CN116782082A - Directional sounding device and manufacturing process thereof - Google Patents
Directional sounding device and manufacturing process thereof Download PDFInfo
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- CN116782082A CN116782082A CN202311068858.7A CN202311068858A CN116782082A CN 116782082 A CN116782082 A CN 116782082A CN 202311068858 A CN202311068858 A CN 202311068858A CN 116782082 A CN116782082 A CN 116782082A
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- 238000007639 printing Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 9
- 238000011161 development Methods 0.000 claims description 4
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- 239000011521 glass Substances 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/323—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for loudspeakers
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- 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
- H04R31/006—Interconnection of transducer parts
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
- H04R2231/003—Manufacturing aspects of the outer suspension of loudspeaker or microphone diaphragms or of their connecting aspects to said diaphragms
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Manufacturing & Machinery (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention discloses a directional sounding device and a manufacturing process thereof, wherein the device comprises a substrate layer, a plurality of supporting structures and a vibrating layer, the supporting structures are positioned between the substrate layer and the vibrating layer, so that an air gap required by the vibration of the vibrating layer is formed between the substrate layer and the vibrating layer, the upper end and the lower end of the supporting structures are respectively fixed with the vibrating layer and the substrate layer, the supporting structures and the vibrating layer are combined to form a plurality of vibrating units, the vibrating layer of each vibrating unit vibrates under the action of loaded alternating voltage to emit ultrasonic waves, and the ultrasonic waves self-demodulate in the air to form audible sound. The invention reduces the sound distortion and the driving power of the whole directional sound production device.
Description
Technical Field
The invention relates to the technical field of directional loudspeakers, in particular to a directional sound generating device and a manufacturing process thereof.
Background
At present, with the development of ultrathin electronic equipment such as mobile phones and computers, the traditional loudspeaker limits the further reduction of the volume of the electronic equipment due to the large volume of the traditional loudspeaker, and the screen sounding device can sound through the vibration of the screen, so that the further miniaturization of the electronic equipment is facilitated. The screen directional sounding device can further spread sound emitted by the screen towards a specific area, so that the privacy of a user of the electronic equipment is protected, and the sound is prevented from interfering with other people.
The screen directional sounding device comprises a vibrating layer, a supporting structure and a substrate layer, wherein the vibrating layer and the substrate layer are mutually attached, the supporting structure is supported between the vibrating layer and the substrate layer, at least one electrode layer is arranged on the vibrating layer and the substrate layer and is connected with an external driving circuit, the external circuit is used for supplying power, voltage signals are applied to the substrate layer and the vibrating layer, the vibrating layer is driven to vibrate up and down to send out ultrasonic signals, and the ultrasonic signals are self-demodulated through air to give out audible sound.
After the existing vibrating layer is attached to the substrate layer, the end part of the supporting structure is not fixed to the vibrating layer or the substrate layer, in the process that the vibrating layer vibrates upwards, the vibrating layer is separated from the supporting structure or the supporting structure is separated from the substrate layer, the vibration distance formed by separation is an ineffective vibration distance, the ineffective vibration distance can cause the distortion degree of sound emitted by the whole directional sounding device to be increased, and the driving power of the device is increased.
Therefore, the problems of high sound distortion degree, high power and the like of the conventional directional sound production device need to be solved.
Disclosure of Invention
The invention aims to provide a directional sounding device which eliminates invalid vibration distance and reduces sound distortion and power and a manufacturing process thereof.
In order to achieve the above object, in one aspect, the present invention provides a directional sound generating apparatus, the apparatus includes a substrate layer, a plurality of support structures and a vibration layer, the support structures are located between the substrate layer and the vibration layer, so that an air gap required for the vibration of the vibration layer is formed between the substrate layer and the vibration layer, one end of each support structure is formed on a surface of the substrate layer close to the vibration layer, and the other end of each support structure is fixed to a surface of the vibration layer close to the substrate layer, or one end of each support structure is formed on a surface of the vibration layer close to the substrate layer, and the other end of each support structure is fixed to a surface of the substrate layer close to the vibration layer; the base material layer, the supporting structure and the vibration layer are combined to form a plurality of vibration units, the vibration layer of each vibration unit vibrates under the action of loaded alternating voltage to emit ultrasonic waves, and the ultrasonic waves are self-demodulated in air to form audible sound.
In a preferred embodiment, the device further comprises fixing points, one for each of the support structures, by means of which the support structure is fixed to the surface of the substrate layer or the surface of the vibration layer.
In a preferred embodiment, one end of the supporting structure is formed on the surface of the base material layer close to the vibration layer, and when the other end of the supporting structure is fixed with the surface of the vibration layer close to the base material layer, the fixed point is formed on the end of the supporting structure fixed with the surface of the vibration layer or on the surface of the vibration layer close to the base material layer; one end of the supporting structure is formed on the surface of the vibration layer, which is close to the base material layer, and when the other end of the supporting structure is fixed with the surface of the base material layer, which is close to the vibration layer, the fixed point is formed on the end part of the supporting structure, which is fixed with the surface of the base material layer, or on the surface of the base material layer, which is close to the vibration layer.
In a preferred embodiment, the device further comprises a fixing layer between the substrate layer and the vibration layer, the support structure being fixed to the surface of the substrate layer or the surface of the vibration layer by the fixing layer.
In a preferred embodiment, one end of the supporting structure is formed on the surface of the base material layer close to the vibration layer, and when the other end is fixed with the surface of the vibration layer close to the base material layer, the whole fixing layer is formed on the surface of the vibration layer close to the base material layer; one end of the supporting structure is formed on the surface of the vibration layer, which is close to the base material layer, and when the other end of the supporting structure is fixed with the surface of the base material layer, which is close to the vibration layer, the whole surface of the fixing layer is formed on the surface of the base material layer, which is close to the vibration layer.
In a preferred embodiment, the end of the support structure is inserted into the fixed layer to be in contact with the surface of the base material layer or the surface of the vibration layer.
In another aspect, the present invention provides a process for manufacturing a directional sound generating device, where the process adopts a first process or a second process, and the first process includes:
s1, manufacturing a supporting structure on the surface of a substrate layer, which is close to a vibration layer;
s2, the base material layer and the vibration layer are bonded in a frame mode, and the supporting structure and the surface, close to the base material layer, of the vibration layer are fixed while bonded;
the second process comprises the following steps:
s11, manufacturing a supporting structure on the surface of the vibration layer, which is close to the substrate layer;
s21, the base material layer and the vibration layer are bonded together to form a frame, and the supporting structure and the surface, close to the vibration layer, of the base material layer are fixed while being bonded.
In a preferred embodiment, the first process comprises:
s1a, forming the supporting structures on a substrate layer, and then manufacturing fixed points on the end part of each supporting structure fixed with the surface of the vibration layer;
s2a, adhering the base material layer and the vibration layer to form a frame, and fixing the support structure and the surface, close to the base material layer, of the vibration layer through the fixing points while adhering;
or the first process comprises:
s1b, forming the supporting structures on the substrate layer, and manufacturing fixed points on the surface of the vibration layer, which is close to the substrate layer, wherein each supporting structure corresponds to one fixed point;
s2b, adhering the base material layer and the vibration layer to form a frame, and fixing the support structure and the surface, close to the base material layer, of the vibration layer through the fixing points while adhering;
or the first process comprises:
s1c, forming the supporting structure on the substrate layer, and manufacturing a fixing layer on the whole surface of the vibration layer, which is close to the substrate layer;
s2c, the base material layer and the vibration layer are bonded in a frame mode, and the supporting structure is fixed to the surface, close to the base material layer, of the vibration layer through the fixing layer while the base material layer and the vibration layer are bonded.
In a preferred embodiment, the second process comprises:
s11a, forming the supporting structures on the vibration layer, and then manufacturing fixed points on the end part of each supporting structure fixed with the surface of the substrate layer;
s21a, adhering the base material layer and the vibration layer to form a frame, and fixing the support structure to the surface, close to the vibration layer, of the base material layer through the fixing point while adhering;
or the second process comprises:
s11b, forming the supporting structures on the vibration layer, and manufacturing fixed points on the surface of the substrate layer, which is close to the vibration layer, wherein each supporting structure corresponds to one fixed point;
s21b, adhering the base material layer and the vibration layer to form a frame, and fixing the support structure to the surface, close to the vibration layer, of the base material layer through the fixing point while adhering;
or the second process comprises:
s11c, forming the supporting structure on the vibration layer, and manufacturing a fixing layer on the whole surface of the substrate layer, which is close to the vibration layer;
s21c, the base material layer and the vibration layer are bonded in a frame mode, and the supporting structure is fixed to the surface, close to the vibration layer, of the base material layer through the fixing layer while the base material layer and the vibration layer are bonded.
In a preferred embodiment, the fixing point or the fixing layer is realized by any one of silk screen printing, exposure and development, transfer printing, rotary spraying, UV printing, stereoscopic spraying and character spraying, and the substrate layer is attached to the vibration layer before the fixing point or the fixing layer is not cured.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the upper end and the lower end of the supporting structure are respectively fixed with the vibrating layer and the base material layer while the base material layer and the vibrating layer are bonded, so that after the base material layer and the vibrating layer are bonded, stable vibrating units can be formed, and the vibrating layer cannot be separated from the supporting structure when vibrating up and down, thereby eliminating the invalid vibrating distance of the vibrating layer, reducing the sound distortion of the whole directional sounding device and reducing the driving power of the whole directional sounding device.
Drawings
FIG. 1 is a schematic diagram of a directional sound device of the present invention;
FIG. 2 is a schematic structural diagram of a directional sound generating apparatus according to embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of a directional sound emitting device according to embodiment 2 of the present invention;
FIG. 4 is a schematic structural diagram of a directional sound generating apparatus according to embodiment 3 of the present invention;
FIG. 5 is a schematic structural diagram of a directional sound generating apparatus according to embodiment 4 of the present invention;
FIG. 6 is a schematic structural diagram of a directional sound generating apparatus according to embodiment 5 of the present invention;
FIG. 7 is a schematic structural diagram of a directional sound generating apparatus according to embodiment 6 of the present invention;
FIG. 8 is a schematic diagram of a vibrating layer of a conventional directional sound device disengaged from a support structure during vibration;
FIG. 9 is a schematic view of the structure of the directional sound device of the present invention in which the vibrating layer is fixed to the support structure during vibration;
FIG. 10 is a graphical representation of the displacement of the vibration layer over time of the present invention and prior art when excited with a sinusoidal voltage having a frequency of 100 kHz;
FIG. 11 is a schematic flow chart of a first process of the manufacturing process of the directional sound device of the present invention;
fig. 12 is a schematic flow chart of a second process of the manufacturing process of the directional sound generating device of the present invention.
The reference numerals are:
1. the base material layer, 11, the base layer, 12, the first conducting layer, 13, the lower edge routing layer, 14, the lower insulating layer, 2, the supporting structure, 3, the vibration layer, 31, the vibration base layer, 32, the second conducting layer, 33, the upper edge routing layer, 34, the upper insulating layer, 4, the air gap, 5, the fixed point, 6 and the fixed layer.
Detailed Description
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.
Referring to fig. 1 to 7, the directional sounding apparatus disclosed by the invention comprises a substrate layer 1, a plurality of support structures 2 and a vibration layer 3, wherein the support structures 2 are located between the substrate layer 1 and the vibration layer 3 and are used for providing an air gap 4 required by up-and-down vibration of the vibration layer 3. In practice, the support structure 2 may be formed on the surface of the substrate layer 1 close to the vibration layer 3, or may be formed on the surface of the vibration layer 3 close to the substrate layer 1, preferably formed on the substrate layer 1, so as to facilitate processing.
In implementation, the substrate layer 1 may specifically include a base layer 11, a first conductive layer 12, a lower edge routing layer 13 and a lower insulating layer 14, where the base layer 11 is preferably made of a transparent material, and may be made of a glass material, and the first conductive layer 12 is formed on a surface of the base layer 11 near the vibration layer 3, and in implementation, a metal conductive layer is preferably used, for example, any one of nano silver, METAL MESH (metal grid), graphene, carbon nanotube, ITO (indium tin oxide) conductive layer and the like may be selected, where the lower the sheet resistance is, the better the higher the efficiency is; the lower edge routing layer 13 is formed on the edge of the surface of the first conductive layer 12 near the vibration layer 3, and may be implemented by using conductive silver paste to enhance the conductivity of the first conductive layer 12, and may be omitted if the conductivity of the first conductive layer 12 is sufficient. The lower insulating layer 14 is formed on the surface of the first conductive layer 12 near the vibration layer 3 and covers the lower edge routing layer 13, and when the lower insulating layer 14 is implemented, insulating ink may be used. Of course, the specific structure of the substrate layer 1 is not limited in the present invention, and the substrate layer 1 may be provided with the necessary base layer 11 and first conductive layer 12, and the other structures and materials of the base layer 11 and first conductive layer 12 are not limited herein, and the present invention is applicable to other base layers 11 and first conductive layers 12 that can provide supporting function.
In implementation, the vibration layer 3 may specifically include a vibration base layer 31, a second conductive layer 32, an upper edge routing layer 33, and an upper insulating layer 34, where the vibration base layer 31 may be implemented by using any one of PET (polyethylene terephthalate), CPI (transparent polyimide), COP (epoxy-polypropylene copolymer), UTG (ultra-thin flexible glass cover plate), and the like, and the second conductive layer 32 is formed on the surface of the vibration base layer 31 near the substrate layer 1, and in implementation, it is also preferable to use a metal conductive layer, such as nano silver, METAL MESH (metal grid), graphene, carbon nanotube, ITO (indium tin oxide) conductive layer, and the like, where the lower the square resistance is, the better the higher the efficiency is; the upper edge routing layer 33 is formed on the edge of the surface of the second conductive layer 32 near the substrate layer 1, and may be implemented by using conductive silver paste to enhance the conductivity of the second conductive layer 32, and may be omitted if the conductivity of the second conductive layer 32 is sufficient. The upper insulating layer 34 is formed on the surface of the second conductive layer 32 near the substrate layer 1 and covers the upper edge routing layer 33, and when the upper insulating layer 34 is implemented, insulating ink may be used. Of course, the specific structure of the vibration layer 3 is not limited in the present invention, and the vibration layer 31 and the second conductive layer 32 are not limited in any way, and the structure and the material of the vibration layer 31 and the second conductive layer 32 are not limited in any way, and the present invention is applicable to other vibration layers 31 and second conductive layers 32 that can provide vibration. In practice, only one insulating layer may be provided between the base material layer 1 and the vibration layer 3, and the position of the insulating layer is not limited, so long as the first conductive layer 12 of the base material layer 1 and the second conductive layer 32 of the vibration layer 3 can be insulated and isolated. The thickness of the vibration layer 3 may be 20um to 250um, such as 25um, 50um, 75um, 100um, 125um, 150um, 188 um.
The support structure 2 is disposed between the base material layer 1 and the vibration layer 3, and may be formed at one end on a surface of the lower insulating layer 14 of the base material layer 1 near the vibration layer 3, or may be formed at one end on a surface of the upper insulating layer 34 of the vibration layer 3 near the base material layer 1, when implemented. Preferably on the lower insulating layer 14. In practice, the support structure 2 may be made of insulating ink. In addition, in the implementation, the supporting structure 2 may be an insulating bump, and after the vibrating layer 3 and the base material layer 1 are attached to each other, an air gap 4 for the vibrating layer 3 to vibrate up and down is formed between the two due to the existence of the supporting structure 2. After the bonding, the vibration layer 3, the plurality of support structures 2 and the substrate layer 1 form a plurality of vibration units, and the vibration units are preferably arranged according to an array to form the parametric array loudspeaker.
The directional sound generating device is preferably an electrostatic ultrasonic loudspeaker, and the principle is briefly described that direct-current bias voltage is firstly loaded on a first conductive layer 12 of a base material layer 1 and a second conductive layer 32 of a vibration layer 3 to enable the vibration layer 3 to bend and adsorb towards the direction close to the base material layer 1, then alternating-current voltage is loaded on the two conductive layers, the vibration layer 3 vibrates up and down under the action of the alternating-current voltage to generate ultrasonic waves, and the ultrasonic waves self-demodulate in air to form audible sound.
In the prior art, after the vibration layer 3 and the base material layer 1 are manufactured, the vibration layer 3 and the base material layer 1 are directly bonded in a frame, and after the vibration layer 3 and the base material layer 1 are bonded in a frame, the prior support structure 2 is not fixed with the lower insulating layer 14 of the base material layer 1 or the upper insulating layer 34 of the vibration layer 3. As shown in fig. 8, when the conventional directional sound emitting device works, each vibration unit is separated from the base material layer 1 or the vibration layer 3 during vibration, because the rebound force of the vibration layer 3 is larger than the downward electrostatic force, so that the whole vibration layer 3 can separate from the base material layer 1 to do the ineffective vibration with the upward vibration distance of B, if the total vertical vibration distance of the vibration layer 3 is assumed to be a, the effective vibration distance of the vibration layer 3 is a-B, the ineffective vibration can cause the distortion degree of the sound emitted by the directional sound emitting device to be increased, and the power of the device to be increased.
Preferably, as shown in connection with fig. 9, the present invention secures the support structure 2 to the vibration layer 3 or the substrate layer 1. Specifically, if the support structure 2 is formed on the lower insulating layer 14 of the base material layer 1, one end thereof in contact with the upper insulating layer 34 of the vibration layer 3 is fixed to the upper insulating layer 34; if the support structure 2 is formed on the upper insulating layer 34 of the vibration layer 3, one end of the support structure 2 contacting the lower insulating layer 14 of the substrate layer 1 is fixed to the lower insulating layer 14, that is, the upper and lower ends of the support structure 2 are respectively fixed to the vibration layer 3 and the substrate layer 1, so that stable vibration units are formed among the substrate layer 1, the support structure 2 and the vibration layer 3. In practice, the support structure 2 may be affixed to the vibration layer 3 or the substrate layer 1 by a variety of structures or processes. In a specific embodiment, the support structure 2 may be fixed to the surface of the substrate layer 1 or the surface of the vibration layer 3 by fixing points 5. If a fastening point 5 can be formed on the end of each support structure 2, by means of which fastening point 5 the support structure 2 is fastened to the lower insulation layer 14 of the base layer 1 or to the upper insulation layer 34 of the vibration layer 3, of course, in other alternative embodiments, if fastening points 5 can be provided on the lower insulation layer 14 of the base layer 1 or on the upper insulation layer 34 of the vibration layer 3, as long as each support structure 2 corresponds to a fastening point 5. In another embodiment, the support structure 2 may also be fixed to the surface of the substrate layer 1 or the surface of the vibration layer 3 by a fixing layer 6. For example, an insulating fixing layer 6 can be formed on the lower insulating layer 14 of the base material layer 1 or the upper insulating layer 34 of the vibration layer 3, and the support structure 2 is fixed with the lower insulating layer 14 of the base material layer 1 or the upper insulating layer 34 of the vibration layer 3 through the fixing layer 6. In implementation, the supporting structure 2, the fixing point 5 and the fixing layer 6 can be all realized by adopting insulating ink, and can be formed by adopting any one of the processes of silk screen printing, exposure development, transfer printing, rotary spraying, UV printing, three-dimensional spraying, character spraying and the like.
In one embodiment: the fixing point 5 and the fixing layer 6 are generally made of silk-screen printing ink, the process curing condition is preferably lower than the curing ink with the temperature of 100 degrees, or the UV curing is preferably made of the ink with the energy of lower than 3000MJ, the curing condition is suitable for a module combining the directional sounding device and the screen, namely the module is integrated into a screen, under the curing condition, the display or touch effect of the module integrated into the screen can be ensured, and the problem that the display or touch performance is reduced to a certain extent due to yellowing and ageing of the module can be avoided. Of course, if the directional sounding device of the invention is independently used, the curing material with higher temperature (such as the temperature above 200 ℃) or higher energy can be selected, so that the overall reliability of the directional sounding device can be improved.
In addition, the fixing point 5 and the fixing layer 6 are preferably made of dielectric materials with small number of polar groups, high molecular weight and high crystallinity so as to achieve high stability state and insulation effect of the system. And the better the optical properties of the fixing point 5 and the fixing layer 6, the better the visualization effect: materials with a transmittance of greater than 90% are preferred.
The structure of the directional sound emitting apparatus of the present invention will be described in several specific embodiments.
Example 1
As shown in fig. 2, the directional sound generating device disclosed in embodiment 1 of the present invention includes a base material layer 1, a supporting structure 2, a fixing point 5 and a vibration layer 3, wherein specific structures of the base material layer 1 and the vibration layer 3 can be referred to the above description, and details thereof are omitted herein.
The support structure 2 of this embodiment 1 is printed on the lower insulating layer 14 of the substrate layer 1, and the support structure 2 is cured after printing, preferably by UV curing. After the supporting structure 2 is solidified, a fixed point 5 is formed at the end part of the supporting structure 2, and the fixing point can be realized by adopting a printing technology, preferably a high-precision screen printer, so that the supporting structure 2 and the fixed point 5 are accurately aligned. After the fixed point 5 is printed, aligning the base material layer 1 with the vibration layer 3 and attaching the frame, and then electrifying and loading direct-current bias voltage between the first conductive layer 12 of the base material layer 1 and the second conductive layer 32 of the vibration layer 3 to enable the vibration layer 3 to be adsorbed downwards, so that the tail end of the supporting structure 2 is contacted with the upper insulating layer 34 of the vibration layer 3 and fixed through the fixed point 5; the fixing point 5 is then cured, preferably also by UV curing, after which the shape of the fixing point 5 is fixed. That is, when the fixing point 5 is not cured and fixed, the end of the support structure 2 is fixed in contact with the upper insulating layer 34 of the vibration layer 3 through the fixing point 5, and then the fixing point 5 is cured and fixed. Before the fixed point 5 is solidified and shaped, the supporting structure 2 is contacted with the upper insulating layer 34 of the vibrating layer 3, and after the vibrating layer 3 is electrified and adsorbed downwards, the fixed point 5 is pressed down to be basically flush with the upper end part of the supporting structure 2, so that the influence on the thickness of the whole sound generating device is almost negligible.
Example 2
As shown in fig. 3, the directional sound generating device disclosed in embodiment 2 of the present invention includes a base material layer 1, a supporting structure 2, a fixing point 5 and a vibration layer 3, wherein specific structures of the base material layer 1 and the vibration layer 3 can be referred to the above description, and details thereof are omitted herein.
Unlike embodiment 1, the fixing points 5 of embodiment 2 are formed on the surface of the upper insulating layer 34 of the vibration layer 3 near the base material layer 1, and each support structure 2 corresponds to a fixing point 5 on one vibration layer 3. That is, after the upper insulating layer 34 of the vibration layer 3 is formed, the fixing point 5 is further processed on the surface of the upper insulating layer 34, and in the processing, the fixing point 5 may be formed on the upper insulating layer 34 of the vibration layer 3 by a printing technique. After the fixed point 5 is printed, the base material layer 1 and the vibration layer 3 are aligned, so that the support structure 2 and the fixed point 5 are ensured to be aligned accurately, and the frame is attached after alignment. Other structures and processing steps are the same as those of embodiment 1, and are not described here.
Example 3
As shown in fig. 4, the directional sound generating device disclosed in embodiment 3 of the present invention includes a base material layer 1, a supporting structure 2, a fixing layer 6 and a vibration layer 3, wherein specific structures of the base material layer 1 and the vibration layer 3 can be referred to the above description, and details thereof are omitted herein.
Unlike example 1, this example employs a fixing layer 6 to fix the support structure 2 to the base material layer 1 or the vibration layer 3. In this embodiment, the fixing layer 6 is formed on the surface of the upper insulating layer 34 of the vibration layer 3, which is close to the substrate layer 1, that is, a layer of fixing layer 6 is formed on the upper insulating layer 34, the fixing layer 6 can be specifically realized by using a silk screen process, after printing, before the fixing layer 6 is not cured yet, the vibration layer 3 and the substrate layer 1 are aligned and attached, and then the fixing layer 6 is subjected to electric adsorption after attaching, and then the fixing layer 6 is cured, wherein how to carry out electric adsorption after attaching can be described in embodiment 1, and details are omitted here. The fixing layer 6 can be cured by heat or UV, preferably UV, and is easy to operate.
Preferably, since the support structure 2 is fixed to the vibration layer 3 by the fixing layer 6 before the curing layer 6 is uncured, the end of the support structure 2 is inserted into the fixing layer 6 to contact the surface of the vibration layer 3 during fixing, so that the effective height of the support structure 2 is reduced after the fixing layer 6 is cured. In order to ensure the height of the support structure 2, the thickness of the fixing layer 6 needs to be considered in combination, and in the manufacturing process, the height of the support structure 2 required to be arranged according to the invention is obtained by specifically adding the height of the existing support structure 2 to the thickness of the fixing layer 6, and in order not to influence the thickness of the whole vibration layer 3, the sum of the thickness of the fixing layer 6 and the thickness of the upper insulating layer 34 according to the invention is equal to the whole thickness of the existing upper insulating layer 34 due to the addition of the fixing layer 6. For example, in the preferred case, for the vibration layer 3 with the thickness of 50um, 100um, 125um, the thickness of the existing upper insulating layer 34 is generally controlled between 11um and 12um, and the height of the supporting structure 2 is between 11um and 12 um. The thickness of the fixing layer 6 is 3-4 um, so the height of the fixing layer is controlled to 7-8 um when the upper insulating layer 34 is manufactured. Since the fixing layer 6 is not yet cured during lamination, the end of the supporting structure 2 is inserted into the fixing layer 6 to contact the surface of the upper insulating layer 34, so that the effective height of the supporting structure 2 is reduced by 3 um-4 um after curing, and the effective height of the supporting structure 2 is controlled to be 14 um-16 um during manufacturing in order to ensure that the effective height of the supporting structure 2 is 11 um-12 um.
Example 4
As shown in fig. 5, the directional sound generating device disclosed in embodiment 4 of the present invention includes a base material layer 1, a supporting structure 2, a fixing point 5 and a vibration layer 3, wherein the specific structures of the base material layer 1 and the vibration layer 3 can be referred to the above description, and the detailed description is omitted herein.
Unlike embodiment 1, the support structure 2 of embodiment 4 is formed on the upper insulating layer 34 of the vibration layer 3, and printing may be used, and the fixing points 5 are correspondingly formed on the end of the support structure 2 near the lower insulating layer 14.
Similarly, the support structure 2 of embodiment 4 is printed on the upper insulating layer 34 of the vibration layer 3, and the support structure 2 is cured after printing, preferably by UV curing. After the supporting structure 2 is solidified, a fixed point 5 is formed at the end part of the supporting structure 2, and the fixing point can be realized by adopting a printing technology, preferably a high-precision screen printer, so that the supporting structure 2 and the fixed point 5 are accurately aligned. After the fixed point 5 is printed, aligning the base material layer 1 with the vibration layer 3 and attaching the frame, and then electrifying and loading direct-current bias voltage between the first conductive layer 12 of the base material layer 1 and the second conductive layer 32 of the vibration layer 3 to enable the vibration layer 3 to be adsorbed downwards, so that the tail end of the supporting structure 2 is contacted with the lower insulating layer 14 of the base material layer 1 and fixed through the fixed point 5; the fixing point 5 is then cured, preferably also by UV curing, after which the shape of the fixing point 5 is fixed. That is, when the fixing points 5 are not cured and fixed, the end of the support structure 2 is fixed in contact with the lower insulating layer 14 of the substrate layer 1 through the fixing points 5, and then the fixing points 5 are cured and fixed. Before the fixed point 5 is solidified and shaped, the supporting structure 2 is contacted with the lower insulating layer 14 of the substrate layer 1, and after the vibrating layer 3 is electrified and adsorbed downwards, the fixed point 5 is pressed down to be basically flush with the end part of the supporting structure 2, so that the influence on the thickness of the whole sound generating device is almost negligible.
Example 5
As shown in fig. 6, the directional sound generating device disclosed in embodiment 5 of the present invention includes a base material layer 1, a supporting structure 2, a fixing point 5 and a vibration layer 3, wherein the specific structures of the base material layer 1 and the vibration layer 3 can be referred to the above description, and the details are not repeated here.
Unlike example 4, the fixing points 5 of this example 5 are formed on the surface of the lower insulating layer 14 of the base material layer 1 near the vibration layer 3, and each support structure 2 corresponds to a fixing point 5 on one base material layer 1. That is, after the lower insulating layer 14 of the base material layer 1 is formed, the fixing point 5 is further processed on the surface of the lower insulating layer 14, and in the processing, the fixing point 5 may be formed on the lower insulating layer 14 of the base material layer 1 by a printing technique. After the fixed point 5 is printed, the base material layer 1 and the vibration layer 3 are aligned, so that the support structure 2 and the fixed point 5 are ensured to be aligned accurately, and the frame is attached after alignment. Other structures and processing steps are the same as those of embodiment 4, and will not be described here again.
Example 6
As shown in fig. 7, the directional sound generating device disclosed in embodiment 6 of the present invention includes a base material layer 1, a supporting structure 2, a fixing layer 6 and a vibration layer 3, wherein specific structures of the base material layer 1 and the vibration layer 3 can be referred to the above description, and details thereof are omitted herein.
Unlike example 4, this example employs a fixing layer 6 to fix the support structure 2 to the base material layer 1 or the vibration layer 3. In this embodiment, the fixing layer 6 is formed on the surface of the lower insulating layer 14 of the substrate layer 1, which is close to the vibration layer 3, that is, a layer of fixing layer 6 is formed on the lower insulating layer 14, the fixing layer 6 may be specifically realized by using a silk screen process, after printing, before the fixing layer 6 is not cured yet, the vibration layer 3 and the substrate layer 1 are aligned and attached, and then the fixing layer 6 is subjected to electric adsorption after attaching, and then the fixing layer 6 is cured, wherein how to carry out electric adsorption after attaching can be described in embodiment 4, which is not repeated herein. The fixing layer 6 can be cured by heat or UV, preferably UV, and is easy to operate.
Preferably, since the support structure 2 is fixed to the substrate layer 1 by the fixing layer 6 before the curing layer 6 is cured, the end of the support structure 2 is inserted into the fixing layer 6 to contact with the surface of the substrate layer 1 during fixing, so that the effective height of the support structure 2 is reduced after the fixing layer 6 is cured. In order to ensure the height of the support structure 2, the thickness of the fixing layer 6 needs to be considered in combination, and in the manufacturing process, the height of the support structure 2 required to be provided by the invention is obtained by specifically adding the height of the existing support structure 2 to the thickness of the fixing layer 6, and in order not to affect the thickness of the whole substrate layer 1, the sum of the thickness of the fixing layer 6 and the thickness of the lower insulating layer 14 of the invention is equal to the whole thickness of the existing lower insulating layer 14 due to the addition of the fixing layer 6. For example, in the preferred case, for the vibration layer 3 with the thickness of 50um, 100um, 125um, the thickness of the existing lower insulating layer 14 is generally controlled between 11um and 12um, and the height of the supporting structure 2 is between 11um and 12 um. The thickness of the fixing layer 6 is 3-4 um, so the height of the lower insulating layer 14 is controlled to 7-8 um. Since the fixing layer 6 is not yet cured during lamination, the end of the supporting structure 2 is inserted into the fixing layer 6 to contact the surface of the lower insulating layer 14, so that the effective height of the supporting structure 2 is reduced by 3 um-4 um after curing, and the effective height of the supporting structure 2 is controlled to be 14 um-16 um during manufacturing in order to ensure that the effective height of the supporting structure 2 is 11 um-12 um
In the invention, the supporting structure 2 is fixed with the vibrating layer 3 or the base material layer 1, so that after the base material layer 1 is attached with the vibrating layer 3, stable vibrating units can be formed, and the vibrating layer 3 cannot be separated from the supporting structure 2 when vibrating up and down, thereby eliminating the invalid vibrating distance of the vibrating layer 3, reducing the sound distortion of the whole directional sounding device and reducing the driving power of the whole device. As shown in fig. 10, the displacement of the vibration layer 3 varies with time when excited by a sinusoidal voltage having a frequency of 100 kHz. The two cases of fixing the vibration layer 3 and the supporting structure 2 and separating the existing vibration layer 3 and the supporting structure 2 are compared. As can be seen from the figure, when the vibration layer 3 is detached from the support structure 2, the vibration of the vibration layer 3 cannot form a complete sine wave, thereby causing harmonic distortion. On the contrary, the vibration of the vibration layer 3 of the present invention can form a complete sine wave.
In addition, the invention secures the vibration layer 3 and the support structure 2 together such that each vibration unit is independent of the other. When the vibration layer 3 is not fixed with the supporting structure 2 under certain reliability conditions (such as power-on at a high temperature of 75 ℃ and storage at a high temperature of 60 ℃ and a humidity of 90 RH%), the vibration layer 3 is slightly loosened, and the whole surface of the sound generating device is wrinkled and fails. According to the invention, the vibrating layer 3 and the supporting structure 2 are fixed together, when the vibrating layer 3 is slightly loosened, the loosening amount is uniformly distributed on each vibrating unit, and the distributed amount of each vibrating unit is very small, so that wrinkles are not caused.
The invention also discloses a manufacturing process of the directional sound production device, which can be realized by adopting a first process or a second process, wherein as shown in fig. 11, the first process comprises the following steps:
s1, manufacturing a supporting structure 2 on the surface of a base material layer 1 close to a vibration layer 3;
s2, the base material layer 1 and the vibration layer 3 are bonded in a frame mode, and the surface, close to the base material layer 1, of the support structure 2 and the vibration layer 3 is fixed while the base material layer 1 and the vibration layer 3 are bonded.
This process may have three embodiments, and the first process includes:
the method comprises the steps of S1a, forming support structures 2 on a substrate layer 1, and then manufacturing fixed points 5 on the end part of each support structure 2 fixed with the surface of a vibration layer 3;
s2a, the base material layer 1 and the vibration layer 3 are bonded in a frame, and the support structure 2 and the vibration layer 3 are fixed on the surface close to the base material layer 1 through the fixed point 5 while being bonded;
or the first process comprises:
the S1b is characterized in that a supporting structure 2 is formed on the substrate layer 1, fixed points 5 are formed on the surface, close to the substrate layer 1, of the vibration layer 3, and each supporting structure 2 corresponds to one fixed point 5;
s2b, the base material layer 1 and the vibration layer 3 are bonded in a frame, and the support structure 2 and the vibration layer 3 are fixed on the surface close to the base material layer 1 through the fixed point 5 while being bonded;
or the first process comprises:
the S1c is characterized in that a supporting structure 2 is formed on a substrate layer 1, and a fixed layer 6 is formed on the whole surface of the vibration layer 3, which is close to the substrate layer 1;
s2c, make the frame laminating with substrate layer 1 and vibration layer 3, and pass through fixed layer 6 and vibration layer 3 and be close to the surface fixation of substrate layer 1 with bearing structure 2 when laminating.
As shown in fig. 12, the second process includes:
s11, manufacturing and forming a supporting structure 2 on the surface of the vibration layer 3, which is close to the substrate layer 1;
s21, the base material layer 1 and the vibration layer 3 are bonded in a frame mode, and the surface, close to the vibration layer 3, of the base material layer 1 is fixed through the supporting structure 2 while the base material layer 1 is bonded.
Similarly, the process can be implemented in three embodiments, namely:
the second process comprises the following steps:
s11a, forming support structures 2 on the vibration layer 3, and then manufacturing fixed points 5 on the end part of each support structure 2 fixed with the surface of the substrate layer 1;
s21a, the base material layer 1 and the vibration layer 3 are bonded in a frame mode, and the supporting structure 2 is fixed with the surface, close to the vibration layer 3, of the base material layer 1 through the fixing points 5 while being bonded;
or the second process comprises:
s11b, forming a supporting structure 2 on the vibration layer 3, and manufacturing fixed points 5 on the surface of the base material layer 1 close to the vibration layer 3, wherein each supporting structure 2 corresponds to one fixed point 5;
s21b, the base material layer 1 and the vibration layer 3 are bonded in a frame mode, and the supporting structure 2 is fixed with the surface, close to the vibration layer 3, of the base material layer 1 through the fixing points 5 while being bonded;
or the second process comprises:
s11c, forming a supporting structure 2 on the vibration layer 3, and manufacturing a fixing layer 6 on the whole surface of the surface, close to the vibration layer 3, of the base material layer 1;
s21c, the base material layer 1 and the vibration layer 3 are bonded in a frame mode, and the supporting structure 2 is fixed to the surface, close to the vibration layer 3, of the base material layer 1 through the fixing layer 6 while being bonded.
The specific implementation process of each step may refer to the descriptions in embodiments 1 to 6, and will not be described herein.
The invention has the advantages that the support structure 2 and the vibration layer 3 or the base material layer 1 are fixed together while the base material layer 1 and the vibration layer 3 are bonded together, so that after the base material layer 1 and the vibration layer 3 are bonded, stable vibration units can be formed, the vibration layer 3 cannot be separated from the support structure 2 when vibrating up and down, thereby eliminating the invalid vibration distance of the vibration layer 3, reducing the sound distortion of the whole directional sound production device and reducing the driving power of the whole directional sound production device.
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 (10)
1. The directional sounding device is characterized by comprising a substrate layer, a plurality of supporting structures and a vibrating layer, wherein the supporting structures are positioned between the substrate layer and the vibrating layer, so that an air gap required by the vibrating layer to vibrate is formed between the substrate layer and the vibrating layer, one end of each supporting structure is formed on the surface of the substrate layer close to the vibrating layer, the other end of each supporting structure is fixed with the surface of the vibrating layer close to the substrate layer, or one end of each supporting structure is formed on the surface of the vibrating layer close to the substrate layer, and the other end of each supporting structure is fixed with the surface of the substrate layer close to the vibrating layer; the base material layer, the supporting structure and the vibration layer are combined to form a plurality of vibration units, the vibration layer of each vibration unit vibrates under the action of loaded alternating voltage to emit ultrasonic waves, and the ultrasonic waves are self-demodulated in air to form audible sound.
2. The directional sound generating apparatus of claim 1, further comprising a fixation point, one for each of said support structures, said support structures being fixed to a surface of said substrate layer or a surface of said vibration layer by said fixation points.
3. The directional sound generating apparatus of claim 2, wherein one end of the supporting structure is formed on a surface of the base material layer adjacent to the vibration layer, and the other end is fixed to the surface of the vibration layer adjacent to the base material layer, and the fixing point is formed on an end of the supporting structure fixed to the surface of the vibration layer or on the surface of the vibration layer adjacent to the base material layer; one end of the supporting structure is formed on the surface of the vibration layer, which is close to the base material layer, and when the other end of the supporting structure is fixed with the surface of the base material layer, which is close to the vibration layer, the fixed point is formed on the end part of the supporting structure, which is fixed with the surface of the base material layer, or on the surface of the base material layer, which is close to the vibration layer.
4. The directional sound generating apparatus of claim 1, further comprising a securing layer between the substrate layer and the vibration layer, wherein the support structure is secured to a surface of the substrate layer or a surface of the vibration layer by the securing layer.
5. The directional sound generating apparatus of claim 4, wherein one end of the supporting structure is formed on the surface of the base material layer adjacent to the vibration layer, and when the other end is fixed to the surface of the vibration layer adjacent to the base material layer, the whole surface of the fixing layer is formed on the surface of the vibration layer adjacent to the base material layer; one end of the supporting structure is formed on the surface of the vibration layer, which is close to the base material layer, and when the other end of the supporting structure is fixed with the surface of the base material layer, which is close to the vibration layer, the whole surface of the fixing layer is formed on the surface of the base material layer, which is close to the vibration layer.
6. The directional sound generating apparatus of claim 5, wherein the end of the support structure is inserted into the fixed layer in contact with the surface of the substrate layer or the surface of the vibration layer.
7. A process for manufacturing a directional sound generating device according to any one of claims 1 to 6, wherein the process adopts a first process or a second process, and the first process comprises:
s1, manufacturing a supporting structure on the surface of a substrate layer, which is close to a vibration layer;
s2, the base material layer and the vibration layer are bonded in a frame mode, and the supporting structure and the surface, close to the base material layer, of the vibration layer are fixed while bonded;
the second process comprises the following steps:
s11, manufacturing a supporting structure on the surface of the vibration layer, which is close to the substrate layer;
s21, the base material layer and the vibration layer are bonded together to form a frame, and the supporting structure and the surface, close to the vibration layer, of the base material layer are fixed while being bonded.
8. The process for manufacturing a directional sound generating apparatus according to claim 7, wherein said first process comprises:
s1a, forming the supporting structures on a substrate layer, and then manufacturing fixed points on the end part of each supporting structure fixed with the surface of the vibration layer;
s2a, adhering the base material layer and the vibration layer to form a frame, and fixing the support structure and the surface, close to the base material layer, of the vibration layer through the fixing points while adhering;
or the first process comprises:
s1b, forming the supporting structures on the substrate layer, and manufacturing fixed points on the surface of the vibration layer, which is close to the substrate layer, wherein each supporting structure corresponds to one fixed point;
s2b, adhering the base material layer and the vibration layer to form a frame, and fixing the support structure and the surface, close to the base material layer, of the vibration layer through the fixing points while adhering;
or the first process comprises:
s1c, forming the supporting structure on the substrate layer, and manufacturing a fixing layer on the whole surface of the vibration layer, which is close to the substrate layer;
s2c, the base material layer and the vibration layer are bonded in a frame mode, and the supporting structure is fixed to the surface, close to the base material layer, of the vibration layer through the fixing layer while the base material layer and the vibration layer are bonded.
9. The process for manufacturing a directional sound generating apparatus according to claim 7, wherein said second process comprises:
s11a, forming the supporting structures on the vibration layer, and then manufacturing fixed points on the end part of each supporting structure fixed with the surface of the substrate layer;
s21a, adhering the base material layer and the vibration layer to form a frame, and fixing the support structure to the surface, close to the vibration layer, of the base material layer through the fixing point while adhering;
or the second process comprises:
s11b, forming the supporting structures on the vibration layer, and manufacturing fixed points on the surface of the substrate layer, which is close to the vibration layer, wherein each supporting structure corresponds to one fixed point;
s21b, adhering the base material layer and the vibration layer to form a frame, and fixing the support structure to the surface, close to the vibration layer, of the base material layer through the fixing point while adhering;
or the second process comprises:
s11c, forming the supporting structure on the vibration layer, and manufacturing a fixing layer on the whole surface of the substrate layer, which is close to the vibration layer;
s21c, the base material layer and the vibration layer are bonded in a frame mode, and the supporting structure is fixed to the surface, close to the vibration layer, of the base material layer through the fixing layer while the base material layer and the vibration layer are bonded.
10. The process for manufacturing the directional sound generating device according to claim 8 or 9, wherein the fixing point or the fixing layer is realized by any one of silk screen printing, exposure and development, transfer printing, rotary spraying, UV printing, stereoscopic spraying and character spraying, and the substrate layer is attached to the vibration layer before the fixing point or the fixing layer is not cured.
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| CN209314099U (en) * | 2018-11-06 | 2019-08-27 | 深圳康佳电子科技有限公司 | One kind being based on OLED screen curtain sounding device |
| CN113891232A (en) * | 2021-09-28 | 2022-01-04 | 京东方科技集团股份有限公司 | Sound production device, preparation method thereof and display device |
| CN115243155A (en) * | 2022-08-03 | 2022-10-25 | 苏州清听声学科技有限公司 | Directional sound production screen and auxiliary adsorption method of vibration layer of directional sound production screen |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209314099U (en) * | 2018-11-06 | 2019-08-27 | 深圳康佳电子科技有限公司 | One kind being based on OLED screen curtain sounding device |
| CN113891232A (en) * | 2021-09-28 | 2022-01-04 | 京东方科技集团股份有限公司 | Sound production device, preparation method thereof and display device |
| CN115243155A (en) * | 2022-08-03 | 2022-10-25 | 苏州清听声学科技有限公司 | Directional sound production screen and auxiliary adsorption method of vibration layer of directional sound production screen |
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