WO2022042497A1 - 投影屏幕及激光投影*** - Google Patents

投影屏幕及激光投影*** Download PDF

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Publication number
WO2022042497A1
WO2022042497A1 PCT/CN2021/114134 CN2021114134W WO2022042497A1 WO 2022042497 A1 WO2022042497 A1 WO 2022042497A1 CN 2021114134 W CN2021114134 W CN 2021114134W WO 2022042497 A1 WO2022042497 A1 WO 2022042497A1
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WIPO (PCT)
Prior art keywords
sound
emitting
projection screen
screen
projection
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Application number
PCT/CN2021/114134
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English (en)
French (fr)
Inventor
邢哲
魏伟达
徐虹哲
戴洁
Original Assignee
青岛海信激光显示股份有限公司
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Publication of WO2022042497A1 publication Critical patent/WO2022042497A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens

Definitions

  • the present application relates to the technical field of laser projection, and in particular, to a projection screen and a laser projection system.
  • the laser projection system includes a projection screen and a laser projection system.
  • the laser projection equipment can project images on the projection screen to realize functions such as video playback.
  • a sound-emitting screen is a screen that can emit sound. It can emit sound as a sound while displaying a picture, and the user experience is better.
  • the sound generation screen generally includes a display function layer, an auxiliary sound generation layer, and a plurality of speakers, wherein the display function layer is used to realize the display function, and the speakers are used to drive the auxiliary sound generation layer to vibrate under the driving of electricity, and then emit sound.
  • some embodiments of the present application provide a projection screen, comprising: an optical screen; a sound-emitting plate connected to the optical screen, the sound-emitting plate has two sound-emitting regions; a strip-shaped first support portion , the first support part is bonded to the side of the sound-emitting plate away from the optical screen, and the first support part is located between the two sound-emitting areas; and, with the sound-emitting plate away from the optical screen.
  • the two groups of sound-emitting parts are connected, and the two groups of sound-emitting parts are respectively located in the two sound-emitting areas.
  • some embodiments of the present application provide a laser projection system, including: a laser projection device, and the above-mentioned projection screen, wherein the laser device is electrically connected to an exciter in the projection screen.
  • 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 top view of a projection screen provided by an embodiment of the present application.
  • Fig. 4 is an exploded view of the projection screen shown in Fig. 3;
  • FIG. 5 is a top view of another projection screen provided by an embodiment of the present application.
  • FIG. 6 is a top view of another projection screen provided by an embodiment of the present application.
  • FIG. 7 is an exploded view of yet another projection screen provided by an embodiment of the present application.
  • FIG. 8 is an effect diagram of a sounding board provided in an embodiment of the present application when it is in a multi-mode state
  • FIG. 9 is an exploded view of a sounding part provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a laser projection system provided by an embodiment of the present application.
  • 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
  • the projection screen includes: a sound-emitting screen 01 , a frame 02 , a cover 03 , an exciter 04 and a shock-absorbing frame 05 .
  • the sound-emitting screen 01 includes: an optical screen 011 and a sound-emitting plate 012, and a screen bonding layer 013 located therebetween.
  • the shock-absorbing frame 05 surrounds the sound-emitting screen 01 and is connected to the edge of the sound-emitting screen 01 .
  • the frame body 02 is connected to the shock-absorbing frame 05 .
  • the cover plate 03 is strip-shaped, and both ends of the cover plate 03 are connected to the frame body 02 .
  • the exciter 04 is located between the sound-emitting screen 01 and the cover plate 03 , and the exciter 04 is connected to the side of the sound-emitting plate 012 in the sound-emitting screen 01 away from the optical screen 011 .
  • the exciter 04 can drive the sounding board 012 in the sounding screen 01 to vibrate to produce sound.
  • the number of cover plates 03 in the projection screen is two, and the projection screen further includes: a support plate 06 located between the two cover plates 03 , and the support plate 06 can support the sound-emitting screen 100 , to prevent the phenomenon of central collapse of the sounding screen 01.
  • the number of the exciters 04 between each cover plate 03 and the sound-emitting plate 012 in the projection screen may be one or more.
  • the multiple exciters 04 in the projection screen need to work simultaneously, which will simultaneously drive the sound plate 012 to generate physical displacement and deformation, resulting in poor stereo effect of the sound emitted by the projection screen.
  • the exciter 04 in the projection screen includes: an exciter 04a and an exciter 04b.
  • the area connected to the exciter 04a is the first area 012a
  • the area connected to the exciter 04b is the second area 012b.
  • FIG. 3 is a top view of a projection screen provided by an embodiment of the present application
  • FIG. 4 is an exploded view of the projection screen shown in FIG. 3
  • the projection screen 000 includes: an optical screen 100 , a sounding plate 200 , a first support part 300 and two groups of sounding parts 400 .
  • the optical screen 100 is connected to the sound-emitting plate 200 .
  • the structure formed by connecting the optical screen 100 and the sound-emitting plate 200 is called a sound-emitting screen.
  • the sound-emitting panel 200 has two sound-emitting areas, namely: a first sound-emitting area 200a and a second sound-emitting area 200b.
  • the first support portion 300 is in the shape of a strip, and the first support portion 300 is bonded to the side of the sound-emitting plate 200 away from the optical screen 100 .
  • the first support part 300 may be located between the two sound emission areas, for example, the first support part 300 is located between the first sound emission area 200a and the second sound emission area 200b.
  • the two groups of sound-emitting parts 400 are both connected to the side of the sound-emitting plate 200 away from the optical screen 100 .
  • the two groups of sound-emitting parts 400 are located in the two sound-emitting areas, respectively.
  • one of the two groups of sound-emitting parts 400 is located in the first sound-emitting area 200a, and the other is located in the second sound-emitting area 200b.
  • a group of sound-emitting parts 400 located in the first sound-emitting area 200a and another group of sound-emitting parts 400 located in the second sound-emitting area 200b work simultaneously.
  • the first sound producing area 200a produces physical displacement and deformation, so that the first sound producing area 200a produces sound
  • the second sound producing area 200a also produces physical displacement and deformation, so that the second sound producing area 200b can also produce sound.
  • the first support portion 300 is bonded to the side of the sound-emitting plate 200 away from the optical screen 100, and the first support portion 300 is located between the first sound-emitting area 200a and the second sound-emitting area 200b, the sound-emitting plate 200 and At least a part of the area in contact with the first support part 300 will not be physically displaced or deformed.
  • the probability of mutual interference between the physical displacement and deformation generated by the first sound-emitting area 200a and the physical displacement and deformation generated by the second sound-emitting area 200b can be reduced, thereby reducing the sound emitted by the first sound-emitting area 200a and the The probability of mutual interference between the sounds emitted by the second sound-emitting areas 200b effectively improves the stereo effect of the sounds emitted by the projection screen.
  • the projection screen provided by the embodiments of the present application includes: an optical screen, a sound-emitting plate, a first support part, and two sets of sound-emitting parts.
  • both the first sounding area and the second sounding area in the sounding board can generate physical displacement and deformation, so that both the first sounding area and the second sounding area can emit sound.
  • the first support portion can be bonded to the side of the sound-emitting plate away from the optical screen, and the first support portion is located between the first sound-emitting area and the second sound-emitting area, at least the contact between the sound-emitting plate and the first support portion Some areas do not have physical displacement and deformation.
  • the probability of mutual interference between the physical displacement and deformation of the first sound-emitting area and the physical displacement and deformation of the second sound-emitting area is reduced, thereby reducing the sound emitted by the first sound-emitting area and the sound emitted by the second sound-emitting area.
  • the probability of mutual interference between the sounds effectively improves the stereo effect of the sound emitted by the projection screen.
  • FIG. 5 is a top view of another projection screen provided by an embodiment of the present application.
  • the projection screen 000 includes: a sounding board 200 .
  • both the first sound emission area 200a and the second sound emission area 200b in the projection screen 000 are located in the area where the sound emission panel 200 is located.
  • the projection screen 000 includes a sound-emitting plate 200
  • the boundary of the orthographic projection of the sound-emitting plate 200 on the optical screen 100 coincides with the border of the side of the optical screen 100 close to the sound-emitting plate 200 .
  • the first support portion 300 in the projection screen 000 is bonded to the side of the sound emitting plate 200 away from the optical screen 100 by an adhesive layer (not marked in FIG. 5 ).
  • the orthographic projection of the first support portion 300 on the sound-emitting board 200 may coincide with the orthographic projection of the adhesive layer on the sound-emitting board 200 .
  • the adhesive layer may be an adhesive such as glue, adhesive film or double-sided tape.
  • the first support portion 300 and the sounding board 200 are fastened and connected by surface bonding.
  • the fastening connection between the first support part 300 and the sounding board 200 is realized by surface bonding, all areas of the sounding board 200 in contact with the first support part 300 will not be physically displaced and deformed.
  • the probability of mutual interference between the sound emitted by the first sound emission area 200a and the sound emitted by the second sound emission area 200b in the sound emission panel 200 is further reduced, thereby further improving the sound quality of the projection screen 000. Stereo effect.
  • the orthographic projection of the first support portion 300 in the projection screen 000 on the sound-emitting panel 200 is located in the central area of the sound-emitting panel 200 .
  • the first support part 300 can divide the area where the sounding board 200 is located into two sounding regions with the same area, that is, the area of the first sounding region 200a on the sounding board 200 is the same as the area of the second sounding region 200b.
  • the loudness of the sound emitted by the first sound generating area 200a is approximately the same as the loudness of the sound emitted by the second sound generating layer 102b, which further improves the stereo effect of the sound emitted by the projection screen 000.
  • FIG. 6 is a top view of yet another projection screen provided by an embodiment of the present application.
  • the projection screen 000 includes: two sounding boards 200 . There is a gap d between the two sounding boards 200 .
  • the first sound emission area 200a and the second sound emission area 200b in the projection screen 000 may be located in the areas where the two sound emission panels 200 are located, respectively.
  • the projection screen 000 includes two sound-emitting panels 200, assuming that the two sound-emitting panels 200 and the optical screen 100 are both rectangular plate-like structures, the three edges of the orthographic projection of each sound-emitting panel 200 on the optical screen 100 can be It coincides with the three edges of the side of the optical screen 100 close to the sound-emitting plate 200 .
  • the projection screen 000 since there is a gap d between the two sound-emitting boards 200 in the projection screen 000, and the two sound-emitting areas are located in the regions where the two sound-emitting boards 200 are located, when the projection screen 000 emits sound, the first sound
  • the physical displacement and deformation generated by the sound-emitting area 200a and the physical displacement and deformation generated by the second sound-emitting area 200b will not interfere with each other, avoiding the sound emitted by the first sound-emitting area 200a and the sound emitted by the second sound-emitting area 200b.
  • There is a probability of mutual interference between the sounds thereby effectively improving the stereo effect of the sound emitted by the projection screen 000 .
  • the first support portion 300 in the projection screen 000 and the side of the two sounding boards 200 away from the optical screen 100 are both bonded by an adhesive layer (not marked in FIG. 6 ).
  • the adhesive layer may be an adhesive such as glue, adhesive film or double-sided tape.
  • the shape and size of the two sound-emitting panels 200 in the projection screen 000 are the same.
  • the area of the first sound emission area 200a in the projection screen 000 is the same as the area of the second sound emission area 200b.
  • the loudness of the sound emitted by the first sound-emitting area 200a is approximately the same as the loudness of the sound emitted by the second sound-emitting layer 102b, which further improves the stereo effect of the sound emitted by the projection screen 000.
  • the projection screen 300 may further include: a strip-shaped second support part 600 connected with the first support part 300 .
  • the length direction of the second support portion 600 intersects with the length direction of the first support portion 300 .
  • the longitudinal direction of the second support portion 600 is perpendicular to the longitudinal direction of the first support portion 300 .
  • the number of the second support parts 600 in the projection screen 000 may be multiple.
  • the number of the second support parts 600 may be two, any one of the two second support parts 600 may be connected to one end of the first support part 300 , and the other may be connected to the other end of the first support part 300 connect.
  • the first support part 300 and the two second support parts 600 can form an "I"-shaped support frame.
  • the "I"-shaped support frame can effectively support the sound-emitting screen composed of the optical screen 100 and the sound-emitting plate 200, and effectively prevent the sound-emitting screen from collapsing in the central area.
  • the "I"-shaped support frame formed by the first support portion 300 and the two second support portions 600 may be an integral structure. That is, an "I"-shaped support frame having the first support portion 300 and the two second support portions 600 can be simultaneously formed through one machining process or an abrasive tool forming process.
  • the second support portion 600 in the projection screen 000 is bonded to the side of the sound emitting panel 200 away from the optical screen 100 .
  • the "I"-shaped support frame formed by the first support part 300 and the two second support parts 600 can better support the sound screen composed of the sound plate 200 and the optical screen 100 .
  • the second support portion 600 and the side of the sound emitting plate 200 away from the optical screen 100 may be bonded by means of dispensing. Since the adhesive dispensing method can reduce the amount of adhesive, the cost of supporting the projection screen 000 can be greatly reduced by using the adhesive dispensing method.
  • the material of the cover plate 401 can be selected from a light-weight and high-strength metal material such as aluminum alloy or magnesium alloy.
  • FIG. 7 is an exploded view of still another projection screen provided by some embodiments of the present application, and the projection screen 000 may further include: a frame body 500 .
  • the frame body 500 is connected to the edge of the sound-emitting screen composed of the optical screen 100 and the sound-emitting panel 200 .
  • the frame body 500 may generally be a ring-shaped frame body matching the shape of the sound-emitting screen. In this way, the frame body 500 may surround the sound-emitting screen and be connected to the edge of the sound-emitting screen.
  • the sound emitting screen is a rectangular plate-like structure
  • the frame body 500 is a rectangular ring-shaped frame body.
  • the first support part 300 and the second support part 600 Since the support frame formed by the first support part 300 and the second support part 600 is bonded to the side of the sound plate 200 away from the optical screen 100 to realize the fastening with the sound plate 200, the first support part 300 Neither the second support part 600 is fastened to the frame body 500 by screws, which effectively reduces the thickness of the projection screen 000 and improves the aesthetics of the projection screen 000 .
  • a group of sound-emitting parts 400 in each sound-emitting area in the projection screen 000 may include: at least one sound-emitting part 400 .
  • each group of sound-emitting parts 400 includes one sound-emitting part 400 for schematic illustration.
  • both groups of sound-emitting parts 400 in the projection screen 000 may include multiple sound-emitting parts 400 , and the number of sound-emitting parts 400 included in each group of sound-emitting parts 400 may be the same or different. This embodiment of the present application does not limit this.
  • each sound-emitting part 400 in the projection screen 000 includes: a strip-shaped cover plate 401 bonded to the side of the sound-emitting plate 200 away from the optical screen 100 , and a sound-emitting plate 200 located in the cover plate 401 and the projection screen 000 between the exciters 402 .
  • each sounding part 400 may include: one or more exciters 402
  • FIG. 6 is a schematic illustration of each sounding part 400 including two exciters 402 as an example.
  • the exciter 402 can be connected to the cover plate 401 and the side of the sounding plate 200 away from the optical screen 100 respectively. In this way, when the exciter 402 is working, the exciter 300 can drive the sounding plate 200 to produce physical displacement and deformation, thereby making the sounding plate 200 vocalizations.
  • the two ends of the cover plate 03 in the projection screen are usually fastened to the frame 02 by screws.
  • the exciter 04 when the exciter 04 is working, the exciter 04
  • the cover plate 03 will inevitably be driven to vibrate, and the cover plate 03 in the state of mechanical vibration will often collide with the cover plate 03 to generate noise, which will directly affect the sound effect of the projection screen.
  • the cover plate 401 in the projection screen 000 is not connected with the frame body 500, the cover plate 401 is firmly connected with the sound-emitting plate 200 by means of bonding.
  • the exciter 402 between the plate 200 and the cover plate 401 is working, even if the exciter 402 drives the cover plate 401 to vibrate, the exciter 402 will not collide with the frame body 500 to generate noise, which is effective. The sound effect of the sound emitted by the projection screen 000 is improved.
  • the projection screen 000 further includes: a screen bonding layer 700 located between the optical screen 100 and the sound-emitting plate 200 , and the optical screen 100 is bonded through the screen The layer 700 is bonded to the sound-emitting panel 200 .
  • the frame body 500 of the projection screen 000 is connected to the edge of the sound-emitting screen.
  • the plurality of exciters 402 between the cover plate 401 in the projection screen 000 and the sound-emitting plate 200 are all electrically connected to the laser projection device, and the laser projection device can send a signal to each exciter 402 during operation. sound electrical signal. Since each exciter 402 can be fixedly connected to the side of the sound-emitting plate 200 away from the optical screen 100, after receiving the sound-electrical signal, each exciter 402 can reciprocate based on the sound-electrical signal, thereby driving sound production The entire surface of the plate 200 vibrates together, so that the sound-emitting plate 200 emits sound, so that the projection screen 000 can emit sound when the laser projection device is working.
  • the sound-emitting panel 200 in the projection screen 000 includes: a plate-shaped aluminum honeycomb core layer, and glass fiber skins located on both sides of the aluminum honeycomb core layer.
  • Each exciter 402 can be connected to one fiberglass skin in the sound-emitting panel 200 , while the other fiberglass skin needs to be bonded to the optical screen 100 through the screen bonding layer 700 .
  • FIG. 8 is an effect diagram of a sounding board provided by an embodiment of the present application when it is in a multi-mode state.
  • the The sound generated by the vibration of the sounding board 200 is multimodal on the entire surface of the sounding board 200 , so that the sounding board 200 can vibrate together at multiple positions on the surface as a whole, so that the front of the sounding board 200 can emit sound.
  • the thickness of the sounding plate 102 may range from 2 mm to 10 mm.
  • the thickness of the sounding plate 102 may be 5 millimeters.
  • the optical screen 100 in the projection screen 000 has a micro-mirror reflection structure, and the micro-mirror reflection structure can reflect the light emitted by the laser projection device in a specific direction. In this way, it can be ensured that the light reflected by the micro-mirror reflective structure can reach the user's eyes to the maximum extent, so that the user can watch a clearer picture.
  • the optical screen 100 may include: a circular Fresnel optical film, a black grid screen or a white plastic screen, and the like.
  • the thickness of the optical screen 100 may range from 0.5 mm to 1.7 mm.
  • the thickness of the optical screen 100 may be 1.0 mm.
  • the screen adhesive layer 700 in the projection screen 000 is an adhesive such as a glue film or double-sided tape.
  • the thickness of the screen bond layer 104 may range from 0.1 mm to 1 mm.
  • the curtain bond layer 104 may have a thickness of 0.5 mm.
  • the sound-emitting screen composed of the optical screen 100 and the sound-emitting panel 200 in the projection screen 000 is in the shape of a rectangular plate
  • the frame 500 in the projection screen 000 may include: A corresponding four strip structures.
  • the four strip structures are connected end to end to form a rectangular frame matching the shape of the sound-emitting screen.
  • any two adjacent strip structures may be connected by an L-shaped connecting piece, and the connecting piece and the strip structure are fastened and connected by screws.
  • the material of the frame body 500 in the projection screen 000 may be a metal material such as aluminum alloy or magnesium alloy.
  • each strip structure has a clip slot, and each strip structure can be clipped with a corresponding edge in the sound-emitting screen, so as to realize the connection between the frame body 500 and the sound-emitting screen.
  • the exciter 402 in the sounding part 400 in the projection screen 000 works, the exciter 402 can drive the sounding board 200 to generate physical displacement and deformation, so that the sounding board 200 emits sound. Since the sound-emitting plate 200 and the optical screen 100 are bonded together, when the sound-emitting plate 200 is physically displaced and deformed, the sound-emitting plate 200 will exert a force on the optical screen 100 . When the optical screen 100 is subjected to the force of the sound-emitting plate 200 , the contact portion between the optical screen 100 and the frame body 500 is easily damaged.
  • a shock absorbing structure (not marked in FIG. 5 ) can be provided at the position where the frame body 500 contacts the optical screen 100 , and the shock absorbing structure can reduce the part of the optical screen 100 in contact with the frame body 500 from being affected by the sound-emitting plate. Probability of damage at 200 force.
  • the material of the shock absorbing structure may be shock absorbing foam or shock absorbing rubber.
  • FIG. 9 is an exploded view of a sounding part provided by some embodiments of the present application.
  • a side of the cover plate 401 in the sound-generating part 400 close to the sound-generating plate 200 has a groove 401a matched with the exciter 402, and the exciter 402 can be located in the groove 401a. Since the exciter 402 is located in the groove 401a provided on the cover plate 401, and the cover plate 401 is bonded to the side of the sounding plate 200 away from the optical screen 100, it effectively eliminates the influence of the thickness of the exciter 402 on the projection screen. Therefore, the thickness of the projection screen 000 is further reduced, and the aesthetics of the projection screen 000 is improved.
  • the exciter 402 in the sounding part 400 needs to be tightly connected with the cover plate 401 .
  • the fastening connection between the exciter 402 and the cover plate 401 and some embodiments of the present application are schematically illustrated by taking the following two possible implementations as examples:
  • the thickness of the exciter 402 in the sound-emitting part 400 is the same as the depth of the groove 401 a in the cover plate 401 , so that the cover plate 401 and the sound-emitting plate 200 are glued on the side away from the optical screen 100 .
  • the exciter 402 in the cover plate 401 can be pressed tightly through the groove 401 a in the cover plate 401 , so as to realize the fast connection between the exciter 402 in the sound producing part 400 and the cover plate 401 .
  • the exciter 402 in the sound-emitting part 400 can be bonded to the groove 401a in the cover plate 401 through a shock-absorbing adhesive layer (not shown in FIG. 9 ), so as to realize the sound-emitting part 400
  • the actuator 402 can be tightly connected with the cover plate 401.
  • the shock-absorbing adhesive layer when the exciter 402 and the corresponding groove 401a in the cover plate 401 are bonded by the shock-absorbing adhesive layer, the hard contact between the exciter 402 and the cover plate 401 can be prevented, and the working time of the exciter 402 is reduced. Under the action of the cover plate 401 in the process, the probability of the mechanical vibration phenomenon of the cover plate 401 during the working process of the exciter 402 is reduced, and the noise generated by the cover plate 401 when the mechanical vibration phenomenon occurs can be reduced.
  • the volume increases the sound effect of the sound emitted by the projection screen 000 .
  • the shock-absorbing adhesive layer may include: shock-absorbing foam, and double-sided adhesive tapes located on both sides of the shock-absorbing foam.
  • the shock-absorbing foam and the exciter 402 are bonded by double-sided tape, and the shock-absorbing foam and the bottom surface of the corresponding groove 401a in the cover plate 401 can also be bonded by double-sided tape.
  • the thickness of the shock absorbing foam may range from 0.2 mm to 0.5 mm.
  • the shock-absorbing adhesive layer may include: a layer of modified rubber material.
  • the thickness of the modified rubber material layer may be 2 mm to 2.5 mm.
  • the modified rubber material layer has better flexibility and better adhesion.
  • the modified rubber material layer also has the properties of high temperature resistance and low temperature resistance.
  • the modified rubber material layer is not easy to drip at high temperature, and is not easy to harden and fall off at low temperature, and the modified rubber material layer can meet the usage environment of the projection screen 000 in the laser projection system.
  • the modified rubber material layer can ensure a certain elasticity, and can better play a buffering role during the reciprocating motion of the exciter 402 .
  • the plurality of exciters 400 between the cover plate 401 and the sound-emitting plate 200 in the projection screen 000 can be fixedly connected to the side of the sound-emitting plate 200 away from the optical screen 100 by bonding. Since the cover plate 401 of the projection screen 000 and the side of the sound-emitting plate 200 far away from the optical screen 100 are also connected by bonding, therefore, each exciter 400 and the side of the sound-emitting plate 200 far away from the optical screen 100, and the cover Both the board 401 and the side of the sound-emitting board 200 away from the optical screen 100 can be connected by an adhesive layer (not shown in FIG. 9 ).
  • the adhesive layer is located between the cover plate 401 and the sound-emitting plate 200 in the projection screen 000 , and the orthographic projection of the adhesive layer on the sound-emitting plate 200 may be with the cover plate 401 on the sound-emitting plate 200 .
  • the orthographic projections on are coincident. In this way, the cover plate 401 and the sounding board 200 are connected by surface bonding. When the cover plate 401 and the sounding plate 200 are connected by surface bonding, the cover plate 401 can be more firmly bonded to the sounding plate 200, which effectively improves the firmness of the connection between the two.
  • the adhesive layer between the cover plate 401 in the projection screen 000 and the sound-emitting plate 200 may be an adhesive such as a glue film or double-sided tape.
  • the material of the cover plate 401 can be selected from a light-weight and high-strength metal material such as aluminum alloy or magnesium alloy.
  • the frame body 02 in the projection screen has a card slot 02a.
  • the projection screen may also include: a suspension bracket 07 .
  • the suspension bracket 07 has a hook 07a that is engaged with the slot 02a, and the detachable connection between the suspension bracket 07 and the frame body 02 can be achieved through the hook 07a and the slot 02a.
  • the suspension bracket 07 also has a fastening screw 07b through which the suspension bracket 07 can be fixed on the wall. In this way, after the suspension bracket 07 is fixed on the wall, when the suspension bracket 07 is clamped with the slot 02a on the frame body 02 through the hook 07a, the sound-emitting screen 01, the cover plate 03 and the exciter 04 can be realized.
  • the structure is suspended from the wall, allowing the projection screen to be fixed to the wall.
  • the projection screen 000 has a side of the first support portion 300 away from the sound-emitting plate 200 , and a side of the second support portion 600 away from the sound-emitting plate 200 .
  • Each has a plurality of shock-absorbing protrusions 800 .
  • the plurality of shock-absorbing protrusions 800 may be evenly distributed on the side of the first support portion 300 away from the sound-emitting plate 200 and the side of the second support portion 600 away from the sound-emitting plate 200 .
  • the material of the shock-absorbing protrusion 800 may include shock-absorbing materials such as rubber, silicone, and foam.
  • the plurality of shock absorbing protrusions 800 fill the gap between the projection screen 000 and the wall.
  • the exciter 402 in the sound-emitting part 400 is working, the exciter 402 will drive the projection screen 000 to vibrate as a whole.
  • the sound effect of the sound produced by the screen 000 is a phenomenon of repeated collision between the walls, and the amplitude of the overall vibration of the projection screen 000 is weakened, thereby avoiding the phenomenon that the noise generated during the collision and the sound emitted by the projection screen 000 are mixed together, effectively improving the projection.
  • the sound effect of the sound produced by the screen 000 is a phenomenon of repeated collision between the walls, and the amplitude of the overall vibration of the projection screen 000 is weakened, thereby avoiding the phenomenon that the noise
  • the projection screen 000 further includes at least two suspension brackets 900 connected to the side of the second support portion 600 away from the sound-emitting plate 200 .
  • Each hanger 900 has a fastening screw 901 through which the hanger 900 can be fixed on the wall.
  • the optical screen 100 , the sound generating plate 200 , the first supporting part 300 , the sound generating part 400 and the second supporting part 600 can be fixed on the wall, that is, the projection screen 000 can be fixed on the wall.
  • the side of the second support part 600 of the projection screen 000 away from the sound-emitting plate 200 has at least two suspension brackets 900 corresponding to one-to-one.
  • each hanger 900 also has a second clip 902 connected to the corresponding first clip 601 .
  • the connection between the hanger 900 and the second support portion 600 can be achieved through the connection between the first clip 601 and the second clip 902.
  • the first clamping part 601 on the second support part 600 is a clamping part with a first clamping groove 601 a
  • the second clamping part on the suspension frame 900 902 is an engaging element having a first protrusion 902a matching the shape of the first engaging slot 601a.
  • the first protrusion 902a is located in the first clamping slot 601a to realize the connection between the first clamping member 601 and the second clamping member 902 .
  • the first latching member 601 on the second support portion 600 has a second protruding latching member
  • the second latching member 902 on the hanger 900 has a second protruding latching member.
  • the second protrusion is located in the second clamping slot, so as to realize the connection between the first clamping member 601 and the second clamping member 902 .
  • each hanger 900 may further include: a first clip in the second support part 600
  • the suspension damping layer 903 is arranged between the 601 and the second clip 902 . In this case, after the second clip 902 in the suspension frame 900 is connected to the suspension damping layer 903 , it is then connected to the first clip 601 in the second support portion 600 .
  • the suspension damping layer 903 can reduce the probability of the vibration phenomenon occurring at the connection position between the second support portion 600 and the suspension frame 900, thereby effectively
  • the stability of the second support part 600 hanging on the wall is improved, and the noise generated when the vibration phenomenon occurs at the connection position between the second support part 600 and the hanger 900 is also reduced, which further improves the projection screen. 000 sound effect.
  • the material of the suspension damping layer 903 is a damping material such as butyl rubber or polyurethane foam.
  • the suspension damping layer 903 on the suspension frame 900 has a card slot (not marked in FIG. 7 ) that matches the shape of the first protrusion 902a, and passes between the card groove, the first protrusion 902a and the first card slot 601a With the matching relationship, a suspension damping layer 903 can be provided between the first clip 601 and the second clip 902 .
  • the number of the suspension brackets 900 in the projection screen 000 may be four, that is, the projection screen 000 includes four suspension brackets 900.
  • the four suspension brackets 900 may be evenly distributed on the The two second support parts 600 in the projection screen 000 are on one side away from the sound-emitting plate 200 .
  • two of the four hanging brackets 900 may be connected with one second support part 600
  • the other two hanging brackets 400 may be connected with another second support part 600 .
  • the projection screen 000 is hung on the wall by the hanger 900, there is no included angle between the display surface of the projection screen 000 (that is, the surface where the optical screen 100 is located) and the wall, that is, the projection screen
  • the display surface of 000 is arranged parallel to the wall, which effectively improves the stability of the projection screen 000 hanging on the wall.
  • each suspension frame 900 and the connection manner between the suspension frame 900 and the second support portion 600 , reference may be made to the corresponding contents in the foregoing embodiments. This embodiment of the present application will not be repeated here.
  • the projection screen provided by the embodiments of the present application includes: an optical screen, a sound-emitting plate, a first support part, and two sets of sound-emitting parts.
  • both the first sounding area and the second sounding area in the sounding board can generate physical displacement and deformation, so that both the first sounding area and the second sounding area can emit sound.
  • the first support portion can be bonded to the side of the sound-emitting plate away from the optical screen, and the first support portion is located between the first sound-emitting area and the second sound-emitting area, at least part of the sound-emitting plate in contact with the first support portion Regions do not physically move or deform.
  • the probability of mutual interference between the physical displacement and deformation generated by the first sound-emitting area and the physical displacement and deformation generated by the second sound-emitting area is reduced, thereby reducing the sound emitted by the first sound-emitting area and the sound emitted by the second sound-emitting area.
  • the probability of mutual interference between the sounds effectively improves the stereo effect of the sound emitted by the projection screen.
  • the embodiment of the present application also provides a laser projection system.
  • the laser projection system is an ultra-short-focus laser projection system.
  • FIG. 10 is a schematic structural diagram of a laser projection system provided by 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 embodiment.
  • the laser projection device 001 can be electrically connected to the actuators in the projection screen 000 .
  • the laser projection device 001 when the laser projection device 001 is working, the laser projection device 001 can not only emit light obliquely upward, so that the laser projection device 001 can project a picture to the projection screen 000;
  • the sound electrical signal enables the projection screen 000 to emit sound while displaying the projection picture.

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Abstract

一种投影屏幕及激光投影***，包括光学幕片（100）；发声板（200），发声板（200）具有两个发声区（200a，200b）；条状的第一支撑部（300），第一支撑部（300）与发声板（200）远离光学幕片（100）的一面粘接，第一支撑部（300）位于两个发声区（200a，200b）之间；以及，与发声板（200）远离光学幕片（100）的一面连接的两组发声部（400），两组发声部（400）分别位于两个发声区（200a，200b）内。

Description

投影屏幕及激光投影***
相关申请的交叉引用
本申请要求在2020年08月24日提交的，申请号为202010857246.6的中国专利申请的优先权，它们的全部内容通过引用结合在本申请中。
技术领域
本申请涉及激光投影技术领域，特别涉及一种投影屏幕及激光投影***。
背景技术
激光投影***包括投影屏幕和激光投影***，激光投影设备能够在投影屏幕上投射画面，以实现视频播放等功能。
发声屏幕是一种能够发出声音的屏幕，其可以在显示画面的同时，作为音响发出声音，用户体验较好。
发声屏幕一般包括显示功能层、辅助发声层以及多个扬声器，其中显示功能层用于实现显示功能，扬声器用于在电力的驱动下，带动辅助发声层振动，进而发出声音。
发明内容
一方面，本申请的一些实施例提供了一种投影屏幕，包括：光学幕片；与所述光学幕片连接的发声板，所述发声板具有两个发声区；条状的第一支撑部，所述第一支撑部与所述发声板远离光学幕片的一面粘接，所述第一支撑部位于所述两个发声区之间；以及，与所述发声板远离光学幕片的一面连接的两组发声部，所述两组发声部分别位于所述两个发声区内。
另一方面，本申请的一些实施例提供了一种激光投影***，包括：激光投影设备，以及上述的投影屏幕，所述激光设备与所述投影屏幕中的激励器电连接。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本 申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是相关技术提供的一种投影屏幕的俯视图；
图2是图1示出的投影屏幕的***图；
图3是本申请实施例提供的一种投影屏幕的俯视图；
图4是图3示出的投影屏幕的***图；
图5是本申请实施例提供的另一种投影屏幕的俯视图；
图6是本申请实施例提供的又一种投影屏幕的俯视图；
图7是本申请实施例提供的再一种投影屏幕的***图；
图8是本申请实施例提供的一种发声板处于多模态时的效果图；
图9是本申请实施例提供的一种发声部的***图；
图10是本申请实施例提供的一种激光投影***的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
目前，可以将激光投影***中的发声组件集成在投影屏幕。例如，请参考图1，图1是相关技术提供的一种投影屏幕的俯视图，图2是图1示出的投影屏幕的***图。投影屏幕包括：发声屏01、框体02、盖板03、激励器04和减震框05。发声屏01包括：光学幕片011和发声板012，以及位于二者之间的幕片粘接层013。减震框05环绕在发声屏01的周围，且与发声屏01的边缘连接。框体02与减震框05连接。盖板03呈条状，且盖板03的两端均与框体02连接。激励器04位于发声屏01与盖板03之间，且激励器04与发声屏01中的发声板012远离光学幕片011的一面连接。激励器04可以带动发声屏01中的发声板012振动以发出声音。
如图1所示，投影屏幕中的盖板03的个数为两个，投影屏幕还包括：位于两个盖板03之间的支撑板06，支撑板06可以对发声屏100起到支撑作用，防止该发声屏01出现中央塌陷的现象。投影屏幕中的每个盖板03与发声板012之间的激励器04的个数可以为一个或多个。
当投影屏幕需要发声时，投影屏幕中的多个激励器04需要同时进行工作，会同时带动发声板012产生物理位移及形变，从而导致该投影屏幕所发出的 声音的立体声效差。
示例性的，假设该投影屏幕中的激励器04包括：激励器04a和激励器04b。在发声板012所在区域中，与激励器04a连接的区域为第一区域012a，与激励器04b连接的区域为第二区域012b。当投影屏幕需要发声时，激励器04a和激励器04b需要同时进行工作，第一区域012a产生物理位移及形变，与第二区域012b产生物理位移及形变之间会相互干扰，最终会导致该投影屏幕所发出的声音的立体声效差。
图3是本申请实施例提供的一种投影屏幕的俯视图，图4是图3示出的投影屏幕的***图。参考图3和图4，投影屏幕000包括：光学幕片100、发声板200、第一支撑部300和两组发声部400。
光学幕片100与发声板200连接。在本申请中，将光学幕片100与发声板200连接后形成的结构称为发声屏。
发声板200具有两个发声区，分别为：第一发声区200a和第二发声区200b。
第一支撑部300呈条状，且第一支撑部300与发声板200远离光学幕片100的一面粘接。第一支撑部300可以位于两个发声区之间，例如，第一支撑部300位于第一发声区200a和第二发声区200b之间。
两组发声部400均与发声板200远离光学幕片100的一面连接。两组发声部400分别位于两个发声区内。例如，两组发声部400中的一个位于第一发声区200a内，另一个位于第二发声区200b内。
在本申请实施例中，若投影屏幕000需要发声，则位于第一发声区200a内的一组发声部400，以及位于第二发声区200b内的另一组发声部400同时进行工作。第一发声区200a产生物理位移及形变，使得第一发声区200a发声，第二发声区200a也产生物理位移及形变，使得第二发声区200b也可以发声。
并且，由于第一支撑部300与发声板200远离光学幕片100的一面粘接，且该第一支撑部300位于第一发声区200a与第二发声区200b之间，因此，发声板200与第一支撑部300接触的至少部分区域并不会产生物理位移及形变。这样，可以降低该第一发声区200a产生的物理位移及形变，以及第二发声区200b产生的物理位移及形变之间相互干扰的概率，从而降低了第一发声区200a所发出的声音与第二发声区200b所发出的声音之间出现相互干扰的概率，有效的提高了该投影屏幕所发出的声音的立体声效。
综上所述，本申请实施例提供的投影屏幕，包括：光学幕片、发声板、 第一支撑部和两组发声部。当该两组发声部进行工作时，发声板内的第一发声区和第二发声区均可以产生物理位移及形变，使得该第一发声区和第二发声区均可以发出的声音。由于第一支撑部可以与发声板远离光学幕片的一面粘接，且该第一支撑部位于第一发声区和第二发声区之间，因此，该发声板与第一支撑部接触的至少部分区域并不会产生物理位移及形变。这样，降低该第一发声区产生物理位移及形变，以及第二发声区产生物理位移及形变之间会相互干扰的概率，从而降低了第一发声区所发出的声音与第二发声区所发出的声音之间出现相互干扰的概率，有效的提高了该投影屏幕所发出的声音的立体声效。
在本申请实施例中，投影屏幕000中的发声板100的结构有多种，本申请实施例以以下两种可能的实施方式为例进行示意性的说明：
在第一种可能的实施方式中，如图5所示，图5是本申请实施例提供的另一种投影屏幕的俯视图。投影屏幕000包括：一个发声板200。在这种情况下，投影屏幕000中的第一发声区200a与第二发声区200b均位于该发声板200所在区域内。当投影屏幕000包括一个发声板200时，发声板200在光学幕片100上的正投影的边界与光学幕片100靠近发声板200的一面的边界重合。
在本申请中，投影屏幕000中的第一支撑部300与发声板200远离光学幕片100的一面通过粘接层(图5中未标注)粘接。第一支撑部300在发声板200上的正投影，可以与粘接层在发声板200上的正投影重合。例如，粘接层可以为胶水、胶膜或双面胶等胶黏剂。
如此，第一支撑部300与发声板200之间是通过面粘接的方式紧固连接。当通过面粘接的方式实现第一支撑部300与发声板200之间的紧固连接时，发声板200中与第一支撑部300接触的所有的区域均不会产生物理位移及形变。进一步的降低了发声板200中的第一发声区200a所发出的声音与第二发声区200b所发出的声音之间出现相互干扰的概率，从而进一步的提高了该投影屏幕000所发出的声音的立体声效。
在本申请实施例中，投影屏幕000中的第一支撑部300在发声板200上的正投影，位于发声板200的中央区域内。如此，第一支撑部300能够将发声板200所在区域划分为面积相同的两个发声区，也即是，发声板200上的第一发声区200a的面积与第二发声区200b的面积相同。在这种情况下，第 一发声区200a所发出声音的响度与第二发声层102b所发出声音的响度近似相同，进一步的提高了该投影屏幕000所发出的声音的立体声效。
在第二种可能的实施方式中，如图6所示，图6是本申请实施例提供的又一种投影屏幕的俯视图。该投影屏幕000包括：两个发声板200。两个发声板200之间具有空隙d。在这种情况下，投影屏幕000中的第一发声区200a与第二发声区200b可以分别位于两个发声板200所在区域内。当投影屏幕000包括两个发声板200时，假设两个发声板200与光学幕片100均为矩形板状结构，则每个发声板200在光学幕片100上的正投影的三条边缘，可以与光学幕片100靠近发声板200的一面的三条边缘重合。
在本申请中，由于投影屏幕000中的两个发声板200之间具有空隙d，且两个发声区分别位于该两个发声板200所在区域内，因此，当投影屏幕000发声时，第一发声区200a产生的物理位移及形变，与第二发声区200b产生的物理位移及形变之间并不会相互干扰，避免了第一发声区200a所发出的声音与第二发声区200b所发出的声音之间出现相互干扰的概率，进而有效的提高了该投影屏幕000所发出的声音的立体声效。
示例的，该投影屏幕000中的第一支撑部300与两个发声板200远离光学幕片100的一面均通过粘接层(图6中未标注)粘接。例如，该粘接层可以为胶水、胶膜或双面胶等胶黏剂。
在本申请一些实施例中，投影屏幕000中的两个发声板200的形状和大小均相同。如此，投影屏幕000中的第一发声区200a的面积与第二发声区200b的面积相同。在这种情况下，该第一发声区200a所发出声音的响度与第二发声层102b所发出声音的响度近似相同，进一步的提高了该投影屏幕000所发出的声音的立体声效。
在一种可能的实施方式中，如图5和图6所示，投影屏幕300还可以包括：与第一支撑部300连接的条状的第二支撑部600。第二支撑部600的长度方向与该第一支撑部300的长度方向相交。例如，第二支撑部600的长度方向与第一支撑部300的长度方向垂直。需要说明的是，投影屏幕000中的第二支撑部600的个数可以为多个。示例的，第二支撑部600的个数可以为两个，两个第二支撑部600中的任一个可以与第一支撑部300的一端连接，另一个可以与第一支撑部300的另一端连接。在这种情况下，第一支撑部300与两个第二支撑部600能够组成“工”字型的支撑架。通过该“工”字型的 支撑架可以对由光学幕片100和发声板200构成的发声屏进行有效的支撑，有效的防止该发声屏在中央区域出现塌陷的现象。
在本申请的一些实施例中，由第一支撑部300与两个第二支撑部600构成的“工”字型的支撑架可以是一体结构。也即是，通过一次机械加工或磨具成型工艺可以同时形成具有该第一支撑部300与两个第二支撑部600的“工”字型的支撑架。
在本申请的一些实施例中，投影屏幕000中的第二支撑部600与发声板200远离光学幕片100的一面粘接。如此，由第一支撑部300与两个第二支撑部600能够组成“工”字型的支撑架能够更好的对由发声板200和光学幕片100组成的发声屏起到支撑作用。
示例的，第二支撑部600与发声板200远离光学幕片100的一面可以通过点胶的方式粘接。由于点胶的粘接方式可以减少对粘接剂的用量，因此采用点胶的粘接方式可以极大的降低支撑投影屏幕000的成本。为了能够将第一支撑部400和第二支撑部600紧固的粘接在发声板200上，盖板401的材料可以选用铝合金或镁合金等重量较轻且强度高的金属材料。
在相关技术中，如图1和图2所示，由于投影屏幕中的框体02需要与盖板03的两端通过螺钉固定连接，该框体02还需要与支撑板06的两端通过螺钉固定连接，为了不影响框体02与盖板03以及支撑板06之间连接的紧固性，需要保证该框体02中与盖板03连接的部分的厚度(该厚度所在方向垂直于光学幕片011所在面)较大，导致该投影屏幕的厚度较大。
在本申请实施例中，图7是本申请的一些实施例提供的再一种投影屏幕的***图，投影屏幕000还可以包括：框体500。框体500与由光学幕片100和发声板200所组成的发声屏的边缘连接。示例的，框体500的通常可以为与发声屏的形状匹配的环状的框体，如此，框体500可以环绕在发声屏的周围，且与该发声屏的边缘连接。例如，当发声屏为矩形的板状结构时，框体500为矩形环状的框体。由于第一支撑部300与第二支撑部600组成的支撑架是采用与发声板200远离光学幕片100的一面粘接的方式，来实现与发声板200的紧固的，第一支撑部300与第二支撑部600均未采用通过螺钉与该框体500紧固连接的方式，有效减小投影屏幕000的厚度，提高了投影屏幕000的美观性。
在本申请实施例中，如图7所示，投影屏幕000中的每个发声区内的一 组发声部400可以包括：至少一个发声部400。本申请的一些实施例是以每组发声部400包括一个发声部400为例进行示意说明的，在其他可能的实施方式中，投影屏幕000中两组发声部400均可以包括多个发声部400，且各组发声部400所包括的发声部400的个数可以相同，也可以不同。本申请实施例对此不做限定。
示例的，投影屏幕000中的每个发声部400包括：与发声板200远离光学幕片100的一面粘接的条状的盖板401，以及位于盖板401与投影屏幕000中的发声板200之间的激励器402。需要说明的是，每个发声部400可以包括：一个或多个激励器402，图6是以每个发声部400包括两个激励器402为例进行示意性说明的。激励器402可以分别与盖板401和发声板200远离光学幕片100的一面连接，如此，在该激励器402工作时，激励器300能够带动发声板200产生物理位移及形变，从而使得发声板200发声。
在相关技术中，如图1或图2所示，投影屏幕中的盖板03的两端通常是通过螺钉与框体02紧固连接的，如此，在激励器04工作时，该激励器04势必会带动盖板03进行机振，而处于机振状态的盖板03往往会与盖板03进行碰撞而产生杂音，该杂音会直接影响投影屏幕所发出声音的音效。
而在本申请的一些实施例中，由于投影屏幕000中的盖板401未与框体500连接，该盖板401是与发声板200通过粘接的方式紧固连接的，因此，在位于发声板200与盖板401之间的激励器402工作时，即使该激励器402会带动盖板401出现机振的现象，该激励器402也不会与框体500发生碰撞而产生杂音，有效的提高了该投影屏幕000所发出声音的音效。
在一种可能的实施方式中，如图7所示，投影屏幕000还包括：位于光学幕片100与发声板200之间的幕片粘接层700，光学幕片100通过该幕片粘接层700与发声板200粘接。在光学幕片100通过幕片粘接层700与发声板200粘接而组成发声屏后，投影屏幕000框体500与该发声屏的边缘连接。
在本申请实施例中，投影屏幕000中的盖板401与发声板200之间的多个激励器402均与激光投影设备电连接，激光投影设备可以在工作时，向每个激励器402发送声音电信号。由于每个激励器402可以与发声板200远离光学幕片100的一面固定连接，因此，每个激励器402在接收到该声音电信号后，可以基于声音电信号进行往复运动，从而可以带动发声板200整个面共同振动，使得发声板200发声，使得投影屏幕000能够在激光投影设备工 作时发出声音。
在一种可能的实施方式中，投影屏幕000中的发声板200包括：板状的铝蜂窝芯层，以及位于该铝蜂窝芯层两侧的玻璃纤维蒙皮。每个激励器402可以与该发声板200中的一个玻璃纤维蒙皮连接，而另一个玻璃纤维蒙皮需要通过幕片粘接层700与光学幕片100粘接。如图8所示，图8是本申请实施例提供的一种发声板处于多模态时的效果图，在每个激励器402工作时，由于该发声板200内存在铝蜂窝芯层，由发声板200振动产生的声音在发声板200的整个面上处于多模态，使得发声板200可以以面为整体多个位置共同振动，从而使得该发声板200的正面均可以发声。发声板102的厚度范围可以为2毫米至10毫米。例如，发声板102的厚度可以为5毫米。
该投影屏幕000中的光学幕片100内具有微镜反射结构，微镜反射结构可以将激光投影设备射出的光线以特定的方向进行反射。如此，可以保证经过微镜反射结构反射后的光线能够最大限度的到达用户的眼睛，使得用户可以观看到更加清晰的画面。示例的，光学幕片100可以包括：圆形菲涅尔光学膜片、黑栅幕或白塑幕等。光学幕片100的厚度范围可以为0.5毫米至1.7毫米。例如，光学幕片100的厚度可以为1.0毫米。
在一种可能的实施方式中，投影屏幕000中的幕片粘接层700为胶水胶膜或双面胶等胶黏剂。幕片粘接层104的厚度范围可以为0.1毫米至1毫米。例如，幕片粘接层104的厚度可以为0.5毫米。
在一种可能的实施方式中，投影屏幕000中的光学幕片100和发声板200组成的发声屏呈矩形板状，投影屏幕000中的框体500可以包括：与发声屏的四个边缘一一对应的四个条状结构。四个条状结构首尾顺次连接，以组成与发声屏的形状匹配的矩形框体。在一种可能的实施方式中，任意两个相邻的条状结构可以通过L型的连接件连接，连接件与条状结构通过螺钉紧固连接。该投影屏幕000中的框体500的材料可以为铝合金或镁合金等金属材料。在本申请中，每个条状结构具有卡接槽，且每个条状结构可以与发声屏中对应的边缘卡接，以实现框体500与该发声屏之间的连接。
在本申请的一些实施例中，在投影屏幕000中的发声部400内的激励器402工作时，激励器402能够带动发声板200产生物理位移及形变，从而使得发声板200发声。由于发声板200与光学幕片100之间是粘接的，因此，当发声板200产生物理位移及形变时，发声板200会向光学幕片100施加作用 力。当光学幕片100受到发声板200的作用力时，光学幕片100与框体500接触部分极易受到损坏。
为此，可以在框体500与光学幕片100接触的位置处设置减震结构(图5中未标注)，通过该减震结构可以降低光学幕片100与框体500接触的部分受到发声板200的作用力时出现损坏的概率。在一种可能的实施方式中，该减震结构的材料可以为减震泡棉或减震橡胶等。
在本申请的一些实施例中，如图9所示，图9是本申请的一些实施例提供的一种发声部的***图。发声部400内的盖板401靠近发声板200的一面具有与激励器402配合的凹槽401a，激励器402可以位于凹槽401a内。由于激励器402位于盖板401上设置的凹槽401a内，且盖板401与发声板200远离光学幕片100的一面粘接的，因此，有效的消除了激励器402自身的厚度对投影屏幕000的厚度的影响，从而进一步的降低该投影屏幕000的厚度，提高了该投影屏幕000的美观性。
在本申请实施例中，发声部400中的激励器402与盖板401之间需要紧固连接。其中，激励器402与盖板401之间的紧固连接有多种可能的实施方式，本申请的一些实施例以以下两种可能的实施方式为例进行示意性的说明：
在一种可能的实施方式中，发声部400中的激励器402的厚度与盖板401中的凹槽401a的深度相同，如此，在盖板401与发声板200远离光学幕片100的一面粘接后，通过盖板401中的凹槽401a可以将位于其内的激励器402压紧，以实现发声部400中的激励器402与盖板401之间的紧固连接。
在一种可能的实施方式中，发声部400中的激励器402可以与盖板401中的凹槽401a通过减震粘接层(图9中未画出)粘接，以实现发声部400中的激励器402可以与盖板401之间的紧固连接。
示例的，当激励器402与盖板401中对应的凹槽401a通过减震粘接层粘接时，可以防止激励器402与盖板401之间的硬性接触，减小了激励器402在工作过程中对盖板401施加的作用下，从而降低了盖板401在激励器402工作过程中出现的机振现象的概率，并且，可以降低盖板401在出现机振现象时所发出的杂音的音量，提高了该投影屏幕000所发出的声音的音效。
对于减震粘接层的结构，本申请实施例以以下两种情况为例进行示意性的说明：
第一种情况，减震粘接层可以包括：减震泡棉，以及位于该减震泡棉两 侧的双面胶。减震泡棉与激励器402通过双面胶粘接，且减震泡棉与盖板401中对应的凹槽401a的底面也可以通过双面胶粘接。激励器402与盖板401中对应的凹槽401a的底面之间存在间隙，减震泡棉可以填充在该间隙内。减震泡棉的厚度的范围可以为0.2毫米至0.5毫米。
第二种情况，减震粘接层可以包括：改性橡胶材料层。改性橡胶材料层的厚度可以为2毫米至2.5毫米。改性橡胶材料层的柔韧性较好且粘接性较好。该改性橡胶材料层还具有耐高温和耐低温的特性。例如，改性橡胶材料层在高温情况下不易流滴，在低温情况下不易硬化和脱落，改性橡胶材料层能够满足激光投影***中的投影屏幕000的使用环境。同时，改性橡胶材料层可以保证一定的弹性，在激励器402往复运动的过程中能够更好的起到缓冲作用。
在本申请中，投影屏幕000中的盖板401与发声板200之间的多个激励器400，均可以与该发声板200远离光学幕片100的一面通过粘接的方式固定连接。由于投影屏幕000中的盖板401与发声板200远离光学幕片100的一面也是通过粘接的方式连接的，因此，每个激励器400与发声板200远离光学幕片100的一面，以及盖板401与发声板200远离光学幕片100的一面均可以通过粘接层(图9中未画出)连接。
在本申请的一些实施例中，粘接层位于投影屏幕000中的盖板401与发声板200之间，且粘接层在发声板200上的正投影，可以与盖板401在发声板200上的正投影重合。如此，盖板401与发声板200之间是通过面粘接的方式连接的。当采用面粘接的方式连接盖板401与发声板200时，可以更牢固的将盖板401粘接在发声板200上，有效的提高了二者之间连接的牢固性。
示例的，位于投影屏幕000中的盖板401与发声板200之间的粘接层可以为胶水胶膜或双面胶等胶黏剂。为了能够将盖板401紧固的粘接在发声板200上，该盖板401的材料可以选用铝合金或镁合金等重量较轻且强度高的金属材料。
在相关技术中，如图1和图2所示，投影屏幕中的框体02具有卡槽02a。该投影屏幕还可以包括：悬挂支架07。该悬挂支架07具有与卡槽02a卡接的卡勾07a，通过该卡勾07a与卡槽02a之间的卡接，可以实现悬挂支架07与框体02之间的可拆卸连接。该悬挂支架07还具有紧固螺钉07b，通过该紧固螺钉07b可以将该悬挂支架07固定在墙壁上。如此，在悬挂支架07固定在 墙壁上后，当该悬挂支架07通过卡勾07a与框体02上的卡槽02a卡接时，可以实现将发声屏01、盖板03以及激励器04组成的结构悬挂在墙壁上，从而实现了将投影屏幕固定在墙壁上。
但是，在相关技术中，在投影屏幕悬挂在墙壁上之后，投影屏幕的显示面(也即光学幕片011所在面)与墙壁之间会存在一个微小的夹角，导致该投影屏幕与墙壁之间会存在一定的空隙。如此，当该投影屏幕中的激励器04工作时，该激励器04会带动投影屏幕整体出现振动现象，导致该投影屏幕与墙壁之间会出现反复的碰撞现象，在投影屏幕与墙壁之间出现碰撞时会出现杂音，该杂音可能会与投影屏幕所发出的声音混合在一起，导致投影屏幕所发出的声音的音效较差。
在本申请的一些实施例中，如图5、图6和图7所示，投影屏幕000中的第一支撑部300远离发声板200的一面，以及第二支撑部600远离发声板200的一面均具有多个减震凸起800。示例的，多个减震凸起800可以均匀的分布在第一支撑部300远离发声板200的一面，以及第二支撑部600远离发声板200的一面上。减震凸起800的材料可以包括：橡胶、硅胶和泡棉等减震材料。
在投影屏幕000悬挂在墙壁上后，多个减震凸起800填充在投影屏幕000与墙壁之间的空隙内。如此，在发声部400中的激励器402工作时，激励器402会带动投影屏幕000整体出现振动现象，通过投影屏幕000与墙壁之间的多个减震凸起800，可以避免投影屏幕000与墙壁之间出现反复碰撞的现象，并且削弱了投影屏幕000整体振动的振幅，从而避免了在碰撞的过程中产生的杂音与投影屏幕000所发出的声音混合在一起的现象，有效的提高了投影屏幕000所发出的声音的音效。
示例的，如图7所示，投影屏幕000还包括与第二支撑部600远离发声板200的一面连接的至少两个悬挂架900。每个悬挂架900具有紧固螺钉901，通过紧固螺钉901可以将悬挂架900固定在墙壁上。如此，可以实现将光学幕片100、发声板200、第一支撑部300、发声部400和第二支撑部600固定在墙壁上，也即是，实现了将投影屏幕000固定在墙壁上。
在一种可能的实施例中，如图5、图6和图7所示，投影屏幕000中的第二支撑部600远离发声板200的一面具有与至少两个悬挂架900一一对应的至少两个第一卡接件601，每个悬挂架900还具有与对应的第一卡接件601连接的第二卡接件902。通过第一卡接件601与第二卡接件902之间的连接，可 以实现悬挂架900与第二支撑部600之间的连接。
在一种可能的实施方式中，如图7所示，第二支撑部600上的第一卡接件601为具有第一卡槽601a的卡接件，悬挂架900上的第二卡接件902为具有与该第一卡槽601a的形状匹配的第一凸起902a的卡接件。第一凸起902a位于该第一卡槽601a内，以实现第一卡接件601与第二卡接件902之间的连接。
在一种可能的实施方式中，第二支撑部600上的第一卡接件601具有第二凸起的卡接件，悬挂架900上的第二卡接件902具有与该第二凸起的形状匹配的第二卡槽的卡接件。第二凸起位于该第二卡槽内，以实现第一卡接件601与第二卡接件902之间的连接。
在一种可能的实施方式中，如图7所示，为了降低在投影屏幕000中的激励器300工作的过程中，第二支撑部600与悬挂架900之间的连接位置处(也即是，第一卡接件601与第二卡接件902之间相交的位置处)出现的振动现象的概率，每个悬挂架900还可以包括：在第二支撑部600中的第一卡接件601与第二卡接件902之间设置的悬挂减震层903。在这种情况下，悬挂架900中的第二卡接件902与悬挂减震层903连接后，再与第二支撑部600中的第一卡接件601连接。如此，在投影屏幕000中的激励器402工作的过程中，通过该悬挂减震层903可以降低第二支撑部600与悬挂架900之间的连接位置处出现的振动现象的概率，进而有效的提高了第二支撑部600悬挂在墙壁上的稳定性，同时也降低了第二支撑部600与悬挂架900之间的连接位置处出现振动现象时所发出的杂音，进一步的提高了该投影屏幕000所发出的声音的音效。
示例的，该悬挂减震层903的材料为丁基橡胶或聚氨酯泡沫等阻尼材料。当第二支撑部600上的第一卡接件601为具有第一卡槽601a的卡接件，悬挂架900上的第二卡接件902为具有与第一凸起902a的卡接件时，悬挂架900上的悬挂减震层903具有与该第一凸起902a的形状匹配的卡槽(图7中未标注)，通过卡槽、第一凸起902a与第一卡槽601a之间的配合关系，可以实现在第一卡接件601与第二卡接件902之间设置悬挂减震层903。
在本申请的一些实施例中，投影屏幕000中的悬挂架900的个数可以为4个，也即是，该投影屏幕000包括4个悬挂架900。4个悬挂架900可以均匀的分布在投影屏幕000中的两个第二支撑部600远离发声板200的一面上。 例如，4个悬挂架900中的其中两个悬挂架900可以与一个第二支撑部600连接，另两个挂支架400可以与另一个第二支撑部600连接。如此，在投影屏幕000通过悬挂架900悬挂在墙壁上后，投影屏幕000的显示面(也即是光学幕片100所在面)与墙壁之间并不会存在夹角，也即是，投影屏幕000的显示面与墙壁平行设置，有效的提高了投影屏幕000悬挂在墙壁上的稳定性。
需要说明的是，每个悬挂架900的结构，以及悬挂架900与第二支撑部600之间的连接方式可以参考上述实施例中的对应内容。本申请实施例在此不再赘述。
综上所述，本申请实施例提供的投影屏幕，包括：光学幕片、发声板、第一支撑部和两组发声部。当该两组发声部进行工作时，发声板内的第一发声区和第二发声区均可以产生物理位移及形变，使得该第一发声区和第二发声区均可以发出的声音。由于第一支撑部可以与发声板远离光学幕片的一面粘接，且该第一支撑部位于第一发声区和第二发声区之间，因此，发声板与第一支撑部接触的至少部分区域并不会产生物理位移及形变。如此，降低第一发声区产生的物理位移及形变，以及第二发声区产生的物理位移及形变之间相互干扰的概率，从而降低了第一发声区所发出的声音与第二发声区所发出的声音之间出现相互干扰的概率，有效的提高了该投影屏幕所发出的声音的立体声效。
本申请实施例还提供了一种激光投影***，在一种可能的实施方式中，激光投影***为超短焦激光投影***。示例的，如图10所示，图10是本申请实施例提供的一种激光投影***的结构示意图。激光投影***可以包括：投影屏幕000和激光投影设备001。投影屏幕000可以为上述实施例中的投影屏幕。该激光投影设备001可以与投影屏幕000中的激励器电连接。
如此，在激光投影设备001工作时，激光投影设备001不仅可以斜向上的发射光线，使得激光投影设备001可以向投影屏幕000投射画面；激光投影设备001还可以向投影屏幕000中的激励器发送声音电信号，使得投影屏幕000可以在显示投射画面的同时进行发声。
在本申请中，术语“第一”和“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“多个”指两个或两个以上，除非另有明确的限定。
以上所述仅为本申请的可选的实施例，并不用以限制本申请，凡在本申 请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种投影屏幕，包括：
    光学幕片；
    与所述光学幕片连接的发声板，所述发声板具有两个发声区；
    条状的第一支撑部，所述第一支撑部与所述发声板远离光学幕片的一面粘接，所述第一支撑部位于所述两个发声区之间；
    以及，与所述发声板远离光学幕片的一面连接的两组发声部，所述两组发声部分别位于所述两个发声区内。
  2. 根据权利要求1所述的投影屏幕，其中，所述投影屏幕包括：一个所述发声板，所述两个发声区均位于所述发声板所在区域内。
  3. 根据权利要求2所述的投影屏幕，其中，所述第一支撑部与所述发声板远离所述光学幕片的一面通过粘接层粘接，所述第一支撑部在所述发声板上的正投影，与所述第一粘接层在所述发声板的正投影重合。
  4. 根据权利要求2所述的投影屏幕，其中，所述第一支撑部在所述发声板的正投影位于所述发声板的中央区域内。
  5. 根据权利要求1所述的投影屏幕，其中，所述投影屏幕包括：两个所述发声板，两个所述发声板之间具有空隙，所述两个发声区分别位于两个所述发声板所在区域内。
  6. 根据权利要求2所述的投影屏幕，其中，所述第一支撑部与两个所述发声板远离所述光学幕片的一面均通过粘接层粘接，且两个所述发声板的形状和大小均相同。
  7. 根据权利要求1所述的投影屏幕，其中，每组发声部包括：至少一个发声部，每个所述发声部包括：与所述发声板远离光学幕片的一面粘接的条状的盖板，以及位于所述盖板与所述发声板之间的激励器，所述激励器分别与所述盖板和所述发声板远离所述光学幕片的一面连接。
  8. 根据权利要求1所述的投影屏幕，其中，所述投影屏幕还包括：与所述第一支撑部连接的条状的第二支撑部，所述第二支撑部与所述发声板远离光学幕片的一面粘接，所述第二支撑部的长度方向与所述第一支撑部的长度方向相交。
  9. 根据权利要求8所述的投影屏幕，其中，所述第一支撑部远离所述发声板的一面，以及所述第二支撑部远离所述发声板的一面均具有多个减震凸起。
  10. 一种激光投影***，其中，包括：激光投影设备，以及权利要求1至9任一所述的投影屏幕，所述激光设备与所述投影屏幕中的发声部电连接。
PCT/CN2021/114134 2020-08-24 2021-08-23 投影屏幕及激光投影*** WO2022042497A1 (zh)

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