CN112383763B - Projection screen and laser projection system - Google Patents
Projection screen and laser projection system Download PDFInfo
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- CN112383763B CN112383763B CN202011255478.0A CN202011255478A CN112383763B CN 112383763 B CN112383763 B CN 112383763B CN 202011255478 A CN202011255478 A CN 202011255478A CN 112383763 B CN112383763 B CN 112383763B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Acoustics & Sound (AREA)
- Optics & Photonics (AREA)
- Multimedia (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The application discloses projection screen and laser projection system belongs to the laser projection field. The projection screen includes: the sound production screen, framework, elastic support portion, first buffer layer, second buffer layer and exciter. The frame body is clamped at the edge of the sounding screen, is positioned on an elastic supporting part between the side wall of the sounding screen and the frame body, and is disconnected from a first damping layer positioned between the projection surface of the sounding screen and the frame body and a second damping layer positioned between one surface far away from the projection surface of the sounding screen and the frame body. So, when this projection screen hangs, can avoid in the glass fiber covering embedding elastic support portion in the acoustic board, when the acoustic board vibrates under the drive of exciter, the amplitude that the acoustic board vibrated in the edge can not receive the restriction, and then has improved this projection screen's sound production effect.
Description
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 sounding board 012, and a curtain sheet adhesive layer (not shown) between the optical curtain sheet 011 and the sounding 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 can be strip-shaped, and both ends of the cover plate 03 are connected with 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 joint between a sound-generating screen and a frame body provided in the related art, and fig. 4 is a schematic diagram of a positional relationship between the sound-generating screen and foam shown in fig. 3, and the foam 05 can be wrapped around an edge of the sound-generating screen 01, so that the frame body 02 is clamped with an edge of the sound-generating screen 01 through the foam 05, and the foam 05 can prevent a hard contact between the sound-generating screen 01 and the frame body 02.
As shown in fig. 5, fig. 5 is a schematic diagram of a positional relationship between a sound board and foam provided in the related art. The sound-emitting panel 012 in the sound-emitting screen 01 may include: a plate-shaped aluminum honeycomb core layer 012a, and a glass fiber skin 012b on both sides of the aluminum honeycomb core layer. Because this glass fiber skin 012b hardness is higher, aluminium honeycomb layer 012a hardness is lower, consequently, when this projection screen hangs, under the effect of gravity, glass fiber skin 012b can imbed in the bubble cotton 05, and bubble cotton 05 can extend to in aluminium honeycomb layer 012a under glass fiber skin 012 b's extrusion. In this case, the edge of the sound-emitting panel 012 is equivalent to being fixed in the foam 05, and when the sound-emitting panel 012 vibrates under the driving of the exciter 04, the foam 05 limits the amplitude of the sound-emitting panel 012 vibrating in the thickness direction at the edge, thereby resulting in a poor sound-emitting effect of the projection screen.
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, the projection screen comprising:
the sounding screen is provided with a projection surface;
a frame body clamped at the edge of the sound-emitting screen,
the elastic supporting part is positioned between the frame body and the sounding screen, the first damping layer is positioned between the frame body and the projection surface of the sounding screen, the second damping layer is positioned between the frame body and the surface of the sounding screen, which is far away from the projection surface, and the elastic supporting part is disconnected from the first damping layer and the second damping layer;
and the exciter is connected with one surface of the sound production screen, which is far away from the projection surface, and drives the sound production screen to vibrate to produce sound.
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 may include: the sound production screen, framework, elastic support portion, first buffer layer, second buffer layer and exciter. The frame body is clamped at the edge of the sounding screen, the elastic supporting part is positioned between the side wall of the sounding screen and the frame body, and the elastic supporting part is disconnected from the first damping layer positioned between the projection surface of the sounding screen and the frame body and the second damping layer positioned between the surface far away from the projection surface of the sounding screen and the frame body. So, compare with the scheme at the edge of sound screen of the cotton parcel of bubble that the correlation technique provided, the scheme that this application provided hangs at projection screen, can reduce the probability in the glass fiber skin embedding elastic support portion of the sound board in the sound screen, the effectual edge of having avoided appearing the sound board is fixed the problem in elastic support portion, when the sound board vibrates under the drive of exciter, the sound board can not receive the restriction at the edge in the amplitude that its thickness direction goes on vibrating, 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 schematic structural diagram of a joint between a sound screen and a frame body provided in the related art;
FIG. 4 is a schematic diagram 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-emitting panel 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 the connection between the sound screen and the housing of the projection screen of FIG. 6;
FIG. 9 is a schematic diagram of another projection screen according to an embodiment of the present application;
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. 12 is a sectional view of a 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 sound screen shown in FIG. 9 in positional relationship with the resilient support, the first shock absorbing layer and the second shock absorbing 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. 19 is a schematic view of another embodiment of the present application showing the position of the elastic support in the sliding groove;
FIG. 20 is a schematic view of a position of another elastic support in the sliding groove according to an embodiment of the present disclosure;
FIG. 21 is a schematic view of another attachment of a housing and sound screen provided by an embodiment of the present application;
FIG. 22 is a schematic diagram of the construction of the cover plate in the projection screen shown in FIG. 9;
fig. 23 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:
the sound-emitting screen 100, the frame 201, the elastic support 202, the first damper layer 203, the second damper layer 204, and the actuator 300.
The sound screen 100 may include: optical curtain sheets and sound boards. The sound screen 100 has a projection surface, and the laser projection device can project a picture onto the projection surface of the sound screen 100. The projection surface of the sound-emitting screen 100 is generally the surface on which the optical curtain is located.
The elastic support 202, the first shock absorbing layer 203 and the second shock absorbing layer 204 are all located between the frame 201 and the sound screen 100. In order to more clearly see the position relationship between the frame 201, the elastic support 202, the first shock absorbing layer 203, the second shock absorbing layer 204 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 in the projection screen in fig. 6. Frame 201 centre gripping is at the edge of sound production screen 100, and elastic support portion 202 is located between the side of sound production screen 100 and frame 201, and first buffer layer 203 is located between the plane of projection of frame 201 and sound production screen 100, and second buffer layer 203 is located between the one side of the plane of projection that sound production screen 100 was kept away from to frame 201 and sound production screen 100, and elastic support portion 202 and first buffer layer 203 and 204 second buffer layer break off.
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 disconnected from both the first vibration damping layer 203 located between the projection surface of the sound-emitting panel 100 and the frame 201 and the second vibration damping layer 204 located between the surface of the sound-emitting panel 100 away from the projection surface and the frame 201. Therefore, compare with the scheme of the cotton parcel of bubble that the correlation technique provided at the edge of sound production screen, the scheme that this application provided can reduce the probability in the glass fiber skin embedding elastic support portion 202 among the sound production board when this projection screen 000 hangs, the effectual edge of having avoided appearing the sound production board is fixed the problem in elastic support portion 202, when the sound production board vibrates under the drive of exciter 300, the amplitude that the sound production board vibrates in its thickness direction at the edge can not receive the restriction, and then has improved the vocal effect of this projection screen 000.
To sum up, the projection screen provided by the embodiment of the present application includes: the sound production screen, framework, elastic support portion, first buffer layer, second buffer layer and exciter. The frame body is clamped at the edge of the sounding screen, is positioned on an elastic supporting part between the side wall of the sounding screen and the frame body, and is disconnected from a first damping layer positioned between the projection surface of the sounding screen and the frame body and a second damping layer positioned between one surface far away from the projection surface of the sounding screen and the frame body. So, compare with the scheme at the edge of sound screen of the cotton parcel of bubble that the correlation technique provided, the scheme that this application provided hangs at projection screen, can reduce the probability in the glass fiber skin embedding elastic support portion of the sound board in the sound screen, the effectual edge of having avoided appearing the sound board is fixed the problem in elastic support portion, when the sound board vibrates under the drive of exciter, the sound board can not receive the restriction at the edge in the amplitude that its thickness direction goes on vibrating, and then improved this projection screen's vocal effect.
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-generating panel in a multi-mode according to an embodiment of the present invention, when the exciter 300 is operated, because an aluminum honeycomb core layer is present in the sound-generating panel 102, sound generated by vibration of the sound-generating panel 102 is in a multi-mode over the entire surface of the sound-generating panel 102, so that the sound-generating panel 102 can vibrate at a plurality of positions in a face-to-face manner, and thus the front surface of the sound-generating panel 102 can generate sound. The sound board 102 may have a thickness ranging from 2 mm to 10 mm. For example, the sound-emitting panel 102 may have a thickness of 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. 12, and fig. 12 is a cross-sectional view of a 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, the contact part of the optical curtain sheet 101 and the frame 201 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 damper layer 203 and a second damper layer 204 are provided between the sound screen 100 and the frame 201. The elastic support 202, the first damper layer 203, and the second damper layer 204 prevent hard contact between the sound screen 100 and the frame 201.
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 one-to-one to four edges of the sound screen 100. 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 shock absorbing layer 203, and the second shock absorbing layer 204, please refer to fig. 13 and 14, and fig. 14 is a schematic view of the positional relationship between the sound screen and the elastic support portion, the first shock absorbing layer, and the second shock absorbing layer shown in fig. 9. The elastic support portion 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 shock-absorbing 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 shock-absorbing layer 204 is located between the surface of the sound-emitting screen 100 away from the projection surface and the groove surface C of the clamping groove 201a in the frame 201.
As shown in fig. 13 and 14, the elastic support 202 may be at least one of a cylindrical elastic support and a spherical elastic support, and the elastic support 202 is in contact with the side walls 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 elastic support and/or at least two spherical elastic supports.
For example, in a possible implementation manner, as shown in fig. 15, fig. 15 is a partial enlarged view of the connection between the sound screen and the frame body provided in the embodiment of the present application, and the elastic support 202 between the frame body 201 and one side surface of the sound screen 100 in the projection screen 000 may include: at least one cylindrical elastic support member 202a, each cylindrical elastic support member 202a may have a length direction identical to that of a side surface with which it is in contact.
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 spherical elastic supports 202b, wherein the arrangement direction of the at least two spherical elastic supports 202b is the same as the length direction of the side surfaces contacted with the spherical elastic supports 202 b.
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: at least one cylindrical elastic support 202a and at least two spherical elastic supports 202b, wherein the length direction of each cylindrical elastic support 202a may be the same as the length direction of the side surface in contact therewith, and the arrangement direction of the at least two spherical elastic supports 202b may be the same as the length direction of the side surface in contact therewith.
In the present application, the surface of the housing 201 that contacts the elastic support portion 202 has an arc-shaped slide groove 201b, and the elastic support portion 202 is positioned 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 can more easily roll in the housing 201, and the movement space of the sound-emitting panel 102 can be 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. 19, fig. 19 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 moves toward the direction close to the projection surface, the elastic support portion 202 rolls in the sliding groove 201a toward the direction close to the projection surface with the movement of the sound emitting plate 102, so that the elastic support portion 202 is located in the sliding groove 201b at the position close to the projection surface.
In the second situation, 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 panel 100 to move away from the projection surface. In this case, as shown in fig. 20, fig. 20 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.
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 embodiment of the present application, 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, the sound screen 100 is located in the central area of the projection screen 000, and the elastic support portion 202 is cylindrical or spherical and can move in the sliding groove 201b along with the vibration of the sound board 102.
The above embodiments are described by taking the elastic support 202 as a cylindrical or spherical elastic support, and in another possible implementation manner, the elastic support 202 may also be a spring.
For example, please refer to fig. 21, fig. 21 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 to the sound screen 100, and the other end is connected to 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.
Alternatively, the materials of the first and second shock absorbing layers 203 and 204 may include: shock absorption foam or shock absorption rubber and the like.
In the embodiment of the present application, the first shock absorbing layer 203 and the second shock absorbing layer 204 are strip-shaped shock absorbing layers. In order to prevent the first and second vibration-damping layers 203 and 204 from falling off from the frame 201 during vibration of the sound-emitting panel 100, the first vibration-damping layer 203 needs to be bonded to at least one of the frame 201 and the sound-emitting panel 100, and the second vibration-damping layer 204 needs to be bonded to at least one of the frame 201 and the sound-emitting panel 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 shock absorbing layer 204 may be bonded to the frame 201 and in contact with the sound screen 100. In this case, since the second damping 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 damping 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 damping layer 204 is bonded on the frame body 201, so that the second damping layer 204 can be completely wrapped by the edge of the frame body 201, the condition that the second damping layer 204 is exposed is avoided, and the attractiveness of the projection screen 000 is improved.
In the present application, when the second vibration damping layer 204 is bonded to 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 201a, the first vibration damping layer 203 may be bonded to the sound screen 100 and may be in contact with the frame 201. So, can avoid all when bonding first buffer layer 203 and second buffer layer 204 with framework 201, when framework 201 passes through the centre gripping of joint groove 201a at the edge of sound production screen 100, sound production screen 100 produces ascending effort to first buffer layer 203 and second buffer layer 204, lead to first buffer layer 203 and second buffer layer 204 to drop from framework 201, the rigid contact between sound production screen 100 and the framework 201, thereby reduce the vibration in-process at sound production board 102, sound production screen 100 takes place the probability of damaging.
Optionally, the first damping layer 203 and the second damping 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 201. 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 201 by screws. Alternatively, shock-absorbing layers may be disposed at positions where both ends of each cover plate 400 and both ends of the support plate 500 contact the frame 201, and the thickness of the shock-absorbing layers may range from 0.5 mm to 0.8 mm. The shock-absorbing layer may be made of materials including: acrylic acid sub-sensitive adhesive tape, similar adhesive tape, silica gel pad or foam, etc. The shock-absorbing layer 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. 22, fig. 22 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 D 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 D 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, so that a probability of a mechanical vibration phenomenon occurring in the cover plate 400 during operation of the exciter 300 may be reduced, and a volume of noise generated when the cover plate 400 generates the mechanical vibration phenomenon may be reduced, 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.
To sum up, the projection screen provided by the embodiment of the present application includes: the sound production screen, framework, elastic support portion, first buffer layer, second buffer layer and exciter. The frame body is clamped at the edge of the sounding screen, is positioned on an elastic supporting part between the side wall of the sounding screen and the frame body, and is disconnected from a first damping layer positioned between the projection surface of the sounding screen and the frame body and a second damping layer positioned between one surface far away from the projection surface of the sounding screen and the frame body. So, compare with the scheme at the edge of sound screen of the cotton parcel of bubble that the correlation technique provided, the scheme that this application provided hangs at projection screen, can reduce the probability in the glass fiber skin embedding elastic support portion of the sound board in the sound screen, the effectual edge of having avoided appearing the sound board is fixed the problem in elastic support portion, when the sound board vibrates under the drive of exciter, the sound board can not receive the restriction at the edge in the amplitude that its thickness direction goes on vibrating, and then improved this 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. 23, fig. 23 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:
the sounding screen is provided with a projection surface, a side surface connected with the projection surface and a back surface opposite to the projection surface, and is in a rectangular plate shape;
a frame clamped at an edge of the sound screen, the frame comprising: the four strip-shaped structures correspond to the four edges of the sound-emitting screen one by one and are sequentially connected end to end;
the elastic support part is positioned between the frame body and the sound-emitting screen, the first damping layer is positioned between the frame body and the projection surface of the sound-emitting screen, the second damping layer is positioned between the frame body and the back surface of the sound-emitting screen, and the elastic support part is disconnected from the first damping layer and the second damping layer;
and the exciter is connected with one surface of the sound production screen, which is far away from the projection surface, and drives the sound production screen to vibrate to produce sound.
2. The projection screen of claim 1,
the elastic support portion includes: at least one of a cylindrical elastic support and a spherical elastic support.
3. The projection screen of claim 2,
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.
4. The projection screen of claim 2,
the sound production screen is rectangular plate-shaped, the framework with the elastic support portion between one side in the sound production screen includes: at least one said cylindrical resilient support and/or at least two said spherical resilient supports;
the length direction of each cylindrical elastic support piece is the same as that of the side face, and the arrangement direction of at least two spherical elastic support pieces is the same as that of the side faces.
5. The projection screen of claim 2,
the diameter range of the elastic supporting part is as follows: 5 mm to 10 mm.
6. The projection screen of any one of claims 1 to 5,
the first damping layer and the second damping portion are strip-shaped damping layers, the first damping layer is bonded with at least one of the frame body and the sound-emitting screen, and the second damping layer is bonded with at least one of the frame body and the sound-emitting screen.
7. The projection screen of claim 6,
the first shock absorption layer is bonded with the sound production screen and is in contact with the frame body; the second shock-absorbing layer is bonded with the frame body and is in contact with the sound production screen.
8. The projection screen of any one of claims 1 to 5,
the framework be with the cyclic annular framework of the shape matching of sound production screen, the framework has annular joint groove, the elastic support portion first buffer layer with the second buffer layer is located the joint inslot, the framework passes through the joint groove and is located the joint inslot the elastic support portion first buffer layer with the second buffer layer centre gripping is in the edge of sound production screen.
9. The projection screen of any one of claims 1 to 5,
the projection screen further includes: the two ends of the cover plate are respectively connected with the frame body, the exciter is located between the sound-emitting screen and the cover plate, and the exciter is connected with the cover plate.
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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| CN202011255478.0A CN112383763B (en) | 2020-11-11 | 2020-11-11 | Projection screen and laser projection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011255478.0A CN112383763B (en) | 2020-11-11 | 2020-11-11 | Projection screen and laser projection system |
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| CN112383763B true CN112383763B (en) | 2022-06-24 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5818950A (en) * | 1994-02-25 | 1998-10-06 | Kabushiki Kaisha Kenwood | Speaker system and its support legs |
| US6389935B1 (en) * | 1996-09-02 | 2002-05-21 | New Transducers Limited | Acoustic display screen |
| CN108462917A (en) * | 2018-03-30 | 2018-08-28 | 四川长虹电器股份有限公司 | Electromagnetic excitation energy converter and laser projection optics sound equipment screen and its synchronous display method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB235529A (en) * | 1924-06-16 | 1926-03-11 | Georg Seibt Fabrik Elek Scher | Improvements in and relating to loud speakers |
| GB611937A (en) * | 1946-05-09 | 1948-11-05 | Radio Gramophone Dev Company L | An improved gramophone pick-up |
| JP3900278B2 (en) * | 2002-12-10 | 2007-04-04 | ソニー株式会社 | Array speaker device with projection screen |
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2020
- 2020-11-11 CN CN202011255478.0A patent/CN112383763B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5818950A (en) * | 1994-02-25 | 1998-10-06 | Kabushiki Kaisha Kenwood | Speaker system and its support legs |
| US6389935B1 (en) * | 1996-09-02 | 2002-05-21 | New Transducers Limited | Acoustic display screen |
| CN108462917A (en) * | 2018-03-30 | 2018-08-28 | 四川长虹电器股份有限公司 | Electromagnetic excitation energy converter and laser projection optics sound equipment screen and its synchronous display method |
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| CN112383763A (en) | 2021-02-19 |
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