Highly reliable touch display directional sound production device and manufacturing process therefor

Abstract

Disclosed in the present invention are a highly reliable touch display directional sound production device and a manufacturing process therefor. Said device comprises a vibrating layer and a non-vibrating layer a frame of which is attached to a frame of the vibrating layer. The manufacturing process comprises: on an existing touch control and OLED display module, manufacturing a flexible cover plate and an upper trace of a sound-production layer, so as to form a vibrating layer; using a flexibly foldable UTG as a substrate layer of a non-vibrating layer, and on the UTG substrate layer, forming a microstructure, a second conductive layer and an insulating dielectric layer that constitute a lower trace of the sound-production layer, so as to form a non-vibrating layer; and finally, attaching the frame of the vibrating layer to that of the non-vibrating layer, so as to finally form a touch display directional sound production device that integrates multiple functions such as foldability, touch control, directional sound production and OLED display, which has diversified functions and good application prospects.

Description

High-reliability touch display directional sound device and preparation process thereof TECHNICAL FIELD

[0001] The present application relates to the technical field of screen directional sound technology, and particularly relates to a high-reliability touch display directional sound device and a preparation process thereof. BACKGROUND

[0002] The ultra-thin, narrow-frame, and even full-screen design of display devices leaves less and less space for sound devices. The traditional sound devices are large in size, and the installation position is limited, so it is difficult to find a suitable position and space in the new generation of display devices. Therefore, it is necessary to redesign the sound device that can adapt to the current needs of display devices.

[0003] Some display device manufacturers design a screen to make sound. The screen sound technology, as a kind of surface audio technology, provides a new solution for multimedia audio-visual equipment sound.

[0004] In addition, the touch panel can identify the touch point input by the human hand or the separate input unit, and transmit the information corresponding thereto to the display device above. When the display screen on the electronic device is a foldable display screen, the area for display on the electronic device can be greatly increased to provide a better visual experience for the user. Nowadays, foldable display screens are also increasingly applied to various types of terminal devices, and have good application prospects.

[0005] At present, the directional sound display screen combining foldable, touch, display device and directional sound is being developed. However, the initial developed directional sound display screen product has a certain degree of decline in sound when doing reliability test with increasing aging time. The high-humidity environment is more demanding than the pure high-temperature environment.

[0006] Therefore, how to research a high-reliability touch display directional sound device integrating foldable, display, touch, directional sound and other functions is a problem to be solved at present. SUMMARY

[0007] The purpose of the present application is to provide a high-reliability touch display directional sound device and a preparation process thereof.

[0008] To achieve the above purpose, on the one hand, the present application provides a high-reliability touch display directional sound device, comprising:

[0009] A vibration layer includes a flexible cover plate, a touch and OLED display module, and a sound emitting layer upper line, the sound emitting layer upper line includes a first conductive layer, the flexible cover plate and the first conductive layer are respectively arranged on the upper and lower sides of the touch and OLED display module away from and close to a non-vibration layer.

[0010] A non-vibration layer includes a first UTG substrate layer and a sound emitting layer lower line integrated on the first UTG substrate layer, the sound emitting layer lower line includes a microstructure, a second conductive layer, and an insulating medium layer, the microstructure is directly formed by the first UTG substrate layer and formed on the surface of the first UTG substrate layer close to the vibration layer, the second conductive layer is arranged on the surface of the first UTG substrate layer close to the vibration layer, and the insulating medium layer is arranged on the surface of the second conductive layer close to the vibration layer.

[0011] The frame of the vibration layer and the non-vibration layer is attached, and after being attached, an air gap required for the vibration layer to vibrate up and down is formed between the two through the microstructure.

[0012] In a preferred embodiment, the flexible cover plate includes a second UTG substrate layer, a UTG breakage prevention layer, and an optical layer, the UTG breakage prevention layer is formed on the surface of the second UTG substrate layer away from the touch and OLED display module, and the optical layer is formed on the surface of the UTG breakage prevention layer away from the second UTG substrate layer.

[0013] In a preferred embodiment, the touch and OLED display module includes a POL light modulation layer, a TP touch layer, a TFE thin film encapsulation layer, an OLED light emitting layer, and a TFT circuit layer arranged in the order from top to bottom.

[0014] In a preferred embodiment, an anti-interference layer is further arranged between the touch and OLED display module and the first conductive layer, the anti-interference layer includes a third conductive layer grounded, the third conductive layer is arranged on the surface of the touch and OLED display module close to the non-vibration layer, the first conductive layer is formed on the surface of a substrate layer close to the non-vibration layer, the surface of the substrate layer away from the non-vibration layer is pasted and fixed with the third conductive layer, and the substrate layer includes a polyimide film or a transparent polyimide film layer.

[0015] In a preferred embodiment, the insulating medium layer is a polyester polyol resin layer, which is specifically formed by mixing acrylic copolymer and polyol resin at a ratio of 5% to 30% and performing esterification reaction under a temperature condition of 130°C to 160°C for 30 min to 50 min.

[0016] In a preferred embodiment, the edges of the first conductive layer, the second conductive layer, and the third conductive layer are all provided with an edge conductive layer.

[0017] In a preferred embodiment, the microstructure is a plurality of spaced insulating bumps, the spacing between any two adjacent insulating bumps is 2.2mm-4.2mm, the height of each insulating bump is 7um-10um, and the diameter of each insulating bump is less than 200um.

[0018] In a preferred embodiment, the total thickness of the vibration layer is 170-180um; the sheet resistance of the first conductive layer is 10-100Ω, and the thickness of the first conductive layer is 50-100nm at the nanoscale; the sheet resistance of the second conductive layer is 10-100Ω, and the thickness of the second conductive layer is 50-100nm at the nanoscale; the sheet resistance of the third conductive layer is 100-1000Ω, and the thickness of the third conductive layer is 10-100nm at the nanoscale; the thickness of the insulating medium layer is 10-12um; the thickness of the optical layer is 1-2um; and the thickness of the UTG breakage prevention layer is 2-4um.

[0019] In another aspect, the present application provides a preparation process of a high-reliability touch display directional sound emitting device, comprising:

[0020] S1, preparing a vibration layer, the vibration layer comprising a flexible cover plate, a touch and OLED display module, and a sound emitting layer upper line, the sound emitting layer upper line comprising a first conductive layer, the preparation of the vibration layer comprising:

[0021] S11, forming the first conductive layer on the surface of the touch and OLED display module close to the non-vibration layer;

[0022] S12, bonding the surface of the touch and OLED display module away from the non-vibration layer to the flexible cover plate to form the vibration layer;

[0023] S2, preparing a non-vibration layer, the non-vibration layer comprising a first UTG substrate layer and a sound emitting layer lower line integrated on the first UTG substrate layer, the sound emitting layer lower line comprising a microstructure, a second conductive layer, and an insulating medium layer, the preparation of the non-vibration layer comprising:

[0024] S21, directly forming the microstructure on the surface of the first UTG substrate layer close to the vibration layer;

[0025] S22, forming the second conductive layer on the surface of the first UTG substrate layer close to the vibration layer;

[0026] S23, forming the insulating medium layer on the surface of the second conductive layer close to the vibration layer;

[0027] S3, bonding the frame of the vibration layer and the non-vibration layer, and after bonding, an air gap required for the vibration of the vibration layer is formed between the two through the microstructure.

[0028] In a specific embodiment, an anti-interference layer is further arranged between the touch and OLED display module and the first conductive layer, and the anti-interference layer comprises a third conductive layer grounded;

[0029] The S11 comprises:

[0030] S111, forming the third conductive layer on the surface of the touch and OLED display module close to the non-vibration layer;

[0031] S112, adhering the surface of the third conductive layer close to the non-vibration layer to a substrate layer;

[0032] S113, forming the first conductive layer on the surface of the substrate layer close to the non-vibration layer;

[0033] And / or, the S1 further comprises: forming an edge conductive layer on the edges of the first conductive layer and the third conductive layer, and the S2 further comprises: forming an edge conductive layer on the edges of the second conductive layer.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] 1. The present application forms a vibration layer by making a flexible cover plate and a directional sound layer on the existing touch and OLED display module, and uses a flexible foldable UTG as a substrate layer of the non-vibration layer, forms a microstructure, a second conductive layer and an insulating dielectric layer on the UTG substrate layer to form a directional sound layer, and finally adheres the frame of the vibration layer and the non-vibration layer to form a touch display directional sound device integrating various functions such as folding, touch, directional sound and OLED display, which has multiple functions and good application prospects.

[0036] 2. The present application uses UTG as the vibration and non-vibration substrate layer, which has the advantages of high strength, high Young's modulus, high hardness and high flatness, so the vibration is not easy to deform. In addition, by directly making a microstructure on the UTG substrate layer, it is ensured that the microstructure is made of glass material, which greatly improves the device life and performance stability, and the touch display directional sound device has less vibration frequency drift, high sound pressure size and timbre stability, and improves product reliability.

[0037] 3. The present application uses UTG as the substrate, and the main insulating layer between the vibration layer and the non-vibration layer, i.e. the parallel plate capacitor dielectric layer, uses a special material of polyester polyol resin layer, so that the parallel plate capacitor has a very small polarization electric field of dielectric material under the conditions of direct current / alternating current / direct current+alternating current, normal temperature / high temperature / high humidity, etc., which improves the product reliability.

[0038] 4、The application integrates the touch layer to the UTG base, and adds a anti-interference conductive layer to the UTG base to avoid the touch interference. BRIEF DESCRIPTION OF DRAWINGS

[0039] Fig. 1 is a structural schematic diagram of a touch display directional sound emitting device according to an embodiment of the application;

[0040] Fig. 2 is a structural schematic diagram of a microstructure formed on a UTG substrate layer according to an embodiment of the application;

[0041] Fig. 3 is a flowchart of a preparation process of the touch display directional sound emitting device according to an embodiment of the application.

[0042] Reference signs are as follows:

[0043] 1, vibration layer, 11, flexible cover plate, 111, second UTG substrate layer, 112, first UTG breakage prevention layer, 113, optical layer, 12, touch and OLED display module, 121, POL light adjustment layer, 122, TP touch layer, 123, TFE thin film encapsulation layer, 124, OLED light emitting layer, 125, TFT circuit layer, 13, sound emitting layer upper line, 131, first conductive layer, 14, anti-interference layer, 141, third conductive layer, 142, substrate layer, 2, non-vibration layer, 21, first UTG substrate layer, 22, sound emitting layer lower line, 221, microstructure, 222, second conductive layer, 223, insulating dielectric layer, 23, second UTG breakage prevention layer, 3, edge conductive layer. DETAILED DESCRIPTION

[0044] The specific embodiments of the application are described in detail below, but it should be understood that the scope of protection of the application is not limited by the specific embodiments.

[0045] Unless otherwise clearly indicated, throughout the specification and claims, the term "comprise" or variations such as "comprises" or "comprising" will be understood to imply the inclusion of a stated element or group of elements but not the exclusion of any other element or group of elements.

[0046] In combination with Figs. 1 and 2, the high-reliability touch display directional sound emitting device disclosed by the application comprises a vibration layer 1 and a non-vibration layer 2 which is attached to the frame of the vibration layer 1. The vibration layer 1 is formed by adding a flexible cover plate and a directional sound emitting layer upper line to an existing touch and OLED display module. The flexible foldable UTG is used as the substrate layer of the non-vibration layer, and the microstructure, the second conductive layer and the insulating dielectric layer which constitute the directional sound emitting layer lower line are formed on the UTG substrate layer to form the non-vibration layer 2. Finally, the frame of the vibration layer 1 and the non-vibration layer 2 are attached to each other to form the touch display directional sound emitting device which integrates the functions of folding, touch, directional sound emission and OLED display.

[0047] Specifically, in a specific embodiment, the vibration layer 1 specifically comprises a flexible cover plate 11, a touch and OLED display module 12 and a sound emitting layer upper line 13, wherein the flexible cover plate 11 and the sound emitting layer upper line 13 are respectively arranged on the upper and lower sides of the touch and OLED display module 12 away from and close to the non-vibration layer 2. In implementation, the touch and OLED display module 12 can be realized by using a relatively mature module in the existing liquid crystal display industry. In the embodiment, the touch and OLED display module 12 specifically comprises a POL light modulation layer 121, a TP touch layer 122, a TFE thin film packaging layer 123, an OLED light emitting layer 124 and a TFT circuit layer 125 arranged in a stack from top to bottom, and the structure of each layer is not described here.

[0048] In a specific embodiment, the sound emitting layer upper line 13 specifically comprises a first conductive layer 131, wherein the first conductive layer 131 is arranged on the side (i.e. the lower side of the TFT circuit layer 125) of the touch and OLED display module 12 (specifically the TFT circuit layer 125 of the touch and OLED display module 12) close to the non-vibration layer 2, and is used as a top electrode for vibration sound emission of the vibration layer 2.

[0049] The application integrates the sound emitting layer upper line 13 to the touch and OLED display module 12, and preferably, in order to avoid touch interference, the application adds an anti-interference layer 14 between the touch and OLED display module 12 and the sound emitting layer upper line 13. In a specific embodiment, the anti-interference layer 14 specifically comprises a third conductive layer 141 formed with a conductive pattern required for touch, wherein the third conductive layer 141 is arranged on the surface of the TFT circuit layer 125 close to the non-vibration layer 2, and the third conductive layer 141 is grounded. The first conductive layer 131 is formed on the surface of a substrate layer 142 close to the non-vibration layer 2, and the third conductive layer 141 and the substrate layer 142 are fixedly bonded (specifically by OCA optical adhesive), the substrate layer 142 comprises a polyimide film (i.e. PI film) or a transparent polyimide film (i.e. CPI film), which serves as a carrier of the first conductive layer 131, and the thickness of the substrate layer 142 can be 5um-25um.

[0050] In a specific embodiment, the flexible cover plate 11 specifically comprises a second UTG substrate layer 111, a first UTG breakage prevention layer 112, and an optical layer 113, wherein the second UTG substrate layer 111 is pasted to the POL light modulation layer 121 of the touch and OLED display module 12 through OCA optical glue, the first UTG breakage prevention layer 112 is formed on the surface of the second UTG substrate layer 111 away from the touch and OLED display module 12 (i.e., the upper surface of the second UTG substrate layer 111), and specifically can adopt an HCL layer (i.e., a hybrid connection layer); the optical layer 113 is formed on the surface of the first UTG breakage prevention layer 112 away from the non-vibration layer 2 (i.e., the upper surface of the first UTG breakage prevention layer 112), and in implementation, the optical layer 113 can include any one or two or more of an anti-glare (i.e., AG) layer, an anti-reflection (i.e., AR) layer, an anti-fingerprint (i.e., AF) layer, and a hardening layer (i.e., OC).

[0051] Specifically, in a specific embodiment, the non-vibration layer 2 specifically comprises a first UTG substrate layer 21 and a sound emitting layer 22 integrated on the first UTG substrate layer 21, wherein in a specific embodiment, the sound emitting layer 22 comprises a microstructure 221, a second conductive layer 222, and an insulating medium layer 223, wherein in preparation, the microstructure 221 can be directly formed on the surface of the first UTG substrate layer 21 close to the vibration layer 1 (i.e., the upper surface of the first UTG substrate layer 21) through an exposure and development process / 3D jet printing, that is, the microstructure 221 is directly formed by etching the first UTG substrate layer 21 through an exposure and development process, so the microstructure 221 is also made of glass, which can greatly improve the service life and performance stability of the finally formed touch display directional sound emitting device. The higher the height precision and the lower the height variability of the microstructure 221, the less the vibration frequency drift of the touch display directional sound emitting device formed, and the sound pressure size and timbre stability are high. Compared with the microstructure 221 of the traditional directional sound emitting screen which is prepared from organic / inorganic materials such as polyurethane acrylic resin / epoxy acrylate resin / polyester acrylate resin / photoinitiator / inorganic filler / silicon oxide powder / silicon-based defoamer / alkyd resin, the microstructure 221 of the present application has the advantages of high strength, high Young's modulus, etc. In a specific embodiment, the microstructure 221 can be a plurality of spaced insulating bumps protruding towards the vibration layer 1.

[0052] The second conductive layer 222 is arranged on the surface of the first UTG substrate layer 21 close to the vibration layer 1 (i.e., the upper surface of the first UTG substrate layer 21), and the insulating medium layer 223 is arranged on the surface of the second conductive layer 222 close to the vibration layer 1 (i.e., the upper surface of the second conductive layer 222).

[0053] Preferably, in a specific embodiment, the insulating medium layer 223 of the present application preferably adopts polyester polyol resin layer as a special material, which can be prepared by a special chemical reaction. Specifically, the acrylic copolymer and polyol resin two polar organic materials are mixed in a certain proportion, and then esterification reaction is carried out under conditions such as high temperature / high pressure / UV, to form a relatively molecular symmetric material, i.e. polyester polyol resin layer material, thereby successfully modifying ordinary dielectric material, so that the parallel plate capacitor under DC / AC / DC+AC, and normal temperature / high temperature / high humidity conditions, the dielectric material produces a small polarization electric field, such as less than 10V, and in some implementation cases, the dielectric material shows that the overall capacitor impedance R under forward voltage is greater than that under reverse voltage. Because the work adopts forward voltage, the large R will keep or increase the sound pressure to some extent. In a specific embodiment, the polyester polyol resin layer is formed by mixing acrylic copolymer and polyol resin in a proportion of 5%~30%, and then esterification reaction is carried out under a temperature condition of 130℃~160℃ for 30min~50min.

[0054] In addition, preferably, the non-vibration layer 2 can further include a second UTG rupture prevention layer 23, which is specifically arranged on the surface of the first UTG substrate layer 21 away from the vibration layer 1 (i.e. the lower surface of the first UTG substrate layer 21), and can also specifically adopt an HCL layer (i.e. a hybrid connection layer) for protecting the first UTG substrate layer 21.

[0055] In addition, in order to increase the conductivity of the above-mentioned conductive layer, an edge conductive layer 3 can be additionally provided at the edge of the conductive layer. Specifically, as in the above-mentioned embodiment, the edge conductive layer 3 can be provided at the edge of the first conductive layer 131, the second conductive layer 222 and the third conductive layer 141, such as specifically at the edge of the surface of the first conductive layer 131 close to the non-vibration layer 2, the edge of the surface of the second conductive layer 222 close to the vibration layer 1, and the edge of the surface of the third conductive layer 141 close to the non-vibration layer 2. In this embodiment, an edge insulating layer (not shown in the figure) can also be provided on the edge conductive layer 3 of the first conductive layer 131. In the implementation, the above-mentioned conductive layer can specifically adopt indium tin oxide (i.e. ITO) material. The above-mentioned first and second UTG substrate layers can also be replaced by flexible PI (Polyimide, polyimide) or CPI (Colorless Polyimide, transparent polyimide) film.

[0056] The vibration layer 1 and the non-vibration layer 2 are attached to the frame, and after the attachment, the vibration layer 1 and the non-vibration layer 2 are formed with an air gap required for the vibration layer 1 to vibrate up and down through the microstructure 221, the upper sound layer line 13 and the lower sound layer line 22 constitute a sound emitting screen for directional sound emission, and the formed touch display directional sound emitting device set integrates various functions such as foldability, touch, directional sound emission and OLED display.

[0057] The UTG (Ultra-Thin Glass) is used as the base material layer of the vibration layer 1 and the non-vibration layer 2, which can realize bending and even folding on one hand, and compared with the traditional base material layer using film (such as PET film) material, the UTG base material layer can upgrade the overall thickness of the vibration layer 1 and the non-vibration layer 2 to more than 100 um, and in a specific embodiment, the Young's modulus of the UTG base material layer is more than 100 times of the traditional film material, which can reduce the deformation fatigue problem caused by the vibration of the traditional film material to a certain extent. In addition, the UTG is used as the screen cover plate, and the surface hardness can reach more than 750g 3H. The vibration layer of the traditional directional sound emitting screen uses the film material as the cover plate, and due to the film frame attachment, the film material is thin and the flatness is not enough, so the surface hardness is difficult to reach 750g 3H.

[0058] In the above embodiment, the overall total thickness of the vibration layer 1 is determined according to the thickness of the touch and OLED display module 12, and the total thickness of the vibration layer 1 is preferably 170-180 um, wherein the third conductive layer 141 is grounded, and the sheet resistance thereof can be between 100 Ω and 1000 Ω, and the thickness is nanoscale, which is 10 nm-100 nm; the lower the sheet resistance of the first conductive layer 131, the lower the load power of the sound generating screen, and the sheet resistance is preferably 10 Ω-100 Ω, and the thickness is nanoscale, which is 50 nm-100 nm, so that high transmittance and low load energy consumption can be achieved. The thickness of the optical layer 113 is generally 1 um-2 um; the thickness of the anti-UTG fragmentation layer can be designed according to different scene anti-splashing functions, and the thicker the thickness, the better the anti-splashing effect. In a specific implementation case, the thickness of the anti-UTG fragmentation layer is 2 um-4 um. The second conductive layer 222 is used as a bottom electrode for vibration sound generation, and the sheet resistance thereof is the same as that of the first conductive layer 131, and the lower the sheet resistance, the lower the load power of the sound generating screen, and the sheet resistance is preferably 10 Ω-100 Ω, and the thickness is nanoscale, which is 50 nm-100 nm, so that high transmittance and low load energy consumption can be achieved. The insulating dielectric layer 223 is a dielectric layer, and in a specific implementation case, the thickness thereof can be 10-12 um, and can not be broken down under a high voltage of direct current 300-350 V+ and alternating current 200-300 V. In this embodiment, the spacing between two adjacent microstructures 221 is 2.2 mm-4.2 mm, the height of each insulating bump is 7 um-10 um, and the diameter of the microstructure 221 can be designed according to the visualization degree, such as the optical layer 113 described above as an anti-glare layer (i.e., an AG layer). Since the AG has a certain shielding effect on the microstructure, generally, the maximum diameter of the single cluster / single particle of the microstructure is 100 um-120 um for the AG with a haze of 7%, and the maximum diameter of the single cluster / single particle of the microstructure 221 is less than 200 um for the AG with a haze of 15%.

[0059] In combination with FIG. 3, the application further discloses a preparation process of a high-reliability touch display directional sound generating device, which specifically includes the following steps:

[0060] S1, preparing a vibration layer 1, wherein the process of preparing the vibration layer 1 includes:

[0061] S11, forming a first conductive layer 131 on the surface of the touch and OLED display module 12 close to the non-vibration layer 2;

[0062] S12, bonding the surface of the touch and OLED display module 12 away from the non-vibration layer 2 to the flexible cover plate 11 to form the vibration layer 1;

[0063] S2, preparing a non-vibration layer 2, wherein the process of preparing the non-vibration layer 2 includes:

[0064] S21, directly forming a microstructure 221 on the surface of the first UTG substrate layer 21 close to the vibration layer 1;

[0065] S22, forming a second conductive layer 222 on the surface of the first UTG substrate layer 21 close to the vibration layer 1;

[0066] S23, forming an insulating medium layer 223 on the surface of the second conductive layer 222 close to the vibration layer 1;

[0067] S3, the frame of the vibration layer 1 and the non-vibration layer 2 is adhered.

[0068] Taking a specific embodiment as an example, the preparation process of the touch display directional sound emitting device in the above embodiment is specifically introduced. It specifically includes the following steps:

[0069] Preparation of the vibration layer 1, which specifically includes:

[0070] Preparation of the flexible cover plate 11, specifically including: using a wire bar coating / 3D jet printing HCL on the surface of the second UTG substrate layer 111 to form a first UTG breakage prevention layer 112, and then forming an optical layer 113 on the surface of the first UTG breakage prevention layer 112.

[0071] Integrating the sound emitting layer upper line 13 on the touch and OLED display module 12, specifically including: forming a third conductive layer 141 on the surface of the touch and OLED display module 12 by magnetron sputtering / evaporation of ITO, then forming an edge conductive layer 3 on the surface edge of the third conductive layer 141 by magnetron sputtering with a mask plate, then adhering the surface of the third conductive layer 141 to the PI liquid crystal glass directional layer 142 through OCA optical glue by a soft-to-soft / soft-to-hard bonding machine, after bonding, forming a first conductive layer 131 on the surface of the PI liquid crystal glass directional layer 142 by magnetron sputtering / evaporation of ITO, and then forming an edge conductive layer 3 on the surface edge of the first conductive layer 131 by magnetron sputtering with a mask plate.

[0072] Adhering the above flexible cover plate 11 and the touch and OLED display module 12 integrated with the sound emitting layer upper line 13 to form the vibration layer 1.

[0073] Preparation of the non-vibration layer 2, which specifically includes:

[0074] The first UTG substrate layer 21 is exposed and developed to form a microstructure, and then a second conductive layer 222 is formed on the upper surface of the first UTG substrate layer 21, and a second UTG breakage prevention layer 23 is formed on the lower surface, wherein the second conductive layer 222 is preferably formed by a magnetron sputtering / vapor deposition process. Then, a surface of the second conductive layer 222 is coated with copper by magnetron sputtering, and then the copper is exposed and developed to form an edge conductive layer 3. Finally, an insulating medium layer 223 is formed on the upper surface of the second conductive layer 222, and the process preferably uses a wire bar coating / 3D jet printing insulating medium material.

[0075] The frame of the vibration layer 1 and the non-vibration layer 2 is attached, and the attachment process specifically includes: placing the vibration layer 1 flat on the attachment machine platform A, adjusting the adsorption pressure, keeping the vibration layer 1 flat and not moving; placing the non-vibration layer 2 flat on the platform B, starting the attachment button, and displaying OK through CCD alignment, the surface of the vibration layer 1 and the non-vibration layer 2 are in contact, and the attachment is completed.

[0076] The advantages of the present application are as follows: 1. The present application forms a vibration layer by forming a flexible cover plate and a directional sound layer on the existing touch and OLED display module, and uses a flexible foldable UTG as a substrate layer of a non-vibration layer, forms a microstructure, a second conductive layer and an insulating medium layer on the UTG substrate layer to form a directional sound layer, and finally forms a touch display directional sound device integrating various functions such as folding, touch, directional sound and OLED display by attaching the frame of the vibration layer and the non-vibration layer, which has various functions and good application prospects. 2. The present application uses UTG as a vibration and non-vibration substrate layer, which has the advantages of high strength, high Young's modulus, high hardness and high flatness, so that vibration is not easy to deform. In addition, by directly forming a microstructure on the UTG substrate layer, it is ensured that the microstructure is made of glass, which greatly improves the device life and performance stability, and the touch display directional sound device has less vibration frequency drift, high sound pressure size and timbre stability, and improves product reliability. 3. The present application uses UTG as a substrate, and the main insulating layer between the vibration layer and the non-vibration layer, i.e. the parallel plate capacitor dielectric layer, uses a special material of polyester polyol resin layer, so that the parallel plate capacitor has a very small polarization electric field under the conditions of direct current / alternating current / direct current+alternating current, normal temperature / high temperature / high humidity, etc., and improves product reliability. 4. The present application integrates the touch layer on the UTG substrate, and additionally adds a anti-interference conductive layer on the UTG substrate to avoid touch interference.

[0077] The foregoing description of specific exemplary embodiments of the application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. It is intended that the scope of the application be limited not with this detailed description, but rather by the claims appended hereto.

Claims

1. A high-reliability touch display directional sound emitting device, characterized in that, The device comprises: a vibration layer, the vibration layer comprising a flexible cover plate, a touch and OLED display module, and a sound emitting layer upper line, the sound emitting layer upper line comprising a first conductive layer, the flexible cover plate and the first conductive layer being respectively arranged on the upper and lower sides of the touch and OLED display module away from and close to a non-vibration layer; a non-vibration layer, the non-vibration layer comprising a first UTG substrate layer and a sound emitting layer lower line integrated on the first UTG substrate layer, the sound emitting layer lower line comprising a microstructure, a second conductive layer, and an insulating medium layer, the microstructure being directly formed by the first UTG substrate layer and formed on the surface of the first UTG substrate layer close to the vibration layer, the second conductive layer being arranged on the surface of the first UTG substrate layer close to the vibration layer, and the insulating medium layer being arranged on the surface of the second conductive layer close to the vibration layer; the frames of the vibration layer and the non-vibration layer are attached, and after being attached, an air gap required for the vibration layer to vibrate up and down is formed between the two through the microstructure. 2.The high-reliability touch display directional sound emitting device of claim 1, wherein, The flexible cover plate comprises a second UTG substrate layer, a UTG breakage prevention layer, and an optical layer, the UTG breakage prevention layer being formed on the surface of the second UTG substrate layer away from the touch and OLED display module, and the optical layer being formed on the surface of the UTG breakage prevention layer away from the second UTG substrate layer. 3.The high-reliability touch display directional sound emitting device of claim 1, wherein, The touch and OLED display module comprises, from top to bottom, a POL light modulation layer, a TP touch layer, a TFE thin film packaging layer, an OLED light emitting layer, and a TFT circuit layer arranged in this order. 4.The high-reliability touch display directional sound emitting device of claim 2, wherein, An anti-interference layer is further arranged between the touch and OLED display module and the first conductive layer, the anti-interference layer comprising a third conductive layer grounded, the third conductive layer being arranged on the surface of the touch and OLED display module close to the non-vibration layer, the first conductive layer being formed on the surface of a substrate layer close to the non-vibration layer, the surface of the substrate layer away from the non-vibration layer being pasted and fixed with the third conductive layer, and the substrate layer comprising a polyimide film or a transparent polyimide film.

5. The high-reliability touch display directional sound emitting device according to claim 1, wherein, The insulating medium layer is a polyester polyol resin layer, which is specifically formed by mixing an acrylic copolymer and a polyol resin at a ratio of 5% to 30% and performing esterification reaction at a temperature of 130°C to 160°C for 30 minutes to 50 minutes. 6.The high-reliability touch display directional sound emitting device of claim 4, wherein, The edges of the first conductive layer, the second conductive layer, and the third conductive layer are each provided with an edge conductive layer. 7.The high-reliability touch display directional sound emitting device of claim 1, wherein, The microstructure is a plurality of insulating protrusions arranged at intervals, the distance between two adjacent insulating protrusions is 2.2mm to 4.2mm, the height of each insulating protrusion is 7um to 10um, and the diameter is less than or equal to 200um. 8.The high-reliability touch display directional sound emitting device of claim 4, wherein, The total thickness of the vibration layer is 170-180 um; the square resistance of the first conductive layer is 10-100 Ω, and the thickness is 50-100 nm in nanoscale; the square resistance of the second conductive layer is 10-100 Ω, and the thickness is 50-100 nm in nanoscale; the square resistance of the third conductive layer is 100-1000 Ω, and the thickness is 10-100 nm in nanoscale; the thickness of the insulating medium layer is 10-12 um; the thickness of the optical layer is 1-2 um; and the thickness of the anti-UTG rupture layer is 2-4 um.

9. A preparation process of a high-reliability touch display directional sound production device, characterized in that, The preparation process comprises: S1, preparing a vibration layer, the vibration layer comprising a flexible cover plate, a touch and OLED display module, and a sound generating layer upper line, the sound generating layer upper line comprising a first conductive layer, the preparation of the vibration layer comprising: S11, forming the first conductive layer on the surface of the touch and OLED display module close to the non-vibration layer; S12, bonding the surface of the touch and OLED display module away from the non-vibration layer to the flexible cover plate to form the vibration layer; S2, preparing a non-vibration layer, the non-vibration layer comprising a first UTG substrate layer and a sound generating layer lower line integrated on the first UTG substrate layer, the sound generating layer lower line comprising a microstructure, a second conductive layer, and an insulating medium layer, the preparation of the non-vibration layer comprising: S21, directly forming the microstructure on the surface of the first UTG substrate layer close to the vibration layer; S22, forming the second conductive layer on the surface of the first UTG substrate layer close to the vibration layer; S23, forming the insulating medium layer on the surface of the second conductive layer close to the vibration layer; S3, bonding the frame of the vibration layer and the non-vibration layer, and after bonding, an air gap required for the vibration of the vibration layer is formed between the two through the microstructure.

10. The preparation process of the high-reliability touch display directional sound production device according to claim 9, wherein, A anti-interference layer is further arranged between the touch and OLED display module and the first conductive layer, the anti-interference layer comprising a third conductive layer grounded; The S11 comprises: S111, forming the third conductive layer on the surface of the touch and OLED display module close to the non-vibration layer; S112, bonding the surface of the third conductive layer close to the non-vibration layer to a substrate layer; S113, forming the first conductive layer on the surface of the substrate layer close to the non-vibration layer; And / or, the S1 further comprises: forming an edge conductive layer on the edge of the first conductive layer and the third conductive layer, and the S2 further comprises: forming an edge conductive layer on the edge of the second conductive layer.

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