JP2000056105A - Directional light diffusing film, its manufacture and display device - Google Patents
Directional light diffusing film, its manufacture and display deviceInfo
- Publication number
- JP2000056105A JP2000056105A JP11121172A JP12117299A JP2000056105A JP 2000056105 A JP2000056105 A JP 2000056105A JP 11121172 A JP11121172 A JP 11121172A JP 12117299 A JP12117299 A JP 12117299A JP 2000056105 A JP2000056105 A JP 2000056105A
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- JP
- Japan
- Prior art keywords
- light
- film
- region
- light diffusion
- directional light
- 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.)
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Links
Landscapes
- Laminated Bodies (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、液晶表示装置、
プラズマ表示装置等の表示面に取り付けられ、正面輝度
の低下と視差を防止するための指向性光拡散フィルム、
その製造方法、及び、この指向性光拡散フィルムを用い
た表示装置に関する。The present invention relates to a liquid crystal display device,
A directional light diffusion film attached to the display surface of a plasma display device or the like to prevent a reduction in front luminance and parallax,
The present invention relates to a method for manufacturing the same and a display device using the directional light diffusion film.
【０００２】[0002]
【従来の技術】従来、上記のような表示装置、例えば反
射型液晶表示装置においては、表示面での正面方向の過
剰輝度の低下と視差を防止するために光拡散フィルムを
装着するようにしている。2. Description of the Related Art Conventionally, in a display device such as the above, for example, a reflection type liquid crystal display device, a light diffusing film is mounted on the display surface in order to prevent a reduction in excessive luminance in a front direction and a parallax. I have.
【０００３】この光拡散フィルムは、例えば、光拡散剤
を含み表面に凹凸を有する樹脂シート（フィルム）や樹
脂シート上に光拡散剤を含み表面に凹凸を有する光拡散
層を設けたものからなり、表示面からの出射光を拡散す
るようにしている。The light diffusing film is made of, for example, a resin sheet (film) containing a light diffusing agent and having irregularities on the surface, or a resin sheet provided with a light diffusing layer containing a light diffusing agent and having irregularities on the surface. The light emitted from the display surface is diffused.
【０００４】光拡散フィルムのうち樹脂シート上に光拡
散剤を含み表面に凹凸を有する光拡散層を設けたものに
は、表面凹凸が非常に小さく、主に光拡散層中の内部拡
散による拡散作用を利用した光拡散フィルムもある。Among the light diffusion films, those having a light diffusion layer containing a light diffusion agent on a resin sheet and having irregularities on the surface have very small surface irregularities, and are mainly diffused by internal diffusion in the light diffusion layer. There is also a light diffusion film utilizing the action.
【０００５】又、レンズフィルムも、光拡散フィルムと
同様な作用を有するため、光拡散フィルム用途に用いら
れる場合がある。[0005] Further, since a lens film has the same function as a light diffusion film, it may be used for a light diffusion film.
【０００６】更に又、前記レンズフィルム、光拡散フィ
ルムに類似したものとしてはルーバーフィルムがある。
このルーバーフィルムは、斜めの外光を吸収し、正面方
向のコントラストの改善に効果がある。A louver film is similar to the lens film and the light diffusion film.
This louver film absorbs oblique external light and is effective in improving the contrast in the front direction.
【０００７】[0007]
【発明が解決しようとする課題】上記のような光拡散フ
ィルムやレンズフィルムは、透過光の拡散により正面輝
度及び視差を改善することができるが、その光拡散効果
によって、外光の散乱反射も増加してコントラストが著
しく低下してしまったり、表示面における画素によって
形成される画像がボケ易いという問題点がある。The light diffusion film and the lens film as described above can improve the front luminance and the parallax by diffusing the transmitted light, but the light diffusion effect also reduces the scattering and reflection of external light. There is a problem that the contrast is remarkably reduced due to an increase, and an image formed by pixels on the display surface is easily blurred.
【０００８】又、内部拡散を主に用いた光拡散フィルム
では、通常の光拡散フィルムに比べ外光反射の程度を減
らすことができる。その反面、画像光の拡散が大きくな
り画像のぼけは通常の光拡散フィルムよりも大きくなっ
てしまうという問題点がある。A light diffusion film mainly using internal diffusion can reduce the degree of external light reflection as compared with a normal light diffusion film. On the other hand, there is a problem that the diffusion of the image light becomes large and the blur of the image becomes larger than that of a normal light diffusion film.
【０００９】一方上記のようなルーバーフィルムは、斜
めの外光を吸収し、正面方向のコントラストの改善に効
果があるものの、透過光の拡散効果はないので、正面輝
度や視差の改善を図ることができないという問題点があ
る。On the other hand, the louver film as described above absorbs oblique external light and is effective in improving the contrast in the front direction, but has no effect of diffusing transmitted light, so that front luminance and parallax are improved. There is a problem that can not be.
【００１０】この発明は、上記従来の問題点に鑑みてな
されたものであって、光拡散による正面過剰輝度の低下
と視差防止機能を損なうことなく、画像ボケを改善する
ことができるようにした指向性光拡散フィルム、その製
造方法、及び、その指向性光拡散フィルムを用いた表示
装置を提供することを目的とする。The present invention has been made in view of the above-mentioned conventional problems, and is capable of improving image blur without lowering excessive front luminance due to light diffusion and impairing a parallax preventing function. It is an object of the present invention to provide a directional light diffusion film, a method for manufacturing the same, and a display device using the directional light diffusion film.
【００１１】[0011]
【課題を解決するための手段】本発明は、光を厚さ方向
に透過する微細な透明領域と、厚さ方向に透過する光を
拡散する微細な光拡散領域とを、透明基材フィルムの表
面又は裏面の少なくとも一方に沿って、その１次元方向
又は２次元方向に交互に隙間なく配列して指向性光拡散
フィルムを構成することにより、上記目的を達成するも
のである。SUMMARY OF THE INVENTION The present invention provides a transparent base film having a fine transparent region transmitting light in the thickness direction and a fine light diffusion region diffusing light transmitting in the thickness direction. The above object is achieved by forming a directional light diffusing film by alternately arranging it in one-dimensional or two-dimensional directions without gaps along at least one of the front surface and the back surface.
【００１２】前記光拡散領域は、前記表面又は裏面と直
交する断面の形状が多角形となるようにしてもよい。[0012] The light diffusion region may have a polygonal cross section orthogonal to the front surface or the back surface.
【００１３】又、前記指向性光拡散フィルムにおいて、
前記光拡散領域と透明領域とを、交互に配列された平行
な直線帯状に構成してもよい。[0013] In the directional light diffusion film,
The light diffusion region and the transparent region may be configured in a parallel linear band shape alternately arranged.
【００１４】更に、前記光拡散領域は、透光性樹脂に光
拡散剤を含ませて構成してもよい。Further, the light diffusion region may be formed by including a light diffusing agent in a translucent resin.
【００１５】又、前記光拡散領域と前記透明領域との境
界を微細な凹凸が形成された凹凸面としてもよい。Further, a boundary between the light diffusion region and the transparent region may be an uneven surface on which fine unevenness is formed.
【００１６】又、前記指向性光拡散フィルムにおいて、
前記透明領域の表面を、凸レンズ形状及び凹レンズ形状
の一方としてもよい。In the above directional light diffusion film,
The surface of the transparent region may have one of a convex lens shape and a concave lens shape.
【００１７】更に又、前記指向性光拡散フィルムにおい
て、前記光拡散領域及び透明領域の外側を覆って反射防
止層を設けるようにしてもよい。Further, in the directional light diffusion film, an anti-reflection layer may be provided so as to cover the outside of the light diffusion region and the transparent region.
【００１８】又、前記指向性光拡散フィルムにおいて、
前記表面又は裏面の少なくとも一方側に、更に粘着層を
積層してもよい。Further, in the directional light diffusion film,
An adhesive layer may be further laminated on at least one of the front surface and the back surface.
【００１９】又、前記指向性光拡散フィルムにおいて、
前記偏光板は、液晶表示装置における表面側の偏光板と
してもよい。Further, in the directional light diffusion film,
The polarizing plate may be a polarizing plate on the front side in a liquid crystal display device.
【００２０】又、前記指向性光拡散フィルムにおいて、
前記表面又は裏面の少なくとも一方側に、更に、偏光板
を積層してもよい。In the above directional light diffusion film,
A polarizing plate may be further laminated on at least one of the front surface and the back surface.
【００２１】更に、前記指向性光拡散フィルムにおい
て、前記透明領域を透光性樹脂により構成してもよい。Further, in the directional light diffusing film, the transparent region may be made of a translucent resin.
【００２２】又、前記指向性光拡散フィルムにおいて、
前記透明領域を空間としてもよい。In the above directional light diffusion film,
The transparent area may be a space.
【００２３】表示装置に関する本発明は、画素により像
を表示する表示パネルと、この表示パネルの表示面に積
層された上記のような指向性光拡散フィルムとを備えて
表示装置を構成し、上記目的を達成するものである。According to the present invention, there is provided a display device comprising: a display panel for displaying an image by pixels; and a directional light diffusing film as described above laminated on a display surface of the display panel. The purpose is achieved.
【００２４】前記表示装置において、前記指向性光拡散
フィルムを、光透過性の粘着層を介して前記表示パネル
の表示面に張り付けてもよい。In the display device, the directional light diffusion film may be attached to a display surface of the display panel via a light-transmitting adhesive layer.
【００２５】前記表示装置において、前記表示パネルを
液晶表示パネルとし、前記指向性光拡散フィルムを、前
記光透過性の粘着層を介して前記液晶表示パネルの表面
側の偏光板に張り付けるようにしてもよい。In the display device, the display panel is a liquid crystal display panel, and the directional light diffusing film is attached to a polarizing plate on a front surface side of the liquid crystal display panel via the light transmitting adhesive layer. You may.
【００２６】又、指向性光拡散フィルムの製造方法の発
明は、透明基材フィルムの一方の面に、光を厚さ方向に
透過する微細な透明領域と、厚さ方向に透過する光を拡
散する微細な光拡散領域とを、前記面に沿う１次元又は
２次元方向に交互に隙間なく配列してなる指向性光拡散
フィルムの製造方法において、円周方向に複数の賦形用
凹部が間欠的に形成されたロール版の、前記賦形用凹部
に流動状態の樹脂を塗布しつつ、且つ、前記ロール版の
外周に透明基材フィルムを巻き掛けて、前記賦形用凹部
内の樹脂に接触させつつ、ロール版を回転させる工程
と、このロール版の回転中に、前記賦形用凹部内の樹脂
を透明基材フィルムに密着して硬化させて、光拡散領域
又は光透過領域の一方とする工程と、硬化した樹脂と共
に透明基材フィルムをロール版から剥離する工程と、か
ら構成し、上記目的を達成するものである。Further, the invention of the method for producing a directional light diffusing film is characterized in that a fine transparent region transmitting light in the thickness direction and a light transmitting light transmitting in the thickness direction are formed on one surface of the transparent substrate film. In a method for manufacturing a directional light diffusion film, in which a plurality of minute light diffusion regions are alternately arranged in a one-dimensional or two-dimensional direction along the surface without gaps, a plurality of shaping recesses are intermittently arranged in a circumferential direction. While applying a resin in a fluid state to the shaping recesses of the roll plate formed in an intended manner, and wrapping a transparent base film around the outer periphery of the roll plate, the resin in the shaping recesses is A step of rotating the roll plate while contacting, and during rotation of the roll plate, the resin in the shaping recess is brought into close contact with the transparent substrate film and cured, and one of the light diffusion region or the light transmission region And a transparent substrate film together with the cured resin Constructed from a step of peeling from the roll plate is intended to achieve the above object.
【００２７】前記指向性光拡散フィルムの製造方法にお
いて、前記剥離工程の後に、前記光拡散領域又は光透過
領域の一方を構成する硬化した樹脂の間の隙間に、光拡
散領域又は光透過領域の他方を構成する樹脂を充填、硬
化させる工程を有するようにしてもよい。In the method for manufacturing a directional light diffusing film, after the peeling step, a gap between the cured resin constituting one of the light diffusing region and the light transmitting region is provided in a gap between the light diffusing region and the light transmitting region. A step of filling and curing the other constituent resin may be provided.
【００２８】この発明においては、透明基材フィルムの
表面又は裏面が交互に配置された微細な透明領域及び光
拡散領域によって覆われているので、所定の光拡散効果
によって正面輝度の低下及び視差を防止できると共に、
隣接する光拡散領域間の透明領域から拡散されずに正面
方向に出射する光量を増やすことにより画像ボケが防止
される。In the present invention, since the front surface or the back surface of the transparent base film is covered with the fine transparent regions and light diffusion regions which are alternately arranged, a reduction in the front luminance and the parallax are prevented by a predetermined light diffusion effect. Can be prevented,
The image blur is prevented by increasing the amount of light emitted in the front direction without being diffused from the transparent region between the adjacent light diffusion regions.
【００２９】[0029]
【発明の実施の形態】以下本発明の実施の形態の例を図
面を参照して詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００３０】図１は、本発明の実施の形態の第１例に係
る指向性光拡散フィルム１０を示す。FIG. 1 shows a directional light diffusing film 10 according to a first embodiment of the present invention.
【００３１】この指向性光拡散フィルム１０は、透明基
材フィルム１２の表面に光を厚さ方向に透過する微細な
透明領域１４と、厚さ方向に透過しようとする光を拡散
する微細な光拡散領域１６とを交互に隙間なく配列して
形成されている。The directional light diffusing film 10 has a fine transparent region 14 on the surface of the transparent base film 12 that transmits light in the thickness direction and a fine light region that diffuses light to be transmitted in the thickness direction. The diffusion regions 16 are alternately arranged without gaps.
【００３２】前記透明基材フィルム１２は、透明な樹脂
フィルム、例えばポリエチレンテレフタレート（ＰＥ
Ｔ）フィルムからなり、又、光拡散領域１６は、アクリ
ルビーズ等の光拡散剤１５を含有した紫外線硬化性透明
樹脂からなり、前記透明領域１４は、空間又は電離放射
線硬化性樹脂等の透明樹脂から構成されている。The transparent substrate film 12 is made of a transparent resin film, for example, polyethylene terephthalate (PE).
T) a film, the light diffusion region 16 is made of an ultraviolet curable transparent resin containing a light diffusing agent 15 such as an acrylic bead, and the transparent region 14 is made of a transparent resin such as a space or ionizing radiation curable resin. It is composed of
【００３３】前記透明領域１４及び光拡散領域１６は、
図１の紙面に対して直交する方向に平行に延在する直線
帯状に構成されている。これらの寸法は、例えばＰＥＴ
からなる透明基材フィルム１２の厚さが１２５μｍのと
き、透明領域１４及び光拡散領域１６のフィルム厚さ方
向の高さは５０〜１５０μｍ、幅は５０〜１２０μｍ程
度とされている。The transparent area 14 and the light diffusion area 16
It is formed in a linear band shape extending in parallel to a direction perpendicular to the paper surface of FIG. These dimensions are, for example, PET
When the thickness of the transparent base film 12 is 125 μm, the height of the transparent region 14 and the light diffusion region 16 in the film thickness direction is about 50 to 150 μm, and the width is about 50 to 120 μm.
【００３４】上記のように構成された指向性光拡散フィ
ルム１０は、これを例えば反射型液晶表示装置の表示面
に取り付けた場合、出射光が光拡散領域１６によって拡
散され、正面方向の過剰な輝度の低下させ、且つ、視差
を防止できると共に、隣接する光拡散領域１６、１６間
の透明領域１４を通って、拡散されることなく正面方向
に表示光が出射するので、画像ボケが改善される。When the directional light diffusing film 10 configured as described above is attached to, for example, the display surface of a reflective liquid crystal display device, the emitted light is diffused by the light diffusing region 16 and excessive light in the front direction. Since the brightness can be reduced and the parallax can be prevented, the display light is emitted in the front direction without being diffused through the transparent region 14 between the adjacent light diffusion regions 16, 16, so that the image blur is improved. You.
【００３５】なお、前記光拡散領域１６はアクリルビー
ズ等の光拡散剤１５を含有することによって、光拡散効
果を得るようにしているが、本発明はこれに限定される
ものでなく、他の手段によって光拡散効果を得るように
してもよい。The light diffusion region 16 has a light diffusion effect by containing a light diffusion agent 15 such as an acrylic bead. However, the present invention is not limited to this. The light diffusion effect may be obtained by means.
【００３６】例えば、図２に示される本発明の実施の形
態の第２例に係る指向性光拡散フィルム２０のように、
透明領域１４と光拡散領域２２との境界面を、微細な凹
凸を有する凹凸面２４とすることによって、光拡散効果
が得られるようにしてもよい。なお、光拡散剤を併用し
てもよい。For example, like the directional light diffusion film 20 according to the second embodiment of the present invention shown in FIG.
The boundary surface between the transparent region 14 and the light diffusion region 22 may be formed as an uneven surface 24 having fine unevenness to obtain a light diffusion effect. Note that a light diffusing agent may be used in combination.
【００３７】前記実施の形態の第２例に係る指向性光拡
散フィルム２０においては、光拡散領域２２内を通過し
ようとする光のみならず、透明領域１４を通過しようと
する光の一部も前記凹凸面２４によって反射されること
により拡散光となり、又、光拡散領域２２内を直進する
光は、ここに光拡散剤が含まれていない場合、凹凸面２
４において反射されない限り、直進光のまま出射する。In the directional light diffusing film 20 according to the second example of the above embodiment, not only light trying to pass through the light diffusing area 22 but also a part of the light trying to pass through the transparent area 14. The light that is reflected by the uneven surface 24 becomes diffused light, and the light that travels straight through the light diffusion region 22 is the uneven surface 2 if no light diffusing agent is contained therein.
As long as the light is not reflected at 4, the light is emitted as straight light.
【００３８】又、上記実施の形態の第１例及び第２例に
係る指向性光拡散フィルム１０、２０における透明領域
１４及び光拡散領域１６、２２は、いずれも図の紙面に
直交する方向に直線状に延在する微細な直線群から構成
されているが、本発明はこれに限定されるものでなく、
透明領域と光拡散領域が透明基材フィルムの表面又は裏
面に沿って１次元方向又は２次元方向に交互に設けられ
たものであればよい。Further, the transparent regions 14 and the light diffusion regions 16 and 22 in the directional light diffusion films 10 and 20 according to the first and second examples of the above-described embodiment are all arranged in a direction orthogonal to the plane of the drawing. Although constituted by a group of fine straight lines extending linearly, the present invention is not limited to this,
What is necessary is that the transparent region and the light diffusion region are alternately provided in the one-dimensional direction or the two-dimensional direction along the front surface or the back surface of the transparent substrate film.
【００３９】従って、例えば図３に示される本発明の実
施の形態の第３例に係る指向性光拡散フィルム３０のよ
うに、透明基材フィルム１２の表面に透明領域３２と光
拡散領域３４を枡目状に交互に配置するようにしてもよ
い。Therefore, the transparent region 32 and the light diffusion region 34 are formed on the surface of the transparent base film 12 like the directional light diffusion film 30 according to the third embodiment of the present invention shown in FIG. It may be arranged alternately in a grid pattern.
【００４０】又、前記実施の形態の第１例〜第３例の指
向性光拡散フィルム１０、２０、３０は、表面と直交す
る断面における透明領域１４、３２及び光拡散領域１
６、２２、３４の断面形状が、いずれも四角形とされて
いるが、本発明はこれに限定されるものでなく、他の多
角形であってもよい。The directional light diffusing films 10, 20, and 30 of the first to third examples of the above embodiment have transparent regions 14, 32 and a light diffusing region 1 in a cross section orthogonal to the surface.
Although the sectional shapes of 6, 22, and 34 are all quadrangular, the present invention is not limited to this, and other polygons may be used.
【００４１】例えば、図４に示される本発明の実施の形
態の第４例に係る指向性光拡散フィルム４０のように、
光拡散領域４２の断面形状を透明基材フィルム１２側の
底辺が外側の上辺よりも幅の広い台形とし、透明領域４
４は光拡散領域４２と反対向きの台形状となるようにし
てもよい。For example, like the directional light diffusion film 40 according to the fourth embodiment of the present invention shown in FIG.
The cross-sectional shape of the light diffusion region 42 is a trapezoid whose bottom side on the transparent substrate film 12 side is wider than the upper side on the outside, and the transparent region 4
4 may have a trapezoidal shape opposite to the light diffusion region 42.
【００４２】次に、図５に示される本発明の実施の形態
の第５例に係る指向性光拡散フィルム５０について説明
する。Next, a directional light diffusing film 50 according to a fifth embodiment of the present invention shown in FIG. 5 will be described.
【００４３】この指向性光拡散フィルム５０は、前記実
施の形態の第１例〜第４例のいずれかにおける透明領域
５２及び光拡散領域５４の更に外側を覆って反射防止層
５６を積層したものである。This directional light diffusing film 50 is obtained by laminating an antireflection layer 56 so as to further cover the transparent region 52 and the light diffusing region 54 in any of the first to fourth examples of the above embodiment. It is.
【００４４】この反射防止層５６は、樹脂に馴染みの良
い材料、例えばチタン酸化物、ジルコニウム酸化物ある
いはケイ素酸化物等の単層あるいは多層の硬化膜等から
構成されている。多層の場合、高屈折率であるチタン酸
化物、ジルコニウム酸化物等、低屈折率であるケイ素酸
化物等を交互に積層するのが一般的である。The anti-reflection layer 56 is made of a material which is compatible with resin, for example, a single-layer or multi-layer cured film of titanium oxide, zirconium oxide or silicon oxide. In the case of a multilayer, it is common to alternately stack titanium oxide and zirconium oxide having a high refractive index and silicon oxide having a low refractive index alternately.
【００４５】なお、この反射防止層５６を設ける場合
は、透明領域５２は光拡散領域５４と同一厚さの光透過
性樹脂から構成し、両者の面一な表面に反射防止層５６
を形成する。When the anti-reflection layer 56 is provided, the transparent region 52 is made of a light-transmitting resin having the same thickness as the light diffusion region 54, and the anti-reflection layer 56 is formed on the both surfaces.
To form
【００４６】このように、反射防止層５６を設けた指向
性光拡散フィルム５０を、液晶表示装置における表示面
に取り付けた場合、外光による反射光が少ないので、画
像ボケを抑制することができる。As described above, when the directional light diffusing film 50 provided with the antireflection layer 56 is attached to the display surface of a liquid crystal display device, the amount of reflected light due to external light is small, so that image blur can be suppressed. .
【００４７】次に図６を参照して本発明の実施の形態の
第６例に係る指向性光拡散フィルム６０について説明す
る。Next, a directional light diffusing film 60 according to a sixth embodiment of the present invention will be described with reference to FIG.
【００４８】この指向性光拡散フィルム６０は、前記図
５に示される指向性光拡散フィルム５０における透明基
材フィルム１２の、前記透明領域５２、光拡散領域５４
と反対側の裏面に粘着層６２を形成したものである。The directional light diffusion film 60 is formed by the transparent region 52 and the light diffusion region 54 of the transparent base film 12 in the directional light diffusion film 50 shown in FIG.
The adhesive layer 62 is formed on the back surface on the opposite side to the above.
【００４９】この粘着層６２は、光透過性の粘着材を用
いる。The adhesive layer 62 uses a light-transmitting adhesive.
【００５０】このように、粘着層６２を設けると、例え
ば液晶表示装置における表示面に指向性光拡散フィルム
６０を容易に取り付けることができる。As described above, when the adhesive layer 62 is provided, the directional light diffusing film 60 can be easily attached to a display surface of a liquid crystal display device, for example.
【００５１】次に、図７に示される本発明の実施の形態
の第７例に係る指向性光拡散フィルム７０について説明
する。Next, a directional light diffusion film 70 according to a seventh embodiment of the present invention shown in FIG. 7 will be described.
【００５２】この指向性光拡散フィルム７０は、前記図
６に示される指向性光拡散フィルム６０の粘着層６２
に、偏光板７２を貼り付けたものである。The directional light diffusion film 70 is formed by the adhesive layer 62 of the directional light diffusion film 60 shown in FIG.
And a polarizing plate 72 is adhered thereto.
【００５３】この偏光板７２は、例えばポリビニールア
ルコール等の高分子膜に２色性を持たせたもの等であ
り、通常、液晶パネルにおける液晶素子を挟み込んでい
る一対の偏光板のうちの一方と同等とされている。The polarizing plate 72 is, for example, a polymer film made of polyvinyl alcohol or the like having dichroism, and is usually one of a pair of polarizing plates sandwiching a liquid crystal element in a liquid crystal panel. Is equivalent to
【００５４】この指向性光拡散フィルム７０は、偏光板
７２側を液晶素子に取り付けることによって、簡単に、
液晶表示装置の一部とすることができる。The directional light diffusing film 70 can be easily formed by attaching the polarizing plate 72 to the liquid crystal element.
It can be a part of a liquid crystal display device.
【００５５】前記透明基材フィルム１２を形成する透明
な材料としては、ポリエチレンテレフタレートの他に、
ポリブチレンテレフタレート等のポリエステル樹脂、ポ
リメチルメタクリレート等のアクリル樹脂、ポリカーボ
ネート樹脂、ポリスチレン樹脂、ポリメチルペンテン樹
脂等で、透過性がよいものが用いられる。透明領域１
４、３２、４４又は５４を構成する樹脂としては、ポリ
エステルアクリレート、ウレタンアクリレート、エポキ
シアクリレート等のオリゴマー及び／又はアクリレート
系のモノマー等からなる電離放射線硬化性樹脂を、紫外
線又は電子線等の電磁放射線で硬化させた樹脂等で透明
性のよいものが用いられる。このような樹脂の場合、そ
の屈折率が通常１．４〜１．６程度のものを用いる。As the transparent material for forming the transparent substrate film 12, besides polyethylene terephthalate,
A polyester resin such as polybutylene terephthalate, an acrylic resin such as polymethyl methacrylate, a polycarbonate resin, a polystyrene resin, a polymethyl pentene resin, or the like having good permeability is used. Transparent area 1
As the resin constituting 4, 32, 44 or 54, an ionizing radiation curable resin composed of an oligomer such as polyester acrylate, urethane acrylate or epoxy acrylate and / or an acrylate monomer, or an electromagnetic radiation such as ultraviolet ray or electron beam A resin with good transparency, such as a resin cured in step (1), is used. In the case of such a resin, a resin having a refractive index of about 1.4 to 1.6 is usually used.
【００５６】前記光拡散剤１５としてのビーズは、直径
が１〜１０μｍのポリメタクリル酸メチル（アクリル）
系ビーズ、ポリメタクリル酸ブチル系ビーズ、ポリカー
ボネイト系ビーズ、ポリウレタン系ビーズ、炭酸カルシ
ウム系ビーズ、シリカ系ビーズ等が用いられる。The beads as the light diffusing agent 15 are made of polymethyl methacrylate (acryl) having a diameter of 1 to 10 μm.
Beads, polybutyl methacrylate beads, polycarbonate beads, polyurethane beads, calcium carbonate beads, silica beads and the like are used.
【００５７】前記光拡散領域１６はバインダー樹脂によ
り光拡散剤１５を分散、固定したものであるが、このバ
インダー樹脂としては、アクリル、ポリスチレン、ポリ
エステル、ビニル重合体等の透明な材料が用いられる。The light diffusing region 16 is formed by dispersing and fixing the light diffusing agent 15 with a binder resin. As the binder resin, a transparent material such as acryl, polystyrene, polyester, and vinyl polymer is used.
【００５８】次に、上記のような指向性光拡散フィルム
１０、２０、３０、４０、５０、６０又は７０を用いた
表示装置の実施の形態の例について説明する。Next, an embodiment of a display device using the above-described directional light diffusion film 10, 20, 30, 40, 50, 60 or 70 will be described.
【００５９】この表示装置８０は、図８に示されるよう
に、液晶表示パネル８２の出光面側に前記偏光板７２を
含む指向性光拡散フィルム７０を取り付けたものであ
る。図８の符号８４は液晶表示素子、８６は前記偏光板
７２の反対側から液晶表示素子８４を挟み込む偏光板を
それぞれ示す。As shown in FIG. 8, the display device 80 has a directional light diffusing film 70 including the polarizing plate 72 attached to the light emitting surface of a liquid crystal display panel 82. In FIG. 8, reference numeral 84 denotes a liquid crystal display element, and 86 denotes a polarizing plate that sandwiches the liquid crystal display element 84 from the opposite side of the polarizing plate 72.
【００６０】この表示装置８０においては、前述のよう
に、指向性光拡散フィルム８４の表面に微細な透明領域
５２と光拡散領域５４が交互に形成されているので、光
拡散効果による正面輝度の低下及び視差を防止すると共
に、透明領域５２を通り拡散されることなく正面から出
射する光量を増大して、画像ボケを防止することができ
る。In the display device 80, as described above, the fine transparent regions 52 and the light diffusion regions 54 are alternately formed on the surface of the directional light diffusion film 84, so that the front luminance due to the light diffusion effect is reduced. In addition to preventing reduction and parallax, the amount of light emitted from the front without being diffused through the transparent region 52 can be increased to prevent image blur.
【００６１】なお、前記各透明領域１４、３２、４４、
５２はいずれも、その表面が平坦となっているが、これ
らの透明領域の表面は平坦な形状に限らず、例えば図９
に示すように、凸レンズ形状の透明領域８８Ａにもでき
るし、２点鎖線で示されるように、凹レンズ形状の透明
領域８８Ｂとすることもできる。レンズの形は図９では
曲線状であるが、それに限らずどのような形としてもよ
い。Each of the transparent areas 14, 32, 44,
52 has a flat surface, but the surface of these transparent regions is not limited to a flat shape.
As shown in the figure, the transparent area 88A may be formed in a convex lens shape, and as shown by a two-dot chain line, the transparent area 88B may be formed in a concave lens shape. Although the shape of the lens is curved in FIG. 9, the shape is not limited to this and may be any shape.
【００６２】次に、上記のような指向性光拡散フィルム
の製造方法について、図１０を参照して説明する。Next, a method of manufacturing the above-described directional light diffusing film will be described with reference to FIG.
【００６３】この製造方法を実施するための光拡散フィ
ルム製造装置９０は、前記光拡散領域１６、２２、３
４、４２又は５４あるいは前記透明領域１４、３２、４
４又は５２に対応する断面形状の賦形用凹部９２が、そ
の円周方向に等角度間隔で形成されているロール版９４
を用いて、このロール版９４に巻き付けられる透明基材
フィルム１２の表面に、光拡散領域あるいは透明領域と
なる樹脂９６を塗布、硬化させるものである。The light diffusion film manufacturing apparatus 90 for carrying out this manufacturing method includes the light diffusion regions 16, 22, and 3.
4, 42 or 54 or the transparent areas 14, 32, 4
Roll plate 94 in which shaping recesses 92 having a cross-sectional shape corresponding to 4 or 52 are formed at equal angular intervals in the circumferential direction.
Is applied to the surface of the transparent substrate film 12 wound around the roll plate 94, and a resin 96 to be a light diffusion region or a transparent region is applied and cured.
【００６４】更に詳細には、前記賦形用凹部９２には、
ロール版９４の下側に、このロール版９４の外周と接触
して配置された塗布装置９８から液状の紫外線硬化型の
樹脂９６を前記賦形用凹部９２に連続的に供給（塗布）
し、このロール版９４に、入側及び出側ガイドロール１
０２Ａ、１０２Ｂにより巻き付けられる前記透明基材フ
ィルム１２の内側面に、賦形用凹部９２内の前記樹脂９
６を接触させつつ、紫外線照射装置１００により、透明
基材フィルム１２を介して賦形用凹部９２内の紫外線硬
化型の樹脂９６に所定量の紫外線を照射して、透明基材
フィルム１２に接着した状態で硬化させる。More specifically, the shaping recess 92 has
A liquid ultraviolet curing resin 96 is continuously supplied (applied) to the shaping recess 92 from a coating device 98 disposed below the roll plate 94 in contact with the outer periphery of the roll plate 94.
The roll plate 94 is provided with the inlet and outlet guide rolls 1.
02A and 102B, the resin 9 in the shaping recess 92 is formed on the inner surface of the transparent base film 12.
6, a predetermined amount of ultraviolet light is applied to the ultraviolet curing resin 96 in the shaping concave portion 92 through the transparent base film 12 by the ultraviolet irradiation device 100 and adheres to the transparent base film 12. And cured.
【００６５】樹脂９６が透明基材フィルム１２に付着し
た状態で、出側ガイドロール１０２Ｂに沿って透明基材
フィルム１２がロール版９４から離間する際に、硬化し
た樹脂９６は賦形用凹部９２から抜け出る。With the resin 96 adhered to the transparent base film 12, when the transparent base film 12 is separated from the roll plate 94 along the exit guide roll 102B, the cured resin 96 is removed from the shaping recess 92. Get out of.
【００６６】その後、必要であれば、前記樹脂９６、９
６間の隙間に透明領域あるいは光拡散領域を形成する樹
脂を充填し、更に必要であれば、前述のように、反射防
止層５６、粘着層６２あるいは偏光板７２を積層する。Thereafter, if necessary, the resin 96, 9
The resin forming the transparent region or the light diffusion region is filled in the gap between 6, and if necessary, the antireflection layer 56, the adhesive layer 62, or the polarizing plate 72 is laminated as described above.
【００６７】この製造方法によれば、指向性光拡散フィ
ルムを連続的に且つ低コストで製造することができる。According to this manufacturing method, a directional light diffusing film can be manufactured continuously and at low cost.
【００６８】なお、透明領域と光拡散領域が、例えば図
３に示されるように、２次元方向に配列されている場合
は、前記賦形用凹部９２もロール版９４の軸方向及び円
周方向に２次元的に配置して構成する。When the transparent region and the light diffusion region are arranged in a two-dimensional direction, for example, as shown in FIG. 3, the shaping recesses 92 are also formed in the axial direction and the circumferential direction of the roll plate 94. Are arranged two-dimensionally.
【００６９】[0069]
【実施例】以下本発明の実施例を比較例と参照して説明
する。EXAMPLES Examples of the present invention will be described below with reference to comparative examples.
【００７０】実施例１〜４は、いずれも透明基材フィル
ムとして東洋紡製ＰＥＴフィルムＡ４３００、光拡散剤
として綜研化学製アクリルビーズＭＸ−５００Ｈを、大
日本インキ製紫外線硬化型樹脂ＲＣ１７−２３６に分量
２０ｇ／ｌの割合で混合し、図１０に示す本発明の指向
性光拡散フィルム製造方法にて光拡散領域を形成した。
又、透明領域としては樹脂を用いることなく、空間（空
気）とした。In each of Examples 1 to 4, PET film A4300 manufactured by Toyobo as a transparent base film and acrylic beads MX-500H manufactured by Soken Chemicals as a light diffusing agent were weighed into UV curable resin RC17-236 manufactured by Dainippon Ink. The mixture was mixed at a ratio of 20 g / l, and a light diffusion region was formed by the directional light diffusion film manufacturing method of the present invention shown in FIG.
In addition, the transparent region was a space (air) without using a resin.
【００７１】又、実施例５は、実施例１と同様に光拡散
領域を形成し、更に空間となっている透明領域に、大日
本インキ製紫外線硬化型樹脂ＲＣ１７−２３６を充填し
た後、紫外線硬化をおこなったものであり、透明領域が
樹脂からなる指向性光拡散フィルムを得た。In the fifth embodiment, a light diffusion region is formed in the same manner as in the first embodiment. Further, a transparent region, which is a space, is filled with a UV curable resin RC17-236 manufactured by Dainippon Ink, and then a UV light is applied. A directional light diffusing film which had been cured and had a transparent region made of resin was obtained.
【００７２】これらは、表１に示されるようなヘイズ値
及び全光線透過率で示される物性値に調整され、且つ、
図１２に示されるような断面形状、寸法とした４種類の
指向性光拡散フィルムである。又、比較例１〜３につい
ても、上記実施例１〜５と同様の材料により、透明領域
を設けることなく、透明基材フィルム上に塗工厚が硬化
後２０μｍとなるように、前記光拡散剤を含む紫外線硬
化型樹脂を塗布、硬化させた。These were adjusted to the physical properties indicated by the haze value and the total light transmittance as shown in Table 1, and
Four types of directional light diffusion films having a cross-sectional shape and dimensions as shown in FIG. Also in Comparative Examples 1 to 3, the light diffusion was performed using the same material as in Examples 1 to 5 above, without providing a transparent region, so that the coating thickness was 20 μm after curing on a transparent substrate film. An ultraviolet curable resin containing an agent was applied and cured.
【００７３】[0073]
【表１】 [Table 1]
【００７４】なお、ヘイズ値は東洋精機製ヘイズメータ
により、図１１に示されるように、実施例又は比較例の
フィルム１０１を治具１０２に挟持し、正面から光源１
０３により照射して、透過光を正面から受光部１０４に
受光して測定し、同様に、全光線透過率も測定した。The haze value was measured by a haze meter manufactured by Toyo Seiki, as shown in FIG.
No. 03, the transmitted light was received by the light receiving unit 104 from the front and measured. Similarly, the total light transmittance was also measured.
【００７５】これらをシャープ社製電子手帳ＰＩ−６５
００の画面１０６上に実装し、図１３に示されるように
目視にて効果を確認したところ、表２のような結果とな
った。These were obtained from Sharp Electronic Notebook PI-65.
The effect was visually confirmed as shown in FIG. 13 when mounted on the screen 106 of No. 00, and the results were as shown in Table 2.
【００７６】表２にも示されるように、比較例に対し
て、本発明の実施例１〜５はいずれの場合も、正面方向
の画像ボケはかなり改善された。又、光拡散効果の低減
は少なかった。As shown in Table 2, in each of Examples 1 to 5 of the present invention, the image blur in the front direction was considerably improved as compared with the comparative example. In addition, the reduction of the light diffusion effect was small.
【００７７】[0077]
【表２】 [Table 2]
【００７８】更に、上記のような実施例１〜４の指向性
光拡散フィルムに反射防止層を設けたところ、その各々
の反射率は表３に示されるようになった。Further, when an anti-reflection layer was provided on the directional light diffusing films of Examples 1 to 4 as described above, the respective reflectances were as shown in Table 3.
【００７９】[0079]
【表３】 [Table 3]
【００８０】[0080]
【発明の効果】本発明は上記のように構成したので、光
拡散機能による正面輝度の低下と視差を防止すると共
に、正面方向の出光量を増やして画像ボケを防止するこ
とができるという優れた効果を有する。Since the present invention is constructed as described above, it is possible to prevent a decrease in front luminance and a parallax due to the light diffusion function, and it is possible to prevent the image blur by increasing the amount of light output in the front direction. Has an effect.
【図１】本発明の実施の形態の第１例に係る指向性光拡
散フィルムの一部を示す拡大断面図FIG. 1 is an enlarged cross-sectional view showing a part of a directional light diffusion film according to a first example of an embodiment of the present invention.
【図２】同実施の形態の第２例に係る指向性光拡散フィ
ルムを示す図１と同様の拡大断面図FIG. 2 is an enlarged sectional view similar to FIG. 1, showing a directional light diffusing film according to a second example of the embodiment.
【図３】本発明の実施の形態の第３例に係る指向性光拡
散フィルムの一部を拡大して示す平面図FIG. 3 is an enlarged plan view showing a part of a directional light diffusion film according to a third embodiment of the present invention;
【図４】同実施の形態の第４例に係る指向性光拡散フィ
ルムの一部を示す拡大断面図FIG. 4 is an enlarged cross-sectional view showing a part of a directional light diffusion film according to a fourth example of the embodiment.
【図５】同実施の形態の第５例に係る指向性光拡散フィ
ルムの一部を示す拡大断面図FIG. 5 is an enlarged cross-sectional view showing a part of a directional light diffusion film according to a fifth example of the embodiment.
【図６】同実施の形態の第６例に係る指向性光拡散フィ
ルムの一部を示す拡大断面図FIG. 6 is an enlarged sectional view showing a part of a directional light diffusion film according to a sixth example of the embodiment.
【図７】同実施の形態の第７例に係る指向性光拡散フィ
ルムの一部を示す拡大断面図FIG. 7 is an enlarged sectional view showing a part of a directional light diffusion film according to a seventh example of the embodiment.
【図８】同実施の形態の第８例に係る液晶表示装置の一
部を示す拡大断面図FIG. 8 is an enlarged sectional view showing a part of a liquid crystal display according to an eighth example of the embodiment.
【図９】本発明の指向性光拡散フィルムにおける透明領
域の他の実地の形態の一部を示す拡大断面図FIG. 9 is an enlarged sectional view showing a part of another practical form of the transparent region in the directional light diffusion film of the present invention.
【図１０】上記指向性光拡散フィルムの製造過程を示す
略示断面図FIG. 10 is a schematic sectional view showing a manufacturing process of the directional light diffusing film.
【図１１】本発明の指向性光拡散フィルムの実施例及び
比較例のヘイズ値、全光線透過率測定方法を示す光学配
置図FIG. 11 is an optical arrangement diagram showing a method for measuring haze value and total light transmittance of Examples and Comparative Examples of the directional light diffusing film of the present invention.
【図１２】上記実施例の指向性光拡散フィルムを拡大し
て示す断面図FIG. 12 is an enlarged sectional view showing the directional light diffusing film of the above embodiment.
【図１３】上記実施例及び比較例での表示光を確認する
過程を示す断面図FIG. 13 is a cross-sectional view showing a process of confirming display light in the example and the comparative example.
１０、２０、３０、４０、５０、６０、７０…指向性光
拡散フィルム １２…透明基材フィルム １４、３２、４４、５２、８８Ａ、８８Ｂ…透明領域 １６、２２、３４、４２、５４…光拡散領域 ２４…凹凸面 ５６…反射防止層 ６２…粘着層 ７２…偏光板 ８０…表示装置 ８２…液晶表示パネル ９２…賦形用凹部 ９４…ロール版 ９６…樹脂 ９８…塗布装置 １００…紫外線照射装置10, 20, 30, 40, 50, 60, 70 directional light diffusion film 12 transparent substrate film 14, 32, 44, 52, 88A, 88B transparent region 16, 22, 34, 42, 54 light Diffusion region 24 ... Concave surface 56 ... Anti-reflective layer 62 ... Adhesive layer 72 ... Polarizing plate 80 ... Display device 82 ... Liquid crystal display panel 92 ... Shaping concave portion 94 ... Roll plate 96 ... Resin 98 ... Coating device 100 ... Ultraviolet irradiation device
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｂ２９Ｌ 11:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) // B29L 11:00
Claims (17)
と、厚さ方向に透過する光を拡散する微細な光拡散領域
とを、透明基材フィルムの表面又は裏面の少なくとも一
方に沿って、その１次元方向又は２次元方向に交互に隙
間なく配列したことを特徴とする指向性光拡散フィル
ム。A fine transparent region for transmitting light in the thickness direction and a fine light diffusion region for diffusing light transmitted in the thickness direction are formed along at least one of the front surface and the back surface of the transparent substrate film. A directional light-diffusing film, which is alternately arranged without gaps in the one-dimensional direction or the two-dimensional direction.
記表面又は裏面と直交する断面の形状が多角形とされた
ことを特徴とする指向性光拡散フィルム。2. The directional light diffusion film according to claim 1, wherein the light diffusion region has a polygonal cross section orthogonal to the front surface or the back surface.
と透明領域とを、交互に配列された平行な直線帯状に構
成したことを特徴とする指向性光拡散フィルム。3. The directional light diffusing film according to claim 1, wherein the light diffusing region and the transparent region are formed in parallel linear bands alternately arranged.
領域は、透光性樹脂に光拡散剤を含ませて構成されたこ
とを特徴とする指向性光拡散フィルム。4. The directional light diffusion film according to claim 1, wherein the light diffusion region is formed by adding a light diffusion agent to a light transmitting resin.
光拡散領域と前記透明領域との境界を、微細な凹凸が形
成された凹凸面としたことを特徴とする指向性光拡散フ
ィルム。5. The directional light diffusion film according to claim 1, wherein a boundary between the light diffusion region and the transparent region is an uneven surface on which fine unevenness is formed.
透明領域の表面が、凸レンズ形状及び凹レンズ形状の一
方とされたことを特徴とする指向性光拡散フィルム。6. The directional light diffusing film according to claim 1, wherein the surface of the transparent region has one of a convex lens shape and a concave lens shape.
光拡散領域及び透明領域の外側を覆って反射防止層を設
けたことを特徴とする指向性光拡散フィルム。7. The directional light diffusion film according to claim 1, wherein an anti-reflection layer is provided so as to cover the outside of the light diffusion region and the transparent region.
表面又は裏面の少なくとも一方側に、更に光透過性の粘
着層を積層したことを特徴とする指向性光拡散フィル
ム。8. The directional light diffusing film according to claim 1, further comprising a light-transmitting adhesive layer laminated on at least one of the front surface and the back surface.
表面又は裏面の少なくとも一方側に、更に、偏光板を積
層したことを特徴とする指向性光拡散フィルム。9. The directional light diffusion film according to claim 1, further comprising a polarizing plate laminated on at least one of the front surface and the back surface.
表示装置における表面側の偏光板であることを特徴とす
る指向性光拡散フィルム。10. The directional light diffusing film according to claim 9, wherein said polarizing plate is a polarizing plate on a front side of a liquid crystal display device.
前記透明領域を透光性樹脂により構成したことを特徴と
する指向性光拡散フィルム。11. The method according to claim 1, wherein
A directional light diffusing film, wherein the transparent region is made of a translucent resin.
前記透明領域を空間としたことを特徴とする指向性光拡
散フィルム。12. The method according to claim 1, wherein
A directional light diffusion film, wherein the transparent region is a space.
この表示パネルの表示面に積層された指向性光拡散フィ
ルムと、を有してなり、この指向性光拡散フィルムは、
光を厚さ方向に透過する微細な透明領域と、厚さ方向に
透過する光を拡散する微細な光拡散領域とを、透明基材
フィルムの表面又は裏面の少なくとも一方に沿って、そ
の１次元方向又は２次元方向に交互に隙間なく配列して
構成されたことを特徴とする表示装置。13. A display panel for displaying an image by pixels,
A directional light diffusion film laminated on the display surface of the display panel, and the directional light diffusion film
A fine transparent region that transmits light in the thickness direction and a fine light diffusion region that diffuses light that transmits in the thickness direction are formed in one dimension along at least one of the front surface and the back surface of the transparent substrate film. A display device characterized by being arranged in a direction or a two-dimensional direction alternately without a gap.
フィルムを、光透過性の粘着層を介して前記表示パネル
の表示面に張り付けたことを特徴とする表示装置。14. The display device according to claim 13, wherein the directional light diffusion film is attached to a display surface of the display panel via a light-transmitting adhesive layer.
液晶表示パネルであり、前記指向性光拡散フィルムを、
前記光透過性の粘着層を介して前記液晶表示パネルの表
面側の偏光板に張り付けたことを特徴とする表示装置。15. The display panel according to claim 14, wherein the display panel is a liquid crystal display panel, and the directional light diffusion film is
A display device, wherein the display device is attached to a polarizing plate on a surface side of the liquid crystal display panel via the light transmitting adhesive layer.
さ方向に透過する微細な透明領域と、厚さ方向に透過す
る光を拡散する微細な光拡散領域とを、前記一方の面に
沿う１次元又は２次元方向に交互に隙間なく配列してな
る指向性光拡散フィルムの製造方法において、円周方向
に複数の賦形用凹部が間欠的に形成されたロール版の、
前記賦形用凹部に流動状態の樹脂を塗布しつつ、且つ、
前記ロール版の外周に透明基材フィルムを巻き掛けて、
前記賦形用凹部内の樹脂に接触させつつ、ロール版を回
転させる工程と、このロール版の回転中に、前記賦形用
凹部内の樹脂を透明基材フィルムに密着して硬化させ
て、光拡散領域又は光透過領域の一方とする工程と、硬
化した樹脂と共に透明基材フィルムをロール版から剥離
する工程と、を有してなる指向性光拡散フィルムの製造
方法。16. A fine transparent region for transmitting light in the thickness direction and a fine light diffusion region for diffusing light transmitting in the thickness direction are provided on one surface of the transparent base material film. In a method for manufacturing a directional light diffusing film, which is arranged without gaps in one-dimensional or two-dimensional directions along a surface, a roll plate in which a plurality of shaping recesses are formed intermittently in a circumferential direction.
While applying the resin in a fluid state to the shaping recess, and
Wrap a transparent substrate film around the outer periphery of the roll plate,
A step of rotating the roll plate while being in contact with the resin in the shaping recess, and during rotation of the roll plate, the resin in the shaping recess is brought into close contact with the transparent base film and cured, A method for producing a directional light diffusion film, comprising: a step of forming one of a light diffusion area and a light transmission area; and a step of peeling a transparent substrate film from a roll plate together with a cured resin.
に、前記光拡散領域又は光透過領域の一方を構成する硬
化した樹脂の間の隙間に、光拡散領域又は光透過領域の
他方を構成する樹脂を充填、硬化させる工程を有してな
る指向性光拡散フィルムの製造方法。17. The light-diffusing region or the light-transmitting region according to claim 16, wherein, after the peeling step, the other of the light-diffusing region and the light-transmitting region is formed in a gap between the cured resins forming one of the light-diffusing region and the light-transmitting region. A method for producing a directional light diffusing film, comprising a step of filling and curing a resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11121172A JP2000056105A (en) | 1998-06-05 | 1999-04-28 | Directional light diffusing film, its manufacture and display device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10-157940 | 1998-06-05 | ||
| JP15794098 | 1998-06-05 | ||
| JP11121172A JP2000056105A (en) | 1998-06-05 | 1999-04-28 | Directional light diffusing film, its manufacture and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000056105A true JP2000056105A (en) | 2000-02-25 |
Family
ID=26458599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11121172A Pending JP2000056105A (en) | 1998-06-05 | 1999-04-28 | Directional light diffusing film, its manufacture and display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000056105A (en) |
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