CN114095709B - Projection screen and laser projection system - Google Patents
Projection screen and laser projection system Download PDFInfo
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- CN114095709B CN114095709B CN202010857228.8A CN202010857228A CN114095709B CN 114095709 B CN114095709 B CN 114095709B CN 202010857228 A CN202010857228 A CN 202010857228A CN 114095709 B CN114095709 B CN 114095709B
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- screen
- cover plate
- sound
- projection screen
- exciter
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- 238000013016 damping Methods 0.000 claims description 16
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- 239000012790 adhesive layer Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000006096 absorbing agent Substances 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000003287 optical effect Effects 0.000 description 22
- 239000000463 material Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 229920001971 elastomer Polymers 0.000 description 9
- 239000000725 suspension Substances 0.000 description 9
- 239000006260 foam Substances 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000012792 core layer Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 239000011359 shock absorbing material Substances 0.000 description 1
Classifications
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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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- Optics & Photonics (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
The application discloses a projection screen and a laser projection system, and belongs to the technical field of laser projection. A projection screen, comprising: sound emitting screen, framework, apron and exciter. The cover plate is strip-shaped, the first end of the cover plate can be connected with the frame body, the second end of the cover plate is not connected with the frame body, and the exciter is only connected with one of the sound emitting screen and the cover plate, so that the exciter is prevented from being fixed in a limited space formed between the cover plate and the sound emitting screen. Therefore, when the projection screen vibrates in a high-frequency mode in the sounding process, the acting force applied by the exciter to the cover plate is small, the amplitude of the phenomenon of mechanical vibration of the cover plate is effectively reduced, the volume of noise at the connection position of the cover plate and the frame body is further reduced, and the sound effect of sound emitted by the projection screen is improved.
Description
Technical Field
The present application relates to the field of laser projection technology, and 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, and the laser projection device can project pictures on the projection screen so as to realize functions of video playing and the like.
Presently, sound emitting components in laser projection systems may be integrated into the projection screen. For example, referring to fig. 1, fig. 1 is a top view of a projection screen according to the related art, and fig. 2 is an exploded view of the projection screen shown in fig. 1. The projection screen may include: sound emitting screen 01, casing 02, apron 03, exciter 04 and shock attenuation frame 05. The sound emitting screen 01 may include: an optical curtain 011 and a sound generating plate 012, and a curtain adhesive layer 013 therebetween. The shock absorbing frame 05 may surround the sound emitting screen 01 and be connected to an edge of the sound emitting screen 01. The frame 02 may be connected to the damper frame 05. The cover 03 may be strip-shaped, and two ends of the cover 03 are connected to the frame 02. The exciter 04 is located between the sound emitting panel 01 and the cover plate 03, and the exciter 04 is connected to a side of the sound emitting panel 012 of the sound emitting panel 01 away from the optical screen 011. The exciter 04 may vibrate with the sound producing plate 012 in the sound producing screen 01 to produce sound.
Referring to fig. 3, fig. 3 is a partial exploded view of the projection screen shown in fig. 1. The exciter 04 is usually bonded to a surface of the sound emitting plate 012 remote from the optical screen 011 through an adhesive layer 04a, and the exciter 04 is also usually bonded to a surface of the cover plate 03 close to the sound emitting plate 012 through a damper adhesive layer 04 b. When the exciter 04 is operated, it can vibrate at a high frequency to drive the sound emitting plate 012 to generate physical displacement and deformation, and further the sound emitting plate 012 can be made to emit sound.
However, in the projection screen with the sound emitting assembly integrated, since both ends of the cover plate 03 in the projection screen are required to be fixedly connected to the frame 02, the exciter 04 is required to be fixed in a limited space formed between the cover plate 03 and the sound emitting plate 012. Therefore, when the exciter 04 vibrates at a high frequency, the cover 03 receives a relatively large force from the exciter 04, so that the cover 03 is relatively obvious in vibration, and the cover 03 in vibration is prone to collide with the frame 02 at the connection position, so that noise is generated, and the sound effect of the sound generated by the projection screen is poor.
Disclosure of Invention
The embodiment of the application provides a projection screen and a laser projection system. The sound effect of the figure sent by the projection screen is good, and the technical scheme is as follows:
In one aspect, there is provided a projection screen comprising:
A sound emitting screen;
The frame body is connected with the edge of the sound production screen;
the first end of the strip-shaped cover plate is connected with the frame body, and the second end of the cover plate is in a suspended state;
And the exciter is positioned between the cover plate and the sound generating screen, is connected with one of the sound generating screen and the cover plate, and is used for driving the sound generating screen to vibrate so as to generate sound.
In another aspect, an optical projection system is provided, comprising: a laser projection device and a projection screen as described above.
The technical scheme provided by the embodiment of the application has the beneficial effects that:
the projection screen may include: sound emitting screen, framework, apron and exciter. The cover plate is strip-shaped, the first end of the cover plate can be connected with the frame body, the second end of the cover plate is not connected with the frame body, and the exciter is only connected with one of the sound emitting screen and the cover plate, so that the exciter is prevented from being fixed in a limited space formed between the cover plate and the sound emitting screen. Therefore, when the projection screen vibrates in a high-frequency mode in the sounding process, the acting force applied by the exciter to the cover plate is small, the amplitude of the phenomenon of mechanical vibration of the cover plate is effectively reduced, the volume of noise at the connection position of the cover plate and the frame body is further reduced, and the sound effect of sound emitted by the projection screen is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a top view of a projection screen provided by the related art;
FIG. 2 is an exploded view of the projection screen shown in FIG. 1;
FIG. 3 is a partial exploded view of the projection screen shown in FIG. 1;
FIG. 4 is a schematic view of a projection screen according to an embodiment of the present application;
FIG. 5 is an exploded view of the projection screen shown in FIG. 4;
FIG. 6 is a schematic view of another projection screen according to an embodiment of the present application;
FIG. 7 is an exploded view of the projection screen shown in FIG. 6;
FIG. 8 is a diagram showing the effect of a sound board according to an embodiment of the present application in a multi-mode;
FIG. 9 is a schematic diagram of a connection relationship among an exciter, a cover plate and a sound-emitting screen in a projection screen according to an embodiment of the present application;
FIG. 10 is a schematic diagram of a connection relationship among an exciter, a cover plate and a sound board in another projection screen according to an embodiment of the present application;
FIG. 11 is a schematic view of a shock absorbing member according to an embodiment of the present application;
Fig. 12 is a schematic structural diagram of a laser projection system according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a projection screen according to an embodiment of the present application, and fig. 5 is an exploded view of the projection screen shown in fig. 4. The projection screen 000 may include:
Sound emitting screen 100, frame 200, cover 300, and exciter 400.
The frame 200 may be connected to an edge of the sound emitting screen 100. By way of example, the frame 200 may be generally a ring-shaped frame that matches the shape of the sound emitting screen 100, such that the frame 200 may be wrapped around the sound emitting screen 100 and connected to the edges of the sound emitting screen 100. For example, when the sound emitting panel 100 has a rectangular plate-like structure, the housing 200 is a rectangular annular housing.
The cover 300 may be in a strip shape, a first end of the cover 300 may be connected to the frame 200, and a second end of the cover 300 may be in a suspended state. That is, the second end of the cover 300 is not connected to the frame 200. For example, when the sound emitting screen 100 has a rectangular plate-like structure, the length direction of the cover plate 300 may be parallel to the width direction of the sound emitting screen 100. In this case, the length of the cover plate 300 is smaller than the width of the sound emitting screen 100. Thus, the first end of the cover 300 is connected with the frame 200, and the second end of the cover 300 is suspended.
The exciter 400 may be located between the sound emitting screen 100 and the cover plate 300, and the exciter 400 may be connected to one of the sound emitting screen 100 and the cover plate 400. The exciter 400 is used to vibrate the sound emitting screen 100 to emit sound.
In the embodiment of the present application, since the first end of the cover 300 in the projection screen 000 is connected to the frame 200 and the second end of the cover 300 is not connected to the frame 200, and the exciter 400 in the projection screen 000 is connected to only one of the sound emitting screen 100 and the cover 400, the fixing of the exciter 400 in a limited space formed between the cover 300 and the sound emitting screen 100 is avoided. Therefore, when the projection screen 000 vibrates in a high-frequency manner during the sound production process, the exciter 400 applies a small force to the cover plate 300, so that the amplitude of the vibration phenomenon of the cover plate 300 is effectively reduced, and the volume of noise at the connection position of the cover plate 300 and the frame 200 is further reduced.
In summary, the projection screen provided in the embodiment of the present application includes: sound emitting screen, framework, apron and exciter. The cover plate is strip-shaped, the first end of the cover plate can be connected with the frame body, the second end of the cover plate is not connected with the frame body, and the exciter is only connected with one of the sound emitting screen and the cover plate, so that the exciter is prevented from being fixed in a limited space formed between the cover plate and the sound emitting screen. Therefore, when the projection screen vibrates in a high-frequency mode in the sounding process, the acting force applied by the exciter to the cover plate is small, the amplitude of the phenomenon of mechanical vibration of the cover plate is effectively reduced, the volume of noise at the connection position of the cover plate and the frame body is further reduced, and the sound effect of sound emitted by the projection screen is improved.
Alternatively, as shown in fig. 6 and 7, fig. 6 is a schematic structural view of another projection screen provided in the embodiment of the present application, and fig. 7 is an exploded view of the projection screen shown in fig. 6. The sound emitting screen 100 in the projection screen 000 may include: an optical curtain 101 and a sound board 102, and a curtain adhesive layer 103 between the optical curtain 101 and the sound board 102. The optical curtain 101 may be bonded to the sound board 102 by a curtain bonding layer 103. The sound board 102 is positioned close to the cover plate 300 with respect to the optical curtain sheet 101 such that the exciter 400 between the cover plate 300 and the sound screen 100 can contact the sound board 102 in the sound screen 100. The exciter 400 may vibrate the sound board 10 in the sound emitting screen 100 to emit sound, so that the projection screen 000 may emit sound.
For example, the exciter 400 in the projection screen 000 may be electrically connected to a laser projection device that may, in operation, send an audible electrical signal to the exciter 400. After receiving the sound electrical signal, the exciter 400 can perform reciprocating motion based on the sound electrical signal, so that the whole surface of the sound generating plate 102 in the sound generating screen 100 can be driven to vibrate together, so that the sound generating plate 102 generates sound, and the projection screen 000 can generate sound when the laser projection device works.
In the present application, the sound board 102 in the sound screen 100 may include: a plate-shaped aluminum honeycomb core layer and glass fiber skins positioned on two sides of the aluminum honeycomb core layer. The exciter 400 may be in contact with one glass fiber skin of the sound board 102, while the other glass fiber skin needs to be bonded to the optical curtain sheet 101 by the curtain sheet bonding layer 103. As shown in fig. 8, fig. 8 is an effect diagram of a sound board in a multi-mode manner, when the exciter 400 is operated, because an aluminum honeycomb core layer exists in the sound board 102, sound generated by vibration of the sound board 102 is in a multi-mode manner on the whole surface of the sound board 102, so that the sound board 102 can vibrate together in a plurality of positions with the whole surface, and the front surface of the sound board 102 can generate sound. The sound board 102 may have a thickness in the range of 2 mm to 10 mm. For example, the sound board 102 may have a thickness of 5 millimeters.
The optical curtain sheet 101 in the sound emitting screen 100 has a micromirror reflection structure therein, which can reflect light emitted from the laser projection device in a specific direction. Therefore, the light reflected by the micro-mirror reflecting structure can reach the eyes of the user to the greatest extent, and the user can watch a clearer picture. By way of example, the optical sheet 101 may include: circular fresnel optical film, black grid or white plastic screen, etc. The thickness of the optical sheet 101 may range from 0.5mm to 1.7 mm. For example, the thickness of the optical sheet 101 may be 1.0 mm.
The curtain bonding layer in the sound emitting screen 100 may be an adhesive such as a glue film or a double sided tape. The thickness of the curtain bonding layer 104 may range from 0.1 mm to 1 mm. For example, the thickness of the curtain sheet adhesive layer 104 may be 0.5 mm.
The sound emitting screen 100 composed of the optical curtain sheet 101 and the sound emitting panel 102 in the projection screen 000 may have a rectangular plate shape, and the frame 200 in the projection screen 000 may include: four bar structures corresponding to the four edges of the sound emitting screen 100 one by one. The four strip structures are sequentially connected end to form a rectangular frame body matched with the shape of the sound production screen. For example, any two adjacent strip structures may be connected by an L-shaped connector, which may be screwed with the strip structures. 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 emitting screen 100, so as to realize connection between the frame 200 and the sound emitting screen 100.
In the embodiment of the present application, when the exciter 400 in the projection screen 000 works, the exciter 400 can drive the sound board 102 in the sound emitting screen 100 to generate physical displacement and deformation, so that the sound board 102 emits sound. Since the sound panel 102 and the optical screen sheet 101 in the sound panel 100 are bonded by the screen sheet bonding layer 103, the sound panel 102 applies a force to the optical screen sheet 101 when the sound panel 102 is physically displaced and deformed. When the optical curtain sheet 101 receives the force of the sound board 102, the contact portion of the optical curtain sheet 101 with the housing 200 is extremely easily damaged.
For this reason, a shock absorbing structure (not shown in fig. 7) may be provided at a position where the frame body 200 is in contact with the sound emitting screen 100, by which the probability of occurrence of damage when the portion of the sound emitting screen 100 where the optical screen sheet 101 is in contact with the frame body 200 is subjected to the force of the sound emitting plate 200 can be reduced. By way of example, the material of the shock absorbing structure may be shock absorbing foam or shock absorbing rubber, etc.
In the embodiment of the present application, the exciter 400 in the projection screen 000 needs to be fastened to one of the cover plate 300 and the sound emitting screen 100 by means of an adhesive, and the exciter 400 has no fastening relationship with the other of the cover plate 300 and the sound emitting screen 100. For example, regarding the connection relationship among the exciter 400, the cover plate 300 and the sound emitting screen 100, the following two alternative implementations are schematically illustrated in the embodiments of the present application:
In a first alternative implementation manner, as shown in fig. 9, fig. 9 is a schematic diagram of a connection relationship among an exciter, a cover plate and a sound emitting screen in a projection screen according to an embodiment of the present application. The exciter 400 may be bonded to a side of the cover plate 300 adjacent to the sound emitting screen 100 through the vibration-damping bonding layer A1, and the exciter 400 may also be in contact with the sound emitting screen 100. For example, the actuator 400 may be in contact with a side of the sound board 102 of the sound screen 100 that is remote from the optical curtain sheet 100.
Regarding the structure of the vibration damping adhesive layer, the embodiment of the present application will be schematically described by taking the following two cases as examples:
In the first case, the shock absorbing adhesive layer may include: damping foam and double faced adhesive tape positioned on two sides of the damping foam. The damping foam may be adhered to the exciter 400 by double-sided tape, and the damping foam may be adhered to a side of the cover plate 300 adjacent to the sound emitting screen 100 by double-sided tape. A gap exists between the exciter 400 and a side of the cover plate 300 adjacent to the sound emitting screen 100, and the damping foam may be filled in the gap. The thickness of the foam may range from 0.2 mm to 0.5 mm.
In the second case, the shock absorbing adhesive layer may include: a layer of modified rubber material. The thickness of the modified rubber material layer may be 2mm to 2.5 mm. The modified rubber material layer has good flexibility and good adhesion. The modified rubber material layer also has the characteristics of high temperature resistance and low temperature resistance. For example, the modified rubber material layer is not prone to dripping at high temperatures and hardening and falling off at low temperatures, and the modified rubber material layer is capable of meeting the use environment of the projection screen 000 in a laser projection system. Meanwhile, the modified rubber material layer can ensure certain elasticity, and can better play a role in buffering in the reciprocating motion process of the exciter 400.
In this case, when the actuator 400 is operated, the actuator 400 pushes the sound board 102 in the sound panel 100 to displace away from the actuator 400, and under the action of gravity, the sound board 102 returns to its original position (i.e., is again in contact with the actuator 400), and then the sound board 102 is displaced away from the actuator 400 under the action of the actuator 400. In this way, the sound board 102 is repeatedly displaced in a direction away from the driver 400 and in a direction toward the driver 400, so that the sound board 102 forms sound.
In the embodiment of the present application, since the exciter 400 is not fastened to the sound board 102, the exciter 400 applies a small force to the cover plate 300 during operation, so as to effectively reduce the amplitude of the mechanical vibration at the connection position between the frame 200 and the cover plate 300 in the projection screen 000, and further reduce the volume of the noise at the connection position, so that the sound effect of the sound generated by the projection screen 000 is better.
In a second alternative implementation, as shown in fig. 10, fig. 10 is a schematic diagram of a connection relationship among an exciter, a cover plate and a sound board in another projection screen according to an embodiment of the present application. The actuator 400 may be bonded to the sound emitting screen 100 via an adhesive layer A2. For example, the actuator 400 may be bonded to a side of the sound emitting screen 100 away from the optical sheet 100 by an adhesive layer A2. The cover 300 has a shock absorbing structure (not shown in fig. 10) at a position contacting the actuator 400.
For example, the material of the adhesive layer A2 may be an adhesive such as glue, a glue film or a double sided tape. The material of the damping structure can be non-viscous damping material, or damping foam or damping rubber and the like.
In this case, when the exciter 400 is operated, the exciter 400 drives the sound board 102 in the sound panel 100 to generate physical displacement and deformation, so that the sound board 012 can generate sound.
In the embodiment of the application, since the exciter 400 is not fastened to the cover plate 300, and the shock absorbing structure is disposed between the exciter 400 and the cover plate 300, when the exciter 400 works, the shock absorbing structure can counteract the acting force applied to the cover plate 300 by a part of the exciter 400, so that the acting force is smaller, the amplitude of the mechanical vibration at the connection position between the frame 200 and the suspension support assembly 200 in the sound generating screen 100 is effectively reduced, and the volume of the noise at the connection position is further reduced, so that the sound effect of the sound generated by the projection screen 000 is better.
Optionally, as shown in fig. 7, the projection screen 000 may further include: the damper 600 is located between the first end of the cover 300 and the frame 200. The shock absorbing member 600 may be respectively engaged with the first end of the cover plate 300 and the frame 200 in the projection screen 000. The shock absorbing member 600 may be supported by a shock absorbing material, for example, a damping material such as butyl rubber or polyurethane foam. By providing the damper 600 between one end of the cover 300 and the frame 200, the collision force generated when the frame 200 collides with the cover 300 can be absorbed, and the sound volume of noise occurring at the connection position between the frame 200 and the cover 300 can be further reduced.
In the embodiment of the present application, as shown in fig. 7 and 11, fig. 11 is a schematic structural view of a shock absorbing member according to the embodiment of the present application. The damper 600 in the projection screen 000 has a first clamping structure 601, and the frame 200 in the projection screen 000 has a second clamping structure (not shown in fig. 7) clamped with the first clamping structure 601. The first clamping structure 601 and the second clamping structure can be clamped with each other, so that the damper 600 and the frame 200 of the sound emitting screen 100 can be clamped with each other.
In an exemplary implementation, the first clamping structure 601 on the shock absorbing member 600 may be a clamping structure with a first protrusion, and the second clamping structure on the frame 200 may be a clamping structure with a first groove. Wherein the shape of the first protrusion matches the shape of the first recess. The first protrusion may be located in the first groove to implement a clamping connection between the first clamping structure 601 and the second clamping structure.
In another exemplary implementation, the first clamping structure 601 on the shock absorbing member 600 may be a clamping structure with a second groove, and the second clamping structure on the frame 200 may be a clamping structure with a second protrusion. Wherein the shape of the second protrusion matches the shape of the second recess. The second protrusion may be located in the second groove, so as to implement a clamping connection between the first clamping structure 601 and the second clamping structure.
In the embodiment of the present application, as shown in fig. 7 and 11, the shock absorbing member 600 in the projection screen 000 further has a third clamping structure 602, and one end of the cover plate 300 in the projection screen 000 has a fourth clamping structure 301 clamped with the third clamping structure 602. The third clamping structure 602 and the fourth clamping structure 301 can be clamped with one end of the cover plate 300 by the clamping between the damper 600 and one end of the cover plate 300.
In an exemplary implementation, the third clamping structure 602 on the shock absorbing member 600 may be a clamping structure having a third protrusion, and the fourth clamping structure 301 on one end of the cover plate 300 may be a clamping structure having a third recess. Wherein the shape of the third protrusion matches the shape of the third recess. The third protrusion may be located in the third groove, so as to implement a clamping connection between the third clamping structure 602 and the fourth clamping structure 301.
In another exemplary implementation, the third clamping structure 602 on the shock absorbing member 600 may be a clamping structure having a fourth groove, and the fourth clamping structure 301 on one end of the cover plate 300 may be a clamping structure having a fourth protrusion. Wherein the shape of the fourth protrusion matches the shape of the fourth recess. The fourth protrusion may be located in the fourth groove to implement the clamping between the third clamping structure 602 and the fourth clamping structure 301.
It should be noted that, fig. 7 and fig. 11 illustrate an example in which the first fastening structure 601 on the damper 600 of the projection screen 000 is a fastening structure having a first protrusion, the third fastening structure 602 on the damper 600 is a fastening structure having a fourth recess, the second fastening structure on the frame 200 in the projection screen 000 is a fastening structure having a first recess, and the fourth fastening structure 301 on one end of the cover 300 in the suspension bracket 200 is a fastening structure having a fourth protrusion.
In the related art, as shown in fig. 1 and 2, the projection screen may further include: a suspension member 06. The frame 02 of the projection screen has a locking groove 02a corresponding to the hanging member 06. The hanging piece 06 in the projection screen can be provided with a clamping hook 06a clamped with the clamping groove 02a, and the detachable connection between the hanging piece 06 and the frame 02 can be realized through the clamping connection between the clamping hook 06a and the clamping groove 02a. The suspension member 06 in the projection screen also has a fastening screw 06b, by means of which fastening screw 06b the suspension member 06 can be fixed to a wall. Thus, after the hanging piece 06 is fixed on the wall, when the hanging piece 06 is clamped with the clamping groove 02a on the frame 02 through the clamping hook 06a, the structure formed by the sound emitting screen 01, the cover plate 03 and the sound generator 04 can be hung on the wall, so that the projection screen is fixed on the wall. In general, the number of cover plates 03 in the projection screen may be two, and the number of hanging members 06 may be two. When the exciter 04 in the projection screen works, the exciter 04 in the exciting vibration state drives the cover plate 03 to vibrate mechanically, and as the two ends of the cover plate 03 are fixedly connected with the frame 02, the cover plate 03 in the vibrating state drives the frame 02 to vibrate mechanically. In this way, noise is easily generated due to collision at the connection position between the cover 03 and the frame 02 and at the connection position between the frame 02 and the hanger 06.
In an embodiment of the present application, as shown in fig. 6, the projection screen 000 may further include: a hanger 500 on a first end of the cover plate 300. Thus, the cover plate 300 and the hanger 500 are integrated in one piece in the embodiment of the present application. In the present application, the number of the cover plates 300 in the projection screen 000 may be two, the number of the hanging members 500 may be two, and the two cover plates 300 may correspond to the two hanging members 500 one by one, and each hanging member 500 may be connected to the first end of the corresponding cover plate 300.
In this case, the hanger 500 in the projection screen 000 is connected to only the first end of the cover plate 300 and is not connected to the frame 200 in the projection screen 000, and the cover plate 300 is also connected to the frame 200 at only one end and is not necessarily connected to the frame 200 in the sound emitting screen 100 at the other end. The number of the connection positions between the frame body 200 and the cover plate 300 and between the cover plate 300 and the hanging pieces 500 in the sound production screen 100 is effectively reduced, when the exciter 400 in the projection screen works, the exciter 400 in the excited vibration state only drives the cover plate 03 to perform mechanical vibration, and the amplitude of the mechanical vibration phenomenon of the cover plate 300 is smaller, so that noise with smaller volume is only generated at the connection position of the cover plate 300 and the frame body 200 in the projection screen 000. The volume of noise occurring at the connection position between the frame 200 and the cover 300 and the hanger 500 in the projection screen 000 during the sound production of the projection screen 000 is further reduced, thereby further improving the sound effect of the sound produced by the projection screen 000.
For example, in the related art, as shown in fig. 1, the number of connection positions between the frame 02 and the cover 03 and the hanging member 06 in the projection screen is 6 (the connection positions are positions marked by broken line circles in fig. 1); in the embodiment of the present application, as shown in fig. 6, the number of connection positions between the frame 200 and the suspension 500 and the cover 300 in the sound emitting screen 100 is 2 (the connection positions are marked by dotted circles in fig. 6).
In an embodiment of the present application, the hanger 500 in the projection screen 000 may include: a plurality of fastening holes 501 are provided on the first end of the cover plate 300 in the projection screen 000. The shape and the size of the fastening holes 501 on the first end of the cover plate 300 in the projection screen 000 may be the same, for example, the fastening holes 501 on the first end of the cover plate 300 in the projection screen 000 may be circular holes with the same diameter. The suspension 500 in projection screen 000 can further include: a fastening screw 502 for passing through any one fastening hole 501 among the plurality of fastening holes 501.
In an embodiment of the present application, the plurality of fastening holes 501 located on the first end of the cover plate 300 may be through holes. The fastening screw 502 in the hanger 500 to which the first end of the cover plate 300 is coupled may be sized to match the size of the through hole.
In this manner, after the fastening screw 502 passes through any one of the fastening holes 501 of the plurality of fastening holes 501 on the first end of the cover plate 300, the fastening screw 502 may be fixedly coupled with the wall. After that, the frame 200 of the projection screen 000 is engaged with the first end of the cover 300 by the damper 600, so that the sound emitting screen 100 can be suspended on the wall.
Alternatively, in the above-described embodiment, fig. 6 and 7 are schematically illustrated by taking the example that the number of cover plates 300 in the projection screen 000 may be two. In other alternative implementations, the number of cover plates 300 in the projection screen 000 may be 4, which is not limited in this embodiment of the present application. The plurality of cover plates 300 in the projection screen 000 may be uniformly distributed over the sound emitting screen 100 in the projection screen 000.
In an embodiment of the present application, the number of the drivers 400 in the projection screen 000 may be plural, in which case the number of the drivers 400 may be the same as the number of the cover plates 300, in which case the drivers 400 may be in one-to-one correspondence with the suspension support assemblies 200, and 1 driver 400 may be disposed between each cover plate 300 and the sound board 102 in the sound panel 100. In another case, the number of the plurality of drivers 400 may be different from the number of the plurality of suspension support assemblies 200, in which case at least two drivers 400 may correspond to one cover plate 300, for example, 2 or 3 drivers 400 may be provided between each cover plate 300 and the sound board 102 in the sound board 100.
Optionally, as shown in fig. 6 and 7, the projection screen 000 may further include: a bar-shaped support plate 700. Both ends of the support plate 700 may be fixedly coupled to the frame 200 in the projection screen 000. For example, both ends of the support plate 700 may be fixedly coupled to the frame 200 by screws. Wherein, the support plate 500 can support the sound emitting screen 100 in the projection screen 000, prevent the sound emitting screen 100 from collapsing at the center, and improve the stability of the projection screen 000.
In connection with the above embodiments, the following embodiments schematically illustrate the manner in which the projection screen 000 is mounted on a wall:
First, the cover plate 300 of the projection screen 000 may be fixed to a wall by the hanging member 500.
Thereafter, the exciter 400 may be assembled on the cover plate 300, or the exciter 400 may be assembled on a side of the sound board 102 away from the optical curtain within the sound screen 100 in the projection screen 000.
Finally, the frame 200 in the projection screen 000 may be clamped to the first end of the cover plate 300 by the shock absorbing member 600, so as to hang the structure formed by the sound emitting screen 100 and the frame 200 on a wall.
In summary, the projection screen provided in the embodiment of the present application includes: sound emitting screen, framework, apron and exciter. The cover plate is strip-shaped, the first end of the cover plate can be connected with the frame body, the second end of the cover plate is not connected with the frame body, and the exciter is only connected with one of the sound emitting screen and the cover plate, so that the exciter is prevented from being fixed in a limited space formed between the cover plate and the sound emitting screen. Therefore, when the projection screen vibrates in a high-frequency mode in the sounding process, the acting force applied by the exciter to the cover plate is small, the amplitude of the phenomenon of mechanical vibration of the cover plate is effectively reduced, the volume of noise at the connection position of the cover plate and the frame body is further reduced, and the sound effect of sound emitted by the projection screen is improved.
The embodiment of the application also provides a laser projection system which can be an ultra-short focal laser projection system. As shown in fig. 12, fig. 12 is a schematic structural diagram of a laser projection system according to an embodiment of the present application. The laser projection system may include: a projection screen 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 is operated, the laser projection device 001 can emit light rays obliquely upward, so that the laser projection device 001 can project a picture to the projection screen 000; the laser projection device 001 may also send an acoustic electrical signal to an exciter in the projection screen 000 so that the projection screen 000 may sound while displaying a projected picture.
In the present disclosure, 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" refers to two or more, unless explicitly defined otherwise.
The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but is intended to cover all modifications, equivalents, alternatives, and improvements falling within the spirit and principles of the application.
Claims (8)
1. A projection screen, comprising:
A sound emitting screen;
The frame body is connected with the edge of the sound production screen;
the first end of the strip-shaped cover plate is connected with the frame body, and the second end of the cover plate is in a suspended state;
the exciter is positioned between the cover plate and the sound-producing screen, is connected with one of the sound-producing screen and the cover plate, and is used for driving the sound-producing screen to vibrate so as to produce sound;
And a hanger on the first end of the cover plate, the hanger being integral with the cover plate and the hanger comprising: a plurality of fastening holes provided on the first end of the cover plate, and a fastening screw for passing through any one of the plurality of fastening holes.
2. The projection screen of claim 1 wherein the projection screen is configured to display the image of the object,
The exciter and one side of the cover plate, which is close to the sound-emitting screen, are bonded through a damping bonding layer, and the exciter is in contact with the sound-emitting screen.
3. The projection screen of claim 1 wherein the projection screen is configured to display the image of the object,
The exciter is adhered to the sound production screen through an adhesive layer, and a shock absorption structure is arranged at the contact position of the cover plate and the exciter.
4. A projection screen according to any one of claims 1 to 3, wherein,
The projection screen further comprises: the damping piece is positioned between the first end of the cover plate and the frame body, and the damping piece is respectively clamped with one end of the cover plate and the frame body.
5. The projection screen of claim 4 wherein the projection screen is configured to display the image of the object,
The shock absorber has a first clamping structure, and the frame body has a second clamping structure connected with the first clamping structure.
6. The projection screen of claim 4 wherein the projection screen is configured to display the image of the object,
The damping piece is provided with a third clamping structure, and the first end of the cover plate is provided with a fourth clamping structure connected with the third clamping structure.
7. A projection screen according to any one of claims 1 to 3, wherein,
The sound generating screen is of a rectangular plate-shaped structure, the frame body is a rectangular frame body matched with the shape of the sound generating screen, and the frame body is provided with a clamping groove clamped with the edge of the sound generating screen.
8. A laser projection system, comprising: a laser projection device, and a projection screen as claimed in any one of claims 1 to 7, said laser projection device being electrically connected to an exciter in said projection screen.
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| CN202010857228.8A CN114095709B (en) | 2020-08-24 | 2020-08-24 | Projection screen and laser projection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010857228.8A CN114095709B (en) | 2020-08-24 | 2020-08-24 | Projection screen and laser projection system |
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| CN114095709A CN114095709A (en) | 2022-02-25 |
| CN114095709B true CN114095709B (en) | 2024-05-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN208110252U (en) * | 2018-05-02 | 2018-11-16 | 四川长虹电器股份有限公司 | A kind of Self-sounding projection optics screen |
| CN208273238U (en) * | 2018-05-25 | 2018-12-21 | 四川长虹电器股份有限公司 | Sounding panel, hard screen and device |
| CN210090908U (en) * | 2019-06-17 | 2020-02-18 | 青岛海信电器股份有限公司 | Display device |
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2020
- 2020-08-24 CN CN202010857228.8A patent/CN114095709B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN208110252U (en) * | 2018-05-02 | 2018-11-16 | 四川长虹电器股份有限公司 | A kind of Self-sounding projection optics screen |
| CN208273238U (en) * | 2018-05-25 | 2018-12-21 | 四川长虹电器股份有限公司 | Sounding panel, hard screen and device |
| CN210090908U (en) * | 2019-06-17 | 2020-02-18 | 青岛海信电器股份有限公司 | Display device |
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