KR100860707B1 - Lenticular lens sheet and projection television screen using the same - Google Patents

Abstract

The present invention relates to a lenticular lens sheet, which is one of the components of a projection TV screen in the form of a micro display (MD) such as a liquid crystal display (LCD) and a digital light process (DLP), and a method of manufacturing the same. More specifically, the present invention by introducing a photosensitive adhesive layer in the manufacture of the lenticular lens sheet, by effectively forming the light-shielding portion and the diffusion portion by using the photocurable properties of the photosensitive adhesive layer and the adhesive force change characteristics by photocuring The present invention relates to a method for manufacturing a lenticular lens sheet capable of obtaining excellent contrast characteristics and optical properties, and to a lenticular lens sheet and a projection TV screen prepared as described above.

Lenticular lens, projection TV, photocurable resin, photosensitive adhesive layer, diffusion part, light shielding part

Description

LentICULAR LENS SHEET AND PROJECTION TELEVISION SCREEN USING THE SAME}

1 is a diagram showing a lenticular lens sheet and a filter used in a conventional microdisplay (MD) projection TV.

2 is a view showing a part of a conventional lenticular sheet in which a light shielding part (black) is selectively formed on a non-condensing part of the surface of a photosensitive adhesive layer, and a diffusion layer is adhered in the form of a sheet on the light blocking part.

Figure 3 shows a detailed view of the lenticular lens sheet according to the present invention.

4A to 4K are views illustrating a process of manufacturing a lenticular lens sheet according to an embodiment of the present invention.

The present invention relates to a rear transmissive projection TV screen and a lenticular lens used therein, and more particularly, to a lenticular lens sheet which can be manufactured at low cost compared to the conventional technology, and which can have excellent diffusion characteristics and contrast characteristics. And a method for manufacturing a projection TV screen using the same.

Projection TV is a method of projecting a small image from a light source such as CRT, LCD, Digital Light Processing (DLP) or Liquid Crystal on Silicon (LCoS) through an optical engine and a projection lens to form a desired image on the front of the screen. As a type of large-screen display, the demand for it has recently increased significantly in that a high-quality large screen can be realized. Light sources used in projection TVs include CRT (Cathode Ray Tube), LCD (Liquid Crystal Display), DLP (Digital Light Processing), and the like. It is called MD) light source.

Such a projection TV generally uses a transmissive screen, which is a fresnel lens sheet for condensing light projected by a reflecting mirror and emitted from a light source, and spreads the condensed light toward the viewer to secure a viewing angle. A lenticular lens sheet that plays a role, and a filter that plays a role of diffusion, contamination resistance, and glare prevention while protecting the lenticular lens sheet. A cylindrical lenticular lens portion is disposed on the incident surface side of the lenticular lens sheet, and a light shielding portion, which is a light absorbing layer, is disposed on the emission surface on the viewer side to limit reflection of external light.

Recently, the development of the CRT as a light source of a projection TV has gradually progressed to use a micro display (MD) type light source using an LCD or a DLP or a digital micromirror device (DMD).

Projection TV using such a MD-type light source has an advantage that the brightness and resolution is excellent and can be manufactured thinner than a TV to which the conventional CRT method is applied. However, in the case of a projection TV using an MD type light source, there is an additional moiré generated between the light source pixels such as LCD and DLP and the screen lens pitch, so a lenticular lens with a narrow pitch is required for the solution. In addition, in order to secure a better viewing screen, the improvement of contrast and diffusion efficiency is further required.

In a typical projection TV screen, a light shielding part which secures contrast and exhibits a light shielding effect on external light is disposed on the exit surface side of the lenticular sheet, and the light shielding part is focused through the lenticular lens disposed on the incident surface side. It is formed in the area except the path of light.

In US Patent No. 5870224 or Japanese Patent Laid-Open No. 59-121033 as a method for forming a light shielding part on a lenticular lens sheet for MD, after applying a photoresist having adhesive properties to the exit surface side of the lenticular sheet, parallel By irradiating light to the incident surface side of the lenticular sheet, the light is condensed on the photoresist surface through the lenticular lens to remove the adhesive property of the light condensed portion, and then toner is applied, thereby not completely adhered to the photoresist surface. Disclosed is a method in which a toner is attached to only a portion where light is not collected by removing the toner so that a light shielding portion is formed.

In addition, Japanese Unexamined Patent Publication No. 1997-120102 also discloses that a radiation-sensitive resin is disposed on the exit surface side of the lenticular sheet, and after irradiating light toward the incident surface side of the lenticular sheet, the black paint is applied only to a portion not cured by the light. By placing a radiation-sensitive resin on the exit surface side of the lenticular sheet and the lenticular sheet, attaching a transfer sheet having a black colored layer thereon, irradiating light to the incident surface side of the lenticular sheet, and then removing the transfer sheet. A method is disclosed in which a black colored layer remains only in a portion not cured by the light.

1 and 2 show lenticular lens sheets and filters in screens used in conventional projection TVs formed as described above.

1 and 2, the light shielding part, which is generally black, is selectively formed on the non-condensing part on the surface of the photosensitive adhesive layer, and the diffusion layer which determines the vertical viewing angle and the diffusion is adhered or laminated in the form of a sheet on the black light blocking part. do.

However, in order to secure a sufficient viewing angle and diffusion level, use of a thick diffusion layer having a relatively high diffusion level is essential. As such a thick diffusion layer exists on the black shading portion, contrast of the entire screen is lowered, and a separate thick diffusion layer is used as the diffusion layer. Problems such as an increase in manufacturing cost due to the use of the sheet. In addition, a problem such as yellowing and a decrease in luminance may occur due to the time course change of the photosensitive adhesive layer residue remaining on the light collecting unit without being completely removed.

In order to solve such a problem, by applying the method used in the production of conventional CRT projection TV screen, while producing a sheet having an uneven shape on the opposite side of the lenticular lens, which is an incident lens, Method of forming a black light shielding portion by printing or transferring the convex portion by forming a non-condensing region, that is, a region corresponding to the light shielding portion, as a convex portion after imparting appropriate diffusion performance to the resin used for manufacturing. May be considered. However, in the case of a lenticular lens used in an MD type screen, it is generally desirable to have a pitch of 0.2 mm or less in order to secure good resolution and solve optical problems such as pixel moiré. When the concave and convex portions are formed, it is not easy to arrange the concave and convex portions of the concave and convex portions without shifting the optical axis and the lenticular lens having a pitch of 0.2 mm or less.

Therefore, the present invention solves the problems of the conventional projection TV screen manufacturing technology as described above.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a projection TV screen for a micro display (MD) having a lens having a narrow pitch, so that there is no deviation of the optical axis when the lenticular lens and the light shield are disposed. In addition, it is possible to secure effective diffusion even without using a separate thick diffusion layer to provide a method of manufacturing a lenticular lens sheet that can reduce the contrast inhibition of the screen by using a separate thick diffusion layer. It is another object of the present invention to provide a lenticular lens sheet manufactured as described above.

In addition, an object of the present invention is to provide a method for producing a projection TV screen and a projection TV screen manufactured by the manufacturing method that can realize a low cost yet sufficient diffusion effect by using a separate thick diffusion sheet as a diffusion layer. It is done.

The present invention provides a method of manufacturing a lenticular lens sheet having a lenticular lens on one surface and an uneven portion on the other surface. Specifically,

Manufacturing a sheet having a plurality of cylindrical lenticular lenses disposed on one side thereof and a photosensitive adhesive layer disposed on the other side thereof;

Irradiating light through the lenticular lens to cure a portion of the photosensitive adhesive layer corresponding to the light converging portion of the lenticular lens;

Forming a concave-convex portion in the photosensitive adhesive layer by removing a hardened portion of the photosensitive adhesive layer to form a concave portion;

Forming a light shielding portion on the convex portion of the uneven portion formed in the photosensitive adhesive layer; And

Filling a recess in the photosensitive adhesive layer to form a light diffusion resin having a light diffusing property to form a diffusion part;

It provides a method of manufacturing a lenticular lens sheet comprising a.

According to the above method, an uneven portion may be formed without shifting the optical axis corresponding to the arrangement of the lenticular lens.

In this invention, a light shielding part can be formed by arrange | positioning a light absorbing material in the convex part (convex part) of the uneven part formed in the said photosensitive adhesion layer. Further, the diffusion portion can be formed by filling a concave portion (concave portion) in the concave-convex portion formed in the photosensitive adhesive layer with a resin having light diffusivity. As described above, according to the present invention, the formation of the light shielding portion and the formation of the diffusion portion are very simple and easy, and the cost is low.

In general, a carrier sheet is disposed on the photosensitive adhesive layer, and irradiates light through the lenticular lens to cure a portion of the photosensitive adhesive layer corresponding to the light converging portion of the lenticular lens (see FIGS. 4C and 4D). In the process of removing the cured portion of the adhesive layer, by removing the carrier sheet, only the cured portion of the photosensitive adhesive layer may be attached to the carrier sheet to be removed together with the carrier sheet (see FIG. 4E). As a result, a recess is formed in the photosensitive adhesive layer to form an uneven portion (see FIG. 4F). Thereby, the lenticular lens and the uneven part can be arranged without deviation of the optical axis, and it becomes possible to manufacture a lenticular lens sheet capable of arranging the lenticular lens and the light shielding part without shift of the optical axis.

In the manufacturing method of the lenticular lens sheet, after filling the photosensitive resin as a resin having light diffusivity in the concave portion, it is possible to laminate a filter of a transparent substrate. The filter may act as a protective filter to protect the lenticular lens sheet. In addition, after laminating the filter, it is possible to cure the photocurable resin having uncured light diffusivity forming the photosensitive adhesive layer portion or the diffusion portion by irradiating light through the filter.

In addition, the present invention provides a lenticular lens sheet produced by the above method. 3 shows an example of a lenticular lens sheet of a projection TV screen manufactured by the present invention.

The present invention also provides a method of manufacturing a screen for a projection TV using the lenticular lens sheet and a screen for a projection TV manufactured by the method.

Hereinafter, the present invention will be described in more detail. See FIG. 4 for a detailed description.

First, in manufacturing the lenticular lens sheet, the plurality of cylindrical lenticular lens and the adhesive layer may be formed integrally or may be formed separately. Preferably, a sheet-like support may be introduced to form a lenticular lens on one surface of the sheet and a photosensitive adhesive layer on the other side thereof. The photosensitive adhesive layer is not completely cured, that is, uncured.

Here, as the method for forming the lenticular lens and the photosensitive adhesive layer, a conventionally known method may be applied, and those skilled in the art may select and apply an appropriate method without difficulty. .

Preferably, as a method of using a transparent support, the lenticular lens 1 may be formed on the support 2 as an incident lens.

For example, a roll-shaped mold having a shape opposite to the lenticular lens may be manufactured, and a semi-cured resin may be injected and molded therein. Preferably, an uncured photocurable resin is injected into the mold. After irradiating light through the transparent support in close contact with the transparent support, the photocurable resin may be cured to manufacture a lenticular lens. In addition to the above method, a lenticular lens can be produced by a method such as extrusion.

It is preferable that the pitch of the said lenticular lens is 0.2 mm or less. When the pitch is 0.2 mm or less, the image formed on the screen manufactured by using the lenticular lens sheet is clear and more accurate screen realization is possible. The lower limit of the pitch of the lenticular lens may be appropriately selected according to the manufacturing process and the development of the manufacturing technology of the lenticular lens.

Non-limiting examples of the photocurable resin for forming the lenticular lens 1 include urethane acrylate, epoxy acrylate, ester acrylate and the like, these may be used alone or in combination of two or more. For photocuring, a radical generating monomer, a photoinitiator, or the like may be further mixed and used.

As the support 2, a transparent film or a transparent sheet may be used. For example, polyester, polyvinyl chloride, polycarbonate, polymethyl methacrylate, polystyrene, polyestersulfone, polyether ketone resin may be used alone or in one kind. The film or sheet form manufactured by mixing 2 or more types can be used.

The photosensitive adhesive layer 3 is formed on the opposite side of the lens portion of the lenticular lens which is the incident lens. It is preferable that the carrier sheet 4 is arrange | positioned at the said photosensitive adhesion layer. The carrier sheet is for removing the cured portion of the photosensitive adhesive layer.

The photosensitive adhesive layer may be prepared by an adhesive photosensitive resin composition. There is no particular limitation on the method of forming the photosensitive adhesive layer. The photosensitive adhesive layer may be coated on the rear of the lens portion of the lenticular lens to a predetermined thickness, or a mold may be manufactured on the rear portion of the lens portion of the lenticular lens, and then poured into the flowable adhesive photosensitive resin composition and then solidified. In addition, the photosensitive adhesive layer may be separately prepared, and then laminated on the rear portion of the lens of the lenticular lens. In the lamination, lamination is preferably performed while pressing and heating.

It is also possible to use a tape form in which the photosensitive resin composition forming the photosensitive adhesive layer is attached to the carrier sheet, that is, a photosensitive adhesive layer tape. In this case, the photosensitive adhesive layer can be easily disposed by attaching the tape to the back of the lenticular lens. It is preferable to form another adhesive bond layer in the said carrier sheet so that the photosensitive resin composition which forms a photosensitive adhesion layer may adhere to a carrier sheet.

According to the present invention, in the case of manufacturing the lenticular lens sheet, when irradiating light through the lenticular lens, the adhesive force between the light-converging portion and the peripheral portion of the photosensitive adhesive layer is lower than the adhesive force with the carrier sheet (carrier sheet) to the carrier Upon removal of the sheet, the light collecting portion of the photosensitive adhesive layer may be removed together.

The photosensitive adhesive layer should have a large difference in adhesive peel strength before and after curing. Preferably, the adhesive peeling strength after curing of the photosensitive adhesive layer is 10% or less before curing, preferably 1% or less.

The partial removal of the said photosensitive adhesive layer is determined by the adhesive peeling strength of a carrier sheet and a photosensitive adhesive layer. First, the adhesive peeling strength of 1000gf / 25mm or more, preferably 1500 ~ 2500gf / 25mm, 100gf / 25mm or less, preferably 1 ~ 50gf / 25mm before the photocuring can be used.

On the other hand, the carrier sheet may form a separate adhesive layer having an adhesive peel strength of about 300 to 700 gf / 25 mm, so that the photosensitive adhesive layer may be attached to the carrier sheet. In this case, the adhesive peeling strength between the carrier sheet and the photosensitive adhesive layer is about 300 to 700 gf / 25 mm. It is preferable that the adhesive force between the carrier sheet and the photosensitive adhesive layer is not significantly changed by photocuring. To this end, a separate adhesive layer formed on the carrier sheet may be used that is not affected by photocuring. At this time, the adhesive force between the carrier sheet and the photosensitive adhesive layer can be appropriately changed by adjusting the adhesive force of the separate adhesive layer.

When the adhesive peel strength is as described above, when the photosensitive adhesive layer is partially cured and the carrier sheet is removed, the cured portion of the photosensitive adhesive layer is removed together with the carrier sheet while being attached to the carrier sheet, but the uncured portion In the adhesion of the photosensitive adhesive layer and the carrier sheet is separated, the photosensitive adhesive layer is left without being removed.

The thickness of the photosensitive adhesive layer is preferably about 30 ~ 50㎛. When the photosensitive adhesive layer is too thick, when the cured portion of the photosensitive adhesive layer is removed together with the carrier sheet after curing, the separation surface of the adhesive layer may not be clean. In addition, if the thickness is too thin, it may not be possible to secure a space capable of obtaining a sufficient diffusion effect in the formation of the diffusion portion, which is a post process. Therefore, the thickness is most suitable in consideration of these matters.

In the present invention, as long as the photosensitive adhesive layer is photocurable and tacky, its composition is not particularly limited. Preferably an acrylic pressure-sensitive adhesive containing an acrylic ester may be used as the photosensitive pressure-sensitive adhesive layer of the present invention. Such an acrylic adhesive is generally an acrylic acid polymer and an alkyl ester polymer as an adhesive polymer component. Or a copolymer of acrylic acid and an alkyl ester, and further includes a photocurable (poly) functional monomer or oligomer, a curing agent, a photoinitiator, and the like. The monomers that can be used in the preparation of the acrylic acid polymer, the alkyl ester polymer or the copolymer of acrylic acid and the alkyl ester include acrylic acid esters such as ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and the like (methyl). And acrylic monomers having functional groups such as acrylic acid and 2-hydroxyethyl (meth) acrylate.

The acrylic pressure-sensitive adhesive forming the photosensitive pressure-sensitive adhesive layer is also, for example, trimethylolpropane tri (methyl) acrylate, 1,6-hexanediol (methyl) acrylate, tetraethylene glycol di (methyl) acrylate, ester acrylate oligomer And (poly) functional monomers or oligomers such as urethane acrylate oligomers and the like. In order to increase the degree of crosslinking of the acrylic pressure-sensitive adhesive forming the photosensitive pressure-sensitive adhesive layer, an isocyanate series, a diamide series compound, or the like may be used.

As a photoinitiator, benzoin type compounds, such as benzoin, benzoin methyl ether, benzoin ethyl ether, aromatic ketones, such as benzophenone and (alpha)-hydroxycyclophenyl ketone, can be used, for example.

After laminating the photosensitive adhesive layer, preferably the photosensitive adhesive layer attached to the carrier sheet, light is irradiated through a lenticular lens which is an incident lens (light irradiation). Ultraviolet light (UV) is generally used as the light used for light irradiation. Preferably, parallel light UV having an illuminance distribution of 80% or more is used, and the energy thereof is suitably about 200 to 250 mJ / cm ² .

When the carrier sheet 4 is removed after the light irradiation, the light collecting part 6 of the photosensitive adhesive layer is removed together with the carrier sheet.

That is, the adhesive force between the support 2 or the lenticular lens portion and the non-condensing portion 5 of the photosensitive adhesive layer is greater than that of the carrier sheet and the non-condensing portion 5 of the photosensitive adhesive layer, while the carrier sheet and the photosensitive adhesive layer The adhesive force with the light collecting portion 6 is larger than the adhesive force 7 between the light collecting portion of the photosensitive adhesive layer and the support or the lenticular lens portion. Further, the side adhesive force between the light collecting portion and the non-condensing portion of the photosensitive adhesive layer is smaller than the adhesive force between the carrier sheet and the light collecting portion 6 of the photosensitive adhesive layer. Therefore, the light collecting part of the photosensitive adhesive layer is removed together when the carrier sheet is removed. As a result, an uneven portion is formed (see FIG. 4F).

After forming the uneven portion, the photosensitive adhesive layer may be cured. In this case, a separate curing process may be performed, but in the case of a normal photosensitive adhesive layer, since the curing is performed within 1 to 2 hours when exposed to day-light or fluorescent lamp, a separate curing step is not necessarily required. On the other hand, since light irradiation, preferably UV irradiation is made in the process of forming the diffusion portion, it may not undergo a process of separately curing the photosensitive adhesive layer.

A light shielding part is formed on the photosensitive adhesive layer remaining after the selective removal.

That is, when the condenser of the photosensitive adhesive layer is removed by the carry sheet, the photosensitive adhesive layer becomes an uneven portion having an uneven shape. The light shielding portion is formed in the convex portion of the uneven portion. There is no limitation in the method of forming such a light shielding part. Any method of applying a material having light absorption characteristics to the convex portion may be applied without limitation. For example, the light shielding portion can be formed by applying or stacking a black material. Preferably, a printing method can be used. As the printing method, conventionally known printing methods such as screen printing, printing using a thermal transfer ribbon, gravure printing, and the like can be used. In order to form the light shielding portion, black ink having excellent matting characteristics can be preferably used.

For example, as illustrated in FIG. 4G, a printing method using a thermal transfer ribbon may be applied. That is, the black ink foil 8 is laminated on the convex portion of the photosensitive adhesive layer remaining after the selective removal, and then the ink is transferred by heat treatment or the like, and the non-condensing portion of the photosensitive adhesive layer is removed, that is, the carrier. A light shielding portion can be formed in the convex portion which does not fall off together with the sheet. The thermal transfer process may be preferably performed in a temperature range of about 70 ~ 90 ℃.

As an ink foil that can be used in the printing method using the thermal transfer ribbon, Dupont's cromalin ink foil, or a general general thermal transfer ribbon may be used. At this time, since the non-condensing portion of the photosensitive adhesive layer is left as a protruding portion, the remaining adhesive force makes it possible to obtain a cleaner light shielding portion than that by the conventional ink foil transfer process.

Subsequently, in order to obtain a desired diffusion effect, a resin having diffusibility may be filled in the concave portion of the formed recessed portion to form a diffusion portion. When filling the recess using the resin, the resin may be applied to the light shield as shown in FIG. 4J. In order to improve contrast, it is preferable that the above-mentioned diffusive resin is not coated on the light shielding portion, but the resin is often applied to the light shielding portion in the process, but this is not a problem. When the diffusible resin is applied to the light shielding portion to form a layer, the diffusion portion is in the form of a layer (diffusion layer).

The thickness of the diffusion part is not limited, and since the diffusion performance varies depending on the refractive index and the size of the diffusing agent used, the thickness may be appropriately adjusted according to the diffusion performance. Generally, about 50-120 micrometers is preferable with respect to a recessed part.

It is preferable that the said resin is photocurable resin. There is no particular limitation on the kind of such resin, and may be the same as or different from the resin forming the lenticular lens. Preferably the resin comprises a light diffusing agent for light diffusing properties. Such light diffusing agent can be used without particular limitation as long as it is used as a conventional light diffusing agent.

Preferably, the light diffusing agents have a particle size of about 5 ~ 12㎛ is suitable in terms of the light diffusion effect and the diffuser forming process. Non-limiting examples of such a light diffusing agent include silica beads or aluminum hydroxide beads as inorganic beads, and PMMA beads, styrene beads or SMMA beads which are copolymers of PMMA and styrene as organic beads. These light diffusing agents can be used individually or in mixture of 2 or more types as appropriate.

On the other hand, the haze value of the diffusion is preferably in the range of 50 to 70%. This haze value can be adjusted by the size or refractive index of the diffusion agent used, the thickness of the entire diffusion portion, and the like.

Then, as shown in FIG. 4K, a film or sheet 11 is laminated as a filter on the outermost layer. The film or sheet can act as a protective filter.

The film or sheet used as the filter has functions such as AG (anti-glare), AS (anti-static), HC (hard coating), etc. in the viewer side, that is, the front side direction. It is preferable.

In the case of using a film-type filter as a filter, a photocurable diffusion resin is filled in a recess formed in the photosensitive adhesive layer, and then covered with a filter and a diffusion portion having a desired thickness is formed by squeezing or the like, as in the case of manufacturing a lenticular lens. By irradiating light on the filter side and curing the diffusion portion, curing of the diffusion portion and lamination of the filter can be performed simultaneously.

In the case of using a sheet-shaped filter as a filter, first, the diffusion resin is cured to a desired thickness using a release film, and then the release film is removed and a sheet is attached thereto using PSA or the like.

Thus, the lenticular lens sheet according to the present invention can be produced by the method described above. The present invention can also provide a lenticular lens sheet having excellent contrast properties, excellent optical properties such as moiré suppression, and low manufacturing cost without the use of a separate thick diffusion layer.

The present invention provides a method for manufacturing a projection TV having excellent contrast characteristics and optical characteristics by applying the lenticular lens sheet to a screen for a projection TV.

Hereinafter, the present invention will be described in more detail with reference to the following examples. These examples, comparative examples and test examples are merely illustrative for describing the present invention more specifically, but the scope of the present invention is not limited thereto.

<Example 1>

A lenticular lens was formed on one surface using a polyester film having a total light transmittance of 92% or more having a thickness of 100 μm as a support. The lenticular lens was prepared by the above-described method using an epoxy acrylate and urethane acrylate, and a mixture of monomer and photoinitiator for adhesion and mold release property to a pitch of 0.15 mm.

Subsequently, a photosensitive adhesive layer was formed on the other side of the support. Using the acrylic acid alkyl ester polymer to prepare a separate photosensitive pressure-sensitive adhesive layer to a thickness of 40 ㎛ and adhered to the support at a temperature of about 90 ℃. The carrier sheet is affixed to the said photosensitive adhesion layer.

Subsequently, ultraviolet rays of 250 mJ / cm ² were irradiated through the lenticular lens for 30 seconds to cure a portion of the photosensitive adhesive layer corresponding to the light converging portion of the lenticular lens.

Thereafter, the cured portion of the photosensitive adhesive layer was removed together with the carrier sheet.

The black shading portion was selectively formed by adhering the black ink foil at a temperature of 70 ° C. to the portion not removed together with the carrier sheet. At this time, the ink foil used is a chromin ink foil of DuPont.

Subsequently, the photocurable resin used to manufacture the lenticular lens as the light diffusing resin was filled with a resin containing an organic bead having an average particle size of 5 μm as a light diffusing agent in a portion where the photosensitive adhesive layer was removed to form a diffusion part. . The thickness of the diffusion portion was 120 μm based on the recess. Then, as a filter, AG, AS treatment, the PET film which is 92% or more of total light transmittance, and 250 micrometers in thickness was covered, light irradiation was performed, and the final part was completed by hardening a diffusion part.

As shown in this embodiment, the light shielding portion and the light diffusing portion can be formed by a very simple process.

According to the present invention, it is possible to provide a lenticular lens sheet having excellent contrast characteristics and optical characteristics by effectively forming a light shielding portion and a diffusion portion, and mutually disposing the lenticular lens and the light shielding portion without an error in the optical axis. have. In addition, by using the lenticular lens sheet, it is possible to provide a projection TV screen having excellent contrast characteristics and optical characteristics.

Claims (15)

(1) manufacturing a sheet having a plurality of cylindrical lenticular lenses disposed on one side and a photosensitive adhesive layer disposed on the other side; (2) irradiating light through the lenticular lens to cure a portion of the photosensitive adhesive layer corresponding to the light converging portion of the lenticular lens; (3) forming a concave-convex portion in the photosensitive adhesive layer by removing the cured portion of the photosensitive adhesive layer together with the carrier sheet to form a concave portion; (4) forming a light shielding portion on the convex portion of the uneven portion formed in the photosensitive adhesive layer, which is not removed together with the carrier sheet in the photosensitive adhesive layer; And (5) filling the concave portion of the photosensitive adhesive layer to form a diffusion portion by filling a photosensitive resin having light diffusivity; Method of manufacturing a lenticular lens sheet comprising a. The method of manufacturing a lenticular lens sheet according to claim 1, wherein a carrier sheet is arranged on the photosensitive adhesive layer. The method of manufacturing a lenticular lens sheet according to claim 1, further comprising laminating a protective filter made of a transparent substrate after the step (5). The method of claim 1, wherein step (1) comprises: forming a lenticular lens on one surface of the support sheet; And forming a photosensitive adhesive layer on the other side of the lenticular lens sheet. The method of claim 4, wherein the forming of the photosensitive adhesive layer comprises separately preparing a photosensitive adhesive layer having a carrier sheet, and then stacking the photosensitive adhesive layer on a support. The method of manufacturing a lenticular lens sheet according to claim 1, wherein the pitch of the lenticular lens is 0.2 mm or less. The method of claim 1, wherein the adhesive peel strength of the photosensitive adhesive layer is 1000 gf / 25 mm or more before photocuring and 100 gf / 25 mm or less after photocuring. The method of manufacturing a lenticular lens sheet according to claim 2, wherein the adhesive peeling strength between the carrier sheet and the photosensitive adhesive layer is 300 to 700 gf / 25mm. The method of claim 8, wherein a separate adhesive layer is formed on the carrier sheet, and the adhesive peel strength of the adhesive layer is about 300 to 700 gf / 25mm. The method of manufacturing a lenticular lens sheet according to claim 1, wherein the photosensitive adhesive layer has a thickness of 30 to 50 µm. The method of claim 1, wherein the diffusion part has a thickness of 50 μm to 120 μm based on the recess. The method of manufacturing a lenticular lens sheet according to claim 2, wherein the method of forming the light shielding portion is a printing method. The method of manufacturing a lenticular lens sheet according to claim 12, wherein the printing method is a screen printing method, a printing method using a thermal transfer ribbon, or a gravure printing method. A lenticular lens sheet manufactured by the method for producing a lenticular lens sheet according to any one of claims 1 to 13. A screen for a projection TV comprising the lenticular lens sheet according to claim 14.

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