CN113960872B - Projection screen and laser projection system - Google Patents
Projection screen and laser projection system Download PDFInfo
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- CN113960872B CN113960872B CN202010698718.8A CN202010698718A CN113960872B CN 113960872 B CN113960872 B CN 113960872B CN 202010698718 A CN202010698718 A CN 202010698718A CN 113960872 B CN113960872 B CN 113960872B
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- 230000003287 optical effect Effects 0.000 claims abstract description 141
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 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
- 239000000243 solution Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005034 decoration Methods 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
- 230000004048 modification Effects 0.000 description 1
- 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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- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Projection Apparatus (AREA)
Abstract
The application discloses a projection screen and a laser projection system, and belongs to the technical field of laser projection. The projection screen includes: rigid support plate, optical 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 application relates to the field of laser projection technology, and in particular, to a projection screen and a laser projection system.
Background
The laser projection system comprises a projection screen and a laser projection device, and the laser projection device can project pictures on the projection screen so as to realize functions of video playing and the like.
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 width of the frame of the projection screen currently manufactured by the optical screen sheet is 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 rigid support plate having a support surface;
an optical curtain sheet connected with the supporting surface of the rigid supporting plate;
and a frame connected to the rigid support plate, the frame comprising: 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 face of the rigid support plate remote from the optical curtain sheet, the second sheet-like structure covering a side face of the rigid support plate;
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 technical scheme provided by the embodiment of the application has the beneficial effects that:
the projection screen includes: rigid support plate, optical 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 required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a projection screen according to the related art;
FIG. 2 is an exploded view of a projection screen according to 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 according to 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 by 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 according to 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 a strip structure according to an embodiment of the present application;
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 structural diagram of a laser projection system according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a projection screen according to the related art. The projection screen 00 may include: a rigid support plate 01, a frame 02 and an optical curtain sheet 03.
The optical curtain 03 may be adhered to the support surface of the rigid support plate 01.
The frame 02 can be used to wrap the rigid support plate 01, which can decorate the edges of the rigid support plate 01, thereby improving the overall aesthetics of the projection screen 00. The frame 02 is usually obtained by splicing a plurality of segments.
For example, the housing 02 may include: a bent structure 021 and a wrapped structure 022. The wrapping structure 022 may wrap the side of the rigid support plate 01, and the wrapping structure 022 wraps the side of the rigid support plate 01 and also wraps the edge area of the optical curtain sheet 03. The bending structure 021 includes: the first sheet-like structure 021a and the second sheet-like structure 021b are connected to each other. The first sheet-like structure 021a may be fixedly connected to a side of the rigid support plate 01 away from the optical curtain sheet 03, for example, the first sheet-like structure 021a may be fixedly connected to a side of the rigid support plate 01 away from the optical curtain sheet 03 by a screw 04. The second sheet-like structure 021b may be abutted to the wrapping structure 022, and after the first sheet-like structure 021a is fixedly connected with the rigid support plate 01, the wrapping structure 022 may be fixed on the side surface of the rigid support plate 01 by the second sheet-like structure 021b so as to realize decoration of the edge of the rigid support plate 01.
In the related art, since the wrapping structure 022 wraps 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 and the rigid support plate 01 is large, and the thickness of the projection screen 00 is also large. In addition, the edge area of the optical sheet 03 wrapped by the wrapping structure 022 cannot display the image projected by the laser projection device, so that the area of the effective display area of the optical sheet 03 is smaller, and the utilization rate of the projection screen 00 to the optical sheet 03 is lower. 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:
a rigid support plate 100, an optical curtain sheet 200, and a frame 300.
The rigid support plate 100 has a support surface a, and the optical curtain sheet 200 may be coupled to the support surface a of the rigid support plate 100.
The frame 300 may be coupled with the rigid support plate 100, and the frame 300 may include: a first sheet structure 301 and a second sheet structure 302 connected to each other. The first sheet structure 301 may cover at least an edge region of the side B of the rigid support plate 100 remote from the optical curtain sheet 200. The second sheet structure 302 may cover the side C of the rigid support plate 100. The edge of the rigid support plate 100 can be decorated by the frame 300. The support surface a of the rigid support plate 100 and the surface B of the rigid support plate 100 away from the optical curtain sheet 200 are two opposite surfaces of the rigid support plate 100, and the side surface C of the rigid support plate 100 is located between the two opposite surfaces.
The end surface of the second sheet structure 302, which is far from the end of the first sheet structure 301, does not protrude from the display surface D of the optical curtain sheet 200. The display surface D of the optical curtain sheet 200 is a surface of the optical curtain sheet 200 away from the rigid support plate 100. The display surface D of the optical sheet 200 and the surface of the optical sheet 200 contacting the supporting surface a are two opposite surfaces of the optical sheet 200, and the optical sheet 200 further has a side surface located between the two opposite surfaces.
In the embodiment of the present application, since the end surface of the end of the second sheet structure 302, which is far from the first sheet structure 301, in the frame 300 does not protrude from the display surface D of the optical screen 200, the frame 300 does not wrap the edge area of the optical screen 200, 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 200 can also display the picture projected by the laser projection device, so that any position in the display surface D of the optical screen 200 can display the picture, thereby effectively increasing the area of the effective display area in the optical screen 200, and further effectively increasing the utilization rate of the projection screen 000 to the optical screen 200. Wherein the utilization of the optical curtain sheet 200 by the projection screen 000 can reach 100%.
In summary, the projection screen provided by the present application includes: rigid support plate, optical 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.
In the related art, as shown in fig. 1, when the optical sheet 03 is made of a hard material, the expansion and contraction phenomenon of the optical sheet 03 occurs when the temperature is changed, and in order to avoid the problem that the optical sheet 03 interferes with the wrapping structure 022 after the expansion, the optical sheet 03 is deformed, an expansion gap is usually reserved between the optical sheet 03 and the wrapping structure 022. 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 of the optical curtain 03 wrapped by the wrapping structure 022 is t1; the sum of the thickness of the wrapping structure 022 in the direction perpendicular to the optical curtain sheet 03 and the thickness of the second sheet-shaped structure 021b in the bending structure 021 is t2; the expansion gap between the optical curtain 03 and the wrapping structure 022 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 rigid supporting plate 01 and the surface of the first sheet-like structure 021a far away from the rigid supporting plate 01 is h1; the distance between the side of the optical sheet 02 remote from the rigid support plate 01 and the side of the sheet-like structure adjacent to the optical sheet 02 within the wrapping structure 022 is h2. Then, the thickness h of the projection screen 00 satisfies: h=h1+h2.
In order to reduce the width of the frame of the projection screen 000 and the thickness of the projection screen 000 in the embodiment of the present application, the structure of the frame 300 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 by an embodiment of the present application. The frame 300 in the projection screen 000 may be disposed around the optical screen 200, and the front projection of the end surface of the end of the second sheet structure 302 of the frame 300 remote from the first sheet structure 301 on the support surface a of the rigid support plate 100 is offset from the front projection of the optical screen 200 on the support surface a of the rigid support plate 100.
In the embodiment of the present application, when the front projection of the end surface of the end of the second sheet-like structure 302, which is far from the first sheet-like structure 301, in the frame 300 is offset from the front projection of the optical curtain sheet 200 on the supporting surface a of the rigid supporting plate 100, the positional relationship between the second sheet-like structure 302 and the optical curtain sheet 200 in the frame 300 is various, and the following four cases are respectively schematically illustrated in the embodiment of the present application.
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 302 in the frame 300, which is far from one end of the first sheet structure 301, is coplanar with the display surface D of the optical curtain sheet 200.
In the embodiment of the present application, when the frame 300 in the projection screen 000 is disposed around the optical screen 200 and the end surface of the second sheet structure 302 in the frame 300, which is far from the end of the first sheet structure 301, is coplanar with the display surface D of the optical screen 200, if the environmental temperature of the environment where the projection screen 000 is located changes, the optical screen 200 may expand, and the expanded optical screen 200 may interfere with the second sheet structure 302 in the frame 300 in a direction parallel to the support surface a of the rigid support plate 100.
In order to prevent the optical curtain sheet 200 from interfering with the second sheet-like structure 302 in the frame 300 in a direction parallel to the supporting surface a of the rigid support plate 100 after being expanded due to a change in temperature, which causes a problem of deformation of the optical curtain sheet 200, as shown in fig. 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 curtain sheet 200 and the second sheet-like structure 302 in the frame 300 in a direction parallel to the supporting surface a of the rigid support plate 100. The first gap T2 can prevent the optical curtain sheet 200 from contacting the second sheet structure 302 in a direction parallel to the supporting surface a even if the optical curtain sheet 200 expands, so that the problem that the optical curtain sheet 200 is damaged or the internal stress is too concentrated is effectively avoided.
Illustratively, assuming that the width of the frame of the projection screen 000 is T, the thickness of the second sheet-like structure 302 in the frame 300 is T1, and the first gap between the optical sheet 200 and the second sheet-like structure 302 in the frame 300 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 302 in the housing 300 at the end remote from the first sheet-like structure 301 and the surface of the first sheet-like structure 301 remote from the second sheet-like structure 302 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 according to 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 200 is located between the support surface a of the rigid support plate 100 and the end surface of the end of the second sheet structure 302 of the frame 300 remote from the first sheet structure 301. For example, the distance between the display surface D of the optical screen 200 and the end surface of the second sheet structure 302 in the frame 300 at the end distant from the first sheet structure 301 may be H'.
In this case, since the end surface of the second sheet-like structure 302 in the frame 300, which is far from the end of the first sheet-like structure 301, is further outward than the display surface D of the optical sheet 200, the second sheet-like structure 302 can protect the optical sheet 200 to some extent, and the probability of the optical sheet 200 being worn is effectively reduced.
In the embodiment of the present application, a first gap exists between the optical curtain sheet 200 and the second sheet structure 302 in the frame 300 in a direction parallel to the supporting surface a of the rigid supporting plate 100. It should be noted that, the function of the first gap may refer to the corresponding content in the first case, and the embodiment of the present application is not described herein again.
Illustratively, assuming that the width of the frame of the projection screen 000 is T, the thickness of the second sheet-like structure 302 in the frame 300 is T1, and the first gap between the optical sheet 200 and the second sheet-like structure 302 in the frame 300 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 302 in the housing 300 at the end remote from the first sheet-like structure 301 and the surface of the first sheet-like structure 301 remote from the second sheet-like structure 302 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 according to 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 302 in the frame 300, which is far from one end of the first sheet structure 301, is located between the display surface D of the optical screen 200 and the supporting surface a of the rigid supporting plate 100. For example, the distance between the display surface D of the optical screen 200 and the end surface of the second sheet-like structure 302 in the housing 300 at the end distant from the first sheet-like structure 301 may be H2.
In this case, since the display surface D of the optical screen 200 is further outside than the end surface of the second sheet structure 302 in the frame 300, which is far from the end of the first sheet structure 301, the optical screen 200 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 200 and the second sheet structure 302 in the frame 300 in a direction parallel to the supporting surface a of the rigid supporting plate 100. It should be noted that, the function of the first gap may refer to the corresponding content in the first case, and the embodiment of the present application is not described herein again.
Illustratively, assuming that the width of the frame of the projection screen 000 is T, the thickness of the second sheet-like structure 302 in the frame 300 is T1, and the first gap between the optical sheet 200 and the second sheet-like structure 302 in the frame 300 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 302 in the housing 300 at the end far from the first sheet structure 301 and the surface of the first sheet structure 301 at the end far from the second sheet structure 302 is H1, and the distance between the display surface D of the optical screen 200 and the end surface of the second sheet structure 302 in the housing 300 at the end far from the first sheet structure 301 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 according to 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 302 in the frame 300, which is remote from the end of the first sheet-like structure 301, is coplanar with the support surface a of the rigid support plate 100.
In this case, since the display surface D of the optical screen 200 is further outside than the end surface of the second sheet structure 302 in the frame 300, which is far from the end of the first sheet structure 301, the optical screen 200 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 302 in the frame 300, which is far from the end of the first sheet structure 301, is coplanar with the supporting surface a of the rigid support plate 100, even if the optical curtain sheet 200 expands, it does not contact the second sheet structure 302 in the direction parallel to the supporting surface a, and therefore, there is no need to reserve the first gap between the optical curtain sheet 200 and the second sheet structure 302 in the frame 300. 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-like structure 302 in the frame 300 is T1. Then, the width T of the frame of the projection screen 000 satisfies: t=t1. 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 302 in the frame 300 at the end far from the first sheet structure 301 and the surface of the first sheet structure 301 at the end far from the second sheet structure 302 is H1, and the distance between the display surface D of the optical screen 200 and the end surface of the second sheet structure 302 in the frame 300 at the end far from the first sheet structure 301 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 200 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 200 are 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 302 in the frame 300 in the projection screen 000 is far from the end of the first sheet-like structure 301, and faces to the surface of the optical curtain sheet 200 contacting the supporting surface a of the rigid supporting plate 100, and the orthographic projection of the optical curtain sheet 200 on the supporting surface a of the rigid supporting plate 100 covers the orthographic projection of the end surface of the end of the second sheet-like structure 302 far from the first sheet-like structure 301 on the supporting surface a.
In this embodiment, when the optical curtain sheet 200 is projected on the supporting surface a of the rigid support plate 100, and the end surface of the second sheet structure 302, which is far from the first sheet structure 301, 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 sheet 200 may expand, and the expanded optical curtain sheet 200 may interfere with the second sheet structure 302 in the frame 300 in a direction perpendicular to the supporting surface a of the rigid support plate 100.
In order to prevent the problem that the optical sheet 200 is deformed by interference with the second sheet structure 302 in the frame 300 in a direction perpendicular to the supporting surface a of the rigid support plate 100 after the expansion of the optical sheet 200 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 200 and the second sheet structure 302 in the frame 300 in a direction perpendicular to the supporting surface a of the rigid support plate 100. The second gap H3 can prevent the optical curtain sheet 200 from contacting the second sheet structure 302 in the direction perpendicular to the supporting surface a even if the optical curtain sheet 200 expands, so that the problem that the optical curtain sheet 200 is damaged or the internal stress is too concentrated is effectively avoided.
In this case, a side of the second sheet structure 302 in the frame 300 remote from the rigid support plate 100 is coplanar with the side of the optical curtain sheet 200, or a side of the second sheet structure 302 in the frame 300 remote from the rigid support plate 100 is located between the side of the optical curtain sheet 200 and the side of the rigid support plate 100. 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 302 in the housing 300, which is far from the end of the first sheet structure 301, and the surface of the first sheet structure 301, which is far from the second sheet structure 302, is H1, the second gap between the optical screen 200 and the second sheet structure 302 in the housing 300 is H3, and the thickness of the optical screen 200 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 related art, as shown in fig. 1, the frame 02 is formed by splicing the bending structure 021 and the wrapping structure 022, but when a plurality of sections of materials are spliced, poor problems such as a section difference and a flash seam tend to exist at the splicing position, which can affect the aesthetic property of the projection screen 00.
In the embodiment of the present application, as shown in fig. 17, fig. 17 is a schematic structural diagram of a frame provided in the embodiment of the present application. The frame 300 has a plurality of strip structures 300a, any two adjacent strip structures 300a are fixedly connected, and the plurality of strip structures 300a 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 300a are each constituted by a first sheet-like structure 301 and a second sheet-like structure 302, and the first sheet-like structure 301 and the second sheet-like structure 302 are also integral structures. Thus, the frame 300 is not spliced among multiple sections of materials, so that the poor problems of section difference, flash seam and the like of the frame 300 can be avoided, and the aesthetic property of the projection screen 000 is effectively improved.
In one implementation, the frame 300 is formed after one-shot injection molding using a mold and through an injection molding process.
In another implementation, the frame 300 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 according to an 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 300 shown in fig. 16 can be obtained.
Alternatively, the support surface a of the rigid support plate 100 in the above embodiment has an adhesive layer to which the optical sheet 200 may be adhered to achieve connection between the optical sheet 200 and the support surface a of the rigid support layer. The adhesive layer may be, for example, an adhesive material such as double sided tape or glue.
Alternatively, the optical sheet 200 in the above embodiment may be a hard sheet or a soft sheet, and the optical sheet 200 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. Wherein the back protective layer in the optical sheet 200 needs to be connected to the supporting surface a of the rigid supporting plate 100.
Alternatively, the first sheet structure 301 in the frame 300 in the above embodiment may be fixedly connected to the side of the rigid support plate 100 away from the optical curtain sheet 200 by the fixing member 303. The fixing member 303 may be a screw, a rivet, or the like, for example.
In summary, the projection screen provided by the present application includes: rigid support plate, optical 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. 22, fig. 22 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 the present disclosure, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.
The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but is intended to cover all modifications, equivalents, alternatives, and improvements falling within the spirit and principles of the application.
Claims (5)
1. A projection screen, comprising:
a rigid support plate having a support surface;
an optical curtain sheet connected with the supporting surface of the rigid supporting plate;
and a frame connected to the rigid support plate, the frame comprising: 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 face of the rigid support plate remote from the optical curtain sheet, the second sheet-like structure covering a side face of the rigid support plate;
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 far away from the rigid supporting plate is coplanar with the side surface of the optical curtain sheet;
alternatively, a side of the second sheet-like structure remote from the rigid support plate is located between the side of the optical curtain sheet and the side of the rigid support plate.
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 supporting surface of the rigid supporting plate is provided with an adhesive layer, and the optical curtain sheet is adhered to the adhesive 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698718.8A CN113960872B (en) | 2020-07-20 | 2020-07-20 | Projection screen and laser projection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698718.8A CN113960872B (en) | 2020-07-20 | 2020-07-20 | Projection screen and laser projection system |
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| CN113960872A CN113960872A (en) | 2022-01-21 |
| CN113960872B true CN113960872B (en) | 2023-10-24 |
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| CN1385753A (en) * | 2001-05-14 | 2002-12-18 | 索尼公司 | Projector |
| CN1438538A (en) * | 2002-02-15 | 2003-08-27 | 东芝照明技术株式会社 | Projecting device and large video-frequency device |
| CN107544203A (en) * | 2017-09-30 | 2018-01-05 | 青岛海信电器股份有限公司 | Projection display screen and projection display system |
| CN207318923U (en) * | 2017-10-23 | 2018-05-04 | 广州市雄云视听设备有限公司 | A kind of fixing device of projection hard curtain |
| CN108388074A (en) * | 2018-03-19 | 2018-08-10 | 青岛海信激光显示股份有限公司 | Projection screen and optical projection system |
| CN208188574U (en) * | 2018-04-27 | 2018-12-04 | 周光全 | A kind of frame touch-control curtain |
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2020
- 2020-07-20 CN CN202010698718.8A patent/CN113960872B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385753A (en) * | 2001-05-14 | 2002-12-18 | 索尼公司 | Projector |
| CN1438538A (en) * | 2002-02-15 | 2003-08-27 | 东芝照明技术株式会社 | Projecting device and large video-frequency device |
| CN107544203A (en) * | 2017-09-30 | 2018-01-05 | 青岛海信电器股份有限公司 | Projection display screen and projection display system |
| CN207318923U (en) * | 2017-10-23 | 2018-05-04 | 广州市雄云视听设备有限公司 | A kind of fixing device of projection hard curtain |
| CN108388074A (en) * | 2018-03-19 | 2018-08-10 | 青岛海信激光显示股份有限公司 | Projection screen and optical projection system |
| CN208188574U (en) * | 2018-04-27 | 2018-12-04 | 周光全 | A kind of frame touch-control curtain |
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| Publication number | Publication date |
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| CN113960872A (en) | 2022-01-21 |
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