A light emitting substrate, a light source module and a display device

Abstract

The present application discloses a light-emitting substrate, a light source module and a display device, which relate to the field of light source technology and can improve the whistling problem of existing light-emitting substrates. A light-emitting substrate comprises: a substrate plate, at least one side of which is provided with a plurality of lamp beads; a functional material layer, which is provided on at least one side of the substrate plate, and the functional material layer is used to convert the deformation of the substrate plate under the action of an electric field into electric charge.

Description

Technical Field

[0001] The present application relates to the field of light source technology, and in particular to a light-emitting substrate, a light source module and a display device. Background Art

[0002] Usually, the substrate of the light board is a converse piezoelectric material. The converse piezoelectric material has a converse piezoelectric effect. The principle of the converse piezoelectric effect is that when an electric field is applied to the surface of the piezoelectric material, the converse piezoelectric material will stretch or shrink along the direction of the electric field due to the action of the electric field. This process can be understood as the material vibrating due to the excitation of the electric current, resulting in a howling sound. Specifically, the lamp beads on the light board will form an electric field on the light board when the power is on. The lamp beads can be turned on by partition control, and the corresponding vibrations generated by the Ampere force will be formed inside the light board, causing the source of the sound. In normal conditions, the thickness of the light board substrate is a fixed value. When the substrate is under the action of an electric field, it will produce deformations of elongation and contraction in the thickness direction. Deformations of a certain frequency will form vibrations, and vibrations will produce a howling sound. The hearing range of the human ear is 20HZ-20KHZ. Usually, the howling caused by the converse piezoelectric effect will fall into the hearing frequency range of the human ear. Therefore, the existing howling problem of light boards needs to be solved urgently. Summary of the invention

[0003] The embodiments of the present application provide a light-emitting substrate, a light source module and a display device, which can improve the howling problem of the existing light-emitting substrate.

[0004] According to a first aspect of an embodiment of the present application, a light-emitting substrate is provided, comprising:

[0005] A substrate plate, wherein a plurality of lamp beads are arranged on at least one side of the substrate plate;

[0006] The functional material layer is disposed on at least one side of the substrate plate, and the functional material layer is used to convert the deformation of the substrate plate under the action of an electric field into electric charges.

[0007] In some embodiments, the functional material layer includes a positive piezoelectric material.

[0008] In some embodiments, the light-emitting substrate further comprises:

[0009] A driving circuit layer, the driving circuit layer comprising a driving circuit, the driving circuit being electrically connected to the lamp beads;

[0010] The functional material layer is disposed between the substrate plate and the driving circuit layer, or the functional material layer is disposed on a side of the driving circuit layer away from the substrate plate.

[0011] In some embodiments, the light-emitting substrate further comprises:

[0012] A protective layer is arranged on a side of the driving circuit layer away from the substrate plate, the protective layer includes a window area, the lamp beads are arranged in the window area, and the lamp beads are electrically connected to the conductive layer of the driving circuit layer exposed in the window area;

[0013] The functional material layer is arranged between the driving circuit layer and the protective layer, or the functional material layer is arranged on a side of the protective layer away from the driving circuit layer.

[0014] In some embodiments, the light-emitting substrate further comprises:

[0015] The insulating layer is disposed between the driving circuit layer and the functional material layer, and the insulating layer is used to insulate and isolate the driving circuit layer from the functional material layer.

[0016] In some embodiments, the substrate plate is doped with positive piezoelectric material particles; and / or,

[0017] The protective layer is doped with positive piezoelectric material particles;

[0018] The positive piezoelectric material particles are used to convert the deformation of the substrate plate under the action of the electric field into electric charges.

[0019] In some embodiments, the driving circuit layer includes a first driving circuit layer and a second driving circuit layer, and the substrate plate is disposed between the first driving circuit layer and the second driving circuit layer;

[0020] The first driving circuit layer and the second driving circuit layer are electrically connected via through holes on the substrate plate, and the first driving circuit layer or the second driving circuit layer is electrically connected to the lamp beads.

[0021] In some embodiments, the driving circuit layer includes a first driving circuit layer and a second driving circuit layer, and the substrate plate is disposed between the first driving circuit layer and the second driving circuit layer;

[0022] The lamp beads include a first lamp bead and a second lamp bead, the first lamp bead is electrically connected to the first driving circuit layer, and the second lamp bead is electrically connected to the second driving circuit layer.

[0023] In some embodiments, the light-emitting substrate further comprises:

[0024] The functional material layer is grounded via the grounding lead.

[0025] In some embodiments, the functional material layer includes a plurality of functional regions, adjacent functional regions are disconnected, and the plurality of functional regions are arranged in an array.

[0026] In some embodiments, the protective layer includes a white ink material;

[0027] The driving circuit layer includes a copper layer.

[0028] In some embodiments, the lamp beads include MiniLED or MicroLED;

[0029] The plurality of lamp beads are arranged in a strip shape or an array shape.

[0030] In some embodiments, the functional material layer includes an organic piezoelectric material; and / or,

[0031] The positive piezoelectric material particles include organic piezoelectric material and / or inorganic piezoelectric material.

[0032] According to a second aspect of the embodiment of the present application, a light source module is provided, including:

[0033] The light-emitting substrate as described in the first aspect;

[0034] At least one optical film layer is arranged on a side of the lamp bead away from the substrate plate.

[0035] According to a third aspect of the embodiments of the present application, a display device is provided, including:

[0036] A light source module as described in the second aspect.

[0037] The light-emitting substrate provided in the embodiment of the present application is provided with a functional material layer, and the functional material layer can convert the deformation of the substrate plate under the action of the electric field into electric charge. When the lamp bead is powered on and lit, the substrate plate is in an electric field environment, and the substrate plate will be deformed under the action of the electric field. The deformation of the substrate plate will be transmitted to the functional material layer, and the functional material layer can convert the received deformation potential energy into electric charge, that is, the functional material layer can convert the deformation potential energy into electrical energy, and can prevent the deformation vibration of the substrate plate from being converted into sound waves, that is, it can prevent the deformation potential energy from being converted into sound energy, and can also be regarded as cutting off the propagation path of the vibration caused by the deformation of the substrate plate, or it can be understood as absorbing the vibration wave caused by the deformation, which can play a role in weakening or eliminating the sound wave, and can greatly improve the whistling problem of the light-emitting substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic structural diagram of a light-emitting substrate provided in an embodiment of the present application;

[0039] Figure 2 A schematic diagram of the principle of the inverse piezoelectric effect of an inverse piezoelectric material provided in an embodiment of the present application;

[0040] Figure 3 A schematic structural diagram of another light-emitting substrate provided in an embodiment of the present application;

[0041] Figure 4 A schematic structural diagram of another light-emitting substrate provided in an embodiment of the present application;

[0042] Figure 5 A schematic structural diagram of a functional material layer provided in an embodiment of the present application;

[0043] Figure 6 A schematic structural diagram of a light source module provided in an embodiment of the present application;

[0044] Figure 7 A schematic structural diagram of another light source module provided in an embodiment of the present application;

[0045] Figure 8 A schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0047] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0048] Usually, the substrate of the light board is a converse piezoelectric material. The converse piezoelectric material has a converse piezoelectric effect. The principle of the converse piezoelectric effect is that when an electric field is applied to the surface of the piezoelectric material, the converse piezoelectric material will stretch or shrink along the direction of the electric field due to the action of the electric field. This process can be understood as the material vibrating due to the excitation of the electric current, resulting in a howling sound. Specifically, the lamp beads on the light board will form an electric field on the light board when the power is on. The lamp beads can be turned on by partition control, and the corresponding vibrations generated by the Ampere force will be formed inside the light board, causing the source of the sound. In normal conditions, the thickness of the light board substrate is a fixed value. When the substrate is under the action of an electric field, it will produce deformations of elongation and contraction in the thickness direction. Deformations of a certain frequency will form vibrations, and vibrations will produce a howling sound. The hearing range of the human ear is 20HZ-20KHZ. Usually, the howling caused by the converse piezoelectric effect will fall into the hearing frequency range of the human ear. Therefore, the existing howling problem of light boards needs to be solved urgently.

[0049] In view of this, the embodiments of the present application provide a light-emitting substrate, a light source module and a display device, which can improve the howling defect of the existing light-emitting substrate.

[0050] In a first aspect of an embodiment of the present application, a light-emitting substrate is provided. Figure 1 This is a schematic structural diagram of a light-emitting substrate provided in an embodiment of the present application. Figure 1 As shown, it includes: a substrate plate 100, lamp beads 200 and a functional material layer 300. A plurality of lamp beads 200 are arranged on at least one side of the substrate plate 100, and the functional material layer 300 is arranged on at least one side of the substrate plate 100. The functional material layer 300 is used to convert the deformation of the substrate plate 100 under the action of the electric field into electric charge. It should be noted that the electric field that causes the deformation of the substrate plate 100 is formed when the lamp beads 200 are energized. The lamp beads can be arranged on one side of the substrate plate 100, or on both sides of the substrate plate 100, so that both sides of the substrate plate 100 emit light. The functional material layer 300 can be arranged on one side of the substrate plate 100, or on both sides of the substrate plate 100, and the embodiment of the present application is not specifically limited.

[0051] It should be noted that Figure 2 The schematic diagram of the principle of the inverse piezoelectric effect of an inverse piezoelectric material provided in the embodiment of the present application. Figure 2 As shown, the substrate of the light-emitting substrate usually has an inverse piezoelectric effect, that is, it has symmetry in the XY direction but not in the Z direction. The XY direction can be used as the extension plane of the substrate plate, and the Z direction can be used as the thickness direction of the substrate plate. The lamp beads are arranged on the substrate plate. When at least some of the lamp beads are powered on and lit, an electric field will be formed on the substrate plate. Usually, the driving current for lighting the lamp beads is alternating current. Then, the two levels of the electric field applied to the substrate plate are switched with the frequency of the alternating current, and the substrate plate will undergo tensile or compressive deformation in the electric field environment. For example, Figure 2As shown, the thickness of the substrate plate is a fixed value under normal conditions. When the substrate plate is in an electric field environment, it will undergo tensile or compressive deformation in the Z direction, so there is a reverse piezoelectric polarization effect in the Z direction. The electric field directions corresponding to the tensile and compressive deformations are opposite. When the substrate plate frequently switches between the two levels of the electric field, the deformation of the substrate plate will frequently switch between tension and compression, causing the substrate plate to vibrate. The vibration will generate sound waves, and the sound waves will form howling. The hearing range of the human ear is 20HZ-20KHZ. For example, the driving frequency of the lamp bead is 165HZ, the multiplexer is 8 and the routing of 3 channels is 3. The frequency is f=165×8×3=3.96KHZ, which falls within the hearing range of the human ear.

[0052] It should be noted that the conditions for the generation of sound waves are the sound source and the medium. The propagation of vibrations generated by the sound-emitting body in the air or other substances is called sound waves. Sound waves propagate to various places with the help of various media. Sound waves are usually longitudinal waves, and there are also transverse waves. The particles where the sound waves reach vibrate near the equilibrium position along the propagation direction. The propagation of sound waves is essentially the transfer of energy in the medium. Sound waves can be understood as the propagation of small disturbances that deviate from the equilibrium state of the medium. This propagation process is only a process of energy transfer, and no mass transfer occurs. If the disturbance is relatively small, the transmission of sound waves satisfies the classical wave equation and is a linear wave. If the disturbance is large, the linear sound wave equation is not satisfied, and wave dispersion and shock wave generation will occur. In the luminous substrate provided in the embodiment of the present application, the deformation of the substrate plate 100 under the electric field causes vibration, and the vibration can be used as a sound source. The sound source propagates in the luminous substrate material to the air, and the human ear can hear the whistling of the luminous substrate. The functional material layer 300 provided on the light-emitting substrate can convert the vibration of the substrate plate 100 into electric charge, complete the conversion of sound wave energy into electrical energy, or be regarded as the conversion of deformation potential energy into electrical energy, prevent the generation of sound energy, or be regarded as preventing the continued propagation of vibration, so as to achieve the effect of blocking the continued propagation of sound waves, and can be regarded as cutting off the propagation path of sound waves, or as the absorption of vibrations, or the absorption of sound waves, which can achieve the effect of weakening or eliminating sound waves, thereby improving the howling of the light-emitting substrate.

[0053] In view of the above problems, the light-emitting substrate provided in the embodiment of the present application is provided with a functional material layer 300, which can convert the deformation of the substrate plate 100 under the action of the electric field into electric charge. When the lamp bead 200 is powered on and lit, the substrate plate 100 is in an electric field environment, and the substrate plate 100 will be deformed under the action of the electric field. The deformation of the substrate plate 100 will be transmitted to the functional material layer 300, and the functional material layer 300 can convert the received deformation potential energy into electric charge, that is, the functional material layer 300 can convert the deformation potential energy into sound energy, which can also be regarded as blocking the deformation vibration of the substrate plate 100 from being converted into sound waves, that is, the propagation path of the vibration caused by the deformation of the substrate plate 100 can be cut off, or it can be understood as absorbing the vibration wave caused by the deformation, which can play a role in weakening or eliminating the sound wave, and can greatly improve the whistling problem of the light-emitting substrate.

[0054] In some embodiments, the functional material layer 300 may include a positive piezoelectric material. When the positive piezoelectric material is subjected to an external force in a fixed direction, it will deform. The external force comes from the deformation of the substrate plate 100. Charges of opposite signs will be generated on the two force-bearing surfaces of the positive piezoelectric material. When the deformation direction is opposite, the polarity of the charge will also change. When the external force is removed, the positive piezoelectric material returns to a non-charged state. This process can be understood as the positive piezoelectric material receiving the pressure of the vibration of the substrate plate 100 and converting it into an electrical signal. The audible sound waves generated by the vibration of the light-emitting substrate can be converted into ultrasonic waves outside the hearing range of the human ear, that is, electrical energy (electromagnetic waves), thereby eliminating the howling. The positive piezoelectric material can generate an electric charge when it is deformed, that is, it can convert the deformation into an electric charge when it receives the deformation, realizing the conversion of deformation potential energy into electrical energy, and can be complementary to the inverse piezoelectric material of the substrate plate 100. The positive piezoelectric material can improve the vibration howling of the inverse piezoelectric material.

[0055] It should be noted that positive piezoelectric materials refer to crystal materials that will generate voltage between the two end faces when subjected to pressure. The mechanism of the piezoelectric effect is that the symmetry of crystals with positive piezoelectricity is low. When deformed by external force, the relative displacement of positive and negative ions in the unit cell causes the positive and negative charge centers to no longer coincide, resulting in macroscopic polarization of the crystal. The surface charge density of the crystal is equal to the projection of the polarization intensity in the normal direction of the surface, so when the piezoelectric material is deformed by pressure, opposite charges will appear on the two end faces. These characteristics of positive piezoelectric materials can be used to realize the mutual conversion of mechanical vibration and alternating current.

[0056] In some embodiments, the light-emitting substrate further includes a driving circuit layer, the driving circuit layer includes a driving circuit, and the driving circuit is electrically connected to the lamp beads. The driving circuit layer can be a single layer or multiple layers. The multiple driving circuit layers can be respectively arranged on both sides of the substrate plate 100, and can be arranged according to specific driving needs, which is not specifically limited in the embodiments of the present application. The driving circuit layer can include a conductive material, and the conductive material is used to prepare the driving circuit. The conductive material can be a metal material, a metal oxide material, graphene, etc., which is not specifically limited in the embodiments of the present application. The light-emitting substrate also includes a protective layer, which is arranged on the side of the driving circuit layer away from the substrate plate, and the protective layer can be used to protect the driving circuit layer. The protective layer can include white ink, which can reflect light and increase the light output of the light-emitting substrate. The protective layer can include a window area, and the lamp beads are arranged in the window area, and the lamp beads are electrically connected to the conductive layer of the driving circuit layer exposed in the window area. In the case where the driving circuit layer includes a copper layer, the conductive layer exposed in the window area can be leaking copper, which is used to weld the lamp beads. The functional material layer 300 can be arranged between the substrate plate 100 and the driving circuit layer, between the driving circuit layer and the protective layer, or on the side of the protective layer away from the driving circuit layer, which is not specifically limited in this application example.

[0057] For example, Figure 3 This is a schematic structural diagram of another light-emitting substrate provided in an embodiment of the present application. Figure 3 As shown, the driving circuit layer includes a first driving circuit layer 410 and a second driving circuit layer 420, the substrate plate 100 is disposed between the first driving circuit layer 410 and the second driving circuit layer 420, and the functional material layer 300 is provided with two layers, one layer is disposed between the substrate plate 100 and the first driving circuit layer 410, and the other layer is disposed between the substrate plate 100 and the second driving circuit layer 420. The protective layer includes a first protective layer 510 and a second protective layer 520, the first protective layer 510 is disposed on a side of the first driving circuit layer 410 away from the substrate plate 100, and the second protective layer 520 is disposed on a side of the second driving circuit layer 420 away from the substrate plate 100. Figure 3 The light-emitting substrate shown is provided with lamp beads 200 on only one side, the first driving circuit layer 410 and the second driving circuit layer 420 are electrically connected through the through hole 110 on the substrate plate 100, and the first driving circuit layer 410 is electrically connected to the lamp beads 200. The first protective layer 510 includes a window area 501, the lamp beads 200 are provided in the window area 501, and the lamp beads 200 are electrically connected to the conductive layer of the driving circuit layer exposed in the window area 501. The symmetrical arrangement of the first protective layer 510 and the second protective layer 520 can make the overall warping of the light-emitting substrate more balanced.

[0058] Exemplarily, the protective layer can be provided by steel screen printing, and the grid of the steel screen can form the window area 501. The first driving circuit layer 410 can be used to access the positive electrode of the lamp bead 200, and the second driving circuit layer 420 can be connected to the negative electrode of the lamp bead 200. The closer the functional material layer 300 is to the substrate plate 100, the more obvious the improvement effect on the howling is.

[0059] In some embodiments, the lamp bead 200 includes a first lamp bead and a second lamp bead, the first lamp bead is electrically connected to the first driving circuit layer, and the second lamp bead is electrically connected to the second driving circuit layer. Figure 4 This is a schematic structural diagram of another light-emitting substrate provided in an embodiment of the present application. Figure 4 As shown, the lamp bead 200 includes a first lamp bead 210 and a second lamp bead 220. The first lamp bead 210 and the second lamp bead 220 are arranged on different sides of the substrate plate 100. The first lamp bead 210 is electrically connected to the first driving circuit layer 410, and the second lamp bead 220 is electrically connected to the second driving circuit layer 420, so that a double-sided luminous substrate can be obtained. Then the first driving circuit layer 410 and the second driving circuit layer 420 can have an electrically connected circuit or no electrically connected circuit, and can be designed according to a specific circuit, which is not specifically limited in the embodiment of the present application. The first lamp bead 210 and the second lamp bead 220 can be set to emit light of different colors according to specific needs. It is also possible to drive the first lamp bead 210 and the second lamp bead 220 in different zones by setting the driving modes of the first driving circuit layer 410 and the second driving circuit layer 420, which is not specifically limited in the present application.

[0060] For example, Figure 4 In the light-emitting substrate shown, the functional material layer 300 is disposed between the protective layer and the driving circuit layer. It should be noted that, depending on the specific decibel number of the howling, when the light-emitting substrate has a low howling degree, only one functional material layer 300 may be disposed, and this embodiment of the application does not specifically limit this.

[0061] In some embodiments, when the functional material layer is disposed close to the driving circuit layer, an insulating layer may be disposed between the functional material layer 300 and the driving circuit layer, and the insulating layer may insulate the functional material layer 300 from the driving circuit layer. Since the functional material layer 300 may generate electric charge, and a driving circuit is disposed on the driving circuit layer, an insulating layer may be disposed for charge insulation to prevent the electric charge generated by the functional material layer 300 from affecting the driving electrical signal on the driving circuit layer.

[0062] Exemplary, reference Figure 4An insulating layer 600 is provided between the functional material layer 300 and the first driving circuit layer 410, and an insulating layer 600 is also provided between the functional material layer 300 and the second driving circuit layer 420. The insulating layer 600 can isolate the charges generated on the functional material layer 300, so as to prevent the charges generated on the functional material layer 300 from affecting the driving of the driving circuit layer on the lamp beads.

[0063] In some embodiments, the lamp bead may include MiniLED (Mini Light Emitting Diode) or MicroLED (Micro Light Emitting Diode), and multiple LEDs may be arranged in strips or arrays. The size of MiniLED is between 100μm and 300μm, and the size of MicroLED is below 100μm. LEDs arranged in strips can be used to form strip-shaped light-emitting substrates, which can be used to prepare edge-entry backlights; LEDs arranged in arrays can be used to form surface light source light-emitting substrates, which can be used to prepare direct-type backlights or LED display panels, which are not specifically limited in the embodiments of the present application.

[0064] Exemplarily, the area of ​​the LED emitting light is less than 1 mm 2 , which can be called MiniLED; LED can be a structure with a size of hundreds of microns. For example, the area of ​​the light emitting area of ​​the light emitting diode is 10000μm 2 Below, further can be 3000μm 2 Below, further can be 700μm 2 Below, even below 200μm 2 Hereinafter, the embodiments of the present application are not specifically limited.

[0065] For example, when the light-emitting substrate is powered on, the row scanning range of the lamp beads 200 is between 5000 and 15000 lamp beads. The Ampere force generated forms vibrations to produce sound, which is confirmed to be 47.8dB using professional measuring instruments. Under the action of the functional material layer 300, the howling of the light-emitting substrate can be reduced to below 30dB, or even lower.

[0066] In some embodiments, the light-emitting substrate may further include: a ground lead, and the functional material layer 300 may be grounded through the ground lead. It should be noted that the ground end of the driving circuit layer may share the ground lead, and there is no need to add an additional ground lead for the functional material layer 300. The ground lead may guide the charge generated on the functional material layer 300 to the ground end, thereby avoiding the accumulation of charge on the functional material layer 300 and affecting the normal lighting of the light-emitting substrate.

[0067] In some embodiments, positive piezoelectric material particles are doped in the substrate plate 100. The positive piezoelectric material particles are used to convert the deformation of the substrate plate under the action of the electric field into electric charge. The substrate plate 100 includes an inverse piezoelectric material. Doping the positive piezoelectric material particles in the substrate plate 100 can neutralize the piezoelectric effect of the inverse piezoelectric material with the piezoelectric effect of the positive piezoelectric material, thereby improving the vibration caused by the deformation of the substrate plate 100 under the action of the electric field at the source, thereby improving the whistling of the light-emitting substrate.

[0068] In some embodiments, the protective layer is doped with positive piezoelectric material particles. The positive piezoelectric material particles can also be doped in the protective layer, so that the protective layer has the characteristics of the positive piezoelectric material. This is equivalent to increasing the thickness of the positive piezoelectric material without increasing the film thickness of the light-emitting substrate, which can better improve the howling of the light-emitting substrate.

[0069] Exemplarily, positive piezoelectric material particles may be doped in the second protective layer 520. The second protective layer 520 is a symmetrical structure with the first protective layer 510 in order to improve the warping of the light-emitting substrate. The doped positive piezoelectric particles may be directly mixed in white oil for direct coating.

[0070] Exemplarily, the functional material layer 300 can be prepared by coating, or can be made into a positive piezoelectric material film pressed onto the light-emitting substrate.

[0071] In some embodiments, the functional material layer includes an organic piezoelectric material; and the positive piezoelectric material particles include one or both of an organic piezoelectric material and an inorganic piezoelectric material.

[0072] Exemplarily, inorganic piezoelectric materials are divided into piezoelectric crystals and piezoelectric ceramics. Piezoelectric crystals generally refer to piezoelectric single crystals; piezoelectric ceramics generally refer to piezoelectric polycrystals. Piezoelectric ceramics refer to polycrystals formed by mixing, molding, and high-temperature sintering of raw materials with necessary components, and obtained by solid-phase reaction between powder particles and sintering process. Such as: barium titanate BT, lead zirconate titanate PZT, modified lead zirconate titanate, lead metaniobate, lead barium lithium niobate PBLN, modified lead titanate PT, etc. Piezoelectric crystals generally refer to piezoelectric single crystals, which refer to crystals that grow in a long-range orderly manner according to the crystal space lattice. This crystal structure has no symmetry center and therefore has piezoelectricity. Such as crystal (quartz crystal), lithium gallate, lithium germanate, titanium germanate, and iron transistor lithium niobate, lithium tantalate, etc. Organic piezoelectric materials are also called piezoelectric polymers, such as PVDF (polyvinylidene fluoride) film and other organic piezoelectric film materials represented by it. This type of material is composed of piezoelectric materials in the form of sheets, rods, bars, or powder embedded in an organic polymer base material. Therefore, an organic piezoelectric material film can be pressed onto a light-emitting substrate by a substrate factory, or positive piezoelectric particles can be doped into a film layer on the light-emitting substrate.

[0073] In some embodiments, the functional material layer 300 includes at least two functional regions, and adjacent functional regions are disconnected. Arranging the functional material layer to have at least two disconnected functional regions can prevent the generated charges from forming a large amount of accumulation on the functional material layer, thereby preventing the large amount of accumulated charges from forming an instantaneous high voltage to damage the light-emitting substrate.

[0074] In some embodiments, the functional material layer 300 includes a plurality of functional regions arranged in an array. The functional regions arranged in an array can make the generated charge distribution more uniform.

[0075] For example, Figure 5 This is a schematic structural diagram of a functional material layer provided in an embodiment of the present application. Figure 5 As shown, the functional material layer 300 includes a plurality of functional regions 301 , which are arranged in an array and adjacent functional regions 301 are disconnected, thereby avoiding excessive charge accumulation.

[0076] According to a second aspect of the embodiments of the present application, a light source module is provided. Figure 6 This is a schematic structural diagram of a light source module provided in an embodiment of the present application. Figure 6 As shown, the light source module provided in the embodiment of the present application includes: the light emitting substrate 1000 as described in the first aspect.

[0077] It should be noted that the light source module provided in the embodiment of the present application can be used as a backlight source for a display device, and can also be directly used to prepare an LED display panel, which is not specifically limited in the embodiment of the present application.

[0078] In the light source module provided in the embodiment of the present application, the light-emitting substrate is provided with a functional material layer, and the functional material layer can convert the deformation of the substrate plate under the action of the electric field into electric charge. When the lamp bead is powered on and lit, the substrate plate is in an electric field environment, and the substrate plate will be deformed under the action of the electric field. The deformation of the substrate plate will be transmitted to the functional material layer, and the functional material layer can convert the received deformation potential energy into electric charge, that is, the functional material layer can convert the deformation potential energy into sound energy, and can also be regarded as blocking the deformation vibration of the substrate plate from being converted into sound waves, that is, the propagation path of the vibration caused by the deformation of the substrate plate can be cut off, or it can be understood as absorbing the vibration wave caused by the deformation, which can play a role in weakening or eliminating the sound wave, and can greatly improve the whistling problem of the light-emitting substrate.

[0079] In some embodiments, Figure 7 A schematic structural diagram of another light source module provided in an embodiment of the present application. In the case where the light-emitting substrate is used to prepare a backlight source, such as Figure 7As shown, the light source module provided in the embodiment of the present application further includes: at least one optical film layer, which is arranged on the side of the light-emitting substrate 1000 having the lamp bead 200, that is, arranged on the side of the lamp bead 200 away from the substrate plate 100. Exemplarily, the optical film layer may include a quantum dot film 710, a uniform light film 720, a lower diffuser 730, a prism sheet 740 and an upper diffuser 750. Exemplarily, the lamp bead 200 can emit blue light, the quantum dot film 710 may include a yellow fluorescent material, and the blue light is converted by the excitation of the quantum dot film 710 to obtain white light emission. The uniform light film 720 may include multiple layers for uniform light.

[0080] According to a third aspect of the embodiments of the present application, a display device is provided. Figure 8 Schematic diagram of a display device provided in an embodiment of the present application. Figure 8 As shown, it includes: the light source module 2000 as described in the second aspect.

[0081] In some embodiments, the display device may include multiple light-emitting substrates, which are spliced ​​into a larger light source module to achieve a large-sized display screen. For example, multiple spliced ​​light-emitting substrates can be applied to large-scale stage or conference background screens. For example, multiple spliced ​​light-emitting substrates can also be applied to scenes of special-shaped displays, etc., which are not specifically limited in the embodiments of the present application.

[0082] It should be noted that the display device provided in the embodiment of the present application may be a liquid crystal display device or an LED display device. In a liquid crystal display device, the light source module 2000 may be used as a backlight source. In an LED display device, the light source module 2000 may be used directly for display.

[0083] It should be noted that the display device provided in the embodiments of the present application may be a smart phone, a laptop computer, a tablet computer, a television, or other display.

[0084] In the display device provided by the embodiment of the present application, the light-emitting substrate is provided with a functional material layer, and the functional material layer can convert the deformation of the substrate plate under the action of the electric field into electric charge. When the lamp bead is powered on and lit, the substrate plate is in an electric field environment, and the substrate plate will be deformed under the action of the electric field. The deformation of the substrate plate will be transmitted to the functional material layer, and the functional material layer can convert the received deformation potential energy into electric charge, that is, the functional material layer can convert the deformation potential energy into sound energy, which can also be regarded as blocking the deformation vibration of the substrate plate from being converted into sound waves, that is, the propagation path of the vibration caused by the deformation of the substrate plate can be cut off, or it can be understood as absorbing the vibration wave caused by the deformation, which can play a role in weakening or eliminating the sound wave, and can greatly improve the howling problem of the light-emitting substrate.

[0085] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0087] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0088] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A light-emitting substrate, characterized in that: include: A substrate plate, wherein a plurality of lamp beads are arranged on at least one side of the substrate plate; A functional material layer, disposed on at least one side of the substrate plate, the functional material layer being used to convert the deformation of the substrate plate under the action of an electric field into electric charges; The functional material layer includes a positive piezoelectric material; The substrate plate comprises an inverse piezoelectric material, and particles of a positive piezoelectric material are doped in the substrate plate; The functional material layer includes a plurality of functional regions, adjacent functional regions are disconnected, and the plurality of functional regions are arranged in an array.

2. The light-emitting substrate according to claim 1, characterized in that: Also includes: A driving circuit layer, the driving circuit layer comprising a driving circuit, the driving circuit being electrically connected to the lamp beads; The functional material layer is disposed between the substrate plate and the driving circuit layer, or the functional material layer is disposed on a side of the driving circuit layer away from the substrate plate.

3. The light-emitting substrate according to claim 2, characterized in that: Also includes: A protective layer is arranged on a side of the driving circuit layer away from the substrate plate, the protective layer includes a window area, the lamp beads are arranged in the window area, and the lamp beads are electrically connected to the conductive layer of the driving circuit layer exposed in the window area; The functional material layer is arranged between the driving circuit layer and the protective layer, or the functional material layer is arranged on a side of the protective layer away from the driving circuit layer.

4. The light-emitting substrate according to claim 3, characterized in that: Also includes: The insulating layer is disposed between the driving circuit layer and the functional material layer, and the insulating layer is used to insulate and isolate the driving circuit layer from the functional material layer.

5. The light-emitting substrate according to claim 3, characterized in that: The protective layer is doped with positive piezoelectric material particles; The positive piezoelectric material particles are used to convert the deformation of the substrate plate under the action of the electric field into electric charges.

6. The light emitting substrate according to claim 3, characterized in that: The driving circuit layer includes a first driving circuit layer and a second driving circuit layer, and the substrate plate is arranged between the first driving circuit layer and the second driving circuit layer; The first driving circuit layer and the second driving circuit layer are electrically connected via through holes on the substrate plate, and the first driving circuit layer or the second driving circuit layer is electrically connected to the lamp beads.

7. The light-emitting substrate according to claim 3, characterized in that: The driving circuit layer includes a first driving circuit layer and a second driving circuit layer, and the substrate plate is arranged between the first driving circuit layer and the second driving circuit layer; The lamp beads include a first lamp bead and a second lamp bead, the first lamp bead is electrically connected to the first driving circuit layer, and the second lamp bead is electrically connected to the second driving circuit layer.

8. The light emitting substrate according to claim 1, characterized in that: Also includes: The functional material layer is grounded via the grounding lead.

9. The light-emitting substrate according to claim 3, characterized in that: The protective layer includes a white ink material; The driving circuit layer includes a copper layer.

10. The light emitting substrate according to claim 1, characterized in that: The lamp beads include MiniLED or MicroLED; The plurality of lamp beads are arranged in a strip shape or an array shape.

11. The light emitting substrate according to claim 5, characterized in that: The functional material layer includes an organic piezoelectric material; and / or, The positive piezoelectric material particles include organic piezoelectric material and / or inorganic piezoelectric material.

12. A light source module, characterized in that: include: The light-emitting substrate according to any one of claims 1 to 11; At least one optical film layer is arranged on a side of the lamp bead away from the substrate plate.

13. A display device, characterized in that: include: The light source module as claimed in claim 12.

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