JPH10133002A - Antireflection film, production of this antireflection film and display device using this antireflection film - Google Patents
Antireflection film, production of this antireflection film and display device using this antireflection filmInfo
- Publication number
- JPH10133002A JPH10133002A JP28879196A JP28879196A JPH10133002A JP H10133002 A JPH10133002 A JP H10133002A JP 28879196 A JP28879196 A JP 28879196A JP 28879196 A JP28879196 A JP 28879196A JP H10133002 A JPH10133002 A JP H10133002A
- Authority
- JP
- Japan
- Prior art keywords
- antireflection film
- fine particles
- sol
- display device
- antireflection
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/006—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels to produce glass through wet route
- C03C1/008—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels to produce glass through wet route for the production of films or coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
- C03C17/007—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/425—Coatings comprising at least one inhomogeneous layer consisting of a porous layer
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/73—Anti-reflective coatings with specific characteristics
- C03C2217/732—Anti-reflective coatings with specific characteristics made of a single layer
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、反射防止膜、該反
射防止膜の製造方法及び該反射防止膜を用いた表示装置
に関し、特にアンチグレアタイプであると共に、アンチ
リフレクション効果をも有する反射防止膜、該反射防止
膜の製造方法及び該反射防止膜を用いた表示装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-reflection film, a method for manufacturing the anti-reflection film, and a display device using the anti-reflection film, and more particularly to an anti-glare type anti-reflection film having an anti-reflection effect. The present invention relates to a method for manufacturing the antireflection film and a display device using the antireflection film.
【０００２】[0002]
【従来の技術】従来より、照明器具等の外光の反射光を
散乱させるアンチグレアタイプ（ＡＧタイプ）の反射防
止膜については、表示装置への応用も含めて種々提案さ
れている（例えば、特開昭５０−９６１２８号公報、特
開昭５５−１１２１０７号公報、特開昭５９−１１６６
０１号公報等）。2. Description of the Related Art Hitherto, various anti-glare type (AG type) antireflection films for scattering reflected light of external light from lighting equipment and the like have been proposed, including applications to display devices (for example, see Japanese Patent Application Laid-Open No. H11-157556). JP-A-50-96128, JP-A-55-112107, JP-A-59-1166
No. 01 publication).
【０００３】このようなアンチグレアタイプの反射防止
膜のアンチグレア面は、一般的にはシリカ粒子を塗料等
のバインダーに分散させ、それをコーティングすること
により形成されている。また、砥粒吹き付けやエッチン
グ等により、基板表面を荒らすことによってアンチグレ
ア面を形成することも行われている。The anti-glare surface of such an anti-glare type anti-reflection film is generally formed by dispersing silica particles in a binder such as a paint and coating the binder. Also, an anti-glare surface is formed by roughening the substrate surface by spraying abrasive grains, etching, or the like.
【０００４】また、アンチリフレクションタイプの反射
防止膜としては光学多層膜が一般的であるが、これ以外
では多孔質反射防止膜が知られている。多孔質反射防止
膜は、微細（光の波長以下）な気孔の形成により膜の屈
折率を１．２〜１．３程度に低下させて、反射防止効果
を得るものであり、すでに種々提案されている。As an anti-reflection type anti-reflection film, an optical multilayer film is generally used, but other than this, a porous anti-reflection film is known. The porous anti-reflection film is to obtain an anti-reflection effect by reducing the refractive index of the film to about 1.2 to 1.3 by forming fine pores (less than the wavelength of light), and various proposals have been made. ing.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、表示装
置の表面上に、上述したようなアンチグレアタイプの反
射防止膜が形成されている場合、アンチグレア面の散乱
効果（ＡＧ効果）によって室内照明（蛍光灯等）等の外
光の映り込み像が無くなって視認性は向上するものの、
依然、反射光の全光束は非アンチグレア面のそれとほと
んど変わらず、その反射光により表示装置の表面のコン
トラストが低下することによって、防眩性が不十分とな
る問題があった。However, when the above-described anti-glare type anti-reflection film is formed on the surface of the display device, indoor lighting (fluorescent lamp) is caused by the scattering effect (AG effect) of the anti-glare surface. Etc.), but the visibility is improved by eliminating the reflected image of external light,
Still, the total luminous flux of the reflected light is almost the same as that of the non-anti-glare surface, and the reflected light lowers the contrast of the surface of the display device, resulting in insufficient glare.
【０００６】また、アンチリフレクションタイプ（ＡＲ
タイプ）の反射防止膜が形成されている場合には、反射
率そのものが低いため、上述したようなコントラスト低
下はなく良好な表示像が得られるが、外光、例えば蛍光
灯等の紫色の映り込み像がそのまま反射像として見えて
しまうとう問題があった。Further, an anti-reflection type (AR
When the (type) antireflection film is formed, since the reflectance itself is low, a good display image can be obtained without the above-described decrease in contrast, but external light, for example, a violet reflection of a fluorescent lamp or the like can be obtained. There is a problem that the embedded image is seen as a reflected image as it is.
【０００７】そこで、理想的にはアンチグレアタイプと
アンチリフレクションタイプの両方の反射防止膜を重ね
て用いればよいが、その場合には製造プロセスが増える
と共に、コストも大幅に増大してしまうという問題があ
った。Therefore, ideally, both anti-glare type and anti-reflection type anti-reflection coatings may be used in layers, but in this case, the manufacturing process is increased and the cost is greatly increased. there were.
【０００８】そこで本発明は、アンチグレア効果とアン
チリフレクション効果とを有し、良好な防眩効果を与え
ると共に製造プロセスも簡単である反射防止膜と、その
製造方法を提供することを目的とする。Accordingly, an object of the present invention is to provide an antireflection film having an antiglare effect and an antireflection effect, giving a good antiglare effect, and having a simple manufacturing process, and a method for manufacturing the same.
【０００９】さらに、本発明は、このようなアンチグレ
ア効果とアンチリフレクション効果とを有する反射防止
膜を、その表面またはその前方側に存在する種々の部材
（光学部材など）のエアー界面に設けることにより防眩
性に優れた表示装置を提供することを目的とする。Further, the present invention provides an anti-reflection film having such an anti-glare effect and an anti-reflection effect on the air interface of various members (such as optical members) existing on the surface thereof or on the front side thereof. An object is to provide a display device having excellent anti-glare properties.
【００１０】[0010]
【課題を解決するための手段】本発明は、上述事情に鑑
みなされたものであって、本発明は、微粒子をゾルゲル
法による調整後のゾル液に混合し、それを基板上にコー
ティング、焼成することにより形成された反射防止膜に
おいて、前記ゾル液の平均分子量をポリスチレン換算で
３０００〜３００００に調整したことを特徴としてい
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and the present invention provides a method of mixing fine particles with a sol solution prepared by a sol-gel method, coating the fine particles on a substrate, and firing the mixture. In the anti-reflection film formed by the above, the average molecular weight of the sol liquid is adjusted to 3000 to 30,000 in terms of polystyrene.
【００１１】また、本発明は、微粒子をゾルゲル法によ
る調整後のゾル液に混合し、それを基板上にコーティン
グ、焼成することにより形成される反射防止膜の製造方
法において、前記ゾル液の平均分子量がポリスチレン換
算で３０００〜３００００になるように調整した後に、
前記微粒子を混合することを特徴としている。The present invention also provides a method for producing an antireflection film formed by mixing fine particles with a sol liquid prepared by a sol-gel method, coating the mixture on a substrate, and baking the mixture. After adjusting the molecular weight to be 3000 to 30000 in terms of polystyrene,
It is characterized in that the fine particles are mixed.
【００１２】また、本発明に係る表示装置は、情報が表
示される表示ユニットの表面、あるいは該表面の前方側
に配置される部材の少なくとも１つのエアー界面に、請
求項１乃至１０のいずれか１項記載の反射防止膜を有す
ることを特徴としている。Further, according to the display device of the present invention, at least one air interface of a surface of the display unit on which information is displayed or a member disposed in front of the surface is provided. 3. An anti-reflection film according to claim 1.
【００１３】[0013]
【発明の実施の形態】以下、図面に基づいて本発明に係
る実施の形態について説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】図１は、本発明の実施の形態に係る反射防
止膜の構造を示す拡大断面図である。この反射防止膜１
は、多数のシリカ粒子２と、ゾンゲル法によるシリカガ
ラスバインダー３とを有しており、透明なガラス基板４
上に形成されている。FIG. 1 is an enlarged sectional view showing the structure of an antireflection film according to an embodiment of the present invention. This antireflection film 1
Has a large number of silica particles 2 and a silica glass binder 3 formed by a sol-gel method.
Is formed on.
【００１５】多数のシリカ粒子２はマクロ的な構造とし
てはランダムに凝集しており、これらのシリカ粒子２は
シリカガラスバインダー３をバインダーとして互いに連
結し、さらにガラス基板４上に密着することにより、ガ
ラス基板４の表面上に２次元的に広がったシリカ粒子２
よりも大きな凹凸形状が形成されている。また、ミクロ
的な構造としては、各シリカ粒子２はシリカガラスバイ
ンダー３により不規則、かつ３次元マトリックス的に連
結しており、多くの微細な気泡５や気孔６が形成される
ことによって（好ましくは単位体積当たり体積比較で、
２０〜８０％気泡や気孔が形成され）、多孔質化されて
いる。A large number of silica particles 2 are randomly aggregated as a macroscopic structure. These silica particles 2 are connected to each other using a silica glass binder 3 as a binder, and further adhere to the glass substrate 4 to form Silica particles 2 spread two-dimensionally on the surface of glass substrate 4
A larger uneven shape is formed. As for the microscopic structure, each silica particle 2 is connected irregularly and in a three-dimensional matrix by a silica glass binder 3, and many fine bubbles 5 and pores 6 are formed. Is volume comparison per unit volume,
20 to 80% of bubbles and pores are formed), and the porous body is formed.
【００１６】なお、上述した“ランダムに凝集”とは粒
子が集合した不規則な形状の大きさで凝集体を形成して
いる状態であり、本発明において、形成された凝集体
（シリカ粒子２）は、好ましくは粒子数にして約１５０
〜３００個分が集合した状態にある。また、凝集体自体
の大きさは、その径（最大長さの部分として）が凝集体
を構成する粒子の平均粒径の約１０倍以上、好ましくは
１００倍以上の程度となる。さらに、“ランダム”の程
度は、好ましくは凝集体のサイズ分布の標準偏差（σ）
値が、その平均値の３０％以上程度となる状態である。The "random agglomeration" described above is a state in which particles are aggregated to form an irregularly shaped aggregate, and in the present invention, the formed aggregate (silica particles 2) ) Is preferably about 150 particles
In a state where ~ 300 pieces are gathered. The size of the aggregate itself (as a part of the maximum length) is about 10 times or more, preferably 100 times or more the average particle diameter of the particles constituting the aggregate. Furthermore, the degree of “randomness” is preferably determined by the standard deviation (σ) of the size distribution of the aggregates.
The value is about 30% or more of the average value.
【００１７】この反射防止膜１は、基本的にはゾルゲ
ル、即ちゾル物質をある程度ゲル化したものを成膜する
成膜プロセスを用いて製造され、調整後（ゲル化の調整
後）のゾル液にシリカ粒子２を混合し、その混合液をガ
ラス基板４上にスピンコート法によりコーティングして
焼成することによって形成される（詳細は後述する）。
前記ゾル液は、その平均分子（Ｇｅｌ Ｐｅｒｍｅａｔ
ｉｏｎ Ｃｈｒｏｍａｔｏｇｒａｐｈｙによるポリスチ
レン換算値）が３０００〜３００００、好ましくは３０
００〜１００００になるように調整される。The antireflection film 1 is basically manufactured by using a film forming process for forming a sol-gel, that is, a material obtained by gelling a sol substance to some extent, and a sol solution after adjustment (after adjustment of gelation). The mixture is formed by mixing silica particles 2 into a mixture, coating the mixture on a glass substrate 4 by a spin coating method, and firing the mixture (details will be described later).
The sol liquid has an average molecule (Gel Permeat).
polystyrene equivalent value by ion Chromatography) is 3,000 to 30,000, preferably 30
It is adjusted to be 00 to 10000.
【００１８】また、かかる反射防止膜１の膜厚は、好ま
しくは１００〜２００ｎｍ、その平均値としては０．１
〜０．３μｍ、また、シリカ粒子２の粒径は、好ましく
は５０〜１００ｎｍ、シリカ粒子２の混入率は、好まし
くは１／３〜２／３に設定される。The thickness of the antireflection film 1 is preferably 100 to 200 nm, and its average value is 0.1.
The particle size of the silica particles 2 is preferably set to 50 to 100 nm, and the mixing ratio of the silica particles 2 is preferably set to 1/3 to 2/3.
【００１９】次に、上述した反射防止膜１の具体的な製
造方法の一例を工程順に説明する。 〔１〕 まず、テトラエトキシシラン（例えば、信越化
学工業（株）製、ＫＢＥ−０４）６０ｇとエタノール３
０ｇの混合液を窒素置換（微量でよい）しながら攪拌し
た後に、３５％塩酸４．２８ｍｌを純水７．０８ｍｌで
希釈した塩酸水溶液を滴下し、その後この混合液を６０
℃に調整して２４時間反応させる。Next, an example of a specific method for manufacturing the above-described antireflection film 1 will be described in the order of steps. [1] First, 60 g of tetraethoxysilane (for example, KBE-04 manufactured by Shin-Etsu Chemical Co., Ltd.) and ethanol 3
After stirring 0 g of the mixed solution while purging with nitrogen (a trace amount may be used), an aqueous hydrochloric acid solution obtained by diluting 4.28 ml of 35% hydrochloric acid with 7.08 ml of pure water was added dropwise, and then the mixed solution was added to 60%.
C. and adjust for 24 hours.
【００２０】〔２〕 次に、ＧＰＣ（Ｇｅｌ Ｐｅｒｍ
ｅａｔｉｏｎ Ｃｈｒｏｍａｔｏｇｒａｐｈｙ）にて、
前記〔１〕の工程で得られた反応液であるゾル液の分子
量の確認を行い、ポリスチレン換算値で平均分子量が３
０００〜３００００であることを確認する。この時、前
記ゾル液の平均分子量が３０００以下であった場合に
は、前記〔１〕の工程で再び６０℃にして適宜反応さ
せ、再度同様に分子量を確認する。[2] Next, GPC (Gel Perm)
Eation Chromatography)
The molecular weight of the sol solution as the reaction solution obtained in the step [1] was confirmed, and the average molecular weight was 3 in terms of polystyrene.
Check that it is between 000 and 30,000. At this time, if the average molecular weight of the sol liquid is 3000 or less, the temperature is again raised to 60 ° C. in the step [1], and the reaction is appropriately performed, and the molecular weight is confirmed again in the same manner.
【００２１】〔３〕 次に、前記ゾル液に前記窒素置換
にて蒸発した分のエタノール３０ｇを補充して重量調整
し、さらにエチルセルソルブを適量（〜３００ｇ）加え
て前記〔１〕の工程の反応にて生成した固形分（シリ
カ）がＳｉＯ2 換算で４．４ｗｔ％になるように調整す
る。この固形分比率の確認は、るつぼにこの工程で得ら
れた調整液０．５ｇを取り、１８０℃で１５分間加熱
し、さらに３４０℃で６０分間加熱した後、残量率を精
秤して求める。[3] Next, the sol solution is replenished with 30 g of ethanol evaporated by the nitrogen replacement to adjust the weight, and an appropriate amount (up to 300 g) of ethyl cellosolve is added. Is adjusted so that the solid content (silica) generated in the reaction of ( 2 ) is 4.4 wt% in terms of SiO 2 . This solid content ratio was confirmed by taking 0.5 g of the adjusted liquid obtained in this step in a crucible, heating at 180 ° C. for 15 minutes, and further heating at 340 ° C. for 60 minutes, and then accurately weighing the remaining amount ratio. Ask.
【００２２】〔４〕 次に、前記〔３〕の工程で得られ
た調整液をメンブランフィルター（３μｍと０．２μｍ
の２枚重ね）にて加圧濾過（２ｋｇ／ｃｍ2 ）し、調整
ゾル液を生成する。[4] Next, the adjusted solution obtained in the above step [3] is passed through a membrane filter (3 μm and 0.2 μm
Under pressure (2 kg / cm 2 ) to produce an adjusted sol solution.
【００２３】〔５〕 次に、シリカ分散液（例えば、日
産化学工業（株）製、商品名：オルガノシリカゾルＥＧ
−ＳＴ−ＺＬ（分散媒：エチレングリコル、粒径：７０
〜１００ｎｍ））１００ｇに対して酢酸０．１６ｇを加
え、これをホモシナイザーにて１５０００ｒｐｍで５分
間、攪拌して分散し、調整シリカ液を生成する。[5] Next, a silica dispersion (for example, manufactured by Nissan Chemical Industries, Ltd., trade name: organosilica sol EG)
-ST-ZL (dispersion medium: ethylene glycol, particle size: 70
0.16 g of acetic acid is added to 100 g, and the mixture is dispersed by stirring with a homogenizer at 15000 rpm for 5 minutes to produce an adjusted silica liquid.
【００２４】〔６〕 次に、前記〔４〕，〔５〕の工程
で得られた調整ゾル液と調整シリカ液を２：１の比率で
混合し、この混合液をガラス基板上に、５００ｒｐｍで
１０秒間、更に１０００ｒｐｍで２０秒間の条件（この
時の条件は、３６０ｍｍ×３００ｍｍサイズのガラス基
板の場合である）でスピンコートした後、１８０℃にて
１５分間焼成し、さらに２００℃にて６０分間焼成する
ことにより、図１に示したように、シリカガラスバイン
ダー３をバインダーとしてシリカ粒子２が互いに連結さ
れている反射防止膜１を得た。前記スピンコート条件
は、ガラス基板サイズにより適宜調整する。また、反射
防止膜１の膜厚はスピン条件により所定の厚さに設定さ
れる。[6] Next, the adjusted sol liquid and the adjusted silica liquid obtained in the above steps [4] and [5] are mixed at a ratio of 2: 1 and the mixed liquid is placed on a glass substrate at 500 rpm. For 10 seconds and further for 20 seconds at 1000 rpm (the conditions here are for a glass substrate having a size of 360 mm × 300 mm), followed by baking at 180 ° C. for 15 minutes and further at 200 ° C. By baking for 60 minutes, as shown in FIG. 1, an antireflection film 1 in which silica particles 2 were connected to each other using a silica glass binder 3 as a binder was obtained. The spin coating conditions are appropriately adjusted according to the size of the glass substrate. Further, the thickness of the antireflection film 1 is set to a predetermined thickness according to spin conditions.
【００２５】このようにして作製された反射防止膜１
は、図１に示したような断面構造をなしていた。この反
射防止膜１において、特にシリカ粒子２の凝集によるマ
クロ的な表面の凹凸形状の大きさは、前記〔２〕の工程
で確認するゾル液の平均分子量に影響されることが分か
っており、前記〔１〕の工程の反応条件を変えて前記分
子量を大きくするほど、表面のマクロ的凹凸は大きくな
る。The antireflection film 1 thus manufactured
Had a sectional structure as shown in FIG. In the antireflection film 1, it is known that the size of the macroscopic surface irregularities due to the aggregation of the silica particles 2 is particularly affected by the average molecular weight of the sol liquid confirmed in the step [2]. As the molecular weight is increased by changing the reaction conditions in the step [1], the macroscopic unevenness on the surface increases.
【００２６】上述した工程により作製された反射防止膜
１において、前記ゾル液の平均分子量は３０００〜３６
００であり、表面のマクロ的凹凸の平均ピッチは５〜１
５μｍ、平均粗さは０．１〜０．３μｍ程度であった。In the antireflection film 1 manufactured by the above-described steps, the average molecular weight of the sol liquid is 3000 to 36.
00, and the average pitch of the macroscopic irregularities on the surface is 5-1.
The average roughness was about 0.1 to 0.3 μm.
【００２７】また、この反射防止膜１のミクロ的な構造
としては、ＳＥＭで確認したところ、上述したように内
部に微細な気泡５や気孔６が多く存在していた。これら
の気泡５や気孔６の大きさは１μｍ以下（可視光線の波
長オーダー以下）のものが大部分であり、非常に微細な
多孔質構造を形成していた。The microstructure of the antireflection film 1 was confirmed by SEM, and as described above, many fine bubbles 5 and pores 6 were present therein. Most of these bubbles 5 and pores 6 have a size of 1 μm or less (less than or equal to the wavelength of visible light), forming a very fine porous structure.
【００２８】ここで、この反射防止膜１に、図１に示す
ように室内照明（蛍光灯等）などからの光線Ａを入射さ
せた場合、上述した表面のマクロ的な凹凸によって、そ
の反射光Ｂは散乱されたもとなり、良好なアンチグレア
効果（ＡＧ効果）が得られた。Here, as shown in FIG. 1, when a light beam A from room lighting (such as a fluorescent lamp) is incident on the anti-reflection film 1, the reflected light is generated by the above-mentioned macroscopic unevenness on the surface. B was scattered, and a good anti-glare effect (AG effect) was obtained.
【００２９】ところで、前記ゾル液の平均分子量とアン
チグレア効果との関係を調べたところ、前記ゾル液の平
均分子量がポリスチレン換算値で３０００〜３００００
の条件が好ましいことが、本発明者らの実験で分かっ
た。すなわち、ゾル液の平均分子量が３０００以下では
前記表面のマクロ的な凹凸の大きさが小さくなって、ア
ンチグレア効果が不十分となり、ゾル液の平均分子量が
３００００以上では前記表面のマクロ的な凹凸の大きさ
が大きくなりすぎて、ぎらつきが発生する。By examining the relationship between the average molecular weight of the sol and the anti-glare effect, the average molecular weight of the sol was found to be 3,000 to 30,000 in terms of polystyrene.
It has been found by experiments of the present inventors that the condition (1) is preferable. That is, when the average molecular weight of the sol is 3000 or less, the size of the macroscopic irregularities on the surface is reduced, and the anti-glare effect becomes insufficient. When the average molecular weight of the sol is 30000 or more, the macroscopic irregularities on the surface are reduced. The size becomes too large, causing glare.
【００３０】また、反射防止膜１を光学材料的に見る
と、この反射防止膜１は微細な多孔質構造に形成されて
いるので、反射防止膜１自体の屈折率は、シリカ粒子２
やシリカガラスバインダー３の屈折率（１．５以下）よ
りも小さく（１．２〜１．４程度）なっていると考えら
れる。そのために、この反射防止膜１とエアーとの屈折
率差が減少し、光のフレネル反射係数自体が小さくなっ
ていると考えられ、良好なアンチリフレクション効果
（ＡＲ効果）も得られることが確認できた。そして、こ
の反射防止膜１は前記アンチグレア効果と相俟って優れ
た防眩効果を示した。When the antireflection film 1 is viewed as an optical material, the antireflection film 1 is formed in a fine porous structure.
It is considered that the refractive index is smaller (about 1.2 to 1.4) than the refractive index of the silica glass binder 3 (1.5 or less). Therefore, it is considered that the difference in the refractive index between the antireflection film 1 and the air is reduced, and the Fresnel reflection coefficient itself of light is considered to be small, and it can be confirmed that a good antireflection effect (AR effect) can be obtained. Was. The antireflection film 1 exhibited an excellent antiglare effect in combination with the antiglare effect.
【００３１】このように、本発明に係る反射防止膜１
は、その構成が単層構造であるため、その製造工程も非
常にシンプルであるにもかかわらず、良好なアンチグレ
ア効果（ＡＧ効果）とアンチリフレクション効果（ＡＲ
効果）とを同時に得ることができるので、優れた反射防
止作用を得ることができる。As described above, the antireflection film 1 according to the present invention
Has a good anti-glare effect (AG effect) and an excellent anti-reflection effect (AR) despite its simple manufacturing process because of its single-layer structure.
Effect) can be obtained at the same time, so that an excellent antireflection action can be obtained.
【００３２】図２は、上述した反射防止膜１を用いた表
示装置の一例を示す概略断面図である。FIG. 2 is a schematic sectional view showing an example of a display device using the above-described antireflection film 1.
【００３３】この表示装置１０はペン入力タブレット付
きの液晶表示装置であり、液晶表示パネル１１、バック
ライト１２、ガラス製のタブレット板１３、超音波発生
ペン１４とを有し、液晶表示パネル１１、バックライト
１２、タブレット板１３はハウジング１５内に取り付け
られている。タブレット板１３の両表面には、上述した
本発明に係る反射防止膜１が形成されている。The display device 10 is a liquid crystal display device with a pen input tablet, and has a liquid crystal display panel 11, a backlight 12, a glass tablet plate 13, and an ultrasonic wave generating pen 14. The backlight 12 and the tablet plate 13 are mounted in a housing 15. The antireflection film 1 according to the present invention described above is formed on both surfaces of the tablet plate 13.
【００３４】このように、この表示装置１０は、超音波
発生ペン１４によりペン入力されるタブレット板１３の
表面に上述した反射防止膜１を形成したことにより、タ
ブレット板１３に室内照明（蛍光灯等）などからの光線
Ａが入射しても、タブレット板１３のエアー界面でのそ
の反射光Ｂは、反射防止膜１の上述したアンチグレア効
果（ＡＧ効果）とアンチリフレクション効果（ＡＲ効
果）により大幅に低減される。そのため、タブレット板
１３が液晶表示パネル１１の前面に存在しているにもか
かわらず、優れた防眩性と視認性を得ることができる。As described above, the display device 10 has the above-described antireflection film 1 formed on the surface of the tablet plate 13 to which a pen is input by the ultrasonic wave generating pen 14, so that the tablet plate 13 is provided with room lighting (fluorescent lamp). Etc.), the reflected light B at the air interface of the tablet plate 13 is significantly increased by the anti-glare effect (AG effect) and the anti-reflection effect (AR effect) of the antireflection film 1 described above. To be reduced. Therefore, excellent antiglare property and visibility can be obtained even though the tablet plate 13 exists on the front surface of the liquid crystal display panel 11.
【００３５】なお、図２に示した表示装置１０では、反
射防止膜１をタブレット板１３に設けた例であったが、
タブレット板等を有さない通常の液晶表示装置において
は、液晶パネルの前面に設けられる保護ガラス板または
カバーガラス板等の両面に上述した本発明に係る反射防
止膜を形成することにより、同様に防眩性と視認性の向
上を図ることができる。Although the display device 10 shown in FIG. 2 is an example in which the antireflection film 1 is provided on the tablet 13,
In a normal liquid crystal display device having no tablet plate or the like, the above-described anti-reflection film according to the present invention is formed on both sides of a protective glass plate or a cover glass plate provided on the front surface of the liquid crystal panel. Antiglare property and visibility can be improved.
【００３６】図３は、上述した反射防止膜１を用いたＣ
ＲＴを有する表示装置の概略断面図である。FIG. 3 shows the C using the anti-reflection film 1 described above.
FIG. 3 is a schematic sectional view of a display device having an RT.
【００３７】この表示装置２０は、ハウジング２１内に
情報を表示するＣＲＴ２２が設置されており、ＣＲＴ２
２の表面上には上述した本発明に係る反射防止膜１が形
成されている。In the display device 20, a CRT 22 for displaying information is installed in a housing 21.
The antireflection film 1 according to the present invention described above is formed on the surface of the substrate 2.
【００３８】このように、この表示装置２０は、ＣＲＴ
２２の表面上に上述した反射防止膜１を形成したことに
より、ＣＲＴ２２の表面上に室内照明（蛍光灯等）など
からの光線Ａが入射しても、ＣＲＴ２２のエアー界面で
のその反射光Ｂは、反射防止膜１の上述したアンチグレ
ア効果（ＡＧ効果）とアンチリフレクション効果（ＡＲ
効果）により大幅に低減される。したがって、ＣＲＴ２
２を有する表示装置２０においても、優れた防眩性と視
認性を得ることができる。As described above, the display device 20 uses the CRT
By forming the above-described anti-reflection film 1 on the surface of the CRT 22, even if a light beam A from room lighting (such as a fluorescent lamp) is incident on the surface of the CRT 22, the reflected light B at the air interface of the CRT 22 Are the anti-glare effect (AG effect) and the anti-reflection effect (AR
Effect). Therefore, CRT2
2, the display device 20 having excellent anti-glare properties and visibility can be obtained.
【００３９】また、図３に示した表示装置２０では、Ｃ
ＲＴ２２の表面上に上述した反射防止膜１を形成した
が、透明板状部材の両面に上述した反射防止膜１を形成
して、これを別体の防眩フィルターとして表示装置の前
面に配置するようにしてもよい。In the display device 20 shown in FIG.
Although the above-described anti-reflection film 1 is formed on the surface of the RT 22, the above-described anti-reflection film 1 is formed on both surfaces of the transparent plate member, and this is disposed on the front surface of the display device as a separate anti-glare filter. You may do so.
【００４０】さらに、本発明に係る反射防止膜は、上述
した表示装置以外にも、プラズマディスプレイやその他
のあらゆるタイプの表示装置に用いることができる。Further, the antireflection film according to the present invention can be used for a plasma display and all other types of display devices in addition to the above-described display device.
【００４１】[0041]
【発明の効果】以上説明したように、発明によれば、良
好なアンチグレア効果とアンチリフレクション効果とを
同時に得ることができるので、優れた反射防止作用を得
ることができる反射防止膜を提供することができる。As described above, according to the present invention, a good anti-glare effect and an anti-reflection effect can be obtained at the same time. Can be.
【００４２】また、本発明に係る反射防止膜の製造方法
によれば、単層構造の反射防止膜で良好なアンチグレア
効果とアンチリフレクション効果とを同時に得ることが
できるので、製造工程が増えることもなく、コストの低
減を図ることができる。Further, according to the method of manufacturing an antireflection film according to the present invention, a good antiglare effect and an antireflection effect can be simultaneously obtained with a single-layer antireflection film, so that the number of manufacturing steps can be increased. Cost can be reduced.
【００４３】また、本発明に係る反射防止膜を種々の表
示装置に用いることで、表示画像の防眩性と視認性を大
幅に向上させることができる。Further, by using the antireflection film according to the present invention in various display devices, the antiglare property and visibility of a displayed image can be greatly improved.
【図１】本発明の実施の形態に係る反射防止膜の構造を
示す拡大断面図。FIG. 1 is an enlarged sectional view showing a structure of an antireflection film according to an embodiment of the present invention.
【図２】本発明に係る反射防止膜を備えた表示装置の一
例を示す概略断面図。FIG. 2 is a schematic sectional view showing an example of a display device provided with an antireflection film according to the present invention.
【図３】本発明に係る反射防止膜を備えた表示装置の一
例を示す概略断面図。FIG. 3 is a schematic cross-sectional view showing one example of a display device provided with the antireflection film according to the present invention.
１ 反射防止膜 ２ シリカ粒子 ３ シリカガラスバインダー ４ ガラス基板 ５ 気泡 ６ 気孔 １０，２０ 表示装置 １１ 液晶表示パネル １３ タブレット板 ２２ ＣＲＴ DESCRIPTION OF SYMBOLS 1 Antireflection film 2 Silica particles 3 Silica glass binder 4 Glass substrate 5 Bubbles 6 Pores 10, 20 Display device 11 Liquid crystal display panel 13 Tablet plate 22 CRT
Claims (13)
液に混合し、それを基板上にコーティング、焼成するこ
とにより形成された反射防止膜において、 前記ゾル液の平均分子量をポリスチレン換算で３０００
〜３００００に調整した、ことを特徴とする反射防止
膜。1. An anti-reflection film formed by mixing fine particles into a sol liquid prepared by a sol-gel method, coating the sol liquid on a substrate and baking the sol liquid, wherein the average molecular weight of the sol liquid is 3,000 in terms of polystyrene.
An antireflection film, which is adjusted to ~ 30000.
チの凹凸状に形成されると共に、前記微粒子の３次元マ
トリックス状連結により多孔質化されている、 請求項１記載の反射防止膜。2. The antireflection film according to claim 1, wherein a surface is formed in a concavo-convex shape at a predetermined pitch by agglomeration of the fine particles, and the particles are made porous by a three-dimensional matrix connection of the fine particles.
り分散されている、 請求項３記載の反射防止膜。4. The antireflection film according to claim 3, wherein the silica particles are dispersed by an alcohol solvent.
ルコール系有機溶剤とを主成分とする、 請求項１記載の反射防止膜。5. The anti-reflection film according to claim 1, wherein the sol liquid mainly contains tetraethoxysilane and an alcohol-based organic solvent.
液に混合し、それを基板上にコーティング、焼成するこ
とにより形成される反射防止膜の製造方法において、 前記ゾル液の平均分子量がポリスチレン換算で３０００
〜３００００になるように調整した後に、前記微粒子を
混合する、 ことを特徴とする反射防止膜の製造方法。6. A method for producing an antireflection film formed by mixing fine particles into a sol liquid prepared by a sol-gel method, coating the mixture on a substrate, and baking the mixture, wherein the average molecular weight of the sol liquid is calculated as polystyrene. 3000
The method for producing an anti-reflection film, wherein the fine particles are mixed after adjusting the particle size to ３０30000.
チの凹凸状に形成されると共に、前記微粒子の３次元マ
トリックス状連結により多孔質化されている、 請求項６記載の反射防止膜の製造方法。7. The method for producing an anti-reflection film according to claim 6, wherein the surface of the fine particles is formed in an irregular shape with a predetermined pitch by agglomeration of the fine particles, and is made porous by three-dimensional matrix connection of the fine particles. .
り分散させる、 請求項８記載の反射防止膜の製造方法。9. The method according to claim 8, wherein the silica particles are dispersed with an alcohol-based solvent.
アルコール系有機溶剤とを主成分とする、 請求項６記載の反射防止膜の製造方法。10. The method for producing an antireflection film according to claim 6, wherein the sol liquid mainly contains tetraethoxysilane and an alcohol-based organic solvent.
面、あるいは該表面の前方側に配置される部材のなくと
も１つのエアー界面に、請求項１乃至１０のいずれか１
項記載の反射防止膜を有する、 ことを特徴とする表示装置。11. The display unit according to claim 1, wherein at least one air interface is provided on a surface of the display unit on which information is displayed, or at least one air interface without a member disposed in front of the surface.
A display device, comprising the anti-reflection film according to claim 7.
らなる、 請求項１１記載の表示装置。13. The display device according to claim 11, wherein the display unit comprises a liquid crystal display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28879196A JPH10133002A (en) | 1996-10-30 | 1996-10-30 | Antireflection film, production of this antireflection film and display device using this antireflection film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28879196A JPH10133002A (en) | 1996-10-30 | 1996-10-30 | Antireflection film, production of this antireflection film and display device using this antireflection film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10133002A true JPH10133002A (en) | 1998-05-22 |
Family
ID=17734779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28879196A Pending JPH10133002A (en) | 1996-10-30 | 1996-10-30 | Antireflection film, production of this antireflection film and display device using this antireflection film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10133002A (en) |
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| WO2021221178A1 (en) * | 2020-04-30 | 2021-11-04 | 日本板硝子株式会社 | Display device |
-
1996
- 1996-10-30 JP JP28879196A patent/JPH10133002A/en active Pending
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| JP2005316450A (en) * | 2004-03-29 | 2005-11-10 | Dainippon Printing Co Ltd | Glare-proof laminate |
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| KR100964843B1 (en) | 2007-09-19 | 2010-06-22 | 조근호 | Tranparent film for endowing a substrate with antireflection effect |
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| JP2014503380A (en) * | 2010-11-10 | 2014-02-13 | スリーエム イノベイティブ プロパティズ カンパニー | Hydrophobic fluorinated coating |
| CN107311464A (en) * | 2017-07-10 | 2017-11-03 | 苏州新吴光电科技有限公司 | The preparation method of anti-dazzle porous composite film and the anti-dazzle glas using the composite membrane |
| WO2019240178A1 (en) | 2018-06-13 | 2019-12-19 | 日本板硝子株式会社 | Anti-glare film-attached substrate, image display device, and digital signage |
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