Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display device with a speaker, and the display device shown in fig. 1 is taken as an example of a television 11, where the television 11 includes: a display screen 12 and a speaker 13; the display screen is a display part in the display device, and the loudspeaker is a sound emitting part in the display device. The speaker 13 is disposed behind the display screen 12 inside the television set 11. The speakers 13 are typically disposed on the left and right sides of the direction in which the user views the display screen 12, providing left and right channel sounds.
Along with the development of the market demand of users for display devices in the direction of light and thin, and the continuous progress of electronic technology, more and more key components such as a display screen and a base frame in the display device can be realized with a thinner thickness, so that the overall thickness of the electronic device is reduced. Therefore, in the television 11 shown in fig. 1, besides providing some means for display, the space reserved for the speaker 13 is smaller and smaller, and the manufacturer of the television 11 can only reduce the functions of the speaker 13 such as heavy bass, etc. so as to reduce the space occupied by the speaker 13 in the television 11. The speaker 13 installed in the television 11 can only meet the common playing function, cannot realize more sound effects, and reduces the playing performance of the speaker 13.
In other display devices, in order to pursue better audio/video effects, a separate projection screen is usually provided, and a separate sound box is provided as a speaker, for example, fig. 2 is a schematic structural diagram of another display device with a speaker, where the television box 21 may project a light beam onto the display screen 22 for a user to watch a video picture, and may also provide a sound signal to the external speaker 23 connected thereto, so that the speaker 23 plays audio. In the electronic device as shown in fig. 2, since the speakers 23 need to be separately provided, the speakers 23 can achieve more sound effects through a larger volume, and accordingly, the speakers 23 of the display device need to occupy more external space.
In the display devices shown in fig. 1 and 2, the speaker has a problem of limited position, and the sound played by the speaker is not good in audio-visual playback effect except from the display screen, regardless of whether the speaker is built in the display device or the speaker is externally connected.
Thus, some of the art electronic devices have "soundable screens", for example, FIG. 3 is a schematic structural diagram of a display device having actuators, which may be electromagnetic, piezoelectric, magnetostrictive, and any other type and structure of transducer. The plurality of drivers provided at the rear side of the display screen in the display device shown in fig. 3 may respectively excite the entire display screen to sound. For example, the exciter 141 provides a left channel sound signal, the exciter 142 provides a right channel sound signal, the exciter 143 provides a center channel sound signal, and so on. Under the action of the exciter, the display screen of the television 11 sounds through bending waves emitted by modal resonance. I.e. the display screen of the television set 11 can be used both for display and for sounding instead of a loudspeaker. Therefore, the display device such as the television 11 does not need to be provided with a mounting position for the speakers, but can replace the speakers by a corresponding number of exciters, so that the display device can provide stronger sound effects while being lighter and thinner.
For example, referring to fig. 4, fig. 4 is a schematic structural view of a sound emitting portion in a display device having a sound emitting screen. The sound emitting part may include: sound board 01, frame 02, foam 03 and exciter (not shown in fig. 4). The frame 02 has a clamping groove 021, the edge of the sound board 01 is generally wrapped with foam 03, and the sound board 01 with the foam 03 wrapped by the edge can be assembled in the clamping groove 021 in the frame 02. The exciter can be adhered to one surface of the sounding board 01, and the exciter can vibrate to make sound by driving the sounding board 01. The sound board 01 generally includes: a lower durometer intermediate layer 011 and a higher durometer skin 012 on either side of intermediate layer 011.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present application, where the display device may include:
a display screen 100, a sound board 200, a frame assembly 300, and an exciter 400.
In an embodiment of the present application, the sound board 200, the frame assembly 300 and the exciter 400 are used to construct a sound generating part in the display device.
The display 100 has a display surface 101, and sound producing portions in the display device are located on a side of the display surface 101 remote from the display 100.
In an embodiment of the present application, the sound board 200 may be disposed generally parallel to the display surface 101 of the display 100, and a surface of the sound board 200 remote from the display 100 may be connected to the exciter 400. The exciter 400 may vibrate the sound board 200 to emit sound.
In an embodiment of the present application, the display screen 100 in the display device 000 may include: a liquid crystal display, an organic light emitting diode display or a projection screen. When the display 100 includes a liquid crystal display or an organic light emitting diode display, the sound board 200 is located at a side of the display 100 away from the display surface thereof, and the display surface of the display 100 can directly display a picture. When the display screen 100 includes a projection screen, the sound emitting panel 200 is connected to a side of the display screen 100 remote from the display surface, and the display device 000 may further include a projector that can project a picture to the display surface of the display screen 100. In this manner, an actuator coupled to a side of the sound board 200 remote from the display surface of the display 100 may be in contact with the sound board 200. The exciter may vibrate the sound board 200 to make a sound, so that the display device 000 may make a sound.
For example, the exciter may be electrically connected to the display device 000, and the display device 000 may, in operation, send an acoustic electrical signal to the exciter. After receiving the sound electric signal, the exciter can perform reciprocating motion based on the sound electric signal, so that the whole surface of the sound board 200 can be driven to vibrate together, and the sound board 200 can generate sound.
In some implementations, the sound board 200 may include: a plate-shaped middle layer and skins positioned on two sides of the middle layer. For example, fig. 6 is a schematic structural diagram of a sound board provided in the present application, as shown in fig. 6, a skin 202 is disposed on each of two sides of a first side and a second side of an intermediate layer 201, the surface areas of the skin 202 and the intermediate layer 201 are the same, or the skin 202 may cover at least a portion of the intermediate layer 201.
As shown in fig. 7, the middle layer 201 of the sound board 200 provided in the embodiment is formed by connecting a plurality of honeycomb cores 2011 arranged in a hexagonal shape, and the sides corresponding to six sides of each honeycomb core 2011 are respectively connected with the corresponding sides of the other six honeycomb cores 2011 except for the honeycomb cores 2011 located around the structure.
Fig. 8 is a schematic diagram of a bonding structure of an intermediate layer and a skin of the sound board provided by the present application, and as shown in fig. 8, in the sound board 200, a cross section of a honeycomb core 2011 included in the intermediate layer 201 is disposed perpendicular to the skin 202. In some implementations, the present application provides an intermediate layer 201 comprising a honeycomb core 2011 that has different conductive properties in the x-direction than in the y-direction by providing two parallel sides of the hexagonal honeycomb core walls parallel to the y-direction, where no parallel sides are present in the honeycomb core walls. The conduction performance in different directions is realized by adjusting the hexagon stretching ratio of the cross section of the honeycomb core.
Fig. 9 is a schematic cross-sectional view of an intermediate layer of a sound board according to the present application. As shown in FIG. 9, the hexagonal cross section of the honeycomb core has a stretch ratio d/L in the x-y direction. Wherein, the first direction is the y direction in the graph, and the second direction is the x direction in the graph; d is a unit length of each honeycomb core in the x direction when a plurality of hexagonal honeycomb cores are arranged in sequence, the unit length d means: the plurality of hexagonal honeycomb cores are sequentially arranged and then are repeatedly arranged in the minimum length unit in the x direction, namely the plurality of hexagonal honeycomb cores are repeatedly arranged in the x direction according to the rule of unit length d; the unit length d in fig. 10 is the distance d between the sides ③ and ⑥ of the hexagon perpendicular to the x-axis; l is the unit length of each honeycomb core in the y direction when a plurality of hexagonal honeycomb cores are arranged in sequence, and the unit length L refers to: the plurality of hexagonal honeycomb cores are arranged in sequence and then are arranged in the smallest length unit in the y direction, namely the plurality of hexagonal honeycomb cores are repeatedly arranged in the y direction according to the rule of unit length L; the unit length L in fig. 10 is the sum of the distances in the y-direction of the hexagonal sides ①、⑥、⑤ and ⑦. Since for a standard hexagon the draw ratio in the x-direction is 0.58:1. In this embodiment, in order to make the conduction properties of the sound board in different directions different, all the honeycomb cores in the middle layer of the sound board may be stretched in the x direction of the section hexagon at a preset stretching ratio, so that the stretching ratio of the hexagonal interface of each honeycomb core is less than a preset threshold value of 0.58:1. Wherein, when the stretching ratio d/L is smaller, it means that the hexagonal interface of the honeycomb core as shown in FIG. 9 has a denser parallel wall distribution in the y direction, and the rigidity is stronger, so that bending waves are easily conducted by vibration; the hexagonal honeycomb core walls have larger included angles and weaker rigidity in the x direction, so that the conduction of bending wave vibration is easy to be absorbed.
Therefore, the middle layer shown in fig. 9 realizes different conduction performance of the sounding board in the x direction and the y direction through the setting of the stretching ratio of the honeycomb core, and further, when the sounding board conducts bending waves, the amplitude attenuation rules of the sounding board in the x direction and the y direction are different. For example, in the embodiment shown in fig. 9, when the stretching ratio in the y direction is less than 0.58:1, the conduction performance of the sound-producing plate in the x direction for bending waves is weaker than that of the sound-producing plate in the y direction for bending waves, which can cause the amplitude attenuation of bending waves in the x direction to be greater than that of bending waves when the sound-producing plate provided with the middle layer shown in fig. 9 transmits bending waves.
Meanwhile, the skins are attached to two sides of the middle layer, so that the fibers of the skins are correspondingly arranged in the middle layer in order to match the conductivity of the middle layer in the x-y direction. For example, fig. 10 is a schematic structural diagram of a skin of a sound board provided by the present application, and a skin surface fiber structure shown in fig. 10 is a structure of interwoven fibers in an x-y direction, wherein a density of fibers parallel to the y direction and perpendicular to the x direction is greater than a density of fibers parallel to the x direction and perpendicular to the y direction. Or in another skin structure provided in this embodiment, fibers parallel to the x-direction and perpendicular to the y-direction may not be provided, i.e., the skin is a unidirectional fiber structure, and all the fibers are provided in directions parallel to the y-direction and perpendicular to the x-direction.
Therefore, the skin structure shown in fig. 10 can cooperate with the intermediate layer to conduct, so that the amplitude attenuation rule of the sound board in the x direction and the y direction is different when the sound board conducts bending waves. Illustratively, in the embodiment shown in fig. 10, the fibers of the skin have a denser parallel fiber distribution in the y-direction, which is stiffer and therefore more prone to conduction of bending waves by vibration; the fibers of the skin are sparsely distributed in the x-direction parallel fibers, and the stiffness of the fibers is weaker, so that bending waves are not easy to conduct through vibration. Therefore, the amplitude attenuation of the bending wave in the x direction can be made larger than the amplitude attenuation of the bending wave in the y direction when the bending wave is transmitted by providing the intermediate layer shown in fig. 9 and providing the skin sounding board shown in fig. 10.
In some implementations, in the above embodiments, the honeycomb core may be made of paper, aramid, metal, or other composite materials. In some implementations, in the above embodiments, the material of the skin includes, but is not limited to, fiberglass, carbon fiber, glass-carbon hybrid fiber, plastic, lightweight aluminum, and the like. More illustratively, the first skin and the second skin may be the same or different in thickness. In some implementations, the thickness of the skin ranges from: 0.1 to 0.5 mm; or preferably, the thickness of the skin ranges from 0.1 to 0.18 mm.
More exemplary, fig. 11 is a schematic diagram of an amplitude attenuation rule when the display device provided by the application conducts bending waves, and fig. 11 shows the amplitude attenuation of the sound board in all directions under the excitation of the exciter. In the x-y direction, in the drawing, the point P (0, 0) where x=0 and y=0 is the position where the exciter 400 is attached to the sound board 200, so that the bending wave generated by the sound board 200 under the action of the exciter 400 is diffused around the point P, and the amplitude of the sound board at the point P is maximum. When the amplitude of point P at a certain time is 100% ×d, the bending wave gradually attenuates when the bending wave is spread around 360 degrees around point P in the sound generating plate 200, and gradually attenuates from 100% ×d to 90% ×d and 80% ×d … …. In particular, when bending waves are conducted in the x-direction and the y-direction separately, the amplitude attenuation value and the attenuation speed of the amplitude at the P-point in the x-direction are larger than the amplitude attenuation value and the attenuation speed of the amplitude at the P-point in the y-direction because the stretching ratio of the honeycomb core of the middle layer is smaller than a preset threshold value and the fiber density of the skin in the y-direction is larger than the fiber density in the x-direction.
In one possible implementation, as shown in fig. 5, a frame assembly 300 in a display device may be connected to an edge of the sound board 200.
As shown in fig. 12, fig. 12 is a schematic view illustrating connection between a frame assembly and a frame according to an embodiment of the present application. The frame assembly 300 includes: a frame 301 and a first elastic support 302.
For example, referring to fig. 13, fig. 13 is a cross-sectional view of a frame according to an embodiment of the application. The housing 301 may be an annular housing having a shape matching the shape of the sound board 200, and the housing 301 may further have an annular engagement groove 301a. The engagement groove 301a has three groove surfaces a, B, and C connected in sequence, for example.
As shown in fig. 12, the first elastic supporting portion 302 may be located in the clamping groove 301a, and the frame 301 may be connected to the edge of the sound board 200 through the first elastic supporting portion 302. And the first elastic supporting portion 302 is located between the frame 301 and the side surface of the sound board 200. That is, the first elastic supporting portion 302 is located between the groove surface a in the engagement groove 301a and the side surface in the sound board 200.
In one possible implementation, as shown in fig. 12, the frame assembly 300 may further include: a second elastic supporting portion 303 and a third elastic supporting portion 304. The second elastic supporting portion 303 and the third elastic supporting portion 304 may be located in the clamping groove 301a in the frame 301, and the frame 301 may be connected to the edge of the sound board 200 through the first elastic supporting portion 302, the second elastic supporting portion 303 and the third elastic supporting portion 304.
For example, the second elastic supporting portion 303 may be located between the frame 301 and a side of the sound board 200 near the display screen 100, that is, the second elastic supporting portion 303 is located between the groove surface B in the clamping groove 301a and a side of the sound board 200 near the display screen 100. The third elastic supporting portion 304 may be located between the frame 301 and a surface of the sound board 200 away from the display 100, that is, the third elastic supporting portion 304 is located between the groove surface C in the clamping groove 301a and a surface of the sound board 200 away from the display 100.
In the present application, the thickness of the first elastic support portion 302 located between the side surface of the sound board 200 and the frame 301 in the width direction of the sound board 200 is smaller than the thickness of the sound board 200. And the first elastic supporting portion 302, the second elastic supporting portion 303 and the third elastic supporting portion 304 are separated from each other, so, when the display device 000 is hung, the skin 201 with higher hardness in the sound generating plate 200 can be prevented from being embedded into the first elastic supporting portion 302 under the action of gravity, the probability that the edge of the sound generating plate 200 is fixed in the first elastic supporting portion 302 is effectively reduced, when the sound generating plate 200 vibrates under the driving of an exciter, the vibration amplitude of the sound generating plate 200 at the edge is not limited, and the sound generating effect of the display device 000 is further improved.
In one possible implementation, the sound board 200 may have a rectangular plate shape, and the frame 301 of the frame assembly 300 may include: four bar-like structures corresponding to the four edges of the sound board 200 one by one. The four bar structures are connected end to end in sequence to form a rectangular frame body matched with the shape of the sound board 200. For example, any two adjacent strip structures may be connected by an L-shaped connector, which may be fastened to the strip structures by screws. The material of the frame 301 in the display device 000 may be a metal material such as an aluminum alloy or a magnesium alloy.
In this case, the second and third elastic supports 303 and 304 in the frame assembly 300 may each be rectangular long foam. The length direction of each strip-shaped frame in the frame body 301 is the same as the length direction of the second elastic supporting portion 303 and the third elastic supporting portion 304 between the strip-shaped frame and the sound board 200.
In the embodiment of the present application, as shown in fig. 12, the first elastic supporting portion 302 may be cylindrical foam, and the first elastic supporting portion 302 contacts with the side surfaces of the frame 301 and the sound board 200, respectively. In this way, the first elastic supporting portion 302 can roll between the frame 301 and the sound board 200 following the vibration of the sound board 200, so that the sound board 200 can obtain a larger moving space.
By way of example, the material of the first resilient support 302 may include: ethylene propylene diene monomer. The material has better compression resistance.
In order to ensure the compression resistance of the first elastic supporting portion 302, the diameter of the first elastic supporting portion 302 should not be too small, and in order to meet the assembly requirements of the sound board 200 and the frame 301, the diameter of the first elastic supporting portion 302 should not be too large, so that the diameter of the first elastic supporting portion 302 is in the range of: the first elastic support 302 may have a diameter of 7 mm, for example, from 5mm to 10 mm.
The first elastic support portion 302 has a hardness of less than or equal to 30 degrees.
For example, when the thickness of the sound board 200 is 8mm, the first elastic supporting portion 302 may be: the diameter is 7mm, the hardness is 30 degrees, the material is the supporting part of ethylene propylene diene monomer rubber, and when the sound board 200 is at rest, the compression amount of the first elastic supporting part 302 caused by the gravity of the sound board 200 is less than 0.5 mm on average. In this way, when the sounding board 200 is assembled with the frame 301, the first elastic supporting portion 302 is not deformed greatly due to extrusion of the sounding board 200, the sounding board 200 is ensured to be located in the central area of the frame 300, and the shape of the first elastic supporting portion 302 is ensured to be cylindrical foam and can move in the clamping groove 301a along with vibration of the sounding board 200.
Thus, the sound board 202 can be moved in the thickness direction thereof, and is not moved in the length direction and the width direction thereof.
In order to enable the sound board 202 to move along the thickness direction, the second elastic portion 303 and the third elastic portion 304 on both sides of the sound board 200 may be made of an elastic material with a smaller elastic coefficient. That is, the elastic coefficients of the second elastic portion 303 and the third elastic portion 304 are smaller than the elastic coefficient of the first elastic supporting portion 302.
In this case, referring to fig. 14, fig. 14 is a schematic diagram of the sounding part shown in fig. 12 when the sounding part is in suspension operation. The second elastic supporting portion 303 and the third elastic supporting portion 304 can provide elastic support to the sound board 200 when the sound board 200 vibrates, and the elastic support acts as a spring. In this way, the sound board 200 is suspended in the middle of the housing 301, and the sound board 200 can freely move in the thickness direction (i.e., the direction x1 and the direction x 2).
By way of example, the sound board 200 in the display device 000 has both a stationary state and a vibrating state.
When the exciter in the display device 000 is in an inactive state, the sound board 200 is in a stationary state; in the operation state of the actuator in the display device 000, the sound board 200 is in a vibration state.
When the sound board 200 is in a stationary state, as shown in fig. 12, since the sound board 200 is in a stationary state, the first elastic supporting portion 302 may be located at an intermediate position of the catching groove 301 a. In this way, when the sound board 200 is in a static state, the first elastic supporting portion 302 is located in the middle of the groove surface a of the clamping groove 301a in the frame 301, so that the force of the first elastic supporting portion 302 between the sound board 200 and the frame 301 is uniform, and the tightness of the connection between the clamping groove 301a and the sound board 200 is ensured.
When the sound board 200 in this display device 000 is in a vibrating state, the positional relationship between the first elastic supporting portion 302 and the click groove 301a is as follows:
In the first case, the actuator in the display device 000 is in an operating state, and the actuator can move the sound board 200 in the x1 direction. In this case, as shown in fig. 15, fig. 15 is a schematic view of a position of another first elastic supporting portion in the clamping groove according to the embodiment of the present application, because the sound board 200 moves in a direction approaching the display surface in the display screen 100, the first elastic supporting portion 302 rolls in a counterclockwise direction in the clamping groove 301a along with the movement of the sound board 200, so that the first elastic supporting portion 302 is located in the clamping groove 301a near the display surface in the display screen 100.
In the second case, the actuator in the display device 000 is in an operating state, and the actuator can drive the sound board 200 to move in the x2 direction. In this case, as shown in fig. 16, fig. 16 is a schematic view of a position of a further first elastic support portion in the clamping groove according to the embodiment of the present application, because the sound board 200 vibrates in a direction away from the display surface in the display screen 100, the first elastic support portion 302 rolls in a clockwise direction in the clamping groove 301a along with the movement of the sound board 200, and the first elastic support portion 302 is located in the clamping groove 301a away from the display surface in the display screen 100.
As shown in fig. 17 and 18, fig. 17 is a front view of a connection between a sound board and a frame according to an embodiment of the present application, and fig. 18 is a front view of a connection between another sound board and a frame according to an embodiment of the present application. When the sound emitting panel 200 in the display device 000 has a rectangular plate shape, the first elastic supporting portion 302 between the frame 301 in the display device 000 and one side surface of the sound emitting panel 200 may include: at least one cylindrical foam 302a.
In one exemplary implementation, as shown in fig. 17, the first elastic support portion 302 between the frame 301 and one side surface of the sound board 200 in the display device 000 may include: a cylindrical foam 302a, and the longitudinal direction of the cylindrical foam 302a is the same as the longitudinal direction of the side surface with which it contacts.
In another exemplary implementation, as shown in fig. 18, a first elastic support portion 302 between a frame 301 and one side surface of the sound board 200 in the display device 000 may include: a plurality of cylindrical foam 302a, and the length direction of each cylindrical foam 302a is the same as the length direction of the side surface with which it contacts. For example, the plurality of cylindrical foam 302a may be uniformly distributed between the frame 301 and one side of the sound emitting panel 200, for example, the first elastic support 302 between the frame 301 and the upper side of the sound emitting panel 200 in the display device 000 may include 3 cylindrical foam 302a, and the first elastic support 302 between the frame 301 and the lower side of the sound emitting panel 200 in the display device 000 may include 4 cylindrical foam 302a. In this case, the cylindrical foam 302a in the frame assembly 300 has a smaller volume, uses less material, and effectively reduces the manufacturing cost of the projection screen.
In an embodiment of the present application, in order to prevent the second elastic supporting portion 303 and the third elastic supporting portion 304 from falling off from the frame 301 during the vibration of the sound emitting panel 200, the second elastic supporting portion 303 may be bonded to at least one of the frame 301 and the sound emitting panel 200, and the third elastic supporting portion 304 may be bonded to at least one of the frame 301 and the sound emitting panel 200.
In the related art, needs to bond longer bubble cotton at the edge of sound board, at the in-process of bonding, appears bubble cotton easily and sound board partial region unstable condition of bonding, when sound board and framework assembly, bubble cotton easily drops, causes rigid contact between sound board and the framework, and the sound board is fragile at vibration in-process. In addition, in recent years, the width of the frame body at the edge is gradually reduced, and when the frame body is connected with the edge of the sound board, foam is exposed easily, which affects the aesthetic appearance of the display device.
In the embodiment of the present application, the third elastic supporting portion 304 may be adhered to the frame 301 and contact with the sound board 200. In this case, since the third elastic supporting portion 304 is adhered to the frame 301 between the side of the sound board 200 away from the display surface of the display 100 and the frame 301, the third elastic supporting portion 304 can be prevented from falling off during the assembly process of the sound board 200 and the frame 301, thereby avoiding hard contact between the sound board 200 and the frame 301 and reducing the probability of damage during the vibration process of the sound board 200. Meanwhile, the third elastic supporting portion 304 is adhered to the frame 301, so that the third elastic supporting portion 304 can be completely wrapped by the edge of the frame 301, the third elastic supporting portion 304 is prevented from being exposed, and the attractiveness of the display device 000 is improved.
In the present application, when the third elastic supporting portion 304 is adhered to the frame 301, the second elastic supporting portion 303 may be adhered to the sound emitting board 200 and contact with the frame 301 in order to facilitate the connection of the frame 301 to the edge of the sound emitting board 200 through the engagement groove 301 a. In this way, when the second elastic supporting portion 303 and the third elastic supporting portion 304 are adhered to the frame 301, when the frame 301 is connected to the edge of the sound board 200 through the clamping groove 301a, the sound board 200 generates an upward force on the second elastic supporting portion 303 and the third elastic supporting portion 304, so that the second elastic supporting portion 303 and the third elastic supporting portion 304 fall off from the frame 301, and the rigid contact between the sound board 200 and the frame 301 is avoided, thereby reducing the probability of damage to the sound board 200 during the vibration process of the sound board 200.
Alternatively, the second elastic supporting portion 303 and the third elastic supporting portion 304 may be a buffering damping single-sided adhesive tape made of foam or sponge.
As for the structures of the second elastic supporting portion 303 and the third elastic supporting portion 304, the embodiment of the present application will be schematically described by taking the following two cases as examples:
In the first case, the second and third elastic supporting parts 303 and 304 may include: damping foam and double faced adhesive tape positioned on one side of the damping foam.
In the second case, the second and third elastic supporting parts 303 and 304 may include, but are not limited to: silicone rubber, modified rubber material layers, sponge or EVA foam, etc. The thickness of the second and third elastic supporting portions 303 and 304 may be 2mm to 2.5 mm. One surface of the second elastic supporting portion 303 and the third elastic supporting portion 304 has adhesiveness, or is coated with a thin adhesive tape.
In an embodiment of the present application, the display device 000 may further include: and the two ends of the strip-shaped cover plate are respectively connected with the frame body 301 in the frame assembly 300, the exciter is positioned between the sounding board 200 and the cover plate, and the exciter is connected with the cover plate. The cover plate may act as a support reinforcement on the frame 301 and may be used to shield the actuator.
The number of cover plates in the display device 000 may be two, and the display device 000 may further include: a strip-shaped supporting plate positioned between the two cover plates. Both ends of the support plate may be coupled to the frame body 301 in the frame assembly 300. Wherein the support plate can support the sound emitting plate 200 in the display device 000, prevent the sound emitting plate 200 from collapsing at the center, and improve the stability of the display device 000.
By way of example, the length directions of the two cover plates and the length direction of the support plate in the display device 000 are all parallel. And both ends of each cover plate, and both ends of the support plate may be connected to the frame body 301 in the frame assembly 300 by screws. Alternatively, shock-absorbing layers may be provided at both ends of each cover plate and at positions where both ends of the support plate are in contact with the frame 301, and the shock-absorbing layers may have a thickness ranging from 0.5 mm to 0.8 mm. The material of the shock absorbing layer may include: acrylic hyposensitive adhesive tape, similar adhesive tape, silica gel pad or foam, etc. The shock-absorbing layer can reduce the probability of noise generated by collision between the cover plate and the frame 301 caused by vibration of the sound-producing plate 300, and further improve the sound effect of sound produced by the display device 000.
In the embodiment of the present application, the plurality of actuators between the cover plate in the display device 000 and the sound board 200 may be bonded to the cover plate through the buffer bonding layer, so as to implement buffer damping connection between the actuators in the display device 000 and the cover plate.
In an exemplary embodiment, the display device 000 may be a projection screen in a laser projection system. As shown in fig. 19 and 20, fig. 19 is a schematic structural view of a projection screen according to an embodiment of the present application, and fig. 20 is a schematic positional relationship between a first elastic supporting portion, a second elastic supporting portion, and a third elastic supporting portion of the projection screen shown in fig. 19 and a sound board. The first elastic support portion 302 in the projection screen includes three cylindrical foam pieces 302a, and the second elastic support portion 303 and the third elastic support portion 304 in the projection screen are rectangular elongated foam pieces.
In summary, the display device provided in the embodiment of the present application includes: display screen, sound board, frame subassembly and exciter. The thickness of the first elastic supporting part between the side surface of the sounding board and the frame body in the width direction of the sounding board is smaller than that of the sounding board. And this first elastic support portion, second elastic support portion and third elastic support portion cut off each other, so, when this display device hangs, can avoid the higher covering of hardness in the sound board to imbed in the first elastic support portion under the action of gravity, the effectual edge that reduces the sound board is fixed in the probability in the first elastic support portion, when the sound board vibrates under the drive of exciter, the sound board can not receive the restriction at the vibration amplitude of edge vibration, and then improved this display device's sound effect.
In the present disclosure, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.
The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but is intended to cover all modifications, equivalents, alternatives, and improvements falling within the spirit and principles of the application.