JP2000147215A - Lenticular lens sheet and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lenticular lens sheet capable of ensuring good contrast and diffusing property by forming an accurate light absorption layer whose registration is matching fine pitch light incident lenses. SOLUTION: The lenticular lens sheet 20 has a film substrate 21, plural light incident lenses 22 arranged on the light incident side of the substrate 21 and black stripes 23 disposed over part of the surface of the substrate 21 of the light emergent side avoiding the light converging regions of the light incident lenses 22. A positive type resist layer comprising a light shielding positive type resist material is formed on the light emergent side of the surface of the substrate 21, exposed to the light coming from the incident side of the substrate 21 through the light incident lenses 22 and developed to form the black stripes 23. Light diffusion stripes 26 are disposed over the light converging regions of the light incident lenses 22 on the light emergent side of the substrate 21 so that the stripes 26 abut on the black stripes 23.

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 constituting a transmissive screen used in a rear projection type projection television or the like, and in particular, a light-shielding pattern (black stripe) in the form of a stripe is provided on the light emitting side surface. The present invention relates to a lenticular lens sheet and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, three CRs of red, green and blue have been used.
2. Description of the Related Art A rear-projection projection television including a light source composed of a T (Cathode Ray Tube) and a transmissive screen for projecting an image from the light source is known. Of these, a transmissive screen is generally a Fresnel lens A combination of a sheet and a lenticular lens sheet is used. Here, as such a lenticular lens sheet, a film-shaped substrate provided with a plurality of light-entering lenses on the light-entering side (hereinafter, “film substrate”)
In general, a black stripe is provided in a region other than the converging region of each light-entering lens on the light-emitting side of the light-exiting side. The contrast can be improved by reducing the influence of light.

In such a projection television, instead of a CRT, an LCD (Liquid Cry) is used.
stal Display) and DMD (Digital Micro-mirror Devic)
Light sources using light sources such as e) have also been developed and are being widely used in fields such as data projectors, computer monitors, and digital television broadcasting. However, in a projection television using an LCD, a DMD, or the like as a light source, a lattice pattern due to a cell structure of the LCD, a DMD, or the like is projected on a transmission screen, so that the light is projected on a lenticular lens sheet having a periodic structure. When an image is projected and observed, moire may occur due to the sampling effect of the lenticular lens sheet.

For this reason, in a projection television using an LCD, a DMD, or the like as a light source, a lens pitch of 0.6 to 1.0 mm, which has been generally used in the past, is used in order to effectively reduce the occurrence of moire. In place of the lenticular lens sheet, a lenticular lens sheet having a small lens pitch of 0.2 mm or less has been required. In the lenticular lens sheet described above, as the lens pitch decreases, the pitch of the black stripe provided on the light-emitting side surface of the film substrate also decreases.

In such a lenticular lens sheet having a small lens pitch, as a method of forming a black stripe having a small pitch as described above, a black stripe pattern is printed directly on the light-emitting side surface of the lenticular lens sheet. In addition to the method, using a photolithography method, the resist material (resist layer) formed on the light emitting side surface of the film substrate is exposed through each light incident lens provided on the light incident side of the film substrate. In addition, a method of forming a high-definition pattern of a black stripe by developing has been widely used.

In such a lenticular lens sheet, it is necessary to impart some diffusion characteristics to the lenticular lens sheet in order to prevent the image flicker called scintillation. Other than the method of mixing a diffusing agent into the entire film substrate of the lenticular lens sheet,
A method of providing a light diffusion layer having a predetermined thickness as a part of a lenticular lens sheet has been proposed. From the viewpoint of preventing a decrease in gain, a decrease in resolution, and the like, the latter method has been widely used at present.

In such a situation, in a lenticular lens sheet provided with a light diffusion layer having a predetermined thickness, a resist layer provided on the light-emitting side is exposed and developed from the light-entering side of the film substrate to form a black stripe. There have been proposed various methods for forming the above-mentioned pattern (Japanese Patent Application Laid-Open Nos. 2-135431 and 9-2695).
46, JP-A-9-120101 and JP-A-10-83029.

[0008]

However, of the above-mentioned conventional methods, the methods described in JP-A-2-135431 and JP-A-9-269546 disclose a method for forming a resist layer on a lenticular lens sheet. Since the light diffusion layer exists on the inside, when the resist layer is exposed by irradiating parallel light from the light incident side of the film substrate in the exposure step, the parallel light is emitted by the light diffusion layer provided inside the resist layer. As a result, the pattern of the black stripe is not uniform, and therefore, there is a problem that an accurate black stripe matching the registration with each of the finely pitched light-entering lenses cannot be formed.

On the other hand, in the methods described in JP-A-9-120101 and JP-A-10-83029, the light diffusion layer is formed outside the resist layer in the lenticular lens sheet. JP-A-2-135431 and JP-A-9-269.
No problem as in the method described in Japanese Patent No. 546 is produced, but there is a problem that the contrast is reduced because the light diffusion layer is directly formed on the black stripe provided on the light exit side of the film substrate. .

The present invention has been made in view of the above points, and an accurate light absorption layer which is registered with each of the finely pitched light-entering lenses is formed. An object of the present invention is to provide a lenticular lens sheet capable of obtaining diffusion characteristics and a method for manufacturing the same.

[0011]

A first feature of the present invention is as follows.
A film-shaped base, a plurality of light-entering lenses provided on the light-entering side of the base, and a light-exiting surface provided on the light-exiting side of the base other than the converging area of each light-entering lens. Light absorbing layer, and a light diffusion layer provided so as to be adjacent to the light absorbing layer in the condensing area of each of the light incident lenses on the light exit side surface of the base material. Is a lenticular lens sheet.

A second feature of the present invention is that a light-shielding positive type resist layer is formed on a light-emitting side surface of a film-like substrate provided with a plurality of light-entering lenses on a light-entering side; Exposing the positive resist layer from the light incident side of the base material through each light incident lens, and developing the positive resist layer to form a positive resist material in an exposed region of the positive resist layer. Forming a light-absorbing layer in a region other than the converging region of each of the light-entering lenses on the light-emitting side surface of the substrate by removing and leaving a positive resist material in an unexposed region; Forming a light diffusion layer in the light-collecting area of each light-entering lens on the light-emitting side surface of the substrate by applying a resin mixed with a diffusing agent to the exposed area from which the material has been removed; And a wrench characterized by including A Interview color lens sheet manufacturing method of.

[0013] A third feature of the present invention is that a light-transmitting positive resist layer is formed on a light-emitting side surface of a film-like substrate provided with a plurality of light-entering lenses on a light-entering side; Exposing the positive resist layer from the light incident side of the substrate through each of the light incident lenses, and developing the positive resist layer to form a positive resist material in an exposed region of the positive resist layer Removing the positive resist material in the unexposed areas as protrusions, and applying a colored ink on the protrusions to collect the light-receiving lenses of the light-emitting lenses on the light-emitting side surface of the base material. Forming a light absorbing layer in a region other than the region, and applying a resin mixed with a diffusing agent to the exposed region from which the positive resist material has been removed. Focusing area of each of the light incident lenses A method for producing a lenticular lens sheet, which comprises a step of forming a light diffusion layer.

A fourth feature of the present invention is that a negative resist layer is formed on a light-emitting side surface of a film-like substrate provided with a plurality of light-entering lenses on a light-entering side; Exposing the negative resist layer from the light incident side of the substrate via a lens, and removing the negative resist material in the unexposed areas of the negative resist layer by developing the negative resist layer And applying a colored ink to the unexposed areas from which the negative resist material has been removed, so that light is emitted to areas other than the light-collecting areas of the light-entering lenses on the light-emitting side surface of the base material. Forming an absorption layer, removing the negative resist layer left in the exposed region without removing the negative resist material, and exposing the light emitting side surface of the base material, The exposure in which is removed Forming a light diffusion layer in the light condensing area of each of the light incident lenses on the light emitting side surface of the base material by applying a resin mixed with a diffusing agent to the region. This is a method for producing a lenticular lens sheet.

According to the first to fourth features of the present invention, after a light absorbing layer is formed on the light emitting side surface of a film-shaped substrate, the light emitting side of the substrate on which the light absorbing layer is formed is formed. Since the light diffusion layer is provided so as to be adjacent to the light absorption layer in the condensing area of each light incident lens on the surface, exposure and development of the resist layer can be performed without interposing the light diffusion layer. No light diffusion layer is provided directly on the light absorption layer. For this reason, it is possible to form a lenticular lens sheet that can form an accurate light absorption layer that is registered with each of the finely pitched light-entering lenses and that has good contrast and diffusion characteristics.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views for explaining an embodiment of a lenticular lens sheet and a method of manufacturing the same according to the present invention.

First, a lenticular lens sheet according to the present embodiment will be described with reference to FIG.

As shown in FIG. 1, the lenticular lens sheet 20 includes a film-shaped base (hereinafter referred to as a “film base”) 21 and a plurality of light-entering lenses provided on the light-entering side of the film base 21. 22 and a black stripe (light absorbing layer) 23 provided in a region other than the converging region of each light incident lens 21 on the light exit side surface of the film substrate 21. Among them, the black stripe 23 is formed by a light-shielding positive resist layer formed of a light-shielding positive resist material formed on the light-emitting side surface of the film It can be formed by exposing and developing from the side. That is, the black stripe 23 exposes the light-emitting side surface of the film substrate 21 in the light-converging region of each light-entering lens 22, and the positive resist material in the region other than the light-converging region of each light-entering lens 22. Is left as a light-shielding projection.

A light diffusion layer 26 is provided in the light condensing area of each light incident lens 22 on the light exit side surface of the film substrate 21 so as to be adjacent to the black stripe 23. The light diffusion layer 26 can be formed by applying a resin mixed with a diffusing agent to an exposed region from which the positive resist material has been removed by a wiping method or the like.

FIG. 2 is a view showing a modification of the lenticular lens sheet shown in FIG. As shown in FIG. 2, a transparent adhesive layer 25 is formed on the black stripe 23 and the light diffusion layer 26 by laminating or coating, and a plate substrate 30 having a predetermined thickness is laminated via the adhesive layer 25. It is good to process. In addition, an anti-reflection layer, a low-reflection layer, an anti-scratch layer (hard coat layer), an anti-static layer, an anti-glare layer (anti-glare layer), and contamination prevention are provided on the light-emitting side (observation-side surface) of the plate substrate 30. It is preferable to provide a surface treatment layer 31 such as a layer, a polarization filter layer, an electromagnetic wave shielding layer, and a touch sensor functional layer.

Next, a method of manufacturing the lenticular lens sheet according to the present embodiment having such a configuration will be described with reference to FIG.

First, in the step (A), a radiation curable resin is applied on the roll surface of the molding roll 3 by the coating unit 4, and the nip roll 5 is applied to the molding roll 3 coated with the radiation curable resin. Then, the film substrate 21 supplied from the paper feed roll 2 is nipped. afterwards,
While the surface of the film substrate 21 (the surface on which the radiation-curable resin is applied) is in contact with the molding roll 3, the radiation lamp 6 irradiates radiation from the back side of the film substrate 21 to produce radiation-curable resin. The resin is cured, and the film substrate 21 is cured.
A plurality of light incident lenses 22 are formed on the light incident side surface of. The film substrate 21 on which the light-entering lens 22 is formed in this manner is released from the molding roll 3 by the release roll 7, and is conveyed to the next step.

Next, in the step (B), the light incident lens 2
The light-shielding positive resist dry film 23 ′ supplied by the paper feed roll 10 is laminated on the light-emitting side surface of the film base 21 on which the molded base 2 has been formed by the pressing roll 11, and the film base 21 is formed. A positive-type resist layer is formed on the light-emitting side of the substrate. The peel P adhered to the back surface of the positive resist dry film 23 'was used.
The ET (polyethylene terephthalate) 23 ″ is released by the release roll 12 and then discharged by the paper discharge roll 13.

Then, in this step (B), the exposure light (parallel light) emitted from the exposure device 14 is irradiated on the film substrate 21, and each of the light incident on the light incident side of the film substrate 21 is provided. The positive type resist layer formed on the light emitting side surface of the film substrate 21 is exposed through the optical lens 22.

Thereafter, in the step (C), the exposed positive resist layer provided on the light-emitting side surface of the film substrate 21 is developed by the developing / washing unit 15, and then the developed positive resist layer is developed. The positive resist material in the exposed area (uncured area) of the layer is washed and removed, and then dried by the drying unit 16. This allows
Only the positive resist material in the unexposed area (cured area) is left as a light-blocking projection, and the black stripe 23 is formed on the light-emitting side surface of the film substrate 21 in a region other than the converging region of each light-entering lens 22. Is formed.

In the step (D), the diffusion resin coating unit 1 is applied to the light emitting side surface of the film substrate 21 on which the black stripes 23 are formed in this manner.
7 is applied with a resin mixed with a diffusing agent, subjected to wiping processing, and dried by the drying unit 18, so that the area between the projections forming the black stripes 23 on the light emitting side surface of the film substrate 21 ( The light diffusion layer 26 is formed on the light converging region of each light incident lens 22).

Finally, the film substrate 21 on which the light incident lens 22, the black stripe 23 and the light diffusion layer 26 are formed is wound up by the paper discharge roll 19, and the lenticular lens as shown in FIG. A sheet 20 is obtained.

In order to obtain the lenticular lens sheet 20 shown in FIG. 2, following the step (D), the black stripe 23 and the light diffusion layer 26 formed on the light emitting side surface of the film substrate 21 are formed. The transparent adhesive layer 25 is formed by laminating or coating, and a plate base 30 of a predetermined thickness is laminated on the adhesive layer 25. Then, the surface of the plate base 30 on the light emitting side (observation side surface) The surface treatment layer 31 having the function described above is formed by laminating or the like.

As described above, according to the present embodiment, the light-shielding positive resist layer formed on the light-emitting side surface of the film base 21 is exposed and developed to form the black stripe 2.
After the formation of the black stripes 23, the light diffusion layer 26 is provided in a region between the projections forming the black stripes 23 on the light emitting side surface of the film base 21 on which the black stripes 23 are formed. Exposure and development can be performed without interposing a light diffusion layer, and a light diffusion layer is not directly provided on a black stripe. Therefore, an accurate black stripe 23 that is registered with each of the finely pitched light-entering lenses is formed, and excellent contrast and diffusion characteristics can be obtained.

In the above-described embodiment, the resist material is supplied in the form of a dry film, and the resist material is laminated on the light emitting side surface of the film substrate 21. However, the present invention is not limited to this. The resist resin may be coated on the light emitting surface of the film substrate 21.

In the above-described embodiment, a light-shielding positive resist material is used as a resist material. However, the present invention is not limited to this, and a light-transmitting positive resist material or a negative resist material may be used. It is also possible.

Here, when a light-transmitting positive resist material is used as the resist material, for example, in the step (B), the positive resist supplied as a light-transmitting positive resist dry film is used. The layer is exposed, and in the step (C), the positive resist material in the exposed area (uncured area) of the developed positive resist layer is washed and removed, and the positive resist material in the unexposed area is projected. By applying colored ink such as black ink on the remaining protrusions, black stripes are formed on the light exit side surface of the film substrate 21 in regions other than the light converging regions of the light incident lenses 22. 23 may be formed.

When a negative resist material is used as the resist material, for example, in the step (B), the negative resist layer supplied as the dry film for the negative resist is exposed to light, )
The negative resist material in the unexposed areas (uncured areas) of the developed negative resist layer is washed and removed, and the unexposed areas from which the negative resist materials have been removed are black ink-coated by a wiping method or the like. The area between the negative resist layers left on the light emitting side surface of the film substrate 21 is filled with the coloring ink by applying a coloring ink such as Optical lens 2
It is preferable to form the black stripe 23 in a region other than the light-collecting region 2. The negative resist layer left in the exposed region of the light emitting side surface of the film substrate 21 is finally peeled off (removed), and the portion of the light emitting side surface of the film substrate 21 other than the black stripe 23 is removed. Is exposed.

[0034]

Next, a specific example of the above-described embodiment will be described. Example 1 Example 1 corresponds to the case where a black stripe is formed using a light-shielding positive resist material in the above-described embodiment.

First, a radiation-curable resin (HRF2535, manufactured by Inktec Co., Ltd.) is applied onto the roll surface of a molding roll by nozzle coating from a coating unit. Using a nip roll, a film substrate (A-4100, manufactured by Toyobo Co., Ltd., thickness: 188 μm) supplied from the paper feed roll along the forming roll was nipped. Then, while the surface of the film substrate (the surface to which the radiation-curable resin is applied) is in contact with the molding roll, the radiation-curable resin is irradiated by radiation from the back side of the film substrate by a radiation lamp. After curing, a film substrate having a plurality of light-entering lenses formed on the light-incident side surface was formed.

Then, a black positive resist dry film (PR-R, manufactured by Tokyo Ohkasha Co., Ltd.) was applied to the light-emitting side surface of the thus obtained film substrate with a light-entering lens.
Z30, thickness 15 μm) were laminated by a pressing roll (upper and lower rolls) to form a light-shielding positive resist layer on the light-emitting side surface of the film substrate. The lamination conditions were as follows: lamination speed: 1 m / min, lamination pressure: 2 kg, lamination temperature: 9
0 ° C.

Each of the light-entering lenses provided on the light-entering side of the film substrate with the exposure light beam emitted from the exposure device is applied to the thus obtained film substrate with a positive resist layer. Exposure was carried out. The exposure condition was 75 mJ in terms of the integrated light amount. By such exposure, the positive resist layer was in an uncured state in the light-converging area (exposure area) of the light-entering lens, and remained in a hardened state in the non-light-condensing area (unexposed area).

Thereafter, the thus-exposed film substrate with an exposed positive resist layer was developed. The development conditions were dipping and brushing development for 1 minute with 1% sodium carbonate. Next, washing was performed for 1 minute with pure water, and after washing, drying was performed for 1 minute. By such development and washing, the positive resist material in the exposed region (uncured region) of the developed positive resist layer is removed, and only the resist material in the unexposed region where the black stripe is to be formed is removed. Since a black projection was left, a black stripe matched with the light-entering lens could be obtained.

Then, a resin mixed with a diffusing agent (manufactured by INTEC: media for a chemical mat varnish) is applied to the light emitting side surface of the film substrate on which the black stripes are formed, and subjected to wiping processing. By drying, a diffusion layer was formed in a region between the protrusions where the black stripes were formed.

Thereafter, a transparent adhesive layer (manufactured by 3M: 9483, thickness: 100 μm) was laminated on the diffusion layer and the black stripe provided on the light emitting side surface of the film substrate thus obtained. .

Then, on the pressure-sensitive adhesive layer thus laminated, a thickness of 1.0 mm manufactured by extrusion molding is applied.
透明 5.0 mm of a transparent plate substrate was laminated. A surface treatment layer having low reflection, antistatic and hard coat functions was laminated on the surface of the plate substrate (observation side surface).

Example 2 Example 2 corresponds to the case where a black stripe is formed using a translucent positive resist material in the above-described embodiment.

First, a film substrate having a plurality of light-entering lenses formed on the light-incident side surface was formed in the same manner as in Example 1 described above.

Next, the transparent positive resist dry film supplied by the paper feed roll is pressed against the light emitting side surface of the thus obtained film substrate with the light incident lens provided with the light input lens (up and down). (A roll) to form a positive resist layer on the light emitting surface of the film substrate. The lamination conditions at this time were a lamination speed of 1 m / min, a lamination pressure of 2 kg, and a lamination temperature of 90 ° C. with upper and lower rolls.

Then, each of the light incident lenses provided on the light incident side of the film substrate with the exposure light emitted from the exposure device is applied to the thus obtained film substrate with the positive resist layer. Exposure was carried out. The exposure condition was 180 mJ in terms of the integrated light amount. By such exposure, the positive resist layer was in an uncured state in the light-converging area (exposure area) of the light-entering lens, and remained in a hardened state in the non-light-condensing area (unexposed area).

Thereafter, the exposed film substrate with a positive resist layer thus obtained was developed. The development conditions were dipping and brushing development for 1 minute with 1% sodium carbonate. Next, washing was performed for 1 minute with pure water, and after washing, drying was performed for 1 minute. By such development and washing, the positive resist material in the exposed region (uncured region) of the developed positive resist layer is removed, and the unexposed region (cured region) where the black stripe is to be formed is formed. Since only the resist material was left as a protrusion, a black stripe shape matched with the light-entering lens could be obtained.

Then, the black ink is applied to the protrusions left on the light-emitting side surface of the film substrate in this manner and dried, and the collection of each light-entering lens on the light-emitting side surface of the film substrate is performed. A black stripe was formed in an area other than the light area. Further, a resin mixed with a diffusing agent is applied to the surface on the light emitting side of the film substrate on which the black stripes are formed, and wiping is performed, followed by drying. A light diffusion layer was formed in a region between the portions.

Thereafter, a transparent adhesive layer (manufactured by 3M: 9483, thickness: 100 μm) was laminated on the light-emitting side surface and the black stripe of the film substrate thus obtained.

Then, on the pressure-sensitive adhesive layer laminated as described above, a thickness of 1.0
透明 5.0 mm of a transparent plate substrate was laminated. A surface treatment layer having low reflection, antistatic and hard coat functions was laminated on the surface of the plate substrate (observation side surface).

Example 3 Example 3 corresponds to the case where a black stripe is formed using a negative resist material in the above-described embodiment.

First, a film substrate having a plurality of light-entering lenses formed on the light-entering surface was formed in the same manner as in Example 1 described above.

Next, a dry film for negative resist supplied by a paper feed roll (manufactured by Nichigo Morton Co., Ltd.) was applied to the light-emitting side surface of the thus obtained film substrate with a light-entering lens. NCP-315, thickness 15 μm,
(A resolution of 10 μm) was laminated by a pressing roll (upper and lower rolls) to form a negative resist layer on the light emitting side surface of the film substrate. The lamination conditions at this time were as follows: lamination speed: 1 m / min, lamination pressure: 2 k
g, the laminating temperature was 90 ° C. with the upper and lower rolls.

The thus obtained film substrate with a negative resist layer was provided on the light incident side of the film substrate by exposure light (parallel light) emitted from an exposure device. Exposure was performed through each light entrance lens.
The exposure condition was 75 mJ in terms of the integrated light amount. In addition,
As a result of such exposure, the negative resist layer remained in a hardened state in the light-converging region (exposed region) of the light-entering lens, and was in an uncured state in the non-light-condensing region (unexposed region).

Thereafter, the exposed film substrate with a negative resist layer thus obtained was developed. The developing condition was a showering development for 1 minute with 1% sodium carbonate. Next, washing was performed for 1 minute with pure water, and after washing, drying was performed for 1 minute. By such development and washing, the negative resist material in the unexposed area (uncured area) where the black stripe is to be formed in the developed negative resist layer is removed, and the exposed area (cured area) is removed. Since the negative resist material was left as a protruding portion, a black stripe shape matched with the light incident lens and registration could be obtained as a concave shape.

Then, the black ink is applied to the light-emitting side surface of the film substrate in this manner, wiped, and dried, so that the protrusions (negative parts) left on the light-emitting side surface of the film substrate are removed. The black ink is filled in the area between the mold resist layers (the area corresponding to the black stripe shape), and black stripes are formed on the light-emitting side surface of the film substrate in areas other than the condensing area of each light-entering lens. did.

Thereafter, a black stripe is formed on the light-emitting side surface of the film substrate, and then the light-emitting surface of the film substrate on which the black stripe is formed is
After performing a resist stripping treatment with a 3% alkaline aqueous solution for about 1 to 2 minutes, the film is washed with pure water for 1 minute, and a negative resist material (protruding portion) left on the light-emitting side surface of the film base material ) Was peeled off to expose portions other than the black stripes on the light emitting side surface of the film substrate.

Then, a resin mixed with a diffusing agent (manufactured by INTEC: media for chemical mat varnish) is applied to the light emitting side surface of the film substrate on which the black stripes are formed as described above, and subjected to wiping processing. By drying, a diffusion layer was formed in a region between the protrusions where the black stripes were formed.

Thereafter, a transparent adhesive layer (manufactured by 3M: 9483, thickness: 100 μm) was laminated on the diffusion layer and the black stripe provided on the light emitting side surface of the film substrate thus obtained. .

Then, on the pressure-sensitive adhesive layer laminated as described above, a thickness of 1.0
透明 5.0 mm of a transparent plate substrate was laminated. A surface treatment layer having low reflection, antistatic and hard coat functions was laminated on the surface of the plate substrate (observation side surface).

Evaluation Results As a result of manufacturing lenticular lens sheets according to the manufacturing methods of Examples 1 to 3 described above, any of the lenticular lens sheets manufactured as described above shows that:
Accurate black stripes were formed in registration with each of the finely pitched light-entering lenses, and good contrast and diffusion characteristics were obtained.

[0061]

As described above, according to the present invention, an accurate light absorbing layer which is registered with each of the finely pitched light-entering lenses is formed, and good contrast and diffusion characteristics are obtained. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram showing a lenticular lens sheet according to an embodiment of the present invention.

FIG. 2 is a view showing a modification of the lenticular lens sheet shown in FIG. 1;

FIG. 3 is a view for explaining an embodiment of a method for manufacturing a lenticular lens sheet according to the present invention.

[Explanation of symbols]

 2 Feed Roll (for Film Substrate) 3 Forming Roll 4 Coating Unit 5 Nip Roll 6 Radiation Lamp 7 Release Roll 10 Feed Roll (for Resist Dry Film) 11 Press Roll 12 Release Roll 13 Discharge Roll 14 Exposure Device 15 Developing / Washing Unit 16, 18 Drying Unit 17 Diffusion Resin Coating Unit 19 Discharge Roll 21 Film Base 22 Light Input Lens 23 Black Stripe (Light Absorbing Layer) 25 Adhesive Layer 26 Light Diffusion Layer 30 Plate Base 31 Surface Treatment layer

Continued on the front page F-term (reference) 2H021 BA23 BA26 BA28 BA32 2H042 AA03 AA20 AA28 BA04 BA12 BA14 BA15 BA19 4F213 AA44 AG03 AH73 WA06 WA58 WA86 WA87 WB01

Claims (11)

[Claims] 1. A film-shaped base material, a plurality of light-entering lenses provided on the light-entering side of the base material, and a light-exiting surface of the base material other than a converging area of each of the light-entering lenses. A light-absorbing layer provided in a region of the substrate, and a light-diffusing layer provided so as to be adjacent to the light-absorbing layer in a light-collecting region of each of the light-entering lenses on the light-emitting side surface of the base material. A lenticular lens sheet comprising: 2. The light-absorbing layer is formed by exposing and developing a resist layer formed on the light-emitting side surface of the substrate from the light-entering side of the substrate through each of the light-entering lenses. The lenticular lens sheet according to claim 1, wherein: 3. The light-shielding positive type resist material, wherein the light-exiting surface of the base material is exposed in a light-converging region of each of the light-entering lenses, The lenticular lens sheet according to claim 2, wherein the positive resist material is left as the light absorbing layer in a region other than the light focusing region. 4. The light-transmitting positive resist material, wherein the light-exiting surface of the base material is exposed in the light-converging area of each of the light-entering lenses, and each of the light-entering lenses is formed. 3. The lenticular according to claim 2, wherein the positive resist material is left as a protruding portion in a region other than the light converging region, and the light absorbing layer is formed on the remaining protruding portion. Lens sheet. 5. The method according to claim 1, wherein the resist layer is made of a negative resist material, and after a light absorbing layer is formed in a region other than the negative resist material left in the light-collecting region of each of the light-entering lenses, The lenticular lens sheet according to claim 2, wherein the negative resist layer left in the light-converging region of the optical lens is removed. 6. The lenticular lens sheet according to claim 1, wherein a plate base material having a predetermined thickness is provided on the light emitting side of said base material. 7. The lenticular lens sheet according to claim 1, wherein a surface treatment layer is provided on a surface layer on the light emission side of the base material. 8. The surface treatment layer comprises an antireflection layer, a low reflection layer,
The lenticular lens according to claim 7, further comprising at least one of a damage prevention layer, an antistatic layer, an antiglare layer, a pollution prevention layer, a polarizing filter layer, an electromagnetic wave shielding layer, and a touch sensor function layer. Sheet. 9. A step of forming a light-blocking positive resist layer on a light-exiting surface of a film-like base material provided with a plurality of light-entering lenses on the light-entering side; Exposing the positive resist layer from the light incident side of the base material, and developing the positive resist layer to remove the positive resist material in the exposed areas of the positive resist layer and unexposed areas Forming a light-absorbing layer in a region other than the converging region of each of the light-entering lenses on the light-emitting side surface of the substrate by leaving the positive-type resist material; and exposing the positive-type resist material to light. Forming a light diffusion layer in the condensing area of each of the light incident lenses on the light emitting side surface of the base material by applying a resin mixed with a diffusing agent to the region. Lenticular lens sheet Manufacturing method. 10. A step of forming a light-transmitting positive resist layer on the light-emitting side surface of a film-like base material provided with a plurality of light-entering lenses on the light-entering side; Exposing the positive resist layer from the light incident side of the base material, and removing the positive resist material in the exposed areas of the positive resist layer by developing the positive resist layer and unexposed areas Leaving the positive resist material as a protrusion, and applying a colored ink on the protrusion to absorb light in a region other than the light-collecting region of each of the light-entering lenses on the light-emitting side surface of the base material. Forming a layer, and applying a resin mixed with a diffusing agent to the exposed area from which the positive resist material has been removed, thereby collecting the light-entering lenses on the light-emitting side surface of the base material. Form a light diffusion layer in the light area A method of manufacturing a lenticular lens sheet. 11. A step of forming a negative resist layer on a light-emitting side surface of a film-like base material provided with a plurality of light-entering lenses on a light-entering side; Exposing the negative resist layer from the light incident side of the negative resist layer; developing the negative resist layer to remove a negative resist material in an unexposed area of the negative resist layer; Forming a light-absorbing layer in a region other than the converging region of each of the light-entering lenses on the light-emitting side of the substrate by applying a coloring ink to the unexposed region from which the material has been removed; Removing the negative-type resist layer left in the exposed region without removing the negative-type resist material to expose the light-emitting side surface of the substrate; and exposing the exposed region from which the negative-type resist material has been removed. Spread against Forming a light diffusion layer in the light condensing area of each of the light incident lenses on the light emitting side surface of the base material by applying a resin mixed with a lenticular lens sheet. Method.