Light-transmitting film, display panel and display device

Abstract

The present application relates to a light-transmitting film, a display panel and a display device. The light-transmitting film is applied to a display module, the display module includes at least one functional layer, the at least one functional layer includes a first functional layer, the first functional layer and the light-transmitting film are bonded together; the light-transmitting film includes a light-transmitting film body; the absolute value of the difference between the acoustic impedance of the light-transmitting film body and the acoustic impedance of the first functional layer is a first value; a plurality of acoustic impedance adjusting particles are arranged in the light-transmitting film body; the acoustic impedance of the acoustic impedance adjusting particles is different from the acoustic impedance of the light-transmitting film body; wherein the absolute value of the difference between the acoustic impedance of the light-transmitting film and the acoustic impedance of the first functional layer is a second value, and the second value is less than the first value. Therefore, the light-transmitting film, the display panel and the display device provided by the present application can reduce the reflection of sound waves at the interface between the light-transmitting film and the first functional layer, improve the sound wave transmittance, and improve the sound emission efficiency of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a light-transmitting film, a display panel and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display technology is regarded as the most promising new flat panel display technology of the next generation. Compared with liquid crystal display technology, OLED display technology has the advantages of low energy consumption, low cost, self-luminescence, wide viewing angle and fast response speed.

[0003] In the related art, the integration of OLED display technology and under-screen sound technology can eliminate the area occupied by the traditional receiver (i.e., the handset of a mobile phone) on the top of the display panel, reduce the size of the top frame of the display panel, and help improve the screen-to-body ratio of the display panel. However, the sound efficiency of the above display panel needs to be improved. Summary of the invention

[0004] Based on this, it is necessary to provide a light-transmitting film, a display panel and a display device, which can reduce the reflection of sound waves on the interface between the light-transmitting film and the first functional layer, increase the sound wave transmittance, and improve the sound emission efficiency of the display panel.

[0005] In a first aspect, an embodiment of the present application provides a light-transmitting film, which is applied to a display module. The display module includes at least one functional layer, and the at least one functional layer includes a first functional layer. The first functional layer and the light-transmitting film are laminated together. The light-transmitting film includes:

[0006] a light-transmitting film body; the absolute value of the difference between the acoustic impedance of the light-transmitting film body and the acoustic impedance of the first functional layer is a first value;

[0007] A plurality of acoustic impedance adjustment particles are disposed in the light-transmitting film body; the acoustic impedance of the acoustic impedance adjustment particles is different from the acoustic impedance of the light-transmitting film body;

[0008] The absolute value of the difference between the acoustic impedance of the light-transmitting film and the acoustic impedance of the first functional layer is a second value, and the second value is smaller than the first value.

[0009] The light-transmitting film proposed in the embodiment of the present application can adjust the acoustic impedance of the light-transmitting film by adding acoustic impedance adjusting particles in the light-transmitting film body, so that the acoustic impedance of the light-transmitting film is closer to the first functional layer, so that the acoustic impedance of the light-transmitting film can achieve acoustic impedance matching with the acoustic impedance of the first functional layer due to the smaller difference, thereby reducing the reflection of sound waves at the interface between the light-transmitting film and the first functional layer, improving the transmittance of sound waves, and improving the propagation efficiency of sound waves by the light-transmitting film and the first functional layer. When the light-transmitting film is applied to a display panel, the sound efficiency and intensity of the display panel can be improved, and the power consumption of sound generation under the screen can be reduced.

[0010] In one embodiment, the acoustic impedance of the acoustic impedance adjusting particles is greater than the acoustic impedance of the light-transmitting film body;

[0011] Preferably, the acoustic impedance of the first functional layer is greater than the acoustic impedance of the light-transmitting film body;

[0012] Alternatively, the acoustic impedance of the acoustic impedance adjusting particles is smaller than the acoustic impedance of the light-transmitting film body;

[0013] Preferably, the acoustic impedance of the first functional layer is smaller than the acoustic impedance of the light-transmitting film body.

[0014] In one embodiment, there are multiple functional layers, and the multiple functional layers include a second functional layer, and the second functional layer is attached to a side of the light-transmitting film away from the first functional layer;

[0015] The absolute value of the difference between the acoustic impedance of the light-transmitting film body and the acoustic impedance of the second functional layer is a third value, the absolute value of the difference between the acoustic impedance of the light-transmitting film and the acoustic impedance of the second functional layer is a fourth value, the third value is less than the fourth value, or the third value is greater than the fourth value;

[0016] Preferably, the acoustic impedance of the light-transmitting film body is smaller than the acoustic impedance of the first functional layer and the second functional layer;

[0017] Preferably, the acoustic impedance of the first functional layer is greater than the acoustic impedance of the second functional layer, the third value is less than the first value, the absolute value of the difference between the first value and the second value is a fifth value, the absolute value of the difference between the third value and the fourth value is a sixth value, and the fifth value is greater than the sixth value;

[0018] Preferably, the fourth value is less than or equal to 8 MRayls;

[0019] Preferably, the fourth value is less than or equal to 6 MRayls.

[0020] In one embodiment, a plurality of acoustic impedance adjusting particles are evenly distributed in the light-transmitting film body.

[0021] In one embodiment, the display module includes a plurality of light-emitting areas and a non-light-emitting area located outside the light-emitting areas;

[0022] The distribution density of the acoustic impedance adjustment particles located in the light-emitting region is less than the distribution density of the acoustic impedance adjustment particles located in the non-light-emitting region;

[0023] Preferably, the non-luminescent region includes a first sub-region and a second sub-region, the first sub-region is located between the second sub-region and the luminescent region, and the distribution density of the acoustic impedance regulating particles located in the first sub-region gradually increases from the luminescent region to the non-luminescent region.

[0024] In one embodiment, the distribution density of the acoustic impedance adjusting particles gradually increases along the direction from the light-transmitting film to the first functional layer.

[0025] In one embodiment, the material of the acoustic impedance adjusting particles includes an inorganic material;

[0026] Preferably, the material of the acoustic impedance adjusting particles includes at least one of tungsten oxide, zirconium oxide, aluminum oxide, titanium oxide and silicon oxide;

[0027] Preferably, the acoustic impedance adjusting particles include acoustic impedance enhancing nanoparticles;

[0028] Preferably, the material of the light-transmitting film body includes organic material;

[0029] Preferably, the material of the light-transmitting film body includes optical glue;

[0030] Preferably, the particle size range of the acoustic impedance adjusting particles is 3nm-100nm;

[0031] Preferably, the particle size of the acoustic impedance adjusting particles ranges from 5 nm to 50 nm;

[0032] Preferably, the ratio of the sum of the weights of all acoustic impedance adjusting particles to the weight of the light-transmitting film is in the range of 10% to 80%;

[0033] Preferably, the ratio of the sum of the weights of all acoustic impedance adjusting particles to the weight of the light-transmitting film is in the range of 30% to 70%;

[0034] Preferably, the acoustic impedance of the light-transmitting film is greater than or equal to 1 MRayls;

[0035] Preferably, the acoustic impedance of the light-transmitting film ranges from 3 MRayls to 9 MRayls;

[0036] Preferably, the acoustic impedance of the acoustic impedance adjusting particle material ranges from 10 MRayls to 50 MRayls;

[0037] Preferably, the acoustic impedance of the acoustic impedance adjusting particle material ranges from 20 MRayls to 45 MRayls;

[0038] Preferably, the acoustic impedance of the light-transmitting film body is less than or equal to 1 MRayls;

[0039] Preferably, the refractive index of the light-transmitting film is less than or equal to 1.8;

[0040] Preferably, the refractive index of the light-transmitting film is less than or equal to 1.6;

[0041] Preferably, the light transmittance of the light-transmitting film is greater than or equal to 90%;

[0042] Preferably, the light transmittance of the light-transmitting film is greater than or equal to 95%;

[0043] Preferably, the first value is greater than or equal to 10 MRayls;

[0044] Preferably, the first value is greater than or equal to 12 MRayls;

[0045] Preferably, the second value is less than or equal to 8 MRayls;

[0046] Preferably, the second value is less than or equal to 6 MRayls.

[0047] In a second aspect, an embodiment of the present application provides a display panel, comprising: a display module and the light-transmitting film in the first aspect above, the display module comprising at least one functional layer, the at least one functional layer comprising a first functional layer, the first functional layer and the light-transmitting film are bonded together.

[0048] The display panel proposed in the embodiment of the present application includes a light-transmitting film. By adding acoustic impedance adjusting particles in the light-transmitting film body, the acoustic impedance of the light-transmitting film can be adjusted so that the acoustic impedance of the light-transmitting film is closer to the first functional layer, so that the acoustic impedance of the light-transmitting film can achieve acoustic impedance matching with the acoustic impedance of the first functional layer due to the smaller difference, thereby reducing the reflection of sound waves at the interface between the light-transmitting film and the first functional layer, improving the sound wave transmittance, and improving the propagation efficiency of the light-transmitting film and the first functional layer for sound waves. When the light-transmitting film is applied to the display panel, the sound efficiency and intensity of the display panel can be improved, and the power consumption of the sound under the screen can be reduced.

[0049] In one embodiment, there are multiple functional layers, and the multiple functional layers are stacked, and a light-transmitting film is disposed between at least some of the adjacent two functional layers;

[0050] Preferably, the multiple functional layers include a substrate, a light-emitting device layer and a cover plate, the light-emitting device layer is arranged between the substrate and the cover plate, and the light-transmitting film is located between the light-emitting device layer and the cover plate;

[0051] Preferably, the multiple functional layers include an optical layer, the optical layer is located between the light-emitting device layer and the cover plate, and there is at least one light-transmitting film, the at least one light-transmitting film includes a first light-transmitting film, and the first light-transmitting film is located between the optical layer and the cover plate;

[0052] Preferably, the multiple functional layers include a touch layer, and the touch layer is arranged between the optical layer and the light-emitting device layer; the number of light-transmitting films is multiple, and the multiple light-transmitting films are stacked along the thickness direction of the substrate, and the multiple light-transmitting films include a first light-transmitting film and a second light-transmitting film, the first light-transmitting film is located between the optical layer and the cover plate, and the second light-transmitting film is located between the optical layer and the touch layer;

[0053] Preferably, the plurality of functional layers include a first encapsulation layer, the first encapsulation layer is located between the light-emitting device layer and the touch layer, and the plurality of light-transmitting films include a third light-transmitting film, the third light-transmitting film is located between the first encapsulation layer and the touch layer;

[0054] Preferably, the multiple functional layers include a second encapsulation layer and a third encapsulation layer, the second encapsulation layer and the third encapsulation layer are both located between the first encapsulation layer and the light-emitting device layer, and the second encapsulation layer is located between the first encapsulation layer and the third encapsulation layer; the multiple light-transmitting films include a fourth light-transmitting film, and the fourth light-transmitting film is reused as the second encapsulation layer;

[0055] Preferably, the display panel includes a plurality of light-emitting areas and a non-light-emitting area located outside the light-emitting areas;

[0056] Preferably, the optical layer includes a plurality of filters, the plurality of filters are arranged correspondingly to the plurality of light-emitting areas, and the filters overlap with the corresponding light-emitting areas; or the optical layer includes a polarizer, and the polarizer is located in the light-emitting area and the non-light-emitting area;

[0057] Preferably, the material of the second encapsulation layer includes an organic material;

[0058] Preferably, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials.

[0059] In a third aspect, an embodiment of the present application provides a display device, comprising the display panel in the above-mentioned second aspect.

[0060] The display device provided in the embodiment of the present application includes a light-transmitting film. By adding acoustic impedance adjusting particles in the light-transmitting film body, the acoustic impedance of the light-transmitting film can be adjusted so that the acoustic impedance of the light-transmitting film is closer to the first functional layer, so that the acoustic impedance of the light-transmitting film can achieve acoustic impedance matching with the acoustic impedance of the first functional layer due to a smaller difference, thereby reducing reflection of sound waves at the interface between the light-transmitting film and the first functional layer, improving the transmittance of sound waves, and improving the propagation efficiency of sound waves by the light-transmitting film and the first functional layer. When the light-transmitting film is applied to a display panel, the sound efficiency and intensity of the display panel can be improved, and the power consumption of sound generation under the screen can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0062] Figure 1 A cross-sectional view of a display panel provided in an embodiment of the present application.

[0063] Figure 2 Another cross-sectional view of the display panel provided in an embodiment of the present application.

[0064] Figure 3 Another cross-sectional view of the display panel provided in an embodiment of the present application.

[0065] Figure 4 Another cross-sectional view of the display panel provided in an embodiment of the present application.

[0066] Figure 5 A top view of a display panel provided in an embodiment of the present application.

[0067] Figure 6 A cross-sectional view of a light-transmitting film provided in an embodiment of the present application.

[0068] Figure 7 Another cross-sectional view of the light-transmitting film provided in an embodiment of the present application.

[0069] Description of reference numerals:

[0070] 100, display panel; 100a, display area; 101a, light-emitting area; 102a, non-light-emitting area; 1021a, first sub-area; 1022a, second sub-area; 100b, non-display area; 103, display module; 104, display screen; 110, substrate; 120, light-emitting device layer; 121, light-emitting unit; 130, cover plate; 140, optical layer; 141, filter layer; 142, polarizer; 150, touch layer; 161, first encapsulation layer; 162, second encapsulation layer; 163, third encapsulation layer; 170, light-transmitting film; 170a, first light-transmitting film; 170b, second light-transmitting film; 170c, third light-transmitting film; 170d, fourth light-transmitting film; 171, light-transmitting film body; 172, acoustic impedance adjusting particles; 180, pixel defining layer; 181, pixel opening. DETAILED DESCRIPTION

[0071] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0072] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, they do not represent any order, quantity or importance, but are only used to distinguish different components. These terms are only used to distinguish one element from another. For example, without departing from the scope of the present application, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0074] Organic Light Emitting Diode (OLED) display technology is regarded as the most promising new flat panel display technology of the next generation. Compared with liquid crystal display technology, OLED display technology has the advantages of low energy consumption, low cost, self-luminescence, wide viewing angle and fast response speed.

[0075] In the process of implementing this application, the inventor discovered the following problems in the related technology: the under-screen sound-emitting display panel may include a display module and a sound-emitting device, the sound-emitting device may be arranged on the backlight side of the display module, and the sound-emitting device is used to drive the display module to vibrate to form sound.

[0076] However, since the functional layers in the display module may include organic functional layers with high viscosity and elasticity, such as an organic encapsulation layer and a transparent optical adhesive layer, the acoustic impedance of the organic functional layer is small, and the difference in acoustic impedance between the organic functional layer and other adjacent functional layers is large, which causes the sound waves to be strongly reflected at the interface between the organic functional layer and the other adjacent functional layers, resulting in low sound wave transmittance, thereby resulting in low sound efficiency and intensity of the display panel and high power consumption of sound under the screen.

[0077] In view of at least one of the above problems, the embodiments of the present application provide a light-transmitting film, a display panel and a display device, which can reduce the reflection of sound waves at the interface between the light-transmitting film and the first functional layer, improve the sound wave transmittance, and improve the propagation efficiency of the light-transmitting film and the functional layer for sound waves, thereby improving the sound emission efficiency of the display panel.

[0078] The following will be combined Figure 1-Figure 7 The light-transmitting film, display panel and display device provided in the embodiments of the present application are described.

[0079] See also Figure 1The embodiment of the present application provides a light-transmitting film 170, which is applied to a display module. The display module 103 includes at least one functional layer, and the at least one functional layer includes a first functional layer. The first functional layer and the light-transmitting film 170 are bonded. The light-transmitting film 170 includes a light-transmitting film body 171 and a plurality of acoustic impedance adjusting particles 172. The plurality of acoustic impedance adjusting particles 172 can be disposed in the light-transmitting film body 171, and the light-transmitting film body 171 can serve as a bearing structure for the acoustic impedance adjusting particles 172. The acoustic impedance of the acoustic impedance adjusting particles 172 is different from the acoustic impedance of the light-transmitting film body 171, wherein the absolute value of the difference between the acoustic impedance of the light-transmitting film body 171 and the acoustic impedance of the first functional layer is a first value, and the absolute value of the difference between the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the first functional layer is a second value, and the second difference is smaller than the first difference. Thus, by adding the acoustic impedance adjusting particles 172 to the transparent film body 171, the acoustic impedance of the transparent film 170 can be adjusted so that the acoustic impedance of the transparent film 170 is closer to that of the first functional layer, so that the acoustic impedance of the transparent film 170 can be smaller than that of the first functional layer to achieve acoustic impedance matching, thereby reducing the reflection of sound waves on the interface between the transparent film 170 and the first functional layer, improving the sound wave transmittance, and improving the propagation efficiency of the transparent film 170 and the first functional layer to the sound waves. When the transparent film 170 is applied to the display panel 100, the sound emission efficiency and intensity of the display panel 100 can be improved, and the power consumption of the sound emission under the screen can be reduced. Among them, the first functional layer is arranged adjacent to the transparent film 170.

[0080] It should be noted that acoustic impedance can be an indicator of a material's ability to block the propagation of sound waves, which is determined by the properties of the material itself. When sound waves propagate between two adjacent film layers, reflection and transmission of the sound waves will occur at the interface between the two adjacent film layers, and the ratio of sound wave reflection and transmission is determined by the acoustic impedance of the two adjacent film layers. When the difference in acoustic impedance between two adjacent film layers is large, the sound wave reflection is strong and the transmission is weak, which will cause a large energy loss of the sound wave during propagation. When the difference in acoustic impedance between two adjacent film layers is small, the sound wave reflection is weak and the transmission is strong.

[0081] In some embodiments, the acoustic impedance of the first functional layer may be greater than the acoustic impedance of the light-transmitting film body 171 , or the acoustic impedance of the first functional layer may be less than the acoustic impedance of the light-transmitting film body 171 .

[0082] In some embodiments, the acoustic impedance of the first functional layer may be greater than the acoustic impedance of the light-transmitting film 170 , or the acoustic impedance of the first functional layer may be less than the acoustic impedance of the light-transmitting film 170 , or the acoustic impedance of the first functional layer may be equal to the acoustic impedance of the light-transmitting film 170 .

[0083] Exemplarily, the first value is greater than or equal to 10 MRayls. For example, the first value is greater than or equal to 12 MRayls.

[0084] It should be noted that the first value may also be other values ​​less than 10 MRayls.

[0085] Exemplarily, the second value is less than or equal to 8 MRayls, so that the difference between the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the first functional layer is small, and the acoustic impedance matching is high, thereby reducing sound wave reflection and improving the transmittance of sound waves.

[0086] Exemplarily, the second value is less than or equal to 6 MRayls, which further makes the difference between the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the first functional layer smaller and the acoustic impedance matching higher, thereby reducing sound wave reflection and improving the transmittance of sound waves.

[0087] For example, the second value may be 0 MRayls, 0.5 MRayls, 1 MRayls, 3 MRayls, 5 MRayls, 6 MRayls, 8 MRayls, or any value less than 8 MRayls.

[0088] In some embodiments, the acoustic impedance of the first functional layer is greater than the acoustic impedance of the transparent film body 171, and the acoustic impedance of the acoustic impedance adjusting particles 172 is greater than the acoustic impedance of the transparent film body 171. Thus, by adding the acoustic impedance adjusting particles 172 to the transparent film body 171, the acoustic impedance of the transparent film 170 can be increased, so that the acoustic impedance of the transparent film 170 is closer to the first functional layer, thereby reducing the reflection of sound waves at the interface between the transparent film 170 and the first functional layer, improving the sound wave transmittance, and improving the propagation efficiency of sound waves between the transparent film 170 and the adjacent first functional layer.

[0089] In other embodiments, the acoustic impedance of the first functional layer is smaller than the acoustic impedance of the light-transmitting film body 171, and the acoustic impedance of the acoustic impedance adjusting particles 172 is smaller than the acoustic impedance of the light-transmitting film body 171. Thus, by adding the acoustic impedance adjusting particles 172 into the light-transmitting film body 171, the acoustic impedance of the light-transmitting film 170 can be reduced, so that the acoustic impedance of the light-transmitting film 170 is closer to that of the first functional layer, thereby reducing the reflection of sound waves at the interface between the light-transmitting film 170 and the first functional layer, improving the sound wave transmittance, and improving the propagation efficiency of sound waves between the light-transmitting film 170 and the adjacent first functional layer.

[0090] In some embodiments, the display module 103 has multiple functional layers, and the multiple functional layers include a second functional layer, and the second functional layer is attached to the side of the light-transmitting film 170 away from the first functional layer. That is, the light-transmitting film 170 is located between the first functional layer and the second functional layer. The absolute value of the difference between the acoustic impedance of the light-transmitting film body 171 and the acoustic impedance of the second functional layer is a third value, and the absolute value of the difference between the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the second functional layer is a fourth value, and the third value is less than the fourth value, or the third value is greater than the fourth value.

[0091] In some embodiments, the acoustic impedance of the second functional layer may be greater than the acoustic impedance of the transparent film body 171 , or the acoustic impedance of the second functional layer may be less than the acoustic impedance of the transparent film body 171 , or the acoustic impedance of the second functional layer may be equal to the acoustic impedance of the transparent film body 171 .

[0092] In some embodiments, the acoustic impedance of the second functional layer may be greater than the acoustic impedance of the light-transmitting film 170 , or the acoustic impedance of the second functional layer may be less than the acoustic impedance of the light-transmitting film 170 , or the acoustic impedance of the second functional layer may be equal to the acoustic impedance of the light-transmitting film 170 .

[0093] In some embodiments, the acoustic impedance of the transparent film body 171 is less than the acoustic impedance of the first functional layer and the second functional layer. Alternatively, the acoustic impedance of the transparent film body 171 is greater than the acoustic impedance of the first functional layer and the second functional layer. Alternatively, the acoustic impedance of the transparent film body 171 is between the acoustic impedances of the first functional layer and the second functional layer.

[0094] In an embodiment where the acoustic impedance of the light-transmitting film body 171 is smaller than the acoustic impedance of the first functional layer and the second functional layer, the acoustic impedance of the first functional layer may be greater than the acoustic impedance of the second functional layer, and the third value may be smaller than the first value, that is, the difference in acoustic impedance between the light-transmitting film body 171 and the first functional layer is greater than the difference in acoustic impedance between the light-transmitting film body 171 and the second functional layer, the absolute value of the difference between the first value and the second value is the fifth value, and the absolute value of the difference between the third value and the fourth value is the sixth value, and the fifth value is greater than the sixth value, which is beneficial for making the difference in acoustic impedance between the light-transmitting film 170 and the acoustic impedance of the first functional layer and the second functional layer respectively smaller, and is beneficial for the acoustic impedance of the light-transmitting film 170 to match the acoustic impedance of the first functional layer and the second functional layer at the same time.

[0095] Exemplarily, the fourth value is less than or equal to 8 MRayls, so that the difference between the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the second functional layer is small, and the acoustic impedance matching is high, thereby reducing sound wave reflection and improving the transmittance of sound waves.

[0096] Exemplarily, the fourth value is less than or equal to 6 MRayls, which further makes the difference between the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the second functional layer smaller and the acoustic impedance matching higher, thereby reducing sound wave reflection and improving the transmittance of sound waves.

[0097] For example, the fourth value may be 0 MRayls, 0.5 MRayls, 1 MRayls, 3 MRayls, 5 MRayls, 6 MRayls, 8 MRayls, or any value less than 8 MRayls.

[0098] In some embodiments, the light-transmitting film body 171 may be in a liquid state before being cured, and the acoustic impedance adjusting particles 172 may be added to the liquid light-transmitting film body material, and the acoustic impedance adjusting particles 172 may be mixed in the liquid light-transmitting film body material, and then the light-transmitting film body material mixed with the acoustic impedance adjusting particles 172 may be coated and cured to form the light-transmitting film 170. The acoustic impedance of the light-transmitting film 170 may be adjusted by adjusting the amount of the acoustic impedance adjusting particles 172 added.

[0099] In some embodiments, a plurality of acoustic impedance adjusting particles 172 may be evenly distributed in the transparent film 171 , and the distribution density of the acoustic impedance adjusting particles 172 in different regions of the transparent film 171 may be the same, which helps to reduce the difficulty of preparing the transparent film 170 .

[0100] The distribution density of the acoustic impedance adjusting particles 172 may refer to the sum of the weights of all the acoustic impedance adjusting particles 172 in the light-transmitting film 170 within a unit volume. Alternatively, the distribution density may refer to the total number of all the acoustic impedance adjusting particles 172 in the light-transmitting film 170 within a unit volume.

[0101] In some other embodiments, the distribution density of the light-transmitting film 170 in different regions may be different. The embodiment of the present application does not limit the distribution density of the acoustic impedance adjusting particles 172 in the light-transmitting film 171 .

[0102] In some embodiments, the distribution density of the acoustic impedance adjusting particles 172 gradually increases along the direction from the light-transmitting film 170 to the first functional layer. For example, the acoustic impedance of the first functional layer is greater than the acoustic impedance of the light-transmitting film body 171. By adding the acoustic impedance adjusting particles 172 that can enhance the acoustic impedance into the light-transmitting film body 171, in a partial area of ​​the light-transmitting film 170 close to the first functional layer, the distribution density of the acoustic impedance adjusting particles 172 in this partial area is relatively large, the acoustic impedance of the light-transmitting film 170 in this partial area is relatively large, and the difference in acoustic impedance between the light-transmitting film 170 and the first functional layer in this partial area is relatively small, thereby reducing the reflection of the sound wave at the interface between the light-transmitting film 170 and the first functional layer, improving the sound wave transmittance, and improving the propagation efficiency of the light-transmitting film 170 and the adjacent first functional layer to the sound wave. In addition, in the area of ​​the light-transmitting film 170 far from the first functional layer, the distribution density of the acoustic impedance adjusting particles 172 is relatively small, which is conducive to reducing the adverse effect of the acoustic impedance adjusting particles 172 on the light transmittance of the light-transmitting film 170. For another example, when the acoustic impedance of the first functional layer is smaller than the acoustic impedance of the transparent film body 171, by adding acoustic impedance adjusting particles 172 that can weaken the acoustic impedance into the transparent film body 171, in a partial area of ​​the transparent film 170 close to the first functional layer, the greater the distribution density of the acoustic impedance adjusting particles 172 in this partial area, the smaller the acoustic impedance of the transparent film 170 in this partial area, and the smaller the difference in acoustic impedance between the transparent film 170 and the first functional layer in this partial area, thereby reducing the reflection of sound waves at the interface between the transparent film 170 and the first functional layer, improving the sound wave transmittance, and improving the propagation efficiency of sound waves by the transparent film 170 and the first functional layer. In addition, in another partial area of ​​the transparent film 170 far away from the first functional layer, the distribution density of the acoustic impedance adjusting particles 172 is relatively small, which is beneficial to reducing the adverse effects of the acoustic impedance adjusting particles 172 on the transmittance of the transparent film 170.

[0103] Exemplarily, the material of the acoustic impedance adjusting particles 172 includes an inorganic material, such as an oxide.

[0104] Exemplarily, the material of the acoustic impedance adjusting particles 172 includes at least one of tungsten oxide, zirconium oxide, aluminum oxide, titanium oxide, and silicon oxide.

[0105] Exemplarily, the acoustic impedance adjusting particles 172 include acoustic impedance enhancing nanoparticles, the size of which is much smaller than the wavelength of light. When light encounters the nanoparticles, no obvious diffraction and scattering occurs. The nanoparticles do not affect the propagation of light, and can reduce the influence of the acoustic impedance adjusting particles 172 on the transmittance of the light-transmitting film 170.

[0106] Exemplarily, the material of the light-transmitting film body 171 includes organic material.

[0107] Exemplarily, the material of the light-transmitting film body 171 includes optical adhesive, which can be used to bond with adjacent functional layers (such as the first functional layer and / or the second functional layer), thereby reducing the difficulty of connecting the light-transmitting film 170 with adjacent functional layers.

[0108] Exemplarily, the particle size range of the acoustic impedance adjusting particles 172 is 3nm-100nm, which can avoid the acoustic impedance adjusting particles 172 from having a particle size that is too small, which is beneficial to reducing the difficulty and cost of preparing the acoustic impedance adjusting particles 172. In addition, it can also avoid the acoustic impedance adjusting particles 172 from having a particle size that is too large, which is beneficial to reducing the adverse effects of the acoustic impedance adjusting particles 172 on the transmittance of the light-transmitting film 170.

[0109] For example, the particle size range of the acoustic impedance adjusting particles 172 is 5nm-50nm, which can further help reduce the difficulty and cost of preparing the acoustic impedance adjusting particles 172, and further help reduce the adverse effects of the acoustic impedance adjusting particles 172 on the transmittance of the light-transmitting film 170.

[0110] For example, the particle size of the acoustic impedance adjusting particles 172 may be 3 nm, 5 nm, 10 nm, 20 nm, 40 nm, 50 nm, 60 nm, 80 nm, 100 nm, or any value between 5 nm and 100 nm.

[0111] Exemplarily, the ratio of the sum of the weights of all the acoustic impedance adjusting particles 172 to the weight of the light-transmitting film 170 is in the range of 10%-80%, thereby avoiding the distribution density of the acoustic impedance adjusting particles 172 being too small, which is beneficial for adjusting the acoustic impedance of the light-transmitting film 170 through the acoustic impedance adjusting particles 172. In addition, it is also possible to avoid the distribution density of the acoustic impedance adjusting particles 172 being too large, which is beneficial for reducing the adverse effects of the acoustic impedance adjusting particles 172 on the transmittance of the light-transmitting film 170.

[0112] For example, the ratio of the sum of the weights of all the acoustic impedance adjusting particles 172 to the weight of the light-transmitting film 170 is in the range of 30%-70%, which can further help adjust the acoustic impedance of the light-transmitting film 170 through the acoustic impedance adjusting particles 172, and further help reduce the adverse effects of the acoustic impedance adjusting particles 172 on the transmittance of the light-transmitting film 170.

[0113] For example, the ratio of the sum of the weights of all acoustic impedance adjusting particles 172 to the weight of the light-transmitting film 170 may be 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80% or any value between 10% and 80%.

[0114] Exemplarily, the acoustic impedance of the light-transmitting film 170 is greater than or equal to 1 MRayls, where MRayls means million Rayles.

[0115] For example, the acoustic impedance of the light-transmitting film 170 ranges from 3 MRayls to 9 MRayls.

[0116] For example, the acoustic impedance of the light-transmitting film 170 may be 1 MRayls, 1.5 MRayls, 2 MRayls, 2.5 MRayls, 3 MRayls, 5 MRayls, 7 MRayls, 9 MRayls, or any value greater than 1 MRayls.

[0117] Exemplarily, the acoustic impedance of the acoustic impedance adjusting particle 172 material ranges from 10MRayls to 50MRayls, thereby preventing the acoustic impedance of the acoustic impedance adjusting particle 172 material from being too small and improving the adjustment sensitivity of the acoustic impedance adjusting particle 172. In addition, it can prevent the acoustic impedance of the acoustic impedance adjusting particle 172 material from being too large and improve the adjustment range of the acoustic impedance adjusting particle 172.

[0118] For example, the acoustic impedance of the material of the acoustic impedance adjusting particle 172 ranges from 20 MRayls to 45 MRayls, which can further improve the adjustment sensitivity of the acoustic impedance adjusting particle 172 and further improve the adjustment range of the acoustic impedance adjusting particle 172 .

[0119] For example, the acoustic impedance of the material of the acoustic impedance adjusting particles 172 may be 10 MRayls, 20 MRayls, 30 MRayls, 40 MRayls, 45 MRayls, 50 MRayls, or any value between 10 MRayls and 50 MRayls.

[0120] Exemplarily, the acoustic impedance of the light-transmitting film body 171 is less than or equal to 1 MRayls. For example, the acoustic impedance of the light-transmitting film body 171 may be 0.1 MRayls, 0.3 MRayls, 0.5 MRayls, 0.7 MRayls, or any value less than 1 MRayls.

[0121] Exemplarily, the refractive index of the light-transmitting film 170 is less than or equal to 1.8, so as to avoid the refractive index of the light-transmitting film 170 being too large, which is helpful to reduce the loss of light passing through the light-transmitting film 170 .

[0122] For example, the refractive index of the light-transmitting film 170 is less than or equal to 1.6, which can further help reduce the loss of light passing through the light-transmitting film 170 .

[0123] For example, the refractive index of the light-transmitting film 170 may be 1.1, 1.2, 1.4, 1.6, 1.8, or any value less than 1.8.

[0124] Exemplarily, the light transmittance of the light-transmitting film 170 is greater than or equal to 90%, thereby facilitating light to pass through the light-transmitting film 170 .

[0125] Exemplarily, the light transmittance of the light-transmitting film 170 is greater than or equal to 95%, thereby further facilitating light to pass through the light-transmitting film 170 .

[0126] For example, the light transmittance of the light-transmitting film 170 may be 90%, 91%, 93%, 95%, 97%, or any value greater than 90%.

[0127] Exemplarily, the light transmittance of the light-transmitting film body 171 is greater than or equal to 90%, thereby facilitating light to pass through the light-transmitting film 170 .

[0128] Exemplarily, the light transmittance of the light-transmitting film body 171 is greater than or equal to 95%, thereby further facilitating light to pass through the light-transmitting film 170 .

[0129] The display panel 100 provided in the embodiment of the present application is described below.

[0130] The embodiment of the present application provides a display panel 100, which may be an organic light-emitting diode (OLED) display panel, a micro organic light-emitting diode (Micro OLED) display panel, a light-emitting diode (LED) display panel, a quantum dot light emitting diode (QLED) display panel, a mini light emitting diode (Mini LED) display panel, a micro light emitting diode (Micro LED) display panel, or a liquid crystal (LCD) display panel. The embodiment of the present application is described by taking an OLED display panel as an example.

[0131] In some embodiments, see Figure 5The display panel 100 may include a display area 100a and a non-display area 100b. The display area 100a may be used to display a picture, and the non-display area 100b may be arranged adjacent to the display area 100a. The non-display area 100b may be located on at least one side of the display area 100a. For example, the non-display area 100b may be arranged around the periphery of the display area 100a, and the non-display area 100b may form a "black border" surrounding the periphery of the display area 100a. Alternatively, the display panel 100 may include only the display area 100a, without the non-display area 100b.

[0132] In some embodiments, see Figure 4 , the display area 100a may include a light-emitting area 101a and a non-light-emitting area 102a. A non-light-emitting area 102a is provided between adjacent light-emitting areas 101a, and the non-light-emitting area 102a may be arranged around the outer periphery of the light-emitting area 101a. The light-emitting area 101a is provided corresponding to the light-emitting unit 121, and the orthographic projection of the light-emitting area 101a on the substrate 110 overlaps with the orthographic projection of the corresponding light-emitting unit 121 on the substrate 110. The "light-emitting area 101a" may correspond to the area on the light-emitting unit 121 that plays a major role in emitting light. The light-emitting unit 121 may include a first electrode, a light-emitting functional part, and a second electrode that are sequentially arranged in a direction away from the substrate 110. The light-emitting functional part located in the pixel opening 181 is in direct contact with the first electrode, and the light-emitting functional part located outside the pixel opening 181 is not in direct contact with the first electrode. The light emitted by the part of the light-emitting functional part located outside the pixel opening 181 is weak, or even does not emit light. Therefore, the “light emitting region 101 a ” may correspond to a region where a light emitting functional element located within the pixel opening 181 and in direct contact with the first electrode is located.

[0133] In the embodiment of the present application, the corresponding arrangement of A and B may refer to: one A is correspondingly arranged with at least one B, or one B is correspondingly arranged with at least one A. The embodiment of the present application is described by taking the corresponding arrangement of one A and one B as an example. For example, the corresponding arrangement of the light-emitting unit 121 and the light-emitting area 101a may refer to: one light-emitting unit 121 is correspondingly arranged with at least one light-emitting area 101a, or one light-emitting area 101a is correspondingly arranged with at least one light-emitting unit 121.

[0134] In some embodiments, see Figure 1, the display panel 100 may include a display module 103 and a light-transmitting film 170 in the above-mentioned embodiment. The display module 103 includes at least one functional layer, and the at least one functional layer includes a first functional layer, and the first functional layer and the light-transmitting film 170 are bonded. The light-transmitting film 170 may be arranged on at least one side of the display module 103 along the thickness direction, or the display module 103 may have multiple functional layers, and the multiple functional layers are stacked along the thickness direction of the substrate 110. A light-transmitting film 170 is arranged between at least part of two adjacent functional layers, so that the two adjacent functional layers are connected through the light-transmitting film 170, and the two adjacent functional layers are bonded to the light-transmitting film 170 located between the two adjacent functional layers. The embodiment of the present application does not limit the setting position of the light-transmitting film 170.

[0135] Exemplarily, the number of the light-transmitting films 170 in the display panel 100 is at least one. For example, the number of the light-transmitting films 170 is 1, 2, 3, or any number greater than 3. When the number of the light-transmitting films 170 is plural, the plurality of light-transmitting films 170 are stacked along the thickness direction of the substrate 110 .

[0136] Exemplarily, the absolute value of the difference between the acoustic impedance of the transparent film body 171 and the acoustic impedance of the first functional layer is a first value, the difference between the acoustic impedance of the transparent film 170 and the acoustic impedance of the first functional layer is a second difference, and the second difference is smaller than the first difference. By adding acoustic impedance adjusting particles 172 to the transparent film body 171, the acoustic impedance of the transparent film 170 can be adjusted so that the acoustic impedance of the transparent film 170 is closer to that of the first functional layer, so that the acoustic impedance of the transparent film 170 is more closely matched with that of the first functional layer, which is beneficial to reduce the reflection of sound waves at the interface between the transparent film 170 and the first functional layer, and reduce the loss of sound wave energy caused by the reflection of sound waves, so that more sound waves can pass through the transparent film 170 and the first functional layer, thereby improving the transmittance of the overall structure formed by the transparent film 170 and the first functional layer to sound waves, which is beneficial to improving the sound efficiency and intensity of the display panel 100 and reducing the power consumption of the sound under the screen.

[0137] In some embodiments, see Figure 4 The multiple functional layers of the display module 103 may include a substrate 110, and the substrate 110 may provide support for the remaining functional layers that are subsequently arranged.

[0138] In some embodiments, see Figure 4 The multiple functional layers of the display module 103 may include a light emitting device layer 120, which is disposed on one side of the substrate 110. The light emitting device layer 120 may include a plurality of light emitting units 121, which are spaced apart in a thickness direction perpendicular to the substrate 110. For example, the plurality of light emitting units 121 may be arranged in an array.

[0139] In some embodiments, see Figure 4 A pixel defining layer 180 may be disposed on the periphery of the light-emitting unit 121 , and the pixel defining layer 180 encloses a plurality of pixel openings 181 . The plurality of pixel openings 181 and the plurality of light-emitting units 121 may be disposed correspondingly, and at least a portion of the light-emitting unit 121 may be disposed in the corresponding pixel opening 181 .

[0140] In some embodiments, see Figure 4 The multiple functional layers of the display module 103 may include a cover plate 130. The light emitting device layer 120 is disposed between the substrate 110 and the cover plate 130. The cover plate 130 is used to protect the display panel 100 to prevent the display panel 100 from being scratched when the user uses the display panel 100.

[0141] In some embodiments, see Figure 4 The multiple functional layers of the display module 103 may include an optical layer 140 , and the optical layer 140 is located between the light emitting device layer 120 and the cover plate 130 .

[0142] For some examples, see Figure 2 and Figure 3 The optical layer 140 includes a polarizer 142 . The polarizer 142 may be located in the light-emitting area 101 a and the non-light-emitting area 102 a . The polarizer 142 may be used to reduce reflected light from the external environment and improve the contrast of the display panel 100 .

[0143] For other examples, see Figure 1 and Figure 4 The optical layer 140 includes a filter layer 141. The filter layer 141 may include a plurality of filters. The plurality of filters are arranged correspondingly to the plurality of light-emitting areas 101a. The orthographic projection of the filter on the substrate 110 overlaps with the orthographic projection of the corresponding light-emitting area 101a on the substrate 110. The filter can be used to filter light of a color different from its own. The use of filters instead of polarizers 142 makes the display panel 100 thinner, which is more conducive to the bending of the display panel 100. At the same time, the excellent light transmittance of the filters makes the power consumption required when the display panel 100 is working lower.

[0144] Exemplarily, the plurality of filters may include any one or more of a red filter, a green filter, a blue filter, and a white filter. For example, the filter corresponding to the red light-emitting unit is a red filter, which can block the light emitted by the blue light-emitting unit and the green light-emitting unit, and allow the red light emitted by the red light-emitting unit or the white light-emitting unit to pass through.

[0145] In some embodiments, see Figure 4The multiple functional layers of the display module 103 include a touch layer 150, and the touch layer 150 is disposed between the optical layer 140 and the light emitting device layer 120. The touch layer 150 can be used to implement a touch function.

[0146] In some embodiments, see Figure 4 The multiple functional layers of the display module 103 include a first encapsulation layer 161 , and the first encapsulation layer 161 is located between the light emitting device layer 120 and the touch control layer 150 .

[0147] In some embodiments, see Figure 4 The multiple functional layers of the display module 103 include a second encapsulation layer 162 , and the second encapsulation layer 162 is located between the first encapsulation layer 161 and the light-emitting device layer 120 .

[0148] In some embodiments, see Figure 4 The multiple functional layers of the display module 103 include a third encapsulation layer 163 , and the third encapsulation layer 163 is located between the second encapsulation layer 162 and the light-emitting device layer 120 .

[0149] Exemplarily, the material of the second encapsulation layer 162 includes an organic material. The encapsulation layer formed by the organic material is conducive to relieving stress. For example, it can be prepared by coating, inkjet printing or other methods.

[0150] Exemplarily, the materials of the first encapsulation layer 161 and the third encapsulation layer 163 include inorganic materials. The encapsulation layer of inorganic materials has a good barrier effect on water vapor and oxygen, thereby achieving a good encapsulation effect.

[0151] It should be noted that any one of the substrate 110, the light emitting device layer 120, the first encapsulation layer 161, the second encapsulation layer 162, the third encapsulation layer 163, the touch layer 150, the filter layer 141, and the cover plate 130 may be a functional layer of the display panel 100. The substrate 110, the light emitting device layer 120, the first encapsulation layer 161, the second encapsulation layer 162, and the third encapsulation layer 163 may together form the display screen 104.

[0152] In an embodiment in which the light emitting device layer 120 and the cover plate 130 are provided, the light transparent film 170 may be located between the light emitting device layer 120 and the cover plate 130 .

[0153] The following describes the disposition position of the light-transmitting film 170 provided in the embodiment of the present application in the display module 103 .

[0154] In some embodiments, see Figure 1At least one light-transmitting film 170 includes a first light-transmitting film 170a, and the first light-transmitting film 170a is located between the optical layer 140 and the cover plate 130. The first light-transmitting film 170a can connect the optical layer 140 and the cover plate 130. In addition, the first light-transmitting film 170a can be used to match the acoustic impedance of the cover plate 130 and the optical layer 140, that is, the absolute value of the difference between the acoustic impedance of any one of the cover plate 130 and the optical layer 140 and the acoustic impedance of the first light-transmitting film 170a (that is, the second value and / or the fourth value) is small, so that the acoustic impedance of the first light-transmitting film 170a is highly matched with the acoustic impedance of the adjacent cover plate 130, and the acoustic impedance of the first light-transmitting film 170a is highly matched with the acoustic impedance of the adjacent optical layer 140, thereby reducing sound wave reflection and improving the transmittance of sound waves, which is beneficial to improving the sound efficiency and intensity of the display panel 100 and reducing the power consumption of the sound under the screen.

[0155] In some embodiments, see Figure 2 In an embodiment where there are multiple light-transmitting films 170, the multiple light-transmitting films 170 may include a first light-transmitting film 170a and a second light-transmitting film 170b. The first light-transmitting film 170a is located between the optical layer 140 and the cover plate 130, and the second light-transmitting film 170b is located between the optical layer 140 and the touch layer 150. The role of the first light-transmitting film 170a has been explained and will not be repeated here. The second light-transmitting film 170b can connect the optical layer 140 and the touch layer 150. In addition, the second light-transmitting film 170b can be used to match the acoustic impedance of the touch layer 150 and the optical layer 140, that is, the absolute value of the difference between the acoustic impedance of any one of the touch layer 150 and the optical layer 140 and the acoustic impedance of the second light-transmitting film 170b (that is, the second value and / or the fourth value) is small, so that the acoustic impedance of the second light-transmitting film 170b is more compatible with the acoustic impedance of the adjacent touch layer 150, and the acoustic impedance of the second light-transmitting film 170b is more compatible with the acoustic impedance of the adjacent optical layer 140, thereby reducing sound wave reflection and improving sound wave transmittance, which is beneficial to improving the sound efficiency and intensity of the display panel 100 and reducing the power consumption of under-screen sound.

[0156] In some embodiments, see Figure 3 In the embodiment where the number of the light-transmitting films 170 is multiple, the multiple light-transmitting films 170 may further include a third light-transmitting film 170c, and the third light-transmitting film 170c is located between the display screen 104 and the touch layer 150. For example, the third light-transmitting film 170c is located on the first encapsulation layer 161 ( Figure 4) and the touch layer 150. The third light-transmitting film 170c can connect the first encapsulation layer 161 and the touch layer 150. In addition, the third light-transmitting film 170c can be used to match the acoustic impedance of the touch layer 150 and the first encapsulation layer 161, that is, the absolute value of the difference between the acoustic impedance of any one of the touch layer 150 and the first encapsulation layer 161 and the acoustic impedance of the third light-transmitting film 170c is small, for example, the absolute value of the difference can be less than or equal to 8 MRayls, so that the acoustic impedance of the third light-transmitting film 170c is highly matched with the acoustic impedance of the adjacent touch layer 150, and the acoustic impedance of the third light-transmitting film 170c is highly matched with the acoustic impedance of the adjacent first encapsulation layer 161, so that the reflection of sound waves can be reduced, the transmittance of sound waves can be improved, which is beneficial to improving the sound efficiency and intensity of the display panel 100 and reducing the power consumption of the sound under the screen.

[0157] In some embodiments, see Figure 4 In an embodiment where there are multiple light-transmitting films 170, the multiple light-transmitting films 170 include a fourth light-transmitting film 170d, and the fourth light-transmitting film 170d is reused as the second encapsulation layer 162. In this way, the fourth light-transmitting film 170d can be used to match the acoustic impedance of the first encapsulation layer 161 and the second encapsulation layer 162, thereby reducing sound wave reflection and improving the transmittance of sound waves, which is beneficial to improving the sound efficiency and intensity of the display panel 100 and reducing the power consumption of the sound under the screen. The principle has been explained and will not be repeated here. In addition, the fourth light-transmitting film 170d can also play a packaging role.

[0158] It should be noted that the display panel 100 may be provided with at least one of the first light-transmitting film 170 a , the second light-transmitting film 170 b , the third light-transmitting film 170 c and the fourth light-transmitting film 170 d .

[0159] In some embodiments, see Figure 4 In the same light-transmitting film 170 , the distribution density of the acoustic impedance adjusting particles 172 in the light-transmitting film 170 located in the light-emitting area 101a can be equal to the distribution density of the acoustic impedance adjusting particles 172 in the light-transmitting film 170 located in the non-light-emitting area 102a , which is beneficial to reduce the difficulty of preparing the light-transmitting film 170 .

[0160] In some other embodiments, see Figure 6 In the same light-transmitting film 170, the distribution density of the acoustic impedance adjusting particles 172 in the light-transmitting film 170 located in the light-emitting area 101a may be smaller than the distribution density of the acoustic impedance adjusting particles 172 in the light-transmitting film 170 located in the non-light-emitting area 102a. In this way, the distribution density of the acoustic impedance adjusting particles 172 in the light-transmitting film 170 located in the light-emitting area 101a is smaller, which is beneficial to reducing the adverse effects of the acoustic impedance adjusting particles 172 on the transmittance of the light-transmitting film 170 in the light-emitting area 101a, and is beneficial to improving the light output of the display panel 100.

[0161] In some embodiments, see Figure 6 In the same light-transmitting film 170, the acoustic impedance adjusting particles 172 in the light-transmitting film 170 located in the light-emitting area 101a can be evenly distributed, that is, in different areas of the light-emitting area 101a, the distribution density of the acoustic impedance adjusting particles 172 can be the same, which is beneficial to the display uniformity of the display panel 100 and can also reduce the difficulty of preparing the light-transmitting film 170 in the light-emitting area 101a.

[0162] In some other embodiments, in the same light-transmitting film 170 , the acoustic impedance adjusting particles 172 in the light-transmitting film 170 located in the light-emitting area 101 a may be unevenly distributed, that is, the distribution density of the acoustic impedance adjusting particles 172 may be different in different areas of the light-emitting area 101 a .

[0163] In some embodiments, see Figure 6 In the same light-transmitting film 170, the acoustic impedance adjusting particles 172 in the light-transmitting film 170 located in the non-luminous area 102a can be evenly distributed, that is, in different areas of the non-luminous area 102a, the distribution density of the acoustic impedance adjusting particles 172 is the same, which is beneficial to reduce the difficulty of preparing the light-transmitting film 170 in the non-luminous area 102a.

[0164] In some other embodiments, see Figure 7 In the same light-transmitting film 170 , the acoustic impedance adjusting particles 172 in the light-transmitting film 170 located in the non-luminescent area 102 a may be unevenly distributed, that is, the distribution density of the acoustic impedance adjusting particles 172 may be different in different areas of the non-luminescent area 102 a . Exemplarily, the non-luminous area 102a may include a first sub-area 1021a and a second sub-area 1022a, the first sub-area 1021a is located between the second sub-area 1022a and the luminous area 101a, and the distribution density of the acoustic impedance adjusting particles 172 in the first sub-area 1021a gradually increases from the luminous area 101a to the non-luminous area 102a, that is, the first sub-area 1021a can serve as an acoustic impedance transition zone between the luminous area 101a and the non-luminous area 102a, which is beneficial to prevent the distribution density difference of the acoustic impedance adjusting particles 172 between the luminous area 101a and the non-luminous area 102a from being too large, resulting in a large difference in the acoustic impedance of the transparent film 170 in the two areas, thereby helping to reduce the reflection of sound waves at the interface between the transparent film 170 in the luminous area 101a and the non-luminous area 102a, which is beneficial to improve the sound efficiency and intensity of the display panel 100, and reduce the power consumption of the sound under the screen.

[0165] In the two adjacent functional layers of the display module 103 and the light-transmitting film 170 located between the two adjacent functional layers, the two adjacent functional layers are defined as the first functional layer and the second functional layer. For example, the first functional layer and the second functional layer can be the cover plate 130 and the optical layer 140, respectively, and the light-transmitting film 170 can be the first light-transmitting film 170a. The first functional layer and the second functional layer can be the optical layer 140 and the touch layer 150, respectively, and the light-transmitting film 170 can be the second light-transmitting film 170b. The first functional layer and the second functional layer can be the first encapsulation layer 161 and the touch layer 150, respectively, and the light-transmitting film 170 can be the third light-transmitting film 170c. The first functional layer and the second functional layer can be the first encapsulation layer 161 and the second encapsulation layer 162, respectively, and the light-transmitting film 170 can be the fourth light-transmitting film 170d.

[0166] Exemplarily, the absolute value of the difference between the acoustic impedance of the light-transmitting film body 171 and the acoustic impedance of the second functional layer is a third value, the absolute value of the difference between the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the second functional layer is a fourth value, and the third value is less than the fourth value, or the third value is greater than the fourth value, or the third value is equal to the fourth value.

[0167] Exemplarily, the fourth value is less than or equal to 8MRayls, so that the difference between the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the second functional layer is small, and the acoustic impedance matching is high, thereby reducing the reflection of sound waves and improving the transmittance of sound waves. Wherein, the second value and the fourth value are both less than 8MRayls, that is, in the two adjacent functional layers of the display module 103 and the light-transmitting film 170 located between the two adjacent functional layers, the absolute value of the difference in acoustic impedance between the light-transmitting film 170 and any adjacent functional layer is less than 8MRayls.

[0168] In some embodiments, the acoustic impedance of at least one of the first functional layer and the second functional layer may be greater than the acoustic impedance of the transparent film body 171. The embodiment of the present application is described by taking the acoustic impedance of the first functional layer and the second functional layer as an example in which the acoustic impedance is greater than the acoustic impedance of the transparent film body 171. By adding the acoustic impedance adjusting particles 172 to the transparent film body 171, the acoustic impedance of the transparent film 170 can be adjusted so that the acoustic impedance of the transparent film 170 can be less different from the acoustic impedance of the adjacent functional layers to achieve acoustic impedance matching.

[0169] When the acoustic impedance of the first functional layer is greater than the acoustic impedance of the second functional layer, and / or, when the acoustic impedance of the first functional layer is less than the acoustic impedance of the second functional layer, the acoustic impedance of the light-transmitting film 170 between the first functional layer and the second functional layer can be between the first functional layer and the second functional layer, so that the difference in acoustic impedance between the first functional layer and the light-transmitting film 170 is small, and the difference in acoustic impedance between the second functional layer and the light-transmitting film 170 is small, so as to reduce the reflection of sound waves, improve the transmittance of sound waves, and help improve the sound emission efficiency and intensity of the display panel 100, and reduce the power consumption of the sound emission under the screen. Alternatively, the acoustic impedance of the light-transmitting film 170 between the first functional layer and the second functional layer can be less than the first functional layer and the second functional layer, so that the acoustic impedance of the light-transmitting film 170 is small, which is conducive to reducing the obstruction of the light-transmitting film 170 to the propagation of sound waves. Alternatively, the acoustic impedance of the light-transmitting film 170 between the first functional layer and the second functional layer can be greater than the first functional layer and the second functional layer.

[0170] When the acoustic impedance of the first functional layer is equal to the acoustic impedance of the second functional layer, the acoustic impedance of the light-transmitting film 170 located between the first functional layer and the second functional layer can be equal to the first functional layer and the second functional layer, so that the difference between the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the first functional layer and the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the second functional layer is minimized, so as to reduce the reflection of sound waves and improve the transmittance of sound waves, which is beneficial to improve the sound emission efficiency and intensity of the display panel 100 and reduce the power consumption of the sound emission under the screen. Alternatively, the acoustic impedance of the light-transmitting film 170 located between the first functional layer and the second functional layer can be smaller than that of the first functional layer and the second functional layer, so that the difference between the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the first functional layer and the acoustic impedance of the light-transmitting film 170 and the acoustic impedance of the second functional layer are both small, and in addition, it is beneficial to reduce the obstruction of the light-transmitting film 170 to the propagation of sound waves. Alternatively, the acoustic impedance of the light-transmitting film 170 located between the first functional layer and the second functional layer can be greater than that of the first functional layer and the second functional layer. The embodiment of the present application does not limit the acoustic impedance of the first functional layer, the second functional layer, and the light-transmitting film 170 located between the first functional layer and the second functional layer, as long as the absolute value of the difference between the light-transmitting film 170 and the adjacent first functional layer is less than or equal to 8 MRayls, and the absolute value of the difference between the light-transmitting film 170 and the adjacent second functional layer is less than or equal to 8 MRayls.

[0171] The light emitting device layer 120 provided in the embodiment of the present application is further described below.

[0172] In some embodiments, the light emitting device layer 120 may include a plurality of light emitting units 121, and the light emitting unit 121 may include a first electrode, a light emitting function part, and a second electrode sequentially stacked in a direction away from the substrate 110, and the first electrode may be located on a side of the light emitting function part facing the substrate 110. One of the first electrode and the second electrode may be an anode, and the other of the first electrode and the second electrode may be a cathode.

[0173] Exemplarily, the light-emitting functional component may include a light-emitting material. In addition, the light-emitting functional component may also include one or more of a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), an electron transport layer (ETL), a hole blocking layer (HBL) and an electron blocking layer (EBL).

[0174] Exemplarily, the plurality of light emitting units 121 include, but are not limited to, a red light emitting unit, a green light emitting unit, and a blue light emitting unit. In some other examples, the plurality of light emitting units 121 may also include a white light emitting unit.

[0175] In some embodiments, the display panel 100 may include a Figure 1 The light-emitting side and the backlight side are arranged opposite to each other in the direction Z in the display panel. The light-emitting side is the side used to display the image, and the backlight side is the other side arranged opposite to the light-emitting side along the thickness direction of the display panel. For example, the light-emitting side can be Figure 1 The upper side of the backlight can be Figure 1 Exemplarily, the display panel 100 may include a sound-generating device, which may be disposed on the backlight side of the display module 103 , and the sound-generating device may be used to drive the display module 103 to vibrate to generate sound.

[0176] The display device provided in the embodiment of the present application is described below.

[0177] The embodiment of the present application provides a display device, which may include the display panel 100 in the above embodiment. The display device may be an electronic paper, a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a smart bracelet, a smart watch, a super personal computer, a navigator, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camera, a game console, a clock, a calculator, a television monitor, a computer monitor, a car display (e.g., an odometer display, etc.), a cockpit controller and / or display, a display of a camera view (e.g., a display of a rear-view camera in a vehicle), an electronic billboard or sign, a projector, and other mobile or fixed terminals.

[0178] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0179] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0180] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A light-transmitting film, characterized in that: Applied to a display module, the display module includes at least one functional layer, the at least one functional layer includes a first functional layer, the first functional layer is laminated to the light-transmitting film; the light-transmitting film includes: a light-transmitting film body; wherein the absolute value of the difference between the acoustic impedance of the light-transmitting film body and the acoustic impedance of the first functional layer is a first value; A plurality of acoustic impedance adjustment particles are disposed in the light-transmitting film body; the acoustic impedance of the acoustic impedance adjustment particles is different from the acoustic impedance of the light-transmitting film body; The absolute value of the difference between the acoustic impedance of the light-transmitting film and the acoustic impedance of the first functional layer is a second value, and the second value is smaller than the first value.

2. The light-transmitting film according to claim 1, characterized in that: The acoustic impedance of the acoustic impedance adjusting particles is greater than the acoustic impedance of the light-transmitting film body; Preferably, the acoustic impedance of the first functional layer is greater than the acoustic impedance of the light-transmitting film body; Alternatively, the acoustic impedance of the acoustic impedance adjusting particles is smaller than the acoustic impedance of the light-transmitting film body; Preferably, the acoustic impedance of the first functional layer is smaller than the acoustic impedance of the light-transmitting film body.

3. The light-transmitting film according to claim 1, characterized in that: There are multiple functional layers, and the multiple functional layers include a second functional layer, and the second functional layer is attached to a side of the light-transmitting film away from the first functional layer; The absolute value of the difference between the acoustic impedance of the light-transmitting film body and the acoustic impedance of the second functional layer is a third value, the absolute value of the difference between the acoustic impedance of the light-transmitting film and the acoustic impedance of the second functional layer is a fourth value, and the third value is smaller than the fourth value, or the third value is larger than the fourth value; Preferably, the acoustic impedance of the light-transmitting film body is smaller than the acoustic impedances of the first functional layer and the second functional layer; Preferably, the acoustic impedance of the first functional layer is greater than the acoustic impedance of the second functional layer, the third value is less than the first value, the absolute value of the difference between the first value and the second value is a fifth value, the absolute value of the difference between the third value and the fourth value is a sixth value, and the fifth value is greater than the sixth value; Preferably, the fourth value is less than or equal to 8 MRayls; preferably, the fourth value is less than or equal to 6 MRayls.

4. The light-transmitting film according to any one of claims 1 to 3, characterized in that: The plurality of acoustic impedance adjusting particles are evenly distributed in the light-transmitting film body.

5. The light-transmitting film according to any one of claims 1 to 3, characterized in that: The display module includes a plurality of light-emitting areas and a non-light-emitting area located outside the light-emitting areas; The distribution density of the acoustic impedance adjusting particles located in the light emitting area is less than the distribution density of the acoustic impedance adjusting particles located in the non-light emitting area; Preferably, the non-luminous area includes a first sub-area and a second sub-area, the first sub-area is located between the second sub-area and the luminous area, and the distribution density of the acoustic impedance adjusting particles located in the first sub-area gradually increases from the luminous area to the non-luminous area.

6. The light-transmitting film according to any one of claims 1 to 3, characterized in that: Along the direction from the light-transmitting film to the first functional layer, the distribution density of the acoustic impedance adjusting particles gradually increases.

7. The light-transmitting film according to any one of claims 1 to 3, characterized in that: The material of the acoustic impedance adjusting particles includes inorganic materials; Preferably, the material of the acoustic impedance adjusting particles includes at least one of tungsten oxide, zirconium oxide, aluminum oxide, titanium oxide and silicon oxide; Preferably, the acoustic impedance adjusting particles include acoustic impedance enhancing nanoparticles; Preferably, the material of the light-transmitting film body includes organic material; Preferably, the material of the light-transmitting film body includes optical glue; Preferably, the particle size range of the acoustic impedance adjustment particles is 3nm-100nm; preferably, the particle size range of the acoustic impedance adjustment particles is 5nm-50nm; Preferably, the ratio of the sum of the weights of all the acoustic impedance adjusting particles to the weight of the light-transmitting film is in the range of 10%-80%; preferably, the ratio of the sum of the weights of all the acoustic impedance adjusting particles to the weight of the light-transmitting film is in the range of 30%-70%; Preferably, the acoustic impedance of the light-transmitting film is greater than or equal to 1 MRayls; preferably, the acoustic impedance of the light-transmitting film ranges from 3 MRayls to 9 MRayls; Preferably, the acoustic impedance of the acoustic impedance adjusting particle material is in the range of 10MRayls-50MRayls; preferably, the acoustic impedance of the acoustic impedance adjusting particle material is in the range of 20MRayls-45MRayls; Preferably, the acoustic impedance of the light-transmitting film body is less than or equal to 1 MRayls; Preferably, the refractive index of the light-transmitting film is less than or equal to 1.8; preferably, the refractive index of the light-transmitting film is less than or equal to 1.6; Preferably, the light transmittance of the light-transmitting film is greater than or equal to 90%; preferably, the light transmittance of the light-transmitting film is greater than or equal to 95%; Preferably, the first value is greater than or equal to 10 MRayls; preferably, the first value is greater than or equal to 12 MRayls; Preferably, the second value is less than or equal to 8 MRayls; preferably, the second value is less than or equal to 6 MRayls.

8. A display panel, characterized in that: include: A display module and the light-transmitting film according to any one of claims 1 to 7, wherein the display module comprises at least one functional layer, the at least one functional layer comprises a first functional layer, and the first functional layer is bonded to the light-transmitting film.

9. The display panel according to claim 8, characterized in that: There are a plurality of functional layers, the plurality of functional layers are stacked, and the light-transmitting film is disposed between at least some of two adjacent functional layers; Preferably, the plurality of functional layers include a substrate, a light-emitting device layer and a cover plate, the light-emitting device layer is arranged between the substrate and the cover plate, and the light-transmitting film is located between the light-emitting device layer and the cover plate; Preferably, the plurality of functional layers include an optical layer, the optical layer is located between the light-emitting device layer and the cover plate, the number of the light-transmitting films is at least one, the at least one light-transmitting film includes a first light-transmitting film, and the first light-transmitting film is located between the optical layer and the cover plate; Preferably, the multiple functional layers include a touch layer, and the touch layer is arranged between the optical layer and the light-emitting device layer; the number of the light-transmitting films is multiple, and the multiple light-transmitting films are stacked along the thickness direction of the substrate, and the multiple light-transmitting films include a first light-transmitting film and a second light-transmitting film, the first light-transmitting film is located between the optical layer and the cover plate, and the second light-transmitting film is located between the optical layer and the touch layer; Preferably, the plurality of functional layers include a first encapsulation layer, the first encapsulation layer is located between the light-emitting device layer and the touch layer, and the plurality of light-transmitting films include a third light-transmitting film, the third light-transmitting film is located between the first encapsulation layer and the touch layer; Preferably, the plurality of functional layers include a second encapsulation layer and a third encapsulation layer, the second encapsulation layer and the third encapsulation layer are both located between the first encapsulation layer and the light-emitting device layer, and the second encapsulation layer is located between the first encapsulation layer and the third encapsulation layer; the plurality of light-transmitting films include a fourth light-transmitting film, and the fourth light-transmitting film is reused as the second encapsulation layer; Preferably, the display panel includes a plurality of light-emitting areas and a non-light-emitting area located outside the light-emitting areas; Preferably, the optical layer includes a plurality of filters, the plurality of filters are arranged corresponding to the plurality of light-emitting areas, and the filters overlap with the corresponding light-emitting areas; or, the optical layer includes a polarizer, and the polarizer is located in the light-emitting area and the non-light-emitting area; Preferably, the material of the second encapsulation layer includes organic material; Preferably, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials.

10. A display device, characterized in that: The display panel comprises the display panel described in claim 8 or 9.

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