CN113960872A - Projection screen and laser projection system - Google Patents
Projection screen and laser projection system Download PDFInfo
- Publication number
- CN113960872A CN113960872A CN202010698718.8A CN202010698718A CN113960872A CN 113960872 A CN113960872 A CN 113960872A CN 202010698718 A CN202010698718 A CN 202010698718A CN 113960872 A CN113960872 A CN 113960872A
- Authority
- CN
- China
- Prior art keywords
- sheet
- projection screen
- optical curtain
- curtain sheet
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 145
- 239000012790 adhesive layer Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000011241 protective layer Substances 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
- 238000005034 decoration Methods 0.000 description 1
- 230000007613 environmental effect Effects 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
Images
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Projection Apparatus (AREA)
Abstract
The application discloses projection screen and laser projection system belongs to laser projection technical field. The projection screen includes: rigid support plate, optical curtain piece and frame. The end face of one end of the second sheet structure in the frame body, which is far away from the first sheet structure, does not protrude out of the display surface of the optical curtain sheet, so that the frame body can not wrap the edge area of the optical curtain sheet, the width of a frame of the projection screen is effectively reduced, and the thickness of the projection screen is reduced.
Description
Technical Field
The application relates to the technical field of laser projection, in particular to a projection screen and a laser projection system.
Background
The laser projection system comprises a projection screen and a laser projection device, wherein the laser projection device can project pictures on the projection screen to realize the functions of video playing and the like.
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 usually provided with a micromirror reflective layer inside, and the micromirror reflective layer can reflect the 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 a user to the maximum extent, so that the user can watch a clearer picture.
However, the width of the frame of the projection screen manufactured by the optical curtain sheet is large at present.
Disclosure of Invention
The embodiment of the application provides a projection screen and a laser projection system. The problem that the width of a frame of a projection screen made of an optical curtain sheet in the prior art is large can be solved, and the technical scheme is as follows:
in one aspect, a projection screen is provided, comprising:
a rigid support plate having a support surface;
the optical curtain sheet is connected with the supporting surface of the rigid supporting plate;
and a frame connected to the rigid support plate, the frame comprising: the first sheet structure and the second sheet structure are connected with each other, the first sheet structure at least covers the edge area of one surface of the rigid support plate far away from the optical curtain sheet, and the second sheet structure covers the side surface of the rigid support plate;
the end face of one end of the second sheet structure, which is far away from the first sheet structure, does not protrude out of the display surface of the optical curtain sheet.
In another aspect, a laser projection system is provided, comprising: laser projection equipment, above-mentioned projection screen.
The technical scheme provided by the embodiment of the application has the following beneficial effects:
the projection screen includes: rigid support plate, optical curtain piece and frame. The end face of one end of the second sheet structure in the frame body, which is far away from the first sheet structure, does not protrude out of the display surface of the optical curtain sheet, so that the frame body can not wrap the edge area of the optical curtain sheet, the width of a 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 the picture can be displayed at any position in the display surface far away from the optical curtain sheet, the area of an 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 in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a projection screen provided in the related art;
fig. 2 is an exploded view of 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 in embodiments 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 in an embodiment of the present application;
FIG. 15 is a partial side view of the projection screen shown in FIG. 14;
FIG. 16 is a partial cross-sectional view of the projection screen shown in FIG. 14;
fig. 17 is a schematic structural diagram of a frame provided in an embodiment of the present application;
FIG. 18 is an enlarged fragmentary view of the frame shown in FIG. 17 at position E;
fig. 19 is a schematic structural diagram of an elongated structure according to an embodiment of the present application;
fig. 20 is a partial enlarged view of the elongated structure shown in fig. 19 at position F;
fig. 21 is a schematic view of the elongated structure shown in fig. 20 after bending;
fig. 22 is a schematic structural diagram of a laser projection system according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a projection screen provided in the related art. The projection screen 00 may include: rigid support plate 01, frame 02 and optical curtain sheet 03.
The optical curtain sheet 03 may be attached to the support surface of the rigid support plate 01.
The frame body 02 can be used for wrapping the rigid support plate 01, and can play a role in decorating the edge of the rigid support plate 01, so that the overall aesthetic property of the projection screen 00 can be improved. The housing 02 is generally obtained by splicing a multi-stage structure.
For example, the frame body 02 may include: a folded structure 021 and a wrapped structure 022. This wrapping structure 022 can wrap the side of the rigid support plate 01, and this wrapping structure 022 is while wrapping the side of the rigid support plate 01, it has still wrapped the marginal area of the optical curtain sheet 03. The bending structure 021 includes: a first and a second sheet- like structure 021a, 021b connected to each other. The first sheet-like structure 021a can 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 can 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 can abut against 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 can be fixed on the side surface of the rigid support plate 01 through the second sheet-like structure 021b so as to realize the 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 curtain sheet 03, the width of the frame of the projection screen 00 formed by the optical curtain sheet 03, the frame 02 and the rigid supporting plate 01 is large, and the thickness of the projection screen 00 is also large. Moreover, the edge area of the optical curtain sheet 03 wrapped by the wrapping structure 022 cannot display the image projected by the laser projection device, which results in a small area of the effective display area in the optical curtain sheet 03 and thus results in a low utilization rate of the projection screen 00 for the optical curtain sheet 03. The utilization rate of the projection screen 00 for the optical curtain sheet 03 may be: the ratio of the area of the effective display region in the optical curtain sheet 03 to the area of the surface of the optical curtain sheet 03 away 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 disclosure, and fig. 3 is a partial cross-sectional view of the projection screen shown in fig. 2. The projection screen 000 may include:
The rigid support plate 100 has a support surface a, and the optical curtain sheet 200 can be connected to the support surface a of the rigid support plate 100.
The frame 300 may be connected to 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 away from the optical curtain sheet 200. The second sheet structure 302 may cover side C of the rigid support plate 100. The frame 300 can decorate the edge of the rigid support plate 100. The supporting surface a of the rigid supporting plate 100 and the surface B of the rigid supporting plate 100 away from the optical curtain sheet 200 are two opposite plate surfaces of the rigid supporting plate 100, and the side surface C of the rigid supporting plate 100 is located between the two opposite plate surfaces.
The end surface of the second sheet structure 302 away from the first sheet structure 301 does not protrude from the display surface D of the optical curtain sheet 200. It should be noted that the display surface D of the optical curtain sheet 200 is a surface of the optical curtain sheet 200 far from the rigid support plate 100. The display surface D of the optical curtain sheet 200 and the surface of the optical curtain sheet 200 contacting the supporting surface a are two opposite plate surfaces of the optical curtain sheet 200, and the optical curtain sheet 200 further has a side surface located between the two opposite plate surfaces.
In the embodiment of the present application, since the end surface of the second sheet structure 302 of the frame 300, which is far away from the end of the first sheet structure 301, does not protrude from the display surface D of the optical curtain sheet 200, the frame 300 does not wrap the edge area of the optical curtain sheet 200, thereby effectively reducing the width of the frame of the projection screen 000 and reducing the thickness of the projection screen 000. In addition, the edge area of the optical curtain sheet 200 may also display the image projected by the laser projection device, so that any position in the display surface D of the optical curtain sheet 200 may display the image, the area of the effective display area in the optical curtain sheet 200 is effectively increased, and the utilization rate of the projection screen 000 to the optical curtain sheet 200 may be effectively increased. The utilization rate of the projection screen 000 to the optical curtain sheet 200 can reach 100%.
To sum up, the projection screen that this application provided includes: rigid support plate, optical curtain piece and frame. The end face of one end of the second sheet structure in the frame body, which is far away from the first sheet structure, does not protrude out of the display surface of the optical curtain sheet, so that the frame body can not wrap the edge area of the optical curtain sheet, the width of a 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 the picture can be displayed at any position in the display surface far away from the optical curtain sheet, the area of an 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 curtain sheet 03 is made of a hard material, the optical curtain sheet 03 expands and contracts when the temperature changes, and in order to avoid the problem that the optical curtain sheet 03 interferes with the wrapping structure 022 after expanding, so that the optical curtain sheet 03 deforms, an expansion gap is usually reserved between the optical curtain 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 optical curtain sheet 03 wrapped by wrapping structure 022 is t 1; 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-like structure 021b in the bent structure 021 is t 2; the expansion gap between optical curtain 03 and wrap structure 022 is t 3. Then, the width t of the frame of the projection screen 00 satisfies: t is t1+ t2+ t 3.
Suppose that the thickness of the projection screen 00 is h; the distance between one surface of the optical curtain sheet 02 far away from the rigid support plate 01 and one surface of the first sheet-like structure 021a far away from the rigid support plate 01 is h 1; the side of the optical curtain sheet 02 far away from the rigid support plate 01 is in the wrapping structure 022, and the distance between the side of the sheet structure adjacent to the optical curtain sheet 02 far away from the optical curtain sheet is h 2. Then, the thickness h of the projection screen 00 satisfies: h is h1+ h 2.
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, there are various structures of the frame 300 in the projection screen 000, and the embodiment of the present application is schematically illustrated by taking the following two optional 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 this embodiment of the present application. The frame 300 in the projection screen 000 may be disposed around the optical curtain sheet 200, and an orthographic projection of an end surface of one end of the second sheet structure 302 in the frame 300, which is far away from the first sheet structure 301, on the supporting surface a of the rigid supporting plate 100 is offset from an orthographic projection of the optical curtain sheet 200 on the supporting surface a of the rigid supporting plate 100.
In the embodiment of the present application, when the orthographic projection of the end surface of the second sheet-like structure 302 at the end far from the first sheet-like structure 301 on the supporting surface a of the rigid supporting plate 100 in the frame 300 is deviated from the orthographic projection of the optical curtain sheet 200 on the supporting surface a of the rigid supporting plate 100, there are a plurality of positional relationships between the second sheet-like structure 302 and the optical curtain sheet 200 in the frame 300, and the present application embodiment is schematically described by taking the following four cases as examples.
In a first aspect, as shown in fig. 5 and 6, fig. 5 is a partial side view of a projection screen provided in another embodiment of the present application, and fig. 6 is a partial cross-sectional view of the projection screen shown in fig. 5. The end surface of the second sheet structure 302 in the frame 300, which is far away from the 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 curtain sheet 200, and the end surface of the second sheet-like structure 302 in the frame 300, which is far away from the end of the first sheet-like structure 301, is coplanar with the display surface D of the optical curtain sheet 200, if the ambient 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-like structure 302 in the frame 300 in a direction parallel to the supporting surface a of the rigid supporting plate 100.
In order to prevent the optical curtain sheet 200 from being deformed due to the interference with the second sheet-like structure 302 in the frame 300 in the direction parallel to the supporting surface a of the rigid supporting plate 100 after the optical curtain sheet 200 expands due to the temperature change, as shown in fig. 7, fig. 7 is a partial top 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 the direction parallel to the supporting surface a of the rigid supporting plate 100. Even if the optical curtain sheet 200 expands, the first gap T2 will not contact the second sheet-like structure 302 in the direction parallel to the supporting surface a, thereby effectively avoiding the problem of damage or excessive concentration of internal stress of the optical curtain sheet 200.
For example, it is assumed 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 curtain 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 of the frame 300 away from the end of the first sheet structure 301 and the surface of the first sheet structure 301 away from the second sheet 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 a 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 sectional view of the projection screen shown in fig. 8. The display surface D of the optical curtain sheet 200 is located between the supporting surface a of the rigid supporting plate 100 and the end surface of the second sheet-like structure 302 of the frame 300, which is far from the first sheet-like structure 301. For example, the distance between the display surface D of the optical curtain sheet 200 and the end surface of the second sheet structure 302 in the frame 300, which is far away 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 away from the end of the first sheet-like structure 301, is located further outside than the display surface D of the optical curtain sheet 200, the second sheet-like structure 302 can protect the optical curtain sheet 200 to a certain extent, and the probability that the optical curtain sheet 200 is 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-like 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, for the role of the first gap, reference may be made to corresponding contents in the first case, and details of the embodiment of the present application are not described herein again.
For example, it is assumed 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 curtain 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 of the frame 300 away from the end of the first sheet structure 301 and the surface of the first sheet structure 301 away from the second sheet 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 a third aspect, as shown in fig. 10 and 11, fig. 10 is a partial side view of 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 face of the second sheet-like structure 302 of the frame 300, which is far from the end of the first sheet-like structure 301, is located between the display surface D of the optical curtain sheet 200 and the supporting surface a of the rigid supporting plate 100. For example, the distance between the display surface D of the optical curtain sheet 200 and the end surface of the second sheet structure 302 in the frame 300, which is far away from the first sheet structure 301, may be H2.
In this case, since the display surface D of the optical curtain sheet 200 is located further outside than the end surface of the second sheet-like structure 302 in the frame 300, which is far away from the end of the first sheet-like structure 301, the optical curtain sheet 200 can be in a floating state, so that the projection screen 000 can perform floating display, and the display effect of the image displayed by the projection screen 000 is effectively improved.
In the embodiment of the present application, a first gap 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 supporting plate 100. It should be noted that, for the role of the first gap, reference may be made to corresponding contents in the first case, and details of the embodiment of the present application are not described herein again.
For example, it is assumed 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 curtain 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 frame 300 away from the end of the first sheet structure 301 and the surface of the first sheet structure 301 away from the second sheet structure 302 is H1, and the distance between the display surface D of the optical curtain sheet 200 and the end surface of the second sheet structure 302 in the frame 300 away from the end of 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.
In a fourth aspect, as shown in fig. 12 and 13, fig. 12 is a partial side view of a 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 face of the second sheet structure 302 in the frame 300, which is far away from the first sheet structure 301, is coplanar with the supporting face a of the rigid supporting plate 100.
In this case, since the display surface D of the optical curtain sheet 200 is located further outside than the end surface of the second sheet-like structure 302 in the frame 300, which is far away from the end of the first sheet-like structure 301, the optical curtain sheet 200 can be in a floating state, so that the projection screen 000 can perform floating display, and the display effect of the image displayed by the projection screen 000 is effectively improved.
Moreover, when the end surface of the second sheet-like structure 302 in the frame 300, which is far away from the end of the first sheet-like structure 301, is coplanar with the supporting surface a of the rigid supporting board 100, even if the optical curtain sheet 200 expands, it will not contact the second sheet-like structure 302 in the direction parallel to the supporting surface a, and therefore, the first gap may not be reserved between the optical curtain sheet 200 and the second sheet-like structure 302 in the frame 300. In this way, the width of the bezel of the projection screen 000 can be further reduced.
For example, it is assumed that the width of the frame of the projection screen 000 is T, and 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 away from the end of the first sheet structure 301 and the surface of the first sheet structure 301 away from the second sheet structure 302 is H1, and the distance between the display surface D of the optical curtain sheet 200 and the end surface of the second sheet structure 302 in the frame 300 away from the end of the first sheet structure 301 is H2 (the H2 is the thickness of the optical curtain sheet). 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.
It should be noted 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 larger than that in the related art. And, the thickness of the projection screen 000 is small relative to the related art. Wherein, the screen proportion of the projection screen 000 means: the ratio of the area of the effective display area in the optical curtain sheet 200 to the area of the front surface of the projection screen 000 (the front surface of the projection screen 000 is located on the same side as the light emitting surface D of the optical curtain sheet 200).
In a second alternative implementation manner, as shown in fig. 14 and 15, fig. 14 is a top view of another projection screen provided in 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 of the projection screen 000 is far from one end of the first sheet-like structure 301 and faces the surface of the optical curtain sheet 200 contacting with 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 second sheet-like structure 302 far from one end of the first sheet-like structure 301 on the supporting surface a.
In the embodiment of the present application, when the orthographic projection of the optical curtain sheet 200 on the supporting surface a of the rigid supporting plate 100 is performed, and the orthographic projection of the end surface of the second sheet-like structure 302 covering the end of the first sheet-like structure 301 on the supporting surface a is performed, 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-like structure 302 in the frame 300 in the direction perpendicular to the supporting surface a of the rigid supporting 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 the direction perpendicular to the supporting surface a of the rigid supporting plate 100 after the optical curtain sheet 200 expands due to the temperature change, and thus causing the problem of deformation of the optical curtain sheet 200, as shown in fig. 16, fig. 16 is a partial cross-sectional view of the projection screen shown in fig. 14, and a second gap H3 exists between the optical curtain sheet 200 and the second sheet-like structure 302 in the frame 300 in the direction perpendicular to the supporting surface a of the rigid supporting plate 100. Even if the optical curtain sheet 200 expands, the second gap H3 will not contact the second sheet-like structure 302 in the direction perpendicular to the supporting surface a, thereby effectively avoiding the problem of damage or excessive concentration of internal stress of the optical curtain sheet 200.
In this case, a surface of the second sheet-like structure 302 in the frame 300 away from the rigid support plate 100 is coplanar with a side surface of the optical curtain sheet 200, or a surface of the second sheet-like structure 302 in the frame 300 away from the rigid support plate 100 is located between the side surface of the optical curtain sheet 200 and the side surface of the rigid support plate 100. Thus, the projection screen 000 has no frame, that is, the width of the frame 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 frame 300, which is far away from the end of the first sheet structure 301, and the surface of the first sheet structure 301, which is far away from the second sheet structure 302, is H1, the second gap between the optical curtain sheet 200 and the second sheet structure 302 in the frame 300 is H3, and the thickness of the optical curtain sheet 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.
It should be noted that, in the second implementation manner, since the projection screen 000 does not have a frame, a picture can be displayed at any position on the front of the projection screen 000, so that the screen occupation ratio of the projection screen 000 is relatively large, and the screen occupation ratio of the projection screen 000 can reach 100%.
In the related art, as shown in fig. 1, the frame body 02 is formed by splicing a bent structure 021 and a wrapping structure 022, but when multiple sections of materials are spliced, poor problems such as a step difference and a flash seam are bound to exist at the splicing position, which affects 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 bar structures 300a, any two adjacent bar structures 300a are fixedly connected, and the bar 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, each of the plurality of strip-shaped structures 300a is composed of a first sheet-shaped structure 301 and a second sheet-shaped structure 302, and the first sheet-shaped structure 301 and the second sheet-shaped structure 302 are also an integral structure. Therefore, splicing among multiple sections of materials does not exist in the frame body 300, so that the problem that the frame body 300 is poor in section, has flash seams and the like can be avoided, and the attractiveness of the projection screen 000 is effectively improved.
In one implementation, the frame 300 is formed by injection molding in one step through an injection molding process using a mold.
In another implementation, the frame body 300 is formed by forming a strip structure through an extrusion process, and then performing a cutting 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 an embodiment of the present application, and the strip structure may be subjected to a notch process to form 4 notches on the strip structure, which are a notch Q1, a notch Q2, a notch Q3, and a notch Q4. Next, referring to fig. 20 and 21, fig. 20 is a partially enlarged view of the elongated structure shown in fig. 19 at a position F, fig. 21 is a schematic view of the elongated structure shown in fig. 20 after being bent, and the elongated structure can be bent along the symmetry axis L of each notch (usually, it is necessary to bend the elongated structure by 90 degrees), so that the frame 300 shown in fig. 16 can be obtained.
Optionally, the supporting surface a of the rigid supporting board 100 in the above embodiments has an adhesive layer, and the optical curtain sheet 200 may be adhered to the adhesive layer to realize connection between the optical curtain sheet 200 and the supporting surface a of the rigid supporting board. The adhesive layer may be an adhesive material such as double-sided tape or glue, for example.
Optionally, the optical curtain sheet 200 in the above embodiment may be a hard curtain sheet or a soft curtain sheet, and the optical curtain sheet 200 may include: the light-emitting layer, the light-projecting layer, the micro-mirror layer and the back protective layer are stacked, and the back protective layer is also called a light-shielding layer. The back protection layer in the optical curtain 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 surface of the rigid support plate 100 away from the optical curtain sheet 200 through the fixing member 303. For example, the fixing member 303 may be a screw or a rivet.
To sum up, the projection screen that this application provided includes: rigid support plate, optical curtain piece and frame. The end face of one end of the second sheet structure in the frame body, which is far away from the first sheet structure, does not protrude out of the display surface of the optical curtain sheet, so that the frame body can not wrap the edge area of the optical curtain sheet, the width of a 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 the picture can be displayed at any position in the display surface far away from the optical curtain sheet, the area of an 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, and the laser projection system can be an ultra-short-focus laser projection system. For example, as shown in fig. 22, fig. 22 is a schematic structural diagram of a laser projection system provided in an embodiment of the present application. The laser projection system may include: a projection screen 000 and a laser projection device 001. The projection screen 000 may be the projection screen in the above-described embodiment. The laser projection apparatus 001 may emit light obliquely upward so that the laser projection apparatus 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" means two or more unless expressly limited otherwise.
The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.
Claims (10)
1. A projection screen, comprising:
a rigid support plate having a support surface;
the optical curtain sheet is connected with the supporting surface of the rigid supporting plate;
and a frame connected to the rigid support plate, the frame comprising: the first sheet structure and the second sheet structure are connected with each other, the first sheet structure at least covers the edge area of one surface of the rigid support plate far away from the optical curtain sheet, and the second sheet structure covers the side surface of the rigid support plate;
the end face of one end of the second sheet structure, which is far away from the first sheet structure, does not protrude out of the display surface of the optical curtain sheet.
2. The projection screen of claim 1,
the frame body encircles the edge arrangement of optics curtain piece, just the second lamellar structure is kept away from the terminal surface of the one end of first lamellar structure is in orthographic projection on the holding surface, with the optics curtain piece is in orthographic projection on the holding surface staggers.
3. The projection screen of claim 2,
the end face of one end of the second sheet structure, which is far away from the first sheet structure, is coplanar with the display surface of the optical curtain sheet;
or the display surface of the optical curtain sheet is positioned between the support surface and the end surface of one end of the second sheet-shaped structure far away from the first sheet-shaped structure;
or the end face of one end of the second sheet structure, which is far away from the first sheet structure, is positioned between the supporting surface and the display surface of the optical curtain sheet;
or the end face of one end of the second sheet structure far away from the first sheet structure is coplanar with the supporting face.
4. The projection screen of claim 3,
a first gap exists between the second sheet-like structure and the optical curtain sheet in the direction parallel to the supporting surface.
5. The projection screen of claim 1,
one end, far away from the first lamellar structure, of the second lamellar structure faces to one surface, in the optical curtain sheet, in contact with the supporting surface, and the orthographic projection of the optical curtain sheet on the supporting surface covers the orthographic projection of the end face, far away from the first lamellar structure, of the second lamellar structure on the supporting surface.
6. The projection screen of claim 5,
and a second gap exists between the second sheet-shaped structure and the optical curtain sheet in the direction vertical to the supporting surface.
7. The projection screen of claim 5,
one surface of the second sheet-shaped structure, which is far away from the rigid support plate, is coplanar with the side surface of the optical curtain sheet;
or one surface of the second sheet structure, which is far away from the rigid support plate, is located between the side surface of the optical curtain sheet and the side surface of the rigid support plate.
8. The projection screen of any one of claims 1 to 7,
the frame body is provided with a plurality of strip-shaped structures, any two adjacent strip-shaped structures are fixedly connected, and the strip-shaped structures are integrated.
9. The projection screen of any one of claims 1 to 7,
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.
10. A laser projection system, comprising: a laser projection device, and a projection screen according to any one of claims 1 to 9.
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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698718.8A CN113960872B (en) | 2020-07-20 | 2020-07-20 | Projection screen and laser projection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113960872A true CN113960872A (en) | 2022-01-21 |
| CN113960872B CN113960872B (en) | 2023-10-24 |
Family
ID=79459540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010698718.8A Active CN113960872B (en) | 2020-07-20 | 2020-07-20 | Projection screen and laser projection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113960872B (en) |
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 |
-
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113960872B (en) | 2023-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102236181B (en) | Display device | |
| US8649092B2 (en) | Screen and screen unit | |
| JP2002072204A (en) | Backlight structure for liquid crystal display body | |
| US11774670B2 (en) | Display panel, method for manufacturing a display panel and display device | |
| US7295370B2 (en) | Projection television and manufacturing method thereof | |
| US20170131454A1 (en) | Backlight module and liquid crystal display device comprising the same | |
| CN108415186B (en) | Foldable liquid crystal display screen and foldable liquid crystal display | |
| US9250377B2 (en) | Light guide plate and backlight module and display module using the same | |
| WO2023005603A1 (en) | Display module and display apparatus | |
| TW201843504A (en) | Backlight module and display device | |
| US8356906B2 (en) | Screen unit and projection display apparatus | |
| JP2006126583A (en) | Device for fixing optical film | |
| JP2002162689A (en) | Large screen display device | |
| JP2007024913A (en) | Liquid crystal display | |
| US6707605B2 (en) | Fresnel lens sheet and transmission-type projection screen | |
| US6848793B2 (en) | Projector apparatus | |
| CN113960872A (en) | Projection screen and laser projection system | |
| JP2003057647A (en) | Planar illuminating device | |
| TWI578070B (en) | Display apparatus and strip-shaped lens | |
| KR102173708B1 (en) | Screen for projection and Display Device having the same | |
| CN113960871B (en) | Projection screen and laser projection system | |
| JP5650005B2 (en) | Liquid crystal display | |
| JP2003043453A (en) | Surface illuminator | |
| JP2009282435A (en) | Display | |
| JP2002023270A (en) | Screen-holding structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |