Electrostatic loudspeaker and sounding glass
By embedding electrostatic speakers in the vehicle glass, using electrostatic charge and electric field changes to generate sound, the problems of uneven position distribution and electromagnetic induction interference of vehicle speakers are solved, and a better auditory experience and aesthetics are achieved.
Patent Information
- Application Number
- CN202420389109.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The existing vehicle-mounted speakers affect hearing perception due to uneven position distribution and interference caused by electromagnetic induction, and form an unsightly speaker grid inside the vehicle.
Using electrostatic speakers, by coating electrostatic charges on the surface of the performance layer and embedded in the laminated glass, the electric field changes generate vibration and propagate sound, solving the problem of uneven position distribution, and improving the auditory feeling through the design of laminated glass. Use sound insulation and ugliness layers to improve aesthetics and sound insulation performance.
It improves auditory feeling, eliminates the problem of uneven position distribution, improves the aesthetics and sound insulation performance of the sound glass, avoids electromagnetic induction interference from traditional speakers, and provides a clearer audio experience.
Smart Images
Figure CN222170008U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of vehicle glass, in particular to an electrostatic loudspeaker and sound-generating glass. Background Art
[0002] Conventional car speakers generate mechanical vibrations to push the surrounding air, and the air acts as a medium to generate fluctuations, thereby achieving the conversion of "electricity-force-sound". Most existing conventional car speakers are electric speakers. The host in the audio system converts the digital signal of the music software into a corresponding electrical signal, which is then transmitted to the speaker; when the coil in the speaker passes through an alternating current, the coil cuts the magnetic field lines and the coil moves, which drives the eardrum to vibrate, and the vibration of the eardrum will compress or stretch the air, thereby transmitting sound waves.
[0003] Such car speakers are usually distributed in the front and back or left and right directions inside the vehicle, so the direction of the speakers is not in a frontal symmetrical position, so the speakers will produce complex frequencies, such as long reverberation time, reflective time difference of sound waves, etc. In addition, the existing car speakers will generate electric potential due to electromagnetic induction, and then generate electrical signals that interfere with the sound, affecting the auditory experience. In addition, in order to spread the sound, the existing car speakers will form a speaker grid inside the vehicle, affecting the aesthetics. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide an electrostatic speaker and a sound-generating glass to improve the auditory experience.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0006] An electrostatic speaker comprises a first electrode, a performance layer and a second electrode which are stacked in sequence;
[0007] The surface of the performance layer is coated with an electrostatic charge;
[0008] The first electrode or the second electrode is provided with a through hole for propagating the amplitude of the performance layer.
[0009] Further, it also includes a joint;
[0010] The first electrode and the second electrode are electrically connected to one of the connectors respectively.
[0011] Furthermore, the performance layer has a thickness of 0.01 mm to 0.05 mm.
[0012] In order to solve the above technical problems, another technical solution adopted by the utility model is:
[0013] A sound-generating glass, comprising an outer glass plate, a first adhesive layer, an inner glass plate and any one of the above-mentioned electrostatic speakers;
[0014] The outer glass plate, the first adhesive layer and the inner glass plate are stacked in sequence to form a laminated glass;
[0015] The electrostatic speaker is disposed in the laminated glass, and at least a portion of the electrostatic speaker is embedded in the first adhesive layer.
[0016] Furthermore, it also includes a second adhesive layer sandwiched between the inner glass plate and the first adhesive layer.
[0017] Furthermore, the thickness of the second adhesive layer is 0.2 mm to 0.5 mm.
[0018] Furthermore, a sound-permeable hole is provided on the layered structure formed by the inner glass plate and the second adhesive layer;
[0019] In the thickness direction of the sound-emitting glass, the projection area of the sound-transmitting hole is located on the protective layer of the electrostatic speaker.
[0020] Furthermore, a protective cover is provided on a side of the sound-permeable hole away from the outer glass plate.
[0021] Furthermore, a sound insulation layer is sandwiched between the outer glass plate and the first adhesive layer.
[0022] Furthermore, the thickness of the sound insulation layer is 0.5 mm to 1 mm.
[0023] Furthermore, the outer glass plate is semi-tempered glass, and the inner glass plate is aluminosilicate glass or semi-tempered glass.
[0024] Furthermore, when the material of the inner glass plate is aluminosilicate glass, the thickness of the inner glass plate is 0.5 mm to 1 mm.
[0025] Furthermore, the area of the laminated glass connected to the electrostatic speaker is coated with a concealing layer.
[0026] The beneficial effect of the utility model is that the electrostatic speaker in the utility model is coated with static charge on the surface of the performance layer and the performance layer is sandwiched between the first electrode and the second electrode. When the first electrode and the second electrode receive an external electrical signal, the electric field changes. Since the surface of the performance layer is coated with static charge, the performance layer will vibrate and produce sound under the change of the electric field, and the sound generated is transmitted outward through the through hole on the first electrode or the second electrode. When this type of electrostatic speaker is installed in laminated glass, it can make the glass have the ability to make sound. The installation position of vehicle glass is usually set towards the head of the passenger. Therefore, by installing the electrostatic speaker in the laminated glass, the laminated glass has the ability to make sound, so as to solve the problem of uneven position distribution of existing vehicle speakers and improve the auditory experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic diagram of the structure of the sound-emitting glass in the first embodiment of the utility model;
[0028] Figure 2 It is a partial cross-sectional view of the sound-emitting glass in the first embodiment of the utility model;
[0029] Figure 3 This is a schematic diagram of the structure of the sound-emitting glass in the second embodiment of the utility model;
[0030] Figure 4 It is a partial cross-sectional view of the sound-emitting glass in the second embodiment of the present utility model.
[0031] Description of labels:
[0032] 1. Outer glass plate; 2. First bonding layer; 3. Inner glass plate; 10. Laminated glass;
[0033] 4. Electrostatic speaker; 41. First electrode; 42. Performance layer; 43. Second electrode; 44. Connector; 45. Protective layer;
[0034] 5. Second bonding layer; 6. Sound-permeable hole; 7. Protective cover; 8. Sound insulation layer; 9. Umbellishment layer. DETAILED DESCRIPTION
[0035] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.
[0036] Please refer to Figure 1-Figure 4A sound-generating glass comprises an outer glass plate 1, a first adhesive layer 2, an inner glass plate 3 and an electrostatic speaker 4; the electrostatic speaker 4 comprises a first electrode 41, a performance layer 42 and a second electrode 43 which are stacked in sequence; the surface of the performance layer 42 is coated with electrostatic charge; the first electrode 41 or the second electrode 43 is provided with a through hole for transmitting the amplitude of the performance layer 42; the outer glass plate 1, the first adhesive layer 2 and the inner glass plate 3 are stacked in sequence to form a laminated glass 10; the electrostatic speaker 4 is arranged in the laminated glass 10, and at least part of the electrostatic speaker 4 is embedded in the first adhesive layer 2. Among them, the electrostatic charge coated on the surface of the performance layer 42 should be a charge of the same polarity. Optionally, a plurality of electrostatic speakers 4 are arranged on one side of the laminated glass 10, or the same number of electrostatic speakers 4 are respectively arranged on the two opposite sides of the laminated glass 10, and the electrostatic speakers 4 are symmetrically arranged. The setting position and the number of the electrostatic speakers 4 depend on the installation position of the sound-generating glass.
[0037] It can be understood that the electrostatic speaker 4 in the present invention is formed by coating the surface of the performance layer 42 with static charge and sandwiching the performance layer 42 between the first electrode 41 and the second electrode 43. When the first electrode 41 and the second electrode 43 receive an external electrical signal, an electric field change occurs. Since the surface of the performance layer 42 is coated with static charge, the performance layer 42 will vibrate and generate sound under the change of the electric field, and the generated sound is transmitted outward through the through holes on the first electrode 41 or the second electrode 43. When this type of electrostatic speaker 4 is installed in the laminated glass 10, it can make the glass have the ability to make sound. The installation position of the vehicle glass is usually set towards the head of the passenger. Therefore, by installing the electrostatic speaker 4 in the laminated glass 10, the glass has the ability to make sound, so as to solve the problem of uneven distribution of the positions of the existing vehicle speakers and improve the auditory experience.
[0038] In some embodiments, the electrostatic speaker 4 further includes a connector 44 and a protective layer 45; the first electrode 41 and the second electrode 43 are electrically connected to a connector 44 respectively; the protective layer 45 covers the side of the first electrode 41 or the second electrode 43 away from the performance layer 42. The connector 44 is configured to be electrically connected to an external driver for electrical signal transmission, thereby enabling the first electrode 41 and the second electrode 43 to change the electric field, thereby driving the performance layer 42 to vibrate and realize electrical sound conversion.
[0039] Among them, the first electrode 41 and the second electrode 43 are both capacitor plates. The first electrode 41 and the second electrode 43 are electrically connected to the external amplifier through the connector 44. The amplifier converts the audio signal into an electrical signal and transmits it to the first electrode 41 and the second electrode 43. The first electrode 41 and the second motor respectively generate high voltages with opposite polarities but the same intensity through the booster, thereby driving the performance layer 42 to vibrate.
[0040] In some embodiments, the performance layer 42 has a thickness of 0.01 mm to 0.05 mm. The performance layer 42 within this thickness range can have a good vibration amplitude to ensure the sound effect. The thickness of the performance layer 42 is only 1 / 100 of the thickness of the traditional speaker diaphragm. The thickness of the performance layer 42 can eliminate the phase difference and loudness difference generated during the vibration of the traditional speaker diaphragm and improve the sound effect of the speaker. Preferably, the thickness of the performance layer 42 is 0.02 mm, 0.03 mm or 0.04 mm.
[0041] In some embodiments, the outer glass plate 1 is semi-tempered glass, and the inner glass plate 3 is silicon-aluminum glass or semi-tempered glass. Optionally, one combination is that the outer glass plate 1 and the inner glass plate 3 are both semi-tempered glass; another combination is that the outer glass plate 1 is semi-tempered glass, and the inner glass plate 3 is silicon-aluminum glass. In this case, the thickness of the inner glass plate 3 is 0.5mm-1mm. Optionally, the thickness of the inner glass plate 3 is 0.6, 0.65, 0.68mm, 0.69mm, 0.7mm, 0.71mm, 0.72mm, 0.73mm, 0.75mm, 0.8 mm, 0.85mm, 0.9mm or 0.95mm, when the inner glass plate 3 is silicon aluminum glass and its thickness is within the above range, the inner glass plate 3 is used to act as a diaphragm, and the electrostatic speaker 4 as a whole is used as a sound source to expand the sound area and improve the sound effect. In addition, with the inner glass plate 3 as the diaphragm, there is no need to drill sound holes 6 on the surface of the inner glass, which improves the overall sealing of the sound-emitting glass, is more suitable for use in a humid climate environment, and extends the service life of the electrostatic speaker 4.
[0042] In some embodiments, the sound-emitting glass also includes a second adhesive layer 5 sandwiched between the inner glass plate 3 and the first adhesive layer 2. Since the electrostatic speaker 4 is embedded in the first adhesive layer 2, the bonding area between the first adhesive layer 2 and the inner glass plate 3 is reduced, which affects the connection strength between the inner glass plate 3 and the first adhesive layer 2, and further affects the connection strength between the inner glass plate 3 and the outer glass plate 1. The provision of the second adhesive layer 5 can improve the connection strength between the inner glass plate 3 and the first adhesive layer 2.
[0043] In some embodiments, the thickness of the second adhesive layer 5 is 0.2 mm to 0.5 mm. Preferably, the thickness of the second adhesive layer 5 is 0.2 mm, 0.25 mm, 0.3 mm, 0.36 mm, 0.37 mm, 0.38 mm, 0.39 mm, 0.4 mm, 0.45 mm or 0.48 mm.
[0044] In some embodiments, when the outer glass plate 1 and the inner glass plate 3 are both semi-tempered glass, a sound-permeable hole 6 is provided on the layered structure formed by the inner glass plate 3 and the second adhesive layer 5; in the thickness direction of the sound-emitting glass, the projection area of the sound-permeable hole 6 is located on the first electrode 41 of the electrostatic speaker 4, so that the performance layer 42 vibrates and the generated sound is transmitted into the vehicle through the sound-permeable hole 6.
[0045] In some embodiments, a protective cover 7 is provided on one side of the sound-transmitting hole 6 away from the outer glass plate 1 . The protective cover 7 is used to protect the electrostatic speaker 4 .
[0046] In some embodiments, a sound insulation layer 8 is sandwiched between the outer glass plate 1 and the first adhesive layer 2 to block the sound generated by the electrostatic speaker 4 from propagating to the outside, thereby improving the sound insulation performance of the vehicle.
[0047] In some embodiments, the thickness of the sound insulation layer 8 is 0.5 mm to 1 mm. If the sound insulation layer 8 is too thin, it cannot play a good sound insulation role. If the sound insulation layer 8 is too thick, the thickness and weight of the whole sound-emitting glass will increase. Therefore, the sound insulation layer 8 within the above thickness range can ensure the sound insulation performance and make the thickness of the sound-emitting glass thinner. Preferably, the material of the sound insulation layer 8 is PVB, and its thickness is 0.55 mm, 0.6 mm, 0.7 mm, 0.74 mm, 0.75 mm, 0.76 mm, 0.77 mm, 0.78 mm, 0.8 mm, 0.85 mm, 0.9 mm or 0.95 mm.
[0048] In some embodiments, the area on the laminated glass 10 connected to the electrostatic speaker 4 is coated with a masking layer 9 for shielding the electrostatic speaker 4 on the outer surface of the glass, thereby improving the aesthetics and replacing the traditional vehicle-mounted speaker.
[0049] Figure 1 and Figure 2 , Embodiment 1 of the present utility model is:
[0050] A sound-generating glass comprises an outer glass plate 1, a first adhesive layer 2, an inner glass plate 3, a second adhesive layer 5, a sound insulation layer 8 and an electrostatic speaker 4; the outer glass plate 1, the first adhesive layer 2 and the inner glass plate 3 are stacked in sequence to form a laminated glass 10; an equal number of electrostatic speakers 4 are arranged on two opposite sides of the laminated glass 10; the electrostatic speaker 4 comprises a joint 44 and a first electrode 41, a performance layer 42 and a second electrode 43 which are stacked in sequence; the surface of the performance layer 42 is coated with static charge, and the first electrode 41 is provided with a through hole for transmitting the amplitude of the performance layer 42; the first electrode 41 and the second electrode 43 are electrically connected to a joint 44 respectively; only a part of the joint 44 of the electrostatic speaker 4 is located outside the sound-generating glass, and the rest of the electrostatic speaker 4 is sandwiched between the outer glass plate 1 and the inner glass plate 3. Specifically, the two joints 44 are respectively connected to the two sides of the first adhesive layer 2 , the joint 44 connected to the first electrode 41 is sandwiched between the first adhesive layer 2 and the second adhesive layer 5 , and the joint 44 connected to the second electrode is sandwiched between the sound insulation layer 8 and the first electrode 41 .
[0051] In this embodiment, the outer glass plate 1 and the inner glass plate 3 are both semi-tempered glass, and the thickness of the outer glass plate 1 and the inner glass plate 3 are both 2.1 mm. In addition, the thickness of the performance layer 42 is 0.3 mm, and the performance layer 42 is a high-impedance diaphragm; the material of the first adhesive layer 2 and the second adhesive layer 5 are both PVB, and the thickness of the first adhesive layer 2 and the second adhesive layer 5 are both 0.38 mm; the thickness of the sound insulation layer 8 is 0.76 mm, and the material of the sound insulation layer 8 is PVB; the material of the protective layer 45 is PET.
[0052] In this embodiment, a sound-transmitting hole 6 is provided on the layered structure formed by the inner glass plate 3 and the second adhesive layer 5; in the thickness direction of the sound-emitting glass, the projection area of the sound-transmitting hole 6 is located on the first electrode 41 of the electrostatic speaker 4; and a protective cover 7 is provided on the side of the sound-transmitting hole 6 away from the outer glass plate 1.
[0053] In this embodiment, the area of the laminated glass 10 connected to the electrostatic speaker 4 is coated with a concealing layer 9. Specifically, the concealing layer is black ink.
[0054] The manufacturing process of the sound-emitting glass in this embodiment is as follows:
[0055] S1: welding the electrostatic speaker 4 to the sound insulation layer 8;
[0056] S2: Drill holes on the surfaces of the first adhesive layer 2, the second adhesive layer 5 and the inner glass plate 3 and attach a protective layer 45 to the surface of the first electrode 41;
[0057] S3: In the high-pressure vacuuming step of laminating, the opening position of the inner glass plate 3 is first vacuumed by low pressure, and the portion other than the opening region of the inner glass plate 3 is vacuumed by high pressure during the high-pressure vacuuming process, wherein the protective layer 45 is mainly used to protect the performance layer 42 during the high-pressure vacuuming process;
[0058] S4: After the inner glass plate 3 and the outer glass plate 1 are joined together, the protective layer 45 is removed and the protective cover 7 is installed.
[0059] Figure 3 and Figure 4 , Embodiment 2 of the present utility model is:
[0060] A sound-generating glass comprises an outer glass plate 1, a first adhesive layer 2, an inner glass plate 3, a second adhesive layer 5, a sound insulation layer 8 and an electrostatic speaker 4; the outer glass plate 1, the first adhesive layer 2 and the inner glass plate 3 are stacked in sequence to form a laminated glass 10; the electrostatic speaker 4 is arranged on one side 4 of the laminated glass 10, and a plurality of electrostatic speakers 4 are arranged; the electrostatic speaker 4 comprises a joint 44 and a first electrode 41, a performance layer 42 and a second electrode 43 stacked in sequence; the surface of the performance layer 42 is coated with static charge, and the first electrode 41 is provided with a through hole for transmitting the amplitude of the performance layer 42; the first electrode 41 and the second electrode 43 are electrically connected to a joint 44 respectively; only a part of the joint 44 of the electrostatic speaker 4 is located outside the sound-generating glass, and the rest of the electrostatic speaker 4 is sandwiched between the outer glass plate 1 and the inner glass plate 3. Specifically, the two joints 44 are respectively connected to the two sides of the first adhesive layer 2 , the joint 44 connected to the first electrode 41 is sandwiched between the first adhesive layer 2 and the second adhesive layer 5 , and the joint 44 connected to the second motor is sandwiched between the sound insulation layer 8 and the first electrode 41 .
[0061] In this embodiment, the outer glass plate 1 is semi-tempered glass, and the inner glass plate 3 is silicon-aluminum glass, and the thickness of the outer glass plate 1 is 2.1 mm, and the thickness of the inner glass plate 3 is 0.7 mm. In addition, the thickness of the performance layer 42 is 0.3 mm, and the performance layer 42 is a high-impedance diaphragm; the material of the first adhesive layer 2 and the second adhesive layer 5 are both PVB, and the thickness of the first adhesive layer 2 and the second adhesive layer 5 are both 0.38 mm; the thickness of the sound insulation layer 8 is 0.76 mm, and the material of the sound insulation layer 8 is PVB; the material of the protective layer 45 is PET.
[0062] In this embodiment, the area of the laminated glass 10 connected to the electrostatic speaker 4 is coated with a concealing layer 9. Specifically, the concealing layer is black ink.
[0063] The manufacturing process of the sound-emitting glass in this embodiment is as follows:
[0064] S1: welding the electrostatic speaker 4 to the sound insulation layer 8;
[0065] S2: opening a hole in the first adhesive layer 2 to accommodate the electrostatic speaker 4;
[0066] S3: High-pressure vacuuming.
[0067] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.
Claims
1. An electrostatic speaker, characterized in that: It includes a first electrode, a performance layer and a second electrode which are stacked in sequence; The surface of the performance layer is coated with an electrostatic charge; The first electrode or the second electrode is provided with a through hole for propagating the amplitude of the performance layer.
2. An electrostatic speaker according to claim 1, characterized in that: Also includes connectors; The first electrode and the second electrode are electrically connected to one of the connectors respectively.
3. The electrostatic speaker according to claim 1, characterized in that: The performance layer has a thickness of 0.01 mm to 0.05 mm.
4. A sound-generating glass, characterized in that: It comprises an outer glass plate, a first adhesive layer, an inner glass plate and an electrostatic speaker as claimed in any one of claims 1 to 3; The outer glass plate, the first adhesive layer and the inner glass plate are stacked in sequence to form a laminated glass; The electrostatic speaker is disposed in the laminated glass, and at least a portion of the electrostatic speaker is embedded in the first adhesive layer.
5. The sound-emitting glass according to claim 4, characterized in that: The invention also includes a second adhesive layer sandwiched between the inner glass plate and the first adhesive layer.
6. The sound-emitting glass according to claim 5, characterized in that: The thickness of the second adhesive layer is 0.2 mm to 0.5 mm.
7. The sound-emitting glass according to claim 5, characterized in that: The layered structure formed by the inner glass plate and the second adhesive layer is provided with sound-transmitting holes; In the thickness direction of the sound-emitting glass, the projection area of the sound-transmitting hole is located on the first electrode or the second electrode of the electrostatic speaker.
8. The sound-emitting glass according to claim 7, characterized in that: A protective cover is provided on one side of the sound-transmitting hole away from the outer glass plate.
9. The sound-emitting glass according to claim 4, characterized in that: A sound insulation layer is sandwiched between the outer glass plate and the first adhesive layer.
10. The sound-emitting glass according to claim 9, characterized in that: The thickness of the sound insulation layer is 0.5 mm to 1 mm.
11. The sound-emitting glass according to claim 4, characterized in that: The outer glass plate is semi-tempered glass, and the inner glass plate is silicon-aluminum glass or semi-tempered glass.
12. The sound-emitting glass according to claim 4 or 11, characterized in that: When the material of the inner glass plate is aluminosilicate glass, the thickness of the inner glass plate is 0.5 mm to 1 mm.
13. The sound-emitting glass according to claim 4, characterized in that: The area on the laminated glass connected to the electrostatic speaker is coated with a concealing layer.