JP2002350981A - Lenticular lens sheet having light shieldable layer and method of manufacturing for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for efficiently manufacturing a lenticular lens sheet with a light shieldable layer for a transmission type screen and to provide the lenticular lens sheet with the light shieldable layer which can be additionally improved in the contrast of videos when the transmission type screen is formed. SOLUTION: The lenticular lens sheet 2 having a lenticular lens group 3 on its one surface is composed of the structures formed with light shieldable layers 4a of >=2 in optical transmission density across transparent resin layers 5a at need in the non-beam-condensing portions of the non-lens surface of the sheet or formed with the light shieldable layers 5b in the beam-condensing portions, in which the non-beam-condensing portions are formed as recessed parts and are packed with the light shieldable layers of >=2 in optical transmission density. These structures can be efficiently manufactured by using photosensitive resins of a positive type or negative type, exposing the resins from the lens faces and developing the resins.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lenticular lens sheet having a light-shielding layer on the back surface used for a transmission screen and a method for producing the same.

[0002]

2. Description of the Related Art As a television having a large screen size, there is a so-called projection television in which an image is projected from the back and observed from the front. General CR
Projection CRT with higher brightness than T, liquid crystal (LCD)
Projection is performed using a projector or a DLP projector using a digital micromirror device (DMD).

[0003] A transmission screen 10 used in such a projection television or the like is shown in FIG.
As shown in FIG. 2, a Fresnel convex lens 11 and a lenticular lens sheet 12 with a light-shielding layer (also referred to as a black stripe) are used in combination. As viewed from an observer located below the figure, the incident light 20 that has entered from the projector disposed on the back (upper part of the figure) of the transmissive screen 10 is narrowed down by the action of the Fresnel convex lens 11, For example, it is the parallel light 21. The parallel light 21 is condensed by each lenticular lens 13 on the incident side of the lenticular lens sheet 12 and is emitted to the opposite side of the lenticular lens sheet 12 in a range indicated by an angle θ.
This is the range in which the image can be viewed.

On the exit side of the lenticular lens sheet 12 of the transmission screen 10 having such a function,
In order to prevent reflection of external light (for example, light from below in FIG. 1) and improve the contrast of an image, the non-convergence of each lenticular lens 13 on the non-lens surface on the exit side of the lenticular lens sheet 12 is improved. It has been practiced to cover a fixed width portion centered on the light portion with a light-shielding material and form a light-shielding layer 14 for use. This light-shielding layer 14
Is required to be formed at a position where the light 20 projected from the rear surface does not exit, as large as possible, so that it is necessary to form the lenticular lens with strict alignment with each lenticular lens on the rear surface. Various schemes have been considered.

[0005] In recent years, projection type televisions using LCD projectors or DLP projectors have emerged in place of those that enlarge and project CRTs. Light from these projectors is composed of pixels (dot matrix). A fine pitch lenticular lens sheet is required, which has a smaller pitch than that used when enlarging and projecting a CRT. For example, when enlarging and projecting a CRT, the pitch is 0.5 m.
m to 2.0 mm, but 0.05 to 0.3 m
m is now used.

In order to form the light-shielding layer 14 on the lenticular lens sheet 12 having such a fine pitch, it is preferable to use the lenticular lens 13 of the lenticular lens sheet 12 from the viewpoint of increasing accuracy.
For example, in Japanese Patent Application Laid-Open No. 9-120102, an ionizing radiation-curable resin layer is formed on a flat surface of a lenticular lens sheet, and the lenticular lens is exposed to light (eg, ultraviolet rays) from the lens surface side of the lenticular lens. A method is disclosed in which a resin layer is cured and a toner or a transfer layer of a transfer sheet is attached by utilizing the adhesiveness of the resin layer in the non-light-collecting portion.

[0007] However, the method described in the above-mentioned publication is based on the step of forming an ionizing radiation-curable resin layer and the exposure.
Each of the steps of curing the light-collecting portion and leaving the non-light-collecting portion tacky, and attaching the toner or the transfer layer to the non-light-collecting portion is required. Because of the large number and inefficiency, further improvements were desired.

[0008]

Accordingly, in the present invention, a lenticular lens sheet with a light-shielding layer for producing a transmissive screen in combination with a condensing means such as a Fresnel convex lens is more efficiently manufactured. In addition, as a lenticular lens sheet with a light-shielding layer, a material that can further improve image contrast when formed into a transmissive screen by combining with a light-collecting means or the like. It is intended to provide.

[0009]

According to the study of the present inventors, a layer of photosensitive resin is provided on one surface of a non-lens surface of a lenticular lens sheet, and uniform exposure is performed from the lens surface side. The light-shielding layer could be formed efficiently by making use of the fact that the state of the photosensitive resin was changed between the non-light-collecting portion and the subsequent development, so that either of them could be selectively removed. At this time, by using a light-shielding layer having an optical transmission density of 2 or more, the reflectance of external light is low, and therefore, the contrast of the image projected from the back is high for a lenticular for a transmission screen. A lens sheet could be obtained.

According to a first aspect of the present invention, a non-light-collecting portion of the lenticular lens is provided on the other surface of a lenticular lens sheet formed of a transparent sheet having a lenticular lens group having a plurality of lenticular lenses arranged on one surface. The present invention mainly relates to a lenticular lens sheet comprising a light-shielding resin composition containing a light-shielding colorant and a resin, wherein a light-shielding layer having an optical transmission density of 2 or more is laminated. According to a second aspect of the present invention, on the other surface of a lenticular lens sheet formed of a transparent sheet having a lenticular lens group in which a plurality of lenticular lenses are arranged on one surface, the non-light-collecting portion of the lenticular lens is centered. The optical transmission density of the light-shielding resin composition containing the light-shielding colorant and the resin and the light-shielding layer having a light transmission density of 2 or more are laminated via a layer made of the resin not containing the light-shielding colorant. The present invention relates to a characteristic lenticular lens sheet. According to a third aspect of the present invention, a lenticular lens sheet formed of a transparent sheet having a lenticular lens group having a plurality of lenticular lenses arranged on one surface is provided on the other surface of the lenticular lens sheet.
With the non-light-collecting portion of the lenticular lens as the center, at least the layer opposite to the lenticular lens sheet side of a layer mainly composed of a transparent resin is colored with a light-shielding colorant, and has an optical transmission density of 2 or more. A lenticular lens sheet, wherein the light-shielding layer is formed. According to a fourth aspect of the present invention, a lenticular lens sheet composed of a transparent sheet having a lenticular lens group in which a plurality of lenticular lenses are arranged on one surface is provided on the other surface of the lenticular lens sheet, with the lenticular lens as a center. Since the resin layer is laminated, a portion where the transparent resin layer is not laminated forms a concave portion, and the concave portion is filled with a light-shielding resin composition containing a light-shielding colorant and a resin. Accordingly, the present invention relates to a lenticular lens sheet, wherein a light-shielding layer having an optical transmission density of 2 or more is laminated. In a fifth aspect based on any of the first to fourth aspects, the lenticular lens sheet comprises a lenticular lens layer in which the lenticular lens group is formed on a surface of a lenticular lens forming resin layer, and the lenticular lens layer is laminated on a transparent film. And a lenticular lens sheet characterized in that: According to a sixth aspect of the present invention, a lenticular lens sheet including a transparent sheet having a lenticular lens group in which a plurality of lenticular lenses are arranged on one surface contains a light-shielding colorant and a photosensitive resin on the other surface. After laminating a layer of a resin composition having a uniform thickness of 2 or more optical transmission densities, performing exposure from the side having the lenticular lens group of the lenticular lens sheet, and developing after performing the exposure, Of the light-collecting portion and the non-light-collecting portion of the lenticular lens at the time of exposure, the light-collecting portion removes the layer of the resin composition, and the non-light-collecting portion comprises a cured product of the resin composition. The present invention relates to a method for manufacturing a lenticular lens sheet having a light-shielding layer, wherein the light-shielding layer is formed. A seventh invention is characterized in that, in the sixth invention, the photosensitive resin is a positive type, and a layer of the resin composition in a light collecting portion of the lenticular lens at the time of exposure is removed by development. The present invention relates to a method for manufacturing a lenticular lens sheet having a light-shielding layer. According to an eighth aspect of the present invention, there is provided a lenticular lens sheet formed of a transparent sheet having a lenticular lens group in which a plurality of lenticular lenses are arranged on one surface, and a transparent film having a uniform thickness having a positive photosensitive property on the other surface. After laminating the resin layer, exposure is performed from the side having the lenticular lens group of the lenticular lens sheet, and development is performed after exposure, so that the condensing portion and the non-condensing portion of the lenticular lens at the time of exposure are exposed. Among the above, while removing the transparent resin layer in the light-collecting portion, and leaving the transparent resin layer in the non-light-collecting portion, on the remaining transparent resin layer, a light-shielding colorant and a resin An optical transmission density comprising a light-shielding resin composition containing 2 or more light-shielding layers or a transparent resin layer remaining in the non-light-collecting portion A method for producing a lenticular lens sheet having a light-shielding layer, wherein the optical transmission density is colored with a light-shielding coloring agent so that two or more. A ninth invention is directed to a lenticular lens sheet composed of a transparent sheet having a lenticular lens group in which a plurality of lenticular lenses are arranged on one surface, and a transparent film of a uniform thickness having negative photosensitivity on the other surface of the lenticular lens sheet. After laminating the resin layer, exposure is performed from the side having the lenticular lens group of the lenticular lens sheet, and development is performed after exposure, so that the condensing portion and the non-condensing portion of the lenticular lens at the time of exposure are exposed. Among the above, while leaving the transparent resin layer in the light-collecting portion, by removing the transparent resin layer in the non-light-collecting portion, the concave portion formed of the transparent resin layer removal portion in the non-light-collecting portion Then, by selectively filling the concave portion with a light-shielding resin composition containing a light-shielding colorant and a resin, the optical transmission Degrees a method for producing a lenticular lens sheet having a light-shielding layer, characterized in that to form at least two light-shielding layer.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 2 to 4 are drawings relating to the lenticular lens sheet of the present invention and the manufacturing process thereof.

There are several types of lenticular lens sheet 1 having a light-shielding layer according to the present invention.
The one shown in (a) is formed of a transparent sheet, and the other surface of the lenticular lens sheet 2 having a lenticular lens group in which a large number of lenticular lenses 3a are arranged on one surface (the upper surface in the figure). (Bottom in the figure)
In addition, a light-shielding layer 4a having an optical transmission density of 2 or more is stacked around each non-light-collecting portion of the lenticular lens on the opposite surface. This light-shielding layer 4a is not laminated on the area centered on each of the condensing portions of the lenticular lens on the opposite surface. Are stacked.

As shown in FIG. 2B, the lenticular lens sheet 1 having the light-shielding layer of the present invention has a light-shielding layer 4a laminated on the lower surface of the lenticular lens sheet 2 via a transparent resin layer 5a. It may be. also,
The light-shielding layer 4a has an optical transmission density of 2 or more,
The position itself for laminating these two layers is the same as the position described with reference to FIG. Although not shown, the light-shielding layer 4a is formed of a transparent resin layer 5a.
Instead of a layer that can be clearly distinguished from the transparent resin layer 5, a part (the lower part in the figure) of the transparent resin layer 5a may be colored with a light-shielding material to have an optical transmission density of 2 or more.

The lenticular lens sheet 1 having a light-shielding layer according to the present invention may be as shown in FIG. In FIG. 2C, a transparent resin layer 5b is laminated on the lower surface of the lenticular lens sheet 2 around the condensing portion of each of the lenticular lenses on the opposite surface. The lenticular lens of the surface is not laminated in the area centered on each condensing part, but is laminated with an interval corresponding to the pitch of the lenticular lens on the opposite surface. The non-existent portion forms a concave portion, and the concave portion is filled with a light-shielding resin composition, and a light-shielding layer 4 having an optical transmission density of 2 or more is laminated.

Each of the above examples shows the structure of the lenticular lens sheet 1 having the light-shielding layer of the present invention, and these structures have a lenticular lens of a lenticular lens sheet made of a transparent sheet. On the other side, that is, on the non-lens surface side, a layer containing a photosensitive resin is laminated and exposed using a lenticular lens, and as a result, a part where the light shielding layer 4 is laminated and a part where the light shielding layer 4 is not laminated It is preferable to manufacture by the method of distinguishing between.

The lenticular lens sheet 2 made of a transparent sheet according to the present invention is shown in FIGS. 2 (a) to 2 (c).
As described using, it is possible to use what was manufactured as an integrated structure, such a structure can be obtained by press molding or casting, as described below, A lenticular lens group composed of a lenticular lens layer formed on the surface of a resin layer on a flat transparent sheet has a laminated structure that can be manufactured accurately and efficiently. It is more preferable to use.

Referring to FIG. 3, a preferred method for producing a lenticular lens sheet having such a laminated structure will be described. First, a transparent sheet 6 serving as a base film
Are unwound from the right side of the drawing, and a mold roller 32 that rotates clockwise and a pressing roller 31 that is pressed against the mold roller 32 and rotates counterclockwise are installed facing each other. Supplied in between.

Before the transparent sheet 6 is sandwiched between the mold roller 31 and the pressing roller 32, an ionizing radiation-curable resin composition, for example, an ultraviolet curable resin composition is dispensed by a dispenser 33 installed diagonally above the mold roller 32. Resin composition 7
a is supplied, and the supplied ionizing radiation-curable resin composition 7 a is sent below the mold roller 32 while being sandwiched between the mold roller 32 and the transparent sheet 6.

The mold roller 32 has a mold surface on the surface of which a number of grooves having a reverse shape of the surface shape of a lenticular lens group in which lenticular lenses are arranged are formed in parallel along the circumference. A mold roller, usually a metal roller.

Below the mold roller 32, an ultraviolet irradiation device 34 is installed. Since the ultraviolet irradiation is performed upward, the ultraviolet curable resin composition 7a is cured. The cured product of the resin composition 7a is
The shape of the mold surface is shaped to form a lenticular lens layer 7 in which a lenticular lens group is formed, and the lenticular lens sheet 2 which is a laminate in which the layer 7 is laminated with the transparent sheet 6 is formed. Thereafter, the lenticular lens sheet is moved to the left of the mold roller 32 while being wound around the mold roller 32 until it reaches the release roller 35 provided so as to nip the mold roller 32. 2 is peeled off.

There are several methods for manufacturing the lenticular lens sheet 1 having a light-shielding layer according to the present invention, and these methods include the following common steps. First, as shown in FIG. 4A, a resin layer 8 having a uniform thickness containing a photosensitive resin is laminated on the side of the lenticular lens sheet 2 having no lenticular lens 3a. The lamination of the resin layer 8 is performed by printing a resin composition containing a photosensitive resin by a known printing method or coating using a coating method, and also in a field of performing etching in a pattern using a resist. This may be performed by pressing a so-called dry film.

Next, exposure light 9 is incident on the resin layer 8 from the side of the lenticular lens 3a of the lenticular lens sheet 2 to perform exposure. Exposure is usually performed using parallel light from the normal direction of the lenticular lens, and the light is condensed by each lenticular lens 3a to form a light condensing portion substantially near the resin layer 8. As the exposure light, an electron beam or an ultraviolet ray is selected and used depending on the photosensitive resin to be used. Usually, ultraviolet rays are often used because the photosensitive resin is ultraviolet-sensitive.

When the photosensitive resin constituting the resin layer 8 is of a positive type by the above exposure, the resin is decomposed at the condensing portion of the resin layer 8 and the solubility in a solvent usually increases. After the exposure, the resin layer 8 corresponding to the light-collecting portion is removed by dipping the resin layer 8 in a predetermined developing solvent or by wiping it with a cloth or the like containing the solvent. The resin layer 8a remains only in the portion.

When the photosensitive resin constituting the resin layer 8 is a negative type by the above-described exposure, the light-collecting portion of the resin layer 8 is further polymerized, and usually has a high solubility in a solvent. After the exposure, the resin layer 8 corresponding to the non-light-collecting portion is removed by immersing the resin layer 8 in a predetermined developing solvent or wiping it with a cloth or the like containing the solvent. The resin layer 8b remains only in the light collecting portion.

The above-mentioned common process is actually performed as follows. When the photosensitive resin constituting the resin layer 8 is of a positive type and the resin layer 8a remains in the non-light-collecting portion, the light-shielding colorant and the photosensitive resin When the resin layer 8 having a uniform thickness having an optical transmission density of 2 or more is formed, the resin layer at the light-collecting portion of the lenticular lens is removed by exposure and development, and Since the light-shielding layer can be left, the lenticular lens sheet 2 having the light-shielding layer as described with reference to FIG. 2A can be obtained.

When the light-shielding colorant is used together with the photosensitive resin as described above, the transmission of the exposure light into the resin layer 8 is suppressed. Exposure time tends to be longer than when not.

Therefore, when the resin layer 8 is first laminated, a light-shielding colorant is not used, and then exposure and development are performed to leave the transparent resin layer in the non-light-collecting portion, and the remaining transparent resin layer is left. The resin layer may be provided with light-shielding properties. For example, a structure having the structure described with reference to FIG. 2B may be formed by first forming a transparent resin layer 5a, and forming a transparent resin layer 5a on the transparent resin layer 5a. A light-shielding property can be imparted by laminating the light-shielding layer 4a having an optical transmission density of 2 or more. As described above, according to the method of forming the transparent resin layer on a predetermined portion and forming the light-shielding layer thereon, the number of steps is increased by one step, but the efficiency of exposure is high, so that exposure can be performed in a short time. ,
When the light-shielding layer is formed, curing by exposure is not always necessary, and the light-shielding colorant in the composition for forming the light-shielding layer can be blended at a high concentration. It is suitable for forming a high light-shielding layer.

Alternatively, a light-shielding colorant is applied to the transparent resin layer 4a at the non-light-condensing portion by attaching ink or dyeing with a dye. The light-shielding layer may be formed by coloring the opposite side.

When the photosensitive resin constituting the resin layer 8 is of a negative type and the resin layer 8b remains in the light-collecting portion, a light-shielding colorant is used when the resin layer 8 is first laminated. In this case, the transparent resin layer in the non-light-collecting portion is removed, and the transparent resin layer is left in the light-collecting portion, thereby forming a concave portion in the non-light-collecting portion. Next, the concave portion is selectively filled with a light-shielding resin composition containing a light-shielding colorant and a resin to form a light-shielding layer having an optical transmission density of 2 or more. The selective filling of the light-shielding resin composition into the recesses is performed by preparing the light-shielding resin composition as a paint, and uniformly supplying and applying the light-shielding resin composition to the surface having the recesses. It can be carried out by removing the light-shielding resin composition adhering to other components with a cloth or a doctor device. According to this method, since the light-shielding layer is formed by forming the concave portion and filling the concave portion, the shape of the obtained light-shielding layer when viewed from the non-lens surface is sharp.

In the method of manufacturing a lenticular lens sheet having a light-shielding layer described above, the resin other than the resin used for the purpose of removing or remaining by exposure and development may be thermoplastic or thermosetting, or may be an ultraviolet ray. It may be ionizing radiation curable such as curable.

As the light-shielding colorant for imparting light-shielding properties to the light-shielding layer, various types can be used, but a black or near-black dark pigment or dye is preferable, and carbon black is typically used. It is. These light-shielding colorants are used in such an amount that the light-transmitting density of the light-shielding layer is 2 or more, and more preferably 3 or more, regardless of which way the light-shielding colorant is applied. When the optical transmission density of the light-shielding layer of the lenticular lens sheet having the light-shielding layer of the present invention is 2 or more, reflection of external light on the lenticular lens sheet is extremely small when observed from the side where the light-shielding layer is provided. When the optical transmission density is 3 or more, the effect of further reducing the reflection of external light is further increased, and the lenticular lens for a transmission screen having a high contrast of an image projected from the back surface. It is of high use value as a sheet.

The lenticular lens sheet 1 having the light-shielding layer of the present invention as shown in FIGS. 2A to 2C is itself a very thin film.
Independently, it is often difficult to maintain a form in an upright state, that is, there is no so-called independence. Therefore, FIG.
As shown in (a), the lenticular lens sheet 1 having a light-shielding layer has a relatively light-transmitting, relatively self-supporting side on the side having the light-shielding layer portion 4 and the light-transmitting portion 5. The sheet or plate 15 is preferably used by laminating via an adhesive layer 16 having transparency. In the type shown in FIG. 5A, a light-diffusing material is used as the sheet or plate 15 or a light-diffusing layer laminated on any surface of the sheet or plate 15 is used. You can also. Alternatively, as shown in FIG. 5B, the Fresnel convex lens 11 is disposed on the lens side of the lenticular lens sheet 1 having a light-shielding layer, preferably via a transparent adhesive layer 16.
Can also be laminated. As described with reference to FIG. 1, a lenticular lens sheet 1 having a light-shielding layer
Is often used in combination with a light-collecting lens such as a Fresnel convex lens. Although not shown, a light-collecting lens such as a Fresnel convex lens is laminated on the lens side of the lenticular lens sheet 1 having the light-shielding layer, as shown in FIG. On the opposite side, as shown in FIG. 5 (a), a sheet or plate having light diffusivity or light transmissivity may be laminated.

When the pitch p of the lenticular lens on the opposite surface is about 50 μm to 300 μm, the width of the light-shielding layer 4 is preferably about 0.3 p to 0.9 p. In addition, the width of the light-shielding layer 4 may be appropriately determined depending on the application and the manufacturing accuracy.

The lenticular lens sheet having a light-shielding layer and the method for producing the same according to the present invention basically have the above-mentioned contents. However, (1) a hard coat is further performed on the side having the light-shielding layer, (2) (3) An anti-glare coating is applied. (4) An additional layer such as an antistatic coating may be laminated, and a process therefor may be performed. These (1)-
The lamination and processing of the layer (4) may be performed directly,
It may be performed by a method of coating and attaching to another transparent film.

[0035]

EXAMPLE 1 Using the apparatus shown in FIG. 3, a 75 μm thick polyethylene terephthalate resin film was used as a substrate 6, and an ultraviolet-curable resin composition 7 a was supplied from a dispenser 33. A lenticular lens sheet 2 in which a lenticular lens layer 7 in which lenticular lenses having a pitch of 130 μm and a height of about 45 μm are densely arranged is laminated on one surface of the lenticular lens layer 7.

On the side of the lenticular lens sheet 2 where the lenticular lens layer 7 is not laminated, a dry film for a positive resist having a thickness of 5 μm (manufactured by Tokyo Ohka Kogyo Co., Ltd., product number: P-RZ30) is rolled. After pressing and laminating, the substrate was exposed to ultraviolet light from the lenticular lens layer 7 side. After exposure, the exposed portion is dissolved and removed by immersing it in a 1% aqueous solution of sodium carbonate for 1 minute, and then washed and dried to remove the dry film of the light-collecting portion of each lenticular lens of the lenticular lens layer 7. As a result, an intermediate was obtained in which the dry film in the non-light-collecting portion became convex.

As a thermal transfer sheet, a silicone-treated layer on the back of a polyethylene terephthalate resin film having a thickness of 4.5 μm, a wax layer (release layer) having a thickness of 0.3 μm on the front, and carbon black 50 having a thickness of 0.5 μm.
% And a polyester resin layer (thermosensitive adhesive layer) having a thickness of 0.5 μm are sequentially laminated on the intermediate dry film projections described above. Transfer was performed at a temperature of 90 ° C. to form a light-shielding layer.

(Example 2) The same lenticular lens sheet 2 as in Example 1 was used, and a black positive resist ink (manufactured by Fuji Rex Co., Ltd., product name) was provided on the side where the lenticular lens layer 7 was not laminated. ; DANRE
X) was applied to form a black resist film having a thickness of 2 μm and an optical transmission density of 2.5, and then exposed to ultraviolet light from the lenticular lens layer 7 side. After the exposure, the resist film is immersed in the developer for the resist film for 30 seconds, wiped with a cloth to remove the resist film in the exposed portion, and then washed with water and dried to obtain a lenticular lens sheet having a black light-shielding layer. Was.

(Example 3) The same lenticular lens sheet 2 as in Example 1 was used. On the side where the lenticular lens layer 7 was not laminated, a negative-type transparent resist dry film (Nichigo Morton, Product No;
NCP-315) was laminated by pressing with a roller, and then exposed to ultraviolet light from the lenticular lens layer 7 side.

The development is carried out by showering with a 1% aqueous solution of sodium carbonate for 1 minute, followed by washing with water and drying. The exposed portion of the lenticular lens becomes a convex portion, and the unexposed portion has a depth of about 20 μm. A recessed intermediate was obtained. The formed concave portion was filled with an acrylic resin-based flexographic printing ink (black) to form a light-shielding layer having a thickness of about 5 μm and an optical transmission density of 2.

[0041]

According to the first aspect of the present invention, since a light-shielding layer having an optical transmission density of 2 or more is provided, reflection of external light on the light-shielding layer side can be reduced, and a Fresnel lens is provided. In combination with the above, it is possible to provide a lenticular lens sheet having a light-shielding layer, which can constitute a transmission screen having improved image contrast. According to the second aspect of the present invention, the same effect as that of the first aspect of the invention is obtained, and the optical transmission density of the light-shielding layer is increased by interposing a layer made of a resin containing no light-shielding colorant. It is possible to provide a suitable lenticular lens sheet having a light-shielding layer. According to the third aspect of the invention, it is possible to provide a lenticular lens sheet having a light-shielding layer and having substantially the same effects as the second aspect of the invention. According to the fourth aspect of the present invention, the transparent resin layer is laminated on the light-collecting portion of the lenticular lens, and the light-shielding layer is filled and laminated in the recesses between the transparent resin layers. Because it does not protrude from the layer, the light-shielding layer is hardly damaged, and the position where the light-shielding layer should be formed is determined by the position of the concave portion, so that the accuracy of the position where the light-shielding layer is formed is high, A lenticular lens sheet having a light-shielding layer can be provided. Claim 5
According to the invention, in addition to the effects of any one of claims 1 to 4, the lenticular lens sheet can be easily formed into a lens shape by solidifying liquid transparent resin using a transparent sheet. A lenticular lens sheet having a light-shielding layer can be provided. According to the invention of claim 6, the non-lens surface side of the lenticular lens sheet contains a light-shielding colorant and a photosensitive resin,
By laminating layers of the resin composition having an optical transmission density of 2 or more, exposing using a lenticular lens, and then developing, a means for aligning the opaque layer to be formed and the lenticular lens is required. Without this, it is possible to provide an efficient method for producing a lenticular lens sheet having a light-shielding layer, which can provide a product having excellent positional accuracy. According to the invention of claim 7, in addition to the effect of the invention of claim 6, since the photosensitive resin is a positive type, the light-shielding layer, which facilitates removal of the resin composition at the light-collecting portion of the lenticular lens, The present invention can provide an efficient method for producing a lenticular lens sheet having the same. According to the eighth aspect of the present invention, the step of partitioning the portion where the light-shielding layer is formed and the step of forming the light-shielding layer are separated and the number of steps is increased. The use of a photosensitive transparent resin layer without an agent makes it possible to improve the efficiency of exposure, and in the latter step, a high concentration of the light-shielding colorant in the composition forming the light-shielding layer is achieved. Therefore, it is possible to provide an efficient method for producing a lenticular lens sheet having a light-shielding layer, which enables formation of a light-shielding layer having a high optical transmission density. According to the ninth aspect of the present invention, the method of forming the light-shielding layer has the same effect as that of the eighth aspect, and the method of partitioning the portion where the light-shielding layer is formed is the formation of the light-shielding layer. The present invention provides an efficient method for producing a lenticular lens sheet having a light-shielding layer, which can be performed by filling a light-shielding resin composition into a lenticular lens sheet having a light-shielding layer. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a transmission screen.

FIG. 2 is a diagram of a lenticular lens sheet having a light-shielding layer according to the present invention.

FIG. 3 is a view illustrating a method of manufacturing a lenticular lens sheet.

FIG. 4 is a diagram illustrating a manufacturing process using a photosensitive resin.

FIG. 5 is a diagram showing an example in which a lenticular lens layer sheet is reinforced.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 lenticular lens sheet having light-shielding layer 2 lenticular lens sheet 3 lenticular lens group (3a; lenticular lens) 4 light-shielding layer 5 transparent resin layer 6 transparent film 7 ultraviolet curable resin composition 8 photosensitive resin layer 9 exposure Light 10 Transmissive screen 11 Fresnel convex lens 12 Lenticular lens sheet 13 Lenticular lens 14 Light shielding layer 15 Light transmissive sheet or plate 16 Adhesive layer 20 Incident light 21 Parallel light

Claims (9)

[Claims] 1. A lenticular lens sheet composed of a transparent sheet having a lenticular lens group having a plurality of lenticular lenses arranged on one surface is shielded from light on a second surface of the lenticular lens sheet around a non-condensing portion of the lenticular lens. A lenticular lens sheet comprising a light-shielding layer having a light-transmitting density of 2 or more and comprising a light-shielding resin composition containing a coloring agent and a resin. 2. A lenticular lens sheet composed of a transparent sheet having a lenticular lens group in which a plurality of lenticular lenses are arranged on one surface is shielded from light on a second surface of the lenticular lens sheet around a non-condensing portion of the lenticular lens. A light-shielding layer comprising a light-shielding resin composition containing a light-shielding colorant and a resin, wherein the light-shielding layer having an optical transmission density of 2 or more is laminated via a layer made of a resin not containing the light-shielding colorant. Lenticular lens sheet. 3. A lenticular lens sheet composed of a transparent sheet having a lenticular lens group in which a plurality of lenticular lenses are arranged on one surface is provided on the other surface of the lenticular lens sheet with the non-light-collecting portion of the lenticular lens as a center. A light-shielding layer having an optical transmission density of 2 or more is formed, in which at least the side opposite to the lenticular lens sheet side of the layer mainly composed of resin is colored by a light-shielding colorant. Lenticular lens sheet. 4. A lenticular lens sheet composed of a transparent sheet having a lenticular lens group having a plurality of lenticular lenses arranged on one surface, and a transparent resin on the other surface of the lenticular lens sheet centering on a light-collecting portion of the lenticular lens. By the layer being laminated, the portion where the transparent resin layer is not laminated forms a concave portion,
A lenticular lens sheet, characterized in that the concave portion is filled with a light-shielding resin composition containing a light-shielding colorant and a resin, so that a light-shielding layer having an optical transmission density of 2 or more is laminated. 5. The lenticular lens sheet according to claim 1, wherein a lenticular lens layer in which the lenticular lens group is formed on a surface of a lenticular lens forming resin layer is laminated on a transparent film. The lenticular lens sheet according to any one of claims 1 to 4. 6. A lenticular lens sheet comprising a transparent sheet having a lenticular lens group having a plurality of lenticular lenses arranged on one surface, the other surface of the lenticular lens sheet containing a light-shielding colorant and a photosensitive resin, After laminating a layer of a resin composition having a uniform thickness with an optical transmission density of 2 or more, exposure is performed from the side having the lenticular lens group of the lenticular lens sheet, and development is performed after the exposure. Of the light-collecting portion and the non-light-collecting portion of the lenticular lens at the time, the layer of the resin composition is removed at the light-collecting portion, and the light-shielding made of the cured resin composition at the non-light-collecting portion A method for producing a lenticular lens sheet having a light-shielding layer, comprising forming a conductive layer. 7. The light-shielding property according to claim 6, wherein the photosensitive resin is a positive type, and a layer of the resin composition in a light collecting portion of the lenticular lens at the time of exposure is removed by development. A method for producing a lenticular lens sheet having a layer. 8. A lenticular lens sheet composed of a transparent sheet having a lenticular lens group in which a plurality of lenticular lenses are arranged on one surface, and a transparent resin having a uniform thickness and a positive photosensitive property on the other surface. After stacking the layers, exposure is performed from the side having the lenticular lens group of the lenticular lens sheet, and development is performed after exposure, so that the light-collecting portion and the non-light-collecting portion of the lenticular lens at the time of exposure are exposed. Among them, while removing the transparent resin layer in the light-collecting portion, and leaving the transparent resin layer in the non-light-collecting portion, on the remaining transparent resin layer, a light-shielding colorant and a resin The optical transmission density of the light-shielding resin composition containing the laminated light-shielding layer of 2 or more, or the transparent resin layer remaining in the non-light-collecting portion, A method for producing a lenticular lens sheet having a light-shielding layer, characterized by coloring with a light-shielding colorant so that the optical transmission density becomes 2 or more. 9. A lenticular lens sheet composed of a transparent sheet having a lenticular lens group having a plurality of lenticular lenses arranged on one surface, and a transparent resin having a uniform thickness and a negative photosensitive property on the other surface. After stacking the layers, exposure is performed from the side having the lenticular lens group of the lenticular lens sheet, and development is performed after exposure, so that the light-collecting portion and the non-light-collecting portion of the lenticular lens at the time of exposure are exposed. Of these, while leaving the transparent resin layer in the light-collecting portion and removing the transparent resin layer in the non-light-collecting portion, a concave portion formed of the transparent resin layer removed portion is formed in the non-light-collecting portion. Thereafter, the concave portion is selectively filled with a light-shielding resin composition containing a light-shielding colorant and a resin, whereby the optical transmission density is increased. A method for producing a lenticular lens sheet having a light-shielding layer, wherein a light-shielding layer having a degree of 2 or more is formed.