CN118159097A

CN118159097A - Display panel, manufacturing method and display device

Info

Publication number: CN118159097A
Application number: CN202410571970.0A
Authority: CN
Inventors: 李瑶; 袁海江
Original assignee: HKC Co Ltd
Current assignee: HKC Co Ltd
Priority date: 2024-05-10
Filing date: 2024-05-10
Publication date: 2024-06-07
Anticipated expiration: 2044-05-10
Also published as: CN118159097B

Abstract

The application is applicable to the technical field of display, and provides a display panel, a manufacturing method and a display device. Through carrying out the modulation to first light emitting element's luminous frequency and intensity for first optoacoustic conversion layer can produce the vibration of predetermined frequency and intensity correspondingly, can not crowded area of screen, need not to run through the trompil, and sound production position is multiple spot distribution, solves the single problem of sound production position, obtains the sound wave of different directions through setting up the different positions of first optoacoustic conversion layer, improves the directionality of sound production.

Description

Display panel, manufacturing method and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel, a manufacturing method and a display device.

Background

A loudspeaker is a transducer device that converts an electrical signal into an acoustic signal based on the principle that an energized conductor is forced in a magnetic field. Specifically, the main structure of the speaker includes a voice coil and a magnet. When current passes through the voice coil, a magnetic field is generated, and the magnetic field interacts with the magnetic field of the magnet to generate thrust or suction force, so that the voice coil and a connected vibrator vibrate, and air is pushed to generate sound.

A disadvantage of conventional speakers is that the screen is perforated to allow sound waves to escape, otherwise the sound effect is greatly compromised. The open hole needs to open the space between the screen and the middle frame, which takes up the structure of the screen, so that the top frame cannot be quite good.

Furthermore, in conventional handsets, the earpiece is typically located at the top of the screen and the speaker is located at the lower bottom surface of the screen. When the earphone mode is adopted, the human ear must be close to the earphone position to receive the sound signal; the opening of the lower loudspeaker is the opening of the lower bottom surface of the mobile phone shell, the sound wave is downwards spread in a unidirectional way parallel to the screen, the directivity of the sound wave is poor, the use of a user is inconvenient, and the mobile phone is often required to be horizontally arranged.

Disclosure of Invention

The embodiment of the application aims to provide a display panel, which aims to solve the technical problems that the existing electronic product loudspeaker occupies a screen structure, and has single sounding position and poor directivity.

The embodiment of the application is realized in that a display panel comprises:

The driving backboard comprises a plurality of driving elements which are arranged in an array manner;

The anode layer comprises a plurality of anodes which are arranged in an array and are respectively connected with the driving element;

the pixel limiting layer comprises a plurality of pixel limiting blocks which are respectively arranged between the anodes;

the luminous functional layer comprises a plurality of luminous material blocks which are respectively arranged on the anodes; and

A cathode layer including a plurality of cathodes disposed on the block of light emitting material;

Further comprises:

a plurality of first light emitting elements provided in the pixel defining layer;

the first photoacoustic conversion material layer is arranged on one side of the driving backboard, which is away from the anode layer, and is used for receiving light rays from the first light-emitting element.

In one embodiment, the photoacoustic conversion material layer includes a plurality of first photoacoustic conversion parts, which are disposed corresponding to the first light emitting elements.

In one embodiment, the first photoacoustic conversion material layer includes a plurality of first photoacoustic conversion parts provided corresponding to the respective anodes, and a plurality of first optical members provided corresponding to the respective first light emitting elements, the first optical members being for guiding light from the first light emitting elements to the first photoacoustic conversion parts adjacent thereto.

In one embodiment, the first optical member includes at least one of a reflective element, a refractive element, and a diffractive element; or the first optical member includes a polarizing beam splitter, a quarter wave plate, and a reflecting plate laminated in this order along a direction from the cathode to the anode, and a polarizing beam splitting film is provided on a diagonal surface of the polarizing beam splitter.

In one embodiment, a plurality of first optical members are provided corresponding to one first light emitting element, and each first optical member is used for guiding light to the first photoacoustic conversion part in different directions; the first light receiving surface of the first photoacoustic conversion part is inclined to the surface of the anode.

In one embodiment, the drive backplate comprises a drive layer comprising a plurality of the drive elements and a plurality of drive traces; the driving element is connected with the anode;

The first pin of the first light-emitting element is connected with the cathode, and the second pin of the first light-emitting element is connected with the other driving wire; or the first pin and the second pin of the first light-emitting element are respectively connected with different driving wires.

In one embodiment, the pixel defining block includes a bottom insulating block, a conductive block and a top insulating block, which are sequentially stacked along the direction from the anode to the cathode, and the conductive block connects two adjacent cathodes; the conductive block is provided with an avoidance opening, and the first light-emitting element is arranged in the avoidance opening and on the bottom insulating block.

In one embodiment, the display panel further includes a plurality of second light emitting elements disposed within the pixel defining layer;

The display panel further includes:

The color resistance layer comprises a plurality of color resistance blocks and is arranged on one side of the cathode, which is away from the anode;

the black matrix layer comprises a plurality of shielding blocks and is arranged between the color blocks; and

The second photoacoustic conversion material layer comprises a plurality of second photoacoustic conversion parts which are respectively positioned on one side of the shielding block facing the second light emitting element.

Another object of an embodiment of the present application is to provide a method for manufacturing a display panel, including:

forming a driving backboard and a first photoacoustic conversion layer positioned on the back surface of the driving backboard;

Forming an anode layer on the front surface of the driving backboard to obtain a plurality of anodes arranged in an array;

forming a pixel defining layer to obtain a plurality of pixel defining blocks connected with each other; and forming a first light emitting element within the pixel defining block;

Forming a block of light-emitting material on each of the anodes;

a cathode is formed on the block of light emitting material between the pixel defining blocks.

It is still another object of the embodiments of the present application to provide a display device including the display panel according to the above embodiments.

The display panel, the manufacturing method and the display device provided by the embodiment of the application have the beneficial effects that:

In the display panel, the first light emitting element is arranged in the pixel limiting block, the first photoacoustic conversion layer is correspondingly arranged below the driving backboard, and the first photoacoustic conversion layer can correspondingly generate vibration with preset frequency and intensity by modulating the light emitting frequency and intensity of the first light emitting element, so that sound waves are formed in the whole of the display panel. The first light-emitting element is arranged at a position avoiding the pixel area, and the first photoacoustic conversion layer is arranged below the driving backboard and does not occupy the screen area on the display panel, namely the display area; secondly, no holes are needed to penetrate through the display panel, and the extremely narrow design of the frame is not affected; thirdly, the sounding positions are distributed in multiple points, so that a user can receive sound waves from multiple positions, and the problem of inconvenient use caused by single sounding position is avoided; fourth, can realize the different vibration directions of first optoacoustic conversion layer through setting up the different positions of first optoacoustic conversion layer, and then obtain the sound wave of different directions, can improve the directionality of sounding, avoided the inconvenient problem of use that single direction takes place to bring.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic cross-sectional view of a display panel according to a first embodiment of the present application;

fig. 2 is a schematic cross-sectional view of a display panel according to a second embodiment of the present application;

Fig. 3 is a schematic top view of a display panel according to a second embodiment of the present application;

fig. 4 is a schematic cross-sectional view of a display panel according to a third embodiment of the present application;

Fig. 5 is a schematic top view of a display panel according to a third embodiment of the present application;

fig. 6 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the present application;

fig. 7 is a schematic cross-sectional view of a display panel according to a fifth embodiment of the present application;

Fig. 8 is a schematic cross-sectional view of a display panel according to a sixth embodiment of the present application;

fig. 9 is a schematic structural view of a first photoacoustic conversion layer in a display panel according to a sixth embodiment of the present application;

Fig. 10 is another schematic structural view of a first photoacoustic conversion layer in a display panel according to a sixth embodiment of the present application;

Fig. 11 is a schematic view of still another structure of a first photoacoustic conversion layer in a display panel according to a sixth embodiment of the present application;

Fig. 12 is a schematic view of still another structure of the first photoacoustic conversion layer in the display panel according to the sixth embodiment of the present application;

fig. 13 is a schematic diagram of an arrangement structure of a first photoacoustic conversion layer in a display panel according to a sixth embodiment of the present application;

Fig. 14 is a schematic view of another arrangement structure of a first photoacoustic conversion layer in a display panel according to a sixth embodiment of the present application;

fig. 15 is a schematic structural diagram of a display panel according to a seventh embodiment of the present application;

Fig. 16 is a schematic top view of a display panel according to a seventh embodiment of the present application;

Fig. 17 is a schematic top view of a display panel according to a seventh embodiment of the present application;

fig. 18 is a flowchart illustrating steps of a method for fabricating a display panel according to an eighth embodiment of the present application;

Fig. 19 is a flowchart illustrating steps of a method for manufacturing a display panel according to a ninth embodiment of the present application;

fig. 20 is a schematic structural view of a display device according to a tenth embodiment of the present application.

The meaning of the labels in the figures is:

100-a display panel;

1-a driving backboard, 11-a substrate base plate and 12-a driving layer;

2-anode layer, 21-anode;

3-pixel defining layers, 30-pixel defining blocks, 31-bottom insulating blocks, 32-conductive blocks, 33-top insulating blocks; 4-a light-emitting functional layer, 41-a block of light-emitting material;

5-cathode layer, 51-cathode, 510-avoiding port;

61-a flat layer, 62-an encapsulation layer, 63-a support layer, 64-a cover plate, 65-an optical adhesive layer;

71-black matrix layer, 711-shielding block;

75-color resistance layer, 751-color resistance block;

81-a first photoacoustic conversion layer 811-a first photoacoustic conversion part, 8100-a first light receiving surface, 812-a first optical member, 8121-a reflection element, 8122-a refractive element, 8123-a diffractive element, 8124-a polarizing beam splitter, 81240-a polarizing beam splitter film, 8125-a quarter wave plate, 8126-a reflection sheet; 810-connection;

85-a second photoacoustic conversion layer, 851-a second photoacoustic conversion part, 852-a second optical member;

91-first light emitting element, 911-first pin, 912-second pin;

95-a second light emitting element;

x-thickness direction, Y-length direction, Z-width direction;

200-display device, 300-housing.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly or indirectly mounted or disposed on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper," "lower," "left," "right," and the like are used for convenience of description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present patent. The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.

In order to explain the technical scheme of the application, the following is a detailed description with reference to the specific drawings and embodiments.

Referring to fig. 1, the embodiment of the application first provides a display panel 100, which includes a driving back plate 1, a pixel defining layer 3, an anode layer 2, a light emitting function layer 4, and a cathode layer 5. Specifically, the driving back plate 1 includes a plurality of driving elements (not shown), the pixel defining layer 3 includes pixel defining blocks 30 connected to each other along a length direction Y and a width direction Z (please refer to fig. 1 and 3 in combination) of the display panel 100, pixel regions (not shown) are defined between the pixel defining blocks 30, and the pixel defining blocks 30 are disposed corresponding to the driving elements; the anode layer 2 comprises a plurality of anodes 21 which are arranged in an array, are respectively arranged in the pixel areas and are connected with each driving element; the light emitting functional layer 4 includes a plurality of light emitting material blocks 41 respectively provided on the anodes 21 between the pixel defining blocks 30; the cathode layer 5 comprises a plurality of cathodes 51, each disposed on a block 41 of luminescent material between the pixel defining blocks 30.

The light-emitting functional layer 4 is made of an organic light-emitting material. When a certain voltage is applied between the anode 21 and the cathode 51, the light emitting material block 41 can emit light. Wherein the organic light emitting material is classified into red (R), green (G) and blue (B) organic materials, and red, green and blue light can be emitted, respectively. The light emitted from the organic light-emitting material is emitted through the light-transmitting cathode 51 to form a display screen.

In this embodiment, as shown in fig. 1, the display panel 100 further includes a plurality of first light emitting elements 91 and a first photo-acoustic conversion layer 81, the first light emitting elements 91 are respectively disposed in the pixel defining blocks 30, the first photo-acoustic conversion layer 81 is disposed below the driving back plate 1, that is, on a side facing away from the anode layer 2, and the first light emitting elements 91 emit light in a direction of the first photo-acoustic conversion layer 81.

The first light emitting element 91 emits light toward the first photoacoustic conversion layer 81, and the first photoacoustic conversion layer 81 is made of a photoacoustic material. The photoacoustic material has a photoacoustic effect, which means that when one material (absorber) is irradiated with periodically modulated light, the material absorbs the light and generates an acoustic signal having the same frequency as the modulation frequency of the incident light, and the intensity of the acoustic signal increases as the absorption intensity of the sample increases.

Accordingly, when the first light emitting element 91 is controlled to emit light at a predetermined frequency and intensity by a control module (not shown), the first photoacoustic conversion layer 81 can correspondingly generate vibrations (expansion and contraction) of the predetermined frequency and intensity, thereby generating mechanical waves. The mechanical wave is conducted out of the display panel 100, i.e., an acoustic wave is formed.

In the display panel 100 provided in the embodiment of the present application, the first light emitting element 91 is disposed in the pixel defining block 30, the first photo-acoustic conversion layer 81 is disposed correspondingly below the driving back plate 1, and the first photo-acoustic conversion layer 81 can correspondingly generate vibration with predetermined frequency and intensity by modulating the light emitting frequency and intensity of the first light emitting element 91, so that an acoustic wave is formed in the whole of the display panel 100. First, the first light emitting element 91 is disposed at a position avoiding the pixel region, and the first photo-acoustic conversion layer 81 is disposed below the driving back plate 1, so as not to occupy the screen area on the display panel 100, that is, the display area; secondly, no hole is required to be formed through the display panel 100, so that the extremely narrow design of the frame is not affected; thirdly, the sounding positions are distributed in multiple points, so that a user can receive sound waves from multiple positions, and the problem of inconvenient use caused by single sounding position is avoided; fourth, can realize the different vibration directions of first opto-acoustic conversion layer 81 through setting up the different positions of first opto-acoustic conversion layer 81, and then obtain the sound wave of different directions, can improve the directionality of sounding, avoided the inconvenient problem of use that single direction takes place to bring.

Here, the longitudinal direction Y and the width direction Z are directions perpendicular to each other on the light emitting surface of the display panel 100 when the user uses the display panel 100, that is, when the user faces the light emitting side of the display panel 100. In addition, in the present application, the thickness direction X of the display panel 100 is also defined, and as shown in fig. 1 and 2, the thickness direction X, the length direction Y, and the width direction Z of the display panel 100 are perpendicular to each other.

The above-described stacked structure of the anode 21, the light-emitting material block 41, and the cathode 51 is an organic light-emitting diode, and red (R), green (G), and blue (B) pixels are respectively configured.

The photoacoustic material can be a metal/metal composite material, such as a composite material formed by at least two of a gold nano-pore film/lead molybdate (PbMoO)/tellurium dioxide (TeO)/gallium phosphide (GaP) crystal; alternatively, the photoacoustic material may be a carbon nanocomposite such as a carbon fiber-polydimethylsiloxane composite film, a carbon nanotube-polydimethylsiloxane composite film, or the like.

The first light emitting element 91 may be a micro light emitting diode, which has a diameter of 1 micron to 10 microns, and is smaller than or equal to the length and width of the pixel defining block 30.

In this embodiment, the first light emitting element 91 may be disposed around each anode 21, that is, the first light emitting element 91 and the first photoacoustic conversion layer 81 may be uniformly disposed throughout the display panel 100. Thus, the entire sound emission on the surface of the display panel 100 can be realized. The user may receive sound waves without having to purposely approach certain areas while using the display panel 100.

Of course, the first light emitting element 91 and the first photoacoustic conversion layer 81 may not necessarily be formed around each anode 21, i.e., may be formed only on a partial region or a plurality of regions of the display panel 100, depending on the specific design. For example, the first light emitting element 91 and the first photoacoustic conversion layer 81 may be provided correspondingly only at the peripheral edge positions on the entire display panel 100; or the first light emitting element 91 and the first photoacoustic conversion layer 81 may be provided only in the upper half region or the lower half region or the like; or the first light emitting element 91 and the first photoacoustic conversion layer 81 may be provided at only one side, both side edge positions. The more set positions may be set according to actual product requirements, which is only an example.

Referring to fig. 6 and 7, in one embodiment, the first light emitting element 91 emits light toward the first photoacoustic conversion layer 81 along the thickness direction X of the display panel 100, that is, the first photoacoustic conversion layer 81 faces the first light emitting element 91, and the first photoacoustic conversion layer 81 has a first light receiving surface 8100 parallel to the surface of the cathode 51 and facing the first light emitting element 91. As such, when the first light emitting element 91 emits an optical signal in the thickness direction X of the display panel 100 at a predetermined frequency and intensity, the first photoacoustic conversion layer 81 correspondingly generates vibration in the thickness direction X, and eventually, the acoustic wave appears to be conducted in the thickness direction X of the display panel 100. When the user uses the display panel 100, the entire screen can transmit out sound waves toward the user.

Wherein, as shown in fig. 6, the first photo-acoustic conversion layer 81 may be of a whole layer design, that is, the first photo-acoustic conversion layer 81 includes a first photo-acoustic conversion portion 811, the first photo-acoustic conversion portion 811 being provided corresponding to the pixel defining block 30 and to the anode 21 at the same time. The first photoacoustic conversion layer 81 of the whole layer design is convenient in film formation manufacturing.

Or as shown in fig. 7, the first photo-acoustic conversion layer 81 includes first photo-acoustic conversion portions 811 and connection portions 810, the first photo-acoustic conversion portions 811 being provided corresponding to the pixel defining blocks 30 and the first light emitting elements 91, and the connection portions 810 being provided between adjacent first photo-acoustic conversion portions 811, being provided corresponding to the anodes 21, for planarizing the first photo-acoustic conversion layer 81 and reducing the use of photo-acoustic conversion materials.

In further embodiments, the connection 810 described above may be eliminated.

Referring to fig. 8 again, in one embodiment, the first photo-acoustic conversion layer 81 includes a first photo-acoustic conversion portion 811 and a first optical member 812, the first photo-acoustic conversion portion 811 is disposed corresponding to the anode 21, and the first optical member 812 is disposed corresponding to the pixel defining block 30 for receiving the light from the first light emitting element 91 and guiding the light to the adjacent first photo-acoustic conversion portion 811. The purpose of this design is that in the display panel 100, the area of the pixel region is larger than that of the pixel defining block 30, and thus, a larger area and space are available for disposing the photoacoustic conversion material, thereby being more advantageous for increasing the volume value of sound emission of the display panel 100.

When the light of the first light emitting element 91 is incident on the first light receiving surface 8100 so as to be substantially perpendicular to the first light receiving surface 8100, the first light receiving surface 8100 of the first photoacoustic conversion part 811 vibrates obliquely with respect to the thickness direction X of the display panel 100, and thus an acoustic wave obliquely with respect to the thickness direction X of the display panel 100 can be generated.

The form of the first optical member 812 is not limited, and any form capable of redirecting and guiding the light of the first light emitting element 91 to the adjacent first photoacoustic conversion part 811 may be applied thereto.

For example, referring to fig. 9, in one embodiment, the first optical member 812 is a reflective element 8121, with a reflective surface for reflecting light.

Alternatively, as shown in fig. 10, in one embodiment, the first optical member 812 is a refractive element 8122 for refracting light.

In one embodiment, as shown in fig. 11, the first optical member 812 is a diffraction element 8123 that diffracts light.

In an alternative embodiment, the first optical component 812 may also be a combination of various elements, such as a combination of a reflective element 8121 and a refractive element 8122, or a combination of a reflective element 8121 and a diffractive element 8123, etc.

As shown in fig. 12, in one embodiment, the first optical member 812 includes a polarizing beam splitter 8124, a quarter wave plate 8125, and a reflecting plate 8126 stacked in this order, and a polarizing beam splitting film 81240 is disposed at a diagonal position of the polarizing beam splitter 8124, and forms an angle of 45 degrees with a light incident path. Specifically, the polarizing beam splitter film 81240 of the polarizing beam splitter 8124 has a transmission effect on light in the first polarization direction (left and right polarization in fig. 12), has a reflection effect on light in the second polarization direction (polarization perpendicular to the first polarization direction, and perpendicular to the paper surface in fig. 12), and the quarter wave plate 8125 can convert linearly polarized light into circularly polarized light and circularly polarized light into linearly polarized light, and the reflection plate 8126 does not change the polarization type of light, but only changes the rotation direction of circularly polarized light. In this way, after the incident light passes through the polarization splitting film 81240, the quarter wave plate 8125, the reflecting plate 8126, and the quarter wave plate 8125 in this order, the polarization direction is rotated by 90 degrees, and the incident light cannot be transmitted through the polarization splitting film 81240, but is reflected. Thus, the propagation direction of the light is changed by 90 degrees.

The first light emitting element 91 is configured to emit linearly polarized light of a first polarization direction or to emit light rays containing linearly polarized light of the first polarization direction.

As shown in fig. 13, 14, one or more first optical members 812 may be provided at positions corresponding to the pixel defining blocks 30 to guide the light of the first light emitting element 91 to the first photoacoustic conversion parts 811 of different directions, thereby generating sound waves of a plurality of directions.

Specifically, as shown in fig. 13, the first optical members 812 guide light to both sides in the length direction (or width direction) of the display panel 100, respectively. In this way, the display panel 100 can sound toward both sides in the length direction Y (or the width direction Z).

Or as shown in fig. 14, the four first optical members 812 guide light rays to propagate toward both sides along the length direction Y of the display panel 100 and to propagate toward both sides along the width direction Z, respectively, so that four first photoacoustic conversion portions 811 therearound generate vibrations, respectively. In this manner, the display panel 100 can emit sound waves in four directions of up, down, left, and right.

In this embodiment, referring to fig. 1,2 and 4, the driving back plate 1 includes a driving layer 12 and one or more layers of substrate 11 disposed below the driving layer 12. The driving element is formed on the driving layer 12. The driving layer 12 further includes a plurality of driving traces (not shown), the driving element is a thin film transistor, and has a gate, a source and a drain, the gate is connected to one of the driving traces (gate lines), and the source is connected to the other driving trace (source line); the anode 21 is connected to the drain.

The substrate 11 may be a flexible substrate, such as a flexible plastic substrate; but may also be a rigid substrate such as a glass substrate or the like.

As shown in fig. 2 and 3, the first light emitting element 91 has a first pin 911 and a second pin 912, wherein the first pin 911 of the first light emitting element 91 is connected to the cathode 51 to be maintained at the same potential as the cathode 51, and thus, the first pin 911 of the first light emitting element 91 has a fixed reference voltage; the second pin 912 of the first light emitting element 91 may be connected to the driving layer 12, in particular a third driving trace, through which a control voltage is provided for the first light emitting element 91.

Next, referring again to fig. 1, 2 and 4, the pixel defining block 30 includes a bottom insulating block 31, a conductive block 32 and a top insulating block 33 stacked in this order in the direction from the anode 21 to the cathode 51; the conductive block 32 connects two adjacent cathodes 51, and is configured to electrically connect the cathode layers 5 together, so that a voltage is applied to one side of the cathode layers 5, that is, the voltage is simultaneously applied to each cathode 51. The top insulating block 33 is made of a light-transmitting material. The bottom insulating block 31 is made of a light-transmitting material.

Specifically, referring to fig. 3, the conductive block 32 is provided with a relief opening 510, the relief opening 510 exposes a portion of the surface of the bottom insulating block 31, and the first light emitting element 91 is disposed in the relief opening 510 and on the bottom insulating block 31. In this way, the first light emitting element 91 may be substantially co-layered with the conductive block 32, so as to facilitate connection of the first pin 911 and the conductive block 32, and at the same time, the avoiding opening 510 may facilitate the second pin 912 to avoid the conductive block 32 and keep an insulation interval with the conductive block 32.

The relief opening 510 may be a continuous hole in the inner peripheral wall or a discontinuous hole in the inner peripheral wall provided at the edge of the conductive block 32, as shown in fig. 3.

Or as shown in fig. 4 and 5, the first pin 911 and the second pin 912 of the first light emitting element 91 are connected to different driving wires (third and fourth) respectively.

Referring to fig. 1, in the present embodiment, the display panel 100 further includes a flat layer 61 and an encapsulation layer 62 sequentially stacked on the cathode 51 and the pixel defining block 30. The flat layer 61 is provided on the pixel defining block 30 and the cathode 51 having non-uniform heights, and the upper surface thereof is a flat surface; the encapsulation layer 62 is provided on the flat layer 61 through a flat surface, and clamps and fixes the underlying layer structures as one body together with the drive back plate 1.

Next, referring to fig. 15, in one embodiment, the display panel 100 further includes a color resist layer 75 and a black matrix layer 71, where the color resist layer 75 and the black matrix layer 71 are disposed on the encapsulation layer 62. The color resist layer 75 includes a plurality of color resist blocks 751, and the color resist blocks 751 correspond to the respective light-emitting material blocks 41; the black matrix layer 71 includes a plurality of shielding blocks 711 respectively provided between the color blocks 751 for separating the adjacent color blocks 751. The color block 751 includes a red (R), a green (G) and a blue (B) color block, respectively corresponding to red, green and blue organic materials.

In this embodiment, the display panel 100 further includes a plurality of second light emitting elements 95 and a second photo-acoustic conversion layer 85, and the second photo-acoustic conversion layer 85 includes a plurality of second photo-acoustic conversion portions 851 respectively disposed between the color blocking blocks 751 and located at a side of the shielding block 711 facing the first light emitting elements 91; the second light emitting element 95 is provided in the pixel defining block 30, and emits light toward the second photoacoustic conversion part 851.

When the light emission frequency and intensity of the second light emitting element 95 are modulated, the second photoacoustic conversion layer 85 can be made to generate vibration of a predetermined frequency and intensity, respectively. And, the screen area on the display panel 100 is not occupied, and holes penetrating the display panel 100 are not needed.

It should be noted that, the cathode 51 in the organic light emitting diode is a semi-transparent and semi-reflective film, besides self-luminescence of the organic light emitting material, external natural light also irradiates the light emitting surface of the display panel 100, and the light enters the display panel 100 and then is reflected from the cathode 51, and the light reflected from the cathode 51 in this portion may cause great interference to imaging, reduce contrast of the picture, and so on.

In this embodiment, the R/G/B color block has high transmittance (60% maximum) to the spectrum of the R/G/B pixel, respectively, and has large absorption to other bands. Since the ambient light generally includes the entire visible light band, that is, the ambient light is a wide spectrum band, most of the bands in the ambient light can be filtered out by the R/G/B color block, and the intensity of the emitted light of the display panel 100 is less affected by the ambient light, so that the contrast of the picture can be ensured. In this way, it is no longer necessary to provide a structure for filtering ambient light such as a circular polarizer on the light-emitting side of the cathode 51. Also, the thickness of the color resist layer 75 is small (smaller than that of the circularly polarizing plate), and the thickness of the display panel 100 is not significantly increased.

Further, the positions of the first light emitting element 91 and the second light emitting element 95 may be corresponding, that is, the first light emitting element 91 and the second light emitting element 95 are simultaneously disposed within the same pixel defining block 30, as shown in fig. 15. In other alternative embodiments, the positions of the first light emitting element 91 and the second light emitting element 95 may be partially corresponding and partially non-corresponding, for example, a portion of the pixel defining block 30 may have the first light emitting element 91 and the second light emitting element 95 disposed therein at the same time, and another portion of the pixel defining block 30 may have only the first light emitting element 91 disposed therein or only the second light emitting element 95 disposed therein. In other alternative embodiments, the positions of the first light emitting element 91 and the second light emitting element 95 may be non-corresponding, with only the first light emitting element 91 being disposed within a portion of the pixel defining block 30 and only the second light emitting element 95 being disposed within another portion of the pixel defining block 30.

The second light emitting element 95 may be a micro light emitting diode with a diameter of 1 micron to 10 microns.

The first light emitting element 91 and the second light emitting element 95 may be independently controlled, that is, the light emitting frequency and intensity of the first light emitting element 91 and the light emitting frequency and intensity of the second light emitting element 95 are controlled by predetermined signals. Or the first light emitting element 91 and the second light emitting element 95 are arranged in parallel or in series, and the light emitting frequencies and intensities of the two are the same.

With continued reference to fig. 15, in this embodiment, a supporting layer 63 may be further disposed between the color blocking layer 75 and the encapsulation layer 62. This is because, in the actual process, the color resist layer 75 and the black matrix layer 71 may be formed on the support layer 63, that is, a color film substrate including the support layer 63, the color resist layer 75 and the black matrix layer 71 may be manufactured, and then the entire color film substrate may be abutted with the encapsulation layer 62.

The support layer 63 may optionally be a rigid layer, such as a glass layer.

In other alternative embodiments, the support layer 63 may be a flexible layer formed on the encapsulation layer 62, and the color resist layer 75 and the black matrix layer 71 are formed on the flexible layer; alternatively, the support layer 63 may be omitted, that is, the corresponding color resist layer 75 and black matrix layer 71 may be formed directly on the encapsulation layer 62.

With continued reference to fig. 15, the display panel 100 further includes a cover plate 64 disposed above the color resist layer 75, and an optical adhesive layer 65 disposed between the cover plate 64 and the color resist layer 75, wherein the optical adhesive layer 65 is used for bonding and fixing the color resist layer 75, the black matrix layer 71 and the cover plate 64 together, and the cover plate 64 is used as a protective layer of an outermost layer of the display panel 100, and is used for protecting an internal structure of the display panel 100 while allowing light to pass through.

The direction of the second light receiving surface 8510 of the second photoacoustic conversion part 851 determines the vibration direction of the second photoacoustic conversion layer 85.

For example, as shown in fig. 16, in one embodiment, the second light receiving surface 8510 faces the second light emitting element 95. When the second light emitting element 95 emits an optical signal in the thickness direction X of the display panel 100 at a predetermined frequency and intensity, the second photoacoustic conversion part 851 correspondingly generates vibration in the thickness direction X, and finally, the acoustic wave appears in the thickness direction X of the display panel 100.

Specifically, the thickness of the second photoacoustic conversion part 851 is smaller than the thickness of the black matrix layer 71, and the length (and/or width) of the second photoacoustic conversion part 851 may be equal to the length (and/or width) of the black matrix layer 71; or as shown in fig. 11 to 13, the length (and/or width) of the second photoacoustic conversion part 851 is smaller than the length (and/or width) of the black matrix layer 71.

In an alternative embodiment, as shown in fig. 16, the second photoacoustic conversion part 851 is embedded in the shielding block 711, and both ends of the second photoacoustic conversion part 851 in the length direction Y (or both ends in the width direction Z) are spaced apart from the color blocking blocks 751 on both sides by a certain distance. The purpose of this arrangement is that the vibration of the second photoacoustic conversion part 851 acts entirely on the shielding block 711, not directly on the color block 751, and the influence that the vibration of the second photoacoustic conversion part 851 may have on the position or shape of the color block 751 can be reduced.

Referring to fig. 17, in one embodiment, the second light receiving surface 8510 of the second photoacoustic conversion part 851 is inclined to the surface of the cathode 51, and the display panel 100 further includes a second optical member 852 for guiding the light of the second light emitting element 95 to the second light receiving surface 8510. The second photoacoustic conversion part 851 generates vibrations oblique to the thickness direction X of the display panel 100, and thus can generate acoustic waves oblique to the thickness direction X of the display panel 100.

A plurality of (e.g., two, three, four, two shown in fig. 17) second photo-acoustic conversion sections 851 are disposed in the shielding block 711 at annular intervals, respectively adjacent to the adjacent color blocking blocks 751, the mutually adjacent sides of the plurality of second photo-acoustic conversion sections 851 being their respective second light receiving faces 8510; the second optical member 852 is provided between the second photoacoustic conversion sections 851. The light is incident into the space separated between the second photoacoustic converting parts 851, and the second optical member 852 adjusts the direction of the light in the space so that the light is incident onto the two second light receiving surfaces after being converted into the propagation direction.

The connection between the first pin 911 and the second pin 912 of the second light emitting element 95 may refer to the first light emitting element 91, and will not be described again.

Referring to fig. 18, an embodiment of the present application further provides a method for manufacturing a display panel, which includes:

in step S0, the driving back plate 1, and the first photoacoustic conversion layer 81 located on the back surface of the driving back plate 1 are formed.

Specifically, a substrate 11 is provided, a plurality of driving wirings and a plurality of driving elements are formed on one side surface of the substrate 11, the gate of the driving element is connected to one of the driving wirings (gate lines), and the source is connected to the other driving wiring (source line); a first photoacoustic conversion layer 81 is formed on the other side surface of the substrate base plate 11.

In step S1, an anode layer 2 is formed on the front surface of the driving back plate 1, so as to obtain a plurality of anodes 21 arranged in an array.

Wherein each anode 21 is connected to the drain of the driving element, respectively, and the voltage on the source line is transferred to each anode 21 via the on and off of the driving element.

Step S2, forming a pixel limiting layer 3 to obtain a plurality of pixel limiting blocks 30 connected with each other; and, the first light emitting element 91 is formed within the pixel defining block 30.

The anode 21 is located in the pixel region between the pixel defining blocks 30.

In step S3, a block 41 of light-emitting material is formed on each anode 21.

In step S4, the cathode 51 is formed on the light emitting material block 41 between the pixel defining blocks 30.

In step S5, an encapsulation layer 62 is formed on the cathode 51 and the pixel defining layer 3.

In one embodiment, in step S0, the first photoacoustic conversion layer 81 is designed as a whole layer; or the first photoacoustic conversion layer 81 includes first photoacoustic conversion portions 811 corresponding to the first light emitting elements 91, and connection portions 810 provided between the first photoacoustic conversion portions 811; or the first photo-acoustic conversion layer 81 includes first photo-acoustic conversion portions 811 corresponding to the anode 21, and first optical members 812 corresponding to the first light emitting elements 91 provided between the first photo-acoustic conversion portions 811.

Specifically, in one embodiment, the pixel defining block 30 includes a bottom insulating block 31, a conductive block 32, and a top insulating block 33, which are stacked in this order in the direction from the anode 21 to the cathode 51. Therefore, in step S2, the forming of the pixel defining layer 3 includes, in order:

step S21 of forming bottom insulating blocks 31, the bottom insulating blocks 31 being connected to each other in the longitudinal direction Y and the width direction Z of the display panel 100 to surround and separate the anodes 21;

in step S22, the conductive block 32 is formed on the underlying insulating block 31.

Each conductive block 32 connects adjacent two cathodes 51 such that the cathode layers 5 are connected to each other in the length direction Y and the width direction Z of the display panel 100;

in one embodiment, in step S22, the conductive block 32 is provided with a relief 510 to expose a portion of the underlying insulating block 31. And, the provision of the escape openings 510 does not affect the electrical connection between the adjacent two cathodes 51.

In step S23, after the conductive blocks 32 are formed, the plurality of first light emitting elements 91 are disposed at the escape openings 510 of each conductive block 32.

In step S24, top insulating blocks 33 are formed on the conductive blocks 32 and the first light emitting element 91, and the top insulating blocks 33 are connected to each other in the length and width directions Z of the display panel 100. The top insulating block 33 is made of a light-transmitting material.

In this manner, the pixel defining blocks 30 are connected to each other along the length direction Y and the width direction Z of the display panel 100, surround the anode electrode 21, and define a plurality of grooves over the anode electrode 21.

In step S3, the block of luminescent material 41 is positioned in the recess and on the anode 21.

In step S4, each cathode 51 is positioned on the light emitting material block 41, and adjacent two cathodes 51 are connected by the conductive block 32.

In one embodiment, in step S23, the plurality of first light emitting elements 91 are transferred onto the underlying insulating block 31 and into the avoiding openings 510 by batch transfer.

In one embodiment, referring to fig. 19, the method for manufacturing the display panel further includes:

in step S2, forming a second light emitting element 95 within the pixel defining block 30;

And step S6 of forming the second photoacoustic conversion layer 85, the black matrix layer 71, and the color resistance layer 75. The black matrix layer 71 includes a plurality of shielding blocks 711 corresponding to the pixel defining blocks 30, and the second photo-acoustic conversion layer 85 includes a plurality of second photo-acoustic conversion sections 851 located at a side of the shielding blocks 711 facing the pixel defining blocks 30; the color resist layer 75 includes a plurality of color resist blocks 751 disposed between the shielding blocks 711.

Specifically, in one embodiment, the step S6 of forming the second photoacoustic conversion layer 85 specifically includes:

In step S61, the second photoacoustic conversion part 851 is formed on the encapsulation layer 62 at least at a part of the positions corresponding to the pixel defining layer 3.

In step S62, a black matrix layer 71 is formed on the encapsulation layer 62, so as to obtain a plurality of shielding blocks 711 arranged in an array, each shielding block 711 corresponds to the pixel defining layer 3 and covers the second photoacoustic conversion part 851.

In step S63, a color resist layer 75 is formed on the encapsulation layer 62, and a plurality of color resist blocks 751 are obtained between the shielding blocks 711.

Further, after step S8, an optical adhesive layer 65 and a cover plate 64 are formed on the color resist layer 75 and the black matrix layer 71.

Or in one embodiment, the steps S61 to S63 described above are replaced with:

Step S61' of providing the support layer 63, forming the second photo acoustic conversion section 851 and the black matrix layer 71 on the support layer 63;

step S62' of forming a color resist layer 75 on the black matrix layer 71 to obtain a plurality of color resist blocks 751 located between the black matrix layers 71;

In step S63', the supporting layer 63 is abutted against the encapsulation layer 62, and the second photo acoustic conversion portion 851 corresponds to the second light emitting element 95 in the pixel defining layer 3.

Referring to fig. 20, the embodiment of the application further provides a display device 200, which includes the display panel 100 described in the above embodiments. In addition, the display device 200 further includes a housing 300 disposed at the periphery of the display panel 100, where the housing 300 is used to protect the display panel 100 and expose the light emitting surface of the display panel 100.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims

1. A display panel, comprising:

Further comprises:

2. A display panel as claimed in claim 1, characterized in that the photoacoustic conversion material layer comprises a plurality of first photoacoustic conversion parts provided corresponding to the first light emitting elements.

3. A display panel as claimed in claim 1, characterized in that the first photoacoustic conversion material layer comprises a plurality of first photoacoustic conversion parts provided for the respective anodes and a plurality of first optical members provided for the respective first light emitting elements for guiding the light from the first light emitting elements to the first photoacoustic conversion parts adjacent thereto.

4. The display panel of claim 3, wherein the first optical member comprises at least one of a reflective element, a refractive element, and a diffractive element; or the first optical member includes a polarizing beam splitter, a quarter wave plate, and a reflecting plate laminated in this order along a direction from the cathode to the anode, and a polarizing beam splitting film is provided on a diagonal surface of the polarizing beam splitter.

5. A display panel according to claim 3, wherein a plurality of the first optical members are provided corresponding to one of the first light emitting elements, each of the first optical members being for guiding light to the first photoacoustic conversion part in a different direction; the first light receiving surface of the first photoacoustic conversion part is inclined to the surface of the anode.

6. The display panel of any one of claims 1 to 4, wherein the drive backplane comprises a drive layer comprising a plurality of the drive elements and a plurality of drive traces; the driving element is connected with the anode;

7. The display panel according to any one of claims 1 to 4, wherein the pixel defining block includes a bottom insulating block, a conductive block, and a top insulating block, which are sequentially stacked in a direction from the anode to the cathode, the conductive block connecting adjacent two of the cathodes; the conductive block is provided with an avoidance opening, and the first light-emitting element is arranged in the avoidance opening and on the bottom insulating block.

8. The display panel according to any one of claims 1 to 4, further comprising a plurality of second light-emitting elements provided in the pixel defining layer;

The display panel further includes:

9. The manufacturing method of the display panel is characterized by comprising the following steps:

Forming a block of light-emitting material on each of the anodes;

10. A display device comprising the display panel according to any one of claims 1 to 8.