JPH0915404A - Light diffusion filter by screen printing and its production - Google Patents

Abstract

PURPOSE: To improve characteristics by executing special printing and applying by a screen printing method using respective kinds of diffusion ink which are formed by using specific diffusion materials, such as crystalline org. phosphors and inorg. diffusion materials, as a raw material, have optical characteristics, such as light transmissivity, and less light loss and are suitable for various applications. CONSTITUTION: A film base material is a PET film 1 having a thickness of 100μm and has a structure formed with diffusion layers 2, 3 on both sides. Production stages include printing with the (b) ink (the ink for obtaining the diffusion layer 2) on the upper layer surface side of the film → IR drying →printing with the C ink (the ink for obtaining the diffusion layer 3) on the lower layer surface side of the film → IR predrying → IR drying. The printing method is used as the screen printing method. The org. phosphors or org. fluorescent derivatives of the diffusion materials are ink respectively prepd. to transparency of 0.02 to 5μm or to a solid content of 5 to 60% by selecting respective particulate distributions from a particulate distribution range of transparent slightly white and polygonal face crystalline structures.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light diffusion filter for use in LCD backlight panels, LED display panels, aircraft / vehicle instrument panels, illuminated panels, EL display panels and the like, and a method for producing the same.

[0002]

2. Description of the Related Art As a conventional diffusion filter, a kneading film in which silica, titanium oxide, zinc oxide, aluminum hydroxide, calcium phosphate, etc., which is a diffusing material, is added to a raw material resin of the film, and the diffusing material particles are a film of the film. There is a structure dispersed inside.

Further, as another conventional diffusion filter, silica, titanium oxide, zinc oxide, aluminum hydroxide, calcium phosphate or the like is used as a raw material for the diffusion material on both sides or one side of a transparent PET film, a PC film, etc. There is a structure in which a diffusion layer is formed by applying a paste and applying it by a roll coating method, a knife coating method, or a spray method.

In the conventional diffusion filter, a diffusion material is mixed with a film raw material, kneaded, extruded, and rolled to manufacture the diffusion filter. Further, it is a manufacturing method in which it is applied to a base material film by a coating method or a spray method, which is suitable for mass-producing a single product. However, it is unsuitable for small-lot variety production, and lacks adaptability when the variety of products produced is limited. Further, it is difficult to apply glass beads, glass bubbles as a diffusing material, or roll coating or knife coating in the crystalline and diffused particle distribution, and these particles and crystalline are destroyed, and the particle distribution difference is large. There is a problem that diffusion flatness and diffusion uneven layer defect occur.

[0005]

Therefore, the present invention uses a crystalline organic phosphor, an inorganic diffusing material, a diffusing material such as a spherical glass bubble as a raw material, and has optical functional characteristics such as light transmittance and light diffusing property. It is an object of the present invention to provide a light diffusion filter having excellent characteristics in a manufacturing method in which a light printing loss is small and each diffusion ink suitable for each application is used and special printing is applied by a screen printing method.

[0006]

In order to solve the above-mentioned problems, the light diffusion filter of the present invention comprises a transparent PET film,
On both sides or one side of the base film such as PC film,
Fine particles of crystalline organic fluorescent substance or organic fluorescent derivative 0.02
Classified by particle size of ~ 5 μm (= selected particles)
Inks and types with solid content of 5-60% (=
1-12 μm by screen printing based on optical characteristics by selecting ink from inks whose content has been selected) according to the purpose of use (= according to the setting of transparency and transparency).
It is characterized in that a single-layer or laminated light diffusion layer is formed with the above film thickness.

For the medium-cavity glass bubble inks classified into spherical spheres having a spherical diameter of 2 to 20 μm (= spherical diameter is set), the opening of the screen mesh through which the spherical diameter passes and the photosensitive emulsion thickness are selected. It is characterized by forming a light diffusing layer having excellent light transmittance by printing and applying with a low printing pressure and a soft squeegee hardness so that the glass bubble spheres are formed as a film layer in which they are uniformly arranged in parallel or arranged. To do.

Further, according to the present invention, a fine line stripe pattern or a fine dot pattern is printed by a screen printing method such as a sawtooth shape, a convex wave shape, an uneven shape, a diamond pattern shape, a conical shape, or the like. It is characterized by forming a light diffusing layer which is excellent in light amplification, light diffusing directivity, and light converging property by being applied by printing and overlapping with light refraction and irregular reflection.

[0009]

The light diffusing filter of the present invention comprises a crystalline fine particle organic phosphor on both sides or one side of a transparent film as a base material,
And an organic fluorescent derivative, which is a light-diffusing layer formed by printing and applying the same in a single layer or a laminated layer by a screen printing method. In the process in which light of a visible light source and a three-wavelength light source passes through the diffusing layer, the light enters the fine particle crystal. The light is reflected and refracted on the surface, and the refraction on the crystal light emitting surface is linked to each fine particle in the diffusion layer and between the fine particles, and the light diffusion is amplified in the diffusion layer to obtain uniform light diffusivity.

Further, since the surface of the diffusion layer formed by screen printing has fine irregularities, light scattering occurs because the surface roughness creates an interface with different refractive index, and the diffusion surface is
More uniform diffusivity is obtained.

Further, due to this double diffusion action and structure, a uniform intensity diffusivity with a diffusion intensity distribution angle of 90 to 140 ° can be obtained. In addition, the organic fluorescent substance, the organic fluorescent derivative, and the whitening agent can be used to emit visible light or three-wavelength light at 435 nm and 550 nm.
Depending on the wavelength of the vicinity, it excites and emits pure white light and emits 2 of ultraviolet light.
It is a light diffusion filter having a two-sided sensor function, which is excited by wavelengths near 54 nm and 365 nm and emits blue light.

The light diffusing filter of the present invention has a refractive index of 1.30 on both surfaces of a transparent film as a base material, on the surface of a diffusion layer printed on one side, or on the surface of an uncoated transparent film.
2.50% of transparent high molecular polymer is applied by printing fine line stripes and fine dots by a special method such as screen printing method, and its cross section has fine corrugated shape, uneven shape, sawtooth shape and fine It becomes a light diffusion filter that forms a convex shape such as a cone shape, a diamond pattern, etc., and in the process of light passing through this light diffusion filter, the light that has passed through the film,
The light refracted and diffused in the diffusion layer is refracted at each convex interface, refracted at the interface exiting the convex shape, and the refracted light is amplified and condensed by the action of the lens prism.
It becomes a transmission type lens filter and a diffusion type lens filter that can obtain directivity and light intensity distribution within an angle.

The light diffusing filter of the present invention is prepared by adding a transparent low-refractive polymer binder to borosilicate glass spherical hollow glass bubbles as a diffusing material on both sides or one side of a transparent film as a base material. Then, it is applied by screen printing to form a diffusion layer, and the diffusion layer is a binder layer in the process of forming a film by the buoyancy by enclosing an inert gas in the inner cavity of a spherical glass cavity. It becomes a light diffusing filter formed as a structure in which a spherical hemisphere is raised on the surface, and the light that passes through the spherical glass bubble of the filter and the light is reflected and refracted on the inner surface of the spherical glass bubble and emerges from the layer surface. It becomes diffuse transmitted light on the hemisphere, and reflected light is reflected on the spherical surface, part of which passes into the sphere and is condensed and reflected on the inner surface of the sphere, is amplified and becomes emitted light on the spherical surface, and overlaps with the reflection on the spherical surface. Both properties morphism strength is increased is a light diffusing filter obtained.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. An embodiment of the light diffusing filter and the manufacturing method thereof according to the present invention will be described with reference to FIG.

The film base material is PET having a thickness of 100 μm.
This is a film (1), and this embodiment has a structure in which diffusion layers (2) and (3) are formed on both surfaces. The manufacturing process is
B ink (ink for obtaining diffusion layer (2)) printing on the upper side of the film → IR drying → c ink (ink for obtaining diffusion layer (3)) printing on the lower side of the film → IR preliminary drying → IR Dry.

A screen printing method is used as a printing method. The b ink on the upper surface side has the following configuration. Organic fluorescent substance Coumarin type D-1009 50% Polyester PAL polymer solution 40% 2-methyl2.4-pentanediol 1% Triazole derivative 2% T-980 Diluting solvent 7% Total 100% Printing conditions are as follows.

Screen mesh T-300 Printing pressure 1 kg / cm ² Printing speed 0.3 m / Sec Printing coating thickness 8 μm After drying The c ink on the lower layer side has the following constitution.

Organic fluorescent material Coumarin D-209 14% Syloid 2% Polyester PAL polymer solution 45% Stilbene derivative 2% P.ethylbenzylidene sorbitol 1% T-980 Diluting solvent 36% Total 100% Printing conditions are as follows: Is.

Screen mesh T-350 Printing pressure 1.8 kg / cm ² Printing speed 0.5 m / Sec Printing coating thickness 2 μm after drying In the above description, the diffusion layers (2) and ( 3) is formed, the diffusion layer (2) or (3) may be formed on one surface (see FIG. 1B).

Another embodiment of the light diffusing filter and the manufacturing method thereof according to the present invention will be described with reference to FIG. The film substrate is a PET film having a thickness of 125 μm, and in this example, the diffusion layer (3) is on the lower layer side and the light collecting layer (4) is on the upper layer side.
Is a structure formed.

In the manufacturing process, c ink (ink for obtaining the diffusion layer (3)) is printed on the lower surface side of the film → IR drying →
Printing d ink (ink for obtaining the light collecting layer (4)) on the upper surface side of the film → IR preliminary drying → heat setting.

A screen printing method is used as a printing method. The c ink on the lower layer side and its printing conditions are shown in Fig. 1 above.
Is the same as the example. The d ink on the upper surface side has the following configuration.

Silicone Polymer CY-52 Clear A
/ B 100% printing conditions are as follows. Screen mesh T-380 mesh / emulsion / total thickness 110 μm Pattern dot diameter 100 μm Dot pitch 120 μm Printing pressure 3.5 kg / cm ² Printing speed 0.2 m / Sec Printing coating thickness Convex vertex 25 μm Heat set temperature 140 ° C. Convex shape formation Cone lens type light transmittance d ink layer 86% light diffusion intensity angle d ink layer 18 ° Still another embodiment of the light diffusion filter and the manufacturing method thereof according to the present invention will be described.

The film base material is 100 μm thick PET.
It is a film and has a structure in which a glass bubble layer (5) is formed on the upper surface and a diffusion layer (2) is formed on the lower surface. In the manufacturing process, b ink (ink for obtaining the diffusion layer (2)) is printed on the lower surface side of the film → IR drying → g on the upper surface side of the film.
Ink (ink for obtaining glass bubble layer (5)) printing → curing temperature treatment → IR drying.

A screen printing method is used as a printing method. The b ink on the lower layer surface side and the printing conditions thereof are the same as in the example of FIG. 1 above. The g ink on the upper surface side has the following structure.

Cavity 15 μm spherical glass bubbles 58% Polyester PAL polymer solution 35% Leveling agent 2% T-980 Diluting solvent 5% Total 100% Printing conditions are as follows.

Screen mesh T-200 Clearance 0 mm Peel-up 5 mm Printing pressure 0.5 kg / cm ² Squeegee hardness 55 ° Printing speed 0.5 m / Sec Printing coating thickness Sphere vertex 20 μm / single array Shape hemispherical array Light transmittance g Ink Layer 80% or more Light diffusing g ink layer Same direction directivity Light diffusing angle g Ink layer Within 22 ° Still another embodiment of the light diffusing filter of the present invention and its manufacturing method will be described with reference to FIG.

1, FIG. 2, and FIG. 3 are different from the embodiment shown in FIG. 3 in that a light diffusing layer (2) is formed by b-ink printing on the upper surface of the film and f ink (= transparent fluorine) is formed on the lower surface of the film. Resin Cytop) is formed by screen printing to a film thickness of 1 μm, and a transparent light-transmitting layer (6) is provided, with a light reflection rate of 1% or less, moisture resistance, abrasion resistance, non-adhesiveness, stain resistance, and weather resistance. It is a light diffusion filter having a light transmittance of 84% or more, which has a structure imparting functions such as transparency and light transmittance.

This light diffusing filter becomes a filter which is less likely to be charged by the f ink on the lower surface side of the film, is less likely to become dirty, and has a high light uptake ratio and a low light reflection to the lower surface side (transmittance is high).

Still another embodiment of the light diffusing filter and the manufacturing method thereof according to the present invention will be described with reference to FIG. The difference from the embodiment of FIG. 1 is that a transparent light transmitting layer (6) formed by f ink printing is provided on the lower layer side of the film, and a light transmitting diffusion layer (3) of c ink printing is further formed on the upper layer side of the film.
A light diffusion filter having a light transmittance of 80% or more, which is formed in a laminated structure by providing a high diffusion layer (2) for ink printing.

Another embodiment of the light diffusing filter and the manufacturing method thereof according to the present invention will be described with reference to FIG. This embodiment is different from the embodiments of FIGS. 4 and 5 in that a light-transmitting diffusion layer (3) of c ink printing is provided on the lower surface side of the film, and a stripe and a line pattern having a fine line width of 70 μm are provided on the upper surface side of the film. A transparent light-refractive polymer d-ink printing realizes a light condensing lens functional structure in which a serrated convex layer (7) is formed. Light transmittance 91%, light diffusion intensity angle 14 ° Light direction That is, it is a sex diffusion filter.

Further, on the lower surface layer of the light transmission diffusion layer (3),
You may further provide the transparent light transmission layer (6) by f ink printing shown in FIG. Another embodiment of the light diffusing filter and the manufacturing method thereof according to the present invention will be described with reference to FIG.

In this example, a transparent light transmitting layer (6) formed by f ink printing on the lower surface side of the film, a light transmitting diffusion layer (3) formed by c ink printing on the upper surface side of the film, and a collection by d ink printing. The optical layer (4) is laminated.

Instead of the light collecting layer (4), d shown in FIG.
A serrated convex layer (7) may be formed by ink printing. Another embodiment of the light diffusing filter and the manufacturing method thereof according to the present invention will be described with reference to FIG.

In this example, a glass bubble layer (5) formed by g-ink printing on the lower surface of the film, a fine line width 70 μm stripe on the upper surface of the film, and a line pattern of d ink of a transparent high refractive polymer. A serrated convex layer (7) is formed by printing.

The embodiment of the present invention is not limited to the above-mentioned embodiment, and the combination of laminating each layer and the combination of the layers provided on the upper surface and the lower surface of the film are as follows.
Various combinations other than the above are possible, and it goes without saying that any combination may be selected.

As described above, the present invention provides a light intensity distribution of a light source for a backlight of an LCD display, an LED display panel, an illuminated display panel, etc., and a light intensity distribution of light guide,
Is used as a uniform light emitting surface, and the direction of light refraction for converging the outgoing angle light from the light source or the light guide, the transmitted light, and the diffused light within the viewing angle, and using a material with high transparency, Provided is a method capable of manufacturing a light diffusion filter having each function by screen printing method for improving the light emitting surface brightness of each light source and a light emitting body by refraction and transmissivity, light emission by photoexcitation, and amplification.

Then, inks in which a crystalline fine particle organic fluorescent substance or an organic fluorescent derivative is blended on both sides or one side of a transparent PET film, a PAR film, a PC film,
A light-diffusing filter having a light-diffusing layer structure formed by printing and applying a single layer or a laminated layer by screen printing is realized.

In addition, a high refractive index transparent high molecular polymer is used as an ink, and a light condensing lens layer having a conical convex shape of a fine dot pattern and a sawtooth convex shape of a fine stripe pattern is screen-printed on a transparent film or a diffusion layer. Method to realize a light directivity diffusion filter having a structure formed by printing and coating.

Further, an ink prepared by mixing spherical glass bubbles in a spherical shape is screen-printed, and glass bubble particles having a parallel shape structure are applied by printing on the surface of the transparent film or the surface of the diffusion layer. Implement a diffusion filter.

Further, a transparent fluororesin CYTOP, which has a reflectance of incident light of 1% or less and enhances light transmittance, is 1 μm or less on the surface of the transparent film which receives light and on the surface of the transparent film formed on one side of each of the diffusion layers. The film is applied by screen printing to the thin film layer to realize a light diffusion filter having light transmission, moisture resistance, stain resistance, weather resistance, light distribution, and non-adhesiveness.

The present invention realizes a method of manufacturing a light diffusion filter in which these light diffusion structure layers are formed by a screen printing coating method. FIG. 9 shows how light incident from a lower layer is condensed on the upper surface side when a light collecting layer (layer 4 or layer 7) having a lens effect is formed. FIG. 10 shows the light collection characteristics of various filters. A is a diffusion filter in which diffusion layers are formed on both sides (for example, the embodiment of FIG. 1), B
Is a diffusion filter in which a light diffusion layer is laminated (for example, the embodiment of FIG. 5), C is a diffusion filter in which a glass layer is formed (for example, the embodiment of FIG. 3), and D is a diffusion filter in which a lens layer is formed (for example, FIG. 2, (Examples of FIGS. 6, 7, and 8).

[0043]

As described above, the light diffusing filter according to the screen printing coating method of the present invention uniformly distributes the strong and weak transmitted light that is incident on the surface of the diffusing filter into a wide angle distribution of 90 to 140 ° in the diffusing layer. As diffused light that has been diffused and amplified,
In addition to the function of exiting from the surface of the diffusion filter and the function of refracting a light beam that is transmitted through the surface of the diffusion filter at an incident angle of 60 ° to a nearly vertical angle by the diffusing material of the diffusing layer and diffusing it out of the surface of the filter. The organic fluorescent substance and the organic fluorescent derivative used as the diffusion material of the b diffusion ink and the c diffusion ink emit pure white light at the visible light wavelength by excitation of the light wavelength, and emit bright blue light at the ultraviolet light wavelength. Has a function as an optical wavelength detection sensor or a polarization sensor, and is characterized by excellent diffusion characteristics and sensor functionality.

Further, when a transparent high refractive index polymer is used for d ink, scattered light and diffused light that form a conical lens shape in fine dot pattern printing and a sawtooth lens shape in fine stripe pattern printing However, when it enters this lens, it is refracted, amplified in the direction in which light is condensed, and emitted. Therefore, the emitted light has a high luminous flux density, high brightness, and directivity with a diffusion angle within 10 to 30 °. Due to the reverse structure of forming the upper layer surface of this diffusion layer as the lower layer surface, the transmitted light incident from the direction of the light emitting lens surface is
It is characterized by the two-sided property that it is expanded by the refraction of the lens and diffuses the light.

Further, in the diffusion filter using the g-ink true spherical medium hollow glass bubble in the diffusion layer, the hemispheres of spherical particles are arranged in parallel with the diffusion surface, and when the incident light angle is 35 ° or more, the light receiving apex angle is 110 °. All the light is incident within the range, and the light is transmitted at 180 ° with respect to the incident light angle. Light incident at right angles to the spherical surface is 100% transmitted and becomes emitted light. Light incident at an angle deviating from the right angle with respect to the spherical surface is reduced, but is refracted by the glass layer, reflected on the inner surface of the cavity in the glass bubble, and emitted as diffuse reflection or scattered light. Therefore, the light incident at each right angle on the spherical surface has the characteristic of being the diffusiveness of the light intensity distribution on the diagonal line of each right angle, and the light diffusing property, the heat insulating property of each function, and the It is characterized by heat resistance, weather resistance and transparency.

The b-ink, c-ink, d-ink, and g-ink having the respective performances and characteristics are used to form the diffusion layer by the screen printing coating method, and the optical characteristics of the light diffusion filter and the excellent function are imparted by the printing technique. This is because the film formation of each of the functional characteristics described above, the laminated diffusion structure, and the like are formed, and the screen printing has good workability for low-volume, high-mix production, and can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a diagram shown for explaining an embodiment of a light diffusion filter and a manufacturing method of the present invention.

FIG. 2 is a view shown for explaining another embodiment of the method for manufacturing the light diffusion filter of the present invention.

FIG. 3 is a diagram shown for explaining yet another embodiment of the method for manufacturing a light diffusion filter of the present invention.

FIG. 4 is a view shown for explaining another embodiment of the method for manufacturing the light diffusion filter of the present invention.

FIG. 5 is a view shown for explaining another embodiment of the method for manufacturing the light diffusion filter of the present invention.

FIG. 6 is a diagram shown for explaining still another embodiment of the method for manufacturing the light diffusion filter of the present invention.

FIG. 7 is a diagram shown for explaining yet another embodiment of the method for manufacturing the light diffusion filter of the present invention.

FIG. 8 is a diagram shown for explaining still another embodiment of the method for manufacturing the light diffusion filter of the present invention.

FIG. 9 is a functional explanatory view of a light diffusion filter having a light collecting layer.

FIG. 10 is an explanatory diagram showing the light collection characteristics of each light diffusion filter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transparent film base material, 2 ... Organic fluorescent substance diffusion layer by b ink, 3 ... Organic fluorescent substance diffusion layer by c ink, 4 ... d
Conical convex lens layer (dot pattern) with ink, 5
A saw-toothed convex lens layer (stripe pattern) made of d ink, a light reflection preventing transmission layer made of f ink, and a medium cavity glass bubble diffusion layer made of 7 g ink.

Claims (12)

[Claims] 1. A light-transmitting and transparent film such as a PET film, a PES film, a PC film, etc., is provided on both or one side of the film with a crystalline fine particle organic fluorescent substance having an optical refraction or an organic fluorescent derivative as a diffusing material. Using the ink prepared as the raw material, the diffusion film layer can
The organic fluorescent substance or the organic fluorescent derivative used as the diffusing material has a transparency of 0.02 to 5 μm or a transparent slightly white color.
It is an ink in which each fine particle distribution is selected from the fine particle distribution range of the polygonal crystal structure and each solid content is 5 to 60%, and the amount of the diffusing material mixed and the thickness of the diffusing layer are controlled by the diffusing layer. Fine irregularities are formed on the surface of the diffusion layer in the process of film formation after passing through the screen high mesh of screen printing, and the transmitted light is subjected to multi-refraction and reflection on the inner and outer surfaces of the crystal of the diffusion material, and fine light. A light diffusing filter characterized in that a light diffusing layer is formed on the uneven surface so that a high diffusivity excellent in light transmittance is obtained. 2. A transparent PET film, a transparent PET film, or P, which has a light-diffusing property of 0.02 to 5 μm of transparency or an organic fluorescent substance of transparent fine white crystalline fine particles or an organic fluorescent derivative as a diffusion raw material.
1 to 12μ on both sides or one side of film such as C film
A diffusion layer is printed and applied by screen printing to a film thickness of m. This diffusion layer is formed on the crystal plane of the diffusion layer by reflected light due to the aggregation of 5 to 60% of polygonal crystal fine particles having high light transmittance. Reflected and diffracted into white reflected light, and transmitted light has a light transmittance of 60 to
A light diffusion filter, wherein the light diffusion filter is configured as a diffusion layer having a wide angle diffusivity of 82% and a light intensity distribution angle of 90 to 140 ° and a uniform light intensity distribution. 3. A transparent film such as PET film, PC film, etc. 0.02 to 5 .mu.
When the organic fluorescent substance of the crystalline fine particles of m or the organic fluorescent derivative crystalline particle of the diffusion layer having a different particle shape and the diffusion layer having a different content of the diffusion material are laminated by screen printing, the transmitted light is It is configured as a high diffusion layer in which refraction light is amplified between each diffusion layer and each layer when passing through different layers of each particle of a laminated layer or layers having different contents, and a total film thickness of 3
A light diffusing filter having a laminated structure of ˜20 μm. 4. A layer in which hollow spheres of borosilicate glass having a spherical shape of 2 to 20 .mu.m are used as a diffusion material on both sides or one side of a transparent film such as a PET film and a PC film as a raw material, and spherical spheres are arranged in parallel and in parallel. Is formed by screen printing, and the transparent hollow glass bubble has a light transmittance of 88.
% Or more, and when the light passes through the layers of spherical glass bubble particles arranged in parallel, and the layers of overlapping density that are arranged in parallel are highly transparent and diffusive, the light is reflected and diffracted by being reflected on the spherical surface and the inner surface of the inner cavity, In the reflected light, spherical glass bubble particles are arranged in parallel and parallel spheres have the same directional characteristic of parallel reflection with respect to the incident light, and are configured in a structure that can obtain both characteristics of a high reflection layer and a high diffusion layer. A light diffusion filter characterized in that 5. A transparent film such as a PET film, a PC film, etc., or both sides or one side of the film side of a diffusion filter coated with an organic fluorescent substance of a diffusing material or an organic fluorescent derivative on one side, A stripe pattern of fine lines having a line width of 20 to 200 μm and a pitch width of 30 to 350 μm, or a diameter of 100 to 30
A fine dot pattern of 0 μm and a pitch of 120 to 360 μm is formed by heat treatment of an acrylic resin, a polyurethane / acrylate resin, a silicone resin, which is a transparent polymer resin having an optical characteristic refractive index of 1.30 to 2.50%. Using a curable or photo-curable material as a raw material, a fine stripe pattern with a wavy cross section, an uneven shape or a fine conical pattern, a diamond pattern, etc. The transmitted light passes through the film and becomes a uniform diffused light in the diffusion layer. The refractive index of each resin and the light refraction at the inner and outer surfaces of each convex shape are amplified and amplified by the convex shape. As for light, light diffusion becomes a directional light intensity enhancement distribution, and depending on the convex shape,
A light diffusion filter characterized in that the light to be amplified has a uniform intensity-enhanced diffusion distribution and is structured to amplify the light. 6. The diffusion material used for the diffusion layer is made of an organic fluorescent substance or an organic fluorescent derivative as a raw material, and is a coumarin-based, cyanine-based, perylene-based, azo-based, squarylium-based, stilbene-based, anthracene-based, associative thiapyrylium. Organic fluorescent substances such as salt cyanine type, phthalocyanine type, quinizarin type, diacetylene type, stilbene type, merocyanine type,
And an organic fluorescent derivative as a matrix, which is subjected to activation treatment to make the crystalline organic fine particles 7 to 60%, a transparent and whitening agent bis (P ethylbenzylidene) sorbitol, diamino G benzothiophene dioxide, coumarin, oxacyanine , Diaminostilbene, etc., 1 to 5%, transparent polymer resin polymer solution 20 to 80%, as stabilizer, 2
Methyl 2.4-pentanediol, 1.2-probandiol, 0.5 to 5% was added to form a paste, an organic diluting solvent was added, and it was a screen-printed ink. The layer applied by screen printing to a thickness of 1 to 12 μm is a light diffusion filter characterized by forming a uniform dispersion of crystalline fine particles and a parallel diffusion layer,
In addition, this light diffusion filter is used for visible light 435 nm and 550 nm.
2. The light according to claim 1, which has a two-sided sensor function of being excited by light having a wavelength of about nm to emit pure white light, being excited by ultraviolet rays having wavelengths of about 254 nm and 365 nm, and emitting colored light of blue. Diffusion filter. 7. A light transmissive and transparent film such as a PET film, a PES film, a PC film, etc., is provided on both or one side thereof with an organic fluorescent substance of crystalline fine particles having an optical refraction or an organic fluorescent derivative as a diffusing material. Using the ink prepared as the raw material, the diffusion film layer can
It is a method of forming by coating with a film thickness of 12 μm, wherein the organic phosphor or the organic fluorescent derivative used as the diffusing material has a transparency of 0.02 to 5 μm, or a transparent slightly white color,
It is an ink in which each fine particle distribution is selected from the fine particle distribution range of the polygonal crystal structure and each solid content is 5 to 60%, and the amount of the diffusing material mixed and the thickness of the diffusing layer are controlled by the diffusing layer. Fine irregularities are formed on the surface of the diffusion layer in the process of film formation after passing through the screen high mesh of screen printing, and the transmitted light is subjected to multi-refraction and reflection on the inner and outer surfaces of the crystal of the diffusion material, and fine light. A method for producing a light diffusing filter, characterized in that a light diffusing layer is constituted so that light diffracting is strengthened on the uneven surface and a high diffusivity excellent in light transmittance is obtained. 8. A transparent PET film, a transparent PET film, or P, which is made of an organic fluorescent substance or an organic fluorescent derivative of 0.02 to 5 μm transparent or transparent fine white crystalline fine particles having a light diffusing property as a diffusion raw material.
1 to 12μ on both sides or one side of film such as C film
It is a diffusion layer which is applied by screen printing to a film thickness of m. This diffusion layer is formed by the aggregation of 5 to 60% of polygonal crystal fine particles having a high light transmission property. Reflected and diffracted into white reflected light, and transmitted light has a light transmittance of 60 to
A method for producing a light diffusing filter, wherein the light diffusing filter is configured as a diffusion layer having a wide angle diffusivity of 82% and a light intensity distribution angle of 90 to 140 ° and a uniform light intensity distribution. 9. A transparent film such as PET film, PC film, etc. 0.02 to 5 .mu.
When the organic fluorescent substance of the crystalline fine particles of m or the organic fluorescent derivative crystalline particle of the diffusion layer having a different particle shape and the diffusion layer having a different content of the diffusion material are laminated by screen printing, the transmitted light is It is configured as a high diffusion layer in which refraction light is amplified between each diffusion layer and each layer when passing through different layers of each particle of a laminated layer or layers having different contents, and a total film thickness of 3
A method for manufacturing a light diffusing filter, characterized in that the light diffusing filter has a laminated structure of ˜20 μm. 10. A transparent film such as a PET film, a PC film, or the like. A layer in which spherical spheres of borosilicate glass having a spherical shape of 2 to 20 .mu.m are used as a diffusing material on one side or both sides of the transparent glass, and spherical spheres are arranged in parallel and in parallel. Is formed by screen printing, and the transparent medium hollow glass bubble has a light transmittance of 8
It is 8% or more, and when light is transmitted through a layer of spherical glass bubble particles arranged in parallel and in parallel and in an overlapping density, it exhibits high transparency and diffusivity that is reflected and diffracted by the surface of the sphere and the inner surface of the inner cavity to diffuse light. , In the reflected light, spherical glass bubble particles are arranged in parallel, and parallel spherical parallel spheres have the same directional characteristic of parallel reflection with respect to the incident light, and both high reflection layer and high diffusion layer characteristics are obtained. A method for manufacturing a light diffusion filter, which is characterized by the above. 11. A transparent film such as a PET film, a PC film, etc., or both sides of one side of the film surface of a diffusion filter coated with an organic phosphor of a diffusing material or an organic fluorescent derivative on one side by screen printing, A stripe pattern of fine lines having a line width of 20 to 200 μm and a pitch width of 30 to 350 μm, or a diameter of 100 to 30
A fine dot pattern of 0 μm and a pitch of 120 to 360 μm is formed by heat treatment of an acrylic resin, a polyurethane / acrylate resin, a silicone resin, which is a transparent polymer resin having an optical characteristic refractive index of 1.30 to 2.50%. Using a curable or photo-curable material as a raw material, a fine stripe pattern with a wavy cross section, an uneven shape or a fine conical pattern, a diamond pattern, etc. The transmitted light passes through the film and becomes a uniform diffused light in the diffusion layer, and the refractive index of each resin and the light refraction at the inner and outer surfaces of each convex shape are amplified, and the light amplified by the convex shape is , Light diffusion becomes a directional light intensity enhancement distribution, and depending on the convex shape,
A method of manufacturing a light diffusion filter, wherein the amplified light has a uniform intensity-enhanced diffusion distribution, and the light is amplified. 12. The diffusion material used for the diffusion layer is made of an organic fluorescent substance or an organic fluorescent derivative as a raw material, and is a coumarin-based, cyanine-based, perylene-based, azo-based, squarylium-based, stilbene-based, anthracene-based, associative thiapyrylium. Organic phosphors such as salt-cyanine-based, phthalocyanine-based, quinizarin-based, diacetylene-based, stilbene-based, merocyanine-based organic phosphors and organic fluorescent derivatives are used as a matrix, and the organic phosphors, which have been activated and processed into crystalline fine particles, are contained in an amount of 7 to 60. %, Transparent and whitening agent bis (P ethylbenzylidene) sorbitol, diamino G benzothiophene dioxide, coumarin, oxacyanine, diaminostilbene, etc. 1-5%, transparent polymer resin polymer solution 20-80%, As a stabilizer, 2-methyl 2.4-pentanediol, 1.2-probandiol, 0.5-5% It is a compounded ink that is made into a paste by adding an organic diluting solvent and is made to be screen-printed. The layer formed by screen-printing with a formed film thickness of 1 to 12 μm is a uniform crystalline fine particle. Is a light diffusion filter characterized by forming a diffusion layer in parallel with the dispersion of,
In addition, this light diffusion filter is used for visible light 435 nm and 550 nm.
8. The light according to claim 7, which has a two-sided sensor function of being excited by light having a wavelength near nm, emitting pure white light, being excited by ultraviolet light having wavelengths near 254 nm and 365 nm, and emitting colored light in blue. Diffusion filter manufacturing method.