WO2022062866A1 - 发声屏幕以及投影电视 - Google Patents

发声屏幕以及投影电视 Download PDF

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Publication number
WO2022062866A1
WO2022062866A1 PCT/CN2021/116102 CN2021116102W WO2022062866A1 WO 2022062866 A1 WO2022062866 A1 WO 2022062866A1 CN 2021116102 W CN2021116102 W CN 2021116102W WO 2022062866 A1 WO2022062866 A1 WO 2022062866A1
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WO
WIPO (PCT)
Prior art keywords
sound
layer
emitting
screen
magnetic
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Application number
PCT/CN2021/116102
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English (en)
French (fr)
Inventor
邢哲
徐虹哲
Original Assignee
青岛海信激光显示股份有限公司
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Application filed by 青岛海信激光显示股份有限公司 filed Critical 青岛海信激光显示股份有限公司
Priority to CN202180064345.1A priority Critical patent/CN116235489A/zh
Publication of WO2022062866A1 publication Critical patent/WO2022062866A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present application relates to the field of audio and video equipment, and in particular, to a sound-emitting screen and a projection TV.
  • a sound-emitting screen is a screen that can emit sound. It can emit sound as a sound while displaying a picture, and the user experience is better.
  • the sound-emitting screen generally includes a display function layer and a sound-emitting structure located on the back of the display function layer (that is, the side that does not carry an image screen).
  • the electromagnetic speaker includes a magnetic unit and a voice coil around the magnetic unit. When the voice coil is energized, the control current signal can make the voice coil reciprocate in the magnetic field of the magnetic unit, and at the same time drive the substrate to vibrate and radiate sound waves.
  • the sound-emitting structure layer includes a magnetic layer and a voice coil, the voice coil is located on the magnetic layer, and the magnetic layer has an anisotropic magnetic field.
  • Some embodiments of the present application provide a projection television, including a projector and the above-mentioned sound-emitting screen, where the projector is used to project an image picture onto a display function layer of the sound-emitting screen.
  • Fig. 1 is the structural representation of a kind of sounding screen
  • FIG. 2 is a schematic structural diagram of a sound-emitting screen provided by some embodiments of the present application.
  • Fig. 3 is the top view of the sounding screen shown in Fig. 2;
  • FIG. 4 is a schematic structural diagram of another sound-emitting screen provided by some embodiments of the present application.
  • FIG. 5 is a schematic structural diagram of another sound-emitting screen provided by some embodiments of the present application.
  • FIG. 6 is a schematic diagram of a magnetic layer in some embodiments of the present application.
  • Fig. 7 is the top view of the sounding screen shown in Fig. 4;
  • Fig. 8 is a top view of an auxiliary sound-emitting layer in the sound-emitting screen shown in Fig. 4;
  • FIG. 9 is a schematic structural diagram of a first skin of another auxiliary sound-emitting layer in some embodiments of the present application.
  • FIG. 10 is a schematic structural diagram of a first skin of another auxiliary sound-emitting layer in some embodiments of the present application.
  • FIG. 11 is a schematic structural diagram of a first skin of another auxiliary sound-emitting layer in some embodiments of the present application.
  • FIG. 12 is a schematic structural diagram of another sound-emitting screen provided by some embodiments of the present application.
  • Fig. 13 is a top view of an auxiliary sound-emitting layer in the sound-emitting screen shown in Fig. 12;
  • FIG. 14 is a top view of another auxiliary sound-emitting layer provided by some embodiments of the present application.
  • FIG. 15 is a top view of another auxiliary sound-emitting layer provided by some embodiments of the present application.
  • 16 is a schematic structural diagram of a projection television provided by some embodiments of the present application.
  • FIG. 17 is a right side view of the projection television shown in FIG. 16 .
  • a sounding screen is a screen capable of sounding.
  • FIG. 1 it is a schematic structural diagram of a sounding screen.
  • the sound-emitting screen 10 includes a screen, an auxiliary sound-emitting panel, an electromagnetic speaker, a frame and a back panel. Because the structure of the electromagnetic speaker is relatively complex and the thickness is large, the electromagnetic speaker needs to be fixed on the structure composed of the auxiliary sounding board and the screen by means of the back plate, the frame and the screen, which leads to the complex structure of the entire sounding screen and the thickness. will be larger.
  • Another sound-emitting screen includes a flat-panel sound generator
  • the flat-plate sound generator includes a base plate and a plurality of magnets (such as magnets) located on the base plate, and a voice coil is arranged around each magnet.
  • the thickness of this structure is thinner.
  • the structure formed by the magnet and its surrounding voice coil occupies a large area, which is not conducive to the miniaturization of the sound-emitting structure.
  • the thickness of the magnet may also be relatively thick.
  • FIG. 2 is a schematic structural diagram of a sound-emitting screen provided by an embodiment of the present application.
  • the sound-emitting screen 20 includes a display function layer 21 and a sound generation structure layer 22 located on one side of the display function layer 21 .
  • the sound-emitting structure layer 22 includes a magnetic layer 221 and a voice coil 222, the voice coil 222 is located on the magnetic layer 221, and the magnetic layer 221 has an anisotropic magnetic field.
  • the voice coil 222 is located on the magnetic layer 221.
  • the voice coil 222 can cut the magnetic field lines of the magnetic layer 221, and carry out Vibration, which in turn drives the magnetic layer to vibrate to produce sound.
  • the embodiment of the present application provides a sound-emitting screen.
  • the sound-emitting screen has a sound-emitting structure composed of a magnetic layer and a voice coil on the magnetic layer. Audio signals are connected to the voice coil. Under the action of the magnetic field, the magnetic layer is driven to vibrate, and then the sound is produced. Because the sound-emitting structure composed of the magnetic layer and the voice coil has a simple structure and a thin thickness, the thickness of the sound-emitting screen will be correspondingly thinner, which solves the problem of sound in the related art. The thickness of the screen is thicker, which achieves the effect of reducing the thickness of the sound-emitting screen.
  • the voice coil can be arranged at any position on the magnetic layer, and the function of producing sound can be realized. Further, miniaturization of the sound-emitting structure layer can be achieved by setting the size of the sound-emitting structure layer including the magnetic layer and the voice coil to be small. And compared with the flat-panel sounder in the related art, the thickness of the magnetic layer is much smaller than the thickness of the magnet, and the thickness of the sound-emitting structure layer in the sound-emitting screen provided by the embodiment of the present application may also be smaller than the thickness of the flat-panel sounder in the related art. .
  • FIG. 4 is a schematic structural diagram of another sound-emitting screen provided by some embodiments of the present application.
  • the sound-emitting screen 20 is adjusted on the basis of the sound-emitting screen shown in FIG. 2 .
  • the sound-emitting screen 20 further includes an auxiliary sound-emitting layer 23 , and the auxiliary sound-emitting layer 23 is located between the sound-emitting structure layer 22 and the display function layer 21 .
  • the auxiliary sound-emitting layer 23 includes an intermediate layer 231 and skins on both sides of the intermediate layer (including the auxiliary sound-emitting layer 232a on the side away from the display function layer 21 , and the auxiliary sound-emitting layer close to the display function layer 21 . 232b on the side).
  • the intermediate layer 231 includes a plurality of honeycomb cavities arranged in an array, and each cavity has the same volume.
  • the skin 232 is a whole-layer film structure.
  • the vibration emitted by the sound-emitting structure layer 22 drives the gas in the cavity to vibrate, which in turn drives the entire skin to vibrate to generate sound waves and emit sound.
  • the auxiliary sound-generating layer can assist the sound-generating structure layer 22 to generate sound and improve the sound effect.
  • FIG. 5 is a schematic structural diagram of another sound-emitting screen provided in the embodiment of the present application.
  • the first skin on the side of the auxiliary sound emitting layer 23 close to the sound emitting structure layer and the magnetic layer 221 are integrally formed. That is, the same structural layer can be used as the first skin and the magnetic layer. In this way, the structure of the sound-emitting screen can be simplified, and the thickness of the sound-emitting screen can be reduced.
  • the structure of the magnetic layer includes the following two:
  • the first type the magnetic layer is a magnetic fiberboard, and the magnetic fiberboard is woven from magnetic fibers.
  • the magnetic fiberboard can be used as both the magnetic layer and the skin of the auxiliary sound-emitting layer.
  • FIG. 6 which is a schematic diagram of a magnetic fiber board as the magnetic layer 221 , the magnetic fiber board is woven from a plurality of magnetic fibers that are crisscrossed.
  • the magnetic field direction of each magnetic fiber may be parallel to the axial direction of the magnetic fiber.
  • the magnetic layer includes a substrate and a magnetic coating on the substrate.
  • the substrate is the skin of the auxiliary sound-emitting layer.
  • the first skin includes at least two sub-skins located in different regions of the intermediate layer, and the at least two sub-skins of the first skin include two sub-skins with different magnetic field intensities, such a structure
  • the voice coils on the sub-skins in different areas will also generate vibrations of different intensities and frequencies under the magnetic fields of different intensities, and then emit sound waves of different intensities and frequencies, so that the sound-emitting screen can simultaneously emit sounds of different intensities and tones , greatly improves the sound effect, and the user experience is better.
  • the first skin may include two regions, and sub-skins in the two regions may be used to emit high-frequency sounds and low-frequency sounds, respectively, or the first skin may include three regions, the three The sub-skins in the area can be used to emit high-frequency sounds, mid-frequency sounds, and low-frequency sounds respectively, which can greatly improve the layering of the sound emitted by the sounding screen, making the sound effect of the sounding screen better.
  • the areas of the two sub-skins with different magnetic field intensities are equal, so that the sound intensity and frequency of the sub-skins in different areas can be easily controlled.
  • At least two sub-skins of the first skin include two sub-skins with different materials.
  • the material of the sub-skin in the first skin includes at least two of glass fiber, carbon fiber, aluminum alloy, aluminum metal, polyimide and polycarbonate.
  • FIG. 7 it is a top view of the sounding screen shown in FIG. 4 (or FIG. 5 ). It can be seen that the first skin includes sub-skins 1a and 1b, and the sub-skins 1a and 1b are made of two different materials. Voice coils 222 are provided on the sub-skins 1a and 1b, respectively.
  • stiffness refers to the ability of a material or structure to resist elastic deformation when subjected to force
  • density a measure of density
  • the skin on one side of the auxiliary sound-emitting layer includes at least two sub-skins with different materials. Different areas of the auxiliary sound-emitting layer can emit sounds of different tones, so that the sound emitted by the sound-emitting screen has a stronger sense of hierarchy and better sound effects.
  • FIG. 8 it is a top view of an auxiliary sound-emitting layer in the sound-emitting screen shown in FIG. 4 .
  • the auxiliary sound-emitting layer 23 further includes an isolation strip 1x located on the side of the intermediate layer 231 away from the display function layer 21, and the isolation strip 1x is located between the two sub-skins (1a and 1b) in the first skin.
  • the isolation belt is located between any two sub-skins in the first skin to separate any two sub-skins in the first skin.
  • the isolation belt 1x separates the sub-skins, avoiding direct contact between the sub-skins, thereby avoiding the direct conduction of vibrations between the sub-skins, and further improving the sound quality emitted by the sound-emitting screen. The layering of the sound.
  • Fig. 8 shows the case where the isolation belt 1x is located between the sub-skin 1a and the sub-skin 1b, but the isolation belt 1x can also be located between any two sub-skins of the first skin.
  • the application embodiments do not limit this.
  • the material of the insulating strip 1x is different from the material of the first skin. That is, the isolation belt 1x may be made of a material different from that of any sub-skin in the first skin, so that the isolation effect of the isolation belt 1x on vibrations in the sub-skin can be improved.
  • the isolation belt 1x is made of a vibration-absorbing material, for example, a high-polymer vibration-absorbing material, so that the vibrations of different sub-skins can be conducted to each other.
  • the insulating strip 1x is bonded to the two sub-skins. That is, the isolation belt 1x can be connected with the sub-skin by means of bonding.
  • the width of the isolation belt 1x may be slightly larger (eg, 1-5 mm larger) than the width of the spaced area between the two sub-skins, the sub-skins may be laid on the intermediate layer first, and then the sub-skins may be laid on the intermediate layer.
  • the isolation tape 1x covers the spaced area, and the edge of the isolation tape 1x can be covered on the sub-skin and bonded with the sub-skin.
  • an isolation zone may not be set between the two sub-skins, but there is only one spaced area, which is not limited in this embodiment of the present application.
  • the number of sub-skins is 4, and the shapes of the sub-skins are all triangles or rectangles.
  • FIG. 9 is a schematic structural diagram of the first skin 232a of another auxiliary sound-emitting layer in the embodiment of the present application. It shows the case where the four sub-skins 1a, 1b, 1c, and 1d are all rectangular, separated by a crossing separation band 1x.
  • FIG. 10 is a schematic structural diagram of the first skin 232 a of another auxiliary sound emitting layer in some embodiments of the present application. It shows the case where the four sub-skins 1a, 1b, 1c, and 1d are all triangular, separated by a crossing separation band 1x.
  • the number, shape and arrangement of the sub-skins of the skins on both sides of the auxiliary sound-emitting layer can also be other, for example, the number of sub-skins can also be 3, 5, 6 , 7 and more, etc., the shape may also include at least one of a pentagon, a hexagon, a rhombus, etc., which is not limited in this embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of the first skin 232a of another auxiliary sound-emitting layer in some embodiments of the present application. It shows the case where three sub-skins 1a, 1b and 1c are all rectangular, separated by two parallel spacer strips 1x.
  • the above shows the structure of the first skin on the side of the auxiliary sound-emitting layer away from the display function layer
  • the structure of the second skin on the side of the auxiliary sound-emitting layer close to the display function layer can refer to the first skin
  • the second skin may not be magnetic.
  • the voice coil may also be of other structures, such as a circular helical structure, Or a double helix structure, etc., which are not limited in the embodiments of the present application.
  • FIG. 12 is a schematic structural diagram of another sound-emitting screen provided by some embodiments of the present application.
  • the middle layer 231 has a plurality of through holes arranged in an array, and the plurality of through holes and the skins on both sides of the middle layer form a plurality of cavities (for example, q1 and q2 in FIG. 12 ).
  • the auxiliary sound-emitting layer has at least two sound-emitting regions, and each sound-emitting region is arranged with a plurality of cavities. In the at least two sound-emitting regions, the volume of the first cavity q1 of the first sound-emitting region a1 and the volume of the second sound-emitting region a2 are The volumes of the second cavities q2 are different.
  • the dimensions of the first cavity q1 and the second cavity q2 in the thickness direction f1 of the auxiliary sound emitting layer 221 are the same. In this way, the manufacturing difficulty of the cavity can be reduced, and the manufacturing rate of the auxiliary sound-emitting layer can be improved.
  • the volume of the cavities in different regions can be adjusted by adjusting the shapes and sizes of the cavities in different regions.
  • FIG. 13 which is a top view of an auxiliary sound-emitting layer 23 in the sound-emitting screen shown in FIG. 12 .
  • the areas of the first section m1 of the first cavity q1 cut by the first plane and the second section m2 of the second cavity q2 cut by the first plane are different, and the first plane is any one parallel to the auxiliary sound-emitting layer 23 noodle.
  • the different areas can include three cases, the first case: the shape of the first section and the second section are the same, but the size is different; the second case: the shape of the first section and the second section are different, but the same size (The size when the shapes are different may refer to the maximum width of the two shapes); the third case: the shapes and sizes of the first section and the second section are different.
  • the areas and shapes of the multiple first cavities q1 in the first sound-emitting area a1 are the same, and the areas and shapes of the multiple second cavities q2 in the second sound-emitting area a2 are the same.
  • the size of the first cavity q1 in the area a1 is larger than the size of the second cavity q2 in the second sound emitting area a2.
  • the shapes of the first section m1 and the second section m2 include any two of a rectangle, a circle, a hexagonal star, a triangle, a pentagon and a hexagon.
  • FIG. 14 it shows a top view of another auxiliary sound-emitting layer provided by some embodiments of the present application.
  • the auxiliary sound-emitting layer 23 includes four regions, which respectively include cavities with a triangular section, spaced cavities with a rectangular section, hexagonal star-shaped cavities, and a continuous pentagonal interface. Arranged cavities.
  • FIG. 15 it shows a top view of another auxiliary sound-emitting layer provided by some embodiments of the present application.
  • the auxiliary sound emitting layer 23 includes four regions, which respectively include continuously arranged cavities with a triangular cross-section, continuously arranged cavities with a rectangular cross-section, and spaced cavities with a circular cross-section.
  • the arrangement of the plurality of cavities in the auxiliary sound-emitting layer includes various manners.
  • the plurality of cavities may be evenly arranged on the auxiliary sound-emitting layer, or the plurality of cavities may also be arranged. It can be non-uniformly arranged on the auxiliary sound generating layer.
  • the multiple cavities may be arranged on the auxiliary sound-generating layer at intervals, or the multiple cavities may also be closely arranged on the auxiliary sound-generating layer, which is not limited in this embodiment of the present application.
  • the area of the first sound emission area a1 and the area of the second sound emission area a2 are equal. That is, the areas used to emit different tones are equal, so that sounds of different tones can be emitted in a more balanced manner, which further improves the sound effect of the sounding screen.
  • each cavity in the auxiliary sound emitting layer has the same volume.
  • the vibration emitted by the speaker can drive the gas in the cavity to vibrate, which in turn drives the entire auxiliary sounding board to vibrate to produce sound.
  • the sound emitted by the auxiliary sound board is also of the same frequency, which leads to the pitch of the sound emitted by the sound screen (the pitch can refer to the frequency of the sound, the higher the frequency, the higher the pitch , on the contrary, the lower the frequency, the lower the pitch) is too uniform, there is no sense of hierarchy, and the sound effect is poor.
  • the volume of the cavity in the auxiliary sound emitting layer may be different.
  • the frequency of the vibration generated by the cavity will also be different.
  • the larger the volume of the cavity the lower the vibration frequency.
  • the pitch the higher the pitch.
  • the volumes of the cavities in different areas of the auxiliary sound generation layer are different, the tones of the sounds emitted by the different areas will also be different, so that the sound generation screen can emit sounds with different tones, the sound has a higher layered sense, and the sound effect is better. Thereby, the user experience is improved.
  • the auxiliary sound-emitting layer has at least two regions, and then it can emit at least two sounds of different tones.
  • One of the two different-pitched voices can be a higher-pitched voice, and the higher-pitched voice will make the listener feel ethereal, cool, and slender; the other voice can be a lower-pitched voice, a pitched voice
  • the lower sound will give the listener a strong, surging and rough feeling.
  • the embodiment of the present application provides a sound-emitting screen.
  • the sound-emitting screen has a sound-emitting structure composed of a magnetic layer and a voice coil on the magnetic layer.
  • the voice coil can be used in the magnetic field.
  • the magnetic layer is driven to vibrate, and then the sound is produced.
  • the sound-emitting structure composed of the magnetic layer and the voice coil has a simple structure and a thin thickness, the thickness of the sound-emitting screen will be correspondingly thinner, which solves the problem of related technologies.
  • the thickness of the middle sounding screen is thicker, which achieves the effect of reducing the thickness of the sounding screen.
  • the display function layer may be a device with the function of displaying images itself, or may be a device with a screen-like function for carrying an image picture.
  • the display functional layer is a device with its own function of displaying images
  • the display functional layer can be various displays such as a liquid crystal display or a self-luminous display (eg, an organic light emitting diode display).
  • the sound-emitting screen is a multimedia device that integrates two functions of display and sound, and its size will be thinner and lighter, and the user experience will be better.
  • the display functional layer is a device for carrying an image
  • the display functional layer may be composed of a circular Fresnel optical film, a black grid screen or a white plastic screen.
  • the thickness of the display function layer may be between 0.5mm-1.7mm.
  • the projection TV includes a projector 30 and any sound-emitting screen 20 provided in the above-mentioned embodiment.
  • the projector 30 It is used to project the image picture onto the display function layer of the sound-emitting screen 20 .
  • the projector 30 projects the video image F onto the sound-emitting screen 20 .
  • the projector 30 may be a laser projector (Laser Projector).
  • FIG. 17 which is the right side view of the projection TV shown in FIG. 16 .
  • the sound-emitting screen 20 provided by the embodiment of the present application is relatively thin, after the sound-emitting screen 20 is installed on the wall w, the sound is emitted.
  • the distance h1 between the side of the screen 20 far away from the wall w and the wall w is also relatively short. In this case, the sound-emitting screen 20 as a whole fits the wall w, and the visual effect is better.
  • Projection TV is a new type of TV, which organically combines a screen and a projector, and can achieve large-scale high-quality pictures in a small space.
  • the projector 30 is usually arranged as close to the screen as possible.
  • the distance between the projector 30 and the screen is too short, it is difficult for the projector 30 to project an image on the screen, and when the distance between the projector 30 and the screen is too far, a large space is occupied.
  • the projection TV provided by the embodiment of the present application by reducing the overall thickness of the sound-emitting screen 20, further increases the distance h2 between the projector 30 and the sound-emitting screen 20, thus reducing the requirement for the focal length of the projector 30,
  • the projector 30 with a larger focal length can also be applied to the projection television provided by the embodiment of the present application.
  • the distance h1 between the side of the sound-emitting screen 20 away from the wall w and the wall w is also reduced by 10 mm
  • the distance h1 between the projector 30 and the sound-emitting screen 20 is reduced by 10 mm.
  • the distance h2 will be enlarged by 10 mm, which conveniently reduces the focal length requirement of the projector 30 by 10 mm, and greatly reduces the manufacturing cost of the projection TV.
  • the projection TV provided by the embodiment of the present application includes a projector and a sound-emitting screen.
  • the sound-emitting structure layer in the sound-emitting screen includes a magnetic layer and a voice coil. Compared with the sound-emitting structure of an electromagnetic speaker, these two structures can form a thin The sound-emitting structure can further reduce the thickness of the sound-emitting screen, thereby reducing the requirement for the focal length of the projector, so that the projector with a larger focal length can also be used in conjunction with the screen provided by the embodiment of the present application.
  • the term "at least one of A and B" is only an association relationship to describe related objects, indicating that there can be three kinds of relationships, for example, at least one of A and B can indicate that A exists alone, while There are three cases of A and B, and B alone.
  • "at least one of A, B, and C” means that there can be seven kinds of relationships, which can be expressed as: A alone exists, B alone exists, C alone exists, A and B exist simultaneously, A and C exist simultaneously, and both exist C and B, there are seven cases of A, B and C at the same time.
  • At least one of A, B, C, and D means that fifteen kinds of relationships can exist, which can mean: A alone exists, B alone exists, C alone exists, D alone exists, both A and B exist, and at the same time A and C exist, A and D exist simultaneously, C and B exist simultaneously, D and B exist simultaneously, C and D exist simultaneously, A, B, and C exist simultaneously, A, B, and D exist simultaneously, and A and C exist simultaneously and D, B, C, and D exist at the same time, and A, B, C, and D exist at the same time, these fifteen cases.

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  • Physics & Mathematics (AREA)
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Abstract

本申请公开了一种发声屏幕以及投影电视。发声屏幕包括：显示功能层以及发声结构层；所述发声结构层包括磁性层和音圈，所述音圈位于所述磁性层上，且具有各向异性的磁场。该发声屏幕具有磁性层以及磁性层上的音圈构成的发声结构，向音圈中接入音频信号，该音圈即可以在磁性层的磁场的作用下带动磁性层振动，进而发出声音。

Description

发声屏幕以及投影电视
相关申请的交叉引用
本申请要求在2020年09月28日提交的，申请号为202011041206.0中国专利申请的优先权，它们的全部内容通过引用结合在本申请中。
技术领域
本申请涉及音视频设备领域，特别涉及一种发声屏幕以及投影电视。
背景技术
发声屏幕是一种能够发出声音的屏幕，其可以在显示画面的同时，作为音响发出声音，用户体验较好。
发声屏幕一般包括显示功能层以及位于显示功能层背面(即不承载影像画面的一面)的发声结构，该发声结构包括辅助发声层以及设置在辅助发声层远离显示功能层一面上的多个电磁扬声器，电磁扬声器包括磁性单元以及位于磁性单元四周的音圈。当音圈通电时，控制电流信号即可使音圈在磁性单元的磁场中往复运动，同时带动基板进行振动，辐射声波。
发明内容
本申请的一些实施例提供了一种发声屏幕，包括：
显示功能层以及位于所述显示功能层一面的发声结构层；
所述发声结构层包括磁性层和音圈，所述音圈位于所述磁性层上，且所述磁性层具有各向异性的磁场。
本申请的一些实施例提供一种投影电视，包括投影仪以及上述的发声屏幕，所述投影仪用于将影像画面投射到所述发声屏幕的显示功能层上。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是一种发声屏幕的结构示意图；
图2是本申请的一些实施例提供的一种发声屏幕的结构示意图；
图3是图2所示的发声屏幕的俯视图；
图4是本申请的一些实施例提供的另一种发声屏幕的结构示意图；
图5是本申请的一些实施例提供的另一种发声屏幕的结构示意图；
图6是本申请的一些实施例中一种磁性层的示意图；
图7是图4所示的发声屏幕的俯视图；
图8是图4所示的发声屏幕中一种辅助发声层的俯视图；
图9是本申请的一些实施例中另一种辅助发声层的第一蒙皮的结构示意图；
图10是本申请的一些实施例中另一种辅助发声层的第一蒙皮的结构示意图；
图11是本申请的一些实施例中另一种辅助发声层的第一蒙皮的结构示意图；
图12是本申请的一些实施例提供的另一种发声屏幕的结构示意图；
图13是图12所示的发声屏幕中一种辅助发声层的俯视图；
图14是本申请的一些实施例提供的另一种辅助发声层的俯视图；
图15是本申请的一些实施例提供的另一种辅助发声层的俯视图；
图16是本申请的一些实施例提供的一种投影电视的结构示意图；
图17是图16所示的投影电视右视图。
通过上述附图，已示出本申请明确的实施例，后文中将有更详细的描述。这些附图和文字描述并不是为了通过任何方式限制本申请构思的范围，而是通过参考特定实施例为本领域技术人员说明本申请的概念。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
发声屏幕是一种能够发出声音的屏幕，相关技术中，如图1所示，其为一种发声屏幕的结构示意图。该发声屏幕10包括屏幕、辅助发声板、电磁扬声器、边框以及背板。由于电磁扬声器的结构较为复杂，厚度较大，因而需要通过背板、边框以及螺栓的方式将电磁扬声器固定在辅助发声板和屏幕组 成的结构上，进而导致整个发声屏幕的结构较为复杂，厚度也会较大。
另一种发声屏幕中包括平板发声组器，该平板发声器包括基板以及位于基板上的多个磁体(如磁铁)，每个磁体的周围排布有音圈，通过此种结构，也能够实现发声的功能，且相较于电磁扬声器的方案，此种结构的厚度较薄，但是，此种平板发生器中，对于磁体以及音圈的排布具有严格的要求，音圈必须要围绕着磁体来设置，进而由磁体以及其周围的音圈所构成的结构所占用的面积较大，不利于发声结构的小型化，另外，磁体的厚度可能同样较厚。
图2是本申请实施例提供的一种发声屏幕的结构示意图，发声屏幕20包括显示功能层21以及位于显示功能层21一面的发声结构层22。
发声结构层22包括磁性层221和音圈222，音圈222位于磁性层221上，且磁性层221具有各向异性的磁场。
如图3所示，其为图2所示的发声屏幕的俯视图，音圈222位于磁性层221上，当向音圈222加载音频信号时，其可以切割磁性层221的磁感线，并进行振动，进而带动磁性层振动，以发出声音。
综上所述，本申请实施例提供的一种发声屏幕，该发声屏幕具有磁性层以及磁性层上的音圈构成的发声结构，向音圈中接入音频信号，该音圈在磁性层的磁场的作用下带动磁性层振动，进而发出声音，由于磁性层以及音圈构成的发声结构的结构简单，厚度较薄，进而使得发声屏幕的厚度也会相应的较薄，解决了相关技术中发声屏幕的厚度较厚，达到了减薄发声屏幕的厚度的效果。
此外，由于磁性层处具有磁场，因而音圈可以设置在磁性层上的任一位置上，便能够实现发声的功能。进而可以通过设置包括磁性层和音圈的发声结构层的尺寸较小以实现发声结构层的小型化。且相较于相关技术中的平板发声器，该磁性层的厚度远小于磁体的厚度，进而本申请实施例提供的发声屏幕中的发声结构层的厚度也可以小于相关技术中平板发声器的厚度。
图4是本申请的一些实施例提供的另一种发声屏幕的结构示意图，该发声屏幕20在图2所示发声屏幕的基础上进行了一下调整。
在一种可能的实施方式中，发声屏幕20还包括辅助发声层23，辅助发声层23位于发声结构层22和显示功能层21之间。
在一种可能的实施方式中，辅助发声层23包括中间层231以及位于中间 层两面的蒙皮(包括辅助发声层远离显示功能层21一侧的232a，以及辅助发声层靠近显示功能层21一侧的232b)。
其中，中间层231包括阵列排布的多个蜂窝状空腔，每个空腔的体积相同。蒙皮232为整层的膜层结构。
发声结构层22发出的振动带动空腔中的气体振动，进而带动整个蒙皮发生振动，产生声波，发出声音。
辅助发声层可以辅助发声结构层22进行发声，提高声音效果。
在一种可能的实施方式中，如图5所示，其为本申请实施例提供的另一种发声屏幕的结构示意图。其中，辅助发声层23靠近发声结构层一侧的第一蒙皮与磁性层221为一体结构。也即是可以由同一个结构层来作为第一蒙皮以及磁性层。如此可以简化发声屏幕的结构，减薄发声屏幕的厚度。
在此种情况下，示例性的，磁性层的结构包括下面两种：
第一种：磁性层为磁性纤维板，磁性纤维板由具有磁性的纤维编织而成。该磁性纤维板既可以作为磁性层，又可以作为辅助发声层的蒙皮。
如图6所示，其为一种作为磁性层221的磁性纤维板的示意图，磁性纤维板由纵横交错的多条具有磁性的纤维编织而成。每一条磁性纤维的磁场方向可以与磁性纤维的轴向平行。
第二种：磁性层包括基板以及位于基板上的磁性涂层。在一种可能的实施方式中，该基板即为辅助发声层的蒙皮。
在一种可能的实施方式中，第一蒙皮包括位于中间层不同区域的至少两个子蒙皮，第一蒙皮的至少两个子蒙皮中，包括磁场强度不同的两个子蒙皮，如此结构下，不同区域的子蒙皮上的音圈也会在不同强度的磁场下，产生不同强度和频率的振动，进而发出不同强度和频率的声波，如此发声屏幕可以同时发出强度和音调不同的声音，大大提升了声音效果，用户体验较好。例如，第一蒙皮可以包括两个区域，这两个区域中的子蒙皮可以分别用于发出高频的声音和低频的声音，或者，第一蒙皮可以包括三个区域，这三个区域中的子蒙皮可以分别用于发出高频的声音、中频的声音和低频的声音，如此可以在较大程度上提升发声屏幕发出的声音的层次感，使得发声屏幕的音效较好。
在一种可能的实施方式中，磁场强度不同的两个子蒙皮的面积相等，如此可以便于控制不同区域的子蒙皮的发声强度和频率。
在一种可能的实施方式中，第一蒙皮的至少两个子蒙皮中，包括两个材料不同的子蒙皮。第一蒙皮中的子蒙皮的材料包括玻璃纤维、碳纤维、铝合金、铝金属、聚酰亚胺和聚碳酸酯中的至少两种。
如图7所示，其为图4(或者图5)示出的发声屏幕的俯视图。可以看出，第一蒙皮包括子蒙皮1a和1b，子蒙皮1a和子蒙皮1b由两种不同的材料制成。音圈222分别设置在子蒙皮1a和1b上。
需要说明的是，不同的材料，也会具有各自不同的各种物理特性，例如刚度(刚度是指材料或结构在受力时抵抗弹性变形的能力)和密度等。基于这些不同的物理特征，在同样的能量(该能量可以为由发声结构层在音频信号的驱动下所提供的振动能量)的驱动下，也会进行不同频率的振动，进而基于该不同频率的振动，会发出不同频率的声音。
参照本申请实施例提供的发声屏幕，辅助发声层一面上的蒙皮包括材料不同的至少两个子蒙皮，这两个子蒙皮在发声结构层的驱动下，会进行不同频率振动，由此该辅助发声层的不同区域即可以发出不同音调的声音，使得发声屏幕所发出的声音的层次感较强，音效较好。
在一种可能的实施方式中，如图8所示，其为图4所示的发声屏幕中一种辅助发声层的俯视图。其中，辅助发声层23还包括位于中间层231远离显示功能层21的一面上的隔离带1x，隔离带1x位于第一蒙皮中的两个子蒙皮(1a和1b)之间。隔离带位于第一蒙皮中任意两个子蒙皮之间，以隔断第一蒙皮中的任意两个子蒙皮，由于不同的子蒙皮的振动频率可能不同，若两个子蒙皮互相连接，这两个子蒙皮在振动时可能互相影响，使得两个子蒙皮的振动频率趋于相等，影响了发声屏幕发出的声音的层次感。而图8所示的发声屏幕中隔离带1x将子蒙皮隔离开，避免了子蒙皮之间直接接触，进而避免了子蒙皮之间的振动互相直接传导，进一步提高了发声屏幕发出的声音的层次感。
需要说明的是，图8示出的是隔离带1x位于子蒙皮1a和子蒙皮1b之间的情况，但是，隔离带1x还可以位于第一蒙皮的任意两个子蒙皮之间，本申请实施例对此不进行限制。
在一种可能的实施方式中，隔离带1x的材料与第一蒙皮的材料不同。也即是该隔离带1x可以由与第一蒙皮中任意一个子蒙皮的材料均不同的材料制成，如此可以提高隔离带1x对于子蒙皮中振动的隔离效果。
在一种可能的实施方式中，隔离带1x由吸振材料构成，例如可以包括高聚物吸振材料，如此可以不同的子蒙皮的振动互相传导。
在一种可能的实施方式中，隔离带1x与两个子蒙皮粘结。也即是隔离带1x可以通过粘结的方式与子蒙皮连接。在一种可能的实施方式中，隔离带1x的宽度可以略微大于(例如大1-5毫米)两个子蒙皮之间的间隔区域的宽度，子蒙皮可以先铺设在中间层上，之后将隔离带1x覆盖在该间隔区域，隔离带1x的边缘可以覆盖到子蒙皮上，并与子蒙皮粘结。
需要说明的是，两个子蒙皮之间也可以不设置隔离带，而仅具有一个间隔区域，本申请实施例对此不进行限制。
在一种可能的实施方式中，第一蒙皮中，子蒙皮的数量均为4，其子蒙皮的形状均为三角形或矩形。
在一种可能的实施方式中，如图9所示，其为本申请实施例中另一种辅助发声层的第一蒙皮232a的结构示意图。其示出了四个子蒙皮1a、子蒙皮1b、子蒙皮1c和子蒙皮1d均为矩形的情况，交叉的隔离带1x将这四个子蒙皮分隔开。
又如图10所示，其为本申请的一些实施例中另一种辅助发声层的第一蒙皮232a的结构示意图。其示出了四个子蒙皮1a、子蒙皮1b、子蒙皮1c和子蒙皮1d均为三角形的情况，交叉的隔离带1x将这四个子蒙皮分隔开。
此外，本申请实施例提供的发声屏幕中，辅助发声层两面的蒙皮的子蒙皮的数量、形状和排布方式还可以为其他，例如子蒙皮的数量还可以为3、5、6、7以及更多等等，形状也可以包括五边形、六边形、菱形中的至少一种等，本申请实施例对此不进行限制。
在一种可能的实施方式中，如图11所示，其为本申请的一些实施例中另一种辅助发声层的第一蒙皮232a的结构示意图。其示出了三个子蒙皮1a、子蒙皮1b和子蒙皮1c均为矩形的情况，两条平行的隔离带1x将这三个子蒙皮分隔开。
需要说明的是，上述示出了辅助发声层远离显示功能层一侧的第一蒙皮的结构，而辅助发声层靠近显示功能层一侧的第二蒙皮的结构可以参照第一蒙皮，和第一蒙皮不同的是，第二蒙皮可以并不具备磁性。
需要说明的是，上述附图中，示出的是一种方形螺旋状的音圈，但是本申请实施例提供的发声屏幕中，音圈还可以为其他结构，例如可以为圆形螺 旋结构，或者双螺旋结构等，本申请实施例对此不进行限制。
此外，上述图7、图8、图9、图10、图11中，示出的是每个子蒙皮中设置有一个音圈的情况，但是，还可以在每个子蒙皮中设置多个音圈，或者，在一个蒙皮上仅设置一个音圈，本申请实施例对此不进行限制。
如图12所示，其为本申请的一些实施例提供的另一种发声屏幕的结构示意图。其中，中间层231中具有阵列排布的多个通孔，多个通孔与位于中间层两面的蒙皮构成多个空腔(例如图12中的q1和q2)。辅助发声层具有至少两个发声区域，每个发声区域均排布有多个空腔，至少两个发声区域中，第一发声区域a1的第一空腔q1的体积和第二发声区域a2的第二空腔q2的体积不同。
在一种可能的实施方式中，第一空腔q1和第二空腔q2在辅助发声层221的厚度方向f1上的尺寸相同。如此可以降低空腔的制造难度，提高辅助发声层的制造速率。
在各个区域的空腔在辅助发声层221的厚度方向f1上的尺寸相同时，可以通过调整不同区域的空腔的形状大小来调整不同区域的空腔的体积。
在一种可能的实施方式中，如图13所示，其为图12所示的发声屏幕中一种辅助发声层23的俯视图。第一空腔q1被第一平面所截的第一截面m1和第二空腔q2被第一平面所截的第二截面m2的面积不同，第一平面为与辅助发声层23平行的任意一个面。
其中，面积不同可以包括三种情况，第一种情况：第一截面和第二截面的形状相同，但尺寸不同；第二种情况：第一截面和第二截面的形状不同，但尺寸相同(形状不同时的尺寸可以是指两种形状的最大宽度)；第三种情况：第一截面和第二截面的形状不同，尺寸也不同。
由图13可以看出，第一发声区域a1中的多个第一空腔q1的面积和形状相同，第二发声区域a2中的多个第二空腔q2的面积和形状相同，第一发声区域a1中的第一空腔q1的尺寸大于第二发声区域a2中的第二空腔q2的尺寸。
在一种可能的实施方式中，第一截面m1和第二截面m2的形状包括矩形、圆形、六角星形、三角形、五边形和六边形中的任意两种。
示例性的，如图14所示，其示出了本申请的一些实施例提供的另一种辅助发声层的俯视图。该辅助发声层23包括四个区域，这四个区域分别包括截面为三角形间隔排列的空腔、截面为矩形的间隔排列空腔、截面为六角星形 的空腔以及界面为五边形的连续排列的空腔。
或者，如图15所示，其示出了本申请的一些实施例提供的另一种辅助发声层的俯视图。辅助发声层23包括四个区域，这四个区域分别包括截面为三角形的连续排列空腔、截面为矩形的连续排列的空腔、截面为圆形的间隔排列的空腔。
本申请的一些实施例中，辅助发声层中的多个空腔的排布方式包括多种，例如，这多个空腔可以均匀排布在辅助发声层上，或者，这多个空腔也可以非均匀的排布在辅助发声层上。另外，这多个空腔可以间隔排布在辅助发声层上，或者这多个空腔也可以紧密排布在辅助发声层上，本申请实施例对此不进行限制。
在一种可能的实施方式中，第一发声区域a1的面积和第二发声区域a2的面积相等。也即是用于发出不同音调的区域的面积相等，如此可以较为平衡的发出不同的音调的声音，进一步提升发声屏幕的声音效果。
相关技术中，辅助发声层中的每个空腔的体积相同。扬声器发出的振动可以带动空腔中的气体振动，进而带动整个辅助发声板振动，以发出声音。
但是在同一强度的电信号驱动下，该辅助发声板各处所发出的声音也是同一种频率，如此导致发声屏幕发出的声音的音调(音调可以是指声音频率的高低，频率越高，音调越高，反之频率越低，则音调越低)过于统一，没有层次感，音效较差。
而本申请实施例中，辅助发声层中的空腔的体积可以不同。空腔的体积不同时，发声结构层产生的振动传递至空腔中时，该空腔随之产生的振动的频率也会不同，示例性的，空腔的体积越大，则振动频率越小，音调越低。进而当辅助发声层中不同区域的空腔的体积不同时，该不同区域发出的声音的音调也会不同，如此发声屏幕就能够发出音调不同的声音，声音的层次感较高，音效较好，进而提高了用户体验。
参照本申请实施例提供的发声屏幕，辅助发声层具有至少两个区域，那么其至少能够发出两个不同音调的声音。这两个不同音调的声音中的一种声音可以为较高音调的声音，音调较高的声音会让听众产生空灵，清凉和纤细的感觉；另一种声音可以为音调较低的声音，音调较低的声音会让听众产生雄浑，澎湃和粗犷的感觉。通过发出音调不同的声音，可以在很大程度上提高发声屏幕的声音效果。
综上所述，本申请实施例提供的一种发声屏幕，该发声屏幕具有磁性层以及磁性层上的音圈构成的发声结构，向音圈中接入音频信号，该音圈即可以在磁性层的磁场的作用下带动磁性层振动，进而发出声音，由于磁性层以及音圈构成的发声结构的结构简单，厚度较薄，进而使得发声屏幕的厚度也会相应的较薄，解决了相关技术中发声屏幕的厚度较厚，达到了减薄发声屏幕的厚度的效果。
需要说明的是，本申请实施例提供的发声屏幕中，显示功能层可以为自身具有显示图像功能的器件，也可以为用于承载影像画面的具有类似幕布功能的器件。
在一种可能的实施方式中，该显示功能层为自身具有显示图像功能的器件，则该显示功能层可以为液晶显示器或自发光显示器(如有机发光二极管显示器)等各种显示器。在此种情况下，该发声屏幕就是一款集显示与发声两种功能于一体的一个多媒体设备，其尺寸也会较为轻薄，用户体验较好。
在一种可能的实施方式中，该显示功能层为用于承载影像画面的器件，则该显示功能层可以由圆形菲涅尔光学膜片、黑栅幕或白塑幕等构成。显示功能层的厚度可以在0.5mm-1.7mm之间。
在此种情况下，如图16所示，其为本申请实施例提供的一种投影电视的结构示意图，该投影电视包括投影仪30以及上述实施例提供的任一发声屏幕20，投影仪30用于将影像画面投射到发声屏幕20的显示功能层上。
投影仪30将影像画面F投射到发声屏幕20上。在一种可能的实施方式中，该投影仪30可以为激光投影仪(Laser Projector)。
如图17所示，其为图16所示的投影电视右视图，可以看出，由于本申请实施例提供的发声屏幕20的厚度较薄，因而将发声屏幕20安装于墙壁w上后，发声屏幕20远离墙壁w的一面与墙壁w之间的距离h1也会较短，如此情况下，发声屏幕20整体与墙壁w较为贴合，视觉效果较好。
投影电视是一种新型的电视，其将幕布和投影仪有机的组合在了一起，能够在较小的空间下，实现大尺寸的高质量画面。
目前，为了缩小投影电视整体所占用的空间，通常会将投影仪30设置的尽可能靠近幕布。但是根据光学原理，投影仪30与幕布之间的距离过近时，投影仪30难以在幕布上投射影像画面，投影仪30与幕布之间的距离过远时，又会占用较大的空间。
另一方面，缩短投影仪30的焦距(投影仪的焦距越小，就越能够在更近的距离下成像)又较为困难，缩小每一毫米都需要投入大量的人力和物力。而本申请实施例提供的投影电视，通过降低发声屏幕20整体厚度的方式，进而增大了投影仪30与发声屏幕20之间的距离h2，如此便降低了对投影仪30的焦距的要求，使得焦距较大的投影仪30也能够应用与本申请实施例提供的投影电视中。示例性的，若该发声屏幕20的厚度降低了10毫米，则发声屏幕20远离墙壁w的一面与墙壁w之间的距离h1也会缩小10毫米，进而投影仪30与发声屏幕20之间的距离h2会扩大10毫米，如此便方便的将投影仪30的焦距要求降低了10毫米，大大降低了投影电视的制造成本。但是，想要直接将投影仪30的焦距降低10毫米，则可能需要重新设置投影仪30中的镜头，困难较大，成本较高。
而本申请实施例提供的投影电视，包括投影仪以及发声屏幕，该发声屏幕中的发声结构层包括磁性层和音圈，相较于电磁扬声器的发声结构，这两个结构可以构成厚度较薄的发声结构，进而可以减薄发声屏幕的厚度，便降低了对投影仪的焦距的要求，使得焦距较大的投影仪也能够应用与本申请实施例提供的屏幕配合使用。
本申请中术语“A和B的至少一种”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和B的至少一种，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。同理，“A、B和C的至少一种”表示可以存在七种关系，可以表示：单独存在A，单独存在B，单独存在C，同时存在A和B，同时存在A和C，同时存在C和B，同时存在A、B和C这七种情况。同理，“A、B、C和D的至少一种”表示可以存在十五种关系，可以表示：单独存在A，单独存在B，单独存在C，单独存在D，同时存在A和B，同时存在A和C，同时存在A和D，同时存在C和B，同时存在D和B，同时存在C和D，同时存在A、B和C，同时存在A、B和D，同时存在A、C和D，同时存在B、C和D，同时存在A、B、C和D，这十五种情况。
需要指出的是，在附图中，为了图示的清晰可能夸大了层和区域的尺寸。而且可以理解，当元件或层被称为在另一元件或层“上”时，它可以直接在 其他元件上，或者可以存在中间的层。另外，可以理解，当元件或层被称为在另一元件或层“下”时，它可以直接在其他元件下，或者可以存在一个以上的中间的层或元件。另外，还可以理解，当层或元件被称为在两层或两个元件“之间”时，它可以为两层或两个元件之间唯一的层，或还可以存在一个以上的中间层或元件。通篇相似的参考标记指示相似的元件。
在本申请中，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“多个”指两个或两个以上，除非另有明确的限定。
以上所述仅为本申请的可选实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种发声屏幕，包括：
    显示功能层以及位于所述显示功能层一面的发声结构层；
    所述发声结构层包括磁性层和音圈，所述音圈位于所述磁性层上，且所述磁性层具有各向异性的磁场。
  2. 根据权利要求1所述的发声屏幕，其中，所述发声屏幕还包括辅助发声层，所述辅助发声层位于所述发声结构层和所述显示功能层之间。
  3. 根据权利要求2所述的发声屏幕，其中，所述辅助发声层包括中间层以及位于所述中间层两面的蒙皮，所述辅助发声层靠近所述发声结构层一侧的第一蒙皮与所述磁性层为一体结构。
  4. 根据权利要求3所述的发声屏幕，其中，所述第一蒙皮包括位于所述中间层不同区域的至少两个子蒙皮，所述第一蒙皮的至少两个子蒙皮中，包括两个磁场强度不同子蒙皮。
  5. 根据权利要求3所述的发声屏幕，其中，所述第一蒙皮包括位于所述中间层不同区域的至少两个子蒙皮，所述第一蒙皮的至少两个子蒙皮中，包括两个材料不同的子蒙皮。
  6. 根据权利要求1所述的发声屏幕，其中，所述磁性层为磁性纤维板，所述磁性纤维板由具有磁性的纤维编织而成。
  7. 根据权利要求1所述的发声屏幕，其中，所述磁性层包括基板以及位于所述基板上的磁性涂层。
  8. 根据权利要求3所述的发声屏幕，其中，所述中间层中具有阵列排布的多个通孔，所述多个通孔与位于所述中间层两面的蒙皮构成多个空腔。
  9. 根据权利要求8所述的发声屏幕，其中，所述辅助发声层具有至少两 个发声区域，每个所述发声区域均排布有多个所述空腔，所述至少两个发声区域中，第一发声区域的第一空腔的体积和第二发声区域的第二空腔的体积不同。
  10. 一种投影电视，其中，所述投影电视包括投影仪以及权利要求1至9任一所述的发声屏幕，所述投影仪用于将影像画面投射到所述发声屏幕的显示功能层上。
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