CN113960871B - Projection screen and laser projection system - Google Patents
Projection screen and laser projection system Download PDFInfo
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- CN113960871B CN113960871B CN202010698703.1A CN202010698703A CN113960871B CN 113960871 B CN113960871 B CN 113960871B CN 202010698703 A CN202010698703 A CN 202010698703A CN 113960871 B CN113960871 B CN 113960871B
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- 230000003287 optical effect Effects 0.000 claims abstract description 143
- 230000009975 flexible effect Effects 0.000 claims abstract description 99
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- 238000010586 diagram Methods 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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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
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- Overhead Projectors And Projection Screens (AREA)
Abstract
The application discloses a projection screen and laser projection system belongs to laser projection technical field. The projection screen includes: support frame, flexible bearing structure, optics curtain piece and framework. The end surface of one end of the second sheet-shaped structure, far away from the first sheet-shaped structure, of the frame body is not protruded out of the display surface of the optical curtain sheet, so that the frame body does not wrap the edge area of the optical curtain sheet, the width of the frame of the projection screen is effectively reduced, and the thickness of the projection screen is reduced.
Description
Technical Field
The present disclosure 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.
In order to improve the display effect of the picture projected by the laser projection device on the projection screen, the projection screen needs to be made of an optical curtain sheet. The optical curtain sheet is generally provided with a micromirror reflection layer inside, and the micromirror reflection layer can reflect light emitted from the laser projection device in a specific direction. Therefore, the light reflected by the micro-mirror reflecting layer can reach the eyes of the user to the maximum extent, so that the user can watch a clearer picture.
However, the frames of projection screens currently made from optical sheets are large.
Disclosure of Invention
The embodiment of the application provides a projection screen and a laser projection system. The problem of the prior art that the width of the frame of the projection screen manufactured by the optical curtain sheet is large can be solved, and the technical scheme is as follows:
in one aspect, there is provided a projection screen comprising:
a support frame;
a flexible load bearing structure connected with the support frame, the flexible load bearing structure having a support surface;
an optical curtain sheet connected with the supporting surface of the flexible bearing structure;
and a frame body connected to the support frame, the frame body including: a first sheet-like structure and a second sheet-like structure connected to each other, the first sheet-like structure covering at least an edge region of a side of the support frame remote from the flexible carrying structure, the second sheet-like structure covering a side of a component consisting of the support frame and the flexible carrying structure;
the end face of one end of the second sheet-shaped structure far away from the first sheet-shaped structure does not protrude from the display surface of the optical curtain sheet.
In another aspect, there is provided a laser projection system comprising: a laser projection device, a projection screen as described above.
The beneficial effects that technical scheme that this application embodiment provided brought are:
the projection screen includes: support frame, flexible bearing structure, optics curtain piece and framework. The end surface of one end of the second sheet-shaped structure, far away from the first sheet-shaped structure, of the frame body is not protruded out of the display surface of the optical curtain sheet, so that the frame body does not wrap the edge area of the optical curtain sheet, the width of the frame of the projection screen is effectively reduced, and the thickness of the projection screen is reduced. In addition, the edge area of the optical curtain sheet can also display the picture projected by the laser projection equipment, so that any position in the display surface far away from the optical curtain sheet can display the picture, the area of the effective display area in the optical curtain sheet is effectively increased, and the utilization rate of the projection screen to the optical curtain sheet can be effectively increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a projection screen according to the related art;
FIG. 2 is an exploded view of a projection screen provided in an embodiment of the present application;
FIG. 3 is a partial cross-sectional view of the projection screen shown in FIG. 2;
FIG. 4 is a top view of another projection screen provided by an embodiment of the present application;
FIG. 5 is a partial side view of a projection screen provided in accordance with another embodiment of the present application;
FIG. 6 is a partial cross-sectional view of the projection screen shown in FIG. 5;
FIG. 7 is a partial top view of the projection screen shown in FIG. 5;
FIG. 8 is a partial side view of another projection screen provided in accordance with another embodiment of the present application;
FIG. 9 is a partial cross-sectional view of the projection screen shown in FIG. 8;
FIG. 10 is a partial side view of yet another projection screen provided in accordance with another embodiment of the present application;
FIG. 11 is a partial cross-sectional view of the projection screen shown in FIG. 10;
FIG. 12 is a partial side view of yet another projection screen provided in accordance with another embodiment of the present application;
FIG. 13 is a partial cross-sectional view of the projection screen shown in FIG. 12;
FIG. 14 is a top view of yet another projection screen provided by an embodiment of the present application;
FIG. 15 is a partial side view of the projection screen illustrated in FIG. 14;
FIG. 16 is a partial cross-sectional view of the projection screen illustrated in FIG. 14;
fig. 17 is a schematic structural diagram of a frame provided in an embodiment of the present application;
fig. 18 is a partial enlarged view of the frame body shown in fig. 17 at a position E;
FIG. 19 is a schematic view of an elongated structure according to an embodiment of the present disclosure;
FIG. 20 is an enlarged view of a portion of the elongated structure shown in FIG. 19 at position F;
FIG. 21 is a schematic view of the elongated structure of FIG. 20 after being bent;
FIG. 22 is a schematic view of a flexible load bearing structure according to an embodiment of the present application;
FIG. 23 is a schematic view of a projection screen according to an embodiment of the present disclosure;
fig. 24 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 below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a projection screen according to the related art. The projection screen 00 may include: a support frame 01, a frame body 02, an optical curtain sheet 03 and a flexible bearing structure 04.
The optical curtain 03 may be adhered to a support surface of the flexible carrier structure 04. The flexible carrier structure 04 may be connected to the support frame 01.
The frame 02 can be used for wrapping the component formed by the supporting frame 01 and the flexible bearing structure 04, and can play a role in decorating the edge of the component formed by the supporting frame 01 and the flexible bearing structure 04, so that the overall aesthetic property of the projection screen 00 can be improved.
For example, the housing 02 may include: the first sheet-like structure 021, the second sheet-like structure 022, the third sheet-like structure 023, and the fourth sheet-like structure 024 are connected in order. The first sheet-like structure 021 may be fixedly connected to a side of the supporting frame 01 away from the optical curtain sheet 03, for example, the first sheet-like structure 021 may be fixedly connected to a side of the supporting frame 01 away from the optical curtain sheet 03 by a screw 04. The second sheet-like structure 022 is used to connect the first sheet-like structure 021 and the third sheet-like structure 023. The third sheet-like structure 023 serves to cover the sides of the component consisting of the support frame 01 and the flexible carrier structure 04. The fourth sheet-like structure 024 is for covering the edge region of the optical curtain sheet 03.
In the related art, since the fourth sheet-like structure 024 in the frame 04 covers the edge region of the optical sheet 03, the width of the frame of the projection screen 00 constituted by the optical sheet 03, the frame 02, the supporting frame 01, and the flexible supporting structure 04 is large, and the thickness of the projection screen 00 is also large. In addition, the edge area of the optical screen 03 covered by the fourth sheet structure 024 cannot display the image projected by the laser projection device, resulting in a smaller area of the effective display area of the optical screen 03, and thus, a lower utilization rate of the optical screen 03 by the projection screen 00. The utilization ratio of the projection screen 00 to the optical curtain sheet 03 may be: the ratio of the area of the effective display area in the optical sheet 03 to the area of the side of the optical sheet 03 remote from the rigid support plate 01.
Referring to fig. 2, fig. 2 is an exploded view of a projection screen according to an embodiment of the present application, and fig. 3 is a partial cross-sectional view of the projection screen shown in fig. 2. The projection screen 000 may include:
the optical curtain sheet comprises a support frame 100, a flexible bearing structure 200, an optical curtain sheet 300 and a frame 400.
The support frame 100 may be coupled to a flexible load bearing structure 200. The flexible carrier structure 200 has a support surface a, and the optical curtain 300 may be coupled to the support surface a of the flexible carrier structure 200. It should be noted that, after the flexible carrier structure 200 is connected to the supporting frame 100, the flexible carrier structure 200 may be filled in the hollow area of the supporting frame 100, so that the front surface (the surface carrying the optical curtain sheet 300) of the component formed by the supporting frame 100 and the flexible carrier structure 200 is a complete surface, so that it can effectively carry the optical curtain sheet 300.
The frame 400 may be connected to the support frame 100, and the frame 400 may include: a first sheet-like structure 401 and a second sheet-like structure 402 connected to each other. The first sheet structure 401 may cover at least an edge region of a side B of the support frame 100 remote from the optical sheet 300. The second sheet structure 402 may cover the side C of the component consisting of the support frame 100 and the flexible carrier structure 200. The front surface of the component composed of the support frame 100 and the flexible carrier structure 200 is a support surface a, the back surface is a surface B of the support frame 100 away from the optical curtain sheet 300, and a side surface C of the component is located between the front surface and the back surface. The first sheet structure 401 and the second sheet structure 402 may be directly connected to each other, or may be transferred by the third sheet structure 403, that is, the first sheet structure 401 and the second sheet structure 402 may be connected to each other by the third sheet structure 403.
The end surface of the second sheet structure 402, which is far from the end of the first sheet structure 401, does not protrude from the display surface D of the optical curtain sheet 300. It should be noted that the display surface D of the optical curtain sheet 300 is a surface of the optical curtain sheet 300 away from the flexible supporting structure 200. The display surface D of the optical curtain sheet 300 and the surface of the optical curtain sheet 300 contacting the supporting surface a are two opposite surfaces of the optical curtain sheet 300, and the optical curtain sheet 300 further has a side surface located between the two opposite surfaces.
In this embodiment of the present application, since the end surface of the end of the second sheet structure 402, which is far away from the first sheet structure 401, in the frame body 400 does not protrude from the display surface D of the optical screen 300, the frame body 400 does not wrap the edge area of the optical screen 300, so that the width of the frame of the projection screen 000 is effectively reduced, and the thickness of the projection screen 000 is reduced. In addition, the edge area of the optical screen 300 can also display the picture projected by the laser projection device, so that any position in the display surface D of the optical screen 300 can display the picture, thereby effectively increasing the area of the effective display area in the optical screen 300, and further effectively increasing the utilization rate of the projection screen 000 to the optical screen 300. Wherein the utilization of the optical curtain 300 by the projection screen 000 can reach 100%.
In summary, the projection screen provided in the present application includes: support frame, flexible bearing structure, optics curtain piece and framework. The end surface of one end of the second sheet-shaped structure, far away from the first sheet-shaped structure, of the frame body is not protruded out of the display surface of the optical curtain sheet, so that the frame body does not wrap the edge area of the optical curtain sheet, the width of the frame of the projection screen is effectively reduced, and the thickness of the projection screen is reduced. In addition, the edge area of the optical curtain sheet can also display the picture projected by the laser projection equipment, so that any position in the display surface far away from the optical curtain sheet can display the picture, the area of the effective display area in the optical curtain sheet is effectively increased, and the utilization rate of the projection screen to the optical curtain sheet can be effectively increased.
By way of example, as shown in fig. 2 and 3, the flexible load bearing structure 200 may include: a flexible carrying portion 201, and a plurality of elastic connection members 202 having one ends connected to the flexible carrying portion 201. When the connection between the flexible carrying structure 200 and the supporting frame 100 is required, the flexible carrying portion 201 may be tightened first, then the edge of the flexible carrying portion 201 is wound around the edge of the supporting frame 100, and the second end of the elastic connecting piece 202 is connected to the side of the supporting frame 100 away from the flexible carrying portion 201. For example, the support frame 100 has a rigid connector 100a, and the second end of the elastic connector 202 may be connected to the rigid connector 100a on the support frame 100. In this way, the front face of the component consisting of the support frame 100 and flexible carrier structure 200 is the complete face. It should be noted that, the elastic connection member 202 may be an extension spring, and the flexible supporting portion 201 may be pulled by the extension spring, so that the flexible supporting portion 201 may more stably support the optical curtain sheet 300.
Optionally, as shown in fig. 3, the support frame 100 has a rigid reinforcing structure 100b. By the rigid reinforcing structure 100b, after the flexible bearing structure 200 is connected with the supporting frame 100, the tensile force applied by the flexible bearing structure 200 to the supporting frame 100 can be ensured, the supporting frame 100 can not be deformed, and the stability of the flexible bearing part 201 for bearing the optical curtain sheet 300 is further improved.
Optionally, as shown in fig. 3, the supporting frame 100 further has a curtain alignment protection structure 100c located at an edge of the supporting frame 100. Through this curtain piece counterpoint protection architecture 100c, can guarantee after flexible bearing structure 200 is connected with braced frame 100, play the guard action to this flexible bearing structure 200 in braced frame 100's edge, avoid this flexible bearing structure 200 to be broken.
In the related art, as shown in fig. 1, when the optical sheet 03 is made of a hard material, the expansion and contraction of the optical sheet 03 occurs when the temperature of the optical sheet 03 changes, and in order to avoid the problem that the optical sheet 03 interferes with the third sheet structure 023 after expansion, which results in deformation of the optical sheet 03, an expansion gap is generally reserved between the optical sheet 03 and the third sheet structure 023. Thus, the width of the frame of the projection screen 00 is further increased.
For example, assume that the width of the bezel of projection screen 00 is t; the width of the area, which is shielded by the fourth sheet-like structure 024, of the optical curtain sheet 03 is t1; the thickness of the third sheet-like structure 023 is t2; the expansion gap between the optical curtain 03 and the third sheet-like structure 023 is t3. Then, the width t of the bezel of projection screen 00 satisfies: t=t1+t2+t3.
Assume that projection screen 00 has a thickness h; the distance between the surface of the optical curtain sheet 02 far away from the flexible bearing structure 04 and the surface of the first sheet-like structure 021 far away from the supporting frame 01 is h1; the distance between the side of the optical curtain sheet 02 away from the flexible carrying structure 04 and the side of the fourth sheet-like structure 024 away from the optical curtain sheet 02 is h2. Then, the thickness h of the projection screen 00 satisfies: h=h1+h2.
In the embodiment of the present application, in order to reduce the width of the frame of the projection screen 000 and the thickness of the projection screen 000, the structure of the frame 400 in the projection screen 000 is various, and the embodiment of the present application is schematically illustrated by taking the following two alternative implementation manners as examples:
in a first alternative implementation, as shown in fig. 4, fig. 4 is a top view of another projection screen provided in an embodiment of the present application. The frame 400 in the projection screen 000 may be disposed around the optical sheet 300, and the front projection of the end surface of the end of the second sheet structure 402 of the frame 400, which is far from the first sheet structure 401, on the support surface a of the flexible carrier structure 200 is offset from the front projection of the optical sheet 300 on the support surface a of the flexible carrier structure 200.
In this embodiment, when the front projection of the end surface of the end of the second sheet structure 402, which is far from the first sheet structure 401, in the frame 400 on the supporting surface a of the flexible supporting structure 200 is staggered from the front projection of the optical curtain sheet 300 on the supporting surface a of the flexible supporting structure 200, the positional relationship between the second sheet structure 402 and the optical curtain sheet 300 in the frame 400 is various, and the following four cases are respectively and schematically described in this embodiment.
In the first case, as shown in fig. 5 and 6, fig. 5 is a partial side view of a projection screen according to another embodiment of the present application, and fig. 6 is a partial cross-sectional view of the projection screen shown in fig. 5. An end surface of the second sheet structure 402 in the frame 400, which is far from one end of the first sheet structure 401, is coplanar with the display surface D of the optical curtain sheet 300.
In this embodiment, when the frame body 400 in the projection screen 000 is disposed around the optical curtain sheet 300, and the end surface of the second sheet structure 402 in the frame body 400 away from the end of the first sheet structure 401 is coplanar with the display surface D of the optical curtain sheet 300, if the environmental temperature of the environment where the projection screen 000 is located changes, the optical curtain sheet 100 and the flexible carrier structure 200 may expand, the expanded optical curtain sheet 300 may interfere with the second sheet structure 402 in the frame body 400 in a direction parallel to the support surface a of the flexible carrier structure 200, and the expanded flexible carrier structure 200 may interfere with the second sheet structure 402 in the frame body 400 in a direction parallel to the support surface a of the flexible carrier structure 200.
In order to prevent the problem that the optical sheet 300 is deformed due to interference with the second sheet structure 402 in the frame 400 in a direction parallel to the supporting surface a of the flexible supporting structure 200 after the expansion of the optical sheet 300 due to the temperature change, as shown in fig. 6 and 7, fig. 7 is a partial plan view of the projection screen shown in fig. 5, and a first gap T2 exists between the optical sheet 300 and the second sheet structure 402 in the frame 400 in a direction parallel to the supporting surface a of the flexible supporting structure 400. The first gap T2 can prevent the optical curtain sheet 300 from contacting the second sheet structure 402 in a direction parallel to the supporting surface a even if the optical curtain sheet 300 expands, so that the problem that the optical curtain sheet 300 is damaged or the stress in the optical curtain sheet is too concentrated is effectively avoided.
In order to prevent the flexible carrier structure 200 from interfering with the second sheet-like structure 402 in the frame 400 in a direction parallel to the supporting surface a of the flexible carrier structure 200 after expansion due to temperature change, a problem of low flatness of the flexible carrier structure 200 is caused, as shown in fig. 6 and 7, in that a third gap T3 exists between the flexible carrier structure 400 and the second sheet-like structure 402 in the frame 400 in a direction parallel to the supporting surface a of the flexible carrier structure 200. By this third gap T3, the flexible carrier structure 200 is not contacted with the second sheet structure 402 in the direction parallel to the supporting surface a even if the flexible carrier structure 200 is inflated, and thus, the flatness of the flexible carrier structure 200 is effectively improved. It should be noted that the first gap T2 is generally larger than the third gap T3.
Illustratively, assuming that the width of the frame of the projection screen 000 is T, the thickness of the second sheet structure 402 in the frame 400 is T1, and the first gap between the optical sheet 300 and the second sheet structure 402 in the frame 400 is T2. Then, the width T of the frame of the projection screen 000 satisfies: t=t1+t2. As such, the width of the bezel of the projection screen 000 is small relative to the width of the bezel of the projection screen in the related art.
Assuming that the thickness of the projection screen 000 is H, the distance between the end surface of the second sheet-like structure 402 in the housing 400 at the end remote from the first sheet-like structure 401 and the surface of the first sheet-like structure 401 remote from the second sheet-like structure 402 is H1. Then, the thickness H of the projection screen 000 satisfies: h=h1. As such, the thickness of the projection screen 000 is small relative to the thickness of the projection screen in the related art.
In the second case, as shown in fig. 8 and 9, fig. 8 is a partial side view of another projection screen provided in another embodiment of the present application, and fig. 9 is a partial cross-sectional view of the projection screen shown in fig. 8. The display surface D of the optical curtain sheet 300 is located between the support surface a of the flexible carrier structure 200 and an end surface of the second sheet structure 402 in the frame 400, which is far away from the end of the first sheet structure 401. For example, the distance between the display surface D of the optical screen 300 and the end surface of the second sheet structure 402 in the housing 400 at the end distant from the first sheet structure 401 may be H'.
In this case, since the end surface of the second sheet structure 402 in the frame 400, which is far from the end surface of the first sheet structure 401, is further outward than the display surface D of the optical screen 300, the second sheet structure 402 can protect the optical screen 300 to a certain extent, and the probability of the optical screen 300 being worn is effectively reduced.
In the embodiment of the present application, a first gap exists between the optical curtain sheet 300 and the second sheet-like structure 402 in the frame 400 in a direction parallel to the supporting surface a of the flexible carrier structure 200, and a third gap exists between the flexible carrier structure 400 and the second sheet-like structure 402 in the frame 400 in a direction parallel to the supporting surface a of the flexible carrier structure 200. It should be noted that, the roles of the first gap and the third gap may refer to the corresponding matters in the first case, and the embodiments of the present application are not repeated herein.
Illustratively, assuming that the width of the frame of the projection screen 000 is T, the thickness of the second sheet structure 402 in the frame 400 is T1, and the first gap between the optical sheet 300 and the second sheet structure 402 in the frame 400 is T2. Then, the width T of the frame of the projection screen 000 satisfies: t=t1+t2. As such, the width of the bezel of the projection screen 000 is small relative to the width of the bezel of the projection screen in the related art.
Assuming that the thickness of the projection screen 000 is H, the distance between the end surface of the second sheet-like structure 402 in the housing 400 at the end remote from the first sheet-like structure 401 and the surface of the first sheet-like structure 401 remote from the second sheet-like structure 402 is H1. Then, the thickness H of the projection screen 000 satisfies: h=h1. As such, the thickness of the projection screen 000 is small relative to the thickness of the projection screen in the related art.
In the third case, as shown in fig. 10 and 11, fig. 10 is a partial side view of yet another projection screen provided in another embodiment of the present application, and fig. 11 is a partial cross-sectional view of the projection screen shown in fig. 10. The end surface of the second sheet structure 402 in the frame 400, which is far from one end of the first sheet structure 401, is located between the display surface D of the optical curtain sheet 300 and the supporting surface a of the flexible carrier structure 200. For example, the distance between the display surface D of the optical curtain sheet 500 and the end surface of the second sheet structure 402 in the housing 400 at the end distant from the first sheet structure 401 may be H2.
In this case, since the display surface D of the optical screen 300 is further outside than the end surface of the second sheet structure 402 in the frame 400, which is far from the end surface of the first sheet structure 401, the optical screen 300 can be in a floating state, thereby enabling the projection screen 000 to perform floating display, and effectively improving the display effect of the screen displayed by the projection screen 000.
In the embodiment of the present application, a first gap exists between the optical curtain sheet 300 and the second sheet-like structure 402 in the frame 400 in a direction parallel to the supporting surface a of the flexible carrier structure 200. It should be noted that, the function of the first gap may refer to the corresponding content in the first case, which is not described herein.
Illustratively, assuming that the width of the frame of the projection screen 000 is T, the thickness of the second sheet structure 402 in the frame 400 is T1, and the first gap between the optical sheet 300 and the second sheet structure 402 in the frame 400 is T2. Then, the width T of the frame of the projection screen 000 satisfies: t=t1+t2. As such, the width of the bezel of the projection screen 000 is small relative to the width of the bezel of the projection screen in the related art.
Assuming that the thickness of the projection screen 000 is H, the distance between the end surface of the second sheet structure 402 in the housing 400 at the end far from the first sheet structure 401 and the surface of the first sheet structure 401 at the end far from the second sheet structure 402 is H1, and the distance between the display surface D of the optical screen 300 and the end surface of the second sheet structure 402 in the housing 400 at the end far from the first sheet structure 401 is H2. Then, the thickness H of the projection screen 000 satisfies: h=h1+h2. As such, the thickness of the projection screen 000 is small relative to the thickness of the projection screen in the related art.
Fourth, as shown in fig. 12 and 13, fig. 12 is a partial side view of still another projection screen provided in another embodiment of the present application, and fig. 13 is a partial cross-sectional view of the projection screen shown in fig. 12. An end surface of the second sheet-like structure 402 in the frame 400 remote from the end of the first sheet-like structure 401 is coplanar with the support surface a of the flexible carrier structure 200.
In this case, since the display surface D of the optical screen 300 is further outside than the end surface of the second sheet structure 402 in the frame 400, which is far from the end surface of the first sheet structure 401, the optical screen 300 can be in a floating state, thereby enabling the projection screen 000 to perform floating display, and effectively improving the display effect of the screen displayed by the projection screen 000.
Also, when the end surface of the second sheet structure 402 in the frame 400, which is far from the end of the first sheet structure 401, is coplanar with the supporting surface a of the flexible carrier structure 200, even if the optical curtain sheet 300 expands, it will not contact the second sheet structure 402 in the direction parallel to the supporting surface a, and therefore, there may be no need to reserve the first gap between the optical curtain sheet 300 and the second sheet structure 402 in the frame 400. In this way, the width of the bezel of the projection screen 000 can be further reduced.
Illustratively, assuming that the width of the bezel of the projection screen 000 is T, the thickness of the second sheet structure 402 in the frame 400 is T1; the third gap between the flexible carrier structure 400 and the second sheet-like structure 402 in the frame 400 is T3. Then, the width T of the frame of the projection screen 000 satisfies: t=t1+t3. As such, the width of the bezel of the projection screen 000 is small relative to the width of the bezel of the projection screen in the related art.
Assuming that the thickness of the projection screen 000 is H, the distance between the end surface of the second sheet structure 402 in the housing 400 at the end far from the first sheet structure 401 and the surface of the first sheet structure 401 at the end far from the second sheet structure 402 is H1, and the distance between the display surface D of the optical screen 300 and the end surface of the second sheet structure 402 in the housing 400 at the end far from the first sheet structure 401 is H2 (the H2 is the thickness of the optical screen). Then, the thickness H of the projection screen 000 satisfies: h=h1+h2. As such, the thickness of the projection screen 000 is small relative to the thickness of the projection screen in the related art.
Note that the width of the frame of the projection screen 000 in each of the above four cases is smaller than the thickness of the projection screen in the related art, and therefore, the screen occupation of the projection screen 000 is relatively large with respect to the related art. And, the thickness of the projection screen 000 is small relative to the related art. Wherein the screen duty cycle of projection screen 000 refers to: the ratio of the area of the effective display area in the optical sheet 300 to the area of the front surface in the projection screen 000 (the front surface in the projection screen 000 and the light-emitting surface D of the optical sheet 300 are located on the same side).
In a second alternative implementation, as shown in fig. 14 and 15, fig. 14 is a top view of yet another projection screen provided by an embodiment of the present application, and fig. 15 is a partial side view of the projection screen shown in fig. 14. The second sheet-like structure 402 in the frame 400 in the projection screen 000 is far from the end of the first sheet-like structure 401, and faces to the surface of the optical curtain sheet 300 contacting the supporting surface a of the flexible supporting structure 200, and the orthographic projection of the optical curtain sheet 300 on the supporting surface a of the flexible supporting structure 200 covers the orthographic projection of the end surface of the end of the second sheet-like structure 402 far from the first sheet-like structure 401 on the supporting surface a.
In this embodiment, when the optical curtain 300 is projected on the supporting surface a of the flexible supporting structure 200, and the end surface of the second sheet structure 402, which is far from the first sheet structure 401, is projected on the supporting surface a, if the environmental temperature of the environment where the projection screen 000 is located changes, the optical curtain 300 may expand, and the expanded optical curtain 300 may interfere with the second sheet structure 402 in the frame 400 in a direction perpendicular to the supporting surface a of the flexible supporting structure 200.
In order to prevent the problem that the optical sheet 300 is deformed due to interference with the second sheet structure 402 in the frame 400 in a direction perpendicular to the supporting surface a of the flexible supporting structure 200 after the expansion of the optical sheet 300 due to the change in temperature, as shown in fig. 16, fig. 16 is a partial sectional view of the projection screen shown in fig. 14, and there is a second gap H3 between the optical sheet 300 and the second sheet structure 402 in the frame 400 in a direction perpendicular to the supporting surface a of the flexible supporting structure 200. The second gap H3 can prevent the optical curtain sheet 300 from contacting the second sheet structure 402 in the direction perpendicular to the supporting surface a even if the optical curtain sheet 300 expands, so that the problem that the optical curtain sheet 300 is damaged or the stress in the optical curtain sheet is too concentrated is effectively avoided.
In this case, a side of the second sheet structure 402 in the frame 400 remote from the flexible carrier structure 200 is coplanar with the side of the optical sheet 300, or a side of the second sheet structure 402 in the frame 400 remote from the flexible carrier structure 200 is located between the side of the optical sheet 300 and the side of the flexible carrier structure 200. As such, the projection screen 000 does not have a bezel, i.e., the width of the bezel of the projection screen 000 is 0.
Assuming that the thickness of the projection screen 000 is H, the distance between the end surface of the second sheet structure 402 in the housing 400 at the end far from the first sheet structure 401 and the surface of the first sheet structure 401 at the end far from the second sheet structure 402 is H1, the second gap between the optical screen 300 and the second sheet structure 402 in the housing 400 is H3, and the thickness of the optical screen 300 is H4. Then, the thickness H of the projection screen 000 satisfies: h=h1+h3+h4. As such, the thickness of the projection screen 000 is small relative to the thickness of the projection screen in the related art.
In the second implementation manner, since the projection screen 000 has no frame, the screen can be displayed at any position on the front of the projection screen 000, so that the screen of the projection screen 000 is relatively large, and the screen ratio of the projection screen 000 can reach 100%.
In the embodiment of the present application, as illustrated in fig. 17, fig. 17 is a schematic structural diagram of a frame provided in the embodiment of the present application. The frame 400 has a plurality of strip structures 400a, any two adjacent strip structures 400a are fixedly connected, and the plurality of strip structures 400a are an integral structure. Referring to fig. 18, fig. 18 is a partial enlarged view of the frame body shown in fig. 17 at a position E, the plurality of strip-like structures 400a are each composed of a first sheet-like structure 401 and a second sheet-like structure 402, and the first sheet-like structure 401 and the second sheet-like structure 402 are also integral structures. So, there is not the concatenation between the multistage material in this framework 400, and then can avoid in the framework 400 because the concatenation between the multistage material appear poor problems such as section difference and flashing seams, the effectual aesthetic property that improves this projection screen 000.
In one implementation, the frame 400 is formed after one-shot injection molding using a mold and through an injection molding process.
In another implementation, the frame 400 is formed by forming a strip structure through an extrusion process, and then performing a notching and bending process on the strip structure. For example, referring to fig. 19, fig. 19 is a schematic structural diagram of a strip structure provided in the embodiment of the present application, the strip structure may be subjected to a notch treatment to form 4 notches on the strip structure, which are a notch Q1, a notch Q2, a notch Q3 and a notch Q4, respectively. Referring to fig. 20 and 21, fig. 20 is a partially enlarged view of the elongated structure at the position F shown in fig. 19, fig. 21 is a schematic view of the elongated structure shown in fig. 20 after being bent, and after the elongated structure is bent (typically, bent by 90 degrees) along the symmetry axis L of each notch, the frame 400 shown in fig. 16 can be obtained.
Alternatively, as shown in fig. 22, fig. 22 is a schematic structural view of a flexible carrying structure according to an embodiment of the present application. The flexible carrier 201 in the flexible carrier structure 200 may comprise: a waterproof layer 201a, a flexible support layer 201b, and an adhesive layer 201c are laminated. The optical sheet 300 may be adhered to the adhesive layer 201c. The adhesive layer 201c may be an adhesive material such as double-sided tape or glue, for example.
The flexible supporting layer 201b has a flexible property and a certain tensile strength, so that the optical curtain sheet 300 can be stretched to the greatest extent, and the flatness of the optical curtain sheet 300 is effectively improved. The waterproof layer 201 can avoid the problem that the optical curtain sheet 300 falls off from the flexible bearing structure 200 due to the moisture in the environment where the projection screen 000 is located infiltrating into the adhesive layer 201c.
Alternatively, the optical sheet 300 in the above embodiment may be a hard sheet or a soft sheet, and the optical sheet 300 may include: the light-emitting surface protective layer, the light projection layer, the micromirror layer, and the back protective layer, which are also called light shielding layer, are stacked. The back protective layer in the optical curtain 300 needs to be connected to the supporting surface a of the flexible bearing structure 200.
Optionally, referring to fig. 23, fig. 23 is a schematic structural view of a projection screen according to an embodiment of the present application. The projection screen may further include: an adapter 500 and a fastener 600. The adaptor 500 is located between the support frame 100 and the frame 400, and the adaptor 500 may be connected to the support frame 100. The fastener 600 can fasten the frame 400 to the adapter 500. In this way, a secure connection between the support frame 100 and the frame body 400 can be achieved. By way of example, the fastener 600 may be a screw.
In summary, the projection screen provided in the present application includes: support frame, flexible bearing structure, optics curtain piece and framework. The end surface of one end of the second sheet-shaped structure, far away from the first sheet-shaped structure, of the frame body is not protruded out of the display surface of the optical curtain sheet, so that the frame body does not wrap the edge area of the optical curtain sheet, the width of the frame of the projection screen is effectively reduced, and the thickness of the projection screen is reduced. In addition, the edge area of the optical curtain sheet can also display the picture projected by the laser projection equipment, so that any position in the display surface far away from the optical curtain sheet can display the picture, the area of the effective display area in the optical curtain sheet is effectively increased, and the utilization rate of the projection screen to the optical curtain sheet can be effectively increased.
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. 24, fig. 24 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 emit light obliquely upward so that the laser projection device 001 may project a picture to the projection screen 000.
In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.
The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.
Claims (5)
1. A projection screen, comprising:
a support frame;
a flexible load bearing structure connected with the support frame, the flexible load bearing structure having a support surface;
an optical curtain sheet connected with the supporting surface of the flexible bearing structure;
and a frame body connected to the support frame, the frame body including: a first sheet-like structure and a second sheet-like structure connected to each other, the first sheet-like structure covering at least an edge region of a side of the support frame remote from the flexible carrying structure, the second sheet-like structure covering a side of a component consisting of the support frame and the flexible carrying structure;
wherein, the end surface of one end of the second sheet-shaped structure far away from the first sheet-shaped structure does not protrude from the display surface of the optical curtain sheet;
the end surface of the second sheet-shaped structure, which is far away from the first sheet-shaped structure, faces to the surface, which is contacted with the supporting surface, of the optical curtain sheet, and the orthographic projection of the optical curtain sheet on the supporting surface covers the orthographic projection of the end surface of the second sheet-shaped structure, which is far away from the first sheet-shaped structure, on the supporting surface;
a second gap exists between the second sheet-like structure and the optical curtain sheet in a direction perpendicular to the supporting surface.
2. The projection screen of claim 1 wherein the projection screen is configured to display the image of the object,
one surface of the second sheet-shaped structure, which is far away from the flexible bearing structure, is coplanar with the side surface of the optical curtain sheet;
alternatively, a side of the second sheet-like structure remote from the flexible carrier structure is located between the side of the optical curtain sheet and the side of the flexible carrier structure.
3. Projection screen according to claim 1 or 2, characterized in that,
the frame body is provided with a plurality of strip-shaped structures, any two adjacent strip-shaped structures are fixedly connected, and the plurality of strip-shaped structures are integrated.
4. Projection screen according to claim 1 or 2, characterized in that,
the flexible load bearing structure comprises: the laminated waterproof layer, the flexible supporting layer and the bonding layer are arranged, and the optical curtain sheet is bonded with the bonding layer.
5. A laser projection system, comprising: a laser projection device, and a projection screen as claimed in any one of claims 1 to 4.
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|---|---|---|---|
| CN202010698703.1A CN113960871B (en) | 2020-07-20 | 2020-07-20 | Projection screen and laser projection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010698703.1A CN113960871B (en) | 2020-07-20 | 2020-07-20 | Projection screen and laser projection system |
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| CN113960871A CN113960871A (en) | 2022-01-21 |
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| JP4329852B2 (en) * | 2007-07-11 | 2009-09-09 | セイコーエプソン株式会社 | Polarization conversion unit, polarization conversion device, and projector |
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| JPH06294998A (en) * | 1993-04-08 | 1994-10-21 | Hitachi Ltd | Multivision |
| JPH0815773A (en) * | 1994-06-27 | 1996-01-19 | Hitachi Ltd | Projection type display device |
| US6574040B1 (en) * | 1998-12-22 | 2003-06-03 | Evansconsoles Inc. | Method and apparatus for supporting one or more seamless rear projector screens |
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| CN113960871A (en) | 2022-01-21 |
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