CN112383762A

CN112383762A - Projection screen and laser projection system

Info

Publication number: CN112383762A
Application number: CN202011254022.2A
Authority: CN
Inventors: 张健; 周辉
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-02-19
Anticipated expiration: 2040-11-11
Also published as: CN112383762B

Abstract

The application discloses projection screen and laser projection system belongs to the laser projection field. The projection screen includes: the frame body is clamped at the edge of the sound production screen, the first buffer layer is positioned between the frame body and the projection surface of the sound production screen, and the second buffer layer is positioned between the frame body and the back surface of the sound production screen; the elastic supporting part is positioned between the side face of the sound-generating screen and the frame body, the elastic supporting part, the first buffer layer and part of the frame body form a first moving space, and the elastic supporting part, the second buffer layer and part of the frame body form a second moving space; the exciter is connected with the back of the sound-emitting screen and is used for driving the sound-emitting screen to vibrate to emit sound; when the sound production screen vibrates, the volume of the first activity space and/or the second activity space changes, so that a larger and more flexible space can be provided for the vibration of the sound production board, and the sound production effect of the projection screen and the projection system can be improved.

Description

Projection screen and laser projection system

Technical Field

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

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. For example, referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a projection screen provided in the related art, and fig. 2 is an exploded view of the projection screen shown in fig. 1. The projection screen may include: the sound screen 01, the frame 02, the cover 03 and the exciter 04. The sound screen 01 may include: an optical curtain sheet 011 and a sound board 012, and a curtain sheet adhesive layer (not shown) between the optical curtain sheet 011 and the sound board 012. The frame body 02 may surround the periphery of the sound screen 01 and be connected to the edge of the sound screen 01. The cover plate 03 may be strip-shaped, and both ends of the cover plate 03 are connected to the frame 02. The driver 04 is located between the sound screen 01 and the cover plate 03, and the driver 04 is bonded to the surface of the sound board 012 of the sound screen 01, which is away from the optical screen sheet 011. The exciter 04 may vibrate with the sound board 012 provided in the sound-emitting panel 01 to emit sound.

Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of a connection between a sound screen and a frame body provided in the related art, and fig. 4 is a schematic diagram of a positional relationship between the sound screen and foam shown in fig. 3, and foam 05 can be wrapped around an edge of the sound screen 01, so that the frame body 02 is clamped with the edge of the sound screen 01 through the foam 05, and hard contact between the sound screen 01 and the frame body 02 can be avoided through the foam 05.

However, the applicant has found that the projection screen has a poor sound production effect when verifying the above technical solution.

Disclosure of Invention

The embodiment of the application provides a projection screen and a laser projection system. The problem of projection screen's among the prior art relatively poor sound production effect can be solved, technical scheme is as follows:

in one aspect, a projection screen is provided, comprising: the front surface of the sound production screen is a projection surface;

the frame body is clamped at the edge of the sound production screen, the first buffer layer is positioned between the frame body and the projection surface of the sound production screen, and the second buffer layer is positioned between the frame body and the back surface of the sound production screen;

the elastic supporting part is positioned between the side face of the sound-generating screen and the frame body, the elastic supporting part, the first buffer layer and part of the frame body form a first moving space, and the elastic supporting part, the second buffer layer and part of the frame body form a second moving space;

the exciter is connected with the back of the sound-emitting screen and is used for driving the sound-emitting screen to vibrate to emit sound;

when the sound-emitting screen vibrates, the volume of the first activity space and/or the second activity space changes.

In another aspect, there is provided a laser projection apparatus including: the laser projection equipment, the projection screen applying the technical scheme and the laser equipment are used for projecting image beams to the projection screen and are electrically connected with an exciter in the projection screen.

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

the projection screen may include: the sounding screen comprises a sounding screen body, a first buffer layer, a second buffer layer and an elastic supporting portion, wherein the first buffer layer, the second buffer layer and the elastic supporting portion are located between different surfaces of the frame body and the sounding screen body. This elastic support portion encloses with the different parts of first buffer layer, second buffer layer and framework respectively and closes and constitutes different first activity space and second activity space to in the space, elastic support portion and first buffer layer, second buffer layer are not connected. When the sound production screen vibrates around carrying out, the above-mentioned first activity space that encloses to close formation, the change of volume space all can take place for the second activity space, like this, and the amplitude in the vibration direction receives less restriction, perhaps says so, has had bigger and more nimble deformation allowance, and then can improve the sound production effect of this projection screen.

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 diagram of a projection screen provided in the related art;

FIG. 2 is an exploded view of the projection screen shown in FIG. 1;

fig. 3 is a schematic structural diagram of a joint between a sound screen and a frame body provided in the related art;

FIG. 4 is a schematic view of the positional relationship between the sound-generating screen and the foam shown in FIG. 3;

fig. 5 is a schematic view of a positional relationship between a sound board and foam provided in the related art;

fig. 6 is a schematic structural diagram of a projection screen according to an embodiment of the present disclosure;

FIG. 7 is an exploded view of the projection screen shown in FIG. 6;

FIG. 8 is a schematic view of FIG. 6 showing the construction of the connection between the sound screen and the housing of the projection screen;

FIG. 9 is a schematic diagram of another projection screen according to an embodiment of the present disclosure;

FIG. 10 is an exploded view of the projection screen shown in FIG. 9;

fig. 11 is an effect diagram of a sound board provided by an embodiment of the present application in a multi-mode;

fig. 12A is a sectional view of a frame in the projection screen shown in fig. 9;

fig. 12B is a sectional view of another frame in the projection screen shown in fig. 9;

FIG. 13 is a schematic view of the attachment of the sound screen to the frame of the projection screen shown in FIG. 9;

fig. 14 is a schematic view of the positional relationship between the sound screen shown in fig. 9 and the elastic support portion, the first buffer layer, and the second buffer layer;

FIG. 15 is an enlarged view of a portion of a sound screen attached to a frame according to an embodiment of the present disclosure;

FIG. 16 is an enlarged view of a portion of another attachment of the sound screen to the frame provided by an embodiment of the present application;

FIG. 17 is an enlarged view of a portion of a further example of a sound screen attached to a frame according to an embodiment of the present disclosure;

FIG. 18 is a schematic view of a position of an elastic support in a sliding slot according to an embodiment of the present disclosure;

FIG. 19A is a schematic view of a position of the elastic support in the sliding groove according to the embodiment of the present application;

fig. 19B is a schematic view of another position of the elastic support portion in the sliding groove according to the embodiment of the present application;

FIG. 20 is a schematic structural diagram of a further sound screen and frame connection provided in an embodiment of the present application;

FIG. 21 is a schematic diagram of the construction of the cover plate in the projection screen shown in FIG. 9;

fig. 22 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. 6 and 7, fig. 6 is a schematic structural diagram of a projection screen according to an embodiment of the present application, and fig. 7 is an exploded view of the projection screen shown in fig. 6. The projection screen 000 may include:

a sound screen 100, a frame assembly 200, and an actuator 300.

The sound screen 100 may include: optical curtain sheets and sound boards. The front surface of the sound screen 100 is a projection surface, and the laser projection device can project an image beam to the projection surface of the sound screen 100 and form a picture.

The frame assembly 200 includes: the buffer structure comprises a frame body 201, an elastic supporting part 202, a first buffer layer 203 and a second buffer layer 204. In order to clearly see the structure of the frame assembly 200 and the positional relationship between the frame assembly 200 and the sound screen 100, please refer to fig. 8, and fig. 8 is a schematic structural diagram illustrating the connection between the sound screen and the frame body in the projection screen in fig. 6. Frame 201 is the centre gripping in the edge of sound production screen 100, and first buffer layer 203 is located between the projection plane of frame 201 and sound production screen 100, and second buffer layer 203 is located between the back of frame 201 and sound production screen 100, and the back of sound production screen is the one side of keeping away from the projection plane of sound production screen 100 promptly. And the side surfaces of the sound-emitting screen, i.e., the surfaces extending in the thickness direction perpendicular to both the back surface and the front surface of the sound-emitting screen. In this example, the elastic support portion 202, the first buffer layer 203 and the partial frame body 201 form a first movable space V1, and the elastic support portion 202, the second buffer layer 204 and the other partial frame body 201 form a second movable space V2, and since the dimension of the elastic support portion 202 in the thickness direction of the sound screen 100 is smaller than the thickness value of the sound screen 100, different surface portions of the side surfaces of the sound screen 100 also participate in enclosing the first movable space V1 and the second movable space V2. Thus, the elastic support 202 is spatially unconnected to the first and second buffer layers 203 and 204 by a spatial distance.

Actuator 300 in projection screen 000 may be coupled to the side of sound screen 100 remote from its projection surface. The exciter 300 is used to drive the sound-emitting screen 100 to vibrate to emit sound. For example, the exciter 300 may be connected to a sound board in the sound screen 100, which may drive the sound board to vibrate, so that the sound board in a vibrating state may emit sound.

In the related art, referring to fig. 3, 4 and 5, when the projection screen is hung, a glass fiber skin 012b in a sound board 012 is embedded in a foam 05 by gravity, the foam 05 is extruded by the glass fiber skin 012b to extend into an aluminum honeycomb core layer 012a, and the edge of the sound board 012 is fixed in the foam 05. When the exciter 04 in the projection screen is operated, the exciter 04 drives the sound board 012 in the sound screen 01 to vibrate. Since the edge of the sound-emitting panel 012 is fixed to the foam 05, the foam 05 restricts the amplitude of vibration of the sound-emitting panel 012 at the edge.

In the embodiment of the present application, the elastic support 202 located between the side surface of the sound-emitting panel 100 and the frame 201 is not connected to the first buffer layer 203 located between the projection surface of the sound-emitting panel 100 and the frame 201, and the second buffer layer 204 located between the back surface of the sound-emitting panel 100 and the frame 201, and has the first movable space V1 and the second movable space V2, respectively.

On the one hand, the width of the elastic support portion 202 in the thickness direction of the sound screen 100 is reduced compared to the related art, and specifically, the width of the elastic support portion 202 in the thickness direction of the sound screen 100 is smaller than the thickness of the sound board in the sound screen 100. On the one hand, when this projection screen 000 hangs, can avoid the sound screen because the action of gravity leads to the glass fiber skin in the sound board to imbed in elastic support portion 202, improve or avoid appearing the marginal portion "fall into" parcel of sound board in the buffering bubble is cotton, and the cotton scalable volume of bubble reduces, the phenomenon of sound screen "vibration not moving". And on the other hand is, among the correlation technique, the cotton trilateral edge or the one end department of embracing the sound screen of bubble, add production man-hour and usually realize the parcel with a monoblock bubble cotton, but will cause like this when the sound screen vibration extrudees the bubble cotton of a side, also have the drive effect to the bubble cotton of two other sides, and under the integral structure form, the bubble cotton of two outer two sides forms the hindrance effect to the vibration direction, also can lead to taking place the screen amplitude and weaken, or the phenomenon of "the motionless" that shakes.

In this example, when the sound-emitting panel is driven by the exciter 300 to vibrate, due to the existence of the first active space V1 and the second active space V2, the amplitude of the sound-emitting panel is greatly limited when the sound-emitting panel vibrates, or the sound-emitting panel has a larger and more flexible space for allowing the amplitude to become larger, and the space does not form a barrier to the vibration of the sound-emitting panel, but provides a larger deformation allowance space. Since the elastic support 202 is not in contact with the first buffer layer 203 and the second buffer layer 204, but has a spatial distance, the deformation space of the elastic support 202 is larger and can extend toward the first active space V1 or the second active space V2 after being deformed, so that the problem of amplitude of the sound-generating screen during vibration can be particularly improved, and the sound-generating effect of the projection screen 000 can be greatly improved by solving the problem.

To sum up, the projection screen that this application embodiment provided, because elastic support portion and first buffer layer, second buffer layer have the distance in space, do not have the relation of connection, but enclose the partial side of closing by the internal surface of part framework, sound production screen respectively again and form the activity space, like this, this elastic support portion reduces at the ascending width in the thickness direction of sound production screen, specifically, this elastic support portion is less than the thickness of this sound production screen at the ascending width in the thickness direction of sound production screen. On the one hand, when this projection screen hangs, can avoid in the glass fiber covering embedding elastic support portion in the acoustic board, avoid appearing the marginal "being absorbed in" the problem in the elastic buffer material layer of acoustic board, on the other hand, no longer adopt the buffer layer of the cotton material of full bubble of integration, can break off the power of dragging between the different sides, weaken or eliminate the hindrance of vocal screen vibration, thereby when the acoustic board vibrates under the drive of exciter, the acoustic board has more nimble change allowance more greatly in the amplitude of vibration at the edge, can not receive the restriction, the sound producing effect of this projection screen has been improved.

In the embodiment of the present application, please refer to fig. 9 and 10, fig. 9 is a schematic structural diagram of another projection screen provided in the embodiment of the present application, and fig. 10 is an exploded view of the projection screen shown in fig. 9. The sound screen 100 in the projection screen 000 may include: an optical curtain sheet 101, a sound-emitting plate 102, and a curtain sheet adhesive layer (not shown) between the optical curtain sheet 101 and the sound-emitting plate 102. The optical sheet 101 may be bonded to the sound-emitting panel 102 by a sheet bonding layer. The side of the optical screen 101 remote from the sound board 102 is the projection surface of the sound screen 100, so that the actuator 300 connected to the side of the sound screen 100 remote from the projection surface can contact the sound board 102 in the sound screen 100. The exciter 300 may vibrate the sound board 102 of the sound screen 100 to generate sound, thereby allowing the projection screen 000 to generate sound.

Illustratively, actuators 300 in projection screen 000 may be electrically connected to a laser projection device that, in operation, sends acoustic electrical signals to actuators 300. After receiving the sound electrical signal, the exciter 300 may perform a reciprocating motion based on the sound electrical signal, so as to drive the entire surface of the sound generating plate 102 in the sound generating screen 100 to vibrate together, so that the sound generating plate 102 generates sound, and thus the projection screen 000 can generate sound when the laser projection apparatus works.

In the present application, the sound board 102 in the sound screen 100 may include: the aluminum honeycomb core comprises a plate-shaped aluminum honeycomb core layer and glass fiber skins positioned on two sides of the aluminum honeycomb core layer. The driver 300 may be in contact with one fiberglass skin of the sound board 102 while the other fiberglass skin needs to be bonded to the optical curtain sheet 101 by a curtain bonding layer. As shown in fig. 11, fig. 11 is an effect diagram of a sound board provided in an embodiment of the present application when the panel is in a multi-mode, when the exciter 300 is in operation, due to the presence of the aluminum honeycomb core layer in the sound board 102, sound generated by vibration of the sound board 102 is in a multi-mode on the entire surface of the sound board 102, so that the sound board 102 can vibrate at multiple positions in a face-to-face manner, and thus the front surface of the sound board 102 can generate sound. The sound board 102 may have a thickness ranging from 2 mm to 10 mm. For example, the thickness of the sound board 102 may be 5 mm.

The optical curtain sheet 101 of the sound screen 100 has a micro-mirror reflective structure therein, and the micro-mirror reflective structure can reflect light emitted from the laser projection device 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. By way of example, the optical curtain sheet 101 may include: circular fresnel optical film, black grid screen or white plastic screen, etc. The thickness of the optical curtain sheet 101 may range from 0.5 mm to 1.7 mm. For example, the thickness of the optical curtain sheet 101 may be 1.0 mm.

The screen sheet bonding layer in the sound screen 100 can be glue films or adhesives such as double-sided adhesive tapes. The thickness of the curtain bonding layer can be in the range of 0.1 mm to 1 mm. For example, the thickness of the curtain bonding layer may be 0.5 mm.

In the embodiment of the present application, please refer to fig. 12A and 12B. Fig. 12A and 12B are sectional views of the frame in the projection screen shown in fig. 9. The frame 201 may be an annular frame matching the shape of the sound screen 100, and the frame 201 further has an annular engaging groove 201 a. Illustratively, the clip groove 201a has three groove surfaces a, B and C connected in series.

In the embodiment of the present application, when the actuator 300 in the projection screen 000 is operated, the actuator 300 can drive the sound-generating plate 102 in the sound-generating screen 100 to physically displace and deform, so as to make the sound-generating plate 102 generate sound. Since the sound-emitting panel 102 of the sound-emitting panel 100 is bonded to the optical screen 101 through the screen bonding layer 103, the sound-emitting panel 102 applies a force to the optical screen 101 when the sound-emitting panel 102 is physically displaced and deformed. When the optical curtain sheet 101 is acted by the sound-emitting plate 102, if the optical curtain sheet 101 and the frame 201 are in direct contact, the optical curtain sheet 101 in the portion is easily damaged.

Therefore, in the present application, please refer to fig. 13, fig. 13 is a schematic diagram illustrating the connection between the sound screen and the frame body in the projection screen shown in fig. 9, wherein the frame body 201 is clamped at the edge of the sound screen 100 by the clamping groove 201 a. An elastic support 202, a first buffer layer 203 and a second buffer layer 204 are provided between the sound screen 100 and the frame 201. The elastic support 202, the first buffer layer 203, and the second buffer layer 204 can prevent hard contact between the sound screen 100 and the frame 201.

Elastic support portion 202, first buffer layer 203 and second buffer layer 204 are located joint groove 201a, and framework 201 passes through joint groove 201a and is located the edge of elastic support portion 202, first buffer layer 203 and the centre gripping of second buffer layer 204 in joint groove 201 at sound production screen 100 to realize being connected between framework 201 and sound production screen 100.

Alternatively, the sound-emitting screen 100 may have a rectangular plate shape. The frame 201 in the projection screen 000 may include: four stripe structures corresponding to the four edges of the sound screen 100 one to one. The four strip-shaped structures are sequentially connected end to form a rectangular frame body matched with the sound production screen in shape. For example, any two adjacent strip structures may be connected by an L-shaped connector, and the L-shaped connector may be fastened to the strip structures by screws. The material of the frame 201 in the projection screen 000 may be a metal material such as an aluminum alloy or a magnesium alloy.

For example, in order to more clearly see the positional relationship between the sound screen 100 and the elastic support portion 202, the first buffer layer 203, and the second buffer layer 204, please refer to fig. 13 and 14, and fig. 14 is a schematic diagram of the positional relationship between the sound screen and the elastic support portion, the first buffer layer, and the second buffer layer shown in fig. 9. The elastic support 202 is located between the side surface of the sound-emitting screen 100 and the groove surface a of the clamping groove 201a in the frame 201, the first buffer layer 203 is located between the projection surface of the sound-emitting screen 100 and the groove surface B of the clamping groove 201a in the frame 201, and the second buffer layer 204 is located between the back surface of the sound-emitting screen 100 and the groove surface C of the clamping groove 201a in the frame 201.

In the above-described embodiment of the present application, the cross section of the elastic support portion 202 is a circular shape, and the cross section is a cross-sectional direction along the thickness direction of the sound screen. When the cross section of the elastic support 202 is circular, the elastic support may have a column-shaped or rod-shaped configuration, and the extending direction thereof coincides with the longitudinal direction of the frame or the extending direction of the side surface of the sound-emitting panel.

Alternatively, the cross section of the elastic support portion 202 may be an elliptical shape or a spindle shape, and the above-described column-shaped or rod-shaped structure may be similarly employed.

Alternatively, when the cross section of the elastic support 202 is circular, the elastic support 202 may be a ball type made of an elastic material.

In the above example of the elastic support portion, the surface of the elastic support portion contacting the frame body and/or the surface of the elastic support portion contacting the side surface of the sound screen are both curved surfaces or arc surfaces, so that when the sound screen vibrates back and forth, the elastic support portion moves in a rolling or approximately rolling motion state, which is a free motion state, and does not limit or obstruct the deformation of the first buffer layer and the second buffer layer on the front surface and the back surface of the sound screen.

Correspondingly, fig. 12A illustrates a schematic cross-sectional structure of a frame, in which a contact surface between the frame 201 and the elastic support portion 202 is a plane, that is, an inner surface of the frame 201 and the elastic support portion 202 may be in point contact or line contact.

Fig. 12B illustrates a schematic cross-sectional structure of a frame, in which a contact surface between the frame 201 and the elastic support portion 202 is an arc surface, that is, an inner surface of the frame 201 and the elastic support portion 202 may be in surface contact or line contact.

As shown in fig. 13 and 14, the elastic support 202 has a circular cross section.

In this example, the elastic support 202 may be at least one of a cylindrical elastic structure and a ball-type elastic structure, and the elastic material may be silicon rubber or foam. The following examples are given by way of example of foam.

The elastic support 202 is in contact with the side walls or side surfaces of the frame 201 and the sound screen 100, respectively. In this way, the elastic support 202 can roll between the frame 201 and the sound screen 100 following the vibration of the sound board 102 in the sound screen 100, so that the sound board 102 can obtain a larger movement space.

For example, when the sound screen 100 in the projection screen 000 has a rectangular plate shape, the elastic support 202 between the frame 201 and one side surface of the sound screen 100 in the projection screen 000 may include: at least one cylindrical foam and/or at least two ball-type foams.

For example, in a possible implementation manner, as shown in fig. 15, fig. 15 is a partial enlarged view of a connection between a sound screen and a frame provided in an embodiment of the present application, and the elastic support 202 between the frame 201 and one side surface of the sound screen 100 in the projection screen 000 may include: at least one cylindrical foam 202a, each cylindrical foam 202a may have the same length direction as the side surface in contact therewith.

In another possible implementation manner, as shown in fig. 16, fig. 16 is a partial enlarged view of another sound-generating screen and frame connection provided in an embodiment of the present application, and the elastic support 202 between the frame 201 and one side surface of the sound-generating screen 100 in the projection screen 000 may include: at least two ball type foam 202b, the arrangement direction of the at least two ball type foam 202b is the same with the length direction of the side surface contacted with the ball type foam.

In yet another possible implementation manner, as shown in fig. 17, fig. 17 is a partial enlarged view of a connection between a sound screen and a frame provided in an embodiment of the present application, and the elastic support 202 between the frame 201 and one side surface of the sound screen 100 in the projection screen 000 may include: the foam structure comprises at least one cylindrical foam 202a and at least two ball-type foams 202b, wherein the length direction of each cylindrical foam 202a can be the same as the length direction of the side surface in contact with the cylindrical foam 202a, and the arrangement direction of the at least two ball-type foams 202b can be the same as the length direction of the side surface in contact with the ball-type foams 202 b.

In the present example, as shown in fig. 18, the surface of the frame 201 that contacts the elastic support portion 202 may have an arc-shaped slide groove 201b, and the elastic support portion 202 may be located in the slide groove 201 b. In this way, when the sound-emitting panel 102 is vibrated by the actuator 300, the elastic support 202 can roll in the sliding groove 201b along with the vibration of the sound-emitting panel 102. In this case, the elastic support 202 is more likely to roll in the housing 201, and the movement space of the sound-emitting panel 102 is further enlarged. Moreover, the elastic support part 202 rolls in the sliding groove 201b, so that the elastic support part 202 is always arranged between the sound production screen 100 and the frame body 201 in the vibration process of the sound production plate 102, hard contact between the sound production screen 100 and the frame body 201 is avoided, and the probability of damage to the sound production screen 100 in the vibration process of the sound production plate 102 is reduced.

As an example, the sound board 102 in the sound screen 100 has two states, a rest state and a vibration state.

When the actuator 300 in the projection screen 000 is not in operation, the sound board 102 in the sound screen 100 is in a stationary state; in the operation state of the actuator 300 in the projection screen 000, the sound-emitting panel 102 in the sound-emitting screen 100 is in a vibration state.

When the sound board 102 in the sound screen 100 is in a static state, as shown in fig. 18, fig. 18 is a schematic diagram of a position of an elastic support portion in a sliding slot according to an embodiment of the present application, and since the sound board 102 is in a static state, the elastic support portion 202 may be located in the sliding slot 201b, and the elastic support portion 202 is located in a middle position of the sliding slot 201 b. Thus, when the sound board 102 in the sound screen 100 is in a static state, the elastic support portion 202 can be ensured to be located at the middle position of the groove surface a of the clamping groove 201a in the frame 201, so that the elastic support portion 202 between the sound screen 100 and the frame 201 is uniformly stressed, and the tightness between the clamping groove 201a and the sound screen 100 is ensured.

When the sound board 102 in the sound screen 100 is in a vibrating state, the following two conditions exist in the positional relationship between the elastic support portion 202 and the slide groove 201 b:

in the first case, the exciter 300 in the projection screen 000 is in an operating state, and the exciter 300 can drive the sound-emitting panel 102 in the sound-emitting screen 100 to move toward the projection plane. In this case, as shown in fig. 19A, fig. 19A is a schematic diagram of the position of another elastic support part in the sliding groove provided in the embodiment of the present application, and since the sound emitting plate 102 moves toward the projection plane, the elastic support part 202 rolls in the sliding groove 201a toward the projection plane with the movement of the sound emitting plate 102, so that the elastic support part 202 is located in the sliding groove 201b at a position close to the projection plane, where the first movable space V1 is decreased in volume and the second movable space V2 is increased in volume.

In the second case, the exciter 300 in the projection screen 000 is in an operating state, and the exciter 300 can drive the sound-emitting panel 102 in the sound-emitting screen 100 to move away from the projection surface. In this case, as shown in fig. 19B, fig. 19B is a schematic diagram of a position of another elastic support portion in the sliding groove provided in the embodiment of the present application, and since the sound emitting plate 102 vibrates in a direction away from the projection surface, the elastic support portion 202 rolls in a direction away from the projection surface in the sliding groove 201B in accordance with the movement of the sound emitting plate 102, and the elastic support portion 202 is located in the sliding groove 202 at a position away from the projection surface. At this time, the first active space V1 increases in volume, and the second active space V2 decreases in volume. Therefore, due to the existence of the first movable space V1 and the second movable space V2, the elastic support 202 has a space capable of displacement, and the elastic support 202 can be displaced to change following the vibration of the sound screen, and at the same time, the displacement change of the elastic support 202 does not affect the deformation of the first buffer layer 203 and/or the second buffer layer 204.

Optionally, in order to ensure the compression resistance of the elastic support 202, the diameter of the elastic support 202 should not be too small, and meanwhile, in order to meet the assembly requirement of the sound-emitting screen 100 and the frame 201, the diameter of the elastic support 202 should not be too large, so the range of the diameter of the elastic support 202 is: 5 mm to 10 mm, and for example, the diameter of the elastic support 202 may be 7 mm.

In the above embodiments of the present application, the elastic support 202, the first buffer layer 203, and the second buffer layer 204 are made of different materials.

For example, the material of the elastic support 202 may include: silicone rubber or ethylene propylene diene series rubber. Both materials have a better resistance to compression. The hardness of the elastic support 202 is less than or equal to 30 degrees. For example, the elastic support 202 may be: a support of 7 mm diameter and 30 degrees hardness, made of silicone rubber or epdm series rubber, which is compressed by only 0.8 mm when subjected to a weight of 10 kg. Thus, when the sound screen 100 and the frame 201 are assembled, the elastic support portion 202 does not deform to a large extent due to the extrusion of the sound screen 100, and the elastic support portion 202 is guaranteed to be cylindrical or ball-shaped foam and can move in the sliding groove 201b along with the vibration of the sound board 102.

And, optionally, the materials of the first and second buffer layers 203 and 204 may include: shock attenuation bubble is cotton.

And, in another possible implementation, the elastic support 202 may also be a spring.

For example, please refer to fig. 20, fig. 20 is a schematic diagram of another connection between the frame body and the sound screen provided in the embodiment of the present application. The elastic support 202 between the frame 201 and one side surface of the sound screen 100 further includes: a spring 202 c. The frame 201 has a stopper groove 201 c. One end of the spring 202c is connected or contacted with the sound screen 100, and the other end is connected with the frame 201 through the limiting groove 201 c. The limiting groove 201c can be used for limiting the position of the spring 202c, and the spring 202c is ensured to be always positioned in the limiting groove 201c in the frame 201 in the vibration process of the sound generating plate 102 in the sound generating screen 100.

The spring 202c is a stiff spring having a large elastic coefficient. In this manner, it is ensured that spring 202c provides sufficient support for sound screen 100 to ensure that sound screen 100 is positioned in the central region of projection screen 000.

And in order to ensure the fixing of the frame body to the sound production screen, when the sound production screen is installed and fixed and does not produce sound through vibration, the spring is in a compressed state when being positioned between the side surface of the lower end of the sound production screen and the frame body due to the gravity action of the sound production screen. And when the sound screen vibrates back and forth to produce sound, the spring can be pulled to deform, but still is in a compressed state. The spring between the side surface of the upper end of the sound-emitting panel and the frame may be always in a compressed state.

Optionally, the materials of the first buffer layer 203 and the second buffer layer 204 may include: shock absorption foam or shock absorption rubber and the like.

In the embodiment of the present application, in order to prevent the first buffer layer 203 and the second buffer layer 204 from falling off from the frame body 201 during vibration of the sound screen 100, the first buffer layer 203 needs to be bonded to at least one of the frame body 201 and the sound screen 100, and the second buffer layer 204 needs to be bonded to at least one of the frame body 201 and the sound screen 100.

In the related art, please refer to fig. 3 or fig. 4, a long foam 05 needs to be bonded to the edge of the sound screen 01, in the bonding process, the foam 05 and the sound screen 01 are easily bonded in a partial area, and when the sound screen 01 is assembled with the frame 02, the foam 05 is easily dropped, so that the sound screen 01 is in hard contact with the frame 02, and the sound screen 01 is easily damaged in the vibration process. In addition, in recent years, the width of the design at the edge of the housing 02 is gradually reduced, and when the housing 02 is engaged with the edge of the sound screen 01, the foam 05 is easily exposed, which affects the appearance of the projection screen 000.

In the embodiment of the present application, the second buffer layer 204 may be bonded to the frame 201 and in contact with the sound screen 100. In this case, since the second buffer layer 204 located between the projection surface of the sound-emitting panel 100 and the frame 201 is bonded to the frame 201, the second buffer layer 204 can be prevented from falling off during the assembly of the sound-emitting panel 100 and the frame 201, thereby preventing the sound-emitting panel 100 and the frame 201 from being in hard contact with each other and reducing the probability of damage of the sound-emitting panel 100 during the vibration of the sound-emitting panel 102. Meanwhile, the second buffer layer 204 is bonded on the frame body 201, so that the second buffer layer 204 can be completely wrapped by the edge of the frame body 201, the condition that the second buffer layer 204 is exposed is avoided, and the attractiveness of the projection screen 000 is improved.

In the present application, when the second buffer layer 204 is bonded to the frame 201, the first buffer layer 203 may be bonded to the sound screen 100 and in contact with the frame 201 in order to facilitate the frame 201 to be held in the edge of the sound screen 100 by the engaging groove 201 a. Thus, when the first buffer layer 203 and the second buffer layer 204 are both bonded to the frame 201, when the frame 201 is clamped at the edge of the sound screen 100 through the clamping groove 201a, the sound screen 100 generates an upward acting force on the first buffer layer 203 and the second buffer layer 204, so that the first buffer layer 203 and the second buffer layer 204 fall off from the frame 201, and the sound screen 100 is in hard contact with the frame 201, thereby reducing the probability of damage to the sound screen 100 in the vibration process of the sound board 102.

Optionally, the first buffer layer 203 and the second buffer layer 204 may be bonded to the frame 201 or the sound screen 100 by using an adhesive such as glue, an adhesive film, or a double-sided adhesive.

In the embodiment of the present application, please refer to fig. 9 and 10, the projection screen may further include: the cover plate 400 is a strip-shaped cover plate, both ends of the cover plate 400 are respectively connected with the frame 201, the exciter 300 is positioned between the sound-emitting screen 100 and the cover plate 400, and the exciter 300 is connected with the cover plate 400.

For example, as shown in fig. 9 and 10, the number of the cover plates 400 in the projection screen 000 is two, and the projection screen 000 may further include: a strip-shaped support plate 500 positioned between the two cover plates 400. Both ends of the supporting plate 500 may be connected to the frame body 201 of the frame assembly 200. The supporting plate 500 may support the sound screen 100 of the projection screen 000, so as to prevent the sound screen 100 from collapsing in the center, and improve the stability of the projection screen 000.

Illustratively, the length directions of the two cover plates 400 and the length direction of the support plate 500 in the projection screen 000 are parallel. And both ends of each cover plate 400, and both ends of the support plate 500 may be connected to the frame body 201 of the frame assembly 200 by screws. Alternatively, cushions may be provided at both ends of each cover plate 400 and at positions where both ends of the support plate 500 contact the frame 201, and the thickness of the cushions may range from 0.5 mm to 0.8 mm. The cushioning pad material may include: acrylic acid sub-sensitive adhesive tape, similar adhesive tape, silica gel pad or foam, etc. The cushion pad can reduce the probability of noise caused by collision between the cover plate 400 and the frame 201 under the action of vibration of the sound-emitting plate 102 in the sound-emitting screen 100, and further improve the sound effect of sound emitted by the projection screen 000.

In the embodiment of the present application, as shown in fig. 21, fig. 21 is a schematic structural diagram of a cover plate in the projection screen shown in fig. 9. The cover plate 400 within the projection screen 000 has through slots 401, and the through slots 401 in the cover plate 400 may be located within a central region in the cover plate 400.

In the embodiment of the present application, the plurality of actuators 300 between the cover plate 400 and the sound screen 100 in the projection screen 000 may be bonded to the bottom surface a of the through slot 401 in the cover plate 400 through a shock-absorbing adhesive layer, so as to achieve a tight connection between the actuators 300 and the cover plate 400 in the projection screen 000.

For example, when the exciter 300 is bonded to the bottom surface a of the through groove 401 in the cover plate 400 through the vibration-damping adhesive layer, hard contact between the exciter 300 and the cover plate 400 may be prevented, and an acting force applied to the cover plate 400 by the exciter 300 during operation may be reduced, thereby reducing a probability of an engine vibration phenomenon occurring in the cover plate 400 during operation of the exciter 300, and also reducing a volume of noise generated by the cover plate 400 during the engine vibration phenomenon, thereby improving a sound effect of sound generated by the projection screen 000.

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. The shock absorption foam is bonded with the exciter 300 through double faced adhesive tape, and the shock absorption foam is bonded with the cover plate 400 through double faced adhesive tape. A gap exists between the exciter 300 and the cover plate 400, and a 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 less likely to drip at high temperatures and to harden and peel off at low temperatures, and can satisfy the use environment of the projection screen 000 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 300.

In the present application, the plurality of actuators 300 between the cover 400 and the sound screen 100 in the projection screen 000 may be fixedly connected to the surface of the sound screen 100 away from the optical sheet 101 by bonding. For example, the adhesive layer between the driver 300 and the sound screen 100 may include: and adhesives such as foam adhesive, glue, adhesive film or double-sided adhesive.

In summary, the projection screen provided by the above embodiments of the present application includes: a sound screen, a frame assembly, and an actuator. The frame assembly includes a frame body, and an elastic support portion between the sound-emitting screen side wall and the frame body. Because this elastic support portion, with the frame subassembly in lie in the first buffer layer between sound production screen projection face and the framework and lie in the second buffer layer between the one side of keeping away from sound production screen projection face and the framework and not connect with, consequently, can reduce this elastic support portion width on the thickness direction of sound production screen for this elastic support portion is less than the sound production plate thickness in this sound production screen at the width on the thickness direction of sound production screen. So, on the one hand when this projection screen hangs, can avoid among the correlation technique in the glass fiber skin embedding sound production screen side among the sound production board and the buffer layer structure between the framework, and the amplitude that leads to the sound production screen is by the problem of restriction, on the other hand, no longer adopt the buffer layer of the cotton material of full bubble of integration, adopt the discontinuous structural style in space, can break off the power of dragging between the elastic buffer structure between the different sides, weaken or eliminate the hindrance of sound production screen vibration and work as, when the sound production board vibrates under the drive of exciter, the sound production board can not receive the restriction at the edge amplitude that vibrates, can improve projection screen's vocal effect.

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. 22, fig. 22 is a schematic structural diagram of a laser projection system provided in an embodiment of the present application. The laser projection system may include: a projection screen 000 and a laser projection device 001. The projection screen 000 may be the projection screen in the above-described embodiment. The laser projection device 001 may be electrically connected to an actuator in the projection screen 000.

Thus, when the laser projection device 001 works, the laser projection device 001 can emit light rays obliquely upwards, so that the laser projection device 001 can project pictures to the projection screen 000; the laser projection device 001 may also send acoustic electrical signals to actuators in the projection screen 000 so that the projection screen 000 can sound while displaying a 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

1. A projection screen, comprising:

the front surface of the sound production screen is a projection surface;

the frame body is clamped at the edge of the sound-emitting screen, the first buffer layer is positioned between the frame body and the projection surface of the sound-emitting screen, and the second buffer layer is positioned between the frame body and the back surface of the sound-emitting screen;

the elastic support part is positioned between the side face of the sound-emitting screen and the frame body, the elastic support part, the first buffer layer and part of the frame body form a first movable space, and the elastic support part, the second buffer layer and part of the frame body form a second movable space;

the exciter is connected with the back surface of the sound-emitting screen and is used for driving the sound-emitting screen to vibrate so as to emit sound;

2. The projection screen of claim 1, wherein the first and second cushioning layers are made of different materials than the resilient support.

3. The projection screen of claim 1 wherein the cross-section of the flexible support is circular or elliptical or fusiform.

4. The projection screen of claim 3,

the surface of the frame body contacting with the elastic supporting part is an arc surface, or,

the surface of the frame body contacting the elastic supporting part is a plane.

5. The projection screen of claim 3 or 4, wherein the elastic support is a column or a rod, and the extension direction of the elastic support is the same as the extension direction of the frame or the side of the sound-emitting screen.

6. A projection screen according to claim 3 or 4, wherein the resilient support is in the form of a plurality of beads made of resilient material.

7. The projection screen of claim 1 wherein the resilient support is a spring.

8. The projection screen of claim 7, wherein one end of the spring is disposed in the retaining groove of the frame body, and the other end of the spring is connected to or in contact with the side surface of the sound-emitting screen.

9. The projection screen of any one of claims 1 to 8,

the first buffer layer is bonded to at least one of the frame and the sound-emitting screen, and the second buffer layer is bonded to at least one of the frame and the sound-emitting screen.

10. The projection screen of any one of claims 1 to 8,

the cross-section of framework is U type joint groove, elastic support portion first buffer layer with the second buffer layer all is located the joint inslot of U type, the framework passes through elastic support portion first buffer layer with the second buffer layer will the edge centre gripping of sound screen is in the joint inslot.

11. A laser projection system, comprising: a laser projection device for projecting an image beam onto the projection screen and electrically connected to an actuator in the projection screen, and the projection screen of any one of claims 1 to 10.