CN213338300U - Projection screen and laser projection system - Google Patents

Abstract

The application discloses projection screen and laser projection system belongs to laser projection technical field. The projection screen includes: the device comprises a sound production screen, a frame body, a cover plate, a supporting beam, a deformation adjusting assembly and an exciter. The deformation adjusting assembly is located between the supporting beam and the sound production screen and is connected with the sound production screen and the supporting beam respectively. When the sounding board deforms, and the picture borne on the projection screen deforms, the distance between the sounding screen and the supporting beam can be adjusted through the deformation adjusting assembly, so that the shape of the sounding board is corrected, the flatness of one surface of the sounding screen, which is far away from the deformation adjusting assembly, is higher, the probability of deformation of the picture projected on the projection screen by the laser projection equipment is reduced, and the display effect of the picture borne on the projection screen is improved. In addition, the display effect of the picture carried on the projection screen can be improved without adopting a correction algorithm by the laser projection equipment, and the cost for correcting the picture carried on the projection screen is effectively reduced.

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.

The sounding board 012 in the sounding screen 01 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. In the process of manufacturing the sounding board 012, the sounding board 012 needs to be subjected to high-temperature vacuum pressure maintaining operation to ensure that the glass fiber skin and the aluminum honeycomb core layer can be sufficiently bonded through the adhesive film. However, if the sound-emitting panel 012 is not lowered to the predetermined temperature within the predetermined time period after the high-temperature vacuum pressure maintaining operation is performed, the sound-emitting panel 012 is deformed, and the flatness of the surface where the sound-emitting panel 012 and the optical curtain sheet 011 are bonded is low. Therefore, the image projected on the projection screen by the laser projection equipment is deformed, and the display effect of the image carried on the projection screen is poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a display effect of a picture borne on a projection screen. The problem of the display effect of the picture carried on the projection screen in the prior art can be solved, the technical scheme is as follows:

in one aspect, a projection screen is provided, the projection screen comprising:

a sound screen;

a frame connected to at least a portion of an edge of the sound screen;

the frame comprises a strip-shaped cover plate and a strip-shaped supporting beam, wherein two ends of the cover plate and two ends of the supporting beam are connected with the frame body;

a deformation adjustment assembly located between the support beam and the sound production screen, the deformation adjustment assembly respectively with the sound production screen with the support beam is connected, the deformation adjustment assembly is configured to: adjusting the distance between the sound-emitting screen and the supporting beam;

and 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.

In another aspect, there is provided a laser projection apparatus including: the laser projection device is 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 device comprises a sound production screen, a frame body, a cover plate, a supporting beam, a deformation adjusting assembly and an exciter. The deformation adjusting assembly is located between the supporting beam and the sound production screen and is connected with the sound production screen and the supporting beam respectively. When the sounding board deforms, and the picture borne on the projection screen deforms, the distance between the sounding screen and the supporting beam can be adjusted through the deformation adjusting assembly, so that the shape of the sounding board is corrected, the flatness of one surface, away from the deformation adjusting assembly, of the sounding screen is higher, the probability of deformation of the picture projected on the projection screen by the laser projection equipment is reduced, and the display effect of the picture borne on the projection screen is improved. In addition, the display effect of the picture carried on the projection screen can be improved without adopting a correction algorithm by the laser projection equipment, and the cost for correcting the picture carried on the projection screen is effectively reduced.

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 projection screen according to an embodiment of the present disclosure;

FIG. 4 is an exploded view of the projection screen shown in FIG. 3;

FIG. 5 is a schematic diagram of another projection screen according to an embodiment of the present disclosure;

FIG. 6 is an exploded view of the projection screen shown in FIG. 5;

fig. 7 is an effect diagram of a sound board provided by an embodiment of the present application in a multi-mode;

FIG. 8 is a schematic structural diagram of a gasket according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a support beam according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of an adjusting member provided in an embodiment of the present application;

FIG. 11 is a cross-sectional schematic view of the support beam shown in FIG. 9;

FIG. 12 is a schematic structural diagram of a foam provided in the embodiments of the present application;

fig. 13 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. 3 and 4, fig. 3 is a schematic structural diagram of a projection screen according to an embodiment of the present application, and fig. 4 is an exploded view of the projection screen shown in fig. 3. The projection screen 000 may include:

the sound-emitting screen 100, the frame 200, the cover plate 300, the support beam 400, the deformation adjusting assembly 500, and the exciter 600.

The sound screen 100 may include: optical curtain sheets and sound boards. The surface of the optical curtain sheet far away from the sound-emitting plate is generally the projection surface of the projection screen. The laser projection device may project a picture onto a projection surface of the projection screen.

The frame 200 may be attached to at least a portion of the edge of the sound screen 100.

The cover plate 300 and the support beam 400 are both strip-shaped, and both ends of the cover plate 300 are connected to the frame 200, and both ends of the support beam 400 are also connected to the frame 200. Both the cover plate 300 and the support beam 400 are connected to the side of the frame 200 away from the projection surface of the projection screen.

This deformation adjustment assembly 500 is located between supporting beam 400 and vocal screen 100, and this deformation adjustment assembly 500 is connected with vocal screen 100 and supporting beam 400 respectively, and this deformation adjustment assembly 500 is configured as: the distance between the sound-emitting screen 100 and the support beam 400 is adjusted.

The exciter 600 is located between the cover plate 300 and the sound screen 100, and the exciter 600 is connected to the sound screen 100 and the cover plate 300, respectively, and the exciter 600 is used for driving the sound screen 100 to vibrate to make sound.

Among them, the sound board 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. In the process of manufacturing the sound board, the sound board needs to be subjected to high-temperature vacuum pressure maintaining operation so as to ensure that the glass fiber skin and the aluminum honeycomb core layer can be fully bonded through the adhesive film. However, if the sound-emitting panel is not lowered to a predetermined temperature within a predetermined time after the high-temperature vacuum pressure maintaining operation is performed, the sound-emitting panel is deformed, and the flatness of the surface where the sound-emitting panel is bonded to the optical screen sheet is low. Therefore, the image projected on the projection screen by the laser projection equipment is deformed, and the display effect of the image carried on the projection screen is poor.

In the related art, if the picture carried on the projection screen is distorted, the laser projection apparatus usually needs to perform a geometric correction on the picture carried on the projection screen by using a correction algorithm. However, the cost of the correction method is high, and the correction algorithm compensates for the distortion of the picture by adjusting the pixel points in the picture carried on the projection screen, and when the laser projection device projects the picture with dense pixel points such as characters on the projection screen, the picture carried on the projection screen is locally distorted.

In the embodiment of the present application, a deformation adjusting assembly 500 is disposed between the sound screen 100 and the support beam 400, the deformation adjusting assembly 500 is connected to the sound screen 100 and the support beam 400, and the deformation adjusting assembly 500 can adjust the distance between the sound screen 100 and the support beam 400. So, the sounding board in the sounding screen 100 appears warping, when the picture that leads to bearing on the projection screen warp, can adjust the distance between sounding screen 100 and supporting beam 400 through deformation adjusting part 500, correct the shape to this sounding board, the roughness that makes this sounding screen 100 keep away from the one side (also being projection screen's plane of projection) of deformation adjusting part 500 is higher, the probability that the picture that laser projection equipment throws on the projection screen appears warping has been reduced, thereby the display effect of the picture that bears on this projection screen has been improved. In addition, the display effect of the picture carried on the projection screen can be improved without adopting a correction algorithm by the laser projection equipment, and the cost for correcting the picture carried on the projection screen is effectively reduced.

To sum up, the projection screen provided by the embodiment of the present application includes: the device comprises a sound production screen, a frame body, a cover plate, a supporting beam, a deformation adjusting assembly and an exciter. The deformation adjusting assembly is located between the supporting beam and the sound production screen and is connected with the sound production screen and the supporting beam respectively. When the sounding board deforms, and the picture borne on the projection screen deforms, the distance between the sounding screen and the supporting beam can be adjusted through the deformation adjusting assembly, so that the shape of the sounding board is corrected, the flatness of one surface, away from the deformation adjusting assembly, of the sounding screen is higher, the probability of deformation of the picture projected on the projection screen by the laser projection equipment is reduced, and the display effect of the picture borne on the projection screen is improved. In addition, the display effect of the picture carried on the projection screen can be improved without adopting a correction algorithm by the laser projection equipment, and the cost for correcting the picture carried on the projection screen is effectively reduced.

In the embodiment of the present application, please refer to fig. 5 and fig. 6, fig. 5 is a schematic structural diagram of another projection screen provided in the embodiment of the present application, and fig. 6 is an exploded view of the projection screen shown in fig. 5. 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 600 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 600 may vibrate the sound board 102 in the sound screen 100 to generate sound, thereby allowing the projection screen 000 to generate sound.

Illustratively, actuator 600 in projection screen 000 may be electrically connected to a laser projection device that, in operation, sends an acoustic electrical signal to actuator 600. After receiving the sound electrical signal, the exciter 600 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 600 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. 7, fig. 7 is an effect diagram of a multi-modal sound-emitting panel according to an embodiment of the present invention, when the exciter 600 is operated, 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 at multiple positions in a surface manner, 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 clamping groove, and the frame 200 can be clamped with the edge of the sound screen 100 through the clamping groove. 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 structure has a clamping groove, and each bar structure can be clamped with a corresponding edge of the sound screen 100 to realize the connection between the frame body 200 and the sound screen 100.

In the embodiment of the present application, when the actuator 600 in the projection screen 000 is operated, the actuator 600 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, a shock absorbing structure (not shown in fig. 6) may be provided at a position where the frame 200 contacts the sound emission screen 100, by which the probability of damage occurring when the portion of the sound emission screen 100 where the optical screen sheet 101 contacts the frame 200 is subjected to the force of the sound emission plate 200 may be reduced. For example, the material of the shock absorbing structure may be shock absorbing foam or shock absorbing rubber.

In the embodiment of the present application, as shown in fig. 5 or fig. 6, the number of the cover plates 300 in the projection screen 000 is two, and the support beam 400 is located between the two cover plates 300. The longitudinal direction of the cover plate 300 is the same as that of the support beam 400. Both ends of the supporting beam 400 may be connected to the frame 200 of the projection screen 000. For example, two ends of the supporting beam 400 may be locked on two opposite strip structures in the frame 200 by screws, and the two ends of the supporting beam 400 have a gap of about 3 mm from the support of the sound-emitting plate 102. The support beam 400 can support the sound screen 100 of 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, each of the plurality of exciters 600 between the cover plate 300 and the sound screen 100 in the projection screen 000 may be bonded to the cover plate 300 through a shock-absorbing adhesive layer, so as to achieve a tight connection between the exciters 600 and the cover plate 300 in the projection screen 000.

For example, when the exciter 600 and the cover plate 300 are bonded by the vibration-damping adhesive layer, hard contact between the exciter 600 and the cover plate 300 may be prevented, and an acting force applied to the cover plate 300 by the exciter 600 during operation may be reduced, thereby reducing a probability of an engine vibration phenomenon occurring during operation of the cover plate 300 in the exciter 600, and may reduce a volume of noise generated when the cover plate 300 generates 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 600 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 600 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 600.

In the present application, the plurality of actuators 600 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 600 and the sound screen 100 may include: and adhesives such as foam adhesive, glue, adhesive film or double-sided adhesive.

Alternatively, as shown in fig. 6, the deformation adjusting assembly 500 may include: a shim 501 and an adjuster 502. The pad 501 may be connected to a side of the sound screen 100 adjacent to the support beam 400, and for example, the pad 501 may be connected to the sound board 102 of the sound screen 100. The adjusting member 502 is connected to the spacer 501 and the support beam 400, respectively. The adjuster 502 is configured to: the distance between spacer 501 and support beam 400 is adjusted.

Illustratively, the adjusting member 502 can move the pad 501 in a direction perpendicular to a side of the sound screen 100 adjacent to the support beam 400. Because this gasket 501 is connected with the one side that sound-emitting screen 100 is close to supporting beam 400, therefore, when adjusting piece 502 drives gasket 501 and moves in the direction that perpendicular to sound-emitting screen 100 is close to the one side of supporting beam 400, this adjusting piece 502 can adjust the distance between supporting beam 400 and sound-emitting screen 100.

In the embodiment of the present application, please refer to fig. 8, and fig. 8 is a schematic structural diagram of a gasket according to the embodiment of the present application. The spacer 501 has a screw hole 501a on a side remote from the sound-emitting screen 100. By way of example, the material of the shim 501 may be: aluminum alloy or cold-rolled carbon steel sheet with a thickness of 1.5-2 mm.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a support beam according to an embodiment of the present application. Support beam 400 has first through hole 401 connected to screw hole 501 a.

Referring to fig. 10, fig. 10 is a schematic structural diagram of an adjusting member according to an embodiment of the present application. The first end of the adjusting member 502 has a supporting piece 502a engaged with the supporting beam 400, and the second end of the adjusting member 502 is threaded through the first through hole 401 of the supporting beam 400 and the threaded hole 501a of the spacer 501. In this case, the adjusting member 502 is a screw, which may be, for example, a countersunk head screw, a round head screw, or a hexagonal head screw.

In this application, adjusting member 502 can be connected to support beam 400 by a first end and can be connected to spacer 501 by a second end, and thus, the connection between adjusting member 502 and support beam 400 and the connection between adjusting member 502 and spacer 501 can be realized. After the adjusting member 502 is screwed to the pad 501, the adjusting member 502 is screwed in and out to move the pad 502, so as to adjust the distance between the pad 501 and the support beam 400.

In projection screen 000, there are a plurality of spacers 501 between sound generation screen 100 and support beam 400. Each shim 501 may be connected to support beam 400 by a plurality of adjustment members 502. Thus, the deformation generated at a plurality of positions in the sound screen 100 can be corrected by the plurality of spacers 501, and the accuracy of correcting the deformation of the sound screen 100 is improved.

It should be noted that the arrangement direction of the plurality of spacers 501 may be the same as the length direction of the support beam 400. And the smaller the distance between any two spacers 501 is, the more the number of spacers 501 between the sound screen 100 and the support beam 400 is, so that the progress of correcting the deformation of the sound screen can be further improved. For example, the distance between any two spacers 501 may be 0-10 mm.

Alternatively, referring to fig. 11, fig. 11 is a schematic cross-sectional view of the support beam shown in fig. 9. The support beam 400 has a hollow structure. For example, the cross-section of the support beam 400 may be square. The first through hole 401 in the support beam 400 includes: a first sub-through hole 401a on a side of the support beam 400 close to the pad 501, and a second sub-through hole 401b on a side of the support beam 400 away from the pad 501. The first sub through hole 401a may communicate with the second sub through hole 401b, and the size of the second sub through hole 401b is larger than the diameter of the first sub through hole 401 a.

For example, if the first sub-through hole 401a and the second sub-through hole 401b in the support beam 400 are both circular holes, the diameter of the second sub-through hole 401b is larger than that of the first sub-through hole 401 a. For example, the diameter of the first sub through hole 401a may be 3 mm, and the diameter of the second sub through hole 401b may be 8 mm.

In the embodiment of the present application, the first sub through hole 401a in the support beam 400 is used to engage with the support plate 502 in the adjusting member 502. The size of the first sub through hole 401a is smaller than the size of the supporting piece 502a in the adjusting piece 502.

Second sub-through hole 401b in support beam 400 is located on the side of support beam 400 away from pad 501, and communicates with the outside. When the second sub-through hole 401b is large in size, a tool such as a screwdriver or a screwdriver can be inserted through the second sub-through hole 401b to adjust the screwing-in and screwing-out of the adjusting member 502, so as to adjust the distance between the spacer 501 and the support beam 400. The size of the second sub-through hole 401b is larger than the size of the extending end of a tool such as a screwdriver or a screwdriver.

Optionally, as shown in fig. 6, the deformation adjusting assembly 500 further includes: foam 503 between spacer 500 and support beam 400. The foam 503 may match the shape of the pad 501, i.e. the foam 503 coincides with the orthographic projection of the pad 501 on the sound screen 100. Please refer to fig. 12, fig. 12 is a schematic structural diagram of a foam according to an embodiment of the present application. The foam 503 has a second through hole 503a, one end of the second through hole 503a may communicate with the screw hole 501a of the spacer 501, and the other end of the second through hole 503a may communicate with the first through hole 401 of the support beam 400. In the present application, the foam 503 can reduce the probability of noise caused by collision between the pad 501 and the support beam 400 under the vibration of the sound board 102 in the sound screen 100, and improve the sound effect of the sound emitted by the projection screen 000. It should be noted that a foam 503 is required to be disposed between each pad 501 and the support beam 400 in the deformation adjusting assembly 500.

For example, the foam 503 may be: the hardness of the foam is 30-50 degrees.

In the present embodiment, the foam 503 of the strain adjustment assembly 500 may be connected to at least one of the spacer 501 and the support beam 400. In this way, it is ensured that the foam 503 does not fall off during the vibration of the sound board 102 in the sound screen 100.

For example, the foam 503 may be fixedly connected to the side of the pad 501 away from the sound-emitting screen 100 by bonding. For example, the adhesive layer between the foam 503 and the pad 501 may include: and adhesives such as foam adhesive, glue, adhesive film or double-sided adhesive.

In the present application, the spacer 501 of the shape adjusting assembly 500 may be fixedly connected to the side of the sound screen 100 close to the support beam 400 by means of adhesion, that is, the spacer 501 may be fixedly connected to the sound board 102 of the sound screen 100 by means of adhesion. For example, the adhesive layer between the pad 501 and the sound-emitting panel 102 may include: glue, glue film or double-sided adhesive and other adhesives.

In the related art, referring to fig. 1 or fig. 2, when the projection screen needs to generate sound, the multiple actuators 04 in the projection screen need to work simultaneously, and the multiple actuators 04 will simultaneously drive the sound generating board 012 to generate physical displacement and deformation, which results in poor stereo effect of the sound generated by the projection screen.

For example, assume that the plurality of actuators 04 in the projection screen may include: an actuator 04a and an actuator 04 b. In the area where the sound board 012 is located, an area connected to the exciter 04a is a first area 012a, and an area connected to the exciter 04b is a second area 012 b. When the projection screen needs to generate sound, the exciter 04a and the exciter 04b need to work simultaneously, the first area 012a generates physical displacement and deformation, and the second area 012b generates physical displacement and deformation, which interfere with each other, and finally results in poor stereo effect of the sound generated by the projection screen.

In the present application, referring to fig. 5 or fig. 6, the arrangement direction of the plurality of spacers 501 is the same as the length direction of the support beam 400, and when the spacers 501 are fixedly connected to the sound-emitting plate 102 by adhesion, the spacers 501 may divide the sound-emitting plate 102 into the first sound-emitting area 102a and the second sound-emitting area 102 b. Since spacer 501 is connected to support beam 400 by adjusting member 502, no physical displacement or deformation occurs in the area of sound-emitting panel 102 to which spacer 501 is bonded. Therefore, the probability of mutual interference of physical displacement and deformation generated by the first sound-emitting area 102a and the second sound-emitting area 102b can be reduced, so that the probability of mutual interference between sounds emitted by the first sound-emitting area 102a and the second sound-emitting area 102b is reduced, and the stereo effect of the sounds emitted by the projection screen is effectively improved.

In the related art, since the edge of the sound screen is engaged with the frame body through the engaging groove in the frame body, the deformation of the sound board in the sound screen can be corrected by the frame body at the edge of the sound screen. In the manufacturing process of the sound-emitting plate, the central area of the sound-emitting plate is easy to deform, and a gap exists between the sound-emitting plate and a supporting beam positioned in the central area in the projection screen, so that the supporting beam cannot correct the deformed sound-emitting plate.

In the present embodiment, a deformation adjusting assembly 500 is provided between the support beam 400 and the sound screen 100, and the deformation adjusting assembly 500 can correct the deformation of the center area of the sound board 102 in the sound screen 100.

As an example, the sound board 102 in the sound screen 100 has two states of no deformation and deformation.

When the sound board 102 is not deformed, the foam 503 in the deformation adjusting assembly 500 may fill the gap between the support beam 400 and the sound screen 100.

When the sound-emitting panel 102 is deformed, the deformation of the sound-emitting panel 102 can be classified into: the projection surface of the projection screen 000 is convex and concave.

In the first case, the projection surface of the projection screen 000 is convex, the distance between the sound screen 100 and the support beam 400 is increased, and the foam 503 cannot fill the distance between the support beam 400 and the sound screen 100. In this case, it is necessary to insert a tool such as a screwdriver or a screwdriver through the second sub-through hole 401b of the support beam 400 to adjust the amount of the screw-out of the adjusting member 502 of the deformation adjusting assembly 500, so that the spacer 501 of the deformation adjusting assembly 500 moves in a direction approaching the support beam 400, and the distance between the sound-emitting screen 100 and the support beam 400 is reduced. After the foam 503 fills the distance between the support beam 400 and the sound screen 100, the screw-out amount of the adjusting member 502 in the deformation adjusting assembly 500 is stopped.

In the second case, the projection plane of the projection screen 000 is concave, and the distance between the sound screen 100 and the support beam 400 is reduced. In this case, the adjusting member 502 of the deformation adjusting assembly 500 is in an unfastened state, and a tool such as a screwdriver or a screwdriver is required to be inserted through the second sub-through hole 401b of the support beam 400 to adjust the screwing amount of the adjusting member 502 of the deformation adjusting assembly 500, so that the pad 501 of the deformation adjusting assembly 500 moves away from the support beam 400, and the distance between the sound-emitting screen 100 and the support beam 400 is increased, and the distance between the support beam 400 and the sound-emitting screen 100 is increased after the foam 503 is filled. After the adjusting member 502 is in the fastened state, the adjustment of the amount of screwing of the adjusting member 502 in the deformation adjusting assembly 500 is stopped.

In general, after the sound screen 100 is connected to the housing 200, the sound board 102 of the sound screen 100 is deformed in the central region of the sound board 102. However, the deformation of the sound-emitting panel 102 may also occur in the area between the cover panel 300 and the support beam 400. In this case, a new support beam may be added in the region between the cover plate 300 and the support beam 400, and a deformation adjusting assembly between the new support beam and the sound-emitting panel 100, by which deformation in the region between the cover plate 300 and the support beam 400 in the sound-emitting panel 102 can be corrected.

To sum up, the projection screen provided by the embodiment of the present application includes: the device comprises a sound production screen, a frame body, a cover plate, a supporting beam, a deformation adjusting assembly and an exciter. The deformation adjusting assembly is located between the supporting beam and the sound production screen and is connected with the sound production screen and the supporting beam respectively. When the sounding board deforms, and the picture borne on the projection screen deforms, the distance between the sounding screen and the supporting beam can be adjusted through the deformation adjusting assembly, so that the shape of the sounding board is corrected, the flatness of one surface, away from the deformation adjusting assembly, of the sounding screen is higher, the probability of deformation of the picture projected on the projection screen by the laser projection equipment is reduced, and the display effect of the picture borne on the projection screen is improved. In addition, the display effect of the picture carried on the projection screen can be improved without adopting a correction algorithm by the laser projection equipment, and the cost for correcting the picture carried on the projection screen is effectively reduced.

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. 13, fig. 13 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 (10)

1. A projection screen, comprising:

a sound screen;

a frame connected to at least a portion of an edge of the sound screen;

the frame comprises a strip-shaped cover plate and a strip-shaped supporting beam, wherein two ends of the cover plate and two ends of the supporting beam are connected with the frame body;

a deformation adjustment assembly located between the support beam and the sound production screen, the deformation adjustment assembly respectively with the sound production screen with the support beam is connected, the deformation adjustment assembly is configured to: adjusting the distance between the sound-emitting screen and the supporting beam;

and 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.

2. The projection screen of claim 1,

the deformation adjustment assembly includes: the gasket is connected with the sound production screen, and the adjusting piece is respectively connected with the gasket and the supporting beam;

wherein the adjustment member is configured to: adjusting a distance between the shim and the support beam.

3. The projection screen of claim 2,

one surface of the gasket, which is far away from the sound-emitting screen, is provided with a threaded hole, and the support beam is provided with a first through hole communicated with the threaded hole;

the first end of regulating part have be used for with a backing sheet of supporting beam joint, the second end of regulating part passes first through-hole with screw hole threaded connection.

4. The projection screen of claim 3,

the support beam is a hollow structure, and the first through hole comprises: the support beam is close to the first sub-through hole on one side of the gasket, the support beam is far away from the second sub-through hole on one side of the gasket, the first sub-through hole is communicated with the second sub-through hole, and the size of the second sub-through hole is larger than that of the first sub-through hole.

5. The projection screen of claim 3,

the deformation adjustment assembly further comprises: the foam body is located the gasket with between the supporting beam, the foam body with the shape of gasket matches, just the foam body has the second through-hole, the second through-hole respectively with the screw hole with first through-hole intercommunication.

6. The projection screen of claim 5,

the foam is bonded with the gasket.

7. The projection screen of any one of claims 2 to 6,

the gasket with the sound production screen is close to the one side bonding of a supporting beam.

8. The projection screen of any one of claims 2 to 6,

the number of the gaskets between the sound-emitting screen and the supporting beam is multiple.

9. The projection screen of any one of claims 1 to 6,

the length direction of the cover plate is the same as that of the support beam.

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.

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