JPS62215247A - Light switching element - Google Patents
Light switching elementInfo
- Publication number
- JPS62215247A JPS62215247A JP61058997A JP5899786A JPS62215247A JP S62215247 A JPS62215247 A JP S62215247A JP 61058997 A JP61058997 A JP 61058997A JP 5899786 A JP5899786 A JP 5899786A JP S62215247 A JPS62215247 A JP S62215247A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- glass layer
- polyvinyl butyral
- butyral resin
- 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.)
- Granted
Links
- 239000010410 layer Substances 0.000 claims abstract description 100
- 239000011521 glass Substances 0.000 claims abstract description 81
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims abstract description 29
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 28
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 18
- 238000002834 transmittance Methods 0.000 claims abstract description 8
- 239000002344 surface layer Substances 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims description 21
- 230000002745 absorbent Effects 0.000 claims description 10
- 239000002250 absorbent Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 239000012964 benzotriazole Substances 0.000 claims description 2
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 description 17
- 230000001681 protective effect Effects 0.000 description 7
- 239000011241 protective layer Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000005361 soda-lime glass Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000007738 vacuum evaporation Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000006124 Pilkington process Methods 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 235000011962 puddings Nutrition 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
- G02F1/1533—Constructional details structural features not otherwise provided for
Landscapes
- Liquid Crystal (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、自動車用のサンルーフガラス、フロントガラ
ス及び防眩ドアミラー、或いは、屋外用電子ディスプレ
イ、窓用調光ガラス、サンバイザー等に供される光スイ
ッチング素子に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to automobile sunroof glasses, windshields, and anti-glare door mirrors, outdoor electronic displays, window dimming glasses, sun visors, etc. This invention relates to optical switching elements.
光スイッチング素子には、エレク１〜ロクロミンク（以
下ＥＣと称する）材料を用いた調光ガラスにより形成し
た、例えば自動軍用サンルーフガラス、サイドガラス、
及び防眩ミラー等がある。また、液晶材料を用いた防眩
ミラー及び屋外のパブリンク表示等についても既に提案
されている。このような光スイソヂング素子に使用され
る上記ＥＣ材料及び液晶材料は、屋外での紫外線を含む
太陽光による光寿命が短いものである。従って、この欠
点を改善するために、従来の光スイッチング素子は、紫
外線吸収剤を混入させたアクリル系フィルム或いは偏光
フィルムからなる保護フィルムが表面層上に貼着されて
いた。Optical switching elements include, for example, automatic military sunroof glass, side glass,
and anti-glare mirrors. Furthermore, anti-glare mirrors and outdoor public link displays using liquid crystal materials have already been proposed. The above-mentioned EC materials and liquid crystal materials used in such optical switching devices have a short optical lifetime due to exposure to sunlight including ultraviolet rays outdoors. Therefore, in order to improve this drawback, in conventional optical switching elements, a protective film made of an acrylic film or a polarizing film mixed with an ultraviolet absorber is pasted on the surface layer.
ところが、上記従来の構造では、上記の保護フィルムは
硬度が低いため、砂が衝突した際、或いは汚れを拭き取
る際に傷が付き易い。また、表面にうねりを有しがちで
あるため写出された像が歪み易い。さらに、アクリル系
等の保護フィルムが表面に露出した構造であるため、耐
薬品性、耐熱性及び耐候性が低い。その上、例えば自動
車用フロントガラス及び防眩ドアミラー等のように曲面
形の光スイッチング素子の場合には、保護フィルムの貼
着作業が困難である等の欠点を有していた。However, in the conventional structure, since the protective film has low hardness, it is easily damaged when sand collides with it or when dirt is wiped off. Furthermore, since the surface tends to have undulations, the captured image is likely to be distorted. Furthermore, since it has a structure in which a protective film such as acrylic is exposed on the surface, it has low chemical resistance, heat resistance, and weather resistance. Moreover, in the case of curved optical switching elements, such as those used in automobile windshields and anti-glare door mirrors, there have been drawbacks such as difficulty in attaching a protective film.
本発明は、上記従来の問題点を考慮して成されたもので
あって、安価かつ簡単な構造により、紫外線及び傷の発
生に対する保護機能を有すると共に、可視光領域の光透
過率を向上し、かつ表面形状に関わらず簡単に上記の保
護機能を備えることができる光スイッチング素子の提供
を目的とするものである。The present invention has been made in consideration of the above-mentioned conventional problems, and has an inexpensive and simple structure that has a protective function against ultraviolet rays and scratches, and improves light transmittance in the visible light region. It is an object of the present invention to provide an optical switching element which can easily provide the above protection function regardless of the surface shape.
本発明の光スイッチング素子は、上記の目的を達成する
ために、入射光の透過率を調整する調光機能を備えた光
スイッチング素子において、この光スイッチング素子の
表面層上に、紫外線吸収剤とポリビニルブチラール樹脂
との混合物から成る紫外線吸収剤入ポリビニルブチラー
ル樹脂層を設け、この紫外線吸収剤入ポリビニルブチラ
ール樹脂層上に表側ガラス層を設け、安価かつ簡単な構
造により紫外線及び傷の発生に対する保護機能を備える
ことができるように構成したことを特徴とするものであ
る。In order to achieve the above object, the optical switching element of the present invention is an optical switching element equipped with a dimming function that adjusts the transmittance of incident light. A polyvinyl butyral resin layer with an ultraviolet absorber made of a mixture with a polyvinyl butyral resin is provided, and a front glass layer is provided on the polyvinyl butyral resin layer with an ultraviolet absorber, providing protection against ultraviolet rays and scratches with an inexpensive and simple structure. It is characterized by being configured so that it can be equipped with the following.
〔実施例１〕
本発明の第１実施例を第１図に基づいて以下に説明する
。[Example 1] A first example of the present invention will be described below based on FIG. 1.
光スイッチング素子であるエレクトロクロミック（以下
ＥＣと称する）式サンルーフガラスは、表側ガラス層１
、中間ガラス層２及び裏側ガラス層３の３枚の平面状ガ
ラス層を有しており、表側ガラス層１と中間ガラス層２
との間には紫外線吸収剤入ポリビニルブチラール樹脂層
４が、また中間ガラス層２と裏側ガラス層３との間には
ＥＣ層５が各々介装された構造を成している。言い換え
ると、中間ガラス層２、ＥＣ層５及び裏側ガラス層３に
て構成されるＥＣパネルの表面層となる中間ガラス層２
上に、紫外線吸収剤入ポリビニルブチラール樹脂層４が
設けられ、この上に表側ガラス層１が設けられたもので
ある。Electrochromic (hereinafter referred to as EC) type sunroof glass, which is an optical switching element, has a front glass layer 1.
, has three planar glass layers, an intermediate glass layer 2 and a back glass layer 3, and a front glass layer 1 and an intermediate glass layer 2.
A polyvinyl butyral resin layer 4 containing an ultraviolet absorber is interposed between the intermediate glass layer 2 and the back glass layer 3, and an EC layer 5 is interposed between the intermediate glass layer 2 and the back glass layer 3. In other words, the intermediate glass layer 2 becomes the surface layer of the EC panel composed of the intermediate glass layer 2, the EC layer 5, and the back side glass layer 3.
A polyvinyl butyral resin layer 4 containing an ultraviolet absorber is provided on top, and a front glass layer 1 is provided on top of this.
上記の構成において、ＥＣ式サンルーフガラスの製造は
以下の工程にて行われる。In the above configuration, the EC type sunroof glass is manufactured through the following steps.
先ず、一般的なＥＣパネルの製造方法により、中間ガラ
ス層２及び裏側ガラス層３となる４５ｃｍ角の２枚のソ
ーダ石灰ガラス板の間に電極及びＥＣ層５を形成し、こ
れらをエポキシ系またはガラス系接着剤でシール接着し
、さらに電解液を充填してＥＣパネルとする。次に、表
側ガラス層１となる表面未処理の５顛面子面保護ガラス
板を準備し、この平面保護ガラス板と上記ＥＣパネル表
面の中間ガラス層２とを洗浄する。また、紫外線吸収剤
入ポリビニルブチラール樹脂層４となる、ヘンシトリア
ゾール系の紫外線吸収剤０．５％とポリビニルブチラー
ル樹脂９９．５％とを混練して形成したフィルム状の混
合物を用意し、これを洗浄して乾燥する。次に、上記Ｅ
Ｃパネルの中間ガラス層２と保護ガラスとの間に上記の
混合物を挟み、ロール方式（１〜１０ｋｇ／ｃＪ） 、
または減圧方式（６００ｎ璽Ｈｇ以上）で加温（６０〜
１００℃）しながら予備接着する。そして、最終的には
油圧式または空気圧式のオートクレーブ（８０〜１２０
℃、５〜１５ｋｇ／、ｆｆ１）により本接着し、ＥＣパ
ネル上に紫外線吸収剤入ポリビニルブチラール樹脂層４
及び表側ガラス層１を設ける。尚、上記紫外線吸収剤は
、吸収する紫外線の波長を考慮してベンゾトリアゾール
系を使用している。また紫外線吸収剤入ポリビニルブチ
ラール樹脂層４の端面には防湿剤を塗布する。First, using a general EC panel manufacturing method, electrodes and an EC layer 5 are formed between two 45 cm square soda lime glass plates that will become the intermediate glass layer 2 and the back glass layer 3, and these are made of epoxy or glass. The panels are sealed with adhesive and then filled with electrolyte to form an EC panel. Next, a five-sided protective glass plate with an untreated surface that will become the front glass layer 1 is prepared, and this flat protective glass plate and the intermediate glass layer 2 on the surface of the EC panel are cleaned. In addition, a film-like mixture formed by kneading 0.5% of a hensitriazole-based ultraviolet absorber and 99.5% of polyvinyl butyral resin, which will become the ultraviolet absorbent-containing polyvinyl butyral resin layer 4, is prepared. Wash and dry. Next, the above E
The above mixture was sandwiched between the intermediate glass layer 2 of the C panel and the protective glass, and the roll method (1 to 10 kg/cJ) was applied.
Or heating with reduced pressure (600nHg or more)
100°C) for preliminary adhesion. Finally, a hydraulic or pneumatic autoclave (80 to 120
℃, 5 to 15 kg/, ff1), and a UV absorber-containing polyvinyl butyral resin layer 4 is placed on the EC panel.
and a front glass layer 1 is provided. Incidentally, as the above-mentioned ultraviolet absorber, a benzotriazole type is used in consideration of the wavelength of the ultraviolet rays to be absorbed. Further, a moisture-proofing agent is applied to the end face of the ultraviolet absorbent-containing polyvinyl butyral resin layer 4.
このようにして形成されたＥＣ式サンルーフガラスは、
４００ｎｍ以下の紫外光が上記紫外線吸収剤入ポリビニ
ルブチラール樹脂層４にて吸収され、これにより素子の
光寿命が向上される。The EC type sunroof glass formed in this way is
Ultraviolet light of 400 nm or less is absorbed by the ultraviolet absorbent-containing polyvinyl butyral resin layer 4, thereby improving the optical life of the device.
〔実施例２〕
本発明の第２実施例を第２図に基づいて以下に説明ずろ
。[Embodiment 2] A second embodiment of the present invention will be explained below based on FIG. 2.
光スイッチング素子である液晶（ＬＣ）式防眩ドアミラ
ーは、背面に曲面状の保８ｉｉ層８が設けられており、
この保護層８上に、順次、各々曲面状を成すへ１反射層
６、裏側ガラス層３、ゲストホス１へ型液晶層７、中間
ガラス層２、紫外線吸収剤入ポリビニルブチラール樹脂
層４及び表側ガラス層１が設けられた構成である。言い
換えると、保護層８、Ａ７！反躬層６、裏側ガラス層３
、ゲス１〜ホスト型液晶層７及び中間ガラス層２にて構
成される液晶素子の表面層となる中間ガラス層２上に、
紫外線吸収剤入ポリビニルブチラール樹脂層４を設け、
この上に表側ガラス層１を設けたものである。The liquid crystal (LC) type anti-glare door mirror, which is an optical switching element, has a curved protective layer 8 on the back.
On this protective layer 8, a reflective layer 6, a back side glass layer 3, a guest phosphor layer 1, a back type liquid crystal layer 7, an intermediate glass layer 2, a polyvinyl butyral resin layer 4 containing an ultraviolet absorber, and a front glass layer are sequentially formed on the protective layer 8, each having a curved surface shape. This is a configuration in which layer 1 is provided. In other words, protective layer 8, A7! Anti-reflective layer 6, back glass layer 3
, on the intermediate glass layer 2 which becomes the surface layer of the liquid crystal element composed of the guess 1 to the host type liquid crystal layer 7 and the intermediate glass layer 2,
A polyvinyl butyral resin layer 4 containing an ultraviolet absorber is provided,
A front side glass layer 1 is provided on this.
上記の構成において、ＬＣ式防眩ドアミラーは以下の工
程にて製造される。In the above configuration, the LC type anti-glare door mirror is manufactured in the following steps.
先ず、３枚の厚み１鶴の平面ソーダ石灰ガラス板を準備
する。この３枚のガラス板を通常のドアミラーのように
曲率１０００ ｍ＊ψの曲面状に熱変形させ、さらに、
任意の曲線形状にカットして曲面ガラス板を形成する。First, three flat soda-lime glass plates each having a thickness of 1 square inch are prepared. These three glass plates are thermally deformed into a curved surface with a curvature of 1000 m*ψ like a normal door mirror, and further,
A curved glass plate is formed by cutting into an arbitrary curved shape.
次いで、先ず２枚の曲面ガラス板により、通常の液晶素
子と同じ製法にて電極及び配向膜等を形成した後、これ
ら２枚のガラス板の間隙にゲストポスト型液晶を充填し
、裏側ガラス層３、ゲストホスト型液晶層７及び中間ガ
ラス層２を形成する。残り１枚のガラス板は凸面側に多
層蒸着、ディッピング或いはエツチングを行い、反射防
止処理を施す。次に、このガラス板と液晶素子を洗浄し
、ガラス板の凹面側と液晶素子の表面層である中間ガラ
ス層２との間に、ペンヅトリアゾール系の紫外線吸収剤
とポリビニルブチラールフィルムとを混練して形成した
フィルム状の混合物を挟み、真空蒸着装置に入れる。真
空蒸着装置内でこれを６０〜１００°Ｃに３０分間加熱
して、液晶素子パネル、紫外線吸収剤入ポリビニルブチ
ラール樹脂層４及び表側ガラス層１を予備接着する。紫
外線吸収剤入ポリビニルブチラール樹脂層４の端面には
防湿剤を塗布する。そして同時に液晶素子パネルの凹面
側にＡＩ反射層６を形成する。これを装置から取り出し
、前記第１実施例と同様にオートクレーブにて本接着を
行った後、保護層８を形成する。Next, first, electrodes, alignment films, etc. are formed using two curved glass plates using the same manufacturing method as for ordinary liquid crystal elements, and then a guest post type liquid crystal is filled in the gap between these two glass plates, and a back side glass layer is formed. 3. Form a guest-host type liquid crystal layer 7 and an intermediate glass layer 2. The remaining glass plate is subjected to multilayer vapor deposition, dipping, or etching on the convex side to provide antireflection treatment. Next, the glass plate and liquid crystal element are cleaned, and a pendutriazole-based ultraviolet absorber and polyvinyl butyral film are kneaded between the concave side of the glass plate and the intermediate glass layer 2, which is the surface layer of the liquid crystal element. The film-like mixture formed by this process is sandwiched and placed in a vacuum evaporation device. This is heated to 60 to 100° C. for 30 minutes in a vacuum evaporation apparatus to preliminarily bond the liquid crystal element panel, the ultraviolet absorbent-containing polyvinyl butyral resin layer 4, and the front glass layer 1. A moisture-proofing agent is applied to the end face of the ultraviolet absorbent-containing polyvinyl butyral resin layer 4. At the same time, an AI reflective layer 6 is formed on the concave side of the liquid crystal element panel. This is taken out from the apparatus, and after main adhesion is performed in an autoclave in the same manner as in the first embodiment, a protective layer 8 is formed.
このようにして形成されたＬＣ式防眩ドアミラーは、約
４００ｎｍ以下の紫外光が紫外線吸収剤人ポリビニルプ
ヂラール樹脂層で吸収されることにより、素子の光寿命
が向上されると共に、可視光領域の光線透過率が向上さ
れ、０Ｎ１０ＦＦの反射率の差の大きいものとなる。The LC type anti-glare door mirror formed in this way improves the light life of the element by absorbing ultraviolet light of approximately 400 nm or less in the ultraviolet absorber polyvinyl pudding resin layer. The light transmittance of the region is improved, and the difference in reflectance between 0N10FF becomes large.
本発明の光スイッチング素子は、以上のように、入射光
の透過率を調整する調光機能を備えた光スイッチング素
子において、この光スイッチング素子の表面層上に、紫
外線吸収剤とポリビニルブチラール樹脂との混合物から
成る紫外線吸収剤入ポリビニルブチラール樹脂層を設け
、この紫外ｙＡ吸吸収大人ポリビニルブチラール樹脂層
上表側ガラス層を設けた構成であるから、以下に記す多
数の効果を奏し得る。As described above, the optical switching element of the present invention is an optical switching element equipped with a dimming function that adjusts the transmittance of incident light. Since the structure includes a polyvinyl butyral resin layer containing an ultraviolet absorber containing a mixture of the following, and a glass layer on the front side of the ultraviolet yA absorbing adult polyvinyl butyral resin layer, a number of effects described below can be achieved.
１、優れた耐光性を有する。即ち、光スイッチング素子
は、主に紫外光により劣化され易く、この紫外光を紫外
線吸収剤入ポリビニルブチラール樹脂層で吸収すること
により、光寿命を延長することができる。1. Has excellent light resistance. That is, the optical switching element is easily deteriorated mainly by ultraviolet light, and by absorbing this ultraviolet light with the ultraviolet absorbent-containing polyvinyl butyral resin layer, the optical life can be extended.
２、優れた耐擦傷性を有する。即ち、表面がガラス層で
被われているため、表面硬度が高く傷が生じ難い。2. Has excellent scratch resistance. That is, since the surface is covered with a glass layer, the surface hardness is high and scratches are difficult to occur.
３、優れた耐薬品性を有する。即ち、表面がガラス層で
被われているため、有機溶剤等で侵され難い。3. Has excellent chemical resistance. That is, since the surface is covered with a glass layer, it is difficult to be attacked by organic solvents and the like.
４、優れた平坦性を有する。即ち、表面にガラス層を有
することにより、フィルムを表面層としたときのように
、製法上或いは粘着剤で貼着する際に生じるうねりがな
く、極めて平坦な表面を得ることができ、防眩ミラー等
に使用した場合に像のひずみが起こらない。尚、ガラス
層はコルバーン法で製造するよりもフロート法で製造す
る方が良好な平坦性を得ることができる。4. Excellent flatness. In other words, by having a glass layer on the surface, unlike when a film is used as the surface layer, there is no waviness that occurs due to the manufacturing process or when sticking with an adhesive, and an extremely flat surface can be obtained. No image distortion occurs when used in mirrors, etc. Note that better flatness can be obtained when the glass layer is manufactured by the float method than by the Colburn method.
５、優れた透過率特性を有する。即ち、ポリビニルブチ
ラール樹脂の屈折率がガラスの屈折率に近いことにより
、表側ガラス層から紫外線吸収剤入ポリビニルブチラー
ル樹脂層へ入射する光の透過率が大きくなる。さらに、
表側ガラス層に反射防止処理を施した場合には、表側ガ
ラス層での入射光の反射ロスが減少する。従って、０Ｎ
１０ＦＦの反射率の差またはコントラスト比を増大する
ことができる。5. Has excellent transmittance characteristics. That is, since the refractive index of the polyvinyl butyral resin is close to the refractive index of glass, the transmittance of light that enters the ultraviolet absorbent-containing polyvinyl butyral resin layer from the front glass layer increases. moreover,
When antireflection treatment is applied to the front glass layer, reflection loss of incident light on the front glass layer is reduced. Therefore, 0N
The reflectance difference or contrast ratio can be increased by 10FF.
６、曲面形素子の形成が容易である。即ち、ポリビニル
ブチラールは容易に熱変形させることができ、各々曲面
形状を成す素子と表側ガラス層との間に介装して熱プレ
スすることにより、任意の形状に形成し得る。6. It is easy to form curved elements. That is, polyvinyl butyral can be easily thermally deformed, and can be formed into any shape by interposing the element between the curved element and the front glass layer and hot pressing.
７゛、飛散防止機能を有する。即ち、表側ガラス層が何
らかの衝撃を受けることにより破損することがあっても
、紫外線吸収剤入ポリビニルブチラール樹脂層はフィル
ム状であるため、ガラスの飛散が防止される。7゛, has a scattering prevention function. That is, even if the front glass layer is damaged due to some kind of impact, the ultraviolet absorbent-containing polyvinyl butyral resin layer is in the form of a film, so the glass is prevented from scattering.
第１図は本発明の一実施例を示す斜視図、第２図は他の
実施例を示す斜視図である。
１は表側ガラス層、２は中間ガラス層、３は裏側ガラス
層、４は紫外線吸収剤入ポリビニルブチラール樹脂層、
５はエレクトロクロミック（ＥＣ）層、６はＡ４２反射
層、７はゲストホスト型液晶層である。FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing another embodiment. 1 is a front glass layer, 2 is an intermediate glass layer, 3 is a back glass layer, 4 is a polyvinyl butyral resin layer containing an ultraviolet absorber,
5 is an electrochromic (EC) layer, 6 is an A42 reflective layer, and 7 is a guest-host type liquid crystal layer.
Claims (1)
ッチング素子において、この光スイッチング素子の表面
層上に、紫外線吸収剤とポリビニルブチラール樹脂との
混合物から成る紫外線吸収剤入ポリビニルブチラール樹
脂層を設け、この紫外線吸収剤入ポリビニルブチラール
樹脂層上に表側ガラス層を設けたことを特徴とする光ス
イッチング素子。 ２、上記の紫外線吸収剤は、ベンゾトリアゾール系であ
る特許請求の範囲第１項記載の光スイッチング素子。 ３、上記の表面ガラス層は、反射防止処理の施されたも
のである特許請求の範囲第１項記載の光スイッチング素
子。[Claims] 1. In an optical switching element with a dimming function that adjusts the transmittance of incident light, an ultraviolet ray made of a mixture of an ultraviolet absorber and a polyvinyl butyral resin is provided on the surface layer of the optical switching element. 1. An optical switching element characterized in that an absorbent-containing polyvinyl butyral resin layer is provided, and a front glass layer is provided on the ultraviolet absorbent-containing polyvinyl butyral resin layer. 2. The optical switching device according to claim 1, wherein the ultraviolet absorber is benzotriazole-based. 3. The optical switching element according to claim 1, wherein the surface glass layer is subjected to antireflection treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61058997A JPS62215247A (en) | 1986-03-17 | 1986-03-17 | Light switching element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61058997A JPS62215247A (en) | 1986-03-17 | 1986-03-17 | Light switching element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62215247A true JPS62215247A (en) | 1987-09-21 |
| JPH0529092B2 JPH0529092B2 (en) | 1993-04-28 |
Family
ID=13100493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61058997A Granted JPS62215247A (en) | 1986-03-17 | 1986-03-17 | Light switching element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62215247A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0159225U (en) * | 1987-10-09 | 1989-04-13 | ||
| US5239406A (en) * | 1988-02-12 | 1993-08-24 | Donnelly Corporation | Near-infrared reflecting, ultraviolet protected, safety protected, electrochromic vehicular glazing |
| JPH0695170A (en) * | 1992-05-21 | 1994-04-08 | Saint Gobain Vitrage Internatl | Windowpane for building |
| US5355245A (en) * | 1988-02-12 | 1994-10-11 | Donnelly Corporation | Ultraviolet protected electrochemichromic rearview mirror |
| JP2007163661A (en) * | 2005-12-12 | 2007-06-28 | Bridgestone Corp | Panel for information display and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5557771U (en) * | 1978-06-14 | 1980-04-19 | ||
| JPS57167009A (en) * | 1981-04-09 | 1982-10-14 | Asahi Glass Co Ltd | Dimming body |
| JPS5834438A (en) * | 1981-08-24 | 1983-02-28 | Seiko Instr & Electronics Ltd | Electrochromic display device |
| JPS6194819U (en) * | 1984-11-29 | 1986-06-18 |
-
1986
- 1986-03-17 JP JP61058997A patent/JPS62215247A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5557771U (en) * | 1978-06-14 | 1980-04-19 | ||
| JPS57167009A (en) * | 1981-04-09 | 1982-10-14 | Asahi Glass Co Ltd | Dimming body |
| JPS5834438A (en) * | 1981-08-24 | 1983-02-28 | Seiko Instr & Electronics Ltd | Electrochromic display device |
| JPS6194819U (en) * | 1984-11-29 | 1986-06-18 |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0159225U (en) * | 1987-10-09 | 1989-04-13 | ||
| US5239406A (en) * | 1988-02-12 | 1993-08-24 | Donnelly Corporation | Near-infrared reflecting, ultraviolet protected, safety protected, electrochromic vehicular glazing |
| US5355245A (en) * | 1988-02-12 | 1994-10-11 | Donnelly Corporation | Ultraviolet protected electrochemichromic rearview mirror |
| US5523877A (en) * | 1988-02-12 | 1996-06-04 | Donnelly Corporation | Reduced near-infrared radiation transmitting ultraviolet protected, safety protected, electrochromic vehicular glazing |
| US5680245A (en) * | 1988-02-12 | 1997-10-21 | Donnelly Corporation | Reduced ultraviolet radiation transmitting, electrochromic assembly |
| US5864419A (en) * | 1988-02-12 | 1999-01-26 | Donnelly Corporation | Near-infrared reflecting, ultraviolet protected, safety protected, electrochromic vehicular glazing |
| US5986797A (en) * | 1988-02-12 | 1999-11-16 | Donnelly Corporation | Reduced ultraviolet radiation transmitting, safety protected electrochromic glazing assembly |
| US6819467B2 (en) | 1988-02-12 | 2004-11-16 | Donnelly Corporation | Reduced ultraviolet radiation transmitting, variable transmission, glazing assembly |
| JPH0695170A (en) * | 1992-05-21 | 1994-04-08 | Saint Gobain Vitrage Internatl | Windowpane for building |
| EP0818600A2 (en) * | 1992-05-21 | 1998-01-14 | Saint-Gobain Vitrage | Electrochromic glazing |
| EP0818600A3 (en) * | 1992-05-21 | 2000-09-20 | Saint-Gobain Vitrage | Electrochromic glazing |
| JP2007163661A (en) * | 2005-12-12 | 2007-06-28 | Bridgestone Corp | Panel for information display and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0529092B2 (en) | 1993-04-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |