JPH08146206A - Window reflection preventive optical filter for vehicle - Google Patents
Window reflection preventive optical filter for vehicleInfo
- Publication number
- JPH08146206A JPH08146206A JP6284806A JP28480694A JPH08146206A JP H08146206 A JPH08146206 A JP H08146206A JP 6284806 A JP6284806 A JP 6284806A JP 28480694 A JP28480694 A JP 28480694A JP H08146206 A JPH08146206 A JP H08146206A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical filter
- triangular prism
- angle
- saw blade
- 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
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Landscapes
- Optical Elements Other Than Lenses (AREA)
- Instrument Panels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、車両用窓映り防止光学
フィルターに関し、特に自動車などの車両室内に存在す
る表示機器及び表示パネル用の車両用窓映り防止光学フ
ィルターに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle window anti-glare optical filter, and more particularly to a vehicle window anti-glare optical filter for a display device and a display panel existing in a vehicle compartment such as an automobile.
【０００２】[0002]
【従来技術】従来、自動車などの車両の室内には、スピ
ードメーター、時計及び各種警告灯などの多くの表示機
器が使用されている。近年では、これらの表示機器に加
えて、室内空調、オーディオの集中制御、テレビ及びナ
ビゲーションシステムの一部として自動車の現在位置や
目的地などの地図情報表示のために、ＣＲＴや液晶ディ
スプレイなどの表示パネルが導入されるようになってき
ている。2. Description of the Related Art Conventionally, many display devices such as a speedometer, a clock and various warning lights are used in the interior of a vehicle such as an automobile. In recent years, in addition to these display devices, displays such as CRTs and liquid crystal displays for indoor air conditioning, centralized control of audio, and display of map information such as the current position of automobiles and destinations as part of television and navigation systems. Panels are being introduced.
【０００３】上記表示機器は夜間に点灯状態となり、ま
た表示パネルはその機能上の特徴から昼夜を問わず点灯
状態となる場合が多い。一方、点灯状態となった表示機
器や表示パネルから発せられた光は、フロントウインド
などの窓ガラスの表面で反射した後にドライバーの視点
に直接入り、いわゆる窓映りとなって認識され、運転の
際の大きな障害となるという欠点があった。In many cases, the display device is turned on at night and the display panel is turned on regardless of day or night due to its functional characteristics. On the other hand, the light emitted from the display device or display panel that has been turned on enters the driver's viewpoint directly after being reflected on the surface of the window glass such as the front window, and is recognized as what is called a window reflection. It had the drawback that it would be a major obstacle.
【０００４】このような欠点を解決するために、通常は
窓ガラスの内側に反射防止膜を設けて、ガラス表面の反
射率を落としたり、遮光フィルムを挟み込んだ透明樹脂
製カバーを表示機器や表示パネル前面に設けてウインド
ウ方向へ発せられる光の角度を制御することにより対応
している。In order to solve such drawbacks, an antireflection film is usually provided on the inside of a window glass to reduce the reflectance of the glass surface, or a transparent resin cover having a light-shielding film sandwiched therein is used as a display device or display. This is done by controlling the angle of the light provided in the front of the panel and emitted in the window direction.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、表面に
反射防止膜を設けて反射防止を行う方法では、膜界面で
の反射光と透過光との光の打ち消し合いにより反射光強
度を低減する原理を利用しているため、可視領域の特定
波長の反射率は０％にすることができるが、それ以外の
波長領域では必ずしも低反射率とはならず全体の波長領
域で反射率を十分に低くすることができないという欠点
があった。However, in the method of providing antireflection by providing an antireflection film on the surface, the principle of reducing the intensity of the reflected light by canceling the reflected light and the transmitted light at the film interface is proposed. Since it is used, the reflectance at a specific wavelength in the visible region can be set to 0%, but the reflectance is not necessarily low in other wavelength regions, and the reflectance is sufficiently low in the entire wavelength region. It had the drawback of not being able to.
【０００６】また、膜構成は最低でも３層必要となるの
で、高コストになってしまうという欠点があった。更
に、ガラスの裏面からの反射光も防止するためには、裏
面、即ち車室外面にも反射防止膜を設けなければならな
いが、耐久性の面から実用は困難であるという欠点があ
った。Further, since the film structure requires at least three layers, there is a drawback that the cost becomes high. Further, in order to prevent the reflected light from the back surface of the glass, it is necessary to provide an antireflection film on the back surface, that is, the outer surface of the passenger compartment, but there is a drawback that practical use is difficult from the viewpoint of durability.
【０００７】一方、遮光フィルムを挟み込んだ透明樹脂
製カバーを表示機器や表示パネル前面に設ける方法で
は、遮光フィルムを黒く着色した樹脂と透明樹脂とを交
互に積層させ、最後に積層方向と垂直にある厚さで切断
するという工法で製造しているので、極めて高いコスト
であり自動車用途には適さず、更に遮光フィルムの透過
率が６０〜７０％と低いこと、ルーバーの間隔が２００
〜３００μｍと比較的大きいので、ルーバーの縞の状態
が肉眼でも認識することができること、液晶ディスプレ
ーなどに適用した場合には液晶の各セルとの干渉により
モアレ縞が現れることなどにより時計の文字自体が極め
て見づらくなるという欠点があった。On the other hand, in the method of providing a transparent resin cover sandwiching a light shielding film on the front surface of a display device or display panel, the light shielding film is alternately laminated with black colored resin and transparent resin, and finally, in a direction perpendicular to the lamination direction. Since it is manufactured by a method of cutting it at a certain thickness, it is extremely expensive and not suitable for automobile applications. Furthermore, the transmittance of the light-shielding film is low at 60 to 70%, and the interval between louvers is 200.
Since it is relatively large at ~ 300 μm, the state of the louver stripes can be recognized with the naked eye, and when applied to a liquid crystal display etc., moire fringes appear due to interference with each cell of the liquid crystal, etc. Has the drawback that it becomes very hard to see.
【０００８】従って本発明の目的は、窓映り防止性能が
極めて優れ、かつ低コストで製造可能な車両用窓映り防
止光学フィルターを提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vehicle window antiglare optical filter which is extremely excellent in window antiglare performance and can be manufactured at low cost.
【０００９】[0009]
【課題を解決するための手段】本発明の上記の目的は、
透明基板の表面上に断面が鋸刃形状の微細な三角柱突起
が同一方向に連続して配置された車両用窓映り防止光学
フィルターにおいて、隣接する三角柱突起の間隔が１０
〜２００μｍの範囲にあり、かつ鋸刃の頂角の角度が４
０〜８０°の範囲にあり、更には、三角柱突起の配置さ
れている面と反対側の面に幅５〜３０μｍの着色された
ストライプが設けられていることを特徴とする車両用窓
映り防止光学フィルターにより達成される。以下、本発
明を更に詳細に説明する。SUMMARY OF THE INVENTION The above objects of the present invention are as follows.
In a vehicle window anti-glare optical filter in which fine triangular prismatic protrusions having a saw-tooth-shaped cross section are continuously arranged in the same direction on the surface of a transparent substrate, the distance between adjacent triangular prismatic protrusions is 10
In the range of up to 200 μm, and the angle of the vertical angle of the saw blade is 4
In the range of 0 to 80 °, further, a colored stripe having a width of 5 to 30 μm is provided on the surface opposite to the surface on which the triangular prism projections are arranged, and the vehicle window reflection prevention. Achieved by optical filters. Hereinafter, the present invention will be described in more detail.
【００１０】図１はセンターコンソール部分の断面拡大
図及びドライバーが表示機器のひとつである時計から発
せられる光により窓映り像を視認することを説明する図
である。センターコンソール中央部分に設置されている
時計１から出た光はフロントウインドウ２へ向かい、ウ
インドウの表面で反射した後にドライバーの視点３にや
ってきて、時計の窓映り像としてドライバーに視認され
ることになる。FIG. 1 is an enlarged cross-sectional view of a center console part and a view for explaining that a driver visually recognizes a window image by light emitted from a timepiece which is one of display devices. The light emitted from the clock 1 installed in the central part of the center console travels to the front window 2, is reflected by the surface of the window, then comes to the driver's viewpoint 3, and is seen by the driver as a window image of the clock. Become.
【００１１】昼間は太陽光などの外光強度が極めて強力
なので、これらの光に対する窓映り光の強度比、即ちコ
ントラスト比が相対的に低くなるため、ドライバーの視
認性が大きく低下することはない。一方、夜間において
は外光強度が低下すると共に表示機器を点灯状態とする
ことにより窓映り光強度が増加し、結果としてコントラ
スト比が高くなるので外部視認上大きな障害となる。な
お、外光強度の比較的高い都心部又はその周辺より、夜
間外光強度が極端に低下する郊外や地方で特に問題とな
る。Since the intensity of outside light such as sunlight is extremely strong in the daytime, the intensity ratio of the window reflection light to these lights, that is, the contrast ratio is relatively low, so that the visibility of the driver is not significantly reduced. . On the other hand, at night, the intensity of outside light is reduced and the intensity of light reflected on the window is increased by turning on the display device, resulting in a high contrast ratio, which is a great obstacle to external visual recognition. It is a particular problem in the suburbs and rural areas where the nighttime external light intensity is extremely lower than that in the central area where the external light intensity is relatively high or its surroundings.
【００１２】図２はフロントウインドウの室内表面側に
反射防止膜４を設けることにより、窓映り防止を施して
いる方法を説明する図である。フロントウインドウの室
内側表面に反射した窓映り光の方向はそのままである
が、反射防止膜により光強度を低くすることによりコン
トラスト比を下げてドライバーから視認しにくくなるよ
うにしている。FIG. 2 is a view for explaining a method for preventing window reflection by providing an antireflection film 4 on the indoor surface side of the front window. Although the direction of the window reflection light reflected on the indoor side surface of the front window remains the same, the light intensity is reduced by the antireflection film to lower the contrast ratio and make it difficult for the driver to see.
【００１３】図３は時計の前面に遮光フィルターを挟み
込んだ透明樹脂製カバー５を設けてウインドウ方向へ発
される光の角度を制御することにより窓映り防止を施し
ている方法を説明する図である。時計から出た光が遮光
フィルターを挟み込んだ透明樹脂製カバーを通過する
と、透過光は透明樹脂製カバーの法線に対して一定の角
度範囲内に制限されるので、この透過光がフロントウイ
ンドウの表面で反射する位置はより上方となり、結果と
して反射光は視点上方へ逃げることになり、窓映り像と
してはドライバーに視認されないことになる。透過光が
出現する角度範囲は遮光フィルターの厚さとルーバーの
間隔により決定される。このような遮光フィルターとし
ては信越ポリマー株式会社製のものや住友スリーエム株
式会社製のものなどが知られている。FIG. 3 is a diagram for explaining a method of preventing window reflection by providing a transparent resin cover 5 with a light-shielding filter sandwiched in front of the watch to control the angle of light emitted toward the window. is there. When the light emitted from the watch passes through the transparent resin cover with the light blocking filter sandwiched, the transmitted light is limited within a certain angle range with respect to the normal line of the transparent resin cover. The position of reflection on the surface is higher, and as a result, the reflected light escapes above the viewpoint, and is not visible to the driver as a window image. The angle range in which the transmitted light appears is determined by the thickness of the shading filter and the distance between the louvers. As such a light-shielding filter, those manufactured by Shin-Etsu Polymer Co., Ltd., Sumitomo 3M Co., Ltd., and the like are known.
【００１４】図４は本発明の車両用窓映り防止光学フィ
ルター６をセンターコンソール中央部分の時計前面に透
明樹脂製カバーとして設置した場合の効果を説明する図
であり、図５は本発明の車両用窓映り防止光学フィルタ
ー６を通過する光の屈折状況を説明するための断面部分
拡大図である。FIG. 4 is a view for explaining the effect when the vehicle window reflection preventing optical filter 6 of the present invention is installed as a transparent resin cover on the front of the watch in the central portion of the center console, and FIG. 5 is a view of the vehicle of the present invention. FIG. 6 is an enlarged cross-sectional partial view for explaining a refraction state of light passing through the window reflection preventing optical filter 6.
【００１５】時計から出た光が、透明基板の表面上に、
断面が鋸刃形状の微細な三角柱突起が同一方向に連続し
て配置された車両用窓映り防止光学フィルターへ入射す
るとその表面形状に従って下方へ屈折するので、透過光
はある角度より上には現れなくなる。この屈折角は鋸刃
傾斜面の傾斜角度と材料の屈折率の増加に伴い大きくな
る。図５（ａ）は鋸刃傾斜面の傾斜角度が小さい場合、
図５（ｂ）は大きい場合の光の屈折状況を示す図であ
る。図５（ａ）に示すように鋸刃傾斜面の傾斜角度が小
さく屈折角が小さければ、図４（ａ）に示すように透過
光がフロントウインドウの表面で反射する位置はより上
方となって反射光は視点上方へ逃げ、逆に図５（ｂ）に
示すように鋸刃傾斜面の傾斜角度が大きく屈折角が大き
い場合には、図４（ｂ）に示すようにフロントウインド
ウの表面には反射しないので、いずれの場合も窓映りに
は問題がないことが判る。The light emitted from the clock is reflected on the surface of the transparent substrate.
When incident on a vehicle window anti-glare optical filter in which fine triangular protrusions with a sawtooth-shaped cross section are continuously arranged in the same direction, the light is refracted downward according to the surface shape, so the transmitted light appears above a certain angle. Disappear. This refraction angle increases as the inclination angle of the saw blade inclined surface and the refractive index of the material increase. FIG. 5 (a) shows that when the inclination angle of the saw blade inclined surface is small,
FIG. 5B is a diagram showing a refraction state of light when the light is large. As shown in FIG. 5 (a), if the saw blade inclined surface has a small inclination angle and a small refraction angle, the position at which the transmitted light is reflected by the surface of the windshield becomes higher as shown in FIG. 4 (a). The reflected light escapes to the upper side of the viewpoint, and conversely, when the saw blade inclined surface has a large inclination angle and the refraction angle is large as shown in FIG. 5 (b), as shown in FIG. Since it does not reflect, it can be seen that there is no problem in window reflection in any case.
【００１６】鋸刃形状三角柱を連続に配置した側はドラ
イバー側にあっても、又は時計側にあっても同等な光学
特性が得られるので、必要に応じてどちらかを選択して
も良い。Since the same optical characteristics can be obtained whether the sawtooth-shaped triangular prisms are continuously arranged on the driver side or the timepiece side, either one may be selected as required.
【００１７】この様に、表面上に断面が鋸刃形状の微細
な三角柱突起が同一方向に連続して配置された光学フィ
ルターを用いることにより窓映り防止が可能である。し
かし、図６に示す様に、時計から出た光の光学フィルタ
ー６への入射角が極端に大きい場合には、光が鋸刃垂直
面を通過して上方へ出てしまい、場合によっては遮光性
能が十分に発揮されないことがある。As described above, window reflection can be prevented by using an optical filter in which fine triangular prismatic protrusions having a saw-tooth-shaped cross section are continuously arranged in the same direction on the surface. However, as shown in FIG. 6, when the incident angle of the light emitted from the timepiece to the optical filter 6 is extremely large, the light passes through the vertical plane of the saw blade and goes out upward, and in some cases, the light is blocked. Performance may not be fully exhibited.
【００１８】図７は本発明の車両用窓映り防止光学フィ
ルター７の断面部分拡大図である。図７において、
（ｄ）（ｅ）（ｆ）は表面に鋸刃形状三角柱を連続に配
置した透明フィルム（ａ）（ｂ）（ｃ）を透明基板７上
に接着剤層８を挟んで積層したものであり、（ａ′）
（ｂ′）（ｃ′）（ｄ′）（ｅ′）（ｆ′）はそれぞれ
（ａ）（ｂ）（ｃ）（ｄ）（ｅ）（ｆ）の表面に必要に
応じてハードコート層９を設けたものである。FIG. 7 is an enlarged sectional view of the vehicle window reflection preventing optical filter 7 of the present invention. In FIG.
(D), (e) and (f) are obtained by laminating transparent films (a), (b) and (c) on the surface of which sawtooth triangular prisms are continuously arranged on a transparent substrate 7 with an adhesive layer 8 interposed therebetween. , (A ')
(B ') (c') (d ') (e') (f ') is a hard coat layer on the surface of (a) (b) (c) (d) (e) (f) if necessary. 9 is provided.
【００１９】図８（ａ）は、本発明の車両用窓映り防止
光学フィルターの遮光機能を説明するための図である。
図６の説明のところで述べたように、光の入射角が極端
に大きい場合には、存在する鋸刃垂直面を通過する光路
が遮光性能を阻害する要因となり好ましくない。従っ
て、図８（ａ）中に示す様に、断面が鋸刃形状の微細な
三角柱突起が同一方向に連続して配置された表面及び反
対側の面に、着色されたストライプ１１を設けることに
より、前記光路を吸収、遮断して、遮光性能を十分に維
持する。第８（ｂ）図は、本発明の車両用窓映り防止光
学フィルター７の斜視模式図である。FIG. 8A is a view for explaining the light blocking function of the vehicle window reflection preventing optical filter of the present invention.
As described in the explanation of FIG. 6, when the incident angle of light is extremely large, the optical path passing through the existing saw blade vertical surface becomes a factor that hinders the light shielding performance, which is not preferable. Therefore, as shown in FIG. 8 (a), by providing colored stripes 11 on the surface where fine triangular prismatic protrusions having a sawtooth-shaped cross section are continuously arranged in the same direction and on the opposite surface, By absorbing and blocking the optical path, the light blocking performance is sufficiently maintained. FIG. 8 (b) is a schematic perspective view of the vehicle window reflection preventing optical filter 7 of the present invention.
【００２０】図９は、多重に反射する透過光を防止する
ために形状工夫を施したことを説明する図である。図５
（ａ）（ｂ）中で示す破線は透過光が多重に反射する状
態を示すものであり、これが存在すると透過像のボケな
どが発生するが、図９に示す様に、鋸刃の頂角を除く他
の２つの角のうち角度の大きい角側に接している面を粗
面化することにより、この部分を通過する光を散乱させ
て光強度を低下させることが可能となるのである。さら
に、鋸刃垂直面を通過する光の強度もある程度低減でき
るので、遮光性能向上の点からも望ましい。FIG. 9 is a view for explaining that a shape has been devised to prevent transmitted light which is reflected in multiple layers. Figure 5
The broken lines shown in (a) and (b) indicate the state in which the transmitted light is reflected in multiples, and the presence of this causes blurring of the transmitted image. However, as shown in FIG. 9, as shown in FIG. By roughening the surface that is in contact with the larger angle side of the other two angles except for, it is possible to scatter the light passing through this portion and reduce the light intensity. Further, the intensity of light passing through the vertical surface of the saw blade can be reduced to some extent, which is also desirable from the viewpoint of improving the light shielding performance.
【００２１】この面の粗面化の程度は、１０点平均粗さ
Ｒｚが１０μｍ未満では透過像が多重となってしまい、
逆に１０μｍより大きいと光の散乱が激しく起こってし
まい表面全体が白色化してしまい好ましくない。With respect to the degree of roughening of this surface, if the 10-point average roughness Rz is less than 10 μm, the transmitted images will become multiple,
On the other hand, if the thickness is larger than 10 μm, light is strongly scattered and the entire surface is whitened, which is not preferable.
【００２２】断面が鋸刃形状の微細な三角柱突起の間隔
が１０μｍより小さいと、透過像の品質低下を招き、逆
に２００μｍより大きいと鋸刃の頂角部分が欠けやす
く、かつ透き間にゴミが混入すると容易に除去すること
ができず、好ましくない。断面が鋸刃形状の微細な三角
柱突起の鋸刃の頂角の角度が４０°より小さい場合には
鋸刃傾斜面の傾斜角度が大きくなり三角柱突起が形成し
にくく、８０°より大きい場合には鋸刃内で光が十分に
屈折しないので遮光性能も向上せず好ましくない。ま
た、鋸刃の頂角以外の残る１つの角の角度が１０°より
小さい場合には鋸刃傾斜面の傾斜角度が小さくて光が十
分に屈折しないため遮光機能が向上せず、４０°より大
きい場合には鋸刃傾斜面の傾斜角度が大きくなり三角柱
突起が形成しにくく好ましくない。If the distance between the fine triangular protrusions having a saw blade-shaped cross section is smaller than 10 μm, the quality of the transmitted image is deteriorated. On the contrary, if it is larger than 200 μm, the apex angle portion of the saw blade is liable to be chipped and dust is left between the gaps. If mixed, it cannot be easily removed, which is not preferable. When the angle of the vertical angle of the saw blade of the fine triangular protrusion having a saw blade-shaped cross section is smaller than 40 °, the inclination angle of the saw blade inclined surface becomes large and it is difficult to form the triangular protrusion, and when it is larger than 80 °. Since the light is not sufficiently refracted in the saw blade, the light shielding performance is not improved, which is not preferable. When the angle of the remaining one angle other than the apex angle of the saw blade is smaller than 10 °, the inclination angle of the saw blade inclined surface is small and the light is not sufficiently refracted, so that the light shielding function is not improved, If it is large, the angle of inclination of the saw blade inclined surface becomes large and it is difficult to form triangular prism protrusions, which is not preferable.
【００２３】遮光性ストライプの幅は所望する遮光性能
に応じて任意に設定可能であるが、三角柱連続突起の間
隔の１／２０より小さいと十分な遮光機能が発揮され
ず、また間隔の１／２より大きいとフィルタ全体の透過
率が低下してしまう。このため、三角柱連続突起の間隔
の１／２０〜１／２の範囲内にあることが望ましい。更
に、遮光性ストライプの間隔は所望する遮光性能に応じ
て任意に設定可能であるが、三角柱連続突起の間隔の１
／２より小さいか、または１／１より大きいと遮光機能
が向上せず好ましくない。このため、三角柱連続突起の
間隔の１／１〜１／２の範囲内にあることが望ましい。The width of the light-shielding stripe can be arbitrarily set according to the desired light-shielding performance. However, if it is smaller than 1/20 of the interval between the triangular prism continuous projections, a sufficient light-shielding function is not exhibited, and 1 / of the interval is provided. If it is larger than 2, the transmittance of the entire filter is lowered. Therefore, it is desirable that the distance is within the range of 1/20 to 1/2 of the distance between the triangular prism continuous protrusions. Further, the interval of the light-shielding stripes can be arbitrarily set according to the desired light-shielding performance, but the interval of the triangular prism continuous protrusions is 1
If it is smaller than / 2 or larger than 1/1, the light shielding function is not improved, which is not preferable. For this reason, it is desirable that it is within a range of 1/1 to 1/2 of the interval between the triangular prism continuous protrusions.
【００２４】本発明において用いられる透明基板として
は、ポリカーボネート（ＰＣ）、ポリメチルメタクリレ
ート（ＰＭＭＡ）、ポリスチレンなどの透明樹脂やガラ
スなどから任意に選択することができる。また、フィル
ムを用いる場合のフィルムとしては、ポリエチレンテレ
フタレート（ＰＥＴ）、ポリイミド（ＰＩ）を始めとし
て、ポリプロピレン（ＰＰ）、ポリスチレン（ＰＳ）、
塩化ビニル、ナイロン、トリアセテート、セロハンなど
が好適に用いられるが、機械的性質、熱的性質及び電気
特性のすべてにバランスが取れていることから、特にＰ
ＥＴが好ましい。The transparent substrate used in the present invention can be arbitrarily selected from transparent resins such as polycarbonate (PC), polymethylmethacrylate (PMMA) and polystyrene, and glass. When a film is used, polyethylene terephthalate (PET), polyimide (PI), polypropylene (PP), polystyrene (PS),
Vinyl chloride, nylon, triacetate, cellophane, etc. are preferably used, but since they have well-balanced mechanical properties, thermal properties, and electrical properties, P
ET is preferred.
【００２５】透明基板の表面における直接鋸刃形状三角
柱の突起は、機械加工、ワイヤーカット放電加工などに
より予め表面に所望の鋸刃形状三角柱連続突起を形成し
た金型を用い、射出成形や加圧成形法などにより金型表
面の形状を直接転写することにより連続的に設けること
ができる。The projection of the sawtooth-shaped triangular prism directly on the surface of the transparent substrate is injection-molded or pressed using a die in which desired sawtooth-shaped triangular prism continuous projections are previously formed on the surface by machining, wire-cut electric discharge machining or the like. It can be continuously provided by directly transferring the shape of the mold surface by a molding method or the like.
【００２６】鋸刃の頂角を除く他の２つの角のうち角度
の大きい角側に接している面を粗面化する方法として
は、金型表面へ鋸刃形状三角柱連続突起を機械加工した
後に鋸刃垂直面も機械加工、サンドブラストなどにより
粗面化することにより成形と同時に転写してしまう方法
と、表面へ鋸刃形状三角柱連続突起を機械加工した金型
を用いて成形、転写した鋸刃垂直面をサンドブラスト処
理などにより粗面化する方法とがある。As a method of roughening the surface in contact with the larger angle side of the two angles other than the apex angle of the saw blade, saw blade shaped triangular prism continuous protrusions are machined on the die surface. After that, the vertical surface of the saw blade is also machined and transferred by roughening by sandblasting, etc. to transfer it at the same time as forming, and the saw that is formed and transferred using a die machined with sawtooth triangular prism continuous projections on the surface. There is a method of roughening the blade vertical surface by sandblasting or the like.
【００２７】また、フィルム表面における鋸刃形状三角
柱の突起は、機械加工、放電加工及びフォトリソグラフ
ィによる異方性エッチングなどにより予め表面に鋸刃形
状三角柱連続突起を形成したロールを用いて、ロール間
にフィルムを連続的に通過、プレスして転写することに
より連続的に設けることができる。The saw blade-shaped triangular prism protrusions on the surface of the film are formed between rolls by using a roll in which saw blade-shaped triangular prism continuous protrusions are previously formed on the surface by machining, electric discharge machining or anisotropic etching by photolithography. The film can be continuously provided by continuously passing the film through, pressing and transferring.
【００２８】この際、フィルムを直接プレスして鋸刃形
状を転写したり、又は予め紫外線や電子線などの活性光
線や熱により硬化可能な硬化性組成物を塗布したフィル
ムにプレスして鋸刃形状を転写した後に、硬化性樹脂組
成物に活性光線や熱をさらして硬化したりする方法があ
る。At this time, the film is directly pressed to transfer the shape of the saw blade, or the film is preliminarily coated with a curable composition which is curable by actinic rays such as ultraviolet rays and electron beams and heat. After transferring the shape, there is a method of exposing the curable resin composition to actinic rays or heat to cure the composition.
【００２９】紫外線硬化樹脂としては、光重合性プレポ
リマー、光重合性モノマー及び光開始剤を主成分として
成る「ソーラプレン」（三井東圧化学株式会社の商標
名）や「アデカオプト２」（旭電化株式会社の商標名）
などがある。これらの硬化性樹脂組成物の膜厚は５００
μｍ以下であることが好ましいが、転写精度を考慮する
と１００μｍ程度であることが好ましい。Examples of the ultraviolet curable resin include "Solarprene" (trademark of Mitsui Toatsu Chemicals, Inc.) and "Adekaopt 2" (Asahi Denka Co., Ltd.) containing a photopolymerizable prepolymer, a photopolymerizable monomer and a photoinitiator as main components. (Trademark name of corporation)
and so on. The film thickness of these curable resin compositions is 500.
The thickness is preferably less than or equal to μm, but is preferably about 100 μm in consideration of transfer accuracy.
【００３０】断面が鋸刃形状の三角柱突起が同一方向に
連続的に設けられた面と反対側の面に設けられる着色さ
れたストライプは、三角柱突起形成の後にスクリーン印
刷法で印刷することにより形成可能である。The colored stripes provided on the surface opposite to the surface on which the triangular prismatic protrusions having a saw-tooth cross section are continuously provided in the same direction are formed by printing by the screen printing method after forming the triangular prismatic protrusions. It is possible.
【００３１】鋸刃の頂角を除く他の２つの角のうち角度
の大きい角側に接している面の粗面化は、透明基板表面
に直接鋸刃形状三角柱の突起を連続的に設ける方法と同
様にして行うことができる。Roughening of the surface in contact with the larger angle of the two angles other than the apex angle of the saw blade is carried out by directly providing the sawtooth-shaped triangular prism projections directly on the transparent substrate surface. It can be performed in the same manner as.
【００３２】表面に鋸刃形状三角柱の連続突起を設けた
フィルムと透明基板とを接着するに際しては、透明基板
の表面に接着剤を塗布してフィルムを貼り合わせること
が一般的である。この際、用いられる接着剤としては、
一般的な熱可塑性接着剤、エラストマー接着剤及び熱硬
化性接着剤などを単独で使用しても良く、また必要に応
じて２種以上を混合して使用しても良い。When a transparent substrate is bonded to a film having sawtooth-shaped triangular prism-shaped continuous protrusions on its surface, it is common to apply an adhesive to the surface of the transparent substrate and bond the films together. At this time, as the adhesive used,
Common thermoplastic adhesives, elastomer adhesives, thermosetting adhesives, etc. may be used alone, or if necessary, two or more kinds may be mixed and used.
【００３３】例えば、主剤である液状エポキシ樹脂と硬
化剤である芳香族アミンを主成分として成る熱硬化性の
エポキシ系接着剤（市販品としては「セメダインＣＳ−
２３４０−５」：セメダイン株式会社の商品番号）など
を用いれば良い。接着剤の膜厚は１μｍ以下であること
が好ましい。For example, a thermosetting epoxy adhesive mainly composed of a liquid epoxy resin as a main component and an aromatic amine as a curing agent (commercially available as “Cemedine CS-
2340-5 ”: a product number of Cemedine Co., Ltd.) or the like may be used. The film thickness of the adhesive is preferably 1 μm or less.
【００３４】一般に自動車用表示機器や表示パネルに使
用されるフィルターは、運転者及び同乗者の手に直接触
れる場所にあるため、表面はある程度の機械的強度を有
することが必要とされる。表面の強度が要求される場合
には、鋸刃形状の表面にハードコート層を設けても差し
支えない。このハードコート層は鋸刃傾斜面のみ設けて
も良く、又は全面に設けても差し支えない。ハードコー
ト層としては熱硬化性樹脂などがあり、例えばシリコー
ン系コーティング液を塗布、硬化したものなどが好適に
用いられる。Generally, a filter used for an automobile display device or a display panel is in a place where it directly comes into contact with the hands of a driver and a passenger, and therefore the surface is required to have some mechanical strength. If surface strength is required, a hard coat layer may be provided on the saw-toothed surface. This hard coat layer may be provided only on the inclined surface of the saw blade, or may be provided on the entire surface. The hard coat layer may be a thermosetting resin or the like, and for example, one obtained by applying and curing a silicone-based coating liquid is preferably used.
【００３５】シリコーン系コーティング液としては、従
来よりプラスチックの表面硬化層として使用されている
シロキサン結合を有するものが好適に使用することがで
きる。このようなシリコーン系コーティング層は、一般
式ＲｎＳｉ（ＯＲ′）4-n （式中、ｎは１〜３の整数、
Ｒは炭素数１〜６の炭化水素基、Ｒ′は炭素数１〜４の
アルキル基を示す。）で表される化合物と、四アルコキ
シ珪素の共部分加水分解物、又はこれらの分解物との混
合物を主成分として成るコーティング剤（特開昭５７−
１７７０２８号公報、「スミユニ」：住友化学工業株式
会社の商標名）、又はメチルシルセスキシロキサン及び
コロイダル状シリカの混合物を主成分として成るコーテ
ィング剤（「トスガード」：東芝シリコーン株式会社の
商標名）などを塗布することにより形成される。塗布の
方法としては、流し塗り法、スプレー法、ディッピング
法及びスピンコート法などを使用することができる。As the silicone-based coating liquid, a liquid having a siloxane bond, which has been conventionally used as a surface-hardening layer for plastics, can be preferably used. Such a silicone-based coating layer has a general formula RnSi (OR ') 4-n (wherein n is an integer of 1 to 3,
R is a hydrocarbon group having 1 to 6 carbon atoms, and R'is an alkyl group having 1 to 4 carbon atoms. ), A coating agent comprising a co-partial hydrolyzate of tetraalkoxysilicon or a mixture of these hydrolyzates as a main component (JP-A-57-
No. 177028, "Sumiuni": trade name of Sumitomo Chemical Co., Ltd.), or a coating agent containing a mixture of methylsilsesquisiloxane and colloidal silica as a main component ("Tosguard": trade name of Toshiba Silicone Co., Ltd.), etc. It is formed by applying. As a coating method, a flow coating method, a spray method, a dipping method, a spin coating method, or the like can be used.
【００３６】次に、本発明の車両用窓映り防止光学フィ
ルターの製造方法について説明する。鋸刃形状三角柱の
突起を連続的に透明基板の表面に直接形成する場合に
は、まず射出成形や加圧成形法で用いる金型表面を機械
加工やワイヤーカット放電加工により精密加工し、所望
の鋸刃形状三角柱連続突起を形成する。Next, a method of manufacturing the vehicle window reflection preventing optical filter of the present invention will be described. When continuously forming protrusions of a saw-toothed triangular prism directly on the surface of a transparent substrate, first the mold surface used in injection molding or pressure molding is precisely processed by machining or wire cut electrical discharge machining, and then the desired Saw blade-shaped triangular prism continuous protrusions are formed.
【００３７】射出成形法では、透明基板の原料となる樹
脂又はガラスを加熱して溶融させたものをこの金型中へ
圧力を加えて導入した後に溶融温度以下で所定時間維持
して成形し、表面に鋸刃形状三角柱連続突起を転写す
る。加圧成形法では透明基板を予め軟化温度以上に加熱
した後に金型にセットし、次いで圧力を加えながら所定
時間維持し、表面に鋸刃形状三角柱連続突起を転写す
る。In the injection molding method, a resin or glass which is a raw material of a transparent substrate is heated and melted, and a material is introduced into the mold by applying pressure, and thereafter, is molded at a temperature below the melting temperature for a predetermined time, Saw blade-shaped triangular prism continuous protrusions are transferred to the surface. In the pressure molding method, a transparent substrate is heated to a softening temperature or higher in advance and then set in a mold, and then pressure is maintained for a predetermined time to transfer sawtooth-shaped triangular prism continuous protrusions to the surface.
【００３８】鋸刃の頂角を除く他の２つの角のうち角度
の大きい角側に接している面を粗面化する方法としてサ
ンドブラスト処理を用いる場合には、平均粒径約２０μ
ｍのガラスビース、圧力２Ｋｇｆ／の圧縮空気で約６０
秒間処理を行う。次いで、スクリーン印刷機にセットし
た後に位置決めを行ない、所定幅で着色したストライプ
を形成する。表面に形成した鋸刃形状三角柱連続突起の
機械的強度が十分でない場合にハードコート層を設ける
場合には、射出成形や加圧成形により表面に鋸刃形状三
角柱連続突起を転写した後にシリコーン系コーティング
液を表面に塗布する。膜厚は５〜１０μｍの範囲である
ことが好ましい。塗布した後、２０分間放置して風乾さ
せ、続いて１２０℃で６０分間保持してハードコート層
を形成する。When sandblasting is used as a method of roughening the surface in contact with the larger angle of the two angles other than the apex angle of the saw blade, the average grain size is about 20 μm.
Glass bead of m, about 60 with compressed air of pressure 2 Kgf /
Process for seconds. Then, after setting in a screen printing machine, positioning is performed to form colored stripes with a predetermined width. When the hard coat layer is provided when the mechanical strength of the saw blade-shaped triangular prism continuous protrusions is not sufficient, silicone coating is applied after the saw blade-shaped triangular prism continuous protrusions are transferred to the surface by injection molding or pressure molding. Apply the liquid to the surface. The film thickness is preferably in the range of 5 to 10 μm. After coating, it is left to stand for 20 minutes to be air-dried, and then kept at 120 ° C. for 60 minutes to form a hard coat layer.
【００３９】フィルム表面に鋸刃形状三角柱の突起を連
続的に形成し、透明基板と接着するに際しては、まずフ
ィルムをイソプロピルアルコールによる脱脂処理をした
後、純水リンス及び窒素ブロー乾燥して洗浄する。直接
フィルム表面に加工する場合にはフィルム又はロールを
所定温度まで加熱しておく。また、硬化性樹脂組成物を
用いる場合には、まず硬化性樹脂組成物を所定の厚さに
塗布した後に紫外線、電子線又は熱を僅かに加えて、硬
化性樹脂組成物を半硬化させた状態にする。When continuously forming protrusions of a saw-toothed triangular prism on the surface of the film and adhering it to the transparent substrate, the film is first degreased with isopropyl alcohol, then rinsed with pure water and dried with nitrogen blow to clean. . When directly processing the film surface, the film or roll is heated to a predetermined temperature. When the curable resin composition is used, first, the curable resin composition is applied to a predetermined thickness, and then ultraviolet rays, electron beams or heat is slightly added to semi-cure the curable resin composition. Put in a state.
【００４０】紫外線硬化樹脂の場合には紫外線露光装置
にて紫外線を１０秒間、電子線硬化性樹脂の場合には電
子線照射装置にて電子線を約２０秒間、熱硬化性樹脂の
場合には８０℃で１分間処理する。次に、鋸刃形状三角
柱の連続突起が表面に加工されたロールの間にこのフィ
ルムを通過させてプレスし、鋸刃形状三角柱連続突起を
フィルム上の半硬化させた硬化性樹脂組成物へ転写す
る。そして再び所定の方法により硬化性樹脂組成物を完
全に硬化させて、鋸刃形状三角柱連続突起を固定化す
る。紫外線及び電子線硬化性樹脂の場合には照射時間３
分間以上、熱硬化性樹脂の場合には１００℃で１０分間
以上処理すれば完全に硬化する。In the case of an ultraviolet curable resin, an ultraviolet ray is irradiated with an ultraviolet ray exposure device for 10 seconds, in the case of an electron beam curable resin, an electron beam is irradiated with an electron beam for about 20 seconds, and in the case of a thermosetting resin. Treat at 80 ° C for 1 minute. Next, this film is passed through a roll between rolls having saw blade-shaped triangular prism continuous protrusions processed on the surface, and the saw blade-shaped triangular prism continuous protrusions are transferred to a semi-cured curable resin composition on the film. To do. Then, the curable resin composition is completely cured again by a predetermined method to fix the sawtooth-shaped triangular prism continuous protrusions. Irradiation time 3 for UV and electron beam curable resins
If the thermosetting resin is treated for at least 10 minutes and at 100 ° C. for 10 minutes or more, it is completely cured.
【００４１】鋸刃の頂角を除く他の２つの角のうち角度
の大きい角側に接している面を粗面化する方法としてサ
ンドブラスト処理を用いる場合には、平均粒径約２０μ
ｍのガラスビース、圧力２Ｋｇｆ／ｃｍ2 の圧縮空気で
約６０秒間処理を行う。次いで、スクリーン印刷機にセ
ットした後に位置決めを行ない、所定幅で着色したスト
ライプを形成する。次に、透明基板の表面へ接着剤を所
定厚さに塗布した後に、接着剤が乾燥しないうちにフィ
ルムを端から皺にならないように順に貼り付ける。When sandblasting is used as a method of roughening the surface in contact with the larger angle of the two angles other than the apex angle of the saw blade, the average grain size is about 20 μm.
m glass bead and compressed air having a pressure of 2 Kgf / cm 2 for about 60 seconds. Then, after setting in a screen printing machine, positioning is performed to form colored stripes with a predetermined width. Next, after the adhesive is applied to the surface of the transparent substrate to a predetermined thickness, the films are attached in order so that the film does not become wrinkled from the edges before the adhesive dries.
【００４２】表面に形成した鋸刃形状三角柱連続突起の
機械的強度が十分でない場合にハードコート層を設ける
場合には、フィルムと透明基体とを接着したフィルター
の鋸刃形状表面へシリコン系コーティング液を塗布す
る。膜厚は５〜１０μｍの範囲にあることが好ましい。
塗布した後、２０分間放置して風乾させ、続いて１２０
℃で６０分間保持してハードコート層を形成する。When the hard coat layer is provided when the mechanical strength of the saw-tooth-shaped triangular prism continuous projections formed on the surface is not sufficient, the surface of the saw-tooth-shaped surface of the filter to which the film and the transparent substrate are adhered is coated with a silicon-based coating liquid. Apply. The film thickness is preferably in the range of 5 to 10 μm.
After application, leave it for 20 minutes to air dry, then 120
Hold at 60 ° C. for 60 minutes to form a hard coat layer.
【００４３】以上のようにして成形した車両用窓映り防
止光学フィルターの窓映り防止性能を、以下のようにし
て評価した。実際に走行可能な自動車の時計の透明樹脂
製カバーを本発明の車両用窓映り防止光学フィルターと
交換した後に昼夜を問わず様々な環境下で走行し、時計
からの光がフロントウインドの室内側表面で反射してド
ライバーの視点に入って窓映りを起こすことにより運転
に支障が生じるか、また時計の文字盤が見にくいかにつ
いて調べた。The anti-windowing performance of the vehicle anti-glare optical filter molded as described above was evaluated as follows. After exchanging the transparent resin cover of the vehicle clock that can be actually driven with the vehicle window reflection preventing optical filter of the present invention, the vehicle travels in various environments day and night, and the light from the clock is emitted from the inside of the front window. I investigated whether driving would be hindered by reflection on the surface and entering the driver's point of view to cause window reflections, and whether the clock face was difficult to see.
【００４４】どの条件下でも窓映りが認識されず運転に
支障が無く、また時計の文字盤にも問題無く視認するこ
とができれば、本発明の車両用窓映り防止光学フィルタ
ーの窓映り防止効果はあると判断された。If the window reflection is not recognized under any condition, the driving is not hindered, and the clock dial can be visually recognized without any problem, the effect of preventing the window reflection of the vehicle window reflection prevention optical filter of the present invention is achieved. It was decided that there was.
【００４５】[0045]
【実施例】以下、本発明を次の実施例及び比較例によっ
て更に詳述するが、本発明はこれによって限定されるも
のではない。The present invention will be described in more detail below with reference to the following examples and comparative examples, but the present invention is not limited thereto.
【００４６】実施例１ 鋸刃の頂角及び残る１つの角がそれぞれ４５°，２０°
であり、かつ間隔２０μｍの鋸刃形状三角柱連続突起を
縦型ＮＣフライス加工盤により表面に形成した金型を用
いて、射出成形法により厚さ２ｍｍのアクリル製透明基
板を形成した。次いでスクリーン印刷法により三角柱連
続突起の設けられている面と反対側の表面に幅１０μ
ｍ、間隔２０μｍの遮光性ストライプを連続して設け
た。このようにして作製した、車両用窓映り防止光学フ
ィルターの窓映り防止性能を評価した結果、いかなる走
行条件下でも窓映り光は認識されず、また運転にも全く
支障がなかった。Example 1 The vertical angle of the saw blade and the remaining one angle are 45 ° and 20 °, respectively.
A 2 mm-thick acrylic transparent substrate was formed by an injection molding method using a mold in which saw blade-shaped triangular prism continuous protrusions with a spacing of 20 μm were formed on the surface by a vertical NC milling machine. Then, by a screen printing method, a width of 10 μm is formed on the surface opposite to the surface on which the triangular prism continuous protrusions are provided.
m, and a light-shielding stripe having a distance of 20 μm was continuously provided. As a result of evaluating the window reflection preventing performance of the vehicle window reflection preventing optical filter produced in this manner, no window reflection light was recognized under any running conditions, and there was no problem in driving.
【００４７】実施例２ 鋸刃の頂角及び残る１つの角がそれぞれ６０°，３０°
であり、かつ間隔８０μｍの鋸刃形状三角柱連続突起を
ワイヤーカット放電加工盤により表面に形成した金型を
用いて、射出成形法により厚さ２ｍｍのポリカーボネー
ト製透明基板を形成した。次いでスクリーン印刷法によ
り三角柱連続突起の設けられている面と反対側の表面に
幅２０μｍ、間隔４０μｍの遮光性ストライプを連続的
に設けた。このようにして作製した、車両用窓映り防止
光学フィルターの窓映り防止性能を評価した結果、いか
なる走行条件下でも窓映り光は認識されず、また運転に
も全く支障がなかった。Example 2 The apex angle of the saw blade and the remaining one angle are 60 ° and 30 °, respectively.
A transparent substrate made of polycarbonate having a thickness of 2 mm was formed by an injection molding method using a mold in which saw blade-shaped triangular prism continuous protrusions having an interval of 80 μm were formed on the surface by a wire cut electric discharge machine. Next, a light-shielding stripe having a width of 20 μm and an interval of 40 μm was continuously provided on the surface opposite to the surface provided with the triangular prism continuous protrusions by a screen printing method. As a result of evaluating the window reflection preventing performance of the vehicle window reflection preventing optical filter produced in this manner, no window reflection light was recognized under any running conditions, and there was no problem in driving.
【００４８】実施例３ 厚さ１５０μｍのＰＥＴフィルム上へ紫外線硬化性樹脂
組成物「ソーラプレン」（三井東圧化学株式会社の商標
名）を約１００μｍ塗布した後、鋸刃の頂角及び残る１
つの角がそれぞれ７５°，３０°であり、かつ間隔６０
μｍの鋸刃形状三角柱連続突起を転写し、紫外線照射装
置により紫外線を２分間照射して紫外線硬化性樹脂組成
物を硬化させた。次いでスクリーン印刷法により三角柱
連続突起の設けられている面と反対側の表面に幅２８μ
ｍ、間隔８０μｍの遮光性ストライプを連続的に設け
た。続いて大きさ１５０ｍｍ×４５０ｍｍ×２ｍｍｔの
アクリル製透明基板とフィルムとを接着剤として熱硬化
性エポキシ系接着剤「セメダインＣＳ−２３４０−５」
（セメダイン株式会社の商品番号）を用いて接着した。
このようにして作製した、車両用窓映り防止光学フィル
ターの窓映り性能を評価した結果、いかなる走行条件下
でも窓映り光は認識されず、また運転にも全く支障が無
かった。Example 3 An ultraviolet curable resin composition "Solarprene" (trade name of Mitsui Toatsu Chemicals, Inc.) was applied to a PET film having a thickness of 150 μm by about 100 μm, and then the vertical angle of the saw blade and the remaining 1
Each angle is 75 ° and 30 °, and the distance is 60
A saw blade-shaped triangular prism continuous protrusion having a size of μm was transferred, and ultraviolet rays were irradiated for 2 minutes by an ultraviolet irradiation device to cure the ultraviolet curable resin composition. Then, by a screen printing method, a width of 28 μ is formed on the surface opposite to the surface on which the triangular prism continuous protrusions are provided.
m, and a light-shielding stripe having an interval of 80 μm was continuously provided. Subsequently, a thermosetting epoxy-based adhesive "Cemedine CS-2340-5" using an acrylic transparent substrate having a size of 150 mm x 450 mm x 2 mmt and a film as an adhesive.
(Cemedine Co., Ltd. product number) was used for adhesion.
As a result of evaluating the window reflection performance of the vehicle window reflection prevention optical filter produced in this manner, no window reflection light was recognized under any running conditions, and there was no problem in driving.
【００４９】実施例４ 鋸刃の頂角及び残る１つの角をそれぞれ５０°，３５°
とし、鋸刃形状三角柱連続突起の転写間隔を１００μｍ
とし、更に遮光性ストライプの幅を６μｍ、間隔を１０
０μｍとした他は、実施例３と全く同様にして車両用窓
映り防止光学フィルターを作製した。このようにして作
製した、車両用窓映り防止光学フィルターの窓映り防止
性能を評価した結果、いかなる走行条件下でも窓映り光
は認識されず、また運転にも全く支障が無かった。Example 4 The vertical angle of the saw blade and the remaining one angle were 50 ° and 35 °, respectively.
And the transfer interval of sawtooth-shaped triangular prism continuous protrusions is 100 μm.
And the width of the light-shielding stripes is 6 μm and the interval is 10
A vehicle window anti-glare optical filter was produced in exactly the same manner as in Example 3 except that the thickness was 0 μm. As a result of evaluating the window reflection prevention performance of the vehicle window reflection prevention optical filter produced in this manner, no window reflection light was recognized under any running conditions, and there was no problem in driving.
【００５０】実施例５ 鋸刃の頂角及び残る１つの角をそれぞれ４０°，１０°
とし、鋸刃形状三角柱連続突起の転写間隔を１００μｍ
とし、更に遮光性ストライプの幅を１５μｍ、間隔を６
０μｍとした他は、実施例３と全く同様にして車両用窓
映り防止光学フィルターを作製した。このようにして作
製した、車両用窓映り防止光学フィルターの窓映り防止
性能を評価した結果、いかなる走行条件下でも窓映り光
は認識されず、また運転にも全く支障が無かった。Example 5 The vertical angle of the saw blade and the remaining one angle are 40 ° and 10 °, respectively.
And the transfer interval of sawtooth-shaped triangular prism continuous protrusions is 100 μm.
And the width of the light-shielding stripes is 15 μm and the interval is 6
A vehicle window anti-glare optical filter was produced in exactly the same manner as in Example 3 except that the thickness was 0 μm. As a result of evaluating the window reflection prevention performance of the vehicle window reflection prevention optical filter produced in this manner, no window reflection light was recognized under any running conditions, and there was no problem in driving.
【００５１】実施例６ 表面に更にハードコート層として「トスガード」（東芝
シリコーン株式会社の商標名）を１μｍになるように塗
布した他は、実施例３と全く同様な方法により車両用窓
映り防止光学フィルターを作製した。このようにして作
製した、車両用窓映り防止光学フィルターの窓映り防止
性能を評価した結果、いかなる走行条件下でも窓映り光
は認識されず、また運転にも全く支障が無かった。Example 6 In the same manner as in Example 3, except that "Tosguard" (trade name of Toshiba Silicone Co., Ltd.) was further applied as a hard coat layer on the surface to prevent reflection of vehicle windows. An optical filter was produced. As a result of evaluating the window reflection prevention performance of the vehicle window reflection prevention optical filter produced in this manner, no window reflection light was recognized under any running conditions, and there was no problem in driving.
【００５２】実施例７ 縦型ＮＣフライス加工盤により、頂角及び残る１つの角
がそれぞれ４０°，２０°であり、かつ鋸刃の頂角を除
く他の２つの角のうち角度の大きい角側に接している面
の１０点平均粗さが０．２μｍ、間隔が１００μｍであ
る鋸刃形状三角柱連続突起を表面に形成した金型を用い
て、射出成形法により厚さ２ｍｍのアクリル製透明基板
を形成した。次いでスクリーン印刷法により三角柱連続
突起の設けられている面と反対側の表面に幅２２μｍ、
間隔８５μｍの遮光性ストライプを連続的に設けた。こ
のようにして作製した、表面に鋸刃形状の三角柱連続突
起を有する車両用窓映り防止光学フィルターの窓映り防
止性能を評価した結果、いかなる走行条件下でも窓映り
光は認識されず、また運転にも全く支障が無かった。Example 7 With a vertical NC milling machine, the apex angle and the remaining one angle are 40 ° and 20 °, respectively, and the angle with the largest angle of the two other angles excluding the apex angle of the saw blade. A 10 mm average roughness of the surface in contact with the side is 0.2 μm, and a die with a saw-toothed triangular prism continuous projection with a spacing of 100 μm is used on the surface by an injection molding method to make a transparent acrylic film with a thickness of 2 mm. The substrate was formed. Then, by a screen printing method, a width of 22 μm is formed on the surface opposite to the surface on which the triangular prism continuous protrusions are provided,
Light-shielding stripes having an interval of 85 μm were continuously provided. As a result of evaluating the anti-windowing performance of the vehicle anti-glare optical filter having the sawtooth-shaped triangular prism continuous protrusions produced in this way, no windowing light was recognized under any driving conditions, There was no problem at all.
【００５３】実施例８ ワイヤーカット放電加工盤により、頂角及び残る１つの
角がそれぞれ５２°，２５°であり、かつ鋸刃の頂角を
除く他の２つの角のうち角度の大きい角側に接している
面の１０点平均粗さが０．６μｍ、間隔が１５０μｍの
鋸刃形状三角柱連続突起を形成した金型を用いて、射出
成形法により厚さ２ｍｍのポリカーボネート製透明基板
を形成した。次いでスクリーン印刷法により三角柱連続
突起の設けられている面と反対側の表面に幅８μｍ、間
隔５０μｍの遮光性ストライプを連続的に設けた。この
ようにして作製した、車両用窓映り防止光学フィルター
の窓映り防止性能を評価した結果、いかなる走行条件下
でも窓映り光は認識されず、また運転にも全く支障が無
かった。Example 8 With a wire-cut electric discharge machine, the apex angle and the remaining one angle were 52 ° and 25 °, respectively, and the angle side with the larger angle of the other two angles excluding the apex angle of the saw blade. A 2 mm-thick polycarbonate transparent substrate was formed by an injection molding method by using a mold having saw blade-shaped triangular prism continuous protrusions having a 10-point average roughness of 0.6 μm and an interval of 150 μm on the surface in contact with . Then, a light-shielding stripe having a width of 8 μm and a gap of 50 μm was continuously provided on the surface opposite to the surface provided with the triangular prism continuous protrusions by a screen printing method. As a result of evaluating the window reflection prevention performance of the vehicle window reflection prevention optical filter produced in this manner, no window reflection light was recognized under any running conditions, and there was no problem in driving.
【００５４】実施例９ 頂角及び残る１つの角をそれぞれ６８°，３０°とし、
かつ鋸刃の頂角を除く他の２つの角のうち角度の大きい
角側に接している面の１０点平均粗さが１．５μｍ、間
隔が２００μｍの鋸刃形状三角柱連続突起を用い、更に
遮光性ストライプの幅を１３μｍ、間隔を７５μｍとし
た他は、実施例３と全く同様な方法により車両用窓映り
防止光学フィルターを作製した。このようにして作製し
た、車両用窓映り防止光学フィルターの窓映り防止性能
を評価した結果、いかなる走行条件下でも窓映り光は認
識されず、また運転にも全く支障が無かった。Example 9 The apex angle and the remaining one angle are 68 ° and 30 °, respectively,
In addition, a saw blade-shaped triangular prism continuous protrusion having a 10-point average roughness of 1.5 μm and a spacing of 200 μm on the surface in contact with the larger angle of the two angles other than the apex angle of the saw blade is used. A vehicle window anti-glare optical filter was produced in the same manner as in Example 3 except that the width of the light-shielding stripe was 13 μm and the interval was 75 μm. As a result of evaluating the window reflection prevention performance of the vehicle window reflection prevention optical filter produced in this manner, no window reflection light was recognized under any running conditions, and there was no problem in driving.
【００５５】実施例１０ 頂角及び残る１つの角をそれぞれ５６°，２０°とし、
かつ鋸刃の頂角を除く他の２つの角のうち角度の大きい
角側に接している面の１０点平均粗さが５μｍ、間隔が
１００μｍの鋸刃形状三角柱連続突起を用い、更に遮光
性ストライプの幅を２４μｍ、間隔を９０μｍとした他
は、実施例３と全く同様な方法により車両用窓映り防止
光学フィルターを作製した。このようにして作製した、
車両用窓映り防止光学フィルターの窓映り防止性能を評
価した結果、いかなる走行条件下でも窓映り光は認識さ
れず、また運転にも全く支障が無かった。Example 10 The apex angle and the remaining one angle are 56 ° and 20 °, respectively,
In addition, a saw blade-shaped triangular prism continuous protrusion with a 10-point average roughness of 5 μm and a spacing of 100 μm is used for the surface in contact with the larger angle of the two angles other than the apex angle of the saw blade. A vehicle window anti-glare optical filter was produced in the same manner as in Example 3 except that the stripe width was 24 μm and the interval was 90 μm. Made in this way,
As a result of evaluating the window reflection prevention performance of the vehicle window reflection prevention optical filter, the window reflection light was not recognized under any driving condition, and there was no problem in driving.
【００５６】実施例１１ 頂角及び残る１つの角をそれぞれ８８°，１０°とし、
かつ鋸刃の頂角を除く他の２つの角のうち角度の大きい
角側に接している面の１０点平均粗さが９μｍ、間隔が
１２０μｍの鋸刃形状三角柱連続突起を用い、更に遮光
性ストライプの幅を１１μｍ、間隔を３５μｍとした他
は、実施例３と全く同様な方法により車両用窓映り防止
光学フィルターを作製した。このようにして作製した、
車両用窓映り防止光学フィルターの窓映り防止性能を評
価した結果、いかなる走行条件下でも窓映り光は認識さ
れず、また運転にも全く支障が無かった。Example 11 The apex angle and the remaining one angle are 88 ° and 10 °, respectively.
In addition, a saw blade-shaped triangular prism continuous projection with a 10-point average roughness of 9 μm and a spacing of 120 μm on the surface in contact with the larger angle of the two angles other than the apex angle of the saw blade is used to further shield light. A vehicle window anti-glare optical filter was produced in the same manner as in Example 3 except that the stripe width was 11 μm and the interval was 35 μm. Made in this way,
As a result of evaluating the window reflection prevention performance of the vehicle window reflection prevention optical filter, the window reflection light was not recognized under any driving condition, and there was no problem in driving.
【００５７】実施例１２ 表面に更にハードコート層として「トスガード」（東芝
シリコーン株式会社の商標名）を１μｍになるように塗
布した他は、実施例９と全く同様な方法により車両用窓
映り防止光学フィルターを作製した。このようにして作
製した、車両用窓映り防止光学フィルターの窓映り防止
性能を評価した結果、いかなる走行条件下でも窓映り光
は認識されず、また運転にも全く支障が無かった。Example 12 In the same manner as in Example 9 except that "Tosguard" (trade name of Toshiba Silicone Co., Ltd.) was further applied as a hard coat layer on the surface to prevent window reflection for vehicles. An optical filter was produced. As a result of evaluating the window reflection prevention performance of the vehicle window reflection prevention optical filter produced in this manner, no window reflection light was recognized under any running conditions, and there was no problem in driving.
【００５８】比較例１ センターコンソール中央部に設置されている時計の前面
に、ルーバー間隔２００μｍ、厚さ５００μｍの信越シ
リコン製遮光フィルターを挟み込んだ透明樹脂製カバー
を設けて窓映り防止性能を評価した結果、いかなる走行
条件下でも窓映り光は認識されなかったが、時計文字盤
部分が全体的に暗く見づらかった。Comparative Example 1 A transparent resin cover having a louver spacing of 200 μm and a thickness of 500 μm and a light-shielding filter made of Shin-Etsu Silicon sandwiched between them was provided on the front surface of a timepiece installed in the center of the center console, and the window reflection preventing performance was evaluated. As a result, the window light was not recognized under any driving condition, but the clock face part was totally dark and difficult to see.
【００５９】[0059]
【発明の効果】本発明の車両用窓映り防止光学フィルタ
ーは、窓映り防止性能が極めて優れ、いかなる走行条件
下でも窓映り光は認識されず、また運転にも全く支障を
きたすことがない優れたものである。また低コストで製
造でき、経済的にも有利である。INDUSTRIAL APPLICABILITY The vehicle window anti-glare optical filter of the present invention has excellent window anti-glare performance, no window glare is recognized under any driving conditions, and no trouble is caused in driving. It is a thing. Further, it can be manufactured at low cost, which is economically advantageous.
【図１】センターコンソール部分の断面拡大図及びドラ
イバーが時計から発せられる光により窓映り像を視認す
ることを説明する図である。FIG. 1 is an enlarged cross-sectional view of a center console portion and a view for explaining that a driver visually recognizes a window reflection image by light emitted from a timepiece.
【図２】フロントウインドウの室内表面側に反射防止膜
を設けることにより窓映り防止を施している方法を説明
する図である。FIG. 2 is a diagram illustrating a method for preventing window reflection by providing an antireflection film on the indoor surface side of the front window.
【図３】時計の前面に遮光フィルターを挟み込んだ透明
樹脂製カバーを設けてウインドウ方向へ発される光の角
度を制御することにより窓映り防止を施している方法を
説明する図である。FIG. 3 is a diagram for explaining a method for preventing window reflection by providing a transparent resin cover with a light blocking filter sandwiched on the front surface of the timepiece to control the angle of light emitted in the window direction.
【図４】本発明の車両用窓映り防止光学フィルターをセ
ンターコンソール中央部分の時計前面に透明樹脂製カバ
ーとして設置した場合の効果を説明する図である。FIG. 4 is a diagram for explaining the effect when the vehicle window reflection preventing optical filter of the present invention is installed as a transparent resin cover on the front face of the watch in the center of the center console.
【図５】本発明の車両用窓映り防止光学フィルターを通
過する光の屈折状況を説明するための断面部分拡大図で
ある。FIG. 5 is a partially enlarged sectional view for explaining a refraction state of light passing through a vehicle window anti-reflection optical filter of the present invention.
【図６】入射角が極端に大きい光線の場合の光の屈折状
況を説明するための断面部分拡大図である。FIG. 6 is an enlarged partial cross-sectional view for explaining a refraction state of light in the case of a light ray having an extremely large incident angle.
【図７】本発明の車両用窓映り防止光学フィルターの断
面部分拡大図である。FIG. 7 is an enlarged cross-sectional partial view of a vehicle window reflection preventing optical filter of the present invention.
【図８】本発明の車両用窓映り防止光学フィルターの遮
光機能を説明する図である。FIG. 8 is a diagram illustrating a light blocking function of the vehicle window reflection preventing optical filter of the present invention.
【図９】多重に反射する透過光を防止するために形状工
夫を施したことを説明する図である。FIG. 9 is a diagram illustrating that a shape is devised to prevent transmitted light that is reflected in multiple layers.
１ 時計 ２ フロントウインド ３ 視点 ４ 反射防止膜 ５ 透明樹脂製カバー ６ 車両用窓映り防止光学フィルター ７ 透明基板 ８ 接着剤層 ９ ハードコート層 1 Clock 2 Front window 3 Viewpoint 4 Antireflection film 5 Transparent resin cover 6 Vehicle window anti-reflection optical filter 7 Transparent substrate 8 Adhesive layer 9 Hard coat layer
Claims (5)
微細な三角柱突起を同一方向に連続して配置した車両用
窓映り防止光学フィルタにおいて、隣接する三角柱突起
の間隔が１０〜２００μｍの範囲で、かつ鋸刃の頂角お
よび残る１つの角がそれぞれ４０°〜８０°，１０°〜
４０°の範囲にあり、更に三角柱突起の配置されている
面と反対側の面に遮光性ストライプを設け、かつ遮光性
ストライプの幅が三角柱連続突起の間隔の１／２０〜１
／２で、隣接する遮光性ストライプの間隔が三角柱連続
突起の間隔の１／１〜１／２であることを特徴とする車
両用窓映り防止光学フィルター。1. A vehicle window anti-glare optical filter in which fine triangular prismatic protrusions having a sawtooth-shaped cross section are continuously arranged in the same direction on the surface of a transparent substrate, and the distance between adjacent triangular prismatic protrusions is 10 to 200 μm. And the vertical angle of the saw blade and the remaining one angle are 40 ° to 80 ° and 10 ° to
In the range of 40 °, a light-shielding stripe is provided on the surface opposite to the surface on which the triangular prism protrusions are arranged, and the width of the light-shielding stripe is 1/20 to 1 of the distance between the triangular prism continuous protrusions.
/ 2, the interval between adjacent light-shielding stripes is 1/1 to 1/2 of the interval between the triangular prism continuous protrusions.
度の大きい角側に接する面が粗面化され、当該面の粗さ
が１０点平均粗さＲｚで０．１μｍ〜１０μｍの範囲内
にあることを特徴とする請求項１記載の車両用窓映り防
止光学フィルター。2. A surface in contact with a corner having a larger angle of the two other angles excluding the apex angle of the saw blade is roughened, and the roughness of the surface is 0.1 μm in terms of 10-point average roughness Rz. The vehicle window anti-glare optical filter according to claim 1, wherein the optical filter is in a range of 10 μm.
面にハードコート層を設けることを特徴とする請求項１
又は２記載の車両用窓映り防止光学フィルター。3. A hard coat layer is provided on the surface of the surface while maintaining the cross-sectional shape.
Alternatively, the vehicle window reflection preventing optical filter according to item 2.
成し、当該フィルムを透明基板上に接着することを特徴
とする請求項１〜３いずれか１つの項記載の車両用窓映
り防止光学フィルター。4. The vehicle window antiglare optical filter according to claim 1, wherein the cross-sectional shape is formed on a transparent film surface and the film is adhered to a transparent substrate. .
起の間隔と同一であることを特徴とする請求項１〜４の
いずれか１つの項記載の車両用窓映り防止光学フィルタ
ー。5. The vehicle window antiglare optical filter according to claim 1, wherein the light-shielding stripes have the same spacing as the triangular prism projections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6284806A JPH08146206A (en) | 1994-11-18 | 1994-11-18 | Window reflection preventive optical filter for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6284806A JPH08146206A (en) | 1994-11-18 | 1994-11-18 | Window reflection preventive optical filter for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08146206A true JPH08146206A (en) | 1996-06-07 |
Family
ID=17683260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6284806A Pending JPH08146206A (en) | 1994-11-18 | 1994-11-18 | Window reflection preventive optical filter for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08146206A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0990926A2 (en) * | 1998-09-30 | 2000-04-05 | Mazda Motor Corporation | Mat surface structure |
| WO2014196596A1 (en) * | 2013-06-07 | 2014-12-11 | シャープ株式会社 | Lighting film, window glass, roll screen, and lighting louver |
| JP2017067979A (en) * | 2015-09-30 | 2017-04-06 | 大日本印刷株式会社 | Light control sheet and curtain having the same |
-
1994
- 1994-11-18 JP JP6284806A patent/JPH08146206A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0990926A2 (en) * | 1998-09-30 | 2000-04-05 | Mazda Motor Corporation | Mat surface structure |
| EP0990926A3 (en) * | 1998-09-30 | 2000-05-17 | Mazda Motor Corporation | Mat surface structure |
| WO2014196596A1 (en) * | 2013-06-07 | 2014-12-11 | シャープ株式会社 | Lighting film, window glass, roll screen, and lighting louver |
| CN105308483A (en) * | 2013-06-07 | 2016-02-03 | 夏普株式会社 | Lighting film, window glass, roll screen, and lighting louver |
| JPWO2014196596A1 (en) * | 2013-06-07 | 2017-02-23 | シャープ株式会社 | Daylighting film, window glass, roll screen and daylighting louver |
| CN107741610A (en) * | 2013-06-07 | 2018-02-27 | 夏普株式会社 | Daylighting film, glass pane, roller shutter and Lighting shutter |
| JP2017067979A (en) * | 2015-09-30 | 2017-04-06 | 大日本印刷株式会社 | Light control sheet and curtain having the same |
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