Display module and display device

Abstract

The application relates to a display module and a display device. The display module comprises a flexible display panel, a deformation sensing layer, a stiffness adjusting layer and a control module. The deformation sensing layer and the stiffness adjusting layer are stacked on one side of the flexible display panel, and the control module is electrically connected with the deformation sensing layer and the stiffness adjusting layer. The control module is configured to, when the flexible display panel deforms, control the elastic modulus of the part of the stiffness adjusting layer corresponding to the deformation sensing layer that deforms to be smaller than the elastic modulus of the part of the stiffness adjusting layer corresponding to the deformation sensing layer that does not deform according to the electric signal generated by the deformation of the deformation sensing layer. The display module can solve the problem of unevenness of the flexible screen with the sliding function.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display module and a display device. Background Technology

[0002] Flexible display panels, with their ability to fold, roll, and slide, offer significant advantages in terms of interior design and spatial arrangement. However, currently available flexible screens with sliding capabilities generally suffer from unevenness. Summary of the Invention

[0003] Therefore, it is necessary to provide a display module and display device to address the issue of unevenness in flexible screens with sliding functions.

[0004] According to one aspect of this application, a display module is provided, comprising: a flexible display panel; a deformation sensing layer and a stiffness adjustment layer, wherein the deformation sensing layer and the stiffness adjustment layer are stacked on one side of the flexible display panel; and a control module electrically connected to the deformation sensing layer and the stiffness adjustment layer; wherein the control module is configured to, when the flexible display panel deforms, control the elastic modulus of the stiffness adjustment layer corresponding to the deformed portion of the deformation sensing layer to be less than the elastic modulus of the stiffness adjustment layer corresponding to the undeformed portion of the deformation sensing layer, based on the electrical signal generated by the deformation of the deformation sensing layer.

[0005] In some embodiments, the display module has a bent state; the flexible display panel has a bent portion and a straight portion in the bent state; in the bent state, the control module is configured to control the elastic modulus of the portion of the stiffness adjustment layer corresponding to the bent portion to be less than the elastic modulus of the portion of the stiffness adjustment layer corresponding to the straight portion.

[0006] In some embodiments, the display module further has an unfolded state, in which the control module is configured to control the elastic modulus of the stiffness adjustment layer to reach a preset threshold; the preset threshold is greater than or equal to the elastic modulus of the portion of the stiffness adjustment layer corresponding to the straight section.

[0007] In some embodiments, the stiffness adjustment layer includes: a magnetorheological layer; and a magnetic induction layer electrically connected to the control module, wherein the magnetic induction layer is configured to adjust the magnetic field strength of the environment in which the deformation sensing layer corresponds to the deformed portion of the magnetorheological layer is located, so as to change the elastic modulus of the corresponding portion of the magnetorheological layer.

[0008] Optionally, the magnetorheological layer comprises a magnetorheological adhesive.

[0009] In some embodiments, the magnetic sensing layer includes: an electrode thin film layer located on the side of the stiffness adjustment layer closer to the flexible display panel; an electromagnetic thin film layer located on the side of the electrode thin film layer away from the flexible display panel; and a magnetorheological layer located between the electrode thin film layer and the electromagnetic thin film layer; wherein the control module is configured to control and adjust the magnetic field strength generated by the electromagnetic thin film layer according to the voltage change of the electrode thin film layer, thereby adjusting the elastic modulus of the magnetorheological layer corresponding to the portion of the deformation sensing layer that has undergone deformation.

[0010] Optionally, the deformation sensing layer is disposed between the magnetorheological layer and the electrode thin film layer, and the electromagnetic thin film layer is disposed on the side of the magnetorheological layer opposite to the deformation sensing layer and is electrically connected to the control module.

[0011] In some embodiments, the electrode thin film layer includes a first electrode thin film and a second electrode thin film disposed opposite to each other, the first electrode thin film and the second electrode thin film forming a parallel plate capacitor, the first electrode thin film being located on the side of the electrode thin film layer closer to the deformation sensing layer, and the second electrode thin film being located on the side of the electrode thin film layer closer to the flexible display panel.

[0012] In some embodiments, the electrode thin film layer includes a minimum monitoring voltage change unit with a preset voltage change threshold. When the voltage change of the electrode thin film layer reaches the preset voltage change threshold, the control module controls and adjusts the magnetic field strength generated by the electromagnetic thin film layer according to the voltage change of the electrode thin film layer.

[0013] In some embodiments, the deformation sensing layer comprises a polyvinylidene fluoride (PVDF) film.

[0014] In some embodiments, the display module further includes a support film disposed on one side of the flexible display panel; the deformation sensing layer and the stiffness adjustment layer are disposed on the side of the support film opposite to the flexible display panel.

[0015] According to another aspect of this application, a display device is also provided, which includes a display module as described above.

[0016] The display module provided in this application stacks a stiffness adjustment layer and a deformation sensing layer on one side of a flexible display panel, and provides a control module electrically connected to the stiffness adjustment layer and the deformation sensing layer. The control module is configured to, when the flexible display panel deforms, control the elastic modulus of the part of the flexible display panel corresponding to the stiffness adjustment layer to be less than the elastic modulus of the part of the flexible display panel corresponding to the stiffness adjustment layer that has not deformed, based on the electrical signal generated by the deformation of the deformation sensing layer. This allows the area of ​​the flexible display panel corresponding to the stiffness adjustment layer to exhibit flexibility when the flexible display panel deforms, while the remaining areas exhibit the same or similar rigidity as the undeformed state. Since the stiffness adjustment layer is attached to the flexible display panel, the parts of the flexible display panel that need to deform can deform smoothly, while the undeformed parts can be well supported, ensuring the flatness of the flexible display panel. Attached Figure Description

[0017] Figure 1 This illustration shows a structural schematic diagram of the deformation sensing layer and stiffness adjustment layer of a flexible display panel in an unfolded state according to an embodiment of this application.

[0018] Figure 2 This illustration shows a structural schematic diagram of the deformation sensing layer and stiffness adjustment layer of a flexible display panel in a bending state according to an embodiment of this application.

[0019] Figure 3 A schematic diagram of the structure of a flexible display panel according to an embodiment of this application is shown.

[0020] Explanation of icon numbers:

[0021] 10. Flexible display panel;

[0022] 20. Polyvinylidene fluoride membrane;

[0023] 31. Magnetorheological layer; 32. Magnetic induction layer; 321. Electrode thin film layer; 321a. First electrode thin film; 321b. Second electrode thin film; 322. Electromagnetic thin film layer;

[0024] 40. Supporting membrane;

[0025] 50. Cover plate. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] Currently, bendable displays can be achieved using liquid crystal displays (LCDs) and organic light-emitting diode (OLED) display panels. Among them, OLED displays, benefiting from their self-emissive nature, are easier to achieve bendable displays with smaller bending radii when fabricated on flexible substrates. Therefore, the fabrication of OLED display panels incorporating flexible substrates has attracted widespread attention.

[0033] As products demand more technology, the need for flexible products is increasing, and bending, folding, and even deformable products are gradually coming into the consumer spotlight. For example, flexible display panels are widely used in automotive displays, mobile phones, laptops, tablets, and other display devices due to their bendable, rollable, and sliding properties.

[0034] However, dynamic product applications place more stringent demands on product reliability. For example, currently used foldable products have a constant modulus in the folded area of ​​the back panel. After repeated folding, a decrease in the flatness of the back panel is easily observed in the unfolded state. Taking automotive displays as an example, flexible AMOLED display panels, due to their ability to fold, roll, and slide, are highly advantageous for the shape and space of the vehicle interior. In related technologies, to achieve the sliding function, fishbone-shaped or chain-shaped steel sheets are set on the back of the screen as support members. These support members support the screen, enabling it to slide and bend. However, because the support members are thin and patterned, the support they can provide is insufficient. At the same time, because the screen includes a multi-layered structure such as polarizers and cover plates, stress will be generated at the bending points, resulting in unevenness and weak strength of the screen.

[0035] To address the aforementioned issues, this application provides a display module that incorporates a stiffness adjustment layer and a deformation sensing layer on the backlight side of the display panel. The deformation sensing layer detects the deformation state of the display panel. Taking a bent display panel as an example, after sensing the bent state, the elastic modulus of the stiffness adjustment layer is adjusted to ensure that the bent position is flexible while the non-bent position is rigid. This provides support for the display panel while maintaining its flatness.

[0036] Figure 1 This illustration shows a structural schematic diagram of the deformation sensing layer and stiffness adjustment layer of a flexible display panel in an unfolded state according to an embodiment of this application. Figure 2 This illustration shows a structural schematic diagram of the deformation sensing layer and stiffness adjustment layer of a flexible display panel in a bent state according to an embodiment of this application. Figure 3 A schematic diagram of the structure of a flexible display panel according to an embodiment of this application is shown.

[0037] See Figure 1 , Figure 2 and Figure 3 An embodiment of this application provides a display module including a flexible display panel 10, a deformation sensing layer, a stiffness adjustment layer, and a control module. The deformation sensing layer and the stiffness adjustment layer are stacked on one side of the flexible display panel 10. For example, the flexible display panel 10 has a first side and a second side opposite to the first side, and the deformation sensing layer and the stiffness adjustment layer are disposed on the second side of the flexible display panel 10. The control module is electrically connected to the deformation sensing layer and the stiffness adjustment layer. Because the deformation sensing layer is stacked with the flexible display panel 10, when the flexible display panel 10 deforms, the deformation sensing layer also deforms accordingly. The deformation sensing layer is configured to generate an electrical signal in response to its own deformation; the control module is configured to control the elastic modulus of the stiffness adjustment layer corresponding to the deformed portion of the deformation sensing layer to be less than the elastic modulus of the stiffness adjustment layer corresponding to the undeformed portion of the deformation sensing layer, based on the electrical signal generated by the deformation sensing layer. Based on this, the control module can adjust the elastic modulus of each part of the stiffness adjustment layer according to the deformation of the flexible display panel 10.

[0038] It is understood that single-sided display panels typically have a light-emitting side and a backlight side that are opposite to each other. In this embodiment, the first side corresponds to the light-emitting side, and the second side corresponds to the backlight side. The elastic modulus can be considered an indicator of how easily a material undergoes elastic deformation. The larger the value, the greater the stress required to cause a certain elastic deformation in the material, i.e., the greater the material stiffness, meaning that under a certain stress, the elastic deformation is smaller. The electrical connection between the control module and the deformation sensing layer and stiffness adjustment layer can specifically be achieved by connecting a control board with control circuitry to the deformation sensing layer and stiffness adjustment layer via wiring.

[0039] The display module provided in this application embodiment, by stacking a stiffness adjustment layer and a deformation sensing layer on one side of the flexible display panel 10, configures a control module electrically connected to the deformation sensing layer and the stiffness adjustment layer to control the elastic modulus of the deformation sensing layer corresponding to the deformed portion of the stiffness adjustment layer to be less than the elastic modulus of the undeformed portion of the deformation sensing layer corresponding to the deformation sensing layer, based on the electrical signal generated by the deformation of the deformation sensing layer. Therefore, when the flexible display panel 10 deforms, by adjusting the elastic modulus of the stiffness adjustment layer, the area of ​​the flexible display panel 10 corresponding to the deformation portion of the stiffness adjustment layer can exhibit flexibility, while the remaining areas exhibit rigidity similar to or the same as the undeformed state. Since the stiffness adjustment layer is attached to the flexible display panel 10, the parts of the flexible display panel 10 that need to deform can deform smoothly, while the undeformed parts can receive good support, ensuring the flatness of the flexible display panel 10. Furthermore, since the area of ​​the stiffness adjustment layer corresponding to the deformation part of the flexible display panel 10 is in a flexible state under deformation, the repeated changes in the shape of the flexible display panel 10 are less likely to leave wrinkles.

[0040] In some embodiments, the display module has a bent state; the flexible display panel 10 has a bent portion and a straight portion in the bent state; in the bent state, the control module is configured to control the elastic modulus of the portion of the stiffness adjustment layer corresponding to the bent portion to be less than the elastic modulus of the portion of the stiffness adjustment layer corresponding to the straight portion. Based on this, in the bent state, the portion of the stiffness adjustment layer corresponding to the bent portion can be adjusted to a flexible state, and the portion of the stiffness adjustment layer corresponding to the straight portion can be adjusted to a rigid state. This ensures that the bent portion of the flexible display panel 10 can bend smoothly, and also provides good support for the straight portion of the flexible display panel 10, thereby ensuring the flatness of the flexible display panel 10 in the bent state.

[0041] In some embodiments, the display module further has an unfolded state. In the unfolded state, the control module is configured to control the elastic modulus of the stiffness adjustment layer to reach a preset threshold. The preset threshold is greater than or equal to the elastic modulus of the portion of the stiffness adjustment layer corresponding to the flat portion. Based on this, in the unfolded state, the stiffness adjustment layer can be adjusted to a rigid state, thereby providing good support for the flexible display panel 10. The stiffness of the stiffness adjustment layer in the unfolded state is the same as or different from the stiffness of the region of the flexible display panel 10 corresponding to the flat portion in the bent state.

[0042] In some embodiments, the stiffness adjustment layer includes a magnetorheological layer 31 and a magnetic induction layer 32. The magnetic induction layer 32 is electrically connected to the control module and is configured to adjust the magnetic field strength of the portion of the magnetorheological layer 31 corresponding to the deformation sensing layer, thereby changing the elastic modulus of the corresponding portion of the magnetorheological layer 31. Based on this, when the flexible display panel 10 is in an unfolded state, the magnetorheological layer 31 is kept rigid to provide good support for the flexible display panel 10. When the flexible display panel 10 is in a bent state, the elastic modulus of the corresponding portion of the magnetorheological layer 31 is adjusted by the magnetic induction layer 32, making the corresponding portion of the magnetorheological layer 31 flexible while the rest remains rigid. This ensures smooth bending while providing good support for the flexible display panel 10, guaranteeing its flatness.

[0043] Optionally, the magnetorheological layer 31 includes a magnetorheological adhesive. The magnetorheological adhesive disperses magnetic particles into a gel matrix to form a stable gel-like system whose mechanical properties can change rapidly under an applied magnetic field. Taking a flexible display panel 10 in a bent state as an example, when the magnetic induction layer 32 adjusts the magnetic field of the environment in which the magnetorheological layer 31 is located, the elastic modulus of the magnetorheological layer 31 changes accordingly. This allows the elastic modulus of the magnetorheological layer 31 to be adjusted according to the bent and unbent states of the flexible display panel 10, ensuring good support for the display panel in both bent and unbent states.

[0044] Optionally, the flexible display panel 10 has a backlight side, on which the magnetorheological layer 31 and the magnetic induction layer 32 are stacked. In this way, the magnetorheological layer 31 and the magnetic induction layer 32 will not block the light emission path of the flexible display panel 10, thereby ensuring good light emission effect.

[0045] Optionally, the magnetic induction layer 32 includes an electrode thin film layer 321 and an electromagnetic thin film layer 322, with the electromagnetic thin film layer 322 disposed opposite to the electrode thin film layer 321. For example, the electrode thin film layer 321 is located on the side of the stiffness adjustment layer closer to the flexible display panel 10, and the electromagnetic thin film layer 322 is located on the side of the electrode thin film layer 321 away from the flexible display panel 10. The magnetorheological layer 31 is located between the electrode thin film layer 321 and the electromagnetic thin film layer 322. The control module is electrically connected to the electrode thin film layer 321 and the electromagnetic thin film layer 322, and is configured to control and adjust the magnetic field strength generated by the electromagnetic thin film layer 322 according to the voltage change of the electrode thin film layer 321, thereby adjusting the elastic modulus of the portion of the magnetorheological layer 31 that deforms in the flexible display panel 10 under bending conditions. Exemplarily, based on the voltage change of the electrode thin film layer 321, the control module controls the voltage applied to the electromagnetic thin film layer 322, causing the electromagnetic thin film layer 322 to generate a corresponding magnetic field, thereby adjusting the magnetic field of the environment in which the magnetorheological layer 31 is located. Based on this, when the display panel is in a non-bent state, the electromagnetic thin film layer 322 acts on the magnetorheological layer 31 through a magnetic field, making the magnetorheological layer 31 in a rigid state, thereby ensuring the support effect of the display panel in a non-bent state; when the display panel is in a bent state, the electromagnetic thin film layer 322 acts on the magnetorheological layer 31 through a magnetic field, making the area of ​​the magnetorheological layer 31 corresponding to the bent part in a flexible state, and the area corresponding to the non-bent part in a rigid state, thereby ensuring the bending effect and support effect of the display panel in a bent state.

[0046] In one exemplary embodiment, the electrode thin film layer 321 is in direct contact with the deformation sensing layer, thereby facilitating the electrical connection between the electrode thin film layer 321 and the deformation sensing layer. Further, the deformation sensing layer is disposed between the magnetorheological layer 31 and the electrode thin film layer 321, and the electromagnetic thin film layer 322 is disposed on the side of the magnetorheological layer opposite to the deformation sensing layer. This facilitates the electrical connection between the electromagnetic thin film layer 322 and the control module. Simultaneously, the magnetic field generated by the electromagnetic thin film layer 322 can act on the magnetorheological layer 31 at a closer distance, improving its sensitivity.

[0047] In some embodiments, such as Figure 2As shown, the electrode thin film layer 321 includes a first electrode thin film 321a and a second electrode thin film 321b disposed opposite to each other, forming a parallel-plate capacitor. The first electrode thin film 321a is located on the side of the electrode thin film layer 321 closer to the deformation sensing layer, and the second electrode thin film 321b is located on the side of the electrode thin film layer 321 closer to the flexible display panel 10. Exemplarily, the deformation sensing layer formed by the polyvinylidene fluoride film layer 20 is in direct contact with the first electrode thin film 321a to change the voltage between the first electrode thin film 321a and the second electrode thin film 321b when the polyvinylidene fluoride film layer 20 deforms and generates charge accumulation. Based on this, when the polyvinylidene fluoride film layer 20 generates charge accumulation on its surface due to deformation, the voltage between the first electrode thin film 321a and the second electrode thin film 321b changes, thereby achieving the effect of deformation sensing.

[0048] Optionally, the electrode thin film layer 321 includes a minimum voltage change monitoring unit with a preset voltage change threshold. When the voltage change of the electrode thin film layer 321 reaches the preset voltage change threshold, the control module controls and adjusts the magnetic field strength generated by the electromagnetic thin film layer 322 according to the voltage change of the electrode thin film layer 321. Based on this, when the deformation generated by the deformation sensing layer is very small and the voltage change of the electrode thin film layer 321 does not reach the preset voltage change threshold, the control module does not adjust the magnetic field strength, thus improving the energy-saving performance of the display module.

[0049] For example, the electrode thin film layer 321 can be patterned through coating and photolithography processes to obtain the desired shape. Based on this, the patterned electrode thin film layer 321 can be divided into multiple regions, each region being electrically connected to a corresponding sub-module of the control module. For example, the electrode thin film layer 321 includes a first region and a second region that do not overlap. The control module includes a first sub-module and a second sub-module, with the first region electrically connected to the first sub-module and the second region electrically connected to the second sub-module. The deformation sensing layer includes a first deformation region corresponding to the first region and a second deformation region corresponding to the second region. The electromagnetic thin film layer includes a first magnetic field region corresponding to the first region and a second magnetic field region corresponding to the second region. Thus, when the deformation degrees of the first deformation region and the second deformation region are different, the magnetic field strength of the first magnetic field region and the second magnetic field region can be controlled by the first sub-module and the second sub-module respectively, allowing the elastic modulus of the first deformation region and the second deformation region to be adjusted independently. For example, when the deformation degree of the first deformation region is higher than that of the second deformation region, the flexibility of the first deformation region is controlled to be higher than that of the second deformation region through the first submodule and the second submodule. In other embodiments, the electrode thin film layer 321 may be divided into three, four, five, six or more regions.

[0050] Furthermore, the preset voltage change threshold of the minimum monitoring voltage change unit can be adjusted as needed to more sensitively regulate the magnetic field strength based on the deformation generated by the deformation sensing layer.

[0051] In some embodiments, the deformation sensing layer includes a polyvinylidene fluoride (PVDF) film layer 20. When the display panel changes from a non-bent state to a bent state, the PVDF film layer 20 bends accordingly, and charge accumulates on the surface of the PVDF film layer 20 at the bent portion. Taking a stiffness adjustment layer including a magnetorheological layer 31 and a magnetic induction layer 32, where the magnetic induction layer 32 includes an electrode thin film layer 321 and an electromagnetic thin film layer 322, as an example, the charge accumulation generated by the bending of the PVDF film layer 20 changes the voltage of the electrode thin film layer 321. The control module controls and adjusts the magnetic field strength generated by the electromagnetic thin film layer 322 according to the voltage change of the electrode thin film layer 321, thereby changing the magnetic field of the environment in which the magnetorheological layer 31 is located, and thus adjusting the elastic modulus of the portion of the flexible display panel 10 that deforms in the bent state corresponding to the magnetorheological layer 31.

[0052] In some embodiments, the display module further includes a support film 40 (BPF) disposed on the second side of the flexible display panel 10; a deformation sensing layer and a stiffness adjustment layer are disposed on the side of the support film 40 opposite to the flexible display panel 10. The provision of the support film 40 further enables the surface of the second side of the flexible display panel 10 to be supported by a flat film layer.

[0053] Furthermore, the display module also includes a touch panel, which is attached to the light-emitting side of the flexible display panel 10, and a cover plate 50 is provided on the side of the touch panel away from the flexible display panel 10.

[0054] For the same purpose, this application also provides a display device, which includes the display module in the above embodiments.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display module, characterized in that, include: Flexible display panel; A deformation sensing layer and a stiffness adjustment layer are stacked on one side of the flexible display panel. as well as The control module is electrically connected to the deformation sensing layer and the stiffness adjustment layer; The control module is configured to, when the flexible display panel deforms, control the elastic modulus of the stiffness adjustment layer corresponding to the deformed part of the deformation sensing layer to be less than the elastic modulus of the stiffness adjustment layer corresponding to the undeformed part of the deformation sensing layer, based on the electrical signal generated by the deformation sensing layer. The display module has a bent state; the flexible display panel has a bent portion and a straight portion in the bent state; in the bent state, the control module is configured to control the elastic modulus of the portion of the stiffness adjustment layer corresponding to the bent portion to be less than the elastic modulus of the portion of the stiffness adjustment layer corresponding to the straight portion. The display module also has an unfolded state, in which the control module is configured to control the elastic modulus of the stiffness adjustment layer to reach a preset threshold. The preset threshold is greater than or equal to the elastic modulus of the portion of the stiffness adjustment layer corresponding to the straight section; The stiffness adjustment layer includes: Magnetorheological layer; and A magnetic induction layer is electrically connected to the control module. The magnetic induction layer is configured to adjust the magnetic field strength of the environment in which the deformation sensing layer corresponds to the deformed part of the magnetorheological layer is located, so as to change the elastic modulus of the corresponding part of the magnetorheological layer. The magnetic induction layer includes: An electrode thin film layer is located on the side of the stiffness adjustment layer closest to the flexible display panel; An electromagnetic thin film layer is located on the side of the electrode thin film layer that faces away from the flexible display panel; The magnetorheological layer is located between the electrode thin film layer and the electromagnetic thin film layer; The control module is configured to adjust the magnetic field strength generated by the electromagnetic thin film layer according to the voltage change of the electrode thin film layer, thereby adjusting the elastic modulus of the magnetorheological layer corresponding to the deformed portion of the deformation sensing layer.

2. The display module according to claim 1, characterized in that, The magnetorheological layer comprises magnetorheological adhesive.

3. The display module according to claim 2, characterized in that, The deformation sensing layer is disposed between the magnetorheological layer and the electrode thin film layer, and the electromagnetic thin film layer is disposed on the side of the magnetorheological layer opposite to the deformation sensing layer and is electrically connected to the control module.

4. The display module according to claim 3, characterized in that, The electrode thin film layer includes a first electrode thin film and a second electrode thin film disposed opposite to each other. The first electrode thin film and the second electrode thin film form a parallel plate capacitor. The first electrode thin film is located on the side of the electrode thin film layer closer to the deformation sensing layer, and the second electrode thin film is located on the side of the electrode thin film layer closer to the flexible display panel.

5. The display module according to claim 3, characterized in that, The electrode thin film layer includes a minimum monitoring voltage change unit with a preset voltage change threshold. When the voltage change of the electrode thin film layer reaches the preset voltage change threshold, the control module controls and adjusts the magnetic field strength generated by the electromagnetic thin film layer according to the voltage change of the electrode thin film layer.

6. The display module according to claim 1, characterized in that, The deformation sensing layer includes a polyvinylidene fluoride (PVDF) film layer.

7. The display module according to claim 1, characterized in that, The display module also includes a support film disposed on one side of the flexible display panel; The deformation sensing layer and the stiffness adjustment layer are disposed on the side of the support film opposite to the flexible display panel.

8. A display device, characterized in that, Includes the display module as described in any one of claims 1-7.

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