JP2004196184A - Window pane for automobile - Google Patents

Window pane for automobile Download PDF

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Publication number
JP2004196184A
JP2004196184A JP2002368945A JP2002368945A JP2004196184A JP 2004196184 A JP2004196184 A JP 2004196184A JP 2002368945 A JP2002368945 A JP 2002368945A JP 2002368945 A JP2002368945 A JP 2002368945A JP 2004196184 A JP2004196184 A JP 2004196184A
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JP
Japan
Prior art keywords
infrared
colored layer
window glass
detection member
glass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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JP2002368945A
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Japanese (ja)
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JP2004196184A5 (en
Inventor
Akihiko Saito
明彦 斉藤
Kuniko Nagai
久仁子 永井
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AGC Inc
Original Assignee
Asahi Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to JP2002368945A priority Critical patent/JP2004196184A/en
Publication of JP2004196184A publication Critical patent/JP2004196184A/en
Publication of JP2004196184A5 publication Critical patent/JP2004196184A5/ja
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets

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  • Radiation Pyrometers (AREA)
  • Surface Treatment Of Glass (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a window pane for an automobile having an infrared ray detection member and having an infrared ray transmitting colored layer with low transmittance of visible light formed on the adhesive part of the window pane. <P>SOLUTION: In this window pane for an automobile, an infrared ray transmitting colored layer 8 is fitted between the infrared ray detection member 6 and the glass pane 1. The infrared ray transmitting colored layer 8 is characterized in that visible light transmittance of the pane 1 is greater than 50%, and a light transmittance of the pane 1 is 30% or higher in a specified wavelength area of 800 to 1000 nm, the visible light transmittance through the glass pane 1 and the infrared ray transmitting colored layer 8 is 50% or less, and the light transmittance is 27% or more in the specified wavelength area of the 800 to 1000 nm area. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、赤外線検知部材を接着した自動車用窓ガラスに関する。
【0002】
【従来の技術】
近年の自動車には、搭乗者および積荷を目的地まで運ぶという目的を達成する上で、より快適に、より安全に目的地まで移動するための様々な機能を有する機器が取り付けられている。それら機器には、例えば、雨滴センサや、道路交通情報通信システム(以下VICSと称する)や、ナイトビジョンなどがある。
【0003】
雨滴センサは、フロントウインドシールドに付着した雨滴をワイパにより払拭する領域に対応したフロントウインドシールドの車室内側に装着され、フロントウインドシールドに向け赤外線を出力する赤外線発光ダイオードと、フロントウインドシールドと車外との界面で反射された赤外線を受ける受光ダイオードとを備える。雨滴センサの装着領域に雨滴が付着すると受光ダイオードの受光する赤外線の光量が減少し、雨滴を検知する。検知信号によってワイパが作動し、一定時間あたりの赤外線の受光量の低下率を、時間あたりの雨滴量として演算し、ワイパ制御装置は、低速作動、高速作動、間欠作動といったワイパの払拭作動を雨滴量に応じて行うことができる。
【0004】
VICSは、慢性化する交通渋滞や交通事故の軽減を目的としたもので、光ビーコンまたは電波ビーコン方式のシステムや広域のFM多重放送を利用して、日本道路交通情報センターが管理する情報をほぼリアルタイムで各ドライバーへ伝えるシステムである。このうち光ビーコン方式は、主要幹線道路に用いられており、光信号として赤外線を用いて、建造物や道路上の信号機に取り付けられた固定側赤外線送受信装置と、自動車内に設置された移動側赤外線送受信装置との間で、赤外線の送受信を行う。
【0005】
ナイトビジョンとは、夜間運転時に通常のヘッドランプが届く範囲外に潜在する危険物や障害物を運転者に知らせる赤外線暗視システムである。具体的には、前方の人や動物あるいは自動車などの対象物が放射する遠赤外線を赤外線カメラで撮影し、画像化して、ヘッドアップディスプレーによりバーチャルイメージとして表示する。
【0006】
これらの赤外線を利用した赤外線検知部材は、窓ガラスの車室内側に接着剤を介して貼り付けられることが多い(例えば、特許文献1参照。)。赤外線検知部材の設置位置は、窓ガラスの周縁部の暗色セラミックペーストの焼成体が形成されている領域に配され、赤外線検知部材が接着される部分は、上記領域に暗色セラミックペーストの焼成体を形成させないくりぬき部をつくり、赤外線を受光できるようにしている。
【0007】
図5に自動車用窓ガラス11に赤外線検知部材16を設置した従来例を示す。窓ガラス11は、ガラス板12とガラス板13と各ガラス板の間に設けられた樹脂からなる中間膜14とが積層された合わせガラスである。また、窓ガラス11の周縁部の車室内側表面には、暗色セラミックペーストの焼成体15が形成されている。上述したように窓ガラス11の車室内側の暗色セラミックペーストの焼成体15が形成されていないくりぬき部に、接着層17を介して赤外線検知部材16が接着されている。接着層17は、接着テープや接着剤からなり、赤外光を透過するが可視光も透過する。
【0008】
また、図5の変形例を図4に示す。図5のように赤外線検知部材16を接着層17を介して窓ガラス11に接着しており、さらに暗色セラミックペーストの焼成体15上に接着剤19を介して係止部材18を取り付け、この係止部材18で赤外線検知部材16を固定している。
【0009】
【特許文献1】
特開平11−37927号公報
【0010】
【発明が解決しようとする課題】
従来のように赤外線検知部材16が設置された自動車の車外側から窓ガラス11を見た場合、暗色セラミックペーストの焼成体が形成されてないくりぬき部において、接着層17が可視光を透過するため暗色セラミックペーストの焼成体の一部が欠けたように見え、さらに、くりぬき部から赤外線検知部材16の金属やレンズ等が見え、外観を悪くしている。
【0011】
また、赤外線検知部材16を接着テープによって窓ガラス11に取り付ける場合、赤外線検知部材の接着側の面は平面であるが窓ガラス11の接着側の面はわずかに湾曲しているため、窓ガラス11と接着層17との界面に気泡ができるおそれがある。さらに、赤外線検知部材16の接着側の面にわずかに段差や溝などがあると、接着層17と赤外線検知部材16との界面にも気泡ができるおそれがある。
【0012】
また、赤外線検知部材16を接着剤によって窓ガラス11に取り付ける場合、接着剤中、または赤外線検知部材16と接着層17、接着層17と窓ガラス11との間に気泡が発生し、赤外線検知部材16の取り付け完了後も接着層17中に気泡が残存するおそれがある。
【0013】
しかし、これらの気泡が、赤外線を乱反射させたりして赤外線検知部材16が正常な赤外線の検知ができなくならない程度であり、また、接着力が低下しない程度であっても、車外側から見た場合に気泡が目立ち外観を著しく損なう。そのため、赤外線検知部材16が赤外線の正常な検知が充分に可能であっても、窓ガラス11の外観上の見栄えが悪いという理由で、外観検査で不良品となり、赤外線検知部材16を備えた窓ガラス11が出荷できなくなることがある。
【0014】
そこで、本発明の目的は、自動車用窓ガラスに赤外線検知部材が備えられ、窓ガラスへの接着部に、可視光の透過率が低い赤外線透過性着色層を形成した自動車用窓ガラスを提供することにある。
【0015】
【課題を解決するための手段】
前記課題を解決するために本発明は、ガラス板と、ガラス板の周縁部に積層された暗色セラミックペーストの焼成体と、この焼成体の一部がくりぬかれたくりぬき部に配置された赤外線検知部材とを備えた自動車用窓ガラスであって、前記赤外線検知部材と前記ガラス板との間には、赤外線透過性着色層が介在されており、この赤外線透過性着色層は、前記ガラス板の可視光透過率が50%より高く、かつ800〜1000nmのうちの所定の波長域の光の透過率が30%以上であり、前記ガラス板とこの赤外線透過性着色層とを介した可視光透過率が50%以下となり、かつ800〜1000nmのうちの前記所定の波長域の光の透過率が27%以上となる着色層であることを特徴とする自動車用窓ガラスを提供する。
【0016】
ここで、所定の波長域というのは、前記赤外線検知部に利用される波長域のことであり、赤外線検知部材の用途により決まるものである。
【0017】
また、前記赤外線透過性着色層と前記赤外線検知部材との間に接着材料が介在されていることが好ましい。
【0018】
また、前記赤外線検知部材が雨滴センサ、赤外線送受信装置、赤外線カメラのうちの何れか一つ以上で構成されていることが好ましい。
【0019】
【発明の実施の形態】
次に、本発明の実施の形態の一例について図を用いて説明する。
【0020】
図1は、本発明の実施の形態の一例である自動車用窓ガラス1を模式的に示す概略断面図である。窓ガラス1は、ガラス板2とガラス板3と各ガラス板の間に設けられた樹脂からなる中間膜4とが積層された合わせガラスである。また、図2は、窓ガラス1の正面図であり、窓ガラス1の車室内側表面の周縁部には、暗色セラミックペーストの焼成体5が形成されており、窓ガラス1の上辺部に、くりぬき部9が形成されている。赤外線検知部材6は、暗色セラミックペーストの焼成体5のくりぬき部9に設置される。
【0021】
本発明は、暗色セラミックペーストの焼成体5のくりぬき部9に窓ガラス1と赤外線検知部材6との間に赤外線透過性着色層8を形成することを特徴とする。図1に示すように、窓ガラス1の車室内側表面に赤外線透過着色層8を形成し、赤外線透過性着色層8の上層に接着層7を形成し、その上に赤外線検知部材6を設置する。さらに、従来例で示した図4の係止部材8のようなもので赤外線検知部材6を固定してもよい。
【0022】
本発明の実施の形態の赤外線透過性着色層8は、着色層形成剤を暗色セラミックペーストの焼成体5のくりぬき部9に塗布して乾燥させることにより形成する。着色層形成剤は、ガラス板の可視光透過率が50%より高く、かつ800〜1000nmのうちの所定の波長の光が30%以上である際に、ガラス板と赤外線透過性着色層とを介した可視光透過率が50%以下となり、かつ800〜1000nmのうちの所定の波長の光の透過率が27%以上となる着色材料から形成されるのであって、染料または顔料などの着色材料、各種樹脂、溶剤とを合成することにより得られる。
【0023】
本実施の形態に使用される染料または顔料は、例えば、トリフェニルメタン系、アゾ系、キノン系(アントラキノン系を含む)、ポリメチン系、硫化染料、インジコイド系、フタロシアニン系、インドリノン系、キナクドリン系、ジオキサジンバイオレット、ペリノン系、ペリレン系、キノンイミン系、ピラゾロン系、スチルベン系、ジフェニルメタン系、アリザリン系、アクリジン系、チアゾール系、メチン系、ニトロ系、ニトロソ系、シアニン色素、タール系等の染料またはこれらを誘導した顔料が挙げられる。
【0024】
各種樹脂は、例えば、フェノール樹脂、ケトン樹脂、ロジン樹脂、アクリル誘導体化合物、イソシアネート基を含むまたはそれから誘導される化合物、または珪素化合物、フッ素を含む化合物、エステル誘導体化合物、アミド、イミド誘導体化合物、エーテル誘導体化合物、エポキシ誘導体、塩素を含む化合物、ビニル樹脂、アセチレン誘導体、セルロース誘導体、ニトロ基を含む化合物、ブチラール誘導体、アルキド樹脂、芳香族系樹脂等が挙げられる。
【0025】
より具体的には、本発明の着色層形成剤は、少なくとも油溶性染料、樹脂、エチルアルコールからなる。エチルアルコールは、主溶剤として用いるものであり、溶剤量の50質量%以上を含有する。主溶剤のエチルアルコールと併用して使用される溶剤としては、臭気や安全性の点から炭素数4以下のアルコール類が好ましく、ノルマルプロピルアルコール、イソプロピルアルコール、ノルマルブチルアルコール、イソブチルアルコール、ターシャリーブチルアルコールなどが挙げられる。さらには、乾燥性、染料の溶解性向上などの目的で、少量のベンジルアルコール、プロピレングリコールモノメチルエーテル等が使用できる。エチルアルコールと併用される溶剤は、1種あるいは複数使用できる。溶剤の使用量は、着色層形成剤の全量に対し65〜90質量%が好ましい。
【0026】
油溶性染料は、着色剤として使用するものであり、エチルアルコールに可溶な染料が使用できる。例えばニグロシン系染料、オイル染料、造塩タイプ油溶性染料、含金属錯塩染料、塩基性染料などが挙げられる。
【0027】
油溶性染料の使用量は、着色層形成剤の全量に対し、2〜20質量%添加することが好ましい。可視光透過率を50%以下にするには2質量%以上が好ましく、また、析出物の発生がなく良好な経時安定性を保ち、かつ、接着層を形成する際に接着テープや接着剤に悪影響を与えないという点で20質量%以下が好ましい。
【0028】
本発明の着色層形成剤に用いる樹脂は、特に非吸収性であるガラスに対する定着性向上に用いるものであり、着色層形成剤の粘度調整のために用いられる。前述した各種樹脂が挙げられるが、これらは、単独あるいは複数混合して使用でき、その使用量は着色層形成剤全量に対して1〜15質量%が好ましい。1質量%未満では非吸収面に対する定着性が不十分であり、15質量%を超えると着色層形成剤の粘度が高くなり濡れ性が悪くなる。以上に挙げられる材料を撹拌混合して着色層形成剤を得る。また、染料の耐久性を向上させるために、UVカット剤、酸化防止剤、安定剤等を混入してもよい。
【0029】
着色層形成剤の窓ガラス1に対する塗布量は、乾燥時の赤外線透過性着色層を形成した際に、厚さが0.1〜15μmとなる量である。好ましくは、0.5〜10μmとなる量である。赤外線透過性着色層が15μmを超えると、赤外線透過性着色層が剥離してしまうおそれがあり、また、赤外線透過性着色層が0.1μm未満であると、可視光透過率が50%を超えてしまい、本発明の課題を解決できなくなる。
【0030】
着色層形成剤の好ましい塗布領域は、窓ガラス1の車室内側表面の暗色セラミックペーストの焼成体5のくりぬき部9であり、塗布方法としては、刷毛塗り、スプレー塗り、浸漬塗り、ライン塗装の場合には、自動塗装機等が挙げられる。図2では、くりぬき部9が窓ガラス1の上辺部に位置しているが、特に限定されるものではない。また塗布領域が、くりぬき部9からはみ出しても、暗色セラミックペーストの焼成体5が形成されている領域であれば構わない。なお、着色層形成剤を窓ガラス1に塗布するに先立って、窓ガラス1に予め接着補助剤を塗布してプライマー層を形成しておくことで、窓ガラス1と赤外線透過性着色層8との接着性を向上できる。
【0031】
または、シランカップリング剤や、接着剤と親和性の有る官能基を有した有機物、または接着性を向上させるための無機物などの種々の添加剤を着色層形成剤に加えることにより、接着補助剤となるものでプライマー層を形成しなくても、充分な接着力が得られる。また、着色層形成剤の塗布後の処理は特に限定されない。また、表面積を大きくする材料を加えて、アンカー効果向上させてもよい。
【0032】
接着剤層7は、接着剤、粘着剤、または弾力性のあるシートで構成され、例えば赤外線を透過させるアクリル、シリコーン、エポキシ両面テープ接着剤、弾性ゴムなどが挙げられる。さらに、赤外線透過性着色層8に接着剤を塗布するに先立って、予め赤外線透過性着色層8側にまたは赤外線部材6側にまたは両方に接着補助剤となるものを塗布してプライマー層を形成しておくことで、赤外線透過性着色層8と赤外線検知部材6との接着性を向上できる。
【0033】
赤外線検知部材6は、赤外線を利用した雨滴センサでもよく、VICSなどの赤外線送受信装置でもよく、ナイトビジョンなどの赤外線カメラでもよい。また、赤外線検知部材6はいかなる形状であってもよい。
【0034】
【実施例】
以下に実施例を挙げて、本発明をより具体的に説明するが、本発明は下記の実施例に限定されるものではない。
【0035】
<1.着色層形成剤>
[実施例1]
オイルブルー613 10.5重量部、エタノール 55.0重量部、イソポピルアルコール 13.4重量部、ベンジルアルコール 5.0重量部、サルコシネートOH 5.0重量部、SILWET FZ−2164 0.1重量部、YP−90L(定着樹脂) 11.0重量部を、撹拌混合して溶解させ青色の着色層形成剤を得た。
【0036】
[実施例2]
スピロンレッドC−GH(染料) 10.5重量部、エタノール 72.0重量部、ベンジルアルコール 5.0重量部、SILWET FZ−2166 0.5重量部、YP−90L(定着樹脂) 10.0重量部、エスレックBX−10 2.0重量部を、撹拌混合して溶解させ赤色の着色層形成剤を得た。
【0037】
[比較例1]
ニグロシンベースEX(染料) 10.0重量部、エタノール 65.5重量部、ノルマルプロパノール 10.0重量部、ベンジルアルコール 4.0重量部、サルコシネート 5.0重量部、SILWET L−720 0.5重量部、ガムロジンWW(定着樹脂) 5.0重量部を、撹拌混合して溶解させ黒色の着色層形成剤を得た。
【0038】
<2.透過率分光特性試験>
厚さ2mmのガラス板2枚の間に、ポリビニルブチラールからなる膜を形成させた合わせガラスに、上記実施例1、2、比較例1の着色層形成剤を塗布し乾燥させ、赤外線透過性着色層を形成させた試料を得た。これら試料と赤外線透過性着色層を形成させていない未処理の合わせガラスとをJIS R 3106に規定されている分光透過率の測定方法に従って、分光光度計で波長300〜1500nmの間の分光透過率を測定した。透過率分光特性の結果を図3に示し、可視光線透過率Tv%(300〜1500nm)を表1に示す。
【0039】
【表1】

Figure 2004196184
【0040】
可視光透過率Tvが50%より低ければ、合わせガラスと赤外線検知部材との間に発生する気泡を目立たなくさせることができることを示し、赤外先(本発明の場合、波長が800〜1000nmの光を指す)の透過率が27%より高ければ、赤外線検知部材が正常な受信が行えることを示している。
【0041】
表1から、未処理の合わせガラスは、可視光透過率Tvが50%より高いが、実施例1、2、比較例1は50%以下を実現している。さらに、図3より、実施例1、2は、赤外線の透過率が27%以上であり、未処理の合わせガラスと変わらない透過率を実現している。しかし、比較例1は、赤外線の透過率が27%より低いため、本発明の赤外線透過性着色層には適さない。よって、実施例1、2の赤外線透過性着色層は、可視光透過率Tv50%以下であり、かつ赤外線の透過率27%以上を実現でき本発明に適しており、比較例1のように可視光透過率Tvをクリアしていても、赤外線の透過率がクリアできていないものは、本発明には適さない。
【0042】
【発明の効果】
従来までの自動車用窓ガラスは、車外側から見ると暗色セラミックペーストの焼成体のくりぬき部に接着剤層中に残存している気泡が見えることが多く、外観が悪くなり、検査で不良品となることあったが、本発明のように可視光透過率50%以下となる赤外線透過性着色層を形成することによって、接着剤層中に気泡が存在しても、目立たなくなる。また、赤外線透過性着色層によりガラスが着色されるため、暗色セラミックペーストの焼成体のくりぬき部自体が目立たなくなり、外観を損なわない。
【0043】
また、多くの赤外線を利用したセンサの光信号の波長が800〜1000nmの範囲内であるため、この波長の透過率が27%より低いと、赤外線を正しく送受信できなくなるが、本発明の赤外線透過性着色層は、800〜1000nmの波長の透過率が27%以上であるため、赤外線送受信装置が機能しなくなることはない。
【図面の簡単な説明】
【図1】本実施の形態による自動車用窓ガラスを示す概略断面図。
【図2】本実施の形態による自動車用窓ガラスを示す正面図。
【図3】実施例と比較例の透過率分光特性を示すグラフ。
【図4】従来の自動車用窓ガラスの変形例を示す概略断面図。
【図5】従来の自動車用窓ガラスを示す概略断面図。
【符号の説明】
1:自動車用窓ガラス
5:暗色セラミックスペーストの焼成体
6:赤外線検知部材
7:接着剤層
8:赤外線透過性着色層
9:くりぬき部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automotive window glass to which an infrared detection member is bonded.
[0002]
[Prior art]
In recent automobiles, devices having various functions for moving to a destination more comfortably and safely in order to achieve the purpose of carrying passengers and cargo to the destination are attached. Such devices include, for example, raindrop sensors, road traffic information communication systems (hereinafter referred to as VICS), and night vision.
[0003]
The raindrop sensor is mounted on the vehicle interior side of the front windshield corresponding to the area where raindrops attached to the front windshield are wiped off by the wiper, and an infrared light emitting diode that outputs infrared rays toward the front windshield, and the front windshield and the outside of the vehicle And a light-receiving diode that receives infrared rays reflected at the interface with each other. When raindrops adhere to the raindrop sensor mounting area, the amount of infrared light received by the light-receiving diode decreases, and raindrops are detected. The wiper is activated by the detection signal, and the rate of decrease in the amount of received infrared light per fixed time is calculated as the amount of raindrops per hour. The wiper control device performs wiper wiping operations such as low speed operation, high speed operation, and intermittent operation. Can be done depending on the amount.
[0004]
VICS is intended to reduce chronic traffic congestion and traffic accidents, and uses the optical beacon or radio beacon system and wide-area FM multiplex broadcasting to manage almost all information managed by the Japan Road Traffic Information Center. It is a system that communicates to each driver in real time. Of these, the optical beacon method is used for main trunk roads, and uses infrared as an optical signal, and a fixed infrared transmission / reception device attached to a traffic signal on a building or road, and a moving side installed in an automobile. Infrared transmission / reception is performed with an infrared transmission / reception device.
[0005]
Night vision is an infrared night vision system that informs the driver of potentially dangerous or obstructed objects that are outside the range of normal headlamps when driving at night. Specifically, far-infrared rays emitted from an object such as a person, an animal, or a car ahead are photographed with an infrared camera, converted into an image, and displayed as a virtual image by a head-up display.
[0006]
Infrared detection members using these infrared rays are often attached to the interior side of the window glass through an adhesive (see, for example, Patent Document 1). The infrared detection member is installed in the area where the dark ceramic paste fired body is formed on the peripheral edge of the window glass, and the part where the infrared detection member is bonded is the dark ceramic paste fired body in the area. A hollow part that cannot be formed is made so that infrared rays can be received.
[0007]
FIG. 5 shows a conventional example in which an infrared detection member 16 is installed on an automobile window glass 11. The window glass 11 is a laminated glass in which a glass plate 12, a glass plate 13, and an intermediate film 14 made of resin provided between the glass plates are laminated. Also, a fired body 15 of dark ceramic paste is formed on the vehicle interior side surface of the peripheral portion of the window glass 11. As described above, the infrared detecting member 16 is bonded to the hollow portion of the window glass 11 on the vehicle interior side where the fired body 15 of the dark color ceramic paste is not formed via the adhesive layer 17. The adhesive layer 17 is made of an adhesive tape or an adhesive, and transmits infrared light but also visible light.
[0008]
FIG. 4 shows a modification of FIG. As shown in FIG. 5, the infrared detecting member 16 is bonded to the window glass 11 via the adhesive layer 17, and the locking member 18 is attached to the dark ceramic paste fired body 15 via the adhesive 19, and this engagement is performed. The infrared detecting member 16 is fixed by the stop member 18.
[0009]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-37927
[Problems to be solved by the invention]
When the window glass 11 is viewed from the outside of the vehicle on which the infrared detection member 16 is installed as in the conventional case, the adhesive layer 17 transmits visible light in the hollow portion where the sintered body of the dark ceramic paste is not formed. A part of the fired body of the dark ceramic paste appears to be missing, and further, the metal or lens of the infrared detecting member 16 is visible from the hollowed portion, and the appearance is deteriorated.
[0011]
When the infrared detection member 16 is attached to the window glass 11 with an adhesive tape, the surface on the adhesion side of the infrared detection member is a flat surface, but the surface on the adhesion side of the window glass 11 is slightly curved. There is a possibility that bubbles may be formed at the interface between the adhesive layer 17 and the adhesive layer 17. Furthermore, if there are slight steps or grooves on the surface of the infrared detection member 16 on the bonding side, there is a possibility that bubbles may be formed at the interface between the adhesive layer 17 and the infrared detection member 16.
[0012]
Further, when the infrared detection member 16 is attached to the window glass 11 with an adhesive, bubbles are generated in the adhesive or between the infrared detection member 16 and the adhesive layer 17 and between the adhesive layer 17 and the window glass 11, and the infrared detection member. Even after the attachment of 16 is completed, there is a possibility that bubbles remain in the adhesive layer 17.
[0013]
However, even if these bubbles are such that the infrared detection member 16 cannot detect normal infrared rays due to irregular reflection of infrared rays, and the adhesive force does not decrease, it is viewed from the outside of the vehicle. In some cases, air bubbles are noticeable and the appearance is significantly impaired. Therefore, even if the infrared detection member 16 can sufficiently detect normal infrared rays, the window glass 11 is a defective product in appearance inspection because the appearance of the window glass 11 is poor, and the window provided with the infrared detection member 16 The glass 11 may not be shipped.
[0014]
Accordingly, an object of the present invention is to provide an automotive window glass in which an infrared detection member is provided on an automotive window glass, and an infrared transmissive colored layer having a low visible light transmittance is formed on an adhesive portion to the window glass. There is.
[0015]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a glass plate, a fired body of a dark ceramic paste laminated on a peripheral portion of the glass plate, and an infrared detector disposed in a hollowed portion in which a part of the fired body is hollowed out. An automotive window glass comprising a member, and an infrared transparent colored layer is interposed between the infrared detecting member and the glass plate, and the infrared transparent colored layer is formed on the glass plate. Visible light transmittance is higher than 50%, and the transmittance of light in a predetermined wavelength region of 800 to 1000 nm is 30% or more, and visible light is transmitted through the glass plate and the infrared transmissive colored layer. Provided is a window glass for an automobile, which is a colored layer having a rate of 50% or less and a transmittance of light in the predetermined wavelength range of 800 to 1000 nm of 27% or more.
[0016]
Here, the predetermined wavelength range is a wavelength range used for the infrared detection unit, and is determined by the application of the infrared detection member.
[0017]
Moreover, it is preferable that an adhesive material is interposed between the infrared transparent colored layer and the infrared detection member.
[0018]
Moreover, it is preferable that the said infrared detection member is comprised by any one or more of a raindrop sensor, an infrared transmitter / receiver, and an infrared camera.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Next, an example of an embodiment of the present invention will be described with reference to the drawings.
[0020]
FIG. 1 is a schematic cross-sectional view schematically showing an automotive window glass 1 which is an example of an embodiment of the present invention. The window glass 1 is a laminated glass in which a glass plate 2, a glass plate 3, and an intermediate film 4 made of a resin provided between the glass plates are laminated. Moreover, FIG. 2 is a front view of the window glass 1, and a fired body 5 of dark color ceramic paste is formed on the periphery of the vehicle window side surface of the window glass 1, and on the upper side of the window glass 1, A hollow portion 9 is formed. The infrared detection member 6 is installed in the hollowed portion 9 of the fired body 5 of dark ceramic paste.
[0021]
The present invention is characterized in that an infrared transmitting colored layer 8 is formed between a window glass 1 and an infrared detecting member 6 in a hollow portion 9 of a fired body 5 of dark ceramic paste. As shown in FIG. 1, an infrared transmitting colored layer 8 is formed on the surface of the window glass 1 on the vehicle interior side, an adhesive layer 7 is formed on the upper layer of the infrared transmitting colored layer 8, and an infrared detecting member 6 is installed thereon. To do. Further, the infrared detecting member 6 may be fixed with the locking member 8 of FIG. 4 shown in the conventional example.
[0022]
The infrared transmissive colored layer 8 according to the embodiment of the present invention is formed by applying a colored layer forming agent to the hollow portion 9 of the fired body 5 of the dark ceramic paste and drying it. When the visible light transmittance of the glass plate is higher than 50% and the light having a predetermined wavelength of 800 to 1000 nm is 30% or more, the colored layer forming agent is a glass plate and an infrared transparent colored layer. The visible light transmittance is 50% or less and the light transmittance of a predetermined wavelength of 800 to 1000 nm is 27% or more, and the coloring material such as a dye or pigment is used. It is obtained by synthesizing various resins and solvents.
[0023]
The dye or pigment used in the present embodiment is, for example, triphenylmethane, azo, quinone (including anthraquinone), polymethine, sulfur dye, indicoid, phthalocyanine, indolinone, quinacdrine, Dyes of dioxazine violet, perinone, perylene, quinoneimine, pyrazolone, stilbene, diphenylmethane, alizarin, acridine, thiazole, methine, nitro, nitroso, cyanine dye, tar, etc. The pigment which induced | guided | derived was mentioned.
[0024]
Various resins include, for example, phenol resins, ketone resins, rosin resins, acrylic derivative compounds, compounds containing isocyanate groups or derived therefrom, or silicon compounds, compounds containing fluorine, ester derivative compounds, amides, imide derivative compounds, ethers. Examples include derivative compounds, epoxy derivatives, compounds containing chlorine, vinyl resins, acetylene derivatives, cellulose derivatives, compounds containing nitro groups, butyral derivatives, alkyd resins, aromatic resins, and the like.
[0025]
More specifically, the colored layer forming agent of the present invention comprises at least an oil-soluble dye, a resin, and ethyl alcohol. Ethyl alcohol is used as a main solvent, and contains 50% by mass or more of the amount of solvent. As the solvent used in combination with the main solvent, ethyl alcohol, alcohols having 4 or less carbon atoms are preferable from the viewpoint of odor and safety. Normal propyl alcohol, isopropyl alcohol, normal butyl alcohol, isobutyl alcohol, tertiary butyl Examples include alcohol. Furthermore, a small amount of benzyl alcohol, propylene glycol monomethyl ether, or the like can be used for the purpose of improving drying properties and dye solubility. One or more solvents used in combination with ethyl alcohol can be used. As for the usage-amount of a solvent, 65-90 mass% is preferable with respect to the whole quantity of a colored layer formation agent.
[0026]
The oil-soluble dye is used as a colorant, and a dye soluble in ethyl alcohol can be used. Examples include nigrosine dyes, oil dyes, salt-forming oil-soluble dyes, metal-containing complex dyes, and basic dyes.
[0027]
The amount of the oil-soluble dye used is preferably 2 to 20% by mass based on the total amount of the colored layer forming agent. In order to reduce the visible light transmittance to 50% or less, it is preferably 2% by mass or more. Further, no precipitate is generated, good stability with time is maintained, and when forming an adhesive layer, an adhesive tape or adhesive is used. 20 mass% or less is preferable at the point which does not give a bad influence.
[0028]
The resin used for the colored layer forming agent of the present invention is used for improving the fixability to non-absorbing glass, and is used for adjusting the viscosity of the colored layer forming agent. Although various resin mentioned above is mentioned, these can be used individually or in mixture of multiple, and the usage-amount is preferable 1-15 mass% with respect to the coloring layer formation agent whole quantity. If it is less than 1% by mass, the fixing property to the non-absorbing surface is insufficient, and if it exceeds 15% by mass, the viscosity of the colored layer forming agent increases and the wettability deteriorates. The material mentioned above is stirred and mixed to obtain a colored layer forming agent. Further, in order to improve the durability of the dye, a UV cut agent, an antioxidant, a stabilizer and the like may be mixed.
[0029]
The amount of the colored layer forming agent applied to the window glass 1 is an amount such that the thickness becomes 0.1 to 15 μm when the infrared transparent colored layer is formed at the time of drying. The amount is preferably 0.5 to 10 μm. If the infrared transparent colored layer exceeds 15 μm, the infrared transparent colored layer may be peeled off. If the infrared transparent colored layer is less than 0.1 μm, the visible light transmittance exceeds 50%. Thus, the problem of the present invention cannot be solved.
[0030]
A preferable application region of the colored layer forming agent is a hollow portion 9 of the fired body 5 of the dark ceramic paste on the surface of the window glass 1 on the vehicle interior side. The application method includes brush coating, spray coating, dip coating, and line coating. In some cases, an automatic coating machine or the like is used. Although the hollow part 9 is located in the upper side part of the window glass 1 in FIG. 2, it is not specifically limited. Even if the application region protrudes from the cut-out portion 9, it may be any region as long as the fired body 5 of the dark ceramic paste is formed. In addition, before apply | coating a colored layer formation agent to the window glass 1, the window glass 1 and the infrared rays transmissive colored layer 8 are formed by apply | coating an adhesion auxiliary agent to the window glass 1 beforehand, and forming a primer layer. Can improve the adhesion.
[0031]
Alternatively, by adding various additives such as a silane coupling agent, an organic substance having a functional group having an affinity with the adhesive, or an inorganic substance for improving adhesiveness to the colored layer forming agent, an adhesion aid Thus, sufficient adhesion can be obtained without forming a primer layer. Moreover, the process after application | coating of a coloring layer forming agent is not specifically limited. Further, an anchor effect may be improved by adding a material for increasing the surface area.
[0032]
The adhesive layer 7 is composed of an adhesive, a pressure-sensitive adhesive, or an elastic sheet, and examples thereof include acrylic, silicone, epoxy double-sided tape adhesive, and elastic rubber that transmit infrared rays. Further, prior to applying the adhesive to the infrared transmissive colored layer 8, a primer layer is formed by previously applying an adhesive auxiliary agent on the infrared transmissive colored layer 8 side or the infrared member 6 side or both. By doing so, the adhesiveness between the infrared transmitting colored layer 8 and the infrared detecting member 6 can be improved.
[0033]
The infrared detection member 6 may be a raindrop sensor using infrared rays, an infrared transmission / reception device such as VICS, or an infrared camera such as night vision. The infrared detection member 6 may have any shape.
[0034]
【Example】
The present invention will be described more specifically with reference to the following examples. However, the present invention is not limited to the following examples.
[0035]
<1. Colored layer forming agent>
[Example 1]
Oil blue 613 10.5 parts by weight, ethanol 55.0 parts by weight, isopopyl alcohol 13.4 parts by weight, benzyl alcohol 5.0 parts by weight, sarcosinate OH 5.0 parts by weight, SILWET FZ-2164 0.1 parts by weight , YP-90L (fixing resin) 11.0 parts by weight was mixed by stirring and dissolved to obtain a blue colored layer forming agent.
[0036]
[Example 2]
Spiron Red C-GH (dye) 10.5 parts by weight, ethanol 72.0 parts by weight, benzyl alcohol 5.0 parts by weight, SILWET FZ-2166 0.5 parts by weight, YP-90L (fixing resin) 10.0 parts by weight Then, 2.0 parts by weight of ESRECK BX-10 was mixed by stirring and dissolved to obtain a red colored layer forming agent.
[0037]
[Comparative Example 1]
Nigrosine base EX (dye) 10.0 parts by weight, ethanol 65.5 parts by weight, normal propanol 10.0 parts by weight, benzyl alcohol 4.0 parts by weight, sarcosinate 5.0 parts by weight, SILWET L-720 0.5 parts by weight Part, 5.0 parts by weight of gum rosin WW (fixing resin) were mixed by stirring and dissolved to obtain a black colored layer forming agent.
[0038]
<2. Transmission spectral characteristic test>
The laminated layer glass in which a film made of polyvinyl butyral is formed between two glass plates having a thickness of 2 mm is coated with the colored layer forming agent of Examples 1 and 2 and Comparative Example 1 and dried, and is infrared-transparent colored. A sample with a layer formed was obtained. Spectral transmittance between 300 nm and 1500 nm in wavelength using a spectrophotometer for these samples and an untreated laminated glass on which an infrared transparent colored layer is not formed according to the method for measuring spectral transmittance defined in JIS R 3106. Was measured. The results of the transmittance spectral characteristics are shown in FIG. 3, and the visible light transmittance Tv% (300 to 1500 nm) is shown in Table 1.
[0039]
[Table 1]
Figure 2004196184
[0040]
If the visible light transmittance Tv is lower than 50%, it indicates that bubbles generated between the laminated glass and the infrared detecting member can be made inconspicuous, and the infrared tip (in the case of the present invention, the wavelength is 800 to 1000 nm). If the transmittance of light (which indicates light) is higher than 27%, it indicates that the infrared detection member can perform normal reception.
[0041]
From Table 1, the untreated laminated glass has a visible light transmittance Tv higher than 50%, but Examples 1 and 2 and Comparative Example 1 achieve 50% or less. Furthermore, from FIG. 3, Examples 1 and 2 have an infrared transmittance of 27% or more, and realize the same transmittance as that of an untreated laminated glass. However, since the infrared transmittance is lower than 27%, Comparative Example 1 is not suitable for the infrared transparent colored layer of the present invention. Therefore, the infrared transmissive colored layers of Examples 1 and 2 are suitable for the present invention because they have a visible light transmittance Tv of 50% or less and an infrared transmittance of 27% or more, and are visible as in Comparative Example 1. Even if the light transmittance Tv is cleared, the one that does not clear the infrared transmittance is not suitable for the present invention.
[0042]
【The invention's effect】
When viewed from the outside of the vehicle, conventional window glass for automobiles often shows air bubbles remaining in the adhesive layer in the hollow portion of the dark ceramic paste fired body. However, by forming an infrared transmissive colored layer having a visible light transmittance of 50% or less as in the present invention, even if bubbles are present in the adhesive layer, it becomes inconspicuous. Further, since the glass is colored by the infrared transmitting colored layer, the hollowed portion itself of the fired body of the dark ceramic paste becomes inconspicuous and the appearance is not impaired.
[0043]
In addition, since the wavelength of the optical signal of the sensor using many infrared rays is in the range of 800 to 1000 nm, if the transmittance of this wavelength is lower than 27%, infrared rays cannot be transmitted / received correctly. Since the transmittance of the wavelength of 800 to 1000 nm is 27% or more, the infrared transmission / reception device does not stop.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a window glass for an automobile according to the present embodiment.
FIG. 2 is a front view showing a window glass for an automobile according to the present embodiment.
FIG. 3 is a graph showing transmittance spectral characteristics of an example and a comparative example.
FIG. 4 is a schematic cross-sectional view showing a modification of a conventional automobile window glass.
FIG. 5 is a schematic cross-sectional view showing a conventional automobile window glass.
[Explanation of symbols]
1: automotive window glass 5: sintered body of dark ceramic paste 6: infrared detecting member 7: adhesive layer 8: infrared transmissive colored layer 9: hollow

Claims (3)

ガラス板と、ガラス板の周縁部に積層された暗色セラミックペーストの焼成体と、この焼成体の一部がくりぬかれたくりぬき部に配置された赤外線検知部材とを備えた自動車用窓ガラスであって、前記赤外線検知部材と前記ガラス板との間には、赤外線透過性着色層が介在されており、この赤外線透過性着色層は、前記ガラス板の可視光透過率が50%より高く、かつ800〜1000nmのうちの所定の波長域の光の透過率が30%以上であり、前記ガラス板とこの赤外線透過性着色層とを介した可視光透過率が50%以下となり、かつ800〜1000nmのうちの前記所定の波長域の光の透過率が27%以上となる着色層であることを特徴とする自動車用窓ガラス。A window glass for an automobile comprising a glass plate, a fired body of a dark ceramic paste laminated on a peripheral portion of the glass plate, and an infrared detection member disposed in a hollowed portion in which a part of the fired body is hollowed out. An infrared transparent colored layer is interposed between the infrared detecting member and the glass plate, and the infrared transparent colored layer has a visible light transmittance of higher than 50%, and The transmittance of light in a predetermined wavelength region of 800 to 1000 nm is 30% or more, the visible light transmittance through the glass plate and the infrared transmissive colored layer is 50% or less, and 800 to 1000 nm. The window glass for automobiles is a colored layer having a light transmittance of 27% or more in the predetermined wavelength region. 前記赤外線透過性着色層と前記赤外線検知部材との間に接着剤層が介在されていることを特徴とする請求項1に記載の自動車用窓ガラス。The window glass for automobiles according to claim 1, wherein an adhesive layer is interposed between the infrared transmissive colored layer and the infrared detection member. 前記赤外線検知部材が雨滴センサ、赤外線送受信装置、赤外線カメラのうちのいずれか一つ以上で構成されていることを特徴とする請求項1または2に記載の自動車用窓ガラス。The window glass for an automobile according to claim 1 or 2, wherein the infrared detection member is composed of one or more of a raindrop sensor, an infrared transmission / reception device, and an infrared camera.
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Cited By (13)

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JP2011530691A (en) * 2008-04-21 2011-12-22 エフエスシー カンパニー,リミテッド Raindrop sensor
WO2016072136A1 (en) * 2014-11-04 2016-05-12 日本板硝子株式会社 Windshield
JP2016088493A (en) * 2014-11-04 2016-05-23 日本板硝子株式会社 Wind shield
US20160291150A1 (en) * 2015-03-30 2016-10-06 Toyota Jidosha Kabushiki Kaisha Structure disposed with peripheral information detection sensor, and self-driving vehicle
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