CN114937428B - Vibrating layer tensioning process of directional sounding display screen - Google Patents

Vibrating layer tensioning process of directional sounding display screen Download PDF

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Publication number
CN114937428B
CN114937428B CN202210469615.3A CN202210469615A CN114937428B CN 114937428 B CN114937428 B CN 114937428B CN 202210469615 A CN202210469615 A CN 202210469615A CN 114937428 B CN114937428 B CN 114937428B
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layer
tensioning
display screen
glue
vibration
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CN114937428A (en
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胡亚云
匡正
毛峻伟
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Suzhou Hear Acoustic Technology Ltd
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Suzhou Hear Acoustic Technology Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F27/00—Combined visual and audible advertising or displaying, e.g. for public address
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention discloses a vibrating layer tensioning process of a directional sounding display screen, which comprises the following steps: s1, performing frame bonding on a frame bonding area at the outer edge of the vibration layer and a frame bonding area at a position corresponding to the non-vibration layer, wherein a glue filling area is formed between the outer side of the bonded frame bonding area and the edge of the display screen; s2, filling glue into a glue filling area, carrying out overall heating, shrinkage and tensioning on the vibration layer after glue filling, curing glue filled with glue while heating, wherein the heating temperature is higher than the curing temperature of the glue, and the heating time is longer than the curing time of the glue. According to the invention, the polaroid of the display screen is used as a core layer of the vibration layer, the light-emitting layer of the display screen is used as a non-vibration layer, the combination of the existing display screen and the directional sound-emitting screen is realized, and the vibration layer and the non-vibration layer are firstly subjected to glue filling and fixing, then are subjected to heating tensioning and the like, so that the tension degree and the flatness of the vibration layer of the display screen are ensured, and the sound-emitting efficiency of the whole directional sound-emitting display screen is ensured.

Description

Vibrating layer tensioning process of directional sounding display screen
Technical Field
The invention relates to the technical field of directional sounding of screens, in particular to a vibrating layer tensioning process of a directional sounding display screen.
Background
The ultra-thin, narrow bezel, and even full screen design of the display device leaves less and less room for the sound emitting device. While the conventional sound emitting device is large in size, the installation position is limited, and it is difficult to have a proper position and space in the new generation of display devices. Therefore, there is a need to redesign sound emitting devices that can accommodate the needs of current display devices.
Some manufacturers of display devices design a mode of sounding with a screen, and the screen sounding technology is used as a surface audio technology, so that a new solution is provided for the sound of the multimedia audio-visual equipment. At present, transparent screen-oriented speakers combining a display device with an ultrasonic transducer are under development.
The stacking design of the conventional transparent screen directional loudspeaker is various, wherein one design thought is to take a polaroid as an acoustic vibration layer, the surface treatment process of each polaroid is different, and the tensioning technology of a finished product of the corresponding polaroid is also different. For the directional sounding system, the acoustic vibrating layer needs to vibrate to sound, so that as much area as possible needs to be reserved to be contacted with the air layer, and two sides are contacted with the air layer instead of the single side being fixed with other layers in a full-fit mode. As the material of the vibration layer is exposed in the air, the material absorbs moisture in the air and expands and contracts, so that the requirement of customers is not met. In addition, because the upper and lower material water absorption rate, the expansion and contraction rate and the like of the acoustic vibrating layer are inconsistent, the sounding material is more likely to wrinkle when the vibrating layer is exposed in the environment.
Because the acoustic vibrating layer needs vibrating and sounding, the acoustic vibrating layer and the non-vibrating layer are generally fixed in a frame pasting mode, and because the vibrating layer adopts the frame pasting mode, and the frame pasting edge area of the display device is a narrow frame area, if the vibrating layer and the non-vibrating layer are pasted by adopting a traditional common pasting machine, other processes are not performed, the finished product cannot ensure the tension of the vibrating layer, and the appearance detection vibrating layer is easy to be in a partial or whole fold state under the conventional light.
Therefore, how to ensure the flatness and the tension of the vibration layer in the processing technology is one of important factors for improving the function grade and the appearance grade of the transparent screen directional loudspeaker product.
The invention comprises the following steps:
the invention aims to provide a vibrating layer tensioning process of a directional sounding display screen, so as to ensure flatness, tension and the like of the vibrating layer.
In order to achieve the above purpose, the invention provides a vibrating layer tensioning process of a directional sounding display screen, which comprises the following steps:
s1, performing frame bonding on a frame bonding area at the outer edge of a vibration layer and a frame bonding area at a position corresponding to a non-vibration layer, wherein a glue filling area is formed between the outer side of the frame bonding area and the edge of a display screen after bonding;
s2, filling glue into the glue filling area, carrying out overall heating, shrinkage and tensioning on the vibration layer after glue filling, and curing glue filled with glue while heating, wherein the heating temperature is higher than the curing temperature of the glue, and the heating time is longer than the curing time of the glue.
On the other hand, the invention also provides another vibrating layer tensioning process of the directional sounding display screen, which comprises the following steps:
s10, tensioning the vibration layer by adopting a tensioning jig;
s20, under the condition that the vibration layer is kept in a tensioning state, the frame pasting area at the outer edge of the vibration layer is subjected to frame pasting at the position corresponding to the non-vibration layer, and a glue filling area is formed between the outer side of the frame pasting area and the edge of the display screen after pasting;
and S30, filling glue into the glue filling area under the condition that the vibration layer is kept in a tensioning state, and curing the glue after filling the glue.
In a preferred embodiment, the vibration layer includes a polarizer including a first TAC film, a PVA film, and a second TAC film, or any one of a PMMA film, a PC film, and a COP film is used instead of the first TAC film and/or the second TAC film.
In a preferred embodiment, the vibration layer further includes a first electrode, the first electrode includes a first conductive layer and a first edge trace, the first conductive layer is disposed on a surface of the polarizer, which is close to the non-vibration layer, and the first edge trace is disposed on an outer edge of a surface of the first conductive layer, which is close to the non-vibration layer.
In a preferred embodiment, a first waterproof layer is disposed on an outer surface of the polarizer far from the non-vibration layer, or a second waterproof layer covering the whole first conductive layer or a first frame waterproof layer covering only the first edge trace is disposed on a surface of the first conductive layer near the non-vibration layer, or a first waterproof layer and a second waterproof layer/first frame waterproof layer are disposed on the polarizer and the first conductive layer, respectively.
In a preferred embodiment, when the polarizer and the first conductive layer are respectively provided with a first waterproof layer and a second waterproof layer, the first waterproof layer and the second waterproof layer are formed by processing in a silk-screen mode, and the first waterproof layer and the second waterproof layer are transparent insulating ink layers, at this time, the heating temperature of the S2 is 80-110 ℃, and the heating time is not less than 30min.
In a preferred embodiment, in the step S2, when the transparent insulating ink layer is used as the colloid, the first curing is performed at a heating temperature of 90-100 ℃ for 40-50 min, and then the second curing is performed at a heating temperature of 110-120 ℃ for 10-20 min; or the heating temperature is 90-100 ℃ and the heating time is 40-60 min for curing.
In a preferred embodiment, when the polarizer and the first conductive layer are respectively provided with a first waterproof layer and a second waterproof layer, the first waterproof layer and the second waterproof layer are formed by processing in a silk-screen manner, and the colloid is made of organic silica gel, at this time, the heating temperature of S2 is above 85 ℃, and the heating time is not less than 30min.
In a preferred embodiment, the silk-screen thickness of the first waterproof layer and the second waterproof layer is less than 2 um.
In a preferred embodiment, the process further comprises:
s0, tensioning the vibration layer by adopting a tensioning jig, and simultaneously heating the vibration layer at the temperature of 80-110 ℃, wherein the vibration layer is kept in a tensioning state in the heating process;
in S1, the same heating temperature as that in S0 is kept for frame bonding; the glue filling and the heat shrinkage tensioning are carried out in S2 by keeping the same heating temperature as in S0.
In a preferred embodiment, in S0, the vibration layer is maintained in a humidity environment of less than 90% during heating.
In a preferred embodiment, the colloid is a UV glue, and in S30, UV light is applied to the UV glue for curing.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the polaroid of the display screen is used as a core layer of the vibrating layer, the light-emitting layer of the display screen is used as a non-vibrating layer, the combination of the existing display screen and the directional sound-emitting screen is realized, and the vibrating layer and the non-vibrating layer are firstly subjected to glue filling and fixing, then are subjected to heating and tensioning, or the vibrating layer is clamped through a clamp in the whole process and is then subjected to glue filling and fixing, and the clamping is performed, and meanwhile, the heating and tensioning or direct light curing are performed, so that the tension and the flatness of the vibrating layer of the display screen are ensured, and the sound-emitting efficiency of the whole directional sound-emitting display screen is ensured.
2. According to the invention, through different glue filling colloid, different polaroid structures and the like and different tensioning processes, the optimal tension and flatness of the vibration layer are maintained in the frame attaching process.
Description of the drawings:
FIG. 1 is a schematic flow chart of a tensioning process according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a directional sounding display screen according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a directional sounding display screen according to another embodiment of the present invention;
FIG. 4 is a schematic flow chart of a tensioning process according to another embodiment of the present invention;
FIG. 5 is a schematic flow chart of a tensioning process according to another embodiment of the present invention;
the reference numerals are:
1. vibration layer, 11, polaroid, 12, first electrode, 121, first conductive layer, 122, first edge wire, 13, first waterproof layer, 14, second waterproof layer, 2, non-vibration layer, 21, display layer, 22, second electrode, 221, second conductive layer, 222, second edge wire, 23, microstructure, 24, third waterproof layer.
The specific embodiment is as follows:
the following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
Before the process of the invention is described, the structure of the directional sounding display screen of the invention is specifically described. As shown in fig. 2 and 3, in particular, the directional sound emitting display of the present invention includes a vibration layer 1 and a non-vibration layer 2 stacked one on another, wherein the vibration layer 1 includes a polarizer 11 and a first electrode 12, and wherein the polarizer 11 is used as a core layer of the vibration layer 1, and the material thereof is not limited to the use of a bi-TAC (triacetate fiber film) film + PVA (polyvinyl alcohol film) film, i.e., a first TAC film, a PVA film and a second TAC film, or the use of any one of a PMMA (a transparent thermoplastic polymer) film, a PC (Polycarbonate) film, a Cop film instead of one of the TAC films or the use of two TAC films. However, for the traditional polaroid, the surface of the TAC film/PC film/Cop film is provided with a PSA (pressure sensitive adhesive) adhesive layer which is used for being fully attached to the surface of the display layer. However, for the directional sound emitting display of the present invention, since the polarizer 11 is used as a vibration layer, a larger area is required to contact air, and thus the PSA glue layer needs to be eliminated. And because of the material characteristics of the polaroid 11, the polarized light molecules are stretched to a certain extent in the manufacturing process of the polaroid 11, compared with the optical conductive films made of PET materials and the like, the material is ensured to be stable in size without ageing, and the preparation method is that: the full lamination + control process temperature is lower than a certain heating temperature (generally 90 ℃) and waterproof to keep the material from expanding and shrinking. However, the directional sounding display screen needs a polarizer frame, and if no stacking design and additional manufacturing process are performed, the material has low reliability: such as loose wrinkles, reduced function (reduced sound pressure), etc., wherein the loose wrinkles are due to: the material is exposed in the air, and the material absorbs moisture in the air and swells and contracts, so that the reliability requirement is not met. In addition, because of the water absorption rate of the TAC films or the upper and lower material base films on the upper and lower surfaces of the polarizer 11 with different stacked structures, the expansion and contraction rates are inconsistent, so that material wrinkles are more likely to occur when the vibration layer is exposed in the environment.
Since the core layer of the vibration layer 1 in the present application is the polarizer 11, and since the surface of the polarizer 11 is not provided with PSA glue, the substrate is not limited, and the first electrode 12 needs to be made on the surface (i.e. the lower surface) of the raw material coiled material of the polarizer 11, which is close to the non-vibration layer 2. In practice, the first electrode 12 includes a first conductive layer 121 and a first edge trace 122, where the first conductive layer 121 is disposed on a surface (i.e., a lower surface) of the polarizer 11 near the non-vibration layer 2. In implementation, the material of the first conductive layer 121 needs to be transparent, and any one of conventional Indium Tin Oxide (ITO), metal wire (metal mesh), nano silver, and metal mesh may be adopted, or several kinds of stacked materials may be adopted. The lower the sheet resistance of the conductive layer is, the better.
After the polarizer 11 with the first conductive layer 121 is cut into a sheet, a first edge trace 122 needs to be made on the surface of the first conductive layer 121, where the first edge trace 122 is disposed at the outer edge of the surface (i.e., the lower surface) of the first conductive layer 121 near the non-vibration layer 2. The first edge trace 122 may be silver paste (e.g., NT-TL50D low resistance silver paste), copper trace, or the like. After the common FPC bonding area is reserved on the first edge routing 122, in implementation, no waterproof layer may be disposed on the polarizer 11 and the first conductive layer 121, so that the overall thickness of the vibration layer 1 may be reduced, or a first waterproof layer 13 may be disposed on an outer surface of the polarizer 11 away from the non-vibration layer 2, or a second waterproof layer 14 covering the entire first conductive layer 121 may be disposed on a surface of the first conductive layer 121 near the non-vibration layer 2, or a first frame waterproof layer (not shown) covering only the first edge routing 122 may be disposed on each of the polarizer 11 and the first conductive layer 121, or the first waterproof layer 13 and the second waterproof layer 14/the first frame waterproof layer may be disposed on each of the polarizer 11 and the first conductive layer 121, which may also play a role of insulation short circuit while playing a role of waterproof, and may increase reliability of a product, and prolong a service life of the product. In the implementation, the material shrinkage rate of the waterproof layer is required to be low, and the thicker the thickness is, the easier the polarizer is to neutralize the swelling and shrinkage in the environment. In one embodiment, the first waterproof layer 13 and the second waterproof layer 14 are formed by silk-screen printing, and may be a transparent insulating ink layer, specifically, may be an NSD9 transparent insulating ink layer. The thickness of the silk-screen of the first waterproof layer 13 and the second waterproof layer 14 is less than 2um, that is, the thickness of the single-sided waterproof layer is less than 2um, because the higher the overall thickness of the vibration layer 1 of the directional sounding display screen is, the lower the carrier frequency is, the lower the sounding efficiency is under certain matching conditions, so conversely, the lower the overall thickness of the vibration layer 1 is, the higher the carrier frequency is, and the higher the sounding efficiency is under certain matching conditions. I.e. the thinner the waterproof layer, the higher the sound production efficiency, in one embodiment a nano-scale fluorine (F) layer can be made.
The non-vibration layer 2 of the present invention includes a display layer 21, a second electrode 22, and a microstructure 23, wherein the display layer 21 may be an OLED display layer, an LED display layer, or an LCD display layer. The second electrode 22 includes a second conductive layer 221 and a second edge trace 222, the second conductive layer 221 is disposed on a surface (i.e. an upper end surface) of the display layer 21 near the vibration layer 1, and the second edge trace 222 is disposed on an edge of the second conductive layer 221 near the upper surface of the vibration layer 1. In addition, a third waterproof layer 24 covering the second conductive layer 221 and the second edge wire 222 may be formed over the second conductive layer 221 and the second edge wire 222, or a second frame waterproof layer (not shown) covering the second edge wire 222 may be formed over the second edge wire 222.
The microstructure 23 is located between the first conductive layer 121 and the second conductive layer 221. The microstructure 23 may optionally be disposed under the first waterproof layer 13, or may optionally be disposed on the third waterproof layer 24, preferably on the second waterproof layer 24, so that the thickness of the entire vibration layer 1 may be reduced, thereby improving the overall sound pressure level of the product. Since the present invention focuses on tensioning the vibration layer 1, the structure of the non-vibration layer 2 will not be described here.
As shown in fig. 1, the vibration layer tensioning process of the directional sounding display screen disclosed in one embodiment of the invention specifically comprises the following steps:
s1, performing frame bonding on a frame bonding area at the outer edge of the vibration layer 1 and a frame bonding area at a position corresponding to the non-vibration layer 2, and forming a glue filling area between the outer side of the bonded frame bonding area and the edge of the display screen.
The vibration layer 1 and the non-vibration layer 2 are subjected to frame lamination, and specifically: and (3) performing frame bonding (specifically, bonding through double-sided adhesive tape) on the frame bonding area at the outer edge of the vibration layer 1 and the frame bonding area at the position corresponding to the non-vibration layer 2, wherein a glue filling area (not shown) is formed between the outer side of the bonded frame bonding area and the edge of the display screen.
S2, filling glue into a glue filling area, and after glue filling, carrying out overall heating, shrinkage and tensioning on the vibration layer 1, and curing glue filled with glue while heating, wherein the heating temperature is higher than the curing temperature of the glue, and the heating time is longer than the curing time of the glue.
Specifically, glue is filled into the glue filling area, and different glue filling bodies and different materials of the waterproof layer correspond to tensioning conditions of different vibrating layer tensioning processes. The colloid of the filling glue is solidified while heating and shrinking and tensioning are generally adopted. Wherein the heating temperature is higher than the curing temperature of the colloid, and the heating time is longer than the curing time of the colloid. When the first waterproof layer and the second waterproof layer are transparent insulating ink layers, the heating temperature is 80-110 ℃, and the heating time is not less than 30min. In one curing case, the first curing is performed at a heating temperature of 90-100 ℃ for 40-50 min, and then the second curing is performed at a heating temperature of 110-120 ℃ for 10-20 min.
In practice, if the colloid is organic silica gel (such as 8530A/B organic silica gel), the heating temperature is above 85deg.C, and the heating time is not less than 30min.
In addition, as shown in fig. 4, before the frame is pasted, the vibration layer 1 can be tensioned by adopting a tensioning jig, and meanwhile, the vibration layer 1 is heated, the heating temperature is 80-110 ℃, and the vibration layer 1 is kept in a tensioned state in the heating process. In S1, the same heating temperature as that in S0 is kept for frame bonding; the glue filling and the heat shrinkage tensioning are carried out in S2 by keeping the same heating temperature as in S0. During this heating, the vibration layer 1 can be kept in a humidity environment of less than 90%.
In addition, if the colloid is a colloid that does not need to be cured by heating, such as UV colloid, UV3217/SOMIDA 3807 may be selected, and the colloid is cured by UV light, so the heating curing operation may not be performed, and the specific steps are as shown in fig. 5: firstly, tensioning the vibration layer 1 by adopting a tensioning jig, wherein the tensioning degree can be measured visually or by using a pressure gauge; under the condition that the vibration layer 1 is kept in a tensioning state, the frame pasting area at the outer edge of the vibration layer 1 is subjected to frame pasting at the position corresponding to the non-vibration layer 2, and a glue filling area is formed between the outer side of the frame pasting area after pasting and the edge of the display screen; and filling UV glue into the glue filling area under the condition that the vibration layer 1 is kept in a tensioning state, and carrying out UV light curing on the glue filling UV glue after glue filling. Finally, loosening the tensioning jig, and performing processes such as edge cutting.
The vibration layer tensioning process of the various directional sound emitting display screens of the present invention is described in several specific embodiments below.
Example 1
In this embodiment, the structure of the directional sounding display screen is shown in fig. 2, wherein the first waterproof layer 13 is an NSD9 transparent insulating ink layer, the first edge routing 122 is NT-TL50D low-resistance silver paste, and the glue filling colloid is 8530A/B organic silica gel. The specific tensioning process is as follows: and a common soft-to-hard laminating machine is adopted, the frame laminating area at the outer edge of the vibrating layer 1 is subjected to frame laminating with the frame laminating area at the position corresponding to the non-vibrating layer 2, glue is filled into the glue filling area after lamination, the vibrating layer 1 is subjected to integral heating, shrinkage and tensioning after glue filling, and the glue filled is solidified while heating. Since the heating curing temperature required for 8530A/B silicone gel is 85℃or more and the heating time is more than 30 minutes, in example 1, the heating temperature is 90℃and the heating time is 40 minutes for the first curing, and then the heating temperature is 110℃and the heating time is 10 minutes for the second curing.
Example 2
In this embodiment, the structure of the directional sounding display screen is shown in fig. 3, wherein the gel filler adopts 8530A/B organic silica gel. The specific tensioning process is as follows: tensioning the vibration layer 1 by adopting a tensioning jig, heating the vibration layer 1 at the temperature of 85-90 ℃, keeping the vibration layer 1 in a humidity environment lower than 90% in the heating process, and adjusting the tensioning jig in the heating process to keep the vibration layer 1 in a tensioning state; after the tensioning is stable, the vibration layer 1 and the non-vibration layer 2 are subjected to frame bonding under the same temperature condition, and the bonded finished membrane material is ensured to be in a tight state; and (3) keeping the tension and the same temperature, filling glue into a glue filling area, keeping the tension and the same temperature after filling glue, integrally heating, shrinking and tensioning the vibration layer 1, curing the glue filled with glue while heating, and particularly adopting the curing temperature of 90 ℃ for 40-60 min. Finally, the product is taken out from the tensioning jig, and trimming, functional testing and other processes are performed.
Example 3
In this embodiment, the structure of the directional sounding display screen is shown in fig. 3, wherein the glue filling colloid is UV glue. The specific tensioning process is as follows: tensioning the vibration layer 1 by adopting a tensioning jig, keeping the vibration layer 1 in a tensioning state, attaching the vibration layer 1 to the non-vibration layer 2 in a frame manner, and ensuring that the attached finished membrane material is in a tensioning state; and (5) filling UV glue in the glue filling area after the tension is maintained, and carrying out light curing on the UV glue after the glue filling. Finally, the product is taken out from the tensioning jig, and trimming, functional testing and other processes are performed.
The invention has the advantages that 1, the polarizer of the display screen is used as a core layer of the vibration layer, the light-emitting layer of the display screen is used as a non-vibration layer, the combination of the existing display screen and the directional sound-emitting screen is realized, and the vibration layer and the non-vibration layer are firstly fixed by glue filling and then are heated and tensioned, or the vibration layer is clamped through a clamp in the whole process and then fixed by glue filling, and the clamping is carried out, and meanwhile, the heating and tensioning or the direct illumination curing are carried out, so that the tension degree and the flatness of the vibration layer of the display screen are ensured, and the sound-emitting efficiency of the whole directional sound-emitting display screen is ensured. 2. According to the invention, through different glue filling colloid, different polaroid structures and the like and different tensioning processes, the optimal tension and flatness of the vibration layer are maintained in the frame attaching process.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (9)

1. A vibrating layer tensioning process for a directional sounding display screen, the process comprising:
s0, tensioning the vibration layer by adopting a tensioning jig, and simultaneously heating the vibration layer at the temperature of 80-110 ℃, wherein the vibration layer is kept in a tensioning state in the heating process;
s1, performing frame bonding on a frame bonding area at the outer edge of a vibration layer and a frame bonding area at a position corresponding to a non-vibration layer, wherein a glue filling area is formed between the outer side of the frame bonding area and the edge of a display screen after bonding;
s2, filling glue into the glue filling area, carrying out integral heating, shrinkage and tensioning on the vibration layer after glue filling, and curing glue filled with glue while heating, wherein the heating temperature is higher than the curing temperature of the glue, and the heating time is longer than the curing time of the glue;
in S1, the same heating temperature as that in S0 is kept for frame bonding; the glue filling and the heat shrinkage tensioning are carried out in S2 by keeping the same heating temperature as in S0.
2. The process for tensioning a vibration layer of an oriented sound display screen according to claim 1, wherein the vibration layer comprises a polarizer, the polarizer comprises a first TAC film, a PVA film and a second TAC film, or any one of a PMMA film, a PC film and a COP film is used to replace the first TAC film and/or the second TAC film.
3. The process for tensioning a vibrating layer of a directional sounding display screen of claim 2, wherein the vibrating layer further comprises a first electrode, the first electrode comprises a first conductive layer and a first edge wire, the first conductive layer is arranged on one face of the polarizer close to the non-vibrating layer, and the first edge wire is arranged on the outer edge of one face of the first conductive layer close to the non-vibrating layer.
4. A process for tensioning a vibrating layer of a directional sounding display screen as claimed in claim 3, wherein a first waterproof layer is arranged on an outer surface of the polarizer, which is far away from the non-vibrating layer, or a second waterproof layer covering the whole first conductive layer or a first frame waterproof layer covering only the first edge routing is arranged on a surface of the first conductive layer, which is close to the non-vibrating layer, or a first waterproof layer and a second waterproof layer/first frame waterproof layer are respectively arranged on the polarizer and the first conductive layer.
5. The process for tensioning a vibration layer of a directional sounding display screen according to claim 4, wherein when a first waterproof layer and a second waterproof layer are respectively arranged on the polarizer and the first conductive layer, the first waterproof layer and the second waterproof layer are formed by silk-screen processing, and the first waterproof layer and the second waterproof layer are formed by transparent insulating ink layers, at the moment, the heating temperature of S2 is 80-110 ℃, and the heating time is not less than 30min.
6. The process for tensioning the vibration layer of the directional sounding display screen according to claim 5, wherein in the step S2, when the transparent insulating ink layer is adopted as the colloid, the first curing is performed at the heating temperature of 90-100 ℃ for 40-50 min, and then the second curing is performed at the heating temperature of 110-120 ℃ for 10-20 min; or the heating temperature is 90-100 ℃ and the heating time is 40-60 min for curing.
7. The process for tensioning a vibration layer of a directional sounding display screen as claimed in claim 4, wherein when a first waterproof layer and a second waterproof layer are respectively arranged on the polarizer and the first conductive layer, the first waterproof layer and the second waterproof layer are formed by silk-screen processing, and the colloid is made of organic silica gel, at this time, the heating temperature of the S2 is more than 85 ℃, and the heating time is not less than 30min.
8. The process for tensioning a vibration layer of a directional sounding display screen as claimed in claim 5 or 7, wherein the silk-screen thickness of the first waterproof layer and the second waterproof layer is less than 2 um.
9. The process of claim 1, wherein in S0, the vibration layer is maintained in a humidity environment of less than 90% during heating.
CN202210469615.3A 2022-04-28 2022-04-28 Vibrating layer tensioning process of directional sounding display screen Active CN114937428B (en)

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