JP3988285B2 - Transmission projection screen - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high-contrast surface diffusion type transmissive projection screen.
[0002]
[Prior art]
Conventionally, there has been a transmission type projection screen in which a diffusion layer is formed by applying a resin mixed with light diffusing fine particles to the surface on the side of the viewer (see FIG. 3).
[0003]
In this transmissive projection screen, the surface diffusion layer is formed on the black stripe layer, so that black cannot be pushed out to the front surface, and the surface diffusion layer diffuses external light, thereby reducing the contrast. I was imitating.
[Problems to be solved by the invention]
[0004]
SUMMARY An advantage of some aspects of the invention is to provide a surface diffusion type transmissive projection screen having a high contrast.
[0005]
[Means for Solving the Problems]
In the present invention, a step of forming an ultraviolet curable resin layer on a flat surface of a lenticular sheet in which cylindrical lenses are arranged side by side and the other side is a flat surface, a light source and a lenticular sheet are arranged in the direction in which the cylindrical lenses are arranged side by side. Uncured UV curing of the part collected by each cylindrical lens by irradiating a band-shaped light beam extending in the longitudinal direction of the cylindrical lens while moving it relative to the flat surface of the lenticular sheet from the cylindrical lens side. A step of curing the mold resin layer, a step of coloring the surface of the resin layer other than the cured portion black and forming a black stripe layer on a flat surface, at least a polymer material, a tackifier and a solid thermoplastic containing a filler Piece of transparent base material with heat-sensitive adhesive composition having adhesive and infrared absorber as basic components A step of laminating the surface of the lenticular sheet on which the black stripe layer is formed and a surface of the substrate on which the heat-sensitive adhesive composition is coated, the flat surface of the lenticular sheet from the cylindrical lens side of the laminated sheet It is manufactured by irradiating infrared rays perpendicularly to the heat-sensitive adhesive composition to impart adhesiveness, peeling the substrate coated with the heat-sensitive adhesive composition, and treating the above steps in this order. A transmissive projection screen.
[0006]
[Action]
As described above, according to the present invention, the black stripe layer is formed on the substantially flat surface on the light output side of the image light of the single-sided lenticular sheet for a transmission type projection screen formed of a transparent material that does not contain light diffusing fine particles. A base material coated with a heat-sensitive adhesive composition containing a diffusing agent (filler) is laminated on it, and infrared rays are irradiated vertically from above the lens, and the light collecting property of the lens is utilized. Since heat is applied only to the condensing portion, only the condensing portion of the lens has adhesiveness, and the other portions do not have adhesiveness. Therefore, when the substrate is peeled off, a part having a diffusing agent remains only in the condensing part of the lens, and the other part is peeled off together with the substrate, and there is nothing on the black stripe layer. In this way, there is a diffusion layer only at the bottom of the condensing part of the lens, nothing is on the black stripe layer, and blackness is exposed to the outside. The reduction in blackness due to the presence of the diffusion layer on the top and the reduction in contrast due to external light reflection are avoided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail by way of examples. FIG. 1 is a cross-sectional explanatory view showing an embodiment of a transmission projection screen of the present invention, and FIGS. 2A to 2G are explanatory views showing the manufacturing process of the transmission projection screen of the present invention in the order of steps. .
[0008]
As shown in FIG. 1, the transmissive projection screen of the present invention has a photosensitive material 6 made of an ultraviolet curable resin layer formed on a flat surface of a lenticular sheet 11 made of a lens substrate 2 on which cylindrical lenses 1 are arranged. As a result, the black stripe layer 4 in which the resin layer surface of the uncured portion 3 of the photosensitive material 6 was colored black was formed, and the heat-sensitive adhesive composition layer 8 including the filler was formed on the cured portion 10. Consists of composition.
[0009]
In addition, a manufacturing process of the transmission projection screen of the present invention will be described in the order of steps (see FIGS. 2A to 2G).
[0010]
The lens substrate 2 is preferably formed by molding a transparent thermoplastic resin such as an acrylic resin, a vinyl chloride resin, or a carbonate resin by an arbitrary method.
In addition, a cured product of the resin using an ionizing radiation curable resin such as an ultraviolet curable resin or an electron beam curable resin, and further only a cylindrical lens of a lenticular sheet is a cured product of an ionizing radiation curable resin, What formed the cylindrical lens which consists of hardened | cured material of an ionizing radiation curable resin on the surface of a transparent resin base material may be used.
[0011]
First, an ionizing radiation curable resin layer 6 as a photosensitive material is formed on a flat surface of a lenticular sheet 11 comprising a lens base 2 having a cylindrical lens 1 arranged on one side and a flat surface on the other side (FIG. 2 ( a)).
[0012]
Separately, an ionizing radiation curable acrylic resin added with a black pigment is applied to a transparent polyester (PET) sheet to obtain a transfer sheet.
[0013]
The ionizing radiation curable acrylic resin layer 6 forming surface of the lenticular sheet 11 and the black colored layer forming surface of the transfer sheet are overlapped with each other, and the light source 12 and the lenticular sheet 11 are relative to each other in the direction in which the cylindrical lenses are juxtaposed. While moving, a band-shaped light beam extending in the longitudinal direction of the cylindrical lens is irradiated perpendicularly to the flat surface of the lenticular sheet 11 from the cylindrical lens side, and the uncured ionized portion of the portion condensed by each cylindrical lens is irradiated. The radiation curable resin layer 6 is cured (see FIG. 2B), and the colored layer is attached only to the uncured portion using the viscosity of the resin at the uncured portion, and the colored layer at the cured portion is lenticular sheet. The black stripe layer 4 which is a black light-shielding pattern is formed by peeling together with the transfer sheet from 11. (See FIG. 2 (c)).
[0014]
A diffusion layer 8 which is a heat-sensitive adhesive composition kneaded with a filler such as silica is applied to a transparent PET sheet to obtain a heat-sensitive adhesive sheet (see FIG. 2D).
[0015]
The surface of the lenticular sheet 11 on which the black stripe layer 4 is formed and the surface of the heat-sensitive adhesive sheet on which the diffusion layer 8 is formed are laminated opposite to each other (see FIG. 2 (e)).
[0016]
Then, when the infrared rays 13 are irradiated perpendicularly to the flat surface of the lenticular sheet 11 from the cylindrical lens side, the infrared rays are condensed by each cylindrical lens, and the heat-sensitive adhesive composition has adhesiveness (see FIG. 2 (f)). ).
[0017]
Finally, when the PET substrate of the heat-sensitive adhesive sheet is peeled off, the diffusion layer 8 remains only under the cylindrical lenses, and the transmission projection screen of the present invention is produced (see FIGS. 2 (g) and 1).
[0018]
According to the exposure process of FIG. 2 (f), each cylindrical lens functions in the same manner as when the entire surface of the lenticular sheet is irradiated with infrared rays from the cylindrical lens side.
In addition, the light diffusion pattern is for a light condensing part by irradiation of infrared rays on an actual lenticular sheet, and pattern formation is performed with a certain positional accuracy.
[0019]
【Example】
Examples of the present invention will be described more specifically below. The present invention is not limited to the one used below.
[0020]
<Example 1>
As the lenticular sheet 11, a transparent lens having a thickness of 1.0 mm and a cylindrical lens group having the following formulation made of a cured product of an ultraviolet curable resin was prepared.
Pitch: 0.4 mm, spherical radius: 0.35 mm, lens thickness: 0.063 mm, dimensions: 120 cm × 90 cm
[0021]
As the photosensitive material 6, a chromalin film (manufactured by DuPont) was prepared.
[0022]
On one side of a 25 μm thick transparent PET sheet, a colored layer having the following formulation was coated with a wire bar to a thickness of 1.5 μm to obtain a transfer sheet.
[0023]
Color layer prescription acrylic resin (manufactured by Mitsubishi Rayon Co., Ltd., BR80) 50 parts by weight carbon black 10 parts by weight solvent (MEK / toluene = 1/1) 40 parts by weight
A heat-sensitive adhesive composition having the following formulation was applied to one side of a transparent PET sheet having a thickness of 25 μm with a wire bar and dried at 45 ° C. for 2 minutes, and a heat-sensitive adhesive composition layer 8 having a film thickness of 18 μm. A heat-sensitive pressure-sensitive adhesive sheet was prepared (see FIG. 2 (d)).
[0025]
Heat-sensitive adhesive composition formulation The heat-sensitive adhesive composition comprises a polymer material, a tackifier, and a solid plasticizer as basic components. As a polymer material,
As an acrylic emulsion copolymer aqueous emulsion (solid content) 100 parts by weight tackifier,
An aqueous emulsion of rosin ester (softening point 84 ° C.) (solid content) 100 parts by weight as a solid plasticizer,
Dicyclohexyl phthalate aqueous dispersion (melting point 64 ° C.) (solid content) 100 parts by weight as water-soluble polymer
Polyacrylic acid soda (solid content) 10 parts by weight filler,
Silica 5 parts by weight as an infrared absorber
IR 820 (Nippon Kayaku Co., Ltd.) 5 parts by weight
These were mixed using a lower alcohol solvent having a solid content concentration of 50% to prepare a heat-sensitive adhesive composition exhibiting an aqueous resin dispersion (emulsion).
[0027]
On the flat surface of the lenticular sheet 11 prepared previously, a chromalin layer, which is an ultraviolet curable resin layer 6, was formed (see FIG. 2A).
[0028]
Next, while relatively moving the light source (ultraviolet light) 12 and the lenticular sheet 11 in the direction in which the cylindrical lenses are juxtaposed, the belt-shaped light beam extending in the longitudinal direction of the cylindrical lens 1 is directed from the cylindrical lens side to the flat surface of the lenticular sheet. By irradiating vertically, the uncured chromalin layer 6 in the portion condensed by each cylindrical lens is cured (see FIG. 2B).
[0029]
On this chromalin layer 6, the previously prepared transfer sheet is laminated so that the colored layer is in contact with the chromalin layer, and the colored layer of the cured part is peeled off from the lenticular sheet 11 so that the uncured part of the chromalin becomes black. The black stripe layer 4 which is colored and is a black shading pattern is formed (see FIG. 2C).
[0030]
The surface of the lenticular sheet 11 on which the black stripe layer 4 is formed and the surface on which the diffusion layer 8 of the heat-sensitive adhesive sheet is formed are laminated so as to be opposed (see FIG. 2 (e)).
[0031]
Infrared rays 13 are irradiated perpendicularly to the flat surface of the lenticular sheet from the cylindrical lens side of the laminated sheets. Infrared light is collected by each cylindrical lens, and the heat-sensitive adhesive composition containing the diffusing agent by heat has adhesiveness (see FIG. 2 (f)).
[0032]
Finally, when the heat-sensitive adhesive sheet is peeled off from the lenticular sheet, the diffusion layer 8 is heated only at the condensing part of each cylindrical lens, so that the part corresponding to the lens part is adhered to the lenticular sheet, and the other part is the adhesive sheet And peeled from the lenticular sheet (see FIG. 2 (g) and FIG. 1).
[0033]
As described above, the transmission projection screen of the present invention is manufactured. Then, the obtained transmissive projection screen is cured so that the lower part of the lens diffuses the projection light from the projector. Moreover, since the other part peeled off is a black light-shielding pattern, contrast becomes high.
[0034]
【The invention's effect】
In the prior art, since the light diffusion layer was laminated on the upper layer of the black stripe layer, the black color was blurred due to light diffusion, and a decrease in contrast was observed. Since the light diffusion layer is provided only on the black stripe layer and the light diffusion layer does not come above the black stripe layer, the black projection of the black stripe layer comes to the front, and the transmission type projection screen capable of observing a high-contrast image and the transmission type A method for manufacturing a projection screen can be provided.
[Brief description of the drawings]
FIG. 1 is an explanatory sectional view showing an embodiment of a transmission type projection screen of the present invention.
FIGS. 2A to 2G are explanatory views showing the manufacturing process of the transmission projection screen of the present invention in the order of steps.
FIG. 3 is an explanatory cross-sectional view showing an example of a conventional transmissive projection screen.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Cylindrical lens 2 ... Lens base material 3 ... Uncured part 4 ... Black stripe layer, stripe pattern 5 ... Adhesive surface 6 ... Photosensitive material, UV curable resin layer 7 ... Surface diffuser, Diffusion Layer 8 ... heat-sensitive adhesive composition layer containing filler, diffusion layer 9 ... base material 10 ... cured portion 11 ... lenticular sheet 12 ... light source 13 ... infrared rays

Claims (1)

A process of forming an ultraviolet curable resin layer on a flat surface of a lenticular sheet in which a cylindrical lens is arranged side by side and the other side is a flat surface, while relatively moving the light source and the lenticular sheet in the direction in which the cylindrical lenses are arranged side by side An uncured UV curable resin layer in a portion collected by each cylindrical lens is irradiated by irradiating a band-shaped light beam extending in the longitudinal direction of the cylindrical lens perpendicularly to the flat surface of the lenticular sheet from the cylindrical lens side. A step of curing, a step of coloring the surface of the resin layer other than the cured portion black and forming a black stripe layer on a flat surface, at least a polymer material, a tackifier, a solid thermoplastic agent, and an infrared ray absorption including a filler A heat-sensitive adhesive composition containing an agent as a basic component on one side of a transparent substrate The step of laminating the surface of the lenticular sheet on which the black stripe layer is formed and the heat-sensitive adhesive composition coated surface of the substrate to face each other, from the cylindrical lens side of the laminated sheet to the flat surface of the lenticular sheet It is manufactured by irradiating infrared rays perpendicularly to impart adhesiveness to the heat-sensitive adhesive composition, peeling the substrate coated with the heat-sensitive adhesive composition, and processing the above steps in this order. Characteristic transmissive projection screen.

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