CN113376952A - Transparent projection film curtain and ultra-short-focus projection system using same - Google Patents
Transparent projection film curtain and ultra-short-focus projection system using same Download PDFInfo
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- G—PHYSICS
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- 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
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Abstract
The invention relates to a transparent projection film curtain, which comprises a base layer, a microstructure layer, a first display bearing layer and a refractive index matching layer, wherein the upper surface of the microstructure layer is provided with an uneven surface with a microstructure, the uneven surface comprises a reflecting surface facing to the light direction of a target light source and a backlight surface facing away from the light direction of the target light source, the reflecting surface is provided with the first display bearing layer, and the upper surface of the first display bearing layer enables incident light from the target light source to be reflected within a visible range. The ultra-short-focus projection system prepared by the transparent projection film screen increases the whole permeability on the premise of ensuring the projection effect, solves the problem of light interference of external environment light to the visual range of human eyes, occupies small area, has low cost and is suitable for mass production.
Description
Technical Field
The invention relates to the technical field of projection display, in particular to a transparent projection film curtain and an ultra-short-focus projection system using the same.
Background
Transparent displays have recently received increased attention from many people as a special part of the display field. While other transparent display technologies are more or less problematic, transparent projection has gained some market and customer acceptance in recent years due to its particular form of presentation. Currently, front projection systems tend to evolve toward ultra-short focus projection systems, in which the projector is typically located in close proximity to the screen. The traditional front projection is mainly realized by the diffuse reflection of a curtain, and for the traditional projection equipment, the common projection curtain can realize the watching function; however, for the ultra-short-focus projection device, since the light emitted from the projector is transmitted at an ultra-wide angle, the light cannot be uniformly reflected to human eyes by a common projection screen, and thus the ultra-short-focus projection screen is suitable for the ultra-short-focus projection screen.
At present, the projection curtain for the ultra-short-focus market mainly takes a non-transparent anti-light curtain as a main part, and a Fresnel screen and a black curtain are adopted conventionally, the principle of the projection curtain is that the light emitted by a projector is reflected to human eyes by carrying out micro-structure processing on the surface of the curtain, and in addition, the same micro-structure can resist the interference of indoor and outdoor light rays, so that the better contrast is achieved. Patent CN105579904A discloses a directional polarization-maintaining screen, which can reflect light to the area of human eyes, but there is a tedious process in the curtain making, which is very difficult to be realized industrially. Patent CN104298063B discloses a transparent projection film curtain, which realizes the straightening and diffusion of light by means of a prism structure and a relief structure. However, it also has the problems of difficult manufacturing process and low possibility of mass production.
Disclosure of Invention
The main purpose of this application is to solve the problem that the traditional transparent projection screen can not be used in the ultra-short-focus market.
Another object of the present application is to address the non-transparency of conventional light resistant curtains.
Another object of the present application is to solve the problem of the current art that does not allow mass production of projection screens.
In order to achieve the above object, the present application provides a transparent projection film curtain, including a base layer, the base layer having a base layer lower surface and a base layer upper surface that are opposite to each other, and both the base layer lower surface and the base layer upper surface being flat surfaces; the upper surface of the base layer is provided with a microstructure layer, the microstructure layer is provided with a lower surface of the microstructure layer and an upper surface of the microstructure layer which are arranged in a back-to-back manner, the lower surface of the microstructure layer is a flat surface and is tightly attached to the upper surface of the base layer, the upper surface of the microstructure layer is an uneven surface, the uneven surface comprises a light reflecting surface facing to the direction of target light source light and a backlight surface facing back to the direction of the target light source light, and the microstructure layer has a first refractive index n 1; a first display bearing layer is arranged on the light reflecting surface, the first display bearing layer is provided with a first display bearing layer upper surface and a first display bearing layer lower surface which are arranged in a reverse manner, and the first display bearing layer upper surface enables incident light from a target light source to be reflected to a visible range; a refractive index matching layer is arranged on the first display bearing layer and the microstructure layer, the refractive index matching layer is provided with a lower refractive index matching layer surface and an upper refractive index matching layer surface which are arranged in an opposite way, the upper refractive index matching layer surface is a flat surface, the lower refractive index matching layer surface is tightly attached to and covers the upper microstructure layer surface and the upper first display bearing layer surface, and the refractive index matching layer is provided with a second refractive index n 2; wherein the first refractive index n1 is identical to the second refractive index n 2.
As a further improvement of the application, the light beam reflected by the upper surface of the first display bearing layer to any target light beam from the target light source is a first reflected light beam, the included angle between the first reflected light beam and the normal is beta, beta is more than or equal to 0 degree and less than or equal to 45 degrees, and the normal direction is perpendicular to the direction of the transparent projection film curtain.
As a further improvement of this application, the plane of transparent projection film curtain place is first vertical plane, the plane perpendicular to first vertical plane that target light source place is first horizontal plane, target light source shines target light beam on the first demonstration bearer layer upper surface with the contained angle of first horizontal plane is alpha, target light beam with the contact point of first demonstration bearer layer upper surface is reflection point P, the tangent line of reflection point P with the contained angle of first vertical plane is theta, structural design on the first demonstration bearer layer upper surface satisfies theta and is following formula:
as a further improvement of the present application, the thickness of the first display-supporting layer is 0.1nm to 50 nm.
As a further improvement of the present application, a second display carrying layer is disposed on the backlight surface.
As a further refinement of the present application, the thickness of the second display bearing layer is less than the thickness of the first display bearing layer.
As a further improvement of the present application, the uneven surface is at least one of a corrugated structured surface, a wedge-shaped structured surface, and a tapered structured surface.
As a further refinement of the present application, the characteristic length L1 between adjacent peaks or adjacent valleys of the upper surface of the microstructured layer is no greater than 2 mm.
As a further improvement of the present application, the height difference d between adjacent peaks or adjacent valleys of the upper surface of the microstructure layer is not more than 200 μm.
As a further improvement of the application, after projection light is reflected by the microstructure, the reflection intensity presents normal distribution along with an observer, and the half-width angle of the normal distribution is more than or equal to +/-20 degrees.
As a further improvement of the present application, an anti-oxidation layer is further disposed on an outer side of the first display bearing layer and/or the second display bearing layer.
As a further improvement of the application, the film forming process of the microstructure layer is any one of offset printing, transfer printing, micro-concave, slit and extrusion.
As a further improvement of the present application, the forming process of the microstructure layer is at least one of photo-curing, thermal curing, and EB curing.
As a further improvement of the present application, the resin for preparing the microstructure layer is a first optically transparent resin, and the resin for preparing the refractive index matching layer is a second optically transparent resin.
As a further improvement of the present application, the first optically transparent resin and/or the second optically transparent resin is at least one of an acrylic resin, a methacrylic resin, and a silane-based resin.
As a further improvement of the present application, a preparation process of the first display bearing layer and/or the second display bearing layer is physical vapor deposition, and the physical vapor deposition is at least one of a sputtering coating technology, an electron beam evaporation coating technology, and a thermal evaporation coating technology.
As a further improvement of the present application, the first display bearing layer and/or the second display bearing layer is prepared from a first target material capable of reflecting light after being coated.
As a further improvement of the present application, the first target material is at least one of titanium dioxide, silver, aluminum, and gold.
As a further improvement of the present application, the anti-oxidation layer is prepared from a second target material capable of preventing oxidation of the first display bearing layer and/or the second display bearing layer after coating.
As a further improvement of the present application, the second target is at least one of alumina and silica.
As a further improvement of the application, the material for preparing the base layer is at least one of polyethylene terephthalate, polymethyl methacrylate and polycarbonate.
In order to achieve the above object, the present application further provides an ultra-short-focus projection system, which includes a transparent projection film curtain, a fixing structure, and a projector located on one side of a refractive index matching layer in the transparent projection film curtain; the transparent projection film curtain is the above transparent projection film curtain.
As a further improvement of the present application, the projector is located near the plane of either side edge of the transparent projection film curtain.
The utility model provides a beneficial effect lies in, provides a transparent projection membrane curtain, including basic unit, micro-structure layer, first demonstration bearer layer and refractive index matching layer, wherein micro-structure layer upper surface sets up to the uneven surface that has the microstructure, uneven surface is equipped with first demonstration bearer layer on the reflection of light surface, first demonstration bearer layer upper surface makes the incident light reflection to the visible range that comes from target light source including the reflection of light face and the backlight face of target light source light direction dorsad towards target light source light direction on the reflection of light surface. The scheme increases the whole permeability on the premise of ensuring the projection effect, solves the problem of light interference of external environment light to the visual range of human eyes, occupies small area, is suitable for small-space environment, has low cost and is suitable for mass production.
Drawings
FIG. 1 is a schematic cross-sectional view of a transparent projection film curtain of example 1;
fig. 2 is a schematic cross-sectional view of a microstructure layer and a first display carrier layer of the transparent projection film curtain of embodiment 1;
FIG. 3 is an ultra-short-focus projection system using the transparent projection film curtain of embodiment 1;
FIG. 4 is a schematic diagram of a transmission path of a target beam emitted by a projector in an ultra-short-focus projection system;
FIG. 5 is a schematic view showing a transmission path of an interfering light beam passing through the transparent projection film curtain of embodiment 1;
FIG. 6 is a schematic cross-sectional view of the microstructure layer, the first display support layer and the second display support layer of the transparent projection film curtain of example 2;
FIG. 7 is a schematic top view of the microstructured layer of the transparent projection film of example 3;
in the figure: 1. a transparent projection film screen; 2. a projector; 3. an observer; 4. an observation area; 5. ambient light; 01. a base layer; 02. a microstructure layer; 03. a first display bearing layer; 04. an index matching layer; 05. a target beam; 06. a first reflected light beam; 07. a normal line; 08. an interference light beam; 09. a second reflected light beam; 10. a second display bearing layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, the following description of the present application will be made in detail and completely with reference to the specific embodiments and the accompanying drawings. It should be understood that the described embodiments are only a few embodiments of the present application, not all embodiments, and are not intended to limit the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to prepare a transparent projection film curtain applied to ultra-short-focus projection, which has low cost, can be produced in large scale and has excellent performance, the application provides a transparent projection film curtain 1, referring to fig. 1, which comprises a base layer 01, wherein the base layer 01 is provided with a base layer upper surface, a base layer lower surface and a base layer lower surface are arranged in a back-to-back manner, and the base layer lower surface and the base layer upper surface are flat surfaces; a microstructure layer 02 is arranged on the upper surface of the base layer, the microstructure layer 02 is provided with a lower surface of the microstructure layer and an upper surface of the microstructure layer, the upper surface of the microstructure layer is opposite to the lower surface of the microstructure layer, the lower surface of the microstructure layer is a flat surface and is tightly attached to the upper surface of the base layer, the upper surface of the microstructure layer is an uneven surface, the uneven surface comprises a light reflecting surface facing to the light direction of the target light source and a backlight surface facing away from the light direction of the target light source, and referring to fig. 2, the microstructure layer 02 has a first refractive index n 1; a first display bearing layer 03 is arranged on the light reflecting surface, the first display bearing layer 03 is provided with a first display bearing layer upper surface and a first display bearing layer lower surface opposite to the first display bearing layer upper surface, and the first display bearing layer upper surface enables incident light from a target light source to be reflected to a visible range; a refractive index matching layer 04 is arranged on the first display bearing layer 03 and the microstructure layer 02, the refractive index matching layer 04 is provided with a lower refractive index matching layer surface and an upper refractive index matching layer surface opposite to the lower refractive index matching layer surface, the upper refractive index matching layer surface is a flat surface, the lower refractive index matching layer surface is tightly attached to and covers the upper microstructure layer surface and the upper first display bearing layer surface, and the refractive index matching layer 04 is provided with a second refractive index n 2; wherein the first refractive index n1 is identical to the second refractive index n 2.
Based on the technical scheme, the structural design of the upper surface of the micro-structure layer comprises a reflecting surface facing to the direction of the light of the target light source and a backlight surface facing away from the direction of the light of the target light source, and the reflecting surface is provided with a first display bearing layer 03. This structure is designed differently according to the type of light beam irradiated onto the transparent projection film 1, the light beam irradiated onto the transparent projection film 1 includes a target light beam 05 emitted from a target light source (e.g. the projector 2) and an interference light beam 08 irradiated onto the transparent projection film 1 from the external environment, the target light beam 05 is a useful light beam to be reflected into the observation area 4, and the interference light beam 08 is to be prevented from entering the observation area 4, as shown in fig. 3. Therefore, the structural design of the reflective surface and the first display bearing layer 03 is beneficial to the convenient receiving and reflection of the target light beam 05 by the upper surface of the first display bearing layer 03, the structural design of the backlight surface is convenient for receiving the external environment light 5, one part of the external environment light 5 passing through the backlight surface is reflected outside the observation area 4, and the other part of the external environment light directly penetrates through the transparent projection film curtain 1.
In the present application, and referring to fig. 4 as a preferred embodiment, the light beam reflected by the upper surface of the first display support layer towards any target light beam 05 from the target light source is a first reflected light beam 06, the normal direction is a direction perpendicular to the transparent projection film curtain, i.e. a straight line perpendicular to the plane of the transparent projection film curtain 1 is defined as a normal 07, the angle between the first reflected light beam 06 and the normal 07 is β, β is 0 ° or more and 45 ° or less, and the target reflected light beam just enters the observation area 4 within this angle range. Further preferably, the plane of the transparent projection film curtain 1 is a first vertical plane, the plane of a target light source (such as a projector 2) perpendicular to the first vertical plane is a first horizontal plane, an included angle between a target light beam irradiated by the target light source onto the upper surface of the first display bearing layer and the first horizontal plane is α, that is, an included angle between a target light beam 05 irradiated by any one target light source onto the upper surface of the first display bearing layer and the first horizontal plane is defined as α, a contact point between the target light beam 05 and the upper surface of the first display bearing layer is a reflection point P, an included angle between a tangent line of the reflection point P and the first vertical plane is θ, and the structural design on the upper surface of the first display bearing layer satisfies the following formula:
in the present application, as a preferred embodiment, the thickness of the first display supporting layer 03 is 0.1nm to 50nm, and preferably, the thickness of the first display supporting layer 03 may be, but is not limited to, 2nm, 3nm, 5nm, 10nm, 20nm, 50nm, etc.; further, a second display bearing layer 10 is disposed on the backlight surface, the second display bearing layer 10 is seamlessly connected with the edge section of the first display bearing layer 03, and the second display bearing layer 10 and the first display bearing layer 03 completely cover the upper surface of the microstructure layer, that is: the first display bearing layer 03 and the second display bearing layer 10 together form a display bearing layer, which is continuous and completely covers the upper surface of the microstructure layer, as shown in fig. 6. Furthermore, the thickness of the second display bearing layer 10 is smaller than that of the first display bearing layer 03, and the structural design is beneficial to the first display bearing layer 03 to receive the light beam emitted by the target light source and reflect the target light beam 05 into a visible area, and meanwhile, the second display bearing layer 10 is beneficial to receiving the interference light beam 08 and reflect the interference light beam 08 out of the visible area or enable the interference light beam 08 to penetrate through the transparent projection film curtain 1.
In the present application, as a preferred embodiment, the first display supporting layer 03 and/or the second display supporting layer 10 may be prepared by, but not limited to, Physical Vapor Deposition (PVD), which is a method of vaporizing a coating material by a Physical method and depositing the coating material on a substrate surface to form a film, and includes various ion beam Deposition, ion plating and ion beam assisted Deposition techniques in addition to conventional vacuum evaporation and sputtering Deposition techniques. The deposition types include: vacuum evaporation, sputter plating, ion plating, and the like. The physical vapor deposition is preferably at least one of a sputtering coating technology, an electron beam evaporation coating technology and a thermal evaporation coating technology. The first display bearing layer and/or the second display bearing layer are/is prepared from a first target material which can reflect light after being coated, the first target material can be, but not limited to, metal or metal oxide, and the like, and preferably, the first target material can be, but not limited to, at least one of titanium dioxide, silver, aluminum, gold, and the like. Further, an anti-oxidation layer is further disposed on the outer side of the first display bearing layer 03 and/or the second display bearing layer 10, the anti-oxidation layer is prepared from a second target material which can prevent the first display bearing layer and/or the second display bearing layer from being oxidized after film coating, and the anti-oxidation layer mainly has the function of isolating the first display bearing layer 03 and/or the second display bearing layer 10 from air to prevent the first display bearing layer 03 and/or the second display bearing layer 10 from being oxidized. The second target material can be, but is not limited to, at least one of alumina and silicon dioxide.
In the present application, as a preferred embodiment, the uneven surface may be, but is not limited to, at least one of a corrugated structured surface, a wedge-shaped structured surface, and a tapered structured surface. It is further preferred that the characteristic length L1 between adjacent peaks or adjacent valleys of the upper surface of the microstructure layer is not greater than 2 mm. Further preferably, the height difference d between adjacent peaks or adjacent valleys of the upper surface of the microstructure layer is not greater than 200 μm. More preferably, after the projection light irradiates the microstructure for reflection, the reflection intensity presents normal distribution with an observer, and the half-width angle of the viewing angle of the normal distribution is more than or equal to +/-20 degrees. The microstructure preparation process of the microstructure layer 02 may be, but not limited to, any one of offset printing, transfer printing, slit, extrusion, etc.; the forming process of the microstructure layer 02 may be, but not limited to, at least one of photo-curing, thermal curing, EB curing, and the like; the resin for preparing the microstructure layer 02 is a first optically transparent resin, and the resin for preparing the refractive index matching layer 04 is a second optically transparent resin. Preferably, the first optically transparent resin and/or the second optically transparent resin may be, but not limited to, at least one of an acrylic resin, a methacrylic resin, and a silane-based resin. The material for preparing the base layer 01 may be, but not limited to, at least one of polyethylene terephthalate, polymethyl methacrylate, polycarbonate, and the like.
Based on the above technical scheme, the technical scheme of this application can be applied to transparent display technical field, and can be applied to the transparent display technology direction of ultrashort burnt, only need control the uneven microstructure of the micro-structure layer upper surface of transparent projection film curtain 1 and the structure of first demonstration bearer layer 03 and second demonstration bearer layer 10 can reach and make target beam 05 reflect to observation region 4 in, and avoided the interference of ambient light 5 to the people's eye, improved the contrast of picture, refer to fig. 5.
In order to achieve the above object, the present application further provides an ultra-short-focus projection system, which includes a transparent projection film curtain 1, a fixing structure, and a projector 2 located on one side of the refractive index matching layer 04 in the transparent projection film curtain 1; the transparent projection film curtain 1 is the transparent projection film curtain 1. Preferably, the projector 2 is close to the plane where any one side edge of the transparent projection film curtain 1 is located, and the determined position structure design of the projector 2 is beneficial to manufacturing the transparent projection film curtain 1 in the early stage and reducing the production cost. Preferably, the distance between the transparent projection film curtain and an observer is 3-5 m, and the size of the transparent projection film curtain is 80-100 inches. The projector with the vertical distance of transparent projection membrane curtain is less than 4m, and is preferred, the projector with the vertical distance of transparent projection membrane curtain is less than 3m, and is further preferred, the projector with the vertical distance of transparent projection membrane curtain is less than 1m, and is further preferred, the projector with the vertical distance of transparent projection membrane curtain is less than 0.5 m.
In order to facilitate understanding of the technical solutions of the present application, the present application further provides the following embodiments.
Example 1
As shown in fig. 1, a schematic cross-sectional structure diagram of a transparent projection film 1 is provided, the transparent projection film 1 is suitable for an ultra-short-focus projection system, and as can be seen from the figure, the transparent projection film 1 includes a base layer 01, a microstructure layer 02, a first display supporting layer 03, and an index matching layer 04. Because the projector 2 in a general ultra-short-focus projection system has a fixed position, we only need to reflect the target beam 05 emitted by the projector 2 at the fixed position into the human eye observation area 4, and for the above practical application characteristics, we have featured the structure of the transparent projection film curtain 1 to satisfy that the target beam 05 emitted from the projector 2 enters the visible area range after passing through the transparent projection film curtain 1.
In order to achieve the above purpose, the first display-supporting layer 03 in the transparent projection film screen 1 of the present embodiment is not continuous on the undulating microstructure layer 02, but has a plating layer at a specific position and no plating layer at other positions, as shown in fig. 2. Fig. 2 is a schematic cross-sectional structure diagram of a microstructure layer 02 and a first display carrier layer 03, and it can be seen from observation that, in the embodiment, the upper surface of the microstructure layer is a regular wavy structured surface, and is divided into two side surfaces based on a peak, a surface on one side irradiated by a target beam 05 of the projector 2 is defined as a reflective surface, a surface on one side not irradiated by the target beam 05 of the projector 2 is defined as a backlight surface, and a plating layer is disposed on the reflective surface, that is, the first display carrier layer 03. The transparent projection film curtain 1 with the structural design has the capability of reflecting light rays in a specific direction. After the transparent projection film curtain 1 with the structure is applied to a projection system, after a target light beam 05 emitted from the projector 2 is incident on the first display bearing layer 03, diffuse reflection is performed on the upper surface of the first display bearing layer, so that the target light beam 05 is incident in a visible range, and an image can be clearly seen, as shown in fig. 3. The microstructure layer 02 and the first display bearing layer 03 of this embodiment are designed according to an optical principle, the placement position of the projector 2 relative to the transparent projection screen determines the incident angle of the target light beam 05, the angle of the reflected light beam of the target light beam 05 passing through the transparent projection screen directly depends on the structure of the transparent projection screen, and according to a light reflection principle, the structure of the transparent projection screen can be designed so that the target light beam 05 is reflected within the visible range of human eyes. As shown in fig. 4, we define the vertical distance between the projector 2 and the plane of the transparent projection screen as H, the plane of the transparent projection screen as a first vertical plane, when the light from the projector 2 irradiates a certain point P of the transparent projection screen, the plane perpendicular to the first vertical plane where the projector 2 is located as a first horizontal plane, we define the vertical distance from the point P to the first horizontal plane as H, and we define the included angle between the vertical line m from the projector 2 to the first vertical plane and the vertical line n from the point P to the first horizontal plane as α, so as to obtain the following formula:
meanwhile, according to the position of the observer 3, the structure of the microstructure layer 02 and the first display bearing layer 03 in the transparent projection screen is designed for enabling the projection picture to just enter the observation area 4 of the observer 3. Here, we define a line perpendicular to the plane of the transparent projection screen or the first vertical plane as a normal line 07, a point where the target light beam 05 from the projector 2 is irradiated onto the transparent projection screen as P, an included angle between a reflection line of the target light beam 05 and the normal line 07 as β, and an inclination angle between a tangent of the microstructure of the upper surface of the first display support layer at the point P and the plane perpendicular to the transparent projection screen or the first vertical plane as θ. According to the reflection theorem, the relationship between the three can be converted:
for ultra-short focus projection, the positions of the projector and the transparent projection screen are usually fixed, and under the condition that the observation position of a person is relatively fixed, the distribution of the inclination angle of the microstructure reflection surface along with the change of the radius can be calculated according to the formula, so that the microstructure layer 02 and the first display bearing layer 03 of the transparent projection screen are designed according to the calculated value.
As can be seen from the schematic diagram of the reflection route of the projection screen shown in fig. 5 for the ambient light 5, when the ambient light 5 at the top of the projection screen irradiates on the screen, the direction of the ambient light 5 is from top to bottom, and when a part of the ambient light 5 irradiates on the first display bearing layer 03, the second reflected light beam 09 is formed, which is influenced by the surface microstructure of the first display bearing layer 03, i.e. the tangential angle is very large, so that the second reflected light beam 09 substantially irradiates on the ground, i.e. outside the visible region of the human eye, and does not affect the viewer; when another part of the ambient light 5 is irradiated to the non-display area, i.e. to the position of the micro-structure layer 02 without the plating layer, the part of the ambient light 5 will penetrate through the whole screen, and will not interfere with human eyes. Therefore, the structural design of the present embodiment avoids the interference of the ambient light 5 on the top of the projection screen to the projection effect.
Example 2
During the preparation of the display support layer, it may be discontinuous as in example 1, or it may consist of a continuous surface. As shown in fig. 6, a first display bearing layer 03 and a second display bearing layer 10 are prepared on a microstructure layer 02 by film plating, the second display bearing layer 10 is seamlessly connected with the edge section of the first display bearing layer 03, and the second display bearing layer 10 and the first display bearing layer 03 completely cover the upper surface of the microstructure layer. The material of which the first display supporting layer 03 and the second display supporting layer 10 are made may be, but not limited to, titanium dioxide, silver, aluminum, gold, etc.; the coating means for preparing the first display bearing layer 03 and the second display bearing layer 10 include, but are not limited to, physical vapor deposition technology, etc. An anti-oxidation layer for protecting the plating layer is disposed on the surfaces of the first display bearing layer 03 and the second display bearing layer 10 on the sides far away from the microstructure layer, and the commonly used anti-oxidation layer may be, but is not limited to, aluminum oxide, silicon dioxide, and the like.
In fig. 6, the area of the first display support layer 03 is defined as an area a, and the area of the second display support layer 10 is defined as an area b, so as to make the transparent projection film 1 have better reflection capability for light in a specific direction, that is, after the light emitted from the projector is incident on the first display support layer 03 and/or the second display support layer 10, the light is diffusely reflected on the surface of the microstructure of the first display support layer 03 and/or the second display support layer 10, and the image can be clearly seen. When the film coating is designed, the thickness of the coating in the area a is obviously larger than that of the coating in the area b, and when light irradiates the area a, the reflectivity of the light is obviously better than that of the area b, so that the transparent projection screen has weaker reflection to ambient light 5, the interference to human eyes is reduced, and the picture contrast is finally improved.
Example 3
Based on the high definition transparent projection film screens of examples 1 and 2, this example provides a process for preparing a transparent projection film screen:
first, a template of a predetermined surface microstructure is prepared according to the surface microstructure of the microstructure layer 02 to be produced. As shown in fig. 7, the template herein should satisfy the following requirements: the characteristic length L1 between adjacent peaks or adjacent valleys of the microstructure on the mold may be no greater than 2 mm. In a further preferred embodiment, the characteristic length L1 between adjacent peaks or adjacent valleys of the microstructure on the mold may be no greater than 0.5 mm. In still further preferred embodiments, the characteristic length L1 between adjacent peaks or adjacent valleys of the microstructure on the mold may be no greater than 0.1 mm. The height difference d between the peaks and valleys of the microstructure may be not more than 200 μm. In a further preferred embodiment, the height difference d between the peaks and the valleys of the microstructure may be not more than 100 μm. In a still further preferred embodiment, the height difference d between the peaks and valleys of the microstructure may be not more than 50 μm. Placing a base film under the template, wherein the base film is a base layer 01, the base layer 01 is provided with a base layer lower surface and a base layer upper surface opposite to the base layer lower surface, and the base layer lower surface and the base layer upper surface are flat surfaces; a first optically transparent resin is disposed therebetween, and the first optically transparent resin forms a film from the microstructure of the conformable master. The deposited film may then be cured via a photo-initiated process, a thermal curing process, or a combination of both curing processes. After curing the first optically transparent resin film, the film is peeled off from the template to obtain a microstructured layer 02 having a surface microstructure, said microstructured layer 02 having a lower microstructured layer surface and an upper microstructured layer surface opposite to said lower microstructured layer surface.
Secondly, 1) preparing a first display bearing layer 03 and/or a second display bearing layer 10, and coating the microstructure surface of the microstructure layer 02 to form a coating, wherein the target of the coating can be but is not limited to titanium dioxide, silver, aluminum, gold and the like, conventional coating means include but is not limited to physical vapor deposition technology and the like, and the physical vapor deposition technology includes sputtering coating technology and the like; 2) an anti-oxidation layer for protecting the plating layer is disposed on the outer side surface of the first display bearing layer 03 and/or the second display bearing layer 10 away from the microstructure layer 02, and the commonly used anti-oxidation layer may be, but is not limited to, alumina, silica, and the like.
Thirdly, a layer of second optically transparent resin is coated on the first display bearing layer 03 and the microstructure layer 02 or the first display bearing layer 03 and the second display bearing layer 10 by a wet coating process, and is cured by a photo-initiation process, a thermal curing process or a combination of the two curing processes after film formation to obtain a refractive index matching layer 04, wherein the refractive index matching layer 04 is the same as or close to that of the microstructure layer 02.
The first optically transparent resin or the second optically transparent resin may be, but not limited to, acrylic resin, methacrylic resin, silane-based resin, etc., and the preparation of the micro-structural layer 02 may be achieved by using any one of wet coating processes, including, but not limited to, offset printing, transfer printing, slit printing, extrusion, etc.
To sum up, the application provides a transparent projection film curtain 1, including basic unit 01, micro-structure layer 02, first demonstration bearer layer 03 and refractive index matching layer 04, wherein micro-structure layer upper surface sets up to the uneven surface that has the microstructure, uneven surface is including the plane of reflection of light and the backlight face of target light source light direction dorsad towards target light source light direction, is equipped with first demonstration bearer layer 03 on the plane of reflection of light, first demonstration bearer layer upper surface makes the incident light reflection that comes from target light source to the visible range in. The ultra-short-focus projection system prepared by the transparent projection film curtain 1 increases the whole permeability on the premise of ensuring the projection effect, solves the problem of light interference of external environment light 5 to the visual range of human eyes, occupies a small area, is suitable for small-space environment, has low cost and simple production process, and is suitable for mass production. And can also be applied to other transparent display industries, such as civil and military fields of transportation, buildings, advertisements and the like.
Although the present specification describes embodiments, not every embodiment includes only a single technical solution, and such description of the embodiments is only for clarity, and the technical solutions disclosed in the embodiments of the present invention are not limited to the technical solutions disclosed in the above technical solutions, and those skilled in the art should combine the descriptions as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments that can be understood by those skilled in the art.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (23)
1. A transparent projection film curtain comprising
The base layer is provided with a base layer lower surface and a base layer upper surface which are arranged oppositely, and the base layer lower surface and the base layer upper surface are flat surfaces;
the upper surface of the base layer is provided with a microstructure layer, the microstructure layer is provided with a lower surface of the microstructure layer and an upper surface of the microstructure layer which are arranged in a back-to-back manner, the lower surface of the microstructure layer is a flat surface and is tightly attached to the upper surface of the base layer, the upper surface of the microstructure layer is an uneven surface, the uneven surface comprises a light reflecting surface facing to the direction of target light source light and a backlight surface facing back to the direction of the target light source light, and the microstructure layer has a first refractive index n 1;
a first display bearing layer is arranged on the light reflecting surface, the first display bearing layer is provided with a first display bearing layer upper surface and a first display bearing layer lower surface which are arranged in a reverse manner, and the first display bearing layer upper surface enables incident light from a target light source to be reflected to a visible range;
a refractive index matching layer is arranged on the first display bearing layer and the microstructure layer, the refractive index matching layer is provided with a lower refractive index matching layer surface and an upper refractive index matching layer surface which are arranged in an opposite way, the upper refractive index matching layer surface is a flat surface, the lower refractive index matching layer surface is tightly attached to and covers the upper microstructure layer surface and the upper first display bearing layer surface, and the refractive index matching layer is provided with a second refractive index n 2;
wherein the first refractive index n1 is identical to the second refractive index n 2.
2. The transparent projection film curtain of claim 1, wherein the light reflected from the upper surface of the first display-bearing layer toward any object beam from the object source is a first reflected light beam that is at an angle β from normal, wherein β is 0 ° or more and 45 ° or less, and wherein the normal direction is perpendicular to the transparent projection film curtain.
3. The transparent projection film curtain of claim 2, wherein a plane of the transparent projection film curtain is a first vertical plane, a plane of the target light source perpendicular to the first vertical plane is a first horizontal plane, an included angle between a target light beam irradiated by the target light source onto the upper surface of the first display bearing layer and the first horizontal plane is α, a contact point between the target light beam and the upper surface of the first display bearing layer is a reflection point P, an included angle between a tangent of the reflection point P and the first vertical plane is θ, and a structural design on the upper surface of the first display bearing layer satisfies the following formula:
4. the transparent projection film curtain of claim 1, wherein the first display-bearing layer has a thickness of 0.1nm to 50 nm.
5. The transparent projection film curtain of claim 4, wherein a second display-bearing layer is disposed on the backlight surface.
6. The transparent projection film curtain of claim 5, wherein the thickness of the second display bearing layer is less than the thickness of the first display bearing layer.
7. The transparent projection film curtain of any of claims 1-6, wherein the uneven surface is at least one of a corrugated structured surface, a wedge structured surface, a conical structured surface.
8. The screen of claim 7, wherein the characteristic length L1 between adjacent peaks or adjacent valleys of the upper surface of the microstructured layer is no greater than 2 mm.
9. The transparent projection film curtain of claim 7, wherein the difference in height d between adjacent peaks or adjacent valleys of the upper surface of the microstructured layer is not greater than 200 μm.
10. The screen of claim 7, wherein the reflection intensity of the projected light reflected off the microstructures is normally distributed with the viewer, and the half-width angle of the normal distribution is ≧ 20 °.
11. The transparent projection film curtain of claim 6, further comprising an anti-oxidation layer disposed on an outer side of the first display-bearing layer and/or the second display-bearing layer.
12. The transparent projection screen of claim 1, wherein the film forming process of the microstructure layer is any one of offset printing, transfer printing, micro-recessing, slit, and extrusion.
13. The transparent projection film screen of claim 1, wherein the microstructure layer is formed by at least one of photo-curing, thermal curing, and EB curing.
14. The transparent projection film curtain of claim 1, wherein the resin from which the microstructured layer is made is a first optically transparent resin and the resin from which the index matching layer is made is a second optically transparent resin.
15. The transparent projection film curtain of claim 14, wherein the first optically transparent resin and/or the second optically transparent resin is at least one of an acrylic resin, a methacrylic resin, a silane-based resin.
16. The transparent projection film curtain of claim 6, wherein the first display bearing layer and/or the second display bearing layer is formed by a physical vapor deposition process, wherein the physical vapor deposition process is at least one of a sputter coating process, an e-beam evaporation coating process, and a thermal evaporation coating process.
17. The transparent projection screen of claim 6, wherein the first display bearing layer and/or the second display bearing layer is prepared from a first target material that reflects light after being coated.
18. The transparent projection screen of claim 17, wherein the first target is at least one of titanium dioxide, silver, aluminum, and gold.
19. The transparent projection screen of claim 11, wherein the oxidation resistant layer is formed from a second target material that is coated to prevent oxidation of the first display support layer and/or the second display support layer.
20. The transparent projection screen of claim 19, wherein the second target is at least one of alumina and silica.
21. The transparent projection screen of claim 1, wherein the substrate is made of at least one of polyethylene terephthalate, polymethyl methacrylate, and polycarbonate.
22. An ultra-short-focus projection system is characterized by comprising a transparent projection film curtain, a fixed structure and a projector positioned on one side of a refractive index matching layer in the transparent projection film curtain; the transparent projection film curtain of any one of claims 1-21.
23. The ultra-short focus projection system of claim 22, wherein said projector is located near a plane of either side edge of said transparent projection film sheet.
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| CN202110722904.5A CN113376952A (en) | 2021-06-29 | 2021-06-29 | Transparent projection film curtain and ultra-short-focus projection system using same |
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| CN202110722904.5A CN113376952A (en) | 2021-06-29 | 2021-06-29 | Transparent projection film curtain and ultra-short-focus projection system using same |
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Effective date of registration: 20231109 Address after: No. 280, Huangpujiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215500 Applicant after: Suzhou Zhengdao Optoelectronic Materials Co.,Ltd. Address before: 215500 No. 280, Huangpujiang Road, Changshu high tech Industrial Development Zone, Suzhou City, Jiangsu Province Applicant before: SMART LIQUID CRYSTAL TECHNOLOGIES Co.,Ltd. |
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