Directional sound emitting component, manufacturing method thereof and display device

Abstract

The application provides a directional sound emitting assembly, a manufacturing method thereof and a display device. The directional sound emitting assembly comprises a first base film and a second base film arranged oppositely, a plurality of first support columns arranged at intervals, the first support columns being arranged between the first base film and the second base film, a plurality of second support columns arranged at intervals, the second support columns being arranged between the second base film and the first support columns, the first support columns and the second support columns corresponding to each other, and a projection of each first support column on the first base film and a projection of a second support column corresponding to the first support column on the first base film overlapping. Thus, by arranging the support columns on the first base film side and the second base film side respectively, the support height of the overall support columns can be improved, and the support capacity of the support columns can be improved, thereby effectively avoiding the reliability bubble problem. Meanwhile, the height of the unilateral support column can be reduced, which is beneficial to improving the uniformity of the support columns, thereby effectively improving the strip abnormality problem.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically, to directional sound-emitting components, their manufacturing methods, and display devices. Background Technology

[0002] With social development and the continuous improvement of people's living standards, display technology has gradually entered thousands of households, and consumer electronics products such as mobile phones, tablets, laptops, and e-readers are becoming increasingly integrated into people's work, study, and daily life. In public places, information leakage and interference are constant concerns. To address this issue, visual privacy technology has emerged, solving the problem of visual information leakage. However, there has been no substantial breakthrough in sound privacy and interference prevention, which urgently needs to be addressed.

[0003] Therefore, current directional sound-emitting components, their manufacturing methods, and display devices still need improvement. Summary of the Invention

[0004] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0005] Screen-based directional sound technology is currently in the verification stage. There are two technical approaches: one is to integrate a film onto the display screen, and the other is to use an external film. Both approaches have certain degrees of stripe defects and reliability issues (Not Good). The following focuses on the external film approach. This approach uses film as a substrate, on which electrode layers, conductive layers, insulating layers, and support structures are fabricated. Currently, this approach suffers from severe stripe defects and reliability bubbles. The specific reason is that the height of the support varies significantly in different areas, and the height of the support is limited. Exceeding the limit further worsens the height uniformity and makes it prone to detachment.

[0006] Through numerous experiments, the inventors discovered that support structures can be fabricated on one side of the substrate film and the diaphragm side respectively, increasing the overall support height and reducing the support height on one side, thereby improving the uniformity of the support and thus effectively improving technical problems such as strip defects and avoiding reliability bubbles to at least a certain extent.

[0007] The present invention aims to at least partially solve one of the technical problems in the related art.

[0008] In view of this, in one aspect of the present invention, a directional sound-generating component is proposed. According to an embodiment of the present invention, the directional sound-generating component includes: a first base membrane and a second base membrane disposed opposite to each other; a plurality of first support columns disposed at intervals between the first base membrane and the second base membrane; and a plurality of second support columns disposed at intervals between the second base membrane and the first support columns, wherein the first support columns and the second support columns correspond one-to-one, and the orthographic projection of each first support column on the first base membrane overlaps with the orthographic projection of the second support column corresponding to the first support column on the first base membrane. Thus, by providing support columns on both the first and second base membrane sides, the overall support height of the support columns can be increased, enhancing the support capacity of the support columns and effectively avoiding the reliability bubble problem; simultaneously, the height of the support columns on one side can be reduced, which is beneficial to improving the uniformity of the support columns and thus effectively improving the strip-shaped anomaly problem.

[0009] According to an embodiment of the present invention, the directional sound-generating component satisfies at least one of the following conditions: the height of the first support column is 8 μm to 10 μm; the interval between two adjacent first support columns is 0.5 mm to 2 mm; the height of the second support column is 5 μm to 8 μm; and the interval between two adjacent second support columns is 0.5 mm to 2 mm. This improves the overall support performance of the support columns, thereby enhancing the reliability of the directional sound-generating component.

[0010] According to an embodiment of the present invention, the first support column has a first top and a first bottom, the first bottom being disposed close to the first base membrane, and both the first top and the first bottom are elliptical. The second support column has a second top and a second bottom, the second bottom being disposed close to the second base membrane, and both the second top and the second bottom are elliptical. The first support column and the second support column corresponding to the first support column are intersecting. Therefore, the first support column and the second support column can cooperate well, which is beneficial for the component to produce directional sound.

[0011] According to an embodiment of the present invention, the major axis of the first bottom is 25μm to 35μm, the minor axis of the first bottom is 15μm to 25μm, the major axis of the first top is 20μm to 25μm, the minor axis of the first top is 10μm to 15μm, and / or, the major axis of the second bottom is 20μm to 30μm, the minor axis of the second bottom is 10μm to 20μm, the major axis of the second top is 15μm to 25μm, and the minor axis of the second top is 10μm to 15μm. Thus, both the first and second support columns are elliptical cylindrical structures, and the first and / or second support columns have suitable dimensions, which is beneficial for further improving the overall performance of the directional sound-generating component.

[0012] According to an embodiment of the present invention, the first support column has a first top and a first bottom, the first bottom being disposed close to the first base membrane, and both the first top and the first bottom are circular. The second support column has a second top and a second bottom, the second bottom being disposed close to the second base membrane, and both the second top and the second bottom are circular. The orthographic projection of the first top onto the first base membrane overlaps the orthographic projection of the second top onto the first base membrane. Therefore, as the second base membrane moves closer to the first base membrane, the first top of the first support column can provide good support for the second support column, thereby further improving the overall reliability of the directional sound-emitting assembly.

[0013] According to an embodiment of the present invention, the diameter of the first bottom is 20 μm to 35 μm, the diameter of the first top is 15 μm to 20 μm, and / or the diameter of the second bottom is 20 μm to 30 μm, and the diameter of the second top is 10 μm to 15 μm. Thus, the first support column and / or the second support column have suitable dimensions, which is beneficial for further improving the overall performance of the directional sound-generating assembly.

[0014] According to an embodiment of the present invention, the directional sound-generating component further includes: a first electrode layer disposed on one side surface of the first base film; a first conductive layer disposed on the edge region of the surface of the first electrode layer away from the first base film; a second electrode layer disposed on the surface of the second base film close to the first base film, and a plurality of second support pillars disposed on the surface of the second electrode layer away from the second base film; a second conductive layer disposed on the edge region of the surface of the second electrode layer away from the second base film; and a first insulating layer covering the surface of the second conductive layer away from the second base film. Thus, when powered on, applying voltage to the first electrode layer and the second electrode layer allows for uniform electrification of the entire electrode layer, which is beneficial for further improving the overall performance of the directional sound-generating component.

[0015] According to an embodiment of the present invention, the first support post is disposed on the surface of the first base film away from the first electrode layer; or, the directional sound-emitting component further includes a second insulating layer, the second insulating layer covering the surface of the first conductive layer away from the first base film and a portion of the surface of the first electrode layer, and a plurality of the first support posts are disposed on the surface of the second insulating layer away from the first base film. The first support post disposed on the surface of the first base film or the surface of the second insulating layer can provide good support, thereby improving the overall performance of the directional sound-emitting component.

[0016] According to an embodiment of the present invention, the directional sound-emitting component satisfies at least one of the following conditions: the first electrode layer and the second electrode layer each independently include at least one of an indium tin oxide film layer and a silver film layer; the sheet resistance of the first electrode layer and the sheet resistance of the second electrode layer are each independently less than or equal to 20Ω; the material forming the first conductive layer and the material forming the second conductive layer each independently include at least one of copper, silver, gold, and titanium; the diagonal line resistance of the first conductive layer and the diagonal line resistance of the second conductive layer are each independently less than or equal to 3Ω; the width of the first conductive layer and the width of the second conductive layer are each independently less than or equal to 1.5mm. The thicknesses of the first conductive layer and the second conductive layer are each independently 1 μm to 10 μm. The material forming the second insulating layer includes at least one of silicon nitride, silicon oxide, and silicon oxynitride. The second insulating layer includes an inorganic insulator layer and an organic insulator layer, wherein the organic insulator layer is disposed on the surface of the inorganic insulator layer away from the first electrode layer. The material forming the inorganic insulator layer includes at least one of silicon nitride, silicon oxide, and silicon oxynitride. The thickness of the inorganic insulator layer is 100 nm to 600 nm, and the thickness of the organic insulator layer is 3 μm to 10 μm. The breakdown voltage of the second insulating layer is greater than or equal to 400 V. This is beneficial for further improving the overall performance of the directional sound-generating component.

[0017] In another aspect of the present invention, a method for manufacturing the aforementioned directional sound-generating component is provided. According to an embodiment of the present invention, the method for manufacturing the aforementioned directional sound-generating component includes: forming a plurality of spaced-apart first support pillars on one side of a first base membrane; forming a plurality of spaced-apart second support pillars on one side of a second base membrane; arranging the first base membrane and the second base membrane opposite to each other, with the first support pillars disposed between the first base membrane and the second base membrane, and the second support pillars disposed between the second base membrane and the first support pillars, wherein the first support pillars and the second support pillars correspond one-to-one, and the orthographic projection of each first support pillar on the first base membrane overlaps with the orthographic projection of the second support pillar corresponding to the first support pillar on the first base membrane. Therefore, the directional sound-generating component manufactured using the above method possesses all the features and advantages of the aforementioned directional sound-generating component, which will not be elaborated further here.

[0018] According to an embodiment of the present invention, the step of forming a plurality of spaced-apart first support pillars includes: slit coating, exposure, and development; and / or, the step of forming a plurality of spaced-apart second support pillars includes: slit coating, exposure, and development. Therefore, the method described above for forming the first and / or second support pillars exhibits good process stability and high product yield.

[0019] According to an embodiment of the present invention, before forming the first support pillar, the method of fabricating the directional sound-emitting component further includes: forming a first electrode layer on one side surface of the first base film; forming a first conductive layer in an edge region of the surface of the first electrode layer away from the first base film; before forming the second support pillar, the method of fabricating the directional sound-emitting component further includes: forming a second electrode layer on one side surface of the second base film; forming a second conductive layer in an edge region of the surface of the second electrode layer away from the second base film; forming a first insulating layer on the side of the second conductive layer away from the second base film; and after forming the first insulating layer, forming a plurality of spaced-apart second support pillars on the surface of the second electrode layer away from the second base film. Thus, the resulting directional sound-emitting component has superior performance.

[0020] According to an embodiment of the present invention, after forming the first conductive layer, a plurality of spaced-apart first support pillars are formed on the surface of the first base film away from the first electrode layer; or, the method of manufacturing the directional sound-emitting component further includes: forming a second insulating layer on the side of the first conductive layer away from the first base film, such that the second insulating layer covers the surface of the first conductive layer away from the first base film and a portion of the surface of the first electrode layer away from the first base film; after forming the second insulating layer, a plurality of spaced-apart first support pillars are formed on the surface of the second insulating layer away from the first base film. This is beneficial for further improving the overall performance of the directional sound-emitting component.

[0021] According to embodiments of the present invention, the method for manufacturing the aforementioned directional sound-emitting component satisfies at least one of the following conditions: the first electrode layer is formed by sputtering at a sputtering temperature of less than or equal to 120°C; the second electrode layer is formed by sputtering at a sputtering temperature of less than or equal to 120°C; the first conductive layer is formed by sputtering at a sputtering temperature of less than or equal to 120°C; the second conductive layer is formed by sputtering at a sputtering temperature of less than or equal to 120°C; the second insulating layer comprises an inorganic insulator layer and an organic insulator layer, the organic insulator layer being disposed on the surface of the inorganic insulator layer away from the first electrode layer, the inorganic insulator layer being formed by sputtering at a sputtering temperature of less than or equal to 120°C, and the organic insulator layer being formed by slot coating. Using the above process conditions to form the film layer is beneficial for further improving the product yield.

[0022] In another aspect, the present invention provides a display device. According to an embodiment of the present invention, the display device includes: a display panel and the aforementioned directional sound-emitting component. Thus, the display device possesses all the features and advantages of the aforementioned directional sound-emitting component, which will not be repeated here. In general, the display device has good stability and reliability; the sound waves emitted by the display device have strong directionality, which can effectively achieve sound privacy and avoid causing sound interference to others. Attached Figure Description

[0023] Figure 1 A schematic diagram of a directional sound-emitting component according to an embodiment of the present invention is shown;

[0024] Figure 2 A schematic diagram of the structure of a directional sound-generating component in the related technology is shown;

[0025] Figure 3 The image shows a physical example of a directional sound-emitting component in the related technology that exhibits a reliability bubble.

[0026] Figure 4 The image shows a physical example of an abnormal stripe pattern in a directional sound-emitting component in the relevant technology;

[0027] Figure 5 A schematic diagram of a directional sound-emitting component according to another embodiment of the present invention is shown;

[0028] Figure 6 A schematic diagram of the structure of a directional sound-emitting component according to yet another embodiment of the present invention is shown;

[0029] Figure 7 A schematic diagram of the structure of a directional sound-emitting component according to yet another embodiment of the present invention is shown;

[0030] Figure 8 A schematic diagram of the structure of a directional sound-emitting component according to yet another embodiment of the present invention is shown;

[0031] Figure 9 A schematic diagram of the structure of a directional sound-emitting component according to yet another embodiment of the present invention is shown;

[0032] Figure 10 A schematic diagram of the structure of a directional sound-emitting component according to yet another embodiment of the present invention is shown;

[0033] Figure 11 A schematic diagram showing a first support column and a second support column intersecting according to an embodiment of the present invention is shown;

[0034] Figure 12 A schematic diagram of the structure of a first support column and a second support column according to an embodiment of the present invention is shown;

[0035] Figure 13 A schematic diagram of the structure of a first support column according to an embodiment of the present invention is shown;

[0036] Figure 14 The simulated sound pressure level curve as a function of frequency is displayed;

[0037] Figure 15 A schematic flowchart illustrating the fabrication process of a directional sound-emitting component according to an embodiment of the present invention is shown;

[0038] Figure 16 A schematic flowchart illustrating the fabrication of a directional sound-emitting component according to another embodiment of the present invention is shown;

[0039] Figure 17 A schematic diagram of a display device according to an embodiment of the present invention is shown;

[0040] Figure 18 A schematic diagram of a display device according to another embodiment of the present invention is shown;

[0041] Figure 19 A schematic diagram of the structure of a display device according to yet another embodiment of the present invention is shown;

[0042] Figure 20 A schematic diagram showing the positional relationship between the first support column, the second support column, and the black matrix according to an embodiment of the present invention is shown.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100: Directional sound-emitting component; 110: First base membrane; 120: Second base membrane; 130: First support column; 131: First bottom; 132: First top; 140: Second support column; 141: Second bottom; 142: Second top; 150: First electrode layer; 160: Second electrode layer; 170: Second insulating layer; 171: Inorganic insulator layer; 172: Organic insulator layer; 180: Support; 190: Insulating layer; 101: First conductive layer; 102: Second conductive layer; 103: First insulating layer; 104: First sealing adhesive; 200: Display panel; 210: Lower polarizer; 220: First substrate; 230: Thin film transistor; 240: Liquid crystal layer; 250: Color filter; 260: Black matrix; 270: Second substrate; 280: Upper polarizer; 290: Second sealing adhesive; 300: Optical transparent adhesive; 1: Reliability bubble. Detailed Implementation

[0045] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0046] In one aspect of the invention, a directional sound-emitting component is provided. According to an embodiment of the invention, reference is made to... Figure 1 , Figures 5 to 10 The directional sound-emitting component 100 may include a first base membrane 110 and a second base membrane 120 disposed opposite to each other, a plurality of first support columns 130 disposed at intervals, and a plurality of second support columns 140 disposed at intervals. The first support column 130 is disposed between the first base membrane 110 and the second base membrane 120, and the second support column 140 is disposed between the second base membrane 120 and the first support column 130. The first support column 130 and the second support column 140 correspond one-to-one. The orthographic projection of each first support column 130 on the first base membrane 110 overlaps with the orthographic projection of the second support column 140 corresponding to that first support column 130 on the first base membrane 110. Therefore, by setting the first support column and the second support column on the first base film side and the second base film side respectively, the overall support height of the first support column and the second support column can be increased, thereby increasing the cavity height between the first base film and the second base film, and thus avoiding the reliability bubble problem to some extent. By setting the first support column and the second support column, the height of the support column on one side can be reduced, and the uniformity of the first support column and the second support column can be improved, thereby effectively improving the strip-shaped abnormality problem. In addition, by setting the first support column and the second support column, the performance requirements of the first base film and the second base film can be appropriately reduced, which is conducive to reducing the manufacturing cost of the directional sound generation component.

[0047] The following describes in detail the reasons for the reliability bubble and strip-shaped anomalies in directional sound-generating components in related technologies, and the principle by which the technical solution of the present invention can avoid the reliability bubble problem and improve the strip-shaped anomaly:

[0048] Figure 2 This diagram illustrates the structure of a directional sound-generating component in the related technology. Figure 2As can be seen, an insulating layer 190 is provided on one side of the first base film 110, and multiple spaced supports 180 are provided on the surface of the insulating layer 190 away from the first base film 110. With supports 180 only provided on the first base film side, the support height of the supports 180 is limited, and the cavity height H0 between the first base film 110 and the second base film 120 is also relatively low. Under reliable high-temperature conditions, the second base film 120 (diaphragm) will thermally expand when the temperature rises, causing a decrease in diaphragm tension. Under a constant bias voltage, the diaphragm approaches the first base film 110 under the action of electrostatic attraction. When the distance between the diaphragm and the first base film 110 is less than the recoverable critical value, the diaphragm will be attracted and completely adhered to the insulating layer 190. When the diaphragm is completely adhered to the insulating layer 190, the diaphragm is overstretched, resulting in irreversible plastic deformation, ultimately exhibiting a reliability bubble phenomenon, such as... Figure 3 As shown, a reliability bubble 1 appears in the directional sound-generating component. Furthermore, to increase the support height of the support 180, a support of considerable height is typically formed during manufacturing. However, this can easily lead to poor uniformity in support height, meaning that some areas may have supports that are significantly shorter than intended. Under a constant bias voltage, the electrostatic force on the diaphragm is uniform. When a local support is shorter than intended, its support capacity is insufficient, causing the distance between the diaphragm and the first base membrane in that area to become shorter. This results in a lower cavity height between the diaphragm and the first base membrane, which manifests as a strip-like collapse under reflected light. Figure 4 As shown, the directional sound-emitting component exhibits a strip-shaped abnormality.

[0049] According to an embodiment of the present invention, reference Figure 1 , Figures 5 to 10 A first support column 130 and a second support column 140 are respectively provided on the first base film side and the second base film side, relative to Figure 2 The technical solution of this invention includes two layers of support columns. The sum of the heights of the two layers of support columns is significantly higher than the height of a single support column, thereby effectively increasing the overall support height of the support columns. The cavity height between the first base film and the second base film can be increased accordingly, thus avoiding the reliability bubble problem. Furthermore, since two layers of support columns are provided, the height of each layer of support columns can be relatively reduced, and the uniformity of each layer of support columns will be better, thereby avoiding strip-shaped abnormal phenomena.

[0050] According to some embodiments of the present invention, reference Figure 1 , Figure 5 , Figure 8 , Figure 9 and Figure 11The first support column 130 and the second support column 140 can both be elliptical cylindrical structures. The first support column 130 has a first top 132 and a first bottom 131, with the first bottom 131 positioned close to the first base film 110. Both the first top 132 and the first bottom 131 are elliptical. The second support column 140 has a second top 142 and a second bottom 141, with the second bottom 141 positioned close to the second base film 120. Both the second top 142 and the second bottom 141 are elliptical. The first support column 130 and the corresponding second support column 140 are arranged intersectingly. It should be noted that, referring to... Figure 1 , Figure 5 , Figure 8 , Figure 9 and Figure 11 The cross arrangement means that the first support column 130 and the second support column 140 are arranged in an "X" shape or a "cross" shape, and the angle between the orthographic projection of the first top 132 of the first support column 130 on the first base film 110 and the orthographic projection of the second top 142 of the second support column 140 on the first base film 110 is an acute angle or a right angle.

[0051] According to some specific embodiments of the present invention, reference is made to Figure 1 , Figure 8 and Figure 9 The top and bottom dimensions of the first support column 130 are the same, and the top and bottom dimensions of the second support column 140 are the same. That is to say, the first top and the first bottom dimensions of the first support column are the same, and the second top and the second bottom dimensions of the second support column are the same. The cross-sections of the first support column and the second support column along the height direction are both rectangular.

[0052] According to other specific embodiments of the present invention, reference is made to Figure 5 The dimensions of the first top and the first bottom of the first support column 130 are different, and the dimensions of the second top and the second bottom of the second support column 140 are different. The cross-sections of the first support column and the second support column along the height direction are both trapezoidal.

[0053] According to some embodiments of the present invention, reference Figure 1 , Figures 5 to 10 The height H1 of the first support column 130 can be 8μm to 10μm. For example, the height H1 of the first support column 130 can be 8μm, 8.5μm, 9μm, 9.5μm, 10μm, etc. Therefore, the first support column has a relatively high height and good support performance.

[0054] According to some embodiments of the present invention, reference Figure 1 , Figures 5 to 10The interval d1 between two adjacent first support columns 130 can be 0.5mm to 2mm, for example, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 1.7mm, 2mm, etc. Therefore, a suitable interval between the first support columns is beneficial to improving the overall performance of the directional sound-generating component. It should be noted that when the cross-section of the first support column along the height direction is trapezoidal, the interval between two adjacent first support columns refers to the interval between the first bottoms of the two adjacent first support columns.

[0055] According to some embodiments of the present invention, reference Figure 1 , Figures 5 to 10 The height H2 of the second support column 140 can be 5μm to 8μm. For example, the height H2 of the second support column 140 can be 5μm, 6μm, 7μm, 8μm, etc. Thus, the second support column has a suitable height and good uniformity, which is more conducive to improving the strip-shaped abnormality problem. In addition, the second support column also has good stability when the second base film vibrates and is not easy to fall off.

[0056] According to some embodiments of the present invention, reference Figure 1 , Figures 5 to 10 The interval between two adjacent second support columns 140 can be 0.5mm to 2mm. For example, the interval between two adjacent second support columns 140 can be 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 1.7mm, 2mm, etc. Therefore, a suitable interval between the second support columns is more conducive to improving the overall performance of the directional sound-generating component. It should be noted that when the cross-section of the second support column along the height direction is trapezoidal, the interval between two adjacent second support columns refers to the interval between the second bottoms of the two adjacent second support columns.

[0057] According to some embodiments of the present invention, reference Figure 5 and Figure 13The first top 132 and the first bottom 131 of the first support column 130 are both elliptical. The cross-section of the first support column 130 along the height direction is trapezoidal. The major axis of the first bottom 131 can be 25μm to 35μm. For example, the major axis L1 of the first bottom 131 can be 25μm, 27μm, 30μm, 32μm, 35μm, etc. The minor axis L2 of the first bottom 131 can be 15μm to 25μm. For example, the minor axis L2 of the first bottom 131 can be 15μm. The first top 132 can have a major axis length L3 of 20μm to 25μm, such as 18μm, 20μm, 22μm, 24μm, 25μm, etc. The minor axis length L4 of the first top 132 can be 10μm to 15μm, such as 10μm, 11μm, 12μm, 13μm, 14μm, 15μm, etc. Therefore, the first support column has suitable dimensions, providing good support performance, and it also has good stability, which is beneficial for further improving the overall stability of the directional sound-generating component.

[0058] According to some specific embodiments of the present invention, reference is made to Figure 5 The second top 142 and the second bottom 141 of the second support column 140 are both elliptical. The cross-section of the second support column 140 along the height direction is trapezoidal. The major axis of the second bottom 141 can be 20μm to 30μm, for example, 20μm, 23μm, 25μm, 28μm, 30μm, etc. The minor axis of the second bottom 141 can be 10μm to 20μm, for example, 10μm. The second top 142 can have a major axis length of 15μm to 25μm, for example, 15μm, 18μm, 20μm, 22μm, 25μm, etc., and a minor axis length of 10μm to 15μm, for example, 10μm, 11μm, 12μm, 13μm, 14μm, 15μm, etc. Therefore, the second support column has suitable dimensions, which is beneficial to further improving the overall performance of the directional sound-generating component.

[0059] According to other embodiments of the present invention, reference is made to Figure 6 , Figure 7 , Figure 10 and Figure 12The first support column 130 and the second support column 140 can both be cylindrical structures. The first support column 130 has a first top 132 and a first bottom 131, with the first bottom 131 positioned close to the first base membrane 110. Both the first top 132 and the first bottom 131 are circular. The second support column 140 has a second top 142 and a second bottom 141, with the second bottom 141 positioned close to the second base membrane 140. Both the second top 142 and the second bottom 141 are circular. The orthographic projection of the first top 132 onto the first base membrane 110 overlaps the orthographic projection of the second top 142 onto the first base membrane 110. This configuration also allows the directional sound-emitting component to have better overall performance. It should be noted that... Figure 12 The image is only meant to show the approximate positional relationship between the second support column and the first support column when the second base membrane vibrates. When the directional sound-emitting component is not powered on, there is a certain gap between the first support column and the second support column. Of course, when the second base membrane vibrates, the second top of the second support column and the first top of the first support column can be in contact or have a certain gap, as long as normal sound can be emitted.

[0060] According to some specific embodiments of the present invention, reference is made to Figure 6 , Figure 10 and Figure 12 Both the first support column 130 and the second support column 140 are cylindrical structures. The cross-sections of the first support column 130 and the second support column 140 along the height direction are rectangular. That is to say, the first top 132 and the first bottom 131 of the first support column 130 have the same dimensions and the same diameter. The second top 142 and the second bottom 141 of the second support column 140 have the same dimensions and the same diameter.

[0061] According to other specific embodiments of the present invention, reference is made to Figure 7 The first support column 130 is a cylindrical structure with a trapezoidal cross-section along its height. The first top 132 and the first bottom 131 have different dimensions. The diameter of the first bottom 131 can be 20μm to 35μm, for example, 20μm, 23μm, 25μm, 27μm, 30μm, 33μm, 35μm, etc. The diameter of the first top 132 can be 15μm to 20μm, for example, 15μm, 16μm, 18μm, 20μm, etc. Therefore, the first support column has suitable dimensions, which is beneficial to further improving the overall performance of the directional sound-generating component.

[0062] According to some specific embodiments of the present invention, reference is made to Figure 7The second support column 140 is a cylindrical structure with a trapezoidal cross-section along its height. The second top 142 and the second bottom 141 have different dimensions. The diameter of the second bottom 141 can be 20μm to 30μm, for example, 20μm, 23μm, 25μm, 28μm, 30μm, etc. The diameter of the second top 142 can be 10μm to 15μm, for example, 10μm, 12μm, 13μm, 15μm, etc. Therefore, the second support column has suitable dimensions, which is beneficial to further improving the overall performance of the directional sound-generating component.

[0063] According to some embodiments of the present invention, reference Figure 1 , Figures 5 to 10 The directional sound-emitting component 100 may further include a first electrode layer 150, a first conductive layer 101, a second electrode layer 160, a second conductive layer 102, and a first insulating layer 103. The first electrode layer 150 is disposed on one side surface of the first base film 110, the first conductive layer 101 is disposed on the edge region of the surface of the first electrode layer 150 away from the first base film 110, the second electrode layer 160 is disposed on the surface of the second base film 120 close to the first base film 110, a plurality of second support pillars 140 are disposed on the surface of the second electrode layer 160 away from the second base film 120, the second conductive layer 102 is disposed on the edge region of the surface of the second electrode layer 160 away from the second base film 120, and the first insulating layer 103 covers the surface of the second conductive layer 102 away from the second base film 120. Therefore, by applying voltage to the first electrode layer and the second electrode layer, an electric field is generated between the first electrode layer and the second electrode layer. The second base film will vibrate under the action of Coulomb force, thereby generating ultrasonic waves. The ultrasonic waves are emitted by the directional sound generation component and have strong directivity, thus realizing directional sound generation. The arrangement of the first conductive layer and the second conductive layer can make the first electrode layer and the second electrode layer more uniformly charged, and the voltage drop at the near end and the far end is smaller, thereby further improving the overall performance of the directional sound generation component.

[0064] According to an embodiment of the present invention, reference Figure 1 , Figures 5 to 10 The directional sound-emitting component 100 may further include a first sealing adhesive 104, which is used to bond and encapsulate the structure on the first base film side and the structure on the second base film side, so that the first base film and the second base film are disposed opposite to each other.

[0065] According to some embodiments of the present invention, reference Figure 1 , Figures 5 to 7 The first support pillar 130 can be disposed on the surface of the first base film 110 away from the first electrode layer 150. Thus, the first base film can provide support for the first support pillar, facilitating the fabrication of the first support pillar.

[0066] According to other embodiments of the present invention, reference is made to Figures 8 to 10 The directional sound-emitting component 100 may further include a second insulating layer 170, which covers the surface of the first conductive layer 101 away from the first base film 110 and a portion of the surface of the first electrode layer 150 away from the first base film 110. A plurality of first support pillars 130 are disposed on the surface of the second insulating layer 170 away from the first base film 110. Thus, the second insulating layer can prevent direct contact between the electrodes, which is more conducive to improving the overall reliability of the directional sound-emitting component.

[0067] According to embodiments of the present invention, the first electrode layer 150 and the second electrode layer 160 may each independently comprise at least one of an indium tin oxide (ITO) film layer and a silver film layer. Thus, both the first electrode layer and the second electrode layer possess good conductivity, which is beneficial for improving the performance of the directional sound-generating component. According to some embodiments of the present invention, the first electrode layer 150 and the second electrode layer 160 may each independently comprise a silver film layer (thickness can be 1 nm to 5 nm) or an ITO film layer (thickness can be approximately 100 nm). According to other embodiments of the present invention, the first electrode layer 150 and the second electrode layer 160 may each independently comprise an ITO film layer (thickness approximately 25 nm), a silver film layer (thickness approximately 10 nm), and an ITO film layer (thickness approximately 25 nm) stacked sequentially.

[0068] According to an embodiment of the present invention, the sheet resistance of the first electrode layer 150 and the sheet resistance of the second electrode layer 160 can each be less than or equal to 20Ω. The smaller the sheet resistance of the electrode layer, the better the conductivity of the electrode layer, the better the voltage uniformity between the far end and near end of the electrode layer, the more consistent the vibration amplitude in different regions, and the higher the audible sound pressure level.

[0069] According to embodiments of the present invention, the materials forming the first conductive layer 101 and the second conductive layer 102 can each independently include at least one of copper, silver, gold, and titanium. Thus, both the first and second conductive layers have good conductivity. The fact that the first and second conductive layers are respectively disposed at the edge regions of the first and second electrode layers can improve the conductivity uniformity of the first and second electrode layers, resulting in better voltage uniformity at both the distal and proximal ends of the first and second electrode layers. According to some embodiments of the present invention, the material forming the first conductive layer 101 can be silver, copper, or silver paste, and the material forming the second conductive layer 102 can be silver, copper, or silver paste, thereby reducing manufacturing costs. According to other embodiments of the present invention, the material forming the first conductive layer 101 can be a copper-silver alloy, and the material forming the second conductive layer 102 can be a copper-silver alloy.

[0070] According to an embodiment of the present invention, the diagonal resistance of the first conductive layer 101 and the diagonal resistance of the second conductive layer 102 can each be less than or equal to 3Ω. The first conductive layer and the second conductive layer have low resistance and good conductivity, which is beneficial to further improve the uniformity of the voltage applied to the first electrode layer and the second electrode layer, thereby further improving the overall performance of the directional sound generation component.

[0071] According to an embodiment of the present invention, the width of the first conductive layer 101 and the width of the second conductive layer 102 can each be less than or equal to 1.5 mm. Thus, the width of the first conductive layer and the second conductive layer is small, which is beneficial to reduce the bezel. After the directional sound-emitting component is applied to the display device, the bezel of the display device is narrower, which can meet the user's need for a narrow bezel.

[0072] According to an embodiment of the present invention, the thickness of the first conductive layer 101 and the thickness of the second conductive layer 102 can each be independently 1μm to 10μm. For example, the thickness of the first conductive layer 101 can be 1μm, 2μm, 5μm, 7μm, 10μm, etc., and the thickness of the second conductive layer 102 can be 1μm, 3μm, 5μm, 8μm, 10μm, etc. While meeting the diagonal resistance, the thickness of the first conductive layer and the second conductive layer can be reduced as much as possible, which is beneficial to reducing the step difference between the display area and the peripheral area of ​​the display device.

[0073] According to some embodiments of the present invention, the material forming the second insulating layer 170 may include at least one of silicon nitride, silicon oxide, and silicon oxynitride. Thus, the second insulating layer can be formed from the aforementioned inorganic materials, which possess good insulation properties and have a high dielectric constant and a high breakdown voltage, thereby contributing to improved overall performance of the directional sound-generating component. According to some specific embodiments of the present invention, the second insulating layer 170 may be formed solely from silicon nitride, silicon oxide, or silicon oxynitride.

[0074] According to other embodiments of the present invention, reference is made to Figure 9 and Figure 10The second insulating layer 170 may include an inorganic insulator layer 171 and an organic insulator layer 172. The organic insulator layer 172 is disposed on the surface of the inorganic insulator layer 171 away from the first electrode layer 150. The material forming the inorganic insulator layer 171 may include at least one of silicon nitride, silicon oxide, and silicon oxynitride. The thickness of the inorganic insulator layer 171 may be 100 nm to 600 nm, for example, the thickness of the inorganic insulator layer 171 may be 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, etc. The thickness of the organic insulator layer 172 may be... The thickness can be 3μm to 10μm. For example, the thickness of the organic insulator layer 172 can be 3μm, 5μm, 6μm, 8μm, 10μm, etc. Therefore, by combining inorganic and organic materials to form the second insulating layer, not only can the breakdown voltage of the second insulating layer be improved, but the stress of the membrane material can also be reduced to prevent membrane material rupture, thereby improving the stability of the directional sound generation component and extending the service life of the directional sound generation component. Furthermore, the appropriate thickness of the first and second insulating layers is beneficial to further improving the breakdown voltage of the second insulating layer, thereby further improving the overall performance of the directional sound generation component.

[0075] According to some embodiments of the present invention, the breakdown voltage of the second insulating layer 170 can be greater than or equal to 400V, thereby further improving the reliability of the directional sound-generating component and helping to extend the service life of the directional sound-generating component.

[0076] According to embodiments of the present invention, the material forming the first insulating layer 103 may include at least one of organic insulating materials and inorganic insulating materials. Therefore, the first insulating layer has good insulation properties and a high breakdown voltage. According to some embodiments of the present invention, the material forming the first insulating layer may also include at least one of silicon nitride, silicon oxide, and silicon oxynitride.

[0077] In another aspect, the present invention provides a method for manufacturing the aforementioned directional sound-generating component. According to an embodiment of the present invention, the method for manufacturing the aforementioned directional sound-generating component may include the following steps:

[0078] S100: A plurality of spaced first support columns are formed on one side of the first base film.

[0079] In this step, a plurality of spaced first support columns 130 are formed on one side of the first base film 110. The shape, size, and spacing between adjacent first support columns have been described in detail above and will not be repeated here.

[0080] According to some embodiments of the present invention, the step of forming a plurality of spaced first support columns 130 may include slit coating, exposure and development, etc. Compared with the technical solution of forming the support only on the side of the first base film, the height of the first support column in the present invention can be reduced. The first support column is manufactured by the above process, which has high yield and good uniformity. The error in the height direction can be reduced from ±1μm to ±0.10μm to ±0.15μm, thereby effectively avoiding the occurrence of strip-shaped abnormality. In addition, the first support column is not easy to fall off, which is beneficial to improving the stability of the directional sound generation component.

[0081] According to some embodiments of the present invention, multiple spaced first support columns can also be formed using screen printing. Compared with the technical solution of forming the support only on the side of the first base film, the height of the first support column in the present invention can be reduced. The screen printing process for making the first support column can reduce the error in the height direction of the support column from ±3μm to ±0.10μm. The first support column has good uniformity, thereby effectively avoiding the problem of strip-shaped abnormalities.

[0082] Before fabricating directional sound-generating components, software simulations can be used to determine the optimal technical solution. First, simulation software such as Comsol Multiphysics can be used to determine the range of parameters for each layer in the directional sound-generating component design, outputting the overall technical solution and expected effects. Next, the geometric dimensions of the membrane material, insulation layer, and support pillars, including thickness, length, width, and radius, are input into the simulation. Material parameters for the membrane material, support pillars, and insulation layer, including coefficient of thermal expansion, Young's modulus, Poisson's ratio, density, and dielectric constant, are also input, and a voltage is applied. Finally, the simulation outputs the frequency response curve of the ultrasound, such as... Figure 14 The sound pressure level versus bandwidth curve is described. Based on these characteristic parameters, the input values ​​are continuously optimized to determine the optimal solution. Among these, the following points are considered for the support column parameters: the top, bottom, and height of the support column need to consider the manufacturing process capabilities and the shielding ability of the black matrix. If the top or bottom dimensions of the support column are too small, or the height is too high, it may lead to support column collapse or peeling, and a decrease in support column uniformity. If the top or bottom dimensions are too large, the black matrix may not form effective shielding, resulting in a pitted appearance. The height and spacing of the support columns have a certain impact on the audible sound pressure level. The larger the support column height and spacing, the larger the amplitude of a single vibrating unit, and the higher the sound pressure level. It is also necessary to comprehensively consider the performance and reliability of the membrane material to avoid problems such as loss of membrane shape and device malfunction due to excessive amplitude and sound pressure level.

[0083] According to some embodiments of the present invention, reference Figure 15 and Figure 16Before forming the first support post 130, the method of manufacturing the directional sound-emitting component may further include the following steps: forming a first electrode layer 150 on one side surface of the first base film 110; forming a first conductive layer 101 in the edge region of the first electrode layer 150 away from the surface of the first base film 110.

[0084] According to some embodiments of the present invention, the first electrode layer 150 can be formed by sputtering at a temperature of 120°C or less. Forming the first electrode layer using a low-temperature sputtering process results in an electrode layer with uniform composition and thickness, giving it good voltage consistency and thus improving the overall performance of the directional sound-generating component. According to some specific embodiments of the present invention, an ITO electrode layer can be formed on one side surface of the first base film 110 using a low-temperature sputtering process, serving as the first electrode layer. According to other specific embodiments of the present invention, an ITO film layer, a silver film layer, and another ITO film layer can be sequentially formed on one side surface of the first base film 110 using a low-temperature sputtering process, serving as the first electrode layer. According to yet another specific embodiment of the present invention, a silver film layer can be formed on one side surface of the first base film 110 using a low-temperature sputtering process, serving as the first electrode layer.

[0085] According to some embodiments of the present invention, the first conductive layer 101 can be formed by sputtering at a temperature of 120°C or less. This allows the first conductive layer to be formed in the edge region of the first electrode layer using a low-temperature sputtering process. This process is mature and beneficial for improving product yield. Furthermore, using this process to form the first conductive layer allows for better control of its width and thickness, thereby further improving the overall performance of the directional sound-generating component. According to some embodiments of the present invention, a copper film layer, a silver film layer, or a copper-silver alloy film layer can be formed in the edge region of the first electrode layer using a low-temperature sputtering process as the first conductive layer.

[0086] According to some embodiments of the present invention, reference Figure 15 After the first conductive layer 101 is formed, a plurality of spaced first support pillars 130 are formed on the surface of the first base film 110 away from the first electrode layer 150.

[0087] According to other embodiments of the present invention, reference is made to Figure 16The method for manufacturing a directional sound-emitting component may further include: forming a second insulating layer 170 on the side of the first conductive layer 101 away from the first base film 110, such that the second insulating layer 170 covers the surface of the first conductive layer 101 away from the first base film 110 and a portion of the surface of the first electrode layer 150 away from the first base film 110; after forming the second insulating layer 170, forming a plurality of spaced-apart first support pillars 130 on the surface of the second insulating layer 170 away from the first base film 110. Thus, the second insulating layer can provide insulation protection for the first conductive layer and the first electrode layer, and can also provide some support for the first support pillars.

[0088] According to other embodiments of the present invention, the second insulating layer 170 can be an inorganic insulating layer, which can be formed by sputtering at a sputtering temperature of less than or equal to 120°C. Thus, the insulating layer formed by the above process has a uniform thickness and uniform composition, which is beneficial for improving process yield. According to embodiments of the present invention, a silicon nitride film, a silicon oxide film, or a silicon oxynitride film can be formed by sputtering as the second insulating layer.

[0089] According to other embodiments of the present invention, reference is made to Figure 16 The second insulating layer 170 may include an inorganic insulator layer 171 and an organic insulator layer 172. The organic insulator layer 172 is disposed on the surface of the inorganic insulator layer 171 away from the first electrode layer 150. The inorganic insulator layer 171 may be formed by sputtering process, and the sputtering temperature may be less than or equal to 120°C. The organic insulator layer may be formed by slot coating process. Thus, the second insulating layer can be formed using mature manufacturing processes, which is beneficial to improving product yield and reducing manufacturing costs.

[0090] S200: Multiple spaced second support columns are formed on one side of the second base film.

[0091] According to an embodiment of the present invention, a plurality of spaced second support columns 140 are formed on one side of the second base film 120. The shape, size, and spacing between adjacent second support columns 140 have been described in detail above and will not be repeated here.

[0092] According to some embodiments of the present invention, the step of forming a plurality of spaced second support pillars 140 may include slit coating, exposure and development, etc. In the present invention, the height of the second support pillars can be reduced compared to the technical solution of forming the support only on the side of the first base film. The second support pillars are fabricated using the above process, which has a high yield and good uniformity of the second support pillars. The error in the height direction can be reduced from ±1μm to ±0.10μm to ±0.15μm, thereby effectively avoiding the occurrence of stripe-like abnormalities.

[0093] According to some embodiments of the present invention, a screen printing process can also be used to form multiple spaced second support columns. Compared with the technical solution of forming the support only on the side of the first base film, the height of the second support column in the present invention can be reduced. The screen printing process for making the second support column can reduce the error in the height direction of the support column from ±3μm to ±0.10μm. The second support column has better uniformity, thereby effectively avoiding the problem of strip-shaped abnormalities.

[0094] According to some embodiments of the present invention, before forming the second support pillars 140, the method for fabricating the directional sound-emitting assembly may further include the following steps: forming a second electrode layer 160 on one side surface of the second base film 120; forming a second conductive layer 102 in an edge region of the surface of the second electrode layer 160 away from the second base film 120; and forming a first insulating layer 103 on the side of the second conductive layer 102 away from the second base film 120, the first insulating layer 103 covering the surface of the second conductive layer 102 away from the second electrode layer. According to some embodiments of the present invention, after forming the first insulating layer 103, a plurality of spaced-apart second support pillars 140 are formed on the surface of the second electrode layer 160 away from the second base film 120.

[0095] According to some embodiments of the present invention, the second electrode layer 160 can be formed by sputtering at a temperature of 120°C or less. Forming the second electrode layer using a low-temperature sputtering process results in an electrode layer with uniform composition and thickness, giving it good voltage consistency and thus improving the overall performance of the directional sound-generating component. According to some specific embodiments of the present invention, an ITO electrode layer can be formed on one side surface of the second base film 120 using a low-temperature sputtering process. According to other specific embodiments of the present invention, an ITO film layer, a silver film layer, and another ITO film layer can be sequentially formed on one side surface of the second base film 120 using a low-temperature sputtering process, serving as the second electrode layer. According to yet another specific embodiment of the present invention, a silver film layer can be formed on one side surface of the second base film using a low-temperature sputtering process, serving as the second electrode layer.

[0096] According to some embodiments of the present invention, the second conductive layer 102 can be formed by sputtering at a temperature of 120°C or less. This allows for the formation of the second conductive layer in the edge region of the second electrode layer using a low-temperature sputtering process. This process is mature and beneficial for improving product yield. Furthermore, using this process to form the second conductive layer allows for better control of its width and thickness, thereby further improving the overall performance of the directional sound-generating component. The material, resistance, width, and thickness parameters of the second conductive layer 102 have been described in detail above and will not be repeated here.

[0097] S300: The first base film and the second base film are positioned opposite each other.

[0098] According to an embodiment of the present invention, reference Figure 15 and Figure 16 After forming the first support column 130 and the second support column 140, the first base membrane 110 and the second base membrane 120 are arranged opposite to each other. The first support column 130 is positioned between the first base membrane 110 and the second base membrane 120, and the second support column 140 is positioned between the second base membrane 120 and the first support column 130. The first support column 130 and the second support column 140 correspond one-to-one, and the orthographic projection of each first support column 130 on the first base membrane 110 overlaps with the orthographic projection of the corresponding second support column 140 on the first base membrane 110. Therefore, the directional sound-emitting component manufactured using the above method possesses all the features and advantages of the aforementioned directional sound-emitting component, which will not be repeated here. In summary, this directional sound-emitting component has good stability and directional sound-emitting function, can achieve sound privacy protection, and avoids sound interference to others caused by the use of the directional sound-emitting component.

[0099] The manufacturing steps of the directional sound-emitting component 100 are described in detail below according to some specific embodiments of the present invention:

[0100] According to some embodiments of the present invention, reference Figure 15 A first electrode layer 150 is formed on one side surface of the first base film 110, and a first conductive layer 101 is formed in the edge region of the first electrode layer 150 away from the first base film 110. Then, a plurality of spaced first support pillars 130 are formed on the surface of the first base film 110 away from the first electrode layer 150. A second electrode layer 160 is formed on one side surface of the second base film 120, and a second conductive layer 102 is formed in the edge region of the second electrode layer 160 away from the second base film 120. A first insulating layer 103 is formed on the side of the second conductive layer 102 away from the second base film 120, and the first insulating layer 103 covers the surface of the second conductive layer 102 away from the second base film 120. Then, a plurality of spaced second support pillars 140 are formed on the surface of the second electrode layer 160 away from the second base film 120. The first base film 110 and the second base film 120 are arranged opposite to each other. Then, a first sealing adhesive 104 is filled to bond and encapsulate the structures on the first base film side and the structures on the second base film side, thereby obtaining a directional sound-emitting component 100.

[0101] According to other embodiments of the present invention, reference is made to Figure 16A first electrode layer 150 is formed on one side surface of the first base film 110. A first conductive layer 101 is formed in the edge region of the first electrode layer 150 away from the first base film 110. A second insulating layer 170 is formed on the side of the first electrode layer 150 away from the first base film 110, covering the surface of the first conductive layer 101 away from the first base film 110 and a portion of the surface of the first electrode layer 150 away from the first base film 110. Then, a plurality of spaced-apart first support pillars 130 are formed on the surface of the second insulating layer 170 away from the first base film. A second electrode layer 160 is formed on one side surface of the second base film 120. A second conductive layer 102 is formed on the edge region of the second electrode layer 160 away from the surface of the second base film 120. A first insulating layer 103 is formed on the side of the second conductive layer 102 away from the second base film 120, and the first insulating layer 103 covers the surface of the second conductive layer 102 away from the second base film 120. Then, a plurality of spaced second support pillars 140 are formed on the surface of the second electrode layer 160 away from the second base film 120. The first base film 110 and the second base film 120 are arranged opposite to each other. Then, a first sealing adhesive 104 is filled to bond and encapsulate the structure on the first base film side and the structure on the second base film side to obtain the directional sound-emitting component 100.

[0102] Those skilled in the art should understand that after forming the directional sound-emitting component, a bonding process for the directional sound-emitting component may be included to form an FOC device (FPC On Gate, a device with driving circuitry). The specific bonding process is not particularly limited in this invention, and those skilled in the art can design it according to the actual situation.

[0103] In another aspect, the present invention provides a display device. According to an embodiment of the invention, reference is made to... Figures 17 to 19 The display device may include a display panel 200 and the aforementioned directional sound-emitting component 100. Therefore, this display device possesses all the features and advantages of the aforementioned directional sound-emitting component, which will not be repeated here. In summary, this display device has a sound privacy function and can also avoid causing sound interference to others.

[0104] According to some embodiments of the present invention, reference Figures 17 to 19 The display panel 200 and the directional sound-emitting component 100 can be bonded together using optically transparent adhesive 300. According to an embodiment of the present invention, the display panel 200 and the directional sound-emitting component 100 are bonded together using optically transparent adhesive 300. During this bonding process, a tensioning fixture can be used to ensure that the film material is stretched and flattened. Afterwards, driving hardware can be connected and algorithms integrated to enable the display device to emit sound and display normally.

[0105] According to some embodiments of the present invention, reference Figures 17 to 19The display panel 200 may include a lower polarizer 210, a first substrate 220, a thin-film transistor 230, a liquid crystal layer 240, a color filter 250, a black matrix 260, a second substrate 270, an upper polarizer 280, and a second sealant 290. Those skilled in the art should understand that the color filter 250 may include sub-color filter layers of different colors for color display. According to some embodiments of the present invention, the first substrate 220 and the second substrate 270 may both be glass substrates to provide good support. The specific composition of the second sealant 290 is not particularly limited in this invention, and those skilled in the art can select it according to actual conditions.

[0106] According to some embodiments of the present invention, reference Figure 20 In the display device, the orthographic projection of the black matrix 260 on the first substrate 220 can cover the orthographic projections of the first support pillar 130 and the second support pillar 140 on the first substrate 220. Therefore, the first and second support pillars are located in the area where the black matrix is ​​located in the display area, and the arrangement of the first and second support pillars will not adversely affect the normal display of the display panel (e.g., the appearance of dot-like defects in the support pillars under transmitted light). In this invention, the spacing between the first and second support pillars is at the millimeter level, while conventional pixel sizes are at the micrometer level. When setting the first and second support pillars, the spacing between the support pillars can be adjusted according to the size of different pixels, making the spacing between the support pillars an integer multiple of the pixel size, so that the orthographic projection of the support pillars on the first substrate falls within the orthographic projection range of the black matrix on the first substrate.

[0107] According to embodiments of the present invention, there are no special requirements for the specific type of the display device described above. Those skilled in the art can flexibly select according to actual needs, such as display devices such as mobile phones, iPads, and laptops.

[0108] Those skilled in the art will understand that, in addition to the display panel and directional sound-emitting components described above, the display device also has the necessary structures and components of a conventional display device. Taking a mobile phone as an example, in addition to the display panel and directional sound-emitting components described above, it also includes the necessary structures and components such as the battery back cover, the mid-frame, the touch panel, and the motherboard.

[0109] The terms "first" and "second" used in this document are 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 of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0110] In the description of this specification, the references to terms such as "one embodiment," "another embodiment," "yet another embodiment," "some embodiments," "other embodiments," "some specific embodiments," or "other specific embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0111] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A directional sound-emitting component, characterized in that, include: The first base film and the second base film are set relative to each other; Multiple spaced-apart first support columns are disposed between the first base film and the second base film; Multiple second support columns are spaced apart and disposed between the second base film and the first support column. The first support column and the second support column correspond one-to-one. The orthographic projection of each first support column on the first base film overlaps with the orthographic projection of the second support column corresponding to the first support column on the first base film. The height of the first support column is 8μm~10μm; The height of the second support column is 5μm~8μm.

2. The directional sound-emitting component according to claim 1, characterized in that, At least one of the following conditions must be met: The interval between two adjacent first support columns is 0.5mm to 2mm; The interval between two adjacent second support columns is 0.5mm to 2mm.

3. The directional sound-emitting component according to claim 2, characterized in that, The first support column has a first top and a first bottom, with the first bottom disposed close to the first base film. Both the first top and the first bottom are elliptical in shape. The second support column has a second top and a second bottom, with the second bottom disposed close to the second base film. Both the second top and the second bottom are elliptical in shape. The first support column and the second support column corresponding to the first support column are arranged intersectingly.

4. The directional sound-emitting component according to claim 3, characterized in that, The major axis of the first bottom portion has a length of 25 μm to 35 μm, and the minor axis of the first bottom portion has a length of 15 μm to 25 μm. The major axis of the first top portion has a length of 20 μm to 25 μm, and the minor axis of the first top portion has a length of 10 μm to 15 μm. And / or, the major axis of the second bottom is 20μm~30μm, the minor axis of the second bottom is 10μm~20μm, the major axis of the second top is 15μm~25μm, and the minor axis of the second top is 10μm~15μm.

5. The directional sound-emitting component according to claim 2, characterized in that, The first support column has a first top and a first bottom, with the first bottom positioned close to the first base film. Both the first top and the first bottom are circular. The second support column has a second top and a second bottom, the second bottom being disposed close to the second base film, and both the second top and the second bottom are circular. The orthographic projection of the first top onto the first base film overlaps the orthographic projection of the second top onto the first base film.

6. The directional sound-emitting component according to claim 5, characterized in that, The diameter of the first bottom is 20μm~35μm, and the diameter of the first top is 15μm~20μm. And / or, the diameter of the second bottom is 20μm~30μm, and the diameter of the second top is 10μm~15μm.

7. The directional sound-emitting component according to any one of claims 1 to 6, characterized in that, Further includes: A first electrode layer is disposed on one side surface of the first base film; A first conductive layer is disposed in the edge region of the surface of the first electrode layer away from the first base film; A second electrode layer is disposed on the surface of the second base film close to the first base film, and a plurality of second support pillars are disposed on the surface of the second electrode layer away from the second base film; A second conductive layer is disposed in the edge region of the surface of the second electrode layer away from the second base film; A first insulating layer covers the surface of the second conductive layer away from the second base film.

8. The directional sound-emitting component according to claim 7, characterized in that, The first support post is disposed on the surface of the first base film away from the first electrode layer; Alternatively, the directional sound-emitting component may further include a second insulating layer that covers the surface of the first conductive layer away from the first base film and a portion of the surface of the first electrode layer, with a plurality of the first support pillars disposed on the surface of the second insulating layer away from the first base film.

9. The directional sound-emitting component according to claim 8, characterized in that, At least one of the following conditions must be met: The first electrode layer and the second electrode layer each independently include at least one of an indium tin oxide film layer and a silver film layer; The sheet resistance of the first electrode layer and the sheet resistance of the second electrode layer are each independently less than or equal to 20Ω; The materials forming the first conductive layer and the materials forming the second conductive layer each independently include at least one of copper, silver, gold, and titanium; The diagonal resistance of the first conductive layer and the diagonal resistance of the second conductive layer are each independently less than or equal to 3Ω; The width of the first conductive layer and the width of the second conductive layer are each independently less than or equal to 1.5 mm; The thickness of the first conductive layer and the thickness of the second conductive layer are each 1 μm to 10 μm independently; The material forming the second insulating layer includes at least one of silicon nitride, silicon oxide, and silicon oxynitride; The second insulating layer includes an inorganic insulator layer and an organic insulator layer. The organic insulator layer is disposed on the surface of the inorganic insulator layer away from the first electrode layer. The material forming the inorganic insulator layer includes at least one of silicon nitride, silicon oxide, and silicon oxynitride. The thickness of the inorganic insulator layer is 100 nm to 600 nm, and the thickness of the organic insulator layer is 3 μm to 10 μm. The breakdown voltage of the second insulating layer is greater than or equal to 400V.

10. A method for manufacturing a directional sound-emitting component according to any one of claims 1 to 9, characterized in that, include: Multiple spaced first support columns are formed on one side of the first base film; Multiple spaced second support columns are formed on one side of the second base film; The first base film and the second base film are arranged opposite to each other. The first support column is arranged between the first base film and the second base film, and the second support column is arranged between the second base film and the first support column. The first support column and the second support column correspond one-to-one. The orthographic projection of each first support column on the first base film and the orthographic projection of the second support column corresponding to the first support column on the first base film overlap.

11. The method according to claim 10, characterized in that, The steps of forming the first support pillars with multiple intervals include: slit coating, exposure, and development; The step of forming a plurality of spaced second support columns includes: slit coating, exposure, and development.

12. The method according to claim 10 or 11, characterized in that, The method of fabricating the directional sound-emitting component before forming the first support column further includes: A first electrode layer is formed on one side surface of the first base film; A first conductive layer is formed in the edge region of the surface of the first electrode layer away from the first base film; The method of fabricating the directional sound-emitting component before forming the second support column further includes: A second electrode layer is formed on one side surface of the second base film; A second conductive layer is formed in the edge region of the surface of the second electrode layer away from the second base film; A first insulating layer is formed on the side of the second conductive layer away from the second base film; After the first insulating layer is formed, a plurality of second support pillars are formed on the surface of the second electrode layer away from the second base film.

13. The method according to claim 12, characterized in that, After the first conductive layer is formed, a plurality of spaced first support pillars are formed on the surface of the first base film away from the first electrode layer. Alternatively, the method of manufacturing the directional sound-emitting component may further include: forming a second insulating layer on the side of the first conductive layer away from the first base film, such that the second insulating layer covers the surface of the first conductive layer away from the first base film and a portion of the surface of the first electrode layer away from the first base film. After the second insulating layer is formed, a plurality of first support pillars are formed on the surface of the second insulating layer away from the first base film.

14. The method according to claim 13, characterized in that, At least one of the following conditions must be met: The first electrode layer is formed by sputtering, with a sputtering temperature of less than or equal to 120°C; The second electrode layer is formed by sputtering at a temperature of 120°C or less. The first conductive layer is formed by sputtering at a temperature of 120°C or less. The second conductive layer is formed by sputtering at a temperature of 120°C or less. The second insulating layer includes an inorganic insulator layer and an organic insulator layer. The organic insulator layer is disposed on the surface of the inorganic insulator layer away from the first electrode layer. The inorganic insulator layer is formed by sputtering at a temperature of less than or equal to 120°C. The organic insulator layer is formed by slot coating.

15. A display device, characterized in that, include: Display panel; and The directional sound-emitting component according to any one of claims 1 to 9.

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