CN213399186U

CN213399186U - Projection screen and projection system can curl

Info

Publication number: CN213399186U
Application number: CN202022760491.3U
Authority: CN
Inventors: 钟强; 王超; 冯宇
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-06-08
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a projection screen and projection system can curl relates to projection screen technical field for the unable problem of curling of projection screen among the solution prior art. The projection system comprises a projector and a curlable projection screen, wherein the curlable projection screen comprises a surface layer, a flexible supporting layer, a Fresnel lens layer and a reflecting layer which are sequentially stacked, and the flexible supporting layer is used for supporting the surface layer and the Fresnel lens layer; the haze value of the surface layer far away from the Fresnel lens layer is more than or equal to 20 percent, and/or the Fresnel lens layer is provided with diffusion particles.

Description

Projection screen and projection system can curl

Technical Field

The utility model relates to a projection screen technical field especially relates to a projection screen and projection system can curl.

Background

In the field of projection display, especially in the field of ultra-short-focus laser projection display, in order to achieve better brightness and display effect, a projector is generally used in combination with a projection screen having a fresnel microstructure.

As shown in fig. 1, the projection screen includes a surface layer 101, a colored layer 102, a diffusion layer 103, a fresnel lens layer 104 and a reflection layer 105, which are sequentially disposed, the surface layer 101 is used to protect the projection screen, the colored layer 102 is used to improve the contrast of the projection screen, the diffusion layer 103 has diffusion particles 106 distributed therein, the diffusion particles 106 are typically PMMA (Polymethyl Methacrylate), the diffusion layer 103 is used to diffuse light entering the projection screen along different directions, the fresnel lens layer 104 is provided with a reflection surface 107 on a side away from the diffusion layer 103, the reflection layer 105 is coated on the reflection surface 107, and the material of the reflection layer 105 may be typically aluminum, silver or a combination of the aluminum and the silver.

As shown in fig. 1, light emitted by the projector 108 is incident to the coloring layer 102 through the surface layer 101, and then enters the diffusion layer 103, the light is diffused by the diffusion particles 106 in the diffusion layer 103 in all directions when passing through the diffusion layer 103, the light diffused by the diffusion layer 103 enters the fresnel lens layer 104, the light entering the fresnel lens layer 104 enters the diffusion layer 103 again after being reflected by the reflection layer 105, the diffusion layer 103 diffuses the light out along all directions, and the final light exits out of the projection screen, and the range covered by the final exiting light is the range of viewing angles at which the viewer can see images in the projection screen, and the running route of the light emitted by the projector 108 is as follows: a1-a2-a 3. Ambient light can also be incident on the projection screen and finally exit after being reflected by the reflective layer 105 of the fresnel lens layer 104, and the travel route of the ambient light is b1-b2-b 3.

In the existing projection screen, the diffusion layer is mostly made of MS (methyl methacrylate-styrene copolymer), and the MS has high hardness, so that the projection screen is difficult to curl, and the projection screen which cannot curl has high limitation in the transportation and use processes.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a projection screen which can be curled, which is used for solving the problem that the projection screen in the prior art can not be curled; an object of the present invention is to provide a projection system using the above-mentioned projection screen that can be curled.

In order to achieve the above object, the utility model provides a projection screen that can curl adopts following technical scheme:

in some embodiments of the present application, the rollable projection screen includes a surface layer, a flexible support layer, a fresnel lens layer, and a reflective layer, which are sequentially stacked, wherein the flexible support layer is used for supporting the surface layer and the fresnel lens layer; the haze value of the surface layer far away from the Fresnel lens layer is more than or equal to 20 percent, and/or the Fresnel lens layer is provided with diffusion particles.

In the rollable projection screen, the flexible supporting layer is used as an assembly foundation and can support the surface layer and the Fresnel lens layer; by setting the haze value of the surface layer far away from the Fresnel lens layer to be more than or equal to 20%, when light of the projector irradiates the curlable projection screen, the surface layer can diffuse the light entering the curlable projection screen, and/or by setting diffusion particles in the Fresnel lens layer, the diffusion particles can diffuse the light entering the Fresnel lens layer, so that the viewing angle of the curlable projection screen is improved; the surface layer is flexible and can be made of flexible materials such as UV glue (UV is the abbreviation of Ultra-Violet ray, namely ultraviolet ray, the UV glue is also called photosensitive glue, ultraviolet curing glue, shadowless glue, UV light curing glue and the like) or thermosetting glue and the like, the flexible supporting layer is flexible and can be made of flexible materials such as PET (Polyethylene terephthalate) and the like, the Fresnel lens layer is flexible and can be made of flexible materials such as UV glue and the like, the reflecting layer is a very thin metal layer coated on the Fresnel lens layer and can be bent, and after the reflecting layer is coated on the Fresnel lens layer, the Fresnel lens layer and the reflecting layer are still flexible as a whole, so that the whole rollable projection screen has flexibility; this projection screen that can curl makes superficial layer, flexible supporting layer and fresnel lens layer through using flexible material for whole projection screen can realize curling, and projection screen that can curl all is very convenient in transportation, installation and use.

In some embodiments of the present application, a dark dye is distributed in the surface layer. Set up like this, can improve this projection screen's that can curl contrast, need not set up the dyed layer again specially simultaneously, can reduce this projection screen's that can curl number of piles and thickness, more do benefit to this projection screen's that can curl curling.

In some embodiments of the present application, diffusion particles are disposed in the surface layer. By the arrangement, light rays entering the curlable projection screen can be diffused by the diffusion particles in the surface layer, so that the diffusion uniformity and diffusion amplitude of the light rays are further improved, and the viewing angle and viewing effect of the curlable projection screen are improved.

In some embodiments of the present application, the material of the flexible support layer is PET. The deformation temperature and the long-term usable temperature of PET are higher, the service life of the rollable projection screen can be prolonged by using the PET, in addition, the price of the PET is lower, and the cost of the rollable projection screen can be reduced.

In some embodiments of the present application, the thickness of the flexible support layer ranges from 0.15mm to 0.25 mm. The flexible supporting layer within the thickness range can meet the supporting strength, further guarantee the flatness of the rollable projection screen during use, and improve the rollable performance of the rollable projection screen.

In some embodiments of the present application, the thickness of the surface layer ranges from 15 μm to 30 μm. The surface layer within the thickness range can meet the strength of the curlable projection screen when the curlable projection screen is unfolded, further ensure the flatness of the curlable projection screen when the curlable projection screen is used, and improve the curling performance of the curlable projection screen.

In some embodiments of the present application, the reflective layer is made of aluminum. The aluminum has good reflection effect and low cost.

In some embodiments of the present application, the thickness of the reflective layer ranges from 10 μm to 20 μm. The reflective layer with the thickness range can meet the reflecting effect of the reflective layer, and the rollable performance of the rollable projection screen is not influenced.

In some embodiments of the present application, the thickness of the Fresnel lens layer ranges from 20 μm to 100 μm. The Fresnel lens layer within the thickness range can meet the strength of the Fresnel lens layer during expansion, so that the flatness of the rollable projection screen during use is guaranteed, and the rollable performance of the rollable projection screen is not affected.

The utility model provides a projection system adopts following technical scheme:

in some embodiments of the present application, the projection system includes a projector and a rollable projection screen, where the rollable projection screen includes a surface layer, a flexible support layer, a fresnel lens layer, and a reflective layer, which are sequentially stacked, and the flexible support layer is used to support the surface layer and the fresnel lens layer; the haze value of the surface layer far away from the Fresnel lens layer is more than or equal to 20 percent, and/or the Fresnel lens layer is provided with diffusion particles.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a projection screen in the background art;

fig. 2 is a schematic cross-sectional structure diagram of an embodiment of a rollable projection screen provided by the present invention.

In the drawings: 101-surface layer, 102-coloured layer, 103-diffusing layer, 104-fresnel lens layer, 105-reflecting layer, 106-diffusing particles, 107-reflecting surface, 108-projector; 1-a surface layer, 2-a flexible supporting layer, 3-a Fresnel lens layer and 4-a reflecting layer. 5-reflecting surface, 6-projector.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The utility model provides a projection screen's that can curl embodiment:

in the field of ultra-short-focus laser projection display, in order to achieve better brightness and display effect, a projection screen comprising a Fresnel lens layer is generally selected and matched with a projector for use, and the projection screen has the characteristics of high gain, small visual angle and certain ambient light resistance. In the prior art, a projection screen including a fresnel lens layer is generally provided with a special diffusion layer, diffusion particles are distributed in the diffusion layer, a base material of the diffusion layer is generally MS, and the diffusion layer is used for diffusing light entering the projection screen. Because of the stiffness of the MS, prior art projection screens are not rollable and have significant limitations during transport and use.

In view of the above, the utility model provides a projection screen can curl to in projection screen's transportation and use, the utility model provides a projection screen can curl is applicable to the projector that emits monochromatic laser. For convenience of explaining the structure of the rollable projection screen, the present embodiment is described in a state where the rollable projection screen is unfolded for use, and it is defined that the rollable projection screen is unfolded along a vertical plane when the rollable projection screen is unfolded for use, and a direction in which a viewer looks at the rollable projection screen is a front view direction.

As shown in fig. 2, the rollable projection screen includes a surface layer 1, a flexible support layer 2, a fresnel lens layer 3, and a reflection layer 4, which are sequentially stacked in the front view direction.

Two sides of flexible supporting layer 2 in the direction of looking forward are the plane to make flexible supporting layer 2 as the equipment basis of whole curlable projection screen, be used for supporting superficial layer 1 and fresnel lens layer 3, the material of flexible supporting layer 2 is PET, and PET is flexible better, makes flexible supporting layer 2 curlable. Of course, in other embodiments, the material of the flexible support layer 2 may also be SBC (styrene Block Copolymers, styrene thermoplastic elastomers, also called styrene Block Copolymers), which is also flexible and can also achieve the curling of the flexible support layer 2, and may also be used.

In order to make the flexible supporting layer 2 have a certain supporting strength and not affect the rollable performance thereof, the thickness of the flexible supporting layer 2 in the embodiment is set to be within a range of 0.15mm to 0.25mm, and may be selected to be 0.18mm, 0.2mm, 0.22mm, or the like.

The fresnel lens layer 3 is made of UV glue cured, and the fresnel lens layer 3 can be curled because the UV glue has elasticity. As shown in fig. 2, a side of the fresnel lens layer 3 away from the flexible supporting layer 2 is provided with a plurality of reflecting surfaces 5 arranged in an up-down direction, each reflecting surface 5 is a plane inclined from top to bottom along an orthographic direction, an included angle θ between each reflecting surface 5 and a horizontal plane is gradually increased from top to bottom, and the included angle θ is within a range of 5 degrees to 85 degrees.

In order to make the fresnel lens layer 3 have a certain supporting strength and not affect the rollable performance, the thickness of the fresnel lens layer 3 in the embodiment is within a range of 20 μm to 100 μm, for example, 20 μm, 50 μm, 70 μm, 85 μm, 100 μm, etc. can be selected and used.

When the Fresnel lens layer 3 is manufactured, UV glue is coated on the side face, far away from the surface layer 1, of the flexible supporting layer 2, then the Fresnel lens layer 3 is stamped by using a special die, so that the Fresnel lens layer 3 is formed, then the UV glue is cured by using a UV light source lamp, and then the Fresnel lens layer 3 is manufactured by demolding; after the Fresnel lens layer 3 is molded, a reflecting layer 4 is coated on each reflecting surface 5, and the reflecting layer 4 is made of aluminum; of course, in other embodiments, the material of the reflective layer 4 may also be silver, or a combination of silver and aluminum may also be used.

In general, the reflective layer 4 is a thin metal layer coated on each reflective surface 5, so that the reflective layer 4 can be bent, specifically, the thickness of the reflective layer 4 in this embodiment is in the range of 10 μm to 20 μm, and may be 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, or the like; after the reflective layer 4 is coated on the fresnel lens layer 3, the fresnel lens layer 3 and the reflective layer 4 are still flexible to some extent and can be curled.

The surface layer 1 is used for protecting the rollable projection screen and preventing the rollable projection screen from being scratched to reduce the using effect; the surface layer 1 is made of UV glue cured, and the surface layer 1 can be curled because the UV glue has elasticity.

When preparation superficial layer 1, glue the coating with the UV and keep away from fresnel lens layer 3 on the side at flexible supporting layer 2, then carry out the impression to superficial layer 1 with special mould for superficial layer 1 shaping, reuse UV light source lamp solidifies UV glues, then the preparation of superficial layer 1 can be accomplished in the drawing of patterns. Of course, in other embodiments, the surface layer 1 may be formed on the flexible supporting layer 2 by thermally curing or UV-curing the hardened paint, and the same may be used.

The thickness of the surface layer 1 in this embodiment is in the range of 15 μm to 30 μm, and may be 18 μm, 20 μm, 25 μm, or the like.

As shown in fig. 2, in order to diffuse the light emitted from the projector 6 after entering the rollable projection screen, the haze value of the surface layer 1 away from the fresnel lens layer 3 is set to be 20% or more, and thus, the light emitted from the projector 6 can be prevented from generating specular reflection at the surface of the surface layer 1 away from the fresnel lens layer 3. The haze value of the surface layer 1 away from the fresnel lens layer 3 is set to be 20% or more, and can be realized by at least the following three ways: 1) performing AG treatment (i.e., anti-glare treatment) on the surface of the surface layer 1 away from the fresnel lens layer 3; 2) embossing a pattern engaging path on the surface of the surface layer 1 far away from the Fresnel lens layer 3 through a mold; 3) the surface of the surface layer 1 remote from the fresnel lens layer 3 is coated with diffusing particles.

In order to improve the contrast of the rollable projection screen, a dark dye is also added to the surface layer 1 in this embodiment.

Because the surface layer 1, the flexible supporting layer 2 and the Fresnel lens layer 3 are all flexible and can be curled, and the reflecting layer 4 can also be bent, the whole curled projection screen can be curled integrally.

As shown in fig. 2, the dotted lines and arrows in the figure indicate the path of the light emitted from the projector 6 through the rollable projection screen to the viewer, and the light emitted from the projector 6 sequentially passes through the surface layer 1 and the flexible support layer 2, then enters the fresnel lens layer 3, is reflected by the reflection layer 4, and then sequentially passes through the fresnel lens layer 3, the flexible support layer 2 and the surface layer 1 to illuminate the viewer. When light passes through the surface layer 1, the haze value of the surface layer 1 away from the fresnel lens layer 3 is 20% or more, and therefore, the light is diffused.

In the above embodiment, the rollable projection screen achieves light diffusion by setting the haze value of the surface layer away from the fresnel lens layer to be 20% or more. In other embodiments, the rollable projection screen may also implement the light diffusion in other manners, for example, on the basis that the haze value of the surface layer away from the fresnel lens layer is greater than or equal to 20%, the diffusing particles may be disposed in the surface layer and/or the fresnel lens layer, and the diffusing particles may be PMMA, which may also implement the light diffusion, and make the light diffusion amplitude larger and the light diffusion more uniform, which may also be used; of course, the haze value of the surface layer away from the fresnel lens layer may also be set to be less than 20%, and on this basis, the diffusion particles may be provided in the surface layer and/or in the fresnel lens layer, and the diffusion particles may be PMMA, so that the diffusion of light may also be achieved.

In the above embodiments, the thickness of the flexible supporting layer ranges from 0.15mm to 0.25 mm. In other embodiments, the thickness of the flexible support layer may be less than 0.15mm or greater than 0.25mm, such as 0.12mm, 0.14mm, 0.3mm, 0.35mm, etc., may be used.

In the above embodiments, a dark dye is added to the surface layer to improve the contrast of the rollable projection screen. In other embodiments, dark dyes may also be added to the flexible support layer or fresnel lens layer, and may be used as well; of course, no dark dye may be added to each layer in the rollable projection screen, and the same may be used.

In the above embodiments, the thickness of the surface layer ranges from 15 μm to 30 μm. In other embodiments, the thickness of the surface layer may also be less than 15 μm or greater than 30 μm, such as may be 13 μm, 35 μm, etc., all of which may be used.

In the above embodiments, the thickness of the reflective layer ranges from 10 μm to 20 μm. In other embodiments, the thickness of the reflective layer may be less than 10 μm or greater than 30 μm, such as 8 μm, 25 μm, etc., may be used.

In the above embodiments, the thickness of the fresnel lens layer ranges from 20 μm to 100 μm. In other embodiments, the Fresnel lens layer may be less than 20 μm or greater than 100 μm, such as 15 μm, 110 μm, etc., and may be used.

The utility model also provides a projection system, projection system are including the projection screen and the projector that can curl, and the structure of the projection screen that should curl is the same with the structure of the projection screen that can curl in above-mentioned each embodiment, and it is no longer repeated here.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A curlable projection screen is characterized by comprising a surface layer, a flexible supporting layer, a Fresnel lens layer and a reflecting layer which are sequentially stacked, wherein the flexible supporting layer is used for supporting the surface layer and the Fresnel lens layer; the haze value of the surface layer far away from the Fresnel lens layer is more than or equal to 20%, and/or diffusion particles are arranged in the Fresnel lens layer.

2. The rollable projection screen of claim 1, wherein a dark dye is distributed in the surface layer.

3. A rollable projection screen according to claim 1 or 2, wherein the surface layer is provided with diffusing particles therein.

4. A rollable projection screen according to claim 1 or 2, wherein the material of the flexible support layer is PET.

5. A rollable projection screen according to claim 1 or 2, wherein the thickness of the flexible support layer ranges from 0.15mm to 0.25 mm.

6. A rollable projection screen according to claim 1 or 2, wherein the thickness of the surface layer ranges from 15 μ ι η to 30 μ ι η.

7. A rollable projection screen according to claim 1 or 2, wherein the reflective layer is made of aluminum.

8. A rollable projection screen according to claim 1 or 2, wherein the thickness of the reflective layer has a value in the range of 10 μ ι η -20 μ ι η.

9. A rollable projection screen according to claim 1 or 2, wherein the thickness of the fresnel lens layer ranges from 20 μ ι η to 100 μ ι η.

10. A projection system comprising a projector and a rollable projection screen according to any one of claims 1-9.