CN218601673U - Transmissive screen - Google Patents

Abstract

The application proposes a transmissive screen comprising: the nano-metal reflective coating comprises a first transparent substrate, a first diffusion layer, a nano-metal reflective layer, a second diffusion layer, a third diffusion layer and a second transparent substrate. The first diffusion layer is arranged on the surface of the first transparent substrate and is provided with a concave-convex microstructure; the nano metal reflecting layer is arranged on the surface of the concave-convex microstructure far away from the transparent substrate, and the reflectivity of the nano metal reflecting layer is 10-25%; the second diffusion layer is arranged on the surface of the nano metal reflecting layer far away from the first diffusion layer; the third diffusion layer is arranged on the surface of the second diffusion layer far away from the nano metal reflecting layer; and the second transparent substrate is arranged on the surface of the third diffusion layer far away from the second diffusion layer. This application is owing to be provided with the second diffusion layer, and projection light is dispersed by the second diffusion layer, and dispersed state's projection light is difficult for taking place the total reflection in the third diffusion layer, has reduced because ghost image, the light scheduling problem of dazzling that the total reflection caused.

Description

Transmissive screen

Technical Field

The application relates to the technical field of screens, in particular to a transmissive screen.

Background

In the transparent display technology of the front projection system, namely, when the projection system is used, the projection picture display screen also transmits light from the back of the screen. Can bring better presence, and is one of the important development trends in the future. As in the automotive industry, transparent display technology can be displayed on automotive glass to aid driving; in the building industry, transparent displays can be displayed on windows, the sense of reality is enhanced, and users can enjoy various real and virtual contents through smart windows. The transparent display screen provided by the prior art generally comprises a nano metal reflecting layer arranged in the screen, and when projection light is reflected by the nano metal reflecting layer, the problem of total reflection possibly occurs in other layers of the screen.

Disclosure of Invention

The embodiment of the application provides a transmissive screen to improve the technical problem.

The embodiment of the present application provides a transmissive screen, including: the light-emitting diode comprises a first transparent substrate and a first diffusion layer, wherein the first diffusion layer is arranged on the surface of the first transparent substrate and is provided with a concave-convex microstructure; the nano metal reflecting layer is arranged on the surface, far away from the transparent substrate, of the concave-convex microstructure, the reflectivity of the nano metal reflecting layer is 10% -25%, and the thickness range of the nano metal reflecting layer is 12nm-20nm. The second diffusion layer is arranged on the surface, far away from the first diffusion layer, of the nano metal reflection layer and comprises diffusion particles with the particle size range of 50-200 nm and a matrix, and the thickness range of the second diffusion layer is 0.01-5 microns. The third diffusion layer is arranged on the surface, far away from the nano metal reflecting layer, of the second diffusion layer; and the second transparent substrate is arranged on the surface of the third diffusion layer far away from the second diffusion layer.

In some embodiments, the nano-diffusion particles are selected from at least one of inorganic microspheres and organic particles.

In some embodiments, the inorganic microspheres are selected from at least one of silica microspheres, alumina microspheres, and mica micro-platelets.

In some embodiments, the nano-diffusion particles have a particle size in the range of 1nm to 5 μm.

In some embodiments, the nano-diffusion particles have a particle size in the range of 100nm to 500nm.

In some embodiments, the shape of the nano-diffusion particles comprises at least one of spherical, ellipsoidal, and platelet shapes.

In some embodiments, the difference between the refractive index of the third diffusion layer and the refractive index of the first diffusion layer is less than 0.1.

In some embodiments, the first diffusion layer has a haze of 20% to 60% and a transmittance of greater than 90%.

In some embodiments, the relief microstructure has a size in a range of 2 μm to 10 μm.

In some embodiments, the second diffusion layer has a thickness in the range of 0.01 to 1 μm.

The transmissive screen provided by the embodiment is suitable for an orthographic projection system, and external light can be observed in front of the screen after sequentially passing through the first transparent substrate, the first diffusion layer, the nano metal reflection layer, the second diffusion layer, the third diffusion layer and the second transparent substrate from the rear of the screen. The projection light sequentially passes through the second transparent base material, the third diffusion layer and the second diffusion layer from the front of the screen, is reflected by the nano metal reflecting layer, sequentially passes through the second diffusion layer, the third diffusion layer and the second transparent base material again, and is observed in front of the screen. Due to the fact that the second diffusion layer is arranged, the projection light is dispersed by the second diffusion layer, the projection light in the dispersed state is not prone to total reflection in the third diffusion layer, and the problems of double images, dazzling light and the like caused by total reflection are solved.

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 will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and 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 transmissive screen according to an embodiment of the present disclosure;

fig. 2 is a schematic view of a light path of external light passing through a transmissive screen according to the present disclosure;

FIG. 3 is a schematic view of another light path of external light through a transmissive screen as set forth herein;

FIG. 4 is a schematic diagram of the path of projected light rays as they are reflected off of a transmissive screen as proposed herein;

fig. 5 is another schematic diagram of the optical path of the projection light rays as reflected on the transmissive screen proposed in the present application.

Detailed Description

In order to make the technical solution better understood by those skilled in the art, the technical solution in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application, are within the scope of protection of the present application.

In this application, the terms "mounted," "connected," "secured," and the like are to be construed broadly unless otherwise expressly specified or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through the inside of two elements, or they may be connected only through surface contact or through surface contact of an intermediate member. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "first," "second," and the like, are used solely to distinguish one from another and are not to be construed as referring to or particular structures. The description of the terms "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the application. In this application, the schematic representations of the terms used above are not necessarily intended to be the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples and features of the various embodiments or examples described in this application can be combined and combined by those skilled in the art without conflicting.

Example 1

As shown in fig. 1, the present embodiment provides a transmissive screen 1, which includes a first transparent substrate 10, a first diffusion layer 20, a nano-metal reflective layer 30, a second diffusion layer 40, a third diffusion layer 50, and a second transparent substrate 60. The first diffusion layer 20 and the second diffusion layer 40 are disposed on two sides of the nanometal reflective layer 30, and the third diffusion layer 50 is disposed on one side of the second diffusion layer 40 away from the nanometal reflective layer 30.

Specifically, the first transparent substrate 10 may be made of a rigid material such as acrylic or glass, or may be a flexible substrate such as PET or PC. Preferably, the thickness of the substrate may be 50 μm to 250 μm, and for example, the thickness of the first transparent substrate 10 may be 50 μm to 100 μm, 100 μm to 150 μm, 150 μm to 200 μm, 200 μm to 250 μm, and specifically, the thickness of the first transparent substrate 10 may be 50 μm, 100 μm, 150 μm, 200 μm, 250 μm, or any value between the two adjacent values, so that the first transparent substrate 10 has a certain support property and a high transmittance.

Referring to fig. 2, the first diffusion layer 20 is disposed on the surface of the first transparent substrate 10. The first diffusion layer 20 may be selected from one of a thermosetting resin, a two-component resin, or a photo-curing resin, and in the present embodiment, the first diffusion layer 20 is a photo-curing resin. The first diffusion layer 20 has a concave-convex microstructure, which may be formed on the first transparent substrate 10 by etching, transferring, or coating a resin containing the diffusion particles 21, and the like, and the concave-convex microstructure may have a size ranging from 2 μm to 10 μm, and specifically, the surface-adjacent protruding points of the concave-convex microstructure may have a size of 2 μm, 4 μm, 6 μm, 8 μm, 10 μm, or any value between the two adjacent values. The above-mentioned dimensional range refers to the absolute value of the difference in height between the undulations of the relief structure. Illustratively, the first coating liquid may be obtained by mixing the diffusing particles 21 with an acrylic resin having a solid content of 20% after being dispersed with a dispersant. After that, the first coating liquid is applied to the first transparent substrate 10 to form a mother film, and the concave-convex microstructure is transferred from the mother film to the first diffusion layer 20 by roll processing. In other embodiments, other processing forms may also be used, and are not limited herein. When external light L1 enters from the first transparent substrate 10 and passes through the transmissive screen 1, due to the concave-convex microstructure of the first diffusion layer 20, the light is diffusely reflected on the concave-convex microstructure to form light L1' that passes through the screen, so that the screen generates haze. The haze of the screen can be adjusted by adjusting the structure of the first diffusion layer 20.

In some embodiments, the first diffusion layer 20 has a haze of 20% to 60%. The haze of the exemplary first diffusion layer 20 may be 30% to 60%, 40% to 60%, 50% to 60%, and specifically, the haze of the first diffusion layer 20 may be 20%, 30%, 40%, 50%, 60%, or any value between the two adjacent values. Since the first diffusion layer 20 needs to transmit the external light L1, when the haze of the first diffusion layer 20 is higher than 60%, the problem that the imaging effect of the external light L1' is poor due to too high haze after the external light L1 transmits through the first transparent base layer and the first diffusion layer 20 may be caused. When the haze of the first diffusion layer 20 is lower than 20%, the haze is low, and the amount of the direct light in the external light L1 is large, and the direct light is easy to form total reflection in the screen after passing through the first diffusion layer 20, as shown in fig. 3, the problems of double images, glare and the like of the external light L1 on the screen are easy to occur. The haze of the first diffusion layer 20 is controlled within 20% to 60%. The transmittance of the first diffusion layer 20 is greater than 90%, and when the transmittance of the first diffusion layer 20 is less than 90%, the imaging effect of the external light after passing through the screen is poor, and the amount of the external light is less, which is more obvious in the environment such as the night. Therefore, in the present embodiment, the transmittance of the first diffusion layer 20 is controlled to be more than 90%.

Referring to fig. 4, the nano metal reflective layer 30 is disposed on the surface of the concave-convex microstructure far from the transparent substrate. By arranging the nano metal reflecting layer 30, the projection light L2 can be reflected on the nano metal reflecting layer 30, and then the picture can be displayed on the screen. The nano-metal reflective layer 30 may be made of high-reflective silver, aluminum, or the like. In the embodiment, the reflectivity of the nano-metal reflective layer 30 is controlled to be between 10% and 25%, and may be 10%, 15%, 20%, 25%, or any value between the two adjacent values, and the transmittance of the nano-metal reflective layer 30 to light is controlled to be between 60% and 80%, specifically, 60%, 70%, 80%, or any value between the two adjacent values, so that the projected light L2 can be reflected while passing through the outside.

In some embodiments, the thickness of the nanometal reflective layer 30 can be 12nm to 20nm, and for example, the thickness of the nanometal reflective layer 30 can be 12nm to 14nm, 14nm to 16nm, 16nm to 18nm, 18nm to 20nm, and in particular, the thickness of the nanometal reflective layer 30 can be 13nm, 15nm, 17nm, 19nm, or any value between the two adjacent values. The thickness of the nano-metal reflective layer 30 determines the reflectivity and transmissivity thereof, and too large or too small will affect the imaging of the external light L1 through the display screen or the reflected imaging of the projection light L2.

The second diffusion layer 40 is disposed on the surface of the nano-metal reflective layer 30 away from the first diffusion layer 20. The thickness of the second diffusion layer 40 may be 0.01 to 1 μm, and exemplarily, the thickness of the second diffusion layer 40 may be 0.01 to 0.21 μm, 0.21 to 0.41 μm, 0.41 to 0.61 μm, 0.61 to 0.81 μm, and 0.81 to 1 μm, and preferably, the thickness of the second diffusion layer 40 may be 0.1 to 0.5 μm, and specifically, the thickness of the second diffusion layer 40 may be 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, or any value between the above two adjacent values. The second diffusion layer 40 is used to further diffuse the projection light L2 reflected by the nano-metal reflection layer 30, so as to further optimize the problem that the projection light L2 is reflected and then totally reflected in the screen to cause glare or ghost as shown in fig. 5. In this embodiment, the second diffusion layer 40 includes a matrix 41 and nano-diffusion particles 42, the nano-diffusion particles 42 may be in various shapes such as spheres, ellipsoids, and sheets, the matrix 41 may be acrylic resin, and the acrylic resin has good light transmittance.

In some embodiments, the nano-diffusion particles 42 are selected from at least one of inorganic microspheres and organic particles. Preferably, the nano-diffusion particles 42 are organic particles. In other embodiments, the nanodiffusion particles 42 may also be a mixture of organic particles and inorganic microspheres. In this embodiment, the particle diameter of the organic particles may be 1nm to 5 μm, and for example, the diameter of the organic particles may be 1nm to 1000nm, 1000nm to 2000nm, 2000nm to 3000nm, 3000nm to 4000nm, and 4000 to 5000nm, and specifically, the particle diameter of the organic particles may be 500nm, 1500nm, 2500nm, 3500nm, and 4500nm, or any value between the two adjacent values. Different particle size selections produce different haze, transmission, and gain.

In other embodiments, it is preferred that the nanodiffusion particles 42 be inorganic microspheres. The inorganic microspheres are at least one selected from silica microspheres, alumina microspheres and mica micro-platelets. The particle size of the inorganic microspheres may be 100nm to 500nm, and illustratively, the diameter of the inorganic microspheres may be 100nm to 200nm, 200nm to 300nm, 300nm to 400nm, 400nm to 500nm, and specifically, the particle size of the inorganic microspheres may be 100nm, 200nm, 300nm, 400nm, 500nm, or any value between the two adjacent values. The haze and performance of the second diffusion layer 40 are affected by the selection of different particle sizes, and the inorganic microspheres are not easy to chemically react with the matrix in the process of dispersing into the matrix.

The third diffusion layer 50 is disposed on the surface of the second diffusion layer 40 away from the nanometal reflective layer 30. The third diffusion layer 50 serves to bond the second diffusion layer 40 and the second transparent substrate 60 together and to fill in irregularities on the second diffusion layer 40 due to the nano-diffusion particles 42. The thickness of the third diffusion layer 50 may be 1 μm to 50 μm, preferably 2 μm to 20 μm. Illustratively, the thickness of the third diffusion layer 50 may be 1 μm to 20 μm, 20 μm to 40 μm, 40 μm to 50 μm, and specifically, the thickness of the third diffusion layer 50 may be 10 μm, 20 μm, 30 μm, 40 μm, or any value between the two adjacent values. The third diffusion layer 50 may be a light-cured resin, a thermosetting resin, or the like, preferably an ultraviolet-cured resin, so that the refractive index of the third diffusion layer 50 is substantially the same as the refractive index of the first diffusion layer 20, thereby avoiding the problem that the final image is formed as a double image due to different outgoing angles of light rays reflected by different structures on the screen caused by different refractive indexes. In the embodiment, the difference between the refractive index of the third diffusion layer 50 and the refractive index of the first diffusion layer 20 is less than 0.1, so that the problem that the light is easy to generate total reflection due to different densities of the media is improved.

The second transparent substrate 60 is disposed on a surface of the third diffusion layer 50 away from the second diffusion layer 40. The material of the second transparent substrate 60 can be selected to be the same as the material of the first transparent substrate 10. The second transparent substrate 60 may protect the third diffusion layer 50.

In the transmissive screen 1 provided by the present application, external light can be observed in front of the screen after passing through the first transparent substrate 10, the first diffusion layer 20, the nano metal reflective layer 30, the second diffusion layer 40, the third diffusion layer 50, and the second transparent substrate 60 in sequence from the rear of the screen. The projection light L2 passes through the second transparent base material 60, the third diffusion layer 50, and the second diffusion layer 40 in this order from the front of the screen, is reflected by the nano-metal reflective layer 30, passes through the second diffusion layer 40, the third diffusion layer 50, and the second transparent base material 60 again in this order, and is observed in the front of the screen. Due to the second diffusion layer 40, the projection light L2 is dispersed by the second diffusion layer 40, and the projection light L2 in a dispersed state is not easily totally reflected in the third diffusion layer 50, so that problems of ghost, flare and the like caused by total reflection are reduced.

The above embodiments are only for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. A transmissive screen, comprising:

a first transparent base material, a second transparent base material,

the first diffusion layer is arranged on the surface of the first transparent substrate and is provided with a concave-convex microstructure;

the nano metal reflecting layer is arranged on the surface of the concave-convex microstructure far away from the transparent substrate, the reflectivity of the nano metal reflecting layer is 10% -25%, and the thickness range of the nano metal reflecting layer is 12nm-20nm;

the second diffusion layer is arranged on the surface, far away from the first diffusion layer, of the nano metal reflection layer and comprises nano diffusion particles with the particle size range of 50-200 nm and a matrix, and the thickness range of the second diffusion layer is 0.01-5 microns;

the third diffusion layer is arranged on the surface, far away from the nano metal reflecting layer, of the second diffusion layer; and

and the second transparent substrate is arranged on the surface of the third diffusion layer far away from the second diffusion layer.

2. The transmissive screen of claim 1, wherein the nano-diffusion particles are selected from at least one of inorganic microspheres and organic particles.

3. The transmissive screen of claim 2 wherein the inorganic microspheres are selected from at least one of silica microspheres, alumina microspheres, and mica micro platelets.

4. The transmissive screen of claim 2, wherein the nano-diffusion particles have a particle size in the range of 1nm to 5 μ ι η.

5. The transmissive screen of claim 4, wherein the nano-diffusion particles have a particle size in the range of 100nm to 500nm.

6. The transmissive screen of claim 2, wherein the shape of the nano-diffusion particles comprises at least one of spherical, ellipsoidal, and platelet shapes.

7. The transmissive screen of claim 1, wherein the difference between the refractive index of the third diffusion layer and the refractive index of the first diffusion layer is less than 0.1.

8. The transmissive screen of claim 1, wherein the first diffuser layer has a haze of 20% to 60% and a transmittance of greater than 90%.

9. The transmissive screen of claim 1, wherein the relief microstructure has a size in a range of 2 μ ι η to 10 μ ι η.

10. The transmissive screen of claim 1, wherein the second diffusion layer has a thickness in the range of 0.01 to 1 μ ι η.

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