KR20090114708A - Light modulation object - Google Patents

Abstract

PURPOSE: A light modulation object is provided to reduce power consumption and change the property of the irradiated light by forming a birefringence interface of the isotropic material and the birefringence polymer. CONSTITUTION: The birefringence polymer(110) is arranged within the substrate(100). The birefringence polymer is arranged in one direction of substrate. The birefringence polymer is perpendicularly arranged to the light source. The birefringence polymer is the volume of 1 ~ 90% of the total optical modulation object. The optical modulation object includes the structuralized surface layer. The configurated surface layer has the light-projected side.

Description

Light Modulation Objects {LIGHT MODULATION OBJECT}

The present invention relates to a light modulator, and more particularly, to a light modulator that can be used optically useful by modulating the light irradiated on the substrate into a light of a desired form.

Light modulation object is known in the art as being composed of a mixture of water (混在物, inclusion) dispersed in the continuous matrix. The characteristics of the mixture can be manipulated to provide a range of reflectivity and transmittance to the light modulating object. Such features include the size of the mixture with respect to the wavelength in the object, the shape and arrangement of the mixture, the volume fraction of the mixture, and the refractive index mismatch with the continuous matrix (substrate) along the three orthogonal axes of the object.

Conventional absorbing polarizers comprise inorganic rod-shaped chains of light absorbing iodine arranged in a polymer matrix on their mixture. Such films tend to absorb light polarized according to their electric field vectors aligned parallel to the rod-shaped iodine chains, thereby transmitting light polarized perpendicular to the rods. Since the iodine chain has two or more dimensions smaller than the wavelength of visible light and the number of chains per cubic wavelength of light is large, the optical properties of the light modulator are mainly specular, and are diffusely transmitted through the light modulator or Diffuse reflections from the surface of the light modulation object are very minimal. Like most other commercially available light modulation objects, such light modulation objects are based on the selective absorption of polarization.

Light modulated objects filled with inorganic mixtures having various properties can provide different optical transmission and reflectivity. For example, coated mica flakes having two or more dimensions relative to the wavelength of the visible region are incorporated into the polymer film and the paint to impart metallic luster. By manipulating the flakes to be in the film plane, it is possible to provide strong direction dependence on the reflection aspect.

Such effects can be used to produce safety screens that are reflective for certain viewing angles and that are transparent at other viewing angles. Large flakes with coloration (selective specular reflection) depending on the alignment of the incident light may be incorporated into the film to provide evidence of tampering. In this application, all the flakes in the film need to be similarly aligned with respect to each other.

However, optical films made from polymers filled with inorganic blends have several disadvantages. Typically, the adhesion between the inorganic particles and the polymer matrix is poor. Thus, the optical properties of the light modulator are reduced when stress or strain is applied across the matrix, since the bond between the matrix and the blend is impaired and the rigid inorganic blend may rupture. In addition, in order to align the inorganic mixture, further consideration is required in the processing step, which makes the manufacturing method complicated.

However, more fundamentally, since the optical properties of the matrix constituting the conventional light modulation object and the optical properties of the mixture inserted into the matrix are optically isotropic, there is a problem that the efficiency of light modulation is inferior.

The present invention has been made to solve the above-described problems, an object of the present invention is to provide a light modulation object that can maximize the light modulation efficiency by disposing a birefringent polymer having different optical properties from the substrate in the substrate.

In an optical modulator according to an aspect of the present invention for solving the problems to be solved by the present invention, a birefringent polymer is disposed in a substrate.

At this time, the substrate is isotropic and preferably the substrate is polyethylene naphthalate (PEN), polyethylene naphthalate copolymer (co-PEN), polyethylene terephthalate (PET), polyethylene terephthalate copolymer (co-PET), poly Carbonate (PC), polycarbonate (PC) alloy, polystyrene (PS), heat-resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene ( PE), acrylonitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile mixture (SAN), ethylene vinyl acetate (EVA), polyamide At least one of (PA), polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyester (UP), silicone (SI), elastomer and cycloolefin polymer Can be used.

As the birefringent polymer, a material having the same material or birefringence as the base material may be preferably used. Preferably, the birefringent polymer may be disposed in the substrate in one direction, and more preferably, the birefringent polymer may be disposed in the substrate perpendicular to the light source.

Preferably, the birefringent polymer has a volume of 1% to 90% with respect to 1 cm 3 of the optical modulator, and 500 to 10 ¹⁰ birefringent polymers may be disposed with respect to 1 cm 3 of the optical modulator.

The light modulator may preferably comprise a structured surface layer, which may be formed on the side from which light is emitted. The structured surface layer may be prismatic, lenticular, convex and the shape may have regularity and irregularity. In addition, the birefringent polymer may or may not be disposed in the structured surface layer.

The light modulated object may transmit light emitted from a light source, and transmitted light may be natural light or polarized light, and the birefringent polymer may be stacked or dispersed in the substrate.

The birefringent polymer may preferably be a birefringent fiber. The birefringent fibers may preferably be optically modulated fibers comprising anisotropic core fibers, more preferably the optically modulated fibers may comprise anisotropic core fibers disposed in the filler.

The filler is preferably isotropic, and more preferably, the same material as the base material and an isotropic material may be used, and the anisotropic core fiber may be preferably a material having the same material or anisotropy as the base material.

The refractive index of the filler and the anisotropic core fiber is preferably a difference in the refractive index of the two axial direction is 0.03 or less and the difference in the refractive index of the other one axial direction is 0.05 or more.

The anisotropic core fibers may preferably comprise a fiber shell surrounding the fiber core.

The light modulating object may preferably comprise a plurality of light modulating fibers having different cross-sectional shapes, and one or more of the filler and the anisotropic core fiber may include a birefringent polymer material.

At least one of the polymeric light modulated fibers and anisotropic core fibers may be preferably elongated in the longitudinal direction.

The optically modulated fiber may be preferably an ecchotype composite fiber, in which case the poncho composite fiber corresponds to an anisotropic core fiber in the core portion, and corresponds to a filler material in the chord portion.

The optically modulated fiber may be preferably sea island yarn, the anisotropic core fiber may correspond to the island portion of the island-in-the-sea yarn, and the filler may correspond to the sea portion of the island-in-the-sea yarn. In this case, the refractive indices of the sea portion and the seam portion are preferably different from each other in at least one direction, and more preferably, the refractive indices of the sea portion and the seam portion have a difference in refractive index between two axial directions of 0.03 or less and the rest. The difference in refractive index with respect to one axial direction may be 0.05 or more.

The area ratio of the sea portion and the island portion may be preferably 2: 8 to 8: 2.

Preferably, a plurality of the islands are disposed in the island-in-the-sea yarn, and preferably, the sea portion is isotropic and the island portion is anisotropic.

The polymer used in the island-in-the-sea yarn is preferably polyethylene naphthalate (PEN), polyethylene naphthalate copolymer (co-PEN), polyethylene terephthalate (PET), polyethylene terephthalate copolymer (co-PET), polycarbonate ( PC), polycarbonate (PC) alloy, polystyrene (PS), heat-resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE) , Acrylonitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile mixture (SAN), ethylene vinyl acetate (EVA), polyamide (PA ), Polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyester (UP), silicone (SI), elastomer and cycloolefin polymer Can be used as sea component and island component, respectively.

The thickness of the island-in-the-sea yarn is preferably 0.3 to 20 denier, and 500 to 4,000,000 pieces of the island-in-the-sea yarn may be disposed with respect to 1 cm 3 of the light modulator.

The cross section of the island-in-the-sea yarns preferably has a deformed cross section, and more preferably may have a circular or elliptical shape.

The cross section of the figure may preferably have a shaped cross section.

The refractive index of the sea portion may preferably match the refractive index of the substrate of the light modulator.

The island-in-the-sea yarn is preferably woven in warp and weft yarns, or in the form of a beam without weft yarns. In addition, one of the weft yarn and the warp yarn may be the island-in-the-sea yarn, and the other may be isotropic fibers. The weft yarn or warp yarn may be formed by gathering 1 to 200 strands.

The birefringent fibers may preferably be divided yarns consisting of an isotropic filler and anisotropic splits partitioned therethrough, in which case the cross section of the split yarns may be a heteromorphic cross section. Preferably, the isotropic filler may be formed in plural.

The plurality of isotropic fillers may preferably be parallel or intersect inside the split yarn.

According to another aspect of the present invention, an optical modulation object includes a birefringent light modulating fiber disposed on a substrate, and the birefringent light modulating fiber includes an anisotropic core fiber disposed in a filler, and the refractive index of the anisotropic core fiber is the filler. The refractive index is different from the refractive index in at least one axial direction and forms a plurality of birefringent interfaces between the anisotropic core fibers and the filler.

The substrate and the filler are preferably isotropic.

Preferably, the refractive index of the anisotropic core fiber is within 0.03 of the refractive index of the filler in two axial directions, and the difference of the refractive index of the filler is 0.05 or more in the other one axial direction.

According to another aspect of the present invention, an optical modulation object has a refractive index in the x-axis direction of nX1, a refractive index in the y-axis direction of nY1, a refractive index of nZ1 in the z-axis direction, and a refractive index in the x-axis direction of the birefringent optical modulation fiber. When the refractive index of nX2 and the y-axis direction is nY2 and the refractive index of the z-axis direction is nZ2, it is preferable that at least any one of these X, Y, Z-axis refractive indexes coincides.

The refractive index may preferably be nX2> nY2 = nZ2.

The birefringent optically modulated fiber may preferably include anisotropic core fibers disposed in the filler, wherein the refractive index in the x-axis direction is nX2, the refractive index in the y-axis direction is nY2, and the refractive index in the z-axis direction is When nZ2 is the refractive index of the filler in the x-axis direction of nX3, the y-axis of the refractive index of nY3 and the z-axis of the refractive index of nZ3, the absolute value of the difference between the refractive index of the nX2 and nX3 may be 0.05 or more. In this case, the absolute value of the difference between the refractive indices of nY2 and nY3 or nZ2 and nZ3 may be less than 0.03.

According to another aspect of the present invention, a light modulation system includes a light source and a birefringent light modulation fiber disposed on the light source and including anisotropic core fibers in a substrate to modulate the light incident from the light source. It includes a light modulated object.

The terms used herein are briefly described.

Unless stated otherwise, it means that the polymer has birefringence. When light is irradiated onto a polymer having a different refractive index depending on the direction, the light incident on the polymer is refracted by two light having different directions.

Isotropic means that when light passes through an object, the refractive index is constant regardless of the direction.

Anisotropy means that the optical properties of an object vary depending on the direction of light. Anisotropic objects have birefringence and correspond to isotropy.

Light modulation means that the irradiated light is reflected, refracted, scattered, or the intensity of the light, the period of the wave, or the property of the light is changed.

In the optical modulator of the present invention, when the birefringent polymer is disposed in the isotropic substrate and the light is irradiated into the substrate, the birefringent interface is formed due to the difference in optical properties between the isotropic substrate and the birefringent polymer, and thus irradiated light as necessary It is possible to improve the brightness and reduce the power consumption by changing the properties of the light, or by integrating, scattering, reflecting, or refracting light.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail.

Conventional light modulators have both optical and isotropic optical properties of the matrix constituting the optical modulator, and thus the irradiated light is not modulated in various forms, resulting in inferior light modulation efficiency and modulation in the desired shape. There was a difficult problem.

Accordingly, in the optical modulator of the present invention, a birefringent polymer is disposed in a substrate, and light incident from the outside into the optical modulator is reflected, scattered, and refracted at a birefringent interface that is an interface between the birefringent polymer and the isotropic substrate. Done. In particular, light irradiated from an external light source can be largely divided into S-polarized light and P-polarized light. When only a specific polarized light is desired, P-polarized light passes through an optical modulator without being affected by the birefringent interface, whereas S-polarized light is the birefringent interface. In the case of refraction, scattering, and reflection, the P-polarized light passes through the light-modulated object when it is modulated into a randomly shaped wavelength, ie, S-polarized light or P-polarized light, and is reflected back to the light modulator. If this process is repeated, the desired P polarization can be obtained.

1 is a schematic diagram of a cross section of a cut surface of an optical modulator according to an embodiment of the present invention. Specifically, in the optical modulation object, the birefringent polymer 110 is freely arranged in the substrate 100 having isotropy. The substrate 100 that can be used at this time includes a thermoplastic and thermosetting polymer that transmits the light wavelength in the desired range. Preferably the suitable substrate 100 may be amorphous or semicrystalline and may comprise a homopolymer, copolymer or blend thereof. Specifically poly (carbonate) (PC); Syndiotactic and isotactic poly (styrene) (PS); Alkyl styrenes; Alkyl, aromatic and aliphatic ring containing (meth) acrylates including poly (methylmethacrylate) (PMMA) and PMMA copolymers; Ethoxylated and propoxylated (meth) acrylates; Polyfunctional (meth) acrylates; Acrylated epoxy; Epoxy; And other ethylenically unsaturated substances; Cyclic olefins and cyclic olefin copolymers; Acrylonitrile butadiene styrene (ABS); Styrene acrylonitrile copolymer (SAN); Epoxy; Poly (vinylcyclohexane); PMMA / poly (vinylfluoride) blends; Poly (phenylene oxide) alloys; Styrene block copolymers; Polyimide; Polysulfones; Poly (vinyl chloride); Poly (dimethylsiloxane) (PDMS); Polyurethane; Unsaturated polyesters; Polyethylene; Poly (propylene) (PP); Poly (alkane terephthalates) such as poly (ethylene terephthalate) (PET); Poly (alkane naphthalate) such as poly (ethylene naphthalate) (PEN); Polyamides; Ionomers; Vinyl acetate / polyethylene copolymers; Cellulose acetate; Cellulose acetate butyrate; Fluoropolymers; Poly (styrene) -poly (ethylene) copolymers; PET and PEN copolymers, including polyolefin PET and PEN; And poly (carbonate) / aliphatic PET blends. More preferably, PEN, co-PEN, polyethylene terephthalate (PET), polycarbonate (PC), polycarbonate (PC) alloy, polystyrene (PS), heat-resistant polystyrene (PS), polymethyl methacrylate (PMMA) ), Polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), acrylonitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), Styrene Acrylonitrile Mixture (SAN), Ethylene Vinyl Acetate (EVA), Polyamide (PA), Polyacetal (POM), Phenol, Epoxy (EP), Urea.Melanin (UF.MF), Unsaturated Polyester (UP) ), Silicone (SI), elastomer, and cycloolefin polymer (COP, Japan Zeon, JSR) can be used alone or in combination. Further, the substrate may contain additives such as antioxidants, light stabilizers, thermal stabilizers, lubricants, dispersants, ultraviolet absorbers, white pigments, fluorescent whitening agents, and the like, as long as the above properties are not impaired.

Preferably, the birefringent polymer 110 may use a material that is optically birefringent and excellent in light transmittance. Preferably, the material having the same material as the base material but having birefringence may be used. For example, the substrate 100 may use isotropic co-PEN and the birefringent polymer 110 may use PEN having birefringence, and both the substrate 100 and the birefringent polymer 110 may have different optical properties. You can also use On the other hand, a method for changing an isotropic material to birefringence is commonly known and, for example, when drawn under suitable temperature conditions, the polymer molecules are oriented so that the material becomes birefringent.

The birefringent polymer may be disposed in the substrate in a plurality of stretches in one direction. 2 is a schematic view of a cross section of a cut surface of an optical modulator according to another embodiment of the present invention, wherein the birefringent polymer 210 is disposed in one direction in the substrate 200. More preferably, the birefringent polymer 210 may be disposed in the substrate perpendicular to the light source, in which case the light modulation efficiency is maximized. On the other hand, the birefringent polymers 210 aligned in a row may be disposed to be dispersed with each other as needed, the birefringent polymers 210 may be in contact with each other or fall apart, and the birefringent polymers 210 in contact with each other It may be arranged in layers in a dense form.

Further, for example, when two or more kinds of birefringent polymers having a circular cross section having different diameters are arranged, a triangle obtained by connecting the centers of three circles in contact with each other in a cross section perpendicular to the major axis direction is an inequilateral side. It becomes a triangle. Moreover, in the cross section perpendicular | vertical to the longitudinal direction of a birefringent polymer (cylindrical body), the circle | round | yen of the 1st layer and the circle | round | yen of the 2nd layer contact | connect, the circle | round | yen of the 2nd layer and the circle | round | yen of the 3rd layer also contact | connect, and the following layers also adjoin sequentially The cylindrical bodies are arranged so as to be in contact with each other, but for each birefringent polymer, the condition of "contacting each other with at least two other birefringent polymers in contact with each other on the side of the cylinder" may be satisfied. In this range, for example, the circle on the first layer and the circle on the second layer are contacted, the circle on the second layer and the circle on the third layer are separated through a supporting medium, and the circle on the third layer and the circle on the fourth layer are contacted again. It is also possible to take the composition.

The triangle connecting the centers of the three circles directly contacting each other in the cross section perpendicular to the long axis direction of the birefringent polymer should preferably have at least two sides of approximately the same length, and in particular, the triangle has approximately the same length of the three sides. It is desirable to have. In the lamination state of the birefringent polymer in the thickness direction of the optical modulator, it is preferable that a plurality of layers are laminated so as to be in contact with each other, and the birefringent polymer made of a cylinder having substantially the same diameter is densely packed. It is more preferable that there is.

Therefore, in such a more preferable embodiment, the plurality of birefringent polymers are cylindrical bodies each having substantially the same diameter in a cross section perpendicular to the major axis direction, and the birefringent polymers positioned inward from the outermost surface layer in the cross section. The other six cylinders, birefringence, are in contact with the side of the cylinder.

On the other hand, it is advantageous that the birefringent polymer has a volume of preferably 1% to 90% with respect to 1 cm 3 of the light modulator. If it is less than 1%, the light modulation effect is insignificant, and if it exceeds 90%, the amount of scattering due to the birefringence interface may increase, causing light loss.

Furthermore, 500 to 10 ¹⁰ of the birefringent polymer may be disposed in ¹ c㎥ of the light modulator. The cross-sectional diameter of the anisotropic core fibers in the birefringent polymer can also have a significant effect on light modulation. When the diameter of the cross-section of the birefringent polymer individual anisotropic core fibers is smaller than the wavelength of light, the effects of refraction, scattering, and reflection decrease, and light modulation hardly occurs. If the cross-sectional diameter of the anisotropic core fiber is too large, light is specularly reflected from the surface of the polymer and the diffusion in the other direction is very small. The cross-sectional diameter of the aligned anisotropic core fibers can vary depending on the intended use of the optics. For example, the diameter of the fiber can vary depending on the wavelength of electromagnetic radiation important for a particular application, and different fiber diameters are required to reflect, scatter or transmit visible, ultraviolet, infrared and microwave radiation.

The light modulator may preferably comprise a surface layer structured according to the purpose. 3A to 3F are cross-sectional views of the structured surface of the light modulation object of the present invention, in which the incident surface and the exit surface of the light modulation object may be flat with respect to the light emitted from the light source 300a in FIG. As shown in FIG. 3B, the birefringent polymer 320b positioned (adjacent) on the light source 300b is densely disposed, and the birefringent polymer 321b far from the light source 300b may be sparsely disposed. .

The structured surface layer may be formed on the surface from which light is emitted. The structured surface layer may be prismatic, lenticular or convex. Specifically, in FIG. 3C, the surface on which the light on the light modulator is emitted may have a curved surface 330c having a convex lens shape. The curved surface 330c may focus or defocus light transmitted through the surface. Also, as shown in FIG. 3D, the light emitting surface may have a prism pattern 330d. In this case, the birefringent polymer 320d is not formed in the surface layer 330d structured as shown in FIG. 3D, or the substrate and the surface layer as shown in FIG. 3E. The birefringent polymer 320e may be formed at all of the 330e, or the birefringent polymer 320f may be formed only at the surface layer 330f structured as shown in FIG. 3F.

It is also possible to impart scratch resistance by forming irregularities by at least one surface matte treatment of the light modulator, and more preferably, it may be matte treatment on the back surface layer of the structured surface, which adversely affects the effect of the present invention. It is condition not to generate.

On the other hand, the light transmitted through the light source can be either natural light or polarized light, and various materials exhibiting birefringence can be used as the birefringent polymer. However, the birefringent polymer is solid in view of orientation, cross-sectional stability, and durability. desirable.

As a result, in one embodiment of the present invention, by placing a birefringent polymer in an isotropic substrate, light can be efficiently modulated through a birefringent interface formed between the substrate and the birefringent polymer.

In the second embodiment of the present invention, the birefringent polymer is preferably a birefringent fiber, more preferably a birefringent fiber means an optical modulated fiber preferably comprising an anisotropic core fiber. More preferably, the light modulating fibers may include anisotropic core fibers disposed in an isotropic filler.

In the above-described embodiment, a technical idea of disposing a plurality of birefringent polymers in an isotropic substrate and modulating light according to a desired purpose through a birefringent interface between the isotropic substrate and the birefringent polymer is disclosed. However, in the case of using the optical modulation fiber including the anisotropic core fibers disposed in the filler as the above-mentioned birefringent polymer, the optical modulation fiber inside with the optical modulation effect between the birefringent optical modulation fiber and the substrate, which is the effect of the above-described embodiment The light modulation effect between the anisotropic core fibers and the isotropic filler of the can be expected, the light modulation efficiency can be significantly improved.

The fillers applicable to the present invention are optically isotropic, and more preferably, all materials of the base materials mentioned in the above-described embodiment can be used. On the other hand, the anisotropic core fibers can use all of the base materials mentioned in the birefringent polymer described above. Therefore, for example, PEN having anisotropy can be used as the core fiber and co-PEN having isotropy can be used as the filler.

On the other hand, the magnitude of the substantial coincidence or inconsistency of the refractive indices along the X, Y and Z axes in the space of the isotropic filler and the anisotropic core fiber affects the degree of scattering of the light polarized along the axis. In general, the scattering power varies in proportion to the square of the refractive index mismatch. Thus, the greater the degree of mismatch in refractive index along a particular axis, the more strongly scattered light polarized along that axis. Conversely, when the mismatch along a particular axis is small, the light polarized along that axis is scattered to a lesser extent. If the refractive index of the isotropic filler along an axis substantially coincides with the refractive index of the anisotropic or birefringent material, incident light polarized by an electric field parallel to this axis is not scattered regardless of the size, shape and density of the portion of the birefringent material. Without it will pass through the fibers. Also, when the refractive indices along that axis are substantially coincident, the light beam passes through the object without being substantially scattered. Therefore, in the present invention, the refractive index of the filler and the anisotropic core fiber preferably has a difference in refractive index in the two axial directions of 0.03 or less and the difference in the refractive index in the other one axial direction is 0.05 or more, the highest optical modulation efficiency.

Specifically, the refractive index in the x-axis direction of the substrate is nX1, the refractive index of the y-axis direction is nY1, the refractive index of the z-axis direction is nZ1, and the refractive index of the birefringent optical modulation fiber is nX2, the refractive index of the y-axis direction When the refractive indexes in the nY2 and z-axis directions are nZ2, it is preferable that at least one of these X, Y, and Z-axis refractive indices coincide. If the birefringent light modulated fiber is stretched in the X-axis direction, it is advantageous that the refractive index is preferably nX2> nY2 = nZ2 to increase the light modulation efficiency. Through this, the linearly polarized light vibrating in the direction in which the refractive index of the optical modulation fiber and the substrate coincides with each other, but the linearly polarized light vibrating in the direction in which the refractive index of the optical modulation fiber and the substrate does not coincide with the birefringent body 31. The polarization separation ability can be expressed by reflecting at the interface of the support medium 33. This principle is applied not only at the interface between the substrate and the birefringent fiber but also at the interface between the anisotropic core fiber and the isotropic filler, which is the inside of the birefringent fiber.

Further, the birefringent light modulating fibers may preferably include anisotropic core fibers disposed in the filler, wherein the refractive index in the x-axis direction of the anisotropic core fiber is nX2, the refractive index in the y-axis direction of the nY2 and z-axis directions. When the refractive index is nZ2, the refractive index in the x-axis direction of the filler is nX3, the refractive index in the y-axis direction is nY3, and the refractive index in the z-axis direction is nZ3, the absolute value of the difference between the refractive indexes of nX2 and nX3 or nY2 and nY3 is 0.05 or more. In this case, the absolute value of the difference between the refractive indices of nZ2 and nZ3 may be less than 0.03. More preferably, when the optically modulated fiber is elongated in the x-axis direction, the absolute value of the difference between the refractive indices of nX2 and nX3 is 0.1 or more and the absolute value of the difference in the refractive indexes of nY2 and nY3 and nZ2 and nZ3 is less than 0.03. It is advantageous to increase the efficiency. On the other hand, when the optical modulated fiber is elongated in the x-axis direction, the larger the difference in the refractive index on the X-axis is advantageous, the smaller the difference in the refractive index for the other axes is preferably the more consistent.

As a result, the birefringent interface between the base material, the birefringent fibers and the birefringent fibers and the filler material can be formed, and the optical modulation efficiency is remarkably improved compared to the case where the birefringent interface is formed only between the substrate and the birefringent fibers. do.

The anisotropic core fibers may preferably comprise a fiber shell surrounding the fiber core. The optically modulated object may preferably comprise a plurality of optically modulated fibers of different cross-sectional shapes, wherein at least one of the filler and the anisotropic core fiber comprises a birefringent polymeric material (eg birefringent cholesteric) It is also possible. In addition, at least one of the light modulating fibers and the anisotropic core fibers may be preferably elongated in the longitudinal direction.

As one of the preferred embodiments of the optically modulated fiber, the optically modulated fiber may be a pleated sheath composite fiber, in which case the pleated sheath composite fiber corresponds to the anisotropic core fiber in the core portion, and the sheath portion corresponds to the filler.

More specifically, Figures 4a to 4c is a cross-sectional view of the heart sheath composite fiber according to an embodiment of the present invention. In FIG. 4A, the core portion 410a corresponds to the anisotropic core fiber and the sheath portion 400a corresponds to the filler. In addition, as shown in FIG. 4B, the cross-section of the anisotropic core fiber may be a polygon such as a triangle that is not circular or elliptical. Furthermore, as shown in FIG. 4C, the heart sheath composite fiber may form concentric circles. In this case, the birefringence of the anisotropic core fibers 410c / filler 401c / anisotropic core fibers 411c / filler 400c or vice versa in order from the concentric portion, the number of birefringence As the interface increases, the effect of light modulation is remarkably increased compared to the case where only one concentric circle exists (only one anisotropic core fiber exists).

As one of the other preferred embodiments of the optically modulated fibers, the optically modulated fibers may be island-in-the-sea yarns, in which case the anisotropic core fibers correspond to the islands of the island-in-the-sea yarn and the filler corresponds to the sea portion of the island-in-the-sea yarn.

In other words, the optically modulated object arranges birefringent optically modulated fibers including anisotropic core fibers disposed in the filler material, wherein the refractive index of the anisotropic core fiber is different from the refractive index of the filler material in at least one axial direction. It is to form a plurality of birefringent interfaces between the anisotropic core fibers and the filler. At this time, the base material is preferably isotropic, and the filler also has isotropy.

In this case, the refractive indices of the sea portion and the seam portion are preferably different from each other in at least one direction, and more preferably, the refractive indices of the sea portion and the seam portion have a difference in refractive index between two axial directions of 0.03 or less and the rest. The difference in refractive index with respect to one axial direction may be 0.05 or more.

In the case of using the island-in-the-sea yarn as the light modulation fiber, the light modulation efficiency is remarkably improved than in the case of using the sheath type composite fiber. This is because the island-in-the-sea yarns form a very large number of birefringent interfaces with the isotropic sea portions corresponding to the filler because the number of islands corresponding to the anisotropic core fibers is very large. For example, if there are 10 islands inside the island, the light irradiated from the outside will cause at least 10 light modulations.

Furthermore, in the case of producing a composite fiber by twisting multiple strands or dozens of islands, for example, when manufacturing one composite fiber by twisting 10 islands or yarns, the composite fiber has 100 birefringent interfaces and at least 100 times of light. Modulation can occur. In addition, in the case of manufacturing the island-in-the-sea yarn spun into several strands, for example, if the island-in-the-sea yarn of 10 strands is manufactured, 100 birefringent interfaces exist in the composite fiber, and at least 100 light modulations may occur. The island-in-the-sea yarn of the present invention may be manufactured by a coextrusion method, but is not limited thereto.

Therefore, if the conventional island-in-the-sea yarn utilizes the remaining island portion as a micro-fine fiber by eluting the sea portion regardless of whether it is birefringent or not to produce the microfiber yarn, in the present invention, the sea portion and island portion are not eluted. It is to use island-in-the-sea yarns with different optical properties.

The cross-section in the longitudinal direction of the island-in-the-sea yarn may have any shape according to the purpose, and it may be a circular, elliptical, polygonal, and mold-shaped cross section of 0 to 100. Similarly, the cross section of the island portion of the islands, regardless of the shape of the circular, elliptical, polygonal and the degree of release may have a heteromorphic cross section of 0 ~ 100.

5A to 5I are cross-sectional views of birefringent light modulated fibers according to an embodiment of the present invention. As can be seen in Figures 5a to 5i, the shape, size, number and arrangement of the islands in the present invention can be effectively adjusted and used according to the purpose of light modulation. FIG. 5A is a cross-sectional view of a typical island-in-the-sea yarn, with an approximately circular island portion 520a partitioned through sea portion 510a. 5B has a large area of the sea portion 510b, and FIG. 5C has an elliptical shape of the island-in-the-sea yarn. In FIG. 5D, the portion 520d is elliptical and its arrangement is zigzag. In addition, although the cross-sectional view of the island-in-the-sea yarns has a rectangular structure, both polygonal structures and heteromorphic cross-sectional structures are possible.

 As illustrated in FIGS. 5E and 5F, the island portion may be located at the center of the island-in-the-sea yarn, or the sea portion may not be at the center of the island-in-the-sea yarn.

In some embodiments, the parts need not all be the same size. For example, as illustrated in FIGS. 5G and 5H, the island-in-the-sea yarns may include island portions 520g of different cross-sectional sizes. In this particular embodiment, one portion 520g is relatively larger in cross section than the other portion 521g. The portion of the figure may correspond to a group of two or more different sizes, and virtually all of the sizes may be different. Furthermore, as shown in FIG. 5I, it is also possible to add a birefringent and / or isotropic shell 530i to the drawing portion 520i.

On the other hand, the light transmitted through the birefringent island-in-the-sea yarn in the substrate may cause light modulation at the birefringent interface as described above. More specifically, FIG. 5J is a cross-sectional view showing a path of light transmitted through the birefringent island-in-the-sea yarn of the present invention. In this case, the P wave (dotted line) is transmitted without being affected by the interface between the substrate and the birefringent island-in-the-sea yarn and the interface between the island and sea within the birefringent island-in-the-sea yarn, while the S-wave (solid line) is transmitted through the substrate and the birefringence. The modulation of light occurs due to the influence of the birefringence interface between the boundary surface of the island and the sea portion inside the islands of the islands and / or birefringent islands. As a result, a large number of S waves are returned to the light source through light modulation such as reflection, scattering, or refraction, and the returned S waves are reflected as S waves or P waves and pass through the luminance-enhanced film again. As a result, the use of birefringent island-in-the-sea yarn is superior to the use of conventional birefringent fibers, and the efficiency of brightness enhancement is excellent, and the optical properties of the island portion and the sea portion in the birefringent island-in-the-sea island are different so that the birefringence in the island-in-the-sea yarn is different. What can form an interface is that the brightness enhancement efficiency can be remarkably improved as compared with the case where it is not.

On the other hand, the island portion is preferably arranged in a plurality in the island-in-the-sea yarn, the area ratio of the sea portion and the island portion may be preferably from 2: 8 to 8: 2. The thickness of the island-in-the-sea yarn is preferably 0.3 to 20 denier, and preferably 500 to 4,000,000 pieces / cm 3 may be disposed in the light modulator. In addition, the refractive index of the sea portion may preferably coincide with the refractive index of the substrate of the light modulator.

6A and 6B, the island-in-the-sea yarn may be woven preferably with weft yarns 610a and 610b and warp yarns 600a and 610b, wherein one of the weft yarns and warp yarns is between the islands and the other is isotropic fiber. It may be. The weft or warp yarn is preferably the island-in-the-sea yarn 1 to 200 strands can be formed by gathering.

As another preferred embodiment of the optically modulated fiber, the birefringent fiber may be a divided yarn consisting of an isotropic filling portion and an anisotropic split portion partitioned therethrough.

Preferably, a plurality of isotropic fillers may be formed, and a plurality of isotropic fillers may be preferably parallel or intersecting within the divided yarns. As a result, it is also possible for the cross section of the divided yarn to have a circular, elliptical, fan-shaped or mold-shaped cross section having a degree of release of 0 to 100.

More specifically, FIGS. 7A to 7E are divided as cross-sectional views of divided yarns according to one embodiment of the present invention, and in FIG. 7D, the isotropic filler 700d is formed in a 'Y' shape. In FIG. 7A, the isotropic filling part 700a divides the divided yarns vertically and divides the divided yarns into two anisotropic splitting parts 710a. In FIG. 7B, the isotropic filling part 700b is divided into two anisotropic splitting parts 710b by horizontally dividing the divided yarns. In FIG. 7C, the isotropic filling portion 700c is formed in a '+' shape, and in FIG. 7D, the isotropic filling portion 700d is formed as “Y”, and in FIG. 7E, the plurality of isotropic filling portions 700e are vertically formed. It is also possible to form and in this case the plurality of isotropic filler 700e may or may not be parallel.

In the second embodiment of the present invention, the optically modulated fiber, which is a birefringent polymer, is produced through three steps of spinning and then fabricating the fiber into a fabric or beam arranged in one direction, and impregnating and fixing the substrate to the substrate. can do. The radiation stretching step of the light modulating fiber and the manufacturing step of the fabric or the beam may be performed by a known method, and there is no particular limitation. In impregnating and fixing a fabric or a beam to a substrate, a method of polymerizing the precursor of the support medium with light and / or heat and then polymerizing the precursor of the support medium with light and / or heat after immersing the nonwoven fabric in the monomer and / or oligomer as the precursor of the substrate. After immersing the fabric or the beam, a method of removing the solvent, a method of making the support medium a fine powder, impregnating the fine powder into the fabric or the beam, and then melting or the like may be employed.

As another method, the present invention can also be carried out by a melt extrusion method. Specifically, in the case where the shape of the cross section perpendicular to the long axis direction of the birefringent polymer dispersed and arranged in the substrate is a polygon, the extruder discharge port is partitioned into a plurality of molds, and the resin constituting the birefringent polymer is spaced one space apart. It is possible to adopt a release extrusion method in which the resin is extruded into a polygonal shape from the mold and the resin constituting the substrate is extruded from the mold in between. In the case where the shape of the cross section perpendicular to the long axis direction of the birefringent polymer dispersed in the support medium is substantially caused, the extruder discharge port is partitioned into a plurality of caps, and the resin constituting the birefringent polymer is continuous in the cross section. A mold release extrusion method can be employed in which the mold is extruded from a mold into a round rod and the resin constituting the substrate is extruded from the mold in between. In these cases, the extruder and the mold may be designed such that different kinds of molten resins are alternately extruded into a predetermined form from the mold of the extruder to form a dispersion arrangement as described above.

As a result, in the case of using the optical modulation fiber 810 including the anisotropic core fibers disposed in the isotropic filler as the birefringent fibers as shown in FIG. 8, the birefringent fibers together with the optical modulation effect between the substrate 800 and the birefringent fibers Since the optical modulation effect between the isotropic filler and the anisotropic core fiber occurs inside, the optical modulation effect of the optical modulation object is remarkably improved. In particular, in the case of using the island-in-the-sea yarn as the light modulating fiber, a plurality of islands may be disposed inside the island-in-the-sea yarn. In this case, the optical modulation effect is incomparably superior to that of using ordinary birefringent fibers.

Hereinafter, the present invention will be described in detail by Examples and Experimental Examples. The following Examples and Experimental Examples are only illustrative of the present invention, and the scope of the present invention is not limited to the following Examples and Experimental Examples.

<Example 1>

After polymerizing the PEN resin of IV 0.53, yarn of undrawn yarn 150/24 was prepared. At this time, the spinning temperature was 305 ℃, spinning speed was applied by applying 1500 M / min. The obtained undrawn yarn was stretched three times at a temperature of 150 ° C. to produce 50/24 drawn yarn. The stretched PEN fiber shows birefringence, and the refractive indices in each direction are nx = 1.88, ny = 1.57 and nz = 1.57. 4,200 strands of PEN 50/24 drawn yarn (24 yarns act as a group, so the actual number of fibers is 100,800 strands of 4,200 * 24) are wound side by side on a beam of 762mm width, and the wound beam It is placed on the top of the PC alloy sheet, which is matted on the back, and then laminated with a constant tension. At this time, the refractive index of the PC alloy sheet is 1.57. Subsequently, a mixed UV cured coating resin of an epoxy acrylate having a refractive index of 1.54 and a urethane acrylate is given to the point where the fiber is laminated to the PC alloy sheet and the mirror roll, and UV cured through primary and secondary birefringence. A fused sheet was prepared in which the adult fibers were laminated. The coating resin exhibits a refractive index of 1.54 before the UV coating curing but a refractive index of 1.57 after curing. Through this, a sheet-shaped optical modulator 40 mu m thick Prepared.

<Example 2>

A sheet-like light modulating object was prepared in the same manner as in Example 1 except that a deep sheath-type composite fiber was used in place of the normal stretched birefringent PEN fiber. In this case, specifically, the core portion of the core sheath-type composite fiber is PEN (nx = 1.88, ny = 1.57, nz = 1.57), and the sheath portion is Co-PEN (nx = 1.57) whose refractive index is not changed by the stretching treatment. , ny = 1.57, nz = 1.57). After the composition is spun into 150/24 undrawn yarn, the drawn yarn 50/24 can be obtained through three times stretching.

<Example 3>

A sheet-like light modulator was prepared in the same manner as in Example 1 except that an island-in-the-sea yarn was used in place of the usual elongated birefringent PEN fiber. The island-in-the-sea yarn used at this time was anisotropic PEN (nx = 1.88, ny = 1.57, nz = 1.57) as a part inside the filler of isotropic Co-PEN (nx = 1.57, ny = 1.57, nz = 1.57) 37 were deployed. After the composition is spun into 150/24 undrawn yarn, the drawn yarn 50/24 can be obtained through three times stretching.

<Example 4>

A sheet-shaped light modulator was manufactured in the same manner as in Example 3 except that the number of the drawing parts was 217.

<Example 5>

A sheet-like optical modulator was prepared in the same manner as in Example 4 except that four islands of the seaweed yarn used in Example 4 (50/24 × 4) were obtained and 200/96 yarn was used. .

<Example 6>

In order to simplify the process of incorporating the fiber used in Example 4 into the sheet, using a beam obtained by winding so that 4,200 strands are arranged side by side in a width of 762 mm as in Example 1, the weft density of 50 / inch The weaving was made with a plain weave to minimize the weft density. The fabric thus prepared was laminated on the sheet while being rolled through the roll on the sheet extrusion die as in Example 1, the coating liquid was applied, and then cured to prepare a sheet-shaped light modulator.

<Example 7>

Using PEN (nx = 1.88, ny = 1.57, nz = 1.57) and Co-PEN (nx = 1.57, ny = 1.57, nz = 1.57) as anisotropic splits in place of conventional stretched birefringent PEN fibers, isotropic A sheet-like light modulator was manufactured in the same manner as in Example 1 except that a split yarn using Co-PEN (nx = 1.57, ny = 1.57, nz = 1.57) was used as the filling part.

<Example 8>

A structured surface layer was formed on the light modulator of Example 5 to improve the light utilization efficiency of the light modulator. A sheet-shaped light modulator was manufactured in the same manner as in Example 5 except that the structured surface layer was formed using a prism pattern roll during the manufacturing of the fusion sheet.

Comparative Example 1

A sheet-like light modulator was prepared in the same manner as in Example 1 except that 150/24 unstretched isotropic fibers composed of Co-PEN (nx = ny = nz = 1.57) were used instead of the birefringent fibers. .

Comparative Example 2

The sheet-like optical modulation was carried out in the same manner as in Example 3 except that an undrawn yarn having an island-in-water structure composed of PET (nx = ny = nz = 1.57) and C0-PEN (nx = ny = nz = 1.57) was used. The object was prepared.

Experimental Example

The following physical properties of the optical modulators prepared through Examples 1 to 8 and Comparative Examples 1 to 2 were evaluated, and the results are shown in Table 1 below.

1. Luminance

In order to measure the brightness of the prepared optical modulation object was performed as follows. After assembling the panel on a 32 "direct backlight unit equipped with a diffuser plate, two diffuser sheets, and a light modulator, the luminance was measured at nine points using Topcon's BM-7 measuring instrument.

2. Transmittance

Permeability was measured by ASTM D1003 method using COH300A analysis equipment from NIPPON DENSHOKU, Japan.

3. Polarization degree

The degree of polarization was measured using an OTSKA RETS-100 analyzer.

4. Water absorption rate

The change in weight percent of the sample before and after the treatment was measured after immersion in water at 23 ° C. for 24 hours according to ASTM D570.

5. Seatum

       The light modulator was assembled into a 32-inch backlight unit and left for 96 hours in a constant temperature and humidity chamber at 60 ° C and 75%. After decomposition, the degree of light modulation was observed visually and classified into ○, △, and ×.

        ○: Good, △: Normal, ×: Poor

6. UV resistance

       Using the SMDT51H of Semyung Baektron's SMDT51H, the output of 130mW UV lamp (365nm) was irradiated at 10cm height for 10 minutes, and then the YI (Yellow Index) before and after treatment was measured using NIPPON DENSHOKU's SD-5000 analysis equipment. Yellowness was evaluated.

TABLE 1

Luminance Transmittance Polarization degree Water absorption Situm UV resistance Example 1 419.50nit 58.53% 68.50% 0.3 Good 4.4 Example 2 434.86nit 57.04% 71.00% 0.3 Good 4.5 Example 3 465.92nit 54.03% 76.08% 0.3 Good 4.3 Example 4 494.36nit 51.28% 80.72% 0.3 Good 4.4 Example 5 512.02nit 49.57% 83.60% 0.3 Good 4.3 Example 6 502.73nit 56.18% 72.45% 0.3 Good 4.4 Example 7 435.25nit 53.13% 71.60% 0.3 Good 4.5 Example 8 540.12nit 49.74% 73.60% 0.3 Good 4.5 Comparative Example 1 391.17nit 87.60% 0.67% 0.3 Good 4.5 Comparative Example 2 389.80nit 88.72% 0.62% 0.3 Good 4.5

As can be seen from Table 1, Examples 1 to 8 including birefringent fibers were superior in optical properties to Comparative Examples 1 to 2 including isotropic fibers. Further, it can be seen that the optical properties are significantly increased in the optical modulation objects of Example 3 or less using island-in-the-sea yarn compared to Example 1 using a single birefringence yarn.

The light modulating object of the present invention can be used anywhere if the use of light modulation is required, and can be mainly used in optical sheets of image output devices such as cameras, LCDs, and liquid crystals of mobile phones.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims. .

1 is a schematic diagram of a cross section of a cut surface of an optical modulator according to an embodiment of the present invention.

Figure 2 is a schematic diagram of a cross section of the cut surface of the optical modulation object according to another embodiment of the present invention.

3A-3F are cross-sectional views of the structured surface of the light modulator object of the present invention.

4A to 4C are cross-sectional views of birefringent light modulated fibers according to one embodiment of the present invention.

5A to 5I are cross-sectional views of birefringent light modulated fibers according to an embodiment of the present invention.

5J is a cross-sectional view showing a path of light incident on the birefringent island-in-the-sea yarn of the present invention.

6A and 6B are layout views of birefringent light modulating fibers according to an embodiment of the present invention.

7A to 7E are cross-sectional views of birefringent light modulated fibers according to one embodiment of the present invention.

8 is a schematic diagram of a cross section of a cut surface of an optical modulator according to another embodiment of the present invention.

<Short description of the symbols in the drawings>

100, 200: base material 110, 210: birefringent polymer

Claims (65)

A light modulating object characterized in that the birefringent polymer is disposed in the substrate. The optical modulator of claim 1, wherein the substrate is isotropic. The method of claim 2, wherein the substrate is polyethylene naphthalate (PEN), polyethylene naphthalate copolymer (co-PEN), polyethylene terephthalate (PET), polyethylene terephthalate copolymer (co-PET), polycarbonate (PC) , Polycarbonate (PC) alloy, polystyrene (PS), heat-resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), acrylic Ronitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile mixture (SAN), ethylene vinyl acetate (EVA), polyamide (PA), The polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyester (UP), silicone (SI), elastomer and cycloolefin polymer, characterized in that any one or more of the above. Light modulation objects. The method of claim 1, wherein the birefringent polymer is polyethylene naphthalate (PEN), polyethylene naphthalate copolymer (co-PEN), polyethylene terephthalate (PET), polyethylene terephthalate copolymer (co-PET), poly Carbonate (PC), polycarbonate (PC) alloy, polystyrene (PS), heat-resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene ( PE), acrylonitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile mixture (SAN), ethylene vinyl acetate (EVA), polyamide At least one of (PA), polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyester (UP), silicone (SI), elastomer and cycloolefin polymer And the light modulator. The optical modulator of claim 1, wherein a plurality of the birefringent polymers are arranged in one direction in the substrate. 6. The light modulator of claim 5, wherein the birefringent polymer is disposed in the substrate perpendicular to the light source. The method of claim 1, wherein the birefringent polymer has the light modulation object, characterized by being contained in a volume of 1 to 90% of the total optical modulation object. The optical modulator of claim 1, wherein 500 to 10 ¹⁰ birefringent polymers are disposed with respect to 1 cm 3 of the optical modulator. 2. The light modulating object of claim 1, wherein the light modulating object comprises a structured surface layer. 10. The light modulator of claim 9, wherein the structured surface layer is formed on a surface from which light is emitted. 10. The light modulating object of claim 9, wherein the structured surface layer is prismatic in shape.  12. The light modulating object of claim 11, wherein the structured surface layer is a prism of irregular shape.  10. The light modulator of claim 9, wherein the structured surface layer is lenticular in shape.   14. The light modulator of claim 13, wherein the structured surface layer is irregular lenticular shape. 10. The optical modulator of claim 9, wherein the structured surface layer is convex or micro lens shaped. 16. The light modulator of claim 15, wherein the structured surface layer is irregular convex or micro lens shaped. 10. The light modulating object of claim 9, wherein the birefringent polymer is or is not disposed on the structured surface layer. The optical modulator according to claim 1, wherein a mat treatment is applied to at least one surface of the optical modulator. The light modulator of claim 1, wherein the light modulated object transmits light irradiated from a light source and the transmitted light is natural light or polarized light. The optical modulator of claim 1, wherein the birefringent polymer is disposed in a stack in the substrate. The optical modulator of claim 1, wherein the birefringent polymer is dispersed in the optical modulator. The optical modulator of claim 1, wherein the birefringent polymer is a birefringent fiber. 23. The optical modulator of claim 22, wherein the birefringent fibers are optically modulated fibers comprising anisotropic core fibers. 24. The light modulating object of claim 23, wherein said light modulating fiber comprises anisotropic core fibers disposed within a filler. 25. The optical modulator of claim 24, wherein the filler is isotropic. The method of claim 25, wherein the filler is polyethylene naphthalate (PEN), polyethylene naphthalate copolymer (co-PEN), polyethylene terephthalate (PET), polyethylene terephthalate copolymer (co-PET), polycarbonate (PC) , Polycarbonate (PC) alloy, polystyrene (PS), heat-resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), acrylic Ronitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile mixture (SAN), ethylene vinyl acetate (EVA), polyamide (PA) , Polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyester (UP), silicone (SI), elastomer and cycloolefin polymer, characterized in that at least one of The light modulator. The method of claim 24, wherein the anisotropic core fibers are polyethylene naphthalate (PEN), polyethylene naphthalate copolymer (co-PEN), polyethylene terephthalate (PET), polyethylene terephthalate copolymer (co-PET), polycarbonate ( PC), polycarbonate (PC) alloy, polystyrene (PS), heat-resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE) , Acrylonitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile mixture (SAN), ethylene vinyl acetate (EVA), polyamide (PA ), Polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyester (UP), silicone (SI), elastomer, and cycloolefin polymer, and is anisotropic The optical modulation object having a. The optical modulator according to claim 24, wherein the refractive index of the filler and the anisotropic core fiber is 0.01 or less in difference in refractive index in two axial directions and 0.03 or more in difference in refractive index in the other one axial direction. 25. The optical modulator of claim 24, wherein the anisotropic core fibers comprise a fiber envelope surrounding the fiber core. 25. The optical modulator of claim 24, wherein the optical modulator includes a plurality of optical modulator fibers having different cross-sectional shapes. 25. The light modulating object of claim 24, wherein at least one of the filler and the anisotropic core fibers comprises a birefringent polymeric material. 25. The light modulating object of claim 24, wherein at least one of the polymeric light modulating fiber and the anisotropic core fiber is elongated in the longitudinal direction. 25. The light modulating object of claim 24, wherein the light modulating fiber is a sheath sheath composite fiber. 34. The optical modulator according to claim 33, wherein the core sheath-type composite fiber corresponds to an anisotropic core fiber in the core portion and the filler portion to the filler material in the core portion. 25. The optical modulator according to claim 24, wherein the light modulating fiber is island-in-the-sea yarn, the anisotropic core fiber corresponds to the island portion of the island-in-the-sea yarn, and the filler corresponds to the sea portion of the island-in-the-sea yarn. The optical modulator of claim 35, wherein the refractive index of the sea portion and the island portion is different from each other in refractive index in at least one direction. 36. The optical modulator of claim 35, wherein the refractive index of the sea portion and the island portion has a difference in refractive index of two axial directions of 0.03 or less and a difference in refractive index of one remaining axial direction of 0.05 or more. 36. The method of claim 35, wherein the area ratio of the sea portion to the island portion is 2: 8 to 8: the light modulator, characterized in that 2. 36. The optical modulator of claim 35, wherein a plurality of islands are disposed in the island-in-the-sea yarn. 36. The light modulating object of claim 35, wherein said sea portion is isotropic and said island portion is anisotropic. 36. The method of claim 35, wherein the sea portion is polyethylene naphthalate (PEN), polyethylene naphthalate copolymer (co-PEN), polyethylene terephthalate (PET), polyethylene terephthalate copolymer (co-PET), polycarbonate (PC ), Polycarbonate (PC) alloy, polystyrene (PS), heat-resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), Acrylonitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile mixture (SAN), ethylene vinyl acetate (EVA), polyamide (PA) , Polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyester (UP), silicone (SI), elastomer and cycloolefin polymer, characterized in that at least one of The light modulator. 36. The method of claim 35 wherein the doped portion is polyethylene naphthalate (PEN), polyethylene naphthalate copolymer (co-PEN), polyethylene terephthalate (PET), polyethylene terephthalate copolymer (co-PET), polycarbonate (PC ), Polycarbonate (PC) alloy, polystyrene (PS), heat-resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), Acrylonitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile mixture (SAN), ethylene vinyl acetate (EVA), polyamide (PA) At least one anisotropic, polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyester (UP), silicone (SI), elastomer and cycloolefin polymer And the light modulator. 36. The method of claim 35, wherein the thickness of the island-in-the-sea yarn is 0.3 to 20 And said denier being denier. 36. The optical modulation object of claim 35, wherein 500 to 4,000,000 pieces / cm 3 of the island-in-the-sea yarn are disposed in the light modulation object. 36. The optical modulator of claim 35, wherein the cross-sectional view of the island-in-the-sea yarns has a circular or elliptical shape. 36. The optical modulator of claim 35, wherein the cross-sectional view of the island-in-the-sea yarns has a deformed cross section. 36. The light modulating object according to claim 35, wherein the cross section of the drawing portion has a deformed cross section. 36. The optical modulator of claim 35, wherein the refractive index of the sea portion matches the refractive index of the substrate of claim 1. 36. The light modulating object of claim 35, wherein the island-in-the-sea yarn is woven in a warp yarn and a warp yarn. 50. The light modulator according to claim 49, wherein one of the weft yarn and the warp yarn is the island-in-the-sea yarn and the other is isotropic fiber. The light modulating object of claim 49, wherein the weft or warp yarn is formed by gathering 1 to 200 strands of the island-in-the-sea yarn. 23. The optical modulator of claim 22, wherein the birefringent fibers are divided yarns comprising an isotropic filler and anisotropic splits partitioned therethrough. 53. The light modulator according to claim 52, wherein a cross section of the divided yarn is a cross section. The light modulating object of claim 52, wherein a plurality of the anisotropic partitions are formed. 53. The optical modulator of claim 52, wherein the plurality of isotropic fillers are parallel or intersect within the split yarns. Birefringent photomodulation fibers disposed within the substrate; And The birefringent light modulating fibers include anisotropic core fibers disposed in the filler, wherein the refractive index of the anisotropic core fiber is different from the refractive index of the filler in at least one axial direction, and a plurality of birefringences between the anisotropic core fiber and the filler. An optical modulator that forms an interface. 57. The light modulator of claim 56, wherein the substrate is isotropic. 57. The light modulating object of claim 56, wherein said filler is isotropic. 57. The method of claim 56, wherein the refractive index of the anisotropic core fibers in the two axial direction is less than 0.03 of the refractive index of the filler, the other one in the axial direction is characterized in that the difference between the refractive index of the filler is 0.05 or more The optical modulation object. The refractive index in the x-axis direction of the substrate is nX1, the refractive index in the y-axis direction is nY1, the refractive index of the z-axis direction is nZ1, the refractive index of the birefringent optical modulation fiber is nX2, the refractive index in the y-axis direction is nY2, When the refractive index in the z-axis direction is nZ2, at least any one of these X, Y, and Z-axis refractive indexes coincide. 61. The optical modulator of claim 60, wherein nX2> nY2 = nZ2. 61. The light modulating object of claim 60, wherein the birefringent light modulating fiber comprises anisotropic core fibers disposed within the filler. 61. The method of claim 60, wherein the refractive index in the x-axis direction of the anisotropic core fiber is nX2, the refractive index in the y-axis direction is nY2 and the refractive index in the z-axis direction is nZ2, the refractive index of the filler in the x-axis direction is nX3, y-axis direction When the refractive index is nY3 and the refractive index in the z-axis direction is nZ3, the absolute value of the difference between the refractive indexes of nX2 and nX3 or nY2 and nY3 is 0.15. The optical modulation object, characterized in that above. 61. The optical modulator of claim 60, wherein an absolute value of the difference between the refractive indices of nZ2 and nZ3 is less than 0.03. Light source; And a birefringent light modulating fiber disposed above the light source, the birefringent light modulating fiber including an anisotropic core fiber in the substrate, and modulating the light incident from the light source.

Images