CN115942219A - Foldable directional sounding device, display device and preparation process - Google Patents
Foldable directional sounding device, display device and preparation process Download PDFInfo
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Abstract
The invention discloses a foldable directional sounding device, a display device and a preparation process, wherein the directional sounding device can be folded while directionally sounding by manufacturing a vibration layer and a back pole plate into the foldable directional sounding device. In addition, the preparation yield of the directional sounding device is improved, the difficulty of the preparation process is reduced and the like through various different new preparation processes, so that the directional sounding device is well combined with a display device.
Description
Technical Field
The invention relates to the technical field of directional sounding of screens, in particular to a foldable directional sounding device, a display device and a preparation process.
Background
With the development of display technology, consumers tend to favor a display device that can integrate the display screen and the playing sound perfectly, not only with the requirements of picture quality and definition, but also with the focus on the output effect of sound.
The existing sound and picture integration of the display device is realized through a screen sound production technology, and the principle is that a vibration original piece is utilized to push a screen to vibrate to produce sound. For example: the resonant screen sounding scheme is that a device with vibration characteristic is attached below a screen or on a middle frame of a whole machine, and the device vibrates during working, so that the screen is driven to vibrate and sound; another example is: the direct-push screen sounding scheme has the advantages that the device is mainly composed of two parts, one part is directly attached to the screen, the other part is fixed to the middle frame, when the device works, the two parts can generate attractive force or repulsive force of interaction, so that the screen is pushed to vibrate and sound, and compared with a resonance screen sounding scheme, the conversion efficiency is improved.
When the display screen on the electronic equipment is the foldable display screen, the area for displaying on the electronic equipment can be increased to a great extent, so that a user has better visual experience. Nowadays, foldable display screens are increasingly applied to various types of terminal devices, and have good application prospects.
That is, the demand for the folding screen in the market is becoming more and more definite. Therefore, how to make the directional ultrasound screen foldable is a problem to be solved at present.
The invention content is as follows:
the invention aims to provide a foldable directional sounding device, a display device and a preparation process.
To achieve the above object, in one aspect, the present invention provides a foldable directional sound generator, comprising:
the vibration layer comprises a first substrate layer and a first conductive layer, the first conductive layer is arranged on one end face of the first substrate layer, and the vibration layer vibrates and produces sound under the action of a loaded electric signal;
the front back polar plate is attached to the frame of the vibration layer, the front back polar plate comprises a second base layer and a second conducting layer, and the second conducting layer is arranged on the end face, far away from the vibration layer, of the second base layer;
the micro-pattern is arranged on the end face, close to the vibration layer, of the second substrate layer, is positioned between the first conducting layer and the second substrate layer after the vibration layer is attached to the frame of the front back polar plate, and is used for providing an air gap required by vibration of the vibration layer;
the first substrate layer and the second substrate layer are both folded films.
In a preferred embodiment, the vibration layer further comprises: the first edge routing is arranged at the edge of the end face, close to the front back polar plate, of the first conductive layer, and the second edge insulating layer is arranged on the first edge routing and covers the first edge routing;
the front back plate further comprises: the second edge routing wire is arranged on the edge, away from the end face of the second basal layer, of the second conducting layer, and the second edge insulating layer is arranged on the second edge routing wire and covers the first edge routing wire.
In a preferred embodiment, the first and second substrate layers are each a foldable transparent polyimide layer.
On the other hand, the invention provides a foldable display device, which comprises a directional sounding device and a display layer, wherein the directional sounding device is the foldable directional sounding device, and is directly attached to the display layer, or the directional sounding device and the display layer are integrated into a whole.
In a preferred embodiment, the display layer comprises a protective layer, a polarizer, a foldable array and an under-screen support layer which are sequentially stacked from top to bottom, and the protective layer is adhered to the second conductive layer of the front back plate.
In a preferred embodiment, the protective layer is a single protective layer or a multi-layer composite protective layer, the single protective layer is any one of the UTG ultra-thin glass, the PET and the CPI film, and the multi-layer composite protective layer is a combination of any two or three of the UTG ultra-thin glass, the PET and the CPI film.
In a preferred embodiment, the display device has a bending angle region formed by folding, and the bending angle region is not provided with edge traces.
In another aspect, the present invention provides a process for manufacturing a foldable directional sound generator, comprising:
s1, preparing a vibration layer, and binding a flexible circuit board on the vibration layer;
s2, preparing a front back plate, making the micro-pattern on the surface of the front back plate, and binding a flexible circuit board on the front back plate;
and S3, performing frame fitting on the vibration layer and the front back polar plate.
In a preferred embodiment, the S1 includes:
s11, coating the stock solution of the first substrate layer on carrier glass, and solidifying the stock solution of the first substrate layer to form the first substrate layer;
s12, plating the first conducting layer on the cured first base layer;
s13, making a first edge routing on the edge of the first conductive layer, and making a first edge insulating layer covering the first edge routing on the first edge routing;
s14, binding a flexible circuit board on the first substrate layer, and then peeling off the carrier glass to form the vibration layer.
In a preferred embodiment, the S2 includes:
s21, coating the stock solution of the second substrate layer on carrier glass, and solidifying the stock solution of the second substrate layer to form the second substrate layer;
s22, plating the second conducting layer on the cured second base layer;
s23, forming a second edge wire on the edge of the second conducting layer, and forming a second edge insulating layer covering the second edge wire on the second edge conducting layer;
s24, attaching carrier glass to the end face, away from the second substrate layer, of the second conducting layer, and then stripping the carrier glass on the second substrate layer;
and S25, making the micro-pattern on the end face, far away from the second conducting layer, of the second substrate layer, binding the flexible circuit board on the second substrate layer, and stripping off the carrier glass on the second conducting layer to form the front back electrode plate.
In a preferred embodiment, the S3 includes:
s31, using carrier glass to be attached to the first substrate layer of the vibration layer;
s32, tensioning the front back plate by using tensioning equipment;
and S33, attaching the vibration layer adhered with the carrier glass in the step 31 to the frame of the front back plate tensioned in the step 32.
In another aspect, the present invention further discloses a manufacturing process of a foldable display device, including:
preparing a foldable directional sounding device, wherein the directional sounding device is prepared by the preparation process of the foldable directional sounding device in the claim;
and B, directly attaching the directional sounding device to the display layer, or integrally integrating the directional sounding device and the display layer.
Compared with the prior art, the invention has the following beneficial effects:
1. the directional sounding device is foldable, can be combined with various interfaces, such as planes, curved surfaces and the like, and can be applied to various application occasions.
2. The directional sounding device is combined with the foldable display layer, so that the display screen can be folded and can also generate sound directionally.
3. When the vibrating layer and the front back plate are prepared, a new process is adopted, particularly the carrier glass is adopted, the CPI can be in an optical grade, and the prepared product has high yield and low cost.
Description of the drawings:
FIG. 1 is a schematic view of the overall structure of the directional sound generating device of the present invention;
FIG. 2 is a schematic diagram of the overall structure of a directional sound generator according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating an overall structure of a display device according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a vibrating layer with carrier glass attached thereto in accordance with one embodiment of the present invention;
FIG. 5 is a schematic flow chart of a manufacturing process of the directional sound generating device of the present invention;
FIG. 6 is a schematic flow chart illustrating fabrication of a vibration layer in one embodiment;
FIG. 7 is a schematic flow chart illustrating the preparation of a front back plate in one embodiment;
FIG. 8 is a schematic flow chart of a back plate and vibration layer frame attachment in an embodiment;
FIG. 9a is a schematic view of a display device according to an embodiment of the present disclosure;
fig. 9b is a schematic view of a display device according to an embodiment of the present disclosure folded outward.
The reference signs are:
10. directional sound production device, 20, display device, 1, vibration layer, 11, first basal layer, 12, first conducting layer, 13, first edge routing, 14, first edge insulating layer, 2, micro-pattern, 3, front back plate, 31, second basal layer, 32, second conducting layer, 33, second edge routing, 34, second edge insulating layer, 4, carrier glass, 5, display layer, 51, protective layer, 52, polarizer, 53, foldable array, 54, under-screen supporting layer, 21, bending angle area.
The specific implementation mode is as follows:
the following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations such as "comprises" or "comprising", etc., will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
The invention discloses a foldable directional sounding device, a display device and a preparation process, wherein the directional sounding device can be folded while directionally sounding by manufacturing a vibration layer and a front back polar plate into the foldable directional sounding device. In addition, the preparation yield of the directional sounding device is improved, the difficulty of the preparation process is reduced and the like through various different new preparation processes, so that the directional sounding device is well combined with a display device.
As shown in fig. 1, a foldable directional sound generator 10 according to an embodiment of the present invention includes a vibration layer 1, a micro pattern 2, and a front back plate 3, wherein the vibration layer 1 is attached to the front back plate 3, and the micro pattern 2 is located between the vibration layer 1 and the front back plate 3 for providing an air gap required by the vibration layer 1. The vibration layer 1, the micro-pattern 2 and the front back plate 3 are combined to form an electrostatic ultrasonic transducer. The electrostatic ultrasonic transducer emits ultrasonic signals modulated by audio signals, and audible sound is self-demodulated by air, so that directional sound production is realized. Preferably, both the vibration layer 1 and the front backplate 3 are foldable, thereby achieving foldability of the entire directional sound emission device.
Specifically, as shown in fig. 2 to 4, the vibration layer 1 is mainly configured to vibrate and generate sound in response to application of an electrical signal, and includes a first base layer 11, a first conductive layer 12, a first edge trace 13, and a first edge insulating layer 14, where the first conductive layer 12 is disposed on one end surface of the first base layer 11 (specifically, a lower end surface of the first base layer 11). In practice, the first substrate layer 11 is preferably made of a material having a low coefficient of linear expansion at a temperature in the range of-40 to 150 °, preferably 15 × 10 -6 The material having a coefficient of expansion (PPM/K) is preferably higher than that of the material having a Young's modulus of 5GPA or higher. The material is preferably transparent polyimide CPI material, and the formed oriented product has high reliability and good restoring force. In this embodiment, the first substrate layer 11 is a transparent polyimide (CPI) layer, and the thickness of the CPI layer is preferably 20um to 25um, the first conductive layer 12 may be an Indium Tin Oxide (ITO) layer, and the thickness of the ITO layer may be about 500nm, and the lower the sheet resistance, the better the sheet resistance, the lower the load power, and preferably 10 ohms, and the higher the transmittance, the better the load power, and preferably 88% or more. In other embodiments, the first conductive layer 12 may also adopt a composite structure of Indium Tin Oxide (ITO) layer + silver layer + Indium Tin Oxide (ITO) layer.
The first edge trace 13 is disposed on an edge of an end surface (specifically, a lower end surface of the first conductive layer 12) of the first conductive layer 12, which is far away from the first substrate layer 11, and in implementation, the first edge trace 13 is disposed at least along the edge of at least one edge of the first conductive layer 12, and the material of the first edge trace 13 may be silver paste or copper paste. Of course, in other embodiments, the traces may be disposed on both the edge and the surface of the first conductive layer 12, that is, the entire surface of the conductive trace may be disposed.
The first edge insulating layer 14 is disposed on the first edge trace 13 and at least covers the first edge trace 13, and in practice, the first edge insulating layer 14 may be an OCA (optical Clear Adhesive) optical Adhesive layer. Of course, if the wires are disposed on both the edge and the surface of the first conductive layer 12, correspondingly, the insulating layers need to be disposed on both the edge wires and the in-plane wires, that is, the entire insulating layer is disposed.
In one embodiment a, the first substrate layer 11 is first rolled and fed, then a first conductive layer 12 is plated on a surface of the first substrate layer 11 (i.e., a lower surface of the first substrate layer 11), then a first edge trace 13 is formed at an edge of the first conductive layer 12 (specifically, the rolled film is divided into a plurality of independent areas, the first edge trace 13 is disposed at an edge of the first conductive layer 12 in each area, and an invalid area larger than 5mm is reserved outside the first edge trace 13 in each area, so as to facilitate later cutting and improve yield), then a first edge insulating layer 14 is disposed on the first edge trace 13, then the first substrate layer 11 is cut into small pieces as required, so as to form the vibration layers 1, and then each vibration layer 1 is bound to a flexible printed circuit (FPC, not shown).
In another embodiment B, as shown in fig. 4 and 6, the process for preparing the vibration layer 1 includes: s11, first coating a stock solution such as CPI (transparent polyimide film) on a Carrier Glass (CG) 5, and curing the CPI stock solution to form a first base layer 11; s12, plating a first conducting layer 12 on the cured first base layer 11; s13, forming a first edge wire 13 on the edge of the first conductive layer 12, and forming a first edge insulating layer 14 covering the first edge wire 13 on the first edge wire 13; s14, a Flexible Printed Circuit (FPC) is bonded to the first base layer 11, and then the carrier glass 4 is peeled off to form the vibration layer 1. And finally, covering the front side and the back side of the vibration layer 1 with a protective film for shipment, and tearing off the protective film for use during use. The CPI stock is coated on a carrier glass 4 to make the CPI optical grade. However, in the first example a, since the number of times of attaching the carrier glass 4 is small, the production yield is higher than that in the example B.
The front back polar plate 3 is attached to the frame of the vibration layer 1 and used for supporting the vibration of the vibration layer 1. Specifically, in this embodiment, the front back plate 3 includes a second base layer 31, a second conductive layer 32, a second edge wire 33, and a second edge insulating layer 34, where the second conductive layer 32 is disposed on an end surface of the second base layer 31 (specifically, a lower end surface of the second base layer 31) far away from the vibrating layer 1, in implementation, the second base layer 31 may also be a transparent polyimide (CPI) layer, and the thickness thereof is preferably 4um to 6um, the second conductive layer 31 may also be an Indium Tin Oxide (ITO) layer, and the thickness thereof may be about 500nm, the lower the sheet resistance thereof, the better the sheet resistance thereof is, the better the transmittance thereof is, and the better the sheet resistance thereof is, and the sheet resistance thereof is preferably greater than 88%.
The second edge trace 33 is disposed on the edge of the end surface (specifically, the lower end surface of the second conductive layer 32) of the second conductive layer 32 far from the second substrate layer 31, and in implementation, the second edge trace 33 is disposed at least along the edge of at least one edge of the second conductive layer 32, and the second edge trace 33 may be made of silver paste or copper paste. Of course, in other embodiments, the traces may be disposed on both the edge and the surface of the second conductive layer 32, that is, the entire surface of the conductive trace is disposed.
The second edge insulating layer 34 is disposed on the second edge trace 33, at least covering the second edge trace 33, and in practice, the second edge insulating layer 34 may be an OCA (optical Clear Adhesive) optical Adhesive layer. Certainly, if the wires are disposed on the edge and the surface of the second conductive layer 32, correspondingly, the insulating layers need to be disposed on the edge wires and the surface wires, that is, the whole insulating layer is disposed.
In implementation, the lower the wire resistance of the edge wire and the whole conductive wire is, the more beneficial the load power is to be reduced. And the lower the height of the edge routing and the whole conductive routing, the smaller the edge section difference, and the better the appearance after the vibration layer 1 is attached to the front back polar plate 3. The smaller the edge is optically visually inferior due to the step difference. The edge wiring resistance is preferably lower than 3 ohms, copper wiring is preferably selected, and the thickness of copper can be made to be less than 1 um. The width of the copper wire in the plane can be 5 um-10 um, and the visual effect is good.
In one embodiment A1, the second substrate layer 31 is first rolled and fed, then a second conductive layer 32 is plated on the surface of the second substrate layer 31, then a second edge trace 33 is formed at the edge of the second conductive layer 32 (the roll film is divided into a plurality of independent areas, specifically, the second edge trace 33 is arranged at the edge of the second conductive layer 32 in each area, and an invalid area larger than 5mm is reserved outside the second edge trace 33 in each area, so that the later cutting is facilitated and the yield is improved), then a second edge insulating layer 34 is arranged on the second edge trace 33, then a micro pattern 2 is formed on the end surface of the second substrate layer 11 far from the second conductive layer 32, then the second substrate layer 31 is cut into small pieces as required, so as to form individual front back plates 3, and then each front back plate 3 is bound to a flexible circuit board (FPC, not shown in the figure).
In another embodiment B, as shown in fig. 7, the process for preparing the front back plate 3 includes: s211, coating a stock solution such as CPI (transparent polyimide film) on Carrier Glass (CG), and curing the CPI stock solution to form a second base layer 31; s212, plating a second conductive layer 32 on the cured second base layer 31; s213, forming a second edge trace 33 on the edge of the second conductive layer 32, and forming a second edge insulating layer 34 covering the second edge trace 33 on the second edge trace 33; s214, attaching carrier glass to an end surface of the second conductive layer 32 away from the second base layer 31 (i.e., a lower end surface of the second conductive layer 32), and then peeling off the carrier glass on the second base layer 31; s215, forming a micro pattern 2 on an end surface (i.e. an upper end surface of the second substrate layer 31) of the second substrate layer 31 away from the second conductive layer 32, then binding the flexible circuit board on the second substrate layer 31, and then peeling off the carrier glass on the second conductive layer 32 to form the front back plate 3. And finally, covering the front and back surfaces of the front and back polar plates 3 with a protective film for shipment, and tearing off the protective film for use when in use.
The plating conductive layer can adopt a magnetron sputtering mode of plating a conductive layer on carrier glass, and different sizes are matched and erected with inconsistent jigs. The edge routing can be copper edge routing or silver paste edge routing. In the case of copper, thin copper is generally used, copper is plated on the whole surface, and unnecessary portions are etched by post-exposure and development. If the silver paste is fed, the silk screen printing or the silk screen printing plus laser mode can be fed. The whole surface insulation can be carried out by adopting the processes of silk-screen printing, evaporation, magnetron sputtering, spin coating and the like. If the pattern is formed in one time, silk screen printing can be selected, and exposure and development can be selected after 2 times of forming.
In one embodiment, the first substrate layer 11 with a thickness of 23um to 25um is preferably used, the center distance of the matching micro-patterns 2 (i.e. the center distance between two adjacent micro-patterns 2) is 1.1mm, the height of the micro-patterns 2 is 15um to 17um, the frequency of the directional sound generating device can fall between 70kHZ and 85kHZ, and the directional sound generating device formed by the matching structure has better efficiency and low distortion. In another embodiment, if the CPI material with a thickness of 50um is used for the first substrate layer 11, the micro-patterns 2 with a center distance of 1.35um to 1.5um can be matched, the height of the micro-patterns 2 is 8um to 12um, and the frequency of the directional sound generating device can fall between 70kHZ and 85 kHZ.
Referring to fig. 5, a manufacturing process of a foldable directional sound generator according to an embodiment of the present invention includes:
s1, preparing a vibration layer 1, and binding a flexible circuit board on the vibration layer 1;
s2, preparing a front back plate 3, making micro patterns 2 on the surface of the front back plate 3, and binding a flexible circuit board on the front back plate 3.
The preparation of the vibration layer 1 and the specific preparation steps of the front back plate 3 can refer to the description in the directional sound-generating device, and are not described herein again.
And S3, performing frame fitting on the vibration layer 1 and the whole back plate.
Since the directional sound generating device needs the vibration layer 1 to maintain a certain tension, if the vibration layer 1 and the front back plate 3 are all film-like, the vibration layer 1 and the front back plate 3 need to be bonded together with a certain tension.
Referring to fig. 8, in an embodiment, the step S3 specifically includes: s31, bonding the first base layer 11 of the vibration layer 1 with carrier glass; s32, tensioning the front back plate by using tensioning equipment; s33, attaching the vibration layer 1 adhered with the carrier glass in the step 31 to the frame of the front back plate tensioned in the step 32; and S34, after the whole directional sounding device 10 is subjected to UV light, peeling off the carrier glass. In the implementation, the carrier glass is specifically attached to the vibration layer 1 by using UV viscosity reducing glue, and when the carrier glass is used, if the carrier glass is not combined with the display layer 5, the step S34 is directly executed; if the directional sound generating device 10 is attached to the display layer 5, the step S34 is executed after the directional sound generating device 10 is attached to the display layer 5. This embodiment facilitates a reduction in the overall cycle time of the directional sounding device 10.
In another embodiment, if the front back plate is attached to the display layer 5, the front back plate may be directly and completely attached to the display layer 5, then the vibration layer 1 is tensioned by the tensioning device, the vibration layer 1 is attached to the front back plate attached to the display layer 5, and finally the tensioning device is removed, and the finally formed display device 20 is trimmed to obtain the final product.
The foldable display device 20 disclosed by the invention comprises the directional sound-generating device 10 and the display layer 5, wherein the specific structure and the specific manufacturing process of the directional sound-generating device 10 can refer to the description of the directional sound-generating device, and are not described herein again. In this embodiment, the directional sound generating device 10 is directly attached to the display layer 5, that is, externally attached to the display layer 5, and specifically, the directional sound generating device 10 can be completely attached to the front back plate 3 through an adhesive layer, and specifically, the directional sound generating device is completely attached to an end surface (that is, a lower end surface of the second conductive layer 32) of the second conductive layer 32 away from the second substrate layer 31 of the front back plate 3 through an adhesive layer. In this embodiment, the optical films are specifically adhered by an OCA optical adhesive layer. In other alternative embodiments, the directional sound emitting device 10 may be integrated with the display layer 5, for example, the front back plate 3 may be directly formed on the display layer 5.
In practice, the display layer 5 may be implemented by using an existing folding display layer. In this embodiment, the display layer 5 specifically includes a protection layer 51, a polarizer 52 (Pol), a foldable array 53, and a lower screen support layer 54 stacked in sequence from top to bottom, where the protection layer 51 may be a single-layer protection layer or a multi-layer composite protection layer, the single-layer protection layer may be any one of UTG ultra-thin glass, PET, and CPI films, and the multi-layer composite protection layer may be a combination of any two or three of UTG ultra-thin glass, PET, and CPI films. The protective layer 51 and the polarizer 52 are also adhered to each other through an OCA optical adhesive layer.
As shown in fig. 9a and 9b, the foldable display device 20 can be folded outwards or inwards. After bending, a bending angle area 21 formed by folding is formed, and the edge routing is not arranged in the bending angle area 21, that is, the edge routing avoids the bending angle area 21, so that damage to the edge routing caused by multiple folding is avoided.
The directional sounding device 10 has the advantages that 1, the directional sounding device 10 is foldable, can be combined with various interfaces such as planes and curved surfaces, and can be applied to various application occasions. 2. The directional sounding device 10 is combined with the foldable display layer 5, so that the display screen 6 can be folded and can also generate sound directionally. 3. When the vibrating layer 1 and the front back plate 3 are prepared, a new process is adopted, particularly the carrier glass is adopted, the CPI can be in an optical grade, and the prepared product has high yield and low cost.
The foregoing descriptions of specific exemplary embodiments of the present invention have been 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 certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (11)
1. A foldable directional sound emitting device, comprising:
the vibration layer comprises a first substrate layer and a first conductive layer, the first conductive layer is arranged on one end face of the first substrate layer, and the vibration layer vibrates and produces sound under the action of a loaded electric signal;
the front back polar plate is attached to the frame of the vibration layer, the front back polar plate comprises a second base layer and a second conducting layer, and the second conducting layer is arranged on the end face, far away from the vibration layer, of the second base layer;
the micro-pattern is arranged on the end face, close to the vibration layer, of the second substrate layer, is positioned between the first conducting layer and the second substrate layer after the vibration layer is attached to the frame of the front back polar plate, and is used for providing an air gap required by vibration of the vibration layer;
the first substrate layer and the second substrate layer are both folded films.
2. The foldable directional sound generator of claim 1,
the vibration layer further includes: the first edge routing wire is arranged on the edge of the end face, close to the front back polar plate, of the first conductive layer, and the second edge insulating layer is arranged on the first edge routing wire and covers the first edge routing wire;
the front back plate further comprises: the second edge routing line is arranged on the edge of the end face, away from the second basal layer, of the second conductive layer, and the second edge insulating layer is arranged on the second edge routing line and covers the first edge routing line.
3. A foldable display device, characterized in that the display device comprises a directional sound-emitting device and a display layer, the directional sound-emitting device is the foldable directional sound-emitting device of claim 1 or 2, the directional sound-emitting device is directly attached to the display layer, or the directional sound-emitting device and the display layer are integrally integrated.
4. The foldable display device of claim 3, wherein the display layer comprises a protective layer, a polarizer, a foldable array and a bottom-screen support layer stacked in sequence from top to bottom, and the protective layer is adhered to the second conductive layer of the front plate.
5. The foldable display device of claim 4, wherein the protective layer is a single protective layer that is any one of UTG ultra-thin glass, PET and CPI film or a multi-layer composite protective layer that is a combination of any two or three of UTG ultra-thin glass, PET and CPI film.
6. A foldable display device according to claim 3, wherein the display device has a bend angle area formed by folding, the bend angle area being free of edge traces.
7. A process for manufacturing a foldable directional sound generator according to claim 1, wherein the process comprises:
s1, preparing a vibration layer, and binding a flexible circuit board on the vibration layer;
s2, preparing a front back plate, making the micro-pattern on the surface of the front back plate, and binding a flexible circuit board on the front back plate;
and S3, performing frame fitting on the vibration layer and the front back polar plate.
8. A process for preparing a foldable directional sound generator according to claim 7, wherein S1 comprises:
s11, coating the stock solution of the first substrate layer on carrier glass, and solidifying the stock solution of the first substrate layer to form the first substrate layer;
s12, plating the first conducting layer on the cured first base layer;
s13, performing first edge routing on the edge of the first conductive layer, and performing a first edge insulating layer covering the first edge routing on the first edge routing;
s14, binding a flexible circuit board on the first substrate layer, and then stripping off the carrier glass to form the vibration layer.
9. A process for preparing a foldable directional sound emitting device according to claim 7, wherein S2 comprises:
s21, coating the stock solution of the second substrate layer on carrier glass, and solidifying the stock solution of the second substrate layer to form the second substrate layer;
s22, plating the second conducting layer on the cured second base layer;
s23, making a second edge wire on the edge of the second conducting layer, and making a second edge insulating layer covering the second edge wire on the second edge conducting layer;
s24, attaching carrier glass to the end face, away from the second substrate layer, of the second conducting layer, and then stripping the carrier glass on the second substrate layer;
and S25, making the micro-pattern on the end face, far away from the second conducting layer, of the second substrate layer, binding the flexible circuit board on the second substrate layer, and stripping off the carrier glass on the second conducting layer to form the front back electrode plate.
10. A process for preparing a foldable directional sound generator as claimed in claim 7, wherein S3 comprises:
s31, using carrier glass to be attached to the first substrate layer of the vibration layer;
s32, tensioning the front back plate by using tensioning equipment;
and S33, attaching the vibration layer adhered with the carrier glass in the step 31 to the frame of the front back plate tensioned in the step 32.
11. A process for manufacturing a foldable display device according to any one of claims 3 to 6, said process comprising:
preparing a foldable directional sounding device, wherein the directional sounding device is prepared by the preparation process of the foldable directional sounding device of any one of claims 7 to 10;
and B, directly attaching the directional sounding device to the display layer, or integrally integrating the directional sounding device and the display layer.
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| CN115942219B (en) | 2023-12-08 |
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