JP2001074919A - Light diffusing body and its production - Google Patents
Light diffusing body and its productionInfo
- Publication number
- JP2001074919A JP2001074919A JP25048499A JP25048499A JP2001074919A JP 2001074919 A JP2001074919 A JP 2001074919A JP 25048499 A JP25048499 A JP 25048499A JP 25048499 A JP25048499 A JP 25048499A JP 2001074919 A JP2001074919 A JP 2001074919A
- Authority
- JP
- Japan
- Prior art keywords
- less
- light diffuser
- rough
- irregularities
- fine
- 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
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は光拡散体およびその
製造方法に関し、特に液晶表示装置等の表示装置に最外
層に設けられ、表面に映り込む不快感を軽減する表面反
射率低減機能と拡散反射機能とを有する光拡散フィルム
等に好適な光拡散体およびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light diffuser and a method for manufacturing the same, and more particularly, to a surface reflectivity reducing function and a diffuser provided on an outermost layer of a display device such as a liquid crystal display device to reduce discomfort reflected on the surface. The present invention relates to a light diffuser suitable for a light diffusion film or the like having a reflection function and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】液晶表示装置等の表示装置の表示面を観
視する際、室内の表明装置や明るい窓、屋外での太陽光
等が表示面に映り込むと、表示面を観視する際に不快感
を感じることがある。この不快感を低減するために液晶
表示装置等の表示装置の最表面に設置される光拡散体の
表面の平滑度を下げ、光が光拡散体表面を拡散性反射さ
せるための防眩処理が行われている。この防眩処理によ
って、光拡散体の表面に映り込んでいる物体の像がぼや
ける結果、観視者は、その物体を視認しにくくなり、表
示内容を注視する際の障害とならない。2. Description of the Related Art When viewing a display surface of a display device such as a liquid crystal display device, when an indoor display device, a bright window, sunlight outdoors, etc. are reflected on the display surface, the display surface may be viewed. You may feel uncomfortable. In order to reduce this discomfort, the anti-glare treatment for lowering the smoothness of the surface of the light diffuser installed on the outermost surface of a display device such as a liquid crystal display device and causing light to diffusely reflect the light diffuser surface is performed. Is being done. As a result of the anti-glare treatment, the image of the object reflected on the surface of the light diffuser is blurred, so that it becomes difficult for a viewer to visually recognize the object, and does not become an obstacle when gazing at the display content.
【０００３】しかしながら、上記の防眩処理によって光
拡散体表面の平滑度が低下すると、表示装置から光拡散
体を透過する光も光拡散体表面での屈折によって拡散す
るようになるので、透過画像がぼける弊害がある。この
弊害のために、前記防眩処理のみによって不快感を低減
することには限界があり、表面の反射率を低減する加工
と併用して実質的に大きな効果が得られる。However, if the smoothness of the surface of the light diffuser is reduced by the above-described anti-glare treatment, the light transmitted through the light diffuser from the display device is also diffused by refraction on the surface of the light diffuser, so that the transmitted image There is an adverse effect of blurring. Because of this adverse effect, there is a limit in reducing the discomfort by only the anti-glare treatment, and a substantially large effect can be obtained in combination with the processing for reducing the surface reflectance.
【０００４】[0004]
【発明が解決しようとする課題】一般に表面反射率低減
機能を発揮される加工は、通常、多層薄膜の光干渉によ
って製造され、また、一般に防眩効果を発揮できるよう
な粗状凹凸は、通常、エンボス加工法によりそれぞれ製
造されている。したがって、表面反射機能を発揮させる
ための凹凸や防眩効果を発揮できるような粗状凹凸の双
方を光拡散体の表面に形成するためには、異なる２つの
製造装置を用いて製造する方法が考えられるが、製造工
程が多く煩雑となり、しかも製造コストが高くなる問題
があり、特に多層薄膜の光干渉による方法は、真空設備
を必要としているため低コスト化には限界がある。In general, a process for exhibiting a surface reflectivity reducing function is usually produced by optical interference of a multilayer thin film. And embossing methods. Therefore, in order to form both the unevenness for exhibiting the surface reflection function and the rough unevenness capable of exhibiting the antiglare effect on the surface of the light diffuser, a method of manufacturing using two different manufacturing apparatuses is necessary. Although it is conceivable, there is a problem that the manufacturing process is complicated and the manufacturing cost is high. In particular, the method using the optical interference of the multilayer thin film requires vacuum equipment, so there is a limit to the cost reduction.
【０００５】本発明の第１の目的は、液晶表示装置等の
表示装置の表示面の光の拡散機能により透過画像の鮮鋭
度を低下させることなく、表示面が室内の証明装置や明
るい窓、屋外の太陽光等の映りこみを防止し、表示面を
観視する際に不快感を感じることのない光拡散体を提供
することにある。本発明の第２の目的は、上記の特性を
有する光拡散体を簡単な装置および簡便な工程により製
造することができる光拡散体の製造方法を提供すること
にある。A first object of the present invention is to reduce the sharpness of a transmitted image by a light diffusion function of a display surface of a display device such as a liquid crystal display device, and to reduce the sharpness of a transmitted image in an indoor certification device or a bright window. An object of the present invention is to provide a light diffuser which prevents reflection of outdoor sunlight and the like and does not cause any discomfort when viewing a display surface. A second object of the present invention is to provide a method for manufacturing a light diffuser capable of manufacturing a light diffuser having the above-mentioned characteristics with a simple device and simple steps.
【０００６】[0006]
【課題を解決するための手段】上記した第１の目的は、
表面に、空間周期が１μm以上５０μm以下で、かつ高低
差が０．１μm以上２０μm以下の粗状凹凸と、この粗状
凹凸面上に空間周期が０．３μm以下で、かつ高低差が
０．０１μm以上の微細状凹凸と、を有することを特徴
とする光拡散体によって達成される。また、上記の光拡
散体において、空間周期が２μm以上４０μm以下で、か
つ高低差が２μm以上１５μm以下の粗状凹凸と、この粗
状凹凸面上に空間周期が０．０２μm以上０．１５μm以
下で、かつ高低差が０．０２μm以上０．１５μm以下の
微細状凹凸と、を有することが望ましい。SUMMARY OF THE INVENTION The first object described above is intended to provide:
Coarse irregularities having a spatial period of 1 μm or more and 50 μm or less and a height difference of 0.1 μm or more and 20 μm or less on the surface, and a spatial period of 0.3 μm or less and a height difference of 0. This is achieved by a light diffuser characterized by having fine irregularities of not less than 01 μm. Further, in the above-mentioned light diffuser, the spatial period is 2 μm or more and 40 μm or less, and the height difference is 2 μm or more and 15 μm or less, and the spatial period is 0.02 μm or more and 0.15 μm or less on the rough uneven surface. It is desirable to have fine irregularities having a height difference of 0.02 μm or more and 0.15 μm or less.
【０００７】さらに上記した第２の目的は、支持体上に
球状粒子が並設された粒子層が形成され、この粒子層上
に該粒子よりも径が小さい微細粒子が重畳された面に流
動状態の材料を接触させた後硬化させ、得られた硬化物
を鋳型に用いて光拡散体を製造することを特徴とする光
拡散体の製造方法によって達成される。さらに支持体上
に、１μm以上５０μm以下の径からなる球状粒子が固着
され、この球状粒子層上に０．３μm以下の径からなる
微細粒子が重畳された面に流動状態の材料を接触させた
後硬化させ、得られた硬化物を鋳型に用いて光拡散体を
製造することが望ましい。特に支持体上に、２μm以上
４０μm以下の径からなる球状粒子が固着され、この球
状粒子層上に０．０２μm以上０．１５μm以下の径から
なる微細粒子が重畳された面に流動状態の材料を接触さ
せた後硬化させ、得られた硬化物を鋳型に用いて光拡散
体を製造することが望ましい。A second object of the present invention is to form a particle layer in which spherical particles are juxtaposed on a support, and flow onto a surface on which fine particles having a smaller diameter than the particles are superimposed on the particle layer. This is achieved by a method for producing a light diffuser, which comprises contacting a material in a state and then curing, and using the obtained cured product as a mold to produce a light diffuser. Further, spherical particles having a diameter of 1 μm or more and 50 μm or less are fixed on the support, and a material in a flowing state is brought into contact with a surface on which the fine particles having a diameter of 0.3 μm or less are superimposed on the spherical particle layer. It is desirable to perform post-curing and produce a light diffuser using the obtained cured product as a mold. In particular, a material in a flowing state is fixed on a surface where spherical particles having a diameter of 2 μm or more and 40 μm or less are fixed on a support, and fine particles having a diameter of 0.02 μm or more and 0.15 μm or less are superimposed on the spherical particle layer. And then cured, and the resulting cured product is preferably used as a mold to produce a light diffuser.
【０００８】本発明のよれば、光拡散体の表面形状は、
粗状凹凸と、光の波長よりも短い空間周期による微細状
凹凸が形成されている。その表面の微細状凹凸によっ
て、光を乱反射することなく、平均的に屈折率が厚さ方
向に連続的に変化している平滑な面があるかの如く振舞
う。すなわち、光は、凹凸面とは反対の面側の屈折率に
近い値から、空気の屈折率に近い値まで連続的に屈折率
が変化している膜が形成されているのと同じにように振
舞う。したがって、光における光反射率が低減し、表面
反射率低減機能を発揮する。一方、上記の粗状凹凸によ
って拡散反射機能を有する結果、表面への映り込みによ
る不快感を大きく低減することができる。反射率低減機
能と併用する効果により防眩機能のための粗状凹凸の程
度をその弊害が顕著にならない範囲に留めることができ
る。According to the present invention, the surface shape of the light diffuser is:
Rough irregularities and fine irregularities with a spatial period shorter than the wavelength of light are formed. Due to the fine irregularities on the surface, the light behaves as if there is a smooth surface whose refractive index continuously changes in the thickness direction on average without irregularly reflecting light. In other words, light is similar to a film in which the refractive index is continuously changed from a value close to the refractive index on the side opposite to the uneven surface to a value close to the refractive index of air. To behave. Therefore, the light reflectance of light is reduced, and a function of reducing surface reflectance is exhibited. On the other hand, as a result of having a diffuse reflection function by the above-mentioned rough unevenness, discomfort due to reflection on the surface can be greatly reduced. By the effect used in combination with the reflectance reducing function, the degree of the rough unevenness for the antiglare function can be kept in a range where the adverse effect is not remarkable.
【０００９】本発明の光拡散体の製造方法によれば、支
持体上に球状粒子が並設された粒子層が形成され、この
粒子層に該粒子よりも径が小さい微細状粒子を重畳され
た面に流動状態の材料を接触させた後硬化させると、球
状粒子と、微細状粒子の形状にそれぞれ対応した凹凸面
を有する鋳型が形成される。この鋳型を用いて硬化性材
料を成形すると、粗状凹凸と微細状凹凸を有する光拡散
体が１回の工程が製造可能となる。According to the method for producing a light diffuser of the present invention, a particle layer in which spherical particles are juxtaposed is formed on a support, and fine particles having a smaller diameter than the particles are superimposed on the particle layer. When a material in a fluidized state is brought into contact with the cured surface and then cured, a mold having irregularities corresponding to the shapes of the spherical particles and the fine particles is formed. When a curable material is molded using this mold, a light diffuser having rough irregularities and fine irregularities can be manufactured in one process.
【００１０】[0010]
【発明の実施の形態】以下、本発明の好ましい実施の形
態を説明する。本発明の光拡散体の一実施の形態を図１
に基づいて説明する。図１は、光拡散体の要部拡大断面
図である。図１中、１０は粗状凹凸を示し、１２は微細
状凹凸を示す。この粗状凹凸と微細状凹凸のそれぞれの
空間周期と高低差が所定の範囲にあることが重要であ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described. FIG. 1 shows an embodiment of the light diffuser of the present invention.
It will be described based on. FIG. 1 is an enlarged sectional view of a main part of the light diffuser. In FIG. 1, reference numeral 10 denotes rough irregularities, and 12 denotes fine irregularities. It is important that the spatial period and the height difference between the rough irregularities and the fine irregularities are within a predetermined range.
【００１１】粗状凹凸の空間周期とは、粗状凹凸１０面
の各々の凹部の底部とこれらの各々の隣接する凹部の底
部との間の距離（図１では、例えば、距離Ａ、距離Ｂ、
距離Ｃ・・・・等）を意味し、本発明における粗状凹凸
の空間周期の値は、これらの距離の最大値と最小値の範
囲を意味する。また、微細状凹凸の空間周期とは、微細
状凹凸１２面の各々の凹部の底部とこれらの各々の隣接
する凹部の底部との間の距離を意味し、本発明における
微細状凹凸の空間周期の値は、これらの距離の最大値と
最小値の範囲を意味する。The spatial period of the rough unevenness is defined as the distance between the bottom of each recess on the surface of the rough unevenness 10 and the bottom of each adjacent recess (in FIG. 1, for example, distance A, distance B). ,
..), And the value of the spatial period of the rough unevenness in the present invention means a range between the maximum value and the minimum value of these distances. The spatial period of the fine irregularities means the distance between the bottom of each concave portion of the fine irregularities 12 surface and the bottom of each adjacent concave portion, and the spatial period of the fine irregularities in the present invention. Means a range between the maximum value and the minimum value of these distances.
【００１２】上記した意味での粗状凹凸の空間周期は、
１μｍ以上５０μｍ以下であることが必要であり、好ま
しくは２μｍ以上４０μｍ以下、より好ましくは５μｍ
以上３０μｍ以下である。粗状凹凸の空間周期が１μｍ
未満では可視光の波長領域であるため干渉が発生し、５
０μｍを超えると目視解像度に接近するため表面の肌理
が粗く感じられるようになり光拡散効果が低減する。ま
た、上記した意味での微細状凹凸の空間周期は、０．３
μｍ以下であることが必要であり、好ましくは０．０２
μｍ以上０．１５μｍ以下、より好ましくは０．０３μ
ｍ以上０．１０μｍ以下である。微細状凹凸の空間周期
が０．３μｍを超えると、可視光の波長の二分の一の領
域であるため、不規則かつ予測しえない干渉が発生し、
目視すると微小な色のチラツキが見えるようになり，表
面反射率低減機能が低下する。The spatial period of the rough irregularities in the above sense is as follows:
It is necessary to be 1 μm or more and 50 μm or less, preferably 2 μm or more and 40 μm or less, more preferably 5 μm or less.
Not less than 30 μm. The spatial period of the rough unevenness is 1 μm
If it is less than 5 mm, interference occurs because the wavelength is in the visible light wavelength range.
If it exceeds 0 μm, the visual resolution approaches, and the texture of the surface becomes rough, and the light diffusion effect is reduced. The spatial period of the fine irregularities in the above-mentioned meaning is 0.3
μm or less, and preferably 0.02 μm or less.
μm or more and 0.15 μm or less, more preferably 0.03 μm
m and 0.10 μm or less. If the spatial period of the fine irregularities exceeds 0.3 μm, since it is a half region of the wavelength of visible light, irregular and unpredictable interference occurs,
Visually, flickering of a minute color becomes visible, and the function of reducing surface reflectance is reduced.
【００１３】上記した粗状凹凸の高低差は、粗状凹凸の
凸部とこれに隣接する凸部との間の高低差を意味し、例
えば、図１において、距離Ｈ1、距離Ｈ2等を意味する。
したがって、本発明における粗状凹凸の高低差は、上記
した距離Ｈ1、距離Ｈ2等の最大値と最小値との範囲を意
味する。粗状凹凸の高低差は、１μｍ以上２０μm以下
であることが必要であり、好ましくは２μm以上１５μm
以下、より好ましくは３μm以上１０μm以下である。で
ある。粗状凹凸の高低差が１μm未満で、かつ２０μmを
超えると拡散機能が不充分または透過光像がぼける弊害
が顕著となり、拡散反射機能が低下する。上記した微細
状凹凸の高低差も、粗状凹凸と同様に微細状凹凸の凸部
とこれに隣接する凸部との間の高低差を意味し、高低差
の値は、これらの最大値と最小値の範囲である。微細状
凹凸の高低差は、０．０１μｍ以上であることが必要で
あり、好ましくは０．０２μm以上０．１５μm以下、よ
り好ましくは０．０３μm以上０．１μm以下である。微
細状凹凸の高低差が０．０１μm未満であると、この厚
さ距離内での平均屈折率の変化が急激となり、表面反射
率低減機能が低下する。The above-mentioned height difference of the rough unevenness means a height difference between the convex portion of the rough unevenness and the adjacent convex portion. For example, in FIG. 1, the distance H 1 , the distance H 2, etc. Means
Therefore, the height difference between the crude-like unevenness in the present invention means the range between the maximum value and the minimum value of such distance H 1, the distance H 2 as described above. The height difference of the rough unevenness needs to be 1 μm or more and 20 μm or less, preferably 2 μm or more and 15 μm or less.
The thickness is more preferably 3 μm or more and 10 μm or less. It is. If the height difference of the rough unevenness is less than 1 μm and more than 20 μm, the diffusion function is insufficient or the adverse effect of blurring the transmitted light image becomes remarkable, and the diffuse reflection function decreases. The height difference of the fine irregularities described above also means the height difference between the convex portion of the fine irregularities and the adjacent convex portion like the rough irregularities, and the value of the height difference is the maximum value of these. It is the range of the minimum value. The height difference of the fine irregularities needs to be 0.01 μm or more, preferably 0.02 μm or more and 0.15 μm or less, more preferably 0.03 μm or more and 0.1 μm or less. If the height difference of the fine irregularities is less than 0.01 μm, the change in the average refractive index within this thickness distance becomes sharp, and the function of reducing the surface reflectance is reduced.
【００１４】本発明の光拡散体において、上記した凹凸
面が形成される面は、平面状あるいは曲面状の面に形成
され、これらの面と反対側の面は平滑面であることが望
ましい。光拡散体は、ガラス、硬化した樹脂、あるいは
金属酸化物等からなり、透明性を有することが望まし
い。In the light diffuser of the present invention, the surface on which the above-mentioned uneven surface is formed is preferably a flat or curved surface, and the surface opposite to these surfaces is desirably a smooth surface. The light diffuser is made of glass, cured resin, metal oxide, or the like, and desirably has transparency.
【００１５】次に本発明の光拡散体を製造する方法を図
２および図３に基づいて説明する。図２は本発明の光拡
散体の製造方法の好ましい一実施の形態を示す工程図で
ある。図２（ａ）に示すように、支持体２０上に粗状凹
凸を形成するためのビーズ２２がバインダー２４を介し
て固着されている。Next, a method for manufacturing the light diffuser of the present invention will be described with reference to FIGS. FIG. 2 is a process chart showing a preferred embodiment of the method for producing a light diffuser of the present invention. As shown in FIG. 2A, beads 22 for forming rough irregularities are fixed on a support 20 via a binder 24.
【００１６】支持体２０は、耐溶媒性、耐熱性、耐収縮
性等に優れた材質であれば特に制約はなく、ガラス板、
金属板、プラスチックフィルムないしシート等が使用で
き、プラスチックフィルムないしシートの場合、特に上
記の特性に優れている点からポリエチレンテレフタレー
トが好適である。The support 20 is not particularly limited as long as it is a material having excellent solvent resistance, heat resistance, shrinkage resistance and the like.
A metal plate, a plastic film or sheet, or the like can be used. In the case of a plastic film or sheet, polyethylene terephthalate is particularly preferable because of its excellent properties.
【００１７】ビーズ２２は、粗状凹凸を形成するために
必要な径を有する球状粒子であり、少なくとも２種、ま
たは３種の異なる径を有する球状粒子が好ましい。球状
粒子の径が実質的に同じもののみを使用すると、局部的
にハニカム様の結晶性規則的な配列した領域が多数発生
し、トタン板のような反射テクスチャとなりやすくな
り、拡散反射機能が低下する。ビーズ２２の径は、１μ
m以上５０μm以下であることが好ましく、より好ましく
は２μm以上４０μm以下である。この理由は、光拡散体
における粗状凹凸の空間周期における理由と実質的に同
じである。The beads 22 are spherical particles having a diameter necessary for forming rough irregularities, and are preferably spherical particles having at least two kinds or three kinds of different diameters. If only spherical particles of substantially the same diameter are used, a large number of locally-shaped honeycomb-like crystalline regularly arranged regions are likely to be generated, which tends to result in a tin plate-like reflective texture, and the diffuse reflection function is reduced. I do. The diameter of the beads 22 is 1 μm
It is preferably not less than m and not more than 50 μm, more preferably not less than 2 μm and not more than 40 μm. The reason for this is substantially the same as the reason for the spatial period of the rough irregularities in the light diffuser.
【００１８】ビーズ２２の材質としては、金属、プラス
チック等から任意に選定可能であるが、ビーズ２２をバ
インダー２４を介して支持体２０に固着させる点から樹
脂が好ましく、特にアクリル系樹脂が好ましい。バイン
ダー２４はビーズ２２の種類によって選定され、ビーズ
２２がアクリル系樹脂の場合、アクリル系バインダーが
好ましく用いられる。ビーズ２２をバインダー２４を介
して支持体２０に固着させるには、ビーズ２２を支持体
２０の表面に固着させるのに充分で、かつビーズ２２に
よる凹凸が埋没しない程度に少量のバインダー２４を介
して固着される。The material of the beads 22 can be arbitrarily selected from metals, plastics, and the like. However, a resin is preferable because the beads 22 are fixed to the support 20 via the binder 24, and an acrylic resin is particularly preferable. The binder 24 is selected according to the type of the beads 22, and when the beads 22 are an acrylic resin, an acrylic binder is preferably used. In order to fix the beads 22 to the support 20 via the binder 24, it is sufficient to fix the beads 22 to the surface of the support 20, and a small amount of the binder 24 is used so that the irregularities due to the beads 22 are not buried. It is fixed.
【００１９】次に図２（ｂ）に示すように、ビーズ２２
上には微細状凹凸を形成するための微細状粒子が重畳さ
れる。この微細状粒子２６は径が０．３μm以下、好ま
しくは０．０２μm以上０．１５μm以下、より好ましく
は０．０３μm以上０．１０μm以下が望ましい。微細状
粒子としては、コロイダルシリカや酸化チタン等の金属
酸化物や半金属酸化物等が挙げられるが、これらの粒子
の中で、特にコロイダルシリカの微粒子が好ましい。Next, as shown in FIG.
Fine particles for forming fine irregularities are superimposed on the fine particles. The fine particles 26 have a diameter of 0.3 μm or less, preferably 0.02 μm or more and 0.15 μm or less, and more preferably 0.03 μm or more and 0.10 μm or less. Examples of the fine particles include metal oxides and semimetal oxides such as colloidal silica and titanium oxide, and among these particles, colloidal silica fine particles are particularly preferable.
【００２０】これらの微細状粒子２６を、ビーズ２２上
に重畳させるには、微細状粒子２６のゾルを形成し、バ
インダーとしての樹脂溶液等に分散してこの液をスピン
コーター等の塗布手段により塗布することが望ましい。In order to superimpose the fine particles 26 on the beads 22, a sol of the fine particles 26 is formed, dispersed in a resin solution or the like as a binder, and this liquid is applied by a coating means such as a spin coater. It is desirable to apply.
【００２１】このように、支持体２０上にビーズ２２が
並設され、このビーズ２２上に微細状粒子２６が重畳さ
れた状態で型取りが行われる。この型取りには、樹脂ま
たは金属が用いられる。型取りに際しては、微細状粒子
２６の面に流動状態の型取り材料２８が接触するので微
細状粒子２６は、流動状態の樹脂または金属からなる型
取り材料２８に付着しにくいことが好ましく、この点か
らもコロイダルシリカが望ましい。As described above, the beads 22 are juxtaposed on the support 20, and the molding is performed with the fine particles 26 superimposed on the beads 22. Resin or metal is used for this molding. At the time of molding, since the molding material 28 in a fluid state contacts the surface of the fine particles 26, it is preferable that the fine particles 26 hardly adhere to the molding material 28 made of resin or metal in a fluid state. Colloidal silica is also desirable from the viewpoint.
【００２２】次に型取り材料２８が充分に冷却した後、
鋳型３０が取り出される。鋳型３０には、ビーズ２２の
一部および微細状粒子の一部の面にそれぞれ対応する粗
状凹凸および微細状凹凸が形成される。これらの凹凸面
が形成された面に硬化性材料が注入された後、鋳型３０
から取り出されて光拡散体としての成形体３２が得られ
る。Next, after the molding material 28 is sufficiently cooled,
The mold 30 is taken out. On the mold 30, rough and fine irregularities corresponding to a part of the surface of the beads 22 and a part of the surface of the fine particles are respectively formed. After the curable material is injected into the surface on which these uneven surfaces are formed, the mold 30
And a molded body 32 as a light diffuser is obtained.
【００２３】次に図３の（Ａ）は本発明の光拡散体の製
造方法の他の好ましい実施の形態を示す側面図、（Ｂ）
は、（Ａ）の要部斜視図である。図３において、４０は
透明性のベルトを示し、このベルト４０はドラム４２に
懸架されている。ドラム４２上には、図２に示す場合と
同様に粗状凹凸を形成するためのビーズと、微細状凹凸
を形成するための微細状粒子がそれぞれ固着され、凹凸
面４４が形成される。Next, FIG. 3A is a side view showing another preferred embodiment of the method for manufacturing a light diffuser according to the present invention, and FIG.
1 is a perspective view of a main part of FIG. In FIG. 3, reference numeral 40 denotes a transparent belt, which is suspended on a drum 42. Beads for forming coarse irregularities and fine particles for forming fine irregularities are respectively fixed on the drum 42 in the same manner as in the case shown in FIG.
【００２４】ベルト４０には、ＵＶ硬化性樹脂組成物が
塗布されてＵＶ硬化性樹脂組成物層４６が形成され、こ
の状態でＵＶ硬化性樹脂組成物層４６はドラム４２面に
押圧される。これによってＵＶ硬化性樹脂組成物層４６
の表面には前記ビーズの形状と前記微細状粒子の形状に
対応した凹凸が形成されると同時にベルト４０面にＵＶ
光が照射される。この結果、表面に凹凸が形成されたＵ
Ｖ硬化性樹脂組成物層４６が硬化し、ＵＶ硬化性樹脂組
成物層４６はドラム４２面から次第に離間する。このベ
ルト４０を必要に応じて所定の大きさに切断して光拡散
体をすることができる。A UV curable resin composition is applied to the belt 40 to form a UV curable resin composition layer 46, and the UV curable resin composition layer 46 is pressed against the drum 42 in this state. Thereby, the UV curable resin composition layer 46
On the surface of the belt, irregularities corresponding to the shape of the beads and the shape of the fine particles are formed, and at the same time, UV
Light is irradiated. As a result, U with irregularities formed on the surface
The V-curable resin composition layer 46 is cured, and the UV-curable resin composition layer 46 is gradually separated from the drum 42 surface. The belt 40 can be cut into a predetermined size as needed to form a light diffuser.
【００２５】なお、鋳型３０、ベルト４０の代わりにバ
ンドに上記したと同様な凹凸面を形成し、この面に流動
状態の材料を接触させた後硬化させ、得られた硬化物を
鋳型に用いて光拡散体を形成してもよい。ここで、硬化
性材料としては、温度変化で硬化する材料(例えば、ガ
ラス、熱硬化性樹脂、金属等)、反応で硬化する材料
（例えば、光硬化性樹脂、室温硬化性シリコーン樹脂，
縮重合性高分子、付加反応性高分子等）、その他、乾燥
で硬化する樹脂(例えば、水溶性高分子、溶剤可溶性高
分子、高分子ラテックス等）が挙げられる。In addition, instead of the mold 30 and the belt 40, a band having the same irregularities as described above is formed on a band, and a material in a fluid state is brought into contact with the surface and cured, and the obtained cured product is used as a mold. To form a light diffuser. Here, as the curable material, a material that is cured by a change in temperature (for example, glass, a thermosetting resin, a metal, or the like), a material that is cured by a reaction (for example, a photocurable resin, a room-temperature curable silicone resin,
Polycondensable polymers, addition-reactive polymers, etc.) and other resins that cure by drying (eg, water-soluble polymers, solvent-soluble polymers, polymer latex, etc.).
【００２６】上記した微細状粒子凹凸と粗状凹凸が形成
された鋳型３０あるいは微細状粒子凹凸と粗状凹凸が形
成されたドラム４２、バンドを使用すれば、硬化性材料
の制約条件は液状から固体に変化する性質のみが必須条
件であるため、材料の選択肢が広くなる。したがって、
これらの材料は、この必須の条件以外の他に要求される
性能条件を満足する可能性が高くなり、本発明の製造方
法によって生産できる製品に種々の特性を付与すること
ができる。このことは、次のような利点を有することに
なる。 １) 硬化性材料として堅い材料や強靭な材料を用いれ
ば、光拡散体に傷が付き難くなる。 ２） 硬化性材料として導電性の材料を用いれば、光拡
散体に電波が透過し難いという特性を付与することがで
きる。 ３) 硬化性材料として撥水性の材料を用いれば、光拡散
体の汚れを除去しやすいという特性を付与することがで
きる。If the above-described mold 30 having the fine particle irregularities and the rough irregularities formed thereon, or the drum 42 having the fine particle irregularities and the rough irregularities formed, and the band, are used, the restrictive condition of the curable material is from liquid. Since only the property that changes to a solid is an essential condition, the choice of materials is widened. Therefore,
These materials are more likely to satisfy required performance conditions other than the essential conditions, and can impart various properties to products that can be produced by the production method of the present invention. This has the following advantages. 1) If a hard or tough material is used as the curable material, the light diffuser is less likely to be damaged. 2) If a conductive material is used as the curable material, it is possible to impart a property that radio waves are hardly transmitted to the light diffuser. 3) If a water-repellent material is used as the curable material, it is possible to provide a property that the stain on the light diffuser is easily removed.
【００２７】表面反射率低減機能を発揮させるための微
細状凹凸は、通常、多層薄膜の光干渉によって製造さ
れ、拡散反射機能を発揮させるための粗状凹凸は、通
常、エンボス加工法による方法でそれぞれ製造されてお
り、したがって、これらの微細状凹凸および粗状凹凸の
双方を製造するためには、異なる２つの装置により製造
することが考えられる。しかし、本発明の製造方法によ
れば、微細状凹凸および粗状凹凸が同時に１回の高低で
製造されるため、従来に比較して工程数が少なくなり、
低コストの光拡散体を製造することができる。The fine irregularities for exhibiting the surface reflectance reducing function are usually produced by optical interference of a multilayer thin film, and the rough irregularities for exhibiting the diffuse reflection function are usually formed by an embossing method. Therefore, in order to manufacture both the fine irregularities and the rough irregularities, it is conceivable to produce the two different apparatuses. However, according to the manufacturing method of the present invention, the fine unevenness and the rough unevenness are simultaneously manufactured at one level, so that the number of steps is smaller than that of the related art,
A low-cost light diffuser can be manufactured.
【００２８】[0028]
【実施例】特開平６−６７００３に記載されている方法
で、１００μｍ厚のポリエステルフィルムの表面にアク
リル樹脂ビーズ(球状粒子）を固定したシートを作製し
た。このシートの凹凸表面は、敷き詰められた直径１０
ないし２０μｍのビーズ表面にバインダー樹脂が濡れ接
触して形成された波状表面形状になっている。これらの
ビーズ(球状粒子）によって得られた凹凸の平均周期(平
均空間周期）は１８μｍであり、深さ(高低差）は５．
３μｍであった。この表面に平均粒径が０．１μｍシリ
カ(微細状粒子）ゾルをＰＶＡ水溶液に分散した液をス
ピンコーターで塗布し、６０℃で１時間乾燥した。この
表面に、シリコーン型取り材(信越シリコーン社製、Ｋ
Ｅ−１３００）を約２ｍｍの厚さに塗布し、室温で２４
時間硬化させた。原型からシリコーン型をはがし、水中
にて型を洗浄し、残存シリカゲルを除去し、鋳型を完成
した。この鋳型に、変成アクリルポリマー（三菱レイヨ
ン社製、ＢＲ−７９）のトルエン溶液をキャストし，２
４時間室温で乾燥して厚さ１．５ｍｍの透明板を得た。
電子顕微鏡観察によりこの透明板には、鋳型から原型の
０．１μｍの周期の微細な表面凹凸が転写され、かつ反
射光学顕微鏡観察により１０ないし２０μｍ周期の表面
凹凸形状も転写されていることが確認できた。この表面
凹凸の表面反射は拡散性があり、映り込み像をぼかす機
能が見られた。また、拡散反射率は、可視光域で最大値
２．３％、最小値１．１％を示し、反射防止機能がある
ことも確認できた。EXAMPLE A sheet in which acrylic resin beads (spherical particles) were fixed on the surface of a polyester film having a thickness of 100 μm was prepared by the method described in JP-A-6-67003. The uneven surface of this sheet has a spread diameter of 10
It has a wavy surface shape formed by the wet contact of the binder resin with the surface of the beads having a thickness of 20 μm. The average period (average spatial period) of the irregularities obtained by these beads (spherical particles) is 18 μm, and the depth (difference in height) is 5.
It was 3 μm. A solution in which a sol of silica (fine particles) having an average particle size of 0.1 μm was dispersed in an aqueous PVA solution was applied to the surface with a spin coater, and dried at 60 ° C. for 1 hour. On this surface, a silicone mold material (Shin-Etsu Silicone Co., Ltd., K
E-1300) to a thickness of about 2 mm, and
Cured for hours. The silicone mold was peeled off from the prototype, the mold was washed in water, and the remaining silica gel was removed to complete the mold. To this mold was cast a toluene solution of a modified acrylic polymer (BR-79, manufactured by Mitsubishi Rayon Co., Ltd.).
The transparent plate having a thickness of 1.5 mm was obtained by drying at room temperature for 4 hours.
Electron microscopic observation confirmed that fine surface irregularities with a period of 0.1 μm from the mold were transferred from the mold to the transparent plate, and that surface irregularities with a period of 10 to 20 μm were also transferred by reflection optical microscopy. did it. The surface reflection of the surface irregularities was diffusive, and a function of blurring the reflected image was observed. In addition, the diffuse reflectance showed a maximum value of 2.3% and a minimum value of 1.1% in the visible light range, and it was confirmed that the film had an antireflection function.
【００２９】[0029]
【発明の効果】請求項１に記載の光拡散体によれば、表
面反射低減機能と、拡散反射機能とを有するので、光拡
散体の表面に映り込む不快感を軽減でき、かつ透過画像
がぼやけることもなく、画像の鮮鋭度を維持することが
できる。請求項３に記載の光拡散体の製造方法によれ
ば、粗状凹凸と微細状凹凸とを有する光拡散体を１回の
工程で製造でき、かつ製造に使用される材料の選択の範
囲が広がるため、光拡散体の物性の向上を図ることがで
きる。According to the first aspect of the present invention, since the light diffuser has a surface reflection reducing function and a diffuse reflection function, discomfort reflected on the surface of the light diffuser can be reduced and a transmitted image can be reduced. The sharpness of the image can be maintained without blurring. According to the method for manufacturing a light diffuser according to the third aspect, a light diffuser having rough irregularities and fine irregularities can be manufactured in one step, and the range of selection of materials used for the manufacture is limited. Since the light diffuser is expanded, the physical properties of the light diffuser can be improved.
【図１】本発明の光拡散体の一実施の形態を示す要部拡
大断面図である。FIG. 1 is an enlarged sectional view of a main part showing an embodiment of a light diffuser of the present invention.
【図２】本発明の光拡散体の製造方法の好ましい一実施
の形態を示す工程図である。FIG. 2 is a process chart showing a preferred embodiment of the method for producing a light diffuser of the present invention.
【図３】（Ａ）は本発明の光拡散体の製造方法の好まし
い他の実施の形態を示す側面図、（Ｂ）は（Ａ）の要部
斜視図である。FIG. 3A is a side view showing another preferred embodiment of the method for producing a light diffuser of the present invention, and FIG. 3B is a perspective view of a main part of FIG.
１０ 粗状凹凸 １２ 微細状凹凸 ２０ 支持体 ２２ 球状粒子 ２４ バインダー ２６ 微細状粒子 ２８ 型取り材料 ３０ モールド ３２ 光拡散体 ４０ ベルト ４２ ドラム ４４ 凹凸面 ４６ ＵＶ硬化性樹脂組成物層 DESCRIPTION OF SYMBOLS 10 Rough irregularities 12 Fine irregularities 20 Support 22 Spherical particles 24 Binder 26 Fine particles 28 Molding material 30 Mold 32 Light diffuser 40 Belt 42 Drum 44 Irregular surface 46 UV curable resin composition layer
Claims (5)
下で、かつ高低差が０．１μm以上２０μm以下の粗状凹
凸と、この粗状凹凸面上に空間周期が０．３μm以下
で、かつ高低差が０．０１μm以上の微細状凹凸と、を
有することを特徴とする光拡散体。1. A rough surface having a spatial period of 1 μm or more and 50 μm or less and a height difference of 0.1 μm or more and 20 μm or less on the surface, a spatial period of 0.3 μm or less on the rough uneven surface, and A light diffuser having fine irregularities having a height difference of 0.01 μm or more.
下で、かつ高低差が２μm以上１５μm以下の粗状凹凸
と、この粗状凹凸面上に空間周期が０．０２μm以上
０．１５μm以下で、かつ高低差が０．０２μm以上０．
１５μm以下の微細状凹凸と、を有することを特徴とす
る請求項１に記載の光拡散体。2. A method according to claim 1, wherein the surface has a rough surface having a spatial period of 2 μm or more and 40 μm or less and a height difference of 2 μm or more and 15 μm or less, and a spatial period of 0.02 μm or more and 0.15 μm or less on the rough uneven surface. And the height difference is 0.02 μm or more.
The light diffuser according to claim 1, comprising fine irregularities of 15 µm or less.
が形成され、この粒子層上に該粒子よりも径が小さい微
細粒子が重畳された面に流動状態の材料を接触させた後
硬化させ、得られた硬化物を鋳型に用いて光拡散体を製
造することを特徴とする光拡散体の製造方法。3. A particle layer in which spherical particles are juxtaposed on a support is formed, and a material in a fluid state is brought into contact with a surface on which fine particles having a smaller diameter than the particles are superimposed on the particle layer. A method for producing a light diffuser, comprising post-curing and using the obtained cured product as a mold to produce a light diffuser.
の径からなり、前記微細状粒子が０．３μm以下の径か
らなることを特徴とする請求項３に記載の光拡散体の製
造方法。4. The method according to claim 3, wherein the spherical particles have a diameter of 1 μm or more and 50 μm or less, and the fine particles have a diameter of 0.3 μm or less.
の径からなり、前記微細粒子が０．０２μm以上０．１
５μm以下の径からなることを特徴とする請求項４に記
載の光拡散体の製造方法。5. The spherical particles have a diameter of 2 μm or more and 40 μm or less, and the fine particles have a diameter of 0.02 μm or more and 0.1 μm or less.
5. The method for producing a light diffuser according to claim 4, wherein the diameter is 5 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25048499A JP2001074919A (en) | 1999-09-03 | 1999-09-03 | Light diffusing body and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25048499A JP2001074919A (en) | 1999-09-03 | 1999-09-03 | Light diffusing body and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001074919A true JP2001074919A (en) | 2001-03-23 |
Family
ID=17208554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25048499A Pending JP2001074919A (en) | 1999-09-03 | 1999-09-03 | Light diffusing body and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001074919A (en) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030065102A (en) * | 2002-01-31 | 2003-08-06 | 주식회사 송산 | Diffuse film of back light set |
| JP2004029729A (en) * | 2002-03-11 | 2004-01-29 | Eastman Kodak Co | Diffuse reflector |
| JP2004070328A (en) * | 2002-08-06 | 2004-03-04 | Eastman Kodak Co | Optical element containing interference fringe filter |
| JP2004133452A (en) * | 2002-10-07 | 2004-04-30 | Eastman Kodak Co | Optical element containing nanocomposite material |
| JP2004145329A (en) * | 2002-10-04 | 2004-05-20 | Keiwa Inc | Optical sheet and back light unit using the same |
| JP2005234554A (en) * | 2004-01-23 | 2005-09-02 | Fuji Photo Film Co Ltd | Antireflection film, polarizing plate and image display apparatus |
| US7268948B2 (en) | 2004-03-31 | 2007-09-11 | Canon Kabushiki Kaisha | Optical element and optical scanning device using the same |
| KR100806132B1 (en) | 2006-08-18 | 2008-02-22 | 신화인터텍 주식회사 | Diffuse sheet and backlight assembly and liquid crystal display comprising the same |
| JP2008216743A (en) * | 2007-03-06 | 2008-09-18 | Refuraito Kk | Method of manufacturing optical sheet for backlight unit |
| US7524428B2 (en) | 2003-02-26 | 2009-04-28 | Kabushiki Kaisha Toshiba | Display device and method of manufacturing transparent substrate for display device |
| JP2009104052A (en) * | 2007-10-25 | 2009-05-14 | Entire Technology Co Ltd | Molding frame of diffusion sheet and method for manufacturing the same |
| EP2116875A2 (en) * | 2008-05-07 | 2009-11-11 | LG Electronics Inc. | Light pipe and illuminating device having the same |
| KR100960556B1 (en) | 2008-05-27 | 2010-06-03 | 엘지전자 주식회사 | Optical sheet and Liquid Crystal Display using the same |
| US7956954B2 (en) | 2008-05-28 | 2011-06-07 | Lg Electronics Inc. | Optical sheet, backlight unit, and liquid crystal display |
| US8075167B2 (en) | 2008-05-20 | 2011-12-13 | Lg Electronics Inc. | Optical film and illuminating device having the same |
| CN101772726B (en) * | 2007-08-09 | 2012-01-11 | 夏普株式会社 | Liquid crystal display unit |
| US8133538B2 (en) | 2006-03-17 | 2012-03-13 | Canon Kabushiki Kaisha | Method of producing mold having uneven structure |
| KR101172411B1 (en) * | 2002-03-11 | 2012-08-08 | 롬 앤드 하스 덴마크 파이낸스 에이에스 | Surface formed complex polymer lenses for visible light diffusion |
| USRE43694E1 (en) | 2000-04-28 | 2012-10-02 | Sharp Kabushiki Kaisha | Stamping tool, casting mold and methods for structuring a surface of a work piece |
| US8310623B2 (en) | 2008-05-27 | 2012-11-13 | Lg Electronics Inc. | Optical sheet and liquid crystal display including the same |
| JP2013073239A (en) * | 2011-09-27 | 2013-04-22 | Skc Haas Display Films Co Ltd | Method for manufacturing high brightness optical sheet |
| US8789992B2 (en) | 2008-05-08 | 2014-07-29 | Lg Electronics Inc. | Light pipe and illuminating device having the same |
| US9036261B2 (en) | 2012-09-11 | 2015-05-19 | Ricoh Company, Ltd. | Optical element, light diffusing element, and image display apparatus |
| US9417362B2 (en) | 2010-12-31 | 2016-08-16 | Samsung Electronics Co., Ltd. | Reflective structure and display apparatus employing the same |
| JP2019142201A (en) * | 2018-02-23 | 2019-08-29 | 大日本印刷株式会社 | Forming sheet and manufacturing method of forming sheet |
-
1999
- 1999-09-03 JP JP25048499A patent/JP2001074919A/en active Pending
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE46606E1 (en) | 2000-04-28 | 2017-11-14 | Sharp Kabushiki Kaisha | Stamping tool, casting mold and methods for structuring a surface of a work piece |
| USRE43694E1 (en) | 2000-04-28 | 2012-10-02 | Sharp Kabushiki Kaisha | Stamping tool, casting mold and methods for structuring a surface of a work piece |
| USRE44830E1 (en) | 2000-04-28 | 2014-04-08 | Sharp Kabushiki Kaisha | Stamping tool, casting mold and methods for structuring a surface of a work piece |
| KR20030065102A (en) * | 2002-01-31 | 2003-08-06 | 주식회사 송산 | Diffuse film of back light set |
| JP2004029729A (en) * | 2002-03-11 | 2004-01-29 | Eastman Kodak Co | Diffuse reflector |
| KR101172411B1 (en) * | 2002-03-11 | 2012-08-08 | 롬 앤드 하스 덴마크 파이낸스 에이에스 | Surface formed complex polymer lenses for visible light diffusion |
| JP4544502B2 (en) * | 2002-03-11 | 2010-09-15 | ローム アンド ハース デンマーク ファイナンス エーエス | Diffuse reflector |
| JP2004070328A (en) * | 2002-08-06 | 2004-03-04 | Eastman Kodak Co | Optical element containing interference fringe filter |
| JP2004145329A (en) * | 2002-10-04 | 2004-05-20 | Keiwa Inc | Optical sheet and back light unit using the same |
| JP4590177B2 (en) * | 2002-10-07 | 2010-12-01 | ローム アンド ハース デンマーク ファイナンス エーエス | Optical element comprising nanocomposite material |
| JP2004133452A (en) * | 2002-10-07 | 2004-04-30 | Eastman Kodak Co | Optical element containing nanocomposite material |
| US7524428B2 (en) | 2003-02-26 | 2009-04-28 | Kabushiki Kaisha Toshiba | Display device and method of manufacturing transparent substrate for display device |
| US8395305B2 (en) | 2003-02-26 | 2013-03-12 | Kabushiki Kaisha Toshiba | Display device and method of manufacturing transparent substrate for display device |
| JP2005234554A (en) * | 2004-01-23 | 2005-09-02 | Fuji Photo Film Co Ltd | Antireflection film, polarizing plate and image display apparatus |
| US7268948B2 (en) | 2004-03-31 | 2007-09-11 | Canon Kabushiki Kaisha | Optical element and optical scanning device using the same |
| US8133538B2 (en) | 2006-03-17 | 2012-03-13 | Canon Kabushiki Kaisha | Method of producing mold having uneven structure |
| KR100806132B1 (en) | 2006-08-18 | 2008-02-22 | 신화인터텍 주식회사 | Diffuse sheet and backlight assembly and liquid crystal display comprising the same |
| JP2008216743A (en) * | 2007-03-06 | 2008-09-18 | Refuraito Kk | Method of manufacturing optical sheet for backlight unit |
| US8405804B2 (en) | 2007-08-09 | 2013-03-26 | Sharp Kabushiki Kaisha | Liquid crystal display unit |
| CN101772726B (en) * | 2007-08-09 | 2012-01-11 | 夏普株式会社 | Liquid crystal display unit |
| JP2009104052A (en) * | 2007-10-25 | 2009-05-14 | Entire Technology Co Ltd | Molding frame of diffusion sheet and method for manufacturing the same |
| US8057073B2 (en) | 2008-05-07 | 2011-11-15 | Lg Electronics Inc. | Light pipe and illuminating device having the same |
| EP2116875A2 (en) * | 2008-05-07 | 2009-11-11 | LG Electronics Inc. | Light pipe and illuminating device having the same |
| US8789992B2 (en) | 2008-05-08 | 2014-07-29 | Lg Electronics Inc. | Light pipe and illuminating device having the same |
| US8075167B2 (en) | 2008-05-20 | 2011-12-13 | Lg Electronics Inc. | Optical film and illuminating device having the same |
| US8310623B2 (en) | 2008-05-27 | 2012-11-13 | Lg Electronics Inc. | Optical sheet and liquid crystal display including the same |
| KR100960556B1 (en) | 2008-05-27 | 2010-06-03 | 엘지전자 주식회사 | Optical sheet and Liquid Crystal Display using the same |
| US7956954B2 (en) | 2008-05-28 | 2011-06-07 | Lg Electronics Inc. | Optical sheet, backlight unit, and liquid crystal display |
| US9417362B2 (en) | 2010-12-31 | 2016-08-16 | Samsung Electronics Co., Ltd. | Reflective structure and display apparatus employing the same |
| JP2013073239A (en) * | 2011-09-27 | 2013-04-22 | Skc Haas Display Films Co Ltd | Method for manufacturing high brightness optical sheet |
| US9036261B2 (en) | 2012-09-11 | 2015-05-19 | Ricoh Company, Ltd. | Optical element, light diffusing element, and image display apparatus |
| JP2019142201A (en) * | 2018-02-23 | 2019-08-29 | 大日本印刷株式会社 | Forming sheet and manufacturing method of forming sheet |
| JP7043883B2 (en) | 2018-02-23 | 2022-03-30 | 大日本印刷株式会社 | Molding sheet and manufacturing method of molding sheet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2001074919A (en) | Light diffusing body and its production | |
| JP2742880B2 (en) | Surface light source, display device using the same, and light diffusion sheet used for them | |
| KR101476462B1 (en) | Method for manufacturing optical laminate, optical laminate, polarizing plate, and image display apparatus | |
| KR100932825B1 (en) | Method for producing anti-glare film, anti-glare film, anti-glare polarizer, display device and optical film | |
| KR20180063259A (en) | OPTICAL SHEET, POLARIZING PLATE, SELECTION METHOD FOR OPTICAL SHEET, AND PROCESS FOR PRODUCING OPTICAL SHEET | |
| JP2001517319A (en) | Anti-reflection coating and its manufacturing method | |
| JP2003004916A (en) | Window material of display device, method of manufacturing for the same and display device | |
| JP2002196117A (en) | Light diffusion layer, light diffusing sheet and optical element | |
| JP2008090212A (en) | Antireflection optical structure, antireflection optical structure body and its manufacturing method | |
| JPH07290652A (en) | Reflection preventing film having excellent optical characteristics and production thereof | |
| JP2002267815A (en) | Reflection preventive molded part and method for manufacturing the same | |
| JP2003050673A (en) | Transparent touch panel with reflection preventing function and display device using the same | |
| JP3341225B2 (en) | Reflective projection screen | |
| JP2004069878A (en) | Anti-dazzle and anti-reflective member and optical member | |
| EP2181347A1 (en) | Light diffusion film having good uniformity of surface roughness and method for manufacturing the same | |
| JP2003205564A (en) | Electrification preventing transfer foil with reflection preventing function | |
| JP3154981B2 (en) | Manufacturing method of light diffusion sheet | |
| KR20140079220A (en) | Anti-glare firm and method for manufacturing the same | |
| JP5603541B2 (en) | Prism sheet | |
| JP2004322566A (en) | Forming sheet and its manufacturing method | |
| JP4612204B2 (en) | Lens sheet and display device having the same | |
| CN215340682U (en) | Transparent projection film curtain and ultra-short-focus projection system using same | |
| JP3808645B2 (en) | Light control member manufacturing mold and light control member manufacturing method | |
| JP2008065298A (en) | Antiglare film, its manufacturing method and polarizing plate for display | |
| JP2005195820A (en) | Glareproof film |