Display module and display device

Abstract

The utility model relates to a display module and a display device. The display module comprises a flexible display screen. The flexible display screen comprises a main display screen, a bending connecting part and an auxiliary display screen which are connected in sequence. Wherein the main display screen comprises a first display part, a folding display part and a second display part which are connected in sequence, the first display part is connected between the folding display part and the bending connecting part, the auxiliary display screen is located on the backlight side of the first display part, and the light emitting direction of the auxiliary display screen is opposite to that of the first display part. The main display screen has an unfolded state and a folded state, and in the folded state, the light-emitting face of the first display part and the light-emitting face of the second display part are oppositely arranged. Double-screen display of the foldable display device can be realized by using one flexible display screen.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, specifically to a display module and a display device. Background Technology

[0002] With the development of display technology, foldable display devices have emerged on the market, such as foldable screen devices that can be unfolded or folded. These foldable display devices allow users to switch screen sizes by folding to meet their needs in different scenarios. Specifically, unfolding the foldable screen provides a larger display area for a better user experience, while folding it reduces the screen size for easier portability. Summary of the Invention

[0003] This disclosure aims to solve at least one of the technical problems existing in the prior art, and proposes a display module and a display device.

[0004] To achieve the above objectives, this disclosure provides a display module, including: a flexible display screen, the flexible display screen including a main display screen, a bending connecting portion and a secondary display screen connected in sequence;

[0005] The main display screen includes a first display unit, a folding display unit, and a second display unit connected in sequence. The first display unit is connected between the folding display unit and the bending connection unit. The sub-display screen is located on the backlight side of the first display unit, and the light emission direction of the sub-display screen is opposite to that of the first display unit.

[0006] The main display screen has an unfolded state and a folded state. In the folded state, the light-emitting surface of the first display unit is arranged opposite to the light-emitting surface of the second display unit.

[0007] In some embodiments, the display module further includes: a first protective layer and a first optical adhesive layer stacked sequentially on the light-emitting side of the flexible display screen and along the direction close to the flexible display screen; the first optical adhesive layer covers the flexible display screen and includes a first adhesive portion and a second adhesive portion, the second adhesive portion being located on opposite sides of the first adhesive portion along the width direction of the flexible display screen; the first protective layer covers the first adhesive portion and exposes the second adhesive portion;

[0008] The second adhesive portion includes a first part and a second part, wherein the first part is disposed opposite to the bent connecting part, and the second part is disposed opposite to the folded display part;

[0009] The display module further includes a first adhesive and a second adhesive located on the side of the first optical adhesive layer away from the flexible display screen. At least a portion of the first adhesive is disposed opposite to the bending connection portion and is connected to the first protective layer and the first portion, respectively. At least a portion of the second adhesive is disposed opposite to the folded display portion and is connected to the first protective layer and the second portion, respectively.

[0010] In some embodiments, the display module further includes a second optical adhesive layer and a second protective layer located on the side of the first protective layer away from the flexible display screen and stacked sequentially away from the flexible display screen;

[0011] Both the first adhesive and the second adhesive are also bonded to the second optical adhesive layer.

[0012] In some embodiments, the second protective layer covers the flexible display screen and includes a first protective portion and a second protective portion, the second protective portion being located on opposite sides of the first adhesive portion along the width direction of the flexible display screen; the second optical adhesive layer covers the first protective portion and exposes the second protective portion;

[0013] Both the first adhesive and the second adhesive are also connected to the second protective part.

[0014] In some embodiments, the first adhesive includes a first adhesive portion and a second adhesive portion, the first adhesive portion being connected to the first protective layer and the first optical adhesive layer respectively, and the second adhesive portion being connected to one of the first optical adhesive layer and the second optical adhesive layer as well as the first protective layer.

[0015] The second adhesive includes a third adhesive portion and a fourth adhesive portion. The third adhesive portion is connected to the first protective layer and the first optical adhesive layer, respectively. The fourth adhesive portion is connected to one of the first optical adhesive layer and the second optical adhesive layer, as well as the first protective layer.

[0016] In some embodiments, the display module further includes:

[0017] A support layer is located on the backlight side of the flexible display screen. The support layer includes a first support part, a second support part, and a third support part. The first support part is disposed opposite to the folded display part, the second support part is disposed opposite to the bending connection part, and the third support part supports the sub-display screen, the first display part, and the second display part.

[0018] At the same temperature, the elastic modulus of the third support is greater than that of the first support, and the elastic modulus of the third support is greater than that of the second support.

[0019] In some embodiments, the first support portion includes:

[0020] First supporting sub-section;

[0021] The second support sub-part is located on opposite sides of the first support sub-part in a first direction, the first direction being the direction from the bent display part to the first display part;

[0022] The third support sub-part and the fourth support sub-part are located between the first support sub-part and the second support sub-part, and the fourth support sub-part is located on opposite sides of the third support sub-part in a second direction, which is the extension direction of the bending axis of the bent display part;

[0023] At the same temperature, the elastic modulus of the third support sub-part is greater than that of the second support sub-part, the elastic modulus of the second support sub-part is greater than that of the fourth support sub-part, and the elastic modulus of the fourth support sub-part is greater than that of the first support sub-part.

[0024] In some embodiments, the first support sub-part, the second support sub-part, and the fourth support sub-part are each provided with a plurality of spaced-apart first openings;

[0025] Wherein, the distribution density of the first opening in the first support sub-part is greater than the distribution density of the first opening in the fourth support sub-part, and the distribution density of the first opening in the fourth support sub-part is greater than the distribution density of the first opening in the second support sub-part.

[0026] In some embodiments, along the direction from the first support sub-part to the second support sub-part, the distribution density of the first opening in the fourth support sub-part gradually decreases.

[0027] In some embodiments, the first sub-support portion includes a central region and edge regions located on opposite sides of the central region along the first direction;

[0028] The distribution density of the first opening in the central region is less than that in the edge region.

[0029] In some embodiments, the second support portion has a plurality of spaced second openings, and the distribution density of the second openings in the second support portion is greater than the distribution density of the first openings in the first support sub-part.

[0030] In some embodiments, the flexible display screen includes a flexible display substrate and a touch functional layer located on the light-emitting side of the flexible display substrate. The touch functional layer includes an inorganic insulating layer, a first organic insulating layer, a first touch pattern layer, a second organic insulating layer, a second touch pattern layer, and a third organic insulating layer stacked sequentially along a direction away from the flexible display substrate.

[0031] This disclosure also provides a display device, including a display module as described in any of the above-described embodiments.

[0032] In some embodiments, the display device further includes:

[0033] The camera is located on the backlight side of the first display unit and the orthographic projections of the camera and the sub-display on the first display unit do not overlap, or the camera is located on the backlight side of the second display unit.

[0034] In some embodiments, the display device further includes a drive controller electrically connected to the display module, the drive controller being configured to drive the sub-display to display when the main display screen is in a folded state, and to drive the main display screen to display when the main display screen is in an unfolded state. Attached Figure Description

[0035] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0036] Figure 1 These are schematic diagrams showing the display device in an unfolded state in some embodiments;

[0037] Figure 2 These are schematic diagrams showing the display device in a folded state in some embodiments;

[0038] Figure 3 This is a schematic diagram of the planar structure of the flexible display screen in some embodiments of this disclosure;

[0039] Figure 4 This is a schematic diagram of the structure of the display device in some embodiments of this disclosure;

[0040] Figure 5 This is a schematic diagram of the display device in some other embodiments of this disclosure;

[0041] Figure 6 This is a schematic cross-sectional view of the display module in some embodiments of this disclosure;

[0042] Figure 7 This is a partial cross-sectional structural diagram of the display module in some embodiments of this disclosure;

[0043] Figure 8 This is a schematic diagram of the planar structure of the second optical adhesive layer in some embodiments of this disclosure;

[0044] Figure 9 This is a cross-sectional structural diagram of the display module in some other embodiments of this disclosure;

[0045] Figure 10 This is a schematic diagram of the planar structure of the support layer in some embodiments of this disclosure;

[0046] Figure 11 This is a schematic diagram of the planar structure of the first support portion in some embodiments of this disclosure;

[0047] Figure 12 This is a schematic diagram of the planar structure of the second support portion in some embodiments of this disclosure;

[0048] Figure 13A This is a cross-sectional structural diagram of the touch function layer in an embodiment of this disclosure;

[0049] Figure 13B This is a cross-sectional structural diagram of the touch function layer in other embodiments;

[0050] Figure 13C This is a cross-sectional structural diagram of the touch function layer in some other embodiments;

[0051] Figure 14 This is a schematic diagram of the structure of the display device in some other embodiments of this disclosure. Detailed Implementation

[0052] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0053] 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 scope of protection of this disclosure.

[0054] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0055] As used herein, “parallel” and “perpendicular” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°.

[0056] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0057] This document describes exemplary embodiments with reference to sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and portions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Therefore, exemplary embodiments should not be construed as limited to the shapes of the portions shown herein, but rather include shape deviations due to, for example, manufacturing processes. Thus, the portions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of portions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0058] With the continuous development of display technology, foldable screens have become a future trend in mobile electronic products. Display devices using foldable screens have both folded and unfolded states, allowing for free unfolding and folding, thus enhancing the user experience. To further enhance the user experience, a secondary display is often added to the backlight side of the foldable screen for display when the device is folded. Furthermore, dual-screen displays are increasingly being used in various display devices, such as mobile phones, tablets, and personal digital assistants (PDAs).

[0059] Figure 1 These are schematic diagrams showing the display device in an unfolded state in some embodiments. Specifically, Figure 1 (a), (b), and (c) are schematic diagrams of the display device in its unfolded state from different viewing angles. Figure 2 These are schematic diagrams showing the display device in a folded state in some embodiments. Specifically, Figure 2 (a), (b), and (c) are schematic diagrams of the display device in a folded state from different viewing angles.

[0060] In embodiments of the relevant technology, such as Figure 1 and Figure 2 As shown, the display device includes a main display screen 12, a secondary display screen 11, and a frame 2 located between the main display screen 12 and the secondary display screen 11. The secondary display screen 11 is located on the backlight side of the main display screen 12, and the light-emitting sides of the main display screen 12 and the secondary display screen 11 are arranged opposite to each other. The main display screen 12 has an unfolded state and a folded state. Figure 1 This is a schematic diagram of the display device structure when the main display screen 12 is in its unfolded state. Figure 2 This is a schematic diagram of the display device structure with the main display screen 12 in a folded state. Furthermore, the main display screen 12 can be folded about the folding center axis L0.

[0061] exist Figure 1 and Figure 2 In the illustrated embodiment, the main display screen 12 and the secondary display screen 11 are two independent displays. Using two independent displays requires designing separate drive controllers for each display to drive them, which not only increases the complexity of the overall device design but also raises design costs.

[0062] Furthermore, in related technologies, the main display screen 12 is generally a color screen, while the secondary display screen 11 is generally an e-ink screen, which greatly limits the diversity of content that can be displayed on the secondary display screen 11.

[0063] Meanwhile, since the main display screen 12 and the secondary display screen 11 are two separate displays, the thickness of the main display screen 12 and the secondary display screen 11 in a display device is uncertain, which will also affect the thinness and lightness of the display device to some extent.

[0064] In order to at least alleviate or solve one of the aforementioned technical problems, this disclosure provides a display module and a display device.

[0065] In some embodiments, a display module disclosed herein includes: a flexible display screen 10.

[0066] Figure 3 This is a schematic diagram of the planar structure of the flexible display screen 10 in some embodiments of this disclosure.

[0067] like Figure 3 As shown, the flexible display screen 10 includes a main display screen 12, a bending connection portion 13, and a secondary display screen 11 connected in sequence. It can be understood that the main display screen 12, the bending connection portion 13, and the secondary display screen 11 are connected to form an integrated flexible display screen 10.

[0068] Among them, such as Figure 3 As shown, the main display screen 12 includes a first display unit 121, a folding display unit 123, and a second display unit 122 connected in sequence. The first display unit 121 is connected between the folding display unit 123 and the bending connecting part 13.

[0069] Optionally, such as Figure 3 As shown, the flexible display screen 10 has a main display area P2, a bending connection area P3, and a secondary display area P1. Furthermore, the main display screen 12 is located in the main display area P2, the secondary display screen 11 is located in the secondary display area P1, and the bending connection portion 13 is located in the bending connection area P3.

[0070] The main display area P2 includes a first display area P21, a foldable area P23, and a second display area P22. The first display unit 121 is located in the first display area P21, the foldable display unit 123 is located in the foldable area P23, and the second display unit 122 is located in the second display area P22.

[0071] Figure 4 This is a schematic diagram of the structure of the display device in some embodiments of this disclosure, specifically, Figure 4 (a), (b), and (c) are schematic diagrams of the display device in its unfolded state from different viewing angles. Figure 5 This is a schematic diagram of the display device in some other embodiments of this disclosure, specifically, Figure 5 (a), (b), and (c) are schematic diagrams of the display device in a folded state from different viewing angles.

[0072] like Figure 4 and Figure 5 As shown, the display device includes a flexible display screen 10 and a frame 2 located between a main display screen 12 and a secondary display screen 11. The secondary display screen 11 and the first display unit 121 are located on opposite sides of the frame 2 along its thickness direction. A bending connection portion 13 bends around the frame 2.

[0073] like Figure 4 and Figure 5 As shown, the secondary display screen 11 is located on the backlight side of the first display unit 121, and the light emission direction of the secondary display screen 11 is opposite to that of the first display unit 121. Furthermore, the main display screen 12 has an unfolded state and a folded state. In this case... Figure 4 In the middle, the main display screen 12 is in the unfolded state. Figure 5 In the image, the main display screen 12 is in a folded state. It can be understood that when the main display screen 12 is in an unfolded state, the display device is in an unfolded state; when the main display screen 12 is in a folded state, the display device is in a folded state.

[0074] like Figure 5 As shown, when the main display screen 12 is in a folded state, the light-emitting surface of the first display unit 121 and the light-emitting surface of the second display unit 122 are arranged opposite to each other.

[0075] In this embodiment, the main display screen 12 can increase its display area when unfolded, while the secondary display screen 11 can be displayed when the main display screen 12 is folded. Therefore, this embodiment can achieve dual-screen display. Furthermore, this embodiment utilizes the bendability of the flexible display screen 10, achieving dual-screen display functionality with a single flexible display screen 10. Compared to... Figure 1 and Figure 2 The embodiment shown uses two independent displays to achieve a dual-screen display solution, which can effectively reduce design costs.

[0076] Meanwhile, since the main display screen 12 and the secondary display screen 11 in this embodiment are connected as an integrated flexible display screen 10, that is, both the secondary display screen 11 and the main display screen 12 can be color screens, the ability of the secondary display screen 11 to display color content can be improved when the main display screen 12 is in a folded state and is displayed through the secondary display screen 11.

[0077] Furthermore, since the main display screen 12 and the secondary display screen 11 in this embodiment are connected to form an integrated flexible display screen 10, the thickness of the display device can be accurately controlled by controlling the thickness of the flexible display screen 10, which is beneficial to achieving the thin and light performance of the display device.

[0078] Optionally, the bending radius R1 of the bent connecting portion 13 is 2mm to 4mm. For example, it can be 2mm, 2.5mm, 3mm, 3.5mm, or 4mm. It is understood that the diameter of the bent connecting portion 13 is close to or equal to the thickness of the frame 2. It is understood that, as... Figure 3 As shown, the length L2 of the bent connecting part 13 in the first direction after unfolding is close to or equal to π×R1.

[0079] The first direction refers to the direction from the bending connection 13 to the first display unit 121 after the flexible display screen 10 is fully unfolded. It can be understood that the first direction is also the extension direction of the flexible display screen 10 after it is fully unfolded. The flexible display screen 10 being fully unfolded means that both the bending connection 13 and the folded display unit 123 are unfolded.

[0080] Optionally, the bending radius R2 of the folding display section 123 is 1mm to 2mm. For example, it can be 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2mm. It is understood that, as... Figure 3 As shown, the length L1 of the folding display section 123 in the first direction is approximately equal to or close to π×R2.

[0081] Optionally, such as Figure 4 and Figure 5 As shown, the folding display unit 123 can be folded or unfolded around the first bending axis L0. It should be noted that the first bending axis L0 passes through the center of the circle in which the folding display unit 123 is located when it is folded.

[0082] Similarly, the bent connection 13 can be bent around a second bending axis (not shown in the figure), and the second bending axis passes through the center of the circle in which the bent connection 13 is located.

[0083] Wherein, the extension direction of the first bending shaft L0 and the extension direction of the second bending shaft are the same. In this embodiment of the disclosure, the extension direction of the first bending shaft L0 or the second bending shaft is described as the second direction.

[0084] Optionally, the orthographic projections of the edge of the secondary display screen 11 away from the bending connection 13 and the bending axis L0 of the folding display section 123 onto the main display screen 12 can overlap or be at a certain distance.

[0085] Figure 6 This is a schematic cross-sectional view of the display module in some embodiments of this disclosure.

[0086] In some embodiments, such as Figure 6As shown, the display module also includes: a first optical adhesive layer 20, a first protective layer 30, a second optical adhesive layer 40, and a second protective layer 50, which are located on the light-emitting side of the flexible display screen 10 and are arranged sequentially in a direction away from the flexible display screen 10.

[0087] The first optical adhesive layer 20, the first protective layer 30, the second optical adhesive layer 40, and the second protective layer 50 all at least cover the bending connection portion 13 and the folding display portion 123. Furthermore, at the same temperature, the elastic modulus of the first optical adhesive layer 20 is greater than that of the second optical adhesive layer 40.

[0088] Optionally, the thickness of the first optical adhesive layer 20 is 40µm to 60µm, for example, 40µm, 50µm, or 60µm. The elastic modulus of the first optical adhesive layer 20 at room temperature (20℃) is 50±30kPa, for example, 65kPa, 70kPa, 75kPa, or 80kPa. Simultaneously, it satisfies the following requirements: an elastic modulus at a high temperature of 60℃ is 15±10kPa, for example, 5kPa, 10kPa, or 15kPa; an elastic modulus at a low temperature of -20℃ is 200 to 550kPa; and a TG point < -20℃.

[0089] Compared to the first optical adhesive layer 20 with an elastic modulus of 30±10 kPa at room temperature, the first optical adhesive layer 20 with a higher elastic modulus in this embodiment can reduce the pressure on the flexible display screen 10 by 27% under the same stress. Therefore, this embodiment can enhance the pressure resistance of the display module and improve the folding reliability of the display module.

[0090] Optionally, the thickness of the second optical adhesive layer 40 is 40µm to 60µm, for example, 40µm, 50µm, or 60µm. The elastic modulus of the second optical adhesive layer 40 is 30±10kPa at room temperature, 15±10kPa at a high temperature of 60℃, and 250kPa±100kPa at a low temperature of -20℃, and its Tg point is < -20℃, where Tg point refers to the glass transition temperature (the transition temperature between the glassy state and the elastic state).

[0091] In this embodiment of the present disclosure, the first optical adhesive layer 20, the first protective layer 30, the second optical adhesive layer 40, and the second protective layer 50 all at least cover the bending connection portion 13 and the folded display portion 123. Therefore, the second protective layer 50, the first protective layer 30, the second optical adhesive layer 40, and the first optical adhesive layer 20 can at least protect the side of the bending connection portion 13 and the folded display portion 123 facing the light-emitting side of the flexible display screen 10.

[0092] Furthermore, since the first optical adhesive layer 20 is closer to the flexible display screen 10, and the elastic modulus of the first optical adhesive layer 20 is designed to be greater than that of the second optical adhesive layer 40 at the same temperature, the pressure from the light-emitting side on the flexible display screen 10 can be reduced. At the same time, since both the second optical adhesive layer 40 and the first optical adhesive layer 20 cover the bending connection portion 13 and the folding display portion 123, the folding reliability of the folding display screen at the bending connection portion 13 and the folding display portion 123 can also be improved.

[0093] Optionally, both the second optical adhesive layer 40 and the first optical adhesive layer 20 can be made of OCA adhesive (OpticallyClear Adhesive).

[0094] Optionally, the thickness of both the second protective layer 50 and the first protective layer 30 can be 30um to 100um, for example, 30um, 40um, 50um, 60um, 70um, 80um, 90um or 100um.

[0095] Optionally, the materials of the second protective layer 50 and the first protective layer 30 may include at least one of the following: transparent organic films such as PI (polyimide), PET (polyethylene terephthalate), COP (cyclic olefin polymer), TAC (triacetate cellulose film), and ultra-thin glass (UTG).

[0096] For example, both the second protective layer 50 and the first protective layer 30 are made of PI material, meaning that the light-emitting side of the flexible display screen 10 adopts a double PI protection structure, which can greatly improve the flexibility of the display module and prevent the display module from breaking.

[0097] For example, the second protective layer 50 is an organic thin film, and the first protective layer 30 is an ultra-thin glass. This combination of organic thin film and ultra-thin glass can simultaneously ensure the flexibility and hardness of the display module, and improve the display module's pressure resistance and crack resistance.

[0098] The organic thin film has an elastic modulus of 5 GPa to 7 GPa at room temperature (20℃) and an elongation at break of greater than 2.5%. The thickness of the ultra-thin glass is 20 μm to 50 μm, for example, 20 μm, 30 μm, 40 μm or 50 μm. Ultra-thin glass can be used as an impact-resistant film layer to improve the overall impact resistance and surface smoothness of the display module.

[0099] In other embodiments, such as Figure 6As shown, the first optical adhesive layer 20, the first protective layer 30, the second optical adhesive layer 40, and the second protective layer 50 all cover the sub-display screen 11, the first display unit 121, and the second display unit 122. That is, it can be understood that in this embodiment, the first optical adhesive layer 20, the first protective layer 30, the second optical adhesive layer 40, and the second protective layer 50 all cover the flexible display screen 10.

[0100] The embodiments disclosed herein can protect the light-emitting side of a flexible display panel by sequentially stacking a first optical adhesive layer 20, a first protective layer 30, a second optical adhesive layer 40, and a second protective layer 50.

[0101] Figure 7 This is a partial cross-sectional structural diagram of the display module in some embodiments of this disclosure. Figure 8 This is a schematic diagram of the planar structure of the second optical adhesive layer 40 in some embodiments of this disclosure. Figure 7 It is along Figure 8 A schematic diagram of the cross-sectional structure of the middle cutting line BB', and along... Figure 8 Schematic diagram of the cross-sectional structure of the middle cutting line AA' and Figure 7 Similar or identical.

[0102] In some embodiments, such as Figure 7 and Figure 8 As shown, a first optical adhesive layer 20 covers the flexible display screen 10, and the first optical adhesive layer 20 includes a first adhesive portion 201 and a second adhesive portion 202, wherein the second adhesive portions 202 are located on opposite sides of the first adhesive portion 201 along the width direction of the flexible display screen 10. Furthermore, a first protective layer 30 covers the first adhesive portion 201 and exposes the second adhesive portion 202.

[0103] For example, such as Figure 8 As shown, the width W4 of the first protective layer 30 in the second direction is smaller than the width W3 of the first optical adhesive layer 20 in the second direction. The portion of the first optical adhesive layer 20 directly opposite the first protective layer 30 is the first adhesive portion 201, and the portion of the first optical adhesive layer 20 extending beyond the first protective layer 30 (i.e., the portion not directly opposite the first protective layer 30) includes the second adhesive portion 202. Optionally, the width W3 of the first optical adhesive layer 20 in the second direction can be the same as the width of the flexible display screen 10 in the second direction.

[0104] The second adhesive portion 202 includes a first portion 221 and a second portion 222. The first portion 221 is disposed opposite to the bending connection portion 13, that is, the first portion 221 is located in the bending connection area P3. The second portion 222 is disposed opposite to the foldable display portion 123, that is, the second portion 222 is located in the foldable area P23.

[0105] Optionally, the second adhesive portion 202 may further include a third portion located opposite to the sub-display 13 in the sub-display area P1, a fourth portion located opposite to the first display portion 121 in the first display area P21, and a fifth portion located opposite to the second display portion 122 in the second display area P22.

[0106] like Figure 8 As shown, the display module also includes a first adhesive 7 and a second adhesive 8 located on the side of the first optical adhesive layer 20 away from the flexible display screen 10. At least a portion of the first adhesive 7 is disposed opposite to the bending connection portion 13, that is, at least a portion of the first adhesive 7 is located in the bending connection area P3. At least a portion of the second adhesive 8 is disposed opposite to the foldable display portion 123, that is, at least a portion of the second adhesive 8 is located in the foldable area P23.

[0107] like Figure 7 As shown, the first adhesive 7 is connected to the first protective layer 30 and the first portion 221, respectively. Specifically, the first adhesive 7 is connected to the side surface of the first protective layer 30 and the surface of the first portion 221 away from the flexible display screen 10, respectively. Similarly, the second adhesive 8 is connected to the first protective layer 30 and the second portion 222, respectively.

[0108] It is understandable that, such as Figure 8 As shown, the length L4 of the first adhesive 7 in the first direction is greater than the length L2 of the bent connecting portion 13 or the bent connecting area P3 in the first direction. The length L3 of the second adhesive 8 in the first direction is greater than the length L1 of the foldable display portion 123 or the foldable area P23 in the first direction.

[0109] This embodiment of the present disclosure provides a first adhesive 7 corresponding to the bending connection portion 13 and a second adhesive 8 corresponding to the foldable display portion 123, and makes the first adhesive 7 and the second adhesive 8 respectively connected to the first protective layer 30 and the first optical adhesive layer 20. This can increase the folding reliability of the display module in the bending connection area P3 and the foldable area P23, and can avoid the display performance of the foldable display portion 123 being affected by multiple folding and unfolding in the foldable area P23.

[0110] Optionally, the first adhesive 7 may include at least one of bank adhesive or OCR adhesive (Optical Clear Resin).

[0111] Optionally, the second adhesive 8 may include at least one of bank adhesive or OCR adhesive.

[0112] Figure 9 This is a cross-sectional structural diagram of the display module in some other embodiments of this disclosure.

[0113] In some embodiments, such as Figure 7 and Figure 9 As shown, the first adhesive 7 is also connected to the second optical adhesive layer 40. Similarly, the second adhesive 8 (not shown in the figure) is also connected to the second optical adhesive layer 40. The specific connection relationship between the second adhesive 8 and the second optical adhesive layer 40 is similar to or the same as the connection relationship between the first adhesive 7 and the second optical adhesive layer 40, and can be referred to... Figure 7 and Figure 9 understand.

[0114] In this embodiment, both the first adhesive 7 and the second adhesive 8 are connected to the second optical adhesive layer 40, which can further increase the folding reliability of the display module in the bending connection area P3 and the foldable area P23.

[0115] In some embodiments, such as Figure 7 As shown, the second optical adhesive layer 40 covers the flexible display screen, and the first adhesive 7 is also bonded to the surface of the second optical adhesive layer 40 near the flexible display screen 10. Similarly, the second adhesive 8 is also bonded to the surface of the second optical adhesive layer 40 near the flexible display screen 10.

[0116] In other embodiments, such as Figure 9 As shown, the second optical adhesive layer 40 covers a portion of the flexible display screen 10. In this case, the second protective layer 50 covers the flexible display screen 10 and includes a first protective portion 501 and a second protective portion 502, with the second protective portion 502 located on opposite sides of the first protective portion 501 along the width direction (second direction) of the flexible display screen 10. The second optical adhesive layer 40 covers the first protective portion 501 and exposes the second protective portion 502. Further, the second protective portion 502 includes a third portion 521 and a fourth portion (not shown in the figure), with the third portion 521 located in the bending connection region P3 and the fourth portion located in the foldable region P23.

[0117] The first adhesive 7 and the second adhesive 8 are both connected to the second protective part 502.

[0118] Specifically, such as Figure 9 As shown, the first adhesive 7 is connected to the surface of the third part 521 near the flexible display screen 10, the side of the second optical adhesive layer 40, the side of the first protective layer 30, and the surface of the first optical adhesive layer 20 away from the flexible display screen.

[0119] Similarly, the second adhesive 8 is bonded to the surface of the fourth part near the flexible display screen 10, the side of the second optical adhesive layer 40, the side of the first protective layer 30, and the surface of the first optical adhesive layer 20 away from the flexible display screen.

[0120] It is understandable that the planar structural size relationship between the second protective layer 50 and the second optical adhesive layer 40 is related to... Figure 8 The planar structure relationship between the first protective layer 30 and the first optical adhesive layer 20 is similar or the same.

[0121] In this embodiment of the present disclosure, by providing a first adhesive 7 in the bending connection area P3 to connect with the second protective part, the second optical adhesive layer 40, the first protective layer 30, and the first optical adhesive layer 20, and by providing a second adhesive 8 in the foldable area P23 to connect with the second protective part, the second optical adhesive layer 40, the first protective layer 30, and the first optical adhesive layer 20, the protection of the light-emitting side of the flexible display screen 10 can be improved, while ensuring the bending reliability of the display module in the bending connection area P3 and the foldable area P23.

[0122] In some embodiments, such as Figure 7 As shown, the first adhesive 7 includes a first adhesive portion 71 and a second adhesive portion 72. The first adhesive portion 71 is connected to the first protective layer 30 and the first optical adhesive layer 20, respectively. The second adhesive portion 72 is located between the first protective layer 30 and the first optical adhesive layer 20, and is connected to both the first protective layer 30 and the first optical adhesive layer 20. Alternatively, similarly, the second adhesive portion 72 is located between the first protective layer 30 and the second optical adhesive layer 40, and is connected to both the first protective layer 30 and the second optical adhesive layer 40.

[0123] Second adhesive 8 and Figure 7 The structure of the first adhesive 7 is similar. The second adhesive 8 includes a third adhesive portion and a fourth adhesive portion. The third adhesive portion is connected to the first protective layer 30 and the first optical adhesive layer 20, respectively. The fourth adhesive portion is located between the first protective layer 30 and the first optical adhesive layer 20 and is connected to both the first protective layer 30 and the first optical adhesive layer 20, respectively. Alternatively, the fourth adhesive portion is located between the first protective layer 30 and the second optical adhesive layer 40 and is connected to both the first protective layer 30 and the second optical adhesive layer 40, respectively.

[0124] Optionally, such as Figure 7 As shown, the width W1 of the first sub-adhesive portion 71 in the second direction is 0.5mm to 1.1mm, for example, it can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm or 1.1mm.

[0125] Optionally, such as Figure 7 As shown, the thickness H of the second sub-adhesive portion 72 in the thickness direction of the display module is 0 to 40 μm.

[0126] Optionally, such as Figure 7As shown, the width W2 of the orthographic projection of the second sub-adhesive portion 72 and the first protective layer 30 onto the flexible display screen 10 in the second direction is 20µm to 450µm. It can be understood that the second sub-adhesive portion 72 overlaps the surface of the first protective layer 30 near or away from the flexible display screen 10, and the overlap amount in the second direction is W2.

[0127] Optionally, such as Figure 8 As shown, the length L4 of the first adhesive 7 in the first direction is 14.5mm to 15.5mm.

[0128] Optionally, the width of the third sub-adhesive portion in the second direction is 0.5 mm to 1.1 mm, for example, it can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm or 1.1 mm.

[0129] Optionally, the thickness of the fourth sub-adhesive portion in the thickness direction of the display module is 0 to 40 μm.

[0130] Optionally, the width of the fourth sub-adhesive portion and the first protective layer 30 projected onto the flexible display screen 10 in the second direction is 20µm to 450µm. It is understood that the fourth sub-adhesive portion overlaps the surface of the first protective layer 30 near or away from the flexible display screen 10, and the overlap amount in the second direction is 20µm to 450µm.

[0131] Optionally, such as Figure 8 As shown, the length L3 of the second adhesive 8 in the second direction is 19mm to 20mm.

[0132] Optionally, such as Figure 9 As shown, the first protective layer 30 can be made thinner at the edge of the bending connection area P3, that is, the first protective layer 30 is made thinner near the first adhesive 7, thereby further enabling the first adhesive 7 to connect with the second optical adhesive layer 40 near the surface of the flexible display screen 10. And / or, similarly, the first protective layer 30 can be made thinner at the edge of the foldable area P23, that is, the first protective layer 30 is made thinner near the second adhesive 8, thereby further enabling the second adhesive 8 to connect with the second optical adhesive layer 40 near the surface of the flexible display screen 10.

[0133] In some embodiments, such as Figure 9 As shown, the second protective layer 50 includes an organic layer 51 and a buffer layer 52 sequentially disposed along the direction away from the flexible display screen 10, that is, the buffer layer 52 is located on the side of the organic layer 51 away from the flexible display screen 10. The hardness of the first protective layer 30 is greater than or equal to that of the organic layer 51. For example, the hardness of the first protective layer 30 is greater than that of the organic layer 51.

[0134] In this embodiment, the second protective layer 50 and the first protective layer 30 form a front protective structure for the light-emitting side of the flexible display screen 10. Specifically, an organic layer 51 is provided in the second protective layer 50 to ensure high resilience of the front protective structure. Furthermore, a buffer layer 52 is provided on the side of the organic layer 51 away from the flexible display screen 10 to improve the scratch and impact resistance of the front protective structure. Simultaneously, the first protective layer 30 has a higher hardness than the organic layer 51, which increases the hardness of the front protective structure. Therefore, the front protective structure can minimize damage to the light-emitting side of the flexible display screen 10 due to pressure.

[0135] Optionally, the buffer layer 52 may be an HC coating. The HC coating can improve the scratch resistance of the front protective structure. Optionally, the thickness of the HC coating needs to be less than 5 μm, for example, it can be 4 μm, 4.2 μm, 4.4 μm, 4.5 μm, 4.6 μm or 4.8 μm, with an elongation at break greater than 2.5%.

[0136] Optionally, the organic layer 51 may include at least one of PI, PET, COP and TAC.

[0137] Optionally, such as Figure 9 As shown, the display module also includes a fourth optical adhesive layer 4 and a first protective layer 5, which are located on the side of the second protective layer 50 away from the flexible display screen 10 and are sequentially disposed in the direction away from the flexible display screen 10, to further protect the light-emitting side of the flexible display screen 10. Optionally, the material of the fourth optical adhesive layer 4 can be OCA adhesive.

[0138] In some embodiments, such as Figure 6 As shown, the display module also includes a support layer 60 located on the backlight side of the flexible display screen 10. Figure 10 This is a schematic diagram of the planar structure of the support layer 60 in some embodiments of this disclosure. For example... Figure 6 and Figure 10 As shown, the support layer 60 includes a first support portion 61, a second support portion 62, and a third support portion 63.

[0139] The first support portion 61 is disposed opposite to the foldable display portion 123, the second support portion 62 is disposed opposite to the bending connection portion 13, and the third support portion 63 supports the sub-display screen 11, the first display portion 121, and the second display portion 122. That is, the first support portion 61 is located in the foldable area P23, the second support portion 62 is located in the bending connection area P3, and the third support portion 63 covers the sub-display area P2, the first display area P21, and the second display area P22.

[0140] At the same temperature, the elastic modulus of the third support part 63 is greater than that of the first support part 61, and the elastic modulus of the third support part 63 is greater than that of the second support part 62.

[0141] In this embodiment, the elastic modulus of the third support portion 63 is greater than that of the first support portion 61, and the elastic modulus of the third support portion 63 is greater than that of the second support portion 62. This ensures that the third support portion 63 supports the sub-display screen 11, the first display portion 121, and the second display portion 122. At the same time, it also ensures the bendability of the second support portion 62 and the first support portion 61, preventing them from breaking when bending.

[0142] Optionally, the material of the support layer 60 may include at least one of stainless steel, titanium alloy, carbon fiber, or graphene.

[0143] It is understandable that when the first support part 61, the second support part 62 and the third support part 63 are made of the same material, the third support part 63 can be made of a complete layer of material, while the first support part 61 and the second support part 62 can be made of patterned design, such as openings, to meet the corresponding elastic modulus requirements.

[0144] Optionally, such as Figure 6 As shown, the third support portion 63 includes a first sub-support portion 631, a second sub-support portion 632, and a third sub-support portion 633. The first sub-support portion 631 is disposed opposite to the secondary display screen 11, i.e., located in the secondary display area P2. The second sub-support portion 632 is disposed opposite to the first display portion 121, i.e., located in the first display area P21. The third sub-support portion 633 is disposed opposite to the second display portion 122, i.e., located in the second display area P22.

[0145] Optionally, the display module further includes: pressure-sensitive adhesive 90 (PSA), back protective film 80 and third optical adhesive layer 70, which are stacked sequentially between the flexible display screen 10 and the support layer 60 and in a direction away from the flexible display screen 10.

[0146] Optionally, pressure-sensitive adhesive 90, back protective film 80, and third optical adhesive layer 70 cover the flexible display screen 10.

[0147] Optionally, the material of the third optical adhesive layer 70 can be OCA adhesive.

[0148] Optionally, the material of the back protective film 80 may include at least one of PI and PET, with a thickness of 40µm to 60µm, for example, 40µm, 50µm, or 60µm. Furthermore, the elastic modulus of the back protective film 80 at room temperature is 2GPa to 4GPa.

[0149] Optionally, the thickness of the pressure-sensitive adhesive 90 is 10µm to 30µm, for example, 10µm, 20µm, or 30µm. Furthermore, the elastic modulus of the pressure-sensitive adhesive 90 is less than 200±100kPa at -20℃, 30±10kPa at room temperature, and 15±10kPa at 60℃, with a TG point < -20℃.

[0150] Optionally, the third optical adhesive layer 70 is an adhesive material used to bond the back protective film 80 and the support layer 60. The third optical adhesive layer 70 has an elastic modulus of 30±10 kPa at room temperature, 15±10 kPa at 60°C, and 200±100 kPa at -20°C, with a Tg point < -20°C. The thickness of the third optical adhesive layer 70 is 10 μm to 30 μm, for example, 10 μm, 20 μm, or 30 μm.

[0151] In this embodiment of the disclosure, by setting the thickness and elastic modulus of each film layer structure, the flatness of the display module when it returns to a flat state from a bent state can be guaranteed. Furthermore, during folding, the bending stress can be concentrated on the organic film layer, so as not to cause the display module to break, thereby ensuring the quality of the display module.

[0152] Optionally, the display module also includes an assembly 6 located on the side of the support layer 60 away from the flexible display screen 10, the assembly 6 being used for assembly and connection with the frame 2.

[0153] Figure 11 This is a schematic planar view of the first support portion 61 in some embodiments of this disclosure. Specifically, Figure 11 yes Figure 10 The detailed planar structure of the part enclosed by the dashed box c.

[0154] In some embodiments, such as Figure 11 As shown, the first support portion 61 includes: a first support sub-portion 611, a second support sub-portion 612, a third support sub-portion 613, and a fourth support sub-portion 614.

[0155] The second support sub-part 612 is located on opposite sides of the first support sub-part 611 in the first direction.

[0156] The third support sub-part 613 and the fourth support sub-part 614 are located between the first support sub-part 611 and the second support sub-part 612, and the fourth support sub-part 614 is located on opposite sides of the third support sub-part 613 in the first direction.

[0157] At the same temperature, the elastic modulus of the third support sub-part 613 is greater than that of the second support sub-part 612, the elastic modulus of the second support sub-part 612 is greater than that of the fourth support sub-part 614, and the elastic modulus of the fourth support sub-part 614 is greater than that of the first support sub-part 611.

[0158] In this embodiment, at the same temperature, the first support sub-part 611 has the smallest elastic modulus, which ensures the foldability of the first support sub-part 611. Secondly, the third support sub-part 613 has the smallest elastic modulus, which ensures the robustness of the entire foldable display part 123. The fourth support sub-part 614 located on opposite sides of the third support sub-part 613 in the first direction serves as a transition between the first support sub-part 611 and the second support sub-part 612, avoiding the elastic modulus being too large and difficult to deform, which could lead to breakage during folding, or avoiding an area with an excessively small elastic modulus, which could hinder the overall unfolding of the main display screen 12.

[0159] In some embodiments, such as Figure 6 As shown, the first support portion 61 has multiple first openings a. Specifically, as... Figure 11 As shown, the first support sub-part 611, the second support sub-part 612 and the fourth support sub-part 614 are each provided with a plurality of spaced first openings a.

[0160] The distribution density of the first opening a in the first support sub-part 611 is greater than that in the fourth support sub-part 614, and the distribution density of the first opening a in the fourth support sub-part 614 is greater than that in the second support sub-part 612.

[0161] The embodiments disclosed herein can adjust the elastic modulus of the first support sub-part 611, the second support sub-part 612, and the fourth support sub-part 614 by adjusting the distribution density of the first opening a.

[0162] It should be noted that if the first support sub-part 611, the second support sub-part 612, the third support sub-part 613, and the fourth support sub-part 614 are made of the same material, it can be understood that the material of the third support sub-part 613 does not have the first opening a. In this case, the elastic modulus of the third support sub-part 613 is a constant value. However, if the first support sub-part 611, the second support sub-part 612, and the fourth support sub-part 614 are made of the same material as the third support sub-part 613, but have the first opening a, the first opening a can change the elastic modulus of the material. In this case, the elastic modulus of the first support sub-part 611, the second support sub-part 612, and the fourth support sub-part 614 can be understood as equivalent moduli.

[0163] In some embodiments, such as Figure 11As shown, along the direction from the first support sub-part 611 to the second support sub-part 612, the distribution density of the first opening a in the fourth support sub-part 614 gradually decreases. That is, along the direction from the first support sub-part 611 to the second support sub-part 612, the elastic modulus of the fourth support sub-part 614 gradually increases.

[0164] In this embodiment of the present disclosure, along the direction from the first support sub-part 611 to the second support sub-part 612, the elastic modulus of the fourth support sub-part 614 gradually increases, thereby enabling the fourth support sub-part 614 to act as a transition between the first support sub-part 611 and the second support sub-part 612.

[0165] In some embodiments, such as Figure 11 As shown, the first support sub-part 611 includes a central region 601 and edge regions 602 located on opposite sides of the central region 601 in a first direction.

[0166] Specifically, the distribution density of the first opening a in the first sub-support portion 601 is less than the distribution density of the first opening a in the edge region 602. This means that the elastic modulus of the first support portion 611 in the central region 601 is greater than the elastic modulus of the first support portion 611 in the edge region 602.

[0167] In this embodiment, the central region 601 is located between the two edge regions 602. The first support sub-part 611 has a smaller elastic modulus in the edge region 602, which ensures the folding reliability of the first support sub-part 611 in the edge region 602. The first support sub-part 611 has a larger elastic modulus in the central region 601, which ensures the robustness and flatness of the folded display part 123 and prevents breakage.

[0168] Figure 12 This is a schematic planar view of the second support portion 62 in some embodiments of this disclosure. Specifically, Figure 12 yes Figure 10 A schematic diagram of the specific planar structure of the part enclosed by the dashed box d.

[0169] In some embodiments, such as Figure 6 and Figure 12 As shown, the second support portion 62 has multiple spaced-apart second openings b. Combined with... Figure 11 and Figure 12 As shown, the distribution density of the second opening b in the second support portion 62 is greater than the distribution density of the first opening a in the first support sub-portion 611. That is, the elastic modulus of the second support portion 62 is less than the elastic modulus of the first support portion 61.

[0170] In this embodiment, the second support portion 62 is used to support the bent connection portion 13 and bends simultaneously with the bent connection portion 13. In the actual application of the display device, the bent connection portion 13 is always in a bent state. Therefore, the second support portion 62 has a smaller elastic modulus, which can ensure its own bending reliability.

[0171] In one example, the first support sub-part 611 has an equivalent modulus of 50MPa to 300MPa in the first display area P21, the first support sub-part 611 has an equivalent modulus of 20MPa to 80MPa in the second display area P22, the third support sub-part 613 has an elastic modulus of 1GPa to 3GPa, the second support sub-part 612 has an equivalent modulus of 1GPa to 3GPa, and the second support part 62 has an equivalent modulus of 100MPa to 500MPa.

[0172] Figure 13A This is a cross-sectional structural diagram of the touch function layer 102 in an embodiment of this disclosure.

[0173] In some embodiments, such as Figure 13A As shown, the flexible display screen 10 includes a flexible display substrate 101 and a touch function layer 102 located on the light-emitting side of the flexible display substrate 101.

[0174] The touch function layer 102 includes a first inorganic insulating layer 121, a first organic insulating layer 122, a first touch pattern layer 123, a second organic insulating layer 124, a second touch pattern layer 125 and a third organic insulating layer 126, which are stacked sequentially along the direction away from the flexible display substrate 101.

[0175] Optionally, the first touch pattern layer 123 includes a touch driving electrode, and the second touch pattern layer 125 includes a touch sensing electrode, with the touch driving electrode and the touch sensing electrode forming a touch capacitor. The touch function of the display module can be realized by driving the touch driving electrode and the touch sensing electrode.

[0176] In this embodiment, the touch functional layer 102 is designed with a first inorganic insulating layer 121, a first organic insulating layer 122, a first touch pattern layer 123, a second organic insulating layer 124, a second touch pattern layer 125 and a third organic insulating layer 126 stacked sequentially, which can improve the compressive strength and fracture resistance of the touch functional layer 102.

[0177] Optionally, the material of the first inorganic insulating layer 121 may include silicon nitride.

[0178] Specifically, Figure 13B This is a cross-sectional structural diagram of the touch function layer 102 in other embodiments. Figure 13C This is a cross-sectional structural diagram of the touch function layer 102 in some other embodiments.

[0179] exist Figure 13B In the process, the touch functional layer 102 includes a first inorganic insulating layer 121, a first touch pattern layer 123, a second inorganic insulating layer 127, a second touch pattern layer 125, and a third inorganic insulating layer 128, which are sequentially stacked along a direction away from the flexible display substrate 101. Optionally, the materials of the second inorganic insulating layer 127 and the third inorganic insulating layer 128 may include silicon nitride.

[0180] exist Figure 13C In the process, the touch function layer 102 includes a first inorganic insulating layer 121, a first touch pattern layer 123, a second inorganic insulating layer 127, a second touch pattern layer 125 and a fourth organic insulating layer 129, which are stacked sequentially along the direction away from the flexible display substrate 101.

[0181] Compared to Figure 13B and Figure 13C Flexible display screen 10, Figure 13A The failure deformation threshold of the flexible display screen 10 under stress has been greatly improved. The failure deformation threshold refers to the degree of deformation that occurs when the flexible display screen 10 or the touch function layer 102 breaks and fails.

[0182] In this embodiment, an organic insulating layer is provided between the first touch pattern layer 123 and the second touch pattern layer 125, on the side of the first touch pattern layer 123 away from the second touch pattern layer 125, and on the side of the second touch pattern layer 125 away from the first touch pattern layer 123. This can greatly improve the compressive strength of the flexible display screen 10 or the touch functional layer 102 and prevent the flexible display screen 10 or the touch functional layer 102 from cracking.

[0183] Optionally, the materials of the first organic insulating layer 122, the second organic insulating layer 124, and the third organic insulating layer 126 can all be resins or the like.

[0184] In some embodiments, a display device provided in this disclosure includes a display module as described in any of this disclosure.

[0185] Figure 14 This is a schematic diagram of the display device in some other embodiments of this disclosure. Furthermore, Figure 14 This is a schematic diagram of the display device in an unfolded state in some other embodiments of this disclosure.

[0186] In some embodiments, such as Figure 3 , Figure 4 and Figure 14 As shown, the display device also includes: camera 3.

[0187] Among them, such as Figure 3 and Figure 4As shown, the camera 3 is located on the backlight side of the first display unit 121, and the orthographic projections of the camera 3 and the sub-display 11 on the first display unit 121 do not overlap.

[0188] Or, such as Figure 14 As shown, camera 3 is located on the backlight side of the second display unit 122.

[0189] Optionally, the orthographic projection of the camera 3 onto the main display screen 12 can be a polygon, such as a square, a circle, or other shapes. This embodiment of the present disclosure does not limit this.

[0190] In some embodiments, the display device further includes a drive controller electrically connected to the display module, the drive controller being configured to drive the sub-display screen 11 to display when the main display screen 12 is in a folded state, and to drive the main display screen 12 to display when the main display screen 12 is in an unfolded state.

[0191] This embodiment of the disclosure designs a drive controller that can simultaneously control the main display screen 12 and the secondary display screen 11.

[0192] Optionally, the frame 2 and the flexible display screen 10 form a receiving space. The drive controller is located within the receiving space.

[0193] The display device in this disclosure can include any device or product with display functionality. For example, the display device in this disclosure can 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.

[0194] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A display module, characterized by The display module comprises: a flexible display screen comprising a main display screen, a bending connecting part and a sub-display screen connected in sequence; wherein the main display screen comprises a first display part, a folding display part and a second display part connected in sequence, the first display part is connected between the folding display part and the bending connecting part, the sub-display screen is located on the backlight side of the first display part, and the light emitting direction of the sub-display screen is opposite to that of the first display part; the main display screen has an unfolded state and a folded state, in the folded state, the light emitting surface of the first display part is arranged opposite to the light emitting surface of the second display part.

2. The display module of claim 1, wherein, The display module further comprises: a first protective layer and a first optical adhesive layer which are arranged in sequence and stacked along the direction close to the flexible display screen on the light emitting side of the flexible display screen; the first optical adhesive layer covers the flexible display screen and comprises a first bonding part and a second bonding part, the second bonding part is located on the opposite sides of the first bonding part along the width direction of the flexible display screen; the first protective layer covers the first bonding part and exposes the second bonding part; the second bonding part comprises a first part and a second part, the first part is arranged opposite to the bending connecting part, and the second part is arranged opposite to the folding display part; the display module further comprises a first bonding adhesive and a second bonding adhesive on the side of the first optical adhesive layer away from the flexible display screen, at least part of the first bonding adhesive is arranged opposite to the bending connecting part and connected with the first protective layer and the first part respectively, at least part of the second bonding adhesive is arranged opposite to the folding display part and connected with the first protective layer and the second part respectively.

3. The display module of claim 2, wherein, The display module further comprises a second optical adhesive layer and a second protective layer which are arranged in sequence and stacked along the direction away from the flexible display screen on the side of the first protective layer away from the flexible display screen; the first bonding adhesive and the second bonding adhesive are further connected with the second optical adhesive layer.

4. The display module of claim 3, wherein, The second protective layer covers the flexible display screen and comprises a first protective part and a second protective part, the second protective part is located on the opposite sides of the first bonding part along the width direction of the flexible display screen; the second optical adhesive layer covers the first protective part and exposes the second protective part; the first bonding adhesive and the second bonding adhesive are further connected with the second protective part.

5. The display module of claim 3, wherein, The first bonding adhesive comprises a first bonding sub-part and a second bonding sub-part, the first bonding sub-part is connected with the first protective layer and the first optical adhesive layer respectively, and the second bonding sub-part is connected with one of the first optical adhesive layer and the second optical adhesive layer and the first protective layer; the second bonding adhesive comprises a third bonding sub-part and a fourth bonding sub-part, the third bonding sub-part is connected with the first protective layer and the first optical adhesive layer respectively, and the fourth bonding sub-part is connected with one of the first optical adhesive layer and the second optical adhesive layer and the first protective layer.

6. The display module of claim 1, wherein, The display module further comprises: A support layer is located at the backlight side of the flexible display screen, and the support layer comprises a first support part, a second support part and a third support part, the first support part is arranged opposite to the folding display part, the second support part is arranged opposite to the bending connection part, and the third support part supports the auxiliary display screen, the first display part and the second display part. The elastic modulus of the third support part is greater than the elastic modulus of the first support part and the elastic modulus of the second support part at the same temperature.

7. The display module of claim 6, wherein, The first support part comprises: A first support subpart; A second support subpart, which is located on the opposite sides of the first support subpart in a first direction, the first direction being a direction from the bending display part to the first display part; A third support subpart and a fourth support subpart, which are located between the first support subpart and the second support subpart, and the fourth support subpart is located on the opposite sides of the third support subpart in a second direction, the second direction being an extension direction of the bending axis of the bending display part; The elastic modulus of the third support subpart is greater than the elastic modulus of the second support subpart, the elastic modulus of the second support subpart is greater than the elastic modulus of the fourth support subpart, and the elastic modulus of the fourth support subpart is greater than the elastic modulus of the first support subpart at the same temperature.

8. The display module of claim 7, wherein, The first support subpart, the second support subpart and the fourth support subpart are each provided with a plurality of first openings arranged at intervals; The distribution density of the first openings in the first support subpart is greater than the distribution density of the first openings in the fourth support subpart, and the distribution density of the first openings in the fourth support subpart is greater than the distribution density of the first openings in the second support subpart.

9. The display module of claim 8, wherein, In the direction from the first support subpart to the second support subpart, the distribution density of the first openings in the fourth support subpart gradually decreases.

10. The display module of claim 8, wherein, The first sub-support part comprises a middle region and edge regions located on the opposite sides of the middle region in the first direction; The distribution density of the first openings in the middle region is less than the distribution density of the first openings in the edge regions.

11. The display module of claim 8, wherein, The second support part is provided with a plurality of second openings arranged at intervals, and the distribution density of the second openings in the second support part is greater than the distribution density of the first openings in the first support subpart.

12. The display module of any one of claims 1-11, wherein, The flexible display screen comprises a flexible display substrate and a touch function layer located at the light-emitting side of the flexible display substrate, and the touch function layer comprises, in sequence from the direction away from the flexible display substrate, an inorganic insulating layer, a first organic insulating layer, a first touch pattern layer, a second organic insulating layer, a second touch pattern layer and a third organic insulating layer.

13. A display device comprising: The display module comprises any one of the display modules as claimed in claims 1 to 12.

14. The display device of claim 13, wherein, The display device further comprises: A camera is located at the backlight side of the first display part, and the camera and the secondary display screen have no overlapping in orthographic projection on the first display part, or the camera is located at the backlight side of the second display part.

15. The display device of claim 13, wherein, The display device further comprises a driving controller electrically connected with the display module, and the driving controller is configured to drive the secondary display screen to display when the primary display screen is in the folded state, and drive the primary display screen to display when the primary display screen is in the unfolded state.

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