Display device and preparation method thereof

Abstract

The invention discloses a display device and a preparation method thereof. The display device comprises a display panel and a directional sound production assembly arranged on the light emitting side of the display panel. The directional sound production assembly comprises a first base film, a second base film, a plurality of first supporting columns and a plurality of second supporting columns, wherein the first base film and the second base film are oppositely arranged. One of the first supporting column and the second supporting column is arranged on one side, facing the second base film, of the first base film; the other one of the first supporting columns and the second supporting columns is arranged on the side, facing the first base film, of the second base film, and the multiple second supporting columns correspond to at least part of the first supporting columns in a one-to-one mode; the second supporting columns and the first supporting columns corresponding to the second supporting columns are oppositely arranged in the first direction, and air gaps are formed between the second supporting columns and the first supporting columns corresponding to the second supporting columns.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a display device and a method for manufacturing the same. Background Art

[0002] With the development of display technologies and the continuous improvement of people's living standards along with the development of society, display technologies have gradually entered thousands of households. Consumer electronic products such as mobile phones, tablets, laptop computers, and e-readers have also penetrated more deeply into people's work, study, and life. In public places, the problems of information leakage and interference trouble us all the time. To solve this problem, the directional sound emission technology has emerged, which solves the problem of sound anti-interference. However, the current directional sound emission components still need to be improved. Summary of the Invention

[0003] The present invention is made based on the inventor's discovery and recognition of the following facts and problems:

[0004] The structure of the sound emission component of the directional sound emission screen in the prior art is as Figure 1 shown, including a base film, a diaphragm, and support columns arranged on one side of the base film. By setting the support columns, the height of the cavity and the sound emission uniformity are improved.

[0005] However, the inventor found that the support columns in the prior art are extremely likely to fall off or move obliquely during use, resulting in local sound leakage, local sound loss, or sound distortion of the directional sound emission device.

[0006] To solve at least one of the above problems, a first aspect of the present invention provides a display device.

[0007] The display device includes a display panel and a directional sound emission component arranged on the light-emitting side of the display panel. The directional sound emission component includes

[0008] oppositely arranged first base film and second base film, and a plurality of first support columns and second support columns;

[0009] One of the first support columns and the second support columns is arranged on the side of the first base film facing the second base film;

[0010] The other of the first support columns and the second support columns is arranged on the side of the second base film facing the first base film, wherein

[0011] the plurality of second support columns correspond to at least some of the first support columns one by one;

[0012] The second support column and the corresponding first support column are oppositely arranged in the first direction, and an air gap is formed between the second support column and the corresponding first support column.

[0013] In some alternative embodiments, the orthographic projection of the second support post on the second base film covers the orthographic projection of its corresponding first support post on the second base film.

[0014] In some alternative embodiments, the height of the first support post is less than or equal to the height of its corresponding second support post;

[0015] The gap between the first support post and its corresponding second support post in the first direction is greater than zero and less than or equal to one half of the height of the first support post, where the first direction is the direction from the first base film towards the second base film.

[0016] In some alternative embodiments, the orthographic projection of the second support post on the second base film surrounds the orthographic projection of its corresponding first support post on the second base film.

[0017] In some alternative embodiments, the second support post includes at least two second auxiliary support posts that are discontinuously arranged.

[0018] In some alternative embodiments, the second support post is a closed annular component.

[0019] In some alternative embodiments, the orthographic projection of the first support post on the vertical plane of the second base film and the orthographic projection of the second support post on the vertical plane of the second base film at least partially overlap.

[0020] In some alternative embodiments, the distance between the center line of the first support post and the center line of its corresponding second support post is greater than or equal to one quarter of the bottom diameter of the first support post and less than or equal to the bottom diameter of the first support post.

[0021] In some alternative embodiments, the first support post and the second support post are made of an elastic organic material.

[0022] In some alternative embodiments, the distance between adjacent first support posts is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0023] In some alternative embodiments, the display device further includes

[0024] a first electrode layer, which is disposed on the side of the first base film away from the second base film;

[0025] a first conductive layer, which is disposed in the edge region of the surface of the first electrode layer away from the first base film;

[0026] a second electrode layer, which is disposed on the side of the second base film close to the first base film;

[0027] A second conductive layer, which is disposed in an edge region of a surface of the second electrode layer close to the first base film.

[0028] A second aspect of the present invention provides a method for manufacturing a display device, including forming a plurality of spaced-apart first support pillars on one of the first base film and the second base film;

[0029] forming a plurality of spaced-apart second support pillars on the other of the first base film and the second base film, where the second support pillars correspond to at least some of the first support pillars one by one;

[0030] Disposing the first base film and the second base film opposite to each other such that the plurality of first support pillars and second support pillars are disposed between the first base film and the second base film, and there is a gap between the second support pillar and the corresponding first support pillar.

[0031] In some optional embodiments, the method further includes:

[0032] forming a first electrode layer on one side surface of the first base film;

[0033] forming a first conductive layer in an edge region of a surface of the first electrode layer away from the first base film;

[0034] forming a second electrode layer on one side surface of the second base film;

[0035] forming a second conductive layer in an edge region of a surface of the second electrode layer away from the second base film.

[0036] In some optional embodiments, the step of forming the plurality of spaced-apart first support pillars includes: slot coating, exposure, and development;

[0037] The step of forming the plurality of spaced-apart second support pillars includes: slot coating, exposure, and development.

[0038] The beneficial effects of the present invention are as follows:

[0039] In view of the existing problems at present, the present invention formulates a display device and a manufacturing method thereof. In the present invention, the first support pillars and the second support pillars are disposed opposite to each other in the cavity of the sound generating component of the display device, improving the stability of the support pillars. When the base film vibrates, the tops or sides of the first support pillars and the second support pillars can come into contact, and the oblique forces received by the support pillars during the vibration process are offset, further improving the stability of the first support pillars and the second support pillars, thereby avoiding local sound loss and sound leakage caused by the falling off or displacement of the support pillars of the directional sound generating component, and enhancing the service life of the product. Description of the Drawings

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0041] Figure 1 A cross-sectional view of a directional sound-emitting component of the prior art is shown.

[0042] Figure 2 A cross-sectional view of another directional sound-emitting component of the prior art is shown.

[0043] Figure 3 An electron micrograph of a detached support post is shown.

[0044] Figure 4 A cross-sectional view of a display device provided by an embodiment of the present application is shown.

[0045] Figure 5 For the display device according to the present application Figure 4 A schematic top view is shown.

[0046] Figure 6 A cross-sectional view of another display device provided by an embodiment of the present application is shown.

[0047] Figure 7 A cross-sectional view of yet another display device provided by an embodiment of the present application is shown.

[0048] Figure 8 Shown is the present application Figure 7 An enlarged schematic view of structure 50 is shown.

[0049] Figure 9 For the display device according to the present application Figure 7 A schematic top view is shown.

[0050] Figure 10 A cross-sectional view of a display device proposed by another embodiment of the present application is shown.

[0051] Figure 11 Shown is the present application Figure 10 An enlarged schematic view of structure 50 is shown.

[0052] Figure 12 Shown is the present application Figure 10 A schematic top view of the display device is shown.

[0053] Figure 13 Shown is the present application Figure 10 Another schematic top view of the display device is shown.

[0054] Figure 14 A schematic top view of a display device proposed in an embodiment of the present application is shown.

[0055] Figure 15 A cross-sectional view of another display device proposed in another embodiment of the present application is shown.

[0056] Figure 16 A schematic top view of a display device proposed in another embodiment of the present application is shown.

[0057] Figure 17 Shown in the present application Figure 15 A schematic top view of a display device shown is shown.

[0058] Figure 18 A cross-sectional view of yet another display device proposed in another embodiment of the present application is shown. Detailed implementation manners

[0059] To more clearly illustrate the present invention, the present invention will be further described below in conjunction with preferred embodiments and the accompanying drawings. Similar components in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

[0060] It should be noted that the "on...", "formed on...", and "disposed on..." described herein can mean that one layer is directly formed or disposed on another layer, or can also mean that one layer is indirectly formed or disposed on another layer, that is, there are other layers between the two layers.

[0061] The structure of the sound generating component of the directional sound screen in the prior art is as Figure 1 shown, including a base film 105, a diaphragm 101, and support columns 103 disposed on one side of the diaphragm 101. By providing the support columns 103, the height of the cavity and the sound emission uniformity are improved.

[0062] However, the inventor found that the support columns in the prior art are extremely likely to fall off or move obliquely during use, resulting in local sound leakage, local sound loss, or sound distortion of the directional sound device. The electron microscope image of the fallen support column is as Figure 3 shown. When the support column falls off, a large number of fragments will be generated, and it will also cause secondary damage to the cavity structure of the sound generating component, aggravating the sound leakage and sound loss phenomena.

[0063] An embodiment of the present invention provides a display device. The display device can be any product or component with display and camera functions, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc. Other essential components of the display device are understood by those of ordinary skill in the art and will not be elaborated herein, nor should they be considered as a limitation to this application.

[0064] According to an embodiment of the present invention, referring to Figure 4 、 Figure 6 、 Figure 7 、 Figure 10 、 Figure 15 and Figure 18 , the display device includes a display panel 300 and a directional sound generating component disposed on the light-emitting side of the display panel 300. The directional sound generating component may include a first base film 205 and a second base film 201 disposed opposite to each other, and a plurality of first support columns 202 and second support columns 203;

[0065] One of the first support columns 202 and the second support columns 203 is disposed on the side of the first base film 205 facing the second base film 201;

[0066] The other of the first support columns 202 and the second support columns 203 is disposed on the side of the second base film 201 facing the first base film 205, wherein,

[0067] The plurality of second support columns 203 correspond to at least some of the first support columns 202 one by one;

[0068] The second support column 203 and the corresponding first support column 202 are disposed opposite to each other in the first direction, and an air gap is formed between the second support column 203 and the corresponding first support column 202.

[0069] Thus, by disposing the second support column on the opposite side of at least some of the first support columns, the height of the first support column is reduced, and the stability of the first support column is improved. During the vibration sound generation process, the first base film or the second base film vibrates, and the first support column moves in the first direction. Since the first support column has a certain height, it is affected by an oblique force and moves obliquely. Due to the presence of the second support column, when the base film vibrates, the tops or sides of the first support column and the second support column can come into contact, and the oblique force received by the support column during the vibration process is offset, improving the stability of the first support column and the second support column, thereby avoiding local sound loss and sound leakage caused by the detachment or displacement of the support column of the directional sound generating component, and improving the service life of the product.

[0070] By Figure 2It can be known that the existing directional sound-emitting component is provided with a first electrode layer 104 and an insulating layer (not shown in the figure) covering the first electrode layer 104 on one side of the base film 105, and a plurality of spaced supports 103 are provided on the surface of the insulating layer away from the base film 105; a second electrode layer 102 is provided on the side of the diaphragm 101 close to the base film 105; a sealing glue 106 is provided between the sides of the base film 105 and the diaphragm 101 to form a cavity, and the sealing glue bonds and encapsulates the side structures of the base film 105 and the diaphragm 101, so that the base film 105 and the diaphragm 101 are arranged relative to each other; by applying voltage to the first electrode layer 104 and the second electrode layer 102, an electric field is generated between the first electrode layer 104 and the second electrode layer 102, and the diaphragm 101 vibrates under the action of Coulomb force, thereby generating ultrasonic waves with super strong directivity, thereby realizing directional sound emission.

[0071] Since the isolation column is made of flexible resin material and is arranged between the diaphragm and the base film, it is very easy to cause oblique displacement or even fall off during ultrasonic oscillation, resulting in local sound leakage or loss of sound, changing the cavity structure to make the directional sound effect worse, and aggravating the sound leakage or loss of sound.

[0072] In one possible implementation, reference Figure 4 , the directional sound-emitting component comprises a first base membrane and a second base membrane which are arranged opposite to each other;

[0073] The second supporting column is arranged on the side of the first base film facing the second base film;

[0074] The first supporting column is arranged on a side of the second base film facing the first base film;

[0075] The first supporting column and the second supporting column are arranged opposite to each other in a first direction, and the first direction is a direction perpendicular to the first base film.

[0076] In one possible implementation, reference Figure 6 , the directional sound emitting component comprises a first base membrane 205 and a second base membrane 201 which are arranged opposite to each other;

[0077] The first support column 202 is disposed on the side of the first base film 205 facing the second base film 201;

[0078] The second supporting column 203 is disposed on a side of the second base film 201 facing the first base film 205;

[0079] The first support column 202 and the second support column 203 are disposed opposite to each other in a first direction, ie, a direction perpendicular to the first base film 205 .

[0080] Optionally, the material of the first base film includes at least one of CPI, PET, PMMA, TAC, and COP; the material of the second base film includes at least one of CPI, PET, POL, PMMA, TAC, and COP.

[0081] In a possible implementation, referring to Figure 5 and Figure 6 , Figure 5 is a perspective view of the first support post 202 and the second support post 203 in a direction perpendicular to the first substrate. The first support post 202 is a frustum of a cone, and the second support post 203 is a truncated cone. The first support post 202 has a first top 2022 and a first bottom 2021. The first bottom 2021 of the first support post 202 is disposed close to the first base film 205. Both the first top 2022 and the first bottom 2021 are circular or elliptical; the second support post 203 has a second top 2032 and a second bottom 2031. The second bottom 2031 of the second support post 203 is disposed close to the second base film 201. The second top 2032 is rectangular, and the second bottom 2031 is rectangular.

[0082] Optionally, the structures of the respective first support posts 202 are the same, and the structures of the respective second support posts 203 are the same, being a cylinder, a frustum of a cone, a prism, or a frustum of a pyramid; the area of the second top 2032 of the second support post 203 is greater than or equal to the area of the first top 2022 of the first support post 202, and the area of the second bottom 2031 of the second support post 203 is greater than or equal to the area of the first bottom 2021 of the first support post 202. Thus, the second support post 203 has better support performance and a stronger stabilizing effect on the first support post 202.

[0083] Further optionally, the interval d1 between two adjacent first support posts 202 may be 0.5 mm to 2 mm, for example, it may be 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.7 mm, 2 mm, etc. Thus, there is an appropriate interval between the first support posts 202, which is beneficial to improving the overall performance of the directional sound generating assembly. It should be noted that when the cross-section of the first support post 202 in the height direction is trapezoidal, the interval between two adjacent first support posts 202 refers to the interval between the first bottoms 2021 of two adjacent first support posts 202.

[0084] Further optionally, as Figure 8 shown, is an enlarged view of the support post group 50. The diameter L5 of the top surface of the second support post is greater than or equal to twice the diameter L3 of the top surface of the first support post; the diameter L4 of the bottom surface of the second support post is greater than or equal to the diameter L2 of the bottom surface of the first support post.

[0085] Optionally, the orthographic projection of the second support column 203 on the second base film 201 covers the orthographic projection of its corresponding first support column 202 on the second base film 201.

[0086] In this embodiment, by setting the orthographic projection of the second support column on the second base film 201 to cover the orthographic projection of its corresponding first support column on the second base film 201, the bottom area of the second support column is increased, so that the second support column has good stability during the vibration of the second base film 201 and is not easily detached. Moreover, it is defined that the radius of the second top is greater than or equal to the diameter of the first top, so that during the vibration of the directional sound generating assembly, even if displacement occurs, the top of the first support column contacts the top of the second support column.

[0087] When the support columns are only arranged on one side, in order to ensure the cavity height, supports with relatively high height will be formed as much as possible during manufacturing, and it is easy to have a problem of poor height uniformity of the supports. That is to say, there will be a situation where the height of some local supports is relatively low. Under a constant bias voltage, the electrostatic force received by the diaphragm is the same. When the height of some local supports is relatively low, the supporting ability of the supports is insufficient, resulting in the distance between the diaphragm and the first base film 205 in this area becoming closer, and the cavity height between the diaphragm and the first base film 205 being relatively low, presenting a strip-shaped collapse phenomenon under reflected light and resulting in strip-shaped abnormal problems.

[0088] Compared with the technical solution of only arranging supports on one side, in this embodiment, by arranging the second support column 203 on the opposite side of the first support column 202, the height of the support column is reduced and the cavity height is ensured, which is beneficial to improving the uniformity of the support column, thereby effectively improving the strip-shaped abnormal problems.

[0089] Optionally, the height of the gap H is 9 microns, the height H1 of the first support column 202 is 3.5 - 4.5 microns, the height H2 of the second support column 203 is 3.5 - 4.5 microns, and the gap H3 between the top surfaces of the first support column 202 and the second support column 203 is 0 - 2 microns.

[0090] In a possible implementation manner, as Figure 7 、 Figure 9 shown, the directional sound generating assembly includes a plurality of support column groups 50 and a third support column 206 arranged only on one side. The support column group 50 includes a first support column 202 and a second support column 203 arranged oppositely, and the support column groups 50 and the third support column 206 are arranged at intervals.

[0091] In a possible implementation, the height H1 of the first support column 202 is less than or equal to the height H2 of its corresponding second support column 203; the gap H3 between the first support column 202 and its corresponding second support column 203 in the first direction X is greater than zero and less than or equal to one half of the height H1 of the first support column 202, where the first direction X is the direction from the first base film 205 to the second base film 201.

[0092] In a possible implementation, the height H2 of the second support column 203 is less than or equal to the height H1 of its corresponding first support column 202; the gap H3 between the first support column 202 and its corresponding second support column 203 in the first direction X is greater than zero and less than or equal to one half of the height of the second support column 203, where the first direction X is the direction from the first base film 205 to the second base film 201.

[0093] In this embodiment, by limiting the gap between the first support column and its corresponding second support column to be less than one half of the height of the support column with a smaller height, there is a certain interval between the two when the directional sound generating component is not powered on. When the second base film vibrates violently, the second top of the second support column can contact the first top of the first support column, so as to prevent the first support column and the second support column from being affected by oblique forces during vibration and having large displacements or even falling off, resulting in regional sound loss of the directional sound generating component.

[0094] In a possible implementation, referring to Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14 、 Figure 16 and Figure 17 , the orthographic projection of the second support column 203 on the second base film 201 surrounds the orthographic projection of its corresponding first support column 202 on the second base film 201.

[0095] In this embodiment, a second support column 203 is arranged on the opposite side of the first support column 202, where the second support column 203 is used for limiting. The orthographic projection of the second support column 203 on the second base film 201 surrounds the orthographic projection of its corresponding first support column 202 on the second base film 201, so that when the directional sound generating component is powered on, the first support column 202 that undergoes an oblique displacement under the action of an oblique force contacts the inner side surface of the second support column 203, thereby offsetting the oblique force received by the first support column 202 and making the first support column 202 not easily undergo oblique displacement or even fall off during vibration.

[0096] It should be noted that due to the relative sliding between the first substrate 205 and the second substrate 201, even if the first support column 202 and the second support column 203 do not contact each other, the oblique force on the first support column 202 during vibration can be reduced.

[0097] In an alternative embodiment, as Figure 10 and Figure 11 shown, the distance L1 between the first support column 202 and its corresponding second support column 203 is greater than or equal to one-fourth of the bottom diameter L2 of the first support column 202 and less than or equal to the bottom diameter L2 of the first support column 202.

[0098] Optionally, as Figure 12 shown, the first support column 202 is a frustum of a cone, and the second support column 203 is a closed annular component. It can be understood that the closed annular component can be formed by a plurality of continuously arranged second auxiliary support columns. The second auxiliary support column is, for example, a frustum of a pyramid or a frustum of a cone. The cross-section of the second auxiliary support column is an isosceles trapezoid. The distance between the first support column 202 and its corresponding second support column 203 is the distance between the center line of the first support column 202 and the axis of symmetry of the isosceles trapezoid in the horizontal direction, that is, the distance between the first support column 202 and its corresponding second support column 203 refers to the distance between the center of the bottom surface of the first support column 202 and the center of the bottom surface of the second auxiliary support column in the horizontal direction. Among them, Figure 13 the cross-sectional view obtained along the section line C-C' in Figure 11 is shown as

[0099] Optionally, as Figure 13 and Figure 14 shown, the first support column 202 is a frustum of a cone, and the second support column 203 includes a plurality of second auxiliary support columns 2033 that are discontinuously arranged around the first support column 202, for example, including four second auxiliary support columns 2033. Among them, Figure 13 the cross-sectional view obtained along the section line A-A' in Figure 11 is shown as

[0100] It can be understood that the distance between the first support column 202 and its corresponding second support column 203, that is, L1, is the distance between the center line of the first support column 202 and the center line of any second auxiliary support column 2033 in the horizontal direction. That is, the distance between the first support column 202 and its corresponding second support column 203 refers to the distance between the center of the bottom surface of the first support column 202 and the center of the bottom surface of any second auxiliary support column 2033 in the horizontal direction.

[0101] It is understandable that the present application does not limit the specific number of the second auxiliary support columns 2033 , and the number of the second auxiliary support columns 2033 can be greater than zero, for example, including 1, 2 or 3.

[0102] In a specific example, the top surface diameter L5 of the second auxiliary support column 2033 is 8 microns, the bottom surface diameter L4 of the second auxiliary support column 2033 is 12 microns, the top surface diameter L3 of the first support column 202 is 17 microns, and the bottom surface diameter L2 of the first support column 202 is 24 microns.

[0103] In a specific example, the orthographic projection of the second support column 203 on the second base film 201 surrounds the orthographic projection of its corresponding first support column 202 on the second base film 201. The orthographic projection of the first support column 202 on the vertical plane of the second base film 201 and the orthographic projection of the second support column 203 on the vertical plane of the second base film 201 at least partially overlap.

[0104] Optionally, a length of an overlapping portion of the first support column 202 and the second support column 203 in the first direction X is greater than half of a height H2 of the second support column 203 .

[0105] In a specific example, the height H1 of the first support pillar 202 in the first direction is 4 micrometers, the height H2 of the second support pillar 203 in the first direction is 8 micrometers, and the height of the cavity is 9 micrometers.

[0106] This embodiment limits the positional relationship between the first support column 202 and the second support column 203, and further limits the height and spacing range of the first support column 202 and the second support column 203, so that when the directional sound-emitting component is powered on, the first support column 202 that is obliquely displaced by the oblique force can contact the inner side of the second support column 203, thereby offsetting the oblique force on the first support column 202, making it difficult for the first support column 202 to be obliquely displaced or even fall off during vibration, thereby avoiding local sound leakage and sound loss, increasing the service life of the display device, and enhancing the overall stability of the display device.

[0107] In one possible implementation, Figure 17 , Figure 18As shown, the directional sound - emitting component includes a plurality of support post groups 50 and a third support post 206 disposed only on one side. The support post group 50 includes a first support post 202 and a second support post 203 that are oppositely disposed. The support post groups 50 and the third support post 206 are arranged at intervals. Among them, the second support post 203 disposed on the side of the first base film 205 close to the second base film 201 surrounds the first support post 202 disposed on the side of the second base film 201 close to the first base film 202. Among them, along Figure 17 The cross - sectional view obtained along the section line B - B’ in Figure 18 is as shown in

[0108] In this embodiment, the distribution density of the second support posts is reduced. By disposing the second support posts on the opposite side of the first support posts, while ensuring the prevention of the first support posts from falling off and lateral displacement, the preparation materials and preparation processes are saved.

[0109] In a possible implementation manner, the material of the second base film 201 may include at least one of CPI, PET, POL (polarizer, with a PVA film layer sandwiched between two TAC film layers, and PVA is polyvinyl alcohol), PMMA, TAC, and COP, etc. That is to say, the second base film 201 can be prepared from one of the above - mentioned materials, or can be prepared from two or more of the above - mentioned materials. The above - mentioned materials all have good acid - alkali resistance and temperature resistance. The second base film 201 formed from the above - mentioned materials has good light - transmission performance, which is beneficial to further improving the overall performance of the directional sound - emitting component.

[0110] In a possible implementation manner, the directional sound - emitting component further includes

[0111] a first electrode layer 20B, and the first electrode layer 20B is disposed on the side of the first base film 205 away from the second base film;

[0112] a first conductive layer 20A, and the first conductive layer 20A is disposed in the edge area of the surface of the first electrode layer 20B away from the first base film 205;

[0113] a second electrode layer 20B, and the second electrode layer 20B is disposed on the side of the second base film 201 close to the first base film 205;

[0114] a second conductive layer 208, and the second conductive layer 208 is disposed in the edge area of the surface of the second electrode layer 20B close to the first base film 205.

[0115] In a possible implementation, each of the first electrode layer 20B and the second electrode layer 20B independently includes at least one of an indium tin oxide (ITO) film layer and a silver film layer. Thus, both the first electrode layer 20B and the second electrode layer 20B have good electrical conductivity, which is beneficial to improving the performance of the directional sound generating component. According to some embodiments of the present invention, the first electrode layer 20B and the second electrode layer 20B can each independently be a silver film layer (with a thickness of 1 nm to 5 nm) or an ITO film layer (with a thickness of about 100 nm).

[0116] In a possible implementation, the first electrode layer 20B and the second electrode layer 20B can each independently be composed of an ITO film layer (with a thickness of about 25 nm), a silver film layer (with a thickness of about 10 nm), and an ITO film layer (with a thickness of about 25 nm) that are sequentially stacked. In a possible implementation, the thickness of the first electrode layer 20B and the thickness of the second electrode layer 20B can each independently be 1 nm to 100 nm. For example, the thickness of the first electrode layer 20B can be 1 nm, 3 nm, 5 nm, 10 nm, 30 nm, 50 nm, 70 nm, 100 nm, etc., and the thickness of the second electrode layer 20B can be 1 nm, 3 nm, 5 nm, 10 nm, 30 nm, 50 nm, 70 nm, 100 nm, etc. The above electrode layers have a small sheet resistance, better electrical conductivity, good voltage consistency between the distal and proximal ends of the electrode layer, which is beneficial to further improving the performance of the directional sound generating component.

[0117] In a possible implementation, the sheet resistance of the first electrode layer 20B and the sheet resistance of the second electrode layer 20B can each independently be less than or equal to 20 ohms. The smaller the sheet resistance of the electrode layer, the better the electrical conductivity of the electrode layer, the better the voltage uniformity between the distal and proximal ends of the electrode layer, the more consistent the vibration amplitude in different regions, and the higher the audible sound pressure level.

[0118] In a possible implementation, as Figure 10 and Figure 15 shown, the directional sound generating device further includes a first conductive layer 20A and a second conductive layer 208. Both the first conductive layer 20A and the second conductive layer 208 have good electrical conductivity. The first conductive layer 20A and the second conductive layer 208 are respectively disposed in the edge regions of the first electrode layer 20B and the second electrode layer 20B, which can improve the power supply uniformity of the first electrode layer 20B and the second electrode layer 20B, making the voltage uniformity between the distal and proximal ends of the first electrode layer 20B and the second electrode layer 20B better, thereby being beneficial to further improving the overall performance of the directional sound generating component.

[0119] Optionally, the material of the first conductive layer 20A and the material of the second conductive layer 208 can each independently include at least one of copper, silver, gold, titanium, etc.

[0120] In a possible implementation, the material for forming the first conductive layer 20A can be silver, copper, silver paste, etc., and the material for forming the second conductive layer 208 can be silver, copper, silver paste, etc. Thus, it is beneficial to reduce the manufacturing cost, and the conductive layer formed of the above materials has good electrical conductivity. According to other embodiments of the present invention, the material for forming the first conductive layer 20A can be a copper-silver alloy, and the material for forming the second conductive layer 208 can be a copper-silver alloy.

[0121] In a possible implementation, the thickness of the first conductive layer 20A and the thickness of the second conductive layer 208 can each independently be 1 μm to 10 μm. For example, the thickness of the first conductive layer 20A can be 1 μm, 2 μm, 5 μm, 7 μm, 10 μm, etc., and the thickness of the second conductive layer 208 can be 1 μm, 3 μm, 5 μm, 8 μm, 10 μm, etc. On the basis of meeting the diagonal line resistance, the thickness of the first conductive layer 20A and the second conductive layer 208 can be minimized as much as possible, which is beneficial to reducing the step difference between the display area and the surrounding area of the display device.

[0122] Those skilled in the art should understand that the above conductive layer and electrode layer can both be formed by chemical vapor deposition using a conventional mask, which will not be elaborated here.

[0123] On the other hand of the present invention, the present invention proposes a method for manufacturing the aforementioned display device.

[0124] In a possible implementation, the manufacturing method of the aforementioned display device includes the following steps:

[0125] S201: Provide a first base film 205 and a second base film 201; form a plurality of first support columns 202 arranged at intervals on one of the first base film 205 and the second base film 201;

[0126] Specifically, the step of forming a plurality of first support columns 202 arranged at intervals can include: slit coating, exposure, and development. Thus, the support columns can be manufactured using a mature process, which is beneficial to improving the process yield.

[0127] The specific position of the first support columns 202 can be set according to the actual situation.

[0128] S202: Form a plurality of second support columns 203 arranged at intervals on the other of the first base film 205 and the second base film 201, and the second support columns 203 correspond to at least some of the first support columns 202 one by one;

[0129] S203: Oppositely arrange the first base film 205 and the second base film 201 such that the multiple first support columns 202 and the second support columns 203 are disposed between the first base film 205 and the second base film 201, and there is a gap between the second support column 203 and the corresponding first support column 202.

[0130] In a possible implementation manner, before step S201, it further includes:

[0131] S101: Form a first electrode layer 20B on one side surface of the first base film 205;

[0132] Specifically, the first electrode layer 20B can be formed by a sputtering process, and the sputtering temperature can be less than or equal to 120°C. Thus, by using a low-temperature sputtering process to form the first electrode layer 20B, a first electrode layer 20B with uniform composition and thickness can be formed, enabling the first electrode layer 20B to have good voltage consistency, which is beneficial to improving the overall performance of the directional sound generation component. In some possible implementation manners, an ITO film layer or a silver film layer can be formed on one side surface of the first base film 205 by a low-temperature sputtering process as the first electrode layer 20B. Alternatively, an ITO film layer, a silver film layer, and an ITO film layer can be sequentially formed on one side surface of the first base film 205 by a low-temperature sputtering process as the first electrode layer 20B.

[0133] S102: Form a first conductive layer 20A in the edge region of the surface of the first electrode layer 20B away from the first base film 205;

[0134] Specifically, after forming the first electrode layer 20B, a first conductive layer 20A can be formed in the edge region of the surface of the first electrode layer 20B away from the first base film 205. The first conductive layer 20A can be formed by a sputtering process, and the sputtering temperature can be less than or equal to 120°C. Thus, the first conductive layer 20A can be formed in the edge region of the first electrode layer 20B by a low-temperature sputtering process. This process is mature, which is beneficial to improving the product yield. Moreover, by using this process to form the first conductive layer 20A, it is more conducive to controlling the width and thickness of the first conductive layer 20A, thereby being beneficial to further improving the overall performance of the directional sound generation component. Optionally, 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 20B by a low-temperature sputtering process as the first conductive layer 20A.

[0135] S103: Form a first insulating layer on the side of the first conductive layer 20A away from the first electrode layer 20B. The first insulating layer can cover the surface of the first conductive layer 20A away from the first electrode layer 20B. Thus, the first insulating layer can play a role in protecting the first conductive layer 20A.

[0136] S104: Form a second electrode layer 20B on one side surface of the second base film 201;

[0137] For the specific steps of forming the second electrode layer 20B, refer to the preparation of the aforementioned first electrode layer 20B.

[0138] S105: Form a second conductive layer 208 in the edge region of the surface of the second electrode layer 20B away from the second base film 201.

[0139] For the specific steps of forming the second conductive layer 208, refer to the preparation of the aforementioned first conductive layer 20A.

[0140] Before manufacturing the directional sound emitting component, software simulation can be performed first to determine a better technical solution, determine the range of parameters of each layer in the design scheme of the directional sound emitting component, and output the overall technical solution and expected effects; determine the interval range, top size, bottom size, and height of the support pillars; determine the height of the cavity. Considering the performance and reliability of the film material comprehensively, avoid problems such as the film material losing its plastic deformation and the device function failing due to excessive amplitude and sound pressure level. The present invention aims at the existing problems currently, and formulates a display panel, a display device, and a manufacturing method of the display panel. By adopting a low pixel density in the second display area corresponding to the under-screen camera area, a light-transmitting portion is formed between two adjacent pixels, and then through a lens unit corresponding to the light-transmitting portion of the second display area arranged in the encapsulation layer, external light is converged to the light-transmitting portion and transmitted to the under-screen camera area through the light-transmitting portion, increasing the transmittance of the external incident light of the display panel, and further increasing the light transmitted to the camera area through the light-transmitting portion, meeting the camera requirements of the full-screen, effectively improving the imaging effect, and having a wide application prospect.

[0141] The method further includes arranging the formed directional sound emitting component on the light-emitting side of the display panel.

[0142] Specifically, the display panel is, for example, an LCD display panel, and may also be other types of display panels such as an LED display panel, an OLED display panel, or a Micro LED display panel.

[0143] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is impossible to list all the implementation manners here. All obvious changes or variations derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A display device, characterized in that, Comprising a display panel and a directional sound - generating component disposed on the light - emitting side of the display panel, the directional sound - generating component includes a first base film and a second base film disposed opposite to each other, and a plurality of first support columns and second support columns; One of the first support columns and the second support columns is disposed on the side of the first base film facing the second base film; The other of the first support columns and the second support columns is disposed on the side of the second base film facing the first base film, wherein, The plurality of second support columns correspond to at least some of the first support columns one by one; The second support column and the corresponding first support column are disposed opposite to each other in the first direction, and an air gap is formed between the second support column and the corresponding first support column.

2. The display device according to claim 1, wherein The orthographic projection of the second support column on the second base film covers the orthographic projection of its corresponding first support column on the second base film.

3. The display device according to claim 2, wherein The height of the first support column is less than or equal to the height of its corresponding second support column; The gap between the first support column and its corresponding second support column in the first direction is greater than zero and less than or equal to one - half of the height of the first support column, wherein the first direction is the direction from the first base film to the second base film.

4. The display device according to claim 1, wherein The orthographic projection of the second support column on the second base film surrounds the orthographic projection of its corresponding first support column on the second base film.

5. The display device according to claim 4, wherein The second support column includes at least two second auxiliary support columns that are discontinuously arranged.

6. The display device according to claim 4, wherein The second support column is a closed annular component.

7. The display device according to claim 4, wherein The orthographic projection of the first support column on the vertical plane of the second base film and the orthographic projection of the second support column on the vertical plane of the second base film overlap at least partially.

8. The display device according to claim 4, wherein The distance between the first support column and its corresponding second support column is greater than or equal to one - fourth of the bottom diameter of the first support column and less than or equal to the bottom diameter of the first support column.

9. The display device according to claim 1, wherein The first support column and the second support column are made of an elastic organic material.

10. The display device according to claim 1, wherein The interval between two adjacent first support columns is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

11. The display device according to claim 1, wherein, The display device further includes a first electrode layer, which is disposed on the side of the first base film away from the second base film; a first conductive layer, which is disposed on the edge region of the surface of the first electrode layer away from the first base film; a second electrode layer, which is disposed on the side of the second base film close to the first base film; a second conductive layer, which is disposed on the edge region of the surface of the second electrode layer close to the first base film.

12. A method for manufacturing a display device, characterized in that, forming a plurality of first support pillars spaced apart on one of the first base film and the second base film; forming a plurality of second support pillars spaced apart on the other of the first base film and the second base film, the second support pillars corresponding to at least some of the first support pillars one by one; disposing the first base film and the second base film opposite to each other such that the plurality of first support pillars and second support pillars are disposed between the first base film and the second base film, and there is a gap between the second support pillar and the corresponding first support pillar.

13. The preparation method according to claim 12, characterized in that, The method 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; 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.

14. The manufacturing method according to claim 12, characterized in that, the step of forming the plurality of first support pillars spaced apart includes: slot coating, exposure and development; the step of forming the plurality of second support pillars spaced apart includes: slot coating, exposure and development.

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