JP2020201395A - Screen film and image projection system - Google Patents

Abstract

To provide a screen film and an image projection system that can add light blocking performance not to allow image light to be seen through areas other than a projection area even at a narrow space, and make visibility of each of an image and a print part clearer.SOLUTION: A screen film 1 having a projection area 2 where an image made of image light is projected and print areas 4A to 4F, the print area includes a light blocking print layer whose optical concentration is 2.6 or more.SELECTED DRAWING: Figure 1

Description

The present invention relates to screen films and video projection systems.

Conventionally, as a means for advertising or advertising the sale of products or the provision of services, a means for magnifying and projecting an image on a screen is known.
For example, in Patent Document 1, as an advertising sheet made of a transmissive screen, a portion having light transmission and a portion having concealing property are mixed in the surface direction thereof, and corresponding to the portion having concealing property. An advertising sheet having an image portion has been proposed.

Japanese Unexamined Patent Publication No. 2005-37818

By the way, in a conventional rear projection system, it is necessary to install the projector at a certain distance from the screen. Therefore, the space from the projector to the screen becomes a so-called dead space, and the space available to the user is deprived by that amount. Therefore, it is necessary to narrow the space from the projector to the screen to eliminate the dead space. However, when the distance from the projector to the screen is shortened, the image light from the projector is projected on a part other than the projection surface (projection area). It becomes easy to see through.

Recently, a method has been adopted in which an image is projected from a projector onto a screen and a printing unit is provided in addition to the image projection unit to further enhance the advertising effect of the image. In such a case, when the image light to the image projection unit is applied to the printing unit, the image light leaks to the printing unit, or the original color tone of the printing unit is changed by the image light, and the visual effect of the printing unit is exhibited. It was sometimes reduced.

Even if a portion having a concealing property is provided as in Patent Document 1, there is a concern that the projected image (light) from the projector can easily be seen through the portion other than the projection surface, and a clear image cannot be obtained. .. In particular, as the distance from the projector to the screen becomes shorter, the transparency becomes more noticeable.

From the above, the present invention has been made in view of the above, and it is possible to impart a light-shielding property so that the image light does not pass through a portion other than the projection area even in a narrow space. It is an object of the present invention to provide a screen film and an image projection system in which the visibility of an image and a printing unit becomes clearer.

The present inventors have found that the above problems can be solved by the following invention, and have completed the present invention. That is, the present invention is as follows.

[1] A screen film having a projection area on which an image of image light is projected and a printing portion, wherein the printing portion includes a light-shielding printing layer, and the optical density of the light-shielding printing layer is 2.6 or more. , Screen film.
[2] according to the difference between the thickness of the light-shielding printed layer _{(T A)} and the thickness of the projection region other than the light-shielding printed layer _{(T B) (T A -T} B) is at 50μm or more [1] Screen film.
[3] the ratio between the luminance _{(L B)} of the projection area of the luminance of the light-shielding printed layer _{(L A)} other than the light-shielding printed layer _(L B / L _A) is 2.2 or more [1] or The screen film according to [2].
[4] The screen film according to any one of [1] to [3], wherein the light-shielding printing layer is formed around the projection area.
[5] The screen film according to any one of [1] to [4], wherein the light-shielding printing layer is a multilayer printing layer and includes a black printing layer, a white printing layer, and a color printing layer.
[6] An image projection system having the screen film according to any one of [1] to [5] and a projector, wherein the shortest distance from the lens of the projector to the screen film is 100 cm or less.

According to the present invention, it is possible to impart a light-shielding property so that the image light does not pass through a portion other than the projection area even in a narrow space, and the visibility of the image and the printed portion can be improved. It is possible to provide a clearer screen film and image projection system.

It is a schematic front view which shows the outline of one aspect of the screen film of this invention. It is a schematic front view which shows the outline of one aspect of the image projection system using the screen film of this invention. It is a schematic side view which shows the side surface of the image projection system of FIG. It is a schematic front view which shows the outline of another aspect of the image projection system using the screen film of this invention. It is a schematic side view which shows the side surface of the image projection system of FIG.

[Screen film]
The screen film according to one embodiment of the present invention (the present embodiment) has a projection region on which an image of video light is projected and a printing portion, and the printing portion includes a light-shielding printing layer.
.. The optical density of this light-shielding printing layer is 2.6 or more.

By having such a light-shielding printing layer, it is possible to impart light-shielding properties to a printing portion in a location susceptible to the influence of video light, and the influence of the video light on the printing portion is eliminated, so that the image and printing can be performed. The visibility of each part becomes clearer. Further, since the light-shielding printing layer can be processed by printing, mass productivity and finish accuracy are higher than those in which a light-shielding film is formed by laminating, and it is possible to cope with a complicated design.

When the distance from the light source to the screen, for example, the shortest distance is as short as 40 mm, the projected image (light) from the light source can easily be seen through a portion other than the projection surface. On the other hand, in the present embodiment, since the optical density of the light-shielding printing layer is 2.6 or more, at least the influence of the image light on the light-shielding printing layer is eliminated even in the above state, and the image and the light-shielding printing are printed. The visibility of each printed portion in the layer becomes clearer.

As shown in FIG. 1, the projection area 2 of the screen film 1 is an area where the projected image is irradiated by a projector or the like, for example, an area surrounded by a dotted line. Around it, for example, printing units 4A to 4C are formed from the viewpoint of obtaining a collaborative effect of video and printing. In such a case, if the image light from the projected images on the printing units 4A to 4C is affected, the original color tone of the printing unit changes, and it becomes difficult to give an intended impression. On the other hand, by forming the printing section (4A to 4C) of such a portion, that is, the portion affected by the video light as a light-shielding printing layer, the influence of the video light on the printing section is eliminated, and the image and printing are performed. The visibility of each part becomes clearer.
The printing section refers to a printed portion such as black-and-white printing, single-color printing, or multicolor printing, and the means for forming the printing section is not particularly limited, but an inkjet printing is preferable.
In the example of FIG. 1, in addition to the printing units 4A to 4C, the printing units 4D to 4F (the character portion of 4F is the printing unit) are also formed in places not affected by the image light from the projector. , These may be light-shielding printing layers or simple printing layers.

The light-shielding printing layer is a layer on which a monochromatic image or a color image is formed, and has an optical density of 2.6 or more as described above. When the optical density is less than 2.6, the image light can easily be seen through the printing portion around the projection area or the printing portion in the projection area. The optical density is preferably 2.7 or more, and more preferably 2.8 or more. The optical density can be measured by the method described in Examples.
From the viewpoint of printing characteristics and adhesion, the optical density is preferably 6.0 or less, more preferably 4.0 or less.

In order to form the light-shielding printing layer having an optical density of 2.6 or more as described above, a black printing layer (black printing layer) may be formed as the light-shielding printing layer. At that time, the density of the black printing layer It may be increased, the thickness may be increased, or two or more black printing layers may be formed.

The difference between the thickness of the light-shielding printed layer _{(T A)} and the printing unit without the projection area of the thick _{(T B) (T A -T} B) is preferably 50μm or more, more preferably 60μm or more , 70 μm or more, and more preferably 80 μm or more. T _A -T _B a With more than 50 [mu] m, each of the image visibility and printing unit becomes more clearly while maintaining good light shielding properties.
Incidentally, cracked ink during post-processing or during storage, it becomes easy to peel _off, T A -T _B is preferably 200μm or less, more preferably 150μm or less, still more preferably 100μm or less ..

The light-shielding printing layer is preferably a multilayer printing layer, and preferably includes a black printing layer, a white printing layer, and a color printing layer. The color print layer forms a color print image with the desired shade. The white print layer can suppress color transfer that causes the color tone to collapse and change to a color different from the intended color, secure color vividness and saturation, and improve whiteness. Further, the black printing layer can prevent leakage of video light mainly from the light-shielding printing layer.

The formation order of the black printing layer, the white printing layer, and the color printing layer and the number of each layer are not particularly limited, but the light-shielding printing layer is preferably composed of four or more layers, and is composed of five or more layers. Is more preferable. For example, in the case of a five-layer structure, the base film is formed in the order of color printing layer, white printing layer, white printing layer, black printing layer, and black printing layer, or color printing layer, white printing layer, and black printing. It is preferably formed of a layer, a white print layer, and a black print layer, or is preferably formed of a color print layer, a white print layer, a black print layer, a white print layer, and a color print layer. Of these, it is more preferable that the light-shielding printing layer is formed on the base film in the order of the color printing layer, the white printing layer, the white printing layer, the black printing layer, and the black printing layer.

A preferred embodiment of the screen film according to the present embodiment is to have a predetermined light-shielding printing layer including a color printing layer, a white printing layer, and a black printing layer on the base film. Hereinafter, the preferred embodiment will be described.

(Base film)
Examples of the resin constituting the base film include a cured product of a curable resin and a thermoplastic resin, and the thermoplastic resin is preferable. Examples of the thermoplastic resin include polycarbonate, thermoplastic polyester (polyethylene terephthalate, polyethylene naphthalate, etc.), triacetyl cellulose, cycloolefin polymer, polymethyl methacrylate, ethylene-tetrafluoroethylene copolymer (ETFE), etc., and have weather resistance and From the viewpoint of transparency, polycarbonate, thermoplastic polyester and cycloolefin polymer are preferable.

The thickness of the base film is preferably 50 to 300 μm, more preferably 100 to 200 μm.

(Light-shielding printing layer)
The black print layer can be formed, for example, with a known black UV curable ink. The thickness of one black printing layer is preferably 5 to 30 μm, more preferably 7 to 25 μm.

The white print layer can be formed with a known white UV curable ink. The thickness of one white printing layer is preferably 0.5 to 25 μm, more preferably 1 to 20 μm.

Color printing layer is, cyan (C), magenta (M), yellow (Y), light magenta _(L M), cyan _(L C), and optionally using known UV curable ink, such as black (K) It can be formed by The color printing layer forms graphic images such as characters, symbols, figures, images, photographs or various color images.
The thickness of one color printing layer is preferably 5 to 30 μm, more preferably 7 to 25 μm.

Brightness of the light-shielding printed layer of screen film according to the present embodiment (L _A), from the viewpoint of providing the visibility and good impression of definitive screen film printing, it is 0.3~2.0cd / m ² preferably, more preferably 0.4~1.5cd / ^{m 2,} further preferably 0.4~1.0cd / ^{m 2.}

The ratio of the luminance of the light-shielding printed layer of screen film according to the present embodiment (L _A) and the luminance of the projection area other than the light-shielding printed layer _{(L B) (L B /} L A) is not less than 2.0 It is preferably 2.2 or more, more preferably 2.4 or more. L B _/ L _A of 2.0 or more (preferably 2.2 or higher) Contrast (chromogenic) by a, in particular, a printing unit and the projection region becomes clear, each image visibility and printing unit There the ratio L _{B /} L _a of the luminance to be more clearly 2.0 or more to (preferably 2.2 or higher) and are black printed layer constituting the light-shielding printed layer, a white printing layer, the color printing layer The formation order is preferably, for example, a color printing layer, a white printing layer, a white printing layer, a black printing layer, and a black printing layer.

The light-shielding printing layer is preferably applied to a printing portion of a portion (inside, surroundings, etc.) affected by video light, and for example, the light-shielding printing layer is preferably formed around a projection area. Since it is formed around the projection area, it is possible to better eliminate leakage of image light to the printing portion around the projection area. In order to form the light-shielding print layer around the projection area, the print area under the printing conditions may be appropriately set.

The printing part of the portion that is not affected by the image light and the printing part that does not care about the influence of the image light are not the light-shielding printing layer according to the present invention, but the printing layer that does not limit the optical density, that is, the white layer and At least one of the color printing layers, or a combination of these with a black layer may be used so that the optical density is not high.

The screen film according to the present embodiment has a ratio (S1 / S2) of the area of the projection area (total if there are a plurality of projection areas) S1 and the area of the printing part (total if there are a plurality of printing parts) S2. ) Is preferably 1/5 or more, more preferably 3 / 10-5, and even more preferably 3 / 10-4. When the area ratio is 1/5 or more, a synergistic effect between projection and printing can be easily obtained.

Preferably the area of the screen film is 0.5~9m ^2, more preferably 1 to 4 m ^2.
The shape of each of the projection area and the printing portion is not particularly limited, and may be various shapes such as a rectangle, a square, and other polygons, a circle, an ellipse, and the like, and these may be continuous. , May be scattered.
Further, the shape of the screen film is not particularly limited to a rectangle such as a rectangle and a square, another polygon, a circle, an ellipse, and the like. When the screen film is rectangular, its width can be selected from 600 mm to 2000 mm, for example, 600 mm, 900 mm, 1200 mm, 1500 mm, 2000 mm and the like. The length can be selected in the range of 500 mm to 3000 mm.

The projection area may be transparent, opaque as long as it can be projected, or a combination of these. The parallel light transmittance in the transparent case is preferably 40% or more, and more preferably 45% or more. Further, the haze in the projection region when it is opaque in the projectable range is preferably 90 to 99%. The transmittance and haze can be measured according to JIS K-7105.

At least, a hard coat layer may be provided in the projection area as appropriate. The hard coat layer is laminated on the front surface side (observer side) or the back surface side of the projection region, and is a layer for imparting functions such as light resistance, scratch resistance, and antifouling property. The hard coat layer is preferably formed using a resin that does not impair the transmission visibility of the projection region and the desired optical characteristics. As such a resin, for example, a resin that is cured by ultraviolet rays or an electron beam, a resin obtained by mixing a thermoplastic resin with a solvent, or a thermosetting resin can be used.

The thickness of the hard coat layer is preferably 1 to 10 μm, more preferably 3 to 5 μm.

Further, a low reflection layer or an antireflection layer may be appropriately provided in the projection region. Specifically, a film with an antireflection layer may be bonded via an adhesive.

[Video projection system]
Hereinafter, one aspect (the present embodiment) of the image projection system of the present invention will be described.
The image projection system of the present embodiment is a system having the screen film of the present invention and a projector, and the shortest distance from the lens of the projector to the screen film is 100 cm or less.

According to the image projection system, a visually excellent effect can be obtained by the synergistic effect of projection and printing even in a narrow space. The effect is more remarkable when used for advertising, for example. For example, information such as the features and functions of the products and services provided, and related information (for example, store map information, information on various facilities and exhibits, event information such as event venues and event dates and times). If the video projection system is used for various advertisements, it is possible to leave a positive and good impression on the viewer.

In the image projection system of the present embodiment, as described above, the shortest distance from the lens of the projector to the screen film is 100 cm or less, preferably 20 to 70 cm, more preferably 20 to 60 cm, and further preferably 40 to 40 cm. It is set to 60 cm. If the shortest distance exceeds 100 cm, the installation space will become large. In order to make the shortest distance 100 cm or less, it is preferable to use a short focus or ultra short focus projector as a projector.
A plurality of projectors may be used as long as the space is not excessive. For example, a relatively large projector for the main projection area and a projector for the projection area having a decorative purpose around the projector may be used.

The total weight of the image projection system is preferably 15 kg or less, and more preferably 12 kg or less, from the viewpoint of making it easy to carry. Here, the total weight means the total mass of the screen film, the projector, the pedestal, and various members.

Further, it is preferable that a pedestal on which the projector is installed is provided on the projector side of the screen film, and the screen film and the pedestal are integrated via a connecting member. Examples of the connecting member include a pipe material and a plate material, which are appropriately fixed with screws or the like. Further, when the lower part of the support column for holding the screen film and the lower part of the pedestal are both connected to the same installation base, this installation base serves as a connecting member. Further, the connecting member may be stretchable so that the shortest distance can be adjusted, or the pedestal can be adjusted up and down so that the height of the projector can be adjusted.

In front view when the screen film is used, it is preferable to install the projector in an invisible area that cannot be seen from the projection area of the screen film. This prevents the projector from being seen through the image formed on the screen film surface on the side opposite to the projector side, and makes it easier to obtain a visually superior effect.

The image projection system of the present embodiment is, for example, indoors such as an exhibition hall in a department store, a movie hall, an aquarium, or an amusement park, preferably in a place where a large number of people and products do not allow a large space. It is preferable to carry out as PR of products / services, advance notice PR, front desk guidance, facility guidance, etc.

Hereinafter, the image projection system of the present embodiment will be described in more detail with reference to the drawings, but the present invention is not limited thereto.

(First example of video projection system)
In the first example, as shown in FIGS. 2 and 3, the screen film 10 is held by the columns 14 and 14 extending from the support base 15, and the projector 20 is behind the support base 15 on the drawing. It is provided on 32.

The screen film 10 includes a printing unit 12A, a projection area 12B, and a printing unit 12C in this order from the top. Further, the projector 20 is installed in an invisible area that cannot be seen from the projection area 12B of the screen film 10, that is, behind the printing unit 12C. Specifically, as the screen film 10, the screen film 1 and the like as shown in FIG. 1 are exemplified.

Here, the shortest distance from the lens 22 of the projector 20 to the screen film 10 is a distance corresponding to L in FIG. 3, and is 100 cm or less as described above. In the first example, since the screen film and the installation base having the pedestal are not integrated with each other via, for example, a connecting member, there is an advantage that the shortest distance can be freely set according to the installation space.

On the other hand, if the screen film and the installation base having the pedestal are integrated, for example, via a connecting member or the like, there is an advantage that the trouble of setting the shortest distance again can be saved, and the installation base is integrated. It is possible to improve the stability between the screen film and the projector.

The support column 14 may have a stretchable structure. By making it stretchable, the size of the screen film can be set freely.

(Second example of video projection system)
In the second example, as shown in FIGS. 4 and 5, the upper portion of the screen film 50 is held by the columns 54, 54 extending from the support base 55, and the lower portion thereof extends from the support base 55. It is held by (for example, a wire, a string, a chain, etc.). Behind the drawing, a projector 60 is provided on a pedestal 72 above the support 55.

The screen film 50 includes a printing unit 52A, a projection area 52B, and a printing unit 52C in this order from the top. Specifically, as the screen film 50, the screen film 1 and the like as shown in FIG. 1 are exemplified.
Further, the projector 60 is installed in an invisible area that cannot be seen from the projection area 52B of the screen film 50, that is, behind the printing unit 52C.

Here, the shortest distance from the lens 62 of the projector 60 to the screen film 50 is a distance corresponding to L in FIG. 5, and is 100 cm or less as described above. In the second example, since the screen film and the support base 55 having the pedestal are integrated with each other, there is an advantage that the trouble of setting the shortest distance again can be saved, and the integrated screen film has an advantage. And the sense of stability with the projector can be improved.

The support column 54 may be configured to be stretchable so that the length of the wire rod 56 can be adjusted accordingly. By making it stretchable in this way, the size of the screen film can be freely set.

Various improvements can be made to the image projection system according to the present embodiment in order to make the effect of the present invention more effective.
For example, a better effect (for example, an advertising effect) can be obtained by providing a sound source and producing a sound. In this case, the speaker serving as the sound source is not particularly limited, but it is preferable to use a speaker having high sound directivity. The speaker may be mounted on a tubular frame of a screen film, mounted on the back surface via a diaphragm, or the screen film may be curved and a speaker having a curved diaphragm may be provided on the back surface. Is preferable. By using such a speaker to make sound from the back side of the screen film (the side where the projector is provided) toward the front of the screen film, the person standing in front can hear the sound clearly, but the front If you deviate from the direction, you can hardly feel the sound. That is, the diffusion of sound can be prevented and noise to the surroundings can be prevented. In addition, it is possible to selectively play sound only for people who are interested in images or the like in front of the screen film.

Further, the time for projecting the image in the projection area may be set to flow at a fixed time. The video may be distributed from the Internet.
Further, in addition to the projection area and the printing unit, a writable area on which characters, figures, illustrations, etc. can be written with a pen or the like may be provided.

Next, the present invention will be specifically described with reference to Examples, but the present invention is not limited thereto.

[Example 1]
(Making screen film)
A color printing layer, a first white printing layer, and a second white color are printed on a PJB125K1W film (thickness: 125 μm) manufactured by Panac Co., Ltd. (Truepress Jet2500UV manufactured by SCREEN Holdings Co., Ltd.). A print layer, a first black print layer, and a second black print layer were formed in this order to form a light-shielding print layer (printing section).
The light-shielding printing layer was formed by printing on the central portion of the film having a width of 297 mm and a length of 210 mm with data having a width of 277 mm and a length of 190 mm in which cyan, magenta, yellow, and black were 100% each. The entire film is the projection area.

UV curable ink (UVIJET WJ White product number WJ021, manufactured by Dainippon Screen Mfg. Co., Ltd.) is used as the ink for the white printing layer, and UV curable ink (UVIJET) is used as the ink for the black printing layer. WJ Black product number WJ004, manufactured by Dainippon Screen Mfg. Co., Ltd. was used. In addition, as the ink for the color printing layer, the ink for the white printing layer and the ink for the black printing layer, as well as the yellow UV curable ink (UVIJET WJ Yellow product number WJ052, manufactured by Dainippon Screen Mfg. Co., Ltd.) and cyan. UV curable ink (UVIJET WJ product number WJ215, manufactured by Dainippon Screen Mfg. Co., Ltd.), Light cyan UV curable ink (UVIJET WJ product number WJ255, manufactured by Dainippon Screen Mfg. Co., Ltd.) Light magenta UV curable ink (UVIJET WJ product number WJ335, manufactured by Dainippon Screen Mfg. Co., Ltd.) and Magenta's UV curable ink (UVIJET WJ product number WJ867, manufactured by Dainippon Screen Mfg. Co., Ltd.) were used.

(Evaluation of screen film)
The optical density of the light-shielding printing layer was measured using a black-and-white transmission densitometer 361T (manufactured by X-rite, light source color temperature: 2850 K, aperture: 3 mm).
Further, to determine the difference between the thickness of the light-shielding printed layer _{(T A)} and the thickness of the projection area other than the light-shielding printed layer _{(T B) (T A -T} B).
Further, the luminance of the light-shielding printed layer _{(L A)} and the luminance of the projection area other than the light-shielding printed layer _{(L B)} was measured to determine the ratio _(L B / L _A).
A color luminance meter BM-7 (manufactured by Topcon Techno House, distance between the measurement target and the luminance meter: 350 mm, measurement angle: 1 °, measurement area: 5 mmφ) was used for the measurement of the luminance.

Further, from the side of the screen film where the light-shielding printing layer is not provided, an image is irradiated from a projector (WX4152N manufactured by Ricoh Co., Ltd.), and the vicinity of the light-shielding printing layer is visually observed to see if the image can be seen through or color printing. It was observed whether the color development was good. The shortest distance from the projector lens to the screen film was set to 40 mm.
The case where the image cannot be seen through and the color development of the print is good is defined as A, and the case where the image cannot be seen through but the color development of the print is slightly inferior to the A evaluation is defined as B, and the image can be seen through. The case where it ends up was designated as C.
These results are shown in Table 1.

[Example 2]
(Making screen film)
A color print layer, a first white print layer, a first black print layer, a second white print layer, and a second on a PJB125K1W film (thickness: 125 μm) manufactured by Panac Co., Ltd. A screen film was produced as a light-shielding printing layer in the same manner as in Example 1 except that the black printing layers were formed in this order.

(Evaluation of screen film)
The screen film was evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 1]
(Making screen film)
Same as Example 1 except that color printing, a first white printing layer, and a first black printing layer are formed in this order on a PJB125K1W film (thickness: 125 μm) manufactured by Panac Co., Ltd. To prepare a screen film with a light-shielding printing layer.

(Evaluation of screen film)
The screen film was evaluated in the same manner as in Example 1. The results are shown in Table 1.

In the first embodiment, both the light-shielding property and the color development were ensured at a high level, and the visibility of the image and the printed portion became clearer. Further, although the color development in Example 2 was not as high as that in Example 1, the visibility of each of the image and the printing unit was clear. On the other hand, in the comparative example, both the light-shielding property and the color development were low.

1,10 Screen film 4A-4F, 12A, 12C Printing section 2,12B Projection area 14 Support 15 Support base 20 Projector 22 Lens 30 Installation base 32 Pedestal

Claims (6)

A screen film having a projection area on which an image of image light is projected and a printing unit.
A screen film in which the printing portion includes a light-shielding printing layer and the optical density of the light-shielding printing layer is 2.6 or more. Screen film of the difference between the thickness _{(T B)} of the projection area of the thickness of the light-shielding printed layer _{(T A)} other than the light-shielding printed layer _(T A -T _B) is, according to claim 1 is 50μm or more .. According to claim 1 or 2, wherein the ratio between the luminance _{(L B)} of the projection area of the luminance of the light-shielding printed layer _{(L A)} other than the light-shielding printed layer _(L B / L _A) is 2.2 or more Screen film. The screen film according to any one of claims 1 to 3, wherein the light-shielding printing layer is formed around the projection area. The screen film according to any one of claims 1 to 4, wherein the light-shielding printing layer is a multilayer printing layer and includes a black printing layer, a white printing layer, and a color printing layer. An image projection system having the screen film according to any one of claims 1 to 5 and a projector, wherein the shortest distance from the lens of the projector to the screen film is 100 cm or less.

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