 13, wherein, The display module includes a folded state and an unfolded state. When the display module is in the folded state, the foldable display part is configured to be bent into a semi-cylindrical shape with R as the bending radius. as well as When the display module is in the unfolded state, the dimension of the first portion along the second direction is greater than πR, and the second direction is perpendicular to the first direction and parallel to the second surface; and / or, The first part completely covers the foldable display section.

15. The display module according to claim 14, wherein, When the display module is in a folded state, the display panel is located on the outside of the flexible cover plate in a folded state; The two flat panel display units are arranged opposite to each other and parallel to each other, and the distance between the two flat panel display units is less than 2R; The transition display section includes a first transition section connected to the foldable display section, a second transition section connected to the side of the first transition section away from the foldable display section, and a third transition section connected between the second transition section and the flat display section; as well as The first transition portion is curved, the second transition portion is flat, the third transition portion is curved, and the second portion of the glass cover plate at least covers the first transition portion.

16. The display module according to claim 15, wherein, The second portion of the glass cover plate covers the first transition portion, the second transition portion, and the third transition portion.

17. The display module according to claim 14, wherein, When the display module is in a folded display mode, the display panel is located inside the folded flexible cover plate; and The second part of the glass cover plate covers the transition display section.

18. A method for manufacturing a display module, wherein, The preparation method includes: A flexible cover plate is formed on one side of the light-emitting surface of the display panel to obtain a display module mother plate. The flexible cover plate includes a glass cover plate located on the display panel and an organic resin layer located on the side of the glass cover plate away from the display panel. The glass cover plate includes a first surface and a second surface disposed opposite to each other, with the second surface facing the display panel. A groove is provided on one side of the first surface of the glass cover plate, recessed towards the second surface, and the groove extends along a first direction. The glass cover plate includes a first side surface connecting the first surface and the second surface. The organic resin layer covers the first surface and the side surface of the glass cover plate. The display module motherboard is edge-cut along the cutting line to remove the portion of the display module motherboard located at the edge. The orthographic projection of the cutting line on the display panel surrounds the orthographic projection of the glass cover plate on the display panel.

19. A display device, wherein, The display device includes a flexible cover plate according to any one of claims 1-12 or a display module according to any one of claims 13-17.

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