阅读说明：本技术 发声显示屏及其制备方法和工作方法、显示装置 (Sound production display screen, manufacturing method and working method thereof, and display device ) 是由 刘高鹏 马中生 刘航 穆欣炬 唐鹏宇 陈祥麟 于 2021-07-30 设计创作，主要内容包括：本发明提供一种发声显示屏及其制备方法和工作方法、显示装置,发声显示屏包括：基板；与基板相对设置的发声膜层；位于发声膜层朝向所述基板一侧表面的压电膜层；发光结构,发光结构位于基板朝向压电膜层的一侧表面；压电隔离结构,所述压电隔离结构位于所述基板和所述压电膜层之间且位于至少部分所述发光结构的侧部,所述压电隔离结构包括压电隔离柱和与压电隔离柱连接的第二驱动电极；位于所述基板上的第二驱动模块,所述第二驱动模块包括：数据接收单元、数据处理单元和数据反馈单元。提高了发声显示屏的寿命。(The invention provides a sound display screen, a preparation method and a working method thereof, and a display device, wherein the sound display screen comprises: a substrate; the sounding film layer is arranged opposite to the substrate; the piezoelectric film layer is positioned on the surface of one side, facing the substrate, of the sounding film layer; the light-emitting structure is positioned on the surface of one side, facing the piezoelectric film layer, of the substrate; the piezoelectric isolation structure is positioned between the substrate and the piezoelectric film layer and positioned on the side part of at least part of the light-emitting structure, and comprises a piezoelectric isolation column and a second driving electrode connected with the piezoelectric isolation column; a second drive module on the substrate, the second drive module comprising: the device comprises a data receiving unit, a data processing unit and a data feedback unit. The service life of the sound display screen is prolonged.)

1. A sound-producing display screen, comprising:

a substrate;

the sounding film layer is arranged opposite to the substrate;

the piezoelectric film layer is positioned on the surface of one side, facing the substrate, of the sounding film layer;

the light-emitting structure is positioned on the surface of one side, facing the piezoelectric film layer, of the substrate;

the piezoelectric isolation structure is positioned between the substrate and the piezoelectric film layer and positioned on the side part of at least part of the light-emitting structure, and comprises a piezoelectric isolation column and a second driving electrode connected with the piezoelectric isolation column;

a second drive module on the substrate, the second drive module comprising: the piezoelectric isolation column comprises a data receiving unit, a data processing unit and a data feedback unit, wherein the data receiving unit is suitable for receiving a voltage output signal of the piezoelectric isolation column after the piezoelectric isolation column is vibrated by a piezoelectric film layer, the data processing unit is suitable for processing the voltage output signal and outputting a voltage feedback signal to the data feedback unit, the voltage feedback signal and the voltage output signal are opposite, and the data feedback unit is suitable for outputting the voltage feedback signal to a second driving electrode.

2. The sound-emitting display screen according to claim 1, wherein the piezoelectric film layer comprises a plurality of spaced sub-piezoelectric film layers, and the plurality of sub-piezoelectric film layers are arranged in an array; the number of the piezoelectric isolation structures is a plurality, and the piezoelectric isolation structures are positioned below the sub-piezoelectric film layers;

preferably, one or a plurality of light emitting structures are arranged between each sub-piezoelectric film layer and the substrate;

preferably, the sound production film layer is of a whole-face structure.

3. The sound-emitting display screen according to claim 1, wherein the piezoelectric film layer is of a full-face structure; the sounding film layer is of a whole-surface structure;

preferably, the orthographic projection of the piezoelectric film layer on the surface of the substrate falls inside the orthographic projection of the sounding film layer on the surface of the substrate;

preferably, the sound display screen further comprises: the support frame is positioned on the edge of the substrate and supports the sounding film layer and the substrate.

4. The sound-emitting display screen of claim 1, further comprising: the first electrode is positioned on the surface of one side, facing the sounding film layer, of the piezoelectric film layer, and the second electrode is positioned on the surface of one side, facing the substrate, of the piezoelectric film layer;

preferably, the sound display screen further comprises: the first driving module is positioned on the substrate and is electrically connected with the first electrode and the second electrode;

preferably, the piezoelectric film layer comprises a barium titanate ceramic film layer or a lead zirconate titanate ceramic film layer;

preferably, the thickness of the piezoelectric film layer is 50-400 μm;

preferably, the sound production film layer comprises a polyimide generation film layer;

preferably, the thickness of the sound production film layer is 100 to 300 μm.

5. The sound-emitting display screen of claim 1, wherein the second drive electrode comprises: the third electrode is positioned on the side wall of the piezoelectric isolation column; the fourth electrode is positioned between the piezoelectric film layer and the piezoelectric isolating column; the second driving module is electrically connected with the third electrode and the fourth electrode;

preferably, the piezoelectric isolation column comprises a barium titanate ceramic isolation column or a lead zirconate titanate ceramic isolation column;

preferably, the distance between adjacent piezoelectric isolation structures is 50-200 μm, the height of the piezoelectric isolation column is 100-150 μm, and the width of the piezoelectric isolation column is 5-15 μm;

preferably, the sound display screen further comprises: and the isolation packaging layer is positioned between the piezoelectric film layer and the fourth electrode.

6. The sounding display screen of claim 1, wherein a plurality of spaced strip-shaped fifth electrodes are disposed on a surface of a side of the substrate facing the piezoelectric film layer, a plurality of spaced strip-shaped sixth electrodes are disposed on a side of the fifth electrode facing away from the substrate, and an extending direction of the sixth electrodes is perpendicular to an extending direction of the fifth electrodes; the light emitting structure is positioned between part of the fifth electrode and part of the sixth electrode; the piezoelectric isolation structure is positioned on the side part of the sixth electrode and is spaced from the sixth electrode;

preferably, the sound display screen further comprises: the piezoelectric isolation structure faces the insulating layer on the surface of one side of the fifth electrode;

preferably, the sound display screen further comprises: and the packaging layer coats the side wall of the light-emitting structure and the sixth electrode.

7. The sounding display screen of claim 1, wherein a surface of the substrate facing the piezoelectric film layer is provided with fifth electrodes arranged in an array; the substrate is provided with a pixel limiting layer, the pixel limiting layer is provided with a pixel opening, and the pixel opening is positioned on the fifth electrode; the light emitting structure is positioned in the pixel opening; a sixth electrode is arranged on one side, back to the substrate, of the fifth electrode;

preferably, the piezoelectric isolation structure is positioned on the pixel defining layer at the side of the light emitting structure and spaced from the sixth electrode;

preferably, the piezoelectric isolation structure penetrates through the sixth electrode and is spaced from the sixth electrode;

preferably, the sound display screen further comprises: the insulating layer is positioned on the surface of one side, facing the substrate, of the piezoelectric isolation structure;

preferably, the sound display screen further comprises: and the packaging layer covers the sixth electrode and exposes the piezoelectric isolation structure.

8. A preparation method of a sound production display screen is characterized by comprising the following steps:

providing a substrate;

forming a light emitting structure on the substrate;

forming a piezoelectric isolation structure on the substrate, wherein the piezoelectric isolation structure is positioned at the side part of at least part of the light emitting structure; the step of forming the piezoelectric isolation structure comprises: forming a piezoelectric isolation pillar on the substrate and positioned at the side part of at least part of the light emitting structure; forming a second driving electrode connected with the piezoelectric isolation column;

arranging a piezoelectric film layer on one side of the piezoelectric isolation structure, which is back to the substrate;

a sounding film layer is arranged on the surface of one side, back to the substrate, of the piezoelectric film layer;

forming a second driving module on the substrate, the second driving module including: the piezoelectric isolation column comprises a data receiving unit, a data processing unit and a data feedback unit, wherein the data receiving unit is suitable for receiving a voltage output signal of the piezoelectric isolation column after the piezoelectric isolation column is vibrated by a piezoelectric film layer, the data processing unit is suitable for processing the voltage output signal and outputting a voltage feedback signal to the data feedback unit, the voltage feedback signal and the voltage output signal are opposite, and the data feedback unit is suitable for outputting the voltage feedback signal to a second driving electrode.

9. A method of operating a sound-generating display screen according to any one of claims 1 to 7, comprising:

driving the piezoelectric film layer to vibrate, wherein the piezoelectric film layer drives the sounding film layer to sound;

the piezoelectric isolation column outputs a voltage output signal to the data processing unit after being vibrated by the piezoelectric film layer;

the data processing unit processes the voltage output signal and outputs a voltage feedback signal to the data feedback unit, and the voltage feedback signal and the voltage output signal are opposite;

the data feedback unit outputs a voltage feedback signal to the second driving electrode.

10. A display device, comprising: a sound-generating display screen as claimed in any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of display screens, in particular to a sound production display screen, a manufacturing method and a working method thereof and a display device.

Background

With the increasing requirements of people on the quality and the use experience of electronic products, more and more functions are expected to be developed, for example, a sound-and-picture-integrated screen-down technology is realized. In order to realize a better under-screen sound emission effect at the present stage, the volume of the sound emission module is larger, the vibration caused by the under-screen sound emission also has a remarkable influence on the service life of the screen, the larger vibration may cause the damage of the light emitting unit to cause a bad point to cause a bad product, and the service life of the sound emission display screen is influenced, so that the service life of the sound emission display screen provided by the prior art is to be prolonged.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the problem of short service life of the sound display screen provided in the prior art, so as to provide a sound display screen, a manufacturing method and a working method thereof, and a display device.

The invention provides a sound display screen, comprising: a substrate; the sounding film layer is arranged opposite to the substrate; the piezoelectric film layer is positioned on the surface of one side, facing the substrate, of the sounding film layer; the light-emitting structure is positioned on the surface of one side, facing the piezoelectric film layer, of the substrate; the piezoelectric isolation structure is positioned between the substrate and the piezoelectric film layer and positioned on the side part of at least part of the light-emitting structure, and comprises a piezoelectric isolation column and a second driving electrode connected with the piezoelectric isolation column; a second drive module on the substrate, the second drive module comprising: the piezoelectric isolation column comprises a data receiving unit, a data processing unit and a data feedback unit, wherein the data receiving unit is suitable for receiving a voltage output signal of the piezoelectric isolation column after the piezoelectric isolation column is vibrated by a piezoelectric film layer, the data processing unit is suitable for processing the voltage output signal and outputting a voltage feedback signal to the data feedback unit, the voltage feedback signal and the voltage output signal are opposite, and the data feedback unit is suitable for outputting the voltage feedback signal to a second driving electrode.

Optionally, the piezoelectric film layer includes a plurality of sub-piezoelectric film layers spaced apart from each other, and the plurality of sub-piezoelectric film layers are arranged in an array; the number of the piezoelectric isolation structures is a plurality, and the piezoelectric isolation structures are located below the sub-piezoelectric film layers.

Optionally, one or several light emitting structures are arranged between each sub-piezoelectric film layer and the substrate.

Optionally, the sound production film layer is of a whole-surface structure.

Optionally, the piezoelectric film layer is of a whole-surface structure; the sounding film layer is of a whole-face structure.

Optionally, the orthographic projection of the piezoelectric film layer on the surface of the substrate falls inside the orthographic projection of the sounding film layer on the surface of the substrate.

Optionally, the sound display screen further comprises: the support frame is positioned on the edge of the substrate and supports the sounding film layer and the substrate.

Optionally, the method further includes: the first electrode is located on the surface of one side, facing the sounding film layer, of the piezoelectric film layer, and the second electrode is located on the surface of one side, facing the substrate, of the piezoelectric film layer.

Optionally, the sound display screen further comprises: and the first driving module is positioned on the substrate and is electrically connected with the first electrode and the second electrode.

Optionally, the piezoelectric film layer includes a barium titanate ceramic film layer or a lead zirconate titanate ceramic film layer.

Optionally, the thickness of the piezoelectric film layer is 50 μm to 400 μm.

Optionally, the sound generating film layer includes a polyimide generating film layer.

Optionally, the thickness of the sound production film layer is 100 μm to 300 μm.

Optionally, the second driving electrode includes: the third electrode is positioned on the side wall of the piezoelectric isolation column; the fourth electrode is positioned between the piezoelectric film layer and the piezoelectric isolating column; the second driving module is electrically connected with the third electrode and the fourth electrode.

Optionally, the piezoelectric isolation column includes a barium titanate ceramic isolation column or a lead zirconate titanate ceramic isolation column.

Optionally, the distance between adjacent piezoelectric isolation structures is 50 μm to 200 μm, the height of the piezoelectric isolation column is 100 μm to 150 μm, and the width of the piezoelectric isolation column is 5 μm to 15 μm.

Optionally, the sound display screen further comprises: and the isolation packaging layer is positioned between the piezoelectric film layer and the fourth electrode.

Optionally, a plurality of strip-shaped fifth electrodes are arranged on the surface of one side of the substrate, which faces the piezoelectric film layer, a plurality of strip-shaped sixth electrodes are arranged on the side of the fifth electrode, which faces away from the substrate, and the extending direction of the sixth electrodes is perpendicular to the extending direction of the fifth electrodes; the light emitting structure is positioned between part of the fifth electrode and part of the sixth electrode; the piezoelectric isolation structure is located on the side of the sixth electrode and spaced from the sixth electrode.

Optionally, the sound display screen further comprises: the piezoelectric isolation structure faces the insulating layer on the surface of one side of the fifth electrode.

Optionally, the sound display screen further comprises: and the packaging layer coats the side wall of the light-emitting structure and the sixth electrode.

Optionally, fifth electrodes arranged in an array are arranged on the surface of one side of the substrate, which faces the piezoelectric film layer; the substrate is provided with a pixel limiting layer, the pixel limiting layer is provided with a pixel opening, and the pixel opening is positioned on the fifth electrode; the light emitting structure is positioned in the pixel opening; and a sixth electrode is arranged on one side of the fifth electrode, which faces away from the substrate.

Optionally, the piezoelectric isolation structure is located on the pixel defining layer at the side of the light emitting structure and spaced from the sixth electrode.

Optionally, the piezoelectric isolation structure penetrates through the sixth electrode and is spaced from the sixth electrode;

optionally, the sound display screen further comprises: and the insulating layer is positioned on the surface of one side, facing the substrate, of the piezoelectric isolation structure.

Optionally, the sound display screen further comprises: and the packaging layer covers the sixth electrode and exposes the piezoelectric isolation structure.

The invention also provides a preparation method of the sounding display screen, which comprises the following steps: providing a substrate; forming a light emitting structure on the substrate; forming a piezoelectric isolation structure on the substrate, wherein the piezoelectric isolation structure is positioned at the side part of at least part of the light emitting structure; the step of forming the piezoelectric isolation structure comprises: forming a piezoelectric isolation pillar on the substrate and positioned at the side part of at least part of the light emitting structure; forming a second driving electrode connected with the piezoelectric isolation column; arranging a piezoelectric film layer on one side of the piezoelectric isolation structure, which is back to the substrate; a sounding film layer is arranged on the surface of one side, back to the substrate, of the piezoelectric film layer; forming a second driving module on the substrate, the second driving module including: the piezoelectric isolation column comprises a data receiving unit, a data processing unit and a data feedback unit, wherein the data receiving unit is suitable for receiving a voltage output signal of the piezoelectric isolation column after the piezoelectric isolation column is vibrated by a piezoelectric film layer, the data processing unit is suitable for processing the voltage output signal and outputting a voltage feedback signal to the data feedback unit, the voltage feedback signal and the voltage output signal are opposite, and the data feedback unit is suitable for outputting the voltage feedback signal to a second driving electrode.

The invention also provides a working method of the sound production display screen, which comprises the following steps: driving the piezoelectric film layer to vibrate, wherein the piezoelectric film layer drives the sounding film layer to sound; the piezoelectric isolation column outputs a voltage output signal to the data processing unit after being vibrated by the piezoelectric film layer; the data processing unit processes the voltage output signal and outputs a voltage feedback signal to the data feedback unit, and the voltage feedback signal and the voltage output signal are opposite; the data feedback unit outputs a voltage feedback signal to the second driving electrode.

The present invention also provides a display device including: the invention relates to a sound production display screen.

The technical scheme of the invention has the following beneficial effects:

1. according to the sounding display screen provided by the technical scheme, the piezoelectric film layer is arranged on the surface of one side, facing the substrate, of the sounding film layer, and the vibration of the piezoelectric film layer drives the sounding film layer to make a sound; the piezoelectric isolation structure is located between the substrate and the piezoelectric film layer and located on the side of at least part of the light-emitting structure, and comprises a piezoelectric isolation column and a second driving electrode connected with the piezoelectric isolation column. The second driving module includes: the piezoelectric isolation column comprises a data receiving unit, a data processing unit and a data feedback unit, wherein the data receiving unit is suitable for receiving a voltage output signal of the piezoelectric isolation column after the piezoelectric isolation column is vibrated by a piezoelectric film layer, and the data processing unit is suitable for processing the voltage output signal and outputting a voltage feedback signal to the data feedback unit. Because voltage feedback signal with voltage output signal is reverse, consequently data feedback unit is behind voltage feedback signal output to the second drive electrode, can make the piezoelectric isolation structure produce the vibration amplitude of micro-vibration in order to offset at least partial piezoelectricity rete, avoids the great vibration amplitude of piezoelectricity rete to make light-emitting structure receive the damage and cause the product bad, has improved the life-span of vocal display screen.

2. Furthermore, a plurality of sub-piezoelectric film layer is the array and arranges, a plurality of sub-sound production rete is the array and arranges, and sound generating mechanism is the dot matrix setting, and different regions send not equidimension sound, subregion sound production.

3. The display device provided by the technical scheme of the invention comprises the sound production display screen, so that the service life of the display device is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic cross-sectional structural diagram of a sound display screen according to an embodiment of the present invention;

fig. 2 is a schematic top view of a sound display screen according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structural view of a sound display screen according to another embodiment of the present invention;

fig. 4 is a schematic top view of a sound display screen according to another embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 and 2, fig. 2 is a top view of fig. 1, including:

a substrate 1;

a sounding film layer 2 arranged opposite to the substrate 1;

the piezoelectric film layer 3 is positioned on the surface of one side, facing the substrate 1, of the sounding film layer 2;

the light emitting structure 4 is positioned on the surface of one side, facing the piezoelectric film layer 3, of the substrate 1;

the piezoelectric isolation structure 5 is located between the substrate 1 and the piezoelectric film layer 3 and located on a side of at least part of the light emitting structure 4, and the piezoelectric isolation structure 5 includes a piezoelectric isolation column 501 and a second driving electrode connected to the piezoelectric isolation column 501;

a second driving module 8 on the substrate 1, the second driving module 8 comprising: the piezoelectric isolation column driving circuit comprises a data receiving unit 81, a data processing unit 82 and a data feedback unit 83, wherein the data receiving unit 81 is suitable for receiving a voltage output signal of the piezoelectric isolation column 501 after being vibrated by a piezoelectric film layer, the data processing unit 82 is suitable for processing the voltage output signal and outputting a voltage feedback signal to the data feedback unit, the voltage feedback signal and the voltage output signal are opposite, and the data feedback unit 83 is suitable for outputting the voltage feedback signal to a second driving electrode.

The voltage feedback signal and the voltage output signal are inverted to mean: when the voltage output signal is a positive value, the voltage feedback signal is a negative value, and when the voltage output signal is a negative value, the voltage feedback signal is a positive value. The absolute value of the voltage feedback signal and the absolute value of the voltage output signal are equal or unequal.

The substrate 1 is a flexible substrate, or the substrate is a rigid substrate, such as a glass substrate. The sounding film layer 2 is made of a flexible material such as polyimide.

The thickness of the sound generating film layer 2 is 100 μm to 300 μm, for example, 100 μm, 200 μm or 300 μm.

The piezoelectric film layer 3 includes a barium titanate ceramic film layer or a lead zirconate titanate ceramic film layer.

The thickness of the piezoelectric film layer 3 is 50 μm to 400 μm, for example, 50 μm, 100 μm, 200 μm, 300 μm, or 400 μm.

In this embodiment, the sounding film layer 2 is a whole structure, and the piezoelectric film layer 3 is a whole structure. The orthographic projection of the piezoelectric film layer 3 on the surface of the substrate is located inside the orthographic projection of the sounding film layer 2 on the surface of the substrate, and the area of the sounding film layer 2 is larger than that of the piezoelectric film layer 3. The edge area of the sounding film layer 2 beyond the piezoelectric film layer 3 is located on the support frame 11, and the support frame 11 is used for supporting the sounding film layer 2 and the substrate 1. The support bracket 11 is located at the edge of the substrate.

With reference to fig. 1, the first driving electrode includes a first electrode 601 and a second electrode 602, the first electrode 601 is located on a surface of the piezoelectric film layer 3 facing the sounding film layer 2, and the second electrode 602 is located on a surface of the piezoelectric film layer 3 facing the substrate 1. When the piezoelectric film layer 3 is of a full-face structure, the first electrode 601 is located at the edge surface of the piezoelectric film layer 3 facing the sounding film layer 2, and the second electrode 602 is located at the edge surface of the piezoelectric film layer 3 facing the substrate 1. The number of the first electrodes 601 may be one or several. The number of the second electrodes 602 may be one or several.

The substrate includes a non-display area 102, and the sound display screen further includes: a first driving module 13 is disposed on the substrate 1, the first driving module 13 is disposed on the non-display area 102, and the first driving module is electrically connected to the first electrode 601 and the second electrode 602. The first driving module is used for applying a first driving voltage to the upper surface and the lower surface of the piezoelectric film layer 3 through the first electrode 601 and the second electrode 602, so that the piezoelectric film layer 3 vibrates in the longitudinal direction, and the vibration of the piezoelectric film layer 3 drives the sounding film layer 2 to make a sound. The first electrode 601 and the second electrode 602 constitute a first drive electrode. The first driving electrode is adapted to apply a first driving voltage to the upper and lower surfaces of the piezoelectric film layer 3.

The sound display screen further comprises: and a third driving module 18 positioned on the non-display region of the substrate, the third driving module 18 being adapted to apply a driving voltage to the light emitting structure.

The first driving module 13, the second driving module 8 and the third driving module 18 may be integrated on the same chip, or may be independently disposed in different chips.

The light emitting structure 4 includes: a light emitting layer; a first carrier layer located between the light emitting layer and the substrate; and the second carrier layer is positioned on the surface of the light-emitting layer, which faces away from the substrate. The first carrier layer includes a first carrier injection layer, a first carrier transport layer between the first carrier injection layer and the light emitting layer, and a second carrier blocking layer between the first carrier transport layer and the light emitting layer. The second carrier layer comprises a second carrier injection layer, a second carrier transmission layer positioned between the second carrier injection layer and the light emitting layer, and a first carrier blocking layer positioned between the second carrier transmission layer and the light emitting layer.

When the first carrier is a hole, the second carrier is an electron. When the first carriers are electrons, the second carriers are holes. In this embodiment, when the first carrier is a hole, the second carrier is an electron.

With continued reference to fig. 1, the piezoelectric isolation structure 5 includes: a piezoelectric isolation column 501; a third electrode 502 located on the sidewall of the piezoelectric isolation column 501; and a fourth electrode 503 positioned between the piezoelectric film layer 3 and the piezoelectric isolation column 501. The second driving electrodes include a third electrode 502 and a fourth electrode 503.

The piezoelectric isolation column 501 includes a barium titanate ceramic isolation column or a lead zirconate titanate ceramic isolation column.

The pitch and size of the piezoelectric isolation structures 5 may be reasonably selected according to the size of the light emitting structure 4, and are not limited thereto, in this embodiment, the pitch between adjacent piezoelectric isolation structures 5 is 50 μm to 200 μm, for example, 50 μm, 100 μm, 150 μm, or 200 μm, the height of the piezoelectric isolation pillars 501 is 100 μm to 150 μm, for example, 100 μm, 120 μm, or 150 μm, and the width of the piezoelectric isolation pillars 501 is 5 μm to 15 μm, for example, 5 μm, 10 μm, or 15 μm.

Referring to fig. 2, the substrate 1 includes a non-display area 102, and the sound display panel further includes: a second driving module 8, wherein the second driving module 8 is disposed on the non-display area 102, and the second driving module 8 is electrically connected to the third electrode 502 and the fourth electrode 503 (a connection line is not shown in fig. 2). The display area of the substrate 1 is 101.

The second drive electrode is adapted to apply a voltage feedback signal to the top and bottom regions of the piezoelectric isolation column 501.

In another embodiment, referring to fig. 3 and fig. 4, fig. 4 is a top view of fig. 3, the piezoelectric film includes a plurality of spaced sub-piezoelectric film layers 301, and the plurality of sub-piezoelectric film layers 301 are arranged in an array; the number of the piezoelectric isolation structures 5 is several, and the piezoelectric isolation structures 5 are located below the sub-piezoelectric film layers 301. One or a plurality of light emitting structures 4 are arranged between each sub piezoelectric film layer 301 and the substrate 1. In the present embodiment, four light emitting structures 4 are provided below each sub-piezoelectric film layer 301. In other embodiments, there are other numbers of light emitting structures, such as 1, 2, 3, or more than 4, below each sub-piezoelectric film layer 301. The sounding film layer 2 is of a whole-face structure. The substrate 1 comprises a display area 101, and the sounding film layer 2, the piezoelectric film layer 3, the light-emitting structure 4 and the piezoelectric isolation structure 5 are located on the display area 101.

In this embodiment, the sound-emitting display screen is a passive matrix organic electroluminescent diode (PMOLED), a plurality of spaced strip-shaped fifth electrodes 9 are disposed on a surface of one side of the substrate 1 facing the piezoelectric film layer 3, a plurality of spaced strip-shaped sixth electrodes 10 are disposed on a side of the fifth electrode 9 facing away from the substrate 1, when the sound-emitting display screen is a top-emission passive matrix organic electroluminescent diode, the fifth electrodes 9 are cathodes, the sixth electrodes 10 are anodes, when the sound-emitting display screen is a bottom-emission passive matrix organic electroluminescent diode, the fifth electrodes 9 are anodes, and the sixth electrodes 10 are cathodes; the extending direction of the sixth electrode 10 is perpendicular to the extending direction of the fifth electrode 9; the light emitting structure 4 is located between a part of the fifth electrode 9 and a part of the sixth electrode 10; the piezoelectric isolation structure 5 is located at the side of the sixth electrode 10 and is spaced from the sixth electrode 10.

The sound display screen further comprises: the piezoelectric isolation structure 5 faces the insulating layer 7 on the surface of the fifth electrode 9. The insulating layer 7 prevents the electrical signal of the fifth electrode 9 from being applied to the piezoelectric isolation structure. The sound display screen further comprises: and the packaging layer 12 coats the side wall of the light-emitting structure 4 and the sixth electrode 10. The packaging layer 12 is used for isolating water and oxygen, preventing organic materials from being corroded and prolonging the service life of the sound display screen. In the present embodiment, the structure of the encapsulation layer 12 includes a composite layer structure of a first silicon nitride layer, a hexamethyldisiloxane layer, and a second silicon nitride layer, wherein the hexamethyldisiloxane layer is located between the first silicon nitride layer and the second silicon nitride layer. The sound display screen further comprises: and the isolation packaging layer 13 is positioned on the surface of one side, back to the substrate 1, of the piezoelectric isolation structure 5, and the material of the isolation packaging layer 13 is the same as that of the packaging layer 12.

In other embodiments, the sound-emitting display screen is an active organic electroluminescent diode (AMOLED), a surface of the substrate facing the piezoelectric film layer is provided with fifth electrodes arranged in an array, the fifth electrodes are anodes, the substrate is provided with a pixel defining layer, the pixel defining layer is provided with pixel openings therein, and the pixel openings are located on the fifth electrodes; the light emitting structure is positioned in the pixel opening; a sixth electrode is arranged on one side, back to the substrate, of the fifth electrode, and the sixth electrode is an anode; the light emitting structure is positioned between the fifth electrode and a part of the sixth electrode; the piezoelectric isolation structure is located on the pixel defining layer at the side of the light emitting structure and spaced from the sixth electrode, and preferably, the piezoelectric isolation structure penetrates through the sixth electrode and is spaced from the sixth electrode, so that the support performance of the piezoelectric isolation structure to the substrate and the piezoelectric film layer is improved. The sound display screen further comprises: the piezoelectric isolation structure faces the insulating layer on the surface of one side of the fifth electrode. The sound display screen further comprises: and the packaging layer covers the sixth electrode and exposes the piezoelectric isolation structure.

The working principle of the sound production display screen provided by the embodiment is as follows: the first driving voltage is applied to the upper surface and the lower surface of the piezoelectric film layer 3 through the first electrode 601 and the second electrode 602, the piezoelectric film layer 3 vibrates due to the property of converting electric energy into mechanical energy under the action of the first driving voltage, so that the piezoelectric film layer 3 is driven to vibrate to make sound, the piezoelectric isolation structure 5 is driven to vibrate while the sounding film layer 2 vibrates to make sound, the piezoelectric isolation structure 5 generates a voltage output signal due to the property of converting mechanical energy into electric energy and transmits the voltage output signal to the data receiving unit of the second driving chip through the third electrode 502 and the fourth electrode 503, the data processing is suitable for processing the voltage output signal and outputting the voltage feedback signal to the data feedback unit, the voltage feedback signal and the voltage output signal are opposite, and the data feedback unit outputs the voltage feedback signal to the second driving electrode, the piezoelectric isolation structure 5 generates micro-vibration under the action of the voltage feedback signal so as to offset the vibration amplitude of part of the piezoelectric film layer 3, so that the phenomenon that the light-emitting structure 4 is damaged by larger vibration amplitude to cause bad products is avoided, and the service life of the sound-emitting display screen is prolonged.

Another embodiment of the present invention further provides a method for manufacturing a sound display screen, including the following steps:

s1: a substrate is provided.

S2: a light emitting structure is formed on the substrate.

S3: forming a piezoelectric isolation structure on the substrate, wherein the piezoelectric isolation structure is positioned at the side part of at least part of the light emitting structure; the step of forming the piezoelectric isolation structure comprises: forming a piezoelectric isolation pillar on the substrate and positioned at the side part of at least part of the light emitting structure; and forming a second driving electrode connected with the piezoelectric isolation column.

S4: and a piezoelectric film layer is arranged on one side of the piezoelectric isolation structure, which is back to the substrate.

S5: and a sounding film layer is arranged on the surface of one side, back to the substrate, of the piezoelectric film layer.

S6: forming a second driving module on the substrate, the second driving module including: the piezoelectric isolation column comprises a data receiving unit, a data processing unit and a data feedback unit, wherein the data receiving unit is suitable for receiving a voltage output signal of the piezoelectric isolation column after the piezoelectric isolation column is vibrated by a piezoelectric film layer, the data processing unit is suitable for processing the voltage output signal and outputting a voltage feedback signal to the data feedback unit, the voltage feedback signal and the voltage output signal are opposite, and the data feedback unit is suitable for outputting the voltage feedback signal to a second driving electrode.

The substrate is described with reference to the foregoing embodiments and will not be described in detail.

The description of the light emitting structure refers to the contents of the foregoing embodiments and is not described in detail.

The description of the piezoelectric film layer refers to the content of the foregoing embodiments and is not described in detail.

The description of the sound generating film layer refers to the content of the foregoing embodiments and is not described in detail.

In one embodiment, before the light emitting structure is formed, a plurality of spaced strip-shaped fifth electrodes are formed on the substrate; the light emitting structure is positioned on a partial region of the fifth electrode; after the light emitting structure is formed, a plurality of strip-shaped sixth electrodes are formed at intervals on one side of the light emitting structure, which faces away from the fifth electrode, the extending direction of the sixth electrodes is perpendicular to the extending direction of the fifth electrodes, and the light emitting structure is located between a part of the fifth electrodes and a part of the sixth electrodes. Correspondingly, the sound-emitting display screen is a sound-emitting PMOLED display screen. In this case, after the fifth electrode, the light emitting structure and the sixth electrode are formed, a piezoelectric isolation structure is formed on the substrate, the piezoelectric isolation structure is positioned at the side of the sixth electrode and is spaced from the sixth electrode, and the piezoelectric isolation structure is also positioned on a part of the fifth electrode at the side of the light emitting structure; further, before the piezoelectric isolation structure, the method further comprises: forming an insulating layer on part of the fifth electrode on the side part of the light-emitting structure, and after forming the piezoelectric isolation structure, positioning the piezoelectric isolation structure between part of the fifth electrode and the insulating layer, wherein the insulating layer electrically isolates the fifth electrode from the piezoelectric isolation structure, so that the potential of the fifth electrode is prevented from being applied to the piezoelectric isolation column; after the piezoelectric isolation structure and the sixth electrode are formed, a packaging layer is formed, the packaging layer coats the side wall of the light-emitting structure and the sixth electrode, in the process of forming the packaging layer, an isolation packaging layer is formed on the surface of one side, back to the substrate, of the piezoelectric isolation pillar, the material of the isolation packaging layer is the same as that of the packaging layer, and the packaging layer and the isolation packaging layer are spaced and not continuous because the height of the piezoelectric isolation structure is larger than the total thickness of the light-emitting structure, the fifth electrode and the sixth electrode and have a certain difference value; after forming the packaging layer and the isolation packaging layer, forming a piezoelectric film layer; after the piezoelectric film layer is formed, a sounding film layer is formed.

In another embodiment, before the light emitting structure is formed, fifth electrodes arranged in an array are formed on the substrate; forming a pixel defining layer on the substrate, the pixel defining layer having a pixel opening therein, the pixel opening exposing the fifth electrode; forming a light emitting structure in the pixel opening on the fifth electrode; and after the light emitting structure is formed, forming a sixth electrode on the side, opposite to the fifth electrode, of the light emitting structure and the pixel defining layer, wherein the sixth electrode is provided with an isolation opening penetrating through the sixth electrode, the isolation opening is used for defining the position of the piezoelectric isolation column, and the isolation opening is positioned on the side part of the light emitting structure. Correspondingly, the sound production display screen is a sound production AMOLED display screen. In this case, after the fifth electrode, the light emitting structure and the sixth electrode are formed, a piezoelectric isolation structure is formed on the substrate, in particular, on a portion of the pixel defining layer, preferably, the piezoelectric isolation structure penetrates through the sixth electrode and is spaced apart from the sixth electrode, in particular, the piezoelectric isolation structure penetrates through the isolation opening; after the piezoelectric isolation structure and the sixth electrode are formed, a packaging layer is formed, the packaging layer covers the sixth electrode and exposes the piezoelectric isolation structure, an isolation packaging layer is formed on the surface of one side, back to the substrate, of the piezoelectric isolation pillar in the process of forming the packaging layer, the material of the isolation packaging layer is the same as that of the packaging layer, and the height of the piezoelectric isolation structure is larger than the total thickness of the light-emitting structure, the fifth electrode and the sixth electrode and has a certain difference value, so that the packaging layer and the isolation packaging layer are spaced and not continuous, and the packaging layer and the isolation packaging layer do not cover the surface of the side wall of the piezoelectric isolation pillar. Further, still include: after the light emitting structure is formed, an insulating layer is formed on a portion of the substrate, specifically, the insulating layer is formed on the portion of the pixel defining layer, and may be formed in the isolation opening after the sixth electrode is formed, or the insulating layer is formed on a portion of the pixel defining layer before the sixth electrode is formed, and the piezoelectric isolation structure is located on the insulating layer after the piezoelectric isolation structure is formed.

In this embodiment, the method of forming the piezoelectric film layer includes: arranging a plurality of sub-piezoelectric film layers at intervals on one side of the piezoelectric isolation structure, which is back to the substrate, wherein the plurality of sub-piezoelectric film layers are arrayed; the number of the piezoelectric isolation structures is a plurality, and the piezoelectric isolation structures are located below the sub-piezoelectric film layers. The sounding film layer is of a whole-face structure.

In other embodiments, the piezoelectric film layer and the sounding film layer are both of a full-face structure.

Another embodiment of the present invention further provides a working method of a sound display screen, including: driving the piezoelectric film layer to vibrate, wherein the piezoelectric film layer drives the sounding film layer to sound; the piezoelectric isolation column outputs a voltage output signal to the data processing unit after being vibrated by the piezoelectric film layer; the data processing unit processes the voltage output signal and outputs a voltage feedback signal to the data feedback unit, and the voltage feedback signal and the voltage output signal are opposite; the data feedback unit outputs a voltage feedback signal to the second driving electrode.

The invention further provides a display device which comprises the sound production display screen, so that the service life of the display device is prolonged.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.