CN114550611B

CN114550611B - Display panel, preparation method thereof, sounding control method and display device

Info

Publication number: CN114550611B
Application number: CN202210174034.7A
Authority: CN
Inventors: 韩艳玲; 曹永刚; 王雷; 姬雅倩; 勾越; 李倩岩
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2023-12-01
Anticipated expiration: 2042-02-24
Also published as: CN114550611A

Abstract

The embodiment of the disclosure provides a display panel, a preparation method thereof, a sounding control method and a display device. Wherein, the display panel includes: a control substrate; a plurality of pixel units positioned on one side of the control substrate facing the display; the sounding units are positioned on one side of the control substrate facing the pixel units, and each sounding unit is positioned between every two adjacent pixel units. The sounding control method comprises the following steps: identifying target images of preset sounding in each display subarea, wherein the display area of the display panel is divided into a plurality of display subareas; determining a target area where each target image is located; determining target sounding units in each target area; the control target sound generating unit generates a preset sound. According to the technical scheme, sounding can be realized only by a small area, and the sounding is not limited by the size and the material of the display panel; the audio-visual integration and stereophonic sound can be realized, and good listening experience is provided.

Description

Display panel, preparation method thereof, sounding control method and display device

Technical Field

The disclosure relates to the technical field of display, in particular to a display panel, a preparation method thereof, and a sounding control method and device of the display panel.

Background

In the prior art, the scheme of screen sounding is that a coil is attached to the rear of the screen to excite a vibrator, and the vibrator vibrates to drive the screen to vibrate, so that the screen sounding is pushed. The screen sounding technology of the distributed panel sounding is limited by the size and the material of the screen, has small subjective motility and needs special acoustic chamber design.

Disclosure of Invention

The embodiment of the disclosure provides a display panel, a preparation method thereof, a sounding control method and a display device, which are used for solving or relieving one or more technical problems in the prior art.

As a first aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a display panel including:

a control substrate;

a plurality of pixel units positioned on one side of the control substrate facing the display;

the sounding units are positioned on one side of the control substrate facing the pixel units, and each sounding unit is positioned between every two adjacent pixel units.

In some possible implementations, the sound generating unit includes:

a first electrode located at one side of the control substrate facing the pixel unit;

a retaining wall disposed along a circumferential edge of the first electrode, the retaining wall having a dimension greater than a dimension of the first electrode in a direction perpendicular to the control substrate;

The diaphragm layer is positioned on one side of the retaining wall, which is far away from the control substrate, and the diaphragm layer, the first electrode and the retaining wall are enclosed to form a cavity;

the second electrode is positioned on one side of the vibrating diaphragm layer, which is far away from the control substrate, and orthographic projections of the second electrode, the cavity and the vibrating diaphragm layer on the control substrate are at least partially overlapped.

In some possible implementations, the pixel unit includes a plurality of light emitting sub-pixels disposed at intervals, and the display panel further includes a positioning partition wall disposed between adjacent light emitting sub-pixels.

In some of the possible implementations of the present invention,

the size of the chamber in the direction parallel to the control substrate ranges from 300 μm to 1000 μm, the thickness of the diaphragm layer ranges from 8 μm to 12 μm, and the size of the chamber in the direction perpendicular to the control substrate ranges from 3 μm to 10 μm; or,

the dimension of the chamber in the direction parallel to the control substrate ranges from 100 μm to 500 μm, the thickness of the diaphragm layer ranges from 0.1 μm to 0.8 μm, and the dimension of the chamber in the direction perpendicular to the control substrate ranges from 1 μm to 5 μm.

In some possible implementations, the material of the retaining wall is a light shielding material.

In some possible implementations, the display device further includes a bonding layer between the retaining wall and the diaphragm layer, the diaphragm layer is adhered to an end face of one side of the retaining wall, which faces away from the control substrate, through the bonding layer, and the pixel unit is located between the control substrate and the bonding layer.

In some possible implementations, the pixel unit includes a plurality of light emitting sub-pixels disposed at intervals, and the display panel further includes a protective packaging layer, where the protective packaging layer is located on a side of the second electrode facing away from the control substrate and filled between adjacent light emitting sub-pixels, and the protective packaging layer located between the adjacent light emitting sub-pixels forms a positioning partition wall.

As a second aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a method for manufacturing a display panel, including:

a plurality of pixel units and a plurality of sounding units are formed on one side of the control substrate facing the display, and each sounding unit is located between every two adjacent pixel units.

In some possible implementations, forming a plurality of pixel units and a plurality of sound generating units on a display-facing side of the control substrate includes:

providing a control substrate, wherein one side of the control substrate facing the display is provided with a plurality of sub-pixel electrodes and a plurality of first electrodes which are positioned in each pixel unit, and each first electrode is positioned between adjacent pixel units;

forming a plurality of retaining walls on one side of the control substrate facing the display, wherein the retaining walls correspond to the first electrodes one by one, the retaining walls are arranged along the circumferential edges of the corresponding first electrodes, each retaining wall is positioned between adjacent pixel units, and the size of each retaining wall is larger than that of each first electrode in the direction perpendicular to the control substrate;

A plurality of light-emitting sub-pixels are arranged on one side of the control substrate facing the display, and the light-emitting sub-pixels are connected with the sub-pixel electrodes in a one-to-one correspondence manner;

forming a vibrating diaphragm layer on one side of the luminous sub-pixel and the retaining wall, which is far away from the control substrate, wherein a cavity is formed by surrounding the vibrating diaphragm layer, the first electrode and the retaining wall;

the bonding layer forms a plurality of second electrodes on one side of the vibrating diaphragm layer, which is away from the control substrate, the plurality of second electrodes are in one-to-one correspondence with the plurality of chambers, and orthographic projections of the corresponding first electrodes, chambers, vibrating diaphragm layers and second electrodes on the control substrate are at least partially overlapped, and the sounding unit comprises the first electrodes, the chambers, the vibrating diaphragm layers and the second electrodes.

In some possible implementations, a plurality of barriers are formed on the display-facing side of the control substrate, and a positioning partition is formed on the display-facing side of the control substrate, the positioning partition being located between adjacent sub-pixel electrodes.

In some possible implementations, forming a diaphragm layer on a side of the light emitting sub-pixels and the barrier wall facing away from the control substrate includes:

bonding an adhesive layer on one side of the luminous sub-pixel and one side of the retaining wall, which are away from the control substrate, wherein a cavity is formed by enclosing the adhesive layer, the first electrode and the retaining wall;

And sticking a vibrating diaphragm layer on one side of the bonding layer, which is far away from the control substrate.

forming a plurality of first insulating patterns on one side of the control substrate facing the display, wherein the first insulating patterns are positioned between adjacent pixel units, the first insulating patterns are in one-to-one correspondence with the first electrodes, and the orthographic projection of the first insulating patterns on the control substrate comprises the orthographic projection of the corresponding first electrodes on the control substrate;

forming a plurality of sacrificial patterns on one side of the first insulating patterns, which is away from the control substrate, wherein the sacrificial patterns correspond to the first insulating patterns one by one, the sacrificial patterns comprise cavity sacrificial patterns and auxiliary sacrificial patterns, the auxiliary sacrificial patterns surround the cavity sacrificial patterns, and the cavity sacrificial patterns and the auxiliary sacrificial patterns are communicated through connecting sacrificial patterns;

forming a plurality of second insulating patterns on one side of the sacrificial patterns, which is away from the control substrate, wherein the second insulating patterns are in one-to-one correspondence with the sacrificial patterns, the orthographic projection of the second insulating patterns on the control substrate comprises the orthographic projection of the corresponding sacrificial patterns on the control substrate, the size of the second insulating patterns is larger than that of the sacrificial patterns in the direction perpendicular to the control substrate, etching holes are formed in the second insulating patterns, and at least part of auxiliary sacrificial patterns are exposed out of the etching holes;

Forming a second electrode on a side of each second insulating pattern facing away from the control substrate, the second electrode, the chamber sacrificial pattern and the first electrode at least partially overlapping;

injecting etching liquid through the etching holes to remove the auxiliary sacrificial patterns and the cavity sacrificial patterns, wherein the positions of the cavity sacrificial patterns corresponding to the auxiliary sacrificial patterns form cavities;

and forming a protective packaging layer on one side of the second electrode, which is far away from the control substrate, wherein the protective packaging layer is filled between adjacent light-emitting sub-pixels and seals the etching holes.

As a third aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a sound emission control method of a display panel, which is applied to the display panel in any one of the embodiments of the present disclosure, the method including:

identifying target images of preset sounding in each display subarea, wherein the display area of the display panel is divided into a plurality of display subareas;

determining a target area where each target image is located;

determining target sounding units in each target area;

the control target sound generating unit generates a preset sound.

In some possible implementations, controlling the target sound generating unit to generate the preset sound includes:

And controlling the target sounding unit to make a preset sound according to the prestored audio signal.

determining target channels of each target area according to the stereo effect;

determining a target audio signal of a target sound generating unit according to the pre-stored audio signal and each target sound channel;

and controlling the target sounding unit to make a preset sound according to the target audio signal.

As a fourth aspect of embodiments of the present disclosure, embodiments of the present disclosure provide a sound emission control device of a display panel, which is applied to a display panel in any one of embodiments of the present disclosure, the sound emission control device including:

the target image recognition module is used for recognizing target images of preset sounding in each display subarea, and the display area of the display panel is divided into a plurality of display subareas;

the area determining module is used for determining the target area where each target image is located;

the sound generating unit determining module is used for determining target sound generating units in each target area;

and the sounding control module is used for controlling the target sounding unit to make a preset sound.

As a fifth aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a display device including a display panel in any of the embodiments of the present disclosure and a sound emission control device of the display panel in any of the embodiments of the present disclosure.

According to the technical scheme, the sounding unit is small in size, sounding can be achieved only by a small area, the sounding unit is not limited by the size and the material of the display panel, the application range is expanded, and finer sound and picture integration is facilitated; the images are matched with the sounds, so that the sound and picture integration and the stereo are realized, and the good listening experience is realized.

The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present disclosure will become apparent by reference to the drawings and the following detailed description.

Drawings

In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not to be considered limiting of its scope.

FIG. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the disclosure;

FIG. 2 is a schematic plan view of a display panel according to an embodiment of the disclosure;

FIG. 3 is a schematic cross-sectional view of a display panel according to another embodiment of the disclosure;

FIG. 4a is a schematic cross-sectional view of a control substrate in a display panel according to an embodiment of the disclosure;

FIG. 4b is a schematic cross-sectional view of a display panel according to an embodiment of the disclosure after forming a retaining wall material layer;

FIG. 4c is a schematic cross-sectional view of a display panel according to an embodiment of the disclosure after forming a retaining wall;

FIG. 4d is a schematic cross-sectional view of a display panel according to an embodiment of the disclosure after the light emitting sub-pixels are disposed;

FIG. 4e is a schematic cross-sectional view of a display panel according to an embodiment of the present disclosure after forming an adhesive layer;

FIG. 5a is a schematic cross-sectional view of a display panel according to an embodiment of the disclosure after forming a first insulating pattern;

FIG. 5b is a schematic cross-sectional view of the sacrificial pattern after formation in an embodiment of the present disclosure;

FIG. 5c is a schematic cross-sectional view of a display panel according to an embodiment of the disclosure after forming a second electrode;

FIG. 5d is a schematic cross-sectional view of a display panel according to an embodiment of the disclosure after forming a cavity;

FIG. 6 is a schematic diagram of a sounding control method of a display panel according to an embodiment of the disclosure;

FIG. 7 is a schematic diagram of an architecture of an acoustic parametric array system in an embodiment;

FIG. 8 is a block diagram illustrating a sound emission control device of a display panel according to an embodiment of the present disclosure;

Fig. 9 is a schematic diagram of a display device frame according to an embodiment of the disclosure.

Reference numerals illustrate:

10. a control substrate; 20. a pixel unit; 21. a light emitting sub-pixel; 22. a subpixel electrode; 30. a sound generating unit; 31. a first electrode; 32. a retaining wall; 321. a first insulating pattern; 322. a sacrificial pattern; 323. a second insulating pattern; 33. a diaphragm layer; 34. a second electrode; 35. a chamber; 36. a bonding layer; 40. positioning a partition wall; 50. and protecting the packaging layer.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways, and the different embodiments may be combined arbitrarily without conflict, without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

Fig. 1 is a schematic cross-sectional structure of a display panel according to an embodiment of the disclosure, fig. 2 is a schematic plan structure of the display panel according to an embodiment of the disclosure, and fig. 1 may be a schematic cross-sectional structure of A-A in fig. 2. As shown in fig. 1 and 2, the display panel may include a control substrate 10, a plurality of pixel units 20, and a plurality of sound emitting units 30. The plurality of pixel units 20 may be located on the display-facing side of the control substrate 10, the plurality of sounding units 30 may be located on the display-facing side of the control substrate 10, i.e., the plurality of sounding units 30 and the plurality of pixel units 20 are located on the display-facing side of the control substrate 10, and each sounding unit 30 is located between adjacent pixel units 20.

Note that, the control substrate 10 may include at least one thin film transistor corresponding to the pixel unit 20, and the control substrate 10 may be called an array substrate.

The pixel unit 20 may include a plurality of light emitting sub-pixels 21 arranged at intervals, and the color of light emitted from the light emitting sub-pixels 21 may be set as needed. The pixel unit 20 may include, for example, a red light emitting subpixel, a blue light emitting subpixel, and a green light emitting subpixel. The light emitting sub-pixels 21 may be Light Emitting Diode (LED) chips, or organic light emitting diode devices (OLEDs), or other devices that can emit light.

It should be noted that, in fig. 1 and fig. 2, the arrangement of the light emitting sub-pixels in the pixel unit 20 is only schematically shown, and those skilled in the art will understand that, in the display panel according to the embodiment of the disclosure, the arrangement of the light emitting sub-pixels in the pixel unit is not limited to the arrangement shown in fig. 1 and fig. 2, and the arrangement of the light emitting sub-pixels in the pixel unit may be set as required. In addition, fig. 2 shows a positional relationship between the sounding unit 30 and the pixel unit 20 in the horizontal direction, and in other embodiments, the sounding unit 30 may be disposed in other directions (e.g., the vertical direction in fig. 2), so long as the sounding unit 30 is located between adjacent pixel units 20, which is within the scope of the present disclosure.

In the display panel in the embodiment of the disclosure, the sounding unit 30 and the pixel unit 20 are located on the same side of the control substrate 10, and the sounding unit 30 is located between adjacent pixel units 20, so that the size of the sounding unit 30 corresponds to the interval size between the adjacent pixel units 20, the sounding unit 30 is small in size, sounding can be achieved only by a small area, the sounding is not limited by the size and the material of the display panel, the application range is expanded, and finer integration of sound and pictures is facilitated. In addition, the sounding units 30 are located between the adjacent pixel units 20, so that the space between the adjacent pixel units 20 can be filled, and the problem of pixel light mixing is solved.

In one embodiment, as shown in fig. 1, the sound emitting unit 30 may include a first electrode 31, a barrier wall 32, a diaphragm layer 33, and a second electrode 34.

As shown in fig. 1, the first electrode 31 may be located at a side of the control substrate 10 facing the pixel unit 20. In the process of preparing the control substrate 10, the sub-pixel electrode 22 and the first electrode 31 may be fabricated on the surface of the control substrate 10 facing the display side, and thus, the control substrate 10 may be provided with a plurality of sub-pixel electrodes 22 and a plurality of first electrodes 31 located within the range of each pixel unit 20 on the display side, each first electrode 31 being located between adjacent pixel units 20. The sub-pixel electrode 22 and the first electrode 31 may be formed using one process. When the LED chip is adopted in the light-emitting sub-pixel, the sub-pixel electrode can be an electrode pair, and two pins of the LED chip are respectively connected with two electrodes of the electrode pair. When the light emitting sub-pixel employs an OLED device, the sub-pixel electrode may be the anode of the OLED device.

As shown in fig. 1, the barrier wall 32 may be disposed along a circumferential edge of the first electrode 31, and a size of the barrier wall 32 may be larger than a size of the first electrode 31 in a direction perpendicular to the control substrate 10.

The diaphragm layer 33 may be located at a side of the barrier wall 32 away from the control substrate 10, as shown in fig. 1, and the diaphragm layer 33 may overlap the side of the barrier wall 32 away from the control substrate 10, so that the diaphragm layer 33, the first electrode 31, and the barrier wall 32 may enclose the chamber 35.

The second electrode 34 may be located on a side of the diaphragm layer 33 facing away from the control substrate 10, and the orthographic projections of the second electrode 34, the chamber 35 and the diaphragm layer 33 on the control substrate 10 at least partly overlap.

Illustratively, the orthographic projection of the second electrode 34 onto the control substrate 10 may be within the range of the orthographic projection of the chamber 35 onto the control substrate 10, as shown in fig. 1.

The sounding unit 30 with the structure is a capacitive micro-mechanical transducer (Microelectro Micro-machined Ultrasonic Transducer, CMUT) device, the sounding unit 30 of the device can realize directional sounding through an acoustic parametric array technology, the sounding performance is high, and sounding can be realized only by a small area. Under the condition that the ultrasonic sound pressure level of the array element surface is about 120dB, manufacturing an array of 40 x 50 as a sounding module can realize 70dB directional audible sound, and the area of the sounding module is smaller than 10cm calculated by the radius of the array element vibrating diaphragm of 200 mu m ² The sound production of an NB screen in the screen sound production technology of distributed flat panel sound production can be realizedEffects. Therefore, the display panel in the embodiment can realize finer sound and picture integration and provide sounding accuracy.

For the CMUT device, the vibration sound of the diaphragm layer 33 can be realized by applying a dc bias voltage and an ac drive voltage to the first electrode 31 and the second electrode 34.

In one embodiment, as shown in fig. 1, the diaphragm layer 33 of each CMUT device may be of an integral structure, the material of the diaphragm layer 33 may be a transparent material, and illustratively, the material of the diaphragm layer 33 may be transparent polyethylene terephthalate (PET), so that the diaphragm layer 33 does not affect the display of the display panel.

In one embodiment, as shown in fig. 1, the material of the second electrode 34 may be a transparent conductive material, such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO).

In one embodiment, as shown in fig. 1, the pixel unit 20 includes a plurality of light emitting sub-pixels 21 disposed at intervals, and the display panel may further include a positioning partition wall 40, and the positioning partition wall 40 may be located between adjacent light emitting sub-pixels 21. Illustratively, the light emitting sub-pixels 21 may be LED chips, and the positioning partition wall 40 may provide alignment for the LED chip mounting process, so as to ensure that each LED chip is disposed at a corresponding position.

In one embodiment, as shown in fig. 1, the material of the retaining wall 32 may be a light shielding material, such as a black resin material. Thus, the barrier wall 32 can prevent light mixing between adjacent pixel units 20, and improve display effect.

In one embodiment, as shown in fig. 1, the spacer walls 40 may be made of the same material as the retaining wall 32, and the spacer walls 40 may be formed with the retaining wall 32 by a single process, for example. The material of the positioning partition wall 40 may be a light shielding material, so as to prevent cross color between adjacent light emitting sub-pixels and further improve the display effect.

In one embodiment, as shown in fig. 1, the end surfaces of the retaining wall 32, the light emitting sub-pixel 21 and the positioning partition wall 40, which are far away from the control substrate 10, may be flush, so that the diaphragm layer 33 may be disposed on a flat end surface, thereby ensuring the flatness of the diaphragm layer 33, improving the consistency of each sounding unit 30, and improving the sounding effect.

In one embodiment, as shown in fig. 1, the display panel may further include an adhesive layer 36 disposed between the barrier wall 32 and the diaphragm layer 33, and the diaphragm layer 33 is adhered to an end surface of the barrier wall 32 facing away from the control substrate 10 by the adhesive layer 36, and the pixel unit 20 may be disposed between the control substrate 10 and the adhesive layer 36.

The diaphragm layer 33 can be manufactured in advance, and then the diaphragm layer 33 is adhered to the upper end face of the retaining wall 32 through the adhesive layer 36, so that the cavity 35 can be directly formed, the cavity 35 is not required to be formed by adopting an etching process of etching holes and etching liquid, the manufacturing process of the display panel is simplified, and the manufacturing efficiency is improved.

In one embodiment, as shown in fig. 1 and 2, the dimension of the chamber 35 in a direction parallel to the control substrate 10 may range from 300 μm to 1000 μm (inclusive), for example, the front projection of the chamber 35 on the control substrate 10 may be circular, and the radius of the chamber may range from 150 μm to 500 μm. The front projection of the chamber 35 on the control substrate 10 is not limited to a circle, and may be a regular or irregular shape such as a rectangle, an ellipse, or a polygon. The thickness of the diaphragm layer 33 may range from 8 μm to 12 μm (inclusive), and the size of the chamber 35 in a direction perpendicular to the control substrate 10 (i.e., the height of the chamber 35) may range from 3 μm to 10 μm (inclusive). The resonance frequency of the CMUT device may be 30kHz to 100kHz (inclusive), for example 40kHz. In practical implementations, the specific dimensions of the CMUT device may be set as desired.

Fig. 3 is a schematic cross-sectional structure of a display panel according to another embodiment of the disclosure. In one embodiment, as shown in fig. 3, the material of the retaining wall 32 and the diaphragm layer 33 may be the same in each CMUT device, and formed by a single process. The material of the barrier wall 32 and the diaphragm layer 33 may be at least one of silicon oxide, silicon nitride or silicon oxynitride. The pixel unit 20 includes a plurality of light emitting sub-pixels 21 disposed at intervals, and the display panel may further include a protective encapsulation layer 50, the protective encapsulation layer 50 being disposed at a side of the second electrode 34 facing away from the control substrate 10 and filled between adjacent light emitting sub-pixels 21. The protective encapsulation layer between adjacent light emitting sub-pixels 21 is a positioning partition wall 40. Illustratively, the material of the protective encapsulation layer 50 may be a resin material or Polydimethylsiloxane (PDMS). The protection encapsulation layer 50 may form a protection on the surface of the CMUT device.

In one embodiment, as shown in fig. 3, the dimension of the chamber 35 in a direction parallel to the control substrate 10 may range from 100 μm to 500 μm (inclusive), for example, the front projection of the chamber 35 on the control substrate 10 may be circular, and the radius of the chamber may range from 50 μm to 250 μm. The front projection of the chamber 35 on the control substrate 10 is not limited to a circle, and may be a regular or irregular shape such as a rectangle, an ellipse, or a polygon.

The thickness of the diaphragm layer 33 may range from 0.1 μm to 0.8 μm (inclusive), and the size of the chamber 35 in a direction perpendicular to the control substrate 10 (i.e., the height of the chamber 35) may range from 1 μm to 5 μm (inclusive). The resonance frequency of the CMUT device may be 30kHz to 100kHz (inclusive), for example 40kHz. In practical implementations, the specific dimensions of the CMUT device may be set as desired.

The embodiment of the disclosure also provides a method for manufacturing the display panel, which comprises the following steps: a plurality of pixel units and a plurality of sounding units are formed on one side of the control substrate facing the display, and each sounding unit is located between every two adjacent pixel units.

In one embodiment, forming a plurality of pixel units and a plurality of sound emitting units on a display-facing side of a control substrate may include: providing a control substrate, wherein one side of the control substrate facing the display is provided with a plurality of sub-pixel electrodes and a plurality of first electrodes which are positioned in each pixel unit, and each first electrode is positioned between adjacent pixel units; forming a plurality of retaining walls on one side of the control substrate facing the display, wherein the retaining walls correspond to the first electrodes one by one, the retaining walls are arranged along the circumferential edges of the corresponding first electrodes, each retaining wall is positioned between adjacent pixel units, and the size of each retaining wall is larger than that of each first electrode in the direction perpendicular to the control substrate; a plurality of light-emitting sub-pixels are arranged on one side of the control substrate facing the display, and the light-emitting sub-pixels are connected with the sub-pixel electrodes in a one-to-one correspondence manner; forming a vibrating diaphragm layer on one side of the luminous sub-pixel and the retaining wall, which is far away from the control substrate, wherein a cavity is formed by surrounding the vibrating diaphragm layer, the first electrode and the retaining wall; the bonding layer forms a plurality of second electrodes on one side of the vibrating diaphragm layer, which is away from the control substrate, the plurality of second electrodes are in one-to-one correspondence with the plurality of chambers, and orthographic projections of the corresponding first electrodes, chambers, vibrating diaphragm layers and second electrodes on the control substrate are at least partially overlapped, and the sounding unit comprises the first electrodes, the chambers, the vibrating diaphragm layers and the second electrodes.

In one embodiment, a plurality of barriers are formed on the display-facing side of the control substrate, and a positioning barrier is formed on the display-facing side of the control substrate, the positioning barrier being located between adjacent sub-pixel electrodes.

In one embodiment, a diaphragm layer is formed on a side of the light emitting sub-pixel and the retaining wall facing away from the control substrate, and the diaphragm layer includes: bonding an adhesive layer on one side of the luminous sub-pixel and one side of the retaining wall, which are away from the control substrate, wherein a cavity is formed by enclosing the adhesive layer, the first electrode and the retaining wall; and sticking a vibrating diaphragm layer on one side of the bonding layer, which is far away from the control substrate.

The method for manufacturing the display panel in one embodiment is described below by taking the display panel shown in fig. 1 as an example. It should be understood that, as used herein, the term "patterning" includes processes such as photoresist coating, mask exposure, development, etching, photoresist stripping, etc. when the patterned material is inorganic or metal, and processes such as mask exposure, development, etc. when the patterned material is organic, evaporation, deposition, coating, etc. are all well-known processes in the related art.

S11: the control substrate 10 is provided, and a plurality of sub-pixel electrodes 22 and a plurality of first electrodes 31 are disposed in the region of each pixel unit 20 on the display-facing side of the control substrate 10, wherein each first electrode 31 is disposed between adjacent pixel units 20, as shown in fig. 4a, and fig. 4a is a schematic cross-sectional view of the control substrate in the display panel according to an embodiment of the disclosure.

S12: and forming a plurality of retaining walls on one side of the control substrate, which faces the display, wherein the retaining walls correspond to the first electrodes one by one, the retaining walls are arranged along the circumferential edges of the corresponding first electrodes, each retaining wall is positioned between adjacent pixel units, and the size of each retaining wall is larger than that of each first electrode in the direction perpendicular to the control substrate. The process may include:

a retaining wall material layer 32' is formed on the display-facing side of the control substrate 10, as shown in fig. 4b, fig. 4b is a schematic cross-sectional view of the display panel according to an embodiment of the disclosure after the retaining wall material layer is formed. The material of the retaining wall material layer 32' may be black resin material.

The barrier material layer is processed by a patterning process, specifically, the barrier material layer 32' is subjected to mask exposure and development, the barrier material layer at the sub-pixel electrode 22 and the first electrode 31 is removed, a plurality of barriers 32 and positioning spacers 40 are formed, and the sub-pixel electrode 22 and the first electrode 31 are exposed, as shown in fig. 4c, fig. 4c is a schematic cross-sectional view of the display panel according to an embodiment of the disclosure after forming the barriers. The barriers 32 are in one-to-one correspondence with the first electrodes 31, the barriers 32 are disposed along the circumferential edges of the corresponding first electrodes 31, and the barriers 32 are located between the adjacent pixel units 20. The dimension of the barrier wall 32 is larger than the dimension of the first electrode 31 in a direction perpendicular to the control substrate 10. The positioning spacers 40 are located between adjacent sub-pixel electrodes 22. The retaining wall 32 and the spacer walls 40 may also serve as insulation to prevent shorting between adjacent electrodes.

S13: a plurality of light emitting sub-pixels 21 are disposed on a display-facing side of the control substrate 10, and the plurality of light emitting sub-pixels 21 are connected to the plurality of sub-pixel electrodes 22 in a one-to-one correspondence manner, as shown in fig. 4d, fig. 4d is a schematic cross-sectional view of the display panel according to an embodiment of the disclosure after the light emitting sub-pixels are disposed. Illustratively, the light emitting sub-pixels 21 may be LED chips, and the light emitting sub-pixels 21 may be disposed on the control substrate 10 using a die-casting process.

S14: and forming a vibrating diaphragm layer on one sides of the luminous sub-pixels and the retaining wall, which are far away from the control substrate, wherein a cavity is formed by surrounding the vibrating diaphragm layer, the first electrode and the retaining wall. The process may include:

an adhesive layer 36 is attached to one side of the light emitting sub-pixel 21 and the retaining wall 32, which is away from the control substrate 10, and the adhesive layer 36, the first electrode 31 and the retaining wall 32 enclose a cavity 35, as shown in fig. 4e, fig. 4e is a schematic cross-sectional view of the display panel according to an embodiment of the disclosure after the adhesive layer is formed.

A diaphragm layer 33 is attached to the side of the adhesive layer 36 facing away from the control substrate 10, as shown in fig. 1. The composite layer of the diaphragm layer 33 and the second electrode 34 may be previously prepared, and when the diaphragm layer 33 is bonded to the adhesive layer 36, the CMUT device is completed.

In this embodiment, the retaining wall 32 and the positioning partition wall 40 are formed and then the LED chip is disposed, so that the retaining wall 32 and the positioning partition wall 40 can play a role in positioning the LED chip when the LED chip is mounted, and the accuracy of mounting the LED chip is improved.

In another embodiment, the retaining wall 32 and the positioning partition wall 40 may be formed after the plurality of light emitting sub-pixels 21 are disposed at the display-facing side of the control substrate 10.

The method of manufacturing the display panel according to another embodiment is described below by taking the display panel shown in fig. 2 as an example. It should be understood that, as used herein, the term "patterning" includes processes such as photoresist coating, mask exposure, development, etching, photoresist stripping, etc. when the patterned material is inorganic or metal, and processes such as mask exposure, development, etc. when the patterned material is organic, evaporation, deposition, coating, etc. are all well-known processes in the related art.

S21: the control substrate 10 is provided, and the control substrate 10 is the same as the control substrate in step S11, and will not be described here again.

S22: a plurality of first insulating patterns 321 are formed on the display-facing side of the control substrate 10, the first insulating patterns 321 are located between the adjacent pixel units 20, the plurality of first insulating patterns 321 are in one-to-one correspondence with the plurality of first electrodes 31, and the orthographic projection of the first insulating patterns 321 on the control substrate 10 includes the orthographic projection of the corresponding first electrodes 31 on the control substrate 10, as shown in fig. 5a, fig. 5a is a schematic cross-sectional view of the display panel according to an embodiment of the disclosure after the first insulating patterns are formed.

S23: a plurality of sacrificial patterns 322 are formed on a side of the first insulating pattern 321 facing away from the control substrate 10, the plurality of sacrificial patterns 322 are in one-to-one correspondence with the plurality of first insulating patterns 321, the sacrificial patterns 322 include a cavity sacrificial pattern 322a and an auxiliary sacrificial pattern 322b, the auxiliary sacrificial pattern 322b surrounds the cavity sacrificial pattern 322a, the cavity sacrificial pattern 322a and the auxiliary sacrificial pattern 322b are communicated through a connection sacrificial pattern (not shown in the drawing), as shown in fig. 5b, and fig. 5b is a schematic cross-sectional view after the sacrificial pattern is formed in an embodiment of the present disclosure. The process may include:

the first sacrificial layer 51 is formed on a side of the first insulation pattern 321 facing away from the control substrate 10, specifically, a copper metal film may be deposited on a side of the first insulation pattern 321 facing away from the control substrate 10, and the copper metal film may be subjected to patterning treatment to form the first sacrificial layer 51, as shown in fig. 5 b.

A second sacrificial layer 52 is formed on the first sacrificial layer using an electroplating process, as shown in fig. 5 b.

In this way, a sacrificial pattern having a large thickness can be formed, so that a chamber having a large height can be obtained.

S24: a plurality of second insulating patterns 323 are formed on a side of the sacrificial patterns 322 facing away from the control substrate 10, the second insulating patterns 323 are in one-to-one correspondence with the sacrificial patterns 322, the orthographic projection of the second insulating patterns 323 on the control substrate 10 includes orthographic projection of the corresponding sacrificial patterns 322 on the control substrate 10, the second insulating patterns 323 have a larger size than the sacrificial patterns 322 in a direction perpendicular to the control substrate 10, the second insulating patterns 323 are provided with etching holes 323a, and the etching holes 323a expose at least part of the auxiliary sacrificial patterns 322b, as shown in fig. 5c, fig. 5c is a schematic cross-sectional view of the display panel according to an embodiment of the disclosure after forming the second electrodes.

S25: a second electrode 34 is formed at a side of each second insulation pattern 323 facing away from the control substrate 10, and the second electrode 34, the chamber sacrificial pattern 322a, and the first electrode 31 are at least partially overlapped, as shown in fig. 5 c.

S26: an etching solution is injected through the etching hole 323a to remove the cavity sacrificial pattern 322a and the cavity sacrificial pattern 322b, and the cavity 35 is formed at the position corresponding to the cavity sacrificial pattern 322a, as shown in fig. 5d, fig. 5d is a schematic cross-sectional view of the display panel after forming the cavity in an embodiment of the disclosure.

S27: a plurality of light emitting sub-pixels 21 are provided on the display-facing side of the control substrate 10, and the plurality of light emitting sub-pixels 21 are connected to the plurality of sub-pixel electrodes 22 in one-to-one correspondence, as shown in fig. 3.

S28: a protective encapsulation layer 50 is formed on a side of the second electrode 34 facing away from the control substrate 10, the protective encapsulation layer 50 being filled between adjacent light emitting sub-pixels 21 and closing the etched holes 323a, the protective encapsulation layer 50 being further filled at the auxiliary sacrificial pattern 322b as shown in fig. 3.

As shown in fig. 3, the second insulation pattern 323 located above the chamber 35 may be formed as a diaphragm layer of the CMUT device, and the first insulation pattern 321, the second insulation pattern 323 located at the circumferential edge of the first electrode 31 and the protective encapsulation layer 50 filled at the position of the auxiliary sacrificial pattern 322b may be formed as a blocking wall 32, i.e., the first insulation pattern 321, the second insulation pattern 323 and the protective encapsulation layer 50 located within the dotted line frame of the blocking wall 32 form the blocking wall 32 in fig. 3. The protective encapsulation layer 50 between adjacent light emitting sub-pixels 21 may be formed to locate the partition walls 40.

Illustratively, the first insulating pattern and the second insulating pattern may be at least one of silicon oxide, silicon nitride, and silicon oxynitride, and the protective encapsulation layer 50 may be a resin material or PDMS.

Fig. 6 is a schematic diagram of a sounding control method of a display panel according to an embodiment of the disclosure. The embodiment of the present disclosure also provides a sound emission control method of a display panel, as shown in fig. 6, where the sound emission control may be applied to the display panel in any embodiment of the present disclosure. The sound emission control method may include:

s61: identifying target images of preset sounding in each display subarea, wherein the display area of the display panel is divided into a plurality of display subareas;

s62: determining a target area where each target image is located;

s63: determining target sounding units in each target area;

s64: the control target sound generating unit generates a preset sound.

Illustratively, the display panel may include a display area and a bezel area located at a periphery of the display area. For the display panel in the embodiment of the present disclosure, the sounding units are located between adjacent pixel units, so the sounding units are also located in the display area.

The display area of the display panel may be divided into a plurality of display sub-areas according to a preset division standard, which may be set as needed.

The sound generating unit in the display panel in the embodiment of the disclosure may adopt a CMUT device, and the CMUT device may emit directional ultrasonic waves in an array, so that directional audible sounds may be demodulated, that is, the audible sounds are modulated onto an ultrasonic carrier wave and emitted into the air to demodulate high-directional audible sounds.

The principle of the CMUT transmitting sound waves is: when a direct voltage is applied between the upper electrode (second electrode 34) and the lower electrode (first electrode 31), the electrostatic force pulls the diaphragm toward the lower electrode, against which the residual tension in the diaphragm is opposed. If an alternating voltage with a mechanical resonance frequency is applied to the vibrating diaphragm, the vibrating diaphragm can generate displacement oscillation and push surrounding media to do work so as to generate a large amount of ultrasonic waves.

Illustratively, the directional sounding of the CMUT device may be achieved by acoustic parametric array techniques. The acoustic parametric array technology is that an audio signal is loaded on a CMUT device after being processed, the audio signal is transmitted into the air through the CMUT device, and two rows of ultrasonic waves with different frequencies generate nonlinear interaction in the air to demodulate audible sound. Nonlinear interaction, i.e. the difference between two rows of ultrasound waves of different frequencies, i.e. the frequency f= |f1-f2| of the demodulated audible sound; linear interaction, i.e. the sum of two rows of ultrasound waves of different frequencies, i.e. the frequency f=f1+f2 of the demodulated audible sound.

FIG. 7 is a schematic diagram of an architecture of an acoustic parametric array system in an embodiment. The audio signals f1 and f2 are modulated into two ultrasonic signals f1 and f2 after passing through a signal processing module; after sequentially passing through the power amplification module and the impedance matching circuit, the two ultrasonic signals f1 and f2 are respectively transmitted to the CMUT device array 1 and the CMUT device array 2, the CMUT device array 1 transmits ultrasonic waves with the frequency f1, the CMUT device array 2 transmits ultrasonic waves with the frequency f2, nonlinear interaction occurs between the ultrasonic waves with the two frequencies in air, audible sound is demodulated, and the frequency f= -f 1-f2 of the audible sound is the same.

In the embodiment of the disclosure, a plurality of sounding objects may exist in an image displayed on a display panel, target images of preset sounding in each display sub-area may be identified, a target area where each target image is located may be determined according to each target image, and then a target sounding unit in the target area may be determined, and the target sounding unit is controlled to generate preset sounds. Therefore, in the images displayed by the display panel, the images are matched with the sound, so that the effects of sound and picture integration and stereophonic sound are realized, and good listening experience is realized.

For example, a target image of a preset utterance in each display sub-area may be determined from a pre-stored audio signal and an image to be displayed. When the display device displays the image and sounds, the image to be displayed is predetermined, the audio signal is prestored, and the prestored audio signal has a corresponding relation with the sound generating object in the image to be displayed.

The target area is a position range of the target image in the display panel, and at least one target sound generating unit may exist in the target area. The target image, the target area and the target sound generating unit correspond to each other, and the pre-stored audio signal corresponds to the target image, so that the pre-stored audio signal has a corresponding relationship with the target sound generating unit.

In one embodiment, the control target sound generating unit generates a preset sound, including: and controlling the target sounding unit to make a preset sound according to the prestored audio signal. Therefore, the target sounding unit close to the target image can make preset sound matched with the target image, and the sound and the image are combined.

In one embodiment, the control target sound generating unit generates a preset sound, including: determining target channels of each target area according to the stereo effect; determining a target audio signal of a target sound generating unit according to the pre-stored audio signal and each target sound channel; and controlling the target sounding unit to make a preset sound according to the target audio signal.

Illustratively, the channels may be allocated according to a stereo effect, so as to determine a target channel of each target area; therefore, the target audio signal of the target sounding unit can be determined according to the pre-stored audio signal and each target sound channel, and further, the target sounding unit can be controlled to emit preset sound according to the target audio signal, so that a stereo effect is achieved.

In one embodiment, the sound emitting area in the display panel may be divided into a plurality of sound emitting sub-areas, each of which may contain one or more sound emitting units. One display sub-region may correspond to one or more sound emitting sub-regions.

Determining target sound emitting units within each target area may include: and determining a target sounding sub-area in each target area, and determining sounding units in the target sounding sub-areas as target sounding units.

The embodiment of the disclosure further provides a sound emission control device of a display panel, as shown in fig. 8, which may be applied to the display panel in any embodiment of the disclosure, where the sound emission control device may include: a target image recognition module 81 for recognizing a target image of a preset utterance in each display sub-area, the display area of the display panel being divided into a plurality of display sub-areas; the region determining module 82 is configured to determine a target region in which each target image is located; a sound generating unit determining module 83 for determining a target sound generating unit in each target area; the sounding control module 84 is configured to control the target sounding unit to generate a preset sound.

In one embodiment, the sounding control module may be configured to control the target sounding unit to make a preset sound according to a pre-stored audio signal.

In one embodiment, the sound emission control module may include: the sound channel determining submodule is used for determining target sound channels of all target areas according to the stereo effect; the audio signal determining submodule is used for determining target audio signals of the target sounding units according to the prestored audio signals and the target sound channels; and the sound control sub-module is used for controlling the target sound generating unit to generate preset sound according to the target audio signal.

The present disclosure also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the sound emission control method in the embodiments of the present disclosure.

The embodiments of the present disclosure also provide a display device, which may include the display panel in any embodiment of the present disclosure and the sound emission control device of the display panel in any embodiment of the present disclosure.

Fig. 9 is a schematic diagram of a display device frame according to an embodiment of the disclosure. As shown in fig. 9, the target image recognition module may recognize the target image after analyzing the image by using an image analysis technique; the area determining module determines a target area where the target image is located through positioning calculation; the sound generating unit determining module performs target recognition and determines a target sound generating unit.

The sound generation control module may include a vocal tract determination sub-module, an audio signal determination sub-module, and a sound generation control sub-module. The sound channel determining submodule can adopt a sound channel distribution technology to determine target sound channels of all target areas according to the stereo effect; the audio signal determining sub-module may determine a target audio signal of the target sound unit according to the pre-stored audio signal and each target channel; the sound control sub-module can control the target sound generating unit to generate preset sound according to the target audio signal, so that sound and picture matching is realized.

The sound control sub-module can adopt the acoustic parametric array technology to realize directional sound production, as shown in fig. 8.

According to the display device disclosed by the embodiment of the disclosure, the target area where each target image is located is determined according to each target image, so that the target sounding unit in the target area can be determined, and the target sounding unit is controlled to emit preset sound. Therefore, in the displayed image, the image is matched with the sound, so that the integration of sound and picture and stereo is realized, and good listening experience is realized.

The display device may be: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.

In the description of the present specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present disclosure.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present disclosure, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

In this disclosure, unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

The above disclosure provides many different embodiments or examples for implementing different structures of the disclosure. The components and arrangements of specific examples are described above in order to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present disclosure. Furthermore, the present disclosure may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

The above is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think of various changes or substitutions within the technical scope of the disclosure, which should be covered in the protection scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A display panel, comprising:

a control substrate;

the sounding units are positioned on one side of the control substrate facing the pixel units, and each sounding unit is positioned between the adjacent pixel units;

Wherein, the sound generating unit includes:

a first electrode located at a side of the control substrate facing the pixel unit;

the diaphragm layer is positioned on one side of the retaining wall, which is far away from the control substrate, and a cavity is formed by enclosing the diaphragm layer, the first electrode and the retaining wall;

the second electrode is positioned on one side of the vibrating diaphragm layer, which is away from the control substrate, and orthographic projections of the second electrode, the cavity and the vibrating diaphragm layer on the control substrate are at least partially overlapped.

2. The display panel of claim 1, wherein the pixel unit includes a plurality of light emitting sub-pixels arranged at intervals, the display panel further including positioning spacers between adjacent light emitting sub-pixels.

3. The display panel of claim 1, wherein the display panel comprises,

The size of the chamber in the direction parallel to the control substrate ranges from 100 μm to 500 μm, the thickness of the diaphragm layer ranges from 0.1 μm to 0.8 μm, and the size of the chamber in the direction perpendicular to the control substrate ranges from 1 μm to 5 μm.

4. The display panel of claim 1, wherein the material of the retaining wall is a light shielding material.

5. The display panel according to any one of claims 1 to 4, further comprising an adhesive layer between the retaining wall and the diaphragm layer, wherein the diaphragm layer is adhered to an end surface of the retaining wall facing away from the control substrate through the adhesive layer, and wherein the pixel unit is located between the control substrate and the adhesive layer.

6. The display panel according to any one of claims 1-4, wherein the pixel unit comprises a plurality of light emitting sub-pixels arranged at intervals, the display panel further comprises a protective encapsulation layer, the protective encapsulation layer is located on one side of the second electrode, which is away from the control substrate, and is filled between adjacent light emitting sub-pixels, and the protective encapsulation layer located between the adjacent light emitting sub-pixels forms a positioning partition wall.

7. A method for manufacturing a display panel, comprising:

forming a plurality of pixel units and a plurality of sounding units on one side of the control substrate facing display, wherein each sounding unit is positioned between adjacent pixel units;

wherein, form a plurality of pixel units and a plurality of sound generating unit in the one side that the orientation of control substrate shows, include:

providing the control substrate, wherein one side of the control substrate facing the display is provided with a plurality of sub-pixel electrodes and a plurality of first electrodes, wherein the sub-pixel electrodes and the first electrodes are positioned in each pixel unit, and each first electrode is positioned between adjacent pixel units;

forming a plurality of retaining walls on one side of the control substrate facing the display, wherein the retaining walls correspond to the first electrodes one by one, the retaining walls are arranged along the circumferential edges of the corresponding first electrodes, each retaining wall is positioned between adjacent pixel units, and the size of each retaining wall is larger than that of the first electrode in the direction perpendicular to the control substrate;

a plurality of light-emitting sub-pixels are arranged on one side of the control substrate facing the display, and the plurality of light-emitting sub-pixels are connected with the plurality of sub-pixel electrodes in a one-to-one correspondence manner;

Forming a vibrating diaphragm layer on one side of the light-emitting sub-pixel and one side of the retaining wall, which are away from the control substrate, wherein a cavity is formed by surrounding the vibrating diaphragm layer, the first electrode and the retaining wall;

the bonding layer is formed with a plurality of second electrodes on one side of the vibrating diaphragm layer, which is far away from the control substrate, the second electrodes are in one-to-one correspondence with the chambers, orthographic projections of the corresponding first electrodes, the chambers, the vibrating diaphragm layer and the second electrodes on the control substrate are at least partially overlapped, and the sounding unit comprises the first electrodes, the chambers, the vibrating diaphragm layer and the second electrodes.

8. The method of claim 7, wherein a plurality of barriers are formed on a display-facing side of the control substrate while a positioning partition is formed on the display-facing side of the control substrate, the positioning partition being located between adjacent sub-pixel electrodes.

9. The method of claim 7, wherein forming a diaphragm layer on the light emitting sub-pixel and a side of the wall facing away from the control substrate comprises:

bonding an adhesive layer on one side of the light-emitting sub-pixel and one side of the retaining wall, which is far away from the control substrate, wherein the adhesive layer, the first electrode and the retaining wall are enclosed to form the cavity;

And pasting the vibrating diaphragm layer on one side of the bonding layer, which is far away from the control substrate.

10. The method of claim 7, wherein forming a plurality of pixel units and a plurality of sound emitting units on a display-facing side of the control substrate comprises:

forming a plurality of first insulation patterns on one side of the control substrate facing the display, wherein the first insulation patterns are positioned between adjacent pixel units, the first insulation patterns are in one-to-one correspondence with the first electrodes, and the orthographic projection of the first insulation patterns on the control substrate comprises the orthographic projection of the corresponding first electrodes on the control substrate;

forming a plurality of sacrificial patterns on one side of the first insulating patterns, which is away from the control substrate, wherein the sacrificial patterns are in one-to-one correspondence with the first insulating patterns, the sacrificial patterns comprise cavity sacrificial patterns and auxiliary sacrificial patterns, the auxiliary sacrificial patterns surround the cavity sacrificial patterns, and the cavity sacrificial patterns and the auxiliary sacrificial patterns are communicated through connecting sacrificial patterns;

Forming a plurality of second insulation patterns on one side of the sacrificial patterns, which is far away from the control substrate, wherein the second insulation patterns are in one-to-one correspondence with the sacrificial patterns, the orthographic projection of the second insulation patterns on the control substrate comprises the orthographic projection of the corresponding sacrificial patterns on the control substrate, the size of the second insulation patterns is larger than that of the sacrificial patterns in the direction perpendicular to the control substrate, etching holes are formed in the second insulation patterns, and at least part of auxiliary sacrificial patterns are exposed out of the etching holes;

forming a second electrode on a side of each of the second insulating patterns facing away from the control substrate, the second electrode, the chamber sacrificial pattern, and the first electrode at least partially overlapping;

injecting etching liquid through the etching holes to remove the auxiliary sacrificial patterns and the cavity sacrificial patterns, wherein the positions corresponding to the cavity sacrificial patterns form cavities;

and forming a protective packaging layer on one side of the second electrode, which is far away from the control substrate, wherein the protective packaging layer is filled between the adjacent light-emitting sub-pixels and seals the etching holes.

11. A sound emission control method of a display panel, applied to the display panel of any one of claims 1 to 6, the method comprising:

determining a target area where each target image is located;

determining target sounding units in the target areas;

and controlling the target sounding unit to emit preset sound.

12. The method of claim 11, wherein controlling the target sound emitting unit to emit a preset sound comprises:

and controlling the target sounding unit to generate preset sound according to the prestored audio signal.

13. The method of claim 11, wherein controlling the target sound emitting unit to emit a preset sound comprises:

determining a target channel of each target area according to the stereo effect;

determining a target audio signal of the target sound generating unit according to the pre-stored audio signal and each target sound channel;

and controlling the target sounding unit to make preset sound according to the target audio signal.

14. A sound emission control device of a display panel, applied to the display panel of any one of claims 1 to 6, comprising:

the region determining module is used for determining a target region where each target image is located;

the sounding unit determining module is used for determining target sounding units in the target areas;

and the sounding control module is used for controlling the target sounding unit to emit preset sound.

15. A display device comprising the display panel according to any one of claims 1 to 6 and the sound emission control device of the display panel according to claim 14.

16. A non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the method of any one of claims 11-13.