KR20090056103A - Multi functional optical film with nano-fiber layer and electrohydrodynamic process thereof - Google Patents

Multi functional optical film with nano-fiber layer and electrohydrodynamic process thereof Download PDF

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KR20090056103A
KR20090056103A KR1020070123096A KR20070123096A KR20090056103A KR 20090056103 A KR20090056103 A KR 20090056103A KR 1020070123096 A KR1020070123096 A KR 1020070123096A KR 20070123096 A KR20070123096 A KR 20070123096A KR 20090056103 A KR20090056103 A KR 20090056103A
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optical film
substrate
nanofiber layer
nanofibers
electrospinning
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KR1020070123096A
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Korean (ko)
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KR100934920B1 (en
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김근형
손준곤
김완두
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한국기계연구원
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2333/00—Polymers of unsaturated acids or derivatives thereof
    • B32B2333/04—Polymers of esters
    • B32B2333/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2369/00—Polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures

Abstract

A multi functional optical film with nano-fiber layer and an electro hydrodynamic process thereof are provided to form a uniform pattern by attaching a nono fiber having improved arrangement to a substrate. An optical film, forming a pattern on a substrate to improve brightness, is composed of a base substrate(20) and a nono fiber layer on the base substrate. A nano fiber layer condenses a light, and the diffuse sheet layer(40) including a plurality of beads(41) is formed at the bottom of the base substrate. The diffuse sheet layer is formed in order to diffuse the light, and the base substrate is made of PET (PolyEthylene Terephthalate) material. The nano fiber layer and diffuse sheet layer are formed with PMMA (polymethyl methacrylate), PET, and PC (polycarbonate) material.

Description

전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름 및 그 제조방법{Multi Functional Optical Film with Nano-fiber layer and Electrohydrodynamic process thereof}Multifunctional optical film with nanofiber layer using electrospinning and its manufacturing method {Multi Functional Optical Film with Nano-fiber layer and Electrohydrodynamic process}

본 발명은 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름 및 그 제조방법에 관한 것으로, 더 상세하게는 광학필름 일면에 집광을 위한 패턴형성 방법으로 나노섬유를 배열시킴으로서 신속한 가공이 가능하고, 광학필름의 타면에는 비드층을 형성하여 조사되는 광원으로부터의 빛을 공급받아 확산시키는 확산시트역할을 수행하도록 하는 등 신속한 가공에 의한 제조비용절감과 균일하면서 향상된 휘도를 제공할 수 있는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름 및 그 제조방법에 관한 것이다.The present invention relates to a multifunctional optical film having a nanofiber layer formed using electrospinning and a method of manufacturing the same, and more particularly, by rapidly arranging nanofibers in a pattern forming method for condensing light on one surface of an optical film, an optical film is possible. On the other side of the nanofibrous layer using electrospinning to provide a uniform and improved luminance and to reduce manufacturing costs by providing a bead layer and to perform a diffusion sheet that receives and diffuses light from the light source irradiated. The formed multifunctional optical film and a method for manufacturing the same.

인체내 지금까지 사용되는 전자 디스플레이 중 가장 대표적인 것은 TV나 컴퓨터 모니터 등에 사용되고 있는 CRT(Cathode Ray Tube)를 들 수 있다. 그러나 현재 CRT는 그 부피나 중량 때문에 휴대가 곤란하고 소비전력이 높으며 높은 구동 전압으로 인한 사용상의 제약이 많은 편이기 때문에 그 한계를 극복하기 위한 다양한 평판 표시소자의 개발이 진행되고 있다.The most representative electronic display used in the human body so far is the CRT (Cathode Ray Tube) used in TVs and computer monitors. However, since CRTs are difficult to carry due to their volume and weight, high power consumption, and many restrictions on use due to high driving voltages, various flat panel display devices have been developed to overcome the limitations.

액정디스플레이는 표면에 투명전극을 형성한 2개의 유리기판 사이에 액정을 주입한 것으로서 외부로부터 전계를 가해 액정을 회전시켜 빛의 투과율을 제어하는 디스플레이 장치를 말한다. 상기 장치에 사용되는 액정표시패널은 얇고, 가벼우며 소비 전력이 낮은 장점으로 인해 여타 다른 표시소자보다 강점을 가지고 있다. 그러나 액정표시패널은 CRT와 달리 화소가 스스로 발광하는 것이 아닌 빛의 투과율을 조절하는 장치이다. 따라서 액정 패널 뒷면에 백라이트 유닛을 설치하여 그것을 광원으로 사용하고, 전면부의 액정에 전압을 인가하여 빛의 투과 양을 제어함으로써 화면을 표시할 수 있게 된다.A liquid crystal display is a display device in which a liquid crystal is injected between two glass substrates on which a transparent electrode is formed on a surface, and a liquid crystal is rotated by applying an electric field from the outside to control light transmittance. The liquid crystal display panel used in the device has advantages over other display devices due to its thin, light, and low power consumption. However, unlike the CRT, the liquid crystal display panel is a device that adjusts the transmittance of light rather than emitting light by itself. Therefore, the backlight unit may be installed on the rear side of the liquid crystal panel and used as a light source, and the screen may be displayed by controlling the amount of light transmitted by applying a voltage to the liquid crystal in the front portion.

상기 장치는 백라이트유닛과 광학필름으로 구성되는 것으로, 상기 백라이트유닛에는 형광램프와 도광판이 형성되어 빛을 방출하도록 하고, 방출된 빛은 광확산판과 프리즘시트로 구성된 광학필름과 LCD 패널을 통과하면서 이미지로 표시된다.The apparatus is composed of a backlight unit and an optical film, the backlight unit is formed with a fluorescent lamp and a light guide plate to emit light, and the emitted light passes through the optical film and LCD panel consisting of a light diffusion plate and a prism sheet Displayed as an image.

대부분의 디스플레이는 정면을 향하는 빛을 많게 하여 휘도를 증가시킴으로 써 깨끗하고 뚜렷한 화상을 제공한다. 상기 휘도를 증가시키기 위한 방법으로는 광원을 여러개 사용하거나 보다 밝은 광원을 사용하는 것이지만, 광원추가에 따른 제품 단가의 상승 요인과 밝은 광원을 구동시키는데 더 많은 전류가 필요하기 때문에 광원추가에 따른 비용이 발생하고, 더 많은 전류 소모에 의한 휴대용 장치의 사용시간이 감소하는 등의 부정적인 측면을 가지고 있다.Most displays provide a clear, sharp image by increasing the brightness by increasing the amount of light facing the front. The method of increasing the brightness is to use a plurality of light sources or to use a brighter light source, but the cost of adding a light source is more expensive because the increase in product cost due to the addition of the light source and more current is required to drive the bright light source. And the decrease in the usage time of the portable device due to more current consumption.

그러므로 기존의 광원을 그대로 유지하면서 휘도를 증가시키기 위한 방법은, 백라이트 유닛의 광원에서 발생하는 무질서한 방향의 광원을 사용자가 원하는 방향으로 정렬시켜 사용함으로써 가능하다. Therefore, the method for increasing the brightness while maintaining the existing light source is possible by using the light source in the disordered direction generated from the light source of the backlight unit aligned in the direction desired by the user.

액정 디스플레이 장치에서 휘도 증가를 목적으로 사용 가능한 프리즘시트(1)를 제시한 대표적인 종래 기술인 미국 특허 제4,542,449 및 대한민국 공개특허 제1987-0005258호는 도7 에서 도시한 바와 같이 한쪽 면에는 패턴(2)을 형성하고 다른 면(3)은 매끄럽게 형성하며, 상기 구조화된 표면에는 나란히 배열된 복수의 이등변삼각형 프리즘의 경사면이 상기 매끄러운 면과 약 45도의 각을 이루며 선형 배열되도록 구성하였다. Representative prior art US Pat. No. 4,542,449 and Korean Laid-Open Patent Publication No. 1987-0005258, which present a prism sheet 1 usable for the purpose of increasing luminance in a liquid crystal display device, have a pattern 2 on one side thereof as shown in FIG. And the other side 3 is formed smoothly, and the structured surface is configured such that the inclined surfaces of the plurality of isosceles triangle prisms arranged side by side are linearly arranged at an angle of about 45 degrees with the smooth surface.

이러한 패턴은 휘도를 증가시킬 수 있지만, 패턴과 접하는 다른 기판과의 마찰에 의해 광입사면에 스크래치가 발생될 수 있으며, 패턴자체도 정밀하고 균일하게 가공하기 힘든 단점이 있다. Such a pattern may increase luminance, but a scratch may be generated on the light incident surface by friction with another substrate in contact with the pattern, and the pattern itself may be difficult to process precisely and uniformly.

상기 과제를 해소하기 위한 본 발명의 전기방사를 이용한 나노섬유층이 형성 된 다기능 광학필름 및 그 제조방법은, Multifunctional optical film and a method for manufacturing the nanofiber layer using the electrospinning of the present invention for solving the above problems,

기판에 패턴을 형성하여 휘도를 향상시키는 광학필름에 있어서, 베이스 기판과; 상기 베이스기판의 상부면에 부착되어 빛을 집광시키는 나노섬유층;을 포함하여 구성되며, 상기 기판 하부면에 빛을 확산시키기 위해 다수의 비드가 부착된 확산시트층이 더 형성될 수 있다. An optical film forming a pattern on a substrate to improve brightness, the optical film comprising: a base substrate; And a nanofiber layer attached to an upper surface of the base substrate to condense light, and a diffusion sheet layer having a plurality of beads attached thereto to diffuse light on the lower surface of the base substrate.

또한, 기판에 집광부를 형성하여 광학필름을 제조하는 방법에 있어서, 기판 준비과정과; 상기 기판 상부면에 나노섬유를 부착하여 집광이 이루어지도록 하는 나노섬유부착과정;을 포함하여 이루어진다.In addition, a method of manufacturing an optical film by forming a light collecting part on a substrate, the method comprising: preparing a substrate; Nanofiber attachment process for attaching nanofibers to the upper surface of the substrate to collect light.

상기 나노섬유가 부착된 기판의 하부면에 빛의 확산을 위해 다수의 비드를 부착시키는 확산시트층형성과정이 더 이루어질 수 있고, 상기 나노섬유부착과정에서 기판에 부착되는 나노섬유는 섬유배열을 일정하게 하기 위해 전처리과정이 더 이루어질 수 있다.Diffusion sheet layer forming process for attaching a plurality of beads for the diffusion of light to the lower surface of the nanofiber attached substrate may be further formed, the nanofibers attached to the substrate in the nanofiber attachment process uniform fiber arrangement The pretreatment process may be further performed to make this possible.

이상에서 상세히 기술한 바와 같이 본 발명의 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름 및 그 제조방법은,As described in detail above, the multifunctional optical film and a method of manufacturing the nanofiber layer formed using the electrospinning of the present invention,

방사되는 나노섬유를 전극을 갖는 롤러에 권취되면서 회전력과 전기장에 의해 직선으로 배열되도록 하고, 배열성을 향상시킨 나노섬유를 기판상부에 부착시켜 균일한 패턴을 형성되게 함으로써 광원을 집광시키는 프리즘시트로 활용되도록 하고, 상기 기판 하부에는 PMMA로 형성된 나노크기의 비드를 부착한 확산시트층을 형 성하여 빛의 확산이 용이하게 이루어지도록 하는등 균일한 휘도의 제공과 제조시간 단축에 의한 비용절감 효과를 제공하는 유용한 제품 및 제조방법의 제공이 가능하게 되었다.It is a prism sheet that condenses the light source by winding the emitted nanofibers on a roller having an electrode and arranging them in a straight line by rotational force and electric field, and attaching nanofibers with improved arrangement on the substrate to form a uniform pattern. In the lower part of the substrate, a diffusion sheet layer having nano-sized beads formed of PMMA is formed to facilitate diffusion of light, thereby providing cost reduction by providing uniform luminance and shortening manufacturing time. It is possible to provide useful products and manufacturing methods to provide.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

도 1a는 본 발명에 따른 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름의 제조방법을 도시한 흐름도이고, 도 1b는 나노섬유층이 형성된 광학필름의 단면도이다.1A is a flowchart illustrating a method of manufacturing a multifunctional optical film having a nanofiber layer formed using electrospinning according to the present invention, and FIG. 1B is a cross-sectional view of an optical film having a nanofiber layer formed thereon.

도시된 바와같이 본 발명의 광학필름(10) 제조방법은 베이스 기판 준비과정(P1)과, 상기 준비된 기판에 나노섬유를 부착하는 과정(P2)으로 이루어진다.As shown, the manufacturing method of the optical film 10 of the present invention includes a base substrate preparation process P1 and a process of attaching nanofibers to the prepared substrate (P2).

상기 기판준비과정(P1)에서의 베이스 기판(20)은 다양한 재질을 사용할 수 있으나, 기계적강도가 크고, 내열성과 내한성, 내습성 등이 우수한 PET(polyethylene Terephthalate) 등을 사용하는 것이 바람직하다.The base substrate 20 in the substrate preparation process P1 may use various materials, but it is preferable to use PET (polyethylene terephthalate) having a high mechanical strength and excellent heat resistance, cold resistance, and moisture resistance.

또한 상기 기판의 상부에는 패턴을 형성시키기 위해 나노섬유(31)가 부착된다. 상기 나노섬유는 미세굵기로 형성되어 미세한 폭을 제공함과 동시에 그 단면이 원형으로 형성되기 때문에 투과되는 빛을 집광시키도록 함으로써 휘도를 향상시키고, 방사형태로 형성시킨 프리즘패턴이므로 압출형태로 형성된 미세꼭지점 패턴보다 무너짐 현상을 최소화할 수 있다. 아울러 상기 나노섬유층(30)은 도 1c를 참조 한 바와같이 섬유배열이 x, y축으로 직교되게 복수의 층(30,30‘)으로 형성하여 각 방향에 대해 전반사나 시야각 외로 소실되는 빛의 집광이 이루어지도록 할 수 있다. 상기 나노섬유층은 1차적으로 x축으로 배열을 갖도록 나노섬유를 부착하여 층을 형성한 후 이에 직교되는 y축으로 배열을 갖도록 나노섬유를 부착시켜 이중층이 형성되도록 할 수도 있다.In addition, the nanofiber 31 is attached to the upper portion of the substrate to form a pattern. The nanofibers are formed in a fine thickness to provide a fine width and at the same time the cross-section is formed in a circular shape to improve the brightness by condensing the transmitted light, and because it is a prism pattern formed in a radial shape, a micro vertex formed in an extruded shape Minimize the collapse than the pattern. In addition, the nanofiber layer 30 is formed as a plurality of layers (30, 30 ') in which the fiber arrangement is orthogonal to the x, y axis, as shown in Figure 1c to collect the light lost in the total reflection or outside the viewing angle in each direction This can be done. The nanofibrous layer may be formed by attaching nanofibers to have an array primarily on the x-axis to form a layer, and then attaching the nanofibers to have an array on the y-axis orthogonal thereto so that a double layer is formed.

이와같이 도 2a와 도 2b를 참조한 바와같이 상부면에 나노섬유층(30)이 형성된 기판(20)의 하부면에는 나노크기의 비드(41)를 부착하여 확산시트층(40)을 형성하는 확산시트층형성과정(P3)이 더 이루어져 광원으로부터 전달받은 빛이 기판에 확산되면서 입사되도록 할 수 있다. 상기 비드(41)는 원형의 단면으로 인해 다양한 각도로 빛을 투과시킴으로써 기판은 균일한 조도의 빛이 입사되도록하여 최종적으로 배출되는 빛의 휘도를 일정하게 할 수 있는 것이다.As described above with reference to FIGS. 2A and 2B, a diffusion sheet layer is formed on the lower surface of the substrate 20 on which the nanofiber layer 30 is formed to attach the nano-sized beads 41 to form the diffusion sheet layer 40. The forming process P3 may be further performed to allow light received from the light source to be incident on the substrate. Since the beads 41 transmit light at various angles due to the circular cross section, the substrate allows light of uniform illuminance to be incident so that the luminance of the finally emitted light can be constant.

상기 나노섬유층(30)과 확산시트층(40)을 형성하는 나노섬유(31)와 비드(41)의 재질은 PMMA(polymethyl methacrylate ), PET(polyethylene Terephthalate), PC(polycarbonate) 중 어느 하나를 이루어진다.The nanofibers 31 and the beads 41 forming the nanofiber layer 30 and the diffusion sheet layer 40 may be made of one of PMMA (polymethyl methacrylate), PET (polyethylene terephthalate), and PC (polycarbonate). .

한편, 도 3 내지 도 5b를 참조한 바와같이 상기 나노섬유부착과정(P2)에서 나노섬유(31)는 균일한 배열로 부착이 이루어지도록 하기 위해 전처리과정(P4)이 더 이루어질수 있다.Meanwhile, as described with reference to FIGS. 3 to 5B, the nanofibers 31 may be further subjected to a pretreatment process P4 in order to attach the nanofibers 31 in a uniform arrangement.

상기 전처리과정(P4)은 나노섬유를 방사하는 방사단계(S1)와, 상기 방사되는 나노섬유를 롤러에 권취하여 원심력을 부가함으로써 직선배열이 이루어지도록 하는 원심배열단계(S2)로 이루어진다. 이 때 상기 롤러(51)는 나노섬유 분사구(52)와 근 접 설치되어 배출된 나노섬유가 즉시 롤러에 권취되도록 하여 원심력에 의해 직선배열이 이루어지도록 한다. The pretreatment process (P4) consists of a spinning step (S1) for spinning the nanofibers, and a centrifugal arrangement step (S2) to make a linear arrangement by winding the spinning nanofibers on a roller to add centrifugal force. At this time, the roller 51 is installed in close proximity to the nanofiber injection port 52 so that the discharged nanofibers are immediately wound on the roller so that the linear arrangement is made by centrifugal force.

또한, 상기 전처리과정에는 롤러전기장배열단계(S3)가 더 이루어지도록 하여 나노섬유 배열이 더욱 잘 이루어지도록 할 수 있다. 상기 롤러전기장배열단계는 롤러(51)의 외면에 축방향으로 다수의 전극(510)을 설치하고, 상기 전극에 전압을 인가하여 전극 사이에 전기장이 형성되도록 함으로써 나노섬유가 전기장을 따라 균일하게 배열되도록 할 수 있는 것이다. In addition, in the pretreatment process, the roller electric field arraying step (S3) is further made, so that the nanofiber array can be made better. In the roller field arrangement step, a plurality of electrodes 510 are installed on the outer surface of the roller 51 in the axial direction, and the nanofibers are uniformly arranged along the electric field by applying a voltage to the electrodes to form an electric field between the electrodes. I can do it.

따라서, 상기 분사구(52)에서 배출된 나노섬유는 롤러(51)의 원심력과 전극(510)의 전압인가로 인한 전기장에 의해 균일한 직선배열이 이루어져 광학필름의 나노섬유층이 균일한 간격으로 형성되게 할 수 있다.Therefore, the nanofibers discharged from the injection hole 52 are uniformly arranged by the electric field due to the centrifugal force of the roller 51 and the voltage applied to the electrode 510 so that the nanofiber layers of the optical film are formed at uniform intervals. can do.

아울러 상기 나노섬유는 상술된 바와같은 원형단면이외에 방사단계에서의 전기장 조절을 통해 나노섬유나 비드의 형상을 다양하게 조정할 수 있다. 즉, 본 발명자에 의해 출원된바있는 나노방사제조법을 이용하면 패턴형성기기의 추가 제작없이 간단한 프로세서에 의해 다양한 단면을 갖는 나노섬유를 대량생산할 수 있으며, 상기 제조된 다양한 단면의 나노섬유 및 비드를 본 발명의 광학필름에 적용할 수 있다. 예컨데, 도 6a와 도 6b을 참조한 바와같이 나노섬유(31) 및 비드(41)를 타원형 또는 반원형으로 형성하여 집광을 증대시키도록 하거나, 도 6c를 참조한 바와같이 일측이 라운딩되게 뭉개진 삼각형형태로 형성된 나노섬유(31) 및 비드(41)를 사용하여 내구성을 향상시키도록 할 수 있다.In addition, the nanofibers can be adjusted in various shapes of the nanofibers or beads through the control of the electric field in the spinning step in addition to the circular cross section as described above. That is, using the nano-spinning manufacturing method filed by the present inventors can mass-produce nanofibers having various cross sections by a simple processor without additional fabrication of a pattern forming apparatus, and the nanofibers and beads of the various cross sections prepared above It can be applied to the optical film of the present invention. For example, as shown in FIGS. 6A and 6B, the nanofibers 31 and the beads 41 may be formed in an elliptical or semicircular shape to increase condensing, or as shown in FIG. 6C, one side may be rounded and crushed in a triangular form. Nanofibers 31 and beads 41 may be used to improve durability.

한편, 상기 서술한 예는, 본 발명을 설명하고자하는 예일 뿐이다. 따라서 본 발명이 속하는 기술분야의 통상적인 전문가가 본 상세한 설명을 참조하여 부분변경 사용한 것도 본 발명의 범위에 속하는 것은 당연한 것이다.In addition, the above-mentioned example is only an example to demonstrate this invention. Therefore, it is obvious that the ordinary skilled in the art to which the present invention pertains uses the partial change with reference to the detailed description.

도 1a는 본 발명에 따른 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름의 제조방법을 도시한 흐름도.Figure 1a is a flow chart illustrating a method of manufacturing a multifunctional optical film formed with a nanofiber layer using the electrospinning according to the present invention.

도 1b는 본 발명에 따른 나노섬유층이 형성된 다기능 광학필름의 단면도.Figure 1b is a cross-sectional view of the multifunctional optical film formed with a nanofiber layer according to the present invention.

도 1c는 본 발명에 따른 광학필름의 다른 실시예를 도시한 단면도.Figure 1c is a cross-sectional view showing another embodiment of an optical film according to the present invention.

도 2a는 본 발명의 확산시트층이 형성된 광학필름의 제조방법을 도시한 흐름도.Figure 2a is a flow chart showing a manufacturing method of an optical film having a diffusion sheet layer of the present invention.

도 2b는 본 발명에 따른 확산시트층이 형성된 광학필름의 단면도.2b is a cross-sectional view of an optical film having a diffusion sheet layer according to the present invention.

도 3은 본 발명에 따른 전처리과정이 이루어진 광학필름 제조방법을 도시한 흐름도.Figure 3 is a flow chart illustrating a method for manufacturing an optical film made a pretreatment process according to the present invention.

도 4는 본 발명에 따른 전처리과정을 도시한 흐름도.4 is a flow chart showing a preprocessing process according to the present invention.

도 5a와 도 5b는 본 발명에 따른 나노섬유를 배열하는 롤러를 개략 도시한 평면도 및 사시도.5A and 5B are a plan view and a perspective view schematically showing a roller for arranging nanofibers according to the present invention.

도 6a 내지 도 6c는 본 발명의 다른 실시예에 따른 나노섬유 및 비드를 부착한 광학필름의 단면도.6A to 6C are cross-sectional views of an optical film with nanofibers and beads according to another embodiment of the present invention.

도 7은 종래 광학필름의 주요부 단면도.7 is a cross-sectional view of an essential part of a conventional optical film.

<도면의 주요 부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10 : 광학필름 20 : 기판10: optical film 20: substrate

30,30' : 나노섬유층 31 : 나노섬유30,30 ': nanofiber layer 31: nanofiber

40 : 확산시트층 41 : 비드40: diffusion sheet layer 41: bead

51 : 롤러 52 : 분사구51: roller 52: injection hole

510 : 전극510: electrode

P1 : 기판준비과정 P2 : 나노섬유부착과정P1: Substrate Preparation Process P2: Nano Fiber Attachment Process

P3 : 확산시트층형성과정 P4 : 전처리과정P3: Diffusion Sheet Layer Forming Process P4: Pretreatment Process

S1 : 방사단계 S2 : 원심배열단계S1: spinning step S2: centrifugal arrangement step

S3 : 롤러전기장배열단계S3: Roller electric field arrangement step

Claims (10)

기판에 패턴을 형성하여 휘도를 향상시키는 광학필름(10)에 있어서,In the optical film 10 to form a pattern on the substrate to improve the brightness, 베이스 기판(20)과;A base substrate 20; 상기 베이스기판의 상부면에 부착되어 빛을 집광시키는 나노섬유층(30);을 포함하여 구성됨을 특징으로 하는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름.Multi-function optical film formed with a nanofiber layer using electrospinning, characterized in that it comprises ;; nanofiber layer 30 is attached to the upper surface of the base substrate to condense light. 제1항에 있어서,The method of claim 1, 상기 나노섬유층(30)은 섬유배열이 서로 직교되도록 복수개로 형성한 것을 특징으로 하는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름.The nanofiber layer 30 is a multi-functional optical film formed with a nanofiber layer using electrospinning, characterized in that formed in plural so that the fiber arrangement is perpendicular to each other. 제1항에 있어서,The method of claim 1, 상기 기판(20) 하부면에는 빛을 확산시키기 위해 다수의 비드(41)가 부착된 확산시트층(40)이 더 형성됨을 특징으로 하는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름.Multifunctional optical film having a nanofiber layer using electrospinning, characterized in that the diffusion sheet layer 40 attached to a plurality of beads 41 is further formed on the lower surface of the substrate 20. 제3항에 있어서,The method of claim 3, 상기 기판(20)은 PET(polyethylene Terephthalate)재질로 형성하고, 나노섬유층(30)과 확산시트층(40)은 PMMA(polymethyl methacrylate ), PET, PC(polycarbonate) 재질로 형성한 것을 특징으로 하는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름.The substrate 20 is formed of polyethylene terephthalate (PET) material, and the nanofiber layer 30 and the diffusion sheet layer 40 are formed of PMMA (polymethyl methacrylate), PET, and PC (polycarbonate). Multifunctional optical film formed with a nanofiber layer using radiation. 기판에 집광부를 형성하여 광학필름을 제조하는 방법에 있어서,In the method for manufacturing an optical film by forming a light collecting portion on a substrate, 기판 준비과정(P1)과;A substrate preparation process P1; 상기 기판 상부면에 나노섬유를 부착하여 집광이 이루어지도록 하는 나노섬유부착과정(P2);을 포함하여 이루어짐을 특징으로 하는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름의 제조방법.Nano-fiber adhesion process (P2) to attach the nanofibers to the upper surface of the substrate so that the light is condensed; The method of manufacturing a multi-functional optical film with a nanofiber layer formed using electrospinning characterized in that it comprises a. 제5항에 있어서,The method of claim 5, 상기 나노섬유가 부착된 기판의 하부면에 빛의 확산을 위해 다수의 비드를 부착시키는 확산시트층형성과정(P3)이 더 이루어지는 것을 특징으로 하는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름의 제조방법.Fabrication of a multi-functional optical film with a nanofiber layer formed using electrospinning, characterized in that the diffusion sheet layer forming process (P3) for attaching a plurality of beads for the diffusion of light to the lower surface of the nanofiber substrate is further formed Way. 제5항에 있어서,The method of claim 5, 상기 나노섬유부착과정에는 나노섬유를 x축으로 배열된 층을 부착한 후 y축으로 배열된 층을 부착하여 서로 직교되는 이중층으로 형성되도록 한 것을 특징으로 하는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름의 제조방법.In the nanofiber attachment process, the nanofibers are formed by attaching layers arranged on the x-axis, and then attaching the layers arranged on the y-axis to form bilayers orthogonal to each other. Method for producing a film. 제5항에 있어서,The method of claim 5, 상기 나노섬유부착과정에서 기판에 부착되는 나노섬유는 섬유배열을 일정하게 하기 위해 전처리과정(P4)이 더 이루어짐을 특징으로 하는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름의 제조방법.The nanofibers attached to the substrate in the nanofiber attachment process is a method for producing a multi-functional optical film formed with a nanofiber layer using electrospinning, characterized in that the pre-treatment process (P4) is further made to make the fiber arrangement constant. 제8항에 있어서,The method of claim 8, 상기 전처리과정(P4)에는, In the pretreatment process (P4), 나노섬유를 방사하는 방사단계(S1)와;Spinning step (S1) for spinning the nanofibers; 방사되는 나노섬유를 롤러에 권취되도록 하여 원심력에 의해 직선배열이 이루어지는 원심배열단계(S2)를 포함하여 이루어짐을 특징으로 하는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름의 제조방법.Method for producing a multi-functional optical film formed with a nanofiber layer using an electrospinning, characterized in that it comprises a centrifugal arrangement step (S2) that is made to be linearly arranged by centrifugal force by winding the nanofibers to be radiated. 제9항에 있어서,The method of claim 9, 상기 전처리단계(P4)에는 롤러(51)에 전극(510)을 형성하고, 상기 전극에 전원을 인가하여 전기장을 발생시킴으로써 전기장에 의해 나노섬유가 직선배열되도록 하는 롤러전기장배열단계(S3)가 더 이루어짐을 특징으로 하는 전기방사를 이용한 나노섬유층이 형성된 다기능 광학필름의 제조방법.In the pretreatment step P4, a roller electric field arraying step S3 for forming an electrode 510 on the roller 51 and applying electric power to the electrode to generate an electric field so that the nanofibers are linearly arranged by the electric field is further performed. Method for producing a multi-functional optical film formed with a nanofiber layer using electrospinning characterized in that.
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