JP2007310389A - Multilayer optical film and its manufacturing method - Google Patents

Multilayer optical film and its manufacturing method Download PDF

Info

Publication number
JP2007310389A
JP2007310389A JP2007133352A JP2007133352A JP2007310389A JP 2007310389 A JP2007310389 A JP 2007310389A JP 2007133352 A JP2007133352 A JP 2007133352A JP 2007133352 A JP2007133352 A JP 2007133352A JP 2007310389 A JP2007310389 A JP 2007310389A
Authority
JP
Japan
Prior art keywords
layer
intermediate layer
structured surface
optical film
surface layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2007133352A
Other languages
Japanese (ja)
Inventor
Seihin Rin
清 彬 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CAYMAN ISLANDS SHOAKO KAGI KOF
CAYMAN ISLANDS SHOAKO KAGI KOFUN YUGENKOSHI
Original Assignee
CAYMAN ISLANDS SHOAKO KAGI KOF
CAYMAN ISLANDS SHOAKO KAGI KOFUN YUGENKOSHI
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CAYMAN ISLANDS SHOAKO KAGI KOF, CAYMAN ISLANDS SHOAKO KAGI KOFUN YUGENKOSHI filed Critical CAYMAN ISLANDS SHOAKO KAGI KOF
Publication of JP2007310389A publication Critical patent/JP2007310389A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • G02B5/0231—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 microprismatic or micropyramidal shape
    • 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
    • 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
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • 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
    • 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
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multilayer optical film to be manufactured more easily at a low cost and a method for manufacturing the multilayer optical film. <P>SOLUTION: The multilayer optical film 1 is provided with: a support layer 5; an intermediate layer 7 to be formed on the support layer; an upper structured surface layer 2 to be formed on the intermediate layer; a plurality of notches 6 formed in the upper part on the side of the upper structured surface layer of the intermediate layer; and a plurality of lower convex parts 4 formed to be projected downward on the side of the intermediate layer in the lower part of the upper structured surface layer. Each of notches of the intermediate layer is engaged with each of the lower convex parts of the upper structured surface layer, so that the intermediate layer formed on the support layer is combined with the upper structured surface layer. Each of the plurality of notches recessed on the intermediate layer is imprinted on the intermediate layer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、多層光学フィルムおよび多層光学フィルムの製造方法に関する。   The present invention relates to a multilayer optical film and a method for producing the multilayer optical film.

本件出願の発明者は、米国特許出願番号１１／３５８３４９において、構造化表面層と支持層とを接合してなる光学フィルムを開示している。この光学フィルムでは、構造化表面層は、上部に形成された複数の上方プリズム凸部または構造化凸部を含んでいる。構造化表面層はまた、底部に形成された複数の下方プリズム凸部または下方凸部を備えている。   The inventor of the present application discloses an optical film obtained by joining a structured surface layer and a support layer in US Patent Application No. 11/358349. In this optical film, the structured surface layer includes a plurality of upper prism protrusions or structured protrusions formed on the top. The structured surface layer also includes a plurality of lower prism protrusions or lower protrusions formed at the bottom.

支持層は、複数のノッチを備えている。ノッチは構造化表面層の下方凸部と噛み合わされる。これにより、構造化表面層と支持層とが結合され、フィルム強度を高め、光学フィルムの明るさをも増加させている。   The support layer includes a plurality of notches. The notch meshes with the downward protrusion of the structured surface layer. Thereby, the structured surface layer and the support layer are combined to increase the film strength and increase the brightness of the optical film.

支持層は、ポリエチレンテレフタレート（ＰＥＴ）を含む熱可塑性樹脂から作られている。複数のノッチを支持層に形成する際には、ノッチが形成された層を成形ないし形作るモールド成型のために、樹脂が軟化するガラス転移温度以上に熱可塑性層を加熱しなければならない。それから、冷やして、型から取り出さなければいけない。そのため、製造には非常に手間がかかり、多くの製造時間も費やされる。   The support layer is made of a thermoplastic resin containing polyethylene terephthalate (PET). When a plurality of notches are formed in the support layer, the thermoplastic layer must be heated to a temperature higher than the glass transition temperature at which the resin softens in order to mold the shaped layer with the notches. Then it must be cooled and removed from the mold. For this reason, the manufacturing is very laborious and a lot of manufacturing time is also consumed.

一方、製造面積が非常に大きい場合には、熱可塑性樹脂のフィルムや層に陥凹された均質なミクロ構造を得ることは難しい。さらに、層のミクロ構造を超小型化することも難しく、これによって、工業上あるいは商業上の利用が制限されている。   On the other hand, when the manufacturing area is very large, it is difficult to obtain a homogeneous microstructure recessed in a thermoplastic resin film or layer. In addition, it is difficult to miniaturize the layer microstructure, which limits industrial or commercial use.

本発明者は、従来技術の欠点に着目し、より簡易にそして安価なコストにより製造することが可能な多層光学フィルムを発明するに至った。   The present inventor has focused on the disadvantages of the prior art and has invented a multilayer optical film that can be manufactured more easily and at low cost.

そこで、本発明の目的は、より簡易にそして安価なコストにより製造することが可能な多層光学フィルム、およびその製造方法を提供することにある。   Therefore, an object of the present invention is to provide a multilayer optical film that can be manufactured more easily and at low cost, and a method for manufacturing the same.

上記目的を達成するための請求項１に記載の発明は、支持層と、
前記支持層の上に形成されインプリント可能な中間層と、
前記中間層の上に形成される上方構造化表面層と、
前記中間層における前記上方構造化表面層の側の上部部分に形成された複数のノッチと、
前記上方構造化表面層における前記中間層の側の下部部分に下方向に向けて突出して形成された複数の下方凸部と、を備え、
前記中間層のそれぞれの前記ノッチと前記上方構造化表面層のそれぞれの前記下方凸部とが噛み合わされて、前記支持層の上に形成された前記中間層と前記上方構造化表面層とが結合してなる多層光学フィルムである。 In order to achieve the above object, the invention according to claim 1 comprises a support layer,
An imprintable intermediate layer formed on the support layer;
An upper structured surface layer formed on the intermediate layer;
A plurality of notches formed in an upper portion of the intermediate layer on the side of the upper structured surface layer;
A plurality of downward protrusions formed to protrude downward in the lower portion of the upper structured surface layer on the side of the intermediate layer,
The intermediate layer formed on the support layer and the upper structured surface layer are coupled to each other by engaging the notches of the intermediate layer with the lower protrusions of the upper structured surface layer. A multilayer optical film.

また、上記目的を達成するための請求項５に記載の発明は、請求項１に記載の多層光学フィルムを製造する方法であって、
Ａ．中間層用の光硬化性樹脂または熱硬化性樹脂を支持層の上に均一にコーティングし、前記中間層に陥凹される複数のノッチを前記中間層にインプリントし、光の照射または加熱によって前記中間層用の樹脂を硬化させて、陥凹された複数のノッチを備える前記中間層を形成する工程と、
Ｂ．上方構造化表面層用の光硬化性樹脂または熱硬化性樹脂を前記中間層の複数の前記ノッチ内に充填するために前記上方構造化表面層用の樹脂を前記中間層の上に成型またはインプリントし、紫外光の照射または加熱によって前記上方構造化表面層用の樹脂を硬化させて、前記上方構造化表面層から下方向に向けてそれぞれ突出して前記中間層の複数の前記ノッチとそれぞれ噛み合う複数の下方凸部を形成し、前記支持層の上に形成された前記中間層と前記上方構造化表面層とを結合する工程と、を有する多層光学フィルムの製造方法である。 The invention according to claim 5 for achieving the above object is a method for producing the multilayer optical film according to claim 1,
A. A photo-curing resin or thermosetting resin for the intermediate layer is uniformly coated on the support layer, and a plurality of notches recessed in the intermediate layer are imprinted on the intermediate layer. Curing the intermediate layer resin to form the intermediate layer with a plurality of recessed notches;
B. Molding or injecting the resin for the upper structured surface layer on the intermediate layer in order to fill the plurality of notches of the intermediate layer with the photocurable resin or thermosetting resin for the upper structured surface layer. Printing, curing the resin for the upper structured surface layer by irradiation with ultraviolet light or heating, and projecting downward from the upper structured surface layer to engage with the plurality of notches in the intermediate layer, respectively. Forming a plurality of downward protrusions, and bonding the intermediate layer formed on the support layer and the upper structured surface layer.

本発明の多層光学フィルムは、支持層と、支持層の上に形成されインプリント可能な中間薄層と、中間層の上に形成された上方構造化表面層ないし上方プリズム層とを有している。中間薄層は、当該中間薄層に陥凹される複数のノッチがインプリントされている。中間薄層に陥凹された複数のノッチが、それぞれ、上方層から下方向に向けて突出する下方凸部と噛み合わされ、支持層の上に形成された中間層と上方層とがしっかりと結合されている。   The multilayer optical film of the present invention comprises a support layer, an intermediate thin layer formed on the support layer and imprintable, and an upper structured surface layer or upper prism layer formed on the intermediate layer. Yes. The intermediate thin layer is imprinted with a plurality of notches recessed into the intermediate thin layer. A plurality of notches recessed in the intermediate thin layer are engaged with lower projections projecting downward from the upper layer, and the intermediate layer and upper layer formed on the support layer are firmly connected Has been.

中間層は光硬化性樹脂または熱硬化性樹脂から形成されているため、成型過程において容易に、かつ、迅速に複数のノッチをインプリントすることができる。これによって、結合された多層光学フィルムをより迅速な方法で、かつ、低コストに作製することができる。   Since the intermediate layer is formed of a photocurable resin or a thermosetting resin, a plurality of notches can be imprinted easily and quickly in the molding process. This makes it possible to produce a bonded multilayer optical film in a faster manner and at a lower cost.

本発明によれば、より簡易にそして安価なコストにより製造することが可能な多層光学フィルム、およびその製造方法を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the multilayer optical film which can be manufactured more simply and at low cost, and its manufacturing method can be provided.

図１は、本発明の一実施形態に係る多層光学フィルムを示す断面図である。   FIG. 1 is a cross-sectional view showing a multilayer optical film according to an embodiment of the present invention.

図１に示すように、本発明の光学フィルムまたはプリズムシート１（多層光学フィルムに相当する）は、支持層５と、支持層５の上に形成されている中間層（または中間薄層）７と、中間層７の上に形成されている上方構造化表面層または上方プリズム層２（以下、単に「上方層２」とも言う）と、を含んでいる。   As shown in FIG. 1, the optical film or prism sheet 1 (corresponding to a multilayer optical film) of the present invention has a support layer 5 and an intermediate layer (or intermediate thin layer) 7 formed on the support layer 5. And an upper structured surface layer or upper prism layer 2 (hereinafter also simply referred to as “upper layer 2”) formed on the intermediate layer 7.

上方プリズム層２は、複数の上方プリズム凸部３を含み、上方プリズム凸部３の各々は、２つのプリズム面３ａ、３ｂより形成されている。２つのプリズム面３ａ、３ｂは、それらの面間における角度を定義するように上方に向かいテーパ形状をなしている。   The upper prism layer 2 includes a plurality of upper prism convex portions 3, and each of the upper prism convex portions 3 is formed by two prism surfaces 3a and 3b. The two prism surfaces 3a and 3b are tapered upward so as to define an angle between the surfaces.

支持層５は、ポリスチレンテレフタート（ＰＥＴ）、ポリカーボネイト（ＰＣ）やその他適切な透明な材料より形成され得る。   The support layer 5 can be formed from polystyrene terephthalate (PET), polycarbonate (PC) or other suitable transparent material.

中間層７および上方プリズム層２のそれぞれは、光硬化性樹脂（紫外線硬化樹脂を含む）や熱硬化性樹脂より形成され得る。   Each of the intermediate layer 7 and the upper prism layer 2 can be formed of a photocurable resin (including an ultraviolet curable resin) or a thermosetting resin.

図中符号Ｎ１、Ｎ２、Ｎ３は、それぞれ、上方層２、中間層７、支持層５の屈折率を示している。本発明では、屈折率の値は限定されるものではない。中間層７および支持層５は、同じ値の屈折率（Ｎ２＝Ｎ３）を有している。上方層２の屈折率Ｎ１は、中間層７の屈折率（Ｎ２）よりも大きな値（Ｎ１＞Ｎ２）、または支持層５の屈折率（Ｎ５）よりも大きな値（Ｎ１＞Ｎ３）とすることが望ましい。   Reference numerals N1, N2, and N3 in the figure indicate the refractive indexes of the upper layer 2, the intermediate layer 7, and the support layer 5, respectively. In the present invention, the value of the refractive index is not limited. The intermediate layer 7 and the support layer 5 have the same refractive index (N2 = N3). The refractive index N1 of the upper layer 2 is set to a value (N1> N2) larger than the refractive index (N2) of the intermediate layer 7, or a value (N1> N3) larger than the refractive index (N5) of the support layer 5. Is desirable.

本発明における光学フィルムは、下記の工程１、２を経て製造される。   The optical film in the present invention is produced through the following steps 1 and 2.

１．中間層用の光硬化性樹脂または熱硬化性樹脂を支持層５の上に均一にコーティングし、中間層に陥凹される複数のノッチを中間層にインプリントし、光（紫外線など）の照射またはヒータによる加熱によって中間層用の樹脂を固化または硬化させて、陥凹された複数のノッチ６を備える中間層７を形成する。   1. A photo-curing resin or thermosetting resin for the intermediate layer is uniformly coated on the support layer 5, and a plurality of notches that are recessed in the intermediate layer are imprinted on the intermediate layer, and light (such as ultraviolet rays) is irradiated. Alternatively, the intermediate layer resin including the plurality of recessed notches 6 is formed by solidifying or curing the intermediate layer resin by heating with a heater.

２．上方層２用の光硬化性樹脂または熱硬化性樹脂を中間層７の複数のノッチ６内に充填させ、流し込み、浸透させるために上方層２用の樹脂を中間層７の上に成型またはインプリントし、紫外光の照射またはヒータによる加熱によって上方層２用の樹脂を固化または硬化させて、上方層２から下方向に向けてそれぞれ突出して中間層７の複数のノッチ６とそれぞれ噛み合う複数の下方凸部４を形成し、支持層５の上に形成された中間層７と上方層２とをしっかりと結合する。   2. The resin for the upper layer 2 is molded or injected on the intermediate layer 7 so that the photocurable resin or the thermosetting resin for the upper layer 2 is filled into the plurality of notches 6 of the intermediate layer 7, poured, and penetrated. A plurality of prints are made by solidifying or curing the resin for the upper layer 2 by irradiation with ultraviolet light or heating by a heater, and projecting downward from the upper layer 2 to engage with the plurality of notches 6 of the intermediate layer 7 respectively. The lower convex part 4 is formed, and the intermediate layer 7 and the upper layer 2 formed on the support layer 5 are firmly bonded.

支持層５と中間層７との間の接着力を強化させるために、支持層５にプライマーコーティングを施すことができる。それから、中間層７にノッチ６を成型またはインプリントするために、支持層５の上に光硬化性樹脂または熱硬化性樹脂をコーティングし得る。   In order to strengthen the adhesive force between the support layer 5 and the intermediate layer 7, a primer coating can be applied to the support layer 5. Then, in order to mold or imprint the notch 6 in the intermediate layer 7, a photocurable resin or a thermosetting resin can be coated on the support layer 5.

本発明においては、下方凸部４の形状は限定されることはない。下方凸部４は、縦断面において、上方層２から下方向に向かうテーパ状の三角形形状に形成することができる。本発明においては、長方形、円形、球状形形状のような他の形状のものもまた用いることができる。   In the present invention, the shape of the downward projection 4 is not limited. The lower convex portion 4 can be formed in a tapered triangular shape that extends downward from the upper layer 2 in the longitudinal section. In the present invention, other shapes such as a rectangular shape, a circular shape, and a spherical shape can also be used.

図２は、本発明の他の実施形態に係る多層光学フィルムであって、複数の下方凸部が連続的に設けられた多層光学フィルムを示す断面図である。   FIG. 2 is a cross-sectional view showing a multilayer optical film according to another embodiment of the present invention, in which a plurality of downward convex portions are continuously provided.

図２に示すように、各下方凸部４は、２〜５μの範囲の高さＨを有している。各下方凸部４は、２つのプリズム面４ａ、４ｂを含む三角形形状に形成されている。２つのプリズム面４ａ、４ｂは、１０〜４０°の範囲の鋭角θを定義するように、下方向に向かうテーパ状に形成されている。   As shown in FIG. 2, each downward convex part 4 has the height H of the range of 2-5 micrometers. Each downward convex portion 4 is formed in a triangular shape including two prism surfaces 4a and 4b. The two prism surfaces 4a and 4b are formed in a tapered shape toward the lower direction so as to define an acute angle θ in the range of 10 to 40 °.

下方凸部４は、連続的に途切れることなく、上方層２の底部に形成し得る。もしくは、下方凸部４は、断続的に、上方層２の底部に形成し得る。より多くの下方凸部６が形成されることにより、光学フィルムの光学的性質を向上させることが可能となる。   The lower protrusion 4 can be formed on the bottom of the upper layer 2 without being continuously interrupted. Alternatively, the lower protrusion 4 can be intermittently formed at the bottom of the upper layer 2. By forming more downward convex portions 6, the optical properties of the optical film can be improved.

図３は、本発明のさらに他の実施形態に係る多層光学フィルムを示す斜視図である。   FIG. 3 is a perspective view showing a multilayer optical film according to still another embodiment of the present invention.

図３に示すように、各上方プリズム凸部３は、２つのプリズム面３ａ、３ｂを含んでいる。プリズム面３ａ、３ｂは、上方に向かうテーパ状に形成されており、互いに上部稜線（あるいは頂点線）Ｌ上において交差する。一方、各下方凸部４は、２つのプリズム面４ａ、４ｂを含んでいる。プリズム面４ａ、４ｂは、下方に向かうテーパ状に形成されており、互いに下部稜線Ｌ１上において交差する。上部稜線Ｌは、下部稜線Ｌ１に対して投影的に直交している。   As shown in FIG. 3, each upper prism protrusion 3 includes two prism surfaces 3a and 3b. The prism surfaces 3a and 3b are formed in an upward tapered shape and intersect with each other on the upper ridge line (or vertex line) L. On the other hand, each downward convex part 4 includes two prism surfaces 4a and 4b. The prism surfaces 4a and 4b are formed in a downward tapered shape and intersect each other on the lower ridge line L1. The upper ridge line L is projectively orthogonal to the lower ridge line L1.

もちろん、前述した上部稜線Ｌが下部稜線Ｌ１に対して平行をなすようにすることもできる。   Of course, the above-described upper ridge line L can be parallel to the lower ridge line L1.

上部稜線または下部稜線のその他の配置方向は、本発明に従って適宜修正することができる。   Other arrangement directions of the upper ridge line or the lower ridge line can be appropriately modified according to the present invention.

図４は、本発明のさらに他の実施形態に係る多層光学フィルムを示す斜視図である。   FIG. 4 is a perspective view showing a multilayer optical film according to still another embodiment of the present invention.

図４に示すように、下部稜線Ｌ２は、弧形または曲線に修正されている。全ての稜線Ｌ２は、上方層２の底部に同心状に形成されている。   As shown in FIG. 4, the lower ridgeline L2 is corrected to an arc shape or a curve. All the ridgelines L2 are formed concentrically at the bottom of the upper layer 2.

図５は、本発明のさらに他の実施形態に係る多層光学フィルムを示す断面図である。   FIG. 5 is a cross-sectional view showing a multilayer optical film according to still another embodiment of the present invention.

図５に示すように、いくつかの上方プリズム凸部３’は、それぞれ、その他の上方プリズム凸部３と比較して低くなっている。これにより、異なる高さを備える上方プリズム凸部３、３’が形成されている。高い凸部と低い凸部とを、支持層５の上の中間層７の上に選択的に形成することもできる。   As shown in FIG. 5, some of the upper prism protrusions 3 ′ are lower than the other upper prism protrusions 3. Thereby, the upper prism convex portions 3, 3 'having different heights are formed. High convex portions and low convex portions can be selectively formed on the intermediate layer 7 on the support layer 5.

図６は、本発明のさらに他の実施形態に係る多層光学フィルムを示す断面図である。   FIG. 6 is a cross-sectional view showing a multilayer optical film according to still another embodiment of the present invention.

図６に示すように、いくつかの上方プリズム凸部は、円形凸部３ｒまたは半円筒形凸部に修正されている。本発明においては、上方凸部３のその他の形状がさらに修正され得る。   As shown in FIG. 6, some of the upper prism protrusions are modified to be circular protrusions 3r or semi-cylindrical protrusions. In the present invention, other shapes of the upper convex portion 3 can be further modified.

本発明は、従来技術に対して、以下の様な優れた長所を有している。   The present invention has the following advantages over the prior art.

１．製造時間を短縮することができる。   1. Manufacturing time can be shortened.

２．光学フィルムの層に微細構造パターンをより均等に形成することができる。それによって、光の均等性と光学フィルムの明るさとが高まる。   2. The fine structure pattern can be more uniformly formed on the layer of the optical film. Thereby, the uniformity of light and the brightness of the optical film are increased.

３．光学フィルムの構造またはパターンを容易に超小型化することができる。   3. The structure or pattern of the optical film can be easily miniaturized.

４．光学フィルムの製品品質および能力ないし効率を向上させることができる。そして、それに応じて製造コストを削減することができる。   4). The product quality and ability or efficiency of the optical film can be improved. And the manufacturing cost can be reduced accordingly.

本発明における光硬化性または熱硬化性の樹脂より形成されている中間層７は、従来の出願あるいは技術における非常に厚みのある支持層と比較し、薄い層となっている。このことから、中間層７の光硬化性または熱硬化性樹脂の「薄層」は、パターンやノッチ６をその中間層７の上に素早くインプリントまたは成型することができる。それから、ＵＶ光の照射または加熱によって、中間層７を素早く固化ないし硬化することができる。これにより、従来技術では、成型作業または離型作業の最中に樹脂のガラス転移温度を昇温したり降温したりするためにより長い時間を必要としていたが、このような従来技術と比較して、本発明によれば、製造に要する一連の時間および費用を縮減することができる。   The intermediate layer 7 formed of the photo-curing or thermosetting resin in the present invention is a thin layer as compared with the very thick support layer in the conventional application or technology. From this, the “thin layer” of the photocurable or thermosetting resin of the intermediate layer 7 can quickly imprint or mold the pattern or notch 6 on the intermediate layer 7. Then, the intermediate layer 7 can be quickly solidified or cured by irradiation with UV light or heating. As a result, in the prior art, a longer time was required to raise or lower the glass transition temperature of the resin during the molding operation or the mold release operation. According to the present invention, a series of time and cost required for manufacturing can be reduced.

本発明は、本発明の精神および範囲から逸脱することなく、さらに修正することができる。   The present invention can be further modified without departing from the spirit and scope of the present invention.

本発明の一実施形態に係る多層光学フィルムを示す断面図である。It is sectional drawing which shows the multilayer optical film which concerns on one Embodiment of this invention. 本発明の他の実施形態に係る多層光学フィルムであって、複数の下方凸部が連続的に設けられた多層光学フィルムを示す断面図である。It is a multilayer optical film concerning other embodiments of the present invention, and is a sectional view showing a multilayer optical film in which a plurality of downward convex parts were provided continuously. 本発明のさらに他の実施形態に係る多層光学フィルムを示す斜視図である。It is a perspective view which shows the multilayer optical film which concerns on other embodiment of this invention. 本発明のさらに他の実施形態に係る多層光学フィルムを示す斜視図である。It is a perspective view which shows the multilayer optical film which concerns on other embodiment of this invention. 本発明のさらに他の実施形態に係る多層光学フィルムを示す断面図である。It is sectional drawing which shows the multilayer optical film which concerns on other embodiment of this invention. 本発明のさらに他の実施形態に係る多層光学フィルムを示す断面図である。It is sectional drawing which shows the multilayer optical film which concerns on other embodiment of this invention.

符号の説明Explanation of symbols

１ 多層光学フィルム、
２ 上方層（上方構造化表面層）、
３ 上方プリズム凸部、
４ 下方凸部、
５ 支持層、
６ ノッチ、
７ 中間層、中間薄層。 1 multilayer optical film,
2 Upper layer (upper structured surface layer),
3 Upper prism convex part,
4 downward projection,
5 support layer,
6 notches,
7 Intermediate layer, intermediate thin layer.

Claims (5)

支持層と、
前記支持層の上に形成されインプリント可能な中間層と、
前記中間層の上に形成される上方構造化表面層と、
前記中間層における前記上方構造化表面層の側の上部部分に形成された複数のノッチと、
前記上方構造化表面層における前記中間層の側の下部部分に下方向に向けて突出して形成された複数の下方凸部と、を備え、
前記中間層のそれぞれの前記ノッチと前記上方構造化表面層のそれぞれの前記下方凸部とが噛み合わされて、前記支持層の上に形成された前記中間層と前記上方構造化表面層とが結合してなる多層光学フィルム。 A support layer;
An imprintable intermediate layer formed on the support layer;
An upper structured surface layer formed on the intermediate layer;
A plurality of notches formed in an upper portion of the intermediate layer on the side of the upper structured surface layer;
A plurality of downward protrusions formed to protrude downward in the lower portion of the upper structured surface layer on the side of the intermediate layer,
The intermediate layer formed on the support layer and the upper structured surface layer are coupled to each other by engaging the notches of the intermediate layer with the lower protrusions of the upper structured surface layer. A multilayer optical film. 前記下方凸部のそれぞれが、縦断面において前記上方構造化表面層から下方向に向かうテーパ状の三角形形状に形成され、
前記ノッチのそれぞれが、前記中間層に陥凹され下方向に向かうテーパ状の三角形形状に形成されている請求項１に記載の多層光学フィルム。 Each of the lower protrusions is formed in a tapered triangular shape that extends downward from the upper structured surface layer in a longitudinal section,
The multilayer optical film according to claim 1, wherein each of the notches is formed in a tapered triangular shape that is recessed in the intermediate layer and extends downward. 前記上方構造化表面層が、前記上方構造化表面層から上方向に向けて突出する複数の上方プリズム凸部を有している請求項１に記載の多層光学フィルム。   The multilayer optical film according to claim 1, wherein the upper structured surface layer has a plurality of upper prism protrusions protruding upward from the upper structured surface layer. 前記支持層は、ポリエチレンテレフタレートおよびポリカーボネイトを含む透明な熱可塑性樹脂から形成されている請求項１に記載の多層光学フィルム。   The multilayer optical film according to claim 1, wherein the support layer is formed of a transparent thermoplastic resin including polyethylene terephthalate and polycarbonate. 請求項１に記載の多層光学フィルムを製造する方法であって、
Ａ．中間層用の光硬化性樹脂または熱硬化性樹脂を支持層の上に均一にコーティングし、前記中間層に陥凹される複数のノッチを前記中間層にインプリントし、光の照射または加熱によって前記中間層用の樹脂を硬化させて、陥凹された複数のノッチを備える前記中間層を形成する工程と、
Ｂ．上方構造化表面層用の光硬化性樹脂または熱硬化性樹脂を前記中間層の複数の前記ノッチ内に充填するために前記上方構造化表面層用の樹脂を前記中間層の上に成型またはインプリントし、紫外光の照射または加熱によって前記上方構造化表面層用の樹脂を硬化させて、前記上方構造化表面層から下方向に向けてそれぞれ突出して前記中間層の複数の前記ノッチとそれぞれ噛み合う複数の下方凸部を形成し、前記支持層の上に形成された前記中間層と前記上方構造化表面層とを結合する工程と、を有する多層光学フィルムの製造方法。 A method for producing the multilayer optical film according to claim 1, comprising:
A. A photo-curing resin or thermosetting resin for the intermediate layer is uniformly coated on the support layer, and a plurality of notches recessed in the intermediate layer are imprinted on the intermediate layer. Curing the intermediate layer resin to form the intermediate layer with a plurality of recessed notches;
B. Molding or injecting the resin for the upper structured surface layer on the intermediate layer in order to fill the plurality of notches of the intermediate layer with the photocurable resin or thermosetting resin for the upper structured surface layer. Printing, curing the resin for the upper structured surface layer by irradiation with ultraviolet light or heating, and projecting downward from the upper structured surface layer to engage with the plurality of notches in the intermediate layer, respectively. Forming a plurality of downward protrusions, and bonding the intermediate layer formed on the support layer and the upper structured surface layer.
JP2007133352A 2006-05-19 2007-05-18 Multilayer optical film and its manufacturing method Pending JP2007310389A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW095117758A TW200743827A (en) 2006-05-19 2006-05-19 Multi-layered optical films with enhanced functionality and method of making the same

Publications (1)

Publication Number Publication Date
JP2007310389A true JP2007310389A (en) 2007-11-29

Family

ID=38843233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007133352A Pending JP2007310389A (en) 2006-05-19 2007-05-18 Multilayer optical film and its manufacturing method

Country Status (3)

Country Link
JP (1) JP2007310389A (en)
KR (1) KR100900170B1 (en)
TW (1) TW200743827A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010002879A (en) * 2008-05-23 2010-01-07 Toray Ind Inc Optical sheet and back light unit using the same
WO2013154280A1 (en) * 2012-04-10 2013-10-17 주식회사 앤앤드에프 Method for manufacturing integral optical film, and integral optical film
JP2014160187A (en) * 2013-02-20 2014-09-04 Suntechopt Co Ltd Self-healing type high luminance prism sheet and surface light source unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101028088B1 (en) * 2008-05-23 2011-04-08 엘지전자 주식회사 Optical pipe and illuminating apparatus comprising the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06324205A (en) * 1993-03-23 1994-11-25 Dainippon Printing Co Ltd Lens sheet and surface light source formed by using this lens sheet
JPH08335044A (en) * 1995-06-07 1996-12-17 Dainippon Printing Co Ltd Lens sheet, surface light source, and display device
JPH11189629A (en) * 1997-12-26 1999-07-13 Mitsubishi Rayon Co Ltd Actinic-radiation-curing composition and optical sheet made therefrom
JP2000111714A (en) * 1998-09-30 2000-04-21 Konica Corp Soft focus filter and soft focus filter unit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7672051B2 (en) 2003-05-22 2010-03-02 Hitachi Chemical Co., Ltd. Optical film and surface light source using it
KR100657914B1 (en) 2004-11-24 2006-12-14 삼성전자주식회사 Prism sheet and back light unit employing the same
KR20060127610A (en) * 2005-06-08 2006-12-13 엘지전자 주식회사 A prism sheet employed in backlight unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06324205A (en) * 1993-03-23 1994-11-25 Dainippon Printing Co Ltd Lens sheet and surface light source formed by using this lens sheet
JPH08335044A (en) * 1995-06-07 1996-12-17 Dainippon Printing Co Ltd Lens sheet, surface light source, and display device
JPH11189629A (en) * 1997-12-26 1999-07-13 Mitsubishi Rayon Co Ltd Actinic-radiation-curing composition and optical sheet made therefrom
JP2000111714A (en) * 1998-09-30 2000-04-21 Konica Corp Soft focus filter and soft focus filter unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010002879A (en) * 2008-05-23 2010-01-07 Toray Ind Inc Optical sheet and back light unit using the same
WO2013154280A1 (en) * 2012-04-10 2013-10-17 주식회사 앤앤드에프 Method for manufacturing integral optical film, and integral optical film
JP2014160187A (en) * 2013-02-20 2014-09-04 Suntechopt Co Ltd Self-healing type high luminance prism sheet and surface light source unit

Also Published As

Publication number Publication date
KR20070112022A (en) 2007-11-22
KR100900170B1 (en) 2009-06-02
TW200743827A (en) 2007-12-01

Similar Documents

Publication Publication Date Title
JP6173354B2 (en) Light transmission type imprint mold, large area mold manufacturing method
JP2007086787A5 (en)
JP2007066699A (en) Light guide plate and manufacturing method of the light guide plate
JP2005062541A (en) Optical member and its manufacturing method, and surface emitting device and liquid crystal display device
JP2007310389A (en) Multilayer optical film and its manufacturing method
WO2016013655A1 (en) Method for manufacturing microscopic structural body
JP4277536B2 (en) Optical component, method for manufacturing the same, and image projection screen
JP2004198536A (en) Lens array sheet and its forming method
CN100462742C (en) Multi-layer type composite optical film with light-collecting and diffusion function and its production method
US9239411B2 (en) Optical flim, optical film assembly using the optical film, and manufacturing method of the optical film
JP2004322566A (en) Forming sheet and its manufacturing method
TWI417577B (en) Light transfer plate with light structure and light guide plate
TWI430879B (en) Light guide plate and manufacturing method thereof
US20070291371A1 (en) Synergetically enhanced multiple-layer optical film and process thereof
WO2014097662A1 (en) Light guide member and method for producing light guide member
JP5509566B2 (en) Optical component and liquid crystal display unit
JP5604054B2 (en) Method for manufacturing optical lens or optical waveguide or optical fiber core
TWI356926B (en) Light guide plate and manufacture method thereof
WO2016195064A1 (en) Structural body and method for manufacturing same
JP2007072459A (en) Optical element and method of manufacturing the same
KR101192881B1 (en) Optical component for diffusing light and method manufacturing the same
JP2017007187A (en) Method and apparatus for manufacturing mold formed article and optical element
KR101609196B1 (en) Light Guide Plate And Manufacturing Mathod Thereof
TWI439744B (en) Method of manufacturing light guide plate
TWI681224B (en) Light guide plate, lighting module and lighting device having the same, and method for manufacturing the light guide plate

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100201

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100209

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20100629