CN213338314U

CN213338314U - Projection screen and laser projection system

Info

Publication number: CN213338314U
Application number: CN202022605351.9U
Authority: CN
Inventors: 张健
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: 2021-06-01
Anticipated expiration: 2030-11-11

Abstract

The application discloses projection screen and laser projection system belongs to laser projection technical field. The projection screen may include: the sound generating device comprises a sound generating screen, a frame body, a cover plate and an exciter. The supporting part in the frame body is coplanar with one groove surface of the clamping groove in the clamping part, and the connecting part in the cover plate is close to the sound-emitting screen relative to the surface, connected with the exciter, in the cover plate. So, under the circumstances that guarantee that the apron can carry out effective centre gripping to the exciter for the thickness of framework is less, under this condition, if the distance between projection screen's in this application projection face and the wall, and the distance between projection screen's in the correlation technique projection face and the wall is the same, then the distance between the framework in this projection screen and the wall is great, so, sound that the sound board sent can be followed and spread better in the gap between the framework that spreads this projection screen and the wall, and then improved this projection screen's vocal effect.

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. 2 and 3, fig. 3 is a side view illustrating a connection of a projection screen to a wall according to the related art. The projection screen further includes: and the hanging bracket 05 is fixedly connected with the wall 00, and the projection screen can be fixed on the wall 00 through the hanging bracket 05.

In the related art, since the thickness of the exciter 04 is large, in order to smoothly clamp the exciter 04 by the cover plate 03 connected to the housing 02, it is necessary to thicken the portion of the housing 03 connected to the cover plate 03, which results in a large thickness d1 of the housing 02 as a whole, and a small distance a1 between the housing 02 and the wall 00.

Since the sound generated from the sound generating plate 012 can be transmitted not only through the optical curtain sheet 011 but also through a gap between the sound generating plate 012 and the wall 00 when the driver 01 drives the sound generating plate 012 to vibrate so as to make the sound generating plate 012 generate sound. Therefore, if the distance a1 between the frame 02 and the wall 00 in the projection screen is small, the sound generated by the sound-generating plate 012 is not easily transmitted through the gap, and the sound-generating effect of the projection screen is poor.

SUMMERY OF THE UTILITY MODEL

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, the projection screen comprising:

a sound screen;

a frame body, the frame body comprising: the clamping part is provided with a clamping groove clamped with at least part of the edge of the sound-emitting screen, and one surface of the supporting part, which is close to the sound-emitting screen, is coplanar with one groove surface of the clamping groove;

the two ends of the cover plate are provided with connecting parts, and the cover plate is connected with the supporting part in the frame body through the connecting parts;

the exciter is positioned between the cover plate and the sound-emitting screen, is respectively connected with the sound-emitting screen and the cover plate, and is used for driving the sound-emitting screen to vibrate to emit sound;

wherein the connecting part is close to the sound generating screen relative to the surface of the cover plate connected with the exciter.

In another aspect, a laser projection system is provided, comprising: the laser projection device is electrically connected with the 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 includes: the sound generating device comprises a sound generating screen, a frame body, a cover plate and an exciter. The supporting part in the frame body is coplanar with one groove surface of the clamping groove in the clamping part, and the connecting part in the cover plate is close to the sound-emitting screen relative to the surface, connected with the exciter, in the cover plate. So, under the circumstances that guarantee that the apron can carry out effective centre gripping to the exciter for the thickness of framework is less, under this condition, if the distance between projection screen's in this application projection face and the wall, and the distance between projection screen's in the correlation technique projection face and the wall is the same, then the distance between the framework in this projection screen and the wall is great, so, sound that the sound board sent can be followed and spread better in the gap between the framework that spreads this projection screen and the wall, and then improved this projection screen's vocal effect.

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 side view of a projection screen attachment to a wall provided by the related art;

fig. 4 is a schematic structural diagram of a projection screen according to an embodiment of the present application;

FIG. 5 is an exploded view of the projection screen shown in FIG. 4;

FIG. 6 is a schematic side view of the projection screen shown in FIG. 5;

FIG. 7 is a schematic cross-sectional view of a frame in the projection screen shown in FIG. 4;

fig. 8 is a schematic structural view of a frame in the projection screen shown in fig. 1;

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 a side schematic view of the attachment of the projection screen shown in FIG. 9 to a wall;

fig. 12 is an effect diagram of a sound board provided by an embodiment of the present application in a multi-mode;

fig. 13 is a schematic structural diagram of a cover plate according to an embodiment of the present disclosure;

FIG. 14 is a side schematic view of the cover plate shown in FIG. 13;

FIG. 15 is a schematic view of the attachment of the sound screen to the frame of the projection screen shown in FIG. 7;

fig. 16 is a schematic diagram of a position relationship between a sound screen and foam according to an embodiment of the present disclosure;

fig. 17 is a schematic structural view showing a frame in the projection screen of fig. 11;

FIG. 18 is a schematic diagram of the structure of the hanging bracket of FIG. 11 shown in the projection screen;

FIG. 19 is a schematic diagram of the structure of the hanging bracket shown in FIG. 3;

fig. 20 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.

Please refer to fig. 4, fig. 5 and fig. 6. Fig. 4 is a schematic structural diagram of a projection screen according to an embodiment of the present application, fig. 5 is an exploded view of the projection screen shown in fig. 4, and fig. 6 is a schematic structural side view of the projection screen shown in fig. 5. The projection screen 000 may include:

sound-emitting screen 100, frame 200, cover plate 300, and exciter 400.

The frame 200 may include: a clamping portion 201, and a supporting portion 202 connected with the clamping portion 201. To more clearly see the structure of the frame in fig. 4, please refer to fig. 7, and fig. 7 is a schematic cross-sectional view of the frame in the projection screen shown in fig. 4. The clamping portion 201 has a clamping groove 201a clamped with at least part of the edge of the sound screen 100, and one surface of the supporting portion 202 close to the sound screen 100 is coplanar with one groove surface of the clamping groove 201 a. Illustratively, the clip groove 201a has a groove surface a, a groove surface B and a groove surface C connected in sequence, and one surface of the support portion 202 near the sound screen 100 is coplanar with the groove surface C in the clip groove 201 a.

The cover plate 300 may be in a strip shape, two ends of the cover plate 300 are provided with connecting portions 301, and the cover plate 300 may be connected to the supporting portions 202 in the frame 200 through the connecting portions 301.

The exciter 400 is located between the cover plate 300 and the sound screen 100, and the exciter 400 is connected to the sound screen 100 and the cover plate 300, respectively, and the exciter 400 is used for driving the sound screen 100 to vibrate to generate sound.

Wherein the connection portion 301 of the cover plate 300 is close to the sound-emitting screen 100 with respect to the surface of the cover plate 300 connected to the exciter 400.

In the related art, as shown in fig. 3 and 8, fig. 8 is a schematic structural view of a frame body in the projection screen shown in fig. 1. The frame body 02 may include: a clamping part 021 connected with the sound screen 01 and a supporting part 022 connected with the cover plate 03. Since the thickness of the exciter 04 is large, in order to smoothly clamp the exciter 04 by the cover plate 03, a step structure e needs to be designed at a position where the engagement portion 021 and the support portion 022 are connected in the frame 02 to increase a distance between the surface of the support portion 022 connected to the cover plate 03 and the sound screen 01, thereby smoothly clamping the exciter by the cover plate 03. However, the step structure e results in a large overall thickness d1 of the housing 02 and a small distance a1 between the housing 02 and the wall 00.

Since the sound is diffused in a spherical manner around the sound source, when the exciter 01 drives the sound board 012 to vibrate so as to make the sound board 012 sound, the sound generated by the sound board 012 can not only be transmitted through the optical curtain sheet 011, but also be transmitted to a gap between the sound board 012 and the wall 00. Therefore, if the distance a1 between the frame 02 and the wall 00 in the projection screen is small, the sound generated by the sound-generating plate 012 is not easily transmitted through the gap, and the sound-generating effect of the projection screen is poor.

In the embodiment of the present application, the supporting portion 202 in the frame 200 is coplanar with the groove surface C in the clamping groove 201a in the clamping portion 201, that is, a step structure does not need to be designed at the position where the clamping portion 201 and the supporting portion 202 are connected in the frame 200. Meanwhile, the connection portion 301 of the cover plate 300 is located close to the sound-emitting screen 100 with respect to the side of the cover plate 300 connected to the exciter 400. In this way, the thickness d2 of the frame body 200 is made small while ensuring that the cover plate 300 can effectively clamp the exciter 400. In this case, if the distance between the projection surface of the projection screen 000 (i.e., the surface of the sound screen 100 away from the cover plate 300) and the wall in the present application is the same as the distance between the projection surface of the projection screen in the related art and the wall, the distance a2 between the frame body 200 and the wall 00 in the projection screen 000 is larger. In this way, the sound generated by the sound generating board 012 can be better transmitted through the gap between the frame 200 and the wall 00 of the projection screen 000, and the sound generating effect of the projection screen is further improved.

To sum up, the projection screen provided by the embodiment of the present application includes: the sound generating device comprises a sound generating screen, a frame body, a cover plate and an exciter. The supporting part in the frame body is coplanar with one groove surface of the clamping groove in the clamping part, and the connecting part in the cover plate is close to the sound-emitting screen relative to the surface, connected with the exciter, in the cover plate. So, under the circumstances that guarantee that the apron can carry out effective centre gripping to the exciter for the thickness of framework is less, under this condition, if the distance between projection screen's in this application projection face and the wall, and the distance between projection screen's in the correlation technique projection face and the wall is the same, then the distance between the framework in this projection screen and the wall is great, so, sound that the sound board sent can be followed and spread better in the gap between the framework that spreads this projection screen and the wall, and then improved this projection screen's vocal effect.

In the embodiment of the present application, please refer to fig. 9, 10 and 11, fig. 9 is a schematic structural diagram of another projection screen provided in the embodiment of the present application, fig. 10 is an exploded view of the projection screen shown in fig. 9, and fig. 11 is a schematic side view of the connection of the projection screen shown in fig. 9 fixed on a wall. 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 sound board 102 is close to the cover plate 300 with respect to the optical curtain sheet 101 so that the exciter 400 between the cover plate 300 and the sound screen 100 can be in contact with the sound board 102 in the sound screen 100. The exciter 400 may vibrate the sound board 102 in the sound screen 100 to generate sound, thereby allowing the projection screen 000 to generate sound.

Illustratively, actuators 400 in projection screen 000 may be electrically connected to a laser projection device that, in operation, sends acoustic electrical signals to actuators 400. After receiving the sound electrical signal, the exciter 400 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 400 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. 12, fig. 12 is an effect diagram of a multi-modal sound-emitting panel according to an embodiment of the present invention, when the exciter 400 operates, due to the presence of the aluminum honeycomb core layer in the sound-emitting panel 102, sound generated by vibration of the sound-emitting panel 102 is multi-modal over the entire surface of the sound-emitting panel 102, so that the sound-emitting panel 102 can vibrate together at multiple positions on the whole surface, and thus the front surface of the sound-emitting panel 102 can emit 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.

The frame 200 of the projection screen 000 may be a ring-shaped frame matching the shape of the sound screen 100. The frame 200 has an annular engaging groove 201a, and the frame 200 can be engaged with the edge of the sound screen 100 through the engaging groove 201 a. For example, the sound screen 100 composed of the optical curtain sheet 101 and the sound board 102 in the projection screen 000 may have a rectangular plate shape, and the frame 200 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 200 in the projection screen 000 may be a metal material such as an aluminum alloy or a magnesium alloy. In the present application, each bar-shaped structure has a clamping groove 201a, and each bar-shaped structure can be clamped with a corresponding edge of the sound screen 100, so as to realize the connection between the frame body 200 and the sound screen 100.

Optionally, please refer to fig. 13 and 14, where fig. 13 is a schematic structural diagram of a cover plate provided in an embodiment of the present application, and fig. 14 is a schematic side view of the cover plate shown in fig. 13. The cover plate 300 in the projection screen 000 may further include: a first sheet structure 302. The connecting portion 301 is also sheet-shaped, and the connecting portion 301 is close to the sound screen 100 with respect to the first sheet-like structure 302. In this way, it is ensured that the cover plate 300 can smoothly hold the actuator 400 when the cover plate 300 is connected to the support portion 202 in the frame 200 through the connection portion 301.

In the present application, as shown in fig. 13, the cover plate 300 in the projection screen 000 may further include: two second sheet structures 303 respectively connected to both sides of the first sheet structure 302. The plane of the first sheet-like structure 302 may be perpendicular to the plane of the second sheet-like structure 303. The cover plate 300 also has a through-slot 300a consisting of a first sheet-like structure 302 and two second sheet-like structures 303. The bottom surface D of the through groove 300a in the cover plate 300 may be: the first sheet structure 301 of the cover plate 300 is adjacent to one side of the second sheet structure 302.

In the embodiment of the present application, the length direction of the cover plate 300 may be parallel to the length direction of the through groove 300a in the cover plate 300, and the through groove 300a in the cover plate 300 may be located in the central region in the cover plate 300.

In the present application, the cover plate 300 may be a metal plate bending structure. By way of example, the material of the sheet metal bent structure may include: electrogalvanized steel sheet (also referred to as SECC) or hot-dip galvanized steel sheet (also referred to as SGCC). In the present application, an operator may bend the electrogalvanized steel sheet or the hot-dip galvanized steel sheet to obtain the cover plate 300.

In the related art, as shown in fig. 1 or fig. 2, a cover plate 03 in a projection screen is made of an aluminum alloy material, and the hardness of the cover plate 03 is low. Therefore, when the exciter 04 works, the energy applied to the cover plate 03 by the exciter 04 is very easy to deform the cover plate 03, and the phenomenon of mechanical vibration of the cover plate 03 is aggravated. Further, the energy generated by the exciter 04 is reduced when the energy is transmitted to the sound board 012 of the sound panel 01, and the sound effect of the sound emitted from the projection screen is further reduced.

In the embodiment of the present application, when the cover plate 300 is a metal plate bending structure, the material of the metal plate bending structure includes: the cover plate 300 has a high hardness when galvanized or hot-dip galvanized steel sheets are plated. Therefore, the cover plate 300 can better hold the exciter 400, and when the exciter 400 works, the exciter 400 applies energy to the cover plate 300 so as not to deform the cover plate 300, thereby further reducing the probability of the cover plate 300 appearing mechanical vibration. Moreover, when the cover plate 300 is not deformed during the operation of the exciter 400, it can be known from the law of conservation of energy that the energy generated by the exciter 400 can be more transferred to the sound board 102 of the sound screen 100, so that the sound effect of the sound generated by the projection screen 000 can be further improved.

Alternatively, as shown in fig. 7, 8 and 13, since the exciter 400 in the projection screen 000 needs to be bonded to the bottom surface D of the through-groove 300a in the cover plate 300, the width of the through-groove 300a in the cover plate 300 is generally greater than that of the exciter 400. Therefore, in order to make the positions of the cover plate 300 and the plurality of actuators 400 in the sound screen 100 present a uniform distribution, a strip-shaped convex hull 304 may be provided on the side of the first sheet structure 301 of the cover plate 300 away from the second sheet structure 302. The length direction of the convex hull 304 may be parallel to the length direction of the cover plate 300 and the length direction of the through slot 300a in the cover plate 300, and the convex hull 304 may also be located in the central region of the cover plate 300. The convex hull 304 has a strip-shaped receiving cavity communicating with the through groove 300a in the cover plate 300, and the width of the receiver matches the width of the exciter 400.

As such, when the plurality of actuators 400 between the cover plate 300 and the sound screen 100 are bonded to the cover plate 300, the plurality of actuators 400 may be bonded into the receiving cavities in the convex hull 304. Since the width of the receptacle matches the width of the exciter 400, the positions of the plurality of exciters 400 may assume a uniformly distributed state after the plurality of exciters 400 are bonded to the receptacle. In this case, the plurality of actuators 400 can uniformly apply energy to the sound board 102 in the sound screen 100, thereby further improving the sound effect of the sound generated by the sound screen 100.

In the embodiment of the present application, when the actuator 400 in the projection screen 000 is operated, the actuator 400 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 adhesive layer, when the sound-emitting panel 102 is physically displaced and deformed, the sound-emitting panel 102 applies a force to the optical screen 101. When the optical curtain sheet 101 is acted by the sound-emitting plate 102, the contact part between the optical curtain sheet 101 and the frame 200 is easily damaged.

For this reason, the foam 500 may be provided at a position where the frame 200 contacts the sound emission screen 100, and the probability of damage occurring when the portion of the sound emission screen 100 where the optical curtain sheet 101 contacts the frame 200 is subjected to the force of the sound emission panel 200 may be reduced by the foam 500.

For example, referring to fig. 8, 9 and 15, fig. 15 is a schematic diagram of the connection between the sound screen and the frame in the projection screen shown in fig. 7, and the disposing of the foam 500 at the position where the frame 200 contacts the sound screen 100 may include: an elastic support portion 501 between the side surface of the sound-emitting screen 100 and the groove surface a of the clip groove 201 in the frame 200, a first shock-absorbing layer 502 between the optical curtain sheet 101 in the sound-emitting screen 100 and the groove surface B of the clip groove 201 in the frame 200, and a second shock-absorbing layer 503 between the sound-emitting plate 102 in the sound-emitting screen 100 and the groove surface C of the clip groove 201 in the frame 200. Wherein the elastic support 501 is disconnected from the first and second shock-absorbing

layers

502 and 503.

Due to the elastic support 501 between the side surface of the sound-emitting screen 100 and the frame 200, the first vibration-damping layer 502 between the optical curtain sheet 101 and the frame 200 in the sound-emitting screen 100 and the second vibration-damping layer 503 between the sound-emitting plate 102 and the frame 200 in the sound-emitting screen 100 are disconnected. Therefore, the width of the elastic support portion 501 in the thickness direction of the sound screen 100 can be reduced, and in this case, the width of the elastic support portion 501 in the thickness direction of the sound screen 100 is smaller than the thickness of the sound board 102 in the sound screen 100. Thus, when the projection screen 000 is suspended, the glass fiber skin of the sound board 102 can be prevented from being embedded into the elastic support portion 501, the problem that the edge of the sound board 102 is fixed in the elastic support portion 501 is avoided, and when the sound board vibrates under the driving of the exciter 400, the amplitude of the sound board 102 vibrating at the edge is not limited, so that the sound production effect of the projection screen 000 is improved.

As shown in fig. 15 and 16, fig. 16 is a schematic diagram of a positional relationship between a sound screen and an elastic support portion, a first shock absorbing layer and a second shock absorbing layer according to an embodiment of the present application. The elastic support 501 may be a cylindrical foam, and the elastic support 501 is in contact with the side walls of the frame 200 and the sound screen 100, respectively. In this way, the elastic support portion 501 can roll between the housing 200 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.

In the present application, as shown in fig. 15, the surface of the housing 200 that contacts the elastic support portion 501 has an arc-shaped slide groove 201b, and the elastic support portion 501 is positioned in the slide groove 201 b. In this way, when the sound-emitting panel 102 is vibrated by the driver 400, the elastic support portion 501 can roll in the sliding groove 201b along with the vibration of the sound-emitting panel 102. In this case, the elastic support portion 501 more easily rolls in the housing 200, and the movement space of the sound-emitting panel 102 is further enlarged. Moreover, the elastic support part 501 rolls in the sliding groove 201b, so that the elastic support part 501 is always arranged between the sound production screen 100 and the frame body 200 in the vibration process of the sound production plate 102, hard contact between the sound production screen 100 and the frame body 200 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.

Alternatively, the material of the elastic support 501 may include: silicone rubber or ethylene propylene diene series rubber. The materials of the first and second shock absorbing layers 203 and 204 may include: shock attenuation bubble is cotton.

For example, please refer to fig. 11, 15 and 19, fig. 19 is a side view of another frame provided in the embodiments of the present application. The side of the support portion 202 of the frame 200 close to the sound screen 100 is coplanar with the side of the clamping groove 201a of the clamping portion 201 of the frame 200 contacting the second damping layer 503 of the projection screen 000, that is, the side of the support portion 202 of the frame 200 close to the sound screen 100 is coplanar with the groove surface C of the clamping groove 201a of the clamping portion 201 of the frame 200. Thus, the thickness w of the frame 200 is small.

Optionally, as shown in fig. 11, the projection screen 000 may further include: and a suspension bracket 600 connected to the support portion 202 of the frame body 200. By way of example, the suspension bracket 600 may include: a sheet-shaped hook 601 connected with the frame 200, and a sheet-shaped fixing part 602 connected with the hook 601, wherein the fixing part 602 is used for being fixedly connected with a wall. The hook 601 is parallel to the fixing portion 602.

It is assumed that the distance between the projection surface of the projection screen 000 (i.e., the surface of the sound screen 100 away from the cover plate 300) and the wall in the present application is the same as the distance between the projection surface of the projection screen in the related art and the wall.

Then, as shown in fig. 18 and 19, fig. 18 is a schematic structural view of the suspension bracket in the projection screen shown in fig. 11, and fig. 19 is a schematic structural view of the suspension bracket in the projection screen shown in fig. 3; the distance f between the hook 601 and the fixing portion 602 in the suspension bracket 600 in the present application is greater than the distance g between the hook 05a and the fixing portion 05b in the suspension bracket 05 in the related art.

In this case, in the related art, as shown in fig. 3, the distance c1 between the projection surface of the projection screen and the wall 00 is 38 mm; the thickness d1 of the frame 02 in the projection screen is 31 mm; the distance a1 between the frame 02 and the wall 00 in the projection screen is typically 7.4 mm.

In the present application, as shown in fig. 11, the distance c2 between the projection surface of the projection screen and the wall 00 is 38 mm; the thickness d2 of frame 200 in projection screen 000 is 28 millimeters; the distance a2 between the frame 200 and the wall 00 in a projection screen is typically 15.35 mm.

Therefore, the distance between the frame 200 and the wall 00 is relatively large in the present application, so that the sound generated by the sound generating plate 102 can be better transmitted from the gap between the frame 200 and the wall 00 in the projection screen 000, and the sound generating effect of the projection screen is further improved.

In the embodiment of the present application, as shown in fig. 17, the frame 200 may further include: and reinforcing ribs 203 connected to the clamping portion 201 and the supporting portion 202, respectively. This strengthening rib 203 can improve the intensity of being connected between joint portion 201 and the supporting part 202, when guaranteeing that projection screen 000 fixes on wall 00, the weight of this projection screen 000 can be born in the connection between joint portion 201 and the supporting part, has effectually improved the reliability that projection screen 000 hung on the wall.

In the embodiment of the present application, as shown in fig. 9 or fig. 10, the number of the cover plates 300 in the projection screen 000 is two, and the projection screen further includes: a support beam 700 between the two cover plates 300. The length direction of the cover plate 300 is the same as that of the support beam 700. Both ends of the support beam 700 may be connected to the frame 200 of the projection screen 000. For example, two ends of the supporting beam 700 may be locked on two opposite strip structures in the frame 200 by screws, and the two ends of the supporting beam 700 have a gap of about 3 mm with the support of the sound-emitting plate 102. The support beam 700 can support the sound screen 100 in the projection screen 000, prevent the center of the sound screen 100 from collapsing, and improve the stability of the projection screen 000.

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

For example, when the exciter 400 is bonded to the bottom surface D of the through groove 300a in the cover plate 300 through the vibration-damping adhesive layer, hard contact between the exciter 400 and the cover plate 300 may be prevented, and an acting force applied to the cover plate 300 by the exciter 400 during operation may be reduced, thereby reducing a probability of a mechanical vibration phenomenon occurring in the cover plate 300 during operation of the exciter 400, and also reducing a volume of noise generated when the cover plate 300 generates the mechanical vibration phenomenon, thereby improving an acoustic 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 400 through double faced adhesive tape, and the shock absorption foam is bonded with the cover plate 300 through double faced adhesive tape. A gap exists between the exciter 400 and the cover plate 300, 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 400.

In the present application, the plurality of actuators 400 between the cover 300 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 400 and the sound screen 100 may include: and adhesives such as foam adhesive, glue, adhesive film or double-sided adhesive.

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. 20, fig. 20 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:

a sound screen;

2. The projection screen of claim 1,

the cover plate includes: and the first sheet structure is connected with the exciter, the connecting part is sheet-shaped, and the connecting part is close to the sound generating screen relative to the first sheet structure.

3. The projection screen of claim 2,

the cover plate further includes: the cover plate is provided with two second sheet structures which are respectively connected with two sides of the first sheet structure, the cover plate is also provided with a through groove which is formed by the first sheet structure and the two second sheet structures, and the exciter is positioned in the through groove.

4. The projection screen of claim 3,

the cover plate is of a metal plate bending structure.

5. The projection screen of any one of claims 1 to 4,

the sound screen includes: optical curtain sheets and sound-producing boards which are arranged in a stacked manner;

the projection screen further includes: be located the side of sound production screen with elastic support portion between the joint groove is located the optics curtain piece with first buffer layer between the joint groove, and be located the sound production board with second buffer layer between the joint groove, elastic support portion with first buffer layer with the disconnection of second buffer layer.

6. The projection screen of claim 5,

the elastic supporting part is cylindrical foam,

one surface of the frame body, which is in contact with the elastic supporting part, is provided with an arc-shaped sliding groove, and the elastic supporting part is positioned in the sliding groove.

7. The projection screen of claim 5,

the supporting part is close to the one side of sound screen, with in the joint groove with the one side coplane of second shock-absorbing layer contact.

8. The projection screen of any one of claims 1 to 4,

the frame body further includes: and the reinforcing ribs are respectively connected with the clamping part and the supporting part.

9. The projection screen of any one of claims 1-4, wherein the projection screen further comprises: and the suspension bracket is connected with the supporting part in the frame body.

10. A laser projection system, comprising: a laser projection device, and the projection screen of any of claims 1 to 9, the laser projection device being electrically connected to an actuator in the projection screen.