High-efficiency and directivity-deflectable directional sound production screen

Abstract

Disclosed is a high-efficiency and directivity-deflectable directional sound production screen, comprising a vibration layer and a non-vibration layer. A first conductive pattern is formed on the vibration layer, and the first conductive pattern comprises a plurality of first conductive channels which extend in a first direction and are insulated from each other; a second conductive pattern is formed on the non-vibration layer, and the second conductive pattern comprises a plurality of second conductive channels which extend in a second direction and are insulated from each other; and when the vibration layer is attached to the non-vibration layer, the first conductive channels and the second conductive channels intersect and overlap to form a plurality of sound production regions, and each sound production region independently produces sound under the driving of an external driving signal and / or is randomly combined with at least one of the other sound production regions to produce sound. According to the present invention, the directivity deflection of the directional sound production screen is achieved, and the power consumption required by the whole directional sound production screen is reduced.

Description

A highly efficient and deflectable directional sound screen Technical Field

[0001] The present invention relates to the technical field of directional sound generation from screens, and in particular to a highly efficient directional sound generation screen with deflectable direction. Background Art

[0002] Ultra-thin, narrow-bezel, and even full-screen displays are increasingly leaving less space for sound-generating devices. Traditional sound-generating devices are bulky and limited in their placement, making them difficult to find suitable locations and space within newer generation display devices. Therefore, a redesigned sound-generating device is needed to adapt to the demands of current display devices.

[0003] Some display device manufacturers have designed ways to generate sound through screens. Screen sound technology, a surface audio technology, offers a new solution for multimedia audiovisual equipment. Currently, transparent screen-based directional speakers, combining display devices with screen sound generators, are under development. These speakers utilize the screen's own vibrations as a speaker, saving the resonant cavity space of traditional speakers. Their directional propagation characteristics also meet the privacy requirements of personal electronic devices while ensuring non-interference with public devices.

[0004] However, existing screen sound-generating devices emit sound across the entire screen, meaning the sound-generating area occupies a 1:1 ratio with the entire screen's visible area. This design is highly efficient for small screens (e.g., those under 14 inches). However, for large screens (e.g., those larger than 14 inches), if a design that emits sound across the entire visible area is adopted, the power consumption will be significantly higher than for a small screen to achieve the same sound pressure level as a small screen under 14 inches. This order of magnitude increase in system power consumption will result in higher system energy consumption, which in turn will shorten the product lifespan.

[0005] In addition, in order to achieve the directional deflection of the sound field of the screen sound device, the screen sound device is usually divided into multiple sound channels. By adjusting the delay and phase of each channel, the ultrasonic waves emitted by the screen sound device are deflected and focused, so that the sound beam is emitted in a direction toward the receiver.

[0006] However, using multi-channel signal processing to adjust the phase of each channel requires that the spacing between channels be controlled to be less than the wavelength corresponding to the ultrasonic frequency, otherwise sidelobes will appear in the sound field. For example, an ultrasonic frequency of 40kHz corresponds to a sound wave wavelength of approximately 8.6mm, and a 0.2m wide screen sound-emitting device requires at least 24 channels. For example, an ultrasonic frequency of 80kHz corresponds to a sound wave wavelength of approximately 4.3mm, and a 0.2m wide screen sound-emitting device requires at least 47 channels. Therefore, using multi-channel signal processing to adjust the phase of each channel requires a larger number of channels, which will increase the complexity and cost of the system.

[0007] Therefore, it is necessary to improve the prior art to overcome the above defects. Summary of the invention:

[0008] The object of the present invention is to provide a directional sound screen which is efficient and can be deflected.

[0009] To achieve the above objectives, the present invention proposes an efficient and directionally deflectable directional sound screen, comprising a vibration layer and a non-vibration layer bonded to the frame of the vibration layer, an air gap required for the vibration layer to vibrate up and down is formed between the vibration layer and the non-vibration layer, a first conductive pattern is formed on the surface of the vibration layer close to the non-vibration layer, the first conductive pattern includes a plurality of first conductive channels, each of the first conductive channels extends and is distributed along a first direction, and the first conductive channels are insulated and spaced apart; a second conductive pattern is formed on the surface of the non-vibration layer close to the vibration layer, the second conductive pattern includes a plurality of second conductive channels, each of the second conductive channels extends and is distributed along a second direction, and the second conductive channels are insulated and spaced apart; the first direction intersects with the second direction, and after the vibration layer and the non-vibration layer are bonded, the first conductive channels on the vibration layer and the second conductive channels on the non-vibration layer intersect and overlap to form multiple sound-emitting areas, each of which emits sound independently and / or randomly combines with at least one other sound-emitting area under the drive of an external drive signal.

[0010] In a preferred embodiment, the first direction is horizontal, the second direction is vertical or inclined to the horizontal; or the second direction is horizontal, the first direction is vertical or inclined to the horizontal; or both the first direction and the second direction are inclined to the horizontal.

[0011] In a preferred embodiment, the first direction and the second direction are perpendicular to each other.

[0012] In a preferred embodiment, the first conductive paths are separated by a first non-conductive layer, and the second conductive paths are separated by a second non-conductive layer. The edges of the first non-conductive layer and the second non-conductive layer are straight or curved.

[0013] In a preferred embodiment, the first non-conductive layer is composed of a plurality of connected and repeated first sub-non-conductive layers, each of the first sub-non-conductive layers includes a first line segment, a second line segment, a third line segment and a fourth line segment connected in sequence, the first line segment is an arc-shaped extending along the first direction and convex toward the dot, the second line segment is an arc-shaped extending along the first direction and concave toward the dot, the third line segment is an arc-shaped extending along the first direction and concave toward the dot, the fourth line segment is an arc-shaped extending along the first direction and convex toward the dot, and the line segment formed by connecting the first line segment and the second line segment and the line segment formed by connecting the third line segment and the fourth line segment are axially symmetric about an axis perpendicular to the first direction; the second non-conductive layer is composed of a plurality of connected and repeated second sub-non-conductive layers, each of the second sub-non-conductive layers includes a fifth line segment and a sixth line segment connected in sequence, the fifth line segment is an arc-shaped extending along the second direction and convex toward the dot, the sixth line segment is an arc-shaped extending along the second direction and concave toward the dot, and the fifth line segment and the sixth line segment are centrally symmetric about their connection point.

[0014] In a preferred embodiment, the first conductive pattern forming process includes: forming a first conductive layer on the surface of the vibration layer, exposing and developing the first conductive layer through an exposure, development and etching process, and etching the first conductive path; the second conductive pattern forming process includes: forming a second conductive layer on the surface of the non-vibration layer, exposing and developing the second conductive layer through an exposure, development and etching process, and etching the second conductive path.

[0015] In a preferred embodiment, the width of the first non-conductive layer and the second non-conductive layer is less than 50 um.

[0016] In a preferred embodiment, each of the first conductive channels and each of the second conductive channels is controlled by a separate drive signal. By inputting a corresponding drive signal into the conductive channel combination, each sound-emitting area can independently emit sound and / or randomly emit sound in combination with at least one other sound-emitting area under the drive of an external drive signal.

[0017] In a preferred embodiment, the directional sound screen also includes a supporting structure and an insulating layer located between the vibration layer and the non-vibration layer. The material of the supporting structure and the insulating layer is an insulating material doped with non-polar molecules and symmetrical molecules, and the vibration layer and the non-vibration layer are fixed by the supporting structure.

[0018] In a preferred embodiment, the vibration layer includes a touch composite layer, the touch composite layer includes a vibration substrate layer and a touch layer adhered to the surface of the vibration substrate layer close to the non-vibration layer, and the first conductive pattern is formed on the surface of the touch layer close to the non-vibration layer.

[0019] In a preferred embodiment, the touch composite layer further includes a cover layer, and the cover layer is a CPI (polyimide) layer or a composite UTG (ultra-thin glass) layer.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention forms multiple conductive channels on the vibration layer and non-vibration layer of the directional sound screen. These conductive channels overlap after the vibration layer and the non-vibration layer are superimposed to form multiple sound areas. By driving these sound areas individually or in combination, the directivity of the directional sound screen can be deflected and human ear tracking can be achieved. Compared with the existing solution of achieving directivity deflection by adjusting the delay and phase of each channel, the complexity of implementation is reduced, thereby reducing costs. In addition, because the sound areas can be controlled independently, the size of the entire sound area can be controlled according to the screen size and the minimum sound area of ​​directional sound. Therefore, the power consumption required for the directional sound screen as a whole can be reduced while ensuring the sound pressure level of the entire directional sound screen, thereby extending the service life of the entire product.

[0022] 2. The present invention designs the conductive pattern so that the sound-emitting area is approximately circular, thereby maximizing the sound-emitting efficiency of the directional sound-emitting screen and minimizing the system power.

[0023] 3. The present invention combines the directional deflection of the directional sound screen and the controllable size of the sound area with the touch layer, so that the directional sound screen can realize directional sound and touch functions while achieving directional deflection and improved sound efficiency. Description of the drawings:

[0024] FIG1 is a schematic structural diagram of a first conductive pattern on a vibration layer of the present invention (one embodiment);

[0025] FIG2 is a schematic structural diagram of a second conductive pattern on a non-vibration layer of the present invention (one embodiment);

[0026] FIG3 is a schematic structural diagram of a sound-generating area formed by laminating a vibration layer and a non-vibration layer according to an embodiment of the present invention;

[0027] FIG4 is a schematic structural diagram of a conductive pattern on a vibration layer / non-vibration layer (another embodiment) of the present invention;

[0028] FIG5 is a schematic structural diagram of a first conductive pattern on a vibration layer of the present invention (preferred embodiment);

[0029] FIG6 is a schematic structural diagram of a second conductive pattern on a non-vibration layer of the present invention (preferred embodiment);

[0030] FIG7 is a schematic structural diagram of a sound-generating area formed after laminating the vibration layer and the non-vibration layer of the present invention (a preferred embodiment);

[0031] FIG8 is a schematic structural diagram of a directional sound screen according to an embodiment of the present invention;

[0032] FIG9 is a schematic structural diagram of a touch composite layer according to an embodiment of the present invention;

[0033] FIG10 is a schematic structural diagram of a touch composite layer according to another embodiment of the present invention;

[0034] FIG11 is a schematic structural diagram of a UTG composite layer (plus a first edge trace and an edge insulation layer) in one embodiment of the present invention;

[0035] FIG12 is a schematic structural diagram of a UTG composite layer (plus a first edge trace and a first full-surface insulating layer) in another embodiment of the present invention.

[0036] The accompanying drawings are marked as follows: 1. Vibration layer, 11. Touch composite layer, 111. Vibration membrane, 112. Touch layer, 1121. Touch substrate layer, 1122. Touch upper conductive layer, 1123. Touch lower conductive layer, 1124. Anti-signal interference layer, 113. Cover layer, 1131. UTG layer, 1132. Anti-splash layer, 1133. Anti-warping coating, 12. First edge routing, 13. Support structure, 14. Edge insulation layer, 15. First whole-surface insulation layer, 2. Non-vibration layer, 21. Support substrate layer, 22. Second Edge routing, 23. Second full-surface insulation layer, 24. Fixed layer, 3 / 31. Sound-generating area, 4. First conductive channel, 41. Conductive area, 5. First conductive layer, 6. First non-conductive layer, 61. First sub-non-conductive layer, 611. First line segment, 612. Second line segment, 613. Third line segment, 614. Fourth line segment, 7. Second conductive channel, 71. Conductive area, 8. Second conductive layer, 9. Second non-conductive layer, 91. Second sub-non-conductive layer, 911. Fifth line segment, 912. Sixth line segment. Specific implementation method:

[0037] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0038] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations such as "include" or "comprising", etc., will be understood to include the stated elements or components but not to exclude other elements or other components.

[0039] As shown in Figures 1 to 8, the present invention discloses an efficient and directionally deflectable directional sound screen, which includes a vibration layer 1 and a non-vibration layer 2, wherein a first conductive pattern is formed on the surface of the vibration layer 1 close to the non-vibration layer 2, and a second conductive pattern is formed on the surface of the non-vibration layer 2 close to the vibration layer 1. After the frames of the vibration layer 1 and the non-vibration layer 2 are bonded together, the first conductive pattern and the second conductive pattern cross and overlap to form a plurality of sound areas 3. Each sound area 3 can make sound independently and / or randomly combine with at least one other sound area 3 under the drive of an external driving signal, thereby realizing the directional deflection of sound waves and maximizing the sound efficiency.

[0040] Specifically, as shown in Figures 1 and 3 to 5, the first conductive pattern includes a plurality of first conductive channels 4, each of which extends and is distributed along the first direction, and two adjacent first conductive channels 4 are insulated and spaced apart. During implementation, a first conductive layer 5 can be formed on the entire surface of the vibration layer 1 close to the non-vibration layer 2, and then the first conductive layer 5 is exposed and developed through an exposure, development, and etching process, and a plurality of first non-conductive layers 6 are etched out. The plurality of first non-conductive layers 6 divide the first conductive layer 5 into a plurality of first conductive channels 4, that is, a first conductive pattern is formed on the vibration layer 1, and two adjacent first conductive channels 4 are insulated and separated by a first non-conductive layer 6. Similarly, as shown in Figures 2, 6, and 7, the second conductive pattern includes a plurality of second conductive channels 7, each of which extends and is distributed along the second direction, and two adjacent second conductive channels 7 are insulated and spaced apart. During implementation, a second conductive layer 8 can be formed on the entire surface of the non-vibration layer 2 close to the vibration layer 1, and then the second conductive layer 8 is exposed and developed through an exposure, development and etching process, and a plurality of second non-conductive layers 9 are etched out. The plurality of second non-conductive layers 9 divide the second conductive layer 8 into a plurality of second conductive channels 7, that is, a second conductive pattern is formed on the non-vibration layer 2, and two adjacent second conductive channels 7 are insulated and isolated by a second non-conductive layer 9.

[0041] During implementation, the first conductive layer 5 and the second conductive layer 8 can be made of any one of nanosilver, indium tin oxide, metalmesh, carbon nanotubes, graphene, or any combination of two or more high-transmittance materials, or can be non-transparent conductive materials such as any one of copper, copper-doped oxide, silver, gold, or any combination of two or more. The lower the square resistance of the first conductive layer 5 and the second conductive layer 8, the higher the sound efficiency of the entire directional sound screen. Both conductive layers preferably have a square resistance of less than 10 ohms. The first conductive layer 5 and the second conductive layer 8 can be formed on their respective layers by various methods such as coating and silk screen printing, and the present invention does not limit this.

[0042] Preferably, the first direction and the second direction are intersecting, so that the first conductive channel 4 and the second conductive channel 7 can intersect after the vibration layer 1 and the non-vibration layer 2 are bonded together, thereby forming multiple sound-emitting areas 3. During implementation, it is preferred that the first direction and the second direction are perpendicular to each other. For example, if the first direction is horizontal, the second direction is vertical, or if the second direction is horizontal, the first direction is vertical, or the first direction and the second direction are both inclined to the horizontal direction and are perpendicular to each other. As shown in Figure 1, a plurality of first conductive channels 4 uniformly spaced along the vertical direction are formed on the vibration layer 1, each first conductive channel 4 extends along the horizontal direction, and adjacent two first conductive channels 4 are insulated and separated by an etched first non-conductive layer 6. As shown in Figure 2, a plurality of second conductive channels 7 uniformly spaced along the horizontal direction are formed on the non-vibration layer 2, each second conductive channel 7 extends along the vertical direction, and adjacent two second conductive channels 7 are insulated and separated by an etched second non-conductive layer 9. As shown in Figure 3 , when the vibration layer 1 and the non-vibration layer 2 are bonded together, the first conductive channels 4 on the vibration layer 1 and the second conductive channels 7 on the non-vibration layer 2 intersect and overlap to form multiple sound-emitting areas 3. In this embodiment, n×m sound-emitting areas 3 are generally formed, where n is the number of first conductive channels 4 and m is the number of second conductive channels 7, both of which are integers greater than 0. In other words, if the vibration layer 1 has 16 first conductive channels 4 and the non-vibration layer 2 has 16 second conductive channels 7, then when the two are bonded together, 16×16 sound-emitting areas 3 can be formed. As shown in Figure 4 , the first conductive channels 4 on the vibration layer 1 are tilted relative to the horizontal, i.e., they are not horizontal but have a certain steering angle. This design can enhance the visual effect of the directional sound-emitting screen. For example, in one embodiment, if the steering angle is 45°, when the display screen backlight is incident from a direction away from the client, the visual difference caused by optical refraction and reflection, such as moiré, is minimized, thereby maximizing the visual effect.

[0043] Of course, the edges of the first non-conductive layer 6 and the second non-conductive layer 9 are both straight. In other alternative embodiments, their edges may also be curved. When it is curved, as shown in Figures 5 to 7, it is a preferred embodiment of the present invention. In this embodiment, the first non-conductive layer 6 and the second non-conductive layer 9 are both curved with a certain line width. Specifically, the first non-conductive layer 6 is composed of a plurality of connected and repeated first sub-non-conductive layers 61, and each first sub-non-conductive layer 61 includes a first line segment 611, a second line segment 612, a third line segment 613 and a fourth line segment 614 that are connected in sequence and have a certain line width, wherein the first line segment 611 is an arc-shaped extending along the first direction and convex toward the dot, the second line segment 612 is an arc-shaped extending along the first direction and concave toward the dot, the third line segment 613 is an arc-shaped extending along the first direction and concave toward the dot, and the fourth line segment 614 is an arc-shaped extending along the first direction and convex toward the dot, and the line segment formed by the first line segment 611 and the second line segment 612 and the line segment formed by the third line segment 613 and the fourth line segment 614 are axially symmetrical about an axis perpendicular to the first direction. In this embodiment, the first to fourth line segments 611 to 614 are each in the shape of a quarter-circle arc, and each first sub-non-conductive layer 61 is approximately shaped like a horizontal curly bracket ({). Thus, a first conductive channel 4 is formed between two adjacent first non-conductive layers 6. The first conductive channel 4 is composed of a plurality of conductive regions 41 spaced apart along a first direction and approximately shaped like a sweet potato. The second non-conductive layer 9 is composed of a plurality of connected and repeated second sub-non-conductive layers 91, each second sub-non-conductive layer 91 includes a fifth line segment 911 and a sixth line segment 912 that are connected in sequence and have a certain line width, wherein the fifth line segment 911 is an arc extending along the second direction and convex toward the dot, and the sixth line segment 912 is an arc extending along the second direction and concave toward the dot, and the fifth line segment 911 and the sixth line segment 912 are centrally symmetrical about their connection point. In this embodiment, the fifth line segment 911 and the sixth line segment 912 are both 1 / 2 arc-shaped, and each second sub-non-conductive layer 91 is approximately in the shape of a vertical sine curve, so that a second conductive channel 7 is formed between two adjacent second non-conductive layers 9, and the second conductive channel 7 is also composed of a plurality of conductive areas 71 spaced apart along the second direction and approximately in the shape of a sweet potato. In this way, when the vibration layer 1 and the non-vibration layer 2 are attached, the first conductive channel 4 and the second conductive channel 7 can overlap to form multiple sweet potato-shaped sound-emitting areas 3. This design can maximize the use of the area of ​​the conductive channel, that is, within a unit area, the design of the conductive pattern can achieve maximum utilization of the conductive layer, thereby maximizing the sound-emitting efficiency and maximizing the system power. Of course, the setting positions of the above-mentioned first non-conductive layer 6 and the second non-conductive layer 9 can be interchanged, such as setting the first non-conductive layer 6 of the above-mentioned shape on the non-vibration layer 2 and setting the second non-conductive layer 9 of the above-mentioned shape on the vibration layer 1. The present invention does not limit this.During implementation, the radius of the circle corresponding to each line segment can be determined according to actual needs. For example, if the radius is set to 1 cm, the area of ​​the area enclosed by the sound emission area 31 is 8 cm. 2 .

[0044] During operation, each first conductive channel 4 receives a drive signal, and each second conductive channel 7 also receives a drive signal. Thus, to drive a corresponding sound-emitting area 3, only the corresponding drive signal needs to be connected to the conductive channel corresponding to that sound-emitting area 3. For example, to drive sound-emitting area 31 in the diagram, drive signals are input to the first conductive channel 4 and the second conductive channel 7. The same applies to the other sound-emitting areas 3. In this way, each sound-emitting area 3 can be independently controlled and / or randomly combined with at least one other sound-emitting area to produce sound. This allows the size of the entire sound-emitting area to be controlled based on the screen size and the minimum sound-emitting area for directional sound. This reduces the power consumption of the directional sound screen while maintaining the sound pressure level of the entire screen, thereby extending the product's lifespan. Furthermore, the sound output of the corresponding sound-emitting area can be controlled based on the position of the human ear, thereby achieving deflectable directivity and ear-tracking for the directional sound screen.

[0045] Theoretically, the smaller the line width of the first non-conductive layer 6 and the second non-conductive layer 9, the smaller the etching marks, and the higher the visualization effect of the directional sound screen formed in the end. Preferably, it is less than 50um. In the above-mentioned sweet potato-shaped design, the line width of the non-conductive layer is preferably less than 20um, and the Z-shaped etching line design can be used as a reference. The width of the first conductive channel 4 and the second conductive channel 7 is determined by the size of the directional sound screen formed in the end and the minimum sound area of ​​the directional sound, and the present invention does not limit this. In a 27-inch size, the width of the first conductive channel 4 and / or the second conductive channel 7 is 3cm to 8cm, and the number of channels of the first conductive channel 4 and / or the second conductive channel 7 can be set to 16 to 32.

[0046] In one embodiment, as shown in FIG8 , the vibration layer 1 includes a touch composite layer 11, a first conductive layer 5, a first edge trace 12, and a support structure 13. The first conductive layer 5 is formed on the lower surface of the touch composite layer 11 and is exposed, developed, and etched to form the first conductive pattern. The first edge trace 12 is disposed on the lower surface of the first conductive layer 5 and along the outer edge of the first conductive layer 5. The first edge trace 12 can be made of the same material as the first conductive layer 5. The support structure 13 is formed on the first conductive layer 5. During implementation, the support structure 13 comprises insulating support points arranged in an array. In one embodiment, the center-to-center distance between the insulating support points can be 3.0 mm to 4.0 mm, and the height can be 10 to 13 μm. Of course, during implementation, the height and center-to-center distance of the insulating support points can be fine-tuned according to actual needs to achieve maximum sound emission efficiency. During preparation, the support structure 13 can use a screen plate to screen-print the insulating support points on the first conductive layer 5 of the vibration layer 1, and then the vibration layer 1 and the non-vibration layer 2 are frame-fitted together. After fitting, the insulating support points are cured, which can be UV cured or heat cured. UV curing is preferred, which can improve production capacity and optimize process efficiency, that is, effectively prevent the vibration layer 1 from shrinking.

[0047] In this embodiment, the directional sound screen is integrated with the touch layer. The existing touch layer is mainly processed so that it can be combined with the directional sound screen of the present invention. In a specific embodiment, as shown in Figure 9, the touch composite layer 11 includes a vibration membrane 111, a touch layer 112 and a cover layer 113 distributed from top to bottom, wherein the vibration membrane 111 is bonded to the touch layer 112, such as by OCA optical glue. During implementation, the vibration membrane 111 can be made of PET (polyethylene terephthalate), CPI (plastic film), UTG (ultra-thin glass) and other materials, with a thickness of preferably about 50um, and can also be reduced to 25um as needed. The thickness of the OCA optical glue can be 25um. The touch layer 112 can also be bonded to the cover layer 113 by fixing glue. The touch layer 112 can be implemented using an existing more mature touch layer structure. In a specific embodiment, the touch layer 112 can include a touch substrate layer 1121, a touch upper conductive layer 1122 and a touch lower conductive layer 1123 located at the upper and lower end surfaces of the touch layer 112 respectively, and an anti-signal interference layer 1124 located at the upper end surface of the touch upper conductive layer 1122. During implementation, the thickness of the touch layer 112 is preferably 36um. The anti-signal interference layer 1124 can prevent signal interference between the touch layer and the directional sound, and its thickness is preferably 45um. The overall thickness of the entire touch composite layer 11 can be 150um to 200um.

[0048] In one embodiment, as shown in FIG9 , the cover layer 113 preferably adopts a CPI cover layer, which has the advantages of low thickness, high surface scratch resistance, and a surface pencil hardness of 3H to 5H under a load of 750g. During implementation, the thickness of the CPI cover layer can be 6um to 8um, and it is adhered to the touch layer 112 through a fixing glue with a thickness of 6um to 8um. In another alternative embodiment, as shown in FIG10 , the cover layer 113 can adopt a composite UTG layer, which has the advantage of higher reliability than CPI and can be used in application scenarios such as vehicle-mounted industrial control. During implementation, the thickness of the composite UTG layer can be 30um to 50um, and it can also be adhered to the touch layer 112 through a fixing glue with a thickness of 6um to 8um. When the cover layer 113 is a composite UTG layer, in a specific embodiment, as shown in FIG11 , the composite UTG layer includes a UTG layer 1131, an anti-splash layer 1132 and an anti-warping coating layer 1133 located at the upper and lower ends of the UTG layer 1131, respectively. The anti-splash layer 1132 and the anti-warping coating layer 1133 are preferably made of a high-transmittance material with a transmittance TT of more than 80%, and can be formed using a slit coating or roll coating process. In another alternative embodiment, as shown in FIG12 , the composite UTG layer can also eliminate the anti-warping coating layer 1133 on the lower end surface of the UTG layer, that is, directly form the above-mentioned first conductive layer 5 on the lower end surface of the UTG layer 1131. Of course, in other alternative embodiments, the cover layer 113 can also be eliminated, and a hard coating layer (not shown) can be added directly to the lower end surface of the touch layer 112. The thickness can be 10 μm, and the surface pencil hardness can be 3H to 5H under a load of 750 g.

[0049] In addition, as shown in FIG8 , the vibration layer 1 may further include an edge insulation layer 14 and / or a first full-surface insulation layer 15. The edge insulation layer 14 covers the first edge trace 12, and the first full-surface insulation layer 15 entirely covers the first conductive layer 5. Compared to the edge insulation layer, the full-surface insulation layer can effectively reduce the edge step difference of the edge trace, thereby reducing the overall vibration layer fragmentation rate.

[0050] In addition, the composite UTG layer may also serve as the vibration membrane 111 .

[0051] During implementation, as shown in FIG8 , the non-vibration layer 2 may specifically include a supporting substrate layer 21, a second conductive layer 8, a second edge trace 22, a second full-surface insulating layer 23, and a fixed layer 24, wherein the supporting substrate layer 21 may be made of tempered glass. In a specific embodiment, its thickness is 11 mm. The second conductive layer 8 is formed on the upper end surface of the supporting substrate layer 21, and the second conductive layer 8 is exposed, developed, and etched to form the above-mentioned second conductive pattern. The second edge trace 22 is arranged on the upper end surface of the second conductive layer 8 and is arranged along the outer edge of the second conductive layer 8. The material thereof may be the same as that of the second conductive layer 8. The second full-surface insulating layer 23 covers the second conductive layer 8 in its entirety. The fixed layer 24 is formed on the second full-surface insulating layer 23. Its function is to fix the support structure 13 on the vibration layer 1, that is, the upper end of the support structure 13 is fixedly formed on the first conductive layer 5, and the lower end is fixed to the fixed layer 24, thereby achieving fixation of the vibration layer 1 and the non-vibration layer 2. During implementation, the fixing layer 24 can be formed by 3D printing, silk screen printing, exposure and development, etc. The material is a material with adhesive properties and is non-sticky after being completely cured. Its main function is to fix the support structure 13 and the vibration layer 1 / non-vibration layer 2.

[0052] Preferably, the materials of the above-mentioned insulating layer (including the edge insulating layer 14, the first full-surface insulating layer 15, and the second full-surface insulating layer 23) and the support structure 13 are preferably doped with non-polar molecules and symmetrical molecular materials, such as glues, acrylics, polyesters, epoxies, etc. doped with silica balls. If not doped, materials with a small number of polar groups, high molecular weight, and high crystallinity are preferred, such as hydrophobic fumed inorganic silica / ETFE (ethylene-tetrafluoroethylene copolymer) doped with sodium iron ions with a PPM (Parts Per Million) of less than 10. This material has a low degree of polarization when subjected to an external electric field and undergoes polarization, and improves the support strength of the support structure 13, thereby improving its reliability and preventing it from collapsing.

[0053] The advantages of the present invention are as follows: 1. By forming multiple conductive channels on the vibration layer 1 and non-vibration layer 2 of the directional sound screen, these conductive channels overlap to form multiple sound-emitting areas 3 after the vibration layer 1 and non-vibration layer 2 are superimposed. By driving these sound-emitting areas 3 individually or in combination to emit sound, the directivity of the directional sound screen can be deflected, achieving human ear tracking. Compared with existing solutions that achieve directivity deflection by adjusting the delay and phase of each channel, the complexity of implementation is reduced, thereby reducing costs. In addition, because the sound-emitting areas can be independently controlled, the size of the entire sound-emitting area can be controlled according to the screen size and the minimum sound-emitting area for directional sound. Therefore, the power consumption required for the directional sound screen as a whole can be reduced while ensuring the sound pressure level of the entire directional sound screen, thereby extending the service life of the entire product. 2. By designing the conductive pattern, the present invention makes the sound-emitting area 3 approximately circular, thereby maximizing the sound efficiency of the directional sound screen and minimizing the system power. 3. The present invention combines the directional deflection of the directional sound screen and the controllable size of the sound area with the touch layer, so that the directional sound screen can realize directional sound and touch functions while achieving directional deflection and improved sound efficiency.

[0054] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. An efficient and deflectable directional sound screen, characterized in that: The directional sound-emitting screen includes a vibration layer and a non-vibration layer attached to the frame of the vibration layer, an air gap required for the vibration layer to vibrate up and down is formed between the vibration layer and the non-vibration layer, a first conductive pattern is formed on the surface of the vibration layer close to the non-vibration layer, the first conductive pattern includes a plurality of first conductive channels, each of the first conductive channels extends and is distributed along a first direction, and the first conductive channels are insulated and spaced apart; a second conductive pattern is formed on the surface of the non-vibration layer close to the vibration layer, the second conductive pattern includes a plurality of second conductive channels, each of the second conductive channels extends and is distributed along a second direction, and the second conductive channels are insulated and spaced apart; the first direction intersects with the second direction, and after the vibration layer and the non-vibration layer are attached, the first conductive channels on the vibration layer intersect and overlap with the second conductive channels on the non-vibration layer to form a plurality of sound-emitting areas, each of the sound-emitting areas independently emits sound and / or randomly emits sound in combination with at least one other sound-emitting area under the drive of an external driving signal.

2. A highly efficient and directional sound screen with deflectable direction as claimed in claim 1, characterized in that: The first direction is a horizontal direction, and the second direction is a vertical direction or inclined to the horizontal direction; or the second direction is a horizontal direction, and the first direction is a vertical direction or inclined to the horizontal direction; or both the first direction and the second direction are inclined to the horizontal direction.

3. A highly efficient and directional sound screen with deflectable direction as claimed in claim 1, characterized in that: The first direction and the second direction are perpendicular to each other.

4. A highly efficient and directional sound screen with deflectable direction as claimed in claim 1, characterized in that: The first conductive channels are separated from each other by a first non-conductive layer, and the second conductive channels are separated from each other by a second non-conductive layer. The edges of the first non-conductive layer and the second non-conductive layer are straight or curved.

5. A highly efficient and directional sound screen with deflectable direction as claimed in claim 4, characterized in that: The first non-conductive layer is composed of a plurality of connected and repeated first sub-non-conductive layers, each of which includes a first line segment, a second line segment, a third line segment and a fourth line segment connected in sequence, the first line segment is an arc-shaped extending along the first direction and convex to the dot, the second line segment is an arc-shaped extending along the first direction and concave to the dot, the third line segment is an arc-shaped extending along the first direction and concave to the dot, the fourth line segment is an arc-shaped extending along the first direction and convex to the dot, and the line segment formed by the first line segment and the second line segment and the line segment formed by the third line segment and the fourth line segment are axially symmetric about an axis perpendicular to the first direction; the second non-conductive layer is composed of a plurality of connected and repeated second sub-non-conductive layers, each of which includes a fifth line segment and a sixth line segment connected in sequence, the fifth line segment is an arc-shaped extending along the second direction and convex to the dot, the sixth line segment is an arc-shaped extending along the second direction and concave to the dot, and the fifth line segment and the sixth line segment are centrally symmetric about their connection point.

6. A highly efficient and directional sound screen with deflectable direction as claimed in claim 1, characterized in that: The first conductive pattern forming process includes: forming a first conductive layer on the surface of the vibration layer, exposing and developing the first conductive layer through an exposure, development and etching process, and etching the first conductive path; the second conductive pattern forming process includes: forming a second conductive layer on the surface of the non-vibration layer, exposing and developing the second conductive layer through an exposure, development and etching process, and etching the second conductive path.

7. A highly efficient and directional sound screen with deflectable direction as claimed in claim 4, characterized in that: The width of the first non-conductive layer and the second non-conductive layer is less than 50 um.

8. The highly efficient and directional sound-emitting screen as claimed in claim 1, characterized in that: Each of the first conductive channels and each of the second conductive channels is controlled by a separate driving signal. By inputting corresponding driving signals into the conductive channel combination, each sound emitting area can emit sound independently and / or randomly emit sound in combination with at least one other sound emitting area under the drive of an external driving signal.

9. The highly efficient and directional sound screen with deflectable direction as claimed in claim 1, characterized in that: The directional sound screen also includes a support structure and an insulating layer located between the vibration layer and the non-vibration layer. The materials of the support structure and the insulating layer are insulating materials doped with non-polar molecules and symmetrical molecules. The vibration layer and the non-vibration layer are fixed by the support structure.

10. The highly efficient and directional sound-emitting screen as claimed in claim 1, characterized in that: The vibration layer includes a touch composite layer, which includes a vibration substrate layer and a touch layer attached to a surface of the vibration substrate layer close to the non-vibration layer, and the first conductive pattern is formed on the surface of the touch layer close to the non-vibration layer.

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