KR200452055Y1 - Optical film - Google Patents

Optical film Download PDF

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KR200452055Y1
KR200452055Y1 KR2020070015671U KR20070015671U KR200452055Y1 KR 200452055 Y1 KR200452055 Y1 KR 200452055Y1 KR 2020070015671 U KR2020070015671 U KR 2020070015671U KR 20070015671 U KR20070015671 U KR 20070015671U KR 200452055 Y1 KR200452055 Y1 KR 200452055Y1
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South Korea
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optical film
micro
transparent substrate
layer
light
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KR2020070015671U
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Korean (ko)
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KR20080000342U (en
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창 쉬-이
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이터널 케미칼 컴퍼니 리미티드
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Priority to KR2020070015671U priority Critical patent/KR200452055Y1/en
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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
    • G02B5/0221—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 the surface having an irregular structure
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/003—Lens or lenticular sheet or layer
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Abstract

광학필름은 상면과 하면을 갖는 투명기판; 상기 투명기판의 상면에 배치되고 다수의 반구체 돌기를 갖는 마이크로-반구체층; 및 상기 투명기판의 하면에 배치된 비평탄 확산층을 포함한다. 상기 마이크로-반구체층은 광을 집광시킨다. 상기 비평탄 확산층은 광을 확산한다.The optical film includes a transparent substrate having an upper surface and a lower surface; A micro-semisphere layer disposed on an upper surface of the transparent substrate and having a plurality of hemispherical protrusions; And a non-flat diffusion layer disposed on the bottom surface of the transparent substrate. The micro-hemisphere layer condenses light. The non-planar diffusion layer diffuses light.

광학필름, 편광, 확산, 집광 Optical film, polarization, diffusion, condensing

Description

광학필름{OPTICAL FILM}Optical film {OPTICAL FILM}

본 고안은 광학 필름에 관한 것으로, 보다 구체적으로는 액정 디스플레이를 위한 광학 필름에 관한 것이다.The present invention relates to an optical film, and more particularly to an optical film for a liquid crystal display.

액정 디스플레이의 시야각과 칼라 특성을 향상시키기 위한 다양한 시도들이 있어왔다. 예를 들어, 램프 수를 증가하여 액정 디스플레이 패널의 휘도를 향상시킬 수 있으나 이것은 패널 내부에서 램프들에 의해 발생된 과도한 열을 누적시키는 경향이 있어서 결과적으로 패널을 구성하는 소자들의 성능 저하와 짧은 수명을 야기한다. 게다가 램프 수의 증가에 의해 야기되는 대량의 전력 소비는 배터리 전력의 휴대용 제품들에게는 적합하지 않다. 액정 디스플레이 패널의 휘도를 효과적으로 증가하기 위해 어떠한 소자의 변경이나 추가 에너지 소비 없이 백라이트 모듈에서 다양한 광학 필름들을 채용하는 것만으로 최대의 광원을 만들 수 있는 가장 경제적이고 효과적인 접근이 고려되어 왔다.Various attempts have been made to improve the viewing angle and color characteristics of liquid crystal displays. For example, it is possible to improve the brightness of a liquid crystal display panel by increasing the number of lamps, but this tends to accumulate excessive heat generated by the lamps inside the panel, resulting in reduced performance and short lifespan of the elements constituting the panel. Cause. In addition, the large power consumption caused by the increase in the number of lamps is not suitable for battery powered portable products. In order to effectively increase the brightness of the liquid crystal display panel, the most economical and effective approach has been considered to create the maximum light source simply by employing various optical films in the backlight module without any device change or additional energy consumption.

일반적으로 알려진 광학 필름의 하나는 "휘도증강필름(Brightness Enhancement Film ,BEF)" 또는 "프리즘 필름(Prism Film)"이라는 것으로, 이것은 폴리에스테르 광학 필름 상에 고 에너지 자외선 광으로 특별한 아크릴 합성수지를 경화시켜 단지 50~200 마이크론 두께를 갖는 폴리에스테르 광학 필름 위에 형성된 좋은 분광 구조를 갖는다. 휘도증강필름(BEF)의 주 기능은 축상의 약 ㅁ35도(degrees)의 방향으로 초점을 맞추어 굴절과 전체 내부 반사에 의해 광 가이드로부터 모든 방향으로 향하여 발산하는 분산 광을 수집하여 액정 디스플레이의 휘도를 증강하는 것이다.One commonly known optical film is "Brightness Enhancement Film (BEF)" or "Prism Film", which hardens special acrylic synthetic resin with high energy ultraviolet light on polyester optical film. It has a good spectral structure formed on a polyester optical film with a thickness of only 50-200 microns. The main function of the brightness enhancement film (BEF) is to focus in the direction of about 3535 degrees on the axis and to collect the scattered light emitted from the light guide in all directions by refraction and total internal reflection, so that the brightness of the liquid crystal display To enhance.

백라이트 모듈의 휘도 증강 필름에 적용하도록 디자인된 많은 종래 기술들이 게시되어 있다.Many prior art designs have been published which are designed for application to the brightness enhancing film of a backlight module.

도 1을 참조하여, 예를 들면, 통상적인 휘도 증강 필름(10)은 상면과 하면을 갖는 기판(11)을 포함한다. 집광 구조(12)는 상기 기판(11)의 상면과 같은 단지 하나의 표면이다. 상기 하면은 매끄럽고 광원으로부터의 광을 균등하게 확산하고 효과적으로 집광할 수 없다. 상기 문제점들에 대처하기 위해, 업계의 공통적인 접근 방식은 휘도 증강 필름의 아래에 확산 필름을 제공하는 것이다. 그러나 이러한 접근 방식은 비용 증가와 백라이트 모듈을 복잡하게 한다.Referring to FIG. 1, for example, a conventional brightness enhancing film 10 includes a substrate 11 having an upper surface and a lower surface. The light collecting structure 12 is only one surface, such as the top surface of the substrate 11. The lower surface is smooth and cannot diffuse the light from the light source evenly and efficiently collect it. To address these problems, a common approach in the industry is to provide a diffuser film underneath the brightness enhancement film. However, this approach increases costs and complicates the backlight module.

따라서 본 고안의 목적은 다양한 이득을 줄 수 있을 뿐만 아니라 전술한 문제점에 대처할 수 있는 광학 필름을 제공하는 것이다. 본 고안의 광학 필름은 마이크로-반구체층(micro-hemisphere layer)을 갖는 상면과 비평탄 표면(비평탄 확산층)인 하면을 포함한다. 광은 상기 비평탄 확산층에 의해 확산 및 균일하게 되고 상기 마이크로-반구체층에 의해 집광된다. 그럼으로 본 고안의 광학 필름에 의해 보다 좋은 광 균일성과 광 집광성이 얻어 질 수 있다.Therefore, an object of the present invention is to provide an optical film that can provide various benefits as well as address the above-mentioned problems. The optical film of the present invention includes a top surface having a micro-hemisphere layer and a bottom surface which is a non-flat surface (non-flat diffusion layer). Light is diffused and made uniform by the non-planar diffusion layer and is concentrated by the micro-semisphere layer. Therefore, better light uniformity and light concentrating property can be obtained by the optical film of the present invention.

본 고안의 다른 목적은 얇고 가볍고 소형화된 그리고 좋은 가격을 갖는 액정 디스플레이를 위한 광학 필름을 제공하는데 있다.Another object of the present invention is to provide an optical film for a liquid crystal display having a thin, light, miniaturized and good price.

상술한 목적과 효과를 달성하기 위하여, 본 고안에 따른 광학 필름은 상면과 하면을 갖는 투명기판, 상기 투명기판의 상면에 배치되고 다수의 마이크로 반구체 돌기가 구비된 마이크로-반구체층, 그리고 상기 투명기판의 하면에 배치된 비평탄 확산층을 포함한다. 상기 마이크로-반구체층은 광을 잡광시키는 반면 상기 비평탄 확산층은 광을 확산 시킨다.In order to achieve the above object and effect, the optical film according to the present invention is a transparent substrate having an upper surface and a lower surface, a micro-semisphere layer disposed on the upper surface of the transparent substrate and provided with a plurality of micro hemispherical protrusions, and the transparent And a non-planar diffusion layer disposed on the bottom surface of the substrate. The micro-spherical layer diffuses light while the non-planar diffusion layer diffuses light.

본 고안의 목적들과 이득 그리고 신규한 특징들은 첨부도면과 함께 아래에서 상세히 기술되는 실시예에 의해 보다 명백하여 진다.The objects, benefits and novel features of the present invention are made more apparent by the embodiments described below in conjunction with the accompanying drawings.

본 고안의 광학 필름은 광은 상기 비평탄 확산층에 의해 확산 및 균일하게 되고 상기 마이크로-반구체층에 의해 집광된다. 그럼으로 본 고안의 광학 필름에 의해 보다 좋은 광 균일성과 광 집광성이 얻어 질 수 있으며, 보다 얇고 가볍고 소형화된 그리고 좋은 가격을 갖는 액정 디스플레이를 위한 광학 필름을 제공할 수 있다. In the optical film of the present invention, light is diffused and uniformized by the non-flat diffusing layer and is collected by the micro-semi-sphere. Therefore, better optical uniformity and light condensation can be obtained by the optical film of the present invention, and it is possible to provide an optical film for a liquid crystal display having a thinner, lighter, smaller size and a good price.

도 2를 참조하여, 본 고안에 따른 광학 필름(100)이 도시되어 있다. 광학 필름(100)은 투명기판(101), 투명기판(101)의 상면에 형성된 마이크로-반구체 층(102), 및 상기 상면에 대향되어 투명기판(10)의 하면에 형성된 비평탄 확산층(103)을 포함한다.Referring to Figure 2, an optical film 100 according to the present invention is shown. The optical film 100 includes a transparent substrate 101, a micro-semiconductor layer 102 formed on the upper surface of the transparent substrate 101, and a non-flat diffusion layer 103 formed on the lower surface of the transparent substrate 10 opposite to the upper surface. ).

본 고안에 따른 광학 필름(100)에 사용된 투명기판(101)은 유리나 플라스틱과 같은 이 분야에 숙련된 기술자에 알려진 어떠한 기판으로도 구성될 수 있다. 상술한 플라즈마 기판은 특별한 제한은 없으며 제한적이지는 않지만 폴리에틸렌 수지(polyethylene terephthalate: PET)와 같은 폴리에스테르 수지(polyester resin); 폴리메타크릴산 메틸 수지(polymethyl methacrylate: PMMA)와 같은 폴리아크릴레이트 수지(polyacrylate resin); 폴리에틸렌(polyethylene: PE) 또는 폴리프로필렌(polypropylene: PP)과 같은 폴리올레핀 수지(polyolefin resin); 폴리이미드 수지(polyimide resin); 폴리카보네이트 수지(polycarbonate resin); 폴리우레탄수지(polyurethane resin); 트리아세틸 셀룰로오스(cellulose triacetate: TAC); 또는 이들의 혼합을 포함한다. 상기 기판의 두께는 기본적으로 광학 제품의 필요한 요구에 따르지만 바람직하게는 약 50 마이크론에서 약 300 마이크론 사이이다.The transparent substrate 101 used in the optical film 100 according to the present invention may be composed of any substrate known to those skilled in the art, such as glass or plastic. The plasma substrate described above is not particularly limited and may include, but is not limited to, polyester resins such as polyethylene terephthalate (PET); Polyacrylate resins such as polymethyl methacrylate (PMMA); Polyolefin resins such as polyethylene (PE) or polypropylene (PP); Polyimide resins; Polycarbonate resins; Polyurethane resins; Triacetyl cellulose (TAC); Or mixtures thereof. The thickness of the substrate basically depends on the required requirements of the optical product but is preferably between about 50 microns and about 300 microns.

상기 투명기판(10)상의 마이크로-반구체층(102)은 수지로부터 형성된다. 상술한 수지는 특별한 제한은 없으며 제한적이지는 않지만 열경화성 수지 또는 자외선 경화 수지를 포함하며 바람직하게는 자외선 경화 수지로 구성된다. 상술한 자외선 경화 수지는 예를 들어 아크릴 수지이며 제한적인 것은 아니다. 채용 가능한 적합한 아크릴 수지는 예를 들어 제한적인 것은 아니지만 메타크릴레이트산 수지((meth)acrylate resin), 우레탄 아크릴 수지(urethane acrylate resin), 폴리에스테르 아크릴 수지(polyester acrylate resin), 에폭시 아크릴 수지(epoxy acrylate resin), 또는 이들의 혼합이다. 상술한 아크릴 수지는 하나 또는 그 이상의 기능적 그룹을 포함할 수 있다. 이 다중 기능 그룹들은 유리 변화 온도를 일으키도록 우선시 된다.The micro-semisphere layer 102 on the transparent substrate 10 is formed from a resin. The above-mentioned resins include, but are not limited to, thermosetting resins or ultraviolet curable resins, and are preferably composed of ultraviolet curable resins. The above-mentioned ultraviolet curable resin is an acrylic resin, for example, It is not restrictive. Suitable acrylic resins that may be employed are, for example, but not limited to, methacrylate resins, urethane acrylate resins, polyester acrylate resins, and epoxy acrylic resins. acrylate resin), or a mixture thereof. The acrylic resin described above may include one or more functional groups. These multiple functional groups are prioritized to produce glass change temperatures.

본 고안에 따른 광학 필름(100)은 광원으로부터의 광을 균일하게 확산하고 집광하며, 그럼으로 통상적인 휘도 증강 필름과 확산 필름의 특징을 모두 갖는다. 도 2 및 도 3을 참조하여, 광 집광 효과를 달성하기 위해, 상기 마이크로-반구체층(102)은 광-집광층과 같이 투명기판(101)의 상면에 형성된다. 도시된 바와 같이, 마이크로-반구체층(102)은 광 집광을 위해 다수의 마이크로 반구체 돌기(104)를 포함한다. 도 4를 참조하여, 마이크로 반구체 돌기(104)는 1 마이크론에서 100 마이크론 사이의 다양한 두께와 1.3에서 2.0 사이의 굴절 지수를 갖는 반구체들을 포함한다. 광-집광층으로서 마이크로-반구체층(102)에 형성된 상술한 수지는 무기충전제(inorganic filler), 평탄화제(leveling agent), 기포방지제(defoaming agent), 대전방지제(anti-static agent) 등과 같은 통상적인 첨가제가 선택적으로 포함된다.The optical film 100 according to the present invention uniformly diffuses and collects light from a light source, and thus has both the characteristics of a conventional brightness enhancing film and a diffusing film. 2 and 3, in order to achieve the light condensing effect, the micro-semi-sphere layer 102 is formed on the upper surface of the transparent substrate 101 like the light-condensing layer. As shown, the micro-semisphere layer 102 includes a plurality of micro hemispherical protrusions 104 for light condensing. Referring to FIG. 4, the microspheroidal protrusion 104 includes hemispheres having various thicknesses between 1 micron and 100 microns and refractive indices between 1.3 and 2.0. The above-mentioned resins formed in the micro-semisphere layer 102 as the light-condensing layer are conventional such as inorganic fillers, leveling agents, defoaming agents, anti-static agents, and the like. Phosphorus additives are optionally included.

본 고안의 마이크로-반구체층(102)은 이 분야의 숙련된 기술자에게 알려진 어떠한 방법을 사용하여 형성될 수 있다. 상기 방법은, 예를 들어, 다음 단계를 포함한다.The micro-hemisphere layer 102 of the present invention can be formed using any method known to those skilled in the art. The method includes, for example, the following steps.

(a) 콜로이드 코팅 합성물을 형성하도록 수지와 광개시제를 혼합하는 단계; (a) mixing the resin with the photoinitiator to form a colloidal coating composite;

(b) 콜로이드 코팅 합성물을 투명기판에 공급하여 투명기판에 코팅층을 형성하는 단계;(b) supplying a colloidal coating composite to the transparent substrate to form a coating layer on the transparent substrate;

(c) 엠보싱 롤러, 고온 이송 또는 고온 압출을 사용하여 코팅층을 마이크로-반구체 구조로 형성하는 단계; 및(c) forming the coating layer into a micro-semi-sphere structure using an embossing roller, hot feed or hot extrusion; And

(d) 에너지 광선, 열, 또는 둘 모두를 공급하여 코팅층을 경화하는 단계.(d) supplying energy rays, heat, or both to cure the coating layer.

되도록이면, 코팅층 경화 단계(d)는 에너지 광선 복사를 공급하여 중화를 야기하도록 한다. 상기 에너지 광선은 우선적으로 UV, IR, 가시광 또는 열선(방사), 및 UV와 같은 확실한 범위의 파장을 갖는 광원을 포함한다. 방사선의 세기는 1에서 500(mJ/cm2)이고, 바람직하게는 50 to 300(mJ/cm2)이다.Preferably, the coating layer curing step (d) supplies energy ray radiation to cause neutralization. The energy rays preferentially include light sources having a range of wavelengths such as UV, IR, visible or hot rays (radiation), and UV. The intensity of the radiation is 1 to 500 (mJ / cm 2 ), preferably 50 to 300 (mJ / cm 2 ).

도 3에 도시된 바와 같이, 본 고안에 따른 광학필름(100)의 하면의 비평탄 확산층(103)은 비평탄 표면이며, 그 것의 형성 과정은 이 분야의 기술자들에게는 알려져 있는 것으로, 예를 들어, 스크린 인쇄, 분사, 코팅, 또는 엠보싱 이지만 이에 한정되지는 않는다. 상기 비평탄 확산층(103)은 광을 균일하게 분산할 수 있다. 또한, 비평탄 확산층(103)은 동작 중에 입자들이 정전력에 의해 부착될 수 있는 것을 감소시킬 수 있다.As shown in FIG. 3, the non-flat diffused layer 103 of the lower surface of the optical film 100 according to the present invention is a non-flat surface, the formation process of which is known to those skilled in the art, for example , Screen printing, spraying, coating, or embossing, but not limited to these. The non-planar diffusion layer 103 may uniformly distribute light. In addition, the non-planar diffusion layer 103 can reduce the particles that can be attached by electrostatic force during operation.

본 고안의 광학필름(100)에 의하면, 광원으로부터 광학필름(100)을 통과하는 광은 비평탄 확산층(103)에 의해 균일하게 확산되고 그리고 마이크로-반구체층(102)에 의해 집광된다. 그럼으로 본 고안에 따른 광학필름은 광 확산 능력과 광 집광 능력을 갖는다. 따라서 본 고안의 광학필름은 광 확산 휘도 증강 필름으로서 액정 디스플레이의 백라이트 모듈로 사용될 수 있다. According to the optical film 100 of the present invention, the light passing through the optical film 100 from the light source is uniformly diffused by the non-planar diffusion layer 103 and is collected by the micro-semi-spherical layer 102. Therefore, the optical film according to the present invention has a light diffusing ability and a light collecting ability. Therefore, the optical film of the present invention can be used as a backlight module of a liquid crystal display as a light diffusion brightness enhancing film.

본 고안의 광학필름은 첨부된 청구범위의 범위 또는 그 균등물의 범위 내에서 다른 요인이나 디자인 요구에 따라 다양한 변형, 조합, 하위 조합 그리고 교환이 있을 수 있다는 것을 이 분야의 숙련된 기술자들은 잘 이해할 수 있다.Those skilled in the art can understand that the optical film of the present invention may have various modifications, combinations, sub-combinations and exchanges according to other factors or design requirements within the scope of the appended claims or their equivalents. have.

도 1은 종래의 휘도 증강 필름의 개략도이다.1 is a schematic view of a conventional brightness enhancing film.

도 2는 본 고안의 일 실시예의 사시도이다.2 is a perspective view of an embodiment of the present invention.

도 3은 본 고안의 일 실시예의 측면도이다.3 is a side view of an embodiment of the present invention.

도 4는 본 고안의 일 실시예의 부분 전면도이다.4 is a partial front view of an embodiment of the present invention.

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

10: 휘도증강필름 11: 기판10: brightness enhancement film 11: substrate

12: 집광 구조 100: 광학 필름12: condensing structure 100: optical film

101: 투명기판 102: 마이크로-반구체층101: transparent substrate 102: micro-hemisphere layer

103: 비평탄 확산층 104: 마이크로 반구체 돌기103: non-flat diffusion layer 104: micro hemispherical protrusion

Claims (4)

상면과 하면을 갖고, 50 마이크론에서 300 마이크론 사이의 두께를 갖는 투명기판;A transparent substrate having an upper surface and a lower surface and having a thickness of between 50 microns and 300 microns; 상기 투명기판의 상면에 배치되고 다수의 마이크로 반구체 돌기를 갖는 마이크로-반구체층; 및A micro-semisphere layer disposed on an upper surface of the transparent substrate and having a plurality of micro hemispherical protrusions; And 상기 투명기판의 하면에 배치된 비평탄 확산층을 포함하고, 상기 마이크로-반구체층은 자외선 경화수지이며 상기 자외선 경화수지는 다중 기능 그룹을 포함하는 아크릴 합성수지인 광학필름.And a non-planar diffusion layer disposed on a lower surface of the transparent substrate, wherein the micro-semisphere layer is an ultraviolet curable resin and the ultraviolet curable resin is an acrylic synthetic resin including multiple functional groups. 제1항에 있어서,The method of claim 1, 상기 투명기판은 유리 또는 플라스틱인 광학필름.The transparent substrate is an optical film of glass or plastic. 삭제delete 제1항에 있어서,The method of claim 1, 상기 마이크로-반구체층은 1.3에서 2.0 사이의 굴절지수를 갖는 광학필름.The micro-semisphere layer has an refractive index between 1.3 and 2.0.
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JP2004006256A (en) * 2002-03-26 2004-01-08 Sharp Corp Backlight and liquid crystal display device
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JP2004006256A (en) * 2002-03-26 2004-01-08 Sharp Corp Backlight and liquid crystal display device
KR20050093524A (en) * 2004-03-19 2005-09-23 주식회사 코오롱 Transparent optical film having surface-deformation-inhibiting layer where particles are placed

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