CN112584288B - Sound production board and projection screen - Google Patents

Abstract

The application discloses sound production board and projection screen belongs to laser projection technical field. This sound production board includes: honeycomb core layer, first skin and second skin. The honeycomb core layer is in a rectangular plate shape. Because the orthographic projection of the honeycomb core in the honeycomb core layer on the first skin or the second skin is a hexagonal annular ring, and the absolute value of the difference value of the angles of the first included angle and the second included angle is larger than or equal to a first preset angle, the arrangement density of the honeycomb core walls in the honeycomb core is larger than the arrangement density of the honeycomb core walls in the honeycomb core along the long side x direction of the rectangle along the short side y direction of the rectangle. Thus, the transmission performance of the sound-emitting panel in the x direction and the y direction is greatly different. In the projection screen prepared by the subsequent sound-emitting board, the sound-emitting board is driven by the exciter to vibrate to emit sound with a wider frequency response range, so that the sound-emitting effect of the projection screen is improved.

Description

Sound production board and projection screen

Technical Field

The application relates to the technical field of laser projection, in particular to a sound board and a projection screen.

Background

The laser projection system comprises a projection screen and a laser projection device, wherein the laser projection device can project pictures on the projection screen to realize the functions of video playing and the like.

Currently, the sound generating assembly in a laser projection system can be integrated into a projection screen. The projection screen may include: a display function layer, a sound-emitting panel and an actuator. Wherein the display function layer is bonded to the sound-emitting panel, and the exciter may be bonded to a side of the sound-emitting panel remote from the display function layer. The exciter may vibrate with the sound board to generate sound.

Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a sound-generating panel provided in the related art, and fig. 2 is an exploded view of the sound-generating panel shown in fig. 1. The sound-emitting panel may include: the honeycomb structure comprises a honeycomb core layer 01, two skins 02 positioned on two sides of the honeycomb core layer 01, and a bonding layer 03 positioned between the honeycomb core layer 01 and each skin 02. The skin 02 is bonded to the honeycomb core layer 01 by a bonding layer 03. One of the two skins 02 is bonded to the display function layer, and the other is bonded to the exciter.

In the related art, referring to fig. 3, fig. 3 is a schematic view of a structure of a honeycomb core layer in the sound-emitting panel shown in fig. 1. The honeycomb core layer 01 in the sound-emitting panel is composed of a plurality of honeycomb cores 011 having the same shape. The plurality of honeycomb cores 011 are all regular hexagonal honeycomb cores.

However, the anisotropy of the regular hexagonal structure is poor. When the honeycomb core layer 01 in the sound board is composed of a plurality of regular hexagon honeycomb cores 001 with the same shape, the difference of the conduction performance of the sound board to vibration in all directions is small, so that the frequency response range of sound generated by vibration of the sound board under the driving of the exciter is narrow, and the sound generating effect of the projection screen is poor.

Disclosure of Invention

The embodiment of the application provides a sounding board and a projection screen. The problem that the frequency response range of the sound generated by the sound generating plate under the driving of the exciter is narrow and the sound generating effect of the projection screen is poor in the prior art can be solved, the technical scheme is as follows:

in one aspect, there is provided a sound-emitting panel comprising:

the honeycomb core layer, the first skin and the second skin are positioned on two sides of the honeycomb core layer, and the first skin and the second skin are both connected with the honeycomb core layer;

the honeycomb sandwich layer has a plurality of honeycomb cores, every the honeycomb core is in first covering or orthographic projection's on the second covering shape is hexagonal shape's annular, hexagonal shape's annular has the same first contained angle of four angles and the same second contained angle of two angles, first contained angle with the absolute value of the difference of the angle of second contained angle is greater than or equal to first preset angle.

In another aspect, a projection screen is provided, the projection screen comprising:

the above-mentioned sound-emitting panel;

the display functional layer is connected with one side, far away from the honeycomb core layer, of the first skin in the sound-emitting plate;

and the exciter is connected with one side, far away from the honeycomb core layer, of the second skin in the sound production plate, and is used for driving the sound production plate to vibrate so as to produce sound.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

this sound production board includes: honeycomb core layer, first skin and second skin. The honeycomb core layer is in a rectangular plate shape. Because the orthographic projection of the honeycomb core in the honeycomb core layer on the first skin or the second skin is a hexagonal annular ring, and the absolute value of the difference value of the angles of the first included angle and the second included angle is larger than or equal to a first preset angle, the arrangement density of the honeycomb core walls in the honeycomb core is larger than the arrangement density of the honeycomb core walls in the honeycomb core along the long side x direction of the rectangle along the short side y direction of the rectangle. Thus, the transmission performance of the sound-emitting panel in the x direction and the y direction is greatly different. In the projection screen prepared by the subsequent sound-emitting board, the sound-emitting board is driven by the exciter to vibrate to emit sound with a wider frequency response range, so that the sound-emitting effect of the projection screen is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a sound-emitting panel provided in the related art;

fig. 2 is an exploded view of the sound-emitting panel shown in fig. 1;

fig. 3 is a schematic structural view of a honeycomb core layer in the sound-emitting panel shown in fig. 1;

fig. 4 is an exploded view of a sound board according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a honeycomb core layer in the sound-emitting panel shown in fig. 4;

FIG. 6 is an effect plot of an orthographic projection of a honeycomb core of the honeycomb core layers shown in FIG. 4 on a skin;

fig. 7 is an exploded view of another sound-emitting panel according to an embodiment of the present invention;

fig. 8 is a structural view of a honeycomb core layer in the sound-emitting panel shown in fig. 7;

fig. 9 is a side view of the sound-emitting panel shown in fig. 7;

fig. 10 is a schematic diagram illustrating an arrangement of a first sub-honeycomb core layer and two second sub-honeycomb core layers according to an embodiment of the present disclosure;

fig. 11 is a schematic diagram of another arrangement of a first sub-honeycomb core layer and two second sub-honeycomb core layers according to an embodiment of the present application;

fig. 12 is a schematic diagram of an arrangement of a first sub-honeycomb core layer and two second sub-honeycomb core layers according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a projection screen according to an embodiment of the present application;

FIG. 14 is an exploded view of the projection screen shown in FIG. 13;

fig. 15 is a diagram illustrating an effect of a sound-emitting panel in a multi-mode according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a laser projection system according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 4, fig. 4 is an exploded view of a sound-emitting panel according to an embodiment of the present application. The sound board 000 may include:

the honeycomb core layer 100, and the first skin 200 and the second skin 300 located at both sides of the honeycomb core layer 100, and both the first skin 200 and the second skin 300 are connected with the honeycomb core layer 100.

Referring to fig. 5, fig. 5 is a schematic structural view of a honeycomb core layer in the sound board shown in fig. 4. The honeycomb core layer 100 has a plurality of honeycomb cores 100a, and the orthogonal projection of each honeycomb core 100a on the first skin 200 or the second skin 300 has a hexagonal ring shape. As shown in fig. 6, fig. 6 is an effect diagram of an orthographic projection of the honeycomb core on the skin in the honeycomb core layer shown in fig. 4. The hexagonal ring shape has four first included angles alpha of the same angle and two second included angles beta of the same angle. The absolute value of the difference between the first included angle alpha and the second included angle beta is greater than or equal to a first preset angle.

In the related art, as shown in fig. 3, a honeycomb core layer 01 in a sound board is composed of a plurality of regular hexagonal honeycomb cores 011 having the same shape, and the sound board has a rectangular plate shape. In the x direction along the long side of the rectangle, the regular hexagonal honeycomb core 011 in the honeycomb core layer 01 has one honeycomb wall parallel to the x direction or one honeycomb core wall intersecting the x direction; in the y direction along the short side of the rectangle, the regular hexagonal honeycomb core 011 in the honeycomb core layer 01 has two honeycomb core walls parallel to the x direction. Because the regular hexagon structure is close to circular structure, consequently, on x direction and y direction, the honeycomb wall of regular hexagon honeycomb core 011 in honeycomb sandwich layer 01 arranges the density closely, leads to the sound production board to be less with the conduction performance difference of y direction vibration in x direction, and then leads to the frequency response scope of the sound that this sound production board vibration was sent under the drive of exciter narrower, and this projection screen's vocal effect is relatively poor.

In the present application, as shown in fig. 5 and 6, the sound-emitting panel 000 also has a rectangular plate shape. Because the orthographic projection of the honeycomb core 100a in the honeycomb core layer 100 on the first skin 200 or the second skin 300 is a hexagonal ring shape, and the absolute value of the difference between the first included angle α and the second included angle β is greater than or equal to the first preset angle, the arrangement density of the honeycomb core walls in the honeycomb core 100a in the honeycomb core layer 100 in the direction x along the long side of the rectangle is greater than the arrangement density of the honeycomb core walls in the honeycomb core 100a in the honeycomb core layer 100 in the direction y along the short side of the rectangle. For example, when the first angle α is larger than the second angle β, the arrangement density of the honeycomb core walls in the honeycomb core 100a in the honeycomb core layer 100 in the direction x along the long side of the rectangle is smaller than the arrangement density of the honeycomb core walls in the honeycomb core 100a in the direction y along the short side of the rectangle.

Thus, the sound board 000 has a large difference in conduction performance between vibrations in the x direction and vibrations in the y direction. In the projection screen prepared by the sound-emitting board 000, the frequency response range of the sound emitted by the sound-emitting board 000 under the driving of the exciter is wider, and the sound-emitting effect of the projection screen is further improved.

To sum up, the sound board that this application embodiment provided includes: honeycomb core layer, first skin and second skin. The honeycomb core layer is in a rectangular plate shape. Because the orthographic projection of the honeycomb core in the honeycomb core layer on the first skin or the second skin is a hexagonal annular ring shape, and the absolute value of the difference value of the angles of the first included angle and the second included angle is larger than or equal to a first preset angle, the difference between the arrangement density of the honeycomb core walls in the honeycomb core and the arrangement density of the honeycomb core walls in the honeycomb core along the long side x direction of the rectangle is larger than that along the short side y direction of the rectangle. Thus, the transmission performance of the sound-emitting panel in the x direction and the y direction is greatly different. In the projection screen prepared by the subsequent sound-emitting board, the sound-emitting board is driven by the exciter to vibrate to emit sound with a wider frequency response range, so that the sound-emitting effect of the projection screen is improved.

In the present application, as shown in fig. 6, an orthogonal projection of the plurality of honeycomb cores 100a in the honeycomb core layer 100 on the first skin 200 or the second skin 300 is a hexagonal ring-shaped ring shape, and an absolute value of a difference between angles of the first included angle α and the second included angle β is smaller than or equal to a second preset angle. In this manner, the strength of the plurality of honeycomb cores 100a in the honeycomb core layer 100 in the x direction or the y direction can be ensured to be strong.

For example, the first preset angle may be 30 degrees, and the second preset angle may be 120 degrees. That is, the range of the absolute value of the difference between the first included angle α and the second included angle β is: 30 to 120 degrees.

In the embodiment of the present application, the sound-emitting panel 000 may have a rectangular plate shape, and the shape of the sound-emitting panel 000 is the same as that of the honeycomb core layer 100. As shown in fig. 6, an orthographic projection of the plurality of honeycomb cores 100a in the honeycomb core layer 100 on the first skin 200 or the second skin 300 is a hexagonal ring shape, and the first included angle α is larger than the second included angle β. The hexagonal ring shape has a symmetry axis parallel to the direction of the long side of the sound-emitting plate 000, and the symmetry axis passes through two second included angles β of the hexagonal ring shape. As such, the arrangement density of the honeycomb core walls in the honeycomb core 100a in the honeycomb core layer 100 in the y direction along the short side of the sound-emitting panel is larger than the arrangement density of the honeycomb core walls in the honeycomb core 100a in the honeycomb core layer 100 in the x direction along the long side of the sound-emitting panel. On the premise of ensuring the integral strength of the honeycomb core layer 100, the frequency response range of the sound generated by the sound generating plate 000 under the driving of the exciter is enlarged, and the sound generating effect of the projection screen is improved.

It should be noted that, in the embodiments of the present application, the first included angle α is schematically illustrated as being larger than the second included angle β, and in other alternative implementations, the first included angle α may also be smaller than the second included angle β. The embodiment of the present application does not limit this.

In the present application, please refer to fig. 7, fig. 8, and fig. 9 in an embodiment of the present application, where fig. 7 is an exploded view of a structure of another sound-generating panel provided in the embodiment of the present application, fig. 8 is a schematic structural diagram of a honeycomb core layer in the sound-generating panel shown in fig. 7, and fig. 9 is a side view of the sound-generating panel shown in fig. 7. The honeycomb core layer 100 in the sound board 000 may further include: the honeycomb structure comprises a first sub-honeycomb core layer 101 and two second sub-honeycomb core layers 102 located on two sides of the first sub-honeycomb core layer 101, wherein the two second sub-honeycomb core layers 102 are connected with the first sub-honeycomb core layer 101.

The thickness of the first sub-honeycomb core layer 101 is greater than that of the second sub-honeycomb core layer 102, and the surface of the first sub-honeycomb core layer 101, which is in contact with the first skin 200, and the surface of the second sub-honeycomb core layer 102, which is in contact with the first skin 200, are coplanar. Since the side of the first sub-honeycomb core layer 101 in contact with the first skin 200 and the side of the second sub-honeycomb core layer 102 in contact with the first skin 200 are coplanar. Therefore, the first skin 200 has a high flatness, and when the side of the subsequent first skin 200 away from the honeycomb core layer 100 is connected with the display function layer, the display function layer can be guaranteed to have a high flatness. Meanwhile, since the thickness of the second sub-honeycomb core layer 102 is smaller than that of the first sub-honeycomb core layer 101, the overall weight of the honeycomb core layer 100 in the sound-emitting panel 000 is reduced. When the projection screen is subsequently prepared by adopting the sound-emitting board 000 and needs to present a bass effect, the exciter in the projection screen can drive the sound-emitting board 000 to vibrate with a higher amplitude, so that the bass effect of the projection screen is improved.

It should be noted that, as shown in fig. 9, since the first sub-honeycomb core layer 101 in the honeycomb core layer 100 is coplanar with the first skin 200 of the second sub-honeycomb core layer 102 in the honeycomb core layer 100, the first skin 200 has a higher flatness after the first skin 200 is bonded to one side of the honeycomb core layer 100 by the first bonding layer 400. As the skin in the sound-emitting panel 000 may be made of a flexible material such as glass fiber or carbon fiber, when the second skin 300 is bonded to the other side of the honeycomb core layer 100 by the second bonding layer 500, the second skin 300 can be ensured to be closely attached to the first sub-honeycomb core layer 101 in the honeycomb core layer 100, and the second skin 300 can be ensured to be closely attached to the second sub-honeycomb core layer 102 in the honeycomb core layer 100. In this case, the second skin 300 is not a flat structure, but a bent structure.

Optionally, the material of the honeycomb core layer 100 in the sound-emitting panel 000 may be: paper, aramid, metal or other composite materials. And the thicknesses of the first skin 200 and the second skin 300 may be the same or different. For example, the thickness ranges of the first skin 200 and the second skin may each be: 0.1 to 0.5 mm.

In the embodiment of the present application, the thickness of the first sub-honeycomb core layer 101 in the honeycomb core layer 100 may be in a range of: 8 to 15 mm. There are many possible implementations of the range of the thicknesses of the two second sub-honeycomb core layers 102 in the honeycomb core layer 100, and the embodiment of the present application is schematically illustrated by taking the following three possible implementations as examples:

in a first possible implementation, the thicknesses of the two second sub-honeycomb core layers 102 in the honeycomb core layer 100 may both range from: 5 to 8 mm.

In a second possible implementation manner, the thicknesses of the two second sub-honeycomb core layers 102 in the honeycomb core layer 100 may both range from: 2 to 5 mm.

In a third possible implementation, the thickness of one of the two second sub-honeycomb core layers 102 in the honeycomb core layer 100 may range from: 5 to 8 millimeters, the thickness of another second sub-honeycomb core layer 102 may range from: 2 to 5 mm.

In the present application, please refer to fig. 8, a first sub-honeycomb core layer 101 in the honeycomb core layer 100 has a plurality of first honeycomb cores 101a with the same shape, and two second sub-honeycomb core layers 102 in the honeycomb core layer 100 have a plurality of second honeycomb cores 102a with the same shape. Wherein, the orthographic projection of each first honeycomb core 101a on the first skin 200 is a first ring shape, the orthographic projection of each second honeycomb core 102a on the first skin 200 is a second ring shape, and the inner edge length of the first ring shape is smaller than the inner wall darkness of the second ring shape. Thus, the arrangement density of the second honeycomb cores 102a in the two second sub-honeycomb core layers 102 is smaller than the arrangement density of the first honeycomb cores 101a in the first sub-honeycomb core layer 101, so that the weight of the honeycomb core layer 100 can be further reduced, and the weight of the sound-emitting panel can be further reduced.

By way of example, the inner edge length of the first ring may range from: 2 to 5 mm, the inner edge length of the second ring may range from: 2 to 10 mm. It should be noted that the inner side lengths of the second rings corresponding to the second honeycomb cores 102a in the two second sub-honeycomb core layers 102 may be different, for example, the inner side length of the second ring corresponding to the second honeycomb core 102a in one second sub-honeycomb core layer 102 is 6 mm, and the inner side length of the second ring corresponding to the second honeycomb core 102a in the other second sub-honeycomb core layer 102 is 8 mm.

It should be further noted that the absolute value of the difference between the first included angle α and the second included angle β in the first ring and the absolute value of the difference between the first included angle α and the second included angle β in the second ring may be the same or different.

In the present embodiment, the wall thickness of the first honeycomb core 101a in the first sub-honeycomb core layer 101 is greater than the wall thickness of the second honeycomb core 102a in the second sub-honeycomb core layer 102. By way of example, the wall thickness range of the first honeycomb core 101a and the wall thickness range of the second honeycomb core 102a may both be: 0.01 to 0.06 mm. It should be noted that the wall thickness range of the first honeycomb core 101a and the wall thickness of the second honeycomb core 102a in the two second sub-honeycomb core layers 102 may be different, for example, the wall thickness of the first honeycomb core 101a in the first sub-honeycomb core layer 101 may be 0.05 mm, the wall thickness of the second honeycomb core 102a in one second sub-honeycomb core layer 102 may be 0.04 mm, and the wall thickness of the second honeycomb core 102a in the other second sub-honeycomb core layer 102 may be 0.02 mm. In this way, the weight of the second sub-honeycomb core layer 102 can be further reduced, and thus the weight of the sound-emitting panel 000 can be reduced.

In this application, referring to fig. 7, the sound board 000 may further include: a first adhesive layer 400 between the first skin 200 and the honeycomb core layer 100, and a second adhesive layer 500 between the second skin 300 and the honeycomb core layer 100. The first skin 200 may be bonded to the honeycomb core layer 100 by a first bonding layer 400, and the second skin 300 may be bonded to the honeycomb core layer 100 by a second bonding layer 500.

Alternatively, the first adhesive layer 400 and the second adhesive layer 500 may be both: glue, glue film or double-sided adhesive and other adhesives.

In the embodiment of the present application, please refer to fig. 7 and 8, the sound board 000 may further include: a partition plate 600 located between the first sub-honeycomb core layer 101 and each second sub-honeycomb core layer 102, and the first sub-honeycomb core layer 101 and the second sub-honeycomb core layer 102 are connected to the partition plate 600. For example, the first sub-honeycomb core layer 101 and the second sub-honeycomb core layer 102 may be bonded to the isolation plate 600 by an adhesive such as glue, an adhesive film, or a double-sided adhesive. Thus, the partition board 600 can divide the honeycomb core layer 100 into three sound-emitting areas, and the three sound-emitting areas can all generate physical displacement and deformation, so that the three sound-emitting areas can all emit sound. Since the isolation plate 600 does not generate physical displacement and deformation, the probability that the physical displacement and deformation generated by the three sound-emitting areas interfere with each other is reduced, and the stereo effect of the sound emitted by the sound-emitting plate 000 is effectively improved.

Further, the isolation plate 600 may increase the density of modal vibration of the honeycomb core layer 100, increase the sound field width of the sound generated by the sound generating plate 000, and improve the sound generating effect of the projection screen.

For example, the thickness of the separator 600 may be 0.1 to 1 mm. The material of the separator 600 may include: metallic aluminum.

In the above embodiment, the orthographic projection area of each second sub-honeycomb core layer 102 on the first skin 200 is the same. Thus, the weight distribution of the sound-emitting panel 000 is uniform.

In the embodiment of the present application, there are many possible implementations of the arrangement of the first sub-honeycomb core layer 101 and the two second sub-honeycomb core layers 102. The embodiment of the present application is schematically illustrated by taking the following three possible implementation manners as examples:

in a first possible implementation manner, as shown in fig. 10, fig. 10 is a schematic diagram of an arrangement manner of a first sub-honeycomb core layer and two second sub-honeycomb core layers provided in an embodiment of the present application. The two second sub-honeycomb core layers 102 and the first sub-honeycomb core layer 102 located between the two second sub-honeycomb core layers are arranged along the direction of the long side of the rectangle.

In a second possible implementation manner, as shown in fig. 11, fig. 11 is a schematic view of another arrangement manner of a first sub-honeycomb core layer and two second sub-honeycomb core layers provided in an embodiment of the present application. The two second sub-honeycomb core layers 102 and the first sub-honeycomb core layer 102 located between the two second sub-honeycomb core layers are arranged along the direction of the short side of the rectangle.

In a third possible implementation manner, as shown in fig. 12, fig. 12 is a schematic diagram of an arrangement manner of a first sub-honeycomb core layer and two second sub-honeycomb core layers provided in an embodiment of the present application. The orthographic projection of the first sub-honeycomb core layer 101 on the first skin 200 is an isosceles triangle, the bottom edge of the isosceles triangle coincides with one long edge of the rectangle, and the length of the short edge of the isosceles triangle higher than the rectangle is equal. The orthographic projection of each second sub-honeycomb core layer on the first skin 200 is a right triangle, one right-angle side of the right triangle is overlapped with one short side of the rectangle, and the other right-angle side of the right triangle is overlapped with the other long side of the rectangle.

To sum up, the sound board that this application embodiment provided includes: honeycomb core layer, first skin and second skin. The honeycomb core layer is in a rectangular plate shape. Because the orthographic projection of the honeycomb core in the honeycomb core layer on the first skin or the second skin is a hexagonal annular ring, and the absolute value of the difference value of the angles of the first included angle and the second included angle is larger than or equal to a first preset angle, the arrangement density of the honeycomb core walls in the honeycomb core is larger than the arrangement density of the honeycomb core walls in the honeycomb core along the long side x direction of the rectangle along the short side y direction of the rectangle. Thus, the transmission performance of the sound-emitting panel in the x direction and the y direction is greatly different. In the projection screen prepared by the subsequent sound-emitting board, the sound-emitting board is driven by the exciter to vibrate to emit sound with a wider frequency response range, so that the sound-emitting effect of the projection screen is improved.

The embodiment of the application also provides a projection screen. Illustratively, as shown in fig. 13 and 14, fig. 13 is a schematic structural diagram of a projection screen provided in an embodiment of the present application, and fig. 14 is an exploded view of the projection screen shown in fig. 13. The projection screen 010 may include: a sound-emitting panel 000, a display functional layer 001, and an actuator 002.

The sound board 000 may be the sound board in the above-described embodiment.

The display functional layer 001 is connected to the side of the first skin 200 of the sound-emitting panel 000 facing away from the honeycomb core layer 100. In this application, a structure in which the display functional layer 001 and the sound-emitting panel 000 are connected to each other may be referred to as a sound-emitting panel.

It should be noted that, since the first sub-honeycomb core layer 101 and the two second sub-honeycomb core layers 102 in the honeycomb core layer 100 in the sound-emitting panel 000 are coplanar with the surface of the sound-emitting panel 000 in contact with the first skin 200, the first skin 200 in the sound-emitting panel 000 can satisfy the optical flatness of the display functional layer 001 bonded thereto.

The exciter 002 is connected to the side of the second skin 300 of the sound-emitting panel 000 away from the honeycomb core layer 100, and the exciter 002 is used for driving the sound-emitting panel 000 to vibrate to emit sound.

In the present application, the number of the actuators 002 in the projection screen 010 may be plural. There are many possible implementations of the position of the orthographic projection of the plurality of actuators 002 on the second skin 300 in the sound-emitting panel 000. The embodiment of the present application is schematically illustrated by taking the following three possible implementation manners as examples:

in a first possible implementation, the orthographic projection of the plurality of drivers 002 on the honeycomb core 100 in the sound-emitting panel 000 may be located in the area of the first sub-honeycomb core 101 in the honeycomb core 100.

In a second possible implementation, the orthographic projection of the plurality of actuators 002 on the second skin 300 may be located within the orthographic projection of the second sub-honeycomb core layer 102 in the honeycomb core layer 100 on the second skin 300.

In a third possible implementation, the orthographic projections of the plurality of actuators 002 on the second skin 300 may be partially located within the orthographic projection of the first sub-honeycomb core layer 101 in the honeycomb core layer 100 on the second skin 300, and partially located within the orthographic projection of the second sub-honeycomb core layer 102 in the honeycomb core layer 100 on the second skin 300.

Illustratively, actuator 002 in projection screen 010 can be electrically connected to a laser projection device that can, in operation, send acoustic electrical signals to actuator 002. The exciter 002 receives the sound electric signal and then performs a reciprocating motion based on the sound electric signal, so that the entire surface of the sound board 000 can vibrate together, the sound board 000 can sound, and the projection screen 010 can generate sound when the laser projection apparatus works.

In the present application, as shown in fig. 15, fig. 15 is an effect diagram of a case where a sound-emitting panel according to an embodiment of the present application is in a multi-mode, and when the exciter 002 operates, since the honeycomb core layer 100 is present in the sound-emitting panel 002, sound generated by vibration of the sound-emitting panel 002 is in a multi-mode over the entire surface of the sound-emitting panel 000, so that the sound-emitting panel 000 can be vibrated at a plurality of positions in a face-to-face manner, and the front surface of the sound-emitting panel 000 can generate sound.

The display function layer 001 in the projection screen 010 may be a circular fresnel optical film, a black grid screen, a white plastic screen, or the like. When the display function layer 001 in the projection screen 010 is a circular fresnel optical film, a micromirror reflection structure is provided in the display function layer 001 in the projection screen 010, and the micromirror reflection structure can reflect light emitted from the laser projection apparatus in a specific direction. Therefore, the light reflected by the micro-mirror reflection structure can reach the eyes of a user to the maximum extent, so that the user can watch a clearer picture. Illustratively, the thickness of the display functional layer 001 may range from 0.5 mm to 1.7 mm. For example, the thickness of the display functional layer 001 may be 1.0 mm.

Illustratively, as shown in fig. 13 and 14, the display function layer 001 may be bonded to the first skin in the sound-emitting panel 000 through the third adhesive layer 003. The third adhesive layer 003 can be an adhesive such as glue, an adhesive film or a double-sided adhesive. The thickness of the third adhesive layer 003 may be in a range of 0.1 mm to 1 mm. For example, the thickness of the third adhesive layer 003 may be 0.5 mm.

In this embodiment, referring to fig. 13 and 14, the projection screen 010 may further include: and a frame body 004. The frame body 004 can be connected to the edge of the sound emission panel composed of the display function layer 001 and the sound emission panel 000. As an example, the frame 004 may be a ring-shaped frame that matches the shape of the sound-emitting panel.

The sound screen formed by the display function layer 001 and the sound board 000 in the projection screen 010 may have a rectangular plate shape, and the frame 004 in the projection screen 010 may include: and four strip structures which correspond to the four edges of the sound production screen one by one. The four strip-shaped structures are sequentially connected end to form a rectangular frame body matched with the sounding screen in shape. For example, any two adjacent strip-shaped structures may be connected by an L-shaped connector, and the connector may be fastened to the strip-shaped structures by screws. The material of the frame 004 in the projection screen 010 may be plastic, aluminum alloy, magnesium alloy, or the like. In this application, every strip structure has the joint groove, and every strip structure can with the marginal joint that corresponds in the sound production screen to realize being connected between framework 004 and the sound production screen.

In the projection screen 010, since the frame 004 is connected to the edge of the sound screen composed of the display function layer 001 and the sound board 000, stress is small at the edge of the sound screen, and a stress concentration phenomenon occurs in the central area of the sound screen. And in this application, the thickness of the first sub-honeycomb core layer 101 located in the central area of the sound-emitting panel 000 is greater than the thickness of the second sub-honeycomb core layers 102 located on both sides of the sound-emitting panel, and then the first sub-honeycomb core layer 101 can effectively alleviate the stress concentration phenomenon in the central area of the projection screen 010, and plays a certain supporting role in the central area of the sound-emitting screen, so that the probability of deformation in the central area of the sound-emitting screen is reduced, and then 001 optical flatness of the display function layer is ensured, and the display effect of the projection screen 010 is improved.

In the embodiment of the present application, when the exciter 002 in the projection screen 010 works, the exciter 002 can drive the sound board 000 to generate physical displacement and deformation, so that the sound board 000 can generate sound. Since the sound-emitting panel 000 is bonded to the display functional layer 001, when the sound-emitting panel 000 is physically displaced and deformed, the sound-emitting panel 000 applies a force to the display functional layer 001. When the display functional layer 001 is applied with a force from the sound-emitting panel 000, a contact portion between the display functional layer 001 and the chassis 004 is easily damaged.

For this reason, a damper structure 005 may be provided at a position where the frame body 004 contacts the display functional layer 001, and the probability of damage occurring when a portion where the display functional layer 001 contacts the frame body 004 receives an urging force of the sound-emitting panel 000 can be reduced by the damper structure 005. For example, the material of the shock absorbing structure 005 may be a damping material such as butyl rubber or polyurethane foam.

In the embodiment of the present application, as shown in fig. 13 and 14, the projection screen 010 may further include: a strip-shaped cover plate 006. Both ends of this cover plate 006 are connected with the frame 004 respectively, and the exciter 002 is located between the sound generating plate 000 and the cover plate 006, and the exciter 002 is connected with the cover plate 006. The cover plate 006 may serve as a support reinforcement on the frame 004 and may serve to shield the exciter 002.

As shown in fig. 13 and 14, the number of the cover plates 006 in the projection screen 010 may be two, and the projection screen 010 may further include: and a bar-shaped support plate 007 located between the two cover plates 006. Both ends of the supporting plate 007 may be connected to the frame 004. The supporting plate 007 can support the acoustic panel 000 in the projection screen 010, so that the phenomenon that the center of the acoustic panel 000 collapses is prevented, and the stability of the projection screen 010 is improved.

As an example, the two cover plates 006 and the support plate 007 in the projection screen 010 have parallel longitudinal directions. And both ends of each cover plate 006, and both ends of the support plate 007 may be connected to the frame body 004 by screws. Alternatively, shock absorbing layers may be provided at positions where both ends of each cover plate 006, and both ends of the support plate 007 contact the frame 004, and the thickness of the shock absorbing layers may range from 0.5 mm to 0.8 mm. The shock-absorbing layer may be made of materials including: acrylic acid sub-sensitive adhesive tape, similar adhesive tape, silica gel pad or foam, etc. This buffer layer can reduce the board 000 that sounds under the effect of vibration, leads to appearing colliding and producing the probability of noise between apron 006 and the framework 004, further improvement the audio of the sound that projection screen 010 made.

In the embodiment of the present application, the plurality of actuators 002 between the cover plate 006 and the sound emitting plate 000 in the projection screen 010 may be bonded to the cover plate 006 through a vibration damping adhesive layer, so as to achieve a fastening connection between the actuators 006 and the cover plate 006 in the display device 000.

By way of example, when the exciter 002 is bonded to the cover plate 006 through the vibration-damping adhesive layer, hard contact between the exciter 002 and the cover plate 006 can be prevented, and an acting force applied to the cover plate 006 by the exciter 002 in the working process is reduced, so that the probability of the mechanical vibration phenomenon of the cover plate 006 in the working process of the exciter 002 is reduced, the volume of noise generated when the mechanical vibration phenomenon occurs in the cover plate 006 can be reduced, and the sound effect of the sound generated by the projection screen 010 is improved.

The structure of the damping adhesive layer in the embodiments of the present application is schematically described by taking the following two cases as examples:

in a first aspect, the shock absorbing adhesive layer may include: the shock attenuation bubble is cotton to and be located the double faced adhesive tape of the cotton both sides of this shock attenuation bubble. This shock attenuation bubble is cotton to be passed through the double faced adhesive tape with exciter 002 and bonds, and this shock attenuation bubble is cotton also can bond through the double faced adhesive tape in with apron 006. There is a gap between the exciter 002 and the cover plate 006, and the shock-absorbing foam may be filled in the gap. The thickness of the shock absorbing foam may range from 0.2 mm to 0.5 mm.

In a second aspect, the shock absorbing adhesive layer may include: a modified rubber material layer. The layer of modified rubber material may have a thickness of 2 mm to 2.5 mm. The modified rubber material layer has good flexibility and good adhesion. The modified rubber material layer also has the characteristics of high temperature resistance and low temperature resistance. For example, the modified rubber material layer is not easy to drip at high temperature and is not easy to harden and fall off at low temperature, and the modified rubber material layer can satisfy the use environment of the projection screen 010 in the laser projection system. Meanwhile, the modified rubber material layer can ensure certain elasticity and can better play a role in buffering in the reciprocating motion process of the exciter 002.

In the present application, the plurality of actuators 002 between the cover plate 006 and the sound panel 000 in the projection screen 010 may be fixedly connected to the surface of the sound panel 000 that is far from the display function layer 001 by bonding. For example, the adhesive layer between the exciter 002 and the sound-emitting panel 000 may include: and adhesives such as foam adhesive, glue, adhesive film or double-sided adhesive.

Optionally, as shown in fig. 13 and 14, the projection screen 010 may further include: the bracket 008 is suspended. The suspension bracket 008 may include: a sheet-shaped hook connected with the frame body 004, and a sheet-shaped fixing part connected with the hook, wherein the fixing part can be fixedly connected with a wall through a fastening screw. The projection screen 010 can be hung on a wall by the hanging bracket 008.

Optionally, the material of the suspension bracket 008 may include: plastic, aluminum plastic plate, steel or carbon fiber composite plate and the like.

For example, the portion of the suspension bracket 008 contacting the frame 004 may be provided with a shock absorbing layer, and the thickness of the shock absorbing layer may be in a range of 0.5 mm to 0.8 mm. The shock-absorbing layer may be made of materials including: acrylic acid sub-sensitive adhesive tape, similar adhesive tape, silica gel pad or foam, etc. This buffer layer has improved the stability that this projection screen 010 hung on the wall, simultaneously, can also reduce sounding board 000 under the effect of vibration, leads to appearing the collision and produce the probability of noise between suspension bracket 008 and the framework 004, further improvement the audio that projection screen 010 sent sound.

To sum up, the projection screen provided by the embodiment of the present application includes: a sound board, a display function layer and an exciter. Because the orthographic projection of the honeycomb core in the honeycomb core layer in the sound-emitting plate on the first skin or the second skin is in a hexagonal annular shape, and the absolute value of the difference value of the angles of the first included angle and the second included angle is larger than or equal to a first preset angle, the arrangement density of the honeycomb core walls in the honeycomb core is larger than the arrangement density of the honeycomb core walls in the honeycomb core in the Y direction of the short side of the rectangle in the x direction of the long side of the rectangle. Thus, the transmission performance of the sound-emitting panel in the x direction and the y direction is greatly different. In the projection screen prepared by the subsequent sound-emitting board, the sound-emitting board is driven by the exciter to vibrate to emit sound with a wider frequency response range, so that the sound-emitting effect of the projection screen is improved.

The embodiment of the application also provides a laser projection system, and the laser projection system can be an ultra-short-focus laser projection system. For example, as shown in fig. 16, fig. 16 is a schematic structural diagram of a laser projection system according to an embodiment of the present application. The laser projection system may include: a projection screen 010 and a laser projection device 020. The projection screen 010 may be the projection screen in the above-described embodiment. The laser projection device 020 can be electrically connected to an actuator in the projection screen 010.

Thus, when the laser projection device 020 works, the laser projection device 010 can emit light rays obliquely upwards, so that the laser projection device 020 can project pictures to the projection screen 010; the laser projection device 020 can also send acoustic electrical signals to an actuator in the projection screen 010 so that the projection screen 010 can sound while displaying the projected picture.

In this application, 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" means two or more unless expressly limited otherwise.

The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.

Claims (7)

1. A sound board, comprising:

the honeycomb core layer, the first skin and the second skin are positioned on two sides of the honeycomb core layer, and the first skin and the second skin are connected with the honeycomb core layer;

the honeycomb core layer is provided with a plurality of honeycomb cores, the orthographic projection shape of each honeycomb core on the first skin or the second skin is a hexagonal ring shape, the hexagonal ring shape is provided with four first included angles with the same angle and two second included angles with the same angle, and the absolute value of the difference value of the angles of the first included angle and the second included angle is larger than or equal to a first preset angle;

the first included angle is larger than the second included angle, and the sound-emitting plate is of a rectangular plate-shaped structure;

the hexagonal ring shape is provided with a symmetry axis parallel to the direction of the long edge of the sound-emitting plate, and the symmetry axis penetrates through two second included angles in the hexagonal ring shape;

wherein the arrangement density of the honeycomb core walls in the honeycomb core in the direction along the long side of the sound-emitting panel is less than the arrangement density of the honeycomb core walls in the honeycomb core in the direction along the short side of the sound-emitting panel;

wherein the honeycomb core layer comprises: the honeycomb structure comprises a first sub-honeycomb core layer and two second sub-honeycomb core layers positioned on two sides of the first sub-honeycomb core layer, wherein the two second sub-honeycomb core layers are connected with the first sub-honeycomb core layer;

the thickness of the first sub-honeycomb core layer is greater than that of the second sub-honeycomb core layer, one surface of the first sub-honeycomb core layer, which is in contact with the first skin, is coplanar with one surface of the second sub-honeycomb core layer, which is in contact with the first skin; the second skin is tightly attached to a second sub-honeycomb core layer in the honeycomb core layers, and the second skin is of a bent structure;

the first sub-honeycomb core layer is provided with a plurality of first honeycomb cores with the same shapes, the second sub-honeycomb core layer is provided with a plurality of second honeycomb cores with the same shapes, each first honeycomb core is in an orthographic projection of a hexagonal first ring shape on the first skin, each second honeycomb core is in an orthographic projection of a hexagonal second ring shape on the first skin, the inner side length of the first ring shape is smaller than the inner side length of the second ring shape, and the arrangement density of the second honeycomb cores in the second sub-honeycomb core layer is smaller than the arrangement density of the first honeycomb cores in the first sub-honeycomb core layer.

2. The sound-emitting panel according to claim 1,

the absolute value of the difference value of the angles of the first included angle and the second included angle is smaller than or equal to a second preset angle.

3. The sound-generating panel according to claim 2,

the first preset angle is 30 degrees, and the second preset angle is 120 degrees.

4. The sound-emitting panel according to claim 1,

the first honeycomb core has a wall thickness greater than a wall thickness of the second honeycomb core.

5. The sound-emitting panel according to claim 1,

the sound board further includes: and the partition plate is positioned between the first sub-honeycomb core layer and each second sub-honeycomb core layer, and the first sub-honeycomb core layer and the second sub-honeycomb core layer are connected with the partition plate.

6. The sound-emitting panel according to claim 1,

the orthographic projection area of each second sub-honeycomb core layer on the first skin is the same.

7. A projection screen, comprising:

a sound board, the sound board comprising: the sound board of any one of claims 1 to 6;

the display functional layer is connected with one side, far away from the honeycomb core layer, of the first skin in the sound-emitting plate;

and the exciter is connected with one side, far away from the honeycomb core layer, of the second skin in the sound production plate, and is used for driving the sound production plate to vibrate so as to produce sound.

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