Display module and display device

Abstract

This application discloses a display module and a display device, belonging to the field of display technology. The display module includes a display panel, a touch layer, and a first functional layer. The display panel displays at least one virtual button. The touch layer is located on the light-emitting side of the display panel. The first functional layer is located on the side of the display panel away from the touch layer and includes at least one piezoelectric unit. Each piezoelectric unit includes a pressure detection unit. The virtual button overlaps with at least one piezoelectric unit, and the pressure detection unit is used to detect the pressure on the overlapping portion of the touch layer and the virtual button. This application can reduce the number of accidental touch commands executed by the display module and improve the accuracy of input.

Description

Technical Field

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

[0002] In related technologies, display panels can show virtual buttons to function as virtual keyboards. However, when users type by clicking the virtual buttons, they may accidentally touch other parts of the display panel, resulting in accidental touches on other virtual buttons. This causes the display module to execute the accidental touch commands, leading to a decrease in input accuracy.

[0003] Therefore, it is necessary to propose a new technical solution to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this application is to provide a display module and display device that can reduce the number of accidental touch commands executed by the display module and improve the accuracy of input.

[0005] To solve the above problems, the technical solution of this application is as follows: In a first aspect, this application proposes a display module, comprising: A display panel that displays at least one virtual button; A touch layer is disposed on the light-emitting side of the display panel; and A first functional layer is disposed on the side of the display panel away from the touch layer. The first functional layer includes at least one piezoelectric unit, and each piezoelectric unit includes a pressure detection unit. The virtual button overlaps with at least one of the piezoelectric units, and the pressure detection unit is used to detect the pressure on the part of the touch layer that overlaps with the virtual button.

[0006] In one embodiment of this application, the pressure detection unit includes a first sub-electrode, a first piezoelectric part, and a second sub-electrode that are stacked in the thickness direction of the display module.

[0007] In one embodiment of this application, each of the piezoelectric units further includes a vibration feedback unit configured to generate vibration upon receiving a vibration command.

[0008] In one embodiment of this application, the vibration feedback unit includes a third sub-electrode, a second piezoelectric part, and a fourth sub-electrode that are overlapped in the thickness direction of the display module.

[0009] In one embodiment of this application, the pressure detection unit and the vibration feedback unit are arranged on the same layer.

[0010] In one embodiment of this application, the first functional layer includes: A first electrode layer is disposed on the light-emitting side of the display panel, and the first electrode layer includes a first sub-electrode and a third sub-electrode; A piezoelectric layer is disposed on the side of the first electrode layer away from the display panel, the piezoelectric layer including a first piezoelectric portion and a second piezoelectric portion; and The second electrode layer is disposed on the side of the piezoelectric layer away from the display panel, and the second electrode layer includes the second sub-electrode and the fourth sub-electrode.

[0011] In one embodiment of this application, the first sub-electrode and the third sub-electrode are integrally connected.

[0012] In one embodiment of this application, the first piezoelectric part and the second piezoelectric part are integrally connected.

[0013] In one embodiment of this application, the second sub-electrode and the fourth sub-electrode are spaced apart.

[0014] In one embodiment of this application, the display module further includes a processor; The processor is electrically connected to the pressure detection unit, and the processor is configured to determine whether to execute the corresponding touch command based on the touch voltage provided by the pressure detection unit.

[0015] In one embodiment of this application, the processor is electrically connected to the vibration feedback unit; The processor is also configured to send a vibration command to the vibration feedback unit after determining that the touch command needs to be executed.

[0016] In one embodiment of this application, the display module is a foldable display module, and the foldable display module has a folding axis; The display panel includes a first display section and a second display section connected to each other. The connection between the first display section and the second display section overlaps with the folding axis. The first display section displays at least one virtual button. When the foldable display module is in the unfolded state, the first functional layer overlaps with the first display part only in the thickness direction of the foldable display module.

[0017] Secondly, this application proposes a display device, including a display module, the display module comprising: A display panel that displays at least one virtual button; A touch layer is disposed on the light-emitting side of the display panel; and A first functional layer is disposed on the side of the display panel away from the touch layer. The first functional layer includes at least one piezoelectric unit, and each piezoelectric unit includes a pressure detection unit. The virtual button overlaps with at least one of the piezoelectric units, and the pressure detection unit is used to detect the pressure on the part of the touch layer that overlaps with the virtual button.

[0018] In this application, a first functional layer is provided on the backlight side of the display panel. The first functional layer includes piezoelectric units, each of which includes a pressure detection unit. Each virtual button overlaps with at least one piezoelectric unit. When a user types by clicking a virtual button, the corresponding pressure detection unit can detect that the pressure applied by the finger is greater than or equal to a first preset pressure, and the display module executes the touch command for that virtual button click. When a user accidentally touches a virtual button, since the pressure applied to the virtual button is usually less than the pressure applied to the button click, the corresponding pressure detection unit can detect that the pressure applied by the finger is less than the first preset pressure, and the display module does not execute the touch command for that virtual button touch. This application distinguishes between the user's clicking virtual button action and accidental virtual button touch action through the pressure detection unit, thereby executing the touch command for the user's clicking virtual button action and not executing the touch command for the user's accidental virtual button touch action. This application can reduce the number of accidental touch commands executed by the display module and improve input accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0021] Figure 1 This is a schematic diagram of a display module according to this application; Figure 2 This is a schematic diagram of a display panel according to this application; Figure 3 This is a schematic diagram of the first functional layer of this application.

[0022] Explanation of reference numerals in the attached figures: 100, Display module; Z, Thickness direction; 1. Display panel; 11. First display section; 111. Virtual buttons; 12. Second display section; 13. Folding hinge; 2. Touch layer; 3. First functional layer; 31. First electrode layer; 32. Piezoelectric layer; 33. Second electrode layer; 34. Substrate; 4. Cover plate; T, piezoelectric unit; T1, pressure detection unit; T11, first sub-electrode; T12, first piezoelectric part; T13, second sub-electrode; T2, Vibration feedback unit; T21, Third sub-electrode; T22, Second piezoelectric part; T23, Fourth sub-electrode. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0024] In related technologies, display panels can show virtual buttons to function as virtual keyboards. However, when users type by clicking the virtual buttons, they may accidentally touch other parts of the display panel, resulting in accidental touches on other virtual buttons. This causes the display module to execute the accidental touch commands, leading to a decrease in input accuracy.

[0025] It's important to understand that "accidental touch" in this article refers to a finger making contact with the display module surface with a force other than that applied to a virtual button. Examples include: a finger making slight contact with the screen without applying pressure, or one finger clicking a virtual button while another finger accidentally touches a different virtual button.

[0026] If a user accidentally clicks another virtual button with the force of a click, resulting in incorrect input, this is considered a user-caused input error and not the accidental touch problem that this application aims to address.

[0027] In related technologies, to improve the interactive experience of smart devices, rotor motors or linear motors are integrated into the devices to achieve vibration feedback. While rotor motors or linear motors can simulate the vibration feedback of physical buttons, they occupy a large amount of internal space, limiting the design flexibility of smart devices. In foldable screens, to achieve vibration feedback, a linear motor is installed on each of the left and right sides of the lower screen; however, linear motors cannot achieve localized vibration. Furthermore, existing vibration feedback technologies generally lack dynamic frequency adjustment capabilities, failing to adapt to diverse operating scenarios and limiting further improvements in user experience.

[0028] This application discloses a display device, which can be a tablet computer, e-reader, electronic display screen, laptop computer, mobile phone, augmented reality (AR) / virtual reality (VR) device, media player, wearable device, digital camera, car navigation system, etc. The display device includes a display module 100.

[0029] Please see Figure 1 This application proposes a display module 100, including a display panel 1, a touch layer 2, and a first functional layer 3.

[0030] Display panel 1 displays at least one virtual button 111.

[0031] The touch layer 2 is located on the light-emitting side of the display panel 1.

[0032] The first functional layer 3 is located on the side of the display panel 1 away from the touch layer 2.

[0033] The first functional layer 3 includes at least one piezoelectric unit T. Each piezoelectric unit T includes a pressure detection unit T1.

[0034] The virtual button 111 overlaps with at least one piezoelectric unit T. The pressure detection unit T1 is used to detect the pressure on the portion of the touch layer 2 that overlaps with the virtual button 111.

[0035] In this embodiment, a first functional layer 3 is provided on the backlight side of the display panel 1. The first functional layer 3 includes a piezoelectric unit T, and the piezoelectric unit T includes a pressure detection unit T1. Each virtual button 111 overlaps with at least one piezoelectric unit T. When a user's finger types by clicking the virtual button 111, the corresponding pressure detection unit T1 can detect that the pressure of the finger clicking the virtual button 111 is greater than or equal to a first preset pressure, and the display module 100 executes the touch command for clicking the virtual button 111. When a user's finger accidentally touches the virtual button 111, since the force of touching the virtual button 111 is usually less than the force of clicking the virtual button 111, the corresponding pressure detection unit T1 can detect that the pressure of the finger touching the virtual button 111 is less than the first preset pressure, and the display module 100 does not execute the touch command for touching the virtual button 111. In this embodiment, the pressure detection unit T1 distinguishes between the user's clicking virtual button 111 behavior and the accidental touching virtual button 111 behavior, thereby executing the touch command for the user's clicking virtual button 111 behavior and not executing the touch command for the user's accidental touching virtual button 111 behavior. This embodiment can reduce the number of accidental touch commands executed by the display module 100, thereby improving the accuracy of input.

[0036] Optionally, the first preset pressure can be set according to the user's input habits.

[0037] In this embodiment, when the image area of ​​the virtual button 111 is small, the virtual button 111 can overlap with one pressure detection unit T1. When the image area of ​​the virtual button 111 is large, the virtual button 111 can overlap with multiple pressure detection units T1.

[0038] When multiple pressure detection units T1 corresponding to the same virtual button 111 trigger detection behavior: If multiple pressure detection units T1 detect that the corresponding pressure is less than the first preset pressure, the display module 100 will not execute the above touch command.

[0039] If any one of the multiple pressure detection units T1 detects that the corresponding pressure is greater than or equal to the first preset pressure, the display module 100 executes the touch command.

[0040] Optionally, the display module 100 also includes a cover plate 4. The cover plate 4 is located on the side of the touch layer 2 away from the display panel 1.

[0041] In this embodiment, the cover plate 4 can be rigid glass or ultra-thin glass (UTG / UFG) with folding properties. The cover plate 4 is used to protect the touch layer 2, the display panel 1, and the first functional layer 3.

[0042] Optionally, the touch layer 2 is an inter-capacitive touch layer 2.

[0043] In this application, because different users have different input habits, some users prefer a stronger click force, while others prefer a weaker click force. Therefore, this application does not limit the value of the first preset pressure. The first preset pressure is set according to the input habits of different users.

[0044] Please see Figure 2 Optionally, the display module 100 is a foldable display module 100. The foldable display module 100 has a folding axis 13.

[0045] The display panel 1 includes a first display section 11 and a second display section 12 connected to each other. The connection between the first display section 11 and the second display section 12 overlaps with the folding axis 13. The first display section 11 displays at least one virtual button 111.

[0046] When the foldable display module 100 is in the unfolded state, the first functional layer 3 overlaps with the first display part 11 only in the thickness direction Z of the foldable display module 100.

[0047] In this embodiment, the foldable display module 100 includes two display areas. The two display areas are a first display unit 11 and a second display unit 12. When typing, the first display unit 11 displays virtual keys 111, and the second display unit 12 displays the text. This embodiment incorporates a virtual keyboard into the foldable display module 100, eliminating the need for a physical keyboard, reducing the thickness of the display module 100, achieving a layout without physical keys, and improving the user's typing experience.

[0048] Please see Figure 3 Optionally, the pressure detection unit T1 includes a first sub-electrode T11, a first piezoelectric part T12, and a second sub-electrode T13 that are stacked on top of each other in the thickness direction Z of the display module 100.

[0049] In this embodiment, when a finger clicks or accidentally touches the virtual button 111, a touch pressure is applied to the pressure detection unit T1. The first piezoelectric part T12 is made of a piezoelectric material. Piezoelectric materials have a positive piezoelectric effect. Under the touch pressure of the finger, the first piezoelectric part T12 deforms and generates charge separation, forming a touch voltage between the first sub-electrode T11 and the second sub-electrode T13.

[0050] The display module 100 can calculate the touch pressure applied by the finger to the virtual button 111 based on the above-mentioned touch voltage, and then compare the touch pressure with the first preset pressure to determine whether the user's finger touch on the virtual button 111 is a click or a mis-touch.

[0051] The display module 100 can also convert the first preset pressure into a first preset voltage, and then compare the magnitude of the touch voltage with the first preset voltage to determine whether the user's finger touch on the virtual button 111 is a click or a mis-touch.

[0052] To avoid redundancy, this application will subsequently use the comparison of touch pressure and a first preset pressure as an example, but the method of comparing touch voltage and a first preset voltage is not excluded. This application can also determine whether a user's finger contact with the virtual button 111 is a click or an accidental touch by comparing the touch voltage and the first preset voltage. The specific principle is similar to the example of comparing touch pressure and a first preset pressure, and will not be elaborated upon here.

[0053] When the value of the touch pressure is greater than or equal to the value of the first preset pressure, the display module 100 determines that the user's finger touch on the virtual button 111 is a click behavior, and the display module 100 executes the touch command.

[0054] When the value of the touch pressure is less than the value of the first preset pressure, the display module 100 determines that the user's finger touch on the virtual button 111 is a mis-touch behavior, and the display module 100 does not execute the above touch command, thereby reducing the number of mis-touch touch commands executed by the display module 100 and improving the accuracy of input.

[0055] Optionally, the display module 100 also includes a processor. The processor is electrically connected to the pressure detection unit T1 and is configured to determine whether to execute a corresponding touch command based on the touch voltage provided by the pressure detection unit T1.

[0056] In this embodiment, the processor is electrically connected to the pressure detection unit T1. When a finger clicks or accidentally touches the virtual button 111, the processor can obtain the touch voltage formed between the first sub-electrode T11 and the second sub-electrode T13. The processor compares the value of the touch voltage with the value of a first preset voltage to determine whether to execute the corresponding touch command.

[0057] Specifically, when the value of the touch pressure is greater than or equal to the value of the first preset pressure, the processor determines that the user's finger touch on the virtual button 111 is a click behavior, and the processor executes the touch command.

[0058] When the touch pressure value is less than the first preset pressure value, the processor determines that the user's finger touch on the virtual button 111 is a mis-touch behavior, and the processor does not execute the above touch command, thereby reducing the number of mis-touch touch commands executed by the display module 100 and improving the accuracy of input.

[0059] Optionally, each piezoelectric unit T also includes a vibration feedback unit T2, which is configured to generate vibration upon receiving a vibration command.

[0060] Optionally, the processor is electrically connected to the vibration feedback unit T2. The processor is also configured to send a vibration command to the vibration feedback unit T2 after determining that a touch command needs to be executed.

[0061] In this embodiment, after the processor determines that the user's finger is clicking, it will also send a vibration command to the vibration feedback unit T2, and the vibration feedback unit T2 will vibrate after receiving the vibration command.

[0062] After the processor determines that the user's finger touch is accidental, it will not send a vibration command to the vibration feedback unit T2. The vibration feedback unit T2 will not vibrate when it does not receive a vibration command.

[0063] The vibrations described above can simulate the input experience of physical keys, thereby improving the user's typing experience. Users can also use the presence or absence of vibration to determine whether the corresponding input has been completed.

[0064] In this embodiment, each piezoelectric unit T includes a pressure detection unit T1 and a vibration feedback unit T2. Since the piezoelectric unit T overlaps with the virtual key 111, when the processor determines that the corresponding virtual key 111 executes a touch command, the vibration feedback unit T2 overlapping with the virtual key 111 vibrates, thereby achieving a localized vibration effect. Compared to related technologies where linear motors cannot achieve localized vibration, the solution in this embodiment can further improve the user's touch feedback, thereby enhancing the user's typing experience.

[0065] In this embodiment, after the processor compares the touch voltage with the first preset voltage: When the touch pressure is less than the first preset pressure, the processor determines that the user's touch on the virtual button 111 is a mis-touch. The processor does not execute the touch command, nor does it send a vibration command to the vibration feedback unit T2. The vibration feedback unit T2 does not vibrate when it does not receive a vibration command, thus avoiding vibration feedback caused by mis-touches. If the user's touch on the virtual button 111 is too weak, resulting in incomplete input, the lack of vibration will alert the user to the insufficient pressure, allowing them to increase the input pressure and complete the touch on the virtual button 111.

[0066] When the touch pressure value is greater than or equal to the first preset pressure value, the processor determines that the user's finger contact with the virtual button 111 is a click action. The processor executes the aforementioned touch instruction and also sends a vibration instruction to the vibration feedback unit T2. The vibration feedback unit T2 vibrates upon receiving the vibration instruction, thereby achieving vibration feedback similar to that of a physical button and improving the user's input experience.

[0067] Optionally, the vibration feedback unit T2 includes a third sub-electrode T21, a second piezoelectric part T22, and a fourth sub-electrode T23 that are overlapped in the thickness direction Z of the display module 100.

[0068] In this embodiment, the material of the second piezoelectric part T22 is a piezoelectric material. Piezoelectric materials exhibit the inverse piezoelectric effect. After the vibration feedback unit T2 receives the vibration command, An alternating voltage is applied between the third sub-electrode T21 and the fourth sub-electrode T23, thereby forming an alternating electric field. The second piezoelectric part T22 deforms and vibrates under the action of the alternating electric field, and transmits the vibration to the surface of the cover plate 4 and reaches the finger. The user's finger feels the vibration, thus realizing vibration feedback.

[0069] Optionally, the processor is configured with a first preset pressure and a second preset pressure. The first preset pressure is greater than 0, and the second preset pressure is greater than the first preset pressure.

[0070] When the touch pressure value is greater than or equal to the first preset pressure and less than the second preset pressure, the processor sends a first vibration command to the vibration feedback unit T2. After receiving the first vibration command, the vibration feedback unit T2 applies a first alternating voltage between the third sub-electrode T21 and the fourth sub-electrode T23. The first alternating voltage has a first amplitude and a first frequency, thereby forming a first alternating electric field. The second piezoelectric part T22 vibrates weakly in the first alternating electric field, and the user's finger can feel the weak vibration.

[0071] When the touch pressure value is greater than or equal to the second preset pressure, the processor sends a second vibration command to the vibration feedback unit T2. After receiving the second vibration command, the vibration feedback unit T2 applies a second alternating voltage between the third sub-electrode T21 and the fourth sub-electrode T23. The second alternating voltage has a second amplitude and a second frequency, thereby forming a second alternating electric field. The second piezoelectric part T22 vibrates strongly in the second alternating electric field, and the user's finger can feel a strong vibration.

[0072] Wherein, the second amplitude is greater than the first amplitude; and / or, the second frequency is greater than the first frequency.

[0073] This embodiment can provide corresponding vibration feedback based on the user's actual touch pressure. When the user taps the virtual button 111 with light pressure, the vibration feedback unit T2 generates a weak vibration. When the user taps the virtual button 111 with heavier pressure, the vibration feedback unit T2 generates a stronger vibration. This allows for the rapid definition of multiple modes of vibration feedback based on user habits, improving the user's input experience.

[0074] Optionally, the processor can also set multiple gradient preset pressures greater than the first preset pressure, thereby further subdividing the vibration feedback and further improving the user's typing experience. The specific principle is similar to that of the above embodiments, and will not be described in detail here.

[0075] Optionally, the pressure detection unit T1 and the vibration feedback unit T2 are arranged on the same floor.

[0076] In this embodiment, the pressure detection unit T1 and the vibration feedback unit T2 are arranged on the same layer. Compared with the scheme of arranging the pressure detection unit T1 and the vibration feedback unit T2 on different layers, this embodiment can reduce the thickness of the display module 100, realizing the design of an ultra-thin display module 100.

[0077] Optionally, the first functional layer 3 includes a first electrode layer 31, a piezoelectric layer 32, and a second electrode layer 33.

[0078] The first electrode layer 31 is disposed on the light-emitting side of the display panel 1. The first electrode layer 31 includes a first sub-electrode T11 and a third sub-electrode T21.

[0079] The piezoelectric layer 32 is disposed on the side of the first electrode layer 31 away from the display panel 1. The piezoelectric layer 32 includes a first piezoelectric part T12 and a second piezoelectric part T22.

[0080] The second electrode layer 33 is disposed on the side of the piezoelectric layer 32 away from the display panel 1. The second electrode layer 33 includes a second sub-electrode T13 and a fourth sub-electrode T23.

[0081] In this embodiment, since the first sub-electrode T11 and the third sub-electrode T21 are arranged in the same layer, the first piezoelectric part T12 and the second piezoelectric part T22 are arranged in the same layer, and the second sub-electrode T13 and the fourth sub-electrode T23 are arranged in the same layer, the scheme of setting the pressure detection unit T1 and the vibration feedback unit T2 in the same layer is realized, thereby achieving the effect of reducing the thickness of the display module 100.

[0082] The piezoelectric layer 32 is made of a piezoelectric material. The first electrode layer 31 and the second electrode layer 33 can be made of metal or transparent conductive material. The materials of the first electrode layer 31 and the second electrode layer 33 are selected according to the actual product requirements. When the display module 100 is a transparent display module 100, the materials of the first electrode layer 31 and the second electrode layer 33 can be transparent indium tin oxide.

[0083] Optionally, the first functional layer 3 further includes a substrate 34. The substrate 34 is disposed on the side of the first electrode layer 31 away from the piezoelectric layer 32. The substrate 34 is used to protect the first functional layer 3, and the substrate 34 can also provide a buffer for the first functional layer 3.

[0084] Optionally, the first sub-electrode T11 and the third sub-electrode T21 are integrally connected.

[0085] In this embodiment, the first sub-electrode T11 and the third sub-electrode T21 are integrally connected, which can reduce the process of patterning the first sub-electrode T11 and the third sub-electrode T21, thereby reducing the mask template and reducing production costs.

[0086] Optionally, the first piezoelectric part T12 and the second piezoelectric part T22 are integrally connected.

[0087] In this embodiment, since the piezoelectric material exhibits both direct and inverse piezoelectric effects, the first piezoelectric part T12 and the second piezoelectric part T22 are integrally connected. This reduces the process of patterning the first piezoelectric part T12 and the second piezoelectric part T22, thereby reducing the number of photomasks and lowering production costs.

[0088] Optionally, the second sub-electrode T13 and the fourth sub-electrode T23 are spaced apart.

[0089] In this embodiment, the second sub-electrode T13 and the fourth sub-electrode T23 are spaced apart to avoid short-circuiting between the pressure detection unit T1 and the vibration feedback unit T2, thereby improving the stability of the internal structure of the display module 100.

[0090] In the description of this application, 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0091] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0092] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0093] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display module, characterized in that, include: A display panel that displays at least one virtual button; A touch layer is disposed on the light-emitting side of the display panel; as well as A first functional layer is disposed on the side of the display panel away from the touch layer. The first functional layer includes at least one piezoelectric unit, and each piezoelectric unit includes a pressure detection unit. The virtual button overlaps with at least one of the piezoelectric units, and the pressure detection unit is used to detect the pressure on the part of the touch layer that overlaps with the virtual button.

2. The display module as described in claim 1, characterized in that, The pressure detection unit includes a first sub-electrode, a first piezoelectric part, and a second sub-electrode that are overlapped in the thickness direction of the display module.

3. The display module as described in claim 2, characterized in that, Each of the piezoelectric units further includes a vibration feedback unit configured to generate vibration upon receiving a vibration command.

4. The display module as described in claim 3, characterized in that, The vibration feedback unit includes a third sub-electrode, a second piezoelectric part, and a fourth sub-electrode that are overlapped in the thickness direction of the display module.

5. The display module as described in claim 4, characterized in that, The pressure detection unit and the vibration feedback unit are located on the same floor.

6. The display module as described in claim 5, characterized in that, The first functional layer includes: A first electrode layer is disposed on the light-emitting side of the display panel, and the first electrode layer includes a first sub-electrode and a third sub-electrode; A piezoelectric layer is disposed on the side of the first electrode layer away from the display panel, the piezoelectric layer including a first piezoelectric portion and a second piezoelectric portion; and The second electrode layer is disposed on the side of the piezoelectric layer away from the display panel, and the second electrode layer includes the second sub-electrode and the fourth sub-electrode.

7. The display module as described in claim 6, characterized in that, The first sub-electrode and the third sub-electrode are integrally connected.

8. The display module as described in claim 6, characterized in that, The first piezoelectric part and the second piezoelectric part are integrally connected.

9. The display module as described in claim 6, characterized in that, The second sub-electrode and the fourth sub-electrode are spaced apart.

10. The display module as described in claim 3, characterized in that, The display module also includes a processor; The processor is electrically connected to the pressure detection unit, and the processor is configured to determine whether to execute the corresponding touch command based on the touch voltage provided by the pressure detection unit.

11. The display module as described in claim 10, characterized in that, The processor is electrically connected to the vibration feedback unit; The processor is also configured to send a vibration command to the vibration feedback unit after determining that the touch command needs to be executed.

12. The display module as described in any one of claims 1-11, characterized in that, The display module is a foldable display module, and the foldable display module has a folding axis; The display panel includes a first display section and a second display section connected to each other. The connection between the first display section and the second display section overlaps with the folding axis. The first display section displays at least one virtual button. When the foldable display module is in the unfolded state, the first functional layer overlaps with the first display part only in the thickness direction of the foldable display module.

13. A display device, characterized in that, Includes the display module as described in any one of claims 1-12.

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