Sound production film layer, display module, and display apparatus

Abstract

The present disclosure relates to the technical field of display, and provides a sound production film layer, a display module, and a display apparatus. The sound production film layer comprises a fixed layer, a vibration layer, a plurality of first support structures, and a plurality of second support structures. A sound cavity is arranged between the vibration layer and the fixed layer. The plurality of first support structures are arranged at intervals in the sound cavity, and are configured to elastically support the vibration layer when the vibration layer vibrates towards the fixed layer. The plurality of second support structures are disposed in the sound cavity, and are located in gaps between the plurality of first support structures arranged at intervals. The height of the second support structures is less than the height of the first support structures in the thickness direction of the fixed layer. The sound production film layer is not prone to attachment during operation.

Description

Sound-emitting membrane layer, display module, and display device Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a generating film layer, a display module, and a display device. Background Art

[0002] Traditional display devices such as mobile phones, computers, and televisions require one or more speakers to output sound. To reduce the size of display devices, related art proposes a display panel with a sound-emitting membrane layer on its surface to output sound. However, the membrane is prone to adsorption during operation, leading to failure.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide a sound-emitting membrane layer, a display module, and a display device, wherein the sound-emitting membrane layer is not prone to adsorption during operation.

[0005] To achieve the above objectives, the embodiments of the present disclosure adopt the following technical solutions:

[0006] In one aspect, a sound-emitting membrane layer is provided, comprising:

[0007] fixed layer;

[0008] a vibration layer, wherein a sound cavity is provided between the vibration layer and the fixed layer;

[0009] a plurality of first supporting structures arranged at intervals in the sound cavity and configured to elastically support the vibration layer when the vibration layer vibrates toward the fixed layer;

[0010] A plurality of second supporting structures are arranged in the sound cavity and located in the gaps between the plurality of first supporting structures; along the thickness direction of the fixing layer, the height of the second supporting structure is less than the height of the first supporting structure.

[0011] In some embodiments, when the vibration layer vibrates toward the fixed layer, the first supporting structure is elastically compressed, and the second supporting structure supports the vibration layer.

[0012] In some embodiments, when the vibration layer vibrates toward the fixed layer, the second supporting structure is elastically compressed.

[0013] In some embodiments, the elastic compression amount of the second supporting structure is greater than or equal to 0.1 μm and less than or equal to 2 μm.

[0014] In some embodiments, the height of the first support structure is H1, 10 μm≤H1≤15 μm; and / or the height of the second support structure is H2, 5 μm≤H2≤8 μm.

[0015] In some embodiments, the volume of the second support structure is less than or equal to the volume of the first support structure.

[0016] In some embodiments, the orthographic projection area of ​​the second supporting structure on the fixed layer is less than or equal to the orthographic projection area of ​​the first supporting structure on the fixed layer.

[0017] In some embodiments, the size of the orthographic projection of the second support structure on the fixed layer is greater than or equal to 25 μm and less than or equal to 80 μm; and / or the size of the orthographic projection of the first support structure on the fixed layer is greater than or equal to 180 μm and less than or equal to 250 μm.

[0018] In some embodiments, the second supporting structure is connected to the fixed layer and / or the vibration layer.

[0019] In some embodiments, the fixed layer includes a fixed electrode layer, the vibration layer includes a vibration electrode layer, the fixed electrode layer and / or the vibration electrode layer are further provided with an insulating layer on the side facing the sound cavity, and the second supporting structure is connected to the insulating layer.

[0020] In some embodiments, the first supporting structure and the second supporting structure are both connected to the fixed layer, or the first supporting structure and the second supporting structure are both connected to the vibration layer.

[0021] In some embodiments, one or more second supporting structures are provided between two adjacent first supporting structures.

[0022] In some embodiments, a support area is provided between two adjacent first support structures, the support area is at the same distance from the two adjacent first support structures, and the second support structure is provided in the support area.

[0023] In some embodiments, a second supporting structure is provided in at least a portion of the supporting area, and the second supporting structure is located at the geometric center of the supporting area.

[0024] In some embodiments, a plurality of the second supporting structures are provided in at least a portion of the supporting area, and the plurality of second supporting structures are symmetrically distributed relative to a geometric center of the supporting area.

[0025] In some embodiments, a plurality of second support structures are provided around the first support structure, and the plurality of second support structures are arranged at intervals along the circumference of the first support structure.

[0026] In some embodiments, the sounding membrane layer further comprises:

[0027] A diaphragm layer, arranged on a side of the vibration electrode layer away from the fixed layer;

[0028] a first conductive ring connected to a side of the vibration electrode layer facing the fixed layer, and extending along an edge of the vibration electrode layer;

[0029] a second conductive ring connected to a side of the fixed electrode layer facing the vibration layer, and extending along an edge of the fixed electrode layer;

[0030] The elastic double-sided adhesive is provided between the first conductive ring and the second conductive ring and is configured to separate the fixing layer and the vibration layer by a preset distance.

[0031] On the other hand, a display module is provided, including a display panel and the sound-emitting membrane layer.

[0032] In some embodiments, the display panel has a light emitting surface, and the sound-emitting membrane layer is disposed on the light emitting surface of the display panel.

[0033] In some embodiments, the sound-emitting membrane layer and the display panel are an integrally formed structure, or the sound-emitting membrane layer is adhered to the surface of the display panel.

[0034] In some embodiments, the display panel is a liquid crystal display panel, which includes an array substrate, a color film substrate and a spacer. The array substrate and the color film substrate are arranged in a box, and the spacer is located between the array substrate and the color film substrate. The material of the first supporting structure and the second supporting structure of the sounding membrane layer is the same as the material of the spacer.

[0035] On the other hand, a display device is provided, comprising the display module.

[0036] In the sound-generating membrane, display module, and display device provided by the embodiments of the present disclosure, when the vibration layer vibrates toward the fixed layer, the area of ​​the vibration layer adjacent to the first support structure, supported by the first support structure, is less likely to contact the fixed layer and cause adsorption. The area of ​​the vibration layer between two adjacent first support structures, lacking the support of the first support structure, experiences greater deformation and is more likely to contact the fixed layer and cause adsorption. To address this issue, the second support structure is positioned within the gaps between the first support structures. With the support of the second support structure, the vibration layer is less likely to contact the fixed layer and cause adsorption, thereby improving adsorption during operation of the sound-generating membrane. Along the thickness of the fixed layer, the height of the second support structure is less than that of the first support structure. During the initial stage of the vibration layer's vibration toward the fixed layer, the first support structure contacts the fixed layer, causing the vibration layer and the fixed layer to jointly compress the first support structure, thereby elastically compressing the first support structure and generating an elastic force. Because the height of the second support structure is less than that of the first support structure, during the initial stage of the vibration layer's vibration toward the fixed layer, the second support structure is not compressed, and the resistance to the vibration layer is the sum of the elastic forces of the individual first support structures. In other words, after providing multiple second supporting structures, in the initial stage when the vibration layer vibrates toward the fixed layer, the vibration resistance of the vibration layer is not increased, and the sound effect of the sound-generating membrane layer is taken into account. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0038] FIG1 is a cross-sectional view of a sound-emitting membrane layer in the related art;

[0039] FIG2 is a cross-sectional view of a sound-emitting membrane layer provided by an embodiment of the present disclosure;

[0040] FIG3 is a diagram showing the connection relationship of a sound-emitting membrane layer provided by an embodiment of the present disclosure;

[0041] FIG4 is a cross-sectional view of a sound-emitting membrane layer provided by an embodiment of the present disclosure;

[0042] FIG5 is a schematic diagram of an orthographic projection of a first supporting structure on a fixed layer in a sounding membrane layer provided by an embodiment of the present disclosure;

[0043] FIG6 is a schematic diagram of an orthographic projection of a first supporting structure on a fixed layer in a sounding membrane layer provided by an embodiment of the present disclosure;

[0044] FIG7 is a cross-sectional view of another sound-emitting membrane layer provided by an embodiment of the present disclosure;

[0045] FIG8 is a cross-sectional view of another sound-emitting membrane layer provided by an embodiment of the present disclosure;

[0046] FIG9 is a schematic diagram of the orthographic projection of a first supporting structure and a second supporting structure on a fixed layer in a sounding membrane layer provided by an embodiment of the present disclosure;

[0047] FIG10 is a cross-sectional view of another sound-emitting membrane layer provided in an embodiment of the present disclosure;

[0048] FIG11 is a schematic diagram of the orthographic projection of the first supporting structure and the second supporting structure of the sounding membrane layer on the fixed layer according to an embodiment of the present disclosure;

[0049] FIG12 is a schematic diagram of the orthographic projection of the first supporting structure and the second supporting structure of the sounding membrane layer on the fixed layer according to an embodiment of the present disclosure;

[0050] FIG13 is a schematic diagram of the orthographic projection of the first supporting structure and the second supporting structure of the sounding membrane layer on the fixed layer according to an embodiment of the present disclosure;

[0051] FIG14 is a schematic diagram of the orthographic projection of the first supporting structure and the second supporting structure of the sounding membrane layer on the fixed layer according to an embodiment of the present disclosure;

[0052] FIG15 is a cross-sectional view of a display module provided by an embodiment of the present disclosure;

[0053] FIG16 is a schematic diagram of a display device provided in an embodiment of the present disclosure.

[0054] Figure numerals: 1000-display device; 1100-display module; 100-sounding membrane layer; 200-display panel; 300-mainboard; 10-fixed layer; 20-vibration layer; 30-first supporting structure; 40-second supporting structure; 50-elastic double-sided adhesive; 60-sound cavity; 11-fixed electrode layer; 12-second conductive ring; 13-second insulating layer; 21-vibrating electrode layer; 22-first insulating layer; 23-diaphragm layer; 24-first conductive ring; 61-supporting area; 201-upper polarizer; 202-lower polarizer. Specific embodiments

[0055] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0056] In the embodiments of the present disclosure, words such as "first", "second", "third", and "fourth" are used to distinguish between identical or similar items with substantially the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present disclosure, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0057] In the embodiments of the present disclosure, “a plurality of” means two or more, and “at least one” means one or more, unless otherwise clearly and specifically defined.

[0058] In the embodiments of the present disclosure, the orientations or positional relationships indicated by terms such as “upper” and “lower” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present disclosure and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present disclosure.

[0059] Figure 1 is a cross-sectional view of a sound-generating membrane layer in the related art. As shown in Figure 1, the sound-generating membrane layer in the related art includes a lower electrode, a vibrating membrane, and multiple support columns. The vibrating membrane and the lower electrode form a sound-generating cavity. The support columns are spaced apart within the cavity and connected to the vibrating membrane to maintain a certain distance between the vibrating membrane and the lower electrode. The vibrating membrane includes an upper electrode. When an alternating voltage is applied between the upper and lower electrodes, the vibrating membrane vibrates in a direction toward or away from the lower electrode due to the Coulomb force, thereby generating sound waves.

[0060] FIG1 shows a situation where the sound-generating membrane layer experiences adsorption. Continuing to refer to FIG1 , when the vibrating membrane vibrates toward the lower electrode, the distance between the vibrating membrane and the lower electrode is relatively close, which easily causes the vibrating membrane to contact and adsorb with the lower electrode. After adsorption, the vibrating membrane cannot rebound normally, which is adsorption, and thus cannot vibrate and produce sound normally, causing the sound-generating membrane layer to fail or the effect to deteriorate. For example, the area between two adjacent support pillars in the vibrating membrane (the adsorption area within the elliptical dotted box in FIG1 ) is prone to adsorption, while the area of ​​the vibrating membrane close to the support pillar (the non-adsorbed area within the rectangular dotted box in FIG1 ) is not prone to adsorption due to the support of the support pillar.

[0061] One way to solve the above problem is to increase the number of support columns, that is, to increase the arrangement density of the support columns so that each area of ​​the vibration membrane is supported by support columns to prevent the vibration membrane from being adsorbed by the lower electrode.

[0062] Because the support columns are located within the sound cavity, they occupy the volume of the cavity. The sound quality of the sound-generating membrane layer is directly related to the volume of the cavity. Increasing the number of support columns reduces the volume of the cavity, thus affecting the sound quality of the sound-generating membrane layer. Furthermore, during the vibration of the diaphragm, the support columns come into contact with the lower electrode, causing the lower electrode to exert resistance on the diaphragm through the support columns. Increasing the number of support columns increases the resistance experienced by the diaphragm during vibration, also affecting the sound quality of the sound-generating membrane layer.

[0063] In view of this, the embodiments of the present disclosure provide a sound-generating membrane layer, which improves the adsorption phenomenon while taking into account the sound-generating effect of the sound-generating membrane layer.

[0064] Figure 2 is a cross-sectional view of a sound-generating membrane layer provided in an embodiment of the present disclosure. As shown in Figure 2, the sound-generating membrane layer 100 provided in an embodiment of the present disclosure includes a fixed layer 10 and a vibration layer 20. A sound cavity 60 is formed between the fixed layer 10 and the vibration layer 20. The vibration layer 20 can vibrate toward or away from the fixed layer 10, thereby generating sound waves.

[0065] For example, the sound-emitting membrane layer 100 may further include a frame, which is located between the fixed layer 10 and the vibration layer 20 and is connected to the edges of the fixed layer 10 and the vibration layer 20 at the same time, so that the fixed layer 10, the vibration layer 20 and the frame together form a closed sound cavity 60.

[0066] The frame can be elastic, and the frame can be compressed or stretched when the vibration layer 20 vibrates relative to the fixed layer 10. For example, the frame includes an annular elastic double-sided adhesive 50, one side of the elastic double-sided adhesive 50 is bonded to the fixed layer 10, and the other side of the frame is bonded to the vibration layer 20.

[0067] During the sound generation process of the sound-generating membrane layer 100 , the fixing layer 10 can remain fixed. For example, the fixing layer 10 can be used to connect the sound-generating membrane layer to a carrier, for example, the sound-generating membrane layer 100 is connected to the surface of the display panel 200 through the fixing layer 10 .

[0068] The fixed layer 10 includes a fixed electrode layer 11, and the vibration layer 20 includes a vibration electrode layer 21. The fixed electrode layer 11 and the vibration electrode layer 21 are arranged opposite each other and spaced apart. During operation of the sound-generating membrane layer 100, the fixed electrode layer 11 and the vibration electrode layer 21 are electrically connected to an external circuit, so that a voltage is applied between the fixed electrode layer 11 and the vibration electrode layer 21, thereby accumulating charge in the fixed electrode layer 11 and the vibration electrode layer 21, respectively. The charge in the fixed electrode layer 11 interacts with the charge in the vibration electrode layer 21 under the influence of the Coulomb force, thereby driving the vibration layer 20 toward or away from the fixed layer 10. When a varying voltage (e.g., an alternating voltage) is applied between the fixed electrode layer 11 and the vibration electrode layer 21, the vibration layer 20 vibrates and produces sound under the action of the varying voltage.

[0069] Figure 3 shows the connections of a sound-generating membrane layer 100 according to an embodiment of the present disclosure. As shown in Figure 3, a mainboard 300, such as a printed circuit board (PCB), is electrically connected to the fixed electrode layer 11 and the vibrating electrode layer 21 via transmission lines. Sound signals within the mainboard 300 are transmitted via the transmission lines to the sound-generating membrane layer 100, causing the sound-generating membrane layer 100 to output sound corresponding to the sound signals.

[0070] Exemplarily, the mainboard 300 is electrically connected to the sound-generating membrane layer 100 via a flexible printed circuit (FPC). For example, the mainboard 300 is electrically connected to the sound-generating membrane layer 100 via two flexible printed circuits, one of which is electrically connected to the fixed electrode layer 11 by a binding method, and the other flexible printed circuit is electrically connected to the vibration electrode layer 21 by a binding method.

[0071] The fixed electrode layer 11 and the vibrating electrode layer 21 can be made of conductive materials such as metals and metal oxides. When the sound-emitting membrane layer 100 is connected to the light-emitting surface of the display panel 200, to prevent the fixed electrode layer 11 and the vibrating electrode layer 21 from blocking light from the display panel 200, the fixed electrode layer 11 and the vibrating electrode layer 21 can be made of transparent conductive materials such as indium tin oxide (ITO), graphene, metal nanowires, carbon nanotubes, conductive polymers, and silver, copper, or aluminum films. It should be noted that the materials of the fixed electrode layer 11 and the vibrating electrode layer 21 can be the same or different.

[0072] For example, when indium tin oxide is used as the material for the fixed electrode layer 11, to improve the conductivity of the fixed electrode layer 11, the fixed electrode layer 11 may include multiple stacked conductive layers. For example, the fixed electrode layer 11 may include a stacked indium tin oxide layer, a silver target layer, and an indium tin oxide layer. Similarly, when indium tin oxide is used as the material for the vibration electrode layer 21, the vibration electrode layer 21 may also include multiple stacked conductive layers.

[0073] Exemplarily, the thickness of the fixed electrode layer 11 and the vibrating electrode layer 21 is 50 nm to 80 nm. For example, the thickness of the fixed electrode layer 11 and the vibrating electrode layer 21 is any value selected from 50 nm, 55 nm, 60 nm, 65 nm, 70 nm, 75 nm, and 80 nm, or a value within a range consisting of any two values. It should be noted that the thicknesses of the fixed electrode layer 11 and the vibrating electrode layer 21 may be the same or different.

[0074] The fixed layer 10 can have a single-layer structure, for example, the fixed layer 10 includes only the fixed electrode layer 11. The fixed layer 10 can also have a multi-layer structure, for example, the fixed layer 10 includes the fixed electrode layer 11 and an adhesive layer, the adhesive layer being disposed on a side of the fixed electrode layer 11 away from the vibration layer 20 and used to bond the fixed electrode layer 11 to the carrier. In another example, the fixed layer 10 includes the fixed electrode layer 11 and an insulating film, the insulating film being disposed on a side of the fixed electrode layer 11 facing the vibration membrane to prevent the fixed electrode layer 11 from contacting and shorting with the vibration electrode layer 21.

[0075] Continuing with Figures 1 and 2 , the sound-emitting membrane layer 100 may further include a second conductive ring 12 connected to the periphery of the fixed electrode layer 11. The second conductive ring 12 is electrically connected to the fixed electrode layer 11, thereby reducing the resistance of the fixed layer 10 and improving the consistency of the sound signal across various regions within the fixed layer 10.

[0076] The second conductive ring 12 can be made of a conductive material such as metal, for example, copper, silver, gold, etc.

[0077] Exemplarily, the thickness of the second conductive ring 12 (dimension in the Y direction shown in FIG1 ) is 0.5 μm to 2 μm. For example, the thickness of the second conductive ring 12 is any value selected from 0.5 μm, 0.6 μm, 0.8 μm, 1 μm, 1.5 μm, 1.8 μm, and 2 μm, or a value in a range consisting of any two values.

[0078] Exemplarily, the width W of the second conductive ring 12 is 1.1 mm to 1.3 mm. For example, the width W2 of the second conductive ring 12 is any value selected from 1.1 mm, 1.15 mm, 1.2 mm, 1.25 mm, and 1.3 mm, or a value in a range consisting of any two values.

[0079] For example, when the sound-emitting membrane layer 100 is connected to the light-emitting surface of the display panel 200 , the positive projection of the second conductive ring 12 on the display panel 200 is located in the non-display area at the periphery of the display panel 200 to prevent the second conductive ring 12 from affecting the display effect of the display panel 200 .

[0080] Exemplarily, the mainboard 300 is connected to the second conductive ring 12 via a transmission line. The second conductive ring 12 is located at the edge of the fixed electrode layer 11 , thereby facilitating electrical connection with the mainboard 300 .

[0081] For example, the second conductive ring 12 is connected to the side of the fixed electrode layer 11 facing the vibration layer 20. This allows the second conductive ring 12 to function as part of the frame, thereby reducing the thickness of the sound-emitting membrane layer 100 (the Y direction shown in FIG1 ). Alternatively, the second conductive ring 12 can be connected to the side of the fixed electrode layer 11 away from the vibration layer 20.

[0082] Continuing with Figures 1 and 2 , the sound-emitting membrane layer 100 may further include a first conductive ring 24 connected to the periphery of the vibration electrode layer 21. The first conductive ring 24 is electrically connected to the vibration electrode layer 21, thereby reducing the resistance of the vibration layer 20 and improving the consistency of the sound signal across various regions within the vibration layer 20.

[0083] The first conductive ring 24 can be made of a conductive material such as metal, for example, copper, silver, gold, etc.

[0084] Exemplarily, the thickness of the first conductive ring 24 (dimension in the Y direction shown in FIG1 ) is 0.5 μm to 2 μm. For example, the thickness of the second conductive ring 12 is any value selected from 0.5 μm, 0.6 μm, 0.8 μm, 1 μm, 1.5 μm, 1.8 μm, and 2 μm, or a value within a range consisting of any two values.

[0085] Exemplarily, the width W1 of the first conductive ring 24 is 1.1 mm to 1.3 mm. For example, the width W1 of the first conductive ring 24 is any value selected from 1.1 mm, 1.15 mm, 1.2 mm, 1.25 mm, and 1.3 mm, or a value in a range consisting of any two values.

[0086] For example, when the sound-emitting membrane layer 100 is connected to the light-emitting surface of the display panel 200 , the positive projection of the first conductive ring 24 on the display panel 200 is located in the non-display area at the periphery of the display panel 200 to prevent the first conductive ring 24 from affecting the display effect of the display panel 200 .

[0087] Exemplarily, the main board 300 is connected to the first conductive ring 24 via a transmission line. The first conductive ring 24 is located at the edge of the vibration electrode layer 21 , thereby facilitating electrical connection with the main board 300 .

[0088] For example, the first conductive ring 24 is connected to the side of the vibration electrode layer 21 facing the fixed layer 10. This allows the first conductive ring 24 to function as part of the frame, thereby reducing the thickness of the sound-emitting membrane layer 100 (in the Y direction as shown in FIG1 ). Alternatively, the first conductive ring 24 can be connected to the side of the vibration electrode layer 21 facing away from the fixed layer 10.

[0089] When the sound-emitting membrane layer 100 includes both the first conductive ring 24 and the second conductive ring 12 , one side of the frame may be connected to the first conductive ring 24 , and the other side of the frame may be connected to the second conductive ring 12 .

[0090] The vibration layer 20 may be a multi-layer structure. For example, as shown in FIG. 1 and FIG. 2 , the vibration layer 20 includes a vibration electrode layer 21 and a diaphragm layer 23 . The diaphragm layer 23 is configured to undergo elastic deformation under the action of Coulomb force.

[0091] The material of the diaphragm layer 23 can be an organic material. For example, the material of the diaphragm layer 23 is polyethylene terephthalate (PET).

[0092] Exemplarily, the thickness of the diaphragm layer 23 is 20 μm to 100 μm. For example, the thickness of the diaphragm layer 23 is any value among 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, or a value in a range consisting of any two values.

[0093] The diaphragm layer 23 can be disposed on the side of the vibrating electrode layer 21 away from the fixed layer 10 to reduce the distance between the vibrating electrode layer 21 and the fixed electrode layer 11, thereby reducing the voltage used to drive the sound-generating membrane layer 100. Of course, the diaphragm layer 23 can also be disposed on the side of the vibrating electrode layer 21 facing the fixed layer 10.

[0094] The vibration layer 20 can also be a single-layer structure, for example, the vibration layer 20 only includes the vibration electrode layer 21. In this case, the vibration electrode layer 21 serves as both the electrode and the diaphragm of the sound-emitting membrane layer 100, reducing the number of membrane layers in the sound-emitting membrane layer 100, lowering the process complexity, and reducing the thickness of the sound-emitting membrane layer 100.

[0095] 1 and 2 , the sounding membrane layer 100 further includes a plurality of first support structures 30, which are arranged at intervals within the sound cavity 60 and between the fixed layer 10 and the vibration layer 20. For example, the plurality of first support structures 30 are arranged at intervals along the plane where the vibration layer 20 is located.

[0096] The acoustic membrane layer 100 has an initial state and a vibrating state. The initial state refers to the state when no voltage is applied to the acoustic membrane layer 100, and the vibrating state refers to the state when the vibration layer 20 vibrates toward the fixed layer 10. Figures 1 and 2 show the initial state of the acoustic membrane layer 100.

[0097] When the sounding membrane layer 100 is in the initial state, the first supporting structure 30 is located between the fixed layer 10 and the vibration layer 20 , and is used to keep a certain distance between the fixed layer 10 and the vibration layer 20 to prevent the vibration layer 20 from collapsing toward the fixed layer 10 .

[0098] When the sounding membrane layer 100 is in a vibrating state, the first supporting structure 30 elastically supports the vibration layer 20 to prevent the vibration layer 20 from contacting the fixed layer 10 and causing adsorption. In addition, when the vibration layer 20 vibrates in a direction away from the fixed layer 10, the first supporting structure 30 provides elastic force for the rebound of the vibration layer 20. Figure 4 is a cross-sectional view of a sounding membrane layer 100 provided in an embodiment of the present disclosure, and Figure 4 shows that the sounding membrane layer 100 is in a vibrating state. Specifically, when the vibration layer 20 moves toward the fixed layer 10, the vibration layer 20 squeezes the first supporting structure 30, causing the first supporting structure 30 to elastically contract and generate an elastic force, as shown in Figure 4. When the vibration layer 20 vibrates in a direction away from the fixed layer 10, the first supporting structure 30 rebounds and applies an elastic force to the vibration layer 20.

[0099] The first support structure 30 can be made of an elastic material. For example, the first support structure 30 can be made of the same material as the spacers (PS) in the LCD panel 200. The spacers in the LCD panel 200 are located between the array substrate and the color filter substrate, defining the area for filling with liquid crystal material. The material of the first support structure 30 is the same as that of the spacers, and the same manufacturing process for the LCD panel 200 can be used to manufacture the sound-emitting membrane layer 100.

[0100] The orthographic projection of the first support structure 30 on the fixed layer 10 can be circular, elliptical, or polygonal, such as a triangle, square, pentagon, or hexagon, or other irregular shapes. The present embodiment does not limit the orthographic projection of the first support structure 30. Figure 5 is a schematic diagram of the orthographic projection of the first support structure 30 on the fixed layer 10 in a sounding membrane layer 100 provided in an embodiment of the present disclosure. Figure 5 illustrates the case where the orthographic projection of the first support structure 30 is circular. For ease of description, the following description will only use the case where the orthographic projection of the first support structure 30 is circular as an example.

[0101] Exemplarily, dimension A of the first support structure 30 along the X direction shown in FIG5 (the diameter of the circle when the orthographic projection of the first support structure 30 is a circle) is 180 μm to 250 μm. For example, dimension A of the first support structure 30 along the X direction shown in FIG1 is any value selected from 180 μm, 190 μm, 200 μm, 210 μm, 220 μm, 230 μm, 240 μm, and 250 μm, or a value within a range consisting of any two values.

[0102] Illustratively, the height of the first support structure 30 (the dimension along the Y direction shown in FIG1 ) is 10 μm to 15 μm. For example, the height of the first support structure 30 is any value selected from 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, and 15 μm, or a value in a range consisting of any two values.

[0103] Continuing with Figure 5 , the multiple first support structures 30 can be arranged in a rectangular array, forming multiple rows extending along the X-direction and multiple columns extending along the Y-direction. Figure 6 is a schematic diagram of the orthographic projection of the first support structures 30 on the fixed layer 10 in a sounding membrane layer 100 provided in an embodiment of the present disclosure. As shown in Figure 6 , adjacent rows can also be offset by a certain distance along the X-direction.

[0104] For example, with continued reference to Figures 5 and 6 , along the X-direction, the distance D1 between two adjacent first support structures 30 may be 0.9 mm to 2.5 mm, for example, D1 is 0.9 mm, 1 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, or 2.5 mm. Along the Y-direction, the distance D2 between two adjacent first support structures 30 may be 0.9 mm to 2.5 mm, for example, D2 is 0.9 mm, 1 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, or 2.5 mm. D1 and D2 may be equal or unequal.

[0105] It should be noted that the number and arrangement of the first support structures 30 shown in FIG. 5 and FIG. 6 are only for schematic illustration, and the number and arrangement of the first support structures 30 in actual application are not limited thereto.

[0106] The first support structure 30 can be connected to the side of the vibration layer 20 facing the fixed layer 10, as shown in Figures 1 to 3. Figure 7 is a cross-sectional view of another sound-emitting membrane layer 100 provided in an embodiment of the present disclosure. As shown in Figure 7, the first support structure 30 can also be connected to the side of the fixed layer 10 facing the vibration layer 20, which can reduce the inertia of the vibration layer 20. Of course, the first support structure 30 can also be connected to both the vibration layer 20 and the fixed layer 10. For example, some of the multiple first support structures 30 are connected to the vibration layer 20, and some of the multiple first support structures 30 are connected to the fixed layer 10.

[0107] In the examples shown in Figures 2, 3, 4, and 7, when the sounding membrane layer is in its initial state, a gap exists between the first support structure 30 and the fixed layer 10. Figure 8 is a cross-sectional view of another sounding membrane layer 100 provided in an embodiment of the present disclosure. As shown in Figure 8, when the sounding membrane layer 100 is in its initial state, the first support structure 30 can also be in contact with both the vibration layer 20 and the fixed layer 10.

[0108] Continuing with Figure 1 , the sounding membrane layer 100 further includes a plurality of second support structures 40 disposed within the sound cavity 60 and positioned within the gaps formed by the plurality of spaced-apart first support structures 30. Continuing with Figures 5 and 6 , the plurality of first support structures 30 are spaced apart such that a gap exists between adjacent first support structures 30, with the orthographic projections of the second support structures 40 on the fixed layer 10 positioned within these gaps.

[0109] When the vibration layer 20 vibrates toward the fixed layer 10, the area of ​​the vibration layer 20 adjacent to the first support structure 30, supported by the first support structure 30, is less likely to come into contact with the fixed layer 10 and cause adsorption. The area of ​​the vibration layer 20 located between two adjacent first support structures 30, lacking the support of the first support structure 30, experiences a greater deformation and is more likely to come into contact with the fixed layer 10 and cause acoustic adsorption. To address this issue, the second support structure 40 is positioned within the gaps formed by the spaced-apart arrangement of the first support structures 30. With the support of the second support structure 40, the vibration layer 20 is less likely to come into contact with the fixed layer 10 and cause adsorption, thereby improving adsorption during the operation of the acoustic membrane layer 100.

[0110] Continuing with reference to Figure 1 , along the thickness direction of the fixed layer 10 (the Y direction shown in Figure 1 ), the height H2 of the second support structure 40 is less than the height H1 of the first support structure 30. In the initial stage of vibration of the vibration layer 20 toward the fixed layer 10, the first support structure 30 contacts the fixed layer 10, causing the vibration layer 20 and the fixed layer 10 to jointly squeeze the first support structure 30, thereby elastically compressing the first support structure 30 and generating an elastic force. As shown in Figure 3 , the first support structure 30 is elastically compressed and deformed. Because the height H2 of the second support structure 40 is less than the height H1 of the first support structure 30, the second support structure 40 is not compressed in the initial stage of vibration of the vibration layer 20 toward the fixed layer 10. The resistance experienced by the vibration layer 20 is the sum of the elastic forces of each first support structure 30. In other words, after providing multiple second support structures 40, the vibration resistance of the vibration layer 20 is not increased in the initial stage of vibration of the vibration layer 20 toward the fixed layer 10, while taking into account the sound effect of the sound-generating membrane layer 100.

[0111] Exemplarily, the height of the second support structure 40 is H2, 5 μm≤H2≤8 μm. For example, the height H2 of the second support structure 40 is any value among 5 μm, 6 μm, 7 μm, 8 μm, or a value in a range consisting of any two values.

[0112] The second support structure 40 can be made of an elastic material. For example, the second support structure 40 can be made of the same material as the spacers (PS) in the LCD panel 200. The spacers in the LCD panel 200 are located between the array substrate and the color filter substrate, defining an area for filling with liquid crystal material. The material of the second support structure 40 is the same as that of the spacers, and the same manufacturing process for the LCD panel 200 can be used to manufacture the sound-emitting membrane layer 100.

[0113] The orthographic projection of the second support structure 40 on the fixed layer 10 can be circular, elliptical, or a polygon such as a triangle, square, pentagon, or hexagon, or other irregular shape. The embodiment of the present disclosure does not limit the orthographic projection shape of the second support structure 40. Figure 9 is a schematic diagram of the orthographic projection of the first support structure 30 and the second support structure 40 on the fixed layer 10 in a sounding membrane layer 100 provided by the embodiment of the present disclosure. Figure 9 shows the case where the orthographic projection of the second support structure 40 is circular. For ease of description, the following is a schematic description using the case where the orthographic projection of the second support structure 40 is circular as an example.

[0114] The second support structure 40 can be connected to the side of the vibration layer 20 facing the sound cavity 60, as shown in Figures 2, 3, and 4. The second support structure 40 can also be connected to the side of the fixed layer 10 facing the sound cavity 60, as shown in Figure 7. Of course, the second support structure 40 can also be connected to both the vibration layer 20 and the fixed layer 10, for example, multiple second support structures 40 can be partially connected to the vibration layer 20, and multiple second support structures 40 can be partially connected to the fixed layer 10.

[0115] FIG10 is a cross-sectional view of another sound-emitting membrane layer 100 provided in an embodiment of the present disclosure. As shown in FIG10 , the first support structure 30 and the second support structure 40 can be connected to different structures. For example, the first support structure 30 is connected to the fixed layer 10, and the second support structure 40 is connected to the vibration layer 20; or, the first support structure 30 is connected to the vibration layer 20, and the second support structure 40 is connected to the fixed layer 10. The first support structure 30 and the second support structure 40 are connected to different structures, which reduces the arrangement density of the support structures compared to the first support structure 30 and the second support structure 40 being connected to the same structure, thereby reducing the process difficulty during manufacturing.

[0116] Continuing with Figures 2, 3, 4, 7, and 8, the first support structure 30 and the second support structure 40 can also be provided on the same structure. For example, the first support structure 30 and the second support structure 40 can both be connected to the vibration layer 20; or, alternatively, the first support structure 30 and the second support structure 40 can both be connected to the fixed layer 10. This prevents interference between the first support structure 30 and the second support structure 40 when there is a large misalignment between the vibration layer 20 and the fixed layer 10.

[0117] The sounding membrane layer 100 may further include an insulating layer, which is connected to the side of the fixed electrode layer 11 facing the sound cavity 60 (as shown in FIG7 ), or the insulating layer is connected to the side of the vibration electrode layer 21 facing the sound cavity 60 (as shown in FIG2 , FIG3 , FIG4 , FIG7 and FIG8 ), or the insulating layer includes a first insulating layer 22 and a second insulating layer 13, the first insulating layer 22 is connected to the side of the vibration electrode layer 21 facing the sound cavity 60, and the second insulating layer 13 is connected to the side of the fixed electrode layer 11 facing the sound cavity 60 (as shown in FIG10 ).

[0118] The first support structure 30 and the second support structure 40 can be connected to the insulating layer, facilitating their fabrication. Furthermore, the insulating layer can provide insulation between the vibrating electrode layer 21 and the fixed electrode layer 11. When provided on the vibrating electrode layer 21, the insulating layer can protect the vibrating electrode layer 21. Similarly, when provided on the fixed electrode layer 11, the insulating layer can also include the fixed electrode layer 11.

[0119] For example, the material of the insulating layer may include an organic material, such as a carbon-containing organic matter.

[0120] Exemplarily, the thickness of the insulating layer is 60 nm to 90 nm. For example, the thickness of the insulating layer is any value among 60 nm, 65 nm, 70 nm, 75 nm, 80 nm, 85 nm, 90 nm, or a value in a range consisting of any two values.

[0121] When the first insulating layer 22 is connected to the vibration electrode layer 21, the first conductive ring 24 can be located between the first insulating layer 22 and the vibration electrode layer 21. When the second insulating layer 13 is connected to the fixed electrode layer 11, the second conductive ring 12 can be located between the second insulating layer 13 and the fixed electrode layer 11. In this case, the elastic double-sided adhesive is located between the first insulating layer 22 and the second insulating layer 13.

[0122] The second support structure 40 is disposed within the sound cavity 60, which reduces the volume of the sound cavity 60. The volume of the sound cavity 60 is related to the sound effect of the sound-generating membrane layer 100. Therefore, to ensure the sound effect of the sound-generating membrane layer 100, the volume of the second support structure 40 needs to be minimized. In view of this, the volume of the second support structure 40 can be smaller than that of the first support structure 30, thereby reducing the volume of the sound cavity 60 occupied by the second support structure 40.

[0123] In some embodiments, the orthographic projection area of ​​the second support structure 40 on the fixed layer 10 can be equal to the orthographic projection area of ​​the first support structure 30 on the fixed layer 10. Taking the first support structure 30 and the second support structure 40 as an example, since the height of the second support structure 40 is less than the height of the first support structure 30, when the orthographic projection area of ​​the second support structure 40 on the fixed layer 10 is equal to the orthographic projection area of ​​the first support structure 30 on the fixed layer 10, the volume of the second support structure 40 is less than the volume of the first support structure 30.

[0124] Furthermore, the orthographic projection area of ​​the second support structure 40 on the fixed layer 10 can be smaller than the orthographic projection area of ​​the first support structure 30 on the fixed layer 10. Taking the first support structure 30 and the second support structure 40 as an example, since the height of the second support structure 40 is smaller than that of the first support structure 30, when the orthographic projection area of ​​the second support structure 40 on the fixed layer 10 is smaller than the orthographic projection area of ​​the first support structure 30 on the fixed layer 10, the volume of the second support structure 40 can be further reduced.

[0125] Exemplarily, the size of the orthographic projection of the second support structure 40 on the fixed layer 10 is greater than or equal to 25 μm and less than or equal to 80 μm. For example, the size of the orthographic projection of the second support structure 40 on the fixed layer 10 is any value selected from 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, and 80 μm, or a value within a range consisting of any two values.

[0126] When the orthographic projection of the second support structure 40 on the fixed layer 10 is a circle, the size of the orthographic projection of the second support structure 40 on the fixed layer 10 is the diameter of the circle; when the orthographic projection of the second support structure 40 on the fixed layer 10 is a rectangle, the size of the orthographic projection of the second support structure 40 on the fixed layer 10 is the length or width of the rectangle, and so on.

[0127] In some embodiments, when the vibration layer 20 vibrates toward the fixed layer 10, the first support structure 30 is elastically compressed, and the second support structure 40 supports the vibration layer 20. Specifically, when the vibration layer 20 vibrates toward the fixed layer 10, the second support structure 40 contacts the vibration layer 20, maintaining a certain distance between a portion of the vibration layer 20 and the fixed layer 10 under the support of the second support structure 40, thereby preventing adsorption between the vibration layer 20 and the fixed layer 10.

[0128] For example, the height difference between the first support structure 30 and the second support structure 40 is equal to the maximum vibration amplitude of the vibration layer 20 vibrating toward the fixed layer 10. When the distance between the vibration layer 20 and the fixed layer 10 is the shortest, the second support structure 40 is in contact with the vibration layer 20, which prevents the second support structure 40 from exerting resistance to the vibration of the vibration layer 20, while also ensuring the sound effect of the sound-emitting membrane layer 100.

[0129] In some embodiments, the second support structure 40 is elastically compressed when the vibration layer 20 vibrates toward the fixed layer 10. Specifically, during the initial stage of the vibration layer 20 vibrating toward the fixed layer 10, the vibration layer 20 compresses the first support structure 30, and the vibration layer 20 and the second support structure 40 are not in contact. During the final stage of the vibration layer 20 vibrating toward the fixed layer 10, the vibration layer 20 compresses both the first support structure 30 and the second support structure 40.

[0130] For example, the height difference between the first support structure 30 and the second support structure 40 is smaller than the maximum vibration amplitude of the vibration layer 20 vibrating toward the fixed layer 10. When the vibration layer 20 is closest to the fixed layer 10, the first support structure 30 and the second support structure 40 are elastically compressed simultaneously. This can reduce the requirements for the dimensional accuracy of the second support structure 40.

[0131] Exemplarily, when the second support structure 40 is elastically compressed, the elastic compression amount of the second support structure 40 is greater than or equal to 0.1 μm and less than or equal to 2 μm. For example, the elastic compression amount of the second support structure 40 is any value selected from 0.1 μm, 0.2 μm, 0.5 μm, 0.8 μm, 1 μm, 1.2 μm, 1.5 μm, 1.8 μm, and 2 μm, or a value within a range consisting of any two values.

[0132] The following describes the arrangement of the first support structure 30 and the second support structure 40 in accordance with exemplary embodiments and in conjunction with the accompanying drawings. It is understood that the first support structure 30 and the second support structure 40 may also be arranged in other ways, as long as the second support structure 40 is located within the gaps formed by the plurality of first support structures 30 arranged at intervals.

[0133] When the vibration layer 20 vibrates toward the fixed layer 10, the area of ​​the vibration layer 20 adjacent to the first supporting structure 30 is not easily in contact with the fixed layer 10 and adsorption occurs due to the support of the first supporting structure 30. The area of ​​the vibration layer 20 located between two adjacent first supporting structures 30 has a larger deformation amount due to the lack of support from the first supporting structure 30, and is easily in contact with the fixed layer 10 and adsorption occurs. Continuing with reference to FIG9 , the second supporting structure 40 can be provided between two adjacent first supporting structures 30. With the support of the second supporting structure 40, the vibration layer 20 is not easily in contact with the fixed layer 10 and adsorption occurs, thereby improving the adsorption phenomenon during the operation of the sound-generating membrane layer 100.

[0134] Among them, one second support structure 40 can be provided between two adjacent first support structures 30, or multiple second support structures 40 can be provided. In actual application, the number of second support structures 40 can be determined based on the spacing between two adjacent first support structures 30. When the spacing between two adjacent first support structures 30 is small, one second support structure 40 can be provided between the two adjacent first support structures 30. When the spacing between two adjacent first support structures 30 is large, multiple second support structures 40 can be provided between the two adjacent first support structures 30.

[0135] When multiple second support structures 40 are arranged between two adjacent first support structures 30, the multiple second support structures 40 can be arranged at intervals along the virtual line connecting the two adjacent first support structures 30, and the multiple second support structures 40 can be arranged at intervals along a direction perpendicular to the virtual line connecting the two adjacent first support structures 30.

[0136] Continuing with Figures 5 and 6 , a support region 61 (the region within the dotted oval box in Figures 5 and 6 ) is located between two adjacent first support structures 30. The support region 61 is equidistant from the two adjacent first support structures 30, meaning it is located centrally between the two adjacent first support structures 30. In the region between two adjacent first support structures 30, adsorption is more likely to occur in areas farther from the first support structures 30. Therefore, the distance between the support region 61 and the two adjacent first support structures 30 is relatively large. Therefore, the second support structure 40 is positioned within the support region 61 to prevent adsorption in the region of the vibration layer 20 opposite the support region 61.

[0137] It should be noted that the oval dotted-line frame in FIG. 5 and FIG. 6 does not represent the shape and size of the support area 61 , but only schematically illustrates the position of the support area 61 .

[0138] In some embodiments, a second support structure 40 may be provided in the support region 61, and the second support structure 40 is located at the geometric center of the support region 61. For example, when the support region 61 is circular, the second support structure 40 is located at the center of the circle; when the support region 61 is rectangular, the second support structure 40 is located at the intersection of the diagonals of the rectangle.

[0139] A second supporting structure 40 may be provided in all supporting areas 61 , or a second supporting structure 40 may be provided in part of the supporting areas 61 .

[0140] Exemplarily, as shown in FIG9 , a second supporting structure 40 is provided between two adjacent first supporting structures 30 along the dotted line direction, and D3 is equal to D4 , D5 is equal to D6 , and D7 is equal to D8 .

[0141] Continuing to refer to Figure 9, the multiple first support structures 30 in Figure 9 are in an array of 3 rows and 4 columns with equal spacing. The sounding membrane layer 100 can be periodically arranged with this array as the minimum unit. At this time, the density of the first support structure 30 is 12 / 35, and the density of the second support structure 40 is 23 / 35. That is, the number of first support structures 30 and second support structures 40 in Figure 9 is 35, of which there are 12 first support structures 30 and 23 second support structures 40. The density of the first support structure 30 and the second support structure 40 can be characterized by a / m and b / m, where the a value is greater than 10, the b value is greater than 2a-1, and the m value range is 3a to 10a. In actual application, it can be flexibly set as needed.

[0142] Figure 11 is a schematic diagram of the orthographic projection of the first support structure 30 and the second support structure 40 of the sounding membrane layer 100 provided in an embodiment of the present disclosure on the fixed layer 10. For example, as shown in Figure 11, along the dotted line direction, a second support structure 40 is provided between each of the two adjacent first support structures 30.

[0143] Continuing with Figure 11 , the multiple first support structures 30 in Figure 11 form a staggered array of 3 rows by 5 columns. This array can be used as the minimum unit for periodic arrangement within the acoustic membrane layer 100. In this case, the density of the first support structures 30 is 8 / 23, and the density of the second support structures 40 is 15 / 23. That is, the total number of first support structures 30 and second support structures 40 in Figure 11 is 23, of which 8 are first support structures 30 and 15 are second support structures 40.

[0144] Figure 12 is a schematic diagram of the orthographic projection of the first support structure 30 and the second support structure 40 of the sounding membrane layer 100 provided in an embodiment of the present disclosure on the fixed layer 10. For example, as shown in Figure 12, along the dotted line direction, a second support structure 40 is provided between each adjacent first support structure 30.

[0145] Continuing with Figure 12 , the multiple first support structures 30 in Figure 12 form a staggered array of 3 rows by 5 columns. This array can be used as the minimum unit for periodic arrangement within the acoustic membrane layer 100. In this case, the density of the first support structures 30 is 7 / 23, and the density of the second support structures 40 is 16 / 23. That is, the total number of first support structures 30 and second support structures 40 in Figure 12 is 23, of which there are 7 first support structures 30 and 16 second support structures 40.

[0146] In some embodiments, a plurality of second support structures 40 may be provided in the support region 61, and the plurality of second support structures 40 are symmetrically distributed relative to the geometric center of the support region 61. For example, when the support region 61 is circular, the plurality of second support structures 40 are symmetrically distributed relative to the center of the circle; when the support region 61 is rectangular, the plurality of second support structures 40 are symmetrically distributed relative to the intersection of the diagonals of the rectangle.

[0147] The plurality of second support structures 40 may be provided in all support areas 61 , or may be provided in part of the support areas 61 .

[0148] FIG13 is a schematic diagram of the orthographic projection of the first support structure 30 and the second support structure 40 of the sounding membrane layer 100 provided in an embodiment of the present disclosure onto the fixed layer 10. For example, as shown in FIG13 , two second support structures 40 may be provided within the support region 61, and the two second support structures 40 are symmetrically distributed relative to the geometric center of the support region 61 (the intersection of the two dashed lines in FIG13 ).

[0149] Continuing to refer to FIG. 13 , four second supporting structures 40 are disposed in the gaps formed between four adjacent first supporting structures 30 to improve the probability of the vibration layer 20 being adsorbed in the region between the four first supporting structures 30 .

[0150] Continuing with FIG13 , the second support structure 40 and an adjacent first support structure 30 are connected by a virtual line (a two-dot chain line in the figure). The second support structure 40 and another adjacent first support structure 30 are also connected by a virtual line (a two-dot chain line in the figure). The angle formed by these two virtual lines is α, and α can range from 75° to 170°. For example, α is any value among 75°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, and 170°, or a value within a range consisting of any two values.

[0151] Of course, it is also possible that a second supporting structure 40 is provided in part of the supporting area 61 , and a plurality of second supporting structures 40 are provided in part of the second supporting structure 40 .

[0152] In some embodiments, a plurality of second support structures 40 are provided around the first support structure 30, and the plurality of second support structures 40 are arranged at intervals along the circumference of the first support structure 30. The circumferential spacing of the plurality of second support structures 40 along the dotted circle may be equal or unequal.

[0153] The plurality of second support structures 40 are arranged at intervals along the circumference of the first support structure 30 , so that each adjacent area of ​​the first support structure 30 along the circumference is provided with a second support structure 40 , thereby reducing the probability of adsorption of the vibration layer 20 .

[0154] For example, with continued reference to FIG. 13 , a plurality of second supporting structures 40 are provided around the first supporting structure 30 , and the plurality of second supporting structures 40 are arranged at intervals along the direction of the dotted circle in the figure.

[0155] Figure 14 is a schematic diagram of the orthographic projection of the first support structure 30 and the second support structure 40 of the acoustic membrane layer 100 provided in an embodiment of the present disclosure onto the fixed layer 10. For example, as shown in Figure 14 , multiple second support structures 40 are disposed around the first support structure 30, and the multiple second support structures 40 are arranged in intervals along the dashed circles in the figure. Second support structures 40 may also be disposed in the area between two adjacent dashed circles.

[0156] In practical applications, the diameter of the dotted circle can be determined according to the height of the first support structure 30. For example, the higher the height of the first support structure 30, the less likely the area adjacent to the first support structure 30 is to be adsorbed, and the larger the diameter of the dotted circle can be set.

[0157] Figure 15 is a cross-sectional view of a display module 1100 provided in accordance with an embodiment of the present disclosure. As shown in Figure 15 , the present disclosure also provides a display module 1100 comprising a display panel 200 and the aforementioned acoustic membrane layer 100, which is connected to the display panel 200. The display panel 200 is used to display image information, while the acoustic membrane layer 100 is used to display sound information.

[0158] The display panel 200 may be a liquid crystal display panel 200 (LCD); the display panel 200 may also be an electroluminescent display panel 200 or a photoluminescent display panel 200. When the display panel 200 is an electroluminescent display panel 200, the electroluminescent display panel 200 may be an organic light-emitting diode (OLED) display panel 200 or a quantum dot light-emitting diode (QLED) display panel 200. When the display panel 200 is a photoluminescent display panel 200, the photoluminescent display panel 200 may be a quantum dot photoluminescent display panel 200.

[0159] The acoustic membrane layer 100 can be connected to the light-emitting surface of the display panel 200, or to the backlight surface of the display panel 200. Alternatively, one or more acoustic membrane layers 100 can be connected to the light-emitting surface of the display panel 200, and one or more acoustic membrane layers 100 can be connected to the backlight surface of the display panel 200. Figure 15 shows the case where the acoustic membrane layer 100 is connected to the light-emitting surface of the display panel 200. The light-emitting surface refers to the surface of the display panel 200 used to display images, and the backlight surface refers to the surface opposite to the light-emitting surface.

[0160] When the sound-emitting membrane layer 100 is connected to the light-emitting surface of the display panel 200, the distance between the sound-emitting membrane layer 100 and the user is closer, making it easier for the sound to be transmitted to the user. When the sound-emitting membrane layer 100 is connected to the backlight surface of the display panel 200, the sound-emitting membrane layer 100 does not block the light from the display panel 200, and the display effect of the display panel 200 is better.

[0161] Exemplarily, continuing to refer to Figure 15, the display module 1100 can also include an upper polarizer 201 and a lower polarizer 202, the upper polarizer 201 is located between the sound-emitting membrane layer 100 and the display panel 200, and the lower polarizer 202 is located on the backlight surface of the display panel 200.

[0162] The acoustic membrane layer 100 and the display panel 200 may be integrally formed, i.e., the individual membrane structures of the acoustic membrane layer 100 and the individual membrane structures of the display panel 200 are formed into an integral structure during the manufacturing process. For example, the individual membrane structures of the acoustic membrane layer 100 are formed on the surface of the display panel 200 using a glass-based or silicon-based semiconductor process.

[0163] Of course, the sound-emitting membrane layer 100 can also be bonded to the surface of the display panel 200, that is, the sound-emitting membrane layer 100 is connected to the surface of the display panel 200 in an external manner. In this case, the sound-emitting membrane layer 100 is a separate component that can be packaged, transported, and stored separately. When preparing the display module 1100, the sound-emitting membrane layer 100 is bonded to the surface of the display panel 200 by bonding.

[0164] When the display panel 200 is a liquid crystal display panel 200, the display panel 200 includes an array substrate, a color filter substrate, and spacers. The array substrate and the color filter substrate are arranged in a box-like manner. The spacers are located between the array substrate and the color filter substrate, defining an area for filling with liquid crystal material. The first support structure 30 and / or the second support structure 40 in the sound-emitting membrane layer 100 can be made of a spacer (PS) material. The production process of the liquid crystal display panel 200 can be adopted when manufacturing the sound-emitting membrane layer 100.

[0165] FIG16 is a schematic diagram of a display device 1000 provided in an embodiment of the present disclosure. As shown in FIG16 , the display device 1000 provided in an embodiment of the present disclosure includes the above-mentioned display module 1100. The display module 1100 can be any device that displays either moving (e.g., video) or fixed (e.g., still images) and whether text or images. For example, the display device 1000 can be a mobile phone, a wireless device, a personal data assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a video camera, a game console, a watch, a clock, a calculator, a television monitor, a flat-panel display, a computer monitor, a car display (e.g., an odometer display, etc.), a navigation system, a cockpit controller and / or display, a camera view display (e.g., a display of a rearview camera in a vehicle), an electronic photo, an electronic billboard or sign, a projector, a building structure, a packaging, and an aesthetic structure (e.g., a display of an image of a piece of jewelry). FIG16 illustrates the display device 1000 as a laptop computer.

[0166] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A sound-generating membrane layer, characterized in that: include: fixed layer; a vibration layer, wherein a sound cavity is provided between the vibration layer and the fixed layer; a plurality of first supporting structures arranged at intervals in the sound cavity and configured to elastically support the vibration layer when the vibration layer vibrates toward the fixed layer; A plurality of second supporting structures are arranged in the sound cavity and located in the gaps between the plurality of first supporting structures; along the thickness direction of the fixing layer, the height of the second supporting structure is less than the height of the first supporting structure.

2. The sound-emitting membrane layer according to claim 1, wherein: When the vibration layer vibrates toward the fixed layer, the first supporting structure is elastically compressed, and the second supporting structure supports the vibration layer.

3. The sound-emitting membrane layer according to claim 2, wherein: When the vibration layer vibrates toward the fixed layer, the second supporting structure is elastically compressed.

4. The sound-emitting membrane layer according to claim 3, wherein: The elastic compression amount of the second supporting structure is greater than or equal to 0.1 μm and less than or equal to 2 μm.

5. The sound-emitting membrane layer according to claim 1, wherein: The height of the first support structure is H1, 10 μm≤H1≤15 μm; and / or the height of the second support structure is H2, 5 μm≤H2≤8 μm.

6. The sound-emitting membrane layer according to claim 1, wherein: The volume of the second support structure is smaller than or equal to the volume of the first support structure.

7. The sound-emitting membrane layer according to claim 6, wherein: The orthographic projection area of the second supporting structure on the fixed layer is smaller than or equal to the orthographic projection area of the first supporting structure on the fixed layer.

8. The sound-emitting membrane layer according to claim 7, wherein: The size of the orthographic projection of the second supporting structure on the fixed layer is greater than or equal to 25 μm and less than or equal to 80 μm; And / or, a size of an orthographic projection of the first supporting structure on the fixed layer is greater than or equal to 180 μm and less than or equal to 250 μm.

9. The sound-emitting membrane layer according to claim 1, wherein: The second supporting structure is connected to the fixing layer and / or the vibration layer.

10. The sound-emitting membrane layer according to claim 9, wherein: The fixed layer includes a fixed electrode layer, the vibration layer includes a vibration electrode layer, an insulating layer is further provided on a side of the fixed electrode layer and / or the vibration electrode layer facing the sound cavity, and the second supporting structure is connected to the insulating layer.

11. The sound-emitting membrane layer according to claim 9, wherein: The first supporting structure and the second supporting structure are both connected to the fixing layer, or the first supporting structure and the second supporting structure are both connected to the vibration layer.

12. The sound-emitting membrane layer according to any one of claims 1 to 11, wherein: One or more second supporting structures are provided between two adjacent first supporting structures.

13. The sound-emitting membrane layer according to claim 12, wherein: A supporting area is provided between two adjacent first supporting structures. The supporting area is at the same distance from the two adjacent first supporting structures. The second supporting structure is provided in the supporting area.

14. The sound-emitting membrane layer according to claim 13, wherein: A second supporting structure is provided in at least a portion of the supporting area, and the second supporting structure is located at the geometric center of the supporting area.

15. The sound-emitting membrane layer according to claim 13, wherein: A plurality of second supporting structures are provided in at least a portion of the supporting area, and the plurality of second supporting structures are symmetrically distributed relative to a geometric center of the supporting area.

16. The sound-emitting membrane layer according to claim 12, wherein: A plurality of second supporting structures are provided around the first supporting structure, and the plurality of second supporting structures are arranged at intervals along the circumference of the first supporting structure.

17. The sound-emitting membrane layer according to claim 10, wherein: The sound-emitting membrane layer further comprises: A diaphragm layer, arranged on a side of the vibration electrode layer away from the fixed layer; a first conductive ring connected to a side of the vibration electrode layer facing the fixed layer, and extending along an edge of the vibration electrode layer; a second conductive ring connected to a side of the fixed electrode layer facing the vibration layer, and extending along an edge of the fixed electrode layer; The elastic double-sided adhesive is provided between the first conductive ring and the second conductive ring and is configured to separate the fixing layer and the vibration layer by a preset distance.

18. A display module, characterized in that: The device comprises a display panel and a sound-emitting membrane layer according to any one of claims 1 to 17.

19. The display module according to claim 18, wherein: The display panel has a light emitting surface, and the sound-emitting membrane layer is arranged on the light emitting surface of the display panel.

20. The display module according to claim 18, wherein: The sound-emitting membrane layer and the display panel are an integrally formed structure, or the sound-emitting membrane layer is adhered to the surface of the display panel.

21. The display module according to claim 18, wherein: The display panel is a liquid crystal display panel, which includes an array substrate, a color film substrate and a spacer. The array substrate and the color film substrate are arranged in a box, and the spacer is located between the array substrate and the color film substrate. The material of the first supporting structure and the second supporting structure of the sounding membrane layer is the same as the material of the spacer.

22. A display device, characterized in that: Comprising the display module according to any one of claims 18 to 21.

Images